JPH0686838U - Riveting machine - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent damage to the work, stop the operation when an error occurs in the riveting work, and enable the operator to restart after inspection. A rivet R sucked and held by a die mechanism 10 is inserted into a rivet hole H of a work W set and fixed on a rotary sub-table 65 of a turntable device 50,
The tip of the rivet R is crushed in cooperation with the hammer mechanism 40. The rivet holding shaft 12 of the die mechanism 10 is provided with a shock absorbing means 15 provided with a float body 17 which is elastically retracted, and the turntable device 50 detects the retracting operation state of the rotary sub-table 65. Then, the safety assistance means 20 for stopping the forward movement and the backward movement of the die mechanism 10 and stopping the operation is additionally provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a riveting machine that reliably rivets the brake lining to a large brake shoe body in a brake system that is mainly mounted on a large vehicle, and if the rivet hole is a defective product, for example, The present invention relates to a riveting machine improved so that the operation is interrupted when the two do not match and the riveting in each rivet hole is surely performed.

[0002]

[Prior art]

 Conventionally, when attaching the brake lining to the brake shoe body of the brake device, after the brake lining has been brought into contact with the curved outer surface of the brake shoe body, the rivet tip inserted from the brake lining side must be attached to the brake shoe body side. This is done by crushing, and the present inventor has proposed a rivet processing machine as Japanese Patent Application No. 4-119502 to automatically process this.

As shown schematically in FIGS. 3 and 4, this rivet processing machine is arranged at a substantially central portion on a base 1, and supports and fixes a work W to be riveted so that the work W can be rotated and moved up and down. And the turntable device 50 that is set horizontally, and the rivet hole H position of the work W, which is arranged on either the front or rear side of the turntable device 50 and sucks and supports the rivets R that are sequentially supplied. A die mechanism 10 for inserting and holding the rivet, a hammer mechanism 40 arranged on the other side for crushing the tip of the rivet R inserted in the work W, and a front surface of the rivet holding shaft 12 serving as a die in the die mechanism 10. A rivet supply device 30 for aligning and sequentially supplying the rivets R regulated in a predetermined direction, and a sensor means 100 for detecting a rivet hole H in the work W. It is a thing.

[0004]

[Problems to be solved by the device]

 However, in this rivet setting machine, when the rivet R is continuously supplied to the die mechanism 10 to be suction-held, inserted into the rivet hole H and crushed by the hammer mechanism 40, the rivet R itself is inside the rivet hole H. There was a case where it fell into contact with the peripheral edge of the rivet hole H without being inserted into, and fell off. This drop-off is caused by the fact that the direction of insertion of the rivet R by the die mechanism 10 with respect to the rivet hole H that has been formed is not exactly aligned, and for example, the upper surface of the flange of the rivet R is a smooth surface. It is not along the axial direction of the rivet holding shaft at the tip of the die mechanism 10, and the rivet holes H in the brake shoe body S and the brake lining L do not match each other. there were. That is, if the rivet R is a pure product in which the upper surface of the flange is processed to be a smooth surface, the upper surface of the flange is processed to be a smooth surface for some reason even if it is securely sucked and held by the tip of the rivet holding shaft. This is because, in the case of a defective rivet R that has not been formed, it may be moved to the rivet hole H side while being sucked and held in a state inclined with respect to the rivet axis. Further, when the brake shoe main body S and the brake lining L are combined, the respective rivet holes H do not exactly match, and even if the rivet R penetrates the brake lining L, it is abutted against the surface of the brake shoe main body S. It happened.

Therefore, the rivet R abuts against the peripheral edge of the rivet hole H and falls off. Therefore, if the work is continued as it is, the strong impact of the die mechanism 10 and the hammer mechanism 40 causes the rivet hole on the front surface of the brake lining. This resulted in damage to the H edge.

Therefore, the present invention has been devised in view of various existing conditions as described above, and in the case where a defective rivet is sucked and held at the tip of the rivet holding shaft of the die mechanism, If there is a problem that the rivet holes do not coincide with each other, when the rivet collides with the rivet hole periphery, the suction holding of the rivet is released and at the same time the die mechanism is retracted to prevent damage to the brake lining. In addition, it is an object of the present invention to provide an improved riveting machine that can stop the operation at the time of this abnormal occurrence and protect the brake lining, which is a work, so that it can be restarted after inspection by the operator. To do.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, according to the present invention, a turntable device 50 for supporting and fixing a work W to be riveted so that it can be rotated and lifted up and down and set horizontally, and a rivet R sequentially supplied. Is sucked and supported by the rivet holding shaft 12, the die mechanism 11 is inserted into a predetermined position of the work W by the forward movement of the die cylinder 11, and the die mechanism 10 that holds the work W and the tip of the rivet R inserted into the work W are crushed. The rivet holding shaft 12 of the die mechanism 10 is provided with a shock absorbing means 15 in addition to the hammer mechanism 40.

The impact absorbing means 15 has a float body 17 elastically urged so as to project toward the front and is installed inside the tip of the rivet holding shaft 12, and a punch 18 for adsorbing the rivet R on the tip surface is used as an intake source 14. It can be configured by connecting and connecting to the front end of the float body 17.

When the rivet R is dropped by the shock absorbing means 15, the die cylinder 11 can be moved backward.

Further, the turntable device 50 detects that the work W on the rotary sub-table 65 on which the work W is placed is pressed and slid, and causes the die cylinder 11 of the die mechanism 10 to move backward. It is characterized in that auxiliary means 20 is additionally provided.

The safety assisting means 20 can be composed of a reflection type photoelectric sensor on the side surface of the rotary sub-table 65, which reflects detection light aiming at the starting point of the backward sliding of the rotary sub-table 65.

[0012]

[Action]

 In the riveting machine according to the present invention, in the die mechanism 10, when the rivet R adsorbed to the tip of the rivet holding shaft 12 that advances with respect to the work W by the operation of the die cylinder 11 is in an irregular posture, If the rivet holes H in the work W do not coincide with each other, the tip of the rivet R does not coincide with the rivet hole H and is abutted against the peripheral edge thereof. Then, the shock absorbing means 15 drops the rivet R while absorbing the shock and retracts the rivet R before the die cylinder 11 reaches the forward end of the rivet holding shaft 12.

Further, when the die cylinder 11 continues the forward movement as it is and presses the work W by the pressing action of the punch 18 via the rivet R, for example, the rotary sub-table 65 is slid backward. Then, the safety assisting means 20 detects the retracting operation state of the rotary sub-table 65, stops the forward movement and backward movement of the die cylinder 11, and at the same time stops the operation of the devised device.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 is a substantially rectangular base that is long in the front-rear direction when viewed from a plane, and as shown in FIGS. A work W composed of a brake lining L, which is placed in contact with the curved outer side surface of the brake shoe main body S, is rotatably and vertically movably supported and fixed substantially at the center of the upper base 2 of the base 1. A turntable device 50 for setting is arranged. Then, on the front and rear sides of the turntable device 50, a die mechanism 10 for inserting and holding the rivets R sequentially supplied in a predetermined position of the work W in a state of being sucked and supported, and a rivet R inserted in the work. A hammer mechanism 40 for crushing the tip is arranged, and a rivet supply device 30 for sequentially supplying aligned rivets R regulated in a predetermined direction to the front surface of the rivet holding shaft 12 which is a die in the die mechanism 10. It is provided.

The die mechanism 10 is operated by a fluid pressure such as hydraulic pressure, a die cylinder 11, a rivet holding shaft 12 fixed to the tip of the cylinder rod of the die cylinder 11, and a tip of the rivet holding shaft 12. A shock absorbing means 15 is formed on the rivet holding shaft 12, which is composed of an intake source 14 communicating with an intake port 13 opened to a negative pressure state.

As shown in FIGS. 1 and 2, the shock absorbing means 15 is elastically urged toward the front by the elastic force of the return spring 16 built in at the tip of the main body of the rivet holding shaft 12. The float body 17 is built in, and a punch 18 for adsorbing the rivet R on the tip end surface is connected to the intake source 14 and is connected to the front end of the float body 17, and the float body 17 itself is the front end surface thereof. Is so supported as to be flush with the front end face of the rivet holding shaft 12 by the fixing screw 19 so as to be slidable inside the tip of the main body of the rivet holding shaft 12. Therefore, when a pressing force from the front is applied to the rivet holding shaft 12 via the punch 18 or the like, the float body 17 retreats against the elastic force of the return spring 16 and the pressing action is released. Then, the float body 17 is slid back to the front again.

When the rivet R attracted to the tip surface of the punch 18 is released from the tip of the punch 18, air leakage from the intake source 14 is induced, and at the same time, the die cylinder 11 crushes the rivet R together with the hammer mechanism 40. Before reaching the forward end position, the die cylinder 11 is moved to the retracted position.

The punch 18 itself is detachably set to the float body 17 so as to be replaceable, and is designed to be replaceable when there is wear and wear due to use. Further, the rivet hammer 43 of the hammer mechanism 40 is also replaceable.

On the other hand, a turntable device 50 for sequentially raising and lowering the set work W corresponding to the rivet hole H position includes a fixed raising and lowering table 51 which is raised and lowered above the upper base 2, and a fixed raising and lowering table 51. The rotary main table 56 rotated on the table 51 and the rotary main table 56 are driven to rotate together with the rotary main table 56, and elastically slide along the rivet stop direction by both the die mechanism 10 and the hammer mechanism 40. The rotary sub-table 65, the work fixing means 90 for fixing the work W on the rotary sub-table 65, and the work holding means 95 positioned outside the die mechanism 10 side to press and support the outer surface of the work W. ing. Then, the turntable device 50 is provided with a safety assisting means 20 for detecting that the work W on the rotary sub-table 65 is pressed and slid, and moving the die mechanism 10 itself backward by the die cylinder 11 in the die mechanism 10. It is attached.

The safety assisting means 20 is composed of a reflection type photoelectric sensor, which is located on the side surface of the rotary sub-table 65 and reflects the detection light aiming at the starting point of the backward sliding of the rotary sub-table 65, and is shown in FIG. As described above, the rotary sub table 65 on the side of the hammer mechanism 40 is disposed behind the rotary sub table 65. When this sensor is turned on, the air suction action by the intake source 14 is cut off, at the same time the die cylinder 11 is moved to the retracted position, and the operation of the device of the present invention is stopped. That is, for example, in the die mechanism 10, when the suction air pressure is lowered during the forward movement of the die cylinder 11, when the forward movement is continued as it is, the punch 18 moves the rotary sub-table 65 through the workpiece W. When it is forcibly pressed and retracted, this is detected, and the advance of the die cylinder 11 is stopped and retracted, and at the same time, the operation of the devised device is stopped.

Next, to explain an example of the operation of the riveting machine of the present invention, the rivet R supplied from the rivet supply device 30 is adsorbed and held on the front surface of the rivet holding shaft 12 of the die mechanism 10. On the other hand, the work W is fixed by the work fixing means 90 on the rotary sub-table 65 of the turntable device 50, and the rotary sub-table 65 which is rotated by the rotation of the rotary main table 56 which is rotated by the operation of the work 50 is a work. The rivet hole H is positioned in front of the die mechanism 10 while the outer surface of the W is pressed by the work pressing means 95. At this time, if necessary, the fixed lifting table 51 is raised so that the rivet hole H position in the work W corresponds to the rivet stop position where the rivet holding shaft 12 advances.

When the rivet hole H of the work W is brought to the front position of the rivet holding shaft 12 by the detection of the sensor means 100 and the rivet stop position is detected, the turntable device 50 stops its rotation. Then, the rivet holding shaft 12 of the die mechanism 10 advances, and the rivet R is inserted into the rivet hole H. The rivet hammer 43 in the hammer mechanism 40 that operates in synchronization with this moves forward, crushes the tip of the rivet R protruding from the rivet hole H, and performs rivet tightening.

At this time, as shown in FIG. 2, when the rivet R attracted to the tip of the rivet holding shaft 12 is a defective product and is in an irregular posture with an inclination, the tip of the rivet R is advanced even if the die cylinder 11 moves forward. As a result of being abutted against the peripheral edge of the rivet hole H without being aligned with the rivet hole H, the rivet R is dropped while absorbing the impact by the impact absorbing means 15. Although not shown, when the rivet holes H of the brake shoe main body S and the brake lining L of the work W do not coincide with each other, the brake shoe main body S or the brake lining L surface is also in the same manner. The rivets R collide with each other, and the rivets R are dropped while absorbing the impact by the impact absorbing means 15. Then, the die cylinder 11 is retracted before reaching the forward end by adjusting the timing with the air suction timer and decreasing the suction pressure.

Further, when the timing of the setting function for retracting the die cylinder 11 is not smoothly relayed, the die cylinder 11 issues an operation command to move the rivet holding shaft 12 to the forward end position in a normal operation. . Therefore, when the die cylinder 11 continues to move forward as it is, when the work W is pressed by the pressing action of the punch 18 via the rivet R, for example, the work W is rotated by the rotary sub-table 65 in the turntable device 50. Slide backward. Then, the safety assisting means 20 detects this and stops the forward movement by the die cylinder 11 and retreats, and at the same time, stops the operation of the devised device. After that, the device is restarted by turning on the switch after the inspection by the operator.

[0025]

[Effect of device]

 The present invention is configured as described above, and therefore, when the brake lining L is attached and fixed to the brake shoe body S 1 via the rivet R, the rivet holding shaft 12 of the die mechanism 10 has a defective rivet. When R is sucked and held in an irregular posture, or when the rivet holes H of the brake shoe body S and the brake lining L of the workpiece W do not match, the rivet hole H remains in place. When the rivet R is abutted against the periphery without being inserted forward, the suction holding of the rivet R can be released, and at the same time, the die mechanism 10 can be retracted to prevent the brake lining L from being damaged. Further, even when the timing of the setting function is not smoothly relayed due to the pressure drop of the suction air and the die mechanism 10 advances as it is, an abnormality occurs that pushes and retracts the rotary sub-table 65 of the turntable device 50 through the work W. Occasionally, this is detected by the safety assisting means 20, the die mechanism 10 is retracted, and at the same time the operation is stopped to prevent damage to the work W and restart after inspection by the operator.

That is, in this invention, the rivet R is inserted into the rivet hole H of the rake W set and fixed on the rotary sub-table 65 of the turntable device 50, and the dying mechanism 10 and the hammer mechanism 40 are inserted. This is because the shock absorbing means 15 is attached to the rivet holding shaft 12 of the die mechanism 10 when the tip of the rivet R is crushed by the rivet R, and the turntable device 50 detects the retracting operation state of the rotary sub-table 65. However, the safety assisting means 20 for stopping the forward movement by the die cylinder 11 and stopping the backward movement at the same time as stopping the operation of the devised device is additionally provided.

The shock absorbing means 15 has a float body 17 which is elastically urged so as to project forward and is installed inside the tip of the main body of the rivet holding shaft 12, and a punch 18 which adsorbs the rivet R on the tip surface is used as an intake source 14. Since the rivet R is defective and the rivet hole H in the work W is not aligned, the impact is generated when the work W is struck because the rivet R is a defective product. Is absorbed by the elastic retreat of the float body 17, so that the work W is not damaged. At the same time, it is detected that a pressure drop of the suction air has occurred due to the work W coming off due to the collision, and the die cylinder 11 retracts it, so that the rivet R is defective and the rivet hole H does not match. The rivet tightening for the work W or the like is immediately stopped, and the rivet R newly supplied starts the tightening operation again so that the work can be efficiently performed.

Further, the safety assisting means 20 is composed of a reflection type photoelectric sensor on the side surface of the rotary sub-table 65, which reflects the detection light aiming at the starting point where the rotary sub-table 65 slides backward. As a result of the rivet holding shaft 12 being moved to the forward end position by the operation of the die cylinder 11, for example, the rotary sub-table 65 is slid backward by pressing the work W by the pressing action of the punch 18 via the rivet R. The safety assisting means 20 for detecting this also stops the forward movement of the die cylinder 11 and retreats it, and at the same time stops the operation of the device of the present invention. Therefore, when the operation is stopped, it can be recognized that the operation is defective due to the defective rivet R or the work W of the rivet hole H that does not match, so that the operator must inspect it. When the switch is turned on after the completion, the device of the present invention can be restarted, and it is possible to prevent the work W from being damaged or the wasteful work to be continued.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of an essential part in an embodiment of the present invention.

FIG. 2 is a sectional view of the same main portion.

FIG. 3 is a side view of the entire riveting machine.

FIG. 4 is a plan view of the same.

[Explanation of symbols]

H rivet hole R rivet S Brake shoe body L Brake lining 1 Base 2 Upper base 10 Die mechanism 11 Die cylinder 12 Rivet holding shaft 13 Intake port 14 Intake source 15 Impact absorbing means 16 Return spring 17 Float body 18 Punch 19 Fixing screw 20 Safety assisting means 30 Rivet supplying device 40 Hammer mechanism 43 Rivet hammer 50 Turntable device 51 Fixed lifting table 56 Rotating main table 65 Rotating sub-table 90 Work fixing means 95 Work holding means

Claims (5)

[Scope of utility model registration request] 1. A turntable device for supporting and fixing a work to be riveted so that the work can be rotated and lifted up and down and set in a horizontal position, and a die cylinder in a state where rivets that are sequentially supplied are suction-supported through a rivet holding shaft. In the riveting machine equipped with a die mechanism that inserts and holds the workpiece at a predetermined position by the forward movement operation and a hammer mechanism that crushes the tip of the rivet inserted in the workpiece, the rivet holding shaft of the die mechanism is A riveting machine having absorbing means attached. 2. The shock absorbing means comprises a float body, which is elastically urged so as to project toward the front, at the tip of the rivet holding shaft body, and a punch for adsorbing the rivet to the tip surface is connected to an intake source. The riveting machine according to claim 1, wherein the riveting machine is connected to the front end. 3. The riveting machine according to claim 1 or 2, wherein the rivet is moved backward by the die cylinder when the rivet is dropped by the shock absorbing means. 4. A turntable device for supporting and fixing a work to be riveted so that the work can be rotated and lifted up and down and set in a horizontal position, and a die cylinder in a state in which rivets sequentially supplied are suction-supported through a rivet holding shaft. In a riveting machine equipped with a die mechanism that inserts and holds the work in a predetermined position by the forward movement of the work, and a hammer mechanism that crushes the tip of the rivet inserted into the work, the work is placed on the turntable device. The riveting machine is provided with a safety assisting means for detecting that the work on the rotating sub-table has been pushed and slid, and causing the die cylinder in the die mechanism to perform a backward movement. 5. The safety assisting means comprises a reflection type photoelectric sensor on the side surface of the rotary sub-table, which reflects detection light aiming at a starting point where the rotary sub-table slides backward. Riveting machine.