JPS624454Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a bolt tightening device for tightening bolts continuously supplied from a magazine.

Conventionally, various tightening devices have been proposed to efficiently tighten a large number of bolts. However, conventional tightening devices can generally only be applied to small bolts and screws, which limits their applications, and they are also heavy, which can lead to early fatigue of workers, and it is troublesome to replenish bolts. It was hot.

This invention was made with the aim of eliminating such drawbacks, and by providing a bolt tightening device with a simple configuration that can continuously tighten even relatively large bolt faces, it is possible to perform bolt tightening work efficiently. This is what I did.

This invention will be described in detail below with reference to an illustrated embodiment. In the figure, reference numeral 1 denotes a main body that houses an impact wrench 2 therein, has handles 3 on the rear and front sides, and has a magazine 4 removably attached to its lower part. The magazine 4 has a flat box shape and has a housing part 6 that can accommodate a large number of bolts 5 in a row, and this housing part 6 is a head housing part that stores the heads 5a of the bolts 5. 6a, a washer accommodating part 6b for accommodating the washer 7 fitted into the neck of the bolt 5, and a threaded part accommodating part 6c for accommodating the threaded part 5b of the bolt 5. Further, the front end of the magazine 4 is provided with an engaging stepped portion 4a that removably engages with a stepped portion 8a of a bolt guide portion 8 provided at the front portion of the main body 1, and a drop prevention claw 9. The fall prevention claw 9 prevents the bolt 5 inside the magazine 4 from falling off when the magazine 4 is removed from the main body 1, and the middle part is attached to the pin 1 as shown in FIG.
0 is rotatably supported by a part of the magazine 4, and when the magazine 4 is removed from the main body 1, one end of the fall prevention claw 9 is moved to the housing part 6 by the action of the leaf spring 11.
It protrudes inward to prevent the bolts 5 in the housing section 6 from falling off, and when the magazine 4 is attached to the main body 1, the other end of the fall prevention claw 9 is pushed against the side wall 8b of the bolt guide section 8. The opposite side retracts from the accommodating portion 6, and the bolts 5 can be supplied from the inside of the magazine 4 to the bolt guide portion 8.

On the other hand, the rear end of the magazine 4 is detachably engaged with a holding member 11 provided at the rear of the main body 1. The holding member 11 is urged forward by a compression spring 12, and locks the rear end of the magazine 4 with a stepped portion 11a, and the main body 1 is provided with a lock pawl 13. This lock pawl 13 is a pressing body 1 that moves the head accommodating portion 6a in the magazine 4 in the front and back direction.
4 to the standby position, and a notch 13 that engages with a lock pin 14a protruding from the pressing body 14.
a (see Fig. 4), and can be unlocked by manually rotating the lock pawl 13. Further, one end of a constant spring 16 housed in the front part of the main body 1 is fixed to the pressing body 14, and when the lock claw 13 releases the lock, the constant spring 16 acts to move the head inside the head accommodating portion 6a. The bolt 5 accommodated in the housing section 6 of the magazine 4 is pushed forward of the main body 1. The bolt 5 pressed by the pressing body 14 passes through the arcuate guide path 8c in the bolt guide section 8 connected to the front end of the magazine 4, and passes through the main body 1.
It reaches the bolt supply section 17 at the front. The bolt supply section 17 includes a torsion bar 19 whose one end is connected to the drive shaft 2a of the impact wrench 2 which can be moved forward and backward by an air cylinder 18, and which is fitted into the torsion bar 19 and urged forward of the main body 1 by a compression spring 20. A socket 23 containing magnets 22a and 22b is connected to the tip of a torsion bar 19 protruding from the front end of the sleeve 21 by a pin 24. Further, at the opening of the guide path 8c that opens toward the bolt supply section 17 side, there is provided a separation lever 26 whose proximal end is pivotally supported by a pin 25 and whose distal end is movable up and down. A positioning pawl 27 and a bolt holding pawl 28 are provided above to position the bolt 5 loaded into the bolt supply section 17 from the guide path 8c.

Therefore, when tightening the bolts 5, first attach the magazine 4 containing a large number of bolts 5 to the main body 1, and while holding the main body 1 by the handle 3, press the cylinder drive lever 29 provided near the rear handle 3. do. As a result, air is supplied to the rod side of the air cylinder 18, and the socket 2 of the bolt supply section 17 is
3 is moved back together with the torsion bar 19, sleeve 21, etc. When the socket 23 has been completely retracted, the lock pawl 13 is rotated by a handle (not shown) to unlock the pressing body 14. This results in
The pressing body 14 presses the bolts 5 in the magazine 4 forward, and the first bolt 5 passes through the bolt guide section 8 and reaches the bolt supply section 17. The first bolt 5 that has reached the bolt supply section 17 is loaded into the bolt supply section 17 by pushing up the separation lever 26 to the position indicated by the broken line in FIG.
The center of the bolt 5 is positioned to coincide with the center of the socket 23 by the positioning lever 27 and the bolt holding pawl 28. Next, when the pressure on the cylinder drive lever 29 provided near the rear handle 3 is released, air is supplied to the bottom side of the air cylinder 18, and the socket 23 is moved forward while being slowly rotated by the impact wrench 2. The tip of the stopper 26 pushes down the tip of the stopper 26 to the solid line position in FIG. 1, thereby blocking the succeeding bolt 5. Thereafter, the socket 23 is fitted into the head 5a of the bolt 5 positioned in the bolt supply section 17, and the magnet body 22 in the socket 23 is fitted.
The bolt 5 is sucked and held by the bolts a and 22b, and is further advanced in this state, so that the bolt 5 and the socket 23 are projected from the tip of the main body 1. Main body 1
When the tip of the bolt 5 protrudes, insert the tip of the bolt 5 into the screw hole of the object to be tightened, press the impact wrench operating lever 30 provided near the rear handle 3, actuate the impact wrench 2, and tighten the bolt 5. Tighten. After tightening bolt 5,
Press the cylinder drive lever 29 again to close the socket 2.
Move 3 back. When the socket 23 passes over the separation lever 26, the next bolt 5 pushes up the separation lever 26 and is automatically loaded into the bolt supply section 17, so by releasing the pressure on the cylinder drive lever 29 in this state, , the next bolt 5 with the above operation
can be tightened. By repeating the above operation thereafter, the bolts 5 accommodated in the magazine 4 can be continuously tightened, and the magazine 4 can be tightened continuously.
When all the bolts 5 in the magazine 4 have been tightened, replacing the magazine 4 with a new one allows a large number of bolts 5 to be tightened efficiently.

In the above embodiment, the bolt 5 with the washer 7 inserted is
Although the case of tightening the bolt 5 has been described, it is of course also possible to tighten only the bolt 5. Further, since the torsion bar 19 is provided between the impact wrench 2 and the socket 23, the tightening quality can be improved.

As detailed above, this idea allows bolts to be fed to the main body using a magazine that can be attached to and removed from the main body, making it possible to feed large bolts compared to conventional feeders that use pneumatic pressure. Not only is this possible, but the entire structure can be made smaller and lighter than a feeder. In addition, it is possible to tighten the bolt with the washer attached, and since the bolt is tightened with the socket protruding from the tip of the main body, it is possible to tighten the bolt sufficiently as long as there is space for tightening with an impact wrench, nut runner, etc. Therefore, unlike conventional tightening devices, the range of use is less likely to be limited. Moreover, the reduction in size and weight reduces worker fatigue, which improves work efficiency.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with FIG. 1 being a longitudinal sectional view, FIG. 2 being a rear view, and FIG. 3 being a view from FIG.
4 is a detailed view of the lock pawl portion, FIG. 5 is a sectional view taken along the line of FIG.
The figure is a sectional view of the magazine. 1 is the main body, 2 is an impact wrench, 4 is a magazine, 5 is a bolt, 17 is a bolt supply section, 23 is a socket, and 26 is a stopper.

Claims (1)

[Scope of utility model registration request] A magazine 4 containing a large number of bolts 5 is removably attached to a main body 1 in which an impact wrench 2 is installed, and the bolts 5 in this magazine 4 are pushed in front of the main body 1 by a pressing body 14 which is biased by a biasing means. positioning means for sequentially supplying the bolts to the bolt supply section 17 of the section and positioning the bolts 5 loaded from the magazine 4 at a predetermined position, and a separation lever 26 for separating the succeeding bolts 5; Connect the socket 23 connected to the impact wrench 2 to the tip of the main body 1 and the separation lever 26.
A bolt tightening device comprising means for moving the bolt forward and backward between the rear of the bolt.