JP2821541B2 - Work vehicle for traveling on steel bars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle for traveling on a reinforcing bar which is mounted on a reinforcing bar mounted with a working machine for compacting concrete or roughening the surface.

[0002]

2. Description of the Related Art Conventionally, a vibrator has been used for compacting concrete at a construction site, and workers carry the work while carrying it. Also, in the roughing work of the cast concrete surface, the worker carries out the roughing work manually with a leveling tool.

[0003] This type of work is performed on a laid steel bar, and therefore has a very poor scaffolding, requires physical strength, and is severe for workers.

Accordingly, the present inventors have developed an apparatus for compacting and roughening concrete by using a working machine mounted on a traveling work vehicle without requiring human power.

[0005] However, the work vehicle conventionally used travels using wheels, and travels on rebar laid in a grid-like state.
If the wheel base of the wheels is an integral multiple of the laying pitch of the reinforcing bars, the front and rear wheels will ride on the reinforcing bars at the same time or sink between the reinforcing bars, and the vehicle body will move up and down while remaining almost horizontal. Become. As it deviates from the integral multiple, the height of the front and rear wheels will differ during running,
In addition to the vertical movement of each wheel, pitching of the vehicle body occurs.

For this reason, in the compacting machine, in order to vertically insert the vibrator, it is necessary to have a mechanism for canceling the pitching of the vehicle body. Otherwise, the insertion depth is inaccurate or the inclined insertion is required. As it goes deeper, it comes into contact with the adjacent rebar, and insertion becomes impossible. Also,
In the case of roughing, in order to level at a certain height, in addition to the vertical movement of the working part corresponding to the vertical movement of the vehicle body, the displacement amount due to the pitching of the vehicle body is added, so the height of the working part The adjustment is complicated, and it is necessary to perform the adjustment at a high speed. In addition, the leveling angle of the leveling plate portion changes due to pitching, which makes it difficult to hold the concrete horizontally and smoothly.

The present invention has been made in view of the above-described problems, and has as its object to provide a traveling work vehicle on a rebar that can travel while moving up and down horizontally without pitching when traveling on a laid rebar.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the intended object, a feature of the present invention is to provide a front wheel and a rear wheel which can roll on reinforcing bars laid in parallel. A work vehicle for traveling on a reinforcing bar provided with a work machine mounted on the vehicle body, wherein either the front wheel or the rear wheel can be moved in the front-rear direction of the vehicle body. Exists in work vehicles for traveling on rebar.

[0009]

The running vehicle on rebar according to the present invention can change the wheel base by moving the front wheel, or the rear wheel, back and forth. The work vehicle can move up and down horizontally while moving up and down horizontally by adjusting the wheel base once at the site if the rebar spacing is constant. To run.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 shows a schematic configuration of an example of a concrete compacting work machine of a work vehicle according to the present invention using a rod-shaped vibrator. In the figure, reference numeral 1 denotes a vehicle body 1A which is composed of four rubber wheels, front and rear wheels 2A. , 2A, 2B, 2B. A manipulator 3 is mounted on the vehicle body 1. The manipulator 3 is also called a balancer, and has a first joint 5 and a first joint 5 which are supported on the upper ends of the columns 4 and 4 erected on the vehicle body 1A so as to be able to turn horizontally. 5, a first arm 6 and a first arm 6 rotatably supported up and down.
And a second arm 8 rotatably supported at the distal end of the second arm 8 via a second joint 7.
A vibrator insertion / extraction device 9 is supported at the tip of the device.

The vibrator insertion / extraction device 9 vertically moves the rod-shaped vibrator 10 in the vertical direction. The rod-shaped vibrator 10 has a rod-shaped electric vibrator 12 at the lower end of a vibrator cylinder 11 made of a rod-shaped metal cylinder.
Is fixed, and the power cable 1 to the vibrator 12 is fixed.
Reference numeral 3 designates each joint fitting 5, 7 from the take-up reel 14 on the vehicle body 1A.
Vibrator cylinder 1 through upper guide rollers 15 and 16
1 is introduced at the upper end. The take-up reel 14 is configured such that the power cable 13 is wound and unwound according to the vertical movement of the rod-shaped vibrator 10.

The bar-shaped vibrator 10 may be a bar-shaped vibrator operated by air pressure fixed to the vibrator tube 11. In this case, a power cable having a built-in power air supply hose is used. Is done.

As shown in FIG. 3, the vibrator insertion / extraction device 9 has a box-shaped support base 20 which is open at the top and bottom, and is supported by the lower end of the second arm 8. A pair of vibrator feed rollers 21 and 21 are rotatably supported in the support base 20. The feed rollers 21 and 21 have concave grooves 22 for holding a vibrator having a substantially semicircular cross section on the outer periphery.
The bar-shaped vibrator 10 is vibrated in the vertical direction when the bar-shaped vibrator 10 is rotated by sandwiching the bar-shaped vibrator 10 in the grooves 22.

The two feed rollers 21 and 21 are supported by the support base 20.
It is driven by an electric motor 23 fixed outside, and is driven to rotate in mutually opposite directions by gears 24, 24. A rotary encoder 26 is attached to one feed roller shaft 25, and the insertion length of the vibrator 10 is measured by detecting the number of rotations. In addition, the supporting base 2
0 is a height measuring device 2 consisting of an ultrasonic distance meter facing downward
7 is fixed, so that the height of the support base 20 is measured.

As shown in FIG. 2, the vibrator insertion / extraction device supported by the manipulator 3 stops the work vehicle 1 along the work line L and at a certain interval from the work line L, and stops the work vehicle 1A. Is maintained horizontally at a constant height, compaction is performed at each compaction work point P ₁ , P ₂ ... _Pn on each compaction work line L of the work line L. The manipulator 3 is automatically controlled by a controller using a computer so that the bar-shaped vibrator 10 is aligned with each compaction work point P ₁ , P ₂ ... _Pn on the work line L. The device 9 is sequentially moved, and each point P ₁ , P ₂ .
... The bar-shaped vibrator 10 is inserted into a predetermined depth while feeding back the height information from the height measuring device 27 and the insertion length information from the rotary encoder 26 for each _Pn , and a necessary compacting length is used by a timer. And control it to perform a certain compaction.

The horizontal control of the vehicle body 1A is performed by the rear wheels 2B.
The wheel base can be adjusted up and down by moving the wheel back and forth. The left and right rear wheels 2B, 2B
As shown in FIG. 4, the connecting rod 30 is fixed to axles 32, 32 supported by left and right wheel bearings 31, 31 fixed to both ends of the connecting rod 30. Each of the wheel bearings 31, 31 is formed integrally with a slide base 33, 33, and each of the slide bases 33, 33 is a rod-shaped slide guide 34, 34 fixed to the lower surface of the vehicle body 1A in the front-rear direction. Is slidably supported.

The center rear surface of the connecting rod 30 and the vehicle body 1A
A hydraulic cylinder 35 is installed between the hydraulic cylinders 3
5, the two slide tables 33 and the wheel bearing 31
Are moved back and forth to adjust the wheel base up and down.

On both axles 32, 32, an engine 40 is provided.
Is driven by the transmission 41 and the propeller shafts 42, 4
2. The power is transmitted through bevel gears 43 and 44 provided between each propeller shaft 42 and the axle 32. The propeller shaft 42 has a telescopic shaft 45 that expands and contracts in its longitudinal direction and does not rotate in the axial direction, and absorbs a change in the distance between the transmissions 41 due to the forward and backward movement of the axle 32. .

The work vehicle for traveling on a reinforcing bar configured as described above has a front and rear wheel 2A, when the wheel base X is not an integral multiple of the pitch a of the laid reinforcing bar 50, as shown in FIGS. When one of the 2Bs is directly above the rebar 50, the other is at a position deviated from just above the rebar 50, the vehicle body 1A inclines back and forth when stopped, and proceeds while repeating pitching during traveling. In such a case, the wheel base can be adjusted to an integral multiple of the pitch of the laying rebar 50 by moving the rear wheel 2B forward or backward, and as shown in FIG. 7, the vehicle body 1A becomes horizontal when stopped, During traveling, the front and rear wheels 2A and 2B simultaneously climb over the reinforcing bar 50, and travel while moving up and down while maintaining the horizontal level.

[0021]

As described above, the work vehicle for traveling on rebar according to the present invention can adjust the wheel base by moving one of the front and rear wheels back and forth, thereby providing an integral number of rebar laying pitches. When traveling on laid steel bars of the traveling vehicle body, the vehicle body does not produce pitching,
The mounted working device only moves up and down together with the vehicle body, so that a working machine that performs a work perpendicular or parallel to the work surface can reduce the amount of ground fluctuation and improve the work accuracy.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of an example of a work vehicle according to the present invention.

FIG. 2 is a plan view showing a working state of the work vehicle.

FIG. 3 is a plan view showing a rebar insertion / extraction device of the work vehicle.

FIG. 4 is a partially cutaway plan view showing a support mechanism for a rear wheel of the work vehicle.

FIG. 5 is a partially longitudinal side view of the same.

FIGS. 6A and 6B are side views showing a pitching traveling state of the work vehicle.

FIG. 7 is a side view showing a traveling state of the work vehicle in which pitching does not occur.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 work vehicle 1A body 2A front wheel 2B rear wheel 3 manipulator 4 support 5 first joint 6 first arm 7 second joint 8 Take-up reel 15, 16 guide roller 20 support base 21 feed roller 22 concave groove 23 electric motor 24 gear 25 feed shaft roller 26 rotary encoder 27 height detector 30 connecting rod 31 wheel bearing 32 axle 33 slide stand 34 slide guide 35 hydraulic pressure Cylinder 40 Engine 41 Transmission 42 Propeller shaft 43,44 Bevel gear 45 Telescopic shaft 50 Reinforcing bar

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 21/08

Claims (2)

(57) [Claims] 1. A work vehicle for traveling on rebar comprising a front wheel and a rear wheel which can roll on rebars laid in a parallel arrangement under a vehicle body and a work machine mounted on the vehicle body. A work vehicle for traveling on rebars, characterized in that one of the rear wheels can be moved in the front-rear direction of the vehicle body. 2. A front-rear moving wheel is supported by a slide table, and the slide table is slidably supported by a slide guide fixed to a vehicle body, and is moved in a front-rear direction by a hydraulic cylinder. The work vehicle for traveling on rebar according to claim 1.