JPS6342679Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a workbench device for a track motor car or other work vehicle that performs work such as inspection and repair of overhead contact lines and supporting parts above railway tracks.

[Technical background and problems of the invention]

The above-mentioned work vehicle is equipped with a workbench on the entire surface of the vehicle body except for the driver's cab, and workers inspect and repair the contact line and its supporting parts on the workbench, and the floor space of the workbench is should be larger, but
If it were simply extended, the workbench would protrude beyond the length of the vehicle itself, causing interference with the workbenches of other connected work vehicles.

To avoid this, it is possible to make part of the workbench telescoping (see Utility Model Application Publication No. 149456/1983) or to increase the length of the vehicle. There is a certain level of difference in the floor surface height between the fixed work platform and the telescopic work platform, which results in a lack of safety during night work. As a result of securing a long section, there are problems such as the need to take up a large space under the fixed workbench, and in the latter case, the weight increases by extending the vehicle body, which requires a large engine. ,
Strengthening the power system raises the price and requires a larger garage, among other problems.

[Purpose of invention]

This idea was created in view of the above-mentioned problems.
The purpose is to increase the floor area of the work platform without substantially increasing the length of the work vehicle or creating a difference in floor height. To provide a work platform device for a work vehicle in which a handrail is automatically formed at times.

[Summary of the idea]

The workbench device for a vehicle according to the present invention includes a main workbench, a movable workbench whose base end is pivotally connected to the end edge of the main workbench,
A hydraulic cylinder device connected to the movable workbench so that the movable workbench can be rotated between a horizontal extended position and an upright folded position, and a refractor whose proximal edge is pivotally connected to the front edge of the movable workbench The tip of the workbench is connected to the refraction workbench via a pin supported movably within a certain range along both side edges of the refraction workbench, and the base end is connected to the base edge of the movable workbench relative to the main workbench. The support arm is pivotally connected to the main workbench at a position below the pivot joint, and the movable workbench is in an extended position, and the bending workbench extends horizontally from its tip edge toward the upper side of the bending workbench. As shown in FIG. and a support link that connects to the fixed handrail of the main work platform at an elevated position.

[Example of idea]

FIG. 2 shows a track motor car as an example of a working vehicle. A driver's cab 1 is provided on the vehicle body of this motor car, and a main workbench 2 is further provided that can move up and down, and the main workbench 2 can be raised and lowered by operating the driver's cab 1. There is. The main workbench 2 is supported by a column 3, and the column 3 is moved up and down by a lifting mechanism 4. The main workbench 2 is equipped with a fixed handrail 5 around it.

The fixed handrail 5 is provided at its edge with a foldable overhanging workbench mechanism 7, which is a feature of the present invention. In the state shown in FIG. 2, the overhanging workbench mechanism 7 is folded, and when it is extended, the workbenches 8 and 9 are connected to each other on the same plane as the floor of the main workbench 2, as shown in FIG.
is formed. The planar shape of the overhanging work tables 8 and 9 is as shown in FIG.

FIG. 1 shows an enlarged view of the main part of FIG. 3. As shown in the figure, a movable workbench 8 is attached to the edge of the main workbench 2.
The proximal edge of is pivotally connected by a pin 10. An arm 11 protrudes from the movable workbench 8, and the tip of a piston rod 14 of a hydraulic cylinder 13 is pivotally connected to the arm 11 by a pin 12 at the tip of the arm. The base end of the hydraulic cylinder 13 is pivotally connected to a bracket 16 of the main workbench 2 by a pin 15. When the hydraulic cylinder 13 is retracted, the movable workbench 8 assumes the horizontal position shown in FIG. 1, and when the hydraulic cylinder 13 is extended, the movable workbench 8 rotates clockwise and folds upright as shown in FIG. take a position.

A proximal edge of a bending workbench 9 is pivotally attached to the distal end edge of the movable workbench 8 with a pin 19 . Pins 20 are supported along both side edges of the bending workbench 9 so as to be movable within a certain range. This pin 2
0 is a rotatable guide roller 2 as shown in FIG.
The guide roller 21 is configured to be able to roll along a guide groove 22 on the side edge of the bending workbench 9. The movement range of the guide roller 21 is the contact portion 2
3a and 23b.

The pin 20 is inserted through the tip of a support arm 25, and the base end of the support arm 25 is pivotally connected to a bracket 26 at the tip of the main workbench 2 by a pin 27. The pin 27 is the base end pivot pin 10 of the main workbench 8
in a lower position. In the position shown in FIG. 1 where the guide roller 21 at the tip of the support arm 25 abuts the contact portion 23a, the movable workbench 8 and the bending workbench 9 assume a horizontal position on the same plane as the main workbench 2.

Links 31a and 3 forming a handrail parallel link mechanism 31 are attached to the side edge of the bending work table 9 by pins 30 on the upper surface of the bending work table 9 in the position shown in FIG.
The proximal end of 1b is pivotally attached. Both links 31a,
31b faces upward, and its tips are pivoted by pins 33 to both ends of a connecting link 32 that serves as a handrail. On the other hand, one end of the support link 36 is pivotally connected to the link 31b by a pin 34 provided near the upper end of the link 31b on the main workbench 2 side, and the other end is pivotally connected to the fixed handrail 5a of the workbench 2 by a pin 35. There is. The pin 35 is the pivot pin 1 at the base end of the movable workbench 8.
It is located higher than 0. The parallel link mechanism 31 is provided on both side edges of the bending workbench 9, and the links 31a of both link mechanisms 31, 31 are connected to the handrail 38 (the fourth
(Figure).

In the overhanging workbench mechanism 7 described above, in the overhanging position shown in FIG. Then, the parallel link mechanism 31 rises upward, and together with the support link 36, both work platforms 8 and 9
It forms a handrail. In this state, the workbenches 8 and 9 are on the same plane as the main workbench 2, and there are also handrails, so the worker can work safely.

In this state, the downward rotation of the movable workbench 8 is prevented by the hydraulic cylinder device 13 resisting contraction, but the stopper contacts the main workbench 2 to prevent the movable workbench 8 from descending. If this is provided, the descent will be surely prevented. On the other hand, downward rotation of the bending workbench 9 is also prevented by the support arm 25 acting as a restraint bar.

When the hydraulic cylinder 13 is extended in the state shown in FIG. 1, the movable workbench 8 rotates upward, and accordingly, the bending workbench 9 gradually hangs down around its pin 19 so that its tip edge goes downward, and the support arm The pin 20 at the tip 25 begins to be displaced toward the proximal end along the side edge of the bending workbench 9. On the other hand, the parallel link mechanism 31 restrained by the support link 36 rotates counterclockwise around the pins 30, 30 as the bending workbench 9 hangs down and rises, and finally reaches the state shown in FIG. is obtained.

In this state, the movable workbench 8 rises upward, the bending workbench 9 hangs down, and the support arm 25,
The links 31a, 31b, the connecting link 32, and the support link 36 also hang downward, and all the members are folded into a compact state along the handrail 5a of the main workbench 2. The overhanging workbench mechanism 7 is housed inside the coupler 40 as shown in FIG.

[Effect of idea]

The present invention provides an overhanging workbench mechanism that is movable between a position where it is extended to increase the workbench area and a position where it is folded and stored compactly by only the telescoping motion of a hydraulic cylinder. Two movable and refracting workbenches are flush with the workbench floor, greatly expanding the workfloor area, and handrails are automatically formed, making it easier and safer to work.

[Brief explanation of the drawing]

FIG. 1 is an enlarged side view of the main parts of the workbench device of the present invention in an extended state, FIG. 2 is a side view of the entire working vehicle having the workbench device of the present invention in a folded state, and FIG. 2 is a side view similar to FIG. 1 in a partially extended state, FIG. 4 is a plan view of FIG. 2 in an extended state, FIG. 5 is an enlarged side view in a folded state, and FIG. 6 is a view similar to FIG. It is an enlarged view of a part of. 2... Main workbench, 5, 5a... Fixed handrail, 8...
...Movable workbench, 9...Refraction workbench, 11...Arm,
10, 12, 15, 19, 20, 27...pin,
13... Hydraulic cylinder, 23a, 23b... Contact portion, 25... Support arm, 30, 33, 34, 3
5... Pin, 31... Parallel link mechanism for handrail, 3
6...Support link.

Claims (1)

[Scope of utility model registration request] A main workbench, a movable workbench whose proximal edge is pivotally connected to the end edge thereof, and a movable workbench connected to the movable workbench such that the movable workbench can be pivoted between a horizontal extended position and an upright folded position. The distal end is connected to a hydraulic cylinder device, a bending workbench whose proximal edge is pivotally connected to the tip edge of the movable workbench, and pins supported movably within a certain range along both side edges of the bending workbench. a support arm connected to the refracting workbench, the base end of which is pivotally connected to the main workbench at a position below the pivot point of the base edge of the movable workbench with respect to the main workbench, and the movable workbench is in an extended position; A parallel link mechanism for a handrail whose base end is pivoted to the side edge of the refraction workbench so that the refraction workbench extends horizontally from its tip edge toward the upper side of the refraction workbench, and the movement of this parallel linkage mechanism. A workbench device for a vehicle, comprising a support link that connects a workbench side link to a fixed handrail of a main workbench at a position higher than a pivot point of a movable workbench base end edge to the main workbench.