JPH0516480Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a boot band for tightening rubber hoses and the like.

(Prior Art) Conventionally, a boot band 1 as shown in FIG. 7 has been used to attach a rubber hose to a radiator pipe or the like in the engine room of an automobile (see Japanese Utility Model Application Publication No. 146087/1987). ).

This boot band 1 is made by rolling a metal band member 2 into a ring shape so that both ends overlap each other. A locking hole 3 is provided in the outer overlapping portion of the band-shaped member 2, and a protrusion 4 that engages with the locking hole 3 is provided in the inner overlapping portion. Further, a portion closer to the center than the portion where the locking hole 3 is provided has an ear portion 5 for tightening that is bent outward and bulged.

The boot band 1 is fitted onto the outer periphery of the rubber hose 7 that is inserted into the pipe 6, and the protrusion 4 is locked into the locking hole 3 to close the ring. By caulking the ears 5 in the direction shown by the arrow in FIG. 8, the diameter of the boot band 1 is reduced and the hose 7 is tightened.

(Problem to be solved by the invention) However, since the tightened state of the boot band 1 is maintained simply by caulking the ears 5, the hose 7 in the tightened state tends to expand in diameter. Due to the reaction force, the caulking of the ear portion 5 becomes loose as shown in FIG. 9, and the tightening force of the boot band 1 decreases, causing the problem that the hose 7 becomes easily pulled out from the pipe 6. In addition, in order to solve this problem, conventional techniques have been used, for example, to flatten the caulked ear portion 5 or to form the band member 2 into a channel shape having a U-shaped cross section at the portion of the ear portion 5. Although efforts have been made to make it difficult for the caulking of the ear portion 5 to loosen, there is no change in the fact that the tightened state of the boot band 1 is maintained only by caulking the ear portion 5. It was not possible to effectively prevent the attached ears 5 from loosening.

Therefore, the present invention aims to solve the above problems.

(Means for Solving the Problem) A means for solving the above problem is to form a band-shaped member into an annular shape, set an overlap margin at both ends, and provide a fastening hole at both ends. The boot band is provided with a protrusion that can be engaged with the boot band, and has a tightening ear formed on the end that overlaps with the outside, and the end that overlaps with the outside has the aforementioned fastening hole or protrusion. , provided at a first locking position on the distal side of the ear, and a second locking position on the center side of the ear, separated by a predetermined distance A from this position, and at the end overlapping on the inside, the The protrusions or fastening holes are separated by a predetermined first interval that is smaller than the above-mentioned interval A by the tightening margin of the ears.
It is provided at the locking position and the second locking position.

In the above means, the band is usually made of metal, but bands made of other types of materials may also be used.

The fastening holes and protrusions provided at both ends of the boot band are such that when they are locked together at the first locking position, the boot band becomes a ring body having the diameter before tightening, and when the holes and protrusions provided at the second locking position The boot band is provided at a position where the boot band becomes a ring body having the diameter when tightened when the items are locked together.

The fastening holes or protrusions provided at the first locking position and the second locking position at both ends may be provided in a single or plural number.

(Function) While the retaining holes provided at the first retaining positions on both ends are engaged with the protrusions, the ears of the boot band that are loosely fitted around the outer periphery of the hose that is inserted into the pipe are held in place using a tool, etc. When it is caulked and tightened, it reaches a position where the retaining holes provided at the second retaining positions at both ends and the protrusions overlap. Then, when this fastening hole and the protrusion are locked,
No reduction in the tightening force of the boot band occurs.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 6.

As shown in FIG. 1, the boot band 8 is formed by forming a metal band member 9 into an annular shape with both ends overlapping to some extent in the free state.

A tightening ear portion 11 is formed at a suitable portion of the end portion 10 that overlaps the outside.
As shown in FIG. 2, the ear portion 11 is formed by bending the band member 9 into a U-shape to bulge out.

A portion of the end portion 10 on the distal side of the ear portion 11 is a first locking position, and two fastening holes 1 are provided at this position.
2 are provided side by side in the longitudinal direction at predetermined intervals.

A portion of the end portion 10 closer to the center than the ear portion 11 is a second locking position, and two fastening holes 13 are also provided in this position in line at a predetermined interval in the longitudinal direction.

The intermediate position between the two fastening holes 12 and the intermediate position between the two fastening holes 13 are set to be separated by a predetermined distance A (see FIG. 2).

On the other hand, in the end portion 14 that overlaps on the inside, a predetermined portion slightly closer to the center side is a first locking position, and two claws having an L-shaped cross section that can be locked in the fastening hole 12 are provided at this position. The shaped protrusions 15 are arranged in the longitudinal direction at the same intervals as the intervals between the fastening holes 12.

A predetermined portion on the tip side of the end portion 14 is a second locking position, and at this position also, two claw-shaped protrusions 16 that can lock into the fastening holes 13 are provided at the same spacing as the spacing between the fastening holes 13. They are lined up in the longitudinal direction and squeezed.

The intermediate position between the two protrusions 15 and the two protrusions 16
The intermediate position is a distance C that is smaller than the distance A by a tightening margin B of the ear portion 11 (see FIG. 2).

Also, fastening holes 12 at the first locking positions at both ends.
When the boot band 8 is locked with the protrusion 15, the boot band 8 becomes a ring body with a diameter that is not large enough to tighten the hose 17 (see Fig. 3), and the boot band 8 becomes a ring body with a diameter that is not large enough to tighten the hose 17, which will be described later. 16, the boot band 8 becomes a ring body having a diameter that effectively tightens the hose 7 (see Fig. 5).
As shown in FIG.
A locking position is set.

This embodiment is constructed as described above and is used as follows.

That is, the boot band 8 in a free state is first loosely fitted onto the outer periphery of a hose 17 made of rubber or the like, and the hose 17 is inserted and connected to a pipe 18 such as an automobile radiator pipe.

Next, the boot band 8 is positioned at a predetermined attachment site, and the fastening holes 12 at the first locking positions at both ends of the boot band 8 are positioned.
By locking the boot band 8 and the protrusion 15 as shown in FIG. 3, the boot band 8 is made into a closed ring shape.

Next, as shown in Figure 4, tools 19 such as Yatsutoko etc.
Using a screwdriver, caulk the rising portions of both ends of the ear portion 11 in the direction of the arrow in the figure until they almost touch each other.
As a result, the diameter of the boot band 8 is reduced by the width of the tightening margin B, so that the hose 17 is tightened and cannot be removed from the pipe 18. Moreover, at this time,
Fastening holes 1 at the second locking positions at both ends of the boot band 1
3 and the protrusion 16 overlap, and the protrusion 16
automatically fits into the fastening hole 13 and is locked. Even if it is difficult to lock automatically, it can be easily locked by applying a slight external force. In this way, the protrusion 16 is connected to the fastening hole 1.
3, the boot band 8 no longer expands in diameter due to its fastening action, so the boot band 8 will not loosen due to the reaction force of the tightened hose 17 trying to expand its diameter, and the tightening force will be reduced. Does not decrease.

Note that the ears 11 after crimping should be flattened so as not to get in the way (Fig. 5,
(See Figure 6).

As another embodiment of the present invention, a protrusion protruding inward is provided at both or one of the first locking position and the second locking position of the end overlapping the outside,
A fastening hole may be provided at the first locking position and the second locking position of the end portion that overlaps on the inside so as to correspond to the above-mentioned protrusion.

(Effects of the Invention) The present invention can reliably prevent a decrease in the tightening force of the boot band due to loosening of the caulked ears in a boot band in which a hose is tightened by caulking the tightening ears. Therefore, there is no need to worry about the tightened hose easily coming off the pipe.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a sectional view of the essential parts showing both ends of the boot band in a linear shape for convenience of explanation, and Figs. 3 to 6 are the boot band. Fig. 3 shows a state in which the fastening hole and the protrusion at the first locking position are locked;
Figure 4 shows how to swage the ears, and Figure 5 shows how to swage the ears.
FIG. 6 is a front view showing a state in which the fastening hole and the protrusion are locked at the locking position, and FIG. 6 is a longitudinal cross-sectional view of FIG. 5. Further, FIG. 7 is a front view showing the conventional example, FIG. 8 is a view showing the conventional example in use, and FIG. 9 is a view showing the state in which the lug portion is loosened. 8... Boot band, 10, 14... End, 1
1... Ear part, 12, 13... Fastening hole, 15, 16
... protrusion, 17 ... hose, 18 ... pipe.

Claims (1)

[Claims for Utility Model Registration] A band-shaped member is formed into an annular shape, an overlapping margin is set at both ends, and each of the ends is provided with a fastening hole and a protrusion that can be locked in the fastening hole. In addition, the boot band has an ear for tightening at the end that overlaps on the outside, and in the end that overlaps on the outside, the fastening hole or protrusion is connected to the first locking hole on the distal side of the ear. and a second locking position located at a predetermined distance A from this position and closer to the center of the ear, and at the end overlapping with the inner side, the protrusion or fastening hole is provided at a predetermined distance A from this position. A boot band characterized in that the boot band is provided at a predetermined first locking position and a second locking position that are separated by an interval as small as the tightening margin of the ear portion.