JPH10156476A - Riveter device and its lubricating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently and surely executing lubrication and oil feeding to a riveter device with a simple structure and operation by operating an oil piston so as to retreat to the position maximizing the capacity of an oil chamber with an external operation. SOLUTION: The oil piston 211 so reciprocated slide within an oil cylinder 210 by operating about ten times a push button 810 as a trigger, and the oil is poured from an oiler into the oil chamber 212 of the oil cylinder 210 by a pumping operation. And the chip end of a maintenance bolt is screwed into the screw hole 253 of the oil piston 211, the maintenance bolt is grown outside by hand, and the oil piston 211 is moved up to the retreat end. By this way, plenty of oil containing no air is rapidly and surely filled into the oil chamber 212. Thereafter, the oiler, a coupling and the maintenance bolt are removed, and a maintenance plug 255 and an oil feeding plug 251 are re-installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rivet device for continuously punching a blind rivet (hereinafter, referred to as a rivet) for caulking a sheet metal or the like, and a method for refueling the rivet device.

[0002]

2. Description of the Related Art In a conventional riveter device, in order to generate a large driving force by using hydraulic pressure, an oil chamber is partitioned by a piston in an oil cylinder, and the oil chamber is filled with hydraulic oil, and the oil chamber is filled with hydraulic oil. Rivet can be driven according to movement

[0003] Therefore, when the hydraulic oil in the oil chamber is insufficient, a proper hydraulic pressure cannot be obtained, and the rivet cannot be driven sufficiently. Therefore, it is necessary to supply or replenish the oil chamber with hydraulic oil.

[0004] In order to perform such refueling or replenishment, conventionally, a fill screw is slightly loosened, a specified oil is injected thereinto, and an intensifier assembly, which is a special lubrication kit, is piston-moved several times in a cylinder. After that, the above-mentioned fill screw is tightened, oil is injected again and the piston is moved again, and finally the fill screw is tightened.

[0005]

However, in the conventional lubrication method, a special and expensive lubrication kit is required, and a part of the drive unit is disassembled, and the fill screw is loosened and tightened repeatedly. Therefore, there is a problem that the work efficiency of refueling is remarkably poor, and the air venting is insufficient.

[0006] The present invention solves the above-mentioned conventional problems, and refueling and replenishing a riveter device.
It is an object of the present invention to provide a riveter device which can be efficiently and reliably implemented with a simple configuration and operation, and a method for refueling the riveter device.

[0007]

According to a first aspect of the present invention, there is provided a rivet device comprising a riveter body, a drive unit, and a rivet supply unit, wherein the drive unit includes an air cylinder. A piston that defines a piston front chamber and a piston rear chamber, an oil piston that is provided integrally with the piston, and defines an oil chamber within an oil cylinder, and that is operated by a trigger operation. A valve section for performing switching control of supply and exhaust to and from the air chamber of the riveter body, and a blind from the rivet supply section according to a change in oil pressure in the oil chamber and a change in air pressure in the air chamber due to switching control of supply and exhaust by the valve section. A nose piece and a jaw for gripping, caulking, and breaking the mandrel of the rivet; An oil supply unit is provided at the end of the riveter body side, and an oil supply maintenance member is screwed into the oil piston from outside the air cylinder, and the oil piston is retracted to a position where the capacity of the oil chamber is maximized by an external operation. It is made possible.

According to a second aspect of the present invention, there is provided a method for supplying a riveter device, comprising the steps of: inserting an oil tank filled with oil into an oil supply section at one end of an oil cylinder; and controlling switching between supply and exhaust based on trigger operation and release of the trigger operation. The oil in the oil jug is injected into the oil chamber of the oil cylinder by sliding the oil piston back and forth, and then the oil piston is stopped from sliding due to the supply and exhaust, and the oil piston is maintained. The member is screwed in, the maintenance member is manually pulled in to the retreat end of the oil piston, and the oil in the oil jug is further injected into the oil chamber of the oil cylinder.

According to a third aspect of the present invention, there is provided a method for refueling a riveter device, comprising: inserting an oil filled oil into a lubricating portion at one end of an oil cylinder and stopping sliding of an oil piston in the oil cylinder. A maintenance member is screwed into the oil piston, and the maintenance member is manually retracted to the retreating end of the oil piston to inject the oil in the oil jug into the oil chamber of the oil cylinder.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The riveter device of the present invention comprises a main body D as a riveter main body, a drive section E, a rivet supply section F, and a valve section G. FIGS. 1 and 2 show a state in which the push button of the trigger valve is released, and FIGS. FIG. 8 shows a state in which the push button of the trigger valve is pressed.

The drive section E includes a small-diameter oil cylinder 210 branched laterally from the main body D,
And a large-diameter air cylinder 200 for driving the zero oil piston 211.

An oil piston 211, which is a piston rod, is integrally formed with a piston 220 provided in the air cylinder 200.

The oil cylinder 210 is an oil chamber 45 which is a space formed between the jaw case piston 500 and the nose piston 600 in the chuck cylinder 400.
It communicates with the chuck cylinder 400 through a hole 470 in the side wall of the chuck cylinder 400 which communicates with the chuck cylinder 400.

A second port is provided for the air cylinder 20.
0 to the piston front chamber 201, the vacuum ejector 420, and the air chamber 480 (FIG. 5) between the nose piston 600 and the rod cover 460. Is communicated to.

The first port is an air cylinder 200.
Is supplied to the rear chamber 202 (FIG. 3), which is the rear position of the piston, and communicates with a port e, which is one of the outlet sides of an operation valve 900 described later.

The third port is a rear port 202 of the air cylinder 200 when the piston 220 is moved forward (FIG. 3).
Is supplied to the pilot air circuit Y of the operation valve 900.

At the lower end of the air cylinder 200, a storage case 750 for the rivet supply section F is fixed with a pin 340.

In the main body D, a chuck cylinder 400 is formed integrally with the oil cylinder 210 at a substantially right angle, and a shaft storage case 410 for storing a shaft 741 of a blind rivet 740 is mounted on an upper portion thereof, and a lower portion is mounted on a lower portion thereof. The rivet supply unit F is mounted.

A vacuum ejector 420 for vacuuming the inside of the case is attached to the upper end of the spindle housing case 410.

A rod cover 460 is attached to the lower end of the chuck cylinder 400, and a jaw case piston 500 is installed inside the chuck cylinder 400. The upper end of the jaw case piston 500 is a bowl-shaped piston 550 with an upper end open, thereby forming the upper air chamber 4
40 and a lower oil chamber 450 are mounted.

The lower part of the chuck cylinder 400 is a jaw case 510, which is fixed to the lower end of the bowl-shaped piston 550. A tapered surface 511 is formed on the inner surface of the tip of the jaw case 510, the diameter of which is reduced toward the tip. A pair of jaws 540 are slidably fitted on the tapered surface 511.

The jaws 540, 540 are urged downward and outward by a spring 520 housed in the jaw case 510 via a sharp jaw case 530.

A mandrel raising pipe 430 is inserted into the jaw case 510, and the upper part thereof is fixed to the mandrel case 410 while penetrating the bottom plate of the mandrel housing case 410.

A nosepiece 600 is disposed below the jaw case piston 500 to define an upper oil chamber 450 and a lower air chamber 480, and a cylindrical body 610 formed at the lower end of the nose piston 600. Is slidably inserted into a rod cover 460 at the lower end of the chuck cylinder 400, and a nosepiece 6 is inserted at the lower end of the cylindrical body 610.
20 are mounted.

In the state shown in FIGS. 1, 5, 6, and 7, the jaw case 62 is attached to the lower wall 611 (FIG. 10) of the cylindrical body 610.
The leading ends of the jaws 540 are in contact with the nose pieces 620 whose leading ends project from the lower wall 611 in a V-shape.

The nosepiece 620 is provided with a hole through which the shaft 741 of the blind rivet 740 is inserted, and a resilient elastic ring 621 (FIG. 10) is mounted at the tip thereof to make the shaft 741 elastic. , So that the inserted blind rivet 740 does not fall during the operation.

On the side wall of the chuck cylinder 400,
A pipe 490 communicating with the lower air chamber 480 and the vacuum ejector 420 at the upper end is provided.
A hole 470 communicating with the port is provided.

The rivet supply unit F has a tape air cylinder 710 and a guide plate 720, as shown in FIGS.
40 is formed in a U-shaped cross section with polypropylene or the like, has a feed hole 732 and upper and lower tabs 731 and 731 at regular intervals, and has a gap 733 (FIG. 9) between the tabs 731 and 731; A cut groove 734 at the tip of the tab 731 (FIG. 9)
The shaft 741 of the blind rivet 740 and the rivet main body 742 (FIG. 10) are held in the cut groove 734.

As shown in FIG. 9, a tape piston 712 urged forward by a spring 711 is accommodated in the tape air cylinder 710, and the tape piston 712 has a shaft 713 having a feed claw 713a. Are set in place with screws 714 for retaining.

A protrusion (not shown) for guiding the blind rivet holder 730 is formed on the guide plate 720, and the feed claw 713a reciprocates in the elongated hole 72.
2 is open.

The blind rivet holder 730
Is elastically pressed against the guide plate 720 by a plate spring 770 (FIG. 9) for preventing slippage, and is provided with a non-return claw 723 acting on the blind rivet 740.

The leaf spring 770 for preventing slippage resiliently moves the blind rivet holder 740 to the guide plate 72.
This is to prevent the blind rivet holder 740 from deviating 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. 2, 4 and 8, and 900 is an operation valve.
A two-position pilot switching valve is mounted at a position indicated by a chain line of, and a trigger valve 800 is mounted at a position indicated by an inner chain line where the oil cylinder 210 and the chuck cylinder 400 intersect with each other. And release it.

In the figure, reference numeral 801 denotes a compressed air source such as a compressor, h and o are open to the atmosphere, and outlet ports e and f of the operation valve are the ports,
The ports communicate with the pilot air circuit Y, respectively.

The outlet port m of the trigger valve communicates with the pilot air circuit x of the operating valve and the port at the upper end of the chuck cylinder 400, and the port n communicates with the inlet port g of the operating valve 900. .

Further, a port is provided in the rod cover 460, through which the air chamber 480 communicates with the port k of the tape air cylinder 710, and when the nosepiece 620 rises to the top dead center (FIG. 7). Body 61
The compressed air in the air chamber 480 is supplied to the tape air cylinder 710 through the lower groove 612 (FIG. 8).

In FIG. 1, reference numeral 251 denotes an oil supply plug as an oil supply portion provided at an end of the oil cylinder 210 on the riveter body D side, and 252 denotes an air cylinder 2.
The maintenance plug 253 screwed into the through screw hole at the rear of 00 is a screw hole formed at the bottom 254 of the oil piston 211 so as to have a certain depth.

The riveter of the present invention operates as follows. Normally, the blind rivet holder 740 is stored in a storage case 750 of the riveter device in a wound state, and when it is not crimped, the state is as shown in FIGS. 1 and 2 and the push button 810 (trigger) is released. , The blind rivet 740 is attached to the nosepiece 620 by the elastic ring 62.
1 is resiliently held and does not fall down.

As shown in FIG. 3, the blind rivet 74
When the rivet main body 742 is inserted into the hole of the sheet metal 760 and the push button 810 is pressed, the trigger valve 80
0 moves, the compressed air passes through the ports s → n, passes through the ports g → e of the operation valve 900, flows into the rear chamber 202 of the air cylinder 200 from the port, and the piston 220 moves forward. Moving forward, oil chamber 2
Since the twelve oils flow into the oil chamber 450 of the chuck cylinder 400, the jaw case piston 500 is pushed up by a predetermined distance. Accordingly, the jaw case 510 moves up.

In this case, since the pair of jaws 540 is urged downward by the spring 520 via the jaw pusher 530, the jaw 540 is moved to the jaw case 510.
Projecting downward while sliding on the tapered surface 511 of
The axle 741 of the blind rivet 740 approaches each other.
Ascend while grabbing.

The rising of the shaft center 741 causes the blind rivet 740 to be caulked, and then the rivet body 742 is stopped at the tip of the nosepiece 620, so that the shaft 741 is cut.

In this case, the air chamber 480 and the air cylinder 2
Since the front chamber 201 is released from the port to the atmosphere through the port f → h of the operation valve 900, the nose piston 600 is pressed downward, and only the jaw case piston 500 rises.

As described above, when the piston 220 advances, the pressure in the rear chamber 202 passes through the port and the pilot air circuit Y
The operation valve 900 moves forward and enters the state shown in FIG. 8, and the pressure from the pressure source 801 is changed to ports s → n → g → f
To the port through the air cylinder 200 and the rear chamber 2
The pressure of 02 is released to the atmosphere through the ports e → h, and the pressure of the pilot air circuit x and the pressure of the air chamber 440 are released to the atmosphere through the ports m → o.

Therefore, as shown in FIGS. 5 to 7, the jaw case piston 500 and the nose piston 600 rise to the top dead center.

FIG. 5 shows that the oil piston 211 returns (the piston 220 naturally also returns), the nose piston 600 rises, returns to a position close to the bowl-shaped piston 550, and pressurized air is blown into the vacuum ejector 420.
Vacuum in the spindle housing case 410 is started.

Further, the nose piston 600 rises with respect to the jaw case piston 500, and the lower wall 61 of the cylindrical body 610 is moved.
Since 1 contacts the lower end of the jaw case 510 and the upper end of the nosepiece 620 pushes up the tip of the jaw 540, the jaw 540 is released.

FIG. 6 shows the jaw case piston 500 and the nose piston 600 ascending, and shows the shaft 74
1 is a mandrel housing case 41 through a mandrel raising pipe 430.
It shows the state sucked up in 0.

FIG. 7 shows a state in which the jaw case piston 500 and the nose piston 600 are both at the top dead center.
Since the tape piston 71 is supplied to the port K of the
2 advances, and the feed claw 713a advances along the elongated hole 722.

For this reason, the blind rivet holder 73
The feed pawl 713a engaged with the feed hole 732 of the zero pulls out the blind rivet holder 730 from the storage case 750 and moves it by one pitch along the ridge of the guide plate 720, and the tip of the shaft 741 is moved to the nosepiece 620. Set on the lower axis.

Next, when the push button 810 is released, the valve portion G is brought into the state shown in FIG. 2, and the trigger valve 800 returns to the original position by the force of the spring 820, so that the compressed air of the compressed air source 801 passes through the port m and operates. The operation valve 900 is supplied to the pilot air circuit X of the valve 900.
Also retreat. At this time, the compressed air in the pilot air circuit Y passes through the port → and is released to the atmosphere from the port f → h.

At the above valve position, the compressed air passes through the port s → m of the trigger valve 800 and passes from the port to the air chamber 44.
0, and the pressure in the air chamber 480 is changed from the port → f → h
Through the jaw case piston 500
And the nosepiece 600 descend to the bottom dead center.

For this reason, at this time, the blind rivet 740 is attached to the jaw 540 opened through the nosepiece 620.
Of the nose piece 620
Of the blind rivet holder 730 lowers by bending the upper and lower tabs 731 of the blind rivet holder 730 downward. The lowering of the nosepiece 620 will be described in detail with reference to FIGS.

When the nosepiece 620 is lowered, the supply of the compressed air to the tape air cylinder 710 is stopped, and the compressed air of the tape air cylinder 710 is released, so that the tape piston 712 moves back to the original position by the action of the spring 711, but is blinded. Since the movement of the rivet holder 730 in the reverse direction is stopped by the check pawl 723, the feed pawl 713a is disengaged from the feed hole 732 and moves one pitch before the blind rivet holder 730 is stopped. It engages with the feed hole 732.

At this time, the blind rivet holder 730
Is resiliently pressed against the guide plate 720 by the plate spring 770 for preventing slippage, and thus reliably engages with the feed claw 732 without shifting the position.

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

10 to 13 show a state in which the nose peas 620 is lowered, and FIG.
Indicates that one head has been sent to the head 7 of the rivet body 742.
42a is located inside the lower tab 731.

FIG. 11 shows that the shaft 741 has the nosepiece 620.
And the tip of the nosepiece 620 is about to bend the upper tab 731.

FIG. 12 shows that the nosepiece 620 is further lowered, the upper tab 731 is completely bent, the mandrel 741 is inserted through the nosepiece 620 and is loosely fitted into the jaw 540, and the rivet is in contact with the tip of the nosepiece 620. Body 7
42 shows a state in which the head 742a of the lower tab 731 slightly bends the lower tab 731.
25, the projection 725 and the head 7
The blind rivet 740 overcomes the resistance of the elastic ring 621 and completely loses the nose peas 6 to the head 742a due to the resistance force required for the lower tab 42 to bend the lower tab 731.
20.

FIG. 13 shows a state in which the blind rivet 740 is completely inserted into the nose peas 620 and descends to the bottom dead center, and the lower tab 731 is also completely bent.

Next, the oil chamber (21) which is carried out at the time of assembling the riveter device, replacing the packing, or at the time of lowering the oil pressure.
The method of refueling 2) will be described.

First, an oil supply plug 251 as an oil supply section mounted on the oil cylinder 210 is removed, and
Then, a joint 255 filled with oil 0 is connected to the tube 257, and the end of the tube 257 is connected to the joint 255 as shown in FIG.

The pressurizing button 810 as a trigger is set to about 1
Operate about 0 times. By this operation, the oil piston 210 can be reciprocated and slid into the oil cylinder 210, as described above, and the oil in the oil jug can be injected into the oil chamber 212 of the oil cylinder 210 by the pump action. .

Thereafter, the reciprocating sliding of the oil piston 210 is stopped. That is, when the riveter device is in the initial state in which the nose piston 600 is near the rod cover 460, the air supply from the pressure source 801 is stopped, the maintenance plug 252 is removed, and instead, the rotation operation is easy. The maintenance bolt 258 as a maintenance member is passed.

Then, the tip of the maintenance bolt 258 is screwed into the screw hole 253 of the oil piston 211, the maintenance bolt 258 is manually pulled out, and the oil piston 211 is moved to the retracted end. This allows the oil chamber 212 to be quickly and reliably filled with a sufficient amount of oil that does not contain air.

Thereafter, the oil jug 256, the joint 255, and the maintenance bolt 258 are removed, and the maintenance plug 25 is removed.
2 and the refueling plug 251 are reinstalled, and the refueling operation is completed. During the refueling operation, the oil jug 256 is raised as shown in the figure.

The oil in the oil chamber 212 is reduced by use. When oil is replenished in the oil chamber 212 so as to compensate for this decrease, the oil supply plug 251 is removed and the oil
By directly inserting 56 and using the maintenance bolt 258 to move the oil piston 211 to the retracted end, the refueling can be completed easily and quickly without a trigger operation.

[0067]

As described above, according to the first aspect of the present invention, it is possible to efficiently and reliably supply oil to the oil cylinder oil chamber of the riveter device with a simple structure and operation. .

Further, according to the second aspect of the present invention, it is possible to obtain the effect that the oil supply to the oil cylinder oil chamber can be promptly and sufficiently performed at the time of assembling the riveter device or replacing the packing.

According to the third aspect of the invention, when the oil in the oil cylinder oil chamber runs short due to the use of the riveter device, the effect that the oil can be supplied most efficiently and sufficiently can be obtained. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, showing a state in which a push button attached to a riveter device is released and a trigger valve and an operation valve are in a normal position.

FIG. 2 is a circuit diagram of a valve according to an embodiment of the present invention, which is generally shown by a combination of FIGS. 1 and 2;

FIG. 3 is a cross-sectional view showing one embodiment of the present invention, showing a state in which a push button attached to a riveter device is pressed and only a trigger valve is switched.

FIG. 4 is a circuit diagram of a valve showing one embodiment of the present invention, which is shown in its entirety by a combination of FIGS. 3 and 4;

FIG. 5 is a cross-sectional view showing one embodiment of the present invention, showing a state in which a push button attached to a riveter device is pressed, and a trigger valve and an operation valve are both switched.

FIG. 6 is a cross-sectional view showing one embodiment of the present invention, showing a state in which a push button attached to a riveter device is pressed and a trigger valve and an operation valve are both switched.

FIG. 7 is a cross-sectional view showing one embodiment of the present invention, showing a state in which a push button attached to a riveter device is pressed, and a trigger valve and an operation valve are both switched.

FIG. 8 is a circuit diagram of the valve in the state of FIGS.

FIG. 9 is a cross-sectional view of a rivet supply unit showing one embodiment of the present invention.

FIG. 10 is a partially cross-sectional front view of the rivet supply section showing one embodiment of the present invention, showing a relationship with a blind rivet holder when the nosepiece is lowered.

FIG. 11 is a partial cross-sectional front view of a rivet supply unit according to an embodiment of the present invention, showing a relationship with a blind rivet holder when a nosepiece is lowered.

FIG. 12 is a partially cross-sectional front view of a rivet supply unit according to an embodiment of the present invention, showing a relationship with a blind rivet holder when the nosepiece is lowered.

FIG. 13 is a partially cross-sectional front view of the rivet supply unit according to the embodiment of the present invention, showing a relationship with a blind rivet holder when the nosepiece is lowered.

[Explanation of symbols]

 D Riveter body E Drive unit F Rivet supply unit G Valve unit 200 Air cylinder 201 Piston front chamber 202 Piston rear chamber 210 Oil cylinder 211 Oil piston 212 Oil chamber 220 Piston 251 Oil supply unit (oil supply plug) 256 Oil supply plug 258 Maintenance bolt (Maintenance) 480 Air chamber 540 Jaw 740 Blind rivet 741 Mandrel 620 Nosepiece

Claims (3)

[Claims] 1. A riveter body, a drive unit, and a rivet supply unit, wherein the drive unit defines a piston front chamber and a piston rear chamber in an air cylinder;
An oil piston that is provided integrally with the piston and that defines an oil chamber in an oil cylinder; and a valve that performs switching control of supply and exhaust to and from the air chamber of the piston rear chamber, the piston front chamber, and the riveter body by a trigger operation. Gripping, crimping, and breaking of the shaft of the blind rivet from the rivet supply unit according to a change in oil pressure in the oil chamber and a change in air pressure in the air chamber due to switching control of supply and exhaust by the valve unit. A nose piece and a jaw with a nose piece, an oil supply section provided at an end of the oil cylinder on the riveter body side, and screwed into the oil piston from outside the air cylinder, and the above-described operation is performed by an external operation. A lubrication maintainer that allows the oil piston to be retracted to a position where the capacity of the oil chamber is at a maximum. Riveter system is characterized by providing a member. 2. An oil cylinder filled with oil is inserted into an oil supply portion at one end of an oil cylinder, and an oil piston is reciprocally slid into the oil cylinder by switching control of supply and exhaust based on trigger operation and release of the trigger operation. Inject the oil in the oil bottle into the oil chamber of the oil cylinder,
Subsequently, the sliding of the oil piston due to the supply / exhaust is stopped, a maintenance member is screwed into the oil piston, and the maintenance member is manually retracted to the retreat end of the oil piston. An oil supply method for a riveter device, further comprising injecting the oil in the oil jug. 3. An oil bottle filled with a filler is inserted into an oil supply portion at one end of an oil cylinder, and a maintenance member is screwed into the oil piston while the oil piston in the oil cylinder stops sliding. And manually filling the oil piston to a retreating end of the oil piston to inject oil in the oil jug into an oil chamber of the oil cylinder.