JPH0914550A - Fastening band - Google Patents

Abstract

PURPOSE: To improve fastening of a fastened object and make it correspond to aging or creep deformation of the fastened object after fastening, by forming a spring part which acts in the contracting direction in the case of clamping in a band plate. CONSTITUTION: In order to fasten a hose by a fastening band 1, the first operating piece 13 is superposed on an overlapping part 4 on the side of a second operating piece 6, to place the first/second operating pieces 13, 6 adjacent, to form a ring of the fastening band 1 into a small diameter, and a lock pawl 5, in a position improving a fastening condition is inserted, into a lock hole 14. At fastening time, a spring part 15 is placed in a pull energized condition and a periphery of the hose is fastened and kept by a ring-shaped part of a small diameter of the fastening band 1. After fastening, in the case decreasing thickness of the hose, the ring-shaped part is automatically diametrically contracted by spring action in the contracting direction of the spring part. According, the band corresponds to decrease of the thickness after fastening, so that fastening force in a connection part can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tightening band for tightening an object to be tightened at a connecting portion such as a hose-pipe connecting portion or a joint boot.

[0002]

2. Description of the Related Art Conventionally, as a hose band which is attached to a connecting portion between a hose and a pipe and fastens the hose to the pipe,
A hose band 100 having a structure shown in FIG. 15 is known.
That is, as shown in FIG. 15, this conventional hose band 100 comprises a metal band plate 101 and a tightening portion 102 provided at one end portion 101A thereof. The tightening portion 102 is arranged at a connecting portion between a pipe and a hose.
Tighten the other end 101B of the strip 101 so that it surrounds the hose.
A ring-shaped clamp part 104 is formed by being inserted through the 102. Then, by tightening the tightening screw 103 of the tightening portion 102, the tightening screw 10 is inserted into the lateral groove 105 of the end portion 101B of the band plate 101 on the insertion side.
Three screw threads 103A are screwed together to reduce the diameter of the clamp portion 104 and tighten the hose.

A fixing band 200 having a structure shown in FIG. 16 is known as a conventional tightening band used when fixing a boot to a universal joint. This fixed band 20
0 is aligned with both ends 201A and 201B of the strip 201 facing outward,
In addition, the base portion of the bending member 202 that is projected outward is formed into a ring shape by crimping together with the crimping portion 203, and a stopper piece 204 of the bending member 202 is provided in the vicinity of the bending member 202 side. There is something. As shown in FIG. 17, the fixing band 200 is inserted to the mounting side of the boot 206 mounted on the outer ring portion 205 on the driven shaft side, and the bending member 202 is attached.
6 is bent in the direction of the arrow, and is overlapped with the outer surface of the ring-shaped portion as shown in FIG. It is characterized by fixing 202.

[0004]

However, in the above-mentioned conventional hose band 100, when the clamped hose ages or is deformed by creep due to heat, the ring of the band plate 101 becomes the tightening portion 102. Since it is fixed in place, the tightening force is reduced and the sealing property of the hose is reduced. Further, even in the above-described conventional fastening band 200 for fastening, since the diameter state of the fastening band 200 at the time of fastening is maintained, there is a disadvantage that the boot 206 after clamping cannot cope with aging and creep deformation. It was

Therefore, an object of the present invention is to solve the disadvantages of the conventional hose band 100 and the fixing band 200 for tightening, and the tightening of the object to be tightened at the time of mounting is the same as the conventional one. Another object of the present invention is to provide a tightening band which can be satisfactorily achieved and which can cope with aging or creep deformation of the object to be tightened after tightening.

[0006]

In order to solve the above-mentioned problems, the invention of claim 1 is such that one end portion side in the longitudinal direction of a ring-shaped strip plate whose both ends can be overlapped outward. A bent first operation piece and an engaging means are provided, and a locking means for engaging with the engaging means is provided on the other end side in the longitudinal direction, and an outward outward in the longitudinal direction of this end. A tightening band that is provided with a bent second operation piece and is wound around an outer periphery of a tightened body and clamped, wherein a spring portion that acts in a contracting direction when being clamped is formed on the strip plate. It is characterized by

In order to solve the above-mentioned problems, the invention of claim 2 is characterized in that, in the tightening band according to claim 1, the spring part has a structure in which a part of the strip plate is bent outwardly. And

According to a third aspect of the invention for solving the above-mentioned problems, in the tightening band according to the first aspect, the spring portion is
It is characterized in that it is formed as a separate component with a spring material together with the first operation piece and the engaging means, and this separate component is attached to a strip plate of a non-spring material.

[0009]

In the tightening band according to the first aspect, the object to be tightened is clamped by the ring-shaped band plate. The spring portion in the clamped state is in a tensioned state, and when the body to be tightened is aged or creep-deformed, the spring portion acts in the contracting direction to reduce the diameter of the clamp portion.

In the tightening band of claim 2, the spring portion is in a tensioned state when the object to be tightened is clamped, and similarly to claim 1, when the object to be tightened is aged or creep-deformed, the spring portion contracts. Acts in the direction.

According to the third aspect of the present invention, since the spring portion is made of the spring material, the tightening band effectively acts in the shrinking direction when the tightened body is aged or creep-deformed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the structure of a tightening band 1 of this embodiment (which is generally called a hose band because this embodiment is applied to a connecting portion of a hose and a pipe to tighten the hose and the pipe). Show. The tightening band 1 is formed by processing a band plate into a ring shape with both ends facing each other, and has a shape suitable for clamping a body to be tightened such as the hose H.

As shown in FIG. 3, the tightening band 1 of the present embodiment has one end 16 of the connecting member 12 which is a separate component on the end 3 side of the main body 2 which occupies most of the ring shape, and which is indicated by the broken line position in FIG. Is formed as a caulked portion or a spot welded portion 18 (see FIG. 1 for this attached state). A first operation piece 13 bent outward is provided at the outer end of the connecting member 12, and an engaging hole 14 made of a through hole is provided at the inner side of the connecting member 12 in the longitudinal direction. A spring portion 15 is provided further inward from the joint hole 14 so as to be bent outward in a U-shape. The connecting member 12 is made of a metal spring material and exerts a strong spring force that returns to its original shape when both ends of the U-shaped spring portion 15 are pulled open.

The end portion of the main body 2, that is, the first operation piece
The end side facing 13 is a stacking part 4 for covering the lower part of the spring part 15, and a plurality of locking claws 5 are cut and raised at predetermined intervals inside the stacking part 4. The locking claws 5 are engageable with the engaging holes 14 of the connecting member 12 described above. A second operation piece 6 is formed at a position further inward than the locking claw 5 of the present example and is bent to project outward. The second example is made of a metal non-spring material. The tightening band 1 to which the second embodiment and the connecting member 12 are connected is formed in a ring shape larger than the outer diameter of the hose H which is the object to be tightened in advance. In the tightening band 1, the first operating piece 13 and the second operating piece 6 are brought close to each other by a jig (not shown), and one of the locking claws 5 is engaged with the engaging hole 14, thereby With the shape, the object to be tightened can be tightened. When tightening the tightening band 1, one locking claw 5 at an appropriate position among the plurality of locking claws 5 is engaged with the engagement hole 14.

Then, the tightening band 1 in the state shown in FIG.
When tightening the hose H with, for example, the tightening band 1 is inserted through the hose H side to be connected, and then the hose H is inserted around the end of the pipe P as in the conventional case. Hose h
Place the tightening band 1 on the insertion part (connection part) HA of and tighten. That is, in FIG. 1, the first operation piece 13 is overlapped on the overlapping portion 4 on the second operation piece 6 side, and the first operation piece 13 and the second operation piece 6 are brought closer to each other with a tool to tighten the tightening band 1 As shown in FIGS. 5 and 6, by making the diameter of the ring smaller and inserting the locking claw 5 at a position where the tightened state is good, into the engaging hole 14.
Tightening is completed. At the time of tightening, the spring portion 15 is in a state of being urged in tension, and the outer periphery of the hose H is held tightly by the small-diameter ring-shaped portion of the tightening band 1.
Since the locking claw 5 is inserted into the engaging hole 14 of the ring-shaped portion, the ring-shaped portion is held in the tightened ring shape without coming off. The concave portion below the spring portion 15 is covered by the overlapping portion 4, and the hose H
The outer circumference of is evenly tightened.

The connecting portion of the hose H in this tightened state
When heat is applied to the HA or the material of the hose H is aged, the wall thickness of the connecting portion HA decreases as shown by the phantom line K in FIG. 6, so that the tightening band 1 in the engaged state is The tightening force will decrease. Since both ends of the tightening band 1 are engaged with the engagement holes 14 and the locking claws 5, further tightening cannot be performed after tightening, but the spring portion 15 is in a tensioned state during the first tightening operation, When the wall thickness of the hose H after tightening is reduced, the ring-shaped portion is formed by the spring action in the contracting direction of the spring portion 15 (see the arrow direction in FIG. 6). The diameter is automatically reduced. Therefore, the tightening force of the connecting portion HA can be maintained in response to the decrease in the hose wall thickness after tightening.

Since the spring portion 15 of this embodiment is made of a spring material, it positively acts in the direction of contraction with respect to the decrease in the wall thickness of the hose H,
The tightening of the tightening portion HA of the hose H can be favorably maintained for a long period of time.

Next, a second embodiment of the present invention will be described with reference to FIGS.
1 will be described. The tightening band 1 of the above-described embodiment is a separate component (connecting member) made of a spring material provided with a spring portion 15.
12) is attached to the main body 2 made of a non-spring material, the tightening band 21 of this embodiment is integrally formed of a rigid strip plate as shown in FIG.

That is, this tightening band 21 is shown in FIG.
(A) As shown in (b), it is processed from a strip plate made of stainless steel or the like, and is formed into a ring shape with opposite ends as shown in FIG. In FIG. 7, a first operation piece 33 bent outward is provided at one end on the right side of the main body 22 made of a strip plate,
An engaging hole 34 formed of a through hole is provided inward of the end portion in the longitudinal direction.
Is provided, and further inside the engaging hole 34, a spring portion 35 is provided which is bent outward in a substantially U-shape. The shape of the spring portion 35 of this example is shown in FIGS. 7, 8A and 9B.
As shown in Fig. 7, the outwardly projecting U-shaped outer surface is bent inward to form a concave curved surface, and when pulling to open both ends of the spring portion 35, the spring property returning to the original shape is shown. I'm strengthening. The spring portion 35 is not limited to the U-shape, but may be an arcuate shape protruding outward like the spring portion 45 shown in FIGS. An appropriate shape that acts in the shrinking direction can be adopted.

Further, in FIG. 7, the other end portion on the left side of the main body 22, that is, the end portion side facing the first operation piece 33, is a spring portion 35.
Is formed as a stacking part 24 for covering the lower part of the above, and a plurality of locking claws 25 are cut and raised at predetermined intervals inside thereof. Each of the locking claws 25 can be engaged with the engagement hole 34 on the other end side. A second operation piece 26 is formed at a position further inward than the locking claw 25 so as to project outward by bending.
Preliminarily, the tightening band 21 is formed in a ring shape slightly larger than the outer diameter of the object to be tightened.

In the tightening band 21, the first operating piece 33 and the second operating piece 26 are brought close to each other by a jig (not shown), and one of the locking claws 25 at an appropriate position is engaged with the engaging hole 34. Thereby, the tightened body can be tightened.

Then, the tightening band 21 in the state shown in FIG.
When the hose H1 is tightened with, the same procedure as in the first embodiment described above can be performed. That is, the overlapping portion on the second operation piece 26 side
The first operation piece 33 is overlaid on the 24, and the first operation piece 33 and the second operation piece 33
Move the operating piece 26 with a tool to make the ring of the tightening band 21 small in diameter, and engage the locking claw 25 at a position where the tightened state is good.
Tightening is completed by engaging with (see FIG. 10). When tightening, the spring portion 35 is in a state of being urged in tension and the tightening band 21 has a small diameter.
The outer periphery of the hose H1 is clamped and held by 22.

In this tightened state, the pipe P1 and the hose are
When heat is applied to the connection portion HA1 of H1 or the material of the hose H1 is aged, the wall thickness of the connection portion HA1 decreases as shown by the phantom line K1 in FIG. The tightening force of the tightening band 21 decreases. Since both ends of the tightening band 21 are engaged by the engaging holes 34 and the locking claws 25,
After tightening, the spring part cannot be tightened further.
Since 35 is in a tensioned state during the initial tightening operation and has a spring action that returns to the original shape, when the wall thickness of the hose H1 after tightening decreases, the spring part 35 is compressed in the direction of contraction. The spring action (see the arrow direction in FIG. 10) automatically reduces the diameter of the ring-shaped portion. Therefore, the tightening force of the connecting portion HA1 can be maintained in response to the decrease in the hose wall thickness after tightening.

In the above-mentioned first and second embodiments, the tightening bands 1 and 21 are used for the connecting portions HA and HA1 of the pipes P and P1 and the hoses H and H1, but the tightening bands of the present invention are various. For stopping boots (covers) that cover members, or bundled wires
It can be applied to a wide range, such as fasteners. In the above-described first and second embodiments, the engaging holes and the locking claws are used as the means for fixing the both ends in a ring shape, but the engaging holes and the locking claws are the same as those in the above-described embodiments. Not limited to
Appropriate engaging means and locking means that can be engaged and fixed to each other can be used. The overlapping portion covering the concave portion of the spring portion is necessary for improving the tightening property, but can be omitted if the tightening of the tightened body may be rough.

The tightening band 1 of the first embodiment described above is
When tightening the hose H, the end shapes of the tip end of the overlapping portion 4 and the end portion 3 of the main body 2 on the side of the spot welding portion 18 which are opposed (or abut) are cut at right angles to the circumferential direction ( 1 and 2), the end portions 3 and 4 are cut obliquely with respect to the circumferential direction as shown in FIGS. The line L indicates a direction perpendicular to the circumferential direction) and has an oblique shape that can abut each other. When this diagonal shape is used, both ends 3, 4
It is possible to improve the tightening property of the hose H when a gap is formed therebetween. The shape of the end portions 3 and 4 is shown in FIG.
As shown in FIG. 2C, it is possible to improve the tightening property of the hose H as a V shape or a wavy shape (not shown) that can abut against each other.

The second operation pieces 6 and 26 in the tightening bands 1 and 21 of the first and second embodiments described above are the strip-shaped main body 2
The second operation piece 6, 26 is not limited to this shape, but is formed by cutting and raising a predetermined portion of the main body 2, as shown in FIG. 13 (a). It can be configured as a protruding piece 6A or a protruding piece 6B in which a part of the main body 2 is cut and protruded outward as shown in FIG.

The tightening bands 1 and 21 of the first and second embodiments described above are provided with means for preventing lateral displacement between the overlapping portions 4 and 24 and the strip-shaped portions on the side of the first operation pieces 13 and 33 during tightening. Although not shown, the tightening bands 1 and 21 are shown in FIG.
As shown in (b), the overlapping portions 4 and 24 and the first operation pieces 13 and 33
Side slip prevention pieces 50A and 50B that prevent side slippage with the side strip
May be provided. In addition, FIG.
The lateral slip prevention pieces 50 are provided on both sides of the main body 2 at the rear portion of the overlapping portion 4.
FIG. 14B shows an example in which A is provided, and lateral deviation prevention pieces 50B are provided on both sides of the strip portion between the first operation piece 33 and the spring portion 35.

[0028]

In the tightening band according to the first aspect of the present invention, the outer circumference of the object to be tightened is clamped by the strip plate provided with the spring portion, so that the tightening of the object to be tightened can be performed as well as the conventional one. Since the tightening band according to claim 1 is clamped by the strip plate provided with the spring portion that acts in the contracting direction, when the object to be tightened has a reduced diameter such as aging or creep deformation after tightening, By the action of the spring portion, it is possible to perform tightening according to the change in the diameter reduction of the tightened body. Claim 2
In the tightening band according to claim 3 and also in the tightening band according to claim 3, the outer circumference of the object to be tightened is clamped by a strip plate having a spring portion that acts in a contracting direction.
It has the same effect as the tightening band.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tightening band according to a first embodiment.

FIG. 2 is a tightening state diagram of the tightening band of the first embodiment.

FIG. 3 is a side view of a tightening band.

FIG. 4 is an enlarged front view taken along line IV-IV in FIG.

FIG. 5 is a view showing how the tightening band is used.

FIG. 6 is an explanatory view of the action of the tightening band.

FIG. 7 is a perspective view of a tightening band according to a second embodiment.

FIG. 8 is a view mainly showing a spring portion of a tightening band according to a second embodiment, in which (a) is a side view and (b) is a plan view.

FIG. 9A is a development view in which a part of the tightening band of the second embodiment is omitted. (B) is a side view in which a part of the tightening band in a deployed state is omitted.

FIG. 10 is an explanatory view of the action of the tightening band according to the second embodiment.

11A is a side view of a spring portion having another shape, and FIG. 11B is a plan view.

FIG. 12 is a structural view of another example of the shape of the overlapping portion of the tightening band and the shape of the end portion on the caulking portion side of the main body. (A) is a perspective view,
(B) shows a back view and (C) shows a back view of another example.

13A and 13B are views of another example of the second operation piece.

14 (a) and 14 (b) are views showing a main part of a tightening band provided with a lateral shift preventing piece.

FIG. 15 is a perspective view of a conventional hose band.

FIG. 16 is a perspective view of a conventional boot fixing band.

FIG. 17 is a view showing how the fixing band of FIG. 16 is used.

[Explanation of symbols]

 1,21 Tightening band 2,22 Main body 5,25 Locking claw 6,26 Second operation piece 12 Connection member 13,33 First operation piece 14,34 Engagement hole 15,35,45 Spring part 18 Spot weld part

Claims (3)

[Claims] 1. A first operation piece and an engaging means bent outward are provided on one end side in the longitudinal direction of a belt-shaped strip plate whose both ends can be overlapped with each other. On the other end side, a locking means for engaging with the engaging means and a second operating piece bent outward inward in the longitudinal direction of this end are provided, and wound around the outer periphery of the object to be tightened. A tightening band that is attached and clamped, wherein the band plate is formed with a spring portion that acts in a contracting direction when being clamped. 2. The tightening band according to claim 1, wherein the spring portion has a structure in which a part of the strip is bent and formed outward. 3. The spring portion is formed as a separate part by a spring material together with the first operating piece and the engaging means, and the separate part is attached to a strip plate of a non-spring material. The tightening band described in 1.