WO2007010931A1 - Hose clamp - Google Patents

Abstract

A hose clamp device capable of strongly fastening various joint hoses such as a fresh air duct hose for an automobile, manufacturable at low material and manufacturing costs, preventing the hose from being damaged, and coping with a reduction in the outer diameter dimension of the hose when the hose is weathered and deteriorated at its tightened portion to prevent water leakage, air leakage, and disconnection of the hose. The hose clamp device comprises a tightening mechanism (3) having an annular part (9) for inserting the end part of the hose therein formed in a band (2) bent in a loop shape and reducing and increasing the inner diameter of the annular part (9). An insert member (4) having an elasticity energizing the tightening force of the band is inserted between the inner surface of the annular part (9) and the outer peripheral surface of the hose in such a state that the end part of the hose is inserted into the annular part and tightened and clamped. The insert member (4) is formed of a rubber material or a synthetic resin material with elastic force, and comprises circular arc-shaped inner peripheral surface (4a) and outer peripheral surface (4b) curved in the same direction as the inner periphery (9a) of the annular part.

Description

 Specification

 Hose clamp

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a hose clamp device for firmly fastening various joint hoses such as a fresh air duct hose of an automobile to a connection portion.

 Background art

 In a hose clamp device, a hose to be clamped uses a synthetic resin or rubber one, and the hose often deteriorates due to weathering, heat, or the like at its tightening portion. This hose degradation can reduce the outer diameter by as much as lmm or more. For this reason, there is a problem that the tightening force of the hose by the clamping device is reduced, causing water leakage, air leakage, hose disconnection, and the like.

 Conventionally, as a means for preventing the tightening force from being reduced due to the decrease in outer diameter due to hose deterioration as described above, an insert member having elasticity between the outer peripheral surface of the hose and the inner peripheral surface of the hose clamp By responding to changes over time in the hose outer diameter with an invention that responds to changes over time in the hose outer diameter (see Patent Document 1) and a tightening mechanism with an elastic body that biases in the tightening direction The invention (see Patent Document 2) is known.

 Patent Document 1: Japan Patent Gazette 7-26712

 Patent Document 2: Japanese Utility Model Gazette 7-1395

 Disclosure of the invention

 Problems to be solved by the invention

[0004] However, the invention described in Patent Document 1 has a plate panel for applying an elastic force to the insert member, a claw for attaching the insert member to the hose clamp, and an arc shape for contacting the outer peripheral surface of the hose. There are multiple member forces such as plates, and the structure is complicated. For this reason, there is a drawback that the material cost and the manufacturing cost tend to be high. In addition, there is a drawback that the hose clamp band is damaged by the contact between the circular plate of the insert member and the inner peripheral surface of the hose clamp. Furthermore, the hose clamp tightening mechanism forms a part of the inner peripheral surface of the hose clamp, so that the end of the hose in contact with the inner peripheral surface is damaged. Have

 [0005] On the other hand, the invention described in Patent Document 2 requires a plurality of components such as a spring spring receiving a biasing force in the tightening direction. For this reason, the structure is complicated, and there is a drawback that material costs and manufacturing costs tend to be high. Further, since the inner peripheral surface of the hose clamp is uneven, there is a drawback in that the end portion of the hose is damaged as in the case of the invention according to Document 1. In addition, when using springs, there is a problem that the coil springs and the panel panel itself are damaged due to incomplete materials or elastic fatigue.

 [0006] In order to solve the above problems, an object of the present invention is to reduce the number of parts of the hose clamp that can cope with the reduction of the hose diameter caused by hose deterioration, simplify the structure, and reduce the cost. .

 Another object of the present invention is to prevent the outer periphery of the hose from being damaged by the inner surface of the annular portion of the hose clamp.

 Another object of the present invention is to prevent the insert member itself from being damaged like a coil spring or a plate panel.

 Means for solving the problem

[0009] This hose clamp for solving the above-mentioned problems is firstly formed with an annular portion 9 for inserting the end portion of the hose into the band 2 bent in a loop shape, and the annular portion 9 is provided with a tightening mechanism 3 for reducing and enlarging the inner diameter of 9 and inserted between the inner surface of the annular portion 9 and the outer peripheral surface of the hose with the hose end inserted into the annular portion and clamped. In the case where the insert member 4 having elasticity that urges the tightening force of the band is provided, the insert member 4 becomes a rubber or synthetic resin material having elasticity, and is the same as the inner periphery 9a of the annular portion. It has an arcuate inner peripheral surface 4a and outer peripheral surface 4b that are curved in the direction.

 [0010] Second, the insert member 4 is positioned on the inner peripheral surface 3a side of the tightening mechanism 3.

 [0011] Third, the position is determined by adhesively fixing the insert member 4 to the inner peripheral surface 3a of the tightening mechanism 3.

[0012] Fourthly, a protrusion 11 protruding toward the outer peripheral surface 4b side of the insert member 4 is provided, and the protrusion The position of the band 2 and the insert member 4 is determined by locking the base 11 to the inner surface of the band 2.

[0013] Fifth, the present invention is characterized in that protrusions 12 for restricting movement in the width direction with respect to the band 2 are provided partially or continuously on both sides of the outer peripheral surface 4b of the insert member 4 in the width direction.

[0014] Sixth, the insert member 4 is characterized in that the cross-sectional shape thereof is formed into a trapezoidal cross section having an inclined surface that is inclined toward the inner side of the annular portion 9.

[0015] Seventh, a fixed band 2 that forms a loop, and a movable pressing piece 13 that is housed in the loop and has an arcuate inner surface that forms an annular portion 9 facing the inner surface of the loop, It is characterized by comprising a tightening mechanism that reduces the inner diameter of the annular portion 9 by moving the movable pressing piece 13 relative to the inner surface of the loop.

 The invention's effect

 [0016] By integrally molding the insert member with rubber or synthetic resin material having inertia, the number of parts can be reduced and the manufacturing cost can be kept low.

 [0017] By manufacturing the insert member with elastic rubber or synthetic resin material, damage to the band due to contact between the insert member and the band of the hose clamp can be prevented.

 [0018] Since the inner circumferential surface and the outer circumferential surface of the hose clamp annular portion are both arcuately curved along the inner circumferential surface side of the hose clamp annular portion when the insert member is mounted, the hose can be inserted without difficulty. .

 [0019] By positioning the insert member at the tightening mechanism portion on the inner peripheral surface side of the hose clamp annular portion, the hose can be easily inserted, and the hose end portion is formed by unevenness on the inner periphery of the hose clamp annular portion. Injury can be prevented.

[0020] Since the cross-sectional shape of the insert member is formed in a trapezoidal shape having an inclined surface inclined toward the inside of the annular portion, it is possible to prevent the insert member from protruding to both sides of the hose clamp due to elastic deformation during tightening. it can.

[0021] Since the insert member can be applied to various hose clamps 1, it has high versatility.

Brief Description of Drawings FIG. 1 is a perspective view showing an embodiment of a hose clamp device of the present invention.

 FIG. 2 is a front view showing an embodiment of the hose clamp device of the present invention.

 FIG. 3 is an internal view of the insert member in a developed state.

 FIG. 4 is an enlarged cross-sectional view of the expanded state of the insert member.

 FIG. 5 is a perspective view showing another embodiment of the insert member.

 6 is an enlarged cross-sectional view of the insert member shown in FIG.

 FIG. 7 is a perspective view showing another embodiment of the hose clamp device.

 FIG. 8 is a front view showing another embodiment of the hose clamp device.

 BEST MODE FOR CARRYING OUT THE INVENTION

1 to 6 show an embodiment according to the present invention, and a hose clamp according to the embodiment.

1 includes a tightening mechanism 3, a tightening band 2, and an insert member 4.

The tightening mechanism 3 is a so-called worm type, and includes a holding body 6 fixed to one end of the band 2 and a tightening bolt 5 that is rotatably held by the holding body 6.

 The band 2 is curved in a ring shape, and both ends thereof are slidably overlapped with each other in the support 6, and the inner end is a fixed end 2 a fixed to the support 6. On the other hand, the outer end is slidably inserted into the support 6 and constitutes a movable end 2b protruding from one end of the support 6.

 The support 6 is composed of a boss portion 6a for screwing the bolt 5 to the outer peripheral side and a band holder 6b for holding the band 2 through. On the outer peripheral surface of the movable end 2b inside the boss 6a, there is formed a threaded portion 8 that also has an uneven force to mate with the thread of the bolt 5.

 By rotating the bolt 5 by the above mechanism, the movable end 2b of the band 2 is driven in the arc direction, and the inner diameter of the annular portion 9 changes to a large or small size. The hose end portion is tightened by the contraction change of the annular portion 9.

The insert member 4 is also a rubber or synthetic resin material having elasticity, and is attached to the arc-shaped inner peripheral surface 3 a of the tightening mechanism 3 that is a part of the inner periphery of the annular portion 9. The insert member 4 is arranged along the inner peripheral surface 9a of the hose clamp annular portion and the outer peripheral surface 4a so that the insert member 4 can be easily inserted between the inner peripheral surface 9a of the hose clamp annular portion and the outer peripheral surface of the hose. Both faces 4b are formed in a talent shape curved in a circular arc. Insert member 4 is inside band 2 It may be deformed into a circular arc shape by being attached to.

 [0026] The insert member 4 is located between the inner peripheral surface 9a of the hose clamp annular portion and the outer peripheral surface of the hose, and by tightening the tightening mechanism 3, the hose clamp 4 is hose by the elastic force of the insert member 4. The force works in the direction of tightening. As a result, when the hose is weathered and deteriorated at its tightening part, it is possible to cope with a decrease in the outer diameter and to avoid the occurrence of water leakage and air leakage.

 [0027] The insert member 4 is attached to a position that covers the concave and convex surfaces from the inner side to protect the hose from the concave and convex surfaces on the inner peripheral surface of the band 2 and the inner surface of the band holder 6b. The insert member 4 is positioned by a positioning structure described later. The material of the insert member 4 has as much heat resistance as possible, and is sufficiently elastic to follow the diameter reduction due to hose deterioration (for example, a material with a thickness of 5 mm and a tightening torque of 5 to 6 N). It is desirable to have hardness 70-90) in the case of 'm.

 [0028] As shown in Figs. 3 and 4, the insert member 4 is chamfered into a shape that converges in an arc shape by urging part of both side corners inside the cross section toward both side ends. As a result, the cross section of the central portion of the insert member 4 is formed in a trapezoidal shape having an inclined surface 10 inclined toward the inside of the annular portion 9. This cross-sectional shape can prevent the insert member 4 from protruding from both ends of the band 2 when the insert member 4 is pressed and deformed.

 In the case shown in FIG. 1, the insert member 4 is positioned and fixed by adhering to the inner peripheral surface 3a of the band holder 6b. However, as shown in FIG. 5, the insert member 4 can also be positioned by providing projections 11 and 12 . The protrusion 11 is protruded from the center of one end of the insert member 4 and is for fitting with an engagement hole 7 (see FIG. 1) provided at a corresponding position on the inner peripheral surface 9a of the hose clamp annular portion. The protrusions 12 are provided on both sides of the outer peripheral surface 4 b of the insert member, and restrict the movement of the insert member 4 in the inner peripheral direction and the width direction with respect to the band 2. Thus, the insert member 4 is reliably positioned at an appropriate position on the inner peripheral surface 9a of the hose clamp annular portion.

In the above embodiment, the protrusion 11 and the protrusion 12 are provided on the insert member 4, but a band is fitted to the center of the outer peripheral surface by forming a continuous protrusion on the outer peripheral 4b surface side of the insert member. It is also possible to position the insert member 4 by forming a mating groove. [0030] On the other hand, Figs. 7 and 8 show another embodiment of the invention relating to the elastic structure of the hose clamp 1, and the hose clamp 1 is also a tightening mechanism, as in the previous embodiment. A band 2 and an insert member 4 are provided.

 [0031] The hose clamp 1 has a loop shape, and a base end portion of the hose clamp 1 is attached to a holding body 6 constituting a nut.

 An arc-shaped movable press that adjusts the diameter of the annular portion 9 by moving it with respect to the inner surface of the loop distal end side by forming a part of the annular portion 9 within the loop shape and moving together with respect to the inner surface of the loop tip side. A clamping mechanism having a piece 13 is provided.

 As shown in FIG. 7, the pressing piece 13 is connected to one end of the bolt 5, and a knob 14 is formed on the other end of the bolt 5. The bolt 5 is screwed into the holding body 6 and fixed to the fixing band 2. By rotating the bolt 5, the pressing piece 13 is moved with respect to the inner surface of the loop, thereby adjusting the inner diameter of the annular portion 9. It becomes possible to do.

 An insert member 4 is interposed between the arc-shaped pressing piece 13 and the outer peripheral surface of the hose.

 The insert member 4 is made of a rubber or synthetic resin material having elasticity as in the case of the above-described embodiment, and the inner peripheral surface 4a and the outer peripheral surface 4b are both bent in an arc shape along the arc-shaped pressing piece 13. It has a shape. As a result, when the hose is tightened due to the elastic force of the insert member 4 between the arc-shaped pressing piece 13 and the outer peripheral surface of the hose, a force acts in the tightening direction. Can handle changes over time.

 The insert member 4 has four protrusions 12 for positioning on the movable pressing piece 13 as in the case of the embodiment (see FIG. 7).

 Industrial applicability

[0035] The hose clamp of the present invention can be used, for example, in hoses for transporting automobiles, various working vehicles and other mechanical devices and fuels, and other fluids.

Claims

 The scope of the claims  [1] A tightening mechanism (3) that forms an annular part (9) into which the end of the hose is inserted into a band (2) bent in a loop shape, and reduces the inner diameter of the annular part (9). ) And inserted between the inner surface of the annular part (9) and the outer peripheral surface of the hose with the hose end inserted into the annular part and clamped to urge the tightening force of the band. In addition to the elastic insert member (4) provided, the insert member (4) becomes elastic rubber or synthetic resin material force, and the inner circumference (9a) of the annular portion Hose clamp that has an arcuate inner circumference (4a) and outer circumference (4b) curved in the same direction!  [2] The hose clamp according to claim 1, wherein the insert member (4) is positioned on the inner peripheral surface (3a) side of the tightening mechanism (3).  [3] The hose clamp according to claim 1, wherein the hose clamp is positioned by adhesively fixing the insert member (4) to the inner peripheral surface (3a) of the tightening mechanism (3). [4] Protrusions (11) projecting toward the outer peripheral surface (4b) side of the insert member (4) are provided.  The hose clamp according to claim 1, wherein the band (2) and the insert member (4) are positioned by engaging the inner surface of the band (2). [5] The protrusion (12) for restricting movement in the width direction with respect to the band (2) is provided partially or continuously on both sides in the width direction of the outer peripheral surface (4b) of the insert member (4). Hose clamp. [6] The hose clamp according to claim 1, wherein the insert member (4) is formed in a trapezoidal cross-section with an inclined surface that is inclined by an inward force toward the inside of the annular portion (9). [7] The hose clamp according to claim 2, 3, 4 or 5, wherein the cross-sectional shape of the insert member (4) is formed in a trapezoidal cross section having an inclined surface inclined by an inward force toward the inside of the annular portion (9). [8] A fixed band (2) that forms a loop, and a movable pressing piece (13) that has an arcuate inner surface that is accommodated in the loop and forms an annular portion (9) facing the inner surface of the loop, The tightening mechanism (3 ') for reducing and expanding the inner diameter of the annular portion (9) by moving the movable pressing piece (13) relative to the inner surface of the loop. , 5 or 6 hose clamps.