JPH071431A - Apparatus for clamping-loosening screw member for clamping form - Google Patents

Abstract

PURPOSE:To eliminate the need for a large installation space and to prevent a power lead for a treatment mechanism or a compressed air hose from twisting by enabling more than one treatment mechanism which clamps or loosens the screw member of a form transferred continuously in one direction to reciprocate in the moving direction of the form. CONSTITUTION:In a form 12 for centrifugal molding of concrete, flanges of a pair of half molds 14a, 14b are clamped by more than one screw member. In an apparatus 10 for clamping-loosening the screw members, more than one treatment mechanism 42 which rotates the screw member is arranged on a support base 40 which is installed along the moving route of the form 12 to be able to move between the first and second positions in the moving direction of the form 12. Each treatment mechanism 42 is equipped with an engagement mechanism 44. When the treatment mechanism 42 is at the first position, the engagement mechanism 44 is engaged with the form 12 to be able to be released and rotates the screw member while the treatment mechanism 42 moves with the form 12 to the second position. When all the treatment mechanisms 42 advance to the second position, a return mechanism returns all the treatment mechanisms to the first position.

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 a mold while continuously moving a mold in which a screw member is arranged in one direction, and in the meantime, a screw member is provided by each processing mechanism. To rotate. The processing mechanism is advanced one after another along with the movement of the mold, and is returned to the initial position via a movement path different from the movement path at the time of advance after tightening or releasing the tightening. 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.

According to the known fastening / loosening device, when used as a fastening device for a screw member, the screw member can be securely screwed to firmly fasten the form, and also used as a device for releasing the fastening of the screw member. In addition, it is possible to reliably remove the screw member that is firmly screwed, and it is not necessary to stop the formwork even if it is used as any device.

However, in the known fastening device, since the processing mechanism is moved along the annular or loop path,
Large installation space is required, measures must be taken to prevent twisting of the power leads or compressed air hoses for the power source of the processing mechanism, the equipment is large,
It's complicated.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the need for a large installation space, to prevent twisting of a power lead wire for powering a processing mechanism or a compressed air hose, and to make the apparatus small and simple. Especially.

[0007]

SOLUTION: SOLUTION MECHANISM, OPERATION, AND EFFECT The tightening / loosening device of the present invention comprises a support base that defines a guide portion extending in the moving direction of the mold, and a plurality of processing mechanisms that rotate the screw member around its axis. A plurality of treatments reciprocally and sequentially arranged on the support base along the guide portion to a first position behind the moving direction of the mold and a second position ahead of the moving direction of the mold. Mechanism and an engaging mechanism arranged in each processing mechanism, which is releasably engaged with the mold and receives a moving force from the mold while being engaged with the mold, and a corresponding processing mechanism An engaging mechanism for advancing to the second position by following the mold.
And a return mechanism that simultaneously retracts the advanced processing mechanism to return it to the first position.

The engaging mechanism includes a screw member itself, a member for maintaining the screw member in the mold, a fastening device for fastening the mold, and a stopper, when the corresponding processing mechanism stands by at the first position. It engages with a portion related to the screw member, such as an engaged portion, and is moved together with the mold in that state to move the corresponding processing mechanism. Accordingly, the processing mechanism is advanced one after another in accordance with the movement of the mold, and while the positioning mechanism is positioned with respect to the screw member by the engagement mechanism, the screw member is rotated to tighten or tighten the screw member. To cancel it.

The engaging mechanism moves away from the formwork when the corresponding processing mechanism is advanced to the second position, whereby the movement of the corresponding processing mechanism is stopped. All processing mechanisms are second
When the processing mechanism is advanced to the position, all the processing mechanisms are collectively returned to the first position by the returning mechanism through the same guide portion as when the processing is performed.

As described above, according to the present invention, it is possible to reciprocally move a plurality of processing mechanisms to tighten or release the screw members without stopping the mold, resulting in a large installation space. It is unnecessary, and there is no fear that the lead wire for electric power for the power of the processing mechanism or the hose for compressed air is twisted, and the apparatus is small and simple.

According to the present invention, since the processing mechanism is advanced in a state in which the processing mechanism is positioned with respect to the screw member by engaging the engaging mechanism with the mold, the moving state of the processing mechanism is the same as that of the screw member. It changes following the changes in the arrangement pitch, the moving speed of the mold, etc., and therefore can be commonly used for various forms having different arrangement pitches of the screw members, moving speed of the mold, etc.

Further, it is preferable to include a braking mechanism which is disposed in each processing mechanism and which comes into contact with the support base to apply a braking force to the corresponding processing mechanism. As a result, the processing mechanism can be smoothly stopped.

The engaging mechanism is an engaging piece arranged in the corresponding processing mechanism so as to be able to move in and out of the moving path of the mold, and a pair of link pieces bendably connected to each other. Is connected to the engaging piece, and the other link piece is a pair of link pieces pivotally supported by the corresponding processing mechanism, and the engaging piece is engageable with the mold. It is preferable to include a drive mechanism for selectively maintaining both the link pieces in the extended state and the bent state in order to selectively displace between the position and the non-engageable position. As a result, the engagement piece can be reliably moved in and out of the movement path of the mold.

Each of the engaging mechanisms further includes a slide shaft disposed in the corresponding processing mechanism so as to be capable of reciprocating in the moving direction of the mold, and a part of the slide shaft is provided from the corresponding processing mechanism. It is preferable to include a spring for exerting a force for maintaining a state of protruding forward on the slide shaft.
The slide shaft abuts either the return mechanism and the other processing mechanism located in front of the corresponding processing mechanism to displace the engagement piece to a position where it cannot engage the formwork. To displace. This causes the slide shaft to return to the return mechanism or another processing mechanism both when the corresponding processing mechanism is advanced to the second position and when the corresponding processing mechanism is returned to the first position. Is pressed to displace the link pieces in order to displace the engaging piece to a position where it does not engage the mold, thereby preventing the engaging piece from unnecessarily engaging the mold.

Further, when one of the frontmost processing mechanism and the returning mechanism is moved to the front end portion of the guide portion, the frontmost processing mechanism and the returning mechanism are connected to each other. It is preferable to include a shock absorber arranged so as to be able to contact the other. However, the shock absorber may be arranged on the support base. In either case, the impact and noise are reduced as compared with the case where the frontmost processing mechanism directly contacts the return mechanism or the support base.

Further, when one of the rearmost processing mechanism and the support base is moved to the rear end portion of the guide portion, the rearmost processing mechanism and the support base are provided. It is preferable to include a shock absorber arranged so as to be able to abut on the other side. However, the shock absorber may be arranged in the return mechanism. In either case, the impact and noise are reduced as compared with the case where the rearmost processing mechanism directly contacts the support base or the returning mechanism.

The return mechanism is arranged on the support base so as to be capable of reciprocating in the moving direction of the mold, and has a slider which can come into contact with the frontmost processing mechanism and the second frontmost processing mechanism.
And a drive mechanism for moving the slider to return the slider to the first position. Thus, by moving the frontmost processing mechanism to the first position, all the processing mechanisms can be returned to the first position at the same time.

Each processing mechanism has a frame arranged on the support base so as to be capable of reciprocating along the guide portion, a movable body arranged on the frame so as to be vertically movable, and supported by the movable body. A rotating mechanism, a rotating body that is rotated by the rotating mechanism and that releasably engages with the screw member, and a spring that applies a force for displacing the rotating body downward to the rotating body. It is preferable to include a moving mechanism that selectively moves the moving body upward and downward for engaging and disengaging the rotating body with the screw member. Thus, even if the moving amount of the rotating body in the vertical direction by the moving mechanism does not match the moving amount of the screw member in the vertical direction due to the screwing, the difference between the two moving amounts is absorbed by the spring. As a result, there is no risk that the engagement state between the rotating body and the screw member will be disengaged with the change in the screwed state of the screw member, and there will be no risk that unreasonable force will act on the processing mechanism and the screw member.

The support base is a base, and a mobile base movably supported on the base vertically and horizontally to support the processing mechanism, and the mobile base as the support base. On the other hand, it is preferable to include a drive mechanism that selectively displaces in the vertical direction and the horizontal direction. With this, the position of the processing mechanism with respect to the moving path of the screw member can be adjusted, and therefore the invention can be commonly applied to molds of different sizes.

[0020]

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 comprises a pair of half halves 14a, 14b each having a semi-circular cross-sectional shape and having a flange on one side or on both sides, and the flanges are stacked on each other and are horizontal. In this state, it is continuously moved from the right side to the left side in FIGS.

The form 12 is, for example, Japanese Patent Publication No. 59-4.
In the case where the two halves have a flange only on one side and are connected to each other by a hinge or the like on the other side, as in the case shown in FIG. 9 of Japanese Patent No. 9169. In this case, one fastening device may be arranged near the moving path of the mold 12.

However, the form 12 is, for example, Japanese Patent Publication Sho 59.
As in the formwork described in FIG. 1 of Japanese Patent Publication No. 49169/1990, when each half body has a flange on each side and is fastened by a screw member at each flange, a pair of tightening members is used. It is preferable to dispose the loosening devices so as to face each other with respect to the moving path of the mold 12 and perform the tightening work of the screw members by the both 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 flanges 16a and 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.

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 form 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. As a result, movement in the up-down direction and the front-back direction is prevented.
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. Drive mechanism 66
In the illustrated example, is a screw jack including a rotation source such as an electric motor, a pneumatic motor, and 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 provided with a frame 70 disposed on the second moving table 56 so as to be capable of reciprocating in the front-rear direction. Moving body 72 movably arranged to
A rotation mechanism 74 supported by the moving body, and a screw member 1
8, a rotating body 76 that is releasably engaged with the moving body 7, a moving mechanism 78 that moves the moving body 72 in the up-and-down direction for engaging and releasing the rotating body 76 with respect to the screw member 18, and the moving body 7.
2 and a cover 80 that protects the moving mechanism 78.

The frame 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 moving body 72 moves from the frame 70 to the moving body 72.
A plurality of rods 82 penetrating through and extending parallel to the upper side prevents movement in the front-rear direction and the left-right direction. The rod 82 is connected to the upper wall portion of the cover 80 at the upper end portion. The rotation mechanism 74 includes a rotation source such as an electric motor, a pneumatic motor, and a hydraulic motor. The moving mechanism 78 includes a jack such as a hydraulic or pneumatic cylinder mechanism.

The rotating mechanism 74 includes a pin 8 extending in the front-rear direction.
Mounting brackets 86, 88 connected so that they can pivot about
Is attached to the moving body 72. Mounting bracket 8
6 is attached to the moving body 72 so that the mounting metal fitting 88 projects toward the mold 12 side. The rotation mechanism 74 is shown in FIG.
The rotary shaft 90 is attached to the mounting bracket 88 so as to extend downward through a through hole formed in the mounting bracket 88 as shown in FIG.

Further, referring to FIG. 5, a pin 92 extending in the front-rear direction is attached to the attachment fitting 88.
Each end of the pin 92 is received in a hole 96 formed in the side wall portion 94 of the cover 80 so as to be movable along the hole 96. The hole 96 has a first portion that extends upward from below and a second portion that gradually retracts from the upper end of the first portion to the side opposite to the form 12.

Therefore, while the pin 92 is moved in the first portion of the hole 96, the mounting metal fitting 88 is arranged so that the rotation axes of the rotating mechanism 74 and the rotating body 76 move up and down as shown in FIGS. The rotating body 76 is maintained at a position corresponding to the moving path of the screw member 18 in the left-right direction while extending in the direction.
However, while the pin 92 is moved through the second portion of the hole 96, the mounting member 88 is tilted so that the rotating body 76 retracts from the moving path of the screw member 18 as shown in FIG.

Referring to FIG. 6, 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 a rotating shaft 90 of the rotating mechanism 74.
Is supported non-rotatably and vertically movably by an auxiliary member 92 attached so as to extend further downward from the rotation shaft, and is urged downward by a spring 100 arranged on the auxiliary member 98.

Referring to FIG. 7, each engagement mechanism 44 includes an engagement piece 102. In the engaging piece 102, the pin 104 extending in the vertical direction allows the engaging portion 102a to move in and out of the movement path of the mold, so that the engaging portion 10 is attached to the frame 70 of the processing mechanism 42.
It is attached at the end opposite to 2a. The engagement piece 102 is pivotally connected to one end of the link piece 106. The other end of the link piece 106 is bendably connected to one end of the link piece 108. The link piece 108 is
A pin 110 extending in the vertical direction is pivotally mounted on the frame 70, and a drive mechanism 112 angularly rotates the pin 110.

The drive mechanism 112 is a hydraulic or pneumatic cylinder mechanism in the illustrated example. The cylinder of this cylinder mechanism is connected to the frame 70, and the piston rod is connected to the link piece 108. When the drive mechanism 112 is extended, the link pieces 106 and 108 are extended, so that the engaging portion 102a of the engaging piece 102 is projected into the moving path of the mold. On the other hand, the drive mechanism 112
When is contracted, the link pieces 106 and 108 are bent, so that the engaging portion 102a of the engaging piece 102 is retracted from the movement path of the mold.

The engaging portion 102a of the engaging piece 102 engages with a predetermined portion of the mold in a state where the engaging portion 102a 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 102a 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.
The engagement portion 102 a engages with the holding member 22 of the fastening device 20.

When the link pieces 106 and 108 are bent, the engaging portion 102a projects into the moving path of the mold, and when the link pieces 106 and 108 are extended, the engaging portion 102a.
May be retracted from the moving path of the form.

Each engaging mechanism 44 further includes a processing mechanism 42.
The frame 70 includes a pair of slide shafts 114 arranged so as to be reciprocally movable in the front-rear direction. Both slide shafts 114
The front end portions and the rear end portions thereof are connected by connecting members 116 and 118, respectively. Both slide shafts 114 are biased by a spring 120 so that most of them are projected forward from the frame 70.

The connecting member 118 is designed so that when most of the slide shafts 114 are retracted into the frame 70, the link piece 1 is formed.
It is engaged with the link piece 108 so as to forcibly bend the link pieces 106 and 108 by pushing 08 backward. Therefore, when most of the slide shafts 114 are retracted into the frame 70, the link pieces 106 and 108 are pushed and bent by the connecting member, which causes the engaging portion 10 to move.
2a is forced to retreat from the moving path of the formwork.

Further referring to FIGS. 1 to 3, the return mechanism 46 is guided by both guide rails 68, and the slider 1 is arranged on the second moving table 56 so as to be reciprocally movable in the front-rear direction.
22 and a drive mechanism 124 for forcibly moving the slider 122 in the front-back direction. The slider 122 includes the processing mechanism 42 arranged in the frontmost part in front of the processing mechanism 42 arranged in the frontmost part and the connecting member 1 arranged in the processing mechanism 42 arranged in the frontmost part.
It is arranged so as to be able to abut.

The drive mechanism 124 includes a hydraulic or pneumatic cylinder mechanism. The slider 122 is the drive mechanism 12
4 is moved to the front by being extended, and the drive mechanism 1
When 24 is contracted, it is moved backward. The slider 122 has an abutment portion 126 that abuts the foremost processing mechanism 42 when it is moved rearward. Therefore, when the drive mechanism 124 is contracted, it is moved rearward to move the frontmost processing mechanism 42 rearward, and as a result, the processing mechanism 42 is brought into contact with the rearward processing mechanism 42 one after another. The processing mechanism 42 is simultaneously moved backward.

Referring to FIG. 8, the braking mechanism 48 includes a drive mechanism 130, a rod-shaped pusher 132 vertically moved by the drive mechanism, and a brake pad 134 attached to the lower surface of the pusher. Prepare The drive mechanism 130 is a telescopic mechanism using a hydraulic cylinder, a pneumatic cylinder mechanism, a solenoid mechanism, etc., and is attached to the upper wall portion 70a of the frame 70 so that the telescopic direction is the vertical direction. The pusher 132 slidably passes through the collar 136 attached to the lower wall portion 70b of the frame 70, and is connected to the drive shaft of the drive mechanism 130 at the upper end portion.

The pusher 132 is normally displaced upward by the spring 138. However, the corresponding processing mechanism 4
2 is stopped, the brake pad 134 is pressed against the brake rail 140 attached to the first moving table 56 by being pushed down by the drive mechanism 130. The force of the spring 138 is applied to the pusher 132.
A ring 142 is attached which acts on 32.

With further reference to FIGS. 1 to 3, the fastening device 10 further includes the frontmost processing mechanism 42 in front of it when the frontmost processing mechanism 42 is moved to the second position. A plurality of shock absorbers 144 attached to the slider 122 of the return mechanism 46 in a contactable manner, and the rearmost processing mechanism 42.
When it is moved to the first position, the rearmost processing mechanism 42
Includes a plurality of shock absorbers 146 mounted on the second movable table 56 so that they can abut on the rear surface thereof. Shock absorber 146
Are attached to the second movable table 56 by a mounting plate 148.

The shock absorbers 144, 146 are for reducing the impact and noise when the processing mechanism comes into contact. Therefore, the buffers 144 and 146 are connected to the processing mechanism 4
2 may be provided. Further, depending on the shapes of the second moving table 56 and the returning mechanism 46, the shock absorber 144 may be provided on the second moving table 56 or the shock absorber 146 may be provided on the returning mechanism 46. Further, a similar shock absorber may be provided so that one of the adjacent processing mechanisms 42 can contact the other of the adjacent processing mechanisms 42 when the adjacent processing mechanism 42 approaches.

At the time of standby, each processing mechanism 42 has the first operation shown in FIG.
Of the slider 12 of the return mechanism 46.
2 has been moved to the frontmost position. Fastening device 10
Are 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 112 of the engagement mechanism 44 of the frontmost processing mechanism 42 is driven. As a result, the engaging portion 102a of the engaging piece 102 of the engaging mechanism 44 is projected into the moving path of the mold 12, and the mold 12
Since it engages with a predetermined part of the
While being positioned with respect to the screw member 18 by the engaging mechanism 44, is moved forward following the movement of the mold 12.

During this time, when the second screw member 18 reaches a predetermined position, the drive mechanism 112 of the engagement mechanism 44 of the second processing mechanism 42 is driven, and the second processing mechanism 42 is moved to the first processing mechanism 42. Similarly to the above, the mold 12 is moved forward following the movement. 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 moving body 72 by the moving mechanism 78 while rotating the rotating body 76 by the rotating mechanism 74 while moving from the first position to the second position. After the tightening of 18 or the release thereof, the rotation of the rotating body 76 is stopped and the moving body 72 is stopped.
By moving the moving body 72 and the rotating body 76.
Perform the work to return the to the initial position.

When each processing mechanism 42 reaches the vicinity of the second position, the engaging portion 102a of the engaging mechanism 44 is retracted from the moving path of the mold, and then the driving mechanism 130 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
02a is retracted from the moving path of the mold by the drive mechanism 112. However, even if the engaging portion 102a is not retracted from the movement path of the mold, the engaging portion 102a is retracted by the contact portion 126 of the slider 122 or the previous processing mechanism 42. , Is reliably retracted from the moving path of the formwork 12.

When all the processing mechanisms 42 are moved to the second position, the driving mechanism 124 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.

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 43 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.

As with the fastening / loosening device 10, the processing mechanism 4
If the second rotating body 76 is rotated by the rotating mechanism 72 such as a motor, compared to the case where a rotating mechanism that generates a rotating force by an impact such as an impact wrench is used, the impact,
Vibration and noise are small. However, in the present invention, the rotating body 7
As the rotating mechanism 72 for 6, a mechanism such as an impact wrench that generates a rotating force by an impact may be used.

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.

[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.

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 cross-sectional view showing an example of a rotating body.

FIG. 7 is a diagram showing an example of an engagement mechanism.

FIG. 8 is a sectional view showing an example of a braking mechanism.

[Explanation of symbols]

 10 Closing Device 12 Form Frame 18 Screw Member 20 Fastening Device 40 Supporting Stand 42 Processing Mechanism 44 Engaging Mechanism 46 Returning Mechanism 48 Braking Mechanism 52 Base 54 First Moving Platform 56 Second Moving Platform 60, 66 For Moving Platform Drive mechanism 68 Guide rail 70 Frame 72 Moving body 74 Rotating mechanism 76 Rotating body 78 Moving mechanism 86, 88 Coupling metal fitting 90 Rotating shaft 98 Auxiliary member 100 Spring 102 Engaging piece 102a Engaging part 106, 108 Link piece 112 Engaging mechanism Drive mechanism 114 Slide shaft 120 Engagement mechanism spring 130 Braking mechanism drive mechanism 132 Pusher 134 Brake pad 136 Color 140 Brake rail 144, 146 Shock absorber

Claims (9)

[Claims] 1. A device for tightening or loosening a screw member arranged on a mold which is continuously moved in one direction, wherein a support base defining a guide portion extending in the moving direction of the mold and the screw member are provided. A plurality of processing mechanisms for rotating around the axis line, a first position on the support base along the guide portion, behind the moving direction of the formwork, and a second position on the front side in the moving direction of the formwork. A plurality of processing mechanisms that are reciprocally movable between and sequentially arranged, and an engaging mechanism that is arranged in each processing mechanism, releasably engages with the mold, and engages with the mold. While the moving mechanism receives a moving force from the mold to move the corresponding processing mechanism forward to the second position by following the mold, the advanced processing mechanism is retracted at the same time to move the first processing mechanism to the first position. And a returning mechanism for returning to the position of . 2. The tightening / loosening device according to claim 1, further comprising a braking mechanism disposed in each processing mechanism, the braking mechanism being in contact with the support base to apply a braking force to the corresponding processing mechanism. 3. The engagement mechanism comprises an engagement piece arranged in the corresponding processing mechanism so as to be able to move in and out of a movement path of the mold, and a pair of link pieces connected to each other in a bendable manner. Link piece connected to the engaging piece and the other link piece pivotally supported by the corresponding processing mechanism, and the engaging piece engaging the engaging piece with the mold. A fastening mechanism according to claim 1, including a drive mechanism for selectively maintaining both link pieces in their extended and bent states for selectively displacing them into a matable position and a non-engageable position. Loosening device. 4. Each of the engagement mechanisms further includes a slide shaft disposed in the corresponding processing mechanism so as to be capable of reciprocating in the moving direction of the mold, and a part of the slide shaft corresponding to the processing. A spring that acts on the slide shaft to maintain a forward projection from the mechanism, the slide shaft being one of the other processing mechanisms located in front of the return mechanism and the corresponding processing mechanism. The fastening device according to claim 3, wherein the linking pieces are displaced so that the engaging pieces are brought into contact with and the engaging pieces are displaced to a position where they cannot be engaged with the mold. 5. When one of the means selected from the returning mechanism and the support and one of the frontmost processing mechanism and the frontmost processing mechanism is moved to the front end portion of the guide portion. And a shock absorber disposed so as to be capable of abutting on the other of the one means and the frontmost processing mechanism.
The fastening device described in. 6. The one of the means selected from the returning mechanism and the support and one of the rearmost processing mechanism, and the rearmost processing mechanism is moved to the rear end portion of the guide portion. When including a shock absorber arranged so that abutment is possible at the other of said one means and said processing mechanism of the rearmost part.
The fastening device described in. 7. The return mechanism is arranged on the support base so as to be capable of reciprocating in the moving direction of the mold, and has a slider that can come into contact with the frontmost processing mechanism and the frontmost processing mechanism. The tightening / loosening device according to claim 1, further comprising a drive mechanism that moves the slider to return the slider from the second position to the first position. 8. Each processing mechanism includes a frame arranged on the support base so as to be capable of reciprocating along the guide portion, a movable body arranged vertically movable on the frame, and a movable body arranged on the movable body. A supported rotating mechanism, a rotating body that is rotated by the rotating mechanism and that releasably engages with the screw member, and a spring that applies a force for displacing the rotating body downward to the rotating body. The fastening device according to claim 1, further comprising: a moving mechanism that selectively moves the moving body upward and downward for engaging and disengaging the rotating body with the screw member. 9. The support base is a base, a movable base supported by the base so as to be movable in the vertical direction and the horizontal direction, the movable base supporting the processing mechanism, and the movable base. The tightening / loosening device according to claim 1, further comprising a drive mechanism for selectively displacing the support base vertically and horizontally.