BACKGROUND OF THE INVENTION
1. Field of the Invention
5 The present invention relates to a bobbin conveying
tray on which a bobbin with a yarn wound is attached.
2. Description of the Related Art
A bobbin conveying system adapted to attach a bobbin
10 with a yarn wound to a tray, and to convey the tray attached
with the bobbin to a winder unit is conventionally known.
A bobbin conveying system including a fine spinning machine
arranged adjacent to an automatic winder and adapted to fine
spin a yarn, and in which the fine spinning machine and the
15 automatic winder are directly connected with a conveyance
path is also known.
An airflow passing hole that passes through the tray
in an up and down direction is formed in the bobbin conveying
tray (see e.g., Japanese Unexamined Utility Model
20 Publication No. 62-70186). According to such structure,
a yarn end can be unwound from a yarn layer on a suction
airflow generated in a winding tube and further suctioned
into the bobbin (pick finding operation) with the bobbin
inserted in a standing manner on the tray.
25 A tray 1 described in Japanese Unexamined Utility
Model Publication No. 62-70186 includes a yarn passing
inhibiting member 12. The yarn passing inhibiting member
12 is a member arranged in the middle of an airflow passing
hole 7 and adapted to allow the flow of air but inhibit the
30 passing of the yarn. The yarn passing inhibiting member
12 prevents the yarn end from passing through the tray 1
2
and hanging down when carrying out the pick finding
operation mentioned earlier.
This is because in a yarn puling state in which the
yarn end is hung down toward an outer side of a bobbin 10,
5 the yarn end is brought into contact with a conveyor during
the conveyance of the bobbin 10 and the yarn end is wound
around a conveyance mechanism such as a pulley.
The yarn passing inhibiting member is a grid like
metal gauze, a nylon gauze, or a plate board provided with
10 a small hole. When a mesh is a grid like metal gauze, fly
waste may get entangled at net portion of the mesh. In this
case, a merely knitted wire is not fixed and thus moves,
whereby the fly waste attaches during use causing shift in
metal wires in which a warp and a woof shift in the mesh,
15 and hence the fly waste deposition amount increases at such
area thus reducing the flow of air.
BRIEF SUMMARY OF THE INVENTION
It is an object of the present invention to suppress
20 the fly waste from being deposited at the mesh of the bobbin
conveying tray.
This object is achieved by a bobbin conveying tray
according to claim 1.
Hereinafter, a plurality of modes will be described
25 as means for solving the problem. Such modes can be
arbitrarily combined as necessary.
A bobbin conveying tray according to one aspect of
the present invention relates to a bobbin conveying tray
onto which a bobbin with a yarn wound is attachable, and
30 which includes a tray main body and a metal net member. The
tray main body includes a protrusion adapted to be inserted
3
to the bobbin to hold or stand the bobbin, and is formed
with an airflow passing hole that passes through the tray
main body from an upper end to a lower surface. The metal
net member is fixed in the airflow passing hole. Metal
5 wires forming or configuring the net of the net member are
coupled to each other to regulate a movement of the metal
wires at an intersecting position of the metal wires. In
such a tray, the shift of the metal wires does not occur
in the net member, and thus the fly waste is less likely
10 to get entangled, and the deposition of fly waste is less
likely to occur. As a result, the duration of use of the
net member can be extended.
The metal wires may be welded to each other by
sintering. In such a tray, the adhesive strength of the
15 metal wires of the net member enhances. The sintering means
maintaining a metal gauze at a temperature of around a
melting point of the metal for a certain time so that
crystals are formed and are completely integrated across
contacting points of each wire in the metal structure. The
20 shift of the metal wires of the mesh can be prevented without
using a coupling member other than the metal mesh.
The metal wires may be coupled to each other by roll
processing. The roll processing (calendar processing)
means rolling the mesh with a roll device, and the like to
25 deform the intersecting portion of the metal wires so as
to bite into each other, which deformation enhances the
coupling force between the metals. The shift of the metal
wires of the mesh can be prevented without using a coupling
member other than the metal mesh.
30 The tray main body may include a recess adapted to
accommodate the net member. The bobbin conveying tray may
4
further include a fixing bush adapted to fix the net member
in the recess, the fixing bush being press fitted to the
recess. In such a tray, the net member can be fixed to the
recess by simply press fitting the fixing bush to the recess,
5 and hence the fixing and detachment of the net member are
facilitated.
The bobbin conveying tray may further include a
positioning bush arranged on a far side than the net member
in the recess. In such a tray, the location for attaching
10 the net member can be configured by the positioning bush,
and thus the precision of the shape of the recess does not
need to be increased.
The mesh of the net member may allow the passing of
the air but limit the passing of the yarn, and may have a
15 roughness in a range of 50 to 100 meshes. The tray can
effectively prevent the passing of the yarn while allowing
the passing of the air.
The wire diameter of the net member may be in a range
of 0.05 to 0.2 mm. The tray can effectively prevent the
20 passing of the yarn while allowing the passing of the air.
The opening rate of the net member may be in a range
of 30 to 60%. The tray can effectively prevent the passing
of the yarn while allowing the passing of the air.
In the bobbin conveying tray according to the present
25 invention, the fly waste is less likely to deposit on the
mesh.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic plan view of an automatic winder
30 system in which a tray according to one aspect of the present
invention is used.
5
FIG. 2 is a view illustrating an overall
configuration of an automatic winder.
FIG. 3 is a side view of a tray attached with a bobbin.
FIG. 4 is a perspective view of the tray.
5 FIG. 5 is a cross-sectional view of the tray.
FIG. 6 is a side view illustrating a state of preparing
a yarn end by a pick finding device.
FIG. 7 is a partially enlarged view of a net member.
FIG. 8 is a partial cross-sectional view of a tray
10 illustrating an attaching operation of the net member.
FIG. 9 is a partial cross-sectional view of the tray
illustrating the attaching operation of the net member.
FIG. 10 is a partial cross-sectional view of the tray
illustrating the attaching operation of the net member.
15 FIG. 11 is a partial cross-sectional view of the tray
illustrating the attaching operation of the net member.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
20 1. First Embodiment
(1) Automatic winder system
An automatic winder system 101 adopting one
embodiment of the present invention will be described using
FIGS. 1 and 2. FIG. 1 is a schematic plan view of an
25 automatic winder system in which a tray according to one
aspect of the present invention is used. FIG. 2 is a view
illustrating an overall configuration of an automatic
winder. The automatic winder system 101 includes an
automatic winder 102, a bobbin processing device 103, and
30 a bobbin supplying device 104. The automatic winder 102
is arranged on a left side in the figure of the bobbin
6
processing device 103. The bobbin processing device 103
is arranged between the bobbin supplying device 104 and the
automatic winder 102.
As illustrated in FIGS. 1 and 2, the automatic winder
5 102 includes a plurality of winding units 105. The winding
unit 105 is a device adapted to rewind a spun yarn wound
around a threaded bobbin tube 5B (to be described later)
around a different bobbin to manufacture a product package
of the spun yarn. As illustrated in FIG. 1, the automatic
10 winder 102 includes a supplying path 106 adapted to convey
the threaded bobbin tube 5B to each winding unit 105.
Furthermore, a collecting path 107 adapted to convey an
empty bobbin tube 5A discharged from each winding unit 105
is formed in the automatic winder 102. The supplying path
15 106 and the collecting path 107 are configured by a belt
conveyor, and the like, and are adapted to convey the bobbin
tube 5 using a tray (bobbin conveying tray) 3.
The bobbin processing device 103 is a device adapted
to extract the empty bobbin tube 5A (to be described later)
20 discharged by the automatic winder 102 from the tray 3,
attach the threaded bobbin tube (yarn supplying bobbin) 5B
around which a yarn fine spun with a fine spinning machine
(not illustrated) configured by winding a spun yarn
generated in the fine spinning machine (not illustrated)
25 around a periphery of a bobbin main body to the tray 3, and
supply the threaded bobbin tube 5B toward the automatic
winder 102. The bobbin supplying device 104 is a device
adapted to supply the threaded bobbin tube 5B to the bobbin
processing device 103.
30
(2) Tray and bobbin
7
The tray 3 and the bobbin tube 5 will be described
using FIGS. 3 to 5. FIG. 3 is a side view of a tray attached
with a bobbin. FIG. 4 is a perspective view of the tray.
FIG. 5 is a cross-sectional view of the tray. The tray 3
5 is a conveying body used to convey the bobbin tube 5. As
illustrated in FIGS. 3 and 4, the tray 3 includes a circular
disc shaped base portion 3a, and an attaching portion 3b
serving as a circular column shaped bobbin inserting
portion projecting upward from a middle of an upper surface
10 of the base portion. The tray 3 includes an intermediate
circular column portion 3c serving as a bobbin mounting
portion between the base portion 3a and the attaching
portion 3b. The intermediate circular column portion 3c
includes a seating surface 67 where the bobbin tube 5 is
15 seated, and an outer peripheral surface 69. The tray 3
conveys the bobbin tube 5 in an orientation state in which
the bobbin tube 5 is inserted to the attaching portion 3b.
The interior structure of the tray 3 will be described
later.
20 The bobbin tube 5 is a cylindrical member around an
outer peripheral surface of which a spun yarn Y is to be
wound, and a pass-through shaft hole 5a is formed therein
(FIG. 6 ) . When a bottom portion of the bobbin tube 5 is
inserted to the attaching portion 3b of the tray 3, the
25 bobbin tube 5 is set in the tray 3 as illustrated in FIG.
3 and conveyed with the tray 3. In the following
description, the bobbin tube itself around which the spun
yarn Y is not wound is referred to as the empty bobbin tube
5A, and the bobbin tube and the spun yarn Y wound therearound
30 are together referred to as the threaded bobbin tube 5B.
8
(3) Bobbin processing device
The bobbin processing device 103 will be described
using FIG. 1. The bobbin processing device 103 includes
a tray conveyance line 108 as a conveying means of the
5 threaded bobbin and the empty bobbin adapted to convey the
bobbins while being mounted on the tray 3. The tray
conveyance line 108 is connected to the supplying path 106
and the collecting path 107 of the automatic winder 102.
The tray 3 with the threaded bobbin tube 5B attached is
10 supplied from the bobbin processing device 103 to the
winding unit 105 by the tray conveyance line 108 and the
supplying path 106. The tray 3 with the empty bobbin tube
5A attached is returned from the winding unit 105 to the
bobbin processing device 103 by the collecting path 107 and
15 the tray conveyance line 108.
The tray conveyance line 108 includes a main
conveyance line 121 and a return conveyance line 122. The
main conveyance line 121 is a path adapted to convey the
empty bobbin tube 5A discharged from the automatic winder
20 102, replace the empty bobbin tube 5A with the threaded
bobbin tube 5B in the middle, and convey the same toward
the automatic winder 102. The main conveyance line 121 is
schematically formed to a U-shape. A starting end of the
main conveyance line 121 is connected to a terminating end
25 of the collecting path 107, and a terminating end of the
main conveyance line 121 is connected to a starting end of
the supplying path 106. A bobbin extracting device 11 and
a threaded bobbin supplying device 13 are arranged along
the main conveyance line 121.
30 The bobbin extracting device 11 is a device adapted
to extract and collect the empty bobbin tube 5A from the
9
tray 3. The threaded bobbin supplying device 13 is a device
adapted to attach the threaded bobbin tube 5B manufactured
with the fine spinning machine to the tray 3 in a
substantially standing state. The threaded bobbin tube 5B
5 is supplied to the threaded bobbin supplying device 13 by
the bobbin supplying device 104 such as a part feeder, and
the like.
Although not illustrated, the threaded bobbin
supplying device 13 includes a bobbin inserting device, a
10 bobbin allocating device, and a pair of bobbin shoots. The
threaded bobbin supplying device 13 can supply the empty
bobbin tube 5A to the tray 3 simultaneously at two places
with the bobbin allocating device and the pair of bobbin
shoots. Each bobbin shoot sets the bobbin tube 5 so as to
15 be inserted to the attaching portion 3b of the tray 3. The
bobbin shoot includes, for example, each divided half of
which a cone shaped cylindrical body is divided in half in
the axial direction.
In the main conveyance line 121, a bunch unwinding
20 device 15, a yarn end processing device 17, and a pick
finding device 19 are arranged as a bobbin preparing system
at a downstream in the conveying direction of the threaded
bobbin supplying device 13. The bobbin preparing system
carries out the following tasks with respect to the threaded
25 bobbin tube 5B so as to obtain a state in which the yarn
can be smoothly unwound with the automatic winder 102, and
supplies the same to the automatic winder 102. The bunch
unwinding device 15 is a device adapted to remove the bunch
winding of the bottom bunch wound around the threaded bobbin
30 tube 5B.
The yarn end processing device 17 is a device adapted
10
to cut a back wind yarn wound around a yarn layer surface
of the threaded bobbin tube 5B, and remove a tail yarn side
thereof. The pick finding device 19 is a device adapted
to separate and pick find the yarn end from the surface of
5 the threaded bobbin tube 5B, wind the pick found yarn end
around a top portion of the bobbin tube 5, and insert the
same to the shaft hole 5a opening (top hole) of the bobbin
tube 5. Thus, a state in which the relevant yarn end can
be smoothly pulled out from the threaded bobbin tube 5B with
10 the automatic winder 102 is obtained (to be described
later).
The return conveyance line 122 is, for example, a path
adapted to re-process the threaded bobbin tube 5B that
failed in the pick finding process. The return conveyance
15 line 122 is a bypass path connecting the terminating end
and the starting end of the main conveyance line 121. In
the present embodiment, a set of bunch unwinding device 15,
yarn end processing device 17, and pick finding device 19
is also arranged on the return conveyance line 122. The
20 description thereof will be omitted.
(4) Flow of tray
The flow of the tray 3 will be described below using
FIG. 1. When an empty tray 3 reaches a position immediately
25 below the bobbin shoot (not illustrated) of the threaded
bobbin supplying device 13, the threaded bobbin tube 5B is
mounted in a substantially standing state on the empty tray
3.
Next, the tray 3 is conveyed on the main conveyance
30 line 121 toward the bunch unwinding device 15 on the
downstream side. In the bunch unwinding device 15, the
11
bottom bunch formed on the threaded bobbin tube 5B is
removed. Then, the threaded bobbin tube 5B is conveyed on
the main conveyance line 121 toward the yarn end processing
device 17. In the yarn end processing device 17, the back
5 wind yarn wound around the yarn layer surface of the
threaded bobbin tube 5B is cut, and a distal end side winding
portion is formed.
Next, the threaded bobbin tube 5B is conveyed on the
main conveyance line 121 toward the pick finding device 19.
10 In the pick finding device 19, the distal end side winding
portion is sucked toward the upper side, and thereafter,
inserted to the inner side of a tube body of the threaded
bobbin tube 5B. Then, the threaded bobbin tube 5B is
conveyed further downstream on the main conveyance line 121,
15 and supplied to the supplying path 106 of the automatic
winder 102. The threaded bobbin tube 5B is conveyed on the
supplying path 106, and supplied to one of the winding units
105.
In the winding unit 105, the unwinding of the yarn
20 is carried out from the threaded bobbin tube 5B, and the
unwound yarn is wound into a package. The tray 3 with the
empty bobbin tube 5A mounted, all the yarn on the periphery
of which is unwound, is discharged from the winding unit
105, and again returned to the main conveyance line 121 of
25 the bobbin processing device 103 through the collecting
path 107. In the main conveyance line 121, the bobbin
extracting device 11 extracts the empty bobbin tube 5A
mounted on the tray 3.
30 (5) Pick finding device (detailed description)
The pick finding device 19 will be described using
12
FIG. 6. FIG. 6 is a side view illustrating a state of
preparing a yarn end by a pick finding device. As
illustrated in FIG. 6, the pick finding device 19 includes
a yarn suction tube 91, a cutter 92, a yarn suctioning
5 portion 93, and a yarn detection sensor 95. The yarn
suction tube 91 includes an accordion portion that can be
extended and contracted vertically, and is arranged to be
placed over the distal end portion of the threaded bobbin
tube 5B from the upper side by being extended. The yarn
10 suction tube 91 is connected to a negative pressure
supplying device 99 by way of a piping 97 so as to be able
to suck the distal end side winding portion. The cutter
92 capable of cutting the spun yarn Y is arranged at a
connecting portion of the yarn suction tube 91 and the
15 piping 97. Furthermore, the yarn detection sensor 95 is
arranged on the piping 97. The yarn detection sensor 95
can detect whether or not the catching of the spun yarn Y
is successful by detecting the spun yarn Y.
The yarn suctioning portion 93 is configured as a
20 pipe-shaped member connected to the negative pressure
supplying device 99, the one end of which being formed with
a suction port 93a opened upward to face the lower surface
of the tray 3 supporting the threaded bobbin tube 5B. Since
a vertical airflow passing hole 35 (to be described later)
25 is formed in the tray 3, suction flow can be generated at
an upper end portion of the shaft hole 5a of the threaded
bobbin tube 5B by sucking the air from the yarn suctioning
portion 93.
When the threaded bobbin tube 5B is conveyed, the pick
30 finding device 19 extends the accordion portion of the yarn
suction tube 91 to cover the yarn winding portion of the
13
threaded bobbin tube 5B and generates the suction airflow
in the tube of the yarn suction tube 91, thus sucking the
distal end side winding portion of the threaded bobbin tube
5B and catching the yarn end.
5 When the success in the catching of the yarn end is
detected by the yarn detection sensor 95, the pick finding
device 19 contracts the accordion portion of the yarn
suction tube 91, and then operates the cutter 92 to cut the
spun yarn Y. Then, the suction airflow is generated at the
10 airflow passing hole 35 of the tray 3 and the shaft hole
5a of the threaded bobbin tube 5B to suck and catch the yarn
end from the upper end of the shaft hole 5a of the threaded
bobbin tube 5B by the yarn suctioning portion 93. The
preparation can be made so as to obtain a state in which
15 the yarn end is inserted from the upper side to the interior
of the threaded bobbin tube 5B.
Thereafter, the threaded bobbin tube 5B is supplied
for the winding operation in the automatic winder 102. Thus,
in the automatic winder 102, compressed air is introduced
20 from a hole on the root portion side of the threaded bobbin
tube 5B prepared by the pick finding device 19 to easily
blow away the yarn end in the tube of the threaded bobbin
tube 5B toward the upper side, catch the yarn end by a yarn
catching section (not illustrated) on the upper side, and
25 join the yarn end by a yarn joining device to be wound into
a package. As a result, the winding operation of the spun
yarn Y by the automatic winder 102 can be smoothly started.
(6) Interior structure of tray
30 An interior structure of the tray 3 will be described
using FIG. 5. The tray 3 is a member to where the threaded
14
bobbin tube 5B with the spun yarn Y wound is attached, and
includes a tray main body 31 and a metal net member 33. As
described earlier, the tray main body 31 includes the
attaching portion 3b (one example of protrusion) inserted
5 into the threaded bobbin tube 5B to stand the threaded
bobbin tube 5B. The airflow passing hole 35 passing through
from the upper end to the lower surface is formed in the
tray main body 31. Specifically, the airflow passing hole
35 is passed through the base portion 3a and the attaching
10 portion 3b.
The net member 33 is fixed in the airflow passing hole
35, and allows the passing of the air but limits the passing
of the yarn. Specifically, the net member 33 is circular
in plan view. In FIG. 7, the metal wires configuring the
15 net of the net member 33 are coupled to each other to regulate
the movement of the metal wires at an intersecting position
of the metal wires. FIG. 7 is a partially enlarged view
of a net member. When the yarn end pick found by the pick
finding device 19 is inserted to the top hole of the bobbin
20 tube 5, the yarn end will not pass through the tray 3 and
run out to the lower side even if the yarn end is moved toward
the lower side through the airflow passing hole 35 of the
tray main body 31 by the net member 33.
In the tray 3, shift of the metal wires does not occur
25 in the net member 33, and thus the fly waste is less likely
to get entangled, and the deposition of fly waste is less
likely to occur. As a result, the duration of use of the
net member 33 can be extended.
Specifically, the metal wires are welded to each
30 other by sintering. Therefore, the adhesive strength of
the metal wires of the net member 33 enhances.
15
The tray main body 31 includes a recess 37 adapted
to accommodate the net member 33. Specifically, the
airflow passing hole 35 includes a larger diameter part 35a
on the base portion 3a side and a smaller diameter part 35b
5 on the attaching portion 3b side, where the larger diameter
part 35a is the recess 37. A step part 35c is formed at
the boundary of the larger diameter part 35a and the smaller
diameter part 35b.
The tray 3 includes a fixing bush 39. The fixing bush
10 39 is a member adapted to fix the net member 33 to the recess
37 by being press fitted into the recess 37. The fixing
bush 39 is made of an elastically deformable material, and
includes a flat upper surface and lower surface.
Specifically, the fixing bush 39 fixes the net member 33
15 supported at the step portion 35c to the step portion 35c.
As the net member 33 can be fixed to the recess 37 by simply
press fitting the fixing bush 39 to the recess 3 7 , the fixing
and detachment of the net member 33 are facilitated.
The tray 3 includes a positioning bush 41. The
20 positioning bush 41 is arranged on the far side than the
net member 33 in the recess 37. The positioning bush 41
is made of an elastically deformable material, and includes
a flat upper surface and lower surface. Specifically, the
positioning bush 41 is arranged so as to make contact with
25 the step portion 35c, and realizes a plane for receiving
the net member 33. As the location for attaching the net
member 33 can be configured by the positioning bush 41, the
precision of the shape of the recess 37 does not need to
be increased.
30 The net member 33 is, for example, made of stainless
steel. However, the type of metal is not limited. The mesh
16
roughness of the net member 33 is in a range of 50 to 100
meshes, and allows the passing of the air but limits the
passing of the yarn. The wire diameter of the net member
33 is in a range of 0.05 to 0.2 mm. The opening rate of
5 the net member 33 is in a range of 30 to 50%. The tray 3
can effectively prevent the passing of the yarn while
allowing the passing of the air.
(7) Attaching operation of net member
10 The operation of attaching the net member 33 to the
tray main body 31 will be described using FIGS. 8 to 11.
First, the tray main body 31 is prepared, as illustrated
in FIG. 8. Next, the positioning bush 41 is attached in
the recess 3 7 , as illustrated in FIG. 9. Specifically, the
15 positioning bush 41 is arranged on the step portion 35c of
the recess 37.
Then, the net member 33 is mounted on the positioning
bush 41 in the recess 37, as illustrated in FIG. 10.
Specifically, an outer peripheral edge portion of the net
20 member 33 is mounted on a circumferential plane of the
positioning bush 41. Finally, as illustrated in FIG. 11,
the fixing bush 39 is press fitted into the recess 37 to
fix the net member 33 to the recess 37. Specifically, the
fixing bush 39 is arranged on the step portion 35c of the
25 recess 37. As a result, the fixing bush 39 sandwiches the
outer peripheral edge portion of the net member 33 with the
positioning bush 41. The operation of detaching the net
member 33 is carried out in the reverse order.
30 2. Features of embodiment
The above described embodiment can be described as
17
below. The bobbin conveying tray (e.g., tray 3) is a bobbin
conveying tray (e.g., tray 3) to where the bobbin (e.g.,
threaded bobbin tube 5B) with the yarn wound (e.g., spun
yarn Y) is attached, and includes the tray main body (e.g.,
5 tray main body 31) and the metal net member (e.g., metal
net member 33). The tray main body includes a protrusion
(e.g., attaching portion 3b) inserted into the bobbin to
stand the bobbin, and is formed with the airflow passing
hole (e.g., airflow passing hole 35) that passes through
10 from the upper end to the lower surface. The metal net
member is fixed in the airflow passing hole, and allows the
passing of the air but limits the passing of the yarn. The
metal wires configuring the net of the net member are
closely attached to each other so that shift between the
15 metal wires does not occur. In such tray, the shift of the
metal wires does not occur in the net member, and thus the
fly waste is less likely to get entangled, and the
deposition of fly waste is less likely to occur. As a result,
the duration of use of the net member can be extended.
20
3. Other embodiments
One embodiment of the present invention has been
described above, but the present invention is not limited
to such embodiment, and various modifications can be made
25 within a scope not deviating from the gist of the invention.
In particular, a plurality of embodiments and alternative
embodiments described in the present specification can be
arbitrarily combined, as necessary.
The position at which the net member is fixed to the
30 airflow passing hole of the tray main body is not limited
to that in the embodiment described above. The net member
18
may be arranged at a tray distal end or a tray body portion.
A means for fixing the net member to the tray main body is
not limited to a ring-shaped bush. Other means such as
adherence may be adopted. The positioning bush 41 may be
5 omitted. Instead of welding the metal wires to each other
by sintering, roll processing (calendar processing) may be
carried out by a roll device, and the like to roll the metal
wires and deform the metal wires so that the intersecting
portion of the metal wires bite into each other. This
10 deformation enhances the coupling force between the metals,
and hence the shift of the metal wires of the mesh can be
prevented without using a coupling member other than the
metal mesh.
The present invention is widely applied to the bobbin
15 conveying tray.

WE CLAIM
1. A bobbin conveying tray (3) onto which a bobbin
(5, 5A, 5B) with a yarn wound is attachable, the bobbin
5 conveying tray (3) comprising:
a tray main body (31) including a protrusion (3b)
adapted to be inserted to the bobbin (5, 5A, 5B) to hold
the bobbin (5, 5A, 5 B ) , and being formed with an airflow
passing hole (35) that passes through the tray main body
10 (31) from an upper end to a lower surface; and
a net member (33) made of metal and fixed in the
airflow passing hole (35); wherein
metal wires forming the net of the net member (33)
are coupled to each other to regulate a movement of the metal
15 wires at an intersecting position of the metal wires.
2. The bobbin conveying tray (3) according to claim
1, wherein the metal wires are welded to each other by
sintering.
20
3. The bobbin conveying tray (3) according to claim
1, wherein the metal wires are coupled to each other by roll
processing.
25 4. The bobbin conveying tray (3) according to any
one of claims 1 to 3, wherein
the tray main body (31) includes a recess (37) adapted
to accommodate the net member (33); and
the bobbin conveying tray (3) further comprises a
30 fixing bush (39) adapted to fix the net member (33) in the
recess (37), the fixing bush (39) being press fitted to the
20
recess (37).
5. The bobbin conveying tray (3) according to claim
4, further comprising a positioning bush (41) arranged in
5 the recess (37) and adapted to determine a fixing position
of the net member (33) and the fixing bush (39).
6. The bobbin conveying tray (3) according to any
one of claims 1 to 5, wherein the mesh of the net member
10 (33) allows passing of the air but limits passing of the
yarn, and has a roughness in a range of 50 to 100 meshes.
7. The bobbin conveying tray (3) according to any
one of claims 1 to 6, wherein a wire diameter of the net
15 member (33) is in a range of 0.05 to 0.2 mm.
8. The bobbin conveying tray (3) according to any
one of claims 1 to 7, wherein an opening rate of the net
member (33) is in a range of 30 to 60%.