JPS6144581B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a rivet caulking machine that inserts an object to be assembled between a rivet and a cap and caulks the rivet. Cap supply device that feeds air to the corresponding caulking position,
The present invention also relates to a rivet caulking machine equipped with a cap detection device that detects the presence or absence of a cap at a caulking position in a cap catcher and controls the cap in conjunction with one cycle of caulking, escapement, and cap feeding.

Conventionally, when supplying caps to the caulking position corresponding to the rivet, a series of caps are inserted from a cap supply hopper into a guide on a cap supply rail, and the rows of caps are The structure is such that the most advanced cap is pushed out to a swaged position within the cap catcher and the cap is supplied. In such a cap feeding device, the cap feeding plate is advanced by a distance equal to the outer diameter of the cap, and then reciprocated back to its original position. In this reciprocating motion, as the cap supply plate advances, the series of caps in the guides on the rail force the most advanced cap into a swaged position within the cap catcher. On the other hand, when the cap supply plate returns to its original position, a space equal to the outer diameter of the cap is created at the rearmost part of the guide on the rail, and one cap is fed into this space from the cap supply hopper. Ru.
When the cap is thus supplied to the caulking position within the cap catcher, the object to be assembled is sandwiched between the cap catcher and the rivet catcher, and the caulking operation is performed.

However, since there are some differences in the standard outer diameter of the cap during the manufacturing process, the cap supply plate is repeatedly moved to push the cap into the crimped position inside the cap cap, and while the cap is being supplied, A small dimensional difference in the outer diameter of the caps becomes an accumulation error in a series of consecutive rows of caps in the guide on the rail, and appears as a large dimensional difference. As a result, the cap supply plate moves forward a predetermined distance and then repeats a reciprocating motion back to its original position, while the cap that is pushed into the crimped position in the cap cartridge by the cap supply plate is supplied to the predetermined position. If, for example, the cap is only half pushed into the caulking position, and the latter half remains in the guide on the rail, the cap cannot accommodate the rivet and cannot be caulked. Conversely, one extra half of the cap is pushed into the crimped position, and the cap is damaged by the pressing of the next cap inside the cap cap. Such abnormal cap supply occurs, resulting in drawbacks such as extremely unstable cap supply.

In addition, since the cap supply plate is moved by a reciprocating drive source whose timing is adjusted with respect to the rivet catcher, when the rivet caulking machine and the rivet catcher return to their original positions, the presence or absence of the cap at the caulking position in the cap catcher is determined. Or, regardless of whether the object to be assembled is removed or not, the cap supply plate automatically moves forward at a predetermined timing, and the most advanced cap in the guide on the rail is pushed into the crimping position. As a result, a rivet may be driven dry, and even if the corresponding cap is still held in the swaged position in the cap catcher, the cap supply plate will attempt to advance to the specified position, causing the cap on the rail to move forward. The most advanced cap in the guide presses against and breaks the cap held in a swaged position within the cap catcher. In addition, even if the object to be assembled has not yet been removed from the cap catcher after the rivet is crimped, the cap supply plate will continue to advance to the specified position, and the most advanced cap in the guide on the rail will not be able to be assembled. Pressing the cap that has been swaged has caused damage to the assembled object, such as poor swaging.

In this way, without confirming whether there is a cap at the crimped position in the cap cap or whether the object to be assembled has been completely removed, the cap in the cap cap is compressed by pressing the next cap, and the cap is removed. without losing the function of
In addition, the parts to be assembled are incompletely caulked, resulting in a large number of defective products.

The present invention is aimed at eliminating the above-mentioned drawbacks, and embodiments will be described below with reference to the drawings.

In FIGS. 1, 2, and 3, 1 is a column, and a main body 26 is attached to the upper part of the column 1 so as to project forward. The main body 26
A caulking device 25 consisting of a rivet supply hopper 28 and a rivet catcher 21 into which a stem 22 is inserted is attached via a rivet supply chute 27 to the tip of the rivet supply chute 27.

On the other hand, a bracket 2 is attached to the column 1 so as to correspond to the main body and protrude forward. A chute 3 for supplying caps is fixed to the upper part of the bracket 2, and a catch part 17 is connected to a caulking device 25 at the tip of the bracket 2.
It is installed correspondingly.

In FIG. 4, a cap supply device 31 consisting of a chute 3, an escapement plate 4, an air cylinder 5, an air blow 6 and a rail 7 is attached within the column 1. The chute 3 has a passage 23, and the passage 23 is covered with a chute cover 24. An escapement plate 4 having an oblique cutout at the top of the tip is housed in the passage 23 at the rearmost part of the chute 3 so as to be freely driven back and forth to a certain position, and a notch corresponding to the drive range of the escapement plate 4 is housed. Part 2
9 is bored in the chute cover 24. An air cylinder 5 for escapement is connected to the escapement plate 4, and an air blower 6 is provided on the upper surface of the chute cover 24 in front of the escapement plate 4 so as to connect with the passage 23 of the chute 3. There is. Furthermore,
A rail 7 from a cap supply feeder (not shown) is connected to the passage 23 of the chute 3 between the escapement plate 4 and the air blow 6.

In FIGS. 5 and 6, the catch portion 17 is attached to the tip of the bracket 2,
Capture 12 and cap stopper 1
It consists of 0. The caulking position 18 in the cap catcher 12 is located in the passage 23 of the chute 3.
A cross-shaped anvil 9 is installed so as to be connected to the anvil 9, and a cap 11 is placed on the protrusion 13 of the anvil 9. A portion of the anvil 9 is inserted into a groove 8 provided below the tip of the chute 3, and the cap stopper 10 serves to prevent the anvil 9 from coming off in the forward direction, and the cap stopper 10 also serves to prevent the anvil 9 from moving upward.
and shoot 3 ensure that this is done.

An anvil 9 is attached to the cap catcher 12.
A groove 14 formed to cover the convex portion 13 at the top of the
has been deleted. Further, a spring 15 is inserted into the spring hole at both ends of the cap catcher 12, and the cap catcher 12 facing oppositely has a spring 15 inserted into the spring hole.
It is designed to press against the

The cap stopper 10 includes a detection switch 1.
6 is caulking position 1 in the cap catcher 12
8 and its caulking position 18
A cap detection device 32 is configured to detect the presence or absence of the cap 11 in the cap. The cap detection device 32 is connected to the control circuit of the rivet crimping machine, and detects the cap 11 at the crimping position 18.
It is configured to operate a series of crimping operations depending on the presence or absence of the crimping.

In the above-mentioned rivet caulking machine, as shown in FIG. 7, at the caulking position in the cap catcher 12, the passage 23 of the chute 3 for cap supply is installed on the supplied cap 11 in a manner to be described later. place things on after that,
When the foot switch (not shown) is turned on, only when the detection switch 16 detects one cap 11 in the normal crimped position in the cap catcher 12, the clutch (not shown) is engaged and the rivet catcher 21 is closed. starts to fall, Rivets 20
is pressed by the stem 22 and clamps the object to be assembled 19 between it and the cap 11.

After crimping is completed, the rivet catcher 21 rises and returns to its original position. Next, the cap catcher 12 is opened, the object to be assembled is taken out, and the cap catcher 12 is returned to its original position. Thereafter, only when the detection switch 16 does not detect the cap 11 in the caulking position in the cap catcher 12 or the assembled object 19 after caulking is completed, the escapement air cylinder 5 is activated and the piston rod 30 of the air cylinder 5 is activated. The escapement plate 4 moves forward within the range of the notch 29 due to the pressure of The inserted cap 11 is moved to the stroke position below the air blow 6.

Next, cap 1 is transferred to the stroke position.
1 blows air from an air blower 6 into the gap in the contact surface with the tip of the escapement plate 4, and the cap 11 is blown away in the passage 23 of the chute 3 toward the cap catcher 12 and sent to the crimping position 18.

When the cap 11 thus supplied is held at the crimped position 18 in the cap catcher 12, the operation of the escapement air cylinder 5 is stopped, and as the piston rod 30 retreats, the escapement plate 4 returns to its original position. Return to and complete one cycle. The above is normal operation.

On the other hand, when starting the caulking operation, the caulking operation is not started unless the detection switch 16 detects the cap 11 at the caulking position within the cap catcher. Further, when the detection switch 16 detects the cap 11 at the crimped position 18 in the cap catcher 12 after the rivet catcher 21 is raised, the cap supply operation is not started.

As explained above, the present invention is configured to supply the caps by blowing out the caps one by one with a fluid such as air and reliably sending the caps to the caulking position in the cap catcher corresponding to the rivet. Even if the standard outer diameter dimensions of the caps are not uniform, the caps can be supplied more reliably than by pushing a series of caps into the passageway of the chute. As a result, the cap is reliably fed into the specified position and will not become unable to be crimped. Also, the cap at the crimping position will not be damaged by the pressure of the next cap, and the cap feeding will be very stable and the rivet will be crimped. This has the effect of increasing machine availability and improving work efficiency.

Furthermore, since the present invention has a cap feeding mechanism that operates only when the detection switch detects the presence or absence of a cap at the crimping position in the cap catcher, an operator can pick up the cap at the crimping position in the cap catcher. The caulking work can be performed reliably without checking the presence or absence of the cap or the condition of the cap. As a result, incomplete caulking due to damaged caps is eliminated, and the caps of the objects to be assembled after caulking are no longer damaged, the occurrence of defective products is prevented, and the quality of the objects to be assembled is improved. effective.

It should be noted that the present invention can also be applied to fastening a ring with a hole or a washer in place of a cap, and can also be widely applied to fastening such as press-fitting other than caulking.

[Brief explanation of the drawing]

Figure 1 is a side view of the rivet caulking machine, Figure 2 is an enlarged plan view taken along line A-A in Figure 1, Figure 3 is an enlarged side view with a partial cutout of Figure 1, and Figure 4 is an enlarged side view of the rivet caulking machine. Figure 3B
5 is an enlarged sectional view of FIG. 3C,
Figure 6 is a cross-sectional view taken along line D-D in Figure 5;
The figure is a time chart showing a series of crimping operations of a rivet crimping machine. 1... Column, 2... Bracket, 3... Shoot, 4... Escapement plate, 5...
Air cylinder, 6...Air blow, 7...Rail, 8...Groove, 9...Anvil, 10...Cap stopper, 11...Cap, 12...Cap catch, 13...Protrusion, 14... Groove, 15... Spring, 16... Detection switch, 17
...Catcher part, 18...Crimping position, 19...
...To be assembled, 20... Rivet, 21... Rivet catcher, 22... Stem, 23... Passage, 24... Chute cover, 25... Caulking device, 26... Main body, 27... Rivet supply Chute, 28... Rivet supply hopper, 29...
Notch, 30...Piston rod, 31...Cap supply device, 32...Cap detection device.

Claims (1)

[Scope of Claims] 1. In a rivet caulking machine that sandwiches the object 19 between the rivet 20 and the cap 11 and caulks the rivet 20, an air cylinder is installed in the passage 23 at the rearmost part of the chute 3 that supplies the cap 11. The escapement plate 4 connected to the air blower 5 is housed, and the air blower 6 is provided on the upper surface of the chute cover 24 in front of the escapement plate 4 so as to be connected to the passage 23. One cap 11 inserted from the rail 7 connected to the passage 23 is transferred to the stroke position below the air blow 6 by the advancement of the escapement plate 4, and then,
A rivet caulking machine characterized in that the cap 11 is supplied by blowing out the cap 11 with air or other fluid from an air blower 6 and sending it to a caulking position 18 corresponding to the rivet 20. 2. In a rivet caulking machine that sandwiches the object 19 between the rivet 20 and the cap 11 and caulks the rivet 20, an escapement connected to the air cylinder 5 is connected to the passage 23 at the rearmost part of the chute 3 that supplies the cap 11. The air blower 6 is provided on the upper surface of the chute cover 24 in front of the escapement plate 4 so as to be connected to the passage 23, and the air blower 6 is connected to the passage 23 of the chute 3 between the escapement plate 4 and the air blower 6. One cap 11 inserted from the rail 7 is moved to the stroke position below the air blow 6 by the advancement of the escapement plate 4, and then
The cap 11 is blown out with air or other fluid from the air blow 6 and sent to the caulking position 18 corresponding to the rivet 20, and the bracket 2 supplies the cap 11 and fixes the chute 3.
A catch portion 17 consisting of a cap catcher 12 and a cap stopper 10 is provided at the tip of the cap.
A detection switch 16 is installed in the cap stopper 10 so as to correspond to the caulking position 18 in the cap catcher 12.
A rivet crimping machine characterized by detecting the presence or absence of a cap 11, etc. at a crimping position inside the rivet.