JPH04224040A - Device for fastening rivet for fixing liner in brake shoe - Google Patents

Abstract

PURPOSE:To simplify the operation at the time of fastening a rivet with flange for fixing a liner onto one face of a brake shoe and to surely execute the fastening work to the rivet by anyone. CONSTITUTION:In the method feeding the rivet from side direction, the rivet fed from a holding chuck is formed so as to feed to a counter bore hole in the liner L while holding the rivet to center with three or more pieces of rivet holding claws and making the flange the rear end. At this time, alignment suitably sets a lifting base 4 so that position of the brake shoe S and the liner L is aligned to position of feeding head arranged in the holding chuck. Then, the rivet is fastened from the reverse side with a rivet fastening machine 3.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] This invention relates to a rivet tightening device for fixing a brake shoe liner. The present invention relates to a rivet crimping device for fixing a liner of a brake shoe, which improves operability by feeding the rivet into a counterbore hole of the brake shoe and crimping the rivet.

0002

2. Description of the Related Art Conventionally, there is a so-called vertical type device for tightening a flanged rivet for fixing a liner to one surface of a brake shoe.

[0003] This device forms a mounting table on which the brake shoe is placed, and a crimping body is disposed approximately in the center of this mounting table so as to be freely retractable from below. is equipped with a rivet feeding machine that feeds the rivet, which is fed from the rivet reservoir with the flange as the rear end by an appropriate transfer means, into the counterbore hole of the liner or brake shoe with the tip guided downward. . The rivet guide structure in the rivet feeding machine is such that the rivet, which is fed from the rivet reservoir with the flange as the rear end, is dropped into a downwardly tapered guide. The rivet is positioned with its tip facing downwards, and in that state, the flat rear end of the rivet is pressed by an extruder and a liner or brake is placed as appropriate on the surface of the brake shoe placed on the mounting table. The shoe is configured to feed a rivet into a counterbore. Further, the rivet, which is thus fed into the counterbore of the liner or brake shoe and passes through the mounting hole of the brake shoe or liner, is clamped and crimped by the extruder and the crimping body.

0004

However, the crimping device formed in this manner has the following problems.

Specifically, the first problem is that the shape of the brake shoe in the case of the leading-trailing system is such that it comes into contact with the inner circumferential surface of the brake drum, so the surface on which the liner is attached should follow the inner circumferential surface of the brake drum. Because it is curved, when it is placed on the above-mentioned mounting table, the operator needs to press the curved surface with his/her hand while tightening, making it stable. There are some problems that make it difficult to work without it.

[0006] Secondly, especially in the case of brake shoes for large vehicles, the weight of the brake shoes increases.
It is very difficult for an operator to work while holding the workpiece in the unstable state with his/her hands, etc., and positioning is also difficult, requiring skill, resulting in poor work efficiency and high costs.

Furthermore, the third problem is that the brake shoes are vertical, so in the case of brake shoes for large vehicles such as those mentioned above, visibility for workers may be poor, and from this point of view as well, positioning is difficult. There were also problems that required skill.

The biggest problem is that the rivet that is sent from the rivet pool with the flange at the rear end is dropped into a downwardly tapered guide, and the narrowed guide prevents the rivet from moving. In this state, the flat rear end of the rivet is pressed by an extruder and the liner or seat of the brake shoe is positioned appropriately on the surface of the brake shoe placed on the mounting table. Since the rivet is formed to be fed into the bore hole, when the flat rear end of the rivet is pressed by the extruder, even if the rear end is pushed out by the flat end face, it will not work depending on the state of the rivet at that time. There was a problem with it being sent out crooked.

Therefore, in view of the above-mentioned problems, the present invention makes it possible for anyone to easily align the feeding position of the rivet to the brake shoe by keeping the feeding posture of the rivet in a straight state at all times. This was created with the aim of providing a device that improves work efficiency by increasing the efficiency of the work.

0010

[Means for Solving the Problems] The present invention provides a rivet tightening device for fixing a liner on a brake shoe, which tightens a rivet with a flange for fixing a liner to one surface of a brake shoe. A rivet feeder feeds the rivet from the side into the counterbore hole provided in the liner of the brake shoe, and the rivet feeder feeds the rivet into the counterbore hole of the liner and inserts the rivet into the brake shoe mounting hole. A rivet tightening machine presses and tightens the tip of the rivet that has passed through the liner from the opposite side of the liner, and a brake shoe is placed between the rivet feeding machine and the rivet tightening machine so that it can be raised and lowered, In addition, the rivet feeder has a lifting platform that can be stopped when the feed head of the rivet feeder is positioned at the height of the mounting hole provided in the brake shoe, and the rivet feeder can be moved from the rivet reservoir to an appropriate transfer means. A holding chuck that controls the rivet fed with the flange as the rear end to hold the tip in a state where it is fed into the counterbore hole of the liner, and a holding chuck that controls the rivet that is held in this feeding state to be inserted into the counterbore hole of the liner. The holding chuck is composed of an extruder that extrudes the extruded rivet to be fed into the liner, and the feeding head that guides the extruded rivet to be fed into the counterbore of the liner. A rivet passing cylinder consisting of a body, at least three or more rivet holding claws that are pivoted so that the claw ends can freely protrude and retract into the rivet passing cylinder, and a rivet passing cylinder that constantly holds the claw ends of these rivet holding claws. The above-mentioned problem has been solved by forming each claw end of the rivet holding claw to be in surface contact with the circumferential surface of the rivet when holding the rivet. It is something to be solved.

[0011]

[Operation] In the brake shoe liner fixing rivet tightening device according to the present invention, first, by raising the table, the heights of the center axis of the counterbore hole of the liner and the center axis of the feeding head are aligned. At that point, the operator pulls the brake shoe and liner toward the rivet feeder, inserts the feed head into the counterbore hole, and when the insertion is complete, presses a switch (not shown). pedal).

[0012] Then, the extruder is activated, and the rivet R sent from the rivet pool by the transfer means is
The extruder pushes the rivet into the holding chuck, and the rivet holding claw therein guides the tip of the rivet so that at least the tip is located on the central axis of the feeding head.

When the extruder continues to push the rivet, the rivet passes through the claw end portion of the rivet holding claw, which is constantly pressed in the direction of the central axis of the rivet passage tube by the elastic material. Then, the peripheral surface of the rivet is held in a state of surface contact by the rivet holding claws, so the posture of the rivet is corrected and controlled.As a result, the rivet assumes the normal feeding state posture, and is then pushed out as it is. By continuing to push with the rod, the claw ends of the rivet retaining claws are spread out to a distance that allows the flange of the rivet to pass through, and are pushed out of the feeding head. Then,
The rivet is inserted into the counterbore of the liner and passes through the brake shoe mounting hole, with the tip of the rivet protruding to the opposite side.

[0014] Therefore, the rivet caulking machine moves forward from the opposite side of the rivet feeding machine and caulks the tip of the rivet R. When caulking is completed, the rivet caulking machine automatically moves backward and the next rivet is set in the rivet feeding machine.

When this operation is completed, the operator slides the brake shoe laterally on the table, positions the feeding head provided at the tip of the holding chuck at the location of the next counterbore hole, and repeats the same procedure. The liner is successively attached to the brake shoe using rivets by repeating these operations, and once the final rivet is tightened, the table is lowered.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

That is, the reference numeral 1 shown in the figure is a rivet crimping device for crimping a rivet R with a flange F for fixing a liner L to one surface of a brake shoe S. It consists of a machine 3 and a lifting platform 4 on which brake shoes S are placed and raised and lowered.

The rivet feeder 2 is configured to feed the rivet R fed with the flange F as the rear end into the counterbore hole H1 provided in the liner L of the brake shoe S from the lateral direction. The transfer tube 31 is moved from the rivet reservoir (not shown) with the flange F as the rear end by an appropriate transfer means such as a pressure feed means using air pressure.
and a holding chuck 12 that regulates the rivet R sent through the transfer path 11 so that the tip is held in a state where it is fed into the counterbore hole H1 of the liner L, and the rivet that is held in this fed state. It is composed of an extruder 13 that extrudes R to feed it into the counterbore H1 of the liner L, and a feed head 14 that guides the extruded rivet R to be fed into the counterbore H1 of the liner L. has been done.

As shown in FIGS. 4 and 5, the holding chuck 12 is configured such that the rivet R can pass therethrough.
A rivet passage cylinder 15 is formed of a substantially cylindrical body with a diameter that allows the flange F of the rivet R to pass through with a slight gap, and a nail is formed so that the claw end 16a can freely protrude and retract into or near the rivet passage cylinder 15. At least three or more (in the illustrated case, three) rivet holding claws 16 are pivotally supported in the holding body 18 with equal distribution in the circumferential direction, and in the resilient material holding recesses 19 formed in the claw holding body 18, Claw end 16 of rivet holding claw 16
A is made of an elastic material 17 that constantly presses the rivet passage cylinder 15 in the direction of the central axis, and each claw end 1 of the rivet holding claw 16
6a are formed so as to make surface contact with the circumferential surface of the rivet R when the rivet R is held.

As seen from the side, as shown in FIG. 5, the rivet holding claw 16 projects into the rivet passage cylinder 15 or near the front thereof, and directs the rivet R toward the central axis of the rivet passage cylinder 15. It has a guide surface 16b that narrows to provide guidance, and its claw end 16a is not sharp and has a slight width. When viewed from the front, as shown in FIG. 4, the claw end 16a has a rivet R. It is formed in an arc shape so as to make surface contact along the circumferential surface of the rivet R when held.

The holding chuck 12 formed in this manner is provided with the feeding head 14 in front of which the rivet R is fed out, and this feeding head 14 is connected to the claw holder 18 in the illustrated case. is integrally formed. However, since the feeding head 14 is always located in front of the feeding chuck 12, it can become a consumable item.
It is preferable to form it so that it can be removably fitted into or externally fitted to the 8.

As shown in FIG. 1, the extruder 13 for extruding the rivet R held by the holding chuck 12 transmits the pressing force of the pneumatic cylinder 20 to the extrusion rod 22 via the toggle 21, and the extrusion rod The tip portion of 22 is formed into an elongated rod that can be passed through the rivet passage tube 15, and the rivet R in the rivet passage tube 15 is pushed out by this tip portion, and the rivet R is held by the holding chuck 12 during the extrusion process. The posture of the rivet R is controlled, and in this state, the rivet R is sent out through the feeding head 14. At this time, the extruder 13 and the holding chuck 12 are connected by connecting the rivet passage cylinder 15 to a sliding part 23 on which the tip of the extrusion rod 22 of the extruder 13 is slidably disposed. The inner circumferential surface of the sliding portion 23 and the inner circumferential surface of the rivet passage tube 15 are formed so that there is no level difference.

On the other hand, a rivet tightening machine 3 is arranged opposite to the rivet feeding machine 2 formed in this way,
This rivet tightening machine 3 is fed into the counterbore hole H1 of the liner R by the rivet feeding machine 2, and the brake shoe S
Attach the tip of the rivet R that has passed through the mounting hole H2 to the liner R.
It is formed so that it can be pressed and tightened from the opposite side.

The rivet tightening machine 3 includes a tightening rod 24 that moves on the same axis as the central axis of the rivet passing cylinder 15 and the feeding head 14 in the rivet feeding machine 2.
, a sliding holding part 25 that holds the caulking rod 24 slidably in the direction of movement thereof, and a hydraulic cylinder 26 that presses the caulking rod 24 in the direction of the rivet feeder 2 . The rivet R is then crimped by the crimping rod 24 which is pressed by the hydraulic cylinder 26 and slid in the direction of the rivet feeding machine 2.

[0025] Also, the rivet feeding machine 2 and the rivet tightening machine 3
An elevating table 4 is disposed between the elevating table 4, on which the brake shoe S is placed and can be freely raised and lowered, and a rivet feeder is installed at the height of the mounting hole H2 provided in the brake shoe S. It is formed so that it can be stopped in the state where the second feeding head 14 is positioned.

The elevating table 4 includes a table 27, an elevating hydraulic cylinder 28 for elevating the table 27 in the vertical direction, and a guide portion 29 for elevating the table 27 in a horizontal state during elevating. Then, a control device such as a computer (not shown) calculates in advance the state in which the sides of the brake shoe S and liner L are placed on the table 27 according to the dimensions of the brake shoe S and liner L, and in that state. Countersink hole H of liner L
The table 27 is raised to a height where the central axis of the feeding head 1 and the central axis of the feeding head 14 coincide with each other.

The rivet tightening device 1 is formed by installing the rivet feeding machine 2, rivet tightening machine 3, and elevating table 4 formed in this manner on the base 30, respectively.

In the rivet setting device 1 thus formed, first, by raising the table 27, the height between the center axis of the counterbore hole H1 of the liner L and the center axis of the feeding head 14 is adjusted. When they match, the operator pulls the brake shoe S and the liner L toward the rivet feeder 2 and inserts the feed head 14 into the counterbore hole H1, and when the insertion is completed, presses a switch (not shown). pedal).

Then, the extruder 13 is activated, and the rivet R sent from the rivet reservoir to the rivet passage cylinder 15 by the transfer means via the transfer tube 31 and the transfer path 11 is transferred to the holding chuck by the extrusion rod 22. 12, the tip of the rivet R is guided by the guide surface 16b of the rivet holding claw 16 there, and at least the tip of the rivet R is pushed into the rivet passage tube 15 and the feeding head 1.
It comes to be located on the central axis of 4.

Then, if the pushing rod 22 continues to push the rivet passage tube 1, the elastic material 17 will keep the rivet passage tube 1
The rivet holding claw 16 is pressed in the direction of the center axis of 5.
The rivet R passes through the claw end 16a. Then, the circumferential surface of the rivet R is held in a state of surface contact by the rivet holding claws 16, so the posture of the rivet R is corrected and controlled, and thereby the rivet R assumes the normal feeding state posture. , by continuing to push with the pushing rod 22, the claw end 16 of the rivet holding claw 16 is pushed up to the interval where the flange F of the rivet R passes.
a is expanded and extruded from the feeding head 14. Then, the rivet R is inserted into the counterbore hole H1 of the liner L, passes through the mounting hole H2 of the brake shoe S, and the tip of the rivet R protrudes to the opposite side.

Then, the tightening rod 24 of the rivet tightening machine 3 moves forward from the opposite side of the rivet feeder 2 and pushes out the push rod 2.
The tip of the rivet R is tightened by the tip of the rivet R.

When the caulking is completed, the caulking rod 24 is automatically retracted, the pushing rod 22 is also retracted, and the next rivet R is set in the rivet feeder 2.

When this operation is completed, the operator slides the brake shoe S laterally on the table 27,
Align the feed head 14 provided at the tip of the holding chuck 12 to the next counterbore hole H1, repeat the same operation again, and sequentially attach the liner L to the brake shoe S using the rivet R, and then attach the liner L to the brake shoe S with the final rivet. After tightening R, the table 27 is lowered.

At this time, the lifting stop position of the table 27 is appropriately set as described above, but in order to ensure safety, the extruder 1 must be stopped after the table 27 has been raised.
3 to prevent the rivet R from being pushed out, and to prevent the caulking rod 24 from moving forward unless the brake shoe S is placed on the table 27 in a suitable state. Sensors etc. are installed.

It goes without saying that the present invention is not limited to the embodiments described above.

[0036]

The present invention constructed as described above provides a rivet tightening device 1 for fixing a liner L of a brake shoe S, which tightens a rivet R with a flange F for fixing the liner L to one surface of the brake shoe S. , the rivet R sent with the flange F as the rear end is attached to the brake shoe S.
A rivet feeding machine 2 feeds the rivet from the side into the counterbore hole H1 provided in the liner L, and the rivet feeder 2 feeds the rivet into the counterbore hole H1 of the liner L to form the mounting hole of the brake shoe S. Rivet tightening machine 3 that presses and tightens the tip of the rivet R that has passed through H2 from the opposite side of the liner R
The brake shoe S is placed between the rivet feeding machine 2 and the rivet tightening machine 3, and is movable up and down. The rivet feeding machine 2 consists of a lifting platform 4 that can be stopped when the feeding head 14 of the rivet feeding machine 2 is positioned.
The holding chuck 12 controls the rivet R sent from the rivet reservoir by an appropriate transfer means with the flange F as the rear end so that the leading end is fed into the counterbore hole H1 of the liner L, and this feeding chuck 12. An extruder 13 that pushes out the rivet R held in the closed state so as to feed it into the counterbore H1 of the liner L, and an extruder 13 that guides the extruded rivet R so that it is fed into the counterbore H1 of the liner L. Feed head 1
4, and the holding chuck 12 includes a rivet passage tube 15 made of a substantially cylindrical body through which the rivet R can pass, and a claw end 16a pivotably supported within this rivet passage tube 15 so that it can freely protrude and retract. At least three or more rivet holding claws 16
and a resilient material 17 that constantly presses the claw ends 16a of these rivet holding claws 16 in the direction of the central axis of the rivet passage cylinder 15.
Therefore, each claw end 16a of the rivet holding claw 16 is formed to make surface contact with the circumferential surface of the rivet R when holding the rivet R, so that the claw ends 16a are fed with the flange F as the rear end. When the rivet R passes through the claw end 16a of the rivet holding claw 16, which is constantly pressed in the direction of the central axis of the rivet passage cylinder 15 by the elastic material 17 in the holding chuck 12, the rivet R passes through the claw end 16a of the rivet holding claw 16. Since the peripheral surface of the rivet R is held in a state of surface contact, the posture of the rivet R is corrected and controlled, and the rivet R is directed toward the counterbore hole H1 of the liner L of the brake shoe S into which it is fed. The rivet is held in a straight state with the tip facing forward, and is then pushed out by a rivet feeding machine 2 and can be crimped by a rivet crimping machine 3.

This work is carried out using the elevating table 4, with the feed head 14 of the rivet feeder 2 positioned at the height of the mounting hole H2 provided in the brake shoe S to attach the brake shoe S and the liner L. Since the rivet R is set to 1, it has excellent workability even with heavy brake shoes S and liner L, so it is possible to easily feed and tighten the rivet R without requiring any skill. .

Furthermore, since each of these operations can be controlled by a computer, the rivet R can be automatically fed and tightened by operating a single switch.

As described above, according to the present invention, the rivet is always fed in a straight position, and the rivet is fed in the horizontal direction. Moreover, since the above-mentioned lifting platform is provided, the brake is not required when feeding the rivet. This provides various excellent effects such as allowing anyone to easily align the position of feeding the rivet into the shoe and greatly improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of an embodiment of the present invention.

FIG. 2 is a front sectional view of the rivet feeding device.

FIG. 3 is a plan cross-sectional view of a main part showing a crimped state.

FIG. 4 is a front view of the holding chuck.

FIG. 5 is a sectional view taken along the line A-A in FIG. 4;

[Explanation of symbols]

1 Rivet tightening device 2 Rivet feeding machine 3 Rivet tightening machine 4 Lifting platform 11 Transfer route 12 Holding chuck 13　Extruder 14 Infeed head 15 Rivet passage tube 16 Rivet holding claw 16a Claw end 16b Guide surface 17 Repellent material 18 Claw holder 19 Resilient material holding recess 20 Pneumatic cylinder 21 Toggle 22 Extrusion rod 23 Sliding part 24 Tightening rod 25 Sliding holding part 26 Hydraulic cylinder 27 Table 28 Lifting hydraulic cylinder 29 Guide part 30 Base 31 Transfer tube F Flange H1 counterbore hole H2 Mounting hole L liner R Rivet S Brake shoe

Claims (1)

[Claims] Claim 1: A rivet tightening device for fixing a liner on a brake shoe, which tightens a rivet with a flange for fixing a liner to one surface of a brake shoe. A rivet feeding machine feeds the rivet from the side into the counterbore hole provided in the liner, and the tip of the rivet that is fed into the liner counterbore hole by this rivet feeder machine and passes through the brake shoe mounting hole is inserted into the liner. A rivet tightening machine that tightens by pressing from the opposite side of the rivet, and a brake shoe placed between the rivet feeder and the rivet tightening machine so that the brake shoe can be raised and lowered freely, and The rivet feeder consists of a lifting platform that can be stopped when the feed head of the rivet feeder is positioned at the height of the mounting hole, and the rivet feeder is fed from the rivet reservoir with the flange as the rear end by an appropriate transfer means. A holding chuck that controls the rivet so that its tip is held in a state where the tip is fed into the counterbore hole of the liner, and an extruder that pushes out the rivet held in this feeding state so that it is fed into the counterbore hole of the liner. The holding chuck includes a rivet passing tube made of a substantially cylindrical body through which the rivet can pass, and the feeding head that guides the extruded rivet to be fed into the counterbore hole of the liner. , at least three or more rivet holding claws that are pivotally supported in the rivet passing cylinder so that their claw ends can freely protrude and retract, and a bullet that constantly presses the claw ends of these rivet holding claws in the direction of the central axis of the rivet passing cylinder. A rivet crimping device for fixing a brake shoe liner, characterized in that the rivet holding claw is made of a repellent material and each claw end of the rivet holding claw is formed so as to come into surface contact with the circumferential surface of the rivet when holding the rivet. .