JPH0419021A - Bolt fastening device - Google Patents

Abstract

PURPOSE:To supply bolt effectively to a bolt fastening machine in a short time by holding once a variety of bolts in a bolt holding jig, and supplying them to a bolt fastening means in a lump with the bolt holding jig. CONSTITUTION:To one of the two bolt holding means 1, bolts to be fixed on a work W previously are supplied by a bolt supplying means 2 and held there, and the No.1 bolt holding jig 1 is stopped below a jig transfer means 4. A bolt fastening means 3 moves the jig holding part 55 of the other bolt holding jig 1 held in the jig holding part 55 to under the jig transfer means 4 by a 3-shafting robot, and it is stopped there. In parallel with carrying-in of the work W, the jig transfer means 4 exchanges the two bolt holding jigs 1, 1 between the two jig holding parts 35, 55 and makes transfer, and the No.1 bolt holding jig 1 is held by the jig holding part 55 of the bolt fastening means 3 while No.2 bolt holding jig 1 which is empty is held by the jig holding part 35 of the bolt supplying means 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for tightening a plurality of types of bolts to a workpiece.

(Prior Art) Conventionally, bolt tightening devices used in manufacturing lines for various workpieces include a bolt tightening machine that tightens bolts to the workpiece using a nut runner, etc., and a bolt supply system such as a chute rail to the bolt tightening machine. The bolt tightening machine is attached to a movable part such as the arm of the XY child table robot, and tightens the bolts supplied from the bolt supply machine to the workpiece. It is inserted into the hole and tightened to the workpiece.

In this case, if the bolt feeder is attached to the movable part together with the bolt tightening machine, the weight of the combined movable part increases, which is disadvantageous in terms of operability and durability of the movable part and its drive device. Therefore, the bolt feeder is generally installed outside the movable part, and when feeding bolts to the bolt tightening machine, the bolt tightening machine is moved together with the movable part toward the bolt supply path of the bolt feeder. I try to move it.

For example, in the bolt tightening device disclosed in Japanese Patent Application Laid-Open No. 57-156174, a bolt supply section capable of supplying the bolts necessary for one cycle of bolt tightening work to the bolt tightening machine is used to tighten the bolts. There is an xY table with a machine attached to it. Further, a bolt feeder equipped with a chute rail is provided on a fixed base that movably supports the xY child table. Then, when the number of bolts in the bolt supply section on the bolt tightening machine side is reduced to a predetermined number or less, the bolt supply section is moved together with the bolt tightening machine toward the outlet of the chute rail via the XY child table, Bolts are supplied from the chute rail to the bolt tightening machine via a bolt supply section.

However, in this type of bolt tightening device, especially when tightening multiple types of bolts to a workpiece, the bolt supply machine is provided with a bolt supply path for each type of bolt, so the XY child table is The driving device of the movable part not only moves the bolt tightening machine toward each bolt tightening hole of the workpiece, but also moves the bolt tightening machine to supply bolts in order to supply multiple types of bolts to the bolt tightening machine. It had to be moved sequentially towards each bolt feed path of the machine, which increased the load on the drive and reduced its durability.

In addition, for example, if the bolt tightening machine and the bolt supply machine must be installed on opposite sides of the line due to the configuration of the bolt tightening device and the workpiece production line, the bolt tightening machine must be moved along with the moving parts across the line towards the bolt feeder. For this reason, the operating range of the bolt tightening machine and the movable parts becomes larger, and the structure thereof becomes larger. This further increases the load on the drive device, etc., and it takes time to supply bolts to the bolt tightening machine. There was a risk that the work efficiency would decrease.

Furthermore, with this type of bolt tightening device, especially when tightening multiple types of bolts to a workpiece, each bolt is supplied to the bolt tightening machine in order by type while the work of tightening the bolts to the workpiece is stopped. For this reason,
The time required to supply bolts to the bolt tightening machine becomes longer, increasing the downtime of the bolt tightening operation, and this becomes an obstacle to improving the efficiency of the bolt tightening operation and, by extension, the workpiece production line. was.

(Problem to be Solved) The present invention eliminates such inconvenience and, when tightening multiple types of bolts to a workpiece, efficiently supplies each bolt to a bolt tightening machine that performs the tightening work of these bolts in a short time. It is an object of the present invention to provide a device that can simplify and reduce the movement of a bolt tightening machine during supply, thereby reducing the load on the drive device that performs the movement.

(Means for Solving the Problems) In order to achieve the above object, a first aspect of the bolt tightening device of the present invention is a device for tightening a plurality of types of bolts to a workpiece positioned at a predetermined position, A bolt holding jig that can detachably hold each bolt to be tightened in a predetermined position, and a first jig holding part that detachably holds the bolt holding jig, and the bolt holding jig is held in the jig holding part. a bolt supply means for supplying each bolt to be tightened to the workpiece to a predetermined position of the bolt holding jig and holding the bolt in the bolt holding jig; and a bolt holding jig to which each bolt to be tightened to the workpiece is supplied. a bolt tightening means for detaching each bolt from the bolt holding jig held in the jig holding part and tightening it to the workpiece; and a jig transfer means for transferring the bolt holding jig from the tenth jig holding part to the second jig holding part.

Further, a second aspect of the present invention is a device for tightening a plurality of types of bolts on each workpiece that is sequentially conveyed and positioned at a predetermined position, the bolts to be tightened on each workpiece being freely attached and detached to the predetermined position. A pair of bolt holding jigs that can be held in place, and a first jig holding part that removably holds one of the bolt holding jigs, and a predetermined position of the bolt holding jig held in the jig holding part. a bolt supplying means for supplying each bolt to be tightened to a workpiece to be next positioned at the position and holding the bolt holding jig; and a second jig holding part for detachably holding the other bolt holding jig. The bolt holding jig held in the jig holding part holds each bolt to be tightened on the currently positioned work, and the bolts are supplied to the one bolt holding jig in parallel with the bolts being supplied to the one bolt holding jig. Bolt tightening means for removing each bolt from the other bolt holding jig and tightening it to the positioned workpiece, and bolt tightening work to the positioned workpiece and tightening to the one bolt holding jig. The present invention is characterized by comprising a jig transfer means for exchanging and transferring both bolt holding jigs between both jig holding parts after completion of bolt supply work.

(Operation) According to the first aspect of the present invention, a plurality of types of bolts to be tightened to the workpiece are placed in a predetermined position of the bolt holding jig held in the first jig holding part by the bolt supplying means. After being supplied to the position and once held by the bolt holding jig, the jig transfer means supplies the bolt together with the bolt holding jig to the bolt tightening means, and the bolt tightening means Each bolt is taken out from the bolt holding jig and tightened to the workpiece.

Therefore, when the bolt tightening means receives the bolt to be tightened to the workpiece, it is only necessary to remove the bolt holding jig from the jig transfer means, and after receiving the bolt, the bolt holding jig is held in the bolt holding jig. It is only necessary to tighten each bolt to the workpiece.

Further, according to the second aspect of the present invention, each bolt to be tightened to each workpiece positioned at the predetermined position 1 is supplied to the bolt tightening means in the same way as in the first aspect. This is done through a jig. In this case, a bolt holding jig is also held in the first jig holding part of the bolt supplying means when the bolt tightening means tightens the bolt on the positioned workpiece, In parallel with the bolt tightening work to the workpiece, each bolt to be tightened to the next positioned workpiece is supplied by the bolt supply means to the bolt holding jig held in the tenth jig holding part. . After this, the empty bolt holding jig on the bolt tightening means side and the bolt holding jig supplied with bolts on the bolt supply means side are transferred by the jig transfer means to the two jigs, respectively. Bolt tightening work to a newly positioned workpiece that has been exchanged and transferred between holding parts, and work to supply bolts to be tightened to the next positioned workpiece to the bolt holding jig on the bolt supply means side. repeated in parallel.

(Example) An example of the bolt tightening device of the present invention will be described with reference to FIGS. 1 to 5. Fig. 1 is a plan view of the entire bolt tightening device, Fig. 2 is a partially enlarged view of Fig. 1, and Fig. 3 is an I of Fig. 1.
4 is a sectional view taken along the line II--III, FIG. 4 is a sectional view taken along the line TV-TV in FIG. 1, and FIG. 5 is a sectional view taken along the line ■-V in FIG.

In Fig. 1, 1.1 is a pair of bolt holding jigs that can detachably hold multiple types of bolts B to be fastened to the workpiece W;
2 is a bolt supplying means for removably holding one bolt holding jig 1 and supplying the bolt B to be tightened to the workpiece W to the bolt holding jig 1; The other supplied bolt holding jig 1 is held detachably, and the bolt B held by the bolt holding jig 1 is
Bolt tightening means 4 tightens both bolt holding jigs 1 and 1 to the work W, bolt supply means 2 and bolt tightening means 3
This is a jig transfer means for exchanging and transferring between.

The bolt supply means 2 and the bolt tightening means 3 are provided facing each other across the conveyance path C of the workpieces W, and each of the workpieces W
is supported at a predetermined position on a pallet D that is transported on a transport path C via a transport jig (not shown), and is sequentially transported and positioned between the bolt supply means 2 and the bolt tightening means 3.

Each bolt holding jig 1 has, as shown in FIGS. 1 to 3,
A plurality of bolt clampers 6 are provided which extend radially from the substantially disc-shaped core part 5 at equal intervals, and each bolt clamper 6
consists of a pair of lamp pieces 6a, 6b that can be opened and closed, and a C-shaped spring 7 that is engaged with the clamp pieces 6a, 6b to urge them toward the closing side. Each bolt holding jig 1 holds each type of bolt B to be tightened to each work W at a position where the neck of the bolt B is positioned between the tip portions of the clamp pieces 6a and 6b of each bolt clamper 6 according to the type. and hold it in a position parallel to the axis of the core 5, and at this time,
These bolts B are arranged concentrically around the axis of the core portion 5 at equal intervals.

As shown in the first diagram, the bolt supplying means 2 includes a plurality of bolt storages 9 in which bolts B to be fastened to the workpiece W are stored for each type so that the bolts can be delivered from their delivery ends by a first shoot rail 8, and each A horizontal feeder 11 that horizontally supplies various kinds of poles) B dispensed from the bolt storage 9 to the dispensing end of the second shoot rail 10 connected to each first shoot rail 8, and holds each bolt holding jig 1. , and a bolt feeder 12 that feeds and holds each bolt B supplied to each bolt clamper 6 up to the dispensing end of each second shoot rail 1o. These are the conveyor C
It is arranged on a base 13 fixed to the side of the. In this case, the bolt feeder 12 is provided on the base 13 at a position near the conveyance path C, and each set of the first shoot rail 8 and the second shoot rail 1° extends toward the bolt feeder 12. They are arranged at equal intervals in the longitudinal direction of the conveyance path C.

As shown in the third figure, each bolt storage 9 supports the first shoot rail 8 on a base 14 extending parallel thereto via a plurality of supports 15, and has a plurality of bolts B of the same type on its head. It is slidably supported and housed on the first shoot rail 8 via a section. Each bolt storage 9 has a base 14 fixed on a support base 13.
Each bolt B is inserted and removably inserted diagonally downward into the upper part of the housing 6, and each bolt B is slid diagonally downward naturally on the first shoot rail 8 toward its dispensing end. ) B is dispensed from the dispensing end. In this case, as shown in FIGS. 1 and 3, each bolt storage 9 is moved from the tip of a swinging arm 18 that is swingably provided around a support shaft 17 at a position near the dispensing end thereof. 1st
A gate 19 is provided extending across the top side of the shoot rail 8, and the gate 19 is connected to the swing arm 1.
Each bolt B can be ejected in a state where it is swung together with the first shoot rail 8 and separated from the first shoot rail 8.

As shown in the third diagram, the horizontal feeder 11 horizontally feeds each second shoot rail 1O via a support 21 onto a vibrator 2o fixed on a base 13 at a position where it connects to the first shoot rail 8. By supporting and vibrating each second shoot rail IO back and forth with the vibrator 2o, the poles 1-B that are delivered from each bolt storage 9 to the second shoot rail 10 are delivered to the second shoot rail IO. The supply is made horizontally to the ends. Then, the horizontal feeder 11 is
An extension body 22 is provided extending from the rear end of the support body 21 toward each bolt storage 9, and when each bolt storage 9 is inserted into the support base 16, the extension 22 is provided. By swinging the swinging arm 18 via the iron 23, the gate 19 is separated from the first shoot rail 8, and each bolt B is discharged from the first shoot rail 8 to the second shoot rail 10. .

Further, as shown in FIGS. 1 and 3, each of the second shoot rails 10 extends from the tip of a swinging piece 25 that is swingably provided around a support shaft 24 at a position near the dispensing end of the second shoot rail 10. Second
A gate 26 is provided extending across the upper surface of the shoot rail 10, and the rear end of the swinging piece 25 is pushed downward to swing the gate 26 together with the swinging piece 25. Each bolt B can be ejected from the ejecting end of the second shoot rail 10 in a state where it is separated from the upper surface.

As shown in FIG. 2 and FIG.
The chute rail 10 is moved by the first moving cylinder 28 fixed to the base 13 on the rail 27.27 laid above.
A first moving part 29 is moved in parallel directions, and a second moving cylinder 31 fixed to the first moving part 29 moves each of the first moving parts 29 on a rail 30.30 laid on the first moving part 29. 2
A second moving part 32 that is moved toward the dispensing end of the shoot rail 10, and a rotation cylinder that is rotatably inserted into the upper part of the second moving part 32 and fixed to the second moving part 32. 33, and a jig holding part 35 which is rotated only in one direction by a predetermined rotation angle via a one-way clutch mechanism 34, and each of the bolt holding jigs 1 is protruded from the lower surface of the core part 5. The jig holding part 350 is held concentrically and rotatably in a horizontal position on the jig holding part 35 through the pins 36 .
Each bolt clamper 6 of the bolt holding jig 1 is directed toward the dispensing end of the second shoot rail 10 every time the bolt holding jig 1 is rotated by a predetermined angle.

The bolt feeder 12 also includes a horizontal base 3B that is fixed on a support 37 that is integrally and movably erected on the first moving part 28. Pressure that presses the rear end of the swing piece 25 via the bushing rod 39 when the bolt holding jig 1 held by the section 35 is moved together with the first moving section 29 to a position facing each second shoot rail 10. In order to detect the size of each bolt B to be supplied to the cylinder 40 and the bolt holding jig l, and the presence or absence of a washer, the photoelectric switch 41 is lowered toward the bolt B supplied to the dispensing end of each second shoot rail 10. A lifting cylinder 42 is fixedly installed.

This bolt feeder 12 moves the bolt holding jig 1 held by the jig holding part 35 to the first position by the first moving cylinder 28.
While sequentially moving each second shoot rail 10 to a position facing the dispensing end via the moving part 29, for each movement,
The bolt holding jig 1 is sequentially rotated by the rotation cylinder 33 via the jig holding part 35 to a position where each bolt clamper 6 faces the dispensing end of each second shoot rail 10. At this time, the bolt feeder 12 moves the swinging piece of the second shoot rail 10 through the bushing rod 39 by the pressing cylinder 40 at a position where each bolt clamper 6 faces the dispensing end of each second shoot rail 10. 25 to move the gate 26 away from the upper surface of the second shoot rail 10, and move the photoelectric switch 41 to the second shoot rail 1 using the lifting cylinder 42.
0 towards the bolt edge of the dispensing end to detect its size and the presence or absence of the one-shaft, and after that,
By moving the bolt clamper 6 of the bolt holding jig 1 together with the second moving part 32 toward the bolt B by the second moving cylinder 31 to hold the bolt B in the bolt clamper 6, and repeating this process, Each bolt B to be tightened to the workpiece W is held by each bolt clamper 6 of the bolt holding jig 1.

In FIG. 3, reference numeral 43 denotes a lock for positioning the bolt holding jig 1 at a position where each bolt clamper 6 of the bolt holding jig 1 faces each second shoot rail 9 when the bolt feeder 11 is operated. A cylinder 44 is a switching mechanism that switches the amount of understitching of the photoelectric switch 41 according to the type of bolt B.

As shown in FIGS. 1 and 5, the bolt tightening means 3 includes a movable base 46 that is attached to an arm portion 45a of a three-axis robot 45 and is movable vertically and horizontally;
A first ascending base 49 and a second ascending base 50 are attached to the movable base 46 so as to be able to be raised and lowered by a first ascending cylinder 47 and a second ascending/lowering cylinder 48, respectively, and a fixed base fixed to the movable base 46. a base 51 , a bolt gripping device 52 fixed to the lower surface of the first elevating base 49 , a bolt runner 53 fixed downward to the second elevating base 50 , and a fixed base 51 A jig holding device 54 is fixed to the jig holding device 54 via a fixing portion 52.

The jig holding device 54 includes a jig holding portion 55 having the same configuration as the jig holding portion 35 of the bolt feeder 12 rotatably supported by the fixed portion 52, and each The bolt holding jig 1 is integrally held rotatably, and the bolt holding jig 1 is sequentially rotated at each predetermined rotation angle by a rotating cylinder 56 fixed to a fixed base 51 via a one-way clutch mechanism 57. He is trying to rotate it together with the jig holding part 55. In this case, the bolt holding jig 1 supported by the jig holding part 55 is attached to the jig of the bolt supplying machine 12 after the bolt B to be tightened is supplied to the workpiece W by the bolt supplying means 2 as described above. It is transferred from the holding section 35 by the jig transfer means 4 as described later.

The bolt gripping device 52 includes a moving part 59 that is horizontally moved toward the bolt clamper 6 of the bolt holding jig 1 on the jig holding part 55 by a moving cylinder 58 fixed to the first elevating base 49; A pair of gripping arms 61, 61 are vertically opened and closed from the tip of the moving part 59 and are opened and closed by an opening/closing cylinder 60 fixed to the moving part 59. The body of each bolt B is detachably gripped at the lower end. Then, the bolt gripping device 52 moves the gripping arm 61.6 toward the bolt B held by the bolt clamper 6 of the bolt holding jig 1 on the jig holding part 55 by the moving cylinder 58.
1 is moved together with the moving part 59, and the gripping arm 61.61 is moved by the operation of the opening/closing cylinder 60 of the body of the pole I-B.
By holding the gripping arm 61.61 in between and retracting the gripping arm 61.
is detached from the bolt holding jig 1.

The bolt tightening means 3 is connected to the rotating cylinder 5 of the jig holding device 54 in a state where the bolt holding jig l holding the bolt B to be tightened to the workpiece W is supported by the jig holding part 55.
6 rotates the bolt holding jig 1 at predetermined rotation angles via the jig holding part 55, and each pole B held by each bolt clamper 6 of the bolt holding jig 1 is rotated by the bolt holding device 55. 52 gripping arms 61, 61 in sequence. At this time, at a position where each bolt B faces the gripping arm 61, 61, the bolt B is
1. Grip between 61 and remove from bolt holding jig 1,
After the detachment, the bolt gripping device 52 is moved by the three-axis robot 45 via its arm portion 45a and the movable base 46 above the part of the workpiece W where the bolt B is to be tightened, and then the first lifting The gripping arm 61.61 is lowered toward the workpiece W via the first ascending base 49 by the cylinder cylinder 47, and the bolt B gripped by the gripping arm 61.61 is moved as shown by the imaginary line in FIG. By loosely inserting the bolts into the tightened portions and repeating this process, all the bolts B held by the bolt holding jig 1 are loosely inserted into the work W.

After this, the bolt tightening means 3 moves the nut runner 53 to its arm portion 45a using the three-axis robot 45.
The nut runner 53 is moved directly above each bolt B loosely inserted into the workpiece W via the movable base 46, and at this time, the nut runner 53 is moved via the second elevating armrest 50 by the second elevating cylinder 48. is lowered toward the bolt B, and the socket 62 inserted into the tip of the bolt B is inserted into the bolt B, and then the nut runner 53 lowers the bolt B.
is tightened to the workpiece W, and by repeating this process, all the ports B loosely inserted into the workpiece W are tightened to the workpiece.

In addition, in Fig. 1, 63 is the bolt B to be tightened to the workpiece W.
cD This is a socket holding device that detachably holds a plurality of types of sockets 62 in order to replace the sockets 62 of the nut runner 53 according to the types, and this socket holding device 63 is installed at the tip of the base 13. A plurality of socket grips 68 are mounted on a movable base 66 that is moved by a moving cylinder 65 on a rail 64 that is opened and closed by an opening/closing cylinder 67.
, and holds various sockets 62 in the socket gripping portion 68. When replacing the socket 62, the socket gripping part 68 is moved to an appropriate position by the moving cylinder 65, and the NAND runner 53 is moved toward the socket holding device 63 by the three-axis robot 45. After the already inserted socket 62 is gripped by the socket gripping portion 68 to be gripped and removed from the nut runner 53, a new socket 62 is inserted into the nut runner 53, and the socket 62 is removed. is detached from the socket gripping portion 68 that grips the socket.

The jig transfer means 4, as shown in FIGS. 1 and 4,
a fixed base 70 fixed on a support 69 erected on the base 13 at a point where the supply of bolts B to the bolt holding jig 1 by the bolt supply means 2 ends; The fixed base 7 is attached to the lower side of the fixed base 7 so as to be movable up and down.
A rotary actuator 72 that is raised and lowered by a lifting cylinder 7I that is fixedly installed at
2, and a pair of gripping arms 74 and 74 that are vertically disposed on both sides of the rotation base 73 and can be opened and closed. Each jig grip part 75 is provided with a jig grip part 75, 75, and each jig grip part 75 is provided protrudingly from the upper surface of the core part 5 of each bolt holding jig between its grip arms 74, 74, as shown in the fourth figure. The protrusion 76 is detachably gripped.

In this case, as shown in the fourth diagram, one of the jig gripping parts 75 and 75 is held by the jig holding part 35 at the time when the bolt supply means 2 finishes supplying the bolt B to the bolt holding jig 1. At this time, the bolt tightening means 3 is located directly below the other jig gripping part 75.
The bolt holding jig l held by the jig holding part 55 is moved by the three-axis robot 45 after the bolt tightening is completed.

In this state, the jig transfer means 4 uses both jig gripping parts 75 and 75 to hold the respective gripping arms 74 and 74.
grip both bolt holding jigs 1, 1 through the
Both bolt holding jigs 1. 1 to both jig holding parts 3
5.55, the rotary actuator 72 moves the two jig grips 75.
75 is reversed 180 degrees, and after the reversal, the lifting cylinder 71
The both jig gripping parts 7575 are moved again by the both jig holding parts 35.
55 to support both bolt holding jigs 1, 1 on both jig holding parts 35.55, thereby exchanging both bolt holding jigs 11 between both jig holding parts 35.55. I'm trying to transfer it.

Next, the operation of the entire bolt tightening device will be explained with reference to FIGS. 1 and 3.

The workpiece W to be tightened with Pol I-B is the bolt supply means 2.
When the bolt supply means 2 is carried between the bolt tightening means 3 and the bolt tightening means 3, the bolt supply means 2 has one bolt holding jig 1 (hereinafter referred to as the first bolt holding jig 1 for explanation) in its jig holding part 35.
The first bolt holding jig 1 supplies and holds the bolt B to be tightened to the work W as previously described, and the jig holding part 35 is held as shown by the phantom line in FIG. together with the first bolt holding jig 1 and the jig transfer means 4
Stop below.

On the other hand, at this time, the bolt tightening means 3 is
5 is the other bolt holding jig 1 (hereinafter, the second bolt holding jig 1 is used for explanation)
The bolt holding jig 1) is held, and after the bolt tightening work on the work W that was brought in earlier is completed, the third
As shown in line g in the drawing, the jig holding portion 55 is removed from the empty second
Together with the bolt holding jig 1, it is moved below the jig transfer means 4 by the three-axis robot 45 and stopped.

Then, in parallel with the carrying in of the work W, the jig transfer means 4 exchanges and transfers both bolt holding jigs 1, 1 between both jig holding parts 35°55 as described above, and thereby , the first bolt holding jig 1 holding the bolt B to be tightened to the workpiece W is held in the jig holding part 55 of the bolt tightening means 3, and the empty second bolt holding jig l is held in place. It is held by the jig holding part 35 of the supply means 2.

Next, when the workpiece W is positioned, the bolt tightening means 3 inserts each pole B held by the first bolt holding jig 1 into the workpiece W and tightens it, as described above.
The bolt supply means 2 supplies the bolt B to be tightened to the workpiece W to be carried in next with the second bolt holding jig 1 as described above.
These operations are then repeated.

(Effects) As is clear from the above description, according to the first eleventh aspect of the bolt tightening device of the present invention, multiple types of bolts to be tightened to the workpiece are once supplied to the bolt holding jig by the bolt supply means. and then supplying the bolt together with the bolt holding jig to the bolt tightening means by the jig transfer means,
The bolt tightening means is used to remove each bolt from the bolt holding jig and tighten it onto the workpiece, thereby providing the bolt tightening means with multiple types of bolts to be tightened on the workpiece. can be carried out efficiently all at once, and the operation of the bolt tightening means during the supply operation can be simplified, and its operation range can be made relatively small, so that it can be made smaller. At the same time, it is possible to reduce the load on the drive device that drives the bolt tightening means.

Moreover, the second j! of the present invention! ! According to the method, a pair of bolt holding jigs are provided and these are held in a jig holding part of a bolt supply means and a jig holding part of a bolt tightening means, respectively,
In parallel with the bolt tightening work to the workpiece by the bolt tightening means, the bolt for the workpiece to be next bolted tightened is supplied to the bolt holding jig and held by the bolt supply means, and these bolts are held by the bolt holding jig. After the work is completed, both bolt holding jigs are exchanged and transferred between both jig holding parts by the jig transfer means, and the above work is repeated, thereby achieving the same effect as the first aspect. In addition, as the workpieces are sequentially transported and positioned, the bolts to be tightened on each workpiece can be quickly and quickly supplied to the bolt tightening means, making it possible to continuously tighten the bolts on each workpiece. It can be done efficiently.

[Brief explanation of drawings]

Fig. 1 is a plan view of the entire bolt tightening device of the present invention, Fig. 2 is a partially enlarged view of Fig. 1, Fig. 3 is a sectional view taken along the line ■-m of Fig. 5 is a cross-sectional view taken along line IV-4V in FIG. 1, and FIG. 5 is a cross-sectional view taken along line V-V in FIG. 1... Bolt holding jig 2... Bolt supply means 3... Bolt tightening means 4... Jig transfer means 35... First bolt holding part 55... Second bolt Holding part W...Work B...Bolt

Claims (1)

[Claims] 1. A bolt holding jig that is a device for tightening multiple types of bolts to a workpiece positioned at a predetermined position, and is capable of detachably holding each bolt to be tightened to the workpiece at a predetermined position. and a first jig holding part that detachably holds the bolt holding jig, and supplies each bolt to be tightened to the workpiece to a predetermined position of the bolt holding jig held by the jig holding part. and a second jig holding part for detachably holding the bolt holding jig supplied with each bolt to be tightened to the workpiece, and a second jig holding part for detachably holding the bolt holding jig. a bolt tightening means for detaching each bolt from a bolt holding jig held in a part and tightening it to the workpiece; A bolt tightening device comprising a jig transfer means for transferring the jig to a jig holding section. 2. A device for tightening multiple types of bolts on each workpiece that is sequentially transported and positioned at a predetermined position, and includes a pair of bolt holding jigs that can detachably hold each bolt to be tightened on each workpiece in a predetermined position. and a first jig holding part that removably holds one of the bolt holding jigs, the workpiece being next positioned at a predetermined position of the bolt holding jig held by the jig holding part. a bolt supply means for supplying each bolt to be tightened to the bolt holding jig and holding the bolt holding jig; and a second jig holding part for detachably holding the other bolt holding jig; With the held bolt holding jig holding each bolt to be tightened on the currently positioned workpiece, each bolt is supplied from the other bolt holding jig in parallel with the supply of bolts to the one bolt holding jig. bolt tightening means for removing and tightening the bolt onto the positioned work; and bolt tightening means for holding both bolts after the bolt tightening work on the positioning work and the bolt supply work to the one bolt holding jig are completed. A bolt tightening device comprising a jig transfer means for exchanging and transferring a jig between both jig holding parts.