JPS6135325Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a rivet caulking machine that efficiently and labor-savingly perforates and caulks iron plates with rivets through simple operations.

The inventor of the present invention proposed, for example, a device disclosed in Japanese Utility Model Publication No. 53-38938 as a device that uses hydraulic pressure and can continuously change the hydraulic pressure, perforate a workpiece with a rivet, and swage the rivet in a single operation. We have proposed a rivet crimping machine that can be used in a variety of ways, and it is currently gaining popularity.

That is, by pushing up the lever, hydraulic pressure is introduced into the cylinder, and the piston is lowered against the rising force, and the attachment attached to the lower end of the piston applies strong pressure to the rivet, which is installed opposite to this. The steel plate is drilled by being guided through the call-out hole of the pedestal, and then the hydraulic pressure is released and the piston is raised again, and the pedestal is displaced so that its flat part faces the rivet, and then the piston is moved. It is lowered again and caulked.

However, in such conventional examples,
It is necessary to displace the opening hole in the pedestal between the rivet opening process and the caulking process, and in the rivet opening process, there are often pieces of iron plate remaining in the perforated area (burrs), which can cause damage to the product. This often affected appearance and accuracy.

The object of the present invention is to perform the calling process and the caulking process without displacing the pedestal, and to completely prevent burrs from remaining during drilling.

The present invention is a device that draws and swages rivets using a piston that moves up and down by the up and down operation of a lever and a pedestal placed opposite the piston. A slider that supports the pin and slides in a removable manner is disposed at the bottom of the pin, and the end of the slider and the lower end of the lever are connected via a rotator, and the vertical movement of the lever causes the slider to move. It is characterized by being connected so that it can be inserted and removed.

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a vertical cylinder having an oil passage hole 2 at the top. It is connected to a fuel tank via a solenoid valve (not shown). Inside the vertical cylinder 1, a hollow piston 4 having a groove communicating with the oil hole 2 on its outer periphery and a bulged lower part is disposed, and this piston 4 is constantly given a lifting force by a spring 5. Further, inside the piston 4, a hollow piston 6 whose lower part is sealed is applied with a rising force by a pin 7 fixed in the piston 4 via a spring 8 installed inside, and the rising force is transferred from the rising force of the piston 4. It has also been weakened. In addition, a communication part communicating with a groove communicating with the oil passage hole 2 on the outer periphery is provided on the inner upper part of the piston 4, and this communication part includes a protrusion 9 fixed to the cylinder 1 and a spring mounted inside the piston 4. 10, the ball 11 is moved to the piston 4
It is supported with a gap between it and the inner wall, and this gap is closed by the close contact between the inner wall and the ball 11 when the piston 4 descends. Furthermore, an attachment 14 having a recess 13 formed at the tip thereof to engage with the head of the rivet 12 is locked to the lower end of the piston 6.

Further, a C-shaped bent arm 15 is integrally connected to the lower part of the cylinder 1, and a pedestal 16 is formed at the lower end of the bent arm 15.
7 is provided. A pin 18 is elastically supported in the call-out hole 17 of the pedestal 16 by a spring 19. For example, the pin 18 having a T-shaped cross section is supported directly by the spring 19 or It is preferable to support the spring 19 via a member 20 and to attach an adjusting screw 21 to the lower end thereof, which can adjust the elastic force of the spring 19. Furthermore, a slider 2 that slides freely into and out of the lower part of the pin 18 or the support member 20 and prevents the pin 18 from lowering when inserted.
2 are arranged.

Further, a handle 23 is fixed to the bent arm 15, and a lever 24 that can be moved up and down is provided on the handle 23. At the upper end of the lever 24, press the lever 2 with your finger or the like.
A member 25 having a convenient shape for vertically moving the lever 24 is attached, and an inclined part 26 is provided at the upper part of the lever 24 so that this part comes into contact with a contact 27 fixed on the handle 23. Convex part 2 at the bottom of
8, which is opposed to one end of the pressure contact member 30 pivotally mounted on the bent arm 15 with the bolt 29 as a fulcrum, and when the lever 24 is raised, one end of the pressure contact member 30 is raised and the other end is lowered. A contact point 33 of a switch 32 provided on the bent arm 15 is pressed through a leaf spring 31. Also, when the lever 24 is lowered, the protrusion 28 pushes down the leaf spring 31 and presses the contact 33 of the switch 32.

Further, the lower end of the lever 24 is pivotally connected to a bolt 34 fixed to the bent arm 15 and a spring 35
Loosely insert it into one end of the rotator 36 restored by
The other end of the rotor 36 is loosely inserted into the end of the slider 22 and is slid by the rotation of the rotor 36.

In the figure, 37 is an angle material, 38 is an angle material 3
7 shows the iron plate to be caulked.

Next, to explain the function of the present invention, the rivet 12
Material to be caulked, e.g. angle material 37
Layer the iron plates 38 and rivets 12 on the angle material 3.
7 into the hole pre-drilled in the handle 23, facing the recess 13 of the attachment 14.
By pushing the upper member 25 upward, the lever 2
4 rises, the pressure contact member 30 is moved by the protrusion 28.
One end goes up and the other end goes down, pressing the contact 33 of the switch 32, energizing a solenoid valve (not shown) connected to the switch 32, and supplying oil into the cylinder 1 from the oil tank through the oil passage hole 2. be done. The oil supplied from the oil passage hole 2 travels to the outer circumference of the piston 4 and at the same time passes through the gap between the ball 11 and the inner wall of the piston 4 and lowers the piston 6 against the upward force of the spring 8, and the attachment 14 also lowers to release the rivet. 12. When the downward force of the piston 6 reaches its maximum, the hydraulic pressure pushes down the piston 4, the gap between the ball 11 and the piston 4 is cut off, all the hydraulic pressure is applied to the piston 4, and the downward movement of the piston 4 further pushes the piston 4 down. 6 is added, the contact force of the attachment 14 to the rivet 12 is increased, and the rivet 12 is inserted into the access hole 17 of the pedestal 16.
The steel plate 38 is drilled while the pin 18 in the call hole 17 is pushed down as shown in FIG. 3a.

Thus, the calling process is completed, and in order to perform the caulking process, the lever 24 is lowered by pushing down the member 25 on the upper part of the handle 23, the protrusion 28 is also lowered, and the pressing member 30 is moved by the leaf spring 31 to the switch 32.
Since the solenoid valve is no longer energized and the oil supply pressure in the oil hole 2 becomes zero, the attachment 14 rises together with the pistons 6 and 4, and the lower end of the lever 24 reaches one end of the rotor 36. Press down. When one end of this rotator 36 is pushed down,
The other end of the rotator 36 slides the slider 22 using the bolt 34 as a fulcrum, and as shown in FIG. to prevent

Further, when the lever 24 is lowered, the protrusion 28 directly presses the leaf spring 31, so that the switch 32
Since the contact point 33 of
At the same time, the rivet 12 is lowered by the force applied by the piston 4, and the crimping operation of the angle member 37 and the iron plate 38 is completed as shown in FIG. 3B. When the downward pressure on the lever 24 is released, the rotator 36 is restored by the spring 35, and the lever 24 is released.
4 rises, the contact of the leaf spring 31 with the contact point 33 is released, the pistons 6 and 4 rise, and the caulked angle member 37 and iron plate 38 are removed.

Incidentally, when the hole in the above-mentioned calling-out process is simply a call-out hole provided in the pedestal 16 as in the past, burrs often remain in the hole as shown in FIG. 4 a to b, but in the present invention. Accordingly, as shown in Fig. 3a, the burr is accurately cut by the rising force of the pin 18 which is elastically supported in the spout hole, and as shown in Fig. 3b, the burr is cut by the rising force of the pin 18 during the caulking process. and removed to the outside. Also, during the conventional caulking process, the call hole 17 of the pedestal 16 is
It is necessary to displace the rivet so that the flat part faces the rivet 12, but in the present invention, when the tapping process is completed, the pin 18 in the tapping hole 17 rises to close the tapping hole as shown in FIG. 3b. Moreover, since the position is maintained by inserting the slider 22, the caulking process can be performed as is.

As described above, according to the present invention, it is possible to reliably prevent the burrs that tend to remain in the calling process, and also to perform the calling process and caulking process without displacing the pedestal, improving machining accuracy and productivity. It is a great tool because it allows you to measure your needs and also contributes to labor saving.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention and a conventional example, in which Fig. 1 is a side view of the entire main part of the invention, Fig. 2 is a cross-sectional view taken along the - line of Fig. 1, and Fig. 3 a and b are cross-sectional views. Each of the sectional views explaining the operation of the present invention and FIGS. 4A to 4C are sectional views illustrating the conventional operation. 1... Vertical cylinder, 4... Piston, 5...
... Spring, 6 ... Piston, 8 ... Spring, 14 ... Attachment, 16 ... Pedestal, 17
... Call hole, 18 ... Pin, 19 ... Spring, 21 ... Adjustment screw, 22 ... Slider, 24 ...
... lever, 30 ... pressure contact member, 31 ... plate spring,
32...Switch, 33...Contact, 35...Spring, 36...Rotator, 37...Angle material,
38... Iron plate.

Claims (1)

[Claims for Utility Model Registration] (1) A device for drawing and crimping rivets using a piston that moves up and down by the up and down operation of a lever and a pedestal arranged opposite to the piston, in which a rivet is drawn and swaged, the rivet opening being provided in the pedestal. A slider that elastically supports a pin therein and slides removably at the bottom of the pin is disposed, and the end of the slider and the lower end of the lever are connected via a rotator to move the lever up and down. A rivet caulking machine which is connected so that sliders are inserted and removed by movement. (2) The rivet caulking machine according to claim 1, wherein the pin in the call-out hole is supported by a spring and a support member. (3) The rivet caulking machine according to claim 2, which is equipped with an adjustment screw for adjusting the elastic force of the spring.