JP2001121357A - Mounting method and mounting device for boot band - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow easy mating of a projection for caulking formed on a boot band and a caulking pawl, to avoid slide of the boot band during caulking operation, and to allow coping with inferior caulking easily. SOLUTION: A rubber boot covering a constant velocity joint part provided on a drive shaft of a vehicle such as an automobile is fastened and fixed by an annular metal boot band. A projection for caulking is formed at a part of the boot band in a circumference direction and the boot is caulked by plastically deforming the projection with a pair of caulking pawls 51, 53. When a work W is set on a device, the upper side-caulking pawl 51 is widely opened against the lower side-caulking pawl 53. After setting the work W, a slide bar 77 moves forward by a forward movement of an extension head 67, with those movement, the upper side caulking pawl 51 moves to a position described with solid lines from a position described with chain double-dashed lines to temporarily hold the projection for caulking, and caulking is done with more forward movement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot having an annular boot band attached to an outer peripheral surface of a boot covering a predetermined portion of a work, and applying a pressure to a crimping projection formed on the boot band by a pair of caulking claws. The present invention relates to a method and an apparatus for mounting a boot band to be tightened.

[0002]

2. Description of the Related Art Rubber boots are used to cover a constant velocity joint provided on a drive shaft of a vehicle such as an automobile. A rubber boot band formed by annularly forming the rubber boots is used. Conventionally, a method of fastening and fixing is known (for example, Japanese Patent Laid-Open No.
No. 87).

FIG. 10 shows a method of attaching an annular boot band 5 made of metal to a rubber boot 3 covering a constant velocity joint of the drive shaft 1. The boot band 5 has a crimping protrusion 7 formed in advance in a part in the circumferential direction, and a caulking operation is performed on the crimping protrusion 7 by a pair of crimping claws 9.

A pair of caulking claws 9 are rotatably supported by a support shaft 11, and a wedge-shaped extension head 15 mounted on an air cylinder 13 is moved to a claw 9 at a tip end.
By pressing between the caulking claws 9 on the side opposite to the a, the both claw portions 9a plastically deform the caulking protrusion 7 with an equal pressure,
As a result, the boot band 5 has a reduced circumference and tightens the boot 3 to be attached to the drive shaft 1.

In the boot band 5 described above, both ends of the band-shaped member are welded and fixed to form a ring at a portion not shown, or an engaging projection provided at one end is provided at the other end. Processing such as fixing by engaging with the engagement hole is performed.

[0006]

By the way, before the caulking operation, that is, before the extension head 15 is pushed between the caulking claws 9, the pair of caulking claws 9 is clawed by an elastic means such as a spring. 9
a are slightly separated from each other, and it is necessary to set the caulking projection 7 at the center between the slightly opened claws 9a. For this reason, the claw 9a of the caulking projection 7
It is difficult to adjust the position of the
Is shifted to the caulking operation as it is, there is a possibility that the boot band 5 may shift, and improvement is desired. Further, the quality assurance of the swaged portion depends on the control of the original pressure by the air cylinder 13, and therefore cannot sufficiently cope with the occurrence of a swage failure or the like.

In view of the above, the present invention makes it easy to position the crimping projection on the boot band with the caulking claw, and can avoid the displacement of the boot band in performing the subsequent caulking operation, thereby preventing the occurrence of defective caulking or the like. The purpose is to be able to easily deal with the problem.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, an annular boot band is attached to an outer peripheral surface of a boot covering a predetermined portion of a work, and the boot band is formed. In a method of mounting a boot band, in which a caulking projection is tightened by applying pressure with a pair of caulking claws, one of the caulking claws is arranged at a position away from the other, and the caulking projection is provided on the other caulking claw. Is set, the one caulking claw is brought close to the caulking projection, and the caulking projection is temporarily held down, and then a pressure is applied to the caulking projection by both caulking claws.

According to the above-mentioned method of mounting the boot band, the caulking projection can be easily set on the other caulking claw in a state where one caulking claw is widely separated from the other caulking claw. Further, since one of the caulking claws is closed to temporarily hold the caulking projection, the displacement of the boot band is avoided in performing the subsequent caulking work. In a boot band mounting device in which an annular boot band is attached to the outer peripheral surface of the boot, and the crimping projection formed on the boot band is tightened by applying pressure with a pair of caulking claws, the pair of caulking claws is the other. The caulking projection is arranged at a position where the caulking projection is set, one of which is at a set position apart from the other caulking claw, and the other is temporarily approaching the caulking projection and temporarily holding the caulking projection together with the other caulking nail. It is configured to be movable between the holding position.

[0010] According to the above configuration, in a state where one caulking nail is separated from the other caulking nail and at a set position that is greatly opened, the caulking projection is set on the other caulking nail, and then the one caulking nail is set. The caulking protrusion is brought close to the caulking protrusion and temporarily held together with the other caulking claw. From the state of the temporary holding, both caulking claws apply pressure to the caulking projection and tighten.

According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, the two caulking claws are respectively rotatable around a rotation support shaft provided at a substantially central portion in the longitudinal direction, and An extension head is inserted between the claw on the tip side and the claw on the opposite side with respect to the axis to perform the caulking operation by the claw, and one caulking claw is set by the forward / backward movement of this extension head. It is configured to move between the position and the temporary holding position.

According to the above configuration, the extension head moves forward from the set position where one of the caulking claws is separated from the other caulking claw, so that one caulking claw is brought into contact with the caulking projection on the other caulking claw. Approach and perform temporary hold. When the extension head further advances and enters between the rear end portions of both the caulking claws, the caulking operation is performed on the caulking projection by the claw portion on the front end side. When the extension head is retracted after the end of the caulking operation, one of the caulking claws is largely separated from the caulking projection and is set to the set position with the retreating movement.

According to a fourth aspect of the present invention, in the configuration of the third aspect of the invention, one of the caulking claws is movable in the same direction as the extension head moving direction and is pressed by the elastic means in the extension movement direction of the extension head. One end of the slide bar is rotatably connected, and the extension head retracts the slide bar against the elastic means immediately before the retreat limit position to move the one caulking claw from the temporary holding position to the set position. It is configured to move.

According to the above configuration, one of the caulking claws is brought into the temporary holding position by the elastic bar pressing the slide bar while the extension head is moving in the forward direction. From this temporary holding position, when the extension head retreats, the slide bar retreats against the elastic means and the extension head reaches the retreat limit position, and one caulking claw is widely opened apart from the other caulking claw. The set position of the state.

According to a fifth aspect of the present invention, in the configuration of any of the second to fourth aspects of the present invention, a sensor for detecting a distance between the two caulking claws at the time of caulking work for the caulking projection is provided.

According to the above configuration, after the end of the caulking operation, if the distance between the two caulking claws detected by the sensor is within a predetermined range, the caulking operation is normally performed.

According to a sixth aspect of the present invention, in the configuration of the fifth aspect of the invention, the sensor is provided on the other side of the caulking nail on which the caulking projection is set.

According to the above construction, the sensor provided on the other caulking claw on which the caulking projection is set detects the distance between the caulking claws at the time of caulking work by both caulking claws.

According to the first aspect of the present invention, the crimping projection of the boot band is set on the other crimping nail while one of the crimping nails is opened apart from the other crimping nail. Since the positioning of the caulking projection to the caulking nail is easy, after setting, one caulking nail is brought closer to the caulking nail, and the caulking projection is temporarily pressed between the other caulking nail. In addition, the displacement of the boot band can be avoided in performing the subsequent crimping work.

According to the second aspect of the present invention, the pair of caulking claws is disposed at a position where the other caulking projection is set, and one of the caulking claws is separated from the other caulking claw by a setting position. The caulking projection can be moved closer to the caulking claw together with the other caulking claw, so that the caulking protrusion can be easily aligned with the caulking claw, and subsequent caulking can be performed. The shift of the boot band can be avoided in performing the work.

According to the third aspect of the present invention, the extension head applies a pressure to both the caulking claws by the forward movement to perform a caulking operation on the caulking protrusion, and the extension head moves forward and backward to set the set position relative to one of the caulking claws. Since it is made to move between the temporary holding position, a driving unit dedicated to movement is unnecessary when moving this one caulking claw,
The overall configuration is simplified.

According to the fourth aspect of the present invention, when the extension head is moved in the forward direction, the slide bar is pressed by the elastic means, so that one of the swaging claws can be set to the temporary holding position. From this temporary holding position,
By the extension head retreating and reaching the retreat limit position while retracting the slide bar against the elastic means,
One caulking nail can be separated from the other caulking nail to set the set position.

According to the fifth aspect of the present invention, since the sensor for detecting the distance between the two caulking claws is provided at the time of caulking work for the caulking projection, the caulking failure or the caulking nail disengaged from the caulking projection are provided. That is, a so-called swing operation can be reliably detected, and reliability can be improved.

According to the sixth aspect of the present invention, since the sensor is provided on the other side of the caulking claw on which the caulking projection is set, the wiring of the sensor is facilitated.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the entire structure of a boot band mounting apparatus according to an embodiment of the present invention.
FIG. This boot band mounting device is similar to that shown in FIG. 10 described above. A rubber boot for covering a constant velocity joint portion provided on a drive shaft of a vehicle such as an automobile is made of a metal formed in an annular shape. It is fastened and fixed by a boot band. The apparatus main body 19 is installed on the base 17, and a pair of work clampers 21 and 23 on which a work W described later is set are mounted on the base 17 on the front side (the right side in FIG. 1) of the apparatus main body 19. Is provided.

As shown in the enlarged front view of FIG. 3, the work clampers 21 and 23 clamp and support the shafts on both sides of the boot 25 attached to the drive shaft constituting the work W. It is installed on a base plate 27 fixed on 17. As shown in FIG. 3, a receiving base 29 supporting a housing (not shown) attached to the end of the work W is provided on the base 17 on the right side of the work clamper 23 in FIG. It is installed movably.

On the base 17 behind the apparatus main body 19, a main control panel 31 for performing control such as switching the position of the receiving table 29 for each work W is provided. On the left side of the main control panel 31 in FIG.
9 is provided with a band caulking control panel 33 for controlling the operation.

As shown in FIG. 4, which is a plan view of FIG. 3, both ends of the boot 25 are fixed to the work W by a large-diameter boot band 35 and a small-diameter boot band 37. Each of the boot bands 35, 37 is placed on the band receivers 39, 41 shown in FIG. As shown in FIGS. 5 and 6, the band receivers 39 and 41 include arc-shaped receiving surfaces 39 a and 41 a that receive the respective outer peripheral surfaces of the annular boot bands 35 and 37 in close contact with each other. , 23 are fixed to a support member 45 which is supported to be vertically movable with respect to a support block 43 arranged between them. The band receivers 39 and 41 are at the raised position when the work W is not set, and are set at the lowered position when the boot bands 35 and 37 are placed after setting.

Then, the above-mentioned boot bands 35, 37
In the same manner as the conventional boot band, crimping projections 35a and 37a are formed in advance in a part of the circumferential direction, and both ends of the belt-shaped member are welded and fixed to form an annular shape, though not shown. Or a process such as engaging an engaging projection provided at one end with an engaging hole provided at the other end and fixing the same. The protrusions 35a and 37a described above
In contrast, the two caulking heads 4 shown in FIG.
The caulking operation is performed by 7 and 49, respectively.

FIG. 7 is an enlarged view of the apparatus main body 19 in FIG. 1 (however, left and right sides are reversed from FIG. 1). Each of the caulking heads 47 and 49 is formed by one caulking claw. An upper caulking claw 51 and a lower caulking claw 53, which is the other caulking claw, are provided. The caulking claws 51 and 53 are arranged in parallel to each other on both front and back sides in FIG. The rotation support shafts 57 and 59 are provided between the support plates 55.
And are rotatably supported via the.

A linear sensor 54 is attached to the lower caulking claw 53 in FIG. The linear sensor 54 has its detection portion 54a directed toward the upper caulking claw 51 in FIG. 7. By detecting the interval with the upper caulking claw 51, whether or not the caulking work is performed properly is determined. Is determined by a control circuit housed in the main control panel 31.

FIG. 8 is an enlarged view showing the details of the driving mechanism in the caulking heads 47 and 49. At the tips of the upper caulking claw 51 and the lower caulking claw 53, the protrusions of the boot bands 33 and 37 are provided. Recesses 51a and 53a are formed as claws for accommodating the protrusions 35a and 37a and plastically deforming the protrusions 35a and 37a by applying pressure from above and below.

The support plate 55 is provided with a support bar 61 at the lower part on the left side in FIG. A spring 63 for pressing the lower caulking claw 53 upward is provided on the right side of the rotation support shaft 59 of the support bar 61 in FIG. 8, and is located on the left side of the rotation support shaft 59 of the support bar 61 in FIG. Is provided with a stopper screw 65 to which the lower part of the lower caulking claw 53 can abut, protruding upward.
That is, the pressing force of the spring 63 is
, The rotation of the lower caulking claw 53 in the counterclockwise direction is restricted.

The rear side of each of the upper and lower swaging claws 51 and 53 (FIG. 8)
On the right side of the drawing, an extension head 67 that can move between near the forward limit position indicated by the solid line and near the retreat limit position indicated by the two-dot chain line is arranged. The extension head 67 is provided with a piston rod 71 of a caulking cylinder 69.
And moves between the two positions. An air device 70 for supplying air, which is a driving source of the caulking cylinder 69, is installed on the side of the base 17, as shown in FIG.

The extension head 67 has a tapered surface 67a, 67b which tapers up and down, and has a wedge shape as a whole. On the other hand, at the rear end of the portion where the extension head 67 enters the upper and lower caulking claws 51 and 53, rollers 73 and 75 that are in contact with the tapered surfaces 67a and 67b are rotatably supported.

At the upper end of the support plate 55, there is provided a slide bar 77 which is movable in the same direction as the movement direction of the extension head 67, that is, in the horizontal direction in FIG. The upper end of the connecting piece 79 is fixed to the lower part on the left end side of the slide bar 77 in the drawing, and the lower part of the connecting piece 79 is rotated via the connecting pin 81 near the rotation support shaft 57 of the upper caulking claw 51. It is connected as possible.

On the other hand, a locking portion 77a bent downward is formed at the rear end of the slide bar 77.
The slide bar 77 is provided between the
A spring 83 is provided as an elastic means for pressing the spring 83 toward the distal end side. The state shown by the solid line in FIG.
When the slide bar 77 is pushed to the left by the spring 83, the upper caulking claw 51 is pressed counterclockwise around the rotation support shaft 57, and the caulking protrusions 35a, 37a of the boot bands 35, 37. Is temporarily held between the lower caulking claw 53 and the lower caulking claw 53, and the upper caulking claw 51 in this state is set as a temporary holding position.

An operating pin 85 is provided at an upper portion of the rear end of the extension head 67 so as to protrude upward. The operating pin 85 contacts the locking portion 77a of the slide bar 77 from the left just before the extension head 67 is in the retreat limit position indicated by the two-dot chain line, and pushes the slide bar 77 against the spring 83 by the two-dot chain line. Move to the position shown. At this time, the upper caulking claw 51 is moved from the temporary holding position shown by the solid line
It is at the position shown by the two-dot chain line rotated and moved away from the camera. The position of the two-dot chain line is set as the set position.

Next, the operation of the boot band attaching apparatus having the above-described configuration will be described with reference to a time chart shown in FIG. From the state at time t ₀ , the worker manually sets the work W on the work clampers 21 and 23 and the cradle 29 at time t ₁ . Thus, the limit switch LS ₁ provided on the work clamper 21 and 23 are turned on. At this time, the large- and small-diameter boot bands 35 and 37 are attached to the work W, respectively.
41 mounted respectively band receiving 39, 41 becomes the lowered position, the limit switch LS ₂ is turned on.

In this state, the caulking projections 35a, 37a of the boot bands 35, 37 are connected to the caulking head 47,
49, and the projections 35a for crimping,
37a is set in the recess 53a of the lower caulking nail 53 with the upper caulking nail 51 in the set position shown by the two-dot chain line in FIG.

The work W described above is mounted on the work clamper 21,
When setting on the cradle 23 and the cradle 29, the crimping projections 35a, 37a of the boot bands 35, 37 are set on the crimping hands 47, 49. Since it is widely opened with respect to the caulking claw 53, it is extremely easy.

Next, press the start button the operator (not shown) of the main control panel 31 at time t _2, together with the clamping operation on the workpiece W by the work clamper 21 and 23 is made at time t ₃ (this time clamp limit switch LS ₃ side is turned on, the limit switch LS ₄ for unclamping is turned off.) extension head 67 starts forward movement from the two-dot chain line position shown in FIG. 8 caulking cylinder 69 is operated, A tightening operation is performed on the large-diameter and small-diameter boot bands 35 and 37.

When the extension head 67 moves forward, as shown in FIG. 8, the locking operation of the slide bar 77 on the locking portion 77a by the operating pin 85 is released. As a result, the slide bar 77 is pushed forward by the spring 83 and moves forward to the solid line position, whereby the upper caulking claw 51 changes from the set position shown by the two-dot chain line which is greatly opened to the temporary holding position shown by the solid line, and the concave portion 51a Boot bands 35, 3 between the upper side and the concave portion 53 a of the lower caulking claw 53.
The crimping projections 35a and 37a of No. 7 are temporarily held down. By temporarily holding the boot bands 35 and 37 during the subsequent caulking operation, the boot bands 35 and 37 are hardly displaced.
7 is avoided.

The forward extension head 67 further reaches the upper and lower at the caulking claws 51, 53 penetrate therebetween time _{t 4} the solid line position shown in Figure 8, by caulking the cylinder 69 over a time _{t 6} from the time _{t 5} The pressure is increased and the extension head 67 is further pushed forward.
At this time, the extension head 67 pushes and spreads the rear side of the caulking claws 51, 53 while the tapered surfaces 67a, 67b contact the rollers 73, 75 of the upper and lower caulking claws 51, 53, and the tip ends correspondingly. Side recesses 51a, 5
At 3a, the crimping projections 35a and 37a are plastically deformed to perform crimping work.

Thereafter, for a time T (3 seconds) from time t ₆ to time t ₇ , the pressure is maintained and the pressure is monitored.
The upper and lower crimping claws 5 at time _{t 7} the linear sensor 54
The caulking depth is measured by detecting the interval between 1,53.
If the crimping depth is within the preset proper range, the crimping work has been performed normally. On the other hand, if the crimping depth is out of the proper range, the crimping is poor or the crimping claws 51, 53 This means that a so-called idle swing operation has been performed in a state of being disengaged from the crimping projections 35a and 37a, and thus, it is possible to easily determine the quality of the crimping work. The boot band 35,
Reference numeral 37 indicates that the circumference of the work W is shortened and the boot 25 is tightened from the entire circumference, and is attached to the drive shaft constituting the work W.

[0046] After the caulking work is completed, from the time _{t 7} time _{t 8}
During the operation, the extension head 67 retreats, and immediately before the retraction limit position indicated by the two-dot chain line, the operating pin 85 abuts on the locking portion 77a of the slide bar 77, and further retreats to the two points together with the slide bar 77. When the position reaches the chain line position, the upper crimping nail 51 is set to the set position indicated by the two-dot chain line that is greatly opened with respect to the lower crimping nail 53.

Tightening the above-mentioned boot bands 35 and 37
Time t₃, T₄, T₆At the extension
Limit switch for detecting the position of the option head 67
LS ₅And LS₈, LS₆And LS₉, LS₇And
And LS₁₀Are provided respectively.

Next, work clamper at time _{t 9} 21,2
3 releases the clamping operation for the workpiece W by, by the subsequent operator manually, removing at the workpiece W time t _10, with LS ₁ is turned off, the band received 3
9,41 LS ₂ rises also turned off.

[Brief description of the drawings]

FIG. 1 is a side view showing an overall configuration of a boot band mounting device according to an embodiment of the present invention.

FIG. 2 is a front view of the boot band mounting device of FIG. 1;

FIG. 3 is an enlarged front view of a main part in a state where a work is set in the apparatus of FIG. 1;

FIG. 4 is a plan view in which a part of FIG. 3 is omitted.

FIG. 5 is an explanatory view showing a state in which a large-diameter boot band is supported by a band receiver in the boot band mounting device of FIG. 1;

FIG. 6 is an explanatory view showing a state in which the small-diameter boot band is supported by a band receiver in the boot band mounting device of FIG. 1;

FIG. 7 is an enlarged side view of a device main body in the boot band attaching device of FIG. 1;

FIG. 8 is a detailed view of a driving mechanism of a caulking head in the boot band attaching device of FIG. 1;

FIG. 9 is a time chart showing the operation of the boot band attaching device of FIG. 1;

FIG. 10 is an operation explanatory view of a boot band attaching device according to a conventional example.

[Explanation of symbols]

 W Work 25 Boot 35, 37 Boot band 35a, 37a Protrusion for caulking 51 Upper caulking claw 53 Lower caulking claw 51a, 53a Recess (claw portion) 54 Sensor 57, 59 Rotation support shaft 67 Extension head 77 Slide bar 83 Spring Elastic means)

Claims (6)

[Claims] Attachment of a boot band in which an annular boot band is mounted on an outer peripheral surface of a boot placed on a predetermined portion of a work, and a crimping projection formed on the boot band is tightened by applying pressure with a pair of caulking claws. In the method, one of the caulking claws is positioned at a distance from the other,
Set the protrusion for caulking on the other caulking claw,
A method of attaching a boot band, comprising: bringing one of the caulking claws close to the caulking protrusion to temporarily press the caulking protrusion, and then applying pressure to the caulking protrusion with both caulking claws. 2. An installation of a boot band in which an annular boot band is attached to an outer peripheral surface of a boot put on a predetermined portion of a work, and a crimping projection formed on the boot band is tightened by applying pressure with a pair of caulking claws. In the device, the pair of caulking claws is disposed at a position where the other caulking protrusion is set, and one of the caulking claws is separated from the other caulking claw, and the other is close to the caulking protrusion. A boot band mounting device, which is movable between a temporary holding position for temporarily holding a caulking projection together with the caulking claw. 3. The two caulking claws are rotatable about a rotation support shaft provided at a substantially central portion in a longitudinal direction, respectively.
An extension head is inserted between the claw portions on the tip side and the opposite side of the claw portion on the side of the rotation support shaft to perform a caulking operation by the claw portion, and one caulking operation is performed by the forward / backward operation of the extension head. 3. The boot band mounting device according to claim 2, wherein the pawl is moved between a setting position and a temporary holding position. 4. An end of a slide bar, which is movable in the same direction as the extension head moves and is pressed by an elastic means in a forward movement direction of the extension head, is rotatably connected to one of the caulking claws. 4. The boot according to claim 3, wherein the head moves the one of the caulking claws from the temporary holding position to the set position by retracting the slide bar immediately before the retreat limit position against the elastic means. Band mounting device. 5. The boot band mounting device according to claim 2, further comprising a sensor for detecting an interval between both of the caulking claws during a caulking operation on the caulking protrusion. 6. The boot band mounting device according to claim 5, wherein the sensor is provided on the other side of the swaging claw on which the swaging protrusion is set.