JPH1137367A - Boot band - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the tensile force of a band even when the engagement of a set of hole and hook is disengaged. SOLUTION: In a boot band 10 manufactured by rounding a body 11 of which the both edges 13, 14 are opened, the first hole 30 and the second hole 35 are formed on an external overlapped part 21. The first guide/support hook 50 and the second guide/support hook 55 are mounted on an internal overlapped part 22. The first guide/support hook 50 has the shape engageble with a locking edge part 31 of the first hole 30. The second guide/support hook 55 has the shape engageable with a locking edge part 36 of the second hole 35. The first tool hooking projection part 60 is formed on the external overlapped part 21. The second tool hooking projection part 65 is formed on an intermediate part 23 of the body 11. The first tool hooking projection part 60 is formed between the first hole 30 and the second hole 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot band used for fixing a cylindrical body such as a rubber boot or a rubber hose to a mating member.

[0002]

2. Description of the Related Art Conventionally, there has been known a band in which a band-shaped body having both open ends is rolled into a ring shape and attached to a member to be fastened such as a hose. In this type of band, for example, as described in Japanese Utility Model Application Laid-Open No. 6-43482, a guide and support hook having a function to prevent the band from coming off is provided at one overlapping portion of the band, and the guide is provided at the other overlapping portion. A hole is formed to engage with the supporting hook, and furthermore, a second portion having no locking function at these overlapping portions is provided.
And a hole formed with a hook for engaging the hook.

[0003]

A conventional band, for example, when attached to a rubber boot mounting portion of a vehicle, when a hook and a hole are deformed or broken due to a rock jump from a road surface during traveling of the vehicle, particularly, If the guide and support hook breaks, the remaining hooks and holes cannot withstand the band tension or the hooks come off the holes,
In some cases, the band tension could not be maintained. Therefore, an object of the present invention is to prevent a set of holes from engaging with a hook,
An object of the present invention is to provide a boot band capable of maintaining a band tension.

[0004]

According to the present invention, a first hole and a first guide / support hook having the same shape and function as each other are constructed as described in claim 1. And a second hole and a second guiding and supporting hook, but have a strength capable of holding the band tension and a function of preventing the band from being released even if only one of the hole and the hook is combined.

[0005] In the present invention, as described in claim 2, by providing the first tool hooking convex portion between the first hole and the second hole, the outer overlapping portion and the inner overlapping portion. In a state where the first and second guide and support hooks are overlapped with each other, the distance between the first guide and support hook and the second guide and support hook is increased,
In addition, it is preferable that the first tool hooking convex portion exists between these hooks.

If the first hole and the first guide and support hook hold the band tension preferentially, the first hole and the first guide and support hook can be used. In the event that the function of engagement with the second member is lost, the band tension is maintained by the second hole and the second guide and support hook.

In the case where the second hole and the second guide and support hook are configured to preferentially hold the band tension, the second hole and the second guide and support hook may be used. When the function of engaging the hook is lost, the band tension is maintained by the first hole and the first guide and support hook.

According to a fifth aspect of the present invention, by forming a tapered surface by coining at the locking edge of the hole, the guiding function when the guide and support hook engages with the locking edge is enhanced. Can be.

According to a sixth aspect of the present invention, when the guide projection is fitted into the second hole along the longitudinal direction of the body, the displacement in the width direction between the outer overlapping portion and the inner overlapping portion is restricted. Can be.

[0010] As described in the seventh and eighth aspects, the inclination angle θ1 of the tapered surface formed at the locking edge of the hole.
Is larger than the inclination angle θ2 of the front wall of the guide and support hook, the contact point of the hook with the locking edge can be brought closer to the vicinity of the base of the hook, and the strength of the hook against the band tension can be increased. it can.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The boot band 10 shown in FIG. 1 has a band-shaped metal (for example, stainless steel) body 11. Both ends in the longitudinal direction of the body 11 are a first end 13 and a second end 14 that are open.

As shown in FIG. 3, the body 11 is
4 is wound in a ring shape around the member to be fastened 20 so as to be positioned inside. The ring-shaped body 11 has an outer overlapping portion 21, an inner overlapping portion 22, and these two portions 2.
And a longitudinal intermediate portion 23 (a non-overlapping portion) located between 1 and 22. The body 11 may be formed in a ring shape to some extent in advance.

A first hole 30 is formed at a position near the first end 13 of the outer overlapping portion 21. This hole 30
A locking edge 31 is provided near the first end 13. Further, a second hole 35 is formed in the outer overlapping portion 21 at a position farther from the first end 13 than the first hole 30.
The hole 35 has an elongated shape (a long hole) extending in the longitudinal direction of the body 11 and has a second guide and support hook 55 described later.
And the guide projection 70 can be inserted. The second hole 35 also has a locking edge 36 near the first end 13.

The locking edges 31 and 36 of each of the first hole 30 and the second hole 35 are formed by directly holding the body 11 from above as shown in FIG. It is formed in an arc shape when viewed (in plan view). However, these locking edges 31, 36 may be substantially linear along the plate width direction of the body 11. The locking edges 31, 36 are formed with tapered surfaces 40, 41 whose thickness gradually decreases toward the edges of the holes 30, 35 by coining.

The above-mentioned coining is performed by pressing the locking edges 31, 36 in the thickness direction between a coining die (not shown) and a punch facing the die, thereby forming the surfaces of the tapered surfaces 40, 41. This is a process for smoothing and forming a desired tapered shape. Note that the first hole 30 and the second
One of the holes 35 may be subjected to the coining.

A first guide and support hook 50 (also referred to herein as a first hook) is provided in the inner overlap portion 22. The first hook 50 is formed by press working so as to bulge out of the inner overlapping portion 22, and has a size that can be inserted into the first hole 30. The first hook 50 includes a front wall 51 that can be engaged with the locking edge 31 of the first hole 30, and a bulged portion 52 having an arch-shaped cross section that is connected to the rear side of the front wall 51. ing. The front wall 51 rises in an overhanging shape so as to protrude in the direction of the first end 13. The height of the hook 50 is larger than the thickness of the body 11.

Therefore, when tightening the band 10 using the tool 85 described later, when the front wall 51 is hooked on the locking edge 31 of the first hole 30 and the tightening by the tool 85 is loosened. When the band 10 elastically returns in the spreading direction, the locking edge 31 slides on the front wall 51 and draws the locking edge 31 to the vicinity of the base of the hook 50. That is, the front wall 51 of the first hook 50 exhibits a guiding function of drawing the outer overlapping portion 21 to the inner overlapping portion 22 and a function of preventing the first hole 30 from coming off. Moreover, the hook 50 has a strength enough to withstand the band tension by itself.

A second guide and support hook 55 (also referred to herein as a second hook) is provided in the inner overlap portion 22. The second hook 55 is provided at a position farther from the first end 13 than the first hook 50 (a position closer to the second end 14). The second hook 55 and the first hook 50 have substantially the same shape as each other.

That is, the second hook 55 is also formed by press working so as to bulge out of the inner overlapping portion 22, and has a size that can be inserted into the second hole 35. The second hook 55 has a front wall 56 engageable with the locking edge 36 of the second hole 35 and a front wall 56.
And a bulged portion 57 having an arch-shaped cross-section connected to the rear side of the rear surface. The front wall 56 rises in an overhanging shape so as to protrude in the direction of the first end 13. The height of the hook 55 is larger than the thickness of the body 11.

Therefore, similarly to the first hook 50, when the band 10 is tightened by the tool 85, the second hook 55 also hooks the front wall 56 on the locking edge 36 of the second hole 35. Then, when the tightening by the tool 85 is loosened and the band 10 tries to return elastically in the direction in which the band 10 spreads, the locking edge 36 slides on the front wall 56 and the locking edge 36 is moved to the vicinity of the base of the hook 55. You will be attracted to. That is, the front wall 56 of the second hook 55 also exerts a guiding function of drawing the outer overlapping portion 21 to the inner overlapping portion 22 and a function of preventing the second hole 35 from coming off. Moreover, one hook 55 has sufficient strength to withstand the band tension.

The above-described first hole 30 and first hook 50
4 and the combination of the second hole 35 and the second hook 55, as shown representatively of the one hole 30 and the hook 50 in FIG. Is assumed to be larger than the inclination angle θ2 with respect to the vertical line segment M of the front wall 51 of the hook 50. The same applies to the angular relationship between the second hole 35 and the second hook 55.

A first tool hooking projection 60 is provided on the outer overlapping portion 21. The tool hook 60 is located near the first end 13. The first tool hooking convex portion 60 has a first rising wall 61 facing the direction of the second hole 35. This tool hooking projection 60 is the first
Since the outer overlapping portion 21 and the inner overlapping portion 22 are overlapped with each other and the hooks 50 and 55 are engaged with the holes 30 and 35, respectively, The tool hook projection 60 is the first guide and support hook 50.
And the second guide and support hook 55.

A second portion 23 in the longitudinal direction of the body 11 is
Are provided. The tool hooking projection 65 includes a second rising wall 66 that forms a pair with the rising wall 61 of the first tool hooking projection 60. These tool hooking protrusions 60 and 65 are formed so as to protrude to the outer surface side of the body 11 by press working or the like.

A guide projection 70 is provided between the second hook 55 and the second end 14. Guide projection 70
Is cut and raised by pressing a part of the body 11 outward. The guide projection 70 is inserted into the second hole 35 extending in the longitudinal direction of the body 11, and can move in the longitudinal direction of the body 11 in the second hole 35. However, the movement in the width direction is restricted. , Body 1
The outer overlapping portion 21 is suppressed from being displaced in the width direction with respect to the inner overlapping portion 22 when tightening 1.

In this embodiment, as shown in FIG.
Locking edge 31 of hole 30 and front wall 5 of first hook 50
In the engagement state where the first hooks 1 are in contact with each other, the front wall 56 of the second hook 55 and the locking edge 36 of the second hole 35 are separated from each other and are not engaged. That is, the first hole 30 and the first hook 50 share the function of holding the band tension preferentially, and the second hole 35 and the second hook 55 share the function of holding the band tension auxiliary. I am trying to do it.

Next, the operation of the boot band 10 will be described. As shown in FIG. 3, a boot band 10 according to this embodiment includes a boot 80 as an example of the member 20 to be fastened.
It is used to fix the connection between the pipe and the pipe 81. The boots 80 are made of rubber, for example, and the pipe 81 is made of metal. However, the boot 80 or the pipe 81 may be made of a synthetic resin.

As shown in FIG. 3, the boot band 10
Is wound outside the fitting portion between the boot 80 and the pipe 81. Thereafter, as shown in FIG. 5, the pair of tips 86 and 87 of the tool 85 are engaged with the tool hooking projections 60 and 65, and the tool 85 pulls the tool hooking projections 60 and 65 in a direction to approach each other. . At this time, the guide projection 70 enters the second hole 35.

When the body 11 is tightened by a predetermined amount with the tool 85, as shown in FIG.
Since 1 is located on the front side of the front wall 51 of the first guide and support hook 50, the locking edge 31 can be engaged with the hook 50. In this state, when the tightening by the tool 85 is loosened, the tapered surface 40 of the locking edge 31 of the hole 30
The guide is guided toward the root of the hook 50 while sliding on the front wall 51 of the hook. As a result, the outer overlapping portion 21 is drawn toward the inner overlapping portion 22, and finally, as shown in FIG. 7, the two overlap, and the hook 50 is prevented from coming off with respect to the locking edge 31.

If the above-mentioned tapered surface is not provided at the locking edge 31 of the hole 30 as shown in FIG. 8, the locking edge 31 is stopped while being hooked on the tip end surface of the hook 50. In some cases, the locking edge 31 cannot move to the vicinity of the base of the hook 50, and a sufficient engagement state cannot be realized.

As in the embodiment shown in FIG. 9, the front wall 51 of the first hook 50 and the locking edge 31 of the first hole 30 abut each other, and the front wall 56 of the second hook 55 When the locking edge 36 of the second hole 35 is separated, the locking edge 31 of the first hole 30 and the first hook 5
Even when the engagement with the second hook 35 is released, the locking edge 36 of the second hole 35 and the second hook 55 are engaged, and the band tension is maintained by the second hook 55.

FIG. 10 shows a second embodiment of the present invention.
In this embodiment, when the locking edge 36 of the second hole 35 and the front wall 56 of the second hook 55 are in contact with each other, the locking edge 31 of the first hole 30 and the first The front wall 51 of the hook 50 is slightly separated. That is, the second hole 35
The locking edge 36 of the first hole 30 and the second hook 55 share the function of maintaining the band tension preferentially.
The first and first hooks 50 share the function of holding the band tension in an auxiliary manner. In this case, the locking edge 36 of the second hole 35 and the second hook 55
Is released, the locking edge 31 of the first hole 30 and the first hook 50 are engaged, and the band tension is maintained by the first hook 50.

In the third embodiment shown in FIG. 11, the locking edge 31 of the first hole 30 and the front wall 51 of the first hook 50 are provided.
Are in contact with each other, and the locking edge 36 of the second hole 35
And the front wall 56 of the second hook 55 also abuts.

The band 10 of each of the above embodiments has a hole 30,
Although the tapered surfaces 40 and 41 are formed by coining on the locking edges 31 and 36 of the 35, the present invention is different from the embodiments shown in FIGS.
The desired purpose can be achieved without coining.

In the embodiment shown in FIG.
The locking edge 31 of the first hook 50 and the front wall 51 of the first hook 50 are in contact, and the locking edge 36 of the second hole 35 and the front wall 56 of the second hook 55 are not in contact.

In the embodiment shown in FIG.
The engaging edge 36 of the first hook 50 and the front wall 56 of the second hook 55 are in contact, and the front wall 51 of the first hook 50 is not in contact with the engaging edge 31 of the first hole 30.

In the embodiment shown in FIG.
The locking edge 31 of the first hook 50 and the front wall 51 of the first hook 50 abut, and the locking edge 36 of the second hole 35 and the front wall 56 of the second hook 55 also abut.

In carrying out the present invention, the holes 30 and 35 and the guide / support hook 5 constituting the present invention are used.
Needless to say, each component such as 0, 55 and the shape of the tool hooking convex portions 60, 65 can be appropriately modified and implemented. Further, three or more combinations of holes and guide / support hooks may be provided.

[0038]

According to the first aspect of the present invention, even if one of the hooks and the hole cannot be engaged due to, for example, a rock jump from the road surface while the vehicle is running, the band tension is controlled by the other hook and the hole. Can be held.

As described in claim 2, by providing the first tool hooking convex portion between the first hole and the second hole, the first hook and the second hook can be connected to each other. If the configuration is such that the distance between the first hook and the second hook can be increased and the first tool hooking convex portion can be arranged between the first hook and the second hook, the first hook and the second hook can be separated by a stone jump or the like. The possibility of being destroyed at the same time can be avoided.

As described in claim 3, the first hole and the first hole
When the first hole and the first hook cannot be engaged with each other, the second hole and the second hook are engaged with each other, so that the band tension can be increased. Is held. In the case of the configuration in which the second hole and the second hook are preferentially engaged as described in claim 4, when the second hole and the second hook cannot be engaged, the first hole is engaged. Engagement of the hole with the first hook maintains the band tension.

According to the fifth aspect of the present invention, when a tapered surface is formed by coining at the locking edge portion of the hole, the locking edge of the hole is formed by the tapered surface during the step of tightening the body with a tool. The part and the hook are guided in a direction in which they are securely engaged with each other. If such a tapered surface is provided, when the engagement between one hole and the hook is released and the transition to the engagement between the other hole and the hook is made, the engagement between the hole and the hook is made by the tapered surface. The joint is guided and both are securely engaged. The surface of the tapered surface is smoothed to a desirable state by coining, and the strength near the locking edge is increased by densification of the structure due to forging and work hardening.

According to the sixth aspect of the present invention, if the guide projection is inserted into the second hole, the body can be suppressed from being displaced in the width direction in the step of tightening the body.
In addition, since the second hole also serves as a guide hole, the number of holes can be reduced, which is advantageous in terms of the strength of the body, and the labor and equipment required for drilling holes can be reduced.

According to the seventh and eighth aspects of the invention, in addition to the effect of the first aspect, the locking edge of the hole and the hook are securely engaged in the vicinity of the base of the hook. In addition, the bending moment of the hook due to the band tension is reduced, and the strength of the hook is further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a boot band according to an embodiment of the present invention.

FIG. 2 is a perspective view of a part of the boot band shown in FIG. 1;

FIG. 3 is a sectional view showing a state in which the boot band shown in FIG. 1 is attached to a fastening partner.

FIG. 4 is a sectional view showing holes and hooks of the boot band shown in FIG. 1;

FIG. 5 is a cross-sectional view of a part of the boot band showing a state before the boot band is tightened by a tool.

FIG. 6 is a cross-sectional view of a part of the boot band showing a state in which the boot band is tightened by a tool.

FIG. 7 is a cross-sectional view of a part of the boot band showing a state where a hook is engaged with a locking edge of a hole of the boot band.

FIG. 8 is a cross-sectional view of a part of the boot band showing the engagement state of the hooks with the locking edges of the holes of the boot band that have not been coined;

FIG. 9 is an enlarged sectional view showing a part of one embodiment of a boot band subjected to coining.

FIG. 10 is a cross-sectional view showing a modified example of a coined boot band.

FIG. 11 is a cross-sectional view showing still another modified example of a coined boot band.

FIG. 12 is a sectional view showing an embodiment of a boot band that has not been coined.

FIG. 13 is a sectional view showing a modification of the embodiment of the boot band that has not been coined.

FIG. 14 is a cross-sectional view showing still another modification of the embodiment of the boot band that has not been coined.

[Description of Signs] 10 ... Boot band 11 ... Body 13 ... First end 14 ... Second end 21 ... Outside overlapping portion 22 ... Inner overlapping portion 30 ... First hole 31 ... Locking edge 35 ... Second hole 36 ... locking edge 50 ... first guide and support hook 51 ... front wall 55 ... second guide and support hook 56 ... front wall 60 ... first tool hook projection 65 ... second tool hook Convex part 70: Convex part for guide

Claims (8)

[Claims] 1. A boot band used in a state where a metal band-shaped body whose both ends are opened is rounded in a ring shape and overlapped so that a first end is located outside and a second end is located inside, A first hole formed in the outer overlapping portion of the body and having a locking edge near the first end; and a first hole formed in the outer overlapping portion at a position farther from the first end than the first hole. A second hole having a locking edge near the first end; and an overhanging front wall projecting outward from an inner overlapping portion of the body and projecting toward the first end. And has a function of guiding the outer overlapping portion in a direction of drawing toward the inner overlapping portion when the band moves in the spreading direction in a state in contact with the locking edge of the first hole. Stopper for the toe A first guide and support hook having strength to withstand a band tension; and a first guide and support hook protruding outward from a position distant from the first guide and support hook at an inner overlapping portion of the body, and It has an overhanging front wall protruding in the direction of one end and pulls the outer overlapping portion toward the inner overlapping portion when the band moves in the spreading direction in contact with the locking edge of the second hole. A second guide and support hook having a function of guiding in the direction and having a function to prevent the second hole from coming off the locking edge and having a strength to withstand a band tension; provided at an outer overlapping portion of the body. A first tool hooking projection protruding outward, and a second tool hooking projection provided at an intermediate portion in the longitudinal direction of the body and projecting outward. Boots band. 2. The boot band according to claim 1, wherein said first tool hook projection is located between said first hole and said second hole. 3. The locking edge of the second hole and the second guide when the locking edge of the first hole and the front wall of the first guide and support hook are in contact with each other. 2. The boot band according to claim 1, wherein each of the hooks is provided such that the hook does not contact the front wall of the supporting hook. 4. The locking edge of the first hole and the first guide when the locking edge of the second hole and the front wall of the second guide and support hook are in contact with each other. 2. The boot band according to claim 1, wherein each of the hooks is provided such that the hook does not contact the front wall of the supporting hook. 5. A tapered surface whose thickness gradually decreases toward the edge of the hole by coining at least one of the locking edges of the first hole or the second hole. The boot band according to claim 1. 6. The second hole is an elongated hole extending in the longitudinal direction of the body, and an outward guide projection provided on an inner overlapping portion of the body is formed in the second hole. The boot band according to claim 1, wherein the boot band is inserted so as to be movable in a direction. 7. The inclination angle .theta.1 with respect to the vertical line segment of the tapered surface of the locking edge of the first hole with respect to the vertical line segment of the front wall of the first guide and support hook.
6. The boot band according to claim 5, wherein the width is larger than 2. 8. The inclination angle .theta.1 with respect to the vertical line segment of the tapered surface of the locking edge of the second hole with respect to the vertical line segment of the front wall of the second guide and support hook.
6. The boot band according to claim 5, wherein the width is larger than 2.