JPH10182085A - Working device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact lightweight working device which is suitable for performing various kinds of work to the back face of a bridge, especially, and saves working labor of a worker. SOLUTION: A swivel base 12 is arranged in a vehicle body 11 freely turnably in the horizontal direction, while an extensible boom 13 which can be freely raised/lowered and extended/shrunk is arranged in the swivel base 12. An extensible arm 14 which can be freely extended/shrunk in the vertical direction is arranged in the tip part of the extensible arm 13, while in the lower end part of the extensible arm 14, a working base 16 is arranged freely turnably in the horizontal direction. In the working base 16, a working extensible pole 20 which can be freely turned horizontally and extended/shrunk in the horizontal direction is arranged, and at the tip of the working extensible pole 20, a working means 30 such as a chaplet device and a painting nozzle can be mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial apparatus suitable for maintenance work such as painting repair on a large bridge.

[0002]

2. Description of the Related Art In a bridge, various maintenance operations are performed to extend the life of the bridge. One of such operations is a painting repair operation. In the paint repair work, the worker removes the old paint film using a so-called keren device configured to peel off the paint film by rotating the wire brush, and then applies a new paint using the paint device. .

[0003] Here, the paint repair is performed not only on the surface of the bridge (the part where cars and people pass and handrails, etc.) but also on the back of the bridge (behind the part where cars and people pass, the side facing the sea and river). Also need to do. When repairing the backside paint, a crane truck is installed on the bridge and the workbench is suspended from this crane to position the worker below the backside of the bridge. Various operations are performed using such a method, and such operations have been performed with the worker facing upward. In addition, when repairing the paint on the back of the bridge, the work table suspended from the crane is formed in an L shape so that the worker can move to the center of the bridge. Since the horizontal part of the workbench must be formed to have a length at least half the width of the bridge so that workers can move across the width of the bridge, painting repair work for large bridges In order to perform this, it is necessary to enlarge the work table.

[0004]

When repairing the paint on the backside of a bridge as described above, an old paint film peeled off using a keren device may fall on the worker himself or paint may be applied during painting. There was a problem. In addition, since the worker needs to connect the vertical portion of the work table and get on the horizontal portion, which is the work position, there is a problem that getting on and off the work table is complicated. In addition, increasing the size of the workbench increases the cost of equipment for repairs and increases the weight of the workbench, which necessitates a large crane truck. There is a problem that the operation becomes complicated and the work efficiency is reduced.

The present invention has been made in view of such a problem, and is a working device particularly suitable for performing various works on the back surface of a bridge. It is an object of the present invention to provide a working device that can be performed, and that can perform a small, lightweight, and quick work.

[0006]

In order to achieve the above-mentioned object, a working device of the present invention is provided with a swivel base horizontally rotatable on a base, and the swivel base has at least a first rotatable free base. There is a boom. A second boom that can freely expand and contract in the vertical direction is provided at the tip of the first boom, and a worktable is provided at the lower end of the second boom so as to be horizontally pivotable.
A work pole that can be freely turned horizontally and expanded and contracted in the horizontal direction is provided on the work table, and a work means can be attached to the tip of the work pole.

[0007] According to the working device configured as described above,
By performing the turning operation of the turntable and the raising / lowering operation of the first boom in a state where the base is installed on the bridge, the tip end of the first boom can be protruded to the side of the bridge. If the extension operation of the second boom is performed in a state where the tip of the first boom is projected outside the bridge in this manner, the workbench disposed at the lower end of the second boom is moved below the bridge. be able to.

If the work table is horizontally turned from this state,
The workbench can be positioned towards the bridge or beneath the bridge. Then, by performing the horizontal turning operation and the expansion / contraction operation of the work pole, the work means attached to the tip can be moved to a desired position on the back surface of the bridge.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A work vehicle for painting a bridge according to a preferred embodiment of the present invention will be described below.
A bridge in which painting repair work is performed by the bridge painting work vehicle will be described with reference to FIGS. 4 and 5.
The bridge K is a large bridge such as the main four bridges, and is configured by suspending a bridge body KH. The bridge main body KH has an upper section K2 where general vehicles travel,
Lower stage K1 having walk passage Kd and work passage Ka
Is provided. The bridge painting work vehicle 1 shown in FIG. 1 is for repairing the painting of the back surface Kb in the lower stage K1 which is a portion indicated by I in FIG. Note that handrails Kc are provided on the left and right sides of each of the passages Ka and Kd.

The work vehicle 1 for painting a bridge is provided with a vehicle body (base) 11 configured so that the work path Ka of the bridge K can travel freely by a crawler belt 11a, and is disposed on the vehicle body 11 so as to be able to turn horizontally. And a swivel 12. The swivel base 12 has a telescopic boom (first boom) 1 that can be raised and lowered.
3 are provided. The telescopic boom 13 is configured telescopically (in a nested manner) from a base end boom 13a and a distal end boom 13b, and is configured to be telescopic by a telescopic cylinder (not shown). Further, an up-and-down cylinder 13 provided between the swivel base 12 and the base end boom 13a.
By the extension / retraction operation of c, the up / down operation of the extension / retraction boom 13 can be freely performed.

A telescopic arm (second boom) 14 is pivotally supported at the distal end of the telescopic boom 13 so as to be swingable in the same plane as the undulating direction of the telescopic boom 13 (in the horizontal direction in FIG. 1). I have. The telescopic arm 14 includes a proximal arm 14a.
, The proximal intermediate arm 14b, and the distal intermediate arm 14
c and the distal end arm 14d, and is telescopically configured so that it can be extended and contracted by an extension and contraction operation of a telescopic cylinder (not shown).

In the telescopic arm 14, the proximal arm 1
4a is pivotally supported by the tip boom 13b.
The upper leveling cylinder 13e disposed between the distal boom 13b and the proximal arm 14a is moved based on the expansion and contraction operation of the lower leveling cylinder 13d disposed between the swivel table 12 and the proximal end boom 13a. By performing the expansion and contraction operation, the expansion and contraction arm 14 can be always maintained at a predetermined angle regardless of the up-and-down angle of the expansion and contraction boom 13.

The telescopic arm 14 is pivotally supported so as to always maintain a vertical state, and each of the arms 14b to 14d is extended downward with respect to the base arm 14a by the extension operation of the telescopic cylinder. . A worktable 16 is provided at a lower end of the tip arm 14d. Work table 16
Is a workbench support member 16a which is disposed so as to be horizontally pivotable with respect to the tip arm 14d;
And a workbench main body 16b which is mounted on the workbench so that the worker M can board the workbench.

In the bridge painting work vehicle 1, when the telescopic boom 13 and telescopic arm 14 are operated as described above, the outrigger jacks 15, 15 for stably supporting the vehicle body 11 are provided on the vehicle body 11. It is arranged on the left and right. The outrigger jack 15 includes a jack arm 15a pivotally supported so as to be vertically swingable with respect to the vehicle body 11,
A jack post 15b pivotally supported by a tip end of the jack arm 15a;
b.

The jack post 15b is pivotally supported at the tip end of the jack arm 15a by a pivot pin 15f so as to be swingable in the left-right direction. By replacing the lock pin 15g, the jack post 15b is moved relative to the jack arm 15a. It can be held at a predetermined angle.

In the outrigger jack 15 configured as described above, in order to perform the grounding operation, the operator first swings the jack post 15b outward so as to open outward, and then fixes it with the lock pin 15g. Then, the vehicle body 11 is stably supported by extending the jack cylinder 15e until the ground reaction force is obtained. In order to perform the storing operation, the jack arm 15a is made vertical by reducing the jack cylinder 15e, and then the jack post 15b is manually swung inward to be stored and fixed with the lock pin 15g.

The work vehicle 1 for painting a bridge constructed as described above.
1, the telescopic boom 13 is raised by performing the extension operation of the up-and-down cylinder 13c.
The work table 16 can be moved upward as shown by. Then, from this state, the workbench 16 is bridged by passing the handrail Kc arranged on the side surface of the lower stage K1 as shown by a chain line B by performing the operation of lowering and extending the telescopic boom 13. It can be located outside K.

When the telescopic boom 13 is contracted and the telescopic arm 14 is extended from the state shown by the chain line B, the work table 1 is moved as shown by the solid line C.
6 can be moved below the lower stage K1 of the bridge K,
Further, the workbench 16 can be positioned inside the lower stage K1 by rotating the workbench support member 16a.

A workable telescopic pole 20 is provided on the worktable 16 which can be moved to a desired position as described above. As shown also in FIG. 2, the work telescopic pole 20 is disposed extending upward from the worktable main body 16b, and is provided with a pole support member 21 which is disposed so as to be horizontally pivotable with respect to the worktable main body 16b. It comprises a swing lever 22 fixed to the support member 21 and extending in the horizontal direction, and a telescopic pole 23 pivotally supported at the upper end of the pole support member 21 so as to freely swing vertically.

The telescopic pole 23 is pivotally supported on the upper end member 21a of the pole support member 21 by a pivot pin 29 so as to be vertically swingable. The swing is freely pivotally supported between a storage position along the side surface of the workbench main body 16b as indicated by a chain line and a work position extended horizontally as indicated by a solid line. Each position is locked and held by locking means (not shown).

Further, the telescopic pole 23 has a base pole 23a whose base end is pivotally supported by the pole support member 21;
It comprises a distal pole 23b which is telescopic with respect to the base pole 23a and which can freely expand and contract. A ball screw shaft 24 is provided in the base pole 23a, and is screwed with a ball screw (not shown) provided in the tip pole 23a. Therefore, by rotating the ball screw shaft 24, the base pole 23a
, The tip pole 23b can be extended and contracted.

The base end of the ball screw shaft 24 projects outside the base pole 23a, and a pulley 25 is attached to this protrusion. Also, the base pole 23a
An electric motor 26 is disposed below the ball screw shaft 24 at the base end of the motor, and a pulley 27 is also attached to a drive shaft of the electric motor 26. A belt 28 is wound around each of the pulleys 25 and 27, and the ball screw shaft 24 can be rotated by rotating the electric motor 26.

Since the operator M operates the telescopic switch (not shown) provided on the workbench body 16b, the electric motor 26 can be rotated in a desired direction. The expansion and contraction operation of the expansion and contraction pole 23 can be performed by controlling the operation of the expansion and contraction switch. The rotational driving of the ball screw shaft 24 does not necessarily need to be performed using the driving force of the electric motor 26, and may be performed manually by the operator M, for example, by rotating a handle connected to the ball screw shaft 24. Good.

The working telescopic pole 20 has a tip end provided with working means 30 such as a keren device having a suction function or a coating nozzle.
Are configured to be detachable. The work means 30 is disposed on the work telescopic pole 20 such that the work direction is directed upward. In the case where the working means 30 is a Keren device, a hose 31 for supplying hydraulic pressure or air pressure to a motor for rotating the wire brush is connected to a hydraulic (pneumatic) supply means (not shown). I have. Also,
When the working means 30 is a painting nozzle, a hose 31 for supplying paint or compressed air to the painting nozzle is connected.

Next, a description will be given of a case where the bridge painting work vehicle 1 having the above-described configuration is used to carry out a scraping work on the back surface Kb of the bridge K with reference to FIG. In addition, FIG.
FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1, but for convenience of explanation, the outline of the bridge K is shown by a solid line, and the tip arm 14 d is omitted. In the case of performing the creeping work on the back surface Kb, first, the worker travels along the walking path Kd and the working path Ka of the bridge and moves to the work site. Then, the bridge painting work vehicle 1 is stopped in parallel with the bridge K on the back surface Kb, which is the work location. Next, outrigger jack 1
After the ground 5 is grounded and the vehicle body 11 is stably supported, the Keren device 30 is attached to the tip of the workable telescopic pole 20. Note that in this state, the work table 16 is in the working path Ka.
It is located above or near the work passage Ka.

Then, after the operator M is mounted on the workbench main body 16a, the telescopic boom 13 is raised and extended, and the swivel table 12 is turned.
4. The workbench 16 and the work telescopic pole 20 are positioned outside the bridge K. Next, after extending the extension arm 14 to lower the worktable 16 to a position below the back surface Kb of the bridge K, the worktable 16 is turned to perform the worktable 16 and the work extension pole. Turn 20 toward the inside of bridge K.

After the telescopic pole 23 in the storage position is raised to the working position, the worker M controls the turning operation of the swing lever 22 and the rotation operation of the electric motor 26, thereby turning the keren device 30. It can be moved in the range indicated by the oblique line D. Therefore, the worker M first moves the keren device 30 to a paint repairing position (portion where the paint has come off) within the range indicated by D on the back surface Kb, and peels off the old paint which is a work before the paint repair work. Perform work (Keren work).

After the completion of the cleaning operation in the range indicated by D, the workbench body 16b is moved in parallel by the distance L by performing the turning operation and the extending operation of the telescopic boom 13. In FIG. 3, instead of showing the telescopic boom 13, the center C of the swivel base 12 is used.
Only the center line CB of the telescopic boom, which is a line connecting P and the turning center of the workbench support member 16a, is shown.

By moving the work table 16 in this manner, it is possible to carry out the kernel work in the range indicated by the oblique line E in the work progress direction (outside the range indicated by D), which is the direction indicated by the arrow F. . In addition, this workbench main body 16b
The moving distance L is preferably a moving distance that does not cause a portion (blank portion) not included in the range indicated by D and E on the back surface Kb. L may be increased.

After performing the Keren work in this way,
The coating device is removed by removing the Keren device provided at the tip of the work telescopic pole 20 and replacing it with a coating nozzle.
In the case of continuing to perform the cleaning work and the painting work outside the range indicated by E, the body 11 is moved in the F direction because the extension amount of the telescopic boom 13 is insufficient. During this movement, the telescopic arm 14 is reduced,
The telescopic boom 13 is in a retracted state in which the telescopic boom 13 is parallel to the vehicle body 11,
Further, the outrigger jack 15 is also stored.

The work vehicle 1 for painting a bridge constructed as described above.
According to this, since the work table 16 on which the worker M boards can be small, the entire work vehicle 1 for painting a bridge can be made compact. In addition, the movement of the bridge painting work vehicle 1 itself, the movement of the work table 16 to the work position, and the like can be easily and quickly performed, so that work efficiency can be improved. In addition, a working means 3 for performing kerren work and painting work
Since 0 is located at a position away from the worker M, even if the work is on the upper side when viewed from the worker M, the peeled paint or the paint to be applied does not fall on the worker, thereby improving the work environment. be able to.

In the above-described embodiment, a case has been described in which the worktable 16 on which the workable telescopic pole 20 is mounted is configured such that the worker M can ride on it. However, the present invention is not limited to this. However, the work table does not necessarily need to be configured to allow a worker to board. Therefore, when the worker is configured not to be on the workbench, the turning operation of the pole support member 21 and the expanding and contracting operation of the telescopic pole 23 are performed by the worker who has boarded the bridge painting work vehicle 1 or the work passage. What is necessary is just to comprise so that it may be remotely operated by the worker who is in Ka.

Further, the base is not limited to a vehicle body which can travel freely as described above, but may be a base fixed or semi-fixed to a bridge. Further, the telescopic boom (first boom) 13
It is sufficient that at least the swivel table 12 can be freely raised and lowered, and the telescopic operation is not necessarily required.
In addition, the working means 30 is not limited to a keren device or a coating nozzle, but may be another working tool such as a wrench.

[0034]

As described above, the working device according to the present invention is provided with a work pole that can be horizontally turned and expandable and contractable in the horizontal direction on a work table that can move downward from the back of the bridge. Since the working means can be attached to the tip of the working pole, a wide working range can be obtained even if the working table is made small. Since the work table can be reduced in size, the entire work apparatus can be reduced in size, so that various works can be efficiently performed not only on a large bridge but also on a small bridge.

[Brief description of the drawings]

FIG. 1 is a side view of a bridge painting work vehicle which is an example of a work device according to the present invention.

FIG. 2 is an enlarged view of a working telescopic pole in the bridge painting work vehicle.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a side view of a bridge.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work vehicle for bridge painting 11 Body 12 Turntable 13 Telescopic boom 14 Telescopic arm 15 Outrigger jack 16 Workbench 20 Telescopic pole for work 30 Work means

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tsutomu Kameda 115-14 Maruyama, Ryoke, Ryoga, Ageo City, Saitama Prefecture Aichi Corporation Maruyama Plant

Claims (1)

[Claims] 1. A base, a swivel base horizontally rotatable on the base, a first boom at least up and down on the swivel base, and a tip end of the first boom. A second boom arranged to be freely expandable and contractible in a vertical direction; a work table arranged to be horizontally pivotable at a lower end portion of the second boom; and a horizontal turn and expansion and contraction to the horizontal direction on the work table. A working device, comprising: a work pole which is freely disposed and to which a working means can be attached at a tip end.