CRANE VEHICLE
CROSS REFERENCE TO RELATED APPLICATIONS
[0001]
This application claims priority of Japanese Patent
Application No. 2011-122282 filed on May 31, 2011. The contents
of this application are incorporated herein by reference in their
entirety.
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0002]
The present invention relates to a crane vehicle, and more
particularly, to a crane vehicle being capable of moving while
suspending goods.
2. Description of the Related Art
[0003]
Conventionally, as shown in Fig. 3, there has been known a
pick-and-carry crane 900 including: a front frame 910 having a front
axle 913 with wheels 93a in the left and the right and a telescopic
boom 911 having the distal end from which a hook is suspended; and
a rear frame 920 having a rear axle 923 with wheels 93b in the left
and the right and a driver' s cab 921 provided therein with a driver' s
seat 925 on which the driver performs driving operation and crane
operation. In the illustrated example, a derricking cylinder 917

is provided between the front axle 913 and the telescopic boom 911,
and thereby, the telescopic boom 911 enables derricking movement.
Such a pick-and-carry crane 900 often moves while suspending goods.
However, in this case, the goods may sway due to the vibration and
the like. Particularly, in a case where the goods are suspended
by a fixed hook provided near the intermediate of the telescopic
boom, the goods may interfere with the derricking cylinder due to
sway of the goods. Therefore, in order to prevent such interference,
a protection member needs to be provided in front of the derricking
cylinder.
[0004]
In this regard, for example, Japanese Examined Patent
Publication No. H01-24651 (hereinafter, referred to as "Patent
Document 1") discloses a configuration of a container transport
vehicle that includes: wheels loaded on a pair of axles; a lift
device installed in the transport vehicle to lift a container placed
on the ground; and a device for vertically moving one end of the
transport vehicle between the container and the wheel close to the
container such that the one end of the transport vehicle adjacent
to the container is fixed on the ground while the container is lifted
and it is placed on a transportation position relative to the
transport vehicle. The transport vehicle is provided with a
container stand on which the container can be placed. Certainly,
with such a transport vehicle, the transport vehicle can move while
the container is placed on the transport vehicle, there may be no
need to worry about sway of the goods during movement.

[0005]
However, in the container transport vehicle having a
configuration disclosed in Patent Document 1, a hydraulic cylinder
is only placed between the driver' s cab and the position where the
container is placed. For example, in a case where the container
strongly sways due to the vibration and the like while the container
is placed on the transport vehicle, the container may interfere
with the hydraulic cylinder or the driver's cab.
[0006]
Therefore, the present invention has been achieved in view
of the above-described circumstances, and an object thereof is to
provide a crane vehicle being capable of moving goods safely by
addressing at least one of the aforementioned problems.
[0007]
To solve the above-described problems, in the invention
according to claim 1, there is provided a crane vehicle including:
a first frame having a first axle with wheels in a left and a right
and a telescopic boom provided for derricking movement by a
derricking cylinder; and a second frame having a second axle with
wheels in a left and a right and a driver's cab. The first frame
and the second frame are connected to one another to be relatively
bendable in a horizontal direction about an articulate pin provided
in a vertical direction. The first frame includes: an inclined part
downwardly inclined from a derricking support of the telescopic
boom toward the first axle side; and a deck part provided above

the first axle.
[0008]
In the invention according to claim 2, the telescopic boom
is provided as close as possible to the driver's cab at a position
where the telescopic boom does not interfere with the driver' s cab.
[0009]
In the invention according to claim 3, the derricking cylinder
of the telescopic boom has one end being pivoted by the inclined
part and the other end being pivoted by the telescopic boom.
[0010]
In the invention according to claim 4, the deck is provided
below a pivotally supporting position of the derricking cylinder
in the inclined part.
[0011]
According to the present invention, for example, even when
the container strongly sways due to the vibration and the like while
the container is placed on the transport vehicle, the driver's cab
is protected by the inclined part. Therefore, it is possible to
move goods safely.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012]
Fig. 1 is a schematic side view illustrating a crane vehicle
according to one embodiment of the present invention;
Fig. 2A is a schematic diagram illustrating a state in which
the crane vehicle according to one embodiment of the present

invention runs;
Fig. 2B is a schematic diagram illustrating a state that the
crane vehicle according to one embodiment of the present invention
runs; and
Fig. 3 is a schematic side view illustrating a crane vehicle
of the conventional example.
DETAILED DESCRIPTION
[0013]
Hereinafter, an embodiment of the present invention will be
specifically described with reference to the drawings. Here, the
same components are assigned the same reference numerals, and
overlapping descriptions will be omitted. As shown in Fig. 1, a
crane vehicle 1 includes: a first frame 10 having a first axle 13
with wheels 3a in the left and the right and a telescopic boom 11
having a distal end from which a hook (not shown) is suspended;
and a second frame 20 having a second axle 23 with wheels 3b in
the left and the right and a driver's cab 21 in which the driver
performs driving operation and crane operation. In addition, the
first frame 10 and the second frame 20 are connected to be relatively
bendable in the horizontal direction about an articulate pin
(indicated by a rotation center 34 of Fig. 1) as a rotation axis
provided in the vertical direction. It should be noted that for
the sake of convenience, unless otherwise specified, the following
description will be made by assuming that the first frame 10 side
refers to the "front", and the second frame 20 side refers to the

"rear".
[0014]
The first frame 10 includes: a lower frame 10a which has a
first axle 13 in one end side (front side) and a connection part
(articulate pin) for connecting to the second frame 20 in the other
end side (rear side) and extends in a front-rear direction
(horizontal direction in Fig. 1) ; and an inclined part 10b provided
to incline toward the other end side (first axle 13 side) of the
lower frame 10a by using the upper side of the connection part of
the lower frame 10a as an upper end. As a result, the lower frame
10a and the inclined part 10b are integrated as a single body in
the front side of the first frame 10, and the lower frame 10a and
the inclined part 10b are provided to overlap one another with
predetermined space in the upper and lower sides in the rear side
thereof. In the illustrated example, since the lower end of the
inclined part 10b is arranged to deviate to the rear side (second
frame 20 side) from the position of the first axle 13, a
predetermined gap (space) is provided between the first axle 13
and the inclined part 10b.
[0015]
A multistage telescopic boom 11 is pivoted at the upper end
of the inclined part 10b for derricking movement. In addition, the
telescopic boom 11 in the illustrated example is provided with a
winch 12 protruded in the rear end, where a wire rope (not shown)
is wound, and the hook (not shown) engaging the wire rope in the
distal end of the telescopic boom 11 can vertically move by winding
and unwinding the wire rope using the winch 12. In addition, in

the telescopic boom 11, a derricking cylinder 17 is provided between
the approximately intermediate position of the anchor boom 11a
pivoted by the inclined part 10b and a predetermined higher position
than the intermediate of the inclined part 10b in a vertical
direction. The entire telescopic boom 11 can be operated to derrick
by expanding and contracting the derricking cylinder 17. It is
noted that since the derricking cylinder 17 is provided in a higher
position than the intermediate of the inclined part 10b in the
vertical direction (in the telescopic boom 11 side) , it is possible
to obtain predetermined space in the front side of the inclined
part 10b and shorten the length of the derricking cylinder 17. For
this reason, in the illustrated example, in comparison with a case
where a long cylinder is employed, it is possible to increase the
strength of the derricking cylinder 17. Therefore, only a single
derricking cylinder 17 is arranged. Of course, the number of the
derricking cylinders 17 is not limited to one.
[0016]
The telescopic boom 11 is provided as close as possible to
the driver's cab 21 at a position within a range in which the
telescopic boom 11 (the winch 12 of the telescopic boom 11 in the
illustrated example) does not interfere with the driver's cab 21
due to the derricking movement. In the embodiment, the derricking
support 31 (pivotally supporting position) of the telescopic boom
11 is provided in the upper end of the inclined part 10b, and the
position of the derricking support is approximately immediately
above the articulate pin. In this case, the winch 12 protruded at
the rear end of the telescopic boom 11 moves such that it draws

a circular orbit 32 as seen in the side view in the rear end about
the derricking support 31, depending on the derricking movement
of the telescopic boom 11. For this reason, the driver's cab 21
and the telescopic boom 11 are spaced with a predetermined gap (in
the embodiment, a distance from the derricking support to the outer
edge of the winch 12) so that the driver's cab 21 and the telescopic
boom 11 do not interfere with one another. In addition, if the gap
between the driver's cab 21 and the telescopic boom 11 is too large
beyond necessity, the distance from the driver' s cab 21 to the distal
end of the telescopic boom 11 may be lengthened. As a result, the
operability for driving may be degraded when the crane vehicle 1
moves by setting the first frame 10 side as a forward movement
direction. Therefore, it is preferable to provide the telescopic
boom 11 as close as possible to the driver's cab 21 at a position
within a range in which the driver's cab 21 and the telescopic boom
11 do not interfere with one another. In the embodiment, since the
telescopic boom 11 is a multistage telescopic boom having, for
example, 6 stages, the length of the telescopic boom 11 in a
retracted state is shortened, and a distance from the driver's cab
21 to the distal end of the telescopic boom 11 is not lengthened.
[0017]
Above the first axle 13, the first frame 10 is provided with
a deck 19 for placing thereon the goods 50a lifted by the crane
or supporting part of the lifted goods 50b. The deck 19 in the
illustrated example is fixed to a support part (not shown) upwardly
protruded from the position where the first axle 13 is provided
in the first frame 10, and therefore is supported. Also the deck

19 is fixed below the pivotally supporting position 33 in the
derricking cylinder 17 of the inclined part 10b, and therefore is
supported. As a result, the deck 19 is provided at the position
lower than the derricking cylinder 17 and higher than the first
axle 13. For this reason, in a case where the goods 50a (refer to
Fig. 2A) is placed on the deck, or part of the goods 50b (refer
to Fig. 2B) is supported by the deck, it is possible to prevent
the derricking cylinder 17 and the goods 50a or 50b from interfering
with one another. It should be noted that the one end side of the
deck 19 does not always need to be fixed to the inclined part 10b,
and, for example, if another support part is provided in addition
to the support portion provided at the position of the first axle
13, the deck 19 may be installed with a distance from the inclined
part 10b. Although the deck 19 in the illustrated example is
provided with bars upwardly protruding, which are arranged in the
horizontal direction, the invention is not limited to this.
[0018]
The second frame 20 includes a lower frame 20a extending in
the front-rear direction (horizontal direction in Fig. 1) and a
longitudinal frame 20b provided in the front side of the lower frame
20a. The lower frame 20a includes a second axle 23 with driving
wheels 3b in the rear side, and an engine E for driving the wheels
3b and a hydraulic actuator such as the derricking cylinder 17 and
the winch in the front side. In addition, the longitudinal frame
20b is provided to upwardly extend to surround the engine E in the
front side of the lower frame 20a and has a connection part
(articulate pin) for connecting to the first frame 10. The

longitudinal frame 20b in the illustrated example has an
approximately triangular pole shape, which is a triangular shape
obtained by setting the upper end as a single vertex and setting
the lower end as a single side, as seen in the side view. The upper
end pivotably rotates with respect to the upper end of the inclined
part 10b in the first frame 10, meanwhile the lower end pivotably
rotates with respect to the lower frame 10a of the first frame 10.
The center of each pivot serves as a connection part for connecting
to the first frame 10. In the second frame 20 having the lower frame
20a and the longitudinal frame 20b, a driver's cab 21 is provided
above the second axle 23, in which the driver performs crane
operation and driving operation.
[0019]
Inside the driver's cab 21, a seat 25 on which a driver who
performs crane operation and driving operation sits, is provided.
The seat 25 is reversible in two directions including the first
frame 10 side (front side) and the opposite side (rear side). As
shown in Fig. 1, if the front face of the seat 25 faces the opposite
side to the first frame 10 side, only driving operation is allowable.
Meanwhile as shown in Figs. 2A and 2B, if the front face of the
seat 25 faces the first frame 10 side, both driving operation and
crane operation are allowable.
[0020]
In the illustrated example, a steering wheel 26 (parts other
than the steering wheel are not illustrated) for performing driving
operation and a handlebar 27 for performing crane operation, are
provided as a first operation part in the front side (first frame

10 side) of the driver's cab 21. For example, when a sensor and
the like detects that the seat 25 is fixedly oriented to the front
face, various kinds of operation can be performed using the first
operation part (including the steering wheel 26, the handlebar 27,
and the like). Meanwhile, in the rear side (opposite side to the
first frame 10) of the driver's cab 21, a steering wheel 28 (parts
other than the steering wheel are not illustrated) is provided as
a second operation part for performing driving operation. For
example, when a sensor and the like detects that the rear side of
the seat 25 is fixedly oriented to the front face, driving operation
can be performed using the second operation part (including the
steering wheel 28 and the like).
[0021]
With this configuration, for example, when the crane vehicle
1 runs at a certain high speed on a public road and the like, the
front face of the seat 25 is fixedly oriented to the rear side as
shown in Fig. 1, and driving operation of the crane vehicle 1 is
performed by the second manipulation part by setting the second
frame 20 side (rear side) as a forward movement direction. Then,
in order to move predetermined goods, the front face of the seat
25 is fixedly oriented to the front side as shown in Figs. 2A and
2B, and the crane is operated with the first operation part by
setting the first frame 10 side as a forward movement direction,
so that the goods can be suspended by the crane. In this state,
using the crane, the goods 50a is placed on the deck 19 as shown
in Fig. 2A, or part of the goods 50b is supported by the deck 19
as shown in Fig. 2B. In this manner, since the forward movement

direction can be conveniently changed only by reversing the seat
25, it is possible to set the second frame 20 side as the forward
movement direction to move the crane vehicle 1, and the telescopic
boom 11 or the goods is not placed in the forward movement direction,
so that a clear view can be obtained. In this case, since the first
operation part for performing crane operation is not operated, it
is possible to avoid erroneous operation of the crane.
[0022]
Although the embodiment of the present invention has been
described in detail with reference to the accompanying drawings,
the detailed configuration is not limited to the embodiment. The
present invention may include modifications in design or the like
without departing from the spirit and scope of the invention.
[0023]
For example, although a configuration has been shown for an
example where in the driver's cab, the first operation part for
performing driving operation and crane operation is provided in
the front side, and the second operation part for performing driving
operation is provided in the rear side, the invention is not limited
to this. Another configuration is possible as long as the seat is
reversible; driving operation and crane operation can be performed
when the front face of the seat is oriented to the front side; and
only driving operation can be performed when the front face of the
seat is oriented to the rear side. For example, the following
configuration is possible: an operation part for driving operation
and crane operation is provided in the center of the driver's cab,
and the seat is reversed while rotating about the operation part.

In this case, the operation part is controlled not to perform crane
operation when the front face of the seat is oriented to the rear
side. In addition, for example, in the first operation part
provided in the front side of the driver's cab, the steering wheel
for performing driving operation may be exchanged with a handlebar
being capable of similar driving operation.
[0024]
Moreover, a configuration has been shown where the first
operation part can be used when a sensor and the like detects that
the seat is oriented to the front side, and, on the other hand,
the second operation part can be used when the sensor or the like
detects that the seat is oriented to the rear side. However, the
present invention is not limited to the configuration. The PTO for
extracting engine power is turned on when the first operation part
performs crane operation with the seat being oriented to the front
side, and, on the other hand, the PTO is turned off when the second
operation part performs driving operation with the seat being
oriented to the rear side. Therefore, for example, the orientation
of the seat may be determined based on ON/OFF of the PTO. In this
case, it is possible to perform driving operation and crane
operation using the first operation part when the PTO is turned
on, and, on the other hand, it is possible to perform driving
operation using the second operation part when the PTO is turned
off.
[0025]
Although a configuration has been shown where the forward
movement direction of the crane vehicle can be changed by reversing

the seat, the present invention is not limited to this . For example,
the seat may be fixed so that the front face of the seat is oriented
to the first frame side (front side). In this case, there is no
need of providing the second operation part in the rear side of
the driver' s cab, and the rear side is not set as the forward movement
direction.

CLAIMS
1. A crane vehicle comprising:
a first frame having a first axle with wheels in a left and
a right and a telescopic boom provided for derricking movement by
a derricking cylinder; and
a second frame having a second axle with wheels in a left and
a right and a driver's cab, wherein:
the first frame and the second frame are connected to one
another to be relatively bendable in a horizontal direction about
an articulate pin provided in a vertical direction; and
the first frame includes:
an inclined part downwardly inclined from a derricking
support of the telescopic boom toward the first axle side; and
a deck part provided above the first axle.
2. The crane vehicle according to claim 1, wherein
the telescopic boom is provided as close as possible to the
driver's cab at a position where the telescopic boom does not
interfere with the driver's cab.
3. The crane vehicle according to one of claim 1 and claim 2, wherein
the derricking cylinder of the telescopic boom has one end
being pivoted by the inclined part and the other end being pivoted
by the telescopic boom.
4. The crane vehicle according to claim 3, wherein

the deck is provided below a pivotally supporting position
of the derricking cylinder in the inclined part .

To provide a crane vehicle being capable of moving safely.
A crane vehicle 1 is provided with: a first frame 10 having a first
axle 13 with wheels 3a in the left and the right and an telescopic
boom 11 provided for derricking movement by the derricking cylinder
17; and a second frame 20 having a second axle 23 with wheels 3b
in the left and the right and a driver's cab 21, in which the first
frame 10 and the second frame 20 being connected to be relatively
bendable in a horizontal direction about an articulate pin provided
in a vertical direction, wherein the first frame 10 includes an
inclined part 10c downwardly inclined from a derricking support
of the telescopic boom 11 to the first axle 13 side, and a deck
part 19 provided above the first axle 13.