JPH0629364Y2 - Direction changing mechanism in concrete working equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a direction changing mechanism for changing the running direction of a concrete working device which runs on a reinforcing bar to perform concrete placing work, concrete leveling work, and the like.

[Prior Art] Conventionally, as a concrete working device of this type, for example,
A leveling mechanism for leveling the concrete surface is mounted on a running body that is driven by the rotational movement of wheels or tracks that are arranged facing each other on its own side, and along a rebar covered with cast concrete. There is known a working device in which the leveling mechanism is driven while the running body is running to sequentially level the surface of the poured concrete.

Then, in such a working device, when changing the traveling direction, the worker lifts the working device to change it, or changes it by rotating the wheels and the caterpillars facing each other in opposite directions. It is generally performed, and inside, there is a turntable device provided on the lower surface side of the traveling body so as to be vertically movable,
There has also been proposed a working device in which the working device is floated above a concrete surface by descending it toward a reinforcing bar covered with concrete, and then the turntable device itself is rotated to change the direction.

[Problems to be Solved by the Invention] However, each of the above-mentioned direction changing methods has the following drawbacks, and it is still difficult to say that the method is the most suitable as the direction changing means of the concrete working apparatus.

First, when a worker lifts the work device to change the direction, the weight of the work device that can be lifted by a limited number of workers is naturally limited, and in addition, each time the direction is changed. The drive of the work equipment must be stopped, and the work efficiency is significantly impaired.

Further, when the wheels that face each other are rotationally driven in opposite directions to change the direction, although the above-mentioned drawback of the direction change by the manual work is eliminated, the contact point between each wheel and the reinforcing bar is changed during the direction change. Since the load of the entire working device is concentrated on the work, the arrangement of the reinforcing bars may be disturbed.

Then, in the work device in which the turntable device levitates the work device to change the direction, the work device is levitated if the installation location of the turntable device does not exactly match the position of the center of gravity of the work device. There is a risk of falling when doing so, so it is of course necessary to consider the weight balance around the turntable device at the time of design, it is necessary to monitor the change in weight balance due to adhesion of concrete during work, and If the specifications of the working mechanism are changed, the weight balance must be rebalanced. in addition,
Since the turntable device itself has to be provided with a rotation driving means such as a motor, there has been a drawback that the structure of the momentum is complicated and maintenance thereof is time-consuming.

The present invention has been made in view of the above circumstances, and it is possible to change the direction without impairing the work efficiency and without disturbing the arrangement of the reinforcing bars, and it is also necessary to consider the weight balance of the traveling body. It is an object of the present invention to provide a direction changing mechanism for a concrete working device that does not have a complicated rotating mechanism.

[Means for Solving the Problems] The present invention for solving the above problems is achieved by mounting a concrete working mechanism on a traveling body that travels on a reinforcing bar by the rotational motion of at least a pair of wheels arranged to face each other. In the concrete working device, the direction changing mechanism in the concrete working device for converting the traveling direction of the traveling body, comprising: wheel driving means for rotating the wheels of the traveling body independently of each other in the forward and reverse directions; A support leg that is attached to a substantially central position between the wheels so as to be vertically downwardly movable to a position that presses the reinforcing bar and is rotatable relative to the traveling body in a horizontal plane, and the support leg. And a supporting leg up-and-down moving mechanism for moving the leg in the vertical direction.

[Operation] According to the above-described configuration, the concrete working apparatus causes the load to be applied to each wheel by moving the support leg vertical movement mechanism to move the support leg downward to a position where the support leg presses the reinforcing bar. It is supported in a state of being dispersed in the supporting legs.
Then, in this state, by rotating one side of each of the wheels facing each other in the forward direction and rotating the other side in the reverse direction, the supporting legs are relatively rotatable with respect to the traveling body. Is added to rotate the traveling body side around the support leg that presses the reinforcing bar, and the direction of the concrete working device is changed.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 1 shows a concrete leveling device (concrete working device) equipped with the direction changing mechanism of this embodiment. In the following description, prior to describing the details of the direction changing mechanism, the leveling device is first described. The general configuration of will be described.

As shown in FIG. 1, the leveling device 1 includes two stabilizers 2 arranged on the lower surface of the leveling device 1 on both sides thereof while abutting the reinforcing bars R covered with the cast concrete C1. An inclination adjusting mechanism 6 and a leveling mechanism (a leveling mechanism) are provided on a flat plate-like support base (traveling body) 5 that travels in the direction of arrow Y1 in the figure by the rotational movement of a pair of wheels 4 rotatably supported by a wheel frame 3 provided. A working mechanism) 7 and a direction changing mechanism 8 are provided respectively, and the tilt adjusting mechanism 6 is a reference laser beam emitted from a laser level device (not shown) installed on a floor, a pillar or the like (not shown). 3 laser receivers 9 for receiving
Based on the output signal of 11, the both ends of the horizontal rod 12 that suspends the leveling mechanism 7 are moved up and down by the actuators 13 and 14, and the horizontal rod 12 is rotated around its axis by an actuator (not shown). The inclination of the leveling mechanism 7 is always matched with a predetermined ceiling level. Further, the leveling mechanism 7 includes the horizontal rod 1
As shown in more detail in FIG. 2 to FIG. 3, on the support plate 15 suspended from 2 in order from the running direction of the leveling device 1 (the direction of the arrow Y1 in each figure), the placed concrete C is placed.
(1) A leveling auger 16 that scrapes off the convex portion of the surface and transfers it toward the center of itself, and distributes it to the concave portion; Refrigerating auger 17 for recirculating to both ends
And a leveling plate 18 for further smoothing the roughened concrete surface of the leveling auger 16 and a tamper 20 that is vertically reciprocated by a cam mechanism 19 to sequentially tamper the concrete surface. It will be done. In the figure, reference numeral 21 is a generator serving as a power source of the leveling device 1, 22 is a control device for controlling the operation of each part of the leveling device 1, and 23 is a wireless remote action receiver.

Then, as shown in FIG. 1, the direction changing mechanism 8 is
A motor (wheel drive means) 24 attached to each wheel frame 3 that supports each wheel 4 and the lower surface of the support 5 are arranged at substantially the center position on the axis connecting the axles 4a of each wheel 4. And a rotation angle detecting mechanism 26 shown in more detail in FIGS. 6 to 7. As shown in detail in FIGS. 1 and 3, the motor 24 is rotatable in both forward and reverse directions, and is attached to a drive pulley 27 fitted to a motor shaft (not shown) and an axle 4 a of each wheel 4. A belt 29 is wound around the driven pulley 28, so that the wheels 4 can rotate forward and backward independently of each other. Further, as shown in FIGS. 4 and 5, the support leg 25 has a rib 31 appropriately disposed on the inner peripheral side of an outer ring 30 having a hollow cylindrical shape that opens in the vertical direction. A vertical movement actuator (support leg vertical movement mechanism) 32 whose central portion is attached to the upper surface of the support base 5
It is adapted to be hung on the lower surface side of the support base 5, which is connected via the screw shaft 33. The upper part of the screw shaft 33 is screwed into a drive nut 32a which is rotated by a drive source (not shown) inside the vertical movement actuator 32, whereby the support leg 25 moves up and down as the drive nut 32a rotates. It is free to move. In addition, as shown in FIG. 6, the lower end of the screw shaft 33 and the central portion of the support leg 25 are connected to the bearing 3
4 are rotatably connected to each other via a shaft 4, and their movement in the axial direction is restricted. The rotation angle detection mechanism 26 includes an annular race ring 35 attached to the upper surface of the support leg 25, and a roller support base 36 fitted to the lower portion of the screw shaft 33 and fixed with a knock pin (not shown). , A guide roller 37 rotatably supported by the roller support base 36
The guide roller 37 is configured to roll on the upper surface of the race ring 35 as the screw shaft 33 rotates. Then, as shown in FIG. 7, a rotation angle detector 38 is provided on the side of the guide roller 37.
The rotation angle detector 38 is integrally fixed to the screw shaft 33, and its input shaft 38a is connected to the guide roller 37 via a belt 39.
The rotation amount of the guide roller 37 input to a is converted into an electric amount and output to the control device 22. As the rotation angle detector 38, a well-known phase detecting means such as a rotary encoder or a resolver is used.

In the leveling device 1 configured as described above, the wheels 24 are rotationally driven in the same direction by the motor 24 so that the leveling device 1 travels in the direction of the arrow Y1 and the leveling mechanism 7 is tilted. The leveling mechanism 7 is driven while the inclination adjusting mechanism 6 is driven so that the height always coincides with a predetermined ceiling level, whereby the surface of the cast concrete C1 is leveled successively.

When it is necessary to change the direction of the leveling device 1 while the leveling work is continued, first, the rotation of the wheels 4 is stopped and the vertical movement shown in detail in FIGS. 4 to 5 is performed. The support leg 25 is lowered by the actuator 32 to a position substantially flush with the lower surface of the stabilizer 2 and abuts on the reinforcing bar R. As a result, the leveling device 1 has its load
5, the wheel 4 and the stabilizer 2 are supported in a dispersed state. Then, in this state, the motor 2
One of the wheels 4 is driven in the forward direction and the other is driven in the reverse direction to rotate the wheels 4 in the opposite directions, whereby the leveling device 1 leaves the supporting legs 25 rotatably provided with respect to the screw shaft 33. It is rotated around the support leg 25. At this time, the rotation angle of the leveling device 1 is detected by the rotation angle detector 38 into which the rolling amount of the guide roller 37 rolling on the upper surface of the race ring 35 is input and sent to the control device 22. Reaches a predetermined value, the controller 22 issues a stop command to each motor 24 to stop its rotation, and the vertical movement actuator 32 is driven to support the support leg 25.
Is raised, which completes the change of direction. In this case, the surface of the cast concrete C1 is roughened by the wheels 4 and the stabilizer 2, but since it is smoothed again by the smoothing work after the end of the direction change, no problem occurs.

As is apparent from the above description, according to the direction changing mechanism 8 of the present embodiment, the direction change can be performed without depending on the manual work and without stopping the leveling mechanism 7 one by one, so that the work efficiency is improved. It will not be damaged. Further, during the direction change, the leveling device 1 is stably supported in a state in which the load is distributed to the support legs 25, the wheels 4 and the stabilizers 2, so that the contact surface of each wheel 4 with the reinforcing bar R is in contact. Since each wheel 4 does not reversely move while the total load of the leveling device 1 is still applied, disorder of the arrangement of the reinforcing bars R is prevented, and the supporting legs 25 allow the entire leveling device 1 to move through the reinforcing bars R. Since it is not levitated from above, it is not necessary to consider the weight balance around the support leg 25. Further, since the supporting leg 25 side does not need any rotation driving means, its structure is simplified and therefore maintenance thereof is extremely easy.

In the direction changing mechanism 8 of this embodiment, the wheels 4 are
However, the direction changing mechanism of the present invention is not limited to this.
It is of course applicable to those having two pairs or more wheels. Further, although the wheels 4 are rotated in the reverse direction by the normal rotation and the reverse rotation of the motor 24, it is naturally conceivable that the wheels are rotated by the mechanical inversion mechanism.
Various other shapes, mounting structures, etc. can be considered.

Further, in the present embodiment, an example in which the direction changing mechanism is applied to the leveling device 1 for leveling concrete C1 has been described, but the direction changing mechanism of the present invention is not limited to this, and for example, concrete Naturally, it is also applied to a work device for performing other concrete work such as a concrete pouring device for pouring.

[Effects of the Invention] As described above, in the present invention, after the support leg is moved downward by the support leg vertical movement mechanism, the wheels on one side of the traveling body are normally rotated and the other side is reversed. Due to
Since it is possible to change the direction of the concrete working device without depending on the manual work and without stopping the work of the working mechanism one by one, the work efficiency is not deteriorated by the direction change. Further, since the supporting leg presses the reinforcing bar, the concrete working device in the direction change is stably supported in a state where the load is distributed to the wheel and the supporting leg, so that the arrangement of the reinforcing bar is disturbed by the rotational movement of the wheel. Also, it is not necessary to consider the weight balance around the supporting legs of the traveling body. Further, since it is not necessary to provide any rotation drive means on the support legs and the support legs are rotatable relative to the traveling body, the rotation of the traveling body is not obstructed and the structure thereof is of course simplified. Therefore, its maintenance becomes extremely easy.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention.
FIG. 1 is an external view of a leveling device incorporating the direction changing mechanism of the present invention, FIG. 2 is a side view of the leveling device, FIG. 3 is a plan view of the leveling device, and FIG. FIG. 5 is a side view showing a mounting portion, FIG. 5 is a plan view of a support leg, FIG. 6 is a partially enlarged view showing in detail a connecting portion between the support leg and the support base, and FIG. 7 is a line AA in FIG. FIG. 1 ... Concrete leveling device (concrete working device), 4 ... Wheels, 5 ... Support base (running body), 24 ...
Motor (wheel drive means), 25 ... Support leg, 32 ... Vertical movement actuator (support leg vertical movement mechanism).

 ─────────────────────────────────────────────────── --- Continuation of front page (56) References JP-A 61-126269 (JP, A) JP-A 2-44408 (JP, A) JP-A 1-295972 (JP, A) JP-A 62- 146363 (JP, A) JP-B-51-42855 (JP, B2) JP-B 36-26540 (JP, Y1) JP-A-50-17280 (JP-A-51-99433) A micro film (JP, U) that captures the contents of a book and drawings

Claims (1)

[Scope of utility model registration request] 1. A concrete working apparatus in which a concrete working mechanism is mounted on a running body that runs on a reinforcing bar by the rotational movement of at least a pair of wheels arranged opposite to each other, and the running direction of the running body is changed. A direction changing mechanism in a concrete working device, which is a wheel drive means for rotating each wheel of the traveling body independently of each other in the forward and reverse directions, and a substantially central position between the wheels of the traveling body, in a vertically downward direction. A support leg movably attached to a position where the reinforcing bar is pressed and relatively rotatable with respect to the traveling body in a horizontal plane; and a support leg vertical movement mechanism for vertically moving the support leg. A direction changing mechanism in a concrete working device comprising: