JPH06143245A - Assembling/disassembling apparatus for stretching device - Google Patents

Abstract

PURPOSE:To automatically execute an operation for removing and replacing a patching stretching rod when concrete columns having different lengths are manufactured. CONSTITUTION:The assembling/disassembling apparatus for a stretching device comprises grasping means 12 for grasping and conveying a patching stretching rod 4, first automatic connecting/disconnecting means 11 for connecting/ disconnecting a first connecting member 5 to or from the rod 4, and second automatic connecting/disconnecting means 13 for connecting a second connecting member 9 to or from the rod 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a concrete column such as a PC concrete pole used as a PC concrete pile or an electric pole, for assembling a tensioning device for introducing prestress to the concrete column. Alternatively, the present invention relates to a technology for automatically disassembling or disassembling.

[0002]

2. Description of the Related Art Conventionally, a tensioning device for introducing prestress to a concrete pillar is known in a concrete pillar manufacturing apparatus such as a PC concrete pole used as a PC concrete pile or an electric pole. In this tensioning device, a tip of a tension rod that penetrates a fixing plate provided at an end portion in the longitudinal direction of the lower mold is tensioned in the lower mold in a lower mold having a substantially semicircular cross section with an upper opening. Reinforcing bar through the tension plate and the end fitting by connecting the tension plate to the end fitting of the rebar cage that is placed in the formwork in a detachable manner and applying a tensile force to the tension rod. Tensile force is applied to the main bar of the basket, concrete is placed in this state, the upper mold is attached on the lower mold, and the concrete pillar is formed by centrifugal molding.

[0003]

In the prior art, in order to manufacture concrete columns having different lengths using a common formwork, the tension rods are replaced with those having different lengths. However, there is a problem in that the replacement work of the tension rods having different lengths is performed manually by the operator, and the replacement work takes time and effort.

The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to remove the tension rod for replenishment when manufacturing concrete columns having different lengths. It is an object of the present invention to provide an assembling / disassembling device for a tensioning device which can automatically perform an operation of exchanging.

[0005]

In order to solve the problems of the above-mentioned conventional examples and to achieve the object of the present invention, the assembling / disassembling device of the tensioning device of the present invention has a substantially semicircular cross section with an upper opening. In the lower mold frame 1, the end tension rod 3 penetrating the fixing plate 2 provided at the longitudinal end of the lower mold frame 1 and the additional tension rod 4 are connected by the first connecting member 5 and added together. The other end of the tension rod 4 and the tension plate 8 that is detachably connected to the end fitting 7 at the end of the rebar cage 6 arranged in the lower formwork 1 are connected by the second connecting member 9 to the end. Assembling and disassembling a tension device in which tension force is applied to the tension plate 8 through the first connecting member 5, the extension tension rod 4, and the second connecting member 9 by applying a tension force to the partial tension rod 3. Device for gripping and carrying the tension rod 4 for replenishment The step 12, the first connecting / disconnecting means 11 for connecting and disconnecting the first connecting member 5 and the tensioning rod 4 for replenishment, the second connecting member 9 and the tensioning rod 4 for replenishment. And a second automatic uncoupling means 13 for connecting and disconnecting.

Further, the gripping means 12 holds the tensioning rod 4 for replenishment rotatably, and the flanges 1a on both sides of the upper opening of the lower formwork 1 provided in a part of the gripping means 12. Tension rod 4 for replenishment that was held in contact with
It is preferable to provide a positioning means 14 for performing vertical positioning in the lower mold frame 1. It is also preferable that the gripping means 12 is vertically movable and is horizontally movable in a direction perpendicular to the axis of the lower mold 1.

Also, the first connecting member 5 is connected to the coupling 1
5, an engagement key operating means for sliding the engagement key 16 provided on the coupling 15 is provided with an engagement key 16 which is engageable with the end portion of the tension rod 4 for addition to the coupling 15. It is also preferable to provide 17 on the first automatic disconnecting means 11. It is also preferable that the engagement key operating means 17 is vertically movable.

Further, the second connecting member 9 is connected to the coupling 1
5, the coupling 15 is provided with an engagement key 16 which can be engaged with the end of the tension rod 4 for addition, and the second automatic connection releasing means 13 is provided with the engagement key 16 provided on the coupling 15. It is also preferable to provide an engagement key operating means 17a for sliding and a tension plate holding means 18 for vertically holding the tension plate 8 in the lower mold 1 in an upright state.

It is also preferable that the engagement key operating means 17a and the tension plate holding means 18 can be moved up and down. Also, a gripping means 12, a first automatic connection releasing means 11,
It is also preferable that each of the second automatic disconnecting means 13 and the second automatic disconnecting means 13 is movable in the axial direction of the lower mold 1 and in the direction perpendicular to the axis of the lower mold 1.

It is also preferable that there are two types of gripping means 12 for gripping and carrying the tension rod 4 for replenishment, one for carrying in and one for carrying out.

[0011]

According to the present invention having the above construction, however, the gripping means 12 for gripping and carrying the extension tension rod 4, the first connecting member 5, and the extension tension rod 4 are provided.
A first automatic decoupling means 11 for connecting and disconnecting and a second automatic decoupling means 13 for connecting and releasing the second connecting member 9 and the tension rod 4 for replenishment. When the replacement tension rod 4 is replaced with one having a different length, the gripping means 1 is provided.
The second automatic connection releasing means 13 releases the connection between the first connecting member 5 and the additional tension rod 4 by the first automatic connection releasing means 11 in a state in which the additional connecting tension rod 4 is gripped by the second automatic connection releasing means 13. Thus, the connection between the second connecting member 9 and the tension rod 4 for replenishment is released, and in this state, the gripping means 1
The extension tension rod 4 is taken out from the lower formwork 1 by 2 and moved. In order to set another extension tension rod 4, another extension tension rod 4 is grasped by the grasping means 12. The first connecting member 5 by the first automatic connection releasing means 11 with the gripping means 12 holding the replenishing tension rod 4.
And the tension rod 4 for replenishment are connected, and the second connecting member 9 and the tension rod 4 for replenishment are connected and set by the second automatic connection releasing means 13.

Further, the gripping means 12 is a gripping means 13 in which the tensioning rod 4 for replenishment is rotatably held, and flanges 1a on both sides of the upper opening of the lower formwork 1 provided in a part of the gripping means 3. The gripping means 1 is provided with the positioning means 14 for vertically positioning in the lower mold 1 of the replenishment tension rod 4 that is brought into contact with and gripped with the gripping means 1.
When grasping the tension rod 4 for replenishment which is set at a predetermined position in the lower mold 1 by the positioning means 14 provided in 2, the gripping means 12 is vertically positioned with the flange 1a of the lower mold 1 as a reference. The gripping means 12 grips another tensioning rod 4 for replenishment by the gripping means 12 and inserts it into the lower formwork 1 and sets it in the vertical direction. It can be inserted into the correct position by doing.

The gripping means 12 can be moved up and down,
By forming the lower mold 1 so as to be horizontally movable in a direction perpendicular to the axis of the lower mold 1, it is possible to reliably transfer the replenishment tension rod 4 into and out of the lower mold 1. Further, the first connecting member 5 is constituted by the coupling 15, and the coupling 1
5 is provided with an engagement key 16 that can be engaged with the end portion of the tensioning rod 4 for replenishment, and an engagement key operating means 17 for sliding the engagement key 16 provided on the coupling 15 is first automatically connected. With the configuration provided in the release means 11, the engagement key 16 can be slid by the operation of the engagement key operating means 17 to release the engagement between the coupling 15 and the end of the tension rod 4 for supplementation with a simple configuration. Is.

Further, the second connecting member 9 is connected to the coupling 1
5, the coupling 15 is provided with an engagement key 16 which can be engaged with the end of the tension rod 4 for addition, and the second automatic connection releasing means 13 is provided with the engagement key 16 provided on the coupling 15. When the engaging key operating means 17a for sliding and the tension plate holding means 18 for vertically holding the tension plate 8 in the lower mold 1 in an upright state are provided, the tension plate holding means 18 causes the tension plate. 8 is held, the engagement key 16 is operated by operating the engagement key operating means 17a.
Can be slid to release the engagement between the coupling 15 and the end of the tension rod 4 for replenishment with a simple structure.

The gripping means 12, the first automatic connection releasing means 11 and the second automatic connection releasing means 13 are respectively movable in the axial direction of the lower mold 1 and the axis of the lower mold 1 is movable. By making it movable in the right-angled direction, it is possible to cope with the tension rods 4 for extension having different lengths. Also, a gripping means 12 for gripping and carrying the tension rod 4 for replenishment.
However, since there are two types of loading and unloading, loading and unloading of the tension rod 4 for replenishment can be performed efficiently.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. A device for removing and transporting the extension tension rod 4 set in the lower mold 1 and for transporting another extension tension rod 4 and setting it in the lower mold 1 is provided on the traveling base 10. There is. This traveling base 10 is shown in FIG.
To the main rail 2 supported by the column 19 as shown in FIG.
It is free to run 0. In the figure, reference numeral 21 denotes traveling wheels provided on the traveling base 10, and the traveling wheels 21 are driven by a geared motor 22 so that the traveling base 10 travels along the main rail 20.

On the lower surface of the traveling base 10, there are provided three sets of rails 23 extending in a direction orthogonal to the main rail 20 (the traveling direction of the traveling base 10). 2 rails 23 for each set
One set is made up of three pieces, and three sets of rails 23 made up of these two pieces are arranged side by side in three rows as shown in FIGS. A device having a gripping means 12 for gripping and carrying the tensioning rod 4 for replenishment is movably attached to each of the rails 23 on both sides of the three rails 23.
One of the devices movably attached to the two sets of rails 23 on both sides is for assembling the tension rod 4 for replenishment, and the other device is for disassembling. In addition, on the pair of rails 23 in the center, a first automatic connection releasing means 11 for connecting and disconnecting a first connecting member 5 and a tensioning rod 4 for replenishment, which will be described later, and a first automatic connection releasing means 11, which will be described later. There is movably mounted a device with a second automatic decoupling means 13 for connecting and disconnecting the second connecting member 9 and the tensioning rod 4 for replenishment.

In the device provided with the gripping means 12, traveling wheels 25 provided on a frame 24 can travel on rails 23, and a pinion 28 engages with a rack 26 provided along the rails 23. The drive of the drive motor 27 provided on the frame 24 is controlled by the pulley 27a and the transmission belt 29.
It is transmitted to the pinion 28 via the pinion 28 to rotate the pinion 28, whereby the pinion 28 is moved with respect to the rack 26, whereby the frame body 24 is moved along the rail 23. A movable frame 30 is attached to the frame body 24 so as to be vertically movable. That is, the moving frame 30 is attached to the frame body 24 via the moving guide mechanism 36 including the linear guide 31 and the guide bearing 32 so as to be vertically movable. The frame body 24 is provided with a rack jack 33 driven by a geared motor 33a.
3, the lower end portion of the rack 34 that moves in the vertical direction is the moving frame 3
It is connected to 0. Therefore, by driving the rack jack 33, the moving frame 30 moves vertically with respect to the frame body 24.

As shown in FIGS. 4 and 5, a slide board 35 is horizontally slidably attached to the movable frame 30. That is, the slide board 35 is elongated in the direction orthogonal to the rail 23 (the direction parallel to the main rail 20), and the slide board 35 has a moving guide mechanism 36 including a linear guide 31 and a guide bearing 32. And is attached to the movable frame 30 in a lateral direction (horizontal and in a direction orthogonal to the rail 23). The moving frame 30 is provided with a rack jack 38 driven by a geared motor 38a. The rack jack 38 is used to move a rack 39 arranged along the longitudinal direction of the slide board 35 and having its tip end connected to the slide board 35. It is designed to let you. Therefore, by driving the rack jack 38, the slide board 35 moves in a direction horizontal to the moving frame 30 and orthogonal to the rail 23.

As shown in FIGS. 5 and 6, a gripping means 12 is provided at the tip of the slide board 35 so as to be vertically movable.
The frame body constituting the base body of the gripping means 12 is composed of an up-and-down moving frame 40 and a main frame 41, and the up-and-down moving frame 40 slides on a moving guide mechanism 36 including a linear guide 31 and a guide bearing 32. It is attached so as to be vertically movable with respect to 35. In this case, the up-and-down moving frame 40 is suspended from the slide board 35 by the suspension rod 43, and the state in which it hits the stopper 44 provided on the suspension rod 43 is the lowest position, and along the suspension rod 43. It can move up and down as much as it can move. The main frame 41 is mounted movably in the lateral direction (horizontal and in a direction orthogonal to the rail 23) with respect to the vertical moving frame 40 via a moving guide mechanism 36 composed of a linear guide 31 and a guide bearing 32. Springs 45 are provided between both sides of the main frame 41 and the vertical moving frame 40, and the main frame 41 is stopped at a position where the spring forces of both springs 45 are balanced. The main frame 41 is provided with a recess 42 that opens downward and in a direction parallel to the rail 23, and a support having a support roller 46 at the tip outside the one opening of the recess 42 in the direction parallel to the rail 23. An arm 47 is rotatably supported, and the support arm 47 is rotatably driven by a cylinder device 48. When the support arm 47 is driven to rotate, the support roller 46 provided at the tip of the support arm 47 is movable as shown by the arrow in FIG. A holding arm 50 having a holding roller 49 at the lower end is arranged movably up and down outside the other opening of the recess 42 in a direction parallel to the rail 23. The holding arm 50 is moved up and down by a cylinder device 51. It is free. Then, the supporting roller 46 provided on the supporting arm 47 that is rotationally driven by the cylinder device 48.
The pressing roller 49 provided on the pressing arm 50 that is vertically moved by the cylinder device 51 constitutes the gripping means 12. Then, the support arm 47 is rotated in a state where the recess 42 is fitted in a part of the tension rod 4 for replenishment, and the lower sides of the tension rod 4 for replenishment are rotatably supported by the support rollers 46, and the pressing arm is also provided. The upper part of the tensioning rod 4 for replenishment is rotatably supported by the presser roller 49 by lowering 50, and the two support rollers 46 and the one presser roller 49 which constitute the gripping means 12 in this way.
Thus, the tension rod 4 for replenishment is rotatably supported at three points. Further, as shown in FIG. 7, the main frame 41 is provided with anti-rotation members 53 which are movable by cylinders 53a on both sides of the concave portion 42. As described above, the two support rollers 46 and one pressing member By pressing the rotation preventing member 53 against the side surface of the tensioning rod 4 for replenishment rotatably supported by the roller 49, the rotation of the tensioning rod 4 for replenishment is stopped. In addition, a shaft 52a is provided on both sides of the main frame 41 in a direction orthogonal to the rail 23.
And a plurality of positioning rollers 52 are rotatably supported on the shaft 52a. The positioning roller 52 constitutes the positioning means 14.

Frames 54, 5 are provided on the pair of rails 23 in the center.
5 are independently mounted to be movable. That is, as shown in FIGS. 8 and 10, the traveling wheels 25 provided on the frame bodies 54 and 55 are mounted on the rails 23 in the same manner as when the frame body 24 is mounted on the rails 23 on the frame bodies 54 and 55, respectively. It can run freely, and further, a pinion 28 is engaged with a rack 26 provided along the rail 23, so that the drive motor 27 provided on the frame 24 can be driven by the pulley 2
7a, transmitted to the pinion 28 via the conduction belt 29 and rotated to move the pinion 28 with respect to the rack 26, whereby the frames 54 and 55 are moved along the rail 23. .

An elevating frame 56 is attached to the frame 54 so as to be vertically movable. That is, the elevating frame 56 is the linear guide 31.
And a guide bearing 32
It is attached to the frame body 54 via the so as to be movable in the vertical direction. The frame body 54 is provided with a rack jack 57 driven by a geared motor 57a, and a lower end portion of a rack 58 which moves in the vertical direction of the rack jack 57 is connected to the elevating frame 56. Therefore, the rack jack 5
By driving 7, the elevating frame 56 moves vertically with respect to the frame body 54.

A vertical moving frame 87 is provided on the elevating frame 56 so as to be vertically movable via a moving guide mechanism 36 composed of a linear guide 31 and a guide bearing 32. A contact portion 88 is provided at the upper end of the vertical movement frame 87, and when the contact portion 88 hits the contacted portion 89 of the elevating frame 56, the movement of the vertical movement frame 87 downward with respect to the elevating frame 56 is stopped. .

A slide plate 59 is slidably mounted on the vertical moving frame 87 in a lateral direction (horizontal and parallel to the rail 23) via a moving guide mechanism 36 composed of a linear guide 31 and a guide bearing 32. The slide plate 59 is provided with an engaging claw serving as the engaging key operating means 17. Then, the cylinder device 61 is operated to rotate the link arm 62, and the pin 63 provided on the slide plate 59 is slid along the long hole 64 by the rotation of the link arm 62 to move the engaging claw 60 in the lateral direction. To move to. Then, as described above, the engagement key operating means 17 composed of the engaging claws provided on the slide plate 59 which is moved by the drive of the cylinder device 61 is the first automatic connection releasing means 1.
It is 1.

As shown in FIGS. 10 to 12, the frame 55 is provided with a lateral moving body 76 in a lateral direction (rail direction) via a moving guide mechanism 36 including a linear guide 31 and a guide bearing 32. It is mounted so as to be movable in a direction parallel to 23), and in the drawing, 74 is a cylinder device for moving the lateral moving body 76. As shown in FIG.
As shown in FIG. 5, an elevating body 65 is provided so as to be vertically movable. That is, the elevating body 65 is attached to the lateral moving body 76 via the movement guide mechanism 36 including the linear guide 31 and the guide bearing 32 so as to be vertically movable. The lateral moving body 76 is provided with a rack jack 68 driven by a geared motor 68a, and a lower end portion of a rack 69 that moves in the vertical direction of the rack jack 68 is connected to the elevating body 65. Therefore, the rack jack 6
By driving 8, the lifting / lowering body 65 moves vertically with respect to the lateral moving body 76. An elevating body 65 is provided with an up-and-down moving body 70 movably up and down via a moving guide mechanism 36 including a linear guide 31 and a guide bearing 32. A contact portion 71 is provided at the upper end of the vertical moving body 70.
Is provided, and the hitting portion 71 hits the hit portion 95 of the lifting / lowering body 65, whereby the downward movement of the vertical moving body 70 with respect to the lifting / lowering body 65 is stopped.

The up-and-down moving body 65 has the second connection releasing means 1
3 is provided, and the second connection releasing means 13 has an engaging claw serving as an engaging key operating means 17a and a tension plate holding means 1.
A support plate 66 and a centering rod 67, which are eight, are provided. The engagement claw serving as the engagement key operating means 17a is adapted to rotate in the direction of the arrow in FIG. 11 when the cylinder device 72 is driven. The core pressing rod 67 is movable in the direction of the arrow in FIG. 11 by driving the cylinder device 73.

Below one end of the main rail 20, there is provided a stock portion (not shown) for stocking a plurality of tensioning rods 4 for extension having different lengths, and this stock portion has different lengths. A plurality of extension tension rods 4 are arranged at right angles to the main rail 20. A roller conveyor 75 is arranged below the other end of the main rail 20 in a direction orthogonal to the main rail 20, as shown in FIG. The frame 1 is transferred in a direction orthogonal to the main rail 20 (that is, a direction parallel to the rail 23) and stopped at a predetermined position. The concrete columnar body is removed from the lower formwork 1, and the tension plate 8 is arranged at a predetermined position in the longitudinal direction of the lower formwork 1 (a position corresponding to the length of the already manufactured concrete columnar body). An end tension rod 3 penetrating a fixing plate 2 provided at the longitudinal end of the lower mold 1 and a tension rod 4 for replenishment are connected by a first connecting member 5 and a tension rod 4 for replenishment The end portion and the tension plate 8 arranged in the lower mold 1 are in a state of being connected to each other via the second connecting member 9. In this state, the lower mold 1 is at a predetermined position on the roller conveyor 75. Is transferred to and stopped. In this state, when forming a concrete pillar having a length different from the previously manufactured one, the position of the tension plate 8 is changed, and at the same time, the tension rod 4 for addition is exchanged with a different length and reset. This work is automatically performed by the above-mentioned device of the present invention.

Before explaining the operation of the device of the present invention, the first connecting member 5 for connecting the end tension rod 3 and the extension tension rod 4 and the other end of the extension tension rod 4 and the tension plate 8. The second connecting member 9 for connecting and will be described. Since the first connecting member 5 and the second connecting member 9 have the same structure, the first connecting member 5 will be described.
As shown in FIG. 14, the first connecting member 5 is composed of a coupling 15, and a long slot 77 for sliding is provided at a position opposed to the outer peripheral surface of the central portion of the coupling 15 in the circumferential direction. The engagement key 16 is slidably inserted into the sliding long hole 77, and the engagement key 16 is slidably fitted on the outer peripheral portion of the coupling 15.
Is stuck. A spring 80 is interposed between the operation ring 78 and the protrusion 79 fixed to the outer peripheral portion of the coupling 15. Female thread portions 81 are formed on both half portions of the inner peripheral portion of the coupling 15. Further, a pin hole 82 is bored at the end of the coupling 15 where the protrusion 79 is provided. In the accompanying drawings shown in FIGS. 13 and 14, the male screw portion 83 provided at one end portion of the tensioning rod 4 for addition is screwed into the female screw portion 81 of one half of the coupling 15 and the pin hole 82 is used. 84 is inserted and connected to the extension tension rod 4 so as not to rotate, and the end tension rod 3 penetrating the fixing plate 2 at the end of the lower formwork 1 is projected into the lower formwork 1 of the end form. The male screw portion 83 at the end is the female screw portion 8 of the other half of the coupling 15.
1 is engaged with the end portion of the end tension rod 3 and the engaging key 1
6 is pressed and the end tension rod 3 is further screwed, the engagement key 16 is pressed against the spring 80, and the engagement key 16 engages with the engagement groove 85 at the tip of the end tension rod 3. It is connected in a state where rotation is blocked. In this case, first, the operating ring 78 is pushed against the spring 80, and in this state, the male screw portion 83 is screwed into the female screw portion 81, and then the pressing of the operating ring 78 is released to release the engagement key 16 from the male screw portion. The male screw portion 83 is slowly rotated in the reverse direction and retracted in this state, and the engaging key 16 is engaged with the engaging groove 8.
5 may be engaged. The second connecting member 9 has the same structure as the first connecting member 5 having the above configuration,
In the embodiment of FIG. 15, the male screw portion 83 of the screw rod 86 protruding from the tension plate 8 is screwed into the female screw portion 81 of one half of the coupling 15, and the pin 8 is inserted through the pin hole 82.
4 is inserted to connect the tension plate 8 and the coupling 15 to each other in a non-rotating state, and the male screw portion 83 at the end of the tension rod 4 for addition is a female screw portion 81 of the other half of the coupling 15. When the engaging key 16 is pushed by the tip portion of the extension tension rod 4 and the extension tension rod 4 is further screwed, the engagement key 16 is pressed against the spring 80 and the engagement key 16 Are engaged with the engaging groove 85 at the tip of the end tension rod 3 and are connected in a state where rotation is blocked.

As described above, the end tension rod 3 and the extension tension rod 4 are connected by the first connecting member 5, and the other end of the extension tension rod 4 and the tension arranged in the lower mold 1 are connected. The lower formwork 1 in the state of being connected to the plate 8 via the second connecting member 9 and being set is transferred to a predetermined position on the roller conveyor 75 and stopped, and in this state, In order to form different concrete pillars, the position of the tension plate 8 is changed, and at the same time, the tension rod 4 for replenishment is exchanged with another one having a different length and resetting is performed as follows.

That is, first, the traveling base 10 is moved to a position above one end of the main rail 20 where a plurality of tensioning rods 4 for stocking are stocked, and below one end of the main rail 20. Of the plurality of additional tensioning rods 4 having different lengths, which are arranged in the upper part, are grasped by the grasping means 12 of one of the two devices having the grasping means 12 and are moved upward. And the traveling base 10 is moved to the other end of the main rail 20 in this state, and the first automatic connection releasing means 11 is placed directly above the lower mold 1.
Alternatively, the second automatic connection releasing means 13 is positioned.

In this state, the slide plate 35 of the other one of the two devices having the gripping means 12 which does not grip the tensioning rod 4 for replenishment is moved to move the gripping means 12 into the lower mold 1. Position it just above the tensioning rod 4 for replenishment and stop. Next, the moving frame 30 is lowered to bring the positioning roller 52, which is the positioning means 14, into contact with the flange 1a of the upper opening of the lower mold 1 as shown in FIG. 5, and stop in this state. In this case, the vertical movement frame 40 is the slide board 3
By being able to move a little up and down with respect to 5, the error when the moving frame 30 is stopped with the positioning roller 52 hitting the flange 1a is absorbed. By doing so, the gripping means 12 is positioned in the vertical direction, and the concavity 42 of the main frame 42 straddles the tension rod 4 for replenishment arranged in the lower mold 1. Next, the support roller 46 is rotated to support both lower surfaces of the extension tension rod 4 and the pressing roller 49 is lowered to support the upper surface of the extension tension rod 4. In this state, the tension rod 4 for replenishment is supported by the two support rollers 46 and the pressing roller 49 at three points rotatably in the circumferential direction.

Next, the frame 55 provided with the second automatic connection releasing means 13 is moved to above the end of the tensioning rod 4 for replenishing the lower mold 1 on the tensioning plate 8 side, and further the lateral moving body 76. Is moved to perform fine adjustment, the elevating body 65 is lowered, and the engagement key operating means 17a is straddled over the coupling 15 constituting the second connecting member 9. In this case, the roller 70 a provided on the vertical moving body 70 abuts on the upper surface of the coupling 15 and stops. Here, at the same time, the support plate 66 and the core pressing rod 67 descend so that they are located on both sides of the tension plate 8. Next, the core pressing rod 67 is driven to drive the support plate 6
The tension plate 8 is sandwiched between the 6 and the core pressing rod 67, and the tension plate 8 is held.
Hold the vertical posture. At this time, the tip end of the core pressing rod 67 is fitted into the hole 8a provided in the tension plate 8 so that the tension plate 8 cannot rotate and also prevents the tension plate 8 from falling when it is lifted.
Further, the engagement key operating means 17a is driven to move the operation ring 78 provided on the coupling 15 against the spring 80. In this state, the end tension rod 3 is reversely rotated by the rotation means 97 as shown in FIG. 1 (rotates in the direction in which the male screw portion 83 and the female screw portion 81 are unscrewed). Then, since the tension plate 8 is held by the tension plate holding means 18 in a non-rotatable state, the coupling 15 connected to the tension plate 8 in a non-rotating state does not rotate, and the end portion tension rod 3 does not rotate.
The additional tension rod 4 is rotated via the, and the external thread portion 83 is disengaged from the internal thread portion 81 while the extension tension rod 4 moves in the direction away from the tension plate 8 together with the end tension rod 3.

Next, the anti-rotation member 53 provided on the grip means 12 is pressed against the additional tension rod 4 to hold the additional tension rod 4 so that it cannot rotate. Also, the first
The frame body 54 provided with the automatic connection releasing means 11 is added to the other end portion of the tension rod 4 for connection and moved to the coupling 15 side which is the first connection member 5 (the movement of the frame body 54 is the same as that of the frame body described above). (It may be performed when moving 55), the elevating frame 56 is lowered, and the engagement key operating means 17 is straddled over the coupling 15 constituting the first connecting member 5. In this case, the roller 87a provided on the vertical moving frame 87 is coupled to the coupling 15
It hits the top surface of the and stops. In this state, the end tension rod 3 is further rotated in the reverse direction by an arbitrary rotating means (male screw portion 8).
3 and the female screw 81 are rotated in the direction in which the screwing is released). Then, the tension rod 4 for replenishment is grasped by the gripping means 12
Since it is held in a non-rotatable state by the anti-rotation member 53 provided at the end, the coupling 15 connected to the other end of the extension tension rod 4 in the non-rotation state does not rotate, but the end tension rod 3 rotates. As the end tension rod 3 moves in the direction away from the coupling 15, the male screw portion 83 comes off the female screw portion 81.

In this way, the connection between the end tension rod 3 and the tension plate 8 at both ends of the extension tension rod 4 is released (that is, by the first connecting member 5 and the second connecting member 9). In a state where the connection is released), the movable frame 30 is raised while the above-mentioned tensioning rod 4 for addition, the connection of which is released by the gripping means 12, is held, and the slide board 35 is slid in parallel with the main rail 20. The removed tension rod 4 for replenishment is moved to a position apart from above the lower mold 1 and stopped at this position.

Next, the support plate 66 and the core pressing rod 6
While holding the tension plate 8 with 7 and raising the vertical moving body 70 a little while keeping the vertical posture and moving the tension plate 8 slightly, the frame 55 is moved to move the tension plate 8 into the lower mold 1. To the desired position in the form frame axial direction, and the vertical moving body 70 is lowered at the desired position to hold the tension plate 8 in the desired position of the lower formwork 1 while maintaining the vertical posture. To do. in this case,
The pressing operation of the operation ring 78 of the coupling 15 connected to the tension plate 8 by the engagement key operation means 17a is released.

Next, the slide board 35 of the apparatus having another gripping means 12 which holds the additional tensioning rod 4 of a desired length in advance and waits is moved to grip the additional tensioning rod 4. Then, the gripping means 12 is positioned right above the lower mold 1 and stopped. Next, the moving frame 30 is lowered to position the positioning roller 52 which is the positioning means 14.
As shown in FIG. 5, the flange 1a of the upper opening of the lower mold 1 is applied to the lower mold 1 and stopped in this state, and the tension rod 4 for replenishment is arranged at a predetermined position in the lower mold 1 in parallel with the lower mold 1. To do. In this case, rotation of the additional tension rod 4 by the anti-rotation member 53 is prevented.

Next, the end tension rod 3 is rotated in the forward direction to add the external thread portion 83 at the end of the end tension rod 3 and screw it into the female thread portion 81 at one half of the tension rod 4 for tightening. When the end tension rod 3 is screwed forward while rotating forward, the tip part of the end tension rod 3 pushes the engagement key 16 and further advances the end tension rod 3. The engagement key 16 is pressed against the spring 80, and the engagement key 16 is engaged with the engagement groove 85 at the tip of the end tension rod 3 to be coupled while being prevented from rotating.

Next, the rotation stop by the rotation stop member 53 is released to bring the extension tension rod 4 into a state in which it is rotatably supported by the grasping means 12. In this state, when the end tension rod 3 is further rotated forward, The extension tension rod 4 is normally rotated together with the end tension rod 3 to the female screw portion 81 on one side half of the coupling 15 which is connected to the tension plate 8 in a non-rotational state, and the external thread portion at the end of the tension rod 4 is added. 83 is screwed together, and further, by rotating the end tension rod 3 in the forward direction, the extension tension rod 4 is screwed while advancing, and the tip of the extension tension rod 4 presses the engagement key 16 and further ends. When the tension rod 3 is screwed, the tension rod 4 for extension is added.
The engaging key 16 is pressed against the spring 80 at the tip of the engaging key 16 and the engaging key 16 is engaged with the engaging groove 85 at the tip of the tension rod 4 for replenishment and is coupled in a state in which the rotation is blocked. It will be.

In this way, the first connecting member 5 connects the end tension rod 3 and the extension tension rod 4 to each other,
The connecting tension rod 4 and the tension plate 8 are automatically connected by the second connecting member 9, and when the connection is completed, the connecting tension rod 3 by the grasping means 12 is added.
The gripping and holding of the tension plate 8 is released, and the holding of the tension plate 8 by the tension plate holding means 18 is released, these members are raised, and the tension rod 3 for replenishment that was removed at the beginning is gripped and run in a state of being suspended. The base 10 is moved along the main rail 20 to a place where the tensioning rod 4 for replenishment is stocked, and the tensioning rod 4 for replenishment that has been removed and transferred to the place where the tensioning rod 4 for replenishment has been stocked is transferred. Put it.

As described above, the tension plate 8 is arranged at a desired position in the lower mold 1 and the tension rod 3 for replenishment having a length corresponding to the tension plate 8 is set, and then the lower mold 1 is subjected to the next step. Then, the rebar cage 6 is set in the lower formwork 1 there. Here, an end fitting 7 is provided at the end of the reinforcing bar basket 6, and a connecting bolt 90 is provided on the end fitting 7 so as to project therefrom. Further, the tension plate 8 is provided with a daruma hole 93 through which the large hole 91 and the small hole 92 communicate with each other. Then, the large hole 91 of the daruma hole 93 and the connecting bolt 90 are opposed to each other, and in this state, the end tension rod 3 is pushed to insert the connecting bolt 90 into the large hole 91, and the head portion 90a of the connecting bolt 90 is enlarged. It is projected from the hole 91. Next, the end tension rod 3 is normally rotated to connect the connecting bolt 90.
Are placed in the small holes 92. End tension rod 3 in this state
When a tensile force is applied to the head 90a, the head 90a hits the outer edge of the small hole 92, the end fitting 7 is pulled, and the main bar of the reinforcing bar cage 6 is tensioned. In this state, the lower formwork 1 is filled with ready-mixed concrete, the upper formwork 94 is connected to the lower formwork 1 with bolts and the like, and the form is clamped. Then, this formwork is rotated to perform centrifugal molding. By doing so, a concrete column body in which prestress is introduced is formed. In order to release the connection between the end fitting 7 and the tension plate 8, after loosening the tension by the rod, the end tension rod 3 is reversely rotated to position the connecting bolt 90 in the small hole 92 of the sloppy hole 93. Then, by pulling the end tension rod 3 in this state, the connecting bolt 90 can be pulled out from the duller hole 93.

By the way, in the above embodiment, the coupling 15 which is the first connecting member 5 for connecting the extension tension rod 4 and the end tension rod 3 is provided with the pin 84 on the extension tension rod 4 side. Although an example in which the coupling 15 is non-rotatably connected is shown, the coupling 15 may be non-rotatably connected to the end tension rod 3 side by a pin 84. Further, in the above embodiment, an example is shown in which the coupling 15 that is the second connecting member 9 that connects the tension rod 4 for replenishment and the tension plate 8 is non-rotatably connected to the tension plate 8 side by the pin 84. However, the coupling 15 may be added to the tension rod 4 side for non-rotatable connection by the pin 84.

The embodiment shown in FIG. 13 shows an example in which the tension rod 4 for replenishment is one.
As the connecting rod 4 for replenishment, a plurality of tensioning rods 4 for replenishment may be connected in a straight line using a coupling 15. In this case, it is also possible to connect or disconnect a plurality of tension rods 4 for replenishment by using the coupling 15 by using the above-described device of the present invention.

Although FIG. 13 shows an example in which the tension rod 4 for connection is connected to only one side of one side, it may be connected to the other side of the other side.

[0044]

According to the present invention, as described above, the gripping means for gripping and carrying the tension rod for replenishment, and the first
And a second automatic connecting / disconnecting means for connecting and disconnecting the connecting member and the extension tension rod, and a second automatic connection releasing means for connecting and releasing the second connection member and the extension tension rod. Since the automatic connection releasing means is provided, when replacing the tension rod for extension with a different length, the tension rod for extension which has been set in advance is held by the grasping means and the first connection member. Removing the connection with the tensioning rod for replenishment and the connection between the second connecting member and the tensioning rod for replenishment with the first automatic connection releasing means and the second automatic connection releasing means, respectively, and taking them out from the lower formwork. In addition, in order to set another extension tension rod, grab another extension tension rod and put it in the lower mold, and with the holding means holding the extension tension rod, Setting by connecting the first connecting member and the tension rod for replenishment and the connection between the second connecting member and the tension rod for replenishment by the first automatic connection releasing means and the second automatic connection releasing means. In this way, the tension rod for replenishment can be automatically disassembled and set, the work is simplified, and the speed is increased.

Further, the gripping means abuts on the gripping means for rotatably holding the tension rod for replenishment and the flanges on both sides of the upper opening of the lower formwork provided in a part of the gripping means. In the structure having the positioning means for vertically positioning the tension rod for replenishment in the lower mold, the positioning means provided in the gripping means sets it to a predetermined position in the lower mold. When grasping a tension rod for replenishment, it is possible to accurately grasp the grasping device by vertically positioning with reference to the flange of the lower formwork, and to grasp another tension rod for replenishment by the grasping device. When grasping and inserting into the lower formwork and setting it, it is possible to position it in the vertical direction and insert it in the correct position, and as a result, it is possible to accurately disassemble and set the tension rod for replenishment. It is intended.

By forming the gripping means so that it can move up and down, and can move horizontally in a direction perpendicular to the axis of the lower mold,
The tension rod for replenishment can be reliably taken in and out of the lower formwork. In addition, the first connecting member is formed of a coupling, and an engagement key that is added to the coupling and is engageable with the end of the tension rod for tensioning is provided, and the engagement key provided on the coupling is slid. In the structure in which the compound key operation means is provided in the first automatic connection releasing means, the engagement key is slid by the operation of the engagement key operation means to engage the coupling with the end of the tension rod for replenishment. Can be reliably released with a simple configuration, and the configuration of the device is simplified.

Further, the second connecting member is composed of a coupling, and an engaging key is provided which is added to the coupling and is engageable with the end of the tension rod for tensioning. In the structure in which the engaging key operating means for sliding the provided engaging key and the tension plate holding means for vertically holding the tension plate in the upright state in the lower mold are provided, With the tension plate held by the means, the engagement key can be slid by the operation of the engagement key operating means to reliably release the engagement between the coupling and the end of the tension rod for replenishment with a simple structure. Thus, the structure of the device is simplified.

Further, the gripping means, the first automatic connection releasing means, and the second automatic connection releasing means can be moved in the axial direction of the lower mold, and can move in the direction perpendicular to the axis of the lower mold. By making it possible, it is possible to deal with tension rods for extension of different lengths. Further, since there are two types of gripping means for gripping and carrying the replenishment tension rod, one for loading and the other for unloading, the replenishment tension rod 4 can be carried in and out efficiently.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing the whole of the present invention.

FIG. 2 is a front view of the above.

FIG. 3 is a plan view of the above.

FIG. 4 is a partial front view showing the device including the gripping means of the above.

FIG. 5 is a front view of another portion showing the device including the gripping means of the above.

FIG. 6 is a side view of the above.

FIG. 7 is a front view showing the rotation preventing member portion of the above.

FIG. 8 is a front view showing an apparatus including the first automatic connection releasing means of the above.

FIG. 9 is a side view of the above.

FIG. 10 is a rear view showing the device including the second automatic disconnection means of the above.

FIG. 11 is a side view of the above.

FIG. 12 is a front view of the above.

FIG. 13 is a plan view showing a state where each member is set in the lower mold frame of the same.

FIG. 14 is a cross-sectional view showing a connection made by the above coupling.

FIG. 15 is an exploded cross-sectional view showing the connection with the tension plate by the coupling of the above.

FIG. 16 is a partially cutaway exploded cross-sectional view showing the connection between the tension plate and the end fittings of the same.

FIG. 17 is a front view of the same tension plate.

FIG. 18 is a plan view showing a state where the above reinforcing bar cage is set.

FIG. 19 is a sectional view of the above mold.

[Explanation of symbols]

 1 Lower Formwork 1a Flange 2 Fixing Plate 3 End Tension Rod 4 Reinforcement Tension Rod 5 First Connection Member 6 Reinforcing Bar Basket 7 End Metal Fitting 8 Tension Plate 9 Second Connection Member 11 First Automatic Connection Release Means 12 Grasping Means 13 Second automatic decoupling means 14 Positioning means 15 Coupling 16 Engagement key 17 Engagement key operating means 17a Engagement key operating means 18 Tension plate holding means

Claims (9)

[Claims] 1. An end tension rod penetrating a fixing plate provided at an end portion in the longitudinal direction of the lower mold and a tension rod for replenishment in a lower mold having a substantially semicircular cross section with an upper opening. The second connecting member connects the other end of the tension rod for replenishment and the tension plate that is detachably connected to the end fitting of the end of the rebar cage arranged in the lower formwork. And applying tension to the end tension rod
Is a device for assembling and disassembling a connecting member, a tensioning rod for replenishment, and a tensioning device for applying a tensioning force to a tensioning plate via a second connecting member, for grasping and carrying the tensioning rod for replenishment. And a first automatic connection releasing means for connecting and disconnecting the first connecting member and the extension tension rod, and connecting the second connection member and the extension tension rod. An assembling and disassembling apparatus for a tensioning device, comprising: a second automatic connection releasing means for releasing. 2. The gripping means abuts on the gripping means for rotatably holding the tension rod for replenishment and the flanges on both sides of the upper opening of the lower formwork provided in a part of the gripping means. 2. A positioning means for vertically positioning in the lower mold frame of the tensioning rod for replenishing the joint.
Assembly and disassembly device for the tensioning device described. 3. The apparatus for disassembling and disassembling a tensioning device according to claim 1, wherein the gripping means is vertically movable and is horizontally movable in a direction perpendicular to the axis of the lower mold. 4. The first connecting member is formed of a coupling, an engagement key is provided to the coupling so as to be engageable with an end of a tension rod for tensioning, and the engagement key provided on the coupling is slid. First engaging key operation means for
The assembling and disassembling apparatus for a tensioning device according to claim 1, which is provided in the automatic connection releasing means. 5. The apparatus for disassembling and disassembling a tensioning device according to claim 4, wherein the engaging key operating means is vertically movable. 6. The second connecting member is composed of a coupling, and an engaging key is provided on the coupling so as to engage with the end of the tension rod for tensioning, and the second automatic connection releasing means is provided with the coupling. The assembly of the tensioning device according to claim 1, further comprising: engagement key operating means for sliding the provided engagement key, and tensioning plate holding means for vertically holding the tensioning plate in an upright state in the lower mold. Dismantling device. 7. The apparatus for disassembling and disassembling a tensioning device according to claim 6, wherein the engaging key operating means and the tensioning plate holding means are vertically movable. 8. The gripping means, the first automatic connection releasing means, and the second automatic connection releasing means are movable in the axial direction of the lower mold and move in the direction perpendicular to the axis of the lower mold. The assembling and disassembling apparatus of the tensioning device according to claim 1, which is enabled. 9. The apparatus for disassembling and disassembling a tensioning device according to claim 1, wherein there are two types of gripping means for gripping and carrying the tension rod for replenishment, one for carrying in and one for carrying out.