JP3252008B2 - Column disconnection method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PC for supporting a structure.
(Prestressed concrete) In the production of concrete pillars such as piles and PC poles used for telephone poles, etc., for disconnecting pillars manufactured by connecting a plurality of pillars in the axial direction through joint fittings It is about technology.

[0002]

2. Description of the Related Art Conventionally, PC (prestressed concrete) piles for supporting structures, and Ps used for telephone poles, etc.
In manufacturing a concrete pillar such as a C pole, to manufacture a concrete pillar in which two or more prestresses are introduced in one formwork, for example,
Japanese Patent Application No. 2-40084 is known. This patent application 2
No. 40086, a plurality of rebar cages serving as a core material are set along the axial direction of a mold in a lower mold of a mold which is divided into upper and lower semicircles, and adjacent rebars are set. The baskets are connected to each other via fittings.In this state, the lower mold is filled with a predetermined amount of ready-mixed concrete, and the upper mold is covered and fastened and sealed. A tension rod connected in advance is pulled in the axial direction from the outside of the formwork and tension is applied to a plurality of reinforcing bars inside the form via joint fittings (in the tension state, the tension rod is engaged with the fixing plate of the formwork). Usually, the mold is placed on a centrifugal molding apparatus, and the mold is rotated at a high speed to perform centrifugal molding to form a concrete pillar such as a PC pile or a PC pole. .

After manufacturing as described above, the work of removing the upper mold frame and separating the columnar body and the joint fitting has been performed manually in the lower mold frame.

[0004]

However, in the above-described conventional example, since the work of separating the columnar body and the joint fitting is manual work, it takes time and labor, and the separation work is also difficult. Is performed while the plurality of columnar bodies connected by the fittings are placed in the lower mold, so that the work of releasing the connection in the narrow lower mold is not only complicated, but also involves a danger. was there. Furthermore, since the joint fitting itself is made to be of an extendable type, a split type, or a joint fitting having a complicated structure for performing the releasing operation, there is a problem that the releasing operation is further complicated.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to automatically form a columnar body outside a mold using a joint fitting having a simple structure. An object of the present invention is to provide a method and an apparatus for releasing connection of a columnar body that can be separated from a fitting.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, a method of releasing connection of a columnar body according to the present invention uses a columnar body manufactured by connecting a plurality of columnar bodies via a joint fitting 1 in the axial direction. In disconnecting the body 2, the connecting means 3 provided on the joint fitting 1 and the connected means 4 provided on the end of the columnar body 2 are rotated around an axis and the axial direction of the columnar body 2 and the joint fitting 1. In the method of releasing the connection of the columnar body 2 for releasing the connection by moving in the direction of separating, the joint metal fitting holding means 5
To hold the joint fitting 1 from the outer peripheral surface, and to rotate the column 2 by the column rotating means 6 to release the engagement between the connected means 4 and the connecting means 3. Thus, the columnar body 2 is moved in the axial direction by the columnar body moving means 7 while the joint fitting 1 is gripped and held from the outer peripheral surface, and the connected means 4 is pulled out from the joint fitting 1.

[0007] Further, the connection releasing device for a columnar body of the present invention comprises:
In disconnecting the columnar members 2 manufactured by connecting a plurality of the columnar members 2 in the axial direction via the joint fittings 1, the connecting means 3 provided on the joint fittings 1 and the connected means 4 provided on the ends of the columnar bodies are rotated. In a device for releasing the connection of the columnar body 2 for releasing the connection by the operation and the movement of the columnar body 2 and the fitting 1 in the axial direction away from each other, a joint fitting holding means 5 for holding the fitting 1 from the outer peripheral surface. And a column rotating means 6 for rotating the column 2 about an axis, and a column moving means 7 for moving the column 2 in the axial direction.

It is preferable that the column rotating means 6 on which the column 2 is mounted and rotated about an axis comprises a plurality of rotating rollers 8 which support the column 2 at predetermined intervals in the circumferential direction. . It is also preferable that the columnar body rotating means 6 for mounting the columnar body 2 and rotating the columnar body about an axis is formed so as to be rotatable in a direction orthogonal to the axial direction of the columnar body 2.

Further, a joint fitting holding means 5 for holding the joint fitting 1 for connecting the column 2 from the outer peripheral surface thereof has an arm 9 which is opened and closed so as to be sandwiched between the outer periphery of the column 2 and an end of the arm 9. It is also preferable that the pair of chuck hands 10 hold and hold the outer peripheral surface of the joint fitting 1.

[0010]

According to the present invention having the above-described structure, the joint member 1 is held by the joint member holding means 5 from the outer peripheral surface so as to prevent the joint member 1 from rotating. By rotating the columnar body 2 by the rotating means 6, the engagement between the connected means 4 and the connecting means 3 is released. Next, in this state, the columnar body 2 is moved in the axial direction by the columnar body moving unit 7 in a state where the joint fitting 1 is gripped from the outer peripheral surface and held by the joint fitting holding unit 5, whereby the connected unit 4 is moved. , And the column 2 is automatically detached from the joint fitting 1.

An apparatus for automatically detaching the column 2 from the joint 1 comprises a joint holder 5 for holding the joint 1 from the outer peripheral surface, and a column for rotating the column 2 about an axis. By constituting the apparatus with the body rotating means 6 and the columnar body moving means 7 for moving the columnar body 2 in the axial direction, the columnar body 2 is held in a columnar state while the joint fitting 1 is held by the joint holder 5. The columnar body 2 is rotated around the axis by the body rotating means 6 to release the engagement between the connected means 4 and the connecting means 3, and the columnar body 2 is moved in the axial direction by the columnar body moving means 7, thereby connecting the columnar body 2 to the joint fitting. 1 can be automatically pulled out, and the columnar body 2 can be automatically detached from the joint fitting 1 with a simplified device.

Further, the column rotating means 6 on which the column 2 is mounted and rotated about the axis is constituted by a plurality of rotating rollers 8 which support the column 2 at predetermined intervals in the circumferential direction. When the columnar body 2 is mounted on the columnar body rotating unit 6 and rotated, the columnar state rotating unit 6 can be formed with a simple configuration by rotating the rotating roller 8.

Further, if the columnar body rotating means 6 for mounting the columnar body 2 and rotating it around the axis is formed so as to be rotatable in a direction orthogonal to the axial direction of the columnar body 2, the columnar body rotating means 6 When the columnar body 2 is placed on the columnar body, or when the columnar body rotating means 6 is turned on in a direction orthogonal to the axial direction of the columnar body 2 when the columnar body 2 is sent to the next step after being placed on the columnar body 2,
Can be placed on the product or sent to the next process after the product is placed on the product.

A joint fitting holding means 5 for holding the joint fitting 1 for connecting the column 2 from the outer peripheral surface thereof has an arm 9 which is opened and closed so as to be sandwiched between the outer periphery of the column 2 and an end of the arm 9. By using a pair of chuck hands 10 for gripping and holding the outer peripheral surface of the joint fitting 1, the joint fitting holding means 5 can be formed with a simple structure.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is an overall front view of the apparatus used in the present invention, and FIG. 2 is an overall side view. In the figure, reference numeral 11 denotes a running rail,
A plurality of transfer rotating devices 12 are mounted so as to be able to run freely,
The transfer rotating device 12 includes a columnar body rotating means 6 described later,
A column moving means 7 is provided. Reference numeral 13 denotes a beam erected on a column 14, which is provided with an upper rail 15. The upper rail 15 is parallel to the traveling rail 11, and a fitting holding device 16 is mounted so as to be able to travel freely. The joint fitting holding device 16 is provided with joint fitting holding means 5. Then, the joint fitting holding device 16 is connected to the transfer rotating device 12.
Travels in parallel on the upper position of the travel locus.

FIGS. 3 to 10 show a transfer rotating device 12. The transfer rotating device 12 rotates a traveling wheel 18 provided on a traveling carriage 17 by rotating a motor 19a such as a geared motor by sprockets 20a, 20b, and 20. The power is transmitted through the transmission chain 21 and travels on the travel rail 11.
The column moving means 7 is constituted by various mechanisms for moving the traveling carriage 17 with respect to the traveling rail 11.

As shown in FIG. 7, a side protruding portion 22 is provided on a side portion of the traveling carriage 17, and supporting rollers 23 are provided above and below the side protruding portion 22, and upper and lower supporting rollers are provided. Numeral 23 is in rolling contact with the opposing surfaces of the pair of upper and lower support rails 24. The carriage 17 does not rise and tilt.

Rolling rails 25 are provided on both sides of the upper part of the traveling carriage 17. The rolling rail 25 is elongated in a direction orthogonal to the traveling rail 11. A rotating shaft 27 is rotatably supported between the rolling rails 25 by a bearing 26 provided on the upper surface side of the traveling vehicle 17. A rotating disk 28 is mounted on the rotating shaft 27 so as to be rotatable with respect to the rotating shaft 27. A concave portion 29 is provided in the circumferential direction of the outer peripheral portion of the rotating disk 28 (in the embodiment of FIG. 8, approximately half the circumferential direction). Recess 2
9), and a plurality of support arms 30 are provided in the recess 29 radially with respect to the rotation shaft 27. Rotating rollers 8a, 8b, 8c,... For constituting the column rotating means 5 are provided at the tip of each support arm 30, respectively.
Here, as shown in FIG. 8, the opening angle α between the center of the rotating roller 8a and the center of the rotating roller 8b about the axis of the rotating shaft 27, and the rotation about the axis of the rotating shaft 27. The opening angle β between the center of the roller 8b and the center of the rotating roller 8c is set to be different. In this case, the pile-shaped body 2 is supported by two rotating rollers adjacent to each other in the circumferential direction (that is, the pile-shaped body 2 is supported by the rotating roller 8a and the rotating roller 8b, and the rotating roller 8b, And the rotating roller 8c may support the pile 2), but the angle between adjacent rotating rollers about the rotating shaft 27 is changed according to the diameter of the column 2.

As shown in FIGS. 3 to 7, the traveling carriage 17 is provided with motors 19b and 19c such as geared motors. The rotation of the motor 19b is controlled by the gear 32a,
The power is transmitted to the rotary disk 28 via the rotary shaft 32b. Here, the gear 32b is fixed to the turntable 28.
A gear 32c is fixed to the rotating shaft 27, and the gear 32c has a plurality of rotating rollers 8a, 8b, 8c, respectively.
The gear 19d is engaged with a gear 32d provided on a shaft 33 of the motor c, and the rotation of the motor 19c transmits the rotation to the rotation shaft 27 via the gears 32e and 32f.
c, each rotating roller 8a, 8b, 8c via gear 32d
To rotate each of the rotation rollers 8a, 8b, 8c.

A plurality of locking parts 34 as shown in FIG.
Is provided. On the other hand, the traveling carriage 17 is provided with a support frame 35 as shown in FIG. 10, and the support frame 35 is provided with a guide box 36.
The lower part of the movable body 37 is movably fitted in the movable body 37, and the movable body 37 is pressed upward by a spring 38. A positioning roller 39 is provided at the upper end of the moving body 37. The positioning roller 39 is in elastic contact with the outer peripheral surface of the rotating disk 28 opposite to the concave portion 29, and the rotating disk 28 rotates. By doing so, when the elastic contact position changes and comes to the position of the locking portion 34, the positioning roller 39 is elastically inserted and locked in the locking portion 34. Here, the rotating rollers 8a, 8b, and 8c are positioned at the positions shown in FIG. 14A (where only the rotating rollers 8b protrude upward from the rolling rails 25) and at the positions shown in FIG. The position where the rotating roller 8b projects upward from the rolling rail 25), the position shown in FIG. 14C (the position where only the rotating roller 8a projects upward from the rolling rail 25), and FIG.
5 (a) (only the rotating roller 8c is on the rolling rail 2).
5), the position shown in FIG. 15B (the rotating rollers 8b and 8c are
5 (position protruding upward from the rolling rail 25) and the position shown in FIG. 15C (position where only the rotating roller 8b protrudes upward from the rolling rail 25). The positions of the plurality of locking portions 34 are set so that the rotating plate 28 can be positioned by locking. here,
Although the position in FIG. 14A and the position in FIG. 15C are different positions in the attached drawings, when only the rotating roller 8b protrudes upward from the rolling rail 25, both positions are the same. It may be.

As described above, the movable carriage 17 is used for the traveling rail 1.
2, the moving carriage 17 moves in the gap between the end of the loading rail 40 and the starting end of the unloading rail 41, as shown in FIG. Here, the loading rail 40 and the traveling rail 1
1. Each of the unloading rails 41 is inclined so that the terminal end side becomes lower, and the columnar body 2 rolls along the inclination. Then, a plurality of columnar bodies 2 manufactured by connecting a plurality of columns in the axial direction via the joint fittings 1 are carried in from the carry-in rail 40, and the movable carriage 1 is moved from the starting end of the carry-in rail 40.
7 and rolls over the rolling rail 25 provided thereon, separates the columnar body 2 and the joint fitting 1 as described later, and then rolls only the columnar body 2 from the rolling rail 25 to the unloading rail 41. And transfer it to the next process. Here, in FIG.
2 is provided with a stopper 43 composed of a roller so as to be movable. The columnar body 2 manufactured by connecting a plurality of the connecting rails via the joint fitting 1 that rolls the loading rail 40 is stopped by the stopper 43, and the cylinder is stopped. When the stopper 100 is operated and the stopper 43 is depressed to release the stop, the plurality of columnar members 2 connected and manufactured via the joint fitting 1 are rolled to the rolling rail 25 side. Further, in the embodiment, as shown in FIG.
It is fixed to.

FIGS. 11 to 13 show a joint fitting holding device 16 mounted on the upper rail 15 so as to be able to travel. The joint bracket holding device 16 is provided with a traveling wheel 45 on the traveling base 44, and the traveling wheel 45 provided on the traveling base 44 is rotated via a gear 47 by a motor 46a such as a geared motor, thereby forming an upper rail. 15. A support frame 48 is provided on the traveling base 44,
A guide rod 49 is inserted through the support frame 48 so as to be vertically movable. A lift table 50 is attached to the lower end of the guide rod 49. The lift table 50 is vertically moved up and down by a screw jack 51 that is rotated by a motor 46b such as a geared motor.
The elevating table 50 is provided with joint fitting holding means 5 for holding the joint fitting 1 connecting the columnar body 2 from the outer peripheral surface.
The joint fitting holding means 5 includes a pair of substantially rectangular arms 9 rotatably supported by a lifting table 50, and a chuck hand 10 rotatably supported by a pin 101 at the tip of each arm 9. And a cylinder device 5 such as a hydraulic cylinder or an air cylinder between the pair of arms 9.
The distance between the chuck hands 10 at the tips of the pair of arms 9 is made closer or farther away by driving the cylinder device 52. Here, a fan-shaped member 53 is provided at the upper end of both arms 9, and the arc edges of both fan-shaped members 53 are in contact with each other. When the cylinder device 52 is driven, the chuck hand 10 at the tip of both arms 9 is moved. Are coming and going at the same rate. Here, the arc edges of both fan-shaped members 53 may be engaged with each other as a gear.

A columnar member 2 manufactured by connecting a plurality of members in the axial direction through joint fittings 1 using the apparatus having the above-described structure.
Is released as described later. Before explaining the release of the connection, a process of manufacturing a plurality of columnar bodies 2 through the joint fitting 1 will be briefly described. As shown in FIG. 19, a plurality of rebar cages 54 serving as a core material are set along the axial direction of the mold in the lower mold of the mold divided into two vertically and semicircularly, and adjacent rebar baskets 54 are connected to each other. In this state, the lower mold is filled with a predetermined amount of ready-mixed concrete, and the upper mold is covered and fastened and sealed. The connected tension rods are pulled in the axial direction from the outside of the formwork and tension is applied to a plurality of reinforcing bars inside the form via the joint fitting 1 (in the tension state, the tension rods are engaged with the fixing plate of the formwork). Stop), the mold is placed on a centrifugal molding apparatus, and the mold is rotated at a high speed to perform centrifugal molding, and a concrete pillar 2 such as a PC pile or a PC pole is axially attached to the joint fitting 1. And manufacture a plurality of them.

Here, the connection between the joint fitting 1 and the reinforcing rod cage 54 is performed by connecting the connected means 4 provided on the end fitting 55 provided at the end of the reinforcing rod cage 54 to the connecting means 3 provided on the joint fitting 1. It is done by doing. In the embodiment, as shown in FIG. 19, the reinforcing bar cage 54 is configured by fixing main bars 56 arranged in parallel in the circumferential direction to each other with hoop bars 56 a, and an end fitting 55 is attached to an end of the reinforcing bar cage 54. (That is, the end of the main bar 56 is attached to the end fitting 55). A bolt is protruded from the end fitting 55 by screwing a threaded portion at the rear end of the bolt. The bolt constitutes the connected means 4. The head portion of the bolt shaft portion 57 has a head portion of the bolt, and the head portion forms an enlarged portion 58. In addition, a base-side enlarged portion 59 is provided at the protruding base portion of the shaft portion 57.

As shown in FIG.
An engagement plate 61 having a diameter larger than that of the body 60 is provided at both ends of the holding plate 62. A holding plate 62 is overlapped on the outer side of the engagement plate 61 so as to be rotatable in the circumferential direction. Here, the engagement plate 6
As shown in FIG. 1, a gourd-shaped engaging hole 63 is formed at a same pitch in the circumferential direction to constitute a plurality of connecting means 3. The engaging plate 61 has a plurality of holes 64 at the same pitch.
A plunger 65 elastically urged in a direction to protrude into the hole 64 is fitted. FIG.
As shown in FIG. 8, a screw hole 66 is provided in the engagement plate 61. As shown in FIG. 17, the holding plate 62 has a plurality of circular holding holes 67 at the same pitch corresponding to the gourd-shaped engagement holes 63.
Are provided, and a plurality of arc-shaped long holes 68 are provided at the same pitch corresponding to the screw holes 66. As shown in FIG. 16, the outer half of the holding plate 62 has a large diameter so that the head of the screw 69 can be inserted, and the inner half has a screw 6.
9 has a small diameter so that the head cannot be inserted and only the shaft of the screw 69 can be inserted. The holding plate 62 is attached to the outside of the engagement plate 61 so as to be rotatable in the circumferential direction by screwing a screw 69 inserted into the arc-shaped long hole 68 into the screw hole 66. In this case, the holding plate 62 can rotate with respect to the engagement plate 61 within a range in which the screw 69 can move along the arc-shaped long hole 68. The holding plate 62 is provided with two sets of engaging holes 70 corresponding to the plungers 65 at the same pitch in the circumferential direction.
Is turned to one side along the arc-shaped long hole 68, the plunger 65 is inserted into one of the two engagement holes 70 of the set of engagement holes 70.
And when the holding plate 62 is rotated to the other side along the arc-shaped long hole 68, the plunger 65 is inserted into the other engagement hole 70 of the set of two engagement holes 70. Has become. When the plunger 65 is inserted into one of the engagement holes 70, the circular holding hole 67 is inserted into the large hole 6 of the gourd-shaped engagement hole 63.
3a, the circular holding hole 67 is formed into a gourd-shaped engaging hole 63 with the plunger 65 resiliently inserted into the other engaging hole 70.
Are set to face the small holes 63b. here,
Large hole 63a of gourd-shaped engagement hole 63 and circular holding hole 6
7 are large enough to insert the enlarged portion 58 of the connected means 4.
The size of the third small hole 63b is such that the shaft portion 57 of the connected means 4 can be inserted, but the enlarged portion 58 cannot be inserted. In addition, the base-side enlarged portion 59 of the connected means 4 is large enough to fit into the circular holding hole 67.

Then, the enlarged portion 58 of the connected means 4 is inserted from the circular holding hole 67 into the large hole 63a of the gourd-shaped engaging hole 63 so that the enlarged portion 58 projects outside the large hole 63a and the base side is enlarged. The part 59 is fitted into the circular holding hole 67,
The shaft 57 of the connected means 4 is moved from the large hole 63a to the small hole 63b by rotating the reinforcing rod 54 or the joint fitting 1 (in this case, the base-side enlarged portion 59 is fitted into the circular holding hole 67). Therefore, the holding plate 62 rotates) and the enlarged portion 58
Is located outside the small hole 63b. For this reason, steel cage 5
Even if a tensile force acts on the four reinforcing rods 54, the enlarged part 58 is located outside the small hole 63 b and does not come off.
End fittings 55 are connected to both sides of the joint fitting 1. In this case, the plunger 65 is further elastically engaged with the one engagement hole 70 to maintain the connected state. For this reason, the state in which the connected means 4 enters the small hole 63b is maintained even when suspended by a crane or the like, and does not shift to the large hole 63a side. One reinforcing bar 5 is provided on one side of the fitting 1.
After the end fitting 55 at the end of the fourth fitting 4 is connected as described above, the end fitting 5 of the other reinforcing rod cage 54 is attached to the other side of the joint fitting 1.
5 may be connected in the same manner as described above, or the end fittings 55 of the ends of the reinforcing bars 54 may be simultaneously connected to both sides of the joint fitting 1 in the same manner as described above. . Similarly, two or more fittings 1 may be provided to connect three or more rebar baskets 54. The one in which the reinforcing bars 54 are connected by the fittings 1 in this manner is lifted by a crane and sent to the lower mold, and is set in the lower mold with the reinforcing bars 54 connected by the fittings 1. It is.

In this manner, a plurality of reinforcing bars 5
4 are connected in the axial direction via the joint fittings 1. In this state, a predetermined amount of ready-mixed concrete is filled in the lower mold, and the upper mold is covered and fastened and sealed. The tension rod previously connected to the end of the mold is pulled in the axial direction from the outside of the formwork, and tension is applied to a plurality of reinforcing bars inside the form via the joint fitting 1 (the tension rod is pulled in the form of the formwork). The mold is placed in a centrifugal molding apparatus, and the mold is subjected to high-speed rotation to perform centrifugal molding, and a concrete columnar body 2 such as a PC pile or a PC pole is axially moved. And a plurality of them are formed and manufactured via a joint fitting 1.

When the manufacturing is completed, the upper mold is opened, and the plurality of columnar bodies 2 are taken out from the lower mold while being connected in the axial direction via the joint fitting 1, and the joints are taken out from the lower mold in the axial direction. The plurality of columnar bodies 2 connected via the metal fittings 1 are supplied onto the carry-in rail 40 and roll on the carry-in rail 40. The plurality of columnar bodies 2 connected via the joint fittings 1 in the axial direction in which the carry-in rails 40 rolled are connected to the carry-in rails 40.
Is stopped by the stopper 43 near the terminal end of the camera and enters a standby state. Here, the traveling carriage 17 moves along the traveling rail 11 to a preferable supporting position according to the length of the columnar body 2. Further, the rotating roller 8 may be used in accordance with the diameter of the column 2.
a, 8b, and 8c, which set of the rotating rollers supports the columnar body 2 is selected, and the selected set of the rotating rollers enters the standby posture. For example, when the set of rotating rollers corresponding to the columnar body 2 to be separated is the rotating rollers 8a and 8b, the rotating plate 28 is rotated by the motor 19b and the rotating rollers 8a and 8b are moved to the positions shown in FIG. Position as shown. FIG. 14A shows a state in which the rotating roller 8a is positioned below the rolling rail 25 and the rotating roller 8b is positioned so as to protrude above the rolling rail 25. The rotating rollers 8a and 8b are shown in FIG.
In the standby position (a), the stopper 43 moves, and the plurality of columnar bodies 2 connected via the joint fittings 1 move from the end of the loading rail 40 onto the rolling rail 25, and the rolling rail 25 moves. 25, and hits the rotating roller 8b projecting on the rolling rail 25. In this state,
By driving the motor 19b, the turntable 28 is rotated by a certain angle,
The columnar body 2 is lifted upward by a pair of rotating rollers 8a and 8b and floated above the rolling rail 25, as shown in FIG.
The state shown in FIG. On the other hand, the fitting holding device 16 is moved along the upper rail 15 according to the position of the fitting 1 (that is, the position of the fitting 1 varies depending on the length of the columnar body 2), and FIG. In a state where the columnar body 2 is lifted upward by a pair of rotating rollers 8a and 8b and floated above the rolling rails 25, the lifting table 50 is lowered and the cylinder device 52 is operated to operate the joint fitting. The outer periphery of the fitting 1 is gripped and held by the chuck hand 10 of the holding means 5 as shown in FIG. The columnar body 2 is rotated by driving the motor 19c and rotating the rotating rollers 8a and 8b while the outer periphery of the joint fitting 1 is gripped and held by the joint fitting holding means 5 in this manner. When the columnar body 2 is rotated, the connected means 4 provided on the columnar body 2 rotates with respect to the connecting means 3 provided on the joint fitting 1. That is, the shaft portion 57 of the connected means 4 moves from the small hole 63b of the gourd-shaped engagement hole 63 to the large hole 63a, and the enlarged portion 58 at the tip of the shaft portion 57 faces the large hole 63a. In this state, the traveling carriage 17 is moved along the traveling rail 11. By moving the traveling carriage 17 in this manner, the columnar body 2 moves in a direction away from the joint fitting 1 in the axial direction. When the columnar body 2 moves in the direction away from the joint fitting 1 in the axial direction, the enlarged portion 58 of the connected means 4 is pulled out from the large hole 63a of the gourd-shaped engaging hole 63 of the connecting means 3 to the outside.
As a result, the columnar body 2 is separated from the fitting 1. When the plurality of columnar bodies 2 are separated from the joint fitting 1 in this manner, the motor 19b is rotated, and the rotating disk 28 is rotated by a predetermined angle to the state shown in FIG. As a result, each pillar 2 lifted and supported by the pair of rotating rollers 8a and 8b is dropped by the rolling rail 25 and rolls from the end of the rolling rail 25 to the beginning of the unloading rail 41, It rolls on the carry-out rail 41 and is carried out to the next process. On the other hand, the joint fitting 1 detached from the columnar body 2 is gripped and held by the joint fitting holding means 5 and
And the traveling base 44 is moved along the upper rail 15 to the end of the upper rail 15 to move it above the joint fitting unloading device 71, where the elevator 50 is lowered, and the joint fitting holding means 5 is moved. Is opened and the joint fitting 1 is placed on the joint fitting unloading device 71, and is unloaded by the joint fitting unloading device 71. When the columnar body 2 is rolled from the end of the rolling rail 25 to the unloading rail 41 and the joint fitting 1 is unloaded as described above, the motor 19b rotates in the reverse direction to rotate the rotating rollers 8a and 8b as shown in FIG. The traveling base 44 returns to the original position and enters the standby state again, and the same sequence as described above is repeated.

On the other hand, when the diameter of the column 2 is different, the above operation is performed by another set of rotating rollers 8b and 8c corresponding to the diameter instead of the set of rotating rollers 8a and 8b. That is, the difference from the above embodiment is that the loading rail 40
Columnar bodies 2 connected in the axial direction by joint fittings 1
15A is rolled by the rolling rail 25 as shown in FIG. 15A, and is rolled up as shown in FIG. 15B when the columnar body 2 is lifted up and floated by the rotating rollers 8b and 8c. When the connection release operation is completed and the columnar body 2 is moved onto the rolling rail 40 again and rolled toward the unloading rail 41, the column 2 is operated to be positioned as shown in FIG. However, other operations are the same as those in the above embodiment.

[0030]

According to the invention of the method of the present invention, as described above, the fitting is held from the outer peripheral surface by the fitting holding means, and the column is rotated by the column rotating means to be connected. The engagement between the means and the connecting means is released, and then the columnar body is axially moved by the columnar body moving means in a state where the fitting is held and held by the fitting holding means from the outer peripheral surface, thereby connecting the connected means. Since it is pulled out from the joint fitting, the columnar body can be automatically detached from the joint fitting when disconnecting the columnar body manufactured by connecting a plurality of columnar bodies in the axial direction via the joint fitting. The columnar body can be removed from the joint fitting in a short time and safely.

In the apparatus according to the present invention, a device for automatically detaching the column from the joint is provided with a joint holder holding means for holding the joint from the outer peripheral surface, and the column is rotated around the axis. Since it is constituted by the columnar body rotating means for rotating and the columnar body moving means for moving the columnar body in the axial direction, the columnar body can be automatically detached from the joint fitting with a simplified device. .

Further, the column rotating means for mounting the column and rotating the column around the axis is constituted by a plurality of rotating rollers which support the column at a predetermined interval in the circumferential direction of the column, thereby enabling the column rotating. When the columnar body is mounted and rotated by the means, the columnar state rotating means can be formed with a simple configuration. Further, when the columnar body rotating means for mounting the columnar body and rotating it around the axis is formed so as to be rotatable in a direction orthogonal to the axial direction of the columnar body, the columnar body may be mounted on the columnar body rotating means. On the occasion of sending to the next step after the loading, the column rotating means is rotated in a direction orthogonal to the axial direction of the pillar to load the column on the column rotating means, or to the next step after being loaded. It becomes possible.

The joint fitting holding means for holding the joint fitting for connecting the column from the outer peripheral surface is provided on the outer periphery of the column and opening and closing the arm so as to be sandwiched between the arm and the outer peripheral surface of the joint fitting at the arm end. Is constituted by a pair of chuck hands for holding and holding the joint fitting, the joint fitting holding means can be formed with a simple structure.

[Brief description of the drawings]

FIG. 1 is an overall schematic front view of the apparatus of the present invention.

FIG. 2 is an overall schematic side view of the same.

FIG. 3 is a front view of the transfer rotating device of the above.

FIG. 4 is a plan view of the same.

FIG. 5 is a rear view of the same.

FIG. 6 is a right side view of the same.

FIG. 7 is a left side view of the same.

FIG. 8 is a side view showing a rotary roller part of the above.

FIG. 9 is a side view showing a positioning roller of the above.

FIG. 10 is a front view showing a positioning roller part according to the third embodiment.

FIG. 11 is a side view of the joint fitting holding device of the above.

FIG. 12 is a front view of the same.

FIG. 13 is a plan view of the same.

FIGS. 14 (a), (b) and (c) are explanatory diagrams of the operation when a pair of rotating rollers are used.

FIGS. 15 (a), (b) and (c) are explanatory views of the operation when another set of rotating rollers is used.

FIG. 16 is an exploded cross-sectional view of the joint fitting.

17A and 17B show the holding plate of the above, wherein FIG. 17A is a front view and FIG. 17B is a rear view.

FIG. 18 is a front view showing the same engaging plate.

FIG. 19 is a partially broken cross-sectional view showing a state in which the end fitting provided at the end of the rebar cage is connected to the above-mentioned joint fitting.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 joint fitting 2 columnar body 3 connecting means 4 connected means 5 joint fitting holding means 6 pillar rotating means 7 pillar moving means 8 rotating roller 9 arm 10 chuck hand

Continuation of the front page (56) References JP-A-52-139125 (JP, A) JP-A-49-129713 (JP, A) JP-A-3-211014 (JP, A) JP-A-64-55207 (JP, A) JP-A-5-96525 (JP, A) JP-A-3-243307 (JP, A) JP-A-57-101008 (JP, U) JP-B-50-29488 (JP, B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B28B 11/00-23/22

Claims (5)

(57) [Claims] When disconnecting a plurality of pillars manufactured by connecting a plurality of pillars in the axial direction via a fitting, a connecting means provided on the fitting and a connected means provided at an end of the pillar are connected to each other. In a method of releasing connection of a columnar body for releasing connection by a rotation operation around and movement of a columnar body and a joint fitting in an axial direction away from each other, the joint fitting is held from an outer peripheral surface by a fitting holding means by a fitting holding means. Then, the columnar body is rotated by the columnar body rotating means to release the engagement between the connected means and the connecting means, and then the columnar body is held by holding the joint fitting from the outer peripheral surface by the joint fitting holding means. A method of releasing connection of a columnar body, wherein the columnar body is moved in an axial direction by a columnar body moving unit to pull out a connected unit from a joint fitting. 2. A method of uncoupling a plurality of pillars manufactured by connecting a plurality of pillars in the axial direction via joints, the coupling means provided on the joints and the connected means provided at the ends of the pillars. In a columnar body disconnection releasing device for releasing connection by rotating around and moving the columnar member and the joint fitting in a direction away from each other in the axial direction, a joint fitting holding means for holding the joint fitting from the outer peripheral surface, An apparatus for releasing connection of a columnar body, comprising: a columnar body rotating means for rotating the columnar body around an axis; and a columnar body moving means for moving the columnar body in an axial direction. 3. The column rotating means for mounting the column on the column and rotating the column about an axis comprises a plurality of rotating rollers supporting the column at predetermined intervals in the circumferential direction of the column. Column disconnection device. 4. The column rotating means for mounting the column and rotating the column around the axis is formed so as to be rotatable in a direction perpendicular to the axial direction of the column. Disconnecting device for pillars. 5. An arm for holding a joint fitting for connecting the columnar body from the outer peripheral surface, the arm being open / close so as to be sandwiched on the outer periphery of the columnar body, and an outer peripheral surface of the joint fitting at the arm end. 3. The apparatus for releasing connection of a columnar body according to claim 2, wherein the apparatus comprises a pair of chuck hands for gripping and holding the column.