JPH09225577A - Rivet caulking machine - Google Patents

Abstract

(57) [PROBLEMS] To provide a rivet crimping machine in which the distance between the stem and the roll set can be adjusted very easily even when a plurality of rivet crimping machines are arranged in close contact with each other. According to the present invention, a stem 6 that is movable up and down by an operation of a lifting drive source 20 is provided, a roll set 10 that supports a work is disposed below the stem 6, and a rivet that is supplied to the work is provided. Stem 6 and roll set 10
In the rivet crimping machine which is pressed by and crimped, a height adjusting portion 7 capable of arbitrarily adjusting the height position of the stem 6 is provided on the upper surface of the machine body 2. Therefore, even when a plurality of rivet caulking machines are closely arranged, the distance between the stem 6 and the roll set 10 can be adjusted very easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rivet crimping machine for crimping a rivet on a work.

[0002]

2. Description of the Related Art Conventionally, a rivet has been widely used for joining two plate members. In order to crimp the rivet, a rivet crimping machine 5 as shown in FIG. 5 is generally used.
0 is widely used. This rivet crimping machine 50
Is a stem 5 that can be lifted and lowered by driving the lift drive source 51.
2, a chuck 53 that holds a rivet on the movement path of the stem 52, and a roll set 54 that supports a work below the stem 52. This rivet crimping machine 5
0 means that the rivet held by the chuck 53 is the stem 52.
It is configured so as to be extruded by and supplied to the prepared hole of the work, and further pressed against the roll set 54 to be caulked. The lower end of the roll set 54 is supported by a screw 54a as shown in FIG. 6 so that the distance between the lower end of the stem 52 and the upper end of the roll set 54 can be changed according to the thickness of the work or the like. By tightening and loosening, the roll set 54 can be moved up and down, and the caulking amount of the rivet can be adjusted.

[0003]

However, in the rivet crimping machine as described above, the roll set is moved up and down to adjust the interval between the roll set and the lower limit of the stem to adjust the crimping amount of the rivet. For example, if you arrange multiple rivet caulking machines in a circular shape so that the roll sets come into close contact with each other, the screw part for adjusting the roll sets will be blocked, making it extremely difficult to adjust the roll sets up and down. There are problems such as being lost. Also, even if the rivet crimping machine is installed alone,
Since the screw protrudes downward, there are also problems such as that workability when operating this screw is very poor.

[0004]

In order to solve the above problems, the present invention provides a stem movable up and down by the operation of a lifting drive source, and a roll set for supporting a work is arranged below the stem. In a rivet crimping machine that crimps a rivet supplied to a work by a stem and a roll set, a height adjusting unit that can adjust the height position of the stem is provided. The lifting drive source includes a cylinder rotatably attached to the machine body, and two link levers rotatably connected to a rod of the cylinder. In this lifting drive source, for example, one of the link levers is rotatably connected to a slide shaft having a screw portion held by an adjusting member attached to the machine body, so that at least one of the link levers is attached at a mounting position. The distance between the stem and the roll set is adjustable. Even if the other end of the link lever is rotatably connected to a screw member provided by being screwed onto the stem, the mounting position of at least one of the link levers can be adjusted.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4, reference numeral 1 denotes a rivet crimping machine, which has a stem 6 which is vertically slidable along a front portion of a machine body 2. This stem 6
It is constructed so as to be operated in response to the operation of the lifting drive source 20 provided on the upper part of the machine body 2, and its tip end surface is formed into a shape that is in close contact with the head of the rivet. The lifting drive source 20 is composed of a cylinder 3 rotatably supported by the machine body 2 and two link levers 4 and 5 rotatably connected to the tip of a rod 3a of the cylinder 3. The tip of the link lever 4 is rotatably connected to the stem 6, and the link lever 5 is rotatably connected to a height adjusting portion 7 described later. These link levers 4 and 5 are configured to expand in a fan shape with the tip of the rod 3a as a fulcrum as the rod 3a of the cylinder 3 extends.

The height adjusting part 7 to which the other link lever 5 is connected is guided by the front part of the machine body 2 and is vertically movable above the stem 6, and a slide shaft 7a. Screw shaft 7b connected to the machine body 2
The link lever 5 is rotatably connected to the lower end of the slide shaft 7a. The screw shaft 7b of the height adjusting portion 7 has two screw portions with different winding directions, a right-hand screw portion 7b1,
A left-hand threaded portion 7b2 is formed, the right-handed threaded portion 7b1 is screwed into the adjusting member 7c, and the left-handed threaded portion 7b2 is a slide shaft 7a.
It is configured to be screwed into. A nut member 7d is screwed onto the screw shaft 7b.
By contacting the upper surface of the adjusting member 7c, the screwing amount of the screw shaft 7b can be arbitrarily limited.

Further, a rivet supply section 8 having a hopper 8a capable of storing a large number of rivets and a chute 8b for aligning and transferring the rivets stored in the hopper 8a is installed at the rear portion of the machine body 2. Further, on the moving path of the stem 6, a holding hole 9 into which a rivet can be fitted is provided on the facing surface.
A pair of chuck claws 9 formed in a are arranged, and the tip of the chute 8b is arranged so as to face the holding hole of the chuck claws 9.

On the other hand, an arm portion 2a is integrally formed on the lower portion of the machine body 2 so as to project forward, and a roll set 10 is coaxially formed with the stem 6 at the tip of the arm portion 2a. It is fixed. The roll set 10 includes an anvil 10a fixed to the tip of the arm 2a.
And a pilot pin 10b slidable at the axial position of the anvil 10a. The pilot pin 10b is constantly biased by a spring 10c and is constantly anvil 10.
It is provided so as to project from a.

In the rivet crimping machine 1, the rivets stored in the hopper 8a of the rivet supply section 8 are sequentially delivered to the chute 8b by the operation of vibration imparting means (not shown) or the like, and are aligned and slid on the chute 8b. To do. Then, the leading rivet reaches the holding hole 9a of the chuck claw 9,
It is fitted and held here. On the other hand, the work in which the prepared hole is formed to the extent that the rivet shaft can be fitted is the roll set 1
The zero pilot pin 10b is retained by fitting into the prepared hole.

As described above, when the work is held by the roll set 10 and the rivets are held by the chuck claws 9,
The cylinder 3 operates to extend the rod 3a. As a result, the link levers 4 and 5 spread out in a fan shape and rotate,
The stem 6 is lowered. At this time, the cylinder 3 itself also rotates with the rotation of the link levers 4 and 5, and the stem 6 is smoothly lowered.

The rivet held by the chuck claw 9 is pushed out of the chuck claw 9 as the stem 6 advances, and at the same time, contacts the tip of the pilot pin 10b.
Guided to fit into the prepared hole of the work. That is, since the pilot pin 10b is slidable along the anvil 10a, the pilot pin 10b is pushed by the rivet at this time and is pushed by the anvil 10a.
Retreat inward and guide the shaft of the rivet into the pilot hole of the work to fit it. In this way, when the stem 6 is further lowered after the rivet is supplied to the prepared hole of the work, the tip of the shaft portion of the rivet is deformed along the anvil 10a of the roll set 10 and is caulked to the work.

In such a rivet crimping operation, since the thickness of the work is changed each time, the interval between the tip of the stem 6 and the tip of the roll set 10 (the tip of the pilot pin 10b) is adjusted accordingly to adjust the rivet. It is necessary to adjust the amount of crimping. With this rivet crimping machine 1,
The height adjustment unit 7 adjusts the distance between the stem 6 and the roll set 10.

That is, when the thickness of the work is changed and the distance between the tip of the stem 6 and the tip of the roll set 10 must be adjusted, the screw shaft of the height adjusting portion 7 can be rotated to rotate the slide shaft 7a. Can be moved up and down.
As an example, consider a case where the right-hand threaded portion 7b1 of the screw shaft 7b is rotated in a direction in which it is screwed into the adjustment member 7c. At this time, the left-hand threaded portion 7b2 rotates in the direction in which the left-handed threaded portion 7b2 comes out of the slide shaft 7a. Therefore, the slide-shaft 7a actually moves downward due to the rotation of the left-handed threaded portion 7b2. When the screw shaft 7b is rotated in the direction in which the right-hand screw portion 7b1 comes out of the adjusting member 7c, the slide shaft 7a naturally moves upward. By using the right screw portion 7b1 and the left screw portion 7b2 in this way, the slide shaft 7a when the screw shaft 7b makes one rotation
Since the amount of movement is always equal to or greater than the pitch of the right-hand threaded portion 7b1, the slide shaft 7a can be moved efficiently.

As described above, by moving the slide shaft 7a up and down, the link levers 4 and 5 and the cylinder 3 are moved.
Since each of them rotates, the position of the connection point between the link levers 4 and 5 and the rod 3a of the cylinder 3 changes, and the stem 6
The height position of the tip can be adjusted up and down. In this rivet crimping machine 1, the position of the stem 6 is adjusted by the height adjusting portion 7 provided on the upper surface of the machine body 2 in this way, so that, for example, a plurality of rivet crimping machines 1 having the same configuration can be installed. Even in the case of the shaft configuration, the distance between the tip of the stem 6 and the tip of the roll set 10 can be adjusted by each rivet caulking machine.

In the embodiment of the present invention, the mounting position of the link levers 4 and 5 is adjusted by rotating the screw shaft 7b of the height adjusting portion 7, but the present invention is not limited to this. However, if the screw member is screwed onto the upper end portion of the stem 6 and the link lever 4 is rotatably connected to the screw member, the stem 6
The distance between the stem 6 and the roll set 10 can be adjusted by changing the screwing amount of the screw member by, for example, rotating. Further, not only the raising and lowering drive source using the link levers 4 and 5, but, for example, a rivet crimping machine that moves the stem up and down only by the cylinder,
As a height adjusting portion, a contact portion that can be fixed at an arbitrary position along the outer circumference of the stem is provided, and the contact portion is brought into contact with the machine body to stop the descending of the stem. The effect can be obtained.

The screw shaft 7b of the height adjusting portion 7 and the slide shaft 7a may be integrally formed. In that case, a through hole is formed in the adjusting member 7c so that the screw shaft 7b is inserted, and the two nut members are screwed together so that the adjusting member 7c is sandwiched by the screw shaft 7b inserted in the through hole. With this configuration, even if the slide shaft 7a and the screw shaft 7b are integrally formed, the position of the slide shaft 7a can be adjusted up and down by adjusting the screwing position of each nut member, and the stem 6 and It is possible to adjust the gap with the roll set 10. Further, although the screw shaft 7b is provided with the right-hand screw portion 7b1 and the left-hand screw portion 7b2, the screw shaft 7b can be attached to the slide shaft 7a without using the right-hand screw portion 7b1 and the left-hand screw portion 7b2. Even if the screw shaft is rotatably connected around the axis and is screwed to the adjusting member 7c, the screw shaft 7
By rotating b, the height position of the tip of the stem 6 can be adjusted in the same manner as above.

[0017]

As described above, in the rivet crimping machine of the present invention, a cylinder is rotatably provided on the machine body, and the rod of this cylinder is connected with the vertically movable stem via the link lever. The link lever is further connected to the height adjusting portion so that the rotating state of the link lever can be arbitrarily changed. Therefore, the height of the stem tip can be adjusted by changing the rotation state of the link lever by the height adjusting unit, and the distance between the stem and the roll set can be freely changed. There is an advantage that the property can be improved. Moreover, by moving the stems in this way to adjust the distance, even if a plurality of rivet caulking machines are closely installed, the distance between the stem and the roll set can be adjusted. You can also get Further, since the screw shaft of the height adjusting unit is formed with two screw parts (right screw part and left screw part) having different winding directions, the slide shaft to which the link mechanism is coupled can be efficiently moved. There are also advantages such as being able to.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a rivet crimping machine according to the present invention.

FIG. 2 is an enlarged partial cutaway sectional view of an essential part of the rivet crimping machine according to the present invention.

FIG. 3 is an operation explanatory view of the rivet crimping machine according to the present invention.

FIG. 4 is an operation explanatory view of the rivet crimping machine according to the present invention.

FIG. 5 is an explanatory diagram of a conventional example.

FIG. 6 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Rivet Caulking Machine 2 Machine Main Body 3 Cylinder 4 Link Lever 5 Link Lever 6 Stem 7 Height Adjusting Part 7a Slide Shaft 7b Screw Shaft 7b1 Right Screw Part 7b2 Left Screw Part 7c Adjusting Member 7d Nut Member 8 Rivet Supply Part 9 Chuck Claw 10 Roll set 10a Anvil 10b Pilot pin 10c Spring 20 Lifting drive source

Claims (4)

[Claims] 1. A stem which can be moved up and down by the operation of a lifting drive source provided in a machine body, and a roll set which supports a work below the stem, and a rivet supplied to the work is set with the stem and the roll set. A rivet crimping machine, wherein a rivet crimping machine which is pressed by and is crimped, is provided with a height adjusting portion capable of arbitrarily adjusting a height position of a stem. 2. A lifting drive source comprises a cylinder rotatably attached to a machine body, and two link levers rotatably connected to a rod of the cylinder, and at least one of the link levers is attached. The rivet swaging machine according to claim 1, wherein the position is adjustable. 3. The rivet swaging machine according to claim 2, wherein one of the link levers is rotatably connected to a slide shaft having a screw portion held by an adjusting member attached to the machine body. . 4. The rivet crimping machine according to claim 2, wherein the other of the link levers is rotatably connected to a screw member provided by screwing the stem.