JP2012225413A - Small-diameter band temporary attachment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary attachment technology that can automate temporary attachment, even if a band is tight and small in diameter.SOLUTION: The small-diameter band 56 is located immediately above a small-diameter part 47 of a flexible joint boot. The small-diameter band 56 is fit to the small-diameter part 47 by descending a band descending member 21 while keeping a boot gripping piece 31 and a band gripping piece 25 static from this state. According to this invention, a boundary of the boot 46 is supported by a small-diameter supporting member 53 from the inside so as to withstand a pressing force, and the small-diameter band 56 is fit while supporting the inner peripheral surface of the small-diameter part 47 by the boot gripping piece 31 so as not to be flattened, and thus temporary attachment work can smoothly be performed. A small-diameter band temporary attachment process which has been performed manually hitherto can be automated.

Description

  The present invention relates to a small-diameter band temporary attachment device for temporarily attaching a small-diameter band to a small-diameter portion of a universal shaft boot.

  FIG. 9 is a cross-sectional view of the universal shaft joint. A cup portion 103 is attached to an end portion of the shaft 101 via a joint portion 102, and the shaft portion 104 is extended from the cup portion 103. Call it. Since the shaft portion 104 can be inclined with respect to the shaft 101, it is preferably used for a drive shaft of a vehicle. Among the universal shaft joints, a joint in which the rotation speed of the shaft 101 and the rotation speed of the shaft portion 104 are completely the same is called a constant velocity joint. That is, the universal shaft joint is a general term for constant velocity joints and the like.

  The boot 105 is passed to the shaft 101 and the cup portion 103 so that foreign matter does not enter the joint portion 102. The boot 105 includes a small diameter portion 106, a large diameter portion 107 having a larger diameter than the small diameter portion 106, and a conical portion 108 that connects the large diameter portion 107 and the small diameter portion 106. The conical part 108 has a bellows structure to provide flexibility.

  It is necessary to prevent the boot 105 from being detached from the shaft 101 or the cup portion 103. Therefore, a structure is adopted in which the small diameter portion 106 is reduced in diameter by the small diameter band 111 and is strongly bound to the shaft portion 101, and the large diameter portion 107 is reduced in diameter by the large diameter band 112 and is strongly bound to the cup portion 103.

The procedure for attaching the small-diameter band 111 that has been conventionally performed is as follows.
The small-diameter band 111 is lightly fitted to the small-diameter portion 106 with a single boot 105 (temporary attachment process). This temporary attachment process has been performed manually.
Next, the small-diameter portion 106 is attached to the shaft 101, and the small-diameter band 111 is caulked strongly (main attachment process). This main attachment process has been carried out manually using a tool or by a machine.

  Manual work is desired to be mechanized from the viewpoint of improving productivity. Therefore, a technique capable of automating the temporary attachment process and the main attachment process has been developed and put into practical use (for example, see Patent Document 1 (FIG. 8)).

Patent document 1 is demonstrated based on the following figure.
FIG. 10 is a diagram for explaining the basic principle of the prior art. In FIG. 10A, a boot band 113 is fitted to the small diameter portion 106 or the large diameter portion 107 by a robot hand or the like. Since this boot band 113 has an inner diameter sufficiently larger than the outer diameter of the object, it fits easily.

(B) is the appearance of the temporary attachment step, and there are large gaps 114, 114 between the small diameter portion 106 or the large diameter portion 107 and the boot band 113. Then, the bent piece 115 extends outward.
In (c), the bent piece 115 is pulled with a robot hand or the like and bent by about 180 ° (main attachment step). As a result, the boot band 113 is reduced in diameter and is strongly bound to the shaft 101 or the cup portion 103.

Since the bent piece 115 is provided, the large gaps 114 and 114 in (b) can be made zero.
However, it is not preferable that the bent piece 115 remains on the rotating body. In order to remove the bent piece 115 after the main attachment step, a bent piece excision step is required, which increases the number of steps.

  On the other hand, attention is paid to a boot band whose inner diameter is substantially the same as the outer diameter of the small diameter portion 106 or the large diameter portion 107. This is because there is no need to provide a bent piece since the diameter reduction allowance is small, and this attachment process is simplified.

However, in such a boot band, since there is almost no gap between the outer diameter of the small diameter portion 106 or the large diameter portion 107, the temporary attachment process must be performed manually.
However, as productivity improvement is demanded, it is desired to automate the temporary attachment process even for a tight boot band.

Japanese Patent No. 3175605

  This invention makes it a subject to provide the temporary attachment apparatus which can automate temporary attachment even if it is a tight small diameter band.

The invention according to claim 1 is directed to a universal shaft joint boot comprising a small diameter portion, a large diameter portion larger than the small diameter portion, and a conical portion connecting the large diameter portion and the small diameter portion, A small-diameter band temporary attachment device for temporarily attaching a small-diameter band to the small-diameter portion,
A boot platform for supporting the boot so that the shaft is vertical and the small diameter portion is on the top;
A small-diameter portion supporting member that passes through the boot platform and moves up and down in the vertical direction, and supports a boundary portion between the small-diameter portion and the conical portion from below;
A boot positioning member that penetrates the small diameter portion supporting member and moves up and down in the vertical direction, and determines the horizontal position of the boot by fitting into the small diameter portion;
A moving member that moves vertically and horizontally with respect to the boot platform;
An elevating member provided on the moving member so as to be movable up and down;
A plurality of band gripping pieces which are swingably provided on the elevating member and are inserted inside the small-diameter band;
A band gripping piece swinging mechanism that swings these band gripping pieces and presses the inner surface of the small-diameter band;
A plurality of boot gripping pieces which are swingably provided on the elevating member and are inserted into the inside of the small diameter portion and the boundary portion between the small diameter portion and the conical portion;
A boot gripping piece swinging mechanism for swinging these boot gripping pieces and pressing the inner peripheral surface of the small diameter portion;
A band push-down member provided on the moving member to push down the band;
The boot positioning member performs horizontal positioning of the boot, and the boot gripping piece supports the boundary portion with the small diameter portion supporting member while suppressing the inner peripheral surface of the small diameter portion. In this state, the small diameter band is the small diameter portion. And a control unit that controls the lowering of the band push-down member until it is fitted.

According to the first aspect of the present invention, the boot holding piece suppresses the inner peripheral surface of the small diameter portion while supporting the boundary portion with the small diameter portion supporting member, and in this state, the small diameter band is fitted to the small diameter portion by the band push-down member.
The small-diameter band can be smoothly fitted without deformation of the small-diameter portion.
According to the present invention, it has become possible to automate the small-diameter band temporary attachment process that has been entrusted to human hands. As a result, productivity can be greatly improved.

It is a principle figure of the small diameter and large diameter band temporary attachment equipment including the small diameter band temporary attachment apparatus of this invention. It is a principal part enlarged view of the small diameter band temporary attachment apparatus of this invention. FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2. It is an enlarged view of a boot positioning member and a small diameter part support member. It is a block diagram of a small diameter band. It is a figure explaining carrying in of a small diameter band. It is a figure explaining fitting of a small diameter band. It is a figure explaining carrying out of boots. It is sectional drawing of a universal shaft coupling. It is a figure explaining the basic principle of the prior art.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

Embodiments of the present invention will be described with reference to the drawings.
First, a small-diameter / large-diameter band temporary attachment facility including the small-diameter band temporary attachment apparatus of the present invention will be described.
As shown in FIG. 1, the small-diameter / large-diameter band temporary attachment facility 10 includes a base 11 laid horizontally, a small-diameter band temporary holder 12 standing on the base 11, and the small-diameter band temporary holder 12. The small-diameter band temporary attachment device 20 of the present invention provided adjacent to the small-diameter band, the large-diameter band temporary attachment device 60 provided adjacent to the small-diameter band temporary attachment device 20, and the columns 13 and 13 standing on the base 11. A rail 14 that is supported and extends horizontally, a slider 15 that moves horizontally along the rail 14 from the small-diameter band temporary mount 12 to the large-diameter band temporary attachment device 60 via the small-diameter band temporary attachment device 20, and the slider 15 and a moving member 16 that is vertically movable and horizontally moved, and a lifting / lowering series that spans the moving member 16 and the slider 15 to move the moving member 16 up and down. And da 17, and a control unit 18 which controls collectively the components.

The structure of the small band temporary attachment device 20 of the present invention will be described with reference to FIGS.
As shown in FIG. 2, the small-band temporary mounting device 20 is attached to the moving member 16 so as to be movable up and down at a position above the band pressing member 21 and a band pressing member 21 that projects horizontally from the lower part of the moving member 16. The elevating member 22, the sub elevating cylinder (FIG. 1, 23) passed to the elevating member 22 and the moving member 16 to elevate the elevating member 22, and the elevating member 22 are swingably stopped by a horizontal pin 24. A band gripping piece 25 that extends downward, a first driver 26 that is disposed downward in the center of the lifting member 22 to swing the band gripping piece 25 toward the diameter-expanded side of the band, and lifts and lowers the first driver 26. A first cylinder 27 to be moved, a first compression spring 28 passed over the lifting member 22 and the band gripping piece 25 for swinging the band gripping piece 25 toward the reduced diameter side of the band, and a lifting part A boot gripping piece 31 that is supported by a horizontal pin 29 so as to be swingable and extends downward, and a second that is disposed downward in the center of the elevating member 22 so as to swing the boot gripping piece 31 toward the diameter expansion side of the boot. A driver 32, a second cylinder 33 for raising and lowering the second driver 32, and a second compression spring 34 passed to the elevating member 22 and the boot gripping piece 31 for swinging the boot gripping piece 31 toward the reduced diameter side of the boot With.

  In this example, the first driver 26 and the first cylinder 27 constitute the band gripping piece swing mechanism 35. When the first screwdriver 26 is lowered, the pointed portion 36 at the tip pushes the projection 37 on the band gripping piece 25 side, so that the band gripping piece 25 swings clockwise in the drawing. When the first driver 26 is raised, the band gripping piece 25 swings counterclockwise by the biasing action of the first compression spring 28.

  Similarly, the second grip 32 and the second cylinder 33 constitute a boot gripping piece swing mechanism 38. When the second driver 32 is lowered, the tapered portion 39 at the tip pushes the roller 41 on the boot gripping piece 31 side, so that the boot gripping piece 31 swings counterclockwise in the drawing. When the second driver 32 is raised, the boot gripping piece 31 swings clockwise in the drawing due to the biasing action of the second compression spring 34.

As shown in FIG. 3, the band push-down member 21 includes a central hole 42, a long hole 43 that extends radially from the central hole 42, and a long hole 44 that is wider than the long hole 43 and extends radially from the central hole 42. Is provided. The band gripping piece 25 is movably accommodated in the narrow hole 43 and the boot gripping piece 31 is movably accommodated in the wide hole 44 having a wide width.
Since the diameter of the central hole 42 is smaller than the diameter of the small-diameter band, the small-diameter band can be pushed by the V-shaped portion 45.

  As shown in FIG. 4 (a), the small-diameter band temporary attachment device (FIG. 2, reference numeral 20) is arranged so that the shaft (center axis) is vertical and the small-diameter portion 47 of the boot 46 is on top. The large-diameter portion 48 is at the bottom and the conical portion 49 is in the shape of a letter C. The boot platform 51 that supports the boot 46 and the boot platform 51 as shown in FIG. A small-diameter support member 53 that supports the boundary 52 between the small-diameter portion 47 and the conical portion 49 from below, and a small-diameter support member 53 that moves vertically through the small-diameter portion support member 53 and fits into the small-diameter portion 47. And a boot positioning member 54 that determines the position of the boot 46 in the horizontal direction.

  As shown in FIG. 5A, the small-diameter band 56 has one U-shaped ear portion 57. As shown in (b), when the ear portion 57 is plastically deformed into an Ω shape by the tool 58, the inner diameter Db becomes smaller.

(A) shows the form of the small diameter band 56 at the time of a temporary attachment process, and the internal diameter Da approximates the outer diameter of the small diameter part of a boot. During the temporary attachment process, the inner diameter Da does not change.
This attachment process starts with (a) and ends with (b). That is, in this attachment process, the small diameter portion is strongly fastened to the shaft by reducing the inner diameter from Da to Db. Db = Da−2 · Δd.
Since the present invention provides an apparatus for temporary attachment, only the small-diameter band 56 shown in FIG.

Next, the operation of the small-diameter band temporary attachment device configured as described above will be described.
As shown in FIG. 6A, the boot 46 on the boot platform 51 is positioned by the boot positioning member 54. At the same time, while holding the small-diameter band 56 with the band gripping pieces 25 (one is visible in the figure, but three are arranged at a pitch of 120 °), the boot positioning member 54 can be Let it face directly above. Then, the moving member 16 is lowered.

  Then, as shown in (b), the small-diameter band 56 reaches directly above the small-diameter portion 47. At the same time, the boot gripping piece 31 enters the small diameter portion 47 while pushing down the boot positioning member 54.

FIG. 7A shows only the boot gripping piece 31, and the boot gripping piece 31 hits the inner peripheral surface 47 a of the small diameter portion 47. Further, the boundary portion 52 of the boot 46 is supported by the small diameter portion supporting member 53.
(B) is a view showing only the band gripping piece 25, and the small-diameter band 56 is directly above the small-diameter portion 47. (A), (b) shows the form at the same timing.

  From this state, the band push-down member 21 is lowered while the boot grip piece 31 and the band grip piece 25 remain stationary. Then, as shown in (c), the small-diameter band 56 is fitted into the small-diameter portion 47.

  The small diameter portion 47 is made of elastic rubber or soft resin. Since the so-called waist is weak, if the small-diameter band 56 having substantially the same diameter is fit into the small-diameter portion 47 without supporting it, the small-diameter portion 47 becomes flattened or buckles (wavy by pressing force). As a result, the small diameter band 56 cannot be fitted into the small diameter portion 47.

  In that respect, in the present invention, as shown in FIGS. 7A to 7C, the boundary portion 52 of the boot 46 is supported by the small-diameter portion supporting member 53 so as to withstand the pushing force, and the small-diameter portion is not flattened. Since the small-diameter band 56 is fitted while the inner peripheral surface of 47 is supported by the boot gripping piece 31, the temporary attachment work can be performed smoothly.

As shown in FIG. 8, the boot 46 that has been temporarily attached (temporary attachment step) is lifted and horizontally moved while being held by the band holding piece 25 (FIG. 1, reference numeral 60). Move to.
Since the operations described above are collectively performed by the control unit (FIG. 1, reference numeral 18), temporary mounting can be automated even with the tight small-diameter band 56.

  The present invention is suitable for a boot attached to a universal shaft joint for a vehicle, but may be applied to a boot attached to a universal shaft joint for a general machine.

  The present invention is suitable for a boot attached to a universal shaft joint for a vehicle.

  DESCRIPTION OF SYMBOLS 10 ... Small diameter and large diameter band temporary attachment equipment, 16 ... Moving member, 18 ... Control part, 20 ... Small diameter band temporary attachment apparatus, 22 ... Lifting member, 46 ... Boot, 47 ... Small diameter part, 47a ... Inner circumference of small diameter part 48: Large diameter portion, 49: Conical portion, 51: Boot mount, 52 ... Border between small diameter portion and conical portion, 53 ... Small diameter support member, 54 ... Boot positioning member, 56 ... Small diameter band, 57 ... Ear.

Claims (1)

A universal joint boot comprising a small-diameter portion, a large-diameter portion larger than the small-diameter portion, and a conical portion connecting the large-diameter portion and the small-diameter portion is a work object, and a small-diameter band is attached to the small-diameter portion. A small diameter band temporary mounting device for temporary mounting,
A boot platform for supporting the boot so that the shaft is vertical and the small diameter portion is on the top;
A small-diameter portion supporting member that passes through the boot platform and moves up and down in the vertical direction, and supports a boundary portion between the small-diameter portion and the conical portion from below;
A boot positioning member that penetrates the small diameter portion supporting member and moves up and down in the vertical direction, and determines the horizontal position of the boot by fitting into the small diameter portion;
A moving member that moves vertically and horizontally with respect to the boot platform;
An elevating member provided on the moving member so as to be movable up and down;
A plurality of band gripping pieces which are swingably provided on the elevating member and are inserted inside the small-diameter band;
A band gripping piece swinging mechanism that swings these band gripping pieces and presses the inner surface of the small-diameter band;
A plurality of boot gripping pieces which are swingably provided on the elevating member and are inserted into the inside of the small diameter portion and the boundary portion between the small diameter portion and the conical portion;
A boot gripping piece swinging mechanism for swinging these boot gripping pieces and pressing the inner peripheral surface of the small diameter portion;
A band push-down member provided on the moving member to push down the band;
The boot positioning member performs horizontal positioning of the boot, and the boot gripping piece supports the boundary portion with the small diameter portion supporting member while suppressing the inner peripheral surface of the small diameter portion. In this state, the small diameter band is the small diameter portion. A small-diameter band temporary attachment device comprising: a control unit that controls to lower the band push-down member until it is fitted into the band.

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