JP3324939B2 - Hose clamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose clamp used for tightening a hose against a tubing.

[0002]

2. Description of the Related Art Conventionally, various hose clamps have been proposed which are used for tightening a hose against a pipe. Japanese Utility Model Laid-Open Publication No. 56-122890 discloses a hose clamp as an example.

[0003] As shown in FIG. 8, a hose clamp 41 made of an elastic flat material is provided with a clamp portion 42 and first and second hose clamps.
Protruding end portions 43 and 44. Second projecting end 44
A notch 46 is formed therebetween. Clamp part 42
Has elasticity, the first and second protruding end portions 43 and 44 relatively move along the cut portion 46, so that the clamp portion 42 bends and its inner diameter is changed. FIG. 8 shows a state where the diameter of the clamp portion 42 is reduced, and the inner diameter of the clamp portion 42 is D5. In this state, the inner diameter of the clamp portion 42 is smaller than the outer diameter of the hose 47.

On the other hand, as shown in FIG. 9, the first protruding end 43 and the second protruding end 44 are brought close to each other and the two protruding ends 43, 44 are arranged in a line, so that the clamp portion 42 is formed. Is in an expanded state. At this time, the clamp 42
Has an inner diameter extending to D6 (> D5) and is larger than the outer diameter of the hose 47. Here, by clamping the both protruding end portions 43 and 44 using the clip 48, the clamp portion 42 is maintained in a state where the diameter is increased.

Accordingly, first, the diameter of the clamp portion 42 of the hose clamp 41 is increased in this manner, and the hose 47 and the steel pipe 49 are connected to each other while the hose 47 is passed through the clamp portion 42. Thereafter, the hose clamp 41 is connected to the end of the hose 47. The hose 47 is pressed against the steel pipe 49 by the elastic force of the hose clamp 41 by disposing the clip 48 after the arrangement. In the hose clamp 41,
Even if the first and second protruding ends 43 and 44 are clamped by using a tool (not shown) such as pliers instead of the clip 48, the clamp portion 42 is maintained in an expanded state.

[0006]

In the clamp 41 described in the above publication, in order to maintain the expanded diameter of the clamp portion 42, the first and second projecting end portions 43, 44 are clamped. It is necessary to use an appropriate holding tool such as a clip 48 or pliers. However, once the hose clamp 41 is attached to the hose 47, the holding tool becomes unnecessary. Further, when removing the holding device, a large force of an operator is required due to the elastic force of the clamp portion 42, and the holding device may jump and scatter due to the elastic force of the clamp portion 42. In addition, especially when the clip 48 is used as a holding tool, the cost increase cannot be ignored.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to be able to maintain a diameter-expanded state without separately using a clip or other holding tool, and to easily expand the diameter. An object of the present invention is to provide a hose clamp capable of releasing a state and tightening a hose.

[0008]

According to one aspect of the present invention, there is provided a hose clamp for tightening an end of a hose to which a tube is attached, the hose clamp comprising two ends. It has a ring shape of variable diameter where the parts intersect, and when both ends are in a free state, it is provided at both ends of the clamp part, which is urged by its own elasticity in the direction to reduce the diameter from the outer diameter of the hose The first and second engaging portions are provided with each other, and the first and second engaging portions are engaged with each other against the urging force of the clamp portion. While maintaining the expanded state , the second
Moving the engagement portion upward with respect to the first engagement portion;
With the first and second engagement portions being disengaged,
Then, the second engagement portion is moved downward with respect to the first engagement portion.
The engagement between the first and second engagement portions is also released by
It is intended to be done.

According to the above configuration, in the free state,
The clamp portion has a ring shape, and its inner diameter has a predetermined size. By engaging the first engagement portion and the second engagement portion with each other, the clamp portion is in a state where the diameter is larger than in the free state. As long as both engagement parts are engaged,
The state of the clamp unit is maintained. In this state, the hose clamp is attached to a hose having an outer diameter slightly smaller than its inner diameter, and the second engaging portion is connected to the first engaging portion.
The hose is pressed by the elastic force of the clamp portion by releasing the engagement of the first and second engagement portions only by moving the hose upward or downward with respect to the hose.

[0010] The invention according to claim 2 is a hose clamp used for tightening the end of a hose to which a pipe material is attached, wherein the hose clamp has a variable diameter ring shape in which both ends intersect. when a free state, Bei clamp portion that is biased in a direction to be reduced in diameter than the outer diameter of the hose by its own elasticity
Hose clamps
At one end is formed a first end, which is divided into two.
And the first end, which is split into two,
When they are formed so that the distance between them becomes smaller as they go
Both extend outward of the ring at the tip of the first end.
The first engaging portion is provided, while the both ends of the clamp portion are provided.
At the other end, the tip of the first end divided into two
A second end portion formed between the first engagement portions formed at
And both sides of the second end portion sandwiched by the first engagement portion
A concave portion serving as a second engaging portion is provided on the surface, and the first and second engaging portions are engaged with each other against the urging force of the clamp portion, so that the outer diameter of the hose is reduced. The purpose is to keep the diameter larger than the diameter.

According to the above configuration, the second divided
The first engagement portions provided at the distal end portion of the first end portion are on the inner side.
Engages with the concave portion serving as the second engagement portion by the urging force toward
The state where the second end is held is obtained. For this reason, the first
As long as the engaging portion clamps the second end, the clamp portion is increased in diameter.
The state is maintained. In this state, the hose clamp
Attached to a hose with an outer diameter slightly smaller than its inner diameter
The first and second engagement portions are extended to both sides, so that
And the second engagement portion is disengaged, and the hose is
Crimping is performed by the elastic force of the locking part. In addition, the first and second
The shape of the end is simple.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hose clamp according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the structure of a hose clamp 11 according to this embodiment. As shown in the figure, the hose clamp 11 has a ring-shaped clamp portion 12,
It has first and second end portions 13 and 14 provided at both ends of the clamp portion 12. The hose clamp 11 is formed by press-forming a flat plate made of spring steel.

The inner diameter of the clamp portion 12 can be changed by bending the clamp portion 12. The first end 13 has an insertion hole 15 formed along the circumferential direction, and the first end 13 is bifurcated on the base end side of the insertion hole 15. As shown in the drawing, the insertion hole 15 has a narrow portion 17 in the middle along the circumferential direction, and wide portions 16 are provided on both sides in the circumferential direction with the narrow portion 17 as a boundary. Further, the narrow portion 17 is provided with a step 18 having a step shape as a first engagement portion in the illustrated embodiment.
At the first end portion 13, a first grip portion 19 extending outward from the ring is formed at a tip end of the step 18.

The second end 14 is inserted through the insertion hole 15,
It is in a state of intersecting with the first end 13. The width of the second end portion 14 is smaller than that of the clamp portion 12 to such an extent that the narrow portion 17 of the insertion hole 15 can be inserted. In the middle of the second end 14, there is provided a projection 20 as a second engagement portion projecting from both side surfaces of the end 14. A step 21 is provided on the base end side of the projection 20. The width of the projection 20 is wider than the width of the narrow portion 17 of the insertion hole 15 and narrower than the width of the wide portion 16, and the projection 20 engages with the step 18 of the first end 13. It is possible. At the second end portion 14, the second gripping portion 2 extending outward from the ring is provided at a position beyond the protrusion 20.
2 are formed.

FIG. 1 shows an initial state of the hose clamp 11, and this state is defined as a "free state". In the free state, the protrusion 20 is located outside the insertion hole 15, and the inner diameter of the clamp portion 12 is in a reduced diameter state indicated by D1.

Next, a method of using the hose clamp 11 will be described with reference to FIGS. As shown in FIG. 2, the first and second gripping portions 19,
By moving the 22 closer to each other, the clamp 12 flexes and its inner diameter increases. Then, after the projection 20 is passed through the wide portion 16 of the insertion hole 15 and brought to the back surface of the first end 13, the projection 20 is slightly returned and the projection 20 is engaged with the step 18, whereby the clamp portion 12 is engaged. Is held in an expanded state. Here, the state where the diameter of the clamp portion 12 is expanded is defined as “diameter expanded state”. Protrusion 2
As long as the 0 and the step 18 are engaged with each other, the diameter of the clamp portion 12 is maintained in an enlarged state. In the expanded state, the inner diameter of the clamp portion 12 has expanded to D2 (> D1).

In connecting and mounting the rubber hose 25 to the rigid pipe 26, the hose clamp 11 is provided on the hose 25 so as to surround the hose 25 in this expanded state in advance. Here, the outer diameter of the hose 25 is larger than the inner diameter D1 of the clamp portion 12 in the free state, and smaller than the inner diameter D2 of the clamp portion 12 in the expanded state.

Then, as shown in FIG. 3, after connecting the hose 25 and the rigid pipe 26, the hose clamp 11 is disposed at the end of the hose 25, and the engagement between the projection 20 and the step 18 is released. The hose 25 is crimped (tightened) to the rigid pipe 26.

Next, a method for releasing the engagement between the projection 20 and the step 18 will be described with reference to FIGS. FIG. 4A shows an expanded state in which the projection 20 and the step 18 are engaged. Here, as shown in FIG. 4B, by raising the second gripping portion 22 upward and moving the projection 20 to the wide portion 16 of the insertion hole 15, the second gripping portion 22 is caused by the elastic force of the clamp portion 12. The second end 22 passes through the insertion hole 15 so that the protrusion 20 protrudes to the front side of the first end 13.
As a result, the hose clamp 11 returns to the free position as shown in FIG.

Alternatively, in a state where the diameter of the hose clamp 11 is expanded, as shown in FIG. 4C, the second grip 22 is hit downward. As a result, the projection 20 comes off below the step 18 as the second end 14 moves downward. Also, in this case, the second end 14 moves through the insertion hole 15 of the first end 13 in the direction in which the inner diameter of the clamp 12 becomes smaller due to the elastic force of the clamp 12.
The position returns to the free state as shown in FIG.

As described above, when the second end portion 14 returns to the position in the free state, the clamp portion 12 generates an elastic force in an inward direction. The hose 25 is pressed against the rigid pipe 26 by this elastic force. Hose 25
Is crimped, so that the hose 25 and the rigid pipe 26
The fluid flowing inside is prevented from leaking from the connection between the hose 25 and the rigid pipe 26.

(1) As described above, the protrusion 20 is
, It is possible to maintain the diameter-expanded state without separately using a holding tool such as a clip. (2) In this embodiment, the engagement between the protrusion 20 and the step 18 can be easily released only by lifting the second grip portion 22 upward or hitting it downward, and the hose 25 is tightened. can do. Moreover, at that time, since the holding tool does not exist as described above, it does not scatter.

(3) In this embodiment, since the clamp 11 is made to be in the expanded state, it is not necessary to use a holding tool as conventionally used, so that the cost can be suitably reduced. .

(4) In this embodiment, the first and second grippers 19 and 22 are moved closer to each other,
The diameter of the hose clamp 11 can be expanded without requiring a large force. Therefore, it is possible to reduce the physical load on the worker performing such work, including the release of the engagement.

Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and the description of those members will be omitted. Particularly, different points will be mainly described.

FIGS. 5 and 6 are perspective views showing the structure of the hose clamp 31 according to the second embodiment, and FIG. 7 is a plan view of FIG. Hose clamp 3 of this embodiment
1, the shape of the first and second end portions 32, 33 is the first
Is different from the embodiment. In particular, the first end 13 is divided into two parts 32a, 32b separated by a cut 35.
And two on both sides at the tip of the second end 33.
Two recesses 34 are provided. At the end of each first end 32 there is provided a first grip 36 extending outwardly, and similarly at the end of second end 33 a second outwardly extending ring.
Is provided. Here, the first end 32
The distance between the portions 32a and 32b becomes smaller toward the tip of each of the portions 32a and 32b.

FIG. 5 shows a free state of the hose clamp 31. The inner diameter of the clamp portion 12 is in a reduced diameter state indicated by D3. In the free state, both parts 32a, 32b
Are slightly widened, and the ends of both portions 32a and 32b are biased inwardly of each other by their own elastic force.
Therefore, the second end 33 is pressed by the two first grips 36 while being sandwiched from both sides thereof.

Here, the second grip 37 is moved closer to the first grip 36. Thereby, FIG. 6 and FIG.
As shown in (1), each of the first grips 36 is engaged with the recess 34 by the inward biasing force, so that the second end 33 is sandwiched. For this reason, as long as the two first grips 36 hold the second end 33, the diameter of the clamp 12 is maintained in the expanded state. At this time, the inner diameter of the clamp portion 12 is D4 (>
D3).

As described above, after the hose clamp 31 in the expanded state is mounted on the hose 25 on the rigid pipe 26,
The first gripping portion 36 and the concave portion 34 are disengaged from each other by expanding the gripping portion 36 to both sides. Accordingly, the hose 25 is connected to the rigid pipe 2 by the elastic force of the clamp portion 12.
6 is crimped.

Therefore, also in this embodiment, the clamp portion 12 can be maintained in an expanded state without using a separate holding tool, and the expanded state can be easily released to connect the hose clamp 31 to the hose 25. Can be tightened.

In this embodiment, the first and second ends 3
Since the shapes of 2, 33 are simple, they can be easily manufactured. Note that the present invention can be embodied in another embodiment as follows. In the following another embodiment, the same operation and effect as the above embodiment can be obtained.

(A) In the hose clamp 11 of the first embodiment, the second end 14 may have a plurality of projections 20 which can be engaged with the step 18 in the circumferential direction. Further, in the hose clamp 31 of the second embodiment, the second end 33 may have a plurality of recesses 34 that can be engaged with the first grip 36 in the circumferential direction. According to this configuration, according to the outer diameter of the hose 25,
By changing the engagement position, the inner diameter of the clamp portion 12 can be changed.

Further, technical ideas other than the claims that can be grasped from the above embodiment will be described below together with their effects. (A) The hose clamp according to claim 1 or 2, wherein the first engagement portion has a plurality of engagement positions at which the second engagement portion can engage.

According to this configuration, the size of the inner diameter of the clamp portion can be adjusted by changing the engagement position where the second engagement portion engages.

[0036]

According to the first aspect of the present invention, the first and second engagement portions are engaged with each other against the urging force of the clamp portion, so that the clamp portion is reduced in outer diameter of the hose. Is also maintained in the expanded state, while the second engagement portion is in the first state.
By moving it upward or downward with respect to the engaging portion, the first
And the engagement of the second engagement portion is released .

Accordingly, by engaging the first engagement portion and the second engagement portion with each other, the clamp portion is in a state in which the diameter is larger than in the free state. As long as both engagement portions are engaged, the clamp portion is kept in that state. In this state, the hose clamp is attached to the hose and the second
Is moved upward or downward with respect to the first engagement portion.
The hose is pressed by the elastic force of the clamp portion by releasing the engagement of the first and second engagement portions only by pressing. Therefore, it is possible to maintain the pincer clips or the like while suitably enlarged without using separately, and the simple operation of releasing the engagement of the engaging portion, more
The second engaging portion upward or downward with respect to the first engaging portion.
The effect that the hose can be tightened by an operation such as moving is exerted.

According to the second aspect of the present invention, the clamp
One of the two ends of the part has a first split
An end is formed and the first end, separated into two,
So that the distance between them becomes smaller toward the tip
Is formed, and the tip of the first end is
An outwardly extending first engagement portion is provided while a clamp is provided.
The other end of the end of the part has a first end divided into two
A second engagement portion sandwiched between a first engagement portion formed at a tip portion of the portion
The second end is formed and sandwiched by the first engagement portion.
Recesses serving as second engagement portions are provided on both side surfaces of the end portion, respectively.
Can be

Therefore, the tip of the first end which is divided into two parts
The first engagement portions provided at the ends are biased inward.
The second end portion is engaged with the concave portion serving as the second engagement portion by force, and the second end portion is
It will be in the state of being pinched. Thus, each first engagement portion is
As long as the end of No. 2 is clamped, the clamped part maintains the expanded state
Is done. Then, in this state, the hose clamp is
Attached to a hose with an outer diameter slightly smaller than the inner diameter of
And the first and second engagement portions are extended to both sides, so that the first and the second
2 is disengaged, and the hose is
Is pressed by the elastic force of For this reason, it is possible to maintain a state in which the diameter is suitably expanded without separately using a holding tool such as a clip , and only to release the engagement of the engaging portion.
To demonstrate the effect of Ru can be tightening a hose by a simple operation. Also, the shape of the first and second ends is
Simple and easy hose clamp according to the present invention
Can also be manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a hose clamp in a reduced diameter state.

FIG. 2 is a perspective view showing the hose clamp in an expanded state.

FIG. 3 is a perspective view showing a state where a hose clamp is attached.

FIG. 4 is a side view showing an engagement portion.

FIG. 5 is a perspective view showing a hose clamp according to a second embodiment.

FIG. 6 is a perspective view showing a hose clamp according to a second embodiment. .

FIG. 7 is a plan view showing a hose clamp according to a second embodiment.

FIG. 8 is a perspective view showing a conventional hose clamp with a reduced diameter.

FIG. 9 is a perspective view showing a conventional hose clamp in an expanded state.

[Explanation of symbols]

11 ... Hose clamp, 12 ... Clamp part, 18 ... First
, A step as an engaging portion, 20... A projection as a second engaging portion, 25... A hose, 34... A concave portion as a second engaging portion,
36: A first grip as a first engagement portion.

Continuing from the front page (72) Inventor Hiroki Okada 1st Hirukiike, Haruki, Togo-cho, Aichi-gun, Aichi Prefecture Inside of Togo Works Co., Ltd. (72) Inventor Rei Rei Kimura, 1st Haruki-shi, Haruki, Togo-cho, Aichi-gun, Aichi Stock (56) References Japanese Utility Model Hei 5-83581 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 33/02

Claims (2)

(57) [Claims] 1. A hose clamp used for tightening an end of a hose to which a tube material is attached, wherein the hose clamp has a ring shape of a variable diameter whose both ends cross each other, and when the both ends are in a free state, the hose clamp has its own shape. A clamp portion biased by elasticity in a direction to be reduced in diameter from the outer diameter of the hose; and first and second engagement portions provided at both ends of the clamp portion, respectively. by engaging together said first and second engagement portions against a biasing force, while maintaining the clamp portion in a state of well being expanded than the outer diameter of said hose, said second engagement The joint is the first
By moving it upward with respect to the engaging portion,
And the second engagement portion is released from engagement with the second engagement portion.
Is moved downward with respect to the first engaging portion.
Also, the engagement between the first and second engagement portions is released.
Hose clamp characterized by being done. 2. A hose clamp used for tightening an end of a hose to which a tube material is attached, wherein the hose clamp has a ring shape of variable diameter with both ends crossing each other. A hose having a clamp portion which is urged by elasticity in a direction in which the outer diameter of the hose is reduced.
In the ground clamp, one of the two ends of the clamp portion is separated into two.
A first end is formed, and the two separated first ends are formed.
The distance between the ends of the first end is smaller toward the front end.
And the tip of the first end.
A first engagement portion extending outwardly of the ring;
On the other hand, the other end of both ends of the clamp portion is separated into two.
The first engagement member formed at the tip of the first end
A second end portion sandwiched between the joining portions is formed, and the first engagement portion is formed.
The second end portion sandwiched by the
Concave portions serving as engaging portions are provided , and the first and second engaging portions are engaged with each other against the urging force of the clamp portion , so that the clamp portion is enlarged beyond the outer diameter of the hose. A hose clamp characterized in that the hose clamp is maintained at a diameter.