JPS58173049A - Rivet striking machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a rivet for installing broken-shaft rivets having a removable reservoir for receiving the broken end of the shank of the installed rivet as it is extruded from the rivet-setting mechanism. The present invention relates to a riveting machine, and more particularly to a riveting machine having means acting as a safety device to prevent the extrusion of the shank end in the absence of a receiver in position G for receiving the shank end.

Riveting machines for installing rivets in which the shank breaks are well known and include means for rotating or pulling the rivet into engagement with the shank of the shank breaking rivet to set the rivet. The setting operation is terminated by the breaking of the rivet shank. A portion of the broken shank normally remains within the body of the setting rivet, and the other part or end of the shank is discarded. The riveting machine can be either manually operated or powered by air specific force.In the case of pneumatically operated riveting machines, the main source of power for setting the rivet is compressed air, which is used to set the rivet. It is common practice to extract the shank end from the riveting machine and convey it to a reservoir, which generally takes the form of a container in which the shank end can be collected. It will be appreciated that the flow of air carrying the torn shank end (which is normally done) accelerates the shank end to a velocity with considerable energy. It is understood that if the riveting machine is activated, the handle end becomes a dangerous flying object, falling to the floor and potentially scraping your feet. It will be.

According to this invention, the rivet handle is engaged with the rivet.
) a riveting head having means for operating the rivet to set the rivet and break the end of the handle; a means for pushing out the broken end of the handle from the riveting head; a receiver releasably retainable with the riveting head for receiving the riveting head, the receiver being actuated to override the means for pushing out the handle end when the receiver is removed from the riveting head; A riveting machine is provided for installing a shank break bet in which a riveting head is provided with a disabling means.

The extrusion device can be operated by a supplied compressed air, and the disable device reduces the leakage of compressed air to the extrusion device when the receiver is removed from the riveting head to prevent the riveting head from the handle. Means is provided for acting to override the extrusion device for extruding the end of the section.

The override device is operable to divert compressed air from the supply to the exhaust to reduce flow to the extrusion device.

The override device is operable to block air flow to the extrusion device.

The override device may include a valve arrangement configured to reduce the flow of compressed air to the injector.

The valve device is operable to open an exhaust passageway through which compressed air supplied to operate the extrusion device can be vented to atmosphere instead of operating the extrusion device.

The valve device may be a shutoff valve provided to stop the flow of compressed air in the extrusion device. It has an exhaust passage that opens at the quotient of the head, and a catchment device is fitted to the riveting head [and sometimes also has a device for sealing the opening of the exhaust passage, and the sealing device is used when the catchment device is removed. Sometimes it can be moved away from the surface without sealing the opening.

The sealing device may be a washer arranged to be held in sealing engagement with the front around the opening.

The evacuation device is openable into a socket in a catchment device capable of receiving the handle end, and the sealing device is arranged to be pressed into sealing engagement with the face by engagement of the catchment device in the socket. The sealing washer can be elastically deformable.

The valve arrangement can include a valve body having a passageway for air to flow into the extrusion arrangement and a valve closing member upstream of the supply which closes the passageway when the reservoir arrangement is removed from the riveting head.

Embodiments of the invention will now be described by way of example with reference to the accompanying drawings, in which: FIG.

Referring to Figures 1 to 3 of the drawings, a first embodiment is a fluid riveting machine 10 of the well-known type capable of installing pull-set type handle-broken rivets, and includes all the information necessary for an understanding of the invention. Only parts will be explained.

The riveting machine 10 comprises a riveting head 7.2 having a capacity for receiving and collecting the broken shank end of the shank break bet, and a handle 16 which is coupled to a fluid pressure intensifier by means of a trigger. It is equipped with The handle/A has an air inlet, 20, which is connected by a hose (not shown) to a source of compressed air when using the riveting machine. When the operator pulls the trigger /g, compressed air flows from the compressed air source into the chamber 2/ of the Masuda source air cylinder 2.2. This causes the piston, 23, to be moved upwards in the drawing, forcing fluid out of the augmentor chamber, 21. Then,
The fluid acts in a substantially closed cylinder, 2g, of the riveting head 7.2 to actuate the piston, 26. Therefore, the fluid enters the left side of the piston 2A in the cylinder 2g and causes the piston 2A to move rearward, that is, to the right in one plane, thereby compressing the helical spring 30 for returning the piston. Releasing the trigger /g cuts off the supply of compressed air to chamber 2/ and evacuates chamber 2/.

The piston 26 is then pushed forward by the spring force exerted by the compressed helical spring 30 for returning the piston.
Fluid is forced out of the cylinder g into the chamber -y- and the piston, 23, is moved downwards back to its original position within the air cylinder, 2.2.

A piston, 2A, is fixed midway between the ends of the tension body 3''. A part of the tension body 3 extends forward of the piston 2 into the riveting head JJ of the riveting head 2. The front end of the nose part 33 is closed by an annular anvil 39 to support the rivet during the setting operation, and a collet 3 is fixed to the front end of the tension body 3λ.
A handle gripping device consisting of an inner jaw 3g is attached to the nose portion 33.
It's within. When the piston: 16 is actuated backwards, the piston, 26 moves the tension body 3.2 and the cholera) J4 backwards, and the rivet handle is pushed through the anvil 3q into a position between the jaws 3g. Close the jaw 3g to pull the rivet handle. Next, when the rivet body is supported by the anvil 3 (in this case, the rivet handle is pulled), the rivet is tightened by deforming the rivet body and breaking the handle. The end of the handle remains between the jaws Jg.Piston, 2
To return the handle to the front, return the handle S gripping device to the front, open the jaw 3g, and release the end of the handle.

The passage dada is provided so that the broken handle end passes rearward between the jaws 3g, passes through the riveting head 7.2, exits from the rear end, and enters the collecting valley g77t/F. The broken shank end is marked +A and is shown in FIG.

In order to guide the installed rivet shank end 6 along the passageway into the container/dam, a passageway is formed as part of the air injector, whereby the air flow is directed through the passageway +2. Then move backwards and carry the handle part 6 in the passageway and put it into the container.

The air injector has a piston, a rearwardly projecting portion of the tubular tension body 3.2, and a tubular throat side 5. The throat member 5.2 is elongated and has a large 7 lange S3 at its front end. The piston 2 is held in contact with the throat member 5.2 so that it extends rearwardly from the flanged end of the throat member 5.2 at a distance somewhat greater than the length of the portion SO with the throat member 5.2. The diameter of the hole sg is smaller than the tapered part s6.
The diameter of the hole sg is reduced rearward toward the tensile body, 3.
It is coaxial with the hole No. 2 and extends toward the rear end of the throat member S. The wide hole slI is formed between the tension body 3.2 with sufficient clearance to form an annular passageway 6 between the tension body 3.2 and the periphery of the tension body 3.2.
Partial SO after 2 has been received. The throat member S' has a plurality of holes 6y- extending from the outside of the throat member 3.2 into the annular passage 6.2.

The pressurized air that can be introduced to the outside of the cylinder member 5.2 at the rear of the piston 2g flows through the hole 6g into the annular passage 6.2, and then through the tapered diameter-reducing passageway 6.2. It flows through the closed portion S6 into the narrow hole and into the atmosphere via a collection container/dam. Flow from the large hole to the narrow hole in the throat member 1.2.

In the passage, the flow of compressed air induces a secondary flow of air in the rearward direction through the tension body 3.2, which secondary air flow is already present between the jaws or within the tension bar 3.2. There are people,
carrying the handle end 6. and pushing the handle end 6 backwards out of the rear end of the riveting head 7.2 through a passage 1I4I provided in connection with the tensioning body 32 by the throat side S-; put out.

As mentioned earlier, the purpose is to capture the handle end 16 that emerges from the rear end of the riveting head, thereby preventing such handle end from creating a hazard.

The rear end of cylinder 2g is generally closed by a stepped annular gland 70 keyed to the rear end of the bore of cylinder 2g.

The manifold 7.2 is secured to the gland θ by an annular nut tI which is screwed onto the gland 7θ. The outer cylindrical rear part 6 of the throat member S2 through which the narrow hole 5g passes
0 protrudes rearward through the ground 7θ, and the piston, 2
6 is the cylinder, 2g moves (sometimes can slide in the longitudinal direction. Throat member S) and gland 70 together with the valve that controls the flow of compressed air to the injector during tool operation (1 and 2). Configure.

Therefore, the compressed air required for the operation of the air injector is supplied by the hose 2 from the pressure source, enters the manifold 2, first flows through the front 'ijiqg, turns at right angles Q, into the passage go, and flows through the annular ground? θ+hole g formed,
2 into the central hole of the gland 70 which receives the rear portion 6θ of the throat member 5-. When the piston 2 is at the forward end of its stroke, the annular passage around the rear part 60 of the throat member 3.2 is in the gland 7 and the piston 26 is slid forward into the cavity of the cylinder g. in the process of. Therefore, the compressed air enters the cylinder 2g, passes through the hole 6q, passes through the larger hole sp of the throat member 3.2, and flows backward to the atmosphere, so the handle end 6 is explained earlier. It can be pushed backwards in a similar manner.

To ensure that maximum pressure is useful when the shank is broken by the pull of the riveting machine, the piston, 2, is moved backwards a small distance to set the rivet at both the I & final stages. As soon as the air flow to the air injector is cut off.

Therefore, the throat member 5.2 is stepped to provide a parallel line portion 66 having an outer diameter larger than the outer diameter of the rear portion 5.2, and a slight forward movement of the piston 2 causes the throat member 6. ．．
When 2 is moved rearward, the front part 66 enters and blocks the annular passage gy, so as to cut off the flow of air to the cylinder, 2g and the injector. The injector is therefore activated by the operator releasing the trigger 7g at the end of the riveting operation and releasing the piston 26.
Once the spring is pulled back by the helical spring 3θ, operation is temporarily stopped and the passage is opened for air to flow to the injector again.

The container lug is placed in the first position to allow the air coming from the injector to escape to the atmosphere.
The manifold 7 has an exhaust hole 86 as shown in the figure.
-〇 Rear end (O to the socket qO with internal thread formed here
It has an externally threaded neck Bgg that can be held in place. container/
The V can therefore be supported on the riveting head /- at a predetermined position to catch the extruded handle end 6, and can be easily removed by unscrewing it from the manifold, for example to empty the container /4. be able to.

The operation of a riveting machine without a container in the required position is a situation where there is a risk of danger or injury.

Therefore, the riveting machine of this embodiment has a container / 17 i
)i IJ head hit head/ko no soga)? The air supply to the air injector has a means for venting to the atmosphere when not properly secured to the air injector, thus reducing the air flow through the injector and rendering the air injector inoperative. The handle end cannot be pushed out from the riveting head/co.

As clearly shown in FIG. 3.9, the manifold hole has an annular surface hole around the nut 4t at the inner end of the socket 9θ. The exhaust passage 94t extends with the hose 76 roughly aligned with the front chamber 7g in an annular direction? - My eyes are open at 95.

λ annular washers? Otsu,? Zaganara)? It is maintained by +. Washer? 6 is an elastically deformable sealing washer made of rubber, and washer 9g is a strong support washer made of steel. When you can't
The position where washers qb and qg method washers 9A contact and engage with the annular surface 9.2, and the position where washer 9g is away from the annular surface (light (light)
It can be made to float in the longitudinal direction of the nut between the position where it touches the annular direction 9-. Therefore, the seal washer 9
Is 6 an opening? Doesn't close S and Y is folded during normal supply? - Compressed air entering the injector can escape to the atmosphere through the galvanic exhaust passage 94' sufficient to prevent operation of the injector.

When the container /+ is screwed into the socket 90 as shown in FIG. Compress the sealing washer 96 against the exhaust passage? Close the opening 9S of q. Therefore, the compressed air can no longer escape through the exhaust passage 9da, but is forced to form another passage to the atmosphere that allows the piston roller to come forward and flow out of the injector via the chamber 2g and hole 6tI. .

(/6) Therefore, firmly fit the container /+ into the socket 9θ,
The position of the container/V prevents the supply air from being discharged before it reaches the injector (until the injector is ready to operate to push the shank end 6 out of the riveting head 7.2). It will be appreciated that it is necessary to compensate for the riveting head /,2.

Therefore, in this embodiment of the invention, manifold 7.2
Is it an annular surface? A safety valve is provided in which - forms a valve seat around the opening 9S of the exhaust passage 9da, and an elastic washer 96 forms a closing member for the exhaust opening 9S. In this embodiment, the safety valve prevents the air supplied for the operation of the injector from leaking into the atmosphere when it is closed by the drop of the container into the socket 9θ, so that the injector actuates to push out the broken shank end 414 and, when opened by removal of the container lid, disables the injector allowing at least a large portion of the air to escape to the atmosphere, allowing the air in the bar to Flowing through the injector takes less than 1 minute to force the stem end out.

Another embodiment of the invention will now be described with reference to Figures S and tS, which show a riveting machine having most of the same parts as those of the riveting machine of Figure 7 and designated by the same reference numerals. machine/00 is shown. The riveting machine 100 has a manifold/10 different from that in FIG. socket? It is equipped with a safety valve /1.2 which is kept open by the presence of the vessel L in θ. The safety valve //, 2, when open, allows compressed air to flow through the injector and push out the handle end.

The safety valve /1.2 is closed when no container is fitted into the socket 90, and when so closed forcibly cuts off the supply of compressed air to the injector.

Therefore, the manifold /10 receives a compressed air supply hose 76 extending to the front chamber 7K, from which the air is passed perpendicularly to the hose 76 as holes extending from the annular surface 9.2 to the manifold /10. An annular surface created by the valve body //g that is fixed in the hole? The aperture at λ is closed.

The valve body //g has a stepped axial bore forming a wide passage 7.20 extending from the chamber //6 to the valve body //g and an annular surface 92.
It has a narrow guide hole /λl opened at.

The hole/, 2.2 of the valve body //g extends from the wide passage /, 2θ through the hole g, 2 of the gland 7o to the cavity of the cylinder, 2g.

The valve body //g is associated with a valve closing member or jumper /-g having a sealing washer /-6 and a push rod /,2g. The washer/roller is pressed into sealing engagement with the valve body //g by a compression spring /30 in chamber //6
I am trying to close the passage/20 from there. Press 41!1.
2g extends through the wide passage l-〇 with a gap, and extends through the reduced diameter guide hole/, 2/ of the valve body //g, and the washer 7.26 When sealingly engages the valve body //g, the push rod //2g protrudes beyond the annular surface 9.

In this embodiment, the elastically deformable washer 96 is omitted;
7g of strong steel washers remain.

Container/da is socket'? 0, is the strong washer 9g a socket? Pushed toward the annular surface octopus of θ, the washer 9g first engages the protruding push rods/, 2g of the jumper/241 and pushes against the spring force of the compression spring/30 inside the Y-ni-fold/10. Push the push rod /, 2g in the direction. Washer l
λB is thereby lifted from the valve body / / g,
The passage from chamber //6 to the injector is thus opened.

Conversely, when the container/g is removed from the socket de θ,
The compression spring/3θ, assisted by the pressure of the 1M air supplied, pushes the washer/-A of the jumper/uII into sealing engagement with the valve body//g, so that the compressed air supplied to the injector is clearly This ensures that the handle end cannot be transported until the container is reinstalled. This embodiment has the advantage that no compressed air is wasted by evacuation when the container is removed.

It will be understood that the invention may be practiced in ways other than those specifically described above. Those skilled in the art will be able to safely capture the shank end to ensure that the action of the means for pushing the shank end out of the riveting machine can be defeated when the receiver is removed from the working position. It will be understood that there are other means.

To extrude the shank end from the riveting head (instead of a pneumatically actuated means such as an air jet, the means for shank end extrusion can be an electromagnetic device). The means may be an electrical switch actuated by separation of the shank end receiver from the riveting head.

It will be appreciated that there is no need for a reservoir to hold the shank end extruded from the riveting head as is done with the illustrated embodiment of the container.

Therefore, instead of a generally closed container or receiver for the shank ends, the shank ends may be conveyed to a suitable destination, such as in a packet or other means for collecting and storing the shank ends. The reservoir can be placed in a duct, such as a flexible hose, which is installed in a similar manner.

Although in the embodiments described above the connection between the reservoir and the riveting head is made by screws, it will be appreciated that other means of separately attaching the reservoir to the riveting head may be provided. Thus, for example, a bayonet which removably kneads the receiver in a desired position on the riveting head so as to receive the shank end pushed out and count the actuation of the disabling device until the receiver is separated from the riveting head. It can have a socket structure or a latch structure.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional elevational view of a riveting machine embodying one form of the invention, FIG. 1 is an enlarged sectional view of a portion of FIG. 7, and FIG. 3 is a container for receiving the handle end. 9 is a cross-sectional view similar to that shown in Figure 1, with the rivet machine removed from the riveting machine, and Figure 9 is A-A in Figure 3.
A cross-sectional view taken along the A line, FIG. It is a similar figure to FIG. In the figure, / , 2: ') Bet hit)",
'': Container, ': Handle, 7g: Pull total 1.
26 = Piston 1.2g = Cylinder, 30: Helical spring, 3-kuni tension tube, 33: Nose part, 34t: Anvil, 3A
= Collection, 3g Nijiyo, Kuku: Passage, Da 6: Handle end,! i, 2 throat member, 5 pieces, sgrA: hole, 6.2
Bicyclic passageway, to Nigeland, 72: Manifold, 76
: hose, 7g: front chamber, go = passage, g coni hole, gti
: annular passage, 90: socket, octopus: annular surface, qtI:
Exhaust passage, 9S: opening, q&. 9g = washer, / / 0 knee? Nihold, //, 2:
Safety valve, l/4t: passage, //6: chamber, //II: valve body, /, 2θ: passage, /, 2/: guide hole, 7.2 = jumper, /62 washer, / +2g: push rod, / push rod: compression spring. (,2g)

Claims (1)

[Claims] l A riveting head having a device for engaging a rivet handle to set the rivet and breaking the tail end of the handle, and for pushing the broken handle end out of the riveting head. In a riveting machine for installing a break-shaft rivet, the riveting head has a receptacle device which is removably attached to the riveting head to receive the handle end pushed out from the riveting head. To disable the handle end extrusion device when the device is removed from the riveting head (
A riveting machine characterized in that it has an actuated override device. The extrusion device is operated by supplied compressed air, and the disabling device reduces the flow of air into the extrusion device from the rivet to the handle when the catcher is removed from the riveting head. 2. A riveting machine as claimed in claim 1, further comprising means operative to disable the extrusion device for extruding the edge. 3. Claims FIJ! characterized in that the override device operates to block air flow to the extrusion device! The riveting machine described in item 1. A riveting machine according to claim 1, wherein the nullifier is operative to evacuate compressed air so as to reduce the flow of air to the extrusion device. S. A riveting machine according to any one of claims C to Y, characterized in that the nullification device has a valve device arranged to reduce the supply of compressed air to the extrusion device. 6. The riveting machine according to claim S, wherein the valve device operates to operate the extrusion device (to open an exhaust passage through which the supplied air can be exhausted to the atmosphere instead of operating the extrusion device. The riveting machine according to claim S, characterized in that the device is a shutoff valve provided to stop the flow of compressed air to the extrusion device. means for sealing the opening of the exhaust passage when the reservoir is engaged with the riveting head; The riveting machine according to claim S, characterized in that the sealing means moves away from the surface and does not seal the opening when the receiving device is removed. 9. Sealing means The riveting machine according to claim S, wherein the riveting machine is a washer provided with a surface around the opening of the exhaust passage. The device opens into a socket into which the device can be secured, and the sealing means has an elastically deformable sealing washer which is bent to be pushed into sealing engagement with the bend by the retention of the receiving device within the socket. Claim 8/l The disabling device comprises a valve body having a passage through which air flows into the extrusion device, and a supply upstream valve that closes the passage when the reservoir device is removed from the riveting head. A riveting machine according to claim 1.3, characterized in that it has a side valve closing member.