SPECIFICATION [TITLE OF THE INVENTION] PASSENGER CONVEYER
[FIELD OF THE INVENTION]
The present invention relates to a passenger conveyer such as an escalator and a motor driven moving walk and in particular, relates to a passenger conveyer with a devised frame body.
[BACKGROUND ART]
Usually, a frame body of a passenger conveyer is formed in a truss structure in which side frame bodies constituted by coupling between an upper chord and a lower chord with vertical members and diagonal members are disposed in right and left and these right and left side frame bodies are coupled by lateral beam members. However, in a frame body of truss structure, since many members and parts thereof are coupled by welding, the coupling members are likely to be deformed due to welding heat and thus many time and labor were spent for correcting such deformation.
Until now, in order to suppress such deformation due to welding heat while limiting number of welding spots, for example, as shown in Fig. 5 in patent document

1, a measure is known in which side frame bodies are formed with steel plates and are coupled by welding lateral beam members thereto. [Patent Document 1] JP(U)-B-58-42373
[SUMMARY OF THE INVENTION]
[TASKS TO BE SOLVED BY THE INVENTION]
According to the constitution as disclosed in the above patent document 1, although the number of welding spots decreases, however, since many spots coupled by welding still remain, the parts are deformed due to welding heat, and further, it was necessary to spend many time and labor for the correction work of such deformation.
Moreover, when performing a disassembling work of the frame body at the time of renewal, these welded spots have to be disassembled by melting such as by making use of a gas burner. Accordingly, when there are many coupling spots made by welding, a great many renewal work time is required, and as well as because of the melting work with the gas burner, the load to environment was significant.
An object of the present invention is to provide a passenger conveyer which limits the number of welded spots when assembling a frame body and facilitates

disassembling of the frame body even when performing disassembling at the time of renewal. [MEASURE FOR SOLVING THE TASKS]
In order to achieve the above object, in a passenger conveyer including a frame body installed in a building structure and a constitutional member installed in the frame body according to the present invention, the frame body is constituted by a cross sectionally U shaped member that is formed by bending a plate member so as to have right and left opposing side plates with an interval and a bottom plate coupling the bottom portions of these side plates and with a lateral beam member of which both ends are fixed to the right and left side plates, and fixing between said cross sectionally U shaped member and said lateral beam member are performed by screw fastening.
Through the use of the cross sectionally U shaped member formed by bending a plate member as referred to above, a frame body of truss structure that is formed by coupling such as vertical members and diagonal members between an upper chord and a lower chord by welding can be omitted, further, through coupling of lateral beam members to the right and left side plates in the cross sectionally U shaped member by screw fastening, the frame body can be assembled without using

welding. As a result, at the time of disassembling the frame body, since the frame body can be easily disassembled only by unscrewing without loading to environment, work time for the renewal can also be shortened.
Other than the features as explained above, the present invention proposes a structure that can further reduces number of welded spots, of which details will be explained in the explanation of an embodiment that follows. [ADVANTAGES OF THE INVENTION]
According to the present invention as has been explained above, a passenger conveyer can be obtained which limits the number of welded spots when assembling a frame body and further, facilitates disassembling of the frame body even when performing disassembling at the time of renewal.
[DESCRIPTION OF THE PREFERRED EMBODIMENTS]
Herein below, an embodiment of a passenger
conveyer according to the present invention will be
explained with reference to an embodiment of an
escalator as shown in Fig.l~Fig.4.
As shown in Fig.l, an escalator 1 includes a frame
body 2 bridged between an up stair floor US and a down

stair floor DS in a building structure, getting on and off platforms 3A and 3B disposed at both ends in longitudinal direction of the frame body 2, a plurality of steps 4 disposed in the frame body 2 that are coupled endlessly between the getting on and off platforms 3A and 3B so as to be moved cyclically, a driving device 5 disposed in the frame body 2 so as to drive the plurality of steps 4 cyclically, a right and left balustrade 6A and 6B disposed upright on the body frame 2 while opposing each other at both sides in width direction of the steps 4 and moving handrails 7 that are guided and moved along the circumferential edges of the balustrades 6A and 6B in synchronism with the moving velocity of the steps 4.
In a case of a special escalator that is installed between up and down stair floors with a short height, the frame body 2 in its entire length can be continuously constituted without dividing the same, however, in a case of usual standard escalator, in view of transportation thereof and carry-in thereof into a building structure, the frame body 2 is divided in plural, such as an upper horizontal frame body 2A, intermediate inclining frame bodies 2B and 2C and a lower horizontal frame body 2D. Then, the adjacent upper horizontal frame body 2A and intermediate inclining

frame body 2B, intermediate inclining frame bodies 2B and 2C and intermediate inclining frame body 2C and lower horizontal frame body 2D are respectively coupled by coupling members 8A~8C.
Now, since the basic structure of the respective divided frame bodies 2A-2D are substantially the same, herein, the frame body structure of the intermediate inclining frame body 2C will be explained with reference to Fig.2.
A cross sectionally U shaped member unit constituting the intermediate inclining frame body 2C includes a cross sectionally U shaped member having spaced apart opposing right and left side plates 9A and 9B and a bottom plate 9C coupling the lower end portions of these side plates 9A and 9B that are formed by bending a plate member and lateral beam members 11 coupled to the side plates 9A and 9B while stretching therebetween for keeping the opposing interval between the side plates 9A and 9B of the cross sectionally U shaped member.
At the upper end portions of the right and left side plates 9A and 9B, upper face portions 10A and 10B that are formed by bending the same in each of the opposing directions, and the upper face portions 10A and 10B are utilized such as a strengthening member and

a seat for attaching constitutional parts.
Further, the lateral beam member 11 is formed by bending a plate member in cross sectionally L shape, and is fixed to the right and left side plates 9A and 9B by screw fastening while making use of a space between the steps 4A for outward side and the steps 4B for return side. Still further, even to the bottom plate 9C of the cross sectionally U shaped member, a lateral beam member 12 formed by bending a plate member in cross sectionally L shape is fixed by screw fastening as a reinforcing member.
In the drawing, an element 20 showing with a bolt and a nut shows a screw fastening portion.
On the other hand, on each of the opposing plate faces of the right and left side plates 9A and 9B, track supporting members 13A and 13B formed by plate members are screw fastened along the height direction of the side plates. A perspective view of the track supporting member 13A at right side is shown in Fig.3. Attachment faces 21A~28A for screw fastening are formed by bending the plate member, and the screw fastening is effected by inserting bolts into holes formed at the attachment faces 21A~28A and by fastening the same. Further, although an illustration is omitted, the track supporting member 13B also includes attachment faces

21B~28B for screw fastening that are formed in a symmetric manner with respect to Fig.3.
Thereby, after closely contacting the attachment face 27A (27B) , 26A (26B) and 28A (28B) provided at the track supporting member 13A (13B) to the upper face portion 10A (10B) , the side plate 9A (9B) and the bottom plate 9C, the track supporting member 13A (13B) is respectively fixed by screw fastening. Further, the lateral beam member 11 is screw fastened by making use of coupling holes 29A (29B) provided at the track supporting member 13A.
On the other hand, escalator constitutional parts in the frame body are also fixed by screw fastening by making use of such as the attachment faces 21A (21B) ~25A (25B) . As shown in Fig. 2, an outward side track 14A for guiding a front wheel 4F and a rear wheel 4R of the outward side step 4A is screw fastened to the attachment face 22A, a return side track 15A for guiding a rear wheel 4R of the return side step 4B is screw fastened at the attachment face 23A and a return side track 19A for guiding a front wheel 4F of the return side step 4B is screw fastened at the attachment face 24A. Further, at a higher position than the attachment face 22A of the track supporting member 13A, an attachment face 21A for fixing a skirt guard 16 by screw fastening is also

formed by bending the same.
The above structure is likely applied to the track supporting member 13B at the left side.
Further, on the upper face portions 10A and 10B of the cross sectionally U shaped member, brackets 16A and 16B are respectively supported by screw fastening, by making use of these brackets 16A and 16B the balustrades 6A and 6B are fixed as well as inner deck covers 17A and 17B and outer deck covers 18A and 18B that cover a lower portion of the balustrades 6A and 6B are fixed by screw fastening. The upper end of the skirt guard 16 is also fixed to these brackets 16A and 16B by screw fastening.
Further, at a lower portion of the track support members 13A and 13B, the attachment faces 25A and 25B are formed by bending the same, and at the attachment faces 25A and 25B, an oil pan 19, of which bottom portion is supported by the lateral beam member 12 disposed on the bottom plate 9C, is fixed by screw fastening.
The structure of the intermediate inclining frame body (cross sectionally U shaped member unit) 2C as explained above is applied to the upper horizontal frame body 2A, the intermediate inclining frame body 2B and the lower horizontal frame body 2D.
Then, the coupling members 8A-8C for coupling thus

divided frame bodies (cross sectionally U shaped member units) 2A-2D can be constituted, for example, as shown in Fig.4. Although Fig.4 shows an example of the coupling member 8B, the other coupling members can be constituted likely. As shown in Fig.4, after catching the side plates 9A and the bottom plates 9C of the intermediate inclining frame bodies 2B and 2C with coupling member pieces 8B1 and 8B2, the same are coupled by screw fastening 30. Thereby, all of the divided frame bodies (cross sectionally U shaped member units) 2A-2D are coupled to constitute the frame body 2.
When constituting the frame body as above, since the frame body 2 can be assembled without using welding, the thermal deforming of parts due to welding is eliminated, and in particular, the outward side track 14A, the return side tracks 15A and 19A can be fixed accurately. Further, during disassembling at the time of renewal, since the frame body 2 can be disassembled by unscrewing without performing melting work such as with a gas burner, danger of firing as well as load to environment can be eliminated.
Now, in the present embodiment, all of the upper horizontal frame body 2A, intermediate inclining frame bodies 2B and 2C and lower horizontal frame body 2D representing the cross sectionally U shaped member

units are explained to be constituted according to Fig. 2, namely, to be constituted by the cross sectionally U shaped member, the track supporting members and the lateral beam members. However, one that particularly requires highly accurate assembling work is the intermediate inclining frame bodies 2B and 2C for which substantial time is consumed for positioning work of the outward side track 14A (14B) and the return side tracks 15A (15B) and 19A (19B) . Therefore, the application of the structure according to the present invention can be limited only to the intermediate inclining frame bodies 2B and 2C and a conventional frame body unit of truss structure can be used for the upper horizontal frame body 2A and the lower horizontal frame body 2D.
Further, in the above embodiment, although an escalator was explained as an example of passenger conveyor, it is needless to say that present invention can be applied to a motor driven moving walk installed inclinedly and a motor driven moving walk installed horizontally.
Further, in the embodiment above, the cross sectionally U shaped member unit includes at least the cross sectionally U shaped member and the lateral beam members, however, other than the above such as the track

supporting members and other constitutional parts can be added to constitute the cross sectionally U shaped member unit.
[BRIEF DESCRIPTION OF THE DRAWINGS]
Fig.l is a side view of an escalator representing an embodiment of a passenger conveyer according to the present invention.
Fig.2 is an enlarged and vertically cross sectioned view taken along line A-A in Fig.l.
Fig. 3 is an enlarged perspective view of a track supporting member.
Fig.4 is an enlarged view of a coupling member taken along line B-B in Fig.l.
[EXPLANATION OF REFERENCE NUMERALS]
1•••Escalator, US•••Up stair floor, DS•••Down stair floor, 2•••Frame body, 2A•••Upper portion horizontal frame body, 2B, 2C•••Intermediate inclining frame body, 2D•••Lower portion horizontal frame body, 3A, 3B•••Getting on and off platform, 4 (4A, 4B) •••Step, 4F••• Front wheel, 4R••• Rear wheel, 5 ••• Driving device, 6A, 6B•••Balustrade, 7•••Moving handrail, 8A-8C•••Coupling member, 9A, 9B•••Side plate, 9C•••Bottom plate, 10A, 10B•••Upper face portion, 11,

12•••Lateral beam member, 13A, 13B•••Track supporting member, 14A•••Outward side track, 15A, 19A•••Return sidetrack, 16 ••• Skirt guard, 16A, 16B •••Bracket, 17A, 17B•••Inner deck cover, 18A, 18B•••Outer deck cover, 19•••Oil pan, 20, 30•••Screw fastening and 21A~29A•••Attachment face for screw fastening.

[SCOPE OF CLAIMS]
1. A passenger conveyer including a frame body
installed in a building structure and a constitutional
member of the passenger conveyer installed in the frame
body,
characterized in that said frame body is constituted by a cross sectionally U shaped member that is formed by bending a plate member so as to have right and left opposing side plates with an interval and a bottom plate coupling the bottom portions of these side plates and a lateral beam member of which both ends are fixed to said right and left side plates, and fixing between said cross sectionally U shaped member and said lateral beam member are performed by screw fastening.
2. A passenger conveyer including a frame body
installed in a building structure and a constitutional
member of the passenger conveyer installed in the frame
body,

characterized in that said frame body is constituted by a cross sectionally U shaped member that is formed by bending a plate member so as to have right and left opposing side plates with an interval and a bottom plate connecting the lower ends of these side plates, track supporting members that are respectively fixed to the opposing side plates of said cross sectionally U shaped member and a lateral beam member of which both ends are fixed to said right and left side plates, and fixing between said cross sectionally U shaped member, said track supporting members and said lateral beam member are performed by screw fastening.
3. A passenger conveyer according to claim 2 characterized in that said track supporting member is a plate shaped member, and an attachment face to the side plate of said cross sectionally U shaped member is formed by bending one side thereof and another attachment face to the constitutional member of the passenger conveyer is formed by bending a part of the opposing side thereof.
4. A passenger conveyer according to claim 3 characterized in that the constitutional member of the passenger conveyer includes many steps and an outward side track and a return side track for guiding these steps, and at the opposing side of said track supporting

member a plurality of projecting portions are formed and attachment faces for said outward side track and return side track are formed by bending a part of projecting portions.
5. A passenger conveyer according to claim 1 or 2 characterized in that the upper ends of said right and left side plates are bent in opposing direction each other so as to form a strengthening member.
6. A passenger conveyer according to claim 1 or 2 characterized in that the constitutional member of the passenger conveyer includes many steps and an outward side track and a return side track for guiding these steps, and said lateral beam member passes through between said outward side track and return side track and is fixed to said cross sectionally U shaped member by screw fastening.

7. A passenger conveyer according to claim 6 characterized in that in addition to said lateral beam member between said outward side track and return side track, another lateral beam member fixed to the bottom plate of said cross sectionally U shaped member is provided, and the bottom plate and the other lateral beam member are fixed by screw fastening each other.
8. A passenger conveyer including a frame body installed in a building structure and a constitutional

member of the passenger conveyer installed in the frame body,
characterized in that said frame body is divided in a plurality of groups in the longitudinal direction thereof, and a specific frame body among the divided frame bodies employs a cross sectionally U shaped member unit including a cross sectionally U shaped member formed by bending a plate member so as to have right and left opposing side plates with an interval and a bottom plate coupling the bottom portions of these side plates and a lateral beam member of which both ends are fixed to the right and left side plates, as well as a coupling member is provided that couples adjacent cross sectionally U shaped member units, and fixing between the side plates of the cross sectionally U shaped member and the lateral beam member and between said cross sectionally U shaped member unit and the coupling member is performed by screw fastening.
9. A passenger conveyer including a frame body installed in a building structure and a constitutional member of the passenger conveyer installed in the frame body,
characterized in that said frame body is divided in a plurality of groups in the longitudinal direction thereof, and a plurality of frame bodies among the

divided frame bodies employ a cross sectionally U shaped member unit including a cross sectionally U shaped member formed by bending a plate member so as to have right and left opposing side plates with an interval and a bottom plate coupling the bottom portions of these side plates, a lateral beam member of which both ends are fixed to the right and left side plates and track supporting members that are fixed respectively to the opposing side plates of said cross sectionally U shaped member as well as a coupling member is provided that couples adjacent cross sectionally U shaped member units, and fixing between the side plates of the cross sectionally U shaped member and the lateral beam member, between the side plates of the cross sectionally U shaped member and the track supporting members and between said cross sectionally U shaped member unit and the coupling member is performed by screw fastening.