JPH0444554Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a mechanism for supplying pressure oil, air, etc. to hydraulic equipment or pneumatic equipment placed on the workbench of a lift device, that is, This invention relates to a supply mechanism for pressure oil, etc. in a lift device.

[Conventional technology]

Generally, a lift device is sometimes used as a means of performing work such as piping work, painting work, etc. at a high place. In other words, a workbench is raised and lowered by a lift device, hydraulic equipment or pneumatic equipment is placed on the workbench, and piping work, painting work, etc. are performed using the hydraulic equipment or pneumatic equipment. There are cases. When working at high places using a lift device like this, there are restrictions due to weight, space, etc. to place all the equipment on the workbench of the lift device, so do not place cylinders etc. on the workbench. While installing hydraulic equipment and pneumatic equipment, an oil pump, oil tank, etc. will be installed on the ground side, and the oil pump, oil tank, etc. and cylinders, etc. will be connected with a hose, and the oil pump, oil tank, etc. will be connected to the cylinder, etc. The reality is that pressure oil, air, etc. are supplied to the above-mentioned hydraulic equipment and pneumatic equipment.

[Problem that the invention attempts to solve]

However, in the case of the above-mentioned method of supplying pressure oil, air, etc., a hydraulic or pneumatic device is attached to the upper end of the lift device, and a hose is extended downward from the hydraulic or pneumatic device. At the same time, the tip of the hose is connected to an oil pump, etc., and the hose is extended or bent as the lift device moves up and down, while supplying pressure oil, air, etc. to hydraulic or pneumatic equipment. When the lift device is lowered, the hoses get tangled, which makes cleanup very troublesome. The problem is that storage space for a large hose must be secured.

In addition, as a means of compactly storing the hose without causing tangles, a method has been proposed in which the hose is wound onto a reel, such as in an aerial work vehicle. Although the hose can be stored compactly without becoming tangled, a space is required to mount the reel, and as a result, the storage space for the hose cannot be reduced.

This invention is an attempt to improve the conventional problems as mentioned above, and the problem to be solved is to make it possible to store the hose compactly without causing tangles. Has a point. That is, the present invention is characterized in that the above-mentioned problems are solved by forming the hose into a pantograph shape so that the hose can expand and contract as the lift device moves up and down. The specific means and effects are as follows.

[Means for solving problems]

A lift cylinder is erected on a support platform, a workbench is attached to the tip of a piston rod that is inserted into the lift cylinder so that it can be raised and lowered, and hydraulic equipment or pneumatic equipment is placed on the workbench. In a lift device, a supply pipe for pressurized oil, air, etc. and a discharge pipe are interposed between a support platform and a workbench and are extendably connected in a pantograph shape.

[Effect]

By operating the lift cylinder to raise and lower the workbench, the supply pipe and the discharge pipe, which are connected in a pantograph manner, expand and contract as the workbench moves up and down.

〔Example〕

Hereinafter, specific embodiments of the present invention will be described with reference to the illustrative drawings.

1 to 6 are drawings showing a first embodiment, and 1 indicates a support base of a lift device. still,
Although not shown in the drawings, a lift cylinder is erected on the support stand 1, and a work table 2 is attached to the tip of a piston rod that is inserted into the lift cylinder so as to be able to move up and down. Hydraulic equipment is mounted on the

A mounting base 3 having an L-shaped cross section is fixed to one end of the support base 1, and one joint portion 4A of a universal joint 4 is fixed to the top surface of the mounting base 3. A pair of stopper bolts 5, 5 are erected with the stopper bolts 5, 5 in between, so that the rotation of the other joint portion 4B of the universal joint 4 is restricted within a certain range by both stopper bolts 5, 5. provided. A U-shaped support member 6 is fixed to the joint portion 4B. On the other hand, a mounting base 8 is fixed to one end of the workbench 2 so as to face the mounting base 3, and a support member 10 is attached to the mounting base 8 via a universal joint 9 similarly to the mounting base 3 side. Both support members 6,
A pantograph mechanism 7 is interposed between 10 and 10. The pantograph mechanism 7 connects supply pipes 11A..., 11B... for sending pressure oil to the hydraulic equipment and discharge pipes 12A..., 12B... for returning oil from the hydraulic equipment to the oil tank in a pantograph shape. provided by More specifically, a support shaft 13 is horizontally suspended on the support member 6, the base of the attachment member 15 is attached to one end of the support shaft 13, and the base of the attachment member 15 is attached to the other end of the support shaft 13. The bases of the mounting members 17 are rotatably supported with a collar 16 interposed between them, and a connecting pipe 1 for connecting to an oil tank or the like is provided at the tip of both the mounting members 15 and 17.
8 and 19 are attached. Both connecting pipes 18,
19 has an oil inlet 18' and an oil outlet 19' for taking oil in and out, respectively, and the oil inlet 18' is connected to an oil pump (not shown), and the oil outlet 19'
9' is connected to an oil tank or the like (not shown).
A supply pipe 11A and a discharge pipe 12A extend from the ends of the connecting pipes 18 and 19, respectively, and the ends of the pipes 11A and 12A are connected to one ends of swivel joints 20 and 20, respectively. The swivel joint 20 consists of a pair of elbow-shaped joint members 20A and 20B, one end of the other joint member 20B is inserted into one joint member 20A, and a gasket is inserted between both joint members 20A and 20B. 21 and a bearing 22 are interposed so that they can rotate freely relative to each other. Furthermore, both joint members 20B,
Supply pipe 11B and discharge pipe 12B from 20B
are extended in directions intersecting each other, and both pipes 11
Both pipes 11B and 12B are installed at the intersection of B and 12B.
A pivot plate 23 is provided interposed therebetween. The pivoting board 23 is a pair of pivoting members 23 formed in a disc shape.
A, 23B, both pivoting members 23A, 23B
are provided with recesses 24, 24 opening in opposite directions, and a through hole 25 is bored between both recesses 24, 24, and a support shaft 26 is inserted into the through hole 25, and the support shaft 26 is inserted into the through hole 25. By locking the retaining pin 27 to both ends of the shaft 26, both pivot members 23A,
23B are provided rotatably with respect to each other. A supply pipe 1 is provided on the end face of both pivot members 23A and 23B.
1B and the discharge pipe 12B are attached to the mounting bands 28, 2.
8. And both pipes 11
There is a swivel joint 2 at the tip of B, 12B.
Further, the supply pipe 11B and the discharge pipe 12B are connected through the pipes 0 and 20. In this way, a plurality of supply pipes 11B... and discharge pipes 12B... extend upward while intersecting with each other, and the supply pipes 11A and discharge pipes 12A are connected to the swivel joint 20 at the tips thereof. 20, and the tips of both pipes 11A, 12A are rotatably connected to the support member 10 via connecting pipes 46, 47, mounting members 48, 49, and support shaft 50. . An oil outlet 46' and an oil inlet 47' are opened in the connecting pipes 46 and 47, and the oil outlet 46' and oil inlet 47' are connected to hydraulic equipment.

7 and 8 are drawings showing the second embodiment, and in the first embodiment, both connecting pipes 1
8 and 19, the oil inlet 18' and the oil outlet 19' are opened at the oil inlet 31A and the oil outlet 3 in this embodiment.
1B is provided. More specifically, a mount 29 is fixed to the support 1, and a support member 30 having a U-shaped cross section is fixed to the top surface of the mount 29. The shaft 31 is horizontally mounted. At the center of the support shaft 31, there is a pair of oil inlets 31A and an oil outlet 31 with both longitudinal ends open.
A pair of mounting members 34 and 35 are rotatably supported on the support shaft 31 via bearings 36 and 36, and both mounting members 34 and 35 have an oil inlet 31A and an oil inlet 31A. One ends of a supply pipe 32A and a discharge pipe 33A are screwed together so as to communicate with the outlet 31B. In addition, the supply pipe 32A and the discharge pipe 33
The other end of A is screwed onto swivel joints 20, 20.

9 and 10 are drawings showing a third embodiment, in which both mounting members 34, 35 and swivel joint 2 are screwed together.
0 etc. and both pipes 32A, 33A or both pipes 1
1B and 12B are connected, but in this embodiment, they are connected by a flange portion 51.

11 to 13 are drawings showing the fourth embodiment, and in the second embodiment and the third embodiment, both pipes 32A and 33A are connected by a support shaft 31.
However, in this embodiment, both pipes 32A and 33A are provided so that they can be rotated both in the opening and closing direction and in a direction perpendicular to the opening and closing direction. Further, in the first embodiment, rotation in both directions is possible via the universal joint 4, but in such a method, the fulcrum positions are different, resulting in a so-called broken state. On the other hand, in this embodiment, the support shaft 38 formed in a cross shape allows rotation in both directions without causing a so-called broken state. More specifically, a support member 37 is fixed to the top surface of the mounting base 29 via a mounting plate 44, and a pair of bearing recesses 37', 37' are opened at the upper end of the support member 37, facing each other. Along with being
Inside both bearing recesses 37', 37' are shaft parts 38', 3.
Both shaft portions 38', 38' of the support shaft 38 formed in a cross shape with 8', 38", 38" are connected to both pipes 3.
It is fitted and inserted so as to be rotatable in a direction perpendicular to the opening/closing directions of 2A and 33A. Also, the other shaft portion 3 of the same support shaft 38
Both pipes 32A, 33A are rotatably supported in the opening/closing directions of the pipes 8'', 38'' via attachment members 39, 39. The support member 37 has oil openings 40, 40 aligned with the center lines of the bearing recesses 37', 37' (rotational fulcrums of both shaft parts 38', 38').
is opened, and a passage 4 is formed in the center of both shaft portions 38', 38' with one end communicating with the entrance/exit openings 40, 40.
1, 41 are provided, and both passages 41, 41 are provided.
It is provided at the other end to communicate with the pipes 32A and 33A.

14 and 15 are drawings showing the fifth embodiment, and in the fourth embodiment, the mounting base 2
Although the support member 37 is directly fixed to the mounting base 9, in this embodiment, the support plate 4 is attached to the top surface of the mounting base 29.
2 is fixed, and the support shaft 43 is inserted between the support plate 42 and the mounting plate 45.
A thrust bearing 52 is interposed between the mounting plate 45 and the tip of the thrust bearing 5.
2 so that the support member 37 can be pivoted in the horizontal direction.

Next, its operation will be explained with reference to the first embodiment.

An oil inlet 18' opening in the connecting pipe 18 is connected to an oil pump, an oil outlet 19' opening in the connecting pipe 19 is connected to an oil tank, and an oil outlet 46' and an oil inlet opening in connecting pipes 46 and 47 are connected to an oil pump. By connecting 47' to hydraulic equipment,
Pressure oil can be supplied to the hydraulic equipment on the workbench 2 through the oil inlet 18', the supply pipes 11A and 11B, and the oil outlet 46', while the oil inlet 47',
Return oil can be discharged to the oil tank through the discharge pipes 12A, 12B and the oil outlet 19'. And like this, each oil inlet 18', 19', 4
With the oil tank, hydraulic equipment, etc. connected to 6' and 47', by operating the lift cylinder to raise the work platform 2, the pantograph mechanism 7 can be moved to the swivel position as the work platform 2 is raised. The action of unfolding can be obtained through the rotation of the point 20 and the pivot plate 23. That is, each pipe 11A,
An effect is obtained in which 11B, 12A, and 12B mutually rotate in the opening direction. With the pantograph mechanism 7 extended in this manner, work such as piping work, painting work, etc., is performed by supplying pressure oil to the hydraulic equipment. On the other hand, by lowering the workbench 2, the pipes 11A, 11B, 12A, 12B mutually rotate in the closing direction as the workbench 2 is lowered, so that the pantograph mechanism 7 can be folded.

In this embodiment, a lift device equipped with a hydraulic device at the tip of the piston rod has been described, but the present invention can be similarly applied to a lift device equipped with a pneumatic device.

[Effect of idea]

The present invention is constructed as described above.
As described above, a lift cylinder is erected on a support platform, a workbench is attached to the tip of the piston rod that is inserted into the lift cylinder so that it can be raised and lowered, and hydraulic equipment or pneumatic equipment is mounted on the workbench. In this lift device, the piston rod is lowered by connecting a supply pipe and a discharge pipe for pressurized oil, air, etc., in a pantograph shape, interposed between the support platform and the work platform. In addition to being able to be stored compactly without causing any tangles between the two pipes, the storage space can also be reduced. In addition, by connecting the supply pipe and the discharge pipe in a pantograph-like manner as described above, the width of the storage space only needs to be approximately the thickness of the pipe, making it possible to store multiple sets of different types. It is now possible to store pipes in a stacked manner in the width direction, which allows multiple types of hydraulic equipment and pneumatic equipment to be placed on the workbench, and each equipment to be separately supplied with pressure oil, air, etc. We have now been able to supply the following.

[Brief explanation of drawings]

1 to 6 are drawings showing the first embodiment, in which FIG. 1 is a front view showing the entire oil feeding mechanism according to the present invention, FIG. 2 is a side view of the same, and FIG. 4 is a side view of the same, FIG. 5 is a partial cross-sectional view of the swivel joint portion, and FIG. 6 is a partial cross-sectional view of the pivot plate portion. 7 and 8 are drawings showing the second embodiment, in which FIG. 7 is an enlarged front view of the main part, and FIG. 8 is a sectional view of the same side. 9 and 10 are drawings showing the third embodiment, in which FIG. 9 is an enlarged front view of the main part, and FIG. 10 is a sectional view of the same side. 11 to 13 are drawings showing the fourth embodiment, in which FIG. 11 is an enlarged front view of the main part, FIG. 12 is a sectional view of the same side, and FIG. 13 is a cross sectional view of the same. 14 and 15 are drawings showing the fifth embodiment, in which FIG. 14 is an enlarged front view of the main part, and FIG. 15 is a sectional view of the same side. 1...Support stand, 2...Work table, 3...Mounting stand, 4...Universal joint, 4A, 4B
...Joint part, 5...Stopper bolt, 6
...Support member, 7...Pantograph mechanism, 8...
Mounting base, 9...Universal joint, 10
... Support member, 11A, 11B ... Supply pipe,
12A, 12B...Exhaust pipe, 13...Spindle,
15...Mounting member, 16...Color, 17...
Mounting member, 18... Connection pipe, 18'... Oil inlet, 19... Connection pipe, 19'... Oil outlet,
20...Swivel joint, 20A, 20B...
...Joint member, 21...Putskin, 22...
Bearing, 23... Pivoting board, 23A, 23B... Pivoting member, 24... Recess, 25... Through hole, 26...
... Support shaft, 27 ... Retaining pin, 28 ... Mounting band, 29 ... Mounting base, 30 ... Support member, 3
1... Support shaft, 31A... Oil inlet, 31B... Oil outlet, 32A... Supply pipe, 33A... Discharge pipe, 32', 34, 35... Mounting member, 36...
... Bearing, 37... Support member, 37'... Bearing recess, 38... Support shaft, 38', 38''... Shaft portion, 3
9... Mounting member, 40... Doorway, 41...
Passage, 42... Support plate, 43... Support shaft, 44, 4
5...Mounting board, 46, 47...Connecting pipe, 4
6'...Oil outlet, 47'...Oil inlet, 48, 49...
...Mounting member, 50... Support shaft, 51... Flange portion, 52... Thrust bearing.

Claims (1)

[Scope of utility model registration request] A lift cylinder is erected on a support platform, a workbench is attached to the tip of a piston rod that is inserted into the lift cylinder so that it can be raised and lowered, and hydraulic equipment or pneumatic equipment is placed on the workbench. A supply mechanism for pressurized oil, etc., in a lift device, which comprises a supply pipe for pressurized oil, air, etc., and a discharge pipe, which are interposed between the support platform and the workbench, and a discharge pipe are telescopically connected in a pantograph shape.