JPH07186127A - Device for fastening and loosening form clamping screw member - Google Patents

Abstract

PURPOSE:To bring a wrench into engagement with a screw member even when the relative positional relation between the screw member and the wrench in the horizontal direction crossing the moving direction of a form is inaccurate. CONSTITUTION:A treatment mechanism 42 is equipped with the wrench 74 engaged with a screw member 18 in a disengageable manner to rotate the screw member around its axial line, the first moving member 70 arranged on a support stand 40 in a reciprocally movable manner, the second member arranged to the first moving member in an up and down movable manner and a connection means supporting the wrench on the second moving member so as to make the same elastically displaceable in the horizontal direction traversing the moving direction of a form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for tightening or loosening a screw member used for tightening a mold for molding a secondary concrete product.

[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 so-called tightening / releasing devices used for fastening or releasing this type of mold, that is, for fastening or releasing a screw member is described in the above publication. This known fastening / loosening device moves a plurality of fastening / loosening mechanisms, that is, processing mechanisms together with the molds while continuously moving the molds on which the screw members are arranged in one direction. Rotate the screw member. The processing mechanism is advanced one after another along with the movement of the formwork, and after tightening or releasing it,
It is returned to the initial position. 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 threaded member of the form and engaged with the threaded member while the corresponding processing mechanism is moved together with the form, and then tightens or releases the screwed 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 fastening / loosening device, if the relative positional relationship between the screw member and the wrench, especially in the horizontal direction orthogonal to the moving direction of the mold, is incorrect, the wrench becomes a screw member. They do not engage and therefore the screw members cannot be tightened and loosened.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to engage a wrench with a screw member even if the relative positional relationship between the screw member and the wrench in the horizontal direction intersecting the moving direction of the mold is incorrect. To do so.

[0007]

SOLUTION: The fastening device of the present invention comprises at least one supporting base and a wrench releasably engaged with a screw member of a mold to rotate the screw member around its axis. At least one processing mechanism that is a processing mechanism and is moved from a first position rearward in the moving direction of the mold to a second position forward in the moving direction of the mold, following the movement of the mold. While the processing mechanism moves from the first position to the second position, the wrench is moved toward the screw member to engage the wrench with the screw member, and the wrench and the A moving mechanism for moving the wrench in a direction away from the screw member to disengage the screw member.

The processing mechanism further includes a first moving body arranged on the support table so as to be movable in the moving direction of the mold.
A second movable member arranged in the first movable body so as to be vertically movable.
And a connecting means for supporting the wrench on the second moving body so as to be elastically displaceable in the horizontal direction across the moving direction of the mold.

The processing mechanism is advanced from the first position to the second position following the movement of the mold. Meanwhile, the wrench is moved toward the screw member arranged on the form by the moving mechanism to engage with the screw member, and then the screw member is rotated to tighten or release the screw member, and then move. The mechanism moves in a direction away from the screw member to release the engagement with the screw member.

If the position of the wrench with respect to the screw member in the horizontal direction intersecting the moving direction of the mold is incorrect, the wrench comes into contact with the screw member during the movement of the wrench toward the screw member. However, when the wrench is further moved toward the screw member, a displacement force in the horizontal direction that intersects the moving direction of the form acts on the wrench, and this displacement force is absorbed by the connecting means, so that the wrench is screwed. Engage the member.

Therefore, according to the present invention, the wrench engages with the screw member even if the relative positional relationship between the screw member and the wrench in the horizontal direction intersecting the moving direction of the mold is incorrect. .

The connecting means is a first connecting body arranged on one of the second moving body and the wrench and having a hole penetrating in the vertical direction, and the second connecting body.
A second connecting body disposed on the other side of the moving body and the wrench, the second connecting body being received by the first connecting body so as to be displaceable in a horizontal direction across the moving direction of the mold. A connecting pin attached to the second connecting body, the connecting pin being received in the hole, and the connecting pin being elastically displaced in a horizontal direction across the moving direction of the mold with respect to the hole. And an elastic body that allows

Further, an engaging mechanism disposed in the processing mechanism, which is releasably engaged with the mold and receives a moving force from the mold while being engaged with the mold to perform the processing. It is preferable to include an engagement mechanism for advancing the mechanism by following the movement of the mold. With this configuration, the engagement mechanism is moved together with the mold to move the processing mechanism while being engaged with the portion related to the screw member. Also, the wrench
While the processing mechanism is advanced following the movement of the mold, the engagement mechanism positions the screw member and rotates the screw member in that state.

The wrench is a rotating mechanism and a rotating body releasably engaged with the screw member. The wrench is supported by the rotating mechanism and rotated by the rotating mechanism to move the screw member around its axis. It is preferable to provide a rotating body for rotating and a spring for exerting a force for displacing the rotating body downward on the rotating body. As a result, even if the vertical movement amount of the wrench by the movement mechanism and the vertical movement amount of the screw member due to the screwing do not match, the difference between the two movement amounts can be reduced by the spring. As a result, the engagement state between the wrench and the screw member is prevented from being disengaged as the screwed state of the screw member changes.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS.
It is used as a device for tightening or releasing a plurality of screw members arranged on the flange on one side of the mold 12.

The formwork 12 has a semicircular cross-sectional shape, and has a pair of half halves 14a, 14 each having a flange extending in the longitudinal direction of the formwork at 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.

The form 12 is, for example, Japanese Patent Publication No. 59-4916.
As in the formwork described in FIG. 9 of Japanese Patent Publication No. 9 publication, a formwork in which both halves have a flange only on one side edge part and are connected at the other side edge part by a hinge or the like. In some cases, one clamping device may be located near the path of movement of the formwork 12.

However, the form 12 is, for example, Japanese Patent Publication Sho 59.
When each half has a flange on each of the side edges and is fastened by a screw member at each flange, as in the formwork described in FIG. It is preferable to dispose the fastening devices opposite to each other with respect to the moving path of the mold 12 and perform the fastening operation of the screw members by the fastening devices or the releasing operation thereof in parallel.

As shown in a partially enlarged view of FIG. 4, the formwork 12 has two halves 14a and 14b with flanges 16a,
It is formed into a cylindrical shape by fastening with a screw member 18 at each of a plurality of 16b, 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
Reference numeral 8 denotes a bolt of a known fastening device 20 described in Japanese Utility Model Laid-Open No. 3-87206, and the flange 16
a and 16b are fixed to the corresponding half halves 14a and 14b, respectively. However, the screw member 18 may be another member such as a nut. The head of the screw member 18 has a hexagonal columnar shape, and the upper end of the head has a truncated cone shape.

Referring to FIG. 4, the fastening device 20 includes a holding member 22 fixed to the lower surface of the lower flange 16a coaxially with a hole formed in the lower flange 16a, and a holding member 2.
2, a nut 24 that is non-rotatably arranged and screwed with the screw member 18, a stopper 26 that is arranged in the holding member 22 to prevent the nut 24 from falling off the holding member 22, and an upper flange 16b. Is fixed to the upper surface of the upper flange 16b coaxially with the hole formed in the
8, a cylindrical holding member 28 for receiving 8 and a screw member 18
Retaining ring 30 arranged in the holding member so as to prevent the spring from falling off from the holding member 28, and an annular spring bearing 32 arranged between the head of the screw member 18 and the holding member 28.
And a spring 34 disposed between the holding member 28 and the spring receiver 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 mold 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 is
It can be adjusted by a plurality of jacks 60 using a hydraulic or pneumatic cylinder mechanism or the like.
The height position of the processing mechanism 42 with respect to 2 can be adjusted. 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 moving table 56 is slidably engaged with a plurality of rails 64 provided on the upper surface of the first moving table 54 so as to extend in the left-right direction, whereby the up-down direction and the front-rear direction. Is prevented from moving to. 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, or a hydraulic motor.

The second moving table 56 is provided with 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, the first moving 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 having a rotating mechanism whose rotation source is a pneumatic motor driven by compressed air under pressure, and a rotation for releasably receiving a part of the screw member 18. The body 76 is attached to the output shaft of the rotating mechanism. Rotating body 76 for screw member 18
The engagement and disengagement of is performed by moving the second moving body 72 in the vertical direction by the moving mechanism 78. The second moving body 72 and the moving mechanism 78 include the cover 8
Surrounded by 0s. The rotating body 76 is the screw member 18
Has a hexagonal hole about the same size as the head of the screw member 18 for releasably receiving the head.

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 joined 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 also rotates and is lowered when the corresponding processing mechanism 42 is moved from the first position to the second position, thereby engaging the screw member 18 and tightening or tightening the screw member 18. After that, it is lifted and separated from the screw member 18.

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 member 94 is a compression coil spring in the illustrated example, but may be another elastic member such as rubber. When the rubber is used as the elastic body, the rubber through which the connecting pin 92 penetrates may be arranged in the hole 90. Hole 9
0 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.
8 has a function of reliably engaging with 8.

For example, the screw member 18 in the left-right direction
Incorrect position of wrench 74 with respect to
4 contacts the head of the screw member 18 while being moved toward the screw member 18. However, since the upper end of the head of the screw member is frustoconical, 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 Two connected bodies 88
Is displaced in the left-right direction against the force of the elastic body 94 with respect to the first connecting body 86, the positional deviation between the screw member 18 and the wrench 74 is absorbed by the connecting mechanism 84, and the wrench 74 is attached to the screw member 18. Engage securely.

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 has a hexagonal tubular shape so as to non-rotatably receive the head portion of the screw member 18. The rotating body 76 is the rotating shaft 100 of the wrench 74.
Is rotatably and vertically movably supported by an auxiliary member 108 attached to the auxiliary shaft 108 so as to extend further downward from the rotary shaft.
It is biased downward by 0.

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 projects 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 projects into the moving path of the mold, and when the link pieces 116 and 118 are extended, the engaging portion 112a is formed.
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.

Further, referring to FIGS. 1 to 3, the return mechanism 46 is guided by both guide rails 68 and is arranged on the second moving base 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.

Referring 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 shock 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 the side portions of the wrench 74 and the rotating body 76 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 42 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 first cam member 174 is provided on the left and right of the portion corresponding to the second position so that the cam surface is located in front of 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 member, and the corresponding second moving body 7 of the processing mechanism 42 is provided.
2 is rotatably supported. Each second cam member 17
A part of 6 projects downward from the end. 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.

The second cam member 176 allows the first cam member 176 to move even when the processing mechanism 42 is advanced to the second position when the wrench 74 of the processing mechanism 42 is raised to a position where it does not engage the screw member. 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.
Instead of disposing the first cam member 174 on the second moving body 72, the first cam member 174 may be attached to the cam base 170 and the second cam member 176 may be attached to the cam base 170. 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 structure 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.

Each processing mechanism 42 moves the second moving body 72 by the moving mechanism 78 while rotating the rotating body 76 by the wrench 74 while moving from the first position to the second position. 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.

As described above, when the rotating body 76 of the wrench 74 engages with the screw member 18, the relative positional displacement between the screw member 18 and the wrench 74 in the left-right direction is absorbed by the connecting mechanism 84, and the wrench 74 is absorbed. 74 securely engages the screw member 18. Further, the screw member 18 is the wrench 7 in operation.
When moving below the nozzle portion 166 of the fourth pipe 164, a part of the air discharged from the pneumatic motor is blown, so that the oil contained in the air is scattered.

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 form, 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 are tightened or released.

According to the tightening / loosening device 10, the plurality of processing mechanisms 42 can be reciprocally moved to stop or tighten the screw member 18 without stopping the mold 12, resulting in a large installation space. Unnecessary, processing mechanism 4
The power lead wire for the power of No. 2 or the hose for compressed air is not likely to be twisted, and the device is small and simple.
Further, since the processing mechanism 42 is moved forward while being positioned with respect to the screw member 18 by the engagement mechanism 44 engaging with the mold 12, the moving state of the processing mechanism 42 depends on the arrangement pitch of the screw member 18, It changes following changes in the moving speed of the mold 12, and therefore can be commonly used for various molds having different arrangement pitches of screw members, moving speed of the mold, and the like.

While the tightening device 10 is operating, the pressure of the compressed air supplied to each wrench 74 is detected, the abnormality of the pneumatic motor is detected from the pressure difference of the change, and the screw member or the wrench is operated. It is preferable to inform each wrench of the abnormality by an indicator, a buzzer or the like.

The abnormality of the screw member or the wrench means, for example, when the tightening device is applied to the tightening device, when the tightening of the screw member to the predetermined state is completed, the pressure of the air supplied to the pneumatic motor is increased. Because it rises to a predetermined value,
This can be detected by the fact that the predetermined pressure rise does not occur despite the tightening work for the predetermined time.

When the tightening / releasing device is applied to the tightening release device, when the tightening release is completed,
Since the pressure of the air supplied to the pneumatic motor drops to a predetermined value, it can be detected that the predetermined pressure drop does not occur even after the tightening operation has been performed for a predetermined time.

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, the present invention may use a wrench such as an impact wrench that generates a rotational force by an impact.

Engagement between the head of the screw member 18 and the rotating body 76 of the wrench 74 is ensured, and the screw member 1 in the left-right direction is formed.
In order to allow the coupling mechanism 84 to absorb the relative positional deviation between the head portion 8 and the rotary body 76 of the wrench 74, the upper end portion of the head portion of the screw member 18 is truncated cone-shaped as in the illustrated embodiment. In addition to the above, the upper end of the head of the screw member 18 may have another shape such as a truncated hexagonal pyramid, a hexagonal pyramid, a cone, a hemisphere, or a screw of the rotating body 76 of the wrench 74. The member receiving portion may have a truncated hexagonal pyramid shape, a truncated cone shape, a hemispherical shape, or the like.

Further, the rotating body 76 of the wrench 74 may be engaged with a nut screwed with the bolt instead of engaging with the head of the bolt. The shape of the engaging portion between the rotating body of the wrench and the screw member can be any other shape such as a quadrangle or an octagon, regardless of whether the screw member is a bolt or a nut. Further, instead of receiving the screw member in the wrench, the wrench may be inserted into a recess formed in the screw member.

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.

The present invention is not limited to an apparatus for reciprocating the processing mechanism, but also an apparatus for circulating the processing mechanism in a closed loop like a known apparatus described in Japanese Patent Publication No. 59-49169. Can also be applied. Furthermore, it can be applied not only to an apparatus having a plurality of processing mechanisms but also to an apparatus having a single processing mechanism.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of a fastening / loosening 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 cross-sectional view showing an example of an apparatus for fastening the formwork.

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.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tightening / loosening device 12 Formwork 18 Screw member 20 Fastening device 40 Support base 42 Processing mechanism 44 Engaging mechanism 46 Returning mechanism 48 Braking mechanism 60,66 Drive mechanism for moving base 70 First moving body 72 Second moving body 74 Wrench 76 Rotating Body 78 Moving Mechanism for Processing Mechanism 84 Coupling Mechanism (Coupling Means) 86, 88 First and Second Coupling Body 90 Hole 92 Coupling Pin 94 Elastic Body

Claims (4)

[Claims] 1. A device for tightening or loosening a screw member arranged on a formwork, comprising at least a support base and a wrench releasably engaging the screw member for rotating the screw member about its axis. At least one processing mechanism which is one processing mechanism and is moved from a first position rearward in the moving direction of the mold to a second position forward in the moving direction of the mold following the movement of the mold. And moving the wrench toward the screw member so as to engage the wrench with the wrench before the processing mechanism moves from the first position to the second position. And a moving mechanism for moving the wrench in a direction in which the wrench is separated from the screw member so as to disengage the screw member, the processing mechanism further includes the moving mechanism in the moving direction of the mold on the support base. A first movable body arranged to be movable, a second movable body arranged to be movable in the vertical direction on the first movable body, and elastically in a horizontal direction across the moving direction of the mold. A fastening device for fastening a screw member for mold form fastening, which comprises a connecting means for displaceably supporting the wrench on the second moving body. 2. The connecting means is a first connecting body arranged on one of the second moving body and the wrench, the first connecting body having a hole penetrating in a vertical direction, and the first connecting body. A second connecting body arranged on the other side of the second moving body and the wrench, the second connecting body being received by the first connecting body such that the second connecting body is displaceable in a horizontal direction across the moving direction of the mold. A connecting pin attached to the second connecting body, the connecting pin being received in the hole, and the connecting pin elastically displaced in the horizontal direction across the moving direction of the mold with respect to the hole. The fastening device according to claim 1, further comprising: 3. An engaging mechanism arranged in the processing mechanism, which is releasably engaged with the mold and receives a moving force from the mold while being engaged with the mold. The tightening / loosening device according to claim 1 or 2, further comprising an engagement mechanism that advances the processing mechanism while following the movement of the mold. 4. The wrench is a rotating mechanism and a rotating body releasably engaged with the screw member. The wrench is supported by the rotating mechanism and is rotated by the rotating mechanism so that the screw member has an axial line. The tightening device according to claim 1, 2 or 3, further comprising: a rotating body that rotates around and a spring that applies a force that displaces the rotating body downward to the rotating body.