JPH0942229A - Band type fastening member - Google Patents

Abstract

(57) Abstract: A band-type fastening member which is attached to the outer periphery of a fastened part and fastens the fastened part, in which a band body having free ends at both ends is curved in a ring shape, and a pair is provided at both ends. There is a problem that it is necessary to use both hands when engaging the engaging portion of, and workability is poor. SOLUTION: A band main body 10 which is band-shaped and is curved in a ring shape with both ends being free ends, and a band which is band-shaped and curved in a substantially arc shape and has one end fixed at a position separated from one end of the band main body 10 by a predetermined distance. The plate 20 is provided, and the overlapping portion 14 that overlaps with the outer peripheral surface of the band plate 20 is provided at one end of the band body 10. The overlapping portion 14 is brought into contact with the band plate 20 with a predetermined elastic force. An engaging portion 17 is provided at the other end of the main body 10 and an engaging hole 12 that engages with the engaging portion is provided at the overlapping portion. When the engaging portion 17 and the engaging hole 12 are engaged, the band body 10 The other end of the strip is sandwiched between the inner periphery of the overlapping portion 14 and the outer periphery of the strip plate 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band type fastening member which is attached to the outer periphery of a fastened portion and fastens the fastened portion.

[0002]

2. Description of the Related Art Conventionally, as a band type fastening member which is inserted into the outer periphery of a fastened portion and fastens the fastened portion, for example, there is one disclosed in Japanese Patent Publication No. 1-22481. This one is
As shown in FIG. 12, one metal plate is processed into a band shape, and includes a band main body 1 curved in a substantially ring shape, and an auxiliary band plate 2.

An engaging convex portion 3 is formed at one end of the band body 1, and an engaging hole 4 for engaging the engaging convex portion 3 is formed at the other end of the band main body 1. These engaging convex portions are formed. The band body 1 is formed in an endless shape by the engagement of the engagement holes 3 with the engagement holes 4. Further, the band body 1 is provided with a caulking portion 5, and by caulking the caulking portion 5 with a caulking tool (not shown), a tightening force is applied to a portion to be fastened (not shown). Has become.

The auxiliary strip 2 is inserted into the inner periphery of the band body 1 corresponding to the caulking portion 5 when the caulking portion 5 is caulked, so that the portion to be fastened is engaged with the inner periphery of the caulking portion 5. To prevent.

[0005]

Conventionally, in order to engage the engaging protrusion 3 of the band body 1 with the engaging hole 4, the engaging hole 4 is fitted over the engaging protrusion 3. Therefore, it is necessary to use both hands, and there is a problem that workability is poor. In addition, the engaging protrusion 4 has an engaging hole 4
If you just put in, the force to maintain that state does not work, so there is a danger that it will come off when you release your hand.

Therefore, even when the caulking portion 5 is caulked, it is necessary to support the engaged state of the engaging convex portion 3 and the engaging hole 4, both hands must be used, and the workability is poor. was there.

[0007]

The band type fastening member of the present invention has been made to solve the above-mentioned problems.
In the invention according to claim 1, a band main body curved in a ring shape with both ends being free ends, and a band main body curved in a substantially arc shape and having one end at a position separated from the one end of the band main body by a predetermined distance. A band plate to be fixed is provided, and an overlapping portion that overlaps the outer peripheral surface of the band plate is provided at one end of the band main body, and the overlapping portion is brought into contact with the band plate with a predetermined elastic force, An engaging portion is provided at the other end of the band body, an engaging hole that engages with the engaging portion is provided in the overlapping portion, and the band is in a state in which the engaging portion and the engaging hole are engaged with each other. The other end of the main body is sandwiched between the inner circumference of the overlapping portion and the outer circumference of the strip plate.

According to this, when tightening is started, the other end of the band body is moved while sliding on the outer peripheral surface of the band plate.
Further, when tightened, the engaging portion pushes up the overlapping portion so that the other end of the band body is inserted between the overlapping portion and the strip plate. Further, when tightened, the engaging hole is fitted into the engaging portion, so that the overlapping portion is pushed down by the spring back, and the other end of the band body is sandwiched between the overlapping portion and the band plate.

According to a second aspect of the present invention, in the band type fastening member according to the first aspect, the movement of the other end of the band body is guided and held in the vicinity of the start of engagement between the engaging portion and the overlapping portion. The guide part is provided on the strip plate. According to this, even if the elastic force of the overlapping portion acts on the other end of the band main body due to the engagement between the overlapping portion and the other end of the band main body, the other end of the band main body is guided by the guide portion and stably. Moved surely.

According to a third aspect of the present invention, in the band type fastening member according to the first or second aspect, the band main body is provided with a tolerance absorbing portion curved outward with a predetermined elastic force. It is characterized by that. According to this, in the state where the engagement between the engaging portion and the engaging hole is completed, the elastic force in the tolerance absorbing portion acts as the tightening force on the fastened member, so that the fastened member is fastened. Therefore, it is not necessary to separately perform the tightening process.

According to a fourth aspect of the present invention, in the band type fastening member according to the third aspect, the protection is located at a position corresponding to the tolerance absorbing portion in a state where the fastening is completed, and protects the tolerance absorbing portion. A cover is provided on the strip plate. According to this, since the protective cover is positioned at the position that protects the tolerance absorbing portion in the state where the fastening of the member to be fastened is completed, it is possible to protect the tolerance absorbing portion from the factors that deform it. Further, in the state before tightening, the shape of the band main body is stabilized, and the guide portion guides the other end of the band main body, so that the workability is further improved.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. The band type fastening member of the present embodiment is for attaching the tubular boot B to the gear housing in a rack and pinion type power steering device, for example. This fastening member is
As shown in FIGS. 1 and 2, a band body 10 having both ends free from each other, and a band-shaped and substantially arc-shaped attachment provided at one end of the attachment engagement portion 16 of the band body 10. It is composed of a strip 20 fixed at a portion 21.

As shown in FIGS. 5 and 6, the band body 10 is formed into a band shape by processing a single metal plate and is curved in a substantially ring shape. This band body 10
An engaging bent portion 11 that is bent outward at a predetermined angle to engage with the other end of the band body 10 at the time of tightening the band.
Are formed. A rectangular engaging hole 12 extending in the circumferential direction and penetrating the front and back of the band body 10 is formed at a position separated from the engaging bent portion 11 by a predetermined distance, and the rectangular engaging hole 12 is formed at a position further separated from the engaging hole 12 by a predetermined distance. A bending portion 13 that bends toward one side is formed.

Here, the engaging hole 12 and the engaging bent portion 11
The part where the and are formed overlaps with the strip 20
4, the inner peripheral surface of the overlapping portion 14 is an outer peripheral surface of the strip plate 20 with a predetermined elastic force by the bending portion 13 in a state where the strip plate 20 is fixed to the band body 10. It is supposed to be pressed against. Further, a step portion 15a that bends inward is formed at a position separated from the bending portion 13 by a predetermined distance, and a concave portion is formed between the step portion 15a and the bending portion 13 from both sides. The mounting engagement portion 16 is formed.

Due to the formation of the step portion 15a, when the band plate 20 is fixed to the band body 10, the inner circumference of the band body 10 and the inner circumference of the band plate 20 are smoothly continuous. It becomes a face. On the other hand, an engaging portion 17 that engages with the engaging hole 12 is formed at a position separated from the other end of the band body 10 by a predetermined distance.

When a band type fastening member is fastened with a fastening tool T such as pliers or pliers at a position separated from the engagement portion 17 by a predetermined distance, a locking portion 18 for locking one end of the fastening tool T. Are formed. (FIGS. 9 to 1
1) Further, at a position separated from the locking portion 18 by a predetermined distance,
The tolerance absorbing portion 19 is formed so as to curve outward in a C shape. By the tolerance absorbing portion 19, the tightening force (elastic force) of the band-type tightening member against the outer circumference of the boot B is obtained.
Is provided, and the expansion and contraction of the boot B can be dealt with.

The engaging portion 17 is engaged with the engaging bent portion 11 of the overlapping portion 14 and engages with the engaging bending portion 11 to push the overlapping portion 14 outwardly to move forward, and the tightening of the band is completed. In this state, when the band type fastening member is expanded by the action of the tolerance absorbing portion 19, the engaging projection portion 17b that is caught in the engaging hole 12 is formed. Here, the engaging portion 17 and the locking portion 18 have substantially the same shape,
Each of them is formed on the band body 10 in alternate directions.

The engaging portion 17 and the engaging portion 18
After being processed from the left and right directions into the shape shown by the dotted line in FIG. 6, each is bent at a right angle to the outer peripheral surface of the band main body 10 so that the band main body 10 is almost centered in the width direction. It is provided so as to extend in the outer peripheral direction. In this way, since the engaging portion 17 and the locking portion 18 are respectively bent from the left and right opposite directions, the bending load applied to the band body 10 at the time of bending becomes substantially equal to the left and right, and the band body 1 due to bending is bent.
Can be suppressed to be small.

A step portion 15b is formed at a position further separated from the tolerance absorbing portion 19 by a predetermined distance, and the strip plate 20 is provided in a gap formed between the step portion 15b and the outer peripheral surface of the boot B. The other end is inserted. As shown in FIGS. 7 and 8, the mounting engagement portion 1 provided on the band body 10 is provided at one end of the band plate 20.
The mounting portion 21 fixed to the 6 is provided. In the state before being attached to the band body 10, the attaching portion 21 has a shape protruding laterally as shown by the dotted line in FIG. 8, and in this state, the attaching portion 21 has the same width as the band plate 20. While being bent, both attachment parts 21 are bent at a right angle to the outer peripheral surface of the band plate 20 near the center of the band plate 20 and caulked and polymerized, so that the band main body 10 is fixed to the band body 10 as shown in FIG. Is fixed.

Here, the overlapped mounting portion 21 constitutes the other locking portion 22 which makes a pair with the locking portion 18 provided on the band body 10. When the other end of the band body 10 is engaged with the overlapping portion 14 at the time of tightening the fastening member, the band body 10 is separated from the locking portion 22 by a predetermined distance due to the elastic force of the overlapping portion 14. A pair of guide portions 23 for guiding and holding the other end of the band body 10 is formed so that the other end of the band body 10 does not deviate from the outer peripheral surface of the band plate 20.

The guide portion 23 is provided on the outer peripheral surface of the strip plate 20 at a position corresponding to the width of the strip plate 20 from a state where the guide portion 23 projects from both sides of the strip plate 20 as shown by the dotted line in FIG. On the other hand, it is bent at a right angle. At a position further separated from the guide portion 23 by a predetermined distance, it is positioned so as to sandwich the entire tolerance absorbing portion 19 from the side in a state where the band tightening is completed, and the tolerance absorbing portion 19 is caused by an external deformation factor such as a flying stone. A pair of protective covers 24 that protect the tolerance absorbing portion 19 are provided so as to prevent an adverse effect such as a decrease in elasticity and a decrease in elastic force.

Similar to the guide portion 23, the protective cover 24 is indicated by a solid line at a position corresponding to the width of the strip 20 from a state where it is projected laterally of the strip 20 as shown by a dotted line in FIG. Is bent at a right angle to the outer peripheral surface of the strip plate 20. As shown in FIGS. 3 and 4, the protective cover 24 holds the other end of the band body 10 on the band plate 20 in a state before tightening the band. Thereby, the other end of the band body 10 can be smoothly and surely moved to the guide portion 23.

Next, the tightening operation of the band-type fastening member showing the embodiment of the present invention having the above-mentioned structure will be described.
In the state before tightening the band, as shown in FIG. 3, the other end of the band body 10 is in contact with the outer peripheral surface of the band plate 20, and the pair of protective covers 24 makes a direction perpendicular to the paper surface (the band). The band type fastening member is supported in the width direction of the main body 10 and has a substantially ring shape having a diameter larger than the outer diameter of the boot B that is the fastening target member. Here, the inner diameter of the band type fastening member in the state where the band tightening is completed without inserting the boot B is set to be smaller than the outer diameter of the boot B.

In this state, a fastening member is inserted around the boot B. Next, with the tightening tool T, the pair of locking portions 1
8 and 22 are gripped, and tightening is started in a direction in which the pair of locking portions 18 and 22 approach each other. Then, by gradually tightening, the other end of the band body 10 slides on the outer peripheral surface of the band plate 20 while being guided laterally by the pair of protective covers 24, as shown in FIG. It is moved in 11 directions.

Further, when tightened, the band body 10
The other end of is moved to a position where it is laterally guided by the guide portion 11. Then, while being guided by the guide portion 11 laterally, the engagement taper portion 17a of the engagement portion 17 engages with the inner circumference of the engagement bent portion 11, and due to both taper actions, as shown in FIG. The engaging bent portion 11 (overlapping portion 14) is pushed outward against the elastic action of the bending portion 13.

Here, the other end of the strip 20 moves while slidingly contacting the outer circumference of the boot B, and gradually cuts off between the inner circumference of the tolerance absorbing portion 19 and the outer circumference of the boot B. by this,
The outer circumference of the boot B is prevented from entering the inner circumference of the tolerance absorbing portion 19 due to deformation. Further, when tightened, as shown in FIG. 11, the elastic return force of the bending portion 13 causes the engaging portion 17 to fit into the engaging hole 12. This is because the elastic force (springback) of the bending portion 13 acts. As a result, the other end of the band body 10 is elastically sandwiched between the inner peripheral surface of the overlapping portion 14 and the outer peripheral surface of the band plate 20.

On the other hand, the tightening force acts on the outer peripheral surface of the boot B by expanding the tolerance absorbing portion 19 curved in a C shape. Here, even if the boot B has a variation in tolerance, the tolerance is absorbed by the tolerance absorbing portion 19. Also,
The tolerance absorbing portion 19 can follow the expansion and contraction of the boot B, that is, the change with time of the boot diameter after insertion.

When the tightening by the tightening tool T is released in this state, the tightening member is expanded by the reaction acting on the outer circumference of the boot B against the tightening force by the tightening member. As a result, as shown in FIGS. 1 and 2, the engagement protrusion 17b of the engagement portion 17 is caught in the engagement hole 12 and the expansion of the tightening member is locked, and the band tightening is completed.

Upon completion of tightening the band, the protective cover 2
4 is located at a position sandwiching the tolerance absorbing portion 19 from both sides, and protects the tolerance absorbing portion 19 from external deformation factors such as flying stones. Further, since the step portion 15b is formed at a position separated from the tolerance absorbing portion 19 by a predetermined distance, the gap between the outer circumference of the boot B formed by the step portion 15b and the inner circumference of the band body 10 is formed. The band plate 20 is inserted in the inner peripheral surface of the band main body 10 and the inner peripheral surface of the band plate 20 to be a smoothly continuous inner peripheral surface.

As described above, the one-touch clamp by the tightening tool T allows the boot B to be easily and securely held with one hand.
The tightening of can be completed.

[0031]

As described above, in the present invention according to claim 1, since the other end of the band body is slid on the outer peripheral surface of the band plate to perform the tightening, the tightened object is tightened. The influence on the outer periphery of the member can be reduced, the insertability is good, and the tightening workability can be improved. Also, since the other end of the band body is sandwiched by the overlapping portion and the strip plate by the spring back in the overlapping portion, the engaging state between the engaging portion and the engaging hole can be maintained, and the tightened state is stable. In addition, the fastening to the fastened member can be completed easily and reliably with one hand.

Further, in the invention of claim 2, even if the elastic force of the overlapping portion acts on the other end of the band body due to the engagement between the overlapping portion and the other end of the band body, the other end of the band body is guided. Since it is guided by the section and is moved stably and reliably, the tightening work is stabilized. Further, in the invention of claim 3, in the state where the engagement between the engaging portion and the engaging hole is completed, the elastic force in the tolerance absorbing portion acts as a tightening force for the fastened member, so that the fastened member is fastened. It is possible to complete the tightening with respect to, and it is not necessary to separately perform a tightening step such as caulking, so that the workability is improved.

Further, the outer diameter tolerance of the member to be fastened can be absorbed and the expansion and contraction of the member to be fastened can be dealt with. Also,
In the invention of claim 4, since the protective cover is located at the position for protecting the tolerance absorbing portion in the state where the fastening to the member to be fastened is completed, the tolerance absorbing portion can be protected from flying stones, etc. It is possible to prevent the elastic force of the tolerance absorbing portion from changing due to a factor. Further, in the state before tightening, the shape of the band main body is stabilized, and auxiliary guide until the other end of the band main body is guided to the guide portion is performed, so that workability can be further improved.

[Brief description of drawings]

FIG. 1 is a side view of a band type fastening member according to an embodiment of the present invention after fastening.

FIG. 2 is a plan development view of the band type fastening member after fastening according to the embodiment of the present invention.

FIG. 3 is a side view of the band-type fastening member according to the embodiment of the present invention before fastening.

FIG. 4 is a plan development view of the band-type fastening member according to the embodiment of the present invention before fastening.

FIG. 5 is a side view of the band body before fastening.

FIG. 6 is a plan development view of the band body before fastening.

FIG. 7 is a side view of the strip before fastening.

FIG. 8 is a plan development view of the strip before fastening.

FIG. 9 is a fastening operation state of the band fastening member according to the embodiment of the present invention.

FIG. 10 is a fastening operation state of the band fastening member according to the embodiment of the present invention.

FIG. 11 is a fastening operation state of the band fastening member according to the embodiment of the present invention.

FIG. 12 is an overall view of a conventional fastening member before fastening.

[Explanation of symbols]

 B boot (member to be fastened) T tightening tool 10 band body 11 guide part 12 engaging hole 14 overlapping part 17 engaging part 19 tolerance absorbing part 20 band plate 24 protective cover

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kanko Suzuki 3-6-6 Masaki Naka-ku, Nagoya-shi, Aichi Takagi Seisakusho Co., Ltd. (72) Inventor Mikio Niwa 3-6 Masaki, Naka-ku, Nagoya-shi, Aichi No. 6 Takagi Co., Ltd.

Claims (4)

[Claims] 1. A band body which is band-shaped and is curved in a ring shape with both ends being free ends, and a band which is band-shaped and is curved in a substantially arc shape and one end of which is fixed at a position separated from one end of the band body by a predetermined distance. A plate, and at one end of the band body is provided with a polymerized portion that overlaps the outer peripheral surface of the strip plate, so that the polymerized portion abuts the strip plate with a predetermined elastic force,
An engaging portion is provided at the other end of the band body, an engaging hole that engages with the engaging portion is provided in the overlapping portion, and the band is in a state in which the engaging portion and the engaging hole are engaged with each other. A band type fastening member, wherein the other end of the main body is sandwiched between the inner circumference of the overlapping portion and the outer circumference of the strip plate. 2. The band type fastening member according to claim 1, wherein the guide portion for guiding and holding the movement of the other end of the band main body is provided near the start of engagement between the engaging portion and the overlapping portion. A band-type fastening member characterized by being provided in the. 3. The band type fastening member according to claim 1, wherein the band main body is provided with a tolerance absorbing portion curved outward with a predetermined elastic force. Fastening member. 4. The band type fastening member according to claim 3, wherein the band plate is provided with a protective cover which is located at a position corresponding to the tolerance absorbing portion in a state where the fastening is completed and which protects the tolerance absorbing portion. A band type fastening member characterized by the above.