JP2662624B2 - Travel mechanism of concrete working equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling mechanism of a concrete working device that travels while supporting a concrete working device that performs a concrete placing operation, a concrete leveling operation, and the like.

[Prior Art] Among various types of concrete work performed at a concrete construction site, in particular, concrete leveling work has conventionally relied on manual work in which workers carry work tools suitable for these works. Therefore, various problems have been pointed out, such as a large burden imposed on an operator, a large variation in leveling accuracy, and a decrease in skilled earthwork makes it difficult to secure it year by year.

Therefore, the present applicant has proposed a self-propelled concrete leveling device (hereinafter simply referred to as a leveling device) in order to mechanize the above-mentioned concrete leveling operation (Japanese Patent Application No. 63-1261).
97 (JP-A-1-295972).

Hereinafter, the leveling device will be briefly described with reference to FIG. 4. In the leveling device, a pair of wheels 1 disposed on both sides and two support plates 2 disposed on the lower surface are covered with concrete C. Rebar R
And a leveling mechanism composed of a leveling auger 4, a recirculating auger 5, a leveling plate 6 and a pattern 7 8 and an inclination for adjusting an inclination angle of the leveling mechanism 8 with respect to the concrete C surface based on output signals of three laser receivers 9 to 11 for receiving a reference laser beam emitted from a laser level device (not shown). In the state where the wheel 1 is rotated by the motor 13 to advance the whole in the direction of the arrow Y1 in the figure, first, the leveling auger 4 is rotated from the surface of the concrete C by rotating the leveling auger 4. While scraping excess concrete and transferring it to the center,
The concrete C accumulated in the center of the auger 4 is successively refluxed to both ends thereof by the rotation of the reflux auger 5, and the concrete C is redistributed from the convex portion to the concave portion of the surface of the concrete C to perform a rough leveling. Then, the surface of the roughened concrete C is traced by a leveling plate 6 to smooth the surface, and the tamper 7 is alternately moved up and down by a cam mechanism 14 so that the smoothed surface of the concrete C is tamped. Has become.

As described above, the leveling device can continuously apply the surface of the concrete C from the rough leveling to the tamping with the movement of the support 3, thereby contributing to significant labor saving of the leveling operation. There are great expectations for what to get. FIG. 4 shows the case where the leveling device travels on the reinforcing bars R. However, when the concrete C is directly poured into the formwork or the soil without assembling the reinforcing bars R, the bottom surface of the formwork or The wheel 1 and the support plate 2 are in contact with the upper surface of the soil to support the leveling device. Reference numeral 15 in the figure is
First, the applicant filed an application (Japanese Utility Model Application No. 63-102683 (Japanese Utility Model Application No. 6-29).
No. 364)) is a direction changing mechanism, which is disposed on the lower surface of the support base 3 so as not to disturb the arrangement of the reinforcing bars R when rotating the wheels 1 in opposite directions to change the direction of the leveling device. The rotatable outer ring 16 is lowered until it comes into contact with the rebar R, and the load of the leveling device is distributed to the wheel 1, the support plate 2, and the outer ring 18. Further, in the figure, reference numeral 17 denotes a generator serving as a power source of the leveling device, 18 denotes a control device for controlling the operation of each part of the leveling device, and 19 denotes a receiver for wireless remote control.

[Problems to be Solved by the Invention] By the way, in the above-described leveling device, the support plate 2 provided on the lower surface of the support base 3 for stabilizing the posture during traveling is always along the upper surface of the reinforcing bar R or the soil. The power of the wheel 1 must be determined to be relatively large in consideration of the power loss due to the sliding resistance of the support plate 2, and no displacement occurs due to the sliding resistance when the reinforcing bar R is assembled. It is necessary to build the structure to a certain degree as described above.
Layout restrictions such as the need to take care that obstacles such as the outlet of embedded conduit and stud bolts do not protrude on the top or on the soil,
It requires some care in handling. Therefore, there has been a demand for the development of a traveling mechanism that allows the leveling device to easily travel without paying these attentions.

The present invention has been made under such a background,
When running a concrete working device such as the leveling device described above, there is no sliding resistance between the support plate and the reinforcing bar or the upper surface of the soil, etc., and the arrangement of obstacles in the running route is also to some extent. It is an object to provide an acceptable traveling mechanism.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a traveling mechanism of a concrete working device that travels while supporting a concrete working device that performs concrete placing work, leveling work, and the like. A thrust applying means for applying a thrust to the working device to cause the concrete working device to travel, and a thrust applying means disposed parallel to each other along a running direction of the concrete working device to support the concrete working device, and At least two support plates movably provided in the traveling direction, and support plate elevating means connected to these support plates to alternately raise and lower each support plate in a direction intersecting with the respective movement directions; And a support plate urging means for urging the support plate forward in the traveling direction of the concrete working device.

[Operation] In order to run the concrete working device by the running mechanism having the above-described configuration, each support plate is brought into contact with a running surface such as a reinforcing bar or a dirt upper surface to support the concrete working device.
Each support plate is alternately moved up and down by the support plate elevating means while applying a thrust to the concrete working device by the thrust applying means.
Then, each support plate is alternately released from the reinforcing bars and the like in accordance with the ascending and descending operation, is fed out to the front side in the traveling direction of the concrete working device by the support plate urging means, and is again landed on the reinforcing bars and the like. Along with such a lifting operation, the concrete working device travels by utilizing the sliding between the support plate and the concrete working device while being alternately supported by the support plates that are alternately landed on the reinforcing bars or the like. I do.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the traveling mechanism according to the present invention is applied to the concrete leveling device shown in FIG. 4 described above. Therefore, the same components are denoted by the same reference numerals, and description thereof will be omitted. .

As shown in FIGS. 1 and 2, the traveling mechanism according to the present embodiment leveles a pair of wheels 1 disposed on both sides of the support base 3 in the same manner as the leveling device described above, and runs the entire device. While being used as a thrust applying means, a total of four support plates 20 to 23 are provided in the vicinity of each wheel 1 on the lower surface of the support plate 3 in parallel with each other along the traveling direction of the support base 3, Each support plate 20
To 23 are connected to the support base 3 via four linear guides 24 and a support plate elevating mechanism 25.

As shown in more detail in FIG.
24 is a rail 26 extending along the traveling direction of the support 3,
Movable tables 27 and 28 attached to the rail 26 via balls or cylindrical rollers (not shown) and slidably provided along the rail 26.
By connecting to the upper portions of the support plates 20 to 23 (only the support plate 20 is shown in FIG. 1), the support plates 20 to 23 are movably supported in the traveling direction of the support base 3. Further, the movable table 27 is connected to a telescopic shaft 29a of an air spring (support plate urging means) 29 attached to the upper surface of the rail 26 and is repelled forward of the rail 26.
Numeral 23 is always biased forward in the running direction of the support 3.

On the other hand, the support plate elevating mechanism 25 is disposed opposite to the rail 26 of each linear guide 24 as shown in FIG.
Further, as shown in FIG.
The lower ends of the levers 32 and 33 rotatably provided around the center 0 and 31 are connected to the rails 26 of the linear guides 24 and the pins 34 and 35, respectively.
Are rotatably connected via a link, thereby forming a four-joint link including the rail 26, the levers 32 and 33, and the support base 3, and a spring 36 between the upper end of the lever 33 and the support base 3. A roller 37 rotatably provided at the upper end of the lever 32 and a cam 38 opposed to the roller 37 are brought into close contact with each other. As shown in more detail in FIG. Is connected to a cam drive motor 40 provided at the center of the front part of the support 3 via a cam shaft 39 supported by the support 3, and each cam 38 is rotated by the cam drive motor 40 to 1. As shown in FIG.
By swinging the support plate 20 around the support plate 20,
23 are moved up and down between a position immediately below the support 3 and a position obliquely below the support 3. The timing at which each of the support plates 20 to 23 moves up and down is adjusted by shifting the phase when each cam 38 is attached to the camshaft 39. More specifically, the support plate 20 located outside the support base 3 in the width direction is adjusted. , 23 are driven in the same phase, and the cams 38 driving the support plates 21
Are 180 degrees different from those for driving the support plates 20, 23, and the support plates 20, which form a pair at the left and right ends of the support 3,
21 and 22 and 23 are alternately moved up and down, respectively.

In order to run the leveling device using the traveling mechanism configured as described above, first, as shown in FIG. 3A, the support plates 20 to 23 (FIGS. 3A to 3H) are used. In the state in which only the support plates 20 and 21 are shown), the support plate 3 in which the lower surfaces of the support plates 20 to 23 are brought into contact with the reinforcing steel R covered with the concrete C in a state where all of the support plates 20 and 21 are lowered directly below the support plate 3 is shown. It is supported on the surface of concrete C. At this time, the support table 3 of the support plates 20 to 23 is used.
As for the position in the traveling direction, it is assumed that the support plates 20 and 23 are at the rearmost ends in the respective moving ranges, and the support bases 21 and 22 are at the forefront ends in the moving ranges.

From this state, each wheel 1 is rotated in the same direction by the motor 13 (see FIG. 4), and each cam 38 is rotated by the cam drive motor 40. Then, as shown in FIG. 3 (b) to FIG. 3 (c), the support plates 20 to 23
The outer support plates 20 and 23 are respectively raised and lowered with respect to the rebar R, and are pushed out by the air spring 29 to the front in the traveling direction of the support 3 and then again as shown in FIG. The rebar R is landed. During this time, the support table 3 is moved forward while being supported by the support plates 21 and 22 as the wheel 1 rotates.
Since the support plates 1 and 22 are movably connected to each other by the linear guide 24, the support plates 21 and 22 do not slide on the reinforcing bar R due to the frictional force generated between each lower surface and the reinforcing bar R. Stops in place and supports 3 are linear guides
Using the sliding motion between 24 rails 26 and movable tables 27 and 28,
The air spring 29 moves forward while compressing it.

In this way, the support 3 moves forward, and as shown in FIG. 3 (e), when the support plates 20 to 23 are again aligned with the position immediately below the support 3, the next step is as shown in FIG. 3 (f). Or 3 (g)
As shown in (1), the inner support plates 21 and 22 are moved up and down with respect to the rebar R, and are pushed out by the air spring 29 to the front in the traveling direction of the support 3. During this time, the support 3
While being supported by the support plates 20 and 23, it advances with the rotation of the wheel 1, while the support plates 20 and 23 are stopped in a fixed position by a frictional force generated between the support plates 20 and 23. The air spring 29 that first extrudes the support 23 in the running direction of the support 3 is also compressed.

Then, as shown in FIG. 3 (h), when the support plates 21 and 22 are landed on the reinforcing bar R, the support base 3 and the support plates 20 to 23 are formed.
Is the same as the positional relationship at the start of traveling shown in FIG. 3 (a). Thereafter, the same procedure as described above is repeated from this state, and the support base 3 continues to travel on the reinforcing bar R. .

As is clear from the above description, according to the traveling mechanism of the present embodiment, the smoothing device smoothly moves between the movable bases 27 and 28 of the linear guide 24 connected to the support plates 20 to 23 and the rail 26. The vehicle travels by a smooth sliding operation, and no sliding resistance is generated between the support plates 20 to 23 and the reinforcing bar R. For this reason, the running resistance of the leveling device is drastically reduced, and the power required to rotate the wheels 1 is greatly reduced, and it is not necessary to consider the displacement of the reinforcing bar R due to running, and the labor for assembling the reinforcing bar R is also reduced. Is done. Furthermore, in the traveling mechanism of the present embodiment, obstacles can be overcome by the lifting and lowering operations of the support plates 20 to 23. Therefore, even in the traveling path of the leveling device, other than the landing points of the support plates 20 to 23. Then, there is no problem even if some obstacles are arranged.

Although the present embodiment has been described in particular for the case where the leveling device is run while being supported by the reinforcing bar R, the traveling mechanism of the present invention is not limited to this, and the leveling device is mounted on the bottom of the formwork or the top of the soil. Of course, it is possible to use even if it supports. In addition, the concrete working device is not limited to the leveling device, but may be a concrete casting device or the like.

Furthermore, the configuration, shape, and the like of each part in each part of the present embodiment are merely examples, and these may be variously changed in accordance with the specifications of the concrete working device to be applied. For example, if the concrete working device is small and light, and it is sufficient to only support the support base already supported by the wheels with the support plate, two support plates are arranged at the center in the width direction of the support base. A sufficient effect can be expected simply by raising and lowering alternately. Further, the propulsion force applying means is not limited to the wheels, but a crawler or the like can be used. The support plate lifting / lowering means and the support plate urging means can be easily replaced with a linear motion type actuator such as a hydraulic cylinder. In the present embodiment, the lower surfaces of the support plates 20 to 23 are formed in a linear shape. However, the lower surfaces of the support plates 20 to 23 are formed in a corrugated shape, for example, in accordance with the pitch of the reinforcing bar R. The reinforcing bar R may be engaged with the reinforcing bar R. In this case, the support plate
Slippage when 20 to 23 are in contact with the reinforcing bar R is more reliably prevented, and an improvement in efficiency can be expected.

[Effects of the Invention] As described above, according to the traveling mechanism of the present invention,
Each of the support plates is alternately moved up and down by the support plate elevating means, and is pushed forward by the support plate urging means in the traveling direction of the concrete working device, whereby the concrete working device is pushed by the supporting plate pushed forward in the traveling direction. In addition to being able to alternately support, the thrust applied from the thrust applying means enables continuous running using the slip between the support plate and the concrete working device.
In this case, since each support plate does not move in contact with the reinforcing bar or the like, no sliding resistance acts between the support plate and the reinforcing bar or the like, and therefore, it is necessary to run the concrete working device. The power is greatly reduced, and it is not necessary to consider the deviation when assembling the reinforcing bar, and the labor for assembling the bar is also greatly reduced. Furthermore, according to the present invention, since it is possible to get over obstacles by the lifting and lowering operation of each support plate, even if it is within the traveling path of the concrete working device, it is possible to remove obstacles other than the landing point of each support plate. There is no problem in arranging them, so that the restrictions imposed on the layout of the embedded conduit, stud bolts and the like are considerably eliminated.

[Brief description of the drawings]

FIG. 1 is a side view showing the structure of one embodiment of the present invention, FIG. 2 is a front view thereof, FIGS. 3 (a) to 3 (h) are views showing the operation thereof, and FIG. It is a perspective view which shows the schematic structure of an apparatus. 1 ... wheels (thrust applying means), 20, 21, 22, 23 ... support plate, 25 ... support plate elevating mechanism, 29 ... air spring (support plate urging means).

Claims (1)

(57) [Claims] 1. A traveling mechanism of a concrete working device that travels while supporting a concrete working device that performs concrete placing operation, concrete leveling operation, and the like, wherein the concrete working device is provided with a thrust to apply the thrust to the concrete working device. Thrust applying means for running, and at least two sheets provided in parallel with each other along the running direction of the concrete working device to support the concrete working device and movably provided in the running direction of the concrete working device. A support plate, a support plate elevating means connected to each of the support plates and alternately raising and lowering each support plate in a direction intersecting with each moving direction, and a front side in the traveling direction of the concrete working device for moving each of the support plates. A traveling mechanism for a concrete working device, comprising: a support plate urging means for urging the work piece.