JPH07208434A - Coupling device - Google Patents

Abstract

PURPOSE:To surely couple a wrench to a screw member within a short period of time by constituting the screw member with a polygonal pillar part and a polygonal or truncated pyramid end part whose size becomes smaller as it separates from the pillar part integrally following the pillar part. CONSTITUTION:When the pillar part 18a of a screw member 18 is fitted in the recessed part of a rotary body, the rotary body approaches the screw member 18 and thus the end part 18b of the screw member 18 is placed in the recessed part of the rotary body. When the positions of the rotary body and the screw member 18 are not coincident with each other, the opening end of the recessed part is brought into contact with the polygonal or truncated pyramid end part 18b of the screw member 18 and a pressing force is applied to the screw member 18. When the rotary body does not rotate a relative rotation is generated between the rotary body and the screw member 18 by means of a pressing force, and during the rotation of the rotary body a recessed part inner surface angle part is engaged with the outer surface angle part of the end part 18b by means of the rotation. When the rotary body is further pushed to the screw member 18, the pillar part 18a of the screw member 18 is fitted in the recessed part of the rotary body. Thus, the rotary body is surely engage with the screw member within a short period of time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for connecting a mold for molding secondary concrete products.

[0002]

2. Description of the Related Art As a mold for centrifugal force molding of a secondary concrete product, for example, as described in Japanese Patent Publication No. 59-49169, each has a semicircular cross-sectional shape and opposite side portions. A pair of halves each having a flange are used. The two halves are fastened by a screw member including a bolt and a nut at each of a plurality of opposed flanges.

One of the so-called joining devices for joining the half halves of a mold of this type is described in the above publication. This known fastening device includes a plurality of screw members arranged on the mold,
A so-called tightening / loosening machine that tightens or releases the screw member is included.

The loosing machine moves a plurality of processing mechanisms together with the molds while continuously moving the mold in which the screw members are arranged in one direction, while rotating the screw members with a wrench of each processing mechanism. Let The processing mechanism is advanced one after another along with the movement of the mold, and is returned to the initial position after the tightening or the release thereof. In the present invention, the moving direction of the mold is referred to as the front-rear direction, and the horizontal direction that crosses the moving path of the mold at a substantially right angle is referred to as the left-right direction.

Each wrench is moved by the moving mechanism toward the screw member of the form and engaged with the screw member while the corresponding processing mechanism is moved together with the mold, and then tightened or released by the screw member. Then, after that, the moving mechanism moves in a direction away from the screw member to release the engagement with the screw member.

However, in the known tightening and loosening device, the head of the screw member and the recess of the wrench for receiving the screw member have only a hexagonal cross-sectional shape. If they do not match, the head of the screw member and the recess of the wrench cannot be fitted, and the screw member cannot be tightened or released.

As one of the screw members used in the fastening device,
A screw member in which a truncated cone-shaped tip portion is formed on the head has been proposed (Japanese Utility Model Publication No. 5-2006). However, when such a screw member is used, even if the axis of rotation of the wrench and the axis of the screw member match, the recess of the wrench and the head of the screw member around the axis of rotation of the wrench and the axis of the screw member Unless the positional relationship with the parts does not match,
Since the open end of the recess of the wrench only contacts the tip of the screw member and the screw member is not rotated angularly with respect to the wrench, the head of the screw member and the recess of the wrench do not fit together.

In order to solve the above problem, it is conceivable to bring the wrench close to the screw member while rotating the wrench head portion having the recess. But if you do this
With the open end of the recess of the wrench in contact with the tip of the screw member, the wrench head part idles without rotating the screw member, and as a result, the head of the screw member and the recess of the wrench are separated. It may not be possible to fit them.

Contrary to the above, when the screw member is rotated together with the wrench while the open end of the recess of the wrench is in contact with the tip of the screw member, the open end of the recess of the wrench is Since the screw member is rotated together with the wrench with the tip part bite (engaged), it takes time until the head of the screw member and the recessed part of the wrench fit together. The efficiency is low.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure in which a wrench and a screw member are securely engaged with each other in a short time.

[0011]

In the coupling device of the present invention, the screw member has a polygonal columnar portion and a polygonal pyramidal or truncated pyramidal end portion corresponding to the columnar portion. And an end portion that is integrally continuous with the portion and that becomes smaller as the distance from the columnar portion increases.

The wrench used for the screw member of the present invention has a recess having a polygonal cross-sectional shape corresponding to the columnar portion of the screw member. The screw member is rotated by the wrench with the columnar portion of the screw member fitted in the recess of the wrench.

When the columnar portion of the screw member and the recess of the wrench are fitted together, the wrench is moved closer to the screw member so that the pyramidal or truncated pyramidal end of the screw member is first recessed in the wrench. And then the post of the screw member is received in the recess of the wrench. At this time, if the positional relationship between the wrench and the screw member does not match around the axis of rotation of the wrench and the axis of the screw member, the open end of the recess becomes the pyramidal or truncated pyramidal end of the screw member. Contact,
As a result, the screw member receives a pressing force.

However, when the wrench is not rotated, the pressing force causes relative angular rotation between the wrench and the screw member around the rotation axis of the wrench and the axis of the screw member. The corners of the inner surface are engaged with the corners of the outer surface of the pyramidal or truncated pyramidal end of the screw member. On the other hand, when the wrench is rotated, the corner of the inner surface of the recess of the wrench engages with the corner of the outer surface of the pyramidal or truncated pyramidal end of the screw member due to the rotation of the wrench. .

Accordingly, the wrench further has a positional relationship between the recess of the wrench around the rotation axis of the wrench and the axis of the screw member and the pyramidal or truncated pyramidal end of the screw member. By being pushed by, the recess of the wrench and the columnar portion of the screw member are fitted together.

According to the present invention, since the screw member has the polygonal columnar portion and the polygonal pyramidal or truncated pyramidal end portion corresponding to the columnar portion, the rotation axis of the wrench and the screw member Even if the positions of the wrench and the screw member around the axis do not match, the wrench and the screw member are reliably engaged in a short time.

The screw member may be arranged in a form frame formed in a tubular shape by connecting a pair of half-divided bodies so as to abut each other. Further, the screw member is a rod-shaped portion having a male screw at least at one end, and the rod-shaped portion integrally continuing at the other end on the side opposite to the pyramid-shaped or truncated pyramid-shaped end of the columnar portion. Or a nut having a threaded hole in at least the columnar portion.

Further, a wrench for releasably engaging the columnar portion of the screw member to rotate the screw member around its axis is a pyramid-shaped or truncated pyramid-shaped end portion side. It is possible to provide a polygonal cylindrical recess corresponding to the columnar portion.

Further, it includes a tightening machine for tightening or loosening the screw member, wherein the tightening machine has a support base and a columnar portion of the screw member in a polygonal cylindrical recess corresponding to the columnar portion in a pyramidal shape. Or at least one processing mechanism including a wrench that receives from the side of the truncated pyramid-shaped end and rotates the screw member around its axis, which is located at the rear of the moving direction of the mold in which the screw member is arranged. At least one processing mechanism that is moved from the position 1 to a second position in the front of the movement direction of the mold following the movement of the mold; and the processing mechanism moves from the first position to the second position. By the time it moves to the position, the wrench is moved toward the screw member to engage the wrench with the columnar portion, and the wrench is moved to disengage the wrench from the screw member. From the screw member A moving mechanism configured to move in a moving direction of the mold, the processing mechanism further including a first moving body disposed on the support table so as to be movable in a moving direction of the mold, and the first moving body. A second moving body is arranged so as to be movable in the vertical direction, and a connecting means for supporting the wrench on the second moving body so as to be elastically displaceable in a horizontal direction that intersects the moving direction of the mold. It is preferable.

As a result, even if the position of the wrench with respect to the screw member in the horizontal direction intersecting the moving direction of the form is incorrect, the wrench contacts the pyramidal or truncated pyramidal end of the screw member, When the wrench is further moved toward the screw member in this state, a displacement force in the horizontal direction that intersects the moving direction of the mold acts on the wrench, and this displacement force is absorbed by the connecting means. Securely engages the threaded member.

Instead of providing a polygonal pyramidal or truncated pyramidal end on the screw member, a recess is formed in the wrench to receive the polygonal columnar portion of the screw member, and the screw member is formed in the recess. A polygonal first part corresponding to the columnar part of the polygonal part, and a polygonal truncated pyramid second part corresponding to the first part and continuing from the first part. You may form the 2nd site | part which becomes large gradually toward the open end of the said recessed part from the site side.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 3, a coupling device comprises a plurality of fastening devices 20 arranged on a flange on one side of a form 12, and tightening or releasing of screw members of the fastening devices. And a tightening device 10 for

The mold 12 has a semicircular cross-sectional shape, and has a pair of half bodies 14a, 14 each having a flange extending in the longitudinal direction of the mold on one side edge or both side edges.
1 and 3 by a conveyance means (not shown) in a state in which the flanges are stacked on each other and are horizontal.
At, it is continuously moved from right to left.

For example, as shown in FIG. 9 of JP-B-59-49169, both halves have a flange only on one side edge and a hinge on the other side edge. In the case of the molds that are connected to each other by the like and are joined by the screw members at the flanges, one fastening device may be arranged in the vicinity of the moving path of the molds 12.

However, for example, Japanese Patent Publication No. 59-49169
In the case of the formwork described in FIG. 1 of the publication, in the case of a formwork in which each half body has a flange at each of the side edge portions and is joined by a screw member at each flange, It is preferable to dispose a pair of tightening / releasing devices so as to face each other with respect to the moving path of the form 12, and perform the tightening work of the screw member by the both tightening / loosening devices or the releasing work thereof in parallel.

As shown in a partially enlarged view of FIG. 4, the mold 12 has both halves 14a and 14b formed on its flange 16a,
16b is formed into a cylindrical shape by connecting with a screw member 18 at each of a plurality of positions, and is divided into a pair of half bodies 14a and 14b again by loosening the screw member 18.

In the embodiment shown in FIG. 4, the screw member 1
8 is a bolt of the fastening device 20, and a flange 16
a and 16b are fixed to the corresponding half halves 14a and 14b, respectively.

As shown in FIG. 4, the screw member 18 is a rod-shaped member having a polygonal columnar portion 18a, an end portion 18b coaxially and integrally continuing to one end of the columnar portion, and a male screw at least at one end portion. And a portion 18c. The end portion 18b is a truncated polygonal pyramid portion having a polygonal frustoconical shape corresponding to the columnar portion 18a, and becomes smaller with increasing distance from the columnar portion 18a. However, the end portion 18b may be a polygonal pyramid portion having a polygonal pyramid shape corresponding to the columnar portion 18a. The rod-shaped portion 18c has a columnar portion 18 at the other end thereof.
It coaxially and integrally follows the other end of a.

As shown in FIGS. 4 and 8, the fastening device 2
0 is a holding member 22 fixed to the lower surface of the lower flange 16a coaxially with a hole formed in the lower flange 16a,
Non-rotatably arranged in the holding member 22 and the screw member 18
A nut 24 screwed to the holding member 22.
A stopper 26 disposed in the holding member 22 to prevent the screw member 18 from falling off, and a cylindrical holding member which is fixed to the upper surface of the upper flange 16b coaxially with the hole formed in the upper flange 16b and receives the screw member 18. The member 28, a retaining ring 30 arranged in the holding member so as to prevent the screw member 18 from falling off the holding member 28, and the screw member 1
8 is provided with an annular spring bearing 32 arranged between the head and the holding member 28, and a compression coil spring 34 arranged between the holding member 28 and the spring bearing 32.

Referring again to FIGS. 1 to 3, the tightening and loosening device 1
0 is a support base 40 arranged beside the moving path of the formwork 12.
And a plurality of units that rotate the screw member 18 and are arranged so as to be capable of reciprocating between a first position behind the form frame 12 in the moving direction and a second position ahead thereof. (6 in the example) and engagement mechanisms arranged in each processing mechanism 42 so as to releasably engage with the mold 12 to move the corresponding processing mechanism 42 forward following the mold 12. 44, and a return mechanism 46 for simultaneously moving the advanced processing mechanism 42 from the second position side to the first position side,
And a braking mechanism 48 arranged in each processing mechanism 42 so as to generate a braking force at the end of the movement of the processing mechanism 42.

The support base 40 includes a pair of long bases 52 installed on the floor 50 in parallel with the moving path of the formwork 12, and both bases 5.
2, a long first movable table 54 that is vertically movable, and a first movable table 54 that horizontally moves across the moving path of the mold 12 (horizontal direction in FIG. 2). A second movable table 56 which is installed so as to support the processing mechanism 42.
With.

The first moving table 54 is moved in the front-rear direction and the left-right direction by a rod 58 extending upward from each end of each base 52 through each end of the first moving table 54. Be blocked. The position of the first moving table 54 in the vertical direction can be adjusted by a plurality of jacks 60 using a hydraulic or pneumatic cylinder mechanism or the like, thereby adjusting the height position of the processing mechanism 42 with respect to the mold 12. be able to. The rods 58 that are adjacent to each other in the left-right direction are connected by a connecting member 62 at the upper end portion.

The second movable table 56 is slidably engaged with a plurality of rails 64 provided on the upper surface of the first movable table 54 so as to extend in the left-right direction, whereby the up-down direction and the front-rear direction. It is prevented from moving to and. The position of the second moving table 56 in the left-right direction can be adjusted by the driving mechanism 66 arranged on the first moving table 54, and thereby the position of the processing mechanism 42 in the left-right direction with respect to the mold 12 is adjusted. be able to. The drive mechanism 66 is, in the illustrated example,
A screw jack including a rotation source such as an electric motor, a pneumatic motor, and a hydraulic motor.

The second moving table 56 has a pair of guide rails 68 on its upper surface for restricting the movement of the processing mechanism 42 with respect to the second moving table 56. The guide rails 68 extend parallel to the front-rear direction at locations on the upper surface of the second moving table 56 that are spaced apart in the left-right direction. The processing mechanism 42 includes a guide rail 68.
They are sequentially arranged in the direction of the guide rails 68 so that they can move in the same direction one after another. Therefore, the movement ranges of the processing mechanisms adjacent to each other in the front-rear direction largely overlap each other, but are slightly displaced in the front-rear direction.

Referring to FIG. 5, each processing mechanism 42 is guided by both guide rails 68 and is a frame arranged on the second moving table 56 so as to be reciprocally movable in the front-rear direction, that is, a first frame.
The moving body 70, the second moving body 72 arranged to be movable in the vertical direction on the first moving body, and the wrench 74 supported by the second moving body.

In the illustrated example, the wrench 74 is a wrench provided with a rotating mechanism having a pneumatic motor driven by compressed air as a rotation source, and the columnar portion 18a of the screw member 18 has an end portion 18b. A wrench head portion that is releasably received from the side, that is, the rotating body 76 is attached to the output shaft of the rotating mechanism. The engagement of the rotating body 76 with the screw member 18 and the release thereof allow the second moving body 72 to move.
It is carried out by moving vertically by 8.
The second moving body 72 and the moving mechanism 78 are surrounded by a cover 80.

As shown in FIG. 8, the rotary member 76 has a hole that opens downward so as to releasably receive the columnar portion 18a of the screw member 18 from the side of the pyramidal or truncated pyramidal end 18b. It has a recess 76a. The recess 76a is
The screw member 18 has a polygonal cross-sectional shape of substantially the same size as the columnar portion 18a.

In the illustrated example, the columnar portion 18 of the screw member 18
a, the pyramid-shaped or truncated pyramid-shaped end portion 18b, and the recess 76a of the rotating body 76 have hexagonal cross-sectional shapes corresponding to each other, but these cross-sectional shapes are square or pentagonal as long as they correspond to each other. Other polygonal cross-sectional shapes such as an octagon may be used.

The columnar portion 18a of the screw member 18 and the rotor 76
When the rotary member 76 is brought closer to the screw member 18 when fitting the recess 76a of the rotary member 76, the end portion 18b of the screw member 18 is first received in the recess 76a of the rotary member 76, and then the screw member 18 is inserted. The columnar portion 18b is the recess 7 of the rotor 76.
6a is accepted.

At this time, if the positions of the rotating body 76 and the screw member 18 around the rotating shaft line of the rotating body 76 and the axis line of the screw member 18 do not match, the open end of the recess 76a is a pyramid of the screw member 18. -Shaped or truncated pyramidal end 18b
, Which causes the screw member 18 to receive a pressing force.

However, when the rotating body 76 is not rotated, the pressing force causes relative angular rotation between the rotating body 76 and the screw member 18 around the rotating axis of the rotating body 76 and the axis of the screw member 18. As a result, the corners of the inner surface of the recess 76a of the rotating body 76 and the corners of the outer surface of the pyramidal or truncated pyramidal end 18b of the screw member 18 engage. On the other hand, when the rotating body 76 is rotated, the rotating body 76
Due to the rotation, the corner portion of the inner surface of the recess 16a of the rotating body 76 and the corner portion of the outer surface of the end portion 18b of the screw member 18 are engaged.

As a result, the positional relationship between the inner surface corner portion of the recess 76a and the outer surface corner portion of the end portion 18b around the rotation axis of the rotating body 76 and the axis of the screw member 18 is matched. By being pushed by the screw member 18, the recess 76 a of the rotating body 76 and the columnar portion 18 a of the screw member 18 are fitted together.

Therefore, even if the positions of the rotating body 76 and the screw member 18 around the rotating shaft line of the rotating body 76 and the axis line of the screw member 18 do not coincide with each other, the rotating body 76 and the screw member 18 are short in time. Securely engage with.

The first moving body 70 is manufactured in the shape of a box opened to the side of the mold 12 by a plurality of plate members connected to each other. The second moving body 72 is the first moving body 70.
A plurality of rods 82 extending from the above to the second moving body 72 and extending upward in parallel are prevented from moving in the front-rear direction and the left-right direction. The rod 82 has a cover 8 at the upper end.
0 is connected to the upper wall.

The moving mechanism 78 includes a jack such as a hydraulic or pneumatic cylinder mechanism, and is connected to the first and second moving bodies 70 and 72. The moving mechanism 78 lowers the corresponding second moving body 72 to a predetermined height position when the corresponding processing mechanism 42 is moved from the first position to the second position, and then moves the corresponding second moving body 72. The moving body 72 is raised to a predetermined height position.

The wrench 74 can be elastically displaced in the left-right direction with respect to the second moving body 72 by a connecting means or a connecting mechanism 84 that absorbs a relative positional deviation between the screw member 18 and the wrench 74 in the left-right direction. Is supported by the second moving body 72. The wrench 74 is also rotated and lowered when the corresponding processing mechanism 42 is moved from the first position to the second position, so that the wrench 74 engages with the columnar portion 18a of the screw member 18 and the screw member 18a. 18 is tightened or unfastened, and then the screw member 1 is lifted to raise the screw member 1.
Separated from 8.

As shown in FIGS. 6 and 7, the connecting mechanism 8
Reference numeral 4 denotes a first mounting member having a bifurcated portion composed of two plate-shaped portions spaced apart in the vertical direction, that is, a first connecting body 86.
And a second mounting member, that is, a second connecting body 88 received in the bifurcated portion of the second connecting body so as to be displaceable in the left-right direction. A hole 90 is formed in the upper plate-shaped portion of the first connecting body 86 so as to penetrate therethrough in the vertical direction. Hole 90
Is long in the left-right direction.

The second connecting body 88 includes the second connecting body 88.
A connecting pin 92 extending upward from is attached.
The connecting pin 92 is received in the hole 90, and is allowed to be elastically displaced in the left-right direction by the pair of elastic bodies 94 arranged in the hole 90.

As shown in FIG. 5, the first connecting body 86 is disposed on the second moving body 72, and the second connecting body 8 is also provided.
8 is attached to the wrench 74. However, the first and second connecting bodies 86, 88 may be arranged in the opposite manner. In either case, the wrench 74 is the second moving body 72.
On the other hand, it can be elastically displaced to the left and right. Connecting pin 9
The swinging motion of the wrench 74 about 2 is prevented by the side plate 96 provided on the side portion of the first coupling body 86.

The elastic body 94 is a compression coil spring in the illustrated example, but may be another elastic body such as rubber. When using rubber as the elastic body, rubber through which the connecting pin 92 penetrates may be arranged in the hole 90. The hole 90 may be circular.

The screw member 18 and the wrench 7 in the left-right direction
The position relative to 4 differs somewhat depending on the installation position of the fastening / loosening device 10 with respect to the moving path of the mold, the uneven placement of the screw member 18 on the mold 12, and the like. However, even if the relative positional relationship between the screw member 18 and the wrench 74 in the left-right direction is inaccurate, the connecting mechanism 84 does not connect the wrench 74 to the screw member 1.
The positive engagement with the screw 8 is performed in cooperation with the pyramidal or truncated pyramidal end 18b of the screw member 18.

For example, the screw member 18 in the left-right direction
Incorrect position of wrench 74 with respect to
4 contacts the end portion 18b of the screw member 18 while being moved toward the screw member 18. However, since the end portion 18b of the screw member 18 has a shape corresponding to the columnar portion 18a of the screw member 18 and the recess 76a of the rotating body 76, when the wrench 74 is further moved toward the screw member 18,
A displacement force in the left-right direction acts on the wrench 74, which causes the second connecting body 88 to move toward the elastic body 94 relative to the first connecting body 86.
The displacement between the screw member 18 and the wrench 74 is absorbed by the coupling mechanism 84, and the wrench 74 is securely engaged with the screw member 18 because the displacement is caused in the left-right direction against the force of.

The wrench 74 is maintained at a position displaced in the left-right direction with respect to the second moving body 72 while being engaged with the screw member 18, but when the wrench 74 is separated from the screw member 18, the connecting mechanism 84 is provided. Due to the force of the elastic body 84, the elastic body 84 is returned to the correct position with respect to the second moving body 72.

Referring to FIG. 5, the first connecting body 86 is
The second movable body 72 is formed by the pivot pin 98 extending in the front-rear direction.
Is rotatably connected to. First connection body 86
Is attached to the second moving body 72 so that the second connecting body 88 projects toward the mold 12 side. Wrench 74
As shown in FIG. 8, the rotating shaft 100 has a second connecting body 88.
To extend downward through a through hole formed in the second
It is attached to the connecting body 88 of.

Still referring to FIG. 5, the first connecting body 8
A pin 102 that penetrates the pin 6 in the front-rear direction is rotatably attached to the pin 6. Each end of the pin 102 has a guide hole 1 formed in the pair of guide plates 104 of the cover 80.
The roller portion (see FIG. 6) is movably received along the guide hole. The guide plate 104 is
They are attached to the upper surface of the moving body 70 at intervals in the front-rear direction, and extend upward in parallel while facing each other.

Each guide hole 106 has a first portion extending upward from below and a second portion gradually retreating from the upper end of the first portion to the side opposite to the mold 12. Therefore, while the pin 102 moves in the first portion of the guide hole 106, the second connecting body 88 has the rotation axes of the wrench 74 and the rotating body 76 in the vertical direction as shown in FIGS. 2 and 8. And the rotating body 76 is maintained at a position corresponding to the moving path of the screw member 18 in the left-right direction. But,
While the pin 102 moves through the second portion of the guide hole 106, the second connecting body 88 moves the rotating body 76 as shown in FIG.
Is tilted so as to retreat from the moving path of the screw member 18.

Referring to FIG. 8, the rotating body 76 is non-rotatably and movably supported by an auxiliary member 108 attached to the rotary shaft 100 of the wrench 74 so as to extend further downward from the rotary shaft. And is biased downward by a spring 110 disposed on the auxiliary member 108.

Referring to FIG. 9, each engagement mechanism 44 includes an engagement piece 112. The engaging piece 112 has a pin 114 extending in the vertical direction so that the engaging portion 112a can move in and out of the moving path of the mold, and the first moving body 70 of the processing mechanism 42 has an end portion opposite to the engaging portion 112a. It is installed. The engagement piece 112 is pivotally connected to one end of the link piece 116. The other end of the link piece 116 has a link piece 118.
Is flexibly connected to one end of the. Link piece 118
Is the first moving body 7 due to the pin 120 extending in the vertical direction.
0 for pivotal movement and drive mechanism 12
It is angularly rotated around the pin 120 by 2.

The drive mechanism 122 is a hydraulic or pneumatic cylinder mechanism in the illustrated example. The cylinder of this cylinder mechanism is connected to the first moving body 70, and the piston rod is connected to the link piece 118. When the drive mechanism 122 is extended, the link pieces 116 and 108 are extended, so that the engaging portion 112a of the engaging piece 112 extends.
Is projected into the moving path of the form. On the other hand, the drive mechanism 1
When 22 is contracted, the link pieces 116 and 118 are bent, so that the engaging portion 112a of the engaging piece 112 is retracted from the movement path of the form.

The engaging portion 112a of the engaging piece 112 engages with a predetermined portion of the mold in a state where the engaging portion 112a is projected into the moving path of the mold, whereby the engaging mechanism 46 follows the mold. As a result, the processing mechanism 42 also moves forward following the formwork. The portion where the engaging portion 112a engages is the mold 12
It is possible to use the protrusion provided on the screw member 18, the screw member 18 itself, the fastening device 20 shown in FIG. 4, and the like.

In the example shown in FIG. 9, the engaging portion 112a engages with the holding member 22 of the fastening device 20. However, the portion with which the engaging portion 112a engages may be any portion that has a fixed positional relationship with the screw member 18, and therefore the engaging portion 112a.
You may form the site | part which engages with a mold.

When the link pieces 116 and 108 are bent, the engaging portion 112a protrudes into the movement path of the mold, and when the link pieces 116 and 118 are extended, the engaging portion 112a.
May be retracted from the moving path of the form.

Each engaging mechanism 44 further includes a processing mechanism 42.
The first moving body 70 is provided with a pair of slide shafts 124 arranged so as to be capable of reciprocating in the front-rear direction. Both slide shafts 1
24 has its front end portions and rear end portions connected to each other by connecting members 126 and 128, respectively. Both slide shafts 124 are biased by a spring 130 so that most of them are projected forward from the first moving body 70.

The connecting member 128 pushes the link piece 118 backward when most of the slide shafts 124 are retracted into the first moving body 70.
8 is engaged with the link piece 118 so as to forcibly bend. Therefore, when most of the both slide shafts 124 are retracted into the first moving body 70, both the link pieces 116,
118 is pushed by the connecting member and bends, whereby the engaging portion 112a is forcibly retracted from the movement path of the mold.

1 to 3, the return mechanism 46 is guided by both guide rails 68 and is arranged on the second moving table 56 so as to be reciprocally movable in the front-rear direction.
32 and a drive mechanism 134 for forcibly moving the slider 132 in the front-back direction. The slider 132 is located in front of the processing mechanism 42 arranged in the forefront part and is arranged in the foremost part, and the connecting member 1 arranged therein.
26 (see FIG. 7).

The drive mechanism 134 includes a hydraulic or pneumatic cylinder mechanism. The slider 132 is the drive mechanism 13
4 is moved to the front by being extended, and the drive mechanism 1
When 34 is contracted, it is moved backward. The slider 132 has an abutment portion 136 that abuts the foremost processing mechanism 42 when it is moved rearward. Therefore, when the drive mechanism 134 is contracted, the drive mechanism 134 is moved rearward to move the frontmost processing mechanism 42 rearward, and as a result, the processing mechanism 42 comes into contact with the rearward processing mechanism 42 one after another, thereby The processing mechanism 42 is simultaneously moved backward.

Referring to FIG. 10, the braking mechanism 48 includes a drive mechanism 140, a rod-shaped pusher 142 vertically moved by the drive mechanism, and a brake pad 144 attached to the lower surface of the pusher. Prepare The drive mechanism 140 is an expansion / contraction mechanism using a hydraulic cylinder, a pneumatic cylinder mechanism, a solenoid mechanism, etc., and is attached to the upper wall portion 70a of the first moving body 70 so that the expansion / contraction direction is the vertical direction. The pusher 142 slidably penetrates the collar 146 attached to the lower wall portion 70b of the first moving body 70, and has the upper end portion thereof with the drive mechanism 1.
It is connected to 40 drive shafts.

The pusher 142 is normally displaced upward by the spring 138. However, the corresponding processing mechanism 4
2 is stopped, the brake pad 144 is pressed against the brake rail 150 attached to the first moving base 56 by being pushed down by the drive mechanism 140. The force of the spring 148 is applied to the pusher 142.
A ring 152 is attached to act on 42.

With reference to FIGS. 1 to 3, the tightening / loosening device 10
Further, when the frontmost processing mechanism 42 is moved to the second position, the plurality of shock absorbers 154 attached to the slider 132 of the returning mechanism 46 so that the frontmost processing mechanism 42 can abut on its front surface. And a plurality of shock absorbers 156 attached to the second moving table 56 so that the rearmost processing mechanism 42 can abut on its rear surface when the rearmost processing mechanism 42 is moved to the first position. Including. The shock absorber 156 is
It is attached to the second moving table 56 by a mounting plate 158.

The shock absorbers 154 and 156 are for reducing the impact and noise when the processing mechanism comes into contact. Therefore, the shock absorbers 154 and 156 may be provided in the processing mechanism 42. In addition, the second moving table 56 and the returning mechanism 4
Depending on the shape of 6, the shock absorber 154 may be provided on the second moving table 56, or the shock absorber 156 may be provided on the return mechanism 46. Further, a similar buffer is installed in the adjacent processing mechanism 4
When one of the two adjacent processing mechanisms 42 approaches, the other of the adjacent processing mechanisms 42 may come into contact with the other.

As shown in FIGS. 2, 4 and 6, the pneumatic motor of wrench 74 is rotated by pressurized air such as compressed air supplied from hose 160. Most of the compressed air discharged from the pneumatic motor is discharged into the atmosphere from an accessory 162 such as a silencer attached to the wrench 74.

However, a part of the air discharged from the pneumatic motor is supplied from the accessory device 76 to the thin pipe 164 extending from the side of the wrench 74 and the rotor 76 to the tip of the rotor 76. The pipe 164 is attached to a side portion of the wrench 74 so as to eject a part of the air discharged from the pneumatic motor from above into the moving path of the screw member 18.

Compressed air for a pneumatic motor generally contains a small amount of oil for the purpose of protecting the motor and the like.
This oil remains in the air discharged from the pneumatic motor. Therefore, when the screw member 18 moves below the lower end of the pipe 164 of the operating wrench 74, that is, below the nozzle portion 166, air containing oil is blown, whereby the oil is naturally sprayed.

As shown in FIGS. 1, 2, 3 and 4, the tightening / loosening device 10 further includes a wrench 74 and a screw member 1.
8 includes a plurality of displacement mechanisms 170 for forcibly displacing the wrench 74 in a direction away from the screw member 18 when the processing mechanism 42 is moved to a position near the second position while being engaged with 8.

The displacement mechanism 170 is provided for each processing mechanism 42. Each displacement mechanism 170 includes a long cam base 172 attached to the support base 40, a first cam member 174 attached to the cam base, and a second cam member 176 arranged in the processing mechanism 42. .

The cam base 172 is mounted on the second moving table 56, and the cover 8 of the processing mechanism 42 is attached.
With respect to 0, the lower side of the side opposite to the wrench 74 extends in the moving direction of the mold 12.

The first cam member 174 is a plate-shaped member having an inclined cam surface, and the left and right portions of the first cam member 174 correspond to the second position so that the cam surface is behind the moving direction of the mold 12. Spaced in the direction. The second position is different for each processing mechanism. Therefore, the first cam members 174 are sequentially arranged in the moving direction of the mold 12.

Each second cam member 176 is a roller-shaped cam follower member, and is rotatably supported by the corresponding second moving body 72 of the processing mechanism 42. A part of each second cam member 176 projects downward from the end portion. The position of each second cam member 176 in the left-right direction is the same as that of the corresponding first cam member 174.

When the wrench 74 of the processing mechanism 42 is raised to the position where it does not engage with the screw member, the second cam member 176 allows the first cam member 176 to move even if the processing mechanism 42 is advanced to the second position. The processing mechanism 42 has been advanced to a position near the second position when the processing mechanism 42 is raised to a position where it does not contact the member 174 and is lowered to a position where the wrench 74 of the processing mechanism 42 engages with the screw member 18. The first cam member 17
4 is lowered to a position where it comes into contact with the cam surface.

The displacement mechanism 170 allows the wrench 7 to move even though the processing mechanism 74 has been moved close to the second position.
When the fourth cam member 176 is engaged with the screw member 18, the second cam member 176 contacts the cam surface of the first cam member 174,
The cam member 176 of the processing mechanism 42 is pushed up by the cam surface of the first cam member 174 as the processing mechanism 42 advances, thereby forcibly raising the second moving body 72 of the processing mechanism 42, and thereby the wrench 74. Forcibly raise it,
The wrench 74 is forcibly separated from the screw member. Therefore, even if the moving mechanism 78 or the like breaks down, the wrench 74 is reliably displaced from the screw member 18 at a predetermined position, which is safe.

The first cam member 174 is attached to the cam base 170.
And the second cam member 176 is attached to the second moving body 72.
Alternatively, the first cam member 174 may be attached to the second moving body 72 and the second cam member 176 may be attached to the cam base 170, instead of being arranged at the same position. Also, a cam member having a shape other than the above may be used.

At the time of standby, each processing mechanism 42 has the first operation shown in FIG.
Of the slider 13 of the return mechanism 46.
2 has been moved to the frontmost position. In addition, the second moving body 72 and the wrench 74 of each processing mechanism 42 are raised, so that the second cam member 176 of the displacement mechanism 170 is moved.
Is also rising. In this state, the tightening / loosening device 10 is controlled by a control device (not shown).

When the first screw member 18 reaches a predetermined position along with the movement of the mold 12, first, the drive mechanism 122 of the engagement mechanism 44 corresponding to the frontmost processing mechanism 42 is driven. As a result, the engaging portion 112a of the engaging piece 112 of the engaging mechanism 44 is projected into the moving path of the mold 12 and engages with a predetermined portion of the mold 12, so that the frontmost processing mechanism 42 is While being positioned with respect to the screw member 18 by the engaging mechanism 44, the mold 12 is advanced following the movement of the mold 12.

During this time, when the second screw member 18 reaches the predetermined position, the drive mechanism 122 of the engagement mechanism 44 corresponding to the second processing mechanism 42 is driven, and the second processing mechanism 42 performs the first processing. Like the mechanism 42, the mold 12 is moved forward following the movement of the form 12. Hereinafter, every time the screw member 18 reaches a predetermined position, the processing mechanism 42 is advanced following the movement of the mold 12.

The arrival of the screw member 18 at a predetermined position can be detected by, for example, a sensor provided for each processing mechanism 42. A reed switch, a proximity switch, an optical sensor, or the like can be used as the sensor. It is preferable that the height position of the sensed portion of the mold 12 sensed by the sensor has a different value for each processing mechanism 42.

While each processing mechanism 42 moves from the first position to the second position, the second moving body 72 is lowered by the moving mechanism 78 while rotating the rotating body 76 by the wrench 74. After the screw member 18 is tightened or released, the rotation of the rotating body 76 is stopped and the second moving body 72 is lifted, whereby the second moving body 72 is moved.
And the work of returning the rotating body 76 to the initial position is executed.

When each processing mechanism 42 reaches the vicinity of the second position, the engaging portion 112a of the engaging mechanism 44 is retracted from the moving path of the mold, and then the driving mechanism 140 of the braking mechanism 48 is driven. By doing so, it is stopped at the second position. Therefore, the stop of each processing mechanism 42 becomes smooth. Engagement part 1
The drive mechanism 122 retracts 12a from the moving path of the form. However, even if the engaging portion 112a is not retracted from the movement path of the mold, the engaging portion 112a is retracted by the contact portion 136 of the slider 132 or the previous processing mechanism 42. , Is reliably retracted from the moving path of the formwork 12.

When the processing mechanism 74 is advanced, the wrench 7
4 is typically separated from the screw member 18 by the moving mechanism 78 by the time the processing mechanism 42 reaches near the second position. However, if the wrench 74 is engaged with the threaded member 18 even though the processing mechanism 74 has been moved closer to the second position, the wrench 74 will move to the first position of the displacement mechanism 170.
And, due to the joint action of the second cam members 174 and 176, they are forcibly lifted and forcibly released from the engagement with the screw member.

When all the processing mechanisms 42 are moved to the second position, the driving mechanism 134 of the returning mechanism 46 is contracted so that all the processing mechanisms 42 are collectively returned to the first position. Each processing mechanism 42 is smoothly stopped by the braking mechanism 48 even when returned to the first position.

The above steps are repeated until all the screw members 18 have been tightened or released.

The wrench 74 may be a wrench having a rotating mechanism such as an electric motor or a hydraulic motor. When the rotator 76 of the processing mechanism 42 is rotated by a wrench 74 having a rotation mechanism such as a pneumatic motor like the fastening device 10, when a wrench that generates a rotational force by impact such as an impact wrench is used. Compared to, less shock, vibration and noise. However, it is also possible to use a wrench such as an impact wrench that generates a rotational force by an impact.

Instead of engaging the wrench 74 with the bolt-shaped screw member 18, for example, the fastening device 1 shown in FIG.
As in 80, the wrench 74 may be engaged with the nut-shaped screw member 184 screwed to the bolt-shaped screw member 182.

The screw member 182 has its threaded rod portion passed through the flanges 16a and 16b from below, and the head portion thereof is the holding member 2
2 and is maintained in that condition by the stopper 26.

The nut-shaped screw member 184 includes a polygonal (hexagonal in the illustrated example) columnar portion 184a, an end 184b coaxially and integrally continuing to one side of the columnar portion, and a screw member. 182 has a screw hole 184c screwed into the male screw portion. The end portion 184b is a pyramid portion or a truncated pyramid portion having a polygonal pyramid shape or a truncated pyramid shape corresponding to the columnar portion 184a, and becomes smaller with increasing distance from the columnar portion 184a. The screw hole 184a is, in the illustrated example,
Although the columnar portion 184a and the end portion 184b are formed so as to penetrate in the axial direction thereof, it may be formed at least in the columnar portion 184a.

Instead of forming the pyramidal or truncated pyramidal end 18a or 184b on the screw member 18 or 184, a polygonal shape corresponding to the columnar portion of the screw member is formed as in the rotating body 186 shown in FIG. A recess having a first portion 186a and a second portion 168b having a polygonal pyramid shape and corresponding to the first portion and corresponding to the first portion may be formed in the rotary body of the wrench. In this case, the head portion of the bolt-shaped screw member 188 (or the nut-shaped screw member screwed to this) is received in the recess.

The present invention can be applied to any of a device for exclusive use of tightening, a device for exclusive use of releasing tightening, and a device for both tightening and releasing thereof. The rotation direction of the rotating body 76 differs depending on whether the tightening device 10 is for tightening or unfastening, and also depending on whether the screw member 18 is a right-hand screw or a left-hand screw.

If the tightening / loosening device 10 that reciprocally moves a plurality of processing mechanisms 42 to tighten or release the screw members 18 as in the above-described coupling device is used, a large installation space is not required, and the processing mechanism 42 is used. There is no fear of twisting the power lead wire or the compressed air hose for motive power, and the device is small and simple.

However, according to the present invention, not only the tightening / releasing device for reciprocating the processing mechanism but also the processing mechanism in the closed loop like the known tightening / loosening device described in Japanese Patent Publication No. 59-49169. It can also be applied to a coupling device using a circulatory loosening device. Further, the present invention is also applicable to a fastening device having a single processing mechanism, and a coupling device using a fastening device that moves the wrench laterally or diagonally when engaging the wrench and the screw member. You can Further, the wrench may be a manually operated wrench.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a fastening device used in a coupling device of the present invention.

2 is a cross-sectional view taken along line 2-2 of FIG. 1 and is a cross-sectional view in which some members of the processing mechanism are omitted.

3 is a plan view of the tightening / loosening device shown in FIG. 1. FIG.

FIG. 4 is a diagram showing an example of a fastening device used in the coupling device of the present invention, in which (A) is a sectional view and (B) is a plan view.

FIG. 5 is a front view showing an embodiment of a processing mechanism.

FIG. 6 is a perspective view showing an embodiment of a wrench and a connecting mechanism.

FIG. 7 is a plan view of the wrench and the connection mechanism shown in FIG.

FIG. 8 is a sectional view showing an example of a rotating body.

FIG. 9 is a diagram showing an example of an engagement mechanism.

FIG. 10 is a cross-sectional view showing an example of a braking mechanism.

FIG. 11 is a view showing another embodiment of the fastening device used in the coupling device of the present invention, (A) is a sectional view, and (B) is a sectional view.
Is a plan view.

FIG. 12 is a cross-sectional view showing another embodiment of the rotating body of the wrench.

[Explanation of reference numerals] 10 fastening / loosening device 12 formwork 20 fastening device 40 support base 42 processing mechanism 44 engagement mechanism 46 returning mechanism 48 braking mechanism 70 first moving body 72 second moving body 74 wrench 76,186 rotating body 78 moving mechanism for processing mechanism 84 coupling mechanism (coupling means) 18 screw member 18a columnar portion 18b end portion 18c male screw portion 184 screw member 184a columnar portion 184b end portion 184c screw hole 186 rotating body (wrench head portion) 186a recess First part 186b Second part of recess

Claims (8)

[Claims] 1. A screw member, wherein the screw member has a polygonal columnar portion and a polygonal pyramid-shaped or truncated pyramid-shaped end corresponding to the columnar portion and is integrally formed with the columnar portion. And an end portion that is smaller than the columnar portion and is smaller than the columnar portion. 2. The coupling device according to claim 1, wherein the screw member is arranged in a form frame formed in a tubular shape by coupling a pair of half-divided bodies in a state of abutting each other. 3. The screw member further includes a rod-shaped portion having a male screw at least at one end, and the rod-shaped portion integrally continuing to the side opposite to the end of the columnar portion at the other end. Item 3. The coupling device according to Item 1 or 2. 4. The coupling device according to claim 1, wherein the screw member has a screw hole in at least the columnar portion. 5. A wrench for releasably engaging the columnar portion of the screw member to rotate the screw member around its axis, the wrench including the columnar portion on the side of the end portion. The coupling device according to any one of claims 1 to 4, further comprising a polygonal cylindrical recess corresponding to the columnar portion, the recess being received from the coupling unit. 6. The machine further includes a tightening machine for tightening or loosening the screw member, wherein the tightening machine has a support base and a columnar portion of the screw member in a polygonal cylindrical recess corresponding to the columnar portion. At least one processing mechanism comprising a wrench that receives from the end side and rotates the screw member around its axis, from a first position behind the moving direction of the formwork in which the screw member is arranged. At least one processing mechanism that is moved to a second position ahead of the moving direction of the mold following the movement of the mold, and until the processing mechanism moves from the first position to the second position. The wrench is moved away from the screw member to move the wrench toward the screw member to engage the wrench with the columnar member and to disengage the wrench from the screw member. Moved in the direction The processing mechanism further includes a moving mechanism configured to move the first moving body on the support base so as to be movable in the moving direction of the mold, and the first moving body can move up and down. A second moving body disposed in the second moving body and a connecting means for supporting the wrench on the second moving body so as to be elastically displaceable in a horizontal direction transverse to a moving direction of the mold. 4. The coupling device according to claim 4. 7. A wrench for engaging a screw member having a polygonal column to rotate the screw member about its axis, the wrench comprising a recess for receiving the column of the screw member. The recess has a polygonal first portion corresponding to the columnar portion of the screw member, and a polygonal truncated pyramid second portion that is continuous with the first portion and corresponds to the first portion.
And a second portion that gradually increases from the side of the first portion toward the open end of the recess. 8. A tightening / loosening machine for tightening or loosening a screw member having a polygonal columnar portion, wherein the tightening / loosening machine receives a support base and a columnar portion of the screw member in a recess to secure the screw member. At least one processing mechanism including a wrench that rotates about its axis, from a first position in the moving direction rear of the mold in which the screw member is arranged to a second position in the moving direction front of the mold. At least one processing mechanism that is moved following the movement of the mold, and before the processing mechanism moves from the first position to the second position,
The wrench is moved away from the screw member to move the wrench toward the screw member to engage the wrench with the post of the screw member and to disengage the wrench from the screw member. A moving mechanism for moving the first moving body in a moving direction of the mold, and the processing mechanism further includes a moving mechanism for moving the first moving body in a vertical direction. A second moving body disposed movably to the second moving body, and a connecting means for supporting the wrench on the second moving body so as to be elastically displaceable in a horizontal direction across the moving direction of the mold. The recess of the wrench has a polygonal first portion corresponding to the columnar portion of the screw member, and a polygonal truncated pyramid-shaped second portion that follows the first portion and corresponds to the first portion. And the concave portion from the side of the first portion. And a second portion gradually increases toward the open end, the coupling device.