JPH0647475A - Successive riveter - Google Patents

Abstract

PURPOSE:To enable using a standard shape and recovering a used shaft and a plastic tape successively mounted with blind rivets separately. CONSTITUTION:When a nose piston 600 is lowered in a chuck cylinder 400, a blind rivet 740 is held by a nose piece 620 at the lower end of a cylindrical body 610 which is integrally formed with the nose piston to be lowered and the upper and lower tabs 731 of the plastic tape which is fitted with the blind rivet 740 are bent by the lowering nose piece 620. The shaft 741 of used blind rivet 740 is attracted by the attraction of a vacuum ejector 420 and housed in a transparent case 410 mounted on the upper part of the chuck cylinder 400.

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 blind rivet shafts 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 a shaft of a blind rivet passes and a blind portion is provided on an upper portion of the main body. A case in which a rivet shaft is housed is mounted, a vacuum ejector for vacuuming the case is mounted in the case, and a chuck cylinder having a lower wall provided with a hole through which a cylinder passes, A jaw case, which is installed in the chuck cylinder, is elastically urged downward by a spring, has a cylindrical hole at the tip, and has a tapered surface on the inner surface of the tip whose diameter is reduced toward the tip, is integrated into the lower part. Formed jaw case piston,
Inside the chuck cylinder, below the jaw case piston, a cylindrical body is integrally formed in the lower part, the cylindrical body is inserted into a hole in the chuck cylinder lower wall, and the jaw case is slidable in the cylindrical body. And has a nose piece at the lower end, the nose piston having an elastic ring elastically held slidably on the blind rivet shaft, and the nose piece slidably on the tapered surface. A pair of jaws that are fitted together and are urged downward and outward by a spring through a sharp jaw pusher,

The driving portion includes an air cylinder having a piston built therein, an oil cylinder which has a piston rod forming a high-pressure piston and is inserted therethrough, and which supplies pressure oil from a first port below the chuck cylinder. An air-hydraulic cylinder that is attached to the air cylinder, defines an oil chamber and an air chamber in the front and rear through a low-pressure piston, and supplies pressurized oil from a second port below the first port below the chuck cylinder; Ports provided at the front and rear positions of the piston rod of the air cylinder, ports provided at the rear position of the piston rod of the pneumatic hydraulic cylinder, and the rear position of the piston of the pneumatic hydraulic cylinder are closed by the piston and are at the forward position. And a port to be opened, wherein the rivet supply unit includes the jaw case piston and the nose piston. In the top dead center, provided with a structure for transporting the shaft of the blind rivet which is slidably held at regular intervals in the blind rivet holder on the axis of the other party nosepiece,

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

One of the outlet ports of the operation valve communicates with a port provided at the rear position of the air cylinder, and the other of the outlet ports of the operation valve is provided at the piston rear position of the pneumatic cylinder. A port that communicates with the port and is closed by the piston at the retracted position of the piston of the pneumatic hydraulic cylinder and opened at the advanced position communicates with the tape air cylinder of the rivet supply unit and the vacuum ejector. .

Further, instead of the elastic ring, a holding pin for pressing the shaft of the blind rivet from the side is provided on the nose piece, and the holding pin is slidably slidable in the longitudinal direction at the outer end thereof. A leaf spring for elastically urging the holding pin toward the shaft and releasing the elastic urging at the top dead center of the nose piston is provided.

[0034]

Since the shaft of the blind rivet is slidably held by the elasticity of the elastic ring attached to the nose piece, the blind rivet is prevented from coming out downward while being loaded in the nose piece.

Further, in the structure in which the shaft of the blind rivet is pressed from the side by the holding pin instead of the elastic ring of claim 2, the holding pin is fixed to the holding pin by the leaf spring at the top dead center of the nose piston whose grip is released. The elastic urging is released, and the shaft of the blind rivet is pulled into the case at the top of the main body by a vacuum action.

The blind rivet shaft 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. When the jaw case piston and the nose piston descend, the shaft is elastic. It is elastically held by the elasticity of the elastic ring through the hole and 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 cross-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, which shows the entire continuous riveter in combination with FIGS.

FIG. 4 is a sectional view of a main body and a rivet supply section showing an embodiment of the present invention. The lever attached to the continuous riveter is gripped to switch the trigger valve, and the position of the operation valve is different from that in FIG. FIG. 5 is a sectional view of a drive unit showing an embodiment of the present invention, FIG. 6 is a circuit diagram of a valve unit showing an embodiment of the present invention, and FIG. Shows the entire barrage riveter.

FIG. 7 is a sectional view of a main body and a rivet supply section showing an embodiment of the present invention, in which a lever attached to a continuous riveter is gripped to switch a trigger valve and a control valve is also switched. FIG. 8 is a cross-sectional view of a drive unit showing an embodiment of the present invention, FIG. 9 is a circuit diagram of a valve unit showing an embodiment of the present invention, and the combination of FIGS. Is shown.

FIG. 10 is a cross-sectional view of a rivet supply section showing an embodiment of the present invention, and FIG. 11 shows an embodiment of the present invention, in which the blind rivet shaft is held by a nose piece by a holding pin and a leaf spring. FIG. 3 is a cross-sectional view of the main body of FIG.

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 3 shows a state in which the lever (not shown) of the continuous riveter is released, and the combination of FIGS. 4 to 6 shows a state in which the lever (not shown) of the continuous riveter is gripped and only the trigger valve is switched. FIG. 7 shows a state in which the trigger valve and the operation valve are both switched in a state where the lever (not shown) of the continuous riveter is held by the combination of FIGS. 7 to 9.

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 piston 220, is integrally formed in the piston 220 installed in the air cylinder 200. A low-pressure piston 330 is installed inside the pneumatic cylinder 300, and an oil chamber 310 and an air chamber 320 are defined in the front and rear. The oil cylinder 210 is the oil chamber 4 of the chuck cylinder 400.
The oil chamber 310 of the pneumatic cylinder 300 is connected to the first port 470 of the first hydraulic cylinder 50 and the second port 480 below the first port 470.

Piston 220 of the air cylinder 200
A port C communicating with a pilot port X of an operation valve 900 described later through a circuit is provided at the front position, and a port a communicating with a port e of the operation valve 900 described below through a circuit is provided at the rear position of the piston 220. . Further, a port b, which communicates with a port f of the operation valve 900 through a circuit, is provided at a rear position of the pneumatic hydraulic cylinder 300.
A port d that opens and closes communication with the circuit by moving the low-pressure piston 330 back and forth is provided midway in the front-rear direction of 0. The circuit includes a pressure inlet of the vacuum ejector 420 and a tape air cylinder 710 of the rivet supply unit F shown in FIG. Port p
(FIG. 10) and are connected respectively. 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. A nose piston 600 is disposed below the jaw case piston 500, and a cylindrical body 610 formed under the nose piston 600 is slidably inserted into the lower wall of the chuck cylinder 400, and the lower end of the cylindrical body 610 is inserted. Nosepiece 62 on
0 is installed.

A first port 470 and a second port 4 communicating with the oil chamber 450 are provided on the lower side wall of the chuck cylinder 400.
80 is drilled. The jaw case piston 50
A cylindrical jaw case 510 is integrally formed in the lower part of 0, a hole is formed at the tip thereof, and a tapered surface 511 having a smaller diameter toward the tip is provided on the inner surface of the tip. A pair of jaws 540 are slidably fitted in the. And each jaw 540 is a jaw case 510.
A spring 520 housed inside urges downward and outward through a sharpened jaw pusher 530.

1, 7, and 11, the tip of the jaw case 510 is on the lower wall 611 of the cylindrical body 610, and the tip of the jaw 540 is on the nose piece 620 protruding from the lower wall 611 in a V shape. Are in contact with each other. Shaft 7 of blind rivet 740 is attached to nose piece 620.
A hole through which 41 is inserted is formed, and an elastic ring 621 such as an elastic ring is attached to the tip of the hole to hold the shaft 741 slidably by elasticity so that the inserted blind rivet 740 does not fall during the work. Has been done. Instead of holding the shaft 741 by the elastic ring 621, as shown in FIG. 11, a holding pin 632 is provided on the side of the shaft 741 at a right angle thereto, and a leaf spring 633 is arranged on the outside thereof in the longitudinal direction. A relief may be provided at the upper end of the leaf spring 633 so that the elastic biasing force to the holding pin 632 is eliminated at the top dead center where the nose piece 630 is raised.

As shown in FIGS. 1, 4, 7, and 10, the rivet supply section F has a tape air cylinder 710 and a guide plate 720, and the blind rivet holder 730 is made of polypropylene or the like and has a U-shaped cross section. And has a feed hole 732 and upper and lower tabs 731 at regular intervals.
Between the tab 731 and the tab 731, and a cut groove is formed at the tip of the tab 731.
The shaft 741 of 0 is held. As shown in FIG. 10, the spring 7 is installed in the tape air cylinder 710.
A tape piston 712 biased forward by 11 is accommodated, a shaft 713 having a feed claw 713a is fitted into the tape piston 712, and is set by a screw 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 (not shown). The deviation preventing leaf spring 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, 6 and 9, 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 a lever (trigger) attached to a 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 operation valve 90
The port e, the port f, and the pilot port x of 0 are connected to the port a and the port b and the port e of the driving unit E by a circuit and, respectively.

The continuous riveter of the present invention operates as follows. Normally, the blind rivet 740 is loaded in the storage case 750 of the repeating riveter, and the state shown in FIGS. 1 to 3 is in use, and an operation lever (trigger) not shown is shown.
The blind rivet 740 is elastically held by the nose piece 620 by the elastic ring 621 so that the blind rivet 740 does not come out downward. As shown in FIG. 11, the blind rivet 7 is held by the holding pin 632 and the leaf spring 633.
In the case of holding 40, the resilient force of the leaf spring 633 with respect to the holding pin 632 is released by the escape of the leaf spring 633 at the top dead center where the nose piece 620 has risen. Piece 620
Is held by the bullet. In this state, as shown in FIG. 1, the tip of the blind rivet 740 is inserted into the hole of the metal plate 760,
When the operating lever (not shown) is gripped, the trigger valve 80
Since 0 moves to the position shown in FIG. 6, the compressed air flows through the port S → n, the port 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. Then, the high-pressure piston 211 moves forward, and the oil in the oil chamber 212 flows into the first port 470 of the chuck cylinder 400 as shown in FIG. 4, so that 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.

In this case, the port b on the air side of the pneumatic hydraulic cylinder 300 goes through the circuit to the port f of the operation valve 900.
→ Because it communicates with the muffler 940 on the exhaust side through h,
There is no pressure on the oil in port 480. Therefore, the nose piston 600 maintains the position of the lower end inside the chuck cylinder 400 shown in FIG. As described above, the air cylinder 200
When the piston inside moves forward, 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 of FIG. 9, and the compressed air from the compressed air source 801 is the port S of the trigger valve 800.
→ m to the port g → f of the operation valve 900, the circuit b, the port b of the pneumatic cylinder 300 to the air chamber 32.
0 and advances the low pressure piston 330.

Therefore, as shown in FIG. 7, the nose piston 600 first rises due to the inflow of pressure oil from the second port, the oil flows into the oil cylinder 210, and the high-pressure piston 211 retreats. On the other hand, the nose piston 600 rises, the lower wall 611 of the cylindrical body 610 abuts on the lower end of the jaw case 510, and pushes up the tip of the jaw 540, so that the jaw 540 is released, and in this state, the jaw case piston 5
00 and the nose piston 600 both rise to the top dead center.

At this time, the air in the air chamber 440 above the chuck cylinder 400 escapes into the atmosphere from the port 406 above. When the low-pressure piston 330 has finished moving forward, the port d of the pneumatic cylinder 300 is opened, so that the compressed air from the port d passes through the circuit and the vacuum ejector 420 of the main body D and the tape air cylinder of the rivet supply unit F shown in FIG. 7
10 is supplied to each of the ports 715, the inside of the case 410 is in a vacuum state, and the blind rivet 740
7, the shaft 741 is sucked into the case 410, the tape piston 712 in the tape air cylinder 710 moves forward, and the feeding claw 713a moves into the long hole 7.
22 along with the blind rivet holder 730
The feed claw 713a engaged with the feed hole 732 of the guide pulls out the blind rivet holder 730 from the storage case 750 and moves it by one pitch along the ridge 721 of the guide plate 720, so that the tip of the shaft 741 is moved downwardly from the nosepiece 620. Set on the axis of.

Then, when the lever (not shown) is released,
The valve portion is in the state shown in FIG. 3, and the trigger valve 80
Since 0 returns to the original position by the force of the spring 820, the compressed air of the air source 801 passes through the port S → m, and the operating valve 9
00 to the pilot circuit Y, the operation valve 90
0 returns to its original position as shown in FIG. Therefore, the compressed air in the rear chamber 230 of the air cylinder 200 passes through the circuit from the port a, the ports e → g of the operation valve 900 and the ports n → o of the trigger valve 800, and the silencer 830 on the exhaust side.
Exhausted from.

Further, the air chamber 3 of the pneumatic hydraulic cylinder 300
The compressed air of 20 passes through the port b → circuit → port f of the operation valve 900 → the same h and is exhausted from the silencer 940. As described above, since the rear chamber 230 of the air cylinder 200 and the compressed air in the air chamber 320 of the pneumatic cylinder 300 are both discharged, the jaw case piston 500 and the nosepiece 60 are removed.
0 is lowered downward as shown in FIG. 1 by the elastic force of the spring 490 as shown in FIG. 1, and at this time, the shaft 741 of the blind rivet 740 is held by the jaw 540 opened through the nose piece 620. At the same time, the tip of the nose piece 620 has a blind rivet holder 73.
The upper and lower tabs 731 of 0 are bent downward and lowered.

At this time, the compressed air of the tape air cylinder 710 passes through the port p, passes through the circuit, and passes through the port d → port b → circuit of the pneumatic cylinder 300, so that the tape piston 712 retracts to its original position by the action of the spring 711. However, the blind rivet holder 730 has the non-return pawl 7
Since the movement in the reverse direction is stopped by 23, the blind claw rivet holder 730 is stopped and the feed claw 713a is stopped.
Moves out of the feed hole 732 and 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 not-shown leaf spring for preventing displacement, the blind rivet holder 730 reliably engages with the feed hole 732 without displacement.

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 held by the elastic ring of the nose piece or the elastic force of the holding pin, and therefore the blind rivet does not come off from the main body.

[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 section, showing a state where a lever attached to a continuous riveter is released and a trigger valve is in a normal position.

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, which is generally shown by the combination of FIGS.

FIG. 4 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 its position is shown in FIG.
It shows the state when it does not change.

FIG. 5 is a cross-sectional view of a drive unit showing an embodiment of the present invention.

FIG. 6 is a circuit diagram of a valve portion showing an embodiment of the present invention,
The combination of FIGS. 4 to 6 shows the entire continuous riveter.

FIG. 7 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 trigger valve is switched and an operation valve is switched by gripping a lever attached to a continuous riveter. Indicates.

FIG. 8 is a cross-sectional view of a drive unit showing an embodiment of the present invention.

FIG. 9 is a circuit diagram of a valve portion showing an embodiment of the present invention,
The combination of FIG. 7 to FIG. 9 shows the entire repeating riveter.

FIG. 10 is a cross-sectional view of a rivet supply part showing an embodiment of the present invention.

FIG. 11 is a cross-sectional view of a main body and a rivet supply unit when a blind rivet shaft is held by a nose piece by a holding pin and a leaf spring, showing an embodiment of the present invention.

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 the 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 220 Piston 230 Rear Chamber 300 Pneumatic 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 450 Oil Chamber 406, 460 port 470 1st port 480 2nd port 490 Spring 500 Jaw case piston 510 Jaw case 511 Tapered surface 520 Spring 530 Jaw pusher 540 Jaw 600 Nose piston 610 Cylindrical body 611 Lower wall 620, 630 Nose piece 621 Elastic ring 632 Holding pin 6 Leaf spring 710 Tape air cylinder 711 Spring 712 Tape piston 713 Shaft 713a Feed 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 800 Trigger valve 801 Pressure air source 810 Lever (trigger) 30 Sound spring 820 900 Control valve 940 Muffler 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 (2)

[Claims] 1. A body, a drive unit, a rivet supply unit, and a valve unit, wherein the body has a small hole through which a blind rivet shaft passes, and a blind rivet shaft is housed in an upper portion. A case is attached, a vacuum ejector for attaching a vacuum to the inside of the case is attached to the case, and a chuck cylinder having a hole through which a cylindrical body is provided on a lower wall, and the chuck cylinder is internally provided in the chuck cylinder, A jaw case piston that is elastically urged downward by a spring, has a cylindrical hole at the tip, and has a jaw case on the inner surface of the tip that has a tapered surface with a smaller diameter toward the tip An inner portion of the chuck cylinder below the jaw case piston, and a tubular body integrally formed at a lower portion thereof, the tubular body being inserted into a hole in a lower wall of the chuck cylinder, A nose in which the jaw case is slidably fitted in the tubular body, and a nose piece is provided at the lower end, and an elastic ring on which the shaft of the blind rivet is slidably held is slidably attached to the nose piece. A piston and a pair of jaws slidably fitted to the tapered surface and urged downward and outward by a spring through a sharp jaw pusher, and the drive unit includes a piston. A built-in air cylinder, an oil cylinder in which a piston rod of the air cylinder forms and inserts a high-pressure piston, and supplies pressure oil from a first port under the chuck cylinder, and a low-pressure piston attached to the air cylinder. An oil chamber and an air chamber which are defined in the front and rear by means of an air-hydraulic system which supplies pressure oil from a second port below the first port below the chuck cylinder. , A port provided at each of the piston front and rear positions of the air cylinder, a port provided at a rear position of the piston of the pneumatic hydraulic cylinder, and a retracted position of the piston of the pneumatic hydraulic cylinder. The rivet supply unit has a shaft of the blind rivet slidably held at regular intervals in the blind rivet holder at the top dead center of the jaw case piston and the nose piston. The nosepiece has a structure for transferring it to the axial center, and the valve section includes a trigger valve that is a 4-port 2-position switching valve that is manually switched, and one port on the outlet side of the trigger valve and the air cylinder. 4 ports 2 that can be switched by pilot air pressure from the port provided at the piston front position
An operation valve that is a position pilot switching valve, 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 of the outlet ports of the operation valve has the empty port. The tape air cylinder of the rivet supply section and the vacuum ejector are connected to a port provided at a rear position of the piston of the hydraulic cylinder, and a port that is closed by the piston at the retracted position of the piston of the pneumatic hydraulic cylinder and opened at the advanced position of the rivet supply unit A continuous fire riveter that is characterized by communicating with. 2. A retaining pin for pressing the blind rivet shaft from the side is provided in place of the elastic ring on the nose piece, and the retaining pin is slidably slidable in the longitudinal direction at the outer end thereof. 2. The continuous riveter according to claim 1, further comprising a leaf spring which elastically biases the holding pin in the shaft direction and releases the elastic bias at the top dead center of the nose piston.