JPH0741361B2 - Barrage riveter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous rivet capable of continuously striking blind rivets (hereinafter referred to as rivets) for crimping sheet metal or the like.

[0002]

2. Description of the Related Art A conventional riveter is disclosed in, for example, Japanese Patent Laid-Open No. 61-61.
As disclosed in Japanese Laid-Open Patent Publication No. -78526, when the rivet is set, the shaft portions of the blind rivets are inserted one by one from below the nose piece, and after the rivet setting, the cut shaft of the blind rivet is set as the rivet. It was designed to be ejected from the top.

However, in the above riveter,
Since each rivet had to be mounted one by one, it was troublesome and the rivet shaft was scattered. Therefore, the applicant has been able to automatically supply rivets as shown in Japanese Patent Application No. 3-152150 filed on May 29, 1991, and to prevent scattering of broken rivet shafts. I applied for a riveter.

The continuous riveter is shown in FIGS.
As shown in FIG. 1, a main body A, a drive unit B, and a rivet supply unit C
It consists of FIG. 14 is an overall view of a combination of FIG. 12 and FIG. 13 in a state where the lever of the continuous riveter is released.

The combination of FIGS. 14 and 16 and the combination of FIGS. 15 and 16 are general views of the state in which the lever of the continuous riveter is gripped, respectively, and the piston position in the air cylinder shown in FIG. The position of each piston and blind rivet changes from FIG. 14 to FIG.

The drive unit B has a small-diameter oil cylinder 12 branched laterally from the main body A and a large-diameter air cylinder 1, and a tip of a piston rod 3 of a piston 2 housed in the air cylinder 1. Oil chamber 1 of the oil cylinder 12
2a is slidably fitted.

A shaft hole 41 communicating with the air supply port 40 at the lower rear end and the valve chamber 44 is provided in the lower portion of the air cylinder 1. Large diameter portions formed at the front and rear ends of the shaft hole 41 communicate with the communicating holes 42, 4.
3 communicates with the inside of the air cylinder 1. The valve shaft 6 is slidably accommodated in the shaft hole 41. The valve 8 is fixed to the rear end of the shaft hole 41 and the plug 70 for closing the shaft hole 41 is formed at the front end portion. The valve shaft 6 is biased forward by a spring 25.

Below the front ends of the oil cylinder 12 and the air cylinder 1, an operating lever 9 and a valve cam 10 are provided.
Spring pins 45, 4 which urge them clockwise
6 and the operating lever 9 and the valve cam 10 are attached at their upper ends to spring pins 47, 4 respectively.
They are connected by a connecting rod 11 pivotally attached at 8. The tip of the valve cam 10 is in contact with the front surface of the stopper 70 of the valve shaft 6.

In the main body A, a tubular rivet nose 18 is connected via a chuck cylinder 73 to a lower portion of a pneumatic hydraulic cylinder 5 formed integrally with the oil cylinder 12. Inside the air hydraulic cylinder 5, an air hydraulic piston 13 which defines the air hydraulic cylinder 5 into an upper air chamber 5b and a lower oil chamber 5a is accommodated.
A cylindrical body 13a is integrally formed in the lower part of the unit 3. The air chamber 5b communicates with the air chamber 72 formed in the rear portion of the valve chamber 44 of the drive unit B via the pipe 71, and the oil chamber 5a communicates with the oil chamber 12a of the oil cylinder 12. is doing.

Inside the chuck cylinder 73, a hollow chuck piston 7 having a cylindrical body 74 integrally formed in the lower portion thereof is formed.
5 are accommodated. Further, a coil spring 76a is provided inside the cylinder 13a of the pneumatic hydraulic piston 13, and a rod 76 biased downward by the coil spring 76a is extensible from the lower wall of the cylinder 13a. The chuck piston 75 is attached to the tip of the rod 76.
A hollow jaw case 77 that is slidably fitted to the cylindrical body 74 is attached.

On the inner surface of the tip of the jaw case 77, there is provided a tapered surface 78 having a smaller diameter toward the tip, and a pair of jaws 14 are slidably fitted to the tapered surface 78. Each jaw 14 is urged downward and outward by a spring 79 housed in a jaw case 77 via a sharp jaw pusher 80. The lower end of the cylindrical body 74 is closed except for the shaft hole of the shaft center, and in the state of FIGS. 9 and 13, its lower wall 7 is closed.
The tips of the jaw case 77 and the jaw 14 are in contact with 4a.

An air chamber 81 below the chuck piston 75 in the chuck cylinder 73 communicates with a ventilation port 82 provided at the front end portion of the air cylinder 1 of the drive section B via a pipe line 83. Also, as shown in FIG. 20, a pair of nose pieces 19 are rotatably provided inside the lower end of the rivet nose 18 by pins 50, 50, and by springs 29, 29 accommodated at the tip ends of the pair of set screws 51. They are urged inwardly toward each other.

Reference numeral 53 in FIG. 20 is a passage hole for a rivet 33, which will be described later, and 100 is a blind rivet holder, which will be described later. The blind rivet holder 100 is
It is made of polypropylene or the like and has a U-shaped cross section, and has feed holes 105d and upper and lower tabs 101, 101 at regular intervals.

The rivet supply section C has a tape air cylinder 58 and a guide plate 59 integrally attached to the side surface of the rivet nose 18 as shown in FIGS. 17 to 20, and inside the tape air cylinder 58. As shown in FIG. 17, a piston 22 biased forward by a spring 31 is housed, and the piston 22 has a feed pawl 23.
A shaft 23 having a (FIG. 18) is fitted and set with a screw 23b for retaining. The air cylinder 58 communicates with a port 81a above the chuck cylinder 73 of the main body A via a conduit 84 as shown in FIG. In FIG. 17 and FIG. 18, 58a is the conduit 8
4 is a port connected to.

A pair of upper and lower projections 60, 60 for guiding the blind rivet holder 100 are formed on the guide plate 59, and a long hole 61 (FIGS. 12, 14) for reciprocating the feed claw 23a. 15, FIG. 18 and FIG.
9) is open and a non-return pawl 59a is provided so as to project. 20 is a rivet holder pressing plate, which is attached to the rivet nose 18 via the pistons 21 and 21 and springs 30 and 30 for pressing the pistons 21 and 21, and the springs 30 and 30 mount the blind rivet holder 100. It is elastically pressed against the guide plate 59. A plate 30a is attached to the rivet nose 18 with screws (not shown), contacts the rear ends of the springs 30 and 30, and presses the springs 30 and 30 toward the pistons 21 and 21. Further, 34 is a blind rivet holder 100.
It is a storage case of. This storage case 34 is a guide plate 5
9 is formed in a cylindrical shape whose axial direction is perpendicular to the longitudinal direction,
The blind rivet holder 100 is wound along the cylindrical shape, and the blind rivet holder 100 is guided by the guide plate 5.
It is designed to be discharged according to 9.

The conventional continuous riveter operates as follows. Normally, when the blind rivet holder 100 is loaded in the storage case 34 of the continuous riveter and is in use,
In the state of FIG. 12, the operation lever 9 is released,
The rivet 33 pushes open the pair of nosepieces 19 and projects to the lower surface thereof.

In this state, first, the air supply port 40 is connected to a pressure air supply device (not shown), and then the tip of the rivet 33 is inserted into the hole of the sheet metal 63 as shown in FIG.
When is gripped, the valve cam 10 rotates counterclockwise via the connecting rod 11 as shown in FIG. 16, so that the valve shaft 6 and the valve 8 retract. This allows the compressed air to communicate with the communication hole 43.
As it enters the air cylinder 1 through the piston 2, the piston 2 moves forward and the oil in the oil chamber 12a is transferred to the main body A as shown in FIG.
And enters the oil chamber 5a to push up the pneumatic hydraulic piston 13 to the upper limit position.

Therefore, the rod 76 and the jaw case 77 ascend. In this case, since the pair of jaws 14 are urged downward by the spring 79 via the jaw pushers 80, they slide downward on the tapered surface 78 of the jaw case 77 and approach each other and approach the rivets 33. Ascending while grasping the shaft 33a. The rising of the shaft 33a causes the rivet 33 to be caulked, and then the tip of the nose piece 19 cuts the shaft 33a from the rivet 33.

When the advance of the piston 2 is completed (FIG. 16), the air in the air cylinder 1 is supplied from the ventilation hole 82 of the air cylinder 1 to the air chamber 81 through the conduit 83 (FIG. 15). Therefore, as shown in FIG. 15, the chuck piston 75 and the cylindrical body 74 rise, and at the time of this rising, the liner 74a in the cylindrical body 74 first contacts the tip of the chuck 14 and pushes it up, and then the jaw case 77 Contact the tip. Therefore, at this time, the jaw 14 is opened. Further, from this position, the cylindrical body 74 is further raised, and the jaw case 77 is
Rises while compressing the spring 76a, resulting in the state of FIG.

When the chuck piston 75 rises to the top dead center (FIG. 15), the compressed air that has entered the chuck cylinder 73 through the pipe 83 is supplied from the port 81a to the pipe 8.
4 through the tape air cylinder 58 of the rivet supply section C
(FIG. 18) (FIG. 18 is a sectional view taken along the line DD of FIG.
18 is a perspective view of the rivet supply section C excluding the storage case 34 in FIGS. 12, 14 and 15 as seen from the rear side), and the piston 22 is supplied in the arrow direction through the port 58a. The spring 31 moves in the direction (leftward in FIG. 15) while compressing, and the feed claw 23a at the tip of the shaft 23 moves rightward (leftward in FIG. 15) along the long hole 61. 10
The feed claw 23a engaged with the 0 feed hole 105 pulls out the blind rivet holder 100 from the storage case 34 and moves it by one pitch along the pair of ridges 60, 60 of the guide plate 59, and the rivet 33. The front end of the rivet is set at a predetermined position in the rivet nose 18 (FIG. 15).

Next, when the operating lever 9 is released, as shown in FIG.
As shown in FIG. 3, the valve cam 10 rotates clockwise through the connecting rod 11, so that the valve 8 is closed by the acting force of the spring 25, and the compressed air passes through the air chamber 72 and the pipe 71, as shown in FIG. Since it is supplied to the air chamber 5b of the hydraulic cylinder 5, the rod 76, the jaw case 77, the pneumatic hydraulic piston 13, the chuck piston 75, and the cylinder 74 are pushed down to the lower limit position. At that time, as shown in FIG. 10, the upper end of the shaft 33a of the rivet 33 enters between the pair of jaws 14 and abuts on the lower end of the jaw pusher 80.
Is pushed down. And a pair of nose pieces 1 at the bottom
After pushing 9 open, it projects to the lower surface and stops.

At this time, at the same time, the supply of the compressed air to the air cylinder 58 of the rivet supply section C is stopped, and the compressed air in the air cylinder 58 communicates with the atmosphere, so that the piston 22 moves leftward by the acting force of the spring 31 (see FIG. 18). ) (To the right in FIG. 12), but the holding tape 54 is stopped from moving to the left (FIG. 18) (to the right in FIG. 12) by the check claw 59a, so that the blind rivet holder 100 is In the stationary state, the feed claw 23a is disengaged from the feed hole 105d and
Moved to the front of the pitch, and the feed hole 105d in front (Fig. 12)
Engage with.

Although one rivet 33 has been crimped as described above, it is possible to continuously rivet by repeating the above operation. Also, the cut shaft 3
As shown in FIGS. 12, 14 and 15, 3a is a through hole 5 integrally formed with the blind rivet holder 100 while being inserted and held in the through hole of the blind rivet holder 100.
3 (FIG. 20) and are sequentially discharged.

When the blind rivet holder 100 of the storage case 34 becomes empty or when the blind rivet holder 100 is first loaded and the continuous rivet is used, the blind rivet is placed at the position shown in FIG. When the leading rivet 33 of the holding body 100 is positioned and then the lever 9 is gripped to raise the pneumatic hydraulic piston 13 and the chuck piston 75, one rivet 33 is fed at the same time. At this time, the lower end of the cylinder 74 below the chuck piston is in the position shown in FIG. 15, and the rivet 33 is also in the position shown in FIG.

Next, when the lever 9 is released, the hydraulic piston 1
Both the chuck 3 and the chuck piston 75 descend, and the state shown in FIG. 12 is reached. The rivet 33 pushes open the pair of nosepieces 19 and the head projects from the lower surface of the nosepiece 19 to complete the rivet caulking preparation. Subsequent operation is the same as previously described in the description of the operation of the repeating riveter.

[0026]

However, the continuous riveter has the following drawbacks. The length of the shaft 33a of the blind rivet 33 is usually a commercially available blind rivet (JIS, B46
27 Appendix, blind rivet for band riveters) longer than the shaft.

The used blind rivet shaft 33a is frictionally held in the holes of the upper and lower tabs 101, 101 of the blind rivet 100 as shown in FIGS. If
There is a drawback that the tip of the shaft sticks in your hand during handling, sticks out of the garbage bag, and is bulky. Further, since the blind rivet holder 100 is usually made of plastic such as polypropylene as described above, the shaft 33a is made of metal, so that it is difficult to separate the waste rivet holder in terms of waste treatment.

The present invention has been made in view of the above-mentioned circumstances, and uses a blind rivet that is usually commercially available, and a continuous riveter in which a used shaft is automatically stored in a case attached to the main body. It is provided.

[0029]

The present invention comprises a main body, a driving portion, a rivet supply portion, and a valve portion, wherein the main body is provided with a small hole through which the shaft of the blind rivet passes, and the upper end of the main body. A case in which the shaft of the blind rivet is housed is mounted, an ejector for vacuuming the inside of the case is mounted, a chuck cylinder provided with a hole through which a cylindrical body passes through a lower wall and a port at a lower portion, A jaw case piston that is internally mounted in the chuck cylinder and is slidably moved downward by a spring to a predetermined position in the upper part of the chuck cylinder and slidably moves, and a hollow connecting rod is erected on the lower surface; In a cylindrical shape, a small diameter piston at the tip of the connecting rod is elastically urged downward through a spring to be slidably inserted in the upper part of the cylinder, and a hole is formed at the tip. A jaw case having a tapered surface with a diameter smaller toward the tip on the inner surface of the end, and a jaw case piston inside the chuck cylinder. The cylinder body is integrally molded in the lower part, and the cylinder body is the chuck cylinder lower wall. Through the hole, the jaw case is slidably fitted into the cylindrical body, and the nose piston having a nose piece attached to the lower end is slidably fitted to the taper surface, and the nose piston is slidably fitted by a spring. A pair of jaws urged downward and outward via a sharpened jaw pusher,

The drive unit includes an air cylinder having an air piston built therein, and a piston rod of the air piston forms a high-pressure piston in an oil cylinder. A port below the bottom dead center of the jaw case piston is provided above the chuck cylinder. An oil cylinder communicating with the air cylinder, and an air chamber attached to the air cylinder to define an oil chamber and an air chamber in the front and rear via a low pressure piston, and communicate with the port at the base end of the oil cylinder at the retracted position of the high pressure piston. A hydraulic cylinder; ports provided at front and rear positions of the air cylinder; and ports provided at a piston retracted position of the pneumatic hydraulic cylinder,

The rivet supply unit has a blind rivet shaft slidably held at a fixed interval at a blind rivet holder at the top dead center of the jaw case piston and the nose piston on the axis of the tip of the nose piece. It has a structure to transfer,

The valve section includes a trigger valve which is a four-port two-position switching valve which is manually switched, one port on the outlet side of the trigger valve, and a port provided at the air piston front position of the air cylinder. And a control valve which is a 4-port 2-position pilot switching valve that is switched by pilot air pressure,

One of the outlet ports of the operation valve communicates with a port provided at a rear position of the air cylinder, and the other communicates with the vacuum ejector through a port at the lower end of the chuck cylinder, and the inlet of the trigger valve. One of the side ports communicates with the air pressure source and the other communicates with the exhaust side.One of the inlet ports of the switching valve communicates with the other of the outlet ports of the trigger valve and the other communicates with the exhaust side. One of the outlet ports of the valve communicates with a port provided at the rear of the tape air cylinder of the rivet supply unit, and a port provided at the front of the tape air cylinder communicates with a port at the rear of the pneumatic hydraulic cylinder. It is characterized by being

[0034]

Since the shaft of the used blind rivet is evacuated by the negative pressure generated by the vacuum ejector, it passes through the connecting rod and is housed in the case.

In the state where the operating lever (trigger) is released, that is, in the state where the rivet is ready to be hit, the jaw case is always pulled up by the spring at the lower end of the connecting rod, so that the jaw is tightened and the blind rivet is It is designed so that it cannot get out of the nosepiece.

The shaft of the blind rivet is located on the axial center of the tip of the nose piece when the jaw case piston and the nose piston reach the top dead center, and when the jaw case piston and the nose piston descend, the shaft becomes the nose piece. It is inserted into the split hole of the opened jaw.

As the nose piece descends, its tip descends to the bottom dead center while bending the tabs above and below the rivet holder and inclining them.

[0038]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a main body and a rivet supply section showing an embodiment of the present invention, showing a state in which a lever attached to a continuous rivet is released and a trigger valve is in a normal position, and FIG. FIG. 3 is a sectional view of a drive unit showing an embodiment, and FIG. 3 is a circuit diagram of a valve unit showing an embodiment of the present invention.

FIG. 4 is a view of a rivet supply section showing an embodiment of the present invention, showing a state in which the tape piston in the tape air cylinder moves and the rivet holder is fed by one pitch.
The combination of FIG. 1 to FIG. 4 shows the entire continuous riveter.

FIG. 5 is a sectional view of the main body showing one embodiment of the present invention and a view of the rivet supply section. The operation lever attached to the continuous riveter is gripped to switch the trigger valve, and the position of the operation valve is shown in FIG. 6 is a cross-sectional view of a drive unit showing one embodiment of the present invention, FIG. 7 is a circuit diagram of a valve showing one embodiment of the present invention, and FIG. 8 is one embodiment of the present invention. FIG. 3 is a diagram of a rivet supply unit showing an example, showing a state in which a tape piston in a tape air cylinder is returned by an elastic force of a spring, and the combination of FIGS. 5 to 8 shows the entire continuous riveter of the present invention.

FIG. 9 is a cross-sectional view of a main body showing one embodiment of the present invention and a view of a rivet supply section, showing a state in which a trigger valve is switched by gripping an operating lever attached to a continuous riveter, and the operating valve is also switched. FIG. 10 is a cross-sectional view of a drive unit showing an embodiment of the present invention, FIG. 11 is a circuit diagram of a valve unit showing an embodiment of the present invention, and the combination of FIGS. Is shown.

The continuous riveter of the present invention comprises a main body D, a drive section E, a rivet supply section F and a valve section G. The combination of FIGS. 1 to 4 shows a state in which the operation lever (not shown) of the continuous rivet is released, and the combination of FIGS. 5 to 8 grips the operation lever (not shown) of the continuous riveter and only the trigger valve is switched. 9 shows a state in which the trigger valve and the operation valve are both switched in a state where the operation lever (not shown) of the continuous riveter is held by the combination of FIGS. 9 to 11.

As shown in FIGS. 1 and 2, the drive section E includes a small diameter oil cylinder 210 branched laterally from the main body D,
A large-diameter air cylinder 200 that drives the high-pressure piston 211 of the oil cylinder 210, and the air cylinder 2
00 and a pneumatic hydraulic cylinder 300 continuously provided at the rear end thereof. A high pressure piston 211, which is a piston rod of the air piston 220, is integrally formed in the air piston 220 installed in the air cylinder 200. A low pressure piston 330 is installed in the pneumatic cylinder 300,
An oil chamber 310 and an air chamber 320 are defined in the front and rear. The oil cylinder 210 is connected to a port 470 provided above the oil chamber 450 of the chuck cylinder 400 and directly below the bottom dead center of the jaw case piston 500.
The oil chamber 310 of 00 is the retracted position of the high pressure piston 211,
Each of them is communicated with a port 213 at the base end of the oil cylinder 210.

Air piston 2 of the air cylinder 200
A port c, which communicates with a pilot port X of the operation valve 900 described later through a circuit, is provided at the 20 front position, and a port a that communicates with a port e of the operation valve 900 described later through a circuit is provided at the rear position of the piston 220. There is. Further, at the rear position of the pneumatic hydraulic cylinder 300, a port b is provided which communicates with a port d of the operation tape air cylinder 710 through a circuit. A storage case 750 of the rivet supply section F is fixed to the pin 340 (FIG. 2) at the lower rear end of the pneumatic hydraulic cylinder 300.

In the main body D, a chuck cylinder 400 is integrally formed with the oil cylinder 210 at a substantially right angle, a transparent case 410 for accommodating a shaft 741 of a blind rivet 740 is mounted on the upper part, and a rivet supply is provided on the lower part. Part F is installed. In the chuck cylinder 400, an upper air chamber 440 and a lower oil chamber 450 are defined by a jaw case piston 500 that is elastically urged downward by a spring 490, and a blind rivet shaft 741 is formed on the upper wall of the case. A hole 430 is formed through 410, and a port 460 connected to the vacuum side of the vacuum ejector 420 is formed on the upper side wall to bring the inside of the case 410 close to a vacuum. The jaw case piston 500 has a retaining ring 45 at the upper part inside the chuck cylinder 400.
The position of the bottom dead center is regulated by 1. The nose piston 6 is provided below the jaw case piston 500.
No. 00 is provided and a cylindrical body 610 formed under the nose piston 600 is slidably inserted into the lower wall of the chuck cylinder 400, and a nose piece 620 is attached to the lower end of the cylindrical body 610.

A port 470 communicating with the oil cylinder 210 is provided above the chuck cylinder 400 and directly below the bottom dead center position of the jaw case piston 500. A hollow connecting rod 550 is erected on the lower surface of the jaw case piston 500.
The small-diameter piston 551 at the lower end of 50 is slidably inserted from the upper part to the middle in the cylindrical jaw case 510, and the spring 56 is inserted to the upper end of the jaw case 510.
It is urged downward through 0. A hole is bored at the tip of the jaw case 510, and a tapered surface 511 having a smaller diameter toward the tip is provided on the inner surface of the tip, and a pair of jaws 540 are slidably fitted to the tapered surface 511. I am fit. Then, each jaw 540 is urged downward and outward by a spring 520 housed in the jaw case 510 via a sharpened jaw pusher 530.

In the state shown in FIGS. 1 and 9, the tip of the jaw case 510 is on the lower wall 611 of the cylindrical body 610, and the jaw 54 is on the nose piece 620 protruding from the lower wall 611 in a V shape.
The 0 tips are in contact with each other. Nose piece 620
A hole through which the shaft 741 of the blind rivet 740 is inserted is bored there.

The rivet supply section F has a tape air cylinder 710 and a guide plate 720 as shown in FIGS. 1, 4, 5, 8, and 9, and a blind rivet holder 73.
0 is made of polypropylene or the like and has a U-shaped cross section, and has feed holes 732 and upper and lower tabs 731 at regular intervals.
There is a gap between 31 and the tab 731, and a cut groove is provided at the tip of the tab 731, and the shaft 741 of the blind rivet 740 is held in this cut groove. As shown in FIGS. 4 and 8, a tape piston 712 biased forward by a spring 711 is housed in the tape air cylinder 710, and a shaft 713 having a feed claw 713a is fitted into the tape piston 712. Inserted,
It is set with screws 714 for retaining.

A protrusion 721 for guiding the blind rivet holder 730 is formed on the guide plate 720, and a long hole 722 through which the feed claw 713a reciprocates is opened and a check claw 723 is projected. Has been done. The blind rivet holder 740 is elastically pressed against the guide plate 720 by a displacement preventing leaf spring 770 shown by a chain line. The deviation preventing leaf spring 770 elastically presses the blind rivet holder 740 and prevents the blind rivet holder 740 from being displaced from a predetermined position. The storage case 750 has the same structure as the conventional example.

The valve section G is as shown in FIGS. 3, 7 and 11, and 900 is an operation valve, which is a 4-port 2-position pilot switching valve having pilot ports X and Y, and 80.
Reference numeral 0 is a trigger valve, which is a 4-port 2-position switching valve for manually switching an operation lever (trigger) (not shown) attached to the continuous riveter. In the figure, reference numeral 801 indicates a compressed air source such as a compressor, and reference numerals 940 and 830 indicate silencers for the exhaust ports h and o, respectively. And
The port e, the port f, and the pilot port x of the operation valve 900 are connected to the port a of the drive unit E, the port 470 of the main body unit D, and the port e of the drive unit E by a circuit, respectively. And the trigger valve 800
Of the trigger valve 800 is connected to the inlet port g of the operating valve 900, and the outlet port n of the trigger valve 800 is connected to the outlet port m of the operating valve 900.
Is connected to the tape air cylinder 710 and further directly to the pilot port Y of the operation valve 900 by a circuit.

The continuous riveter of the present invention operates as follows. Normally, the blind rivet 740 is loaded in the storage case 750 of the continuous rivet, and the blind rivet 7
Before caulking 40, the state shown in FIGS. 1 to 3 is set, the operation lever (trigger) (not shown) is released, and the blind rivet 740 is held by the nose piece 620 so that it cannot be pulled out downward. That is, the jaw case 5
Since 10 is elastically urged upward by the spring 560, the jaw 540 grips the shaft 741 of the blind rivet 740 in an attempt to descend downward along the tapered surface 511 by the spring 520, so that the jaw 540 does not come out downward. In this state, the tip of the blind rivet 740 is inserted into the hole of the sheet metal 760 as shown in FIG.
6, the compressed air passes through the ports s → n, through the ports g → e of the operation valve, and through the circuit into the rear chamber of the air cylinder 200 from the port a as shown in FIG. 211 moves forward, and the oil in the oil chamber 212 moves to the port 4 of the chuck cylinder 400 as shown in FIG.
Since it flows into 70, the jaw case piston 500 is pushed up by a predetermined distance.

Therefore, the jaw case 510 moves up.
In this case, the pair of jaws 540 is the jaw pusher 530.
Since the jaw 540 is urged downward by the spring 520 via the
11 slides downward while projecting, and as they approach each other, they rise while gripping the shaft 741 of the blind rivet 740. The blind rivet 740 is caulked by the rise of the shaft 741 and then the shaft 741 is cut from the blind rivet 740 at the tip of the nose piece 620.

When the air piston 220 in the air cylinder 200 moves forward as described above, the compressed air flows from the port c through the circuit to the bilot circuit X of the operation valve 900, so that the operation valve 900 is switched to the state shown in FIG. The compressed air from 801 passes through the port s → n of the trigger valve 800, the port g → f of the operation valve 900, the circuit, and the port 480 of the chuck cylinder 400 into the lower air chamber 441, and reaches the jaw case piston 500 and the north piston 600. To rise to top dead center.

At this time, the port a of the air cylinder 200 is connected to the muffler 940 on the exhaust side through the circuit, through the ports e → h of the switching valve 900, and thus the air piston 220.
And the high pressure piston 211 retracts, and then the low pressure piston 33.
Since 0 is also retracted, as described above, the jaw case piston 500 and the nose piston 600 can be respectively raised to the top dead center.

At this time, the vacuum ejector 420 communicating with the port 460 at the upper end of the chuck cylinder 400 is simultaneously blown with the compressed air branched from the pipe line.
10 becomes a vacuum, and the shaft 471 of the blind rivet 740 passes through the hollow hole 552 of the connecting rod 550, the hole 430 of the upper wall of the chuck cylinder 400, and the case 4
All the shafts 741 are housed in the case 410 because they are sucked into the casing 10.

Next, when the operation lever (not shown) is released, the valve portion G is brought into the state shown in FIG. 3 and the trigger valve 800 returns to the original position by the force of the spring 820, so that the compressed air of the air source 801 is transferred to the port s → m. Through the pilot circuit Y of the operation valve 900, the operation valve 900 returns to the original position as shown in FIG.

At this time, the compressed air passing through s → m simultaneously passes through the circuit and enters the port p at the rear portion of the tape air cylinder 710, so that the tape piston 712 is moved forward and the feed pawl 713 is moved.
a moves forward to move the blind rivet holder 730 forward by one pitch, but when the tape piston 712 moves forward, compressed air passes through the circuit from the port d at the front portion of the tape air silling 710 to the air chamber 3 of the empty hydraulic cylinder 300 from the port b.
2, the low-pressure piston 330 moves forward as shown in FIG. 2, and accordingly, the pressure oil in the oil chamber 310 flows from the port 213 to the oil cylinder 210 and the port 470 into the oil chamber 450 of the chuck cylinder 400. As shown, both the jaw case piston 500 and the nose piston 600 descend to the bottom dead center, and at this time, the blind rivet 74 is attached to the jaw 540 opened through the nose piece 620.
0 shaft 741 is held and the tip of the nose piece 620 is above the blind rivet holder 730.
The lower tab 731 is bent downward and lowered.

When the operation lever (not shown) is gripped in order to caulk the next blind rivet, the pressure of the tape air cylinder 710 causes the port p as shown in FIGS.
Through the circuit through the port of trigger valve 800 m →
Since the tape piston 712 retreats to its original position by the action of the spring 711 because it is exhausted from the silencer 830 after passing through o, the blind rivet holder 730 is stopped in the reverse direction by the check claw 723. Therefore, while the blind rivet holder 730 is stopped, the feed claw 71 is
3a disengages from the feed hole 732, moves one pitch forward, and engages with the feed hole 732 in front. At this time, since the blind rivet holder 730 is elastically pressed against the guide plate 720 by a deviation preventing leaf spring (not shown),
It surely engages the feed hole 732 without displacement.
Stop the caulking of the blind rivet 740 and pressurize the air source 8
Even when the connection with 01 is removed, the tape air cylinder 7
The compressed air of 10 passes through the port m → s of the trigger valve 800 through the circuit as shown in FIG. 3, and escapes into the atmosphere, so that the tape piston 712 retracts.

Thus, the preparation for crimping the blind rivet 740 is completed. The subsequent operation is the same as the description of the operation described above, and the blind rivet 740 can be continuously caulked by repeating the above operation.

[0060]

According to the present invention described above, the following effects are exhibited. (1) In the conventional example, when the rivet nose (the nose piece has the same function in the present invention) and the jaw are located at the position sandwiching the blind rivet holder, the rivet caulking is ready, but in the present invention, The nose piece bends down the tab of the blind rivet and descends, and the nose piece corresponding to the conventional rivet nose is attached to the tip of the descending cylinder, so the shaft becomes shorter than the width of the blind rivet holder. Therefore, commercially available blind rivets can be used.

(2) Since the used shafts are housed together in a case separately from the plastic blind rivet holder, wastes can be collected separately.

(3) Even if the continuous rivet is moved or transported, the blind rivet is not detached downward because it is gripped by the jaw due to the action of the tapered surface of the jaw case elastically urged upward by the spring.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main body showing one embodiment of the present invention and a view of a rivet supply unit, showing a state in which a lever attached to a continuous riveter is released and a trigger valve and an operation valve are in normal positions. .

FIG. 2 is a sectional view of a pneumatic hydraulic cylinder showing an embodiment of the present invention.

FIG. 3 is a circuit diagram of a valve showing an embodiment of the present invention.

FIG. 4 is a transverse cross-sectional view of a rivet supply part showing an embodiment of the present invention, and shows the whole of the combination of FIGS.

FIG. 5 is a cross-sectional view of a main body showing one embodiment of the present invention and a view of a rivet supply section, in which a lever attached to a continuous riveter is gripped to switch a trigger valve and the position of the operation valve is the same as in FIG. Indicates the state of.

FIG. 6 is a cross-sectional view of a driving unit showing an embodiment of the present invention.

FIG. 7 is a circuit diagram of a valve portion showing an embodiment of the present invention.

FIG. 8 is a transverse cross-sectional view of a rivet supply part showing an embodiment of the present invention, which is generally shown by the combination of FIGS.

FIG. 9 is a cross-sectional view of a main body showing one embodiment of the present invention and a view of a rivet supply section, showing a state in which a trigger valve is switched and an operation valve is switched by gripping a lever attached to a continuous riveter. Indicates.

FIG. 10 is a cross-sectional view of a drive unit showing an embodiment of the present invention.

FIG. 11 is a circuit diagram of a valve section showing an embodiment of the present invention, and shows the entire continuous riveter in a combination of FIGS. 9 to 11.

FIG. 12 is a vertical cross-sectional view of the main body side in a state in which a lever of a conventional continuous riveter is released, showing the entire continuous riveter in a combination of FIGS. 12 and 13.

FIG. 13 is a vertical cross-sectional view of a drive unit side in a state in which a lever of a conventional continuous riveter is released, showing the entire continuous riveter in a combination of FIG. 12 and FIG.

FIG. 14 is a vertical cross-sectional view of the main body side in a state in which a lever of a conventional continuous riveter is gripped, and shows the entire continuous riveter in a combination of FIGS. 14 and 16.

FIG. 15 is a vertical cross-sectional view of the main body side in a state where a lever of a conventional continuous fire rivet is gripped, and shows the entire continuous fire riveter in a combination of FIGS.

FIG. 16 is a vertical cross-sectional view of a drive unit side in a state where a lever of a conventional continuous riveter is gripped, and shows the entire continuous riveter in a combination of FIGS. 14 and 16 and a combination of FIGS.

FIG. 17 is a perspective view of the rivet supply unit, excluding the storage case in FIGS. 12, 14, and 15, as viewed from the back side.

18 is a cross-sectional view taken along line DD of FIG.

FIG. 19 is a front view of the guide plate of FIG. 16 in which a ridge can be seen.

FIG. 20 is a side view of a rivet nose portion.

FIG. 21 is an explanatory diagram of the vicinity of a rivet supply unit when a blind rivet holder is loaded.

[Explanation of sign]

200 Air Cylinder 210 Oil Cylinder 211 High Pressure Piston 212 Oil Chamber 213 Port 220 Air Piston 230 Rear Chamber 300 Air Hydraulic Cylinder 310 Oil Chamber 320 Air Chamber 330 Low Pressure Piston 340 Pin 400 Chuck Cylinder 410 Case 420 Vacuum Ejector 430 Hole 440 Air Chamber 441 Bottom Air chamber 450 Oil chamber 460 port 470 port 480 port 490 Spring 500 jaw case piston 510 jaw case 511 taper surface 520 spring 530 jaw pusher 540 jaw 550 connecting rod 551 small diameter piston 552 hollow hole 560 spring 600 nose piston 610 lower cylinder 620 Nose piece 710 Tape air cylinder 711 Spring 712 Tape fix 713 shaft 713a feed claw 714 screw 720 guide plate 721 ridge 722 long hole 723 check claw 730 blind rivet holder 731 tab 732 feed hole 740 blind rivet 741 shaft 750 storage case 760 sheet metal 770 anti-slip trigger valve spring 800 801 Pressure source 810 Lever (trigger) 820 Spring 830 Silencer 900 Operation valve 940 Silencer a, b, c, d, e, f, g, h, m, n, s, o, p
Port X, Y Pilot circuit D Main body E Drive section F Rivet supply section G Valve section

Claims (1)

[Claims] 1. A main body, a drive unit, a rivet supply unit, and a valve unit, wherein the main body has a small hole through which a blind rivet shaft passes and an upper end accommodates the blind rivet shaft. A case, and an ejector for evacuating the inside of the case. A chuck cylinder having a hole through which a cylindrical body passes through the lower wall and a port provided in the lower wall, and a chuck cylinder internally provided in the chuck cylinder, A jaw case piston in which a hollow connecting rod is erected on the lower surface is elastically urged downward by a spring to a predetermined position in the upper part of the chuck cylinder, and a hollow connecting rod is erected. A small-diameter piston at the tip of the connecting rod is elastically urged downward through a spring to be slidably inserted in the upper part, and a hole is formed at the tip, and the inner surface of the tip is smaller as the tip becomes smaller. A jaw case having a taper surface formed in, and a jaw case piston in the chuck cylinder, which is internally provided below the jaw case piston, and a cylindrical body is integrally molded in the lower part, and the cylindrical body is inserted into a hole in the chuck cylinder lower wall, The jaw case is slidably fitted into the cylindrical body, and a nose piston having a nose piece attached to a lower end thereof is slidably fitted to the tapered surface, and a sharpened jaw pusher is attached by a spring. And a pair of jaws that are urged downwardly and outwardly through the air cylinder, the drive unit forms an air cylinder having an air piston, and the piston rod of the air piston forms a high-pressure piston in an oil cylinder. , An oil cylinder communicating with a port below the bottom dead center of the jaw case piston above the chuck cylinder, and an oil cylinder attached to the air cylinder. An air-hydraulic cylinder that is attached to the oil cylinder and defines an oil chamber and an air chamber in the front and rear through a low-pressure piston, and that communicates with the port at the base end of the oil cylinder at the retracted position of the high-pressure piston; And a port provided at a piston retracted position of the pneumatic hydraulic cylinder, wherein the rivet supply unit is fixed to the blind rivet holder at the top dead center of the jaw case piston and the nose piston. A structure for transferring a blind rivet shaft slidably held at intervals to a shaft center of a nosepiece tip; Piping from one port on the outlet side of the trigger valve and a port provided in front of the air piston of the air cylinder. 4 is switched by Ttoea pressure
An operating valve which is a port 2-position pilot switching valve, one of the outlet side ports of the operating valve communicates with a port provided at a rear position of the air cylinder, and the other passes through a port at the lower end of the chuck cylinder. It communicates with the vacuum ejector, one of the inlet side ports of the trigger valve communicates with a compressed air source, and the other communicates with the exhaust side, and one inlet side port of the switching valve connects to the other outlet side port of the trigger valve. , The other communicates with the exhaust side,
One of the outlet ports of the trigger valve communicates with a port provided at the rear of the tape air cylinder of the rivet supply unit, and a port provided at the front of the tape air cylinder communicates with a port at the rear of the pneumatic hydraulic cylinder. A repeating riveter characterized by doing.