WO2020137943A1

WO2020137943A1 - Band clamp

Info

Publication number: WO2020137943A1
Application number: PCT/JP2019/050290
Authority: WO
Inventors: 光清田
Original assignee: 株式会社パイオラックス
Priority date: 2018-12-28
Filing date: 2019-12-23
Publication date: 2020-07-02
Also published as: JPWO2020137943A1; CN113260794B; CN113260794A; JP7052082B2

Abstract

Provided is a band clamp that can reduce an insertion force of a band part into an insertion passage of a lock part. This band clamp 10 has a lock part 20 and a band part 40, the lock part 20 has an insertion passage 25 and a locking piece 30 having locking claws 31 and 32, and the band part 40 has a plurality of locking teeth. When the length, from a hem part 53 to a top part 54, of a foremost locking tooth 51 located on a foremost side of the band part is A, and the length, from the hem part 53 to the top part 54, of a locking tooth 49 adjacent to the foremost locking tooth is B, A is larger than B, and the foremost locking tooth 51 is provided between the hem part 53 and the top part 54 so as to protrude with an intermittent slope.

Description

Band clamp

The present invention relates to a band clamp that winds around a member to be bound such as a cable or an electric wire and binds them together.

For example, a plurality of cables, electric wires, pipes, tubes and the like (members to be bound) are arranged inside and outside the vehicle, but these may be bound by a band clamp (also called a binding band). Many.

As such, Patent Document 1 below describes a binding band as shown in FIG. 10 attached to the specification of the present application. The binding band 1 includes a band portion 2 having a plurality of locking teeth 3 formed on one surface, and a lock portion 5 formed at a base end of the band portion 2. The lock portion 5 has the band portion 2 inserted therethrough. And a flexible locking piece 7 whose one end is connected to the inside of the insertion passage via a connecting portion 7a. A pair of

locking claws

8 and 9 that lock with the locking teeth 3 of the band portion 2 are formed on the other end side of the locking piece 7.

Then, when the band portion 2 is inserted into the insertion passage 6 of the lock portion 5 from the distal end side, first, the locking teeth 3 located on the most distal side of the band portion 2 are connected to the connecting portion of the locking piece 7. The locking teeth 3 pass over the locking claws 8 while abutting the locking claws 8 near the 7a and pressing and locking the locking pieces 7 to deform the locking teeth 3 to the locking claws 8. Lock. When the band portion 2 is further inserted, the plurality of locking teeth 3 on the band base end side of the most advanced locking teeth 3 successively pass over the

locking pawls

8 and 9 of the locking piece 7 to form the same locking pawl. The members to be bound are clamped and held by being intermittently locked to 8 and 9.

JP, 2016-31116, A

By the way, in the binding band of the said patent document 1, as shown in FIG. 10 attached to this specification, the top part 3a of the locking tooth 3 located in the most distal side of the band part 2 is the hem part of the locking claw 8. 8a is pressed to bend the locking piece 7. However, since the distance L between the fulcrum (the connecting portion 7a of the locking piece 7) when the locking piece 7 is bent and the point of action (the hem 8a) to which the pressing force of the locking claw 8 is applied is short, It was difficult to bend the locking piece 7, and it was necessary to apply a large insertion force to the band portion 2.

Therefore, an object of the present invention is to provide a band clamp that can reduce the insertion force of the band part with respect to the insertion passage of the lock part.

To achieve the above object, a band clamp of the present invention includes a lock portion and a band portion extending from the lock portion, and the lock portion includes an insertion passage through which the band portion is inserted, and the insertion portion. A locking piece formed flexibly inside the passage, the band portion has a plurality of locking teeth formed to project from at least one surface, and the locking piece has the band portion When it is inserted into the insertion passage, it has a locking claw that locks to the locking tooth, and each locking tooth is located at the tip end side in the extending direction of the band part and has a skirt with a minimum protrusion amount. A top portion having a maximum amount of protrusion located on the base end side in the extension direction of the band portion, and is located at the most distal end side in the extension direction of the band portion among the plurality of locking teeth. The length of the most distal locking tooth from the hem portion to the top portion along the extending direction of the band portion is A, and the most distal locking tooth among the plurality of locking teeth is When the length of the locking teeth adjacent to the base end side in the extending direction of the band portion from the hem portion to the apex along the extending direction of the band portion is B, Is formed so as to be larger than the B, and the most distal locking tooth is provided so as to form an intermittent or continuous slope between the skirt portion and the top portion. It is characterized by being

According to the present invention, since the most distal locking tooth provided on the band portion is provided so as to form an intermittent or continuous slope between the hem portion and the top portion, After arranging a bound member such as a cable or electric wire between the band and the band, insert the tip of the band into the insertion passage of the lock, and engage the locking claw of the locking piece with the locking tooth of the band. When the locking piece is locked, the cutting edge locking tooth presses the locking claw to bend the locking piece, so the fulcrum of the bending deformation of the locking piece and the cutting edge engagement of the locking claw. To ensure that the distance from the point of action to which the pressing force from the teeth is applied is as long as possible to make it easier to bend the locking piece, and insert the band part into the insertion path of the lock part with a low insertion force. You can

It is a perspective view showing one embodiment of a band clamp concerning the present invention. It is an expanded sectional view of the same band clamp. The band part which comprises the same band clamp is shown, (a) is the top view, (b) is sectional drawing. In the same band clamp, the state at the time of inserting a band part in the insertion passage of a lock part is shown, (a) is an expanded sectional view showing the 1st process, (b) is an expanded sectional view showing the 2nd process. Is. In the same band clamp, the state at the time of inserting a band part in the insertion passage of a lock part is shown, (a) is an expanded sectional view showing the 3rd process, (b) is an expanded sectional view showing the 4th process. Is. In the same band clamp, the state at the time of inserting a band part in the insertion passage of a lock part is shown, and it is an expanded sectional view showing the 5th process. It is an enlarged front view of the same band clamp. It is a cross-sectional explanatory view of a state in which the members to be bound are bound together using the same band clamp. It is sectional drawing which shows the other shape of the band part which comprises the same band clamp. It is a principal part expanded sectional view of the conventional binding band.

An embodiment of the band clamp according to the present invention will be described below with reference to the drawings.

As shown in FIG. 8, the band clamp 10 is for binding a plurality of binding members H such as a plurality of electric wires, cables, tubes, pipes, etc., which are arranged inside a vehicle. As shown in FIGS. 1 and 2, the band clamp 10 has a lock portion 20 and a band portion 40 extending from the lock portion 20. Further, as shown in FIG. 1, a plurality of

locking teeth

49, 51 are formed to project from one surface 45 of the band portion 40.

First, the lock section 20 will be described in detail. As shown in FIGS. 1 and 2, the lock portion 20 of this embodiment includes a bottom wall 21, a pair of

side walls

22 and 22 provided upright from peripheral portions on both sides in the width direction of the bottom wall 21, and a pair of these. And a ceiling wall 23 that connects the leading end portions of the

side walls

22, 22 in the standing direction, and has a substantially rectangular frame shape. Further, inside the lock portion 20, an insertion passage 25 through which the band portion 40 is inserted is formed by being surrounded by a plurality of wall portions. An opening on one end side of the insertion passage 25 forms a band portion inlet 25a into which the band portion 40 is inserted, and an opening on the other end side forms a band portion outlet 25b into which the band portion 40 is inserted.

Further, as shown in FIG. 7, a pair of

protruding support portions

27, 27 is provided inside the insertion passage 25. In this embodiment, a pair of

projecting support portions

27, 27 extending along the insertion direction of the band portion 40 are provided at inner corners of the bottom wall 21 and the pair of

side walls

22, 22 that define the insertion passage 25. It is projected.

A locking piece 30 is formed flexibly inside the insertion passage 25, and the locking piece 30 engages with the

locking teeth

49, 51 when the band portion 40 is inserted into the insertion passage 25. It has locking

claws

31 and 32 for stopping. The locking piece 30 in this embodiment is formed so as to be flexible between the pair of projecting

support portions

27, 27 with a predetermined gap (see FIG. 7), and as shown in FIG. The base end 30a is connected to the bottom wall 21, and the tip 30b extends toward the band outlet 25b side. The locking piece 30 is configured to be flexibly deformed with a connecting portion between the base end 30a and the bottom wall 21 of the lock portion 20 as a flexion fulcrum P1 (see FIG. 4A). Further, locking

claws

31 and 32 that lock with the

locking teeth

49 and 51 of the band portion 40 are provided so as to project from the surface of the locking piece 30 that faces the ceiling wall 23. In this embodiment, the locking claw 31 is arranged on the proximal end 30a side of the locking piece 30, and the locking claw 32 is arranged on the distal end 30b side of the locking piece 30.

Further,

tapered surfaces

31a and 32a are formed on the surfaces of the

locking claws

31 and 32 on the ceiling wall 23 side so that the protruding height gradually increases toward the band outlet 25b side. Further, the portions of the

locking claws

31 and 32 that have the largest amount of protrusion from the surface of the locking piece 30 on the ceiling wall side form the

tops

31b and 32b. Further, the portions of the

respective locking claws

31 and 32 where the amount of protrusion from the surface of the locking piece 30 on the ceiling wall side is the

hem portions

31c and 32c. Further, locking

portions

31d, 32d for locking the

locking teeth

49, 51 of the band portion 40 are provided on the locking piece tip side of the

locking claws

31, 32 with respect to the

top portions

31b, 32b. (See FIGS. 2 and 5(a)). Note that the number of locking claws provided on the locking piece may be one instead of two or three or more.

Further, as shown in FIG. 8, a locking leg 35 for connecting the band clamp 10 to a mounted member 100 such as a vehicle panel or a vehicle body frame is continuously provided on the lock portion 20. Referring also to FIG. 7, the locking leg 35 of this embodiment has a flange portion 36 that spreads obliquely outward from the outer periphery of the bottom wall 21 toward the side opposite to the ceiling wall 23 in an umbrella shape. A column portion 37 extending from the back side of the bottom wall 21 and a pair of flexible

elastic locking pieces

38, 38 extending obliquely outward from the tip of the column portion 37 in the extending direction toward the flange portion 36. It consists of and. Then, when the locking leg 35 is inserted from the front side of the mounting hole 105 of the mounted member 100, the flange portion 36 abuts on the front side peripheral edge of the mounting hole 105, and the pair of elastic locking pieces 38 on the rear side peripheral edge of the mounting hole 105. , 38 are locked, and the band clamp 10 can be mounted in the mounting hole 105 of the mounted member 100 via the locking leg 35 (see FIG. 8 ). The locking leg is not limited to the above structure, and the locking leg may not be provided.

Next, the band section 40 will be described in detail. As shown in FIG. 1 and FIG. 2, the band portion 40 of this embodiment has its base end 41 connected to the ceiling wall 23 of the lock portion 20 in the vicinity of the band outlet 25b. It extends in a strip shape with a predetermined length. Both side portions in the width direction of the tip end 43 in the extending direction of the band portion 40 (meaning a direction orthogonal to the extending direction of the band portion 40 and the protruding direction of the locking

teeth

49, 51. The same applies in the following description). Is gradually narrowed and is easily inserted into the band portion inlet 25a of the insertion passage 25 of the lock portion 20.

Also, from one surface 45 of the band portion 40 (the surface facing the locking

claws

31 and 32 of the locking piece 30 when the band portion 40 is inserted into the insertion passage 25 of the lock portion 20), a plurality of locking teeth 49 are provided. , 51 are protruding. In this embodiment, as shown in FIG. 3( a ), the locking teeth do not protrude in a predetermined range from the distal end of the band portion 40 in the extending direction to the base end 41 side. At the position closest to the projecting portion, the most distal locking tooth 51, which is located at the most distal side in the extending direction of the band portion 40, projects, and the extending direction of the band portion 40 is greater than the most distal locking tooth 51. A plurality of locking teeth 49 are provided at predetermined intervals toward the base end 41 side of the.

In addition, as shown in FIG. 3( b ), the “locking teeth” in the present invention mean a predetermined one surface 45 of the band portion 40, and another adjacent to the one surface 45 in the extending direction of the band portion 40. It means one that protrudes from the one surface 45 of the above, and does not include, for example, two sets of locking teeth or three sets of locking teeth.

Further, as shown in FIG. 3B, each of the locking

teeth

49, 51 has a minimum protrusion amount (a protrusion amount from one surface 45 of the band portion 40 on the tip end 43 side in the extending direction of the band portion 40). The smallest amount of hem 53 and the amount of protrusion from one surface 45 of the band portion 40 to the base end 41 side of the band portion 40 in the extending direction of the hem portion 53 (from the one surface 45 of the band portion 40). (The protrusion amount is the largest). Further, each locking

tooth

49, 51 is formed with a locking portion 55, which is substantially perpendicular to the extending direction of the band portion 40, closer to the base end 41 side of the band portion 40 than the top portion 54. ..

Further, as shown in FIGS. 3A and 3B, a pair of ribs extending from the one side surface 45 of the band portion 40 along the longitudinal direction of the band portion 40 on both sides in the width direction of the band portion 40. 47, 47 project at a predetermined height. The rib 47 in this embodiment projects at the same height as the locking

teeth

49, 51. Further, these

ribs

47, 47 abut against the pair of projecting support portions 27, 27 (see FIG. 7) when the band portion 40 is inserted into the insertion passage 25 of the lock portion 20, so that the band portion 40. The one surface 45 of 40 supports the lock part 20 so as to be separated from the inner surface of the bottom wall 21. Further, as shown in FIG. 3A, the width direction both sides of the plurality of locking

teeth

49, 51 are arranged between the pair of

ribs

47, 47 to connect the pair of

ribs

47, 47. ..

Then, in the band clamp 10 of this embodiment, as shown in FIG. 3B, the most distal locking teeth 51 project between the hem portion 53 and the top portion 54 with an intermittent slope. Is provided. Further, the most distal locking teeth 51 are formed on the first slope 59 located on the tip end 43 side in the extension direction of the band part 40 and on the base end 41 side in the extension direction of the band part 40 with respect to the first slope 59. Has a second inclined surface 61 located at, and a shelf surface 63 provided between the first inclined surface 59 and the second inclined surface 61, and the extending direction of the band portion 40 of the most distal locking tooth 51. On the tip end 43 side and the base end 41 side in the extending direction of the band portion 40, a stepwise projecting portion is provided via a first slope 59 and a second slope 61. That is, in the most distal locking tooth 51 in this embodiment, the first inclined surface 59 and the second inclined surface 61, which is separated from the first inclined surface 59 by a predetermined length on the base end side of the band portion, extend along the extending direction of the band portion 40. Are provided intermittently, and project from one surface 45 of the band portion 40 via these

inclined surfaces

59 and 61. The amount of protrusion of the shelf surface 63 provided between the first slope 59 and the second slope 61 from the one surface 45 of the band portion 40 is constant.

The “sloping surface” of the most advanced locking tooth in the present invention means that the tip end side in the extending direction of the band portion 40 is low and the base end side in the extending direction of the band portion 40 is high with respect to the one surface 45 of the band portion 40. Such a slope does not include a slope that is high on the tip end side in the extending direction of the band portion 40 and low on the base end side in the extending direction of the band portion 40. Further, in the case of this embodiment, the “stepped portion” of the most distal locking tooth is a stepped portion formed from the tip side of the first inclined surface 59 and the shelf surface 63 connected to the first inclined surface 59. And a step-like portion including the second slope 61 and a top portion 54 continuous with the second slope 61, and two step-like portions.

More specifically, in this embodiment, as shown in FIG. 3B, the first inclined surface 59 is directed from the hem portion 53 of the most distal locking tooth 51 toward the base end side of the band portion 40. Is provided so as to gradually project higher, and the shelf surface 63 extends from the apex (the highest portion) of the first inclined surface 59 toward the base end side of the band portion at a constant height. Further, from the base end of the shelf surface 63 (the end on the base end side of the band portion 40), the second inclined surface 61 is provided so as to be inclined so as to gradually project toward the base end side of the band portion 40. ing. Further, the top 54 of the most distal locking tooth 51 has a constant amount of protrusion from one side 45 of the band 40 from the apex (the highest portion) of the second slope 61 toward the base end side of the band. Has been formed.

The amount of protrusion of the shelf surface 63 from the one surface 45 of the band portion 40 is 1/4 to 1 when the amount of protrusion of the top 54 of the most distal locking tooth 51 from the one surface 45 of the band portion 40 is 1. It is preferably 3/4, and more preferably 1/3 to 2/3. Further, the shelf surface may be an inclined surface that is inclined at a predetermined angle with respect to the one surface 45 of the band portion 40, even if the amount of protrusion from the one surface 45 of the band portion 40 is not constant.

Further, the above-mentioned most advanced locking tooth 51 has a portion (here, the first slope 59) formed on the tip end 43 side of the band portion 40 so as to be lower than the top 54 of the most distal locking tooth 51. As a result, as shown in FIG. 4A, when the band portion 40 is inserted into the insertion passage 25 of the lock portion 20 from the tip end 43 side, the first slope 59 is provided on the hem portion 31c of the locking claw 31. Instead of abutting, the taper surface 31a of the locking claw 31 is first brought into contact with a predetermined position (position away from the hem portion 31c) to press the locking claw 31, and the locking piece 30 of the band portion 40 is pressed. It is configured to be flexibly deformed in a direction away from the one surface 45 side. At this time, as shown in FIG. 4A, the first inclined surface 59 of the most distal locking tooth 51 comes into surface contact with the tapered surface 31a of the locking claw 31, and a pressing force is applied. However, the portion of the tapered surface 31a of the locking claw 31 that is closest to the base end 30a of the locking piece 30 is the action point P2 to which the pressing force from the most distal locking tooth 51 is applied.

Further, when the band portion 40 is further inserted from the state shown in FIG. 4A, as shown in FIG. 4B, the locking claw 31 rides on the shelf surface 63, and the taper of the locking claw 31. When the second slope 61 of the most distal locking tooth 51 comes into contact with the surface 31a and then the top 31b of the locking claw 31 gets over the top 54 of the most distal locking tooth 51, the locking piece 30 elastically returns. Then, as shown in FIG. 5A, the locking portion 55 of the tip locking tooth 51 and the locking portion 31d of the locking claw 31 are locked to each other. When the band portion 40 is further inserted from the state shown in FIG. 5A, the second inclined surface 61 of the most distal locking tooth 51 is at a position away from the base end 30a with respect to the locking claw 31. The locking piece 30 is brought into contact with a predetermined position of the tapered surface 32a of the locking claw 32 to bend and deform the locking piece 30 in a direction away from the one surface 45 side of the band portion 40.

Further, as shown in FIG. 3B, along the extending direction of the band portion 40 from the hem portion 53 to the top portion 54 (the end portion on the base end side of the band portion 40) of the most distal locking tooth 51. The length of the band portion 40 from the hem portion 53 to the top portion 54 of the locking tooth 49 adjacent to the distal end 41 in the extending direction of the band portion 40 with respect to the most distal locking tooth 51. When the length along the extension direction of B is B, A is formed to be larger than B. By forming in this manner, it becomes easy to provide a shape of the most distal locking tooth 51 that protrudes with an intermittent or continuous slope (if A<B, it is difficult to form a slope), and When the band is inserted into the insertion passage, the locking piece is kept in a bent state for a relatively long period of time, and the locking claw provided on the locking piece rides over the top of the locking tooth. Make it easier (when A<B, the locking piece immediately elastically returns when the band is inserted into the insertion path, and the locking claws do not easily get over the tops of the locking teeth).

Further, in a state in which the top portion 54 of the most distal locking tooth 51 has passed over the top portion 32b of the locking claw 32, as shown in FIG. 5B, the inclined surface of the locking tooth 49 located on the tip end side of the band portion. 65 is in contact with the tapered surface 32 a of the locking claw 32, but the inclined surface 65 of another locking tooth 49 adjacent to the locking tooth 49 on the base end side of the band portion is the locking claw 31. The taper surface 31a is arranged with a predetermined gap, and the inclined surface 65 of the locking tooth 49, which is always located on the tip side of the band portion, contacts the tapered surface 32a of the locking claw 32. The locking piece 30 is flexibly deformed. That is, in this embodiment, among the plurality of locking teeth 49 located on the base end 41 side of the band portion 40 rather than the most distal locking tooth 51, the locking tooth 49 closest to the tip end side of the band portion 40. Of the plurality of locking

claws

31 and 32 provided on the locking piece 30, the locking claw 32, which is distant from the bending fulcrum P1 of the locking piece 30, contacts the locking claw 32 when the locking portion 20 is inserted into the insertion path 25. The locking piece 30 is flexibly deformed.

Then, as shown in FIG. 3B, the length of the shelf surface 63 of the most distal locking tooth 51 along the extending direction of the band portion 40 is set to C, and the top 54 of the most distal locking tooth 51 is defined. Assuming that the length of the band portion 40 along the extending direction is D, the C is formed to be larger than the D.

In addition, the most distal locking tooth 51 of this embodiment has a shape that protrudes by forming two

inclined surfaces

59 and 61 that are intermittently provided between the skirt portion 53 and the top portion 54 with the shelf surface 63 interposed therebetween. However, as the most advanced locking tooth in the present invention, for example, between the skirt portion and the top portion, the shape is formed by intermittently forming three or more slopes or protruding at a certain height. A plurality of shelves may be formed.

In addition, in this embodiment, as shown in FIG. 3B, the top portions 54 of the locking

teeth

49 and 51 are formed so that the amount of protrusion from the one surface 45 of the band portion 40 is constant. As shown by the chain double-dashed line in the partially enlarged view of FIG. 3B, the apexes 54 of the locking

teeth

49 and 51 are formed as a mountain-shaped point, and the tip 43 side in the extending direction of the band portion 40 from the apexes 54. An inclined portion 54a may be formed so as to incline toward. As shown by the chain double-dashed line in the partially enlarged view of FIG. 3B, an inclined portion 54a that inclines from the top portion 54 of the most distal locking tooth 51 toward the tip end 43 side in the extending direction of the band portion 40 is formed. When it is formed, the length of the inclined portion 54a along the extending direction of the band portion 40 is D, and the C is formed to be larger than the D. Furthermore, the locking portion 55 of each locking

tooth

49, 51 may be inclined at a predetermined angle with respect to the extending direction of the band portion 40 instead of being substantially perpendicular to the extending direction of the band portion 40. ..

Further, as shown in FIG. 9, the most distal locking tooth 51 may have a structure in which a protruding portion forms a continuous slope between the hem portion 53 and the top portion 54. In this case, the most distal locking tooth 51 has a continuous inclined surface 67 that continuously protrudes from the hem portion 53 so as to gradually increase toward the base end side of the band portion 40. In addition, a plurality of continuous slopes as described above may be provided on the most distal locking tooth (for example, continuous slopes having different inclination angles with respect to one surface 45 of the band portion 40 may be formed in the extending direction of the band portion 40). It may be shaped like a series of a plurality of).

Further, the plurality of locking teeth 49 are provided so that an inclined surface 65 is inclined from the skirt portion 53 toward the base end side of the band portion 40 so as to gradually project higher, and the inclined surface 65 From the apex, a top portion 54 having a constant amount of protrusion from one surface 45 of the band portion 40 is formed.

Next, a method of using the band clamp 10 having the above-described configuration and its effects will be described.

First, the band portion 40 is curved so that the plurality of locking

teeth

49 and 51 are outward, and wound around the bundled member H such as an electric wire or a cable. Then, the one surface 45 side of the band portion 40 is directed toward the bottom wall 21 side of the lock portion 20, and is inserted from the tip end 43 side of the band portion 40 into the band portion inlet 25a of the insertion passage 25 of the lock portion 20. At this time, the pair of

ribs

47, 47 of the band part 40 are supported by the pair of projecting

support parts

27, 27 of the lock part 20, and the band part 40 is inserted while being guided.

Then, as shown in FIG. 4A, the first inclined surface 59 of the most distal locking tooth 51 does not come into contact with the hem portion 31 c of the locking claw 31, and the tapered surface 31 a of the locking claw 31 does not contact. The contact piece 30 comes into contact with and presses at a predetermined position away from the hem portion 31c, and the locking piece 30 flexibly deforms in a direction away from the one surface 45 of the band portion 40. After that, the top 31b of the locking claw 31 comes into contact with the shelf surface 63 and slides on the shelf surface 63, and as shown in FIG. 4B, the second slope 61 of the most distal locking tooth 51 becomes It contacts the tapered surface 31 a of the locking claw 31. Then, when the top 31b of the locking claw 31 gets over the top 54 of the most distal locking tooth 51, the locking piece 30 elastically returns, and as shown in FIG. The locking part 55 and the locking part 31d of the locking claw 31 are locked to each other, and are temporarily held so that the band part 40 does not come off from the lock part 20.

After that, when the band portion 40 is further inserted, the second inclined surface 61 of the most distal locking tooth 51 comes into contact with and presses the predetermined position of the tapered surface 32a of the locking claw 32 to bend and deform the locking piece 30. Then, when the top portion 32b of the locking claw 32 crosses over the top portion 54 of the most distal locking tooth 51, the locking piece 30 elastically returns, and the locking portion 55 of the most distal locking tooth 51 and the locking claw 32 are separated. The locking portion 32d is locked with each other. When the band portion 40 is further inserted, as shown in FIG. 5B, the inclined surface 65 of the locking tooth 49 adjacent to the most distal locking tooth 51 contacts the tapered surface 32 a of the locking claw 32. When the top portion 32b of the locking claw 32 gets over the top portion 54 of the locking tooth 49, the locking piece 30 elastically returns, and as shown in FIG. The engaging portion 55 of the stop tooth 49 and the engaging portion 32d of the engaging claw 32 are engaged with each other.

Thereafter, when the band portion 40 is inserted, the inclined surfaces 65 of the locking teeth 49 located on the tip end side of the band portion sequentially come into contact with the taper surface 32a of the locking claw 32 located on the tip end side of the locking piece. , The locking piece 30 is flexibly deformed, and the locking portion 55 of the locking tooth 49 and the locking portion 32d of the locking claw 32 are intermittently locked (see FIG. 6), and the band portion 40 is temporarily The holding state is maintained. Thereafter, the band portion 40 is pulled by a predetermined tool or human power until the outer periphery of the bound member H is fastened, so that the bound member H can be fastened and held by the band portion 40 as shown in FIG.

As described above, in the band clamp 10, the length A along the extending direction of the band portion 40 from the hem portion 53 to the top portion 54 of the most distal locking tooth 51 is the most distal locking tooth 51. On the other hand, the locking tooth 49 adjacent to the base end 41 side in the extension direction of the band portion 40 is larger than the length B along the extension direction of the band portion 40 from the hem portion 53 to the top portion 54. The leading edge locking teeth 51 provided on the band portion 40 are formed so as to project from the skirt portion 53 to the top portion 54 with an intermittent slope. Therefore, after the member H to be bound is arranged between the lock portion 20 and the band portion 40, the tip end 43 of the band portion 40 is inserted into the insertion passage 25 of the lock portion 20, and the locking claw 31 of the locking piece 30 is inserted. When the locking

teeth

49, 51 of the band portion 40 are locked to the

hooks

32, 32, the distalmost locking teeth 51 press the locking claws 31 to bend the locking pieces 30. .. As a result, the distance L between the fulcrum P1 of the locking piece 30 at the time of flexural deformation and the action point P2 of the locking claw 31 to which the pressing force from the most distal locking tooth 51 is applied (FIG. 4A). (Refer to FIG. 4) can be secured as long as possible to facilitate bending of the locking piece 30, and the band portion 40 can be inserted into the insertion passage 25 of the lock portion 20 with a low insertion force. Particularly, when the band portion 40 is inserted into the insertion passage 25 of the lock portion 20 and the leading edge locking tooth 51 is locked to the locking claw 31 of the locking piece 30, the insertion force of the band portion 40 is reduced. can do.

Further, when the band 40 is further inserted from the state in which the most distal locking tooth 51 presses the locking claw 31, the locking piece 30 is already in a bent state (see FIG. 4 ( (See b)), the locking claw 31 can easily get over the top 54 of the most distal locking tooth 51, and the insertion force of the band 40 can be reduced.

By the way, in this embodiment, as shown in FIG. 5B, among the plurality of locking teeth 49, the locking tooth 49 closest to the tip end side of the band portion 40 is inserted into the insertion passage 25 of the lock portion 20. At the time of insertion of the locking piece 30, the locking piece 30 is flexed and deformed by contacting the locking claw 32 that is away from the bending fulcrum P1 of the locking piece 30. Therefore, it is possible to secure a long distance L between the fulcrum P1 of the locking piece 30 at the time of flexural deformation and the action point P3 of the locking claw 32 to which the pressing force is applied from the most distal locking tooth 51. Therefore, the locking piece 30 can be easily bent, and the insertion force of the band portion 40 can be reduced even after the most distal locking teeth 51 have passed.

It should be noted that the above effect can be similarly obtained even when the most distal locking tooth 51 has the continuous slope 67 between the skirt portion 53 and the top portion 54 as shown in FIG. 9. ..

Further, in this embodiment, the most distal locking teeth 51 are the first inclined surface 59 located on the tip end 43 side in the extending direction of the band portion 40 and the extending direction of the band portion 40 with respect to the first inclined surface 59. Has a second sloped surface 61 located on the base end 41 side and a shelf surface 63 provided between the first sloped surface 59 and the second sloped surface 61, and the band portion of the most distal locking tooth 51. On the tip end 43 side in the extending direction of 40 and the base end 41 side in the extending direction of the band portion 40, a stepwise protruding portion is provided via the first inclined surface 59 and the second inclined surface 61. Therefore, when the band portion 40 is inserted into the insertion passage 25 of the lock portion 20, as shown in FIG. 4B, the locking claw 31 of the locking piece 30 is changed to the first inclined surface 59 of the most distal locking tooth 51. And the second slope 61 (here, the top 31b of the locking claw 31 is locked to the shelf surface 63), and the band 40 is temporarily inserted in the insertion passage 25 of the lock 20. Can be held. That is, since the locking piece 30 pressed by the most distal locking tooth 51 tries to elastically return to the initial shape (see FIG. 4A), the locking claw 31 is locked to the shelf surface 63. Has become.

Further, in this embodiment, as shown in FIG. 4B, the amount of protrusion of the shelf surface 63 provided between the first slope 59 and the second slope 61 from the one surface 45 of the band portion 40 is constant. Therefore, the band portion 40 can be temporarily held in a stable manner.

Further, in this embodiment, as shown in FIG. 3B, the length C of the shelf surface 63 along the extending direction of the band portion 40 is the length C of the band portion 40 of the most distal locking tooth 51. The apex portion 54 having a constant amount of protrusion from the one surface 45, or the inclined portion 54a inclined from the apex portion 54 of the most distal locking tooth 51 toward the distal end 43 side in the extending direction of the band portion 40 (see FIG. The length C of the shelf surface 63 is ensured to be long because it is formed so as to be larger than the length D along the extending direction of the band portion 40 (see the chain double-dashed line in the partial enlarged view of b)). Therefore, the band portion 40 can be temporarily held more stably.

Further, in this embodiment, a pair of projecting

support portions

27, 27 is provided inside the insertion passage 25 of the lock portion 20 (see FIG. 7), and is orthogonal to the extending direction of the band portion 40. A pair of

ribs

47, 47 supported by the pair of projecting

support portions

27, 27 are provided on both side portions in the width direction. The structure is such that the stop teeth 51 are arranged (see FIG. 3A). Therefore, when the band portion 40 is inserted into the insertion passage 25 of the lock portion 20, the pair of

ribs

47, 47 is supported by the pair of projecting

support portions

27, 27, and the band portion 40 is prevented from rattling and the band portion 40 is suppressed. 40 can be aligned in the direction away from the locking piece 30, and the inclined surface of the most advanced locking tooth 51 can be easily brought into contact with the middle portion of the locking claw 31 of the locking piece 30 in the protruding direction. (As shown in FIGS. 4A and 4B, the first inclined surface 59 and the second inclined surface 61 of the most distal locking tooth 51 can be easily brought into contact with the tapered surface 31a of the locking claw 31.) Therefore, it is possible to more appropriately reduce the insertion force of the band portion 40.

The present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the gist of the present invention, and such embodiments are also included in the scope of the present invention. ..

10 band clamp 20 lock part 25 insertion passage 30

locking pieces

31, 32 locking claw 35 locking leg 40 band part 41 base end 43 tip 45 one

side

47, 47 rib 49 locking tooth 51 most advanced locking tooth 53 hem part 54 Top 54a Inclined Part 59 First Slope 61 Second Slope 63 Shelf

Claims

A lock part and a band part extending from the lock part,
The lock portion has an insertion passage through which the band portion is inserted, and a locking piece that is formed flexibly inside the insertion passage,
The band portion has a plurality of locking teeth formed to project from at least one surface,
The locking piece has a locking claw that locks with the locking tooth when the band portion is inserted into the insertion passage,
Each locking tooth has a skirt having the smallest amount of protrusion located on the tip side in the extending direction of the band part and a top having the largest amount of protrusion located on the base end side in the extending direction of the band part. Have,
Of the plurality of locking teeth, the length of the most distal locking tooth located on the most distal side in the extending direction of the band portion from the hem portion to the top portion along the extending direction of the band portion. Let A be A,
Of the plurality of locking teeth, with respect to the most distal locking tooth, the band portion from the hem portion to the top portion of the locking tooth adjacent to the base end side in the extending direction of the band portion. When the length along the extension direction of is B, the A is formed to be larger than the B,
The band clamp, wherein the most distal locking teeth are provided between the hem portion and the top portion so as to project with an intermittent or continuous slope.
The most distal locking teeth include a first sloped surface located on the distal end side in the extending direction of the band portion, and a second sloped surface located on the base end side in the extending direction of the band portion with respect to the first sloped surface. , A shelf surface provided between the first slope and the second slope, and the tip end side in the extending direction of the band portion and the extension of the band portion of the most distal locking tooth. The band clamp according to claim 1, wherein a portion projecting stepwise is provided on the base end side in the projecting direction via the first slope and the second slope.
The band clamp according to claim 2, wherein the shelf surface has a constant amount of protrusion from one surface of the band portion.
The top portion of the most distal locking tooth is formed such that the amount of protrusion from one surface of the band portion is constant, or the extending direction of the band portion from the top portion of the most distal locking tooth. Is formed toward the tip side of the,
Let C be the length of the shelf surface along the extending direction of the band portion,
When the length along the extending direction of the band portion of the apex portion or the inclined portion formed with a constant amount of protrusion from one surface of the band portion is D, the C is larger than the D. The band clamp according to claim 2 or 3, which is formed to be large.
Inside the insertion passage of the lock portion, a pair of projecting support portions are provided,
A pair of ribs supported by the pair of projecting support portions is provided on both side portions of the band portion in the width direction orthogonal to the extending direction, and the pair of ribs is provided between the pair of ribs. The band clamp according to any one of claims 1 to 4, wherein tip locking teeth are arranged.