JPH0999426A - Tension plate drawing apparatus for concrete secondary product molding form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for automatically cutting a tension reinforcing bar and drawing tension plate in a form for molding concrete secondary product. SOLUTION: The tension plate drawing apparatus for a concrete secondary product molding form comprises a cutter mechanism 26 having a cutter 36 vertically movable on a long lateral truck 14 which travels and retreats to a form installed at a home position, a chuck mechanism having a pair of openable chucking pawls and vertically moving integrally with the mechanism 26. The tension reinforcing bar is cut by the rotations of the cutter 36 and the form in the state that the truck 14 is approached to the form. After the cutting, the tension plate is held by the chuck mechanism and drawn from the form, the cutting of the bar and the drawing of the plate are automatically conducted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension plate withdrawal device for removing a concrete secondary product forming mold for a concrete pole from a mold.

[0002]

2. Description of the Related Art For example, in the production of a concrete pole, as shown in FIG. 9, a tension bar 3 is stretched between tension plates 2 attached to the end of a formwork 1 to prestress the concrete pole 4. Therefore, when the concrete pole 4 is released from the mold, a step of cutting the tension bar 3 at the circumferential groove 5 of the tension plate 2 and then pulling out the tension plate 2 from the mold 1 is required. .

Hitherto, the tension muscles have been cut manually by an operator using a high-speed cutter, and the tension plate has been removed by using a burl.

[0004]

As described above, the conventional removal of the tension plate is performed manually by a worker, so that there is a problem that the work efficiency is low and the work is dangerous.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a tension plate pulling device for a concrete secondary product molding formwork capable of automatically cutting the tension muscles and removing the tension plate, thereby improving work efficiency and safety. .

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a dolly which moves forward and backward with respect to a tension plate of a concrete secondary product molding form which is installed so as to rotate at a fixed position. A stopper that comes into contact with the tension plate is provided, and the cutter can move up and down on the dolly, and the cutter rotates when the dolly is stopped when the stopper comes into contact with the tension plate. A cutter mechanism that cuts muscles and moves up and down in synchronization with the cutter mechanism,
After the tension muscle is cut, the tension plate is sandwiched, and a chuck mechanism for pulling out the tension plate from the mold by pushing the flange of the mold to retract the carriage is adopted.

[0007]

[Operation] When the bogie is moved forward with respect to the concrete secondary product molding form set to rotate at a fixed position and the stopper comes into contact with the tension plate and stops, the cutter mechanism operates and the cutter moves to the cutting position. At the same time, the tension muscle is cut at the tension plate portion by the rotation of the mold, and when the cutter is raised to the retracted position after cutting, the chuck mechanism is raised to clamp the tension plate from both sides.

At the same time, the pull-out cylinder extends and presses the flange of the form, so that the carriage and the chuck mechanism retract from the form, the clamped tension plate is pulled out from the form, and the retracted position of the carriage. The tension plate is conveyed to.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 5, turning rollers 11, 11 for mounting a mold 1 on which a concrete secondary product has been molded are arranged side by side, and a pulling device 12 is provided with an end tension plate 2 of the mold 1. On the other hand, it is arranged so that it can move back and forth along a plurality of rails 13 laid on the floor.

The pull-out device 12 includes a horizontally long carriage 14 moving along a rail 13 and a motor 16 having a torque limiter 15.
It is driven to move forwards and backwards with respect to the formwork 1, and the horizontal carriage 17 is mounted on the horizontally long carriage 14 on both side rails 18, 18.
The horizontal carriage 17 is mounted so as to move laterally along, and the lateral movement carriage 17 is driven by the motor 19 to drive the wheels 20.
And moves on the horizontally long carriage 14 so as to correspond to.

The horizontal carriage 17 has a support frame 21 which is erected and fixed at a rear position of an upper surface thereof, and an elevator 23 which moves up and down along a guide 22 of the support frame 21 is arranged on the carriage 17, and an elevator 23 is provided. Is moved vertically by a feed screw mechanism 25 driven by a motor 24 installed on the support frame 21.

A cutter mechanism 26 is provided on the upper surface of the elevator 23.
Is installed, the chuck mechanism 27 is mounted on the lower surface side, and the support column 28 is provided upright on the front surface side of the horizontal carriage 17.
A stopper 29 that comes into contact with the tension plate 2 of the form 1 is provided at the upper end of the.

As shown in FIGS. 3 to 6, the cutter mechanism 26 fixes the bearing base 30 horizontally on the lift base 23,
A rotary shaft 34 oriented in the front-rear direction is mounted on the bearing base 30 by being supported by bearings 35, a disk-shaped cutter 36 is fixed to the tip of the rotary shaft 34, and the motor 3 mounted on the bearing base 30 is fixed.
The cutter 36 is rotated by 7.

The chuck mechanism 27 is located below the stopper 29 on the lower surface of the lifting table 23, and guide shafts 39 and 40 are parallel to each other between a pair of brackets 38, 38 fixed on both sides of the lower surface of the lifting table 23. Brackets 3
8 is extended by an air cylinder 41 fixed to 8, and a pair of chuck claws 42 are attached to the guide shafts 39 and 40.
It has a structure in which 42 is mounted so as to be movable along the axial direction.

Both chuck claws 42, 42 have a guide shaft 39.
And 40 horizontally projecting forward, and concave portions 43, 43 for externally sandwiching and sandwiching the tension plate 2 from both sides are provided on the surfaces of the tips facing each other.
The rear end of 2 is moved toward and away from the air cylinder 41 by the extension operation.

By contacting and pressing the end flanges of the mold 1 against the opposite outer surfaces of the chuck claws 42, 42, the entire pulling device 12 is retracted, so that the chuck claws 42,
Extraction cylinders 44, 44 for extracting the tension plate 2 sandwiched by 42 from the mold are fixed.

The tension plate withdrawing device of the present invention is constructed as described above, and its operation will be described below.

As shown in FIGS. 1 to 3, the horizontally elongated carriage 14 stands by at the retracted position, and the horizontally movable carriage 17 faces the mold 1 on the turning roller 11 to be pulled out. When the diameter size of the formwork 1 is input on the board and the start switch is turned on after that, the motor 19 is activated and the lateral movement carriage 17 is moved to the left and right designated positions and stopped. The motor 16 is activated and the horizontally long carriage is activated. When the first photoelectric sensor 14 mounted on the horizontal moving carriage 17 detects the mold 1 (not shown), the motor 16 is decelerated to slow down the forward movement of the horizontally long carriage 14. Then, when the second photoelectric sensor detects the mold 1, the stop signal is turned on, the timer is activated, the horizontal carriage 14 decelerates and advances, and the stopper 29
Comes into contact with the tension plate 2 of the mold 1, and the horizontal carriage 14 is stopped at the forward position by the timer up. Since the torque limiter 15 was attempted to be combined with the motor 16, the torque limiter 15 slips the rotation of the motor 16 until the timer expires after the stopper 29 contacts the tension plate 2, and the stopper 29 stops. At the position where it abuts the tension plate 2,
Make sure that the horizontal carriage 14 is stopped.

In the cutter mechanism 26, the cutter 36 is at the upper limit position, and the chuck mechanism 27 has the chuck claws 42 and 4.
2 spreads out on both sides, and the front ends face the positions on both lower sides of the tension plate 2.

After the motor 16 of the horizontal carriage 14 is stopped,
When the timer is up, the motor 24 is started and the cutter 3
6 is lowered at a high speed by pulse control and then switched to a low speed on the way to stop the cutting position while rotating the cutter 36, and at the same time, the mold 1 on the turning roller 11 is rotated.
When is rotated, as shown in FIG. 9, each strained muscle 3 is sequentially cut at the circumferential groove 5 of the tension plate 2.

When the set time has elapsed from the start of cutting and the cutting is completed, the rotation of the cutter 36 and the mold 1 is stopped due to the time-up, and the reverse rotation of the motor 24 causes the cutter 36 to move upward and stand by at the extraction position. To do.

A chuck mechanism 27 together with the cutter 36
Move upward together, the expanded chuck claws 42, 42 are located on both sides of the tension plate 2, and the air cylinder 41 extends after the chuck plates 42, 42 move upward, and the chuck claws 42, 42 move toward each other to close. The recesses 43, 43 are fitted on both sides of the flange portion 6 of the tension plate 2 shown in FIG. 9 to hold the plate 2 from both sides.

When the chuck claws 42, 42 clamp the tension plate 2, the hydraulic cylinders 44, 44 attached to the chuck claws 42, 42 are extended to operate the cylinder 4
4 and 44 are end flanges 7 of the mold 1 shown in FIG.
Since it abuts against and pushes against, the whole pulling device 12 is pushed back by the reaction force, and the tension plate 2 sandwiched by the chuck claws 42, 42 is pulled out from the mold 1.

When the cylinders 44, 44 extend and pull out the tension plate 2 from the form 1, the motor 16 rotates in reverse due to the timer, the pulling device 12 as a whole moves backward, and the horizontally long carriage 14 moves to the backward stop position. When stopped, the air cylinder 41 contracts, the chuck claws 42, 42 are opened, and the work is completed when the tension plate 2 is unpinched and dropped and discharged.

[0026]

As described above, according to the present invention, the tension muscle cutting of the concrete secondary product forming mold and the pulling out of the tension plate can be automatically performed, and the efficiency and safety of the pulling out work of the tension plate can be greatly improved. It is possible to improve the production cost of the secondary concrete product.

[Brief description of drawings]

FIG. 1 is a plan view of a drawing device according to the present invention.

FIG. 2 is a front view of the above.

FIG. 3 is a side view of the above.

FIG. 4 is an enlarged plan view showing a main part of the drawing device.

FIG. 5 is a front view of the same main portion.

FIG. 6 is a side view of the same main part.

FIG. 7 is an enlarged plan view of a chuck mechanism.

FIG. 8 is an enlarged side view of the above.

FIG. 9 is a vertical cross-sectional view showing a tension plate portion of a concrete pole formwork.

[Explanation of symbols]

 11 Turning Roller 12 Pulling Device 14 Horizontal Cart 15 Torque Limiter 16 Motor 17 Horizontal Cart 19, 24 Motor 26 Cutter Mechanism 27 Chuck Mechanism 29 Stopper 34 Rotating Shaft 36 Cutter 42 Chuck Claw 43 Recess 44 Cylinder

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tsuneo Saito 16 120 Murasakino, Kitakami City, Iwate Prefecture Tohoku Pole Corporation Kitakami Plant

Claims (1)

[Claims] 1. A stopper which abuts against the tension plate is provided on a carriage that moves forward and backward with respect to a tension plate of a concrete secondary product forming mold installed so as to rotate at a fixed position, and a cutter moves up and down on the carriage. The cutter rotates freely when the carriage stops when the stopper contacts the tension plate, and the cutter mechanism that cuts the tension muscles at the tension plate by the rotation of the formwork moves up and down in synchronization with the cutter mechanism. , A concrete secondary product forming mold tension plate pulling device provided with a chuck mechanism that holds the tension plate after cutting the tense muscles, pushes the flange of the form frame and retracts the carriage to pull the tension plate out of the form frame .