JP2024004319A - band clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a band clamp capable of reducing stress concentration on a position serving as a fulcrum when rotating a band.

SOLUTION: A band clamp 10 comprises a band part 12 that is wrapped around a linear member, a lock part 14 that fastens the band part 12 in a wrapped state, and a connection part 16 that connects the band part 12 and the lock part 14. The band part 12 has an engaging part. The lock part 14 has: a pair of side wall parts 32; an insertion part 34 that is provided between the pair of side wall parts 32, into which the band part 12 can be inserted, and that forms an inlet and an outlet of the band part 12; and an engaged part formed in the insertion part 34 and engaged with the engaging part. The connection part 16 has a shape that is bifurcated from the band part 12 side, and is connected only to the respective side surfaces of the pair of side wall parts 32.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a band clamp for holding a linear member.

Patent Document 1 discloses a band clamp that includes a band portion that is wound around a member to be bound, and a lock portion to which the base end of the band portion is connected. The lock portion includes an insertion path through which the tip of the band portion is inserted, and a lock pawl that is disposed within the insertion path and engages with the engagement protrusion of the band portion. The base end of the band portion is connected to the upper surface of the lock portion.

Japanese Patent Application Publication No. 2010-151320

In the technique disclosed in Patent Document 1, especially when fastening small-diameter members to be bound, there is a risk that the base end of the band portion may be bent significantly and stress may be excessively concentrated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a band clamp that relieves stress concentration at a position that serves as a fulcrum when rotating a band.

In order to solve the above problems, a band clamp according to an aspect of the present invention includes a band part that is wound around a linear member, a lock part that fastens the wrapped band part, and a connecting part that connects the band part and the lock part. and. The band portion has an engaging portion. The lock part is provided between a pair of side wall parts, is capable of inserting the band part, and has an insertion part forming an entrance and an exit of the band part, and an engagement part formed in the insertion part. and an engaged portion that is engaged with. The connecting portion has a shape that is bifurcated from the band portion side, and is connected only to the side surfaces of the pair of side wall portions.

According to the present invention, it is possible to provide a band clamp that relieves stress concentration on a position that becomes a fulcrum when rotating a band.

It is a perspective view of the band clamp of an Example. It is a perspective sectional view of a band clamp. FIG. 3(a) is a front view of the band clamp, and FIG. 3(b) is a side view of the band clamp. It is a side view of the band clamp in the state which held the linear member.

FIG. 1 is a perspective view of a band clamp 10 according to an embodiment. Moreover, FIG. 2 is a perspective sectional view of the band clamp 10. 3(a) is a front view of the band clamp 10, and FIG. 3(b) is a side view of the band clamp 10.

The band clamp 10 is used to attach a wire member such as a harness or piping to a member to be attached such as a vehicle body panel or an interior panel. The linear member held by the band clamp 10 may be composed of one harness, or may be composed of a plurality of harnesses tied together.

The band clamp 10 includes a band portion 12, a lock portion 14, a connecting portion 16, and a fixing portion 18. The fixed part 18 has a flange part 26, a shaft part 28, and elastic leg parts 30. The fixing part 18 is located below the locking part 14 and is fixed to the member to be attached. The flange portion 26 is formed in an umbrella shape so as to project outward in the radial direction.

The shaft portion 28 hangs down from the center of the flange portion 26 . A pair of elastic legs 30 are formed to face each other with the shaft 28 in between. The pair of elastic leg portions 30 extend from the lower end side of the shaft portion 28 toward the flange portion 26 so as to be folded back, and are formed to be flexible. The pair of elastic legs 30 engage with the back edge of a mounting hole formed in the member to be attached, thereby fixing the band clamp 10 to the member to be attached. Note that the fixing portion 18 is not limited to being fixed by snap-fitting, but may be bonded or fixed using a separate fixture.

The band portion 12 has an engaging portion 20, a band edge 22, and a protrusion 24. The band portion 12 is formed into a belt shape and is wound around a linear member. As shown in FIG. 2, the engaging portion 20 is formed in a multi-stage claw shape along the longitudinal direction of the band portion 12. As shown in FIG. The band edge 22 shown in FIG. 1 is formed into a rib shape along the longitudinal direction of the band portion 12. A plurality of protrusions 24 are formed side by side in the longitudinal direction and are located on the back side of the engaging part 20. The band edge 22 and the protrusion 24 come into contact with the wound linear member to prevent the linear member from shifting.

The lock portion 14 has a side wall portion 32, an insertion portion 34, a bottom portion 35, a pedestal portion 36, an engaged portion 38, a mounting portion 40, and a central rib 42. The lock part 14 fastens the band part 12 in a wrapped state. The lock portion 14 is formed into a rectangular square tube shape, and defines an insertion portion 34 that passes through the lock portion 14 . The insertion section 34 has an entrance 34a and an exit 34b as shown in FIG. 3(b), and the band section 12 is inserted through the entrance 34a and taken out through the exit 34b.

A pair of side wall portions 32 are formed to stand up from the bottom portion 35 on the fixed portion 18 side, and are arranged to face each other. The bottom portion 35 and the pedestal portion 36 are arranged vertically to face each other, and together with the pair of side wall portions 32 define the insertion portion 34 . The insertion portion 34 is provided between the pair of side wall portions 32 and allows the band portion 12 to be inserted therethrough.

As shown in FIG. 2, the engaged portion 38 is formed within the insertion portion 34 and has a two-stage claw shape. The engaged portion 38 extends from the bottom portion 35 and is flexible. The engaged portion 38 is engaged with the engaging portion 20 of the band portion 12 inserted into the insertion portion 34. Note that the engaged portion 38 may extend from the pedestal portion 36, and in that case, the engaging portion 20 of the band portion 12 is arranged on the opposite side of the arrangement shown in FIG.

The pair of mounting parts 40 and the central ribs 42 are formed on the surface side of the pedestal part 36, and are formed into protrusions along the penetrating direction of the insertion part 34. The mounting portion 40 is located at both edges of the upper surface of the lock portion 14 in the width direction, is located above the side wall portion 32, and is located at the upper end of the lock portion 14. The mounting portion 40 and the central rib 42 function as a contact rib that comes into contact with the linear member. The distance between the pair of placement parts 40 is larger than the distance between the pair of band edges 22.

The connecting portion 16 has a bifurcated portion 44 and a convex portion 46 . The connecting portion 16 connects the band portion 12 and the lock portion 14. The connecting portion 16 has a shape that is bifurcated from the band portion 12 side, and is connected only to the side surfaces 32a of the pair of side wall portions 32, respectively. When the band portion 12 wraps around the linear member, it rotates about the connection position 50 of the connection portion 16 as a fulcrum. Since the connection position 50 of the connection part 16 is located on the side surface 32a of the side wall part 32, it can be moved away from the linear member compared to the case where it is provided on the upper surface of the lock part 14. Therefore, when the band portion 12 winds the linear member, the degree of twist at the connecting position 50 of the connecting portion 16 can be relaxed, and stress concentration on the connecting position 50 of the connecting portion 16 can be alleviated. Moreover, even if an impact is applied to the band clamp 10 after the linear members are fastened, stress concentration on the connection position 50 of the connection part 16 can be reduced.

The bifurcated portion 44 extends from the side surfaces 32 a of the pair of side wall portions 32 toward the band portion 12 , joins in the middle, and connects to the band portion 12 . A position 50 where the bifurcated portion 44 is connected to the side wall portion 32 is connected to a position remote from the mounting portion 40 . That is, the connection position 50 of the connection part 16 is offset downward from the upper end of the lock part 14 on the side surface 32a. The connecting position 50 of the connecting part 16 is located closer to the insertion part 34 than the placing part 40, closer to the fixing part 18 than the placing part 40, and closer to the bottom 35 of the locking part 14 than the placing part 40. Located in A gap is formed between the connecting portion 16 and the side surface 32a of the side wall portion 32. Thereby, the connection position 50, which serves as a rotational fulcrum of the band portion 12, can be moved away from the linear member, and stress concentration on the connection position 50 can be alleviated.

The connecting portion 16 is connected to a position 50 on the side surface 32a that is closer to the outlet 34b than the inlet 34a. The connection position 50 of the connection part 16 is formed closer to the outlet 34b than the center of the side surface 32a in the penetrating direction of the insertion part 34. Since the linear member is likely to be placed on the center side of the side wall portion 32, the connecting position 50, which serves as a rotational fulcrum of the band portion 12, can be moved away from the linear member, and stress concentration on the connecting position 50 can be alleviated. Moreover, it becomes possible to wrap a linear member with a large diameter, and the range of applicable diameters of the band clamp 10 can be widened.

The bifurcated portion 44 has a rising portion 52 and a bent portion 54 . As shown in FIG. 3(b), the rising portion 52 rises from the side surface 32a toward the mounting portion 40 when viewed in the direction perpendicular to the surface of the side wall portion 32. The rising portion 52 extends along the vertical direction. The bent portion 54 is bent from the rising portion 52 toward the outlet 34b when viewed in a direction perpendicular to the plane of the side wall portion 32, and is inclined with respect to the rising portion 52. The bent portion 54 is located closer to the band portion 12 than the placing portion 40 and extends upward from the upper end of the lock portion 14. By inclining the bent portion 54 toward the outlet 34b, when the band portion 12 winds a linear member, the rotation angle of the connecting portion 16 seen in the direction perpendicular to the side wall portion 32 can be reduced, and the rotation angle to the connecting position 50 can be reduced. Stress concentration can be alleviated.

As shown in FIG. 3A, the bifurcated portion 44 protrudes from the side surface 32a in the width direction and then stands up, and has a gap spaced from the side surface 32a by a distance L. Note that the width direction is the same as the direction perpendicular to the plane of the side wall portion 32. The interval L may be approximately the same as the width of the bifurcated portion 44, and may be half or more of the width of the bifurcated portion 44. The bifurcated portion 44 is provided so as not to protrude further outward than the flange portion 26 in the radial direction. The connecting position 50 of the connecting part 16 is provided upwardly apart from the flange part 26 of the fixing part 18.

The convex portion 46 is formed to protrude from the bifurcated portion 44, and extends from below the placing portion 40 to the side closer to the band portion 12 than the placing portion 40, as shown in FIG. 3(a). The convex portion 46 is used for positioning the linear member, and prevents the linear member wound around the band portion 12 from shifting.

FIG. 4 is a side view of the band clamp 10 holding the linear member 60. The band clamp 10 can hold multiple types of wire members with different wire diameters, and the wire member 60 shown in FIG. 4 is one of the wire members with the smallest wire diameter among the wire members expected to be used. It is. The band clamp 10 can also hold a linear member having a diameter approximately 2.5 times that of the linear member 60 shown in FIG.

The mounting section 40 is located between the linear member 60 and the insertion section 34 with the linear member 60 wound thereon, and the linear member 60 wound around the band section 12 is placed thereon. The convex portion 46 abuts against the linear member 60 to position the linear member 60. Even when holding a small-diameter linear member 60, since the connecting position 50 of the connecting part 16 is arranged sufficiently far from the point of action of the linear member 60, the degree of twisting around the connecting position 50 of the connecting part 16 can be suppressed. , stress concentration can be alleviated.

The connecting portion 16 is configured so as not to hit the mounting portion 40 when the linear member 60 is wound around the connecting portion 16 . In other words, even if the linear member 60 with the minimum applicable diameter is fastened, the connecting portion 16 does not interfere with the upper end of the locking portion 14 . Thereby, stress concentration can be suppressed from occurring in the portion where the connecting portion 16 hits the mounting portion 40.

The present invention is not limited to the embodiments described above, and it is possible to make various design changes and other modifications to each embodiment based on the knowledge of those skilled in the art. Examples described herein may also be included within the scope of the present invention.

10 band clamp, 12 band portion, 14 lock portion, 16 connecting portion, 18 fixing portion, 20 engaging portion, 22 band edge, 24 protrusion, 26 flange portion, 28 shaft portion, 30 elastic leg portion, 32 side wall portion , 32a side surface, 34 insertion part, 34a inlet, 34b outlet, 35 bottom part, 36 pedestal part, 38 engaged part, 40 placing part, 42 central rib, 44 bifurcated part, 46 convex part, 52 rising part, 54 bending Section 60 Linear member.

Claims (5)

a band portion wrapped around the linear member;
a lock part that fastens the band part in a wrapped state;
a connecting part that connects the band part and the lock part,
The band portion has an engaging portion,
The lock part is
a pair of side walls;
an insertion part provided between the pair of side wall parts, through which the band part can be inserted, and which forms an entrance and an exit of the band part;
an engaged part formed in the insertion part and engaged with the engaging part,
The band clamp is characterized in that the connecting portion has a shape that is bifurcated from the band portion side, and is connected only to the side surfaces of the pair of side wall portions, respectively. The locking part has a placing part that is located between the linear member and the insertion part in a state where the linear member is wound, and on which the linear member wound by the band part is placed.
The band clamp according to claim 1, wherein the connecting portion is connected at a position remote from the mounting portion. The band clamp according to claim 1 or 2, wherein the connecting portion is connected at a position closer to the outlet than the inlet on the side surface. The connecting portion is
a rising portion rising from the side surface toward the mounting portion when viewed in a direction perpendicular to the surface of the side wall portion;
a bent portion bent from the rising portion toward the outlet side when viewed in a direction perpendicular to the plane of the side wall portion;
The band clamp according to claim 2, wherein the bent portion is located closer to the band portion than the mounting portion. 5. The band clamp according to claim 2, wherein the connecting portion is configured so as not to hit the mounting portion when the linear member is wound around the connecting portion.

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