KR100262814B1 - Clamping band - Google Patents

Abstract

It is an object of the present invention to provide a clamping band 1 with a simple structure that can be manufactured effectively. Another object is to provide a clamping band 1 which can be clamped firmly and easily attached. In the clamping band 1 of the present invention, the metal band section 2 has a first end 2a formed of a Y-shaped fork 2a having a pair of fork pieces. A pair of concave sections 8 are formed at each side edge of the band section 2. The recessed section 8 can receive a fork piece. The clamping ear 3 is formed by bending a part of the band member 2. The clamping ear 3 provides a predetermined position where both end sections of the band member 2 overlap when the band section 2 is formed in a loop.

Description

Clamping band {CLAMPING BAND}

The present invention relates to a clamping band for tightly clamping a fastening member, for example a radiator pipe of a motor vehicle, a joint section of a transmission mechanism.

Conventionally, in the universal joint of the transmission mechanism of a motor vehicle, grease was applied to the bearing and the joint member as lubricating oil. The joint member is covered with a rubber or plastic cover and the cover is tightly fastened by the clamping band. And the radiator pipe is connected to the radiator to prevent water leakage and is waterproofed by the clamping band.

The applicant of the present invention invented a clamping band with a clamping ear, which can be firmly fastened without causing a spring back (Japanese Patent Laid-Open No. 3-163294). The clamping band is composed of two parts, a band member and a clamping member. The band member is a loop-shaped metal band, and a coupling clamp is formed at one end of the band member. The clamping member has a clamping ear at the center. One end of the clamping member is spot welded on the band member, and the engagement hole is drilled on the other side of the clamping ear.

For example, in the case of clamping a fastening member such as a hose connected with a pipe, the member is first inserted through a looped clamping band and the clamping band is located in the connection section of the member and the pipe. In order to fasten and fix the member, the clamping ear is compressed in the circumferential direction of the band member to reduce its diameter. By reducing the diameter of the band member, the engaging forceps can be engaged with the engaging holes. By engaging the engaging forceps with the engaging holes, the reduced diameter of the band member can be held firm even if the spring back of the elastic or compressed clamping ear of the member to be fastened attempts to enlarge the diameter of the band member.

However, since the conventional clamping band is composed of two parts, the band member and the clamping member, it is difficult to accurately weld the clamping member at a predetermined point in the band member, so that the manufacturing efficiency cannot be increased. When the diameter of the band member decreases, the step section is formed in the overlapped portion, where the band member and the clamping member overlap at the inner surface of the loop-shaped band member and the clamping member is easy to displace in the transverse direction of the band member. The step section and the displacement can be absorbed if the member to be fastened is made of an elastic material such as rubber. However, recently, the joint member of the universal joint is covered with a plastic cover so that grease in the cover will leak out by the step section or the displacement portion. Moreover, in the case of clamping, for example long hoses, the hose is inserted through the clamping band, which is welded to form a loop before connecting the hose with the other member. In other words, it is cumbersome to attach the clamping band to the long member after the long member is connected.

An object of the present invention is to provide a clamping band with a simple structure that can be made effectively.

Another object is to provide a clamping band that can be firmly fastened and easily attached.

1 is a perspective view of a clamping band of a first embodiment of the present invention;

2A is a plan view of the band section of the first embodiment;

2B is a front view of the band section;

2C is a partial front view of the second end section of the band section in which the clamping ear is formed;

2D is a front view of the clamping band formed into a loop shape;

FIG. 2E is a partial plan view showing the engaged state of the first engaging hole and the engaging piece; FIG.

FIG. 2F is a partial sectional view showing an engaged state of the first engaging hole and the engaging piece; FIG.

Fig. 2G is a partial plan view showing the engaging hole of the band member.

2H is a partial plan view showing a first end section of the band member;

3A is a perspective view of a clamping band formed in a loop shape;

3b is a perspective view of the clamping band in which the clamping ear is compressed in the circumferential direction of the band member;

4 is a front view of the clamping band in which the clamping ear is compressed in the circumferential direction of the band member;

5 is a plan view of a tool for compressing a clamping ear;

6 is a perspective view of the clamping band of the second embodiment;

7A is a front view of the clamping band of the second embodiment;

7B is a partial perspective view of the first end section of the band member of the second embodiment;

7C is a partial perspective view of the second end section of the band member of the second embodiment;

8 is a perspective view of the clamping band of the third embodiment;

9A is a front view of the clamping band of the third embodiment;

9B is a partial perspective view of the first end section of the band member of the third embodiment;

9C is a partial perspective view of the second end of the band member of the third embodiment;

To achieve this object the clamping band of the present invention is:

A clamping band having a clamping ear having a first end and a second end of the metal band section overlapping to form a ring shape, wherein the clamping ear is bent outwardly to the outer metal band section of the overlapping portion. The metal band section is formed in a Y shape such that the first end of the inner side is easily bent outward from both sides in the width direction among the overlapping portions, and the width of both sides of the metal band section in the predetermined position of the outer metal band section. Is concave section is formed to accommodate the Y-shaped end to the outside, and by pressing the clamping ear to press the fastening, by reducing the diameter of the metal band section formed into a ring shape to close the Y-shaped end to the concave section The Y-shaped end portion and the ring-shaped inner circumferential surface continuous to the Y-shaped end portion are accommodated in the shape of a shape to be almost the same.

The clamping band of the present invention is provided with a joining piece standing outwardly in the vicinity of an inner two-pronged end, and a long hole through which a hole is drilled at a predetermined position of the outer metal band section.

When the clamping band of the present invention presses and compresses the clamping ear with a tool, the joining piece standing up in the inner metal band section moves in the direction of reducing the diameter of the long hole punched in the outer metal band section as a guide. .

The clamping band of the present invention is formed with a semi-dome-shaped coupling portion protruding outward to the inner metal band section, the coupling hole is formed in the outer metal band section through the coupling portion to couple the coupling portion to the edge. .

The clamping band of the present invention has a joining section that can be joined to the inner wall of the joining portion when entering the joining portion formed in the inner metal band section at the edge of the joining hole formed in the outer metal band section.

In the clamping band, the concave section is arranged to receive the fork piece of the Y-shaped fork when the clamping ear is compressed in the circumferential direction of the loop so that the inner surface of the loop has no step.

In the clamping band of the present invention, the clamping band can be composed of only one part, so that the number of parts and manufacturing steps can be reduced and manufacturing precision can be increased.

When the clamping ear is compressed in the circumferential direction, the fork piece of the Y-shaped fork is fitted and received in the concave section so that the inner surface of the loop-shaped band section can be formed without a step. By forming a stepless flat inner surface, the clamping band can be clamped securely and firmly. Therefore, the safety and reliability of the clamping band can be raised.

If the first engaging hole is a long hole in which the engaging piece guides the movement direction when the clamping ear is compressed in the circumferential direction of the loop-shaped band section, a part of the overlapped portion of the band section is prevented from being displaced in the transverse direction.

When the band section is formed in a loop by engaging the engaging piece with the first engaging hole on one side of the clamping ear and engaging the engaging section with the second engaging hole on the other side, the clamping band is easily detached from any member to be fastened. Can be.

Embodiments of the present invention will be described by way of example with reference to the accompanying drawings.

Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The first embodiment will be described.

In FIG. 1, the metal band section 2 of the clamping band 1 is connected to the first end 2a in the inner part A of the band section 2 and to the outer part B of the band section 2. The second end 2b is provided. The first end section 2a of the band section 1 is formed of a Y-shaped fork having a pair of fork pieces as shown in Fig. 2A. The band section 2 has a pair of concave sections 8, which are formed at each side edge of the band section 2 by bending a portion of each side edge outward. The recessed section 8 can accommodate fork pieces of the Y-shaped fork 2a, respectively. The recessed section 8 is located at a position where the fork pieces of the Y-shaped fork 2a are respectively accommodated when the clamping band 1 is in the clamped state (see FIG. 4). In this embodiment, the band section is made of relatively soft stainless steel, for example SUS 430 (JIS), 6 mm wide, 0.8 mm thick and 236 mm long.

The clamping ear 3 is formed at a position corresponding to the portion where the loop-shaped band section overlaps. The clamping ear 3 is formed into a gate shape by bending the band section outward. The clamping ear 3 is the so-called Oetiker's ear, and is thus compressed in the circumferential direction of the looped band section by the tool 7 (see FIG. 5). By compressing the clamping ear 3, the diameter of the looped band section 2 can be reduced and tightened.

In the vicinity of the Y-shaped fork 2a, the engaging piece 4 protrudes outward. The engaging piece 4 can be engaged with the first engaging hole 5, which is drilled at a position corresponding to the Y-shaped fork 2a when the band section 2 is formed in a loop shape (Fig. 2E). And FIG. 2F). The first coupling hole 5 is an elongated hole drilled in the longitudinal direction of the band section 2. With this structure, the band section can be formed in a loop shape while the coupling piece 4 is coupled to the first coupling hole 5.

The second end section 2b is fixed to the outer surface of the band section 2 at position 6 by resistance welding. By welding the second end section 2b, the band section 2 can be held closely in a loop shape. The welding position 6 can be formed accurately at a predetermined position by engaging the engaging piece 4 with the first engaging hole 5, so that the welding position 6 of the clamping band 1 is predetermined with high positional accuracy. It may be located at the position of.

Next, the manufacturing steps of the clamping band 1 will be described with reference to Figs. 2A-2H.

In the band section 2, the joining piece 4, the concave section 8, the elongated first joining hole 5, the clamping ear 3 and the welding point 6 from the first end or the Y-shaped fork 2a It is arrange | positioned at the 2nd end 2b.

The Y-shaped fork 2a is formed in the first end section to form a narrow fork piece. By having a narrow fork piece, the fork piece of the Y-shaped fork 2a tends to bend radially outward when the clamping ear 3 is compressed to reduce the diameter of the band section 2.

The recessed section 8 is formed by bending a portion of each side edge of the band section 2 radially outwardly with a die punch machine. As mentioned above, the concave section 8 is positioned to receive the fork piece of the Y-shaped fork 2a when the clamping ear 3 is compressed. The depth of the concave section 18 compresses the clamping ear 3 so that the radially outwardly fork piece is fitted and received in the concave section, and the inner surface of the loop-shaped band section 2 is formed flat without step sections. Designed (see FIG. 4).

Cutting the band section 2 to make a tongue piece; The engaging piece 4 is formed by bending the tongue-like member outward to form the L-shape (see FIG. 2B).

The long first engagement hole 5 is drilled at a position corresponding to the Y-shaped fork 2a when the band section 2 is formed in a loop shape (see FIG. 2E). Initially, the engaging piece 4 is located at one end of the first engaging hole 5, which is the end at the side of the first end 2a due to the elasticity of the band section 2. In this initial state, the distance between the engaging piece 4 and the second end 2b is always constant, so that the welding point 6 can be easily positioned at a predetermined position with high positional accuracy (see FIG. 2D).

The clamping ear 3 is provided with the recessed part 3a in the upper surface. The recess 3a is formed in the flat band section 2 before the clamping ear 3 is formed into a gate shape (see FIG. 2A). When the clamping ear is compressed to reduce the diameter of the looped band section 2, the stress in the clamping ear 3 is absorbed by the recess 3a so that the upper surface of the clamping ear 3 is deformed outward. Is prevented. Moreover, the clamping ear 3 can resist springback, and the increase in diameter of the band section 2 can be reliably prevented by forming the recess 3a.

In order to reliably perform resistance welding at the welding point 6, a recess 6a is formed near the second end 2a corresponding to the welding point 6. The bottom surface of the recess 6a may contact the outer surface of the band section 2, which is located below the recess 6a (see FIG. 2A). The current for resistance welding passes between the innermost face of the welding point 6 and the outermost face thereof, and the recess 6a is hot melted so that the welding point 6 is formed flat.

The band section 2 positions the engaging piece 4 in the first engaging hole 5 in the initial position; And resistance welding the second end section 2a to the welding point 6; It is formed in a loop shape. In this embodiment, the clamping band 1 is composed of only one component and no complicated mechanism is required, so that the manufacturing efficiency is increased and the manufacturing cost can be reduced. Moreover, the clamping band 1 can be firmly and securely fastened.

In order to clamp the fastening member, first, the fastening member is inserted through the loop-shaped clamping band 1, which clamping ear 3 is not compressed as shown in FIG. 3A, thereby clamping the clamping band 1. Set to the clamping position of the member to be fastened. Then, the clamping ear 3 is compressed in the circumferential direction of the band section 2 by the tool 7 (see FIG. 5) so as to reduce the diameter of the looped band section 2. The reduced diameter of the clamping band 1 is shown in FIG. 3b.

The tool 7 has a pair of arms 7a, 7b, which, like a pair of pliers (see FIG. 5), are rotatably connected and intersect with each other at the point of intersection.

When the clamping ear 3 is compressed by the tool 7, the Y-shaped fork 2a moves in the direction of decreasing diameter. And the fork piece of the Y-shaped fork 2a is easily bent radially outward by the force Fa, which acts to reduce the diameter of the band section 2 and the reaction force Fb from the fastening member is It acts to enlarge its diameter. By bending outward of the fork piece, the fork piece is fitted and received in the concave section 8, so that the inner surface of the loop-shaped band section 2 is formed flat without the step section (see FIG. 4), and the clamping band ( 1) can uniformly clamp the fastening member. With uniform clamping, the clamping band 1 can clamp the member firmly and reliably, thereby increasing the stability and reliability of the clamping band 1.

After compressing the clamping ear 3, the increase in diameter of the band section 2 caused by the elasticity of the member to be fastened can be defined by welding with the recess 3a.

When the clamping ear 3 is compressed by the tool 7, the Y-shaped fork 2a first moves in the direction of the force Fa (see FIG. 3B), reducing the diameter of the band section 2, and The engaging piece 4 is guided by the elongated first hole 5 and moves in the same direction; Then, the Y-shaped fork 2a moves slightly in the direction of the force Fb (see FIG. 3B) to enlarge the diameter of the band section 2, and the engaging piece 4 is engaged with the first hole 5 and fastened. Fully tighten the member. In this case, the mutual displacement of the portions of the band section 2 overlapping each other in the transverse direction is guided in the circumferential direction of the band section 2 by the long first hole 5.

Next, a second embodiment of the clamping band of the present invention will be described with reference to FIGS. 6 and 7A to 7C. Elements shown in the first embodiment are denoted by the same reference numerals and description thereof will be omitted.

In the first embodiment, the band section 2 of the clamping band 1 is formed in a loop shape by welding at point 6 before being attached to the member to be fastened. In order to easily handle the clamping band, the clamping band 1 of the second embodiment can be detached from the member to be fastened, which is already connected to another member without separating the member. The band section 2 can be detachably coupled to form a loop instead of resistance welding (see Fig. 6).

As well shown in Figs. 7A to 7C, two second engagement holes 2c are formed in the vicinity of the Y-shaped fork 2a. The second coupling hole 2c cuts the band section 2 to make two cutting holes; And embossing the edges of the cutting holes to form a similar dome (see FIGS. 7A and 7B). On the other hand, two engaging sections 2f are formed near the second end 2b. The engaging section 2f drills a hole 2e having a tongue-like member 2f; And it is made by forming the L-shaped by bending the tongue-like member (2f) inward (see Figs. 7a and 7c). When the band sections 2 are formed in a loop shape, the coupling sections 2f can be inserted into the dome-shaped second coupling holes 2c, respectively, to be joined to each other.

The clamping band 1 forms a band section in a loop shape; Engaging the engaging piece 4 with the first hole 5; The coupling portion 2f is formed into a loop shape by engaging the second coupling hole 2c. The band section 2 is joined at both sides of the clamping ear 3.

With this structure, the clamping band 1 can be easily detached from the member to be fastened after the member is connected to the other member.

As described above, since the clamping band is composed of only one component, the number of components and manufacturing steps can be reduced, so that the manufacturing cost can be reduced; Manufacturing precision can be increased.

When the clamping ear is compressed, the fork piece of the Y-shaped fork fits into the recessed section and is received so that no step section is formed on the inner surface of the looped band section. By forming a flat inner surface without step sections, the clamping band can be firmly and securely fastened. Therefore, the stability and reliability of the clamping band can be raised.

When the clamping ear is compressed, when the engaging piece has an elongated first engaging hole for guiding its movement, the portion of the overlapping section of the band section is prevented from being displaced in the transverse direction.

In the case where the band section is formed into a loop, the clamping band is easily removed from any member to be fastened, by engaging the joining piece with the first joining hole on one side of the clamping ear and the joining section with the second joining hole on the other side. Can be detached.

In the case of a recess in the upper surface of the clamping ear, the stress in the clamping ear is absorbed when the clamping ear is compressed so that the clamping ear can resist the springback and the increase in the diameter of the band section can be reliably prevented.

In the case where a recess for resistance welding is provided near the second end of the band section, resistance welding for fixing the second end can be effectively performed.

A third embodiment of the clamping band of the present invention will be described with reference to FIGS. 8 and 9A to 9C. Elements shown in the first and second embodiments are denoted by the same reference numerals and description thereof will be omitted.

In the first and second embodiments, the engaging piece 4 is formed in the first end section 2a of the band section 2; When the band section 2 is formed in a loop, a long hole 5 is formed at a position corresponding to the engaging piece 4. With this structure, the engaging piece 4 is guided by a long hole when the clamping ear 3 is compressed. The engagement piece 4 and the long hole 5 are not necessary in this embodiment.

As well shown in Figs. 8 and 9A to 9C, two second engagement holes 2c are formed in the vicinity of the Y-shaped fork 2a. The second coupling hole 2c cuts the band section 2 to make two cutting holes; It is formed by embossing the edges of the cut holes to make a similar dome (see FIG. 9B). On the other hand, two engaging sections 2f are formed near the second end 2b. The engaging section 2f drills a hole 2e having a tongue-like member 2f; The tongue-like member 2f is bent inward to form an L-shape (see FIGS. 9A and 9C). The coupling sections 2f may be respectively inserted into the dome-shaped second coupling holes 2c to be coupled to each other when the band sections 2 are formed in a loop shape.

The clamping band 1 forms a band section in a loop shape; Engaging the engaging piece 4 with the first hole 5; The coupling section 2f is formed into a loop shape by combining with the second coupling hole 2c.

In this embodiment, it is preferably made of stainless steel of SUS 304 (JIS) having a thickness of about 0.6 mm. The thickness (approximately 0.6 mm) of the band section 2 of the present invention is thinner than the thickness (approximately 0.8-1.0 mm) of the band made of SUS 430, so that the sealing affected by the step section at the overlapping portion of the band section 2 Performance can be improved. And the band section 2 of the present embodiment has a greater malleability, so that the clamping band 1 can clamp the member fastened with a greater force. Even when clamping a member with a lower elasticity, the sealing performance can be kept higher by clamping with greater force.

Without the joining piece 4 and the long hole 5 in the band section 2, the band section 2 can be formed in a loop shape by joining the joining section 2f with the second joining hole 2c, The manufacturing cost of the clamping band 1 can be reduced.

When the diameter of the loop-shaped clamping band 1 is reduced by compressing the clamping ear 3, the overlapping portions A and B of the band section 2 prevent the transverse displacement of the band section 2 in the transverse direction. . By adopting the thin band section 2, the fork piece of the Y-shaped fork 2a is easy to bend or bend radially outward so that the fork piece can be easily accommodated in the concave section 8 without the step section. Moreover, the clamping band 1 can be easily detached from the member to be fastened to increase work efficiency.

The present invention can be embodied in other specific forms without departing from the spirit or essential features thereof. The present examples are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes within the scope and meaning of the claims It is included.

Claims (5)

The first end 2a and the second end 2b of the metal band section 2 overlap each other and are formed in a ring shape, and out of the overlapped portions, the outer end of the metal band section 2 is formed in a door shape. In the clamping band (1) with the bent clamping ear (3), The metal band section 2 is formed in a Y shape such that the first end 2a of the inner side of the overlapping portion is easily bent outward from both sides in the width direction, and the predetermined portion of the outer metal band section 2 is formed. The concave section 8 is formed at the position to bend the widthwise both sides of the metal band section 2 to the outside to accommodate the Y-shaped end portion 2a, and by pressing the clamping ear 3 to tighten it, A metal band section 2 formed in a ring shape is reduced in diameter so that the Y-shaped end portion 2a is brought into close contact with the concave section 8, and the Y-shaped end portion 2a and a ring continuous thereto Clamping band (1) characterized in that the shape inner peripheral surface is made substantially the same surface. 2. The coupling piece (4) according to claim 1, further comprising a coupling piece (4) standing outwardly in the vicinity of the inner two-pronged end (2a), and a hole at a predetermined position of the outer metal band section (2). Clamping band (1), characterized in that it has a long hole (5) to which 4) is engageable. The method of claim 2, wherein when the clamping ear (3) is inserted into the tool (7) and pressed to compress, the coupling piece (4) standing in the inner metal band section (2) is the outer metal band section (2). Clamping band (1), characterized in that for moving the long hole (5) punched in the) in the direction of diameter reduction as a guide. 2. The semi-dome-shaped coupling portion 2c protruding outward is formed in the inner metal band section 2, and the coupling portion 2c enters the outer metal band section 2. The clamping band (1), characterized in that the coupling hole (2e) is formed to be coupled to the end of the coupling portion (2c). 5. The engaging portion as set forth in claim 4, wherein the engaging portion (2c) formed in the inner metal band section (2c) enters the edge of the engaging hole (2e) formed in the outer metal band section (2). (2c) A clamping band (1) characterized in that a joining section (2f) is formed on the inner wall.

Images