JP3370508B2 - Bolt changing device used for chain drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pair of trolley bodies facing each other in the width direction of rails, a pair of rollers provided at the ends of both trolley bodies and rolling on the rails, and both trolley bodies. Used for a chain-type drive device that is composed of a drive link chain connected to the body, a bolt inserted into both trolley bodies, and a nut that is screwed to this bolt and fastens both trolley bodies Bolt exchange device.

[0002]

2. Description of the Related Art Conventionally, as seen in, for example, Japanese Patent Laid-Open No. 5-319254, a trolley portion is connected to a link chain which constitutes a drive device using a chain by connecting a center link on the link chain side with a pair of trolley bodies. It was done by sandwiching it, inserting a bolt between both trolley bodies, and screwing a nut onto this bolt. At that time, the exposed free end of the bolt interferes with other things such as in a curved path,
The exposed free end was crimped to prevent the nut from loosening.

The link chain constructed in this way is
The rollers mounted between the end portions of the trolley body are moved by the power of the drive device while being supported and guided by the guide rails. Then, by engaging a transmission body provided at an appropriate position of the link chain with a passive body on the trolley device side that is supported and guided by the trolley guide rail and is movable on a fixed path, this trolley device is connected to the link chain side. It can be moved by movement power.

If the link chain, the trolley body, the bolts, or the nuts are damaged as the use progresses, first,
After disconnecting the existing bolts and nuts and replacing the damaged link chain and trolley body with new ones, new bolts and nuts were used to connect the center link and both trolley bodies.

[0005]

According to the above-mentioned conventional type, since the free end of the existing bolt is caulked when dealing with damage to the link chain, the trolley body, the bolt, and the nut, the existing bolt and nut are However, the trolley body is unstable because it is supported by the rails via rollers, so it is difficult to melt the gas and the trolley body around the It was easy to get scratches on.

When the existing bolt and nut are separated and removed by gas fusing, the damaged link chain or trolley body is replaced with a new one, and new bolts and nuts are attached to both trolley bodies. There is a problem that the side trolley body is displaced in the traveling direction with respect to the other side trolley body.

Furthermore, after attaching new bolts and nuts to both trolley bodies, an operator uses a hammer to caulk the free ends of the bolts, but the trolley body is supported by rails via rollers. Therefore, there is a problem that it is unstable and it is difficult to crimp the bolt.

Therefore, the invention according to claim 1 of the present invention aims to easily and reliably separate the existing bolt and nut without damaging the trolley body and the like.
The invention according to claim 2 is intended to easily and surely crimp a newly installed bolt, and the invention according to claim 3 is to easily and surely position both trolley bodies when mounting a new bolt and nut. It is intended to be done.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is a pair of trolley bodies facing each other in the width direction of the rail, and ends of both trolley bodies. A pair of rollers provided on the rails and rolling on the rails, a drive link chain connected to the trolley bodies, a bolt inserted into the trolley bodies, and a screw threaded to the bolts A bolt exchanging device for use in a drive device using a chain configured with a nut for fastening a trolley body, which has a nut removing device that is detachable from the rail and removes the nut from the bolt. The removing device is provided with a receiving portion for receiving the head portion of the bolt, and a punching tool for punching the nut by facing the receiving portion and moving away from the receiving portion.

According to this, when dealing with damage to the link chain, the trolley body or the bolts and nuts, the nut removing device is attached to the rail, the head of the bolt is received by the receiving portion, and the punching tool is received against the receiving portion. It is possible to separate and remove the nut from the existing bolt by projecting it and punching out the nut. At this time, since the head portion of the bolt is received by the receiving portion, the bolt is stable, and the bolt and the nut can be separated easily and surely. Furthermore, it is possible to prevent the surrounding trolley body from being damaged as compared with the conventional separation by gas fusing. Then, the existing bolt and nut are removed, and the nut removing device is removed from the rail.

Further, when removing the existing bolts and nuts, it is not necessary to remove the drive unit from the rail, and the operation can be performed with the drive unit set on the rail.
Removal work can be done in a short time and easily.

According to a second aspect of the present invention, a pair of trolley bodies opposed to each other in the width direction of the rail, and a pair of rollers provided on the ends of both trolley bodies and rolling on the rails are provided.
A drive device for chain use comprising a drive link chain connected to both trolley bodies, a bolt inserted into both trolley bodies, and a nut screwed to the bolts to fasten both trolley bodies. A bolt exchanging device used, comprising a caulking device which is detachable from the rail and caulks the free end of the exchanged bolt, and the caulking device includes a receiving portion for receiving the head of the bolt, The present invention is characterized in that a caulking tool for caulking the free end of the bolt is provided by facing the receiving portion and moving away from the receiving portion.

According to this, when dealing with damage to the link chain, the trolley body or the bolts and nuts, the existing bolts and nuts are separated from each other and removed from both trolley bodies, and then the damaged link chain and trolley body are replaced with new ones. Replace it with a new bolt, insert a new bolt through both trolley bodies, screw a new nut, attach the caulking device to the rail, receive the new bolt head at the receiving part, and attach the caulking tool to the receiving part. The new end of the new bolt is crimped by projecting it toward the other end. In this way, since the head portion of the bolt is received by the receiving portion, the bolt is stable, and the free end of the bolt can be swaged more easily and reliably than in the case of using a conventional hammer. After caulking, remove the caulking device from the rail.

Further, when the bolt is caulked, it is not necessary to remove the driving device from the rail, and the driving device can be performed with the driving device set on the rail, so that the caulking work can be performed easily in a short time.

According to the third aspect of the present invention, a pair of trolley bodies opposed to each other in the width direction of the rail, and a pair of rollers provided on the ends of both trolley bodies and rolling on the rails.
A drive device for chain use comprising a drive link chain connected to both trolley bodies, a bolt inserted into both trolley bodies, and a nut screwed to the bolts to fasten both trolley bodies. The bolt exchanging device used is characterized by having a positioning device that is detachable from the rail and that positions both rollers in the traveling direction.

According to this, when dealing with damage to the link chain or trolley body or bolts and nuts, the existing bolts and nuts are separated from each other and removed from both trolley bodies, and then the damaged link chain and trolley body are replaced with new ones. If a new bolt is inserted into both trolley bodies and a new nut is screwed in, the positioning device is attached to the rail and both rollers are positioned in the traveling direction, thereby The trolley body on one side is prevented from being displaced in the traveling direction with respect to the trolley body on the other side. In this way, since both trolley bodies can be positioned easily and reliably, both trolley bodies can be accurately fastened to each other, and both trolley bodies can be correctly run through the rollers.

According to a fourth aspect of the present invention, in the nut removing device, the base body is detachably mountable to the rail, and the base body is movable in the length direction and the width direction of the rail and can be moved up and down. It is characterized in that it is composed of a main body attached to the main body, and the main body is provided with a receiving portion and a punching tool.

According to this, by mounting the base body on the rail and moving the main body in the length direction, the width direction and the vertical direction of the rail in accordance with the position of the head of the bolt, the receiving portion and the punching tool are separated. The nut can be punched out with a punching tool by precisely matching the position of the bolt and receiving it at the receiving part of the bolt head.

According to a fifth aspect of the present invention, in the caulking device, the base body is removably attachable to the rail, and the base body is movable in the length direction and the width direction of the rail and can be raised and lowered. It is characterized in that it is composed of an attached main body, and that the main body is provided with a receiving portion and a caulking tool.

According to this, the base body is attached to the rail, and the main body is moved in the length direction, the width direction, and the vertical direction of the rail according to the position of the head of the bolt, so that the receiving portion and the caulking tool are bolted. The head of the bolt can be received by the receiving portion and the free end of the bolt can be swaged by the swaging tool.

Further, in the invention according to claim 6, the nut removing device and the caulking device have a common structure of the base body, the main body and the receiving portion, and the punching tool and the caulking tool can be exchanged in the main body. It is characterized in that a mounting portion for mounting is provided.

According to this, first, the punching tool is attached to the attaching portion, and the existing bolt and nut are separated from each other and removed. After that, the punching tool is removed from the mounting portion, the caulking tool is mounted on the mounting portion, and the free end of the newly replaced bolt is caulked. Thus, by exchanging the punching tool and the crimping tool with each other, the nut removing device and the crimping device can be combined into one unit, which is economical.

According to a seventh aspect of the present invention, in the positioning device, the base body detachably attachable to the rail, the main body attached to the base body, and the one side roller attached to the main body. A pair of front and rear fixing arms that sandwich the front and rear of the body, and a pair of front and rear fixing arms that are attached to the main body and sandwich the front and rear of the roller on the other side.
These fixing arms are attached to the main body so as to be rotatable around the upper part to the outside of the rail.

According to this, by attaching the base body to the rail and sandwiching the front and rear of the roller on one side with one fixing arm, and the front and rear of the roller on the other side with the other fixing arm, Since both rollers are fixed on the rail by the fixing arms, the trolley body on one side is prevented from being displaced in the traveling direction with respect to the trolley body on the other side. Further, the positioning device can be removed from the rail by removing the base body from the rail.

The invention according to claim 8 has a nut removing device, a caulking device, and a positioning device, and the nut removing device and the positioning device are arranged from the upstream side to the downstream side of the moving path of the trolley body. The squeezing device is arranged in this order.

According to this, the removal work of the existing bolts and nuts, the installation work of the new bolts and nuts, and the caulking work of the new bolts can be carried out in succession.
Easy nut replacement work in a short time. Further, when exchanging the bolts and nuts, it is not necessary to remove the drive unit from the guide rails, and the drive unit can be performed with the drive unit set on the guide rails.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1, 5 and 6, 1 is a drive device using a chain, and a pair of trolley bodies 3 facing each other in the width direction of the guide rail 2 having an I-shaped cross section.
a, 3b, and a pair of rollers 4a provided on the upper ends of both trolley bodies 3a, 3b and rolling on the guide rail 2 described above.
4b, a driving link chain 5 connected to the trolley bodies 3a, 3b, a pair of upper and lower bolts 6a, 6b inserted through the lower portions of the trolley bodies 3a, 3b, and the bolts 6a, 6b. It is constituted by nuts 7a and 7b which are joined together to fasten both trolley bodies 3a and 3b.

The link chain 5 is composed of a center link 8 formed in a long ring shape in plan view and a side link 10 connected to the center link 8 via a connecting pin 9. A transmission 11 is provided on the side link 10 at a predetermined position in the length direction of the link chain 5. The center link 8 is externally fitted and connected to the lower portions of the trolley bodies 3a and 3b. A buffer plate 12 is provided between the trolley bodies 3a and 3b. The free ends of the bolts 6a and 6b are crimped, and the crimped portions 13 prevent the nuts 7a and 7b from loosening. Incidentally, the pair of trolley bodies 3
A pair of a and 3b are connected to the link chain 5 at a predetermined pitch P in front and rear.

A trolley guide rail 16 is installed below the guide rail 2, and the trolley guide rail 16 is
For example, it guides and supports the trolley device 17 that conveys the car body of an automobile. In the front trolley 18 of this trolley device 17,
A passive body 19 that can be engaged and disengaged with the transmission body 11 from the link chain 5 side is provided.

Here, as indicated by the phantom line in FIG.
Are both bolts 6a, 6b and a nut 7 of the drive unit 1.
A bolt exchanging device used when exchanging a and 7b, including a nut removing device 21, a caulking device 22, and a positioning device.
23 and.

The structure of the nut removing device 21 will be described below. That is, as shown in FIG. 1 to FIG. 3, the nut removing device 21 includes the nuts 7a and 7a from the bolts 6a and 6b.
A device for removing b, which is detachably attachable to the guide rail 2, and a base body 24 which is attached to the base body 24 so as to be movable in the length direction and the width direction of the guide rail 2 and to be vertically movable. It is composed of a body 25.

The base body 24 is formed in a flat plate shape that can be placed on the upper surface of the guide rail 2, and the back surface of the base body 24 is
A clamp device 26 is provided to detachably connect the base body 24 to the guide rail 2. This clamp device 26
The guide rail 2 is composed of a pair of left and right fixed clamp pieces 27 and a movable clamp piece 28 that sandwich the upper end portion of the guide rail 2 from the width direction. The fixed clamp piece 27 is fixed to the back surface of the base body 24 via a mounting screw 29. Movable clamp piece
28 is attached to the back surface of the base body 24 via a mounting screw 30 so as to be movable in the approaching and separating direction with respect to the fixed clamp piece 27. The movable clamp piece 28 can be pressed toward the fixed clamp piece 27 by a clamp screw 31, and the clamp screw 31 is screwed into a holding member 32 attached to the back surface of the base body 24.

The main body 25 is supported and guided by a pair of left and right guide members 33 attached to the upper surface of the base body 24 and is movable in the front-rear direction (the length direction of the guide rail 2), and a first support base 34. Via a second support base 36, which is supported and guided by a pair of front and rear guide members 35 mounted on the upper surface of the first support base 34 and is movable in the left-right direction (width direction of the guide rail 2), and a mounting screw 37. The third support base 38 is mounted on the second support base 36, and the frame body 39 is supported on the third support base 38 so as to be vertically movable. The third support table
The height adjustment bolt 40 is provided on the 38, and when the third support base 38 is attached to the second support base 36 by using the mounting screw 37, the height adjustment bolt 40 is used to attach the third support base 38 to the third support base 38. The height can be adjusted. Further, the third support base 38 is provided with a pair of front and rear air cylinder devices 41 for raising and lowering the frame body 39. Accordingly, as shown in FIG. 3, by removing the mounting screw 37, the nut removing device 21
It is divided into two parts, that is, a third support base 38, a set of frame bodies 39 A, a base body 24, a first support base 34, and a set B of second support bases 36.

The frame body 39 is formed in a gate shape in a front view, and a receiving portion 44 for receiving the heads of the bolts 6a and 6b is provided at a lower end portion on one side of the frame body 39. . The receiving portion 44 is formed with a fitting recess 46 into which the heads of the bolts 6a and 6b can be fitted and whose upper portion is open. A hydraulic cylinder portion 47 is provided at the lower end portion on the other side of the frame body 39. In this hydraulic cylinder portion 47, a piston rod 49 that protrudes from the hydraulic cylinder portion 47 toward the receiving portion 44 by hydraulic pressure via a built-in piston 48, and the piston rod 49 is connected via the piston 48 to the hydraulic cylinder portion 47. A compression coil spring (50) is provided that urges the compression coil spring (50) in a direction of retracting inward.

A punching punch 51 (an example of a punching tool) for punching out the nuts 7a and 7b is detachably attached to the tip of the piston rod 49. The punching punch 51 has a sharp tip, and at the base end of the punching punch 51, a mounting hole 52 formed at the tip of the piston rod 49.
An insertion portion 53 that can be freely inserted and removed is formed in (an example of the attachment portion). Also, at the tip of the piston rod 49, the mounting hole 52
Retaining screw 54 that prevents the insertion part 53 inserted in the
Is provided.

Next, the structure of the caulking device 22 will be described. That is, as shown in FIG. 7, the caulking device 22 is a device for caulking the free ends of the newly replaced bolts 6a and 6b, and is the same base body as the nut removing device 21 described above.
It is composed of 24 and a main body 25. A punch 57 for swaging (an example of swaging tool) is provided at the tip of the piston rod 49 for swaging the free ends of the bolts 6a, 6b.
Is detachably attached. Crimping punch 57 above
An arcuate recess 58 is formed at the tip of the. Further, at the base end portion of the crimping punch 57, an insertion portion 53 which can be inserted into and removed from the attachment hole 52 is formed. Then, as shown in FIG.
The punching punch 51 and the caulking punch 57 are interchangeably attached to the attachment hole 52 depending on the application.

Next, the structure of the positioning device 23 will be described. That is, as shown in FIG. 9 and FIG.
Reference numeral 23 is a device for positioning both rollers 4a and 4b in the traveling direction, and includes a base body 60 detachably attachable to the guide rail 2, a main body 61 attached to the base body 60, and a main body 61. Mounted on both rollers 4a, 4b
Is composed of a total of four fixing arms 62a and 62b.

The base body 60 is formed in a flat plate shape that can be placed on the upper surface of the guide rail 2, and the base body 60 is provided with a pair of front and rear clamp devices 63 for detachably connecting the base body 60 to the guide rail 2. It is provided. Each of the clamp devices 63 is provided with a locking member 64 provided on one side of the base body 60 and capable of locking with one side surface of the upper portion of the guide rail 2,
A small hydraulically driven ball plunger 65 is provided on the other side of the base body 60 and can press the other side surface of the upper portion of the guide rail 2.

A pair of left and right support shafts 66 having an axial center in the front-rear direction (length direction of the guide rail 2) are inserted into the main body 61 centering on the center. Each fixing arm 62 above
a and 62b are fitted onto both ends of both support shafts 66 and hang down,
It is rotatably attached to the outside of the guide rail 2 about the upper part. Of these, one of the pair of front and rear fixing arms 62a has one side roller 4a in a suspended state.
The front and rear of the roller 4b can be sandwiched, and the other pair of front and rear fixing arms 62b can sandwich the front and rear of the roller 4b on the other side in a suspended state. Further, the middle portions of the pair of front and rear fixing arms 62a are connected by one connecting plate 67a,
The intermediate portions of the other pair of front and rear fixing arms 62b are connected by the other connecting plate 67b. In addition, the main body 61,
A handle 68 for carrying the positioning device 23 is provided.

The operation of the above structure will be described below.
As the trolley device 17 or the like is used, the link chain 5, the trolley bodies 3a and 3b, or the bolts 6a and 6b.
When the nuts 7a and 7b or the nuts 7a and 7b are damaged, first, the existing bolts 6a and 6b and the nuts 7a and 7b are separated and removed by the nut removing device 21, and the damaged link chain 5
After replacing the trolley bodies 3a and 3b with new ones, the rollers 4a and 4b are positioned by the positioning device 23, and new bolts 6a and 6b and nuts 7a and 7b are used to link the link chain 5 and both trolley bodies. 3a and 3b are connected, and then the free ends of the new bolts 6a and 6b are caulked.
Work proceeds in a procedure such as caulking at 22.

That is, as shown by the phantom line in FIG. 6, the nut removing device 21, the positioning device 23 and the caulking device 22 are arranged in this order from the upstream side to the downstream side of the moving path 69 of the trolley device 17. The nut removing device 21, the positioning device 23, and the caulking device 22 are attached to the guide rail 2 with a front-rear spacing of a predetermined pitch P between the trolley bodies 3a and 3b.

As shown in FIG. 3, the method for mounting the guide rail 2 on the guide rail 2 is such that the nut removing device 21 and the caulking device 22 each include a base body 24 having a first support base 34 and a second support base 36. Place it on the upper surface of the guide rail 2
By fitting the upper end part of the between the fixed clamp piece 27 and the movable clamp piece 28, tightening the clamp screw 31 and pressing the movable clamp piece 28 toward the fixed clamp piece 27,
The upper end of the guide rail 2 is clamped by the fixed clamp piece 27 and the movable clamp piece 28, and the base body 24 is connected and fixed to the guide rail 2.

After that, the third support base provided with the frame body 39
38 is placed on the second support base 36, and attached with the mounting screws 37. At this time, if it is necessary to adjust the height of the third support base 38,
The height adjustment bolt 40 is used to adjust the height of the third support base 38. Thereby, as shown in FIGS. 1 and 7, the nut removing device 21 and the caulking device 22 can be mounted on the guide rail 2.

Further, as shown in FIG. 9, a positioning device
23, the base body 60 is placed on the upper surface of the guide rail 2, and the upper end portion of the guide rail 2 is fixed to the locking member 64 and the ball plunger.
65 and the ball plunger 65 using hydraulic pressure.
By pressing the other side surface of the upper portion of the guide rail 2 with, the upper end portion of the guide rail 2 is clamped by the locking member 64 and the ball plunger 65, and the base body 60 is connected and fixed to the guide rail 2. Thereby, the positioning device 23 can be mounted on the guide rail 2.

First, as shown in FIG. 1, the air cylinder device 41 of the nut removing device 21 is operated to operate the frame body.
While raising and lowering 39, the first support base 34 is manually moved in the front-rear direction (the length direction of the guide rail 2) as shown in FIG. 2 to move the fitting recess 46 of the receiving portion 44 into the lower bolt 6a.
To the position of the head of. After that, as shown from the phantom line in FIG. 1 to the solid line, the second support base 36 is manually moved in the left-right direction (the width direction of the guide rail 2) to lower the bolt 6
The fitting recess 46 is fitted onto the head of a. As a result, the head portion of the lower bolt 6a is received by the receiving portion 44.

Thereafter, the punching punch 51 punches the lower nut 7a by pushing the piston rod 49 against the urging force of the compression coil spring 50 by the hydraulic pressure, and the lower nut 7a pushes the bolt 6a. Separated from. At this time, since the head portion of the lower bolt 6a is fitted into the fitting recess 46 and received by the receiving portion 44, the lower bolt 6a is stable and the bolt 6a and the nut 7a can be easily and reliably separated.

After that, by releasing the hydraulic pressure supplied to the hydraulic cylinder portion 47, the piston rod 49 retreats by the urging force of the compression coil spring 50, and the punching punch 51 separates from the lower bolt 6a. Then, as shown from the solid line to the phantom line in FIG. 1, the second support base 36 is manually moved in the left-right direction (the width direction of the guide rail 2) to move the head portion of the lower bolt 6a to the receiving portion 44. The lower bolts 6a can be removed from both trolley bodies 3a and 3b by separating them. At this time, the punched nut 7a
Is left on the tip of the punching punch 51, the operator may remove the remaining nut 7a from the punching punch 51. By using the nut removing device 21 in this manner, it is possible to prevent the surrounding trolley bodies 3a and 3b from being damaged as compared with the conventional separation by gas fusing.

After that, as shown in FIG. 4, the air cylinder device 41 is operated to raise the frame body 39, and the receiving portion is received.
The fitting recess 46 of 44 is aligned with the position of the head of the upper bolt 6b, and the upper bolt 6b and the nut 7b are removed in the same manner as the lower bolt 6a and the nut 7a described above.

In this way, after removing the existing bolts 6a, 6b and the nuts 7a, 7b of either one of the front and rear trolley bodies 3a, 3b, as shown by the phantom line in FIG. By manually moving the first support base 34 in the front-rear direction (the length direction of the guide rail 2), the existing bolts 6a, 6b and the nut 7a of the other two trolley bodies 3a, 3b adjacent in the front-rear direction are provided. , 7b can be removed. After that, the damaged link chain 5 and the trolley bodies 3a and 3b are replaced with new ones.

Thereafter, as shown by the phantom line in FIG. 9, the fixing arms 62a and 62b of the positioning device 23 are rotated in advance to the outside of the guide rail 2 to move the link chain 5 by a predetermined pitch P. By driving to the downstream side,
The rollers 4a and 4b reach the position of the positioning device 23. After that, as shown by the solid line in FIG. 9, each fixing arm 62a, 62a
By rotating and hanging down b, one fixing arm 62a sandwiches the front and rear of the roller 4a on one side and the other fixing arm 62b rotates the roller on the other side as shown in FIG. Clap before and after 4b. At this time, the fixing arm 62
When the positions of a and 62b are displaced forward and backward with respect to the rollers 4a and 4b, the hydraulic pressure supplied to the ball plunger 65 is released and the base body 60 is moved in the forward and backward direction (the length direction of the guide rail 2). After shifting, hydraulic pressure is supplied to the ball plunger 65 again to connect and fix the base body 60 to the guide rail 2.

As described above, the pair of left and right rollers 4a,
4b is sandwiched between a pair of front and rear fixing arms 62a and 62b and fixed on the guide rail 2, so that the trolley body 3a on one side is displaced in the traveling direction with respect to the trolley body 3b on the other side. Is prevented.

In this state, new bolts 6a and 6b are inserted into both trolley bodies 3a and 3b, and these new bolts 6a and 6b are inserted.
New nuts 7a and 7b are screwed on the free ends of a and 6b to fasten both trolley bodies 3a and 3b. At this time, since both trolley bodies 3a and 3b can be easily and reliably positioned, the two trolley bodies 3a and 3b are replaced by new bolts 6a and 6b.
b, nuts 7a, 7b are accurately fastened.

After that, the link chain 5 is moved to a predetermined pitch P.
Drive the new bolt 6
Both trolley bodies 3 fastened with a, 6b and nuts 7a, 7b
The positions a and 3b reach the position of the caulking device 22. Then, as in the case of the nut removing device 21 described above, as shown in FIG. 7, the fitting recess 46 of the caulking device 22 is externally fitted to the head of the newly replaced lower bolt 6a. As a result, the head portion of the lower bolt 6a is received by the receiving portion 44.

Thereafter, the piston rod 49 is projected so that the caulking punch 57 contacts the free end of the lower bolt 6a to caulk the free end of the bolt 6a. As described above, since the head portion of the bolt 6a is received by the receiving portion 44, the bolt 6a is stable, and the free end of the bolt 6a can be swaged more easily and more reliably than when the conventional hammer is used. it can.

Thereafter, the piston rod 49 retracts by the urging force of the compression coil spring 50, and the punch for caulking is punched.
57 is separated from the lower bolt 6a, and the second manually
The support base 36 is moved in the left-right direction (width direction of the guide rail 2) to separate the receiving portion 44 from the head of the lower bolt 6a.

Thereafter, the air cylinder device 41 is actuated to raise the frame body 39 to align the fitting recess 46 of the receiving portion 44 with the position of the head of the upper bolt 6b, similar to the lower bolt 6a described above. Then, the free end of the upper bolt 6b is caulked. This removes the existing bolts 6a, 6b, the nuts 7a, 7b and the new bolts 6a, 6b,
Installation work of nuts 7a, 7b and new bolts 6a, 6
Since the caulking work of b can be performed continuously, the bolts 6a,
6b and nuts 7a and 7b can be easily replaced in a short time. Furthermore, when exchanging the bolts 6a, 6b and the nuts 7a, 7b, it is not necessary to remove the drive unit 1 from the guide rail 2, and the drive unit 1 can be performed with the drive unit 1 set on the guide rail 2. Work can be performed in a shorter time and easily.

After the above replacement work, the nut removing device
When removing 21 and the crimping device 22 from the guide rail 2, as shown in FIG. 3, the nut removing device 21 and the crimping device 21 are removed.
3rd with the frame body 39 by removing each mounting screw 37 of 22
Remove the support set 38 A from the second support 36, and then
The clamp screw 31 is loosened, and the movable clamp piece 28 is displaced in the direction away from the fixed clamp piece 27 to release the clamp, and the base body having the first support base 34 and the second support base 36.
24 Set B can be removed from the guide rail 2.

As shown in FIG. 9, the positioning device 23
When removing the guide rail 2 from the guide rail 2, by releasing the hydraulic pressure supplied to the ball plunger 65, the pressing force acting on the upper side surface and other side surface of the guide rail 2 of the ball plunger 65 is eliminated, so that the locking member 64 and the ball plunger are removed. 65
The clamp by is released, and the positioning device 23 can be removed from the guide rail 2.

Further, as shown in FIG. 3, the nut removing device 21 and the caulking device 22 are respectively provided with a third supporting base 38 having a frame body 39 by removing a mounting screw 37 and a first supporting member 38. Since it can be divided into two parts, that is, the base body 24 including the base 34 and the second support base 36, it can be conveniently stored or transported.

In the above-described embodiment, the nut removing device 21 and the caulking device 22 are individually provided on the guide rail 2, but either one of the nut removing device 21 and the caulking device 22 is provided and shown in FIG. First, insert the punching punch into the mounting hole 52.
51 is attached, and existing bolts 6a, 6b and nuts 7a,
After separating and removing 7b, the punching punch 51 is removed from the piston rod 49 by removing the retaining screw 54. Then, by inserting the insertion portion 53 of the caulking punch 57 into the mounting hole 52 and preventing the caulking punch 57 from coming off with the retaining screw 54, the caulking punch 57 is attached to the piston rod 49, and the newly installed bolts 6a and 6b are attached. The free end of may be crimped. In this way, by exchanging the punching punch 51 and the caulking punch 57, the nut removing device 21 and the caulking device 22 are exchanged.
It is economical because both and can be used together.

In the above-described embodiment, the air cylinder device 41 is used to raise and lower the frame body 39 of the nut removing device 21 and the caulking device 22, but a hydraulic cylinder device may be used. Further, although the hydraulic cylinder portion 47 is provided to move the punching punch 51 of the nut removing device 21 and the crimping punch 57 of the crimping device 22 in and out, an air cylinder portion may be provided. Furthermore, the ball plunger of the positioning device 23
Although 65 is a hydraulic drive type, it may be an air drive type.

[0062]

As described above, according to the first aspect of the present invention, when dealing with damage to the link chain, the trolley body or the bolts and nuts, the nut removing device is mounted on the rail and received. Received the head of the bolt at the
The nut can be separated and removed from the existing bolt by punching the nut with the punching tool protruding toward the receiving portion. At this time, since the head portion of the bolt is received by the receiving portion, the bolt is stable, and the bolt and the nut can be separated easily and surely. Furthermore, it is possible to prevent the surrounding trolley body from being damaged as compared with the conventional separation by gas fusing. Then, the existing bolt and nut are removed, and the nut removing device is removed from the rail.

Further, when removing the existing bolts and nuts, it is not necessary to remove the drive unit from the rail, and the operation can be performed with the drive unit set on the rail.
Removal work can be done in a short time and easily.

According to the second aspect of the invention, when dealing with damage to the link chain, the trolley body or the bolts and nuts, the existing bolts and nuts are separated from each other and removed from both trolley bodies, and then damaged. Replace the link chain or trolley body with a new one, insert new bolts into both trolley bodies, screw in new nuts, attach the caulking device to the rail, and receive the new bolt head at the receiving part. , The caulking tool is projected to the receiving portion and the free end of the new bolt is caulked. In this way, since the head portion of the bolt is received by the receiving portion, the bolt is stable, and the free end of the bolt can be swaged more easily and reliably than in the case of using a conventional hammer. After caulking, remove the caulking device from the rail.

Further, when the bolt is caulked, it is not necessary to remove the drive device from the rail, and the drive device can be performed with the drive device set on the rail, so that the caulking work can be performed easily in a short time.

According to the third aspect of the invention, when dealing with damage to the link chain, the trolley body or the bolts and nuts, the existing bolts and nuts are separated from each other and removed from both trolley bodies, and then damaged. When replacing the link chain or trolley body with a new one, and then inserting a new bolt into both trolley bodies and screwing in a new nut, attach a positioning device to the rail and position both rollers in the running direction. This prevents the trolley body on one side of the pair of trolley bodies from being displaced in the traveling direction with respect to the trolley body on the other side. in this way,
Since both trolley bodies can be easily and reliably positioned, both trolley bodies can be accurately fastened to each other, and the two trolley bodies can be correctly moved through the rollers. According to the invention as set forth in claim 4, the base body is attached to the rail, and the main body is moved in the length direction, the width direction, and the vertical direction of the rail in accordance with the position of the head of the bolt, so that the receiving portion is driven. The nut and the punch can be punched out by accurately aligning the pulling tool with the position of the bolt, receiving the head of the bolt by the receiving portion.

According to the fifth aspect of the present invention, the base body is attached to the rail, and the main body is moved in the length direction, the width direction, and the vertical direction of the rail in accordance with the position of the head of the bolt. The portion and the caulking tool can be accurately aligned with the position of the bolt, and the head of the bolt can be received by the receiving part to caulk the free end of the bolt.

According to the sixth aspect of the present invention, first, the punching tool is attached to the attaching portion, and the damaged bolt and nut are separated from each other and removed. After that, the punching tool is removed from the mounting portion, the caulking tool is mounted on the mounting portion, and the free end of the newly replaced bolt is caulked. Thus, by exchanging the punching tool and the crimping tool with each other, the nut removing device and the crimping device can be combined into one unit, which is economical.

According to the seventh aspect of the invention, the base body is attached to the rail, and one fixing arm sandwiches the front and rear of the roller on one side, and the other fixing arm moves the roller on the other side. Both rollers are fixed on the rail by sandwiching them by the above-mentioned fixing arms, so that the trolley body on one side is prevented from being displaced in the traveling direction with respect to the trolley body on the other side. It Further, the positioning device can be removed from the rail by removing the base body from the rail.

Further, according to the invention of claim 8, the work of removing the existing bolts and nuts, the work of mounting the new bolts and nuts, and the work of crimping the new bolts can be carried out in succession. Exchange work can be done easily in a short time. Furthermore, it is not necessary to remove the drive unit from the guide rail when replacing the bolts and nuts.
Since the drive device can be performed with the drive device set on the guide rail, the replacement work can be performed in a shorter time and easily.

[Brief description of drawings]

FIG. 1 is a front view of a nut removing device of a bolt exchanging device according to an embodiment of the present invention.

FIG. 2 is a side view of the nut removing device.

FIG. 3 is a front view when the nut removing device is divided into two parts.

FIG. 4 is a front view when the frame body of the nut removing device is raised.

FIG. 5 is a partially enlarged side view of the drive device.

FIG. 6 is a side view of a drive device.

FIG. 7 is a front view of a caulking device of the bolt exchanging device.

FIG. 8 is an enlarged view of a mounting portion of a nut removing device and a caulking device, and a punching tool and a caulking tool.

FIG. 9 is a front view of a positioning device of the bolt exchanging device.

FIG. 10 is a side view of the positioning device.

[Explanation of symbols]

1 drive 2 Guide rail 3a, 3b Trolley body 4a, 4b rollers 5 link chains 6a, 6b bolt 7a, 7b nuts 20 bolt changer 21 Nut remover 22 Caulking device 23 Positioning device 24 base body 25 body 44 Receiver 51 Punch for punching (punching tool) 52 Mounting hole (mounting part) 57 Caulking punch (caulking tool) 60 base body 61 body 62a, 62b fixing arm 69 Travel route

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) B23P 19/04 B23P 19/02 B21L 21/00

Claims (8)

(57) [Claims] 1. A pair of trolley bodies facing each other in the width direction of the rails, a pair of rollers provided at the ends of both trolley bodies and rolling on the rails, and a drive connected to the both trolley bodies. A bolt exchanging device for use in a chain-use drive device comprising a link chain for use in a chain, a bolt inserted into both trolley bodies, and a nut that is screwed to the bolt and fastens both trolley bodies. , Having a nut removing device that is detachable from the rail and removes the nut from the bolt, and that the nut removing device has a receiving portion that receives the head portion of the bolt, and is close to and away from the receiving portion while facing the receiving portion. And a punching tool for punching out the nut by the bolt exchanging device for use in a drive device using a chain. 2. A pair of trolley bodies facing each other in the width direction of the rails, a pair of rollers provided on the end portions of the trolley bodies and rolling on the rails, and a drive connected to the trolley bodies. A bolt exchanging device for use in a chain-use drive device comprising a link chain for use in a chain, a bolt inserted into both trolley bodies, and a nut that is screwed to the bolt and fastens both trolley bodies. And a caulking device which is detachable from the rail and caulks the free end of the replaced bolt, and the caulking device has a receiving portion for receiving the head portion of the bolt and a space for facing the receiving portion. Accordingly, a bolt exchanging device used in a drive device using a chain, characterized in that a caulking tool for caulking the free end of the bolt is provided. 3. A pair of trolley bodies facing each other in the width direction of the rails, a pair of rollers provided at the end portions of both trolley bodies and rolling on the rails, and a drive connected to the both trolley bodies. A bolt exchanging device for use in a chain-use drive device comprising a link chain for use in a chain, a bolt inserted into both trolley bodies, and a nut that is screwed to the bolt and fastens both trolley bodies. A bolt exchanging device used in a drive device using a chain, comprising a positioning device which is detachable from the rail and which positions the both rollers in the traveling direction. 4. The nut removing device comprises a base body detachably attachable to a rail, and a main body attached to the base body so as to be movable in the length direction and width direction of the rail and vertically movable. The bolt exchanging device for use in a chain-using drive device according to claim 1, wherein the main body is provided with a receiving portion and a punching tool. 5. The caulking device comprises a base body detachably attachable to a rail, and a main body attached to the base body so as to be movable in a length direction and a width direction of the rail and vertically movable. The bolt exchanging device used in the chain drive device according to claim 2, wherein the main body is provided with a receiving portion and a caulking tool. 6. The nut removing device and the caulking device have a base body, a main body, and a receiving part as a common component, and the main body is provided with:
The bolt exchanging device used in the chain drive device according to claim 4 or 5, further comprising an attachment portion to which the punching tool and the caulking tool are attached so as to be exchangeable. 7. The positioning device includes a base body detachably attachable to a rail, a main body attached to the base body, and a pair of front and rear sides attached to the main body and sandwiching the front and rear of a roller on one side. It is composed of one fixing arm and a pair of the other fixing arms attached to the main body on both sides of the roller on the other side, and these fixing arms are centered on the upper part of the main body. The bolt exchanging device used in the chain drive device according to claim 3, wherein the bolt exchanging device is rotatably attached to the outer side of the rail. 8. A nut removing device, a caulking device, and a positioning device, wherein the nut removing device, the positioning device, and the caulking device are arranged in this order from the upstream side to the downstream side of the moving path of the trolley body. A bolt exchanging device for use in a drive device using a chain according to any one of claims 1 to 3.