JPH0576639U - Rivet position indexing device - Google Patents

Abstract

(57) [Summary] [Purpose] The rivets placed on the entire outer circumference of the circular workpiece are indexed immediately below the forming tool. A first slider 13 and a second slider 14 are arranged at right angles to a rising and falling direction of a rivet head molding tool 1 of a riveting machine A, and symmetrically with respect to a center line of the molding tool. (1) A first indexing claw 17 with an attitude control device 16 is attached to the tip of the slider, and a second indexing is provided in which the tip of the second slider is unidirectionally rotated by a spring 23 and stopped at a fixed position by a stopper 25. With claws 24
The rivet is sandwiched between the first indexing claw and the second indexing claw to index the rivet stop position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for indexing the positions of a large number of rivets arranged on the outer circumference of a circular part.

[0002]

[Prior Art]

 Conventionally, a ring fitted on the outside of a circular part has to be molded into a rivet head on the head end of a rivet that is arranged at even intervals on the entire outer circumference of the circular part, and the rivet head must first be mounted on the support by a circular shape. Supports rotatably parts. Next, while manually rotating the circular part, the axis of the rivet and the center of the molding surface of the rivetizing machine (provided on the molding tool) are aligned to stop the rotation of the circular part.

After that, the rivet head is molded on the head end of the rivet by the molding shaft of the riveting machine.

[0004]

[Problems to be solved by the device]

 If the rivet head molding method as described above is adopted, the rivet shaft center and the molding surface center of the molding shaft are manually aligned, so that it takes a lot of time and efficiency, and skill is required. was there.

Therefore, an object of this invention is to provide a device for indexing the rivet position extremely quickly and accurately.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is directed to a rivet head of a riveting machine at a right angle to a vertical direction of a forming tool, and at a symmetrical left and right position with a center line of the forming tool interposed between a first cylinder and a first cylinder. A first slider and a second slider, which slide in the approaching direction and the separating direction by the action of the second cylinder, are provided, and the distal end of the first slider is rotatably attached and is directed obliquely downward and forward. A first indexing pawl with a posture control device is provided to lower the tip to a fixed position between immediately before stopping the forward movement of the first slider and before stopping the forward movement. Furthermore, a second indexing is provided at the tip of the second slider. The end of the pawl is rotatably attached, and the second indexing pawl is provided with a pivoting property in the tip lowering direction. Further, the tip of the first indexing pawl is lowered to the second slider. Same level as A stopper for stopping the tip of the second indexing pawl, and a first stopping device for stopping the forward fixed position of the first slider and a second stopping device for stopping the rearward retracted position of the first slider. Furthermore, a third stopping device for stopping the forward fixed position of the second slider, a fourth stopping device for stopping the backward movement of the second slider at a position equal to one pitch of the rivet, and a two-pitch of the rivet. A fifth stop device for stopping at the position, and a first detection device for advancing the first slider before the action of the third stop device accompanying the advance of the second slider; and Immediately after the second slider retreats, the vertical movement of the tip of the second indexing claw is used to detect the presence or absence of the next rivet, and when there is no rivet, the second slider is retracted to the last retracted position. It is obtained by employing the configuration in which the detection device.

[0007]

[Action]

 After the work piece is rotatably set on the support, first, the second slider is moved forward by the action of the second cylinder. At this time, since the tip of the second indexing pawl engages with the outer periphery of the head end of the rivet, the work piece rotates in the rivet feed direction depending on the engagement state. Further, since the first detection device acts during the forward movement of the second slider, the forward movement of the first slider is started by the action of the first cylinder.

Then, the third slider stops the second slider at a fixed position during forward movement. The first indexing pawl of the first slider that has started to move forward lowers its tip immediately before the first slider stops moving forward of the first slider, so that the first indexing pawl moves forward of the rivet that is in engagement with the second indexing pawl. The collision between the rivet located and the first indexing claw is avoided, and the tip of the first indexing claw comes into contact with the outer circumference of the head end of the rivet engaged with the second indexing claw described above. Therefore, the rivet position indexing is completed.

After the position indexing of the rivets is completed, the first slider is retracted by the action of the first cylinder, and the second slider is retracted by the action of the second cylinder. The first slider that moves backward is stopped at the fixed backward position by the second stop device.

When the rivet is present at the subsequent position, the retracted second slider causes the head end of the rivet and the tip of the second indexing pawl to come into contact with each other so that the tip of the second indexing pawl moves up and down. Since it moves, the second detection device acts. Therefore, it is confirmed that there is a rivet, and the fourth slider stops the second slider at the retracted position corresponding to one pitch of the rivets at equal intervals.

Then, the forming tool is lowered to form the rivet head on the head end of the rivet. After molding the rivet head, the molding tool first rises.

When the second detection device does not operate when the second slider is retracted, the second slider is retracted to the stop position by the fifth stop device, and the rivets cannot be distributed to the outer periphery of the workpiece at equal pitches. Prepare for sending.

[0013]

【Example】

 An embodiment according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, at right and left positions which are perpendicular to the vertical direction of the rivet head molding tool 1 of the riveting machine A and which are symmetrical with respect to the center line of the molding tool 1, A first slider 13 and a second slider 14 that slide in the approaching direction and the separating direction by the action of the first cylinder 11 and the second cylinder 12 are provided.

Further, the distal end of the first slider 13 is rotatably attached via a pin 15, and the distal end directed obliquely downward and forward is from immediately before the forward stop of the first slider 13 until the forward stop. A first indexing pawl 17 with a posture control device 16 for lowering it to a fixed position is provided.

As shown in FIGS. 4 and 5, the attitude control device 16 is provided with guide plates 18 arranged and fixed on both sides of the first slider 13, and side surfaces of the first slider 13 of the both guide plates 18. The horizontal groove 19 provided on the side plate surface, the slanted groove 20 extending from the end of the horizontal groove 19 in the forward direction of the first slider 13 and directed obliquely downward, and the horizontal groove supported on both side surfaces of the first slider 13. The rotor 21 is fitted in the first slider 13 and the horizontal groove 19 and the rotor 21 advance the first indexing claw 17 in a posture in which the tip of the horizontal slider 19 and the rotor 21 are in a rising state. Although the rotor 21 is moved from the horizontal groove 19 to the inclined groove 20 immediately before the end of the forward movement and the tip of the first indexing pawl 17 is lowered until the end of the forward movement, a method other than the above may be used. is there.

Further, a second indexing claw 24 is provided at the tip of the second slider 14 so as to be rotatably attached to the distal end via a pin 22 and to impart rotatability in a tip lowering direction via a spring 23. Has been.

Further, the second slider 14 is provided with a stopper 25 that stops the tip of the second indexing claw 24 at the same level as the tip most descending position of the first indexing claw 17. As shown in FIG. 3, the stopper 25 is such that the tip of a bolt screwed from the second slider 14 is in contact with the upper surface of the end of the second indexing claw 24.

Reference numeral 26 is a first stopping device for stopping the forward fixed position of the first slider 13. Reference numeral 27 is a second stopping device for stopping the retracted home position of the first slider 13. 28 is a third stopping device for stopping the forward fixed position of the second slider 14. A fourth stop device 29 stops the backward movement of the second slider 14 at a position equal to one pitch of the rivet a. Reference numeral 30 is a fifth stop device that stops the backward movement of the second slider 14 at a position of the rivet a at about 2 pitches.

Reference numeral 31 is a first detection device that acts to advance the first slider 13 before the action of the third stop device 28 as the second slider 14 moves forward.

In the first stopping device 26 and the second stopping device 27, the contact 33 fixed to the rod 32 that slides together with the first slider 13 and the limit switch 34 come into contact with each other in the illustrated case, and the third stopping device 28. In the illustrated case, the fourth stop device 29, the fifth stop device 30, and the first detection device 31 are arranged so that the limiter 37 comes into contact with the contact 36 fixed to the rod 35 that slides together with the second slider 14. There is.

The positions of the contacts 33 and 36 other than the contact 33 of the second stop device 27 can be freely adjusted by a double nut screwed into the threaded portions of the rods 32 and 35. There is.

Immediately after the second slider 14 retreats, 38 uses the vertical movement of the tip of the second indexing pawl 24 to detect the presence or absence of the next rivet a, and when the rivet a is not present, the second slider 14 is retreated last. It is a second detection device that retracts to a position (stop position by the fifth stop device 30).

In the illustrated case, the second detection device 38 includes a lower arm 39 of the horizontal plate whose end is fixed to the second slider 14, a proximity switch 40 attached to the tip of the lower arm 39, and a second switch 40. The upper end of the lower arm 39 is fixed to the indexing claw 24 and is parallel to the upper side of the lower arm 39. The rivet a is brought into contact with the tip of the second indexing claw 24 to move the second arm in the standing direction. When the ejecting pawl 24 rotates, the tip of the upper arm 41 comes into contact with the proximity switch 40.

Reference numeral 51 in the figure is a detection device for detecting the presence or absence of a rivet by expansion and contraction.

Next, a method of molding a rivet head using the position indexing device having the above configuration will be described.

As shown in FIGS. 1 and 2, the support shaft 2 rotatably supports the protruding shaft 4 of the shaft core of the circular workpiece 3. Rivets a are pre-arranged in the radial direction on the entire outer circumference of the workpiece 3 at equal intervals.

First, the action of the second cylinder 12 advances the second slider 14. At this time, the tip end of the second indexing claw 24 engages with the outer periphery of the head end of the rivet a, so that the workpiece 3 rotates in the feed direction of the rivet a depending on the engagement state.

Further, since the first detection device 31 acts during the advance of the second slider 14, the action of the first cylinder 11 causes the first slider 13 to advance.

Then, first, since the second slider 14 at the time of forward movement is stopped at a fixed position by the third stop device 28, the rotation of the workpiece 3 due to the engagement of the second indexing pawl 24 and the rivet a. Stop.

The first indexing pawl 17 of the first slider 13 that has started to move forward is rotated in the tip lowering direction by the attitude control device 16 immediately before the forward movement is stopped. The collision between the rivet a positioned in front of the engaged rivet a and the first indexing claw 17 is avoided, and the first rivet a engaged with the second indexing claw 24 has the first index on the outer circumference of the head end. The tip of the indexing claw 17 comes into contact, and the rivet a is sandwiched between the first indexing claw 17 and the second indexing claw 24, and the position indexing of the rivet a shown in FIG. 4 is completed.

Of course, the first slider 13 is stopped at a fixed position by the first stop device 26.

After the position of the rivet a is indexed, the action of the first cylinder 11 causes the first slider 13 to move backward, and the action of the second cylinder 12 causes the second slider 14 to move backward. The molding tool 1 is lowered by the operation, the molding shaft 1'of the molding tool 1 is pressed against the head end of the rivet a, and the rivet head is molded at the head end of the rivet a by the swinging swing of the molding shaft 1 '. After molding, the molding tool 1 is raised.

The retracted first slider 13 is stopped by the second stop device 27.

When the rivet a is present at the subsequent 1-pitch position, the second slider 14 moving backward moves the second indexing claw 24 when the head end of the rivet a rides over the tip of the second indexing claw 24. Since the tip end of V moves up and down, the second detection device 38 acts.

Therefore, the existence of the rivet a is confirmed at the position of one pitch, and the fourth stop device 29 stops the backward stop of the second slider 14 at the position corresponding to one pitch of the rivet a.

Further, when the second detection device 38 does not act when the second slider 14 is retracted, the second slider 14 is retracted to the stop position by the fifth stop device 30.

When the second slider 14 retreats to the last retracted position by the fifth stop device 30, the outer periphery of the workpiece 3 cannot be distributed at equal pitches, that is, at intervals of 1 pitch or more that cannot be distributed evenly on the circumference. The rivet a distributed in advance can be sent.

[0039]

【effect】

 As described above, by using the rivet position indexing device according to the present invention, the rivets distributed at the equidistant positions on the outer circumference of the circular workpiece can be accurately fed sequentially under the forming tool. The head can be molded at the head end of the rivet, and rivets with evenly spaced intervals on the circumference can be fed under the molding tool to mold the head at the head end of the rivet.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment.

FIG. 2 is a side view of the above.

FIG. 3 is a partially cutaway enlarged front view showing a main part.

FIG. 4 is an enlarged front view of a molding portion of the rivet head.

FIG. 5 is a transverse plan view of the same as above.

[Explanation of symbols]

 A Riveting machine a Rivet 1 Molding tool 1'Molding shaft 2 Supporting tool 3 Workpiece 4 Projection shaft 11 1st cylinder 12 2nd cylinder 13 1st slider 14 2nd slider 15 pin 16 Attitude control device 17 1st indexing claw 18 guide plate 19 horizontal groove 20 inclined groove 21 rotor 22 pin 23 spring 24 second indexing claw 25 stopper 26 first stop device 27 second stop device 28 third stop device 29 fourth stop device 30 fifth stop device 31 First detection device 32 Rod 33 Contactor 34 Limit switch 35 Rod 36 Contactor 37 Limit switch 38 Second detection device 39 Lower arm 40 Proximity switch 41 Upper arm

Claims (1)

[Scope of utility model registration request] 1. An approaching direction by the action of a first cylinder and a second cylinder at right and left positions that are perpendicular to the vertical direction of a rivet head molding tool of a riveting machine and are symmetrical with respect to the centerline of the molding tool. A first slider and a second slider that slide in the separating direction are provided, and
The distal end of the first slider is rotatably attached to the front end of the first slider, and the front end directed obliquely downward and downward is lowered to a fixed position between immediately before the forward stop of the first slider and before the forward stop. A first indexing claw is provided, and further, the end of the second indexing claw is rotatably attached to the tip of the second slider, and the second indexing claw is provided with rotatability in the tip lowering direction. Further, the second slider is provided with a stopper for stopping the tip of the second indexing claw at the same level as the tip most descending position of the first indexing claw, and for stopping the forward fixed position of the first slider. A first stopping device and a second stopping device for retracting the first fixed position of the first slider;
Further, the third stopping device for stopping the forward fixed position of the second slider, the fourth stopping device for stopping the backward movement of the second slider at a position equal to one pitch of the rivet, and the second stopping device for stopping at the two-pitch position of the rivet. Fifth stop devices are provided respectively, and the third slider is provided as the second slider advances.
Before the action of the stopping device, a first detecting device for moving the first slider forward is provided, and further, immediately after the second slider retreats, the vertical movement of the tip of the second indexing pawl is used to detect the presence or absence of the next rivet. And a rivet position indexing device for detecting the position of the rivet, and further including a second detection device for retracting the second slider to the most retracted position when there is no rivet.