JP2012077783A - Hose clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hose clamp that can quickly clamp hose connections.SOLUTION: A partially-opened annular clamping part 1, a first piece 2 connected to one end 10a of the clamping part 1 so as to be turnable, and a second piece 3 connected to the outside middle 10c of the other end 10b of the clamping part 1 and the first piece 2 are integrally molded with resin, an engagement protrusion 1b is formed at the outer periphery of the clamping part 1, and an engagement part 2a engaged with the engagement protrusion 1b is formed at the tip of the first piece 2.

Description

  The present invention relates to a hose clamp that fixes and fixes a hose connection portion from the outside.

  Conventionally, as shown in Patent Document 1, there is a hose clamp that fastens and fixes a hose connection portion from the outside. The hose clamp shown in Patent Document 1 has a structure in which both ends of a ring-shaped metal band are fixed to face each other to form a lever portion, and the lever portion is bent by the action of a lever to bind an object. is there. After binding the object, in order to prevent loosening of the binding, it is necessary to fix the lever portion to the metal band with a metal fitting, and there is a problem that workability is poor. Moreover, since the hose clamp shown by patent document 1 is metal and is manufactured by machining or welding, the manufacturing cost was applied.

  In view of this, as shown in Patent Document 2, a hose clamp having a structure in which a hinge is hooked and contracted by an annular fastening band that is partially opened to bind an object is proposed.

Japanese Patent Laid-Open No. 48-50158 Japanese Utility Model Publication No. 55-19404

However, in the hose clamp shown in Patent Document 2, it is necessary to hook the hinge to the tightening band while maintaining the closed state of the opening of the tightening band, and there is a problem that the hose connection part cannot be fastened. Moreover, since the resin-made hose clamp is easy to deform | transform like patent document 2, there existed a problem that it shifted | deviated sideways and attached | detached easily after an assembly | attachment.
An object of this invention is to provide the hose clamp which solves the said problem and can fasten a hose connection part quickly.

The invention according to claim 1, which has been made to solve the above problems,
An annular bondage part that is partially open,
A first piece pivotably connected to one end of the binding part;
A second piece rotatably connected to the other end of the binding part and an intermediate part on the outside of the first piece,
Molded integrally with resin,
An engagement protrusion is formed on the outer periphery of the binding portion,
An engaging portion that engages with the engaging protrusion is formed at the tip of the first piece.

The invention according to claim 2 is the invention according to claim 1,
A protrusion is formed on at least one of the binding portion and the first piece,
At least one of the binding portion and the first piece is formed with a protrusion intrusion portion into which the protrusion enters when the engagement protrusion engages with the engagement portion.
Thereby, in the state in which the engaging portion is engaged with the engaging protrusion, the protrusion enters the protrusion intruding portion. For this reason, the first piece is not displaced from the binding portion in the thickness direction, and the engagement portion and the engagement protrusion are prevented from being released.

The invention according to claim 3 is the invention according to claim 1 or 2,
A misalignment prevention projection is formed on the inner peripheral surface of the binding portion.
As a result, when the hose connection portion is tightly bound by the hose clamp, the slip prevention protrusion bites into the hose, the hose clamp is less likely to be displaced from the hose, and the hose clamp is prevented from falling off the hose connection portion.

  According to the present invention, an annular binding part that is partially open, a first piece that is pivotally connected to one end of the binding part, the other end of the binding part, and the first piece The second piece rotatably connected to the middle part of the outside is integrally formed of resin, an engagement protrusion is formed on the outer periphery of the binding portion, and the tip of the first piece is An engaging portion that engages with the engaging protrusion is formed. For this reason, since the operator completes the binding work of the hose by a simple operation of rotating the first piece and engaging the engaging portion with the engaging protrusion, the hose connecting portion is quickly bound. Workability is improved.

It is a perspective view of a hose clamp showing an embodiment of the invention. It is the perspective view which looked at the resin hose clamp of FIG. 1 from another angle. It is a front view of a hose clamp showing an embodiment of the invention. It is a front view of the hose clamp at the time of tight binding. It is A arrow directional view of FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The hose clamp 10 of the present invention is made of an elastic synthetic resin such as polypropylene. As shown in FIG. 3, the hose clamp 10 is rotatably connected to an annular (arc-shaped) binding part 1 that is partially opened and one end (first fulcrum 10 a) of the binding part 1. The second piece connected to the first piece 2 and the other end (second fulcrum 10b) of the binding part 1 and the outer middle portion (third fulcrum 10c) of the first piece 2 so as to be rotatable. The piece 3 is integrally formed of resin. The hose clamp 10 is completely closed by the binding portion 1, the first piece 2, and the second piece 3.

  All of the first fulcrum 10a, the second fulcrum 10b, and the third fulcrum 10c are thin. For this reason, the first piece 2 is rotatable with respect to the binding portion 1, and the second piece 3 is rotatable with respect to the binding portion 1 and the first piece 2.

  On the inner peripheral surface of the binding portion 1, a deviation preventing projection 1 a is formed at a constant angle in the circumferential direction. On the outer peripheral surface of the binding portion 1, an engagement protrusion 1 b is projected. The base of the engagement protrusion 1b is narrower than the other parts. The engagement protrusion 1b is formed at a position away from the first fulcrum 10a by a predetermined distance.

  A hook-shaped engagement portion 2 a is formed at the tip of the first piece 2. The inner shape of the engaging portion 2a is a shape corresponding to the outer shape of the engaging protrusion 1b. For this reason, the engaging part 2a and the engaging protrusion 1b are engaged. In the present embodiment, the outer shape of the engaging portion 2a bulges outward. As shown in FIG. 3, when the first piece 2 is opened, the distance between the engaging portion 2a and the second fulcrum 10b is larger than the distance between the engaging protrusion 1b and the second fulcrum 10b. Is shorter.

  As shown in FIGS. 1 to 5, projections 1 c and 1 d projecting outward are formed on the outer side between the engagement projection 1 b of the binding portion 1 and the first fulcrum 10 a. The protrusions 1c and 1d are plate-shaped. As shown in FIG. 5, the protrusion 1 c is formed along one edge portion (the back side of the paper in FIG. 3) of the binding portion 1 in the thickness direction. Further, the protrusion 1d is formed along the other edge portion (the front side of the drawing in FIG. 3) of the binding portion 1 in the thickness direction. As shown in FIG. 3 and FIG. 5, the protrusion intrusion 1e is notched at the edge (the front side in FIG. 3) of the binding portion 1 in the thickness direction at the position where the protrusion 1c is formed. Is formed. Further, a protrusion intrusion portion 1f is cut out at an edge portion (the back side of the drawing in FIG. 3) opposite to the binding portion 1 in the thickness direction at the position where the protrusion 1d is formed.

  As shown in FIGS. 1 to 5, projections 2 b and 2 c projecting inward are formed on the inner side between the engaging portion 2 a of the first piece 2 and the first fulcrum 10 a. The protrusions 2b and 2c are plate-shaped. As shown in FIG. 5, the protrusion 2 b is formed along one edge of the first piece 2 (the front side in FIG. 3) in the thickness direction. Further, the protrusion 2c is formed along the other edge portion (the back side of the paper in FIG. 3) of the binding portion 1 in the thickness direction. As shown in FIG. 3 and FIG. 5, the protrusion intrusion 2d is located on the opposite edge of the first piece 2 in the thickness direction at the position where the protrusion 2d is formed (the back side in FIG. 3). Is notched. Further, a protrusion intrusion portion 2e is cut out at an edge portion (the front side of the drawing in FIG. 3) on the opposite side of the first piece 2 in the thickness direction at the position where the protrusion 2c is formed.

  Next, the usage method of the hose clamp 10 of this invention is demonstrated. The operator inserts the hose into the hose clamp 10 of the present invention. Next, an operator connects a hose to the connection part of a hose. Next, the operator pushes the engaging portion 2a, rotates the first piece 2 in a direction in which the engaging portion 2a approaches the engaging protrusion 1b, and engages the engaging portion 2a with the engaging protrusion 1b. (State of FIG. 4). As the first piece 2 rotates, the first fulcrum 10a is pulled toward the second fulcrum 10b by the second piece 3, and the distance between the first fulcrum 10a and the second fulcrum 10b is reduced. The inner diameter of the binding portion 1 is reduced, and the hose connection portion is bound by the hose clamp 10. In the present invention, since the moving distance of the engaging portion 2a is larger than the proximity distance between the first fulcrum 10a and the second fulcrum 10b, the hose clamp 10 is bound with the hose connection portion at a low load. Is possible. In the present embodiment, since the outer shape of the engaging portion 2a bulges outward, it is easy for an operator to press the engaging portion 2a with a finger.

  In a state where the hose is tightly bound by the hose clamp 10, even if a force acts in the direction in which the binding part 1 expands, the direction of the force that the binding part 1 tries to expand and the engaging part 2 a are engaged. Since the direction away from the protrusion 1b is substantially orthogonal, the engagement between the engagement portion 2a and the engagement protrusion 1b is not released. On the other hand, when the engaging portion 2a is pulled up by hand, the engaging portion 2a and the engaging projection 1b can be easily disengaged, and the state where the hose clamp 10 is tightly bound to the hose connecting portion is easily released. can do.

  In a state where the engaging portion 2a is engaged with the engaging protrusion 1b, the protrusion 1c enters the protrusion intrusion portion 2d, the protrusion 1d enters the protrusion intrusion portion 2e, and the protrusion 2c enters the protrusion intrusion portion 1e. The protrusion 2c enters the protrusion intrusion portion 1f. For this reason, the 1st piece 2 does not shift | deviate with respect to the binding part 1 regarding the thickness direction, and cancellation | release of engagement with the engaging part 2a and the engaging protrusion 1b is prevented.

  In addition, in the state where the hose connection part is tightly bound by the hose clamp 10, the displacement preventing projection 1 a formed on the inner peripheral surface of the tightly bound part 1 bites into the hose, and the hose clamp 10 is difficult to be displaced with respect to the hose. The drop-out from the 10 hose connections is prevented.

When the hose clamp 10 of the present invention is used, the operator can complete the hose binding work by a simple operation of rotating the first piece 2 and engaging the engaging portion 2a with the engaging protrusion 1b. As a result, the hose connection portion can be quickly bound and workability is remarkably improved.
Since the hose clamp 10 of the present invention is manufactured by integral molding with a synthetic resin, it can be manufactured without increasing costs.

  In the embodiment shown in the figure, the engaging portion 2a formed at the tip of the first piece 2 has a hook shape, and the inner shape of the engaging portion 2a corresponds to the outer shape of the engaging protrusion 1b. However, the shapes of the engagement protrusion 1b and the engagement portion 2a are not limited to this, and any shape may be used as long as the engagement protrusion 1b and the engagement portion 2a engage with each other.

  Although the present invention has been described above in connection with the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein. However, the present invention can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification, and a hose clamp with such a change is also to be understood as being included in the technical scope. Don't be.

DESCRIPTION OF SYMBOLS 1 Binding part 1a Dislocation prevention protrusion 1b Engagement protrusion 1c protrusion 1d protrusion 1e Protrusion intrusion part 1f Protrusion intrusion part 2 1st piece 2a Engagement part 2b Protrusion 2c Protrusion 2d Protrusion intrusion part 2e Protrusion intrusion part 3 2nd piece 10 Hose clamp 10a First fulcrum 10b Second fulcrum 10c Third fulcrum

Claims (3)

An annular bondage part that is partially open,
A first piece pivotably connected to one end of the binding part;
A second piece rotatably connected to the other end of the binding part and an intermediate part on the outside of the first piece,
Molded integrally with resin,
An engagement protrusion is formed on the outer periphery of the binding portion,
The hose clamp is characterized in that an engaging portion that engages with the engaging protrusion is formed at the tip of the first piece. A protrusion is formed on at least one of the binding portion and the first piece,
2. The hose clamp according to claim 1, wherein at least one of the binding portion and the first piece is formed with a protrusion intrusion portion into which the protrusion enters when the engagement protrusion engages with the engagement portion.   The hose clamp according to claim 1 or 2, wherein a displacement preventing projection is formed on an inner peripheral surface of the binding portion.

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