JPH0738421U - Automatic loading / unloading device for scaffolding board in lift truck - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an automatic loading / unloading device for a lift work vehicle, which has a simple structure and can reliably slide the scaffolding plate to the left and right of the workbench. [Structure] An elevating mechanism 3 is provided between a moving vehicle 1 and a workbench 2 so that the workbench 2 can be moved up and down, and a scaffolding plate 4 that can project to the left and right under the workbench 2 is slidable left and right. The left and right ends of the scaffolding plate 4 are fixed once on the left side and once on the right side, and the two ends of the meandering chain 5 are fastened to each other. The guide wheel 6 attached to the 2 side is arranged, the drive wheel 7 attached to the workbench 2 side is arranged in the meandering part 5 ″ on the opposite side, and the power is distributed to the drive wheel 7 to scaffold plate 2 An automatic scaffolding device for a scaffolding board in a lift work vehicle in which a limit switch mechanism 8 for restricting a protruding portion of the scaffolding plate 2 is provided so that the scaffolding plate can be automatically taken in and out on either side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a work platform is provided on a moving vehicle so that it can be moved up and down, and a scaffolding plate can be installed on the underside of the work platform so that it can project from left to right, and can be used for working in high places. It relates to the device.

[0002]

[Problems to be solved by conventional techniques and devices]

 A conventional scaffolding plate automatic loading / unloading device for a lift work vehicle includes guide wheels 6 ′ and 6 ′ provided at the left and right ends of the worktable 2 in the longitudinal direction as shown in FIG. 6, and the guide wheels 6 ′ and 6 ′. One working wire 30 is wound around the drive wheel 7'provided at the intermediate position of the workbench 2 and the both ends thereof are fixed to both ends in the longitudinal direction of the scaffolding plate 4, and the drive wheel 7'is fixed. Since the scaffolding plate 4 is configured to project right and left with respect to the workbench 2 by rotating in the forward / reverse direction, the structure is complicated and the guide wheel 6'and the drive wheel 7'slide with respect to the work wire 30. However, when used for a long period of time, the work wire 30 stretched, the tension and tension were loosened, and it did not operate smoothly.

The present invention provides an automatic loading / unloading device for scaffolding plates in a lift work vehicle, which solves the above drawbacks.

[0004]

[Means for Solving the Problems]

 The gist of the present invention will be described with reference to the accompanying drawings.

An elevating mechanism 3 is provided between the mobile vehicle 1 and the workbench 2 so that the workbench 2 can be vertically moved up and down, and a scaffolding plate 4 that can project to the left and right is horizontally slid below the workbench 2. Freely provided, the left and right ends of the scaffolding plate 4 are fastened once on the left side and once on the right side by turning back and forth twice, and both ends of the meandering chain 5 are fastened. A guide wheel 6 attached to the base 2 side is arranged, a drive wheel 7 attached to the workbench 2 side is arranged on the meandering portion 5 "on the opposite side, and the power is distributed to the drive wheel 7 to scaffold the board. 2 relates to an automatic scaffolding plate loading / unloading device for a lift work vehicle, which is characterized in that it is provided on either left or right side so that it can be automatically moved in and out, and a limit switch mechanism 8 for restricting the protruding portion of the scaffolding plate 2 is arranged. It is a thing.

[0006]

[Action]

 When the workbench 2 is lifted to a desired height with respect to the vehicle body of the mobile vehicle 1 by the lifting mechanism 3 and the drive wheels 7 attached to the workbench 2 are rotated clockwise as shown in FIG. The meandering chain of the meandering part 5 ′ of the chain 5 is pulled by the drive wheel 7, and the fastening part fixed to the left end of the scaffolding plate 4 moves to the right by the guide wheel 6, so that the scaffolding plate 4 is moved relative to the work platform 2. Since it protrudes to the right, the worker moves from the workbench 2 to the scaffolding plate 4 to perform work at a high place. Further, when the drive wheel 7 is rotated counterclockwise in the opposite direction to the above, the meandering chain of the meandering portion 5 ″ between the fastening portion fixed to the right end of the scaffolding plate 4 of the double meandering chain 5 and the drive wheel 7 is meandered. Are attracted by the drive wheels 7, and the scaffolding plate 4 projects leftward with respect to the workbench 2.

Further, since the limit switch mechanism 8 for restricting the protruding portion of the scaffolding plate 2 is provided between the scaffolding plate 4 and the workbench 2, the scaffolding plate 2 is moved to a predetermined level or more by the operation of the limit switch mechanism 8. It regulates the protrusion to the left and right.

[0008]

【Example】

 The drawings show an example of a preferred embodiment of the present invention, in which an elevating mechanism 3 is provided between a mobile vehicle 1 and a workbench 2 so that the workbench 2 can be vertically moved up and down. A scaffolding plate 4 that can project to the left and right is provided so that it can slide left and right.

In the illustrated embodiment, a pantograph mechanism for vertically moving the workbench 2 by expanding and contracting a cylinder 3'operated by hydraulic pressure or air pressure is employed as the elevating mechanism 3, and the workbench 2 is provided at the front and rear sides thereof, respectively. The figure shows the case where two scaffolding plates 4 independently protruding to the left and right are installed.

A hollow square tube 10 is provided in the left-right direction below the center of the workbench 2 in the front-rear direction, and an angle-shaped front cross rail 11 is provided on the workbench 2 at predetermined intervals on the left and right sides of the hollow square tube 10. , The rear cross rail 12 is erected to form the installation space for the scaffold plates 4 and 4, and a plurality of them are provided at the respective facing positions between the front cross rail 11, the hollow square tube 10, the hollow square tube 10 and the rear cross rail 12. The base portion of the guide roller means 13 is fixed.

In the illustrated guide roller means 13, a bearing 15 is fitted to the other end of the guide roller shaft 14, and a guide roller 16 with a flange is rotatably fitted to the bearing 15 so that the guide roller step 13 is formed. The guide roller shaft 14 is fixed to the rear side plate of the front horizontal rail 12, both side surfaces of the mid-angle square tube 10, and the front side plate of the rear horizontal rail 13 so that the base ends of the guide roller shafts 14 are opposed to each other. Are formed so as to face each other inward and project.

Scaffolding plates 4, 4 are provided in the facing spaces between the front crosspiece 11 and the hollow square tube 10, the intermediate square tube 10, and the rear crosspiece 12, respectively, and the channel shapes before and after the scaffolding plate 4 are provided. The openings of the front horizontal frame 4'and the rear horizontal frame 4 "are fitted into the guide rollers 16 of the guide roller means 13, and the upper and lower flange ends of the front horizontal frame 4'and the rear horizontal frame 4" are guide rollers. Scaffold plates 4 and 4 are provided so that they can slide left and right, using the 16 flanges as guides.

The front and rear scaffolding plates 4, 4 are provided with locking portions 17, 17 for fixing the ends of the two-fold meandering chain 5 to the left and right ends of the scaffolding plates 4, 4 below the right end of the work table 2 corresponding thereto. Sprocket-shaped guide wheels 6 are provided on the respective sides, and sprocket-shaped drive wheels 7 are provided on the lower side near the left end of the workbench 2, and a hydraulic pressure or pneumatic pressure generating mechanism (not shown) is provided on the drive wheels 7. ) The fluid pressure motor 18 that operates by the hydraulic pressure or pneumatic pressure generated by the above is connected.

One end of each of the two meandering chains 5 is fixed to the locking portion 17 on the left side of each of the scaffolding plates 4, 4, and the other end of the two meandering chains 5 is engaged with the guide wheel 6 to the left. Extending toward one side to form a meandering portion 5 ', the extended end side is meshed with the drive wheel 7 and the other end is extending rightward to form a meandering portion 5 ", and the extension thereof is performed. The end is fixed to the locking portion 17 at the right end of the scaffolding plate 4.

Since the present embodiment is configured as described above, the cylinder 3'is operated to raise the workbench 2 by the pan tag trough mechanism to hold it at a predetermined height, and the fluid pressure motor 18 is operated to drive it. When the wheel 7 is rotated in the forward / reverse direction, the scaffolding plate 4 that fastens both ends of the double meandering chain 5 by the double meandering chain 5 and the guide wheel 6 causes the guide roller means 13 to fix the scaffolding plate 4 to the lower side of the worktable 2. Slide left and right to project.

When the scaffolding plates 4 are slid to the left side of the work platform 2 and provided with stoppers 19 and 20 projecting downward on the inner sides of the left and right ends of the scaffolding plates 4 and 4, respectively. A plunger-type switch 21 is provided to stop the drive wheels 7 by abutting the stopper 20 and restricting the protrusion of the workbench 2. When the scaffolding plate 4 slides to the right and protrudes, the stopper 19 abuts. A plunger type switch 22 for restricting the protrusion of the workbench 2 is provided on the workbench 2.

Further, two channel-shaped brackets 26, 26 are provided on each of the left and right ends of the scaffolding plates 4, 4 so that the handrail 23 is erected, and the bottom plate of each of the brackets 26 has a bottom plate under the handrail 23. The fitting hole 23 'for inserting the handrail 23 is inserted into the end of the handrail 23. The long holes 23 "are formed in the standing plates at the front and rear of the bracket 26. The long hole 23" is provided at the lower end of the handrail 23. The protruding pin 27 provided is fitted, and in the normal state, the lower end of the handrail 23 is fitted in the fitting hole 23 ', and the handrail 23 is erected on the scaffolding plate 4 by the protruding pin 26 and the elongated hole 23 ". , The lower end of the handrail 23 is pulled out from the fitting hole 23 'so that it does not interfere with the worktable 2 when the scaffolding plate 4 slides, and the handrail 23 is tilted outward by the elongated hole 23 "and the projecting pin 27 so that Hold the state.

Reference numeral 24 is a control device for moving the work vehicle 1 and an operation table for operating the elevating mechanism 3, and 25 is an operation portion for moving the scaffolding plate 4 left and right.

[0019]

[Effect of device]

 As described above, the present invention is provided with an elevating mechanism between a moving vehicle and a workbench so that the workbench can be moved up and down, and a scaffolding plate that can project to the left and right is freely slidable below the workbench. The left and right ends of this scaffolding plate were fixed once on the left side and once on the right side, and the two ends of the meandering chain were fastened, and the meandering part of this double meandering chain was attached to the workbench side. A guide wheel is installed, and a drive wheel attached to the workbench side is installed on the meandering part on the opposite side.The power is distributed to this drive wheel and the scaffold plate is automatically installed on either side. Since a limit switch mechanism that restricts the protruding part of this scaffold plate is installed, the guide wheels provided at the left and right ends of the worktable in the conventional manner and the workbench corresponding to this guide wheel are provided. A single actuation wire is wound around the drive wheel installed in the middle position of the Compared to an automatic loading / unloading device configured to fix both ends in the longitudinal direction and rotate the drive wheel forward / backward to project the scaffolding plate to the left or right of the workbench, the number of guide wheels is one less. In addition, the structure is simpler and the cost is lower, and the work of adjusting the work wire elongation due to slippage and long-term use caused by hanging the wire is eliminated, and the meandering chain allows the scaffolding plate to easily and surely protrude to the left and right. It is an automatic loading and unloading device for scaffolding boards in an excellent lift truck that is economical and has a simple structure.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a lift work vehicle of the present embodiment.

FIG. 2 is a plan view of a main part of this embodiment.

FIG. 3 is a side view of guide roller means for sliding the scaffold plate left and right with respect to the workbench of the present embodiment.

FIG. 4 is an explanatory cross-sectional view showing a mechanism for erecting handrails on brackets provided at the left and right ends of the scaffold plate of the present embodiment.

FIG. 5 is an explanatory cross-sectional view showing a mechanism for holding the handrail on the bracket to the outside and holding it in a horizontal state.

FIG. 6 is a plan view for explaining the operation wire hook of the conventional automatic loading / unloading device.

[Explanation of symbols]

 1 Mobile Vehicle 2 Work Table 3 Lifting Mechanism 4 Scaffolding Board 5 Double Meandering Chain 5'Meandering Part 5 "Meandering Part 6 Guide Wheel 7 Drive Wheel 8 Limit Switch Mechanism

Claims (1)

[Scope of utility model registration request] 1. A lifting mechanism is provided between a moving vehicle and a workbench so that the workbench can be moved up and down, and a scaffolding plate that can project to the left and right is provided below the workbench so as to be slidable left and right. The left and right ends of the scaffolding plate are fastened once on the left side and once on the right side, and the two ends of the meandering chain are fastened to each other. Then, the drive wheel attached to the workbench side is arranged in the meandering part on the opposite side, and the scaffold plate is automatically installed on either side of the scaffold plate by distributing power to this drive wheel. An automatic loading / unloading device for a scaffolding board in a lift work vehicle, which is provided with a limit switch mechanism for restricting a protruding portion.