JP2014172633A - Binding band - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain desired fastening force easily.SOLUTION: A binding band 1 comprises: a band part 2 having flexibility and having plural engagement teeth 4 formed along a longitudinal direction on its outer face; and an insertion port 5 disposed on one end of the band part 2 and into which a free end side of the band part 2 is inserted. In inside of the insertion port 5, a lock part 3 on which an engagement claw 6 for engaging with the engagement teeth 4 selectively and holding the band part 2 in a slip-off state is provided. On the band part 2, regulation projection parts 7A-7C for regulating insertion length of the band part 2 with respect to the insertion port 5 by coming into contact to the lock part 3 when the free end side is inserted into the insertion port 5 by a predetermined length range are formed.

Description

  The present invention relates to a binding band.

  Conventionally, resin binding bands have been used to bind, for example, a wire harness itself, or to tighten a connection portion between a rubber boot for inserting the wire harness in a sealed state and an electrical device to which the wire boot is connected. As such an example, the following Patent Document 1 can be cited.

  The binding band disclosed here includes a band portion and a cylindrical lock portion formed at one end thereof, and passes the free end side of the band portion into the lock portion. Then, when the free end is pulled, a sawtooth-shaped uneven portion formed along the longitudinal direction of the band portion is selectively locked in the lock portion, thereby forming a loop having a desired tightening diameter. It is like that.

JP-A-8-175564

  The above-described binding band can lock the serrated uneven portion to the lock portion at an arbitrary tightening position. That is, in the conventional device, when the pulling force applied to the band portion by the operator varies, the tightening force on the object to be tightened easily varies. For this reason, if tightening is insufficient, the object to be tightened may come off relatively easily. Conversely, if it is excessively tightened, the object to be tightened may be deformed or the tightened part may be In the case where the rubber boot is a part corresponding to the seal lip, it is assumed that the seal lip is excessively crushed and burned to the connection partner of the rubber boot under the influence of heat or the like.

  This invention is completed based on the above situations, Comprising: It aims at providing the binding band which can obtain the clamping force desired easily.

The binding band of the present invention has a flexible band portion in which a plurality of locking teeth are formed along the longitudinal direction on the outer surface, and a free end side of the band portion is inserted through one end portion of the band portion. And a lock portion formed with a locking claw that selectively locks with the locking teeth and holds the band portion in a retaining state. A unity band,
When the free end side is inserted into the insertion port within a predetermined length range, the band portion is formed with a regulation protrusion that regulates the insertion length of the band portion with respect to the insertion port by contacting the lock unit It has the characteristics.

  When performing a tightening operation on an object to be tightened with a binding band, a pulling operation is performed from the outlet side by passing the free end side of the band portion through the insertion port of the lock portion. In the present invention, when the band portion is inserted into the insertion port by a certain length, the restricting protrusion comes into contact with the lock portion to restrict further insertion. Therefore, when the locking tooth corresponding to this position is locked with the locking claw, the loop formed by the band portion has a preset diameter. As a result, even if the band portion is pulled roughly, a desired tightening force can be easily obtained while avoiding excessive tightening of the object to be tightened.

Side view of cable ties Same top view Similarly bottom view Cross-sectional view showing the binding state The figure seen from the bottom side of the lock part which shows the situation where a regulation projection falls off from a cable tie Same perspective view

A preferred embodiment of the present invention will be described.
(1) In the binding band of the present invention, a plurality of the restriction protrusions are arranged along the longitudinal direction of the band part, and each restriction protrusion has a thin part formed at a connection portion with the band part. It is preferable that the free end of the band part pulled out from the outlet side of the insertion port is formed so as to be able to drop off by contact with the lock part when the band is pulled.
According to such a configuration, prior to the tightening operation, an appropriate position that matches the size of the object to be tightened is selected in advance from among a plurality of regulated protrusions. And in tightening work, when the free end side of the band part is passed through the insertion port and the free end is pulled, the restriction protrusions that are ahead of the selected restriction protrusion in the insertion direction are in order from the top. Although it abuts on the lock portion, these restricting projections can be broken off from the thin portion by applying a predetermined pulling force. Therefore, until the target restricting protrusion comes into contact with the lock part, all the restricting protrusions in the previous order are dropped off in the above manner and the engaging teeth and the engaging claws are engaged with each other at that position. The binding band has a desired loop diameter. Thus, according to the above configuration, a plurality of desired loop diameters can be set.

(2) Each restricting protrusion may be arranged near the side edge along the longitudinal direction of the band portion.
According to such a configuration, it is possible to avoid a situation in which the dropped regulation protrusion is bitten into the insertion port.

  (3) When the restriction protrusion and the lock part come into contact with either the restriction protrusion or the opposed surface of the lock part, the pressing force against the restriction protrusion is changed to the width of the band part. It is good also as a structure in which the discharge | emission guide surface made to act so that it goes to a direction outward may be formed.

  According to such a configuration, the dropping direction of the restricting protrusion can be guided in the direction from the band portion toward the outside, and therefore, the biting into the insertion port can be avoided more reliably.

  Next, Embodiment 1 in which the binding band of the present invention is embodied will be described with reference to the drawings.

<Example 1>
1 to 4 show a first embodiment of the present invention. The binding band 1 according to the first embodiment is integrally formed of a flexible synthetic resin material such as 6-6 nylon. The binding band 1 includes a band portion 2 and a lock portion 3 formed at one end of the band portion 2.

  As shown in FIGS. 1 to 3, the band portion 2 is formed in an elongated band shape. The width of the band portion 2 is gradually narrowed only at the free end portion, but the other portions are formed with a substantially uniform width up to the lock portion 3. As shown in FIGS. 3 and 4, a plurality of locking teeth 4 are formed over a predetermined length range on one surface side of the band portion 2 (the surface opposite to the side on which the lock portion 3 protrudes). ing. As shown in FIG. 4, each locking tooth 4 is formed by serrated irregularities. Moreover, the length area | region in which each locking tooth 4 is formed is set in the uniform width area | region of the band part 2, as shown in FIG. It is provided in a width range that leaves both side edges in the direction.

  The lock portion 3 is formed in a rectangular tube shape, and an insertion port 5 is formed through the central portion along the protruding direction of the lock portion 3. The insertion port 5 is formed so that the band portion 2 can be inserted from the free end side. As shown in FIG. 4, a locking claw 6 is provided in the insertion opening 5 so as to be able to bend, and is arranged to face the surface of the band portion 2 on which the locking teeth 4 are formed. . The locking claw 6 is selectively locked to the locking teeth 4 by inserting the free end side of the band portion 2 from the inlet side of the insertion port 5 and performing a pulling operation from the outlet side. Further, in a state where the locking claws 6 and the locking teeth 4 are locked, movement in the direction of pulling the band portion 2 is allowed, but movement in the return direction is prevented. Yes. As a result, when the pulling operation of the band portion 2 is stopped, the band portion 2 can form and maintain a loop with a desired diameter, and can give a predetermined tightening force to the object to be tightened.

  In the band portion 2, a plurality of restricting protrusions 7 </ b> A to 7 </ b> C are provided on the surface opposite to the side where the locking teeth 4 are formed. Each regulation protrusion 7A-7C is distribute | arranged in the formation area of the latching tooth 4, and as shown in FIG. 1, it arrange | positions at three places at equal intervals in this Example. Each regulation protrusion 7A-7C is formed in the shape of a substantially prism, and the connection site | part (base part) with the band part 2 becomes thin, and has become the thin part 9. FIG. As will be described later, each of the regulating protrusions 7A to 7C is in a state in which the band portion 2 is pulled by a force of a certain level or more with the discharge guide surface 8 formed on the entrance side of the insertion port 5 in the lock portion 3 in contact. When this is done, the strength of the thin portion 9 is set so that the entire body can fall through the thin portion 9 and then break and fall off.

  At the time when the leading restricting projection 7A closest to the free end of the band portion 2 comes into contact with the lock portion 3 (specifically, the discharge guide surface 8 in the lock portion 3), the first-stage pull restriction is made. The inner diameter of the loop formed at the time is R1. Subsequently, when the first restricting protrusion 7A comes off and the second restricting protrusion 7B comes into contact with the lock part 3, the second stage tension restriction is performed, and the inner diameter of the loop formed at this point is R2 (R1> R2). Further, when the second restricting protrusion 7B is also dropped and the last restricting protrusion 7C comes into contact with the lock part 3, the third stage pull restriction is performed, and the inner diameter of the loop formed at this time is R3. (R1> R2> R3).

  As shown in FIG. 2, the restricting protrusions 7 </ b> A to 7 </ b> C are arranged near the one side edge in the width direction of the band portion 2 and aligned on the same line along the longitudinal direction.

  Moreover, as shown in FIG. 6, it is a surface used as the entrance side of the insertion port 5 among the outer surfaces of the lock | rock part 3, Comprising: Discharge guidance is carried out to the one side substantially half of the side in which the control protrusion 7A-7C is formed. A surface 8 is formed. The discharge guide surface 8 is an inclined surface that intersects the pulling direction of the band portion 2 at an acute angle, and when the free end side of the band portion 2 is inserted from the inlet side of the insertion port 5 and pulled from the outlet side. Each regulation protrusion 7A-7C can contact | abut. That is, when the free end portion of the band portion 2 protruding from the outlet side of the insertion port 5 is pulled, the discharge guide surface 8 is obliquely outward (see FIG. 5) with respect to the restricting protrusions 7A to 7C contacting the same surface. In the direction indicated by the arrow P). In other words, the regulation protrusions 7A to 7C that have fallen down due to the pressing force are discharged to the outside in the width direction of the band portion 2 so that they do not enter the insertion port 5 by mistake. Yes.

  Next, the function and effect of the present embodiment configured as described above will be described. As shown in FIG. 4, before performing the tightening operation with the binding band 1 of the present embodiment, the connecting tube portion 11 of the rubber boot is put on the end portion of the corrugated tube 10 containing the wire harness WH made of a plurality of electric wires. Fit it as if it were attached. In that state, the band part 2 of the binding band 1 is placed along the outer peripheral surface of the connecting cylinder part 11, and the free end part of the band part 2 is inserted from the inlet side of the insertion port 5 of the lock part 3. Keep going. Thereafter, the free end side of the band portion 2 is pulled, and the loop diameter of the binding band 1 necessary for applying a predetermined tightening force to the connecting cylinder portion 11 is determined in advance in the pulling operation. Therefore, the order of the regulation protrusions 7A to 7C to be selected for this purpose is also determined. Here, for example, the second restriction protrusion 7B from the top is selected.

  Now, as described above, the free end portion of the band portion 2 is strongly pulled while the free end side of the band portion 2 is passed through the insertion port 5 of the lock portion 3. Then, the locking claw 6 in the lock part 3 gets over the locking tooth 4 in order while repeating the bending operation. Since the leading regulating protrusion 7A abuts against the discharge guide surface 8 of the lock portion 3 during the pulling operation, the operator is temporarily subjected to the pulling regulation at this point, but the leading regulating protrusion 7A Therefore, the operator continues the pulling operation. A slightly stronger pulling force is applied to the free end portion of the band portion 2 in order to drop the leading regulating protrusion 7A. As a result, the leading regulating protrusion 7A receives an outward pressing force due to the gradient set on the discharge guide surface 8, so that the leading regulating protrusion 7A is the band portion 2 as shown in FIG. Is discharged outside. Therefore, a situation in which the dropped leading restriction protrusion 7A is accidentally bitten into the insertion opening 5 does not occur. Further, since the restricting protrusions 7A to 7C and the band part 2 are connected by the thin part 9, a large pulling force is not required to drop the leading restricting protrusion 7A.

  If the leading regulating projection 7A is dropped in this manner, the operator performs a pulling operation at a stretch until the target second regulating projection 7B contacts the discharge guide surface 8 while reducing the pulling operation force. At this time, the operator is subjected to the second pulling restriction, and the pulling operation can be stopped by the moderation feeling at that time. At this time, the locking teeth 4 and the locking claws 6 are locked, and the band portion 2 is locked in a detent state, and the band portion 2 has a predetermined loop diameter (R2) and the rubber boot Appropriate tightening force is applied to the connecting tube portion 11.

  Thus, according to the binding band 1 of the present embodiment, the target restriction protrusions 7A to 7C are selected prior to the tightening operation, and the target restriction protrusions 7A to 7C are selected as the lock part 3 ( If the pulling operation is performed until it comes into contact with the discharge guide surface 8), the band portion 2 can automatically form a ring having a desired loop diameter, and an appropriate tightening force is applied to the connecting tube portion 11. be able to. In other words, even if the operator pulls the band portion 2 roughly, the operator is subjected to the pull restriction at the set position, and therefore the band portion 2 can be easily set to a desired loop diameter. Therefore, the tightening is not sweetened and the gap between the connecting tube part 11 and the corrugated tube does not become insufficient, and conversely, there is no possibility that the connecting tube part 11 is excessively deformed due to overtightening. Separately from this example, if the rubber boot with the seal lip is put on the metal pipe part, and if there is excessive tightening, the seal lip part will seize on the pipe side due to the effect of heat. As described above, this situation can be effectively eliminated by using the binding band of this embodiment.

  Further, since the binding band 1 of this example can be selected by arranging a plurality of regulating protrusions 7A to 7C with respect to the band part 2, different fastening diameters can be set for the binding band. Further, the restricting protrusions 7A to 7C are not arranged at the center of the band part 2, but are set to positions shifted toward the side edges by shifting in the width direction, and the discharge guide surface 8 is provided on the lock part 3. The restricting projections 7A to 7C are positively excluded to the side of the band portion 2 by being provided. Thereby, the effect which can avoid effectively also the situation where the dropped control protrusions 7A to 7C bite into the insertion port 5 is obtained.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the restricting protrusions 7A to 7C are arranged close to one edge side in the width direction in the band portion 2 in the above embodiment, they may be arranged in the center. In that case, the setting may be made such that there is almost no clearance between the insertion opening 5 and the band portion 2. Moreover, you may make it arrange | position the control protrusions 7A-7C to the one edge side and other edge side of the band part 2 alternately.
(2) Although the discharge guide surface 8 is formed on the lock portion 3 in the above embodiment, it can be omitted. When the restricting protrusions 7A to 7C are arranged on both sides of the band portion 2 in the width direction, a pair of discharge guide surfaces 8 may be provided while the inclination directions are reversed.
(3) In the above-described embodiment, the restriction protrusions 7A to 7C are formed so as to protrude integrally with the band part 2, but may be formed separately. For example, if a plurality of holes are penetrated along the longitudinal direction on the band part 2 side, and one of them is selected and a stopper pin as the restricting protrusions 7A to 7C is inserted, the stopper pin and the lock part 3 The band portion 2 can be pulled at a stroke until the two come into contact with each other, and the binding band 1 can have a desired loop diameter at the contact position.

DESCRIPTION OF SYMBOLS 1 ... Bundling band 2 ... Band part 3 ... Lock part 4 ... Locking tooth 5 ... Insertion port 6 ... Locking claw 7A-7C ... Restriction protrusion 8 ... Discharge guide surface

Claims (4)

A band part having flexibility and having a plurality of locking teeth formed on the outer surface along the longitudinal direction;
There is an insertion port provided at one end of the band portion through which the free end side of the band portion is inserted, and the band portion is prevented from coming off by selectively locking with the locking teeth inside the insertion port. A binding band configured to include a lock portion formed with a locking claw to hold in a state,
In the band part, when the free end side is inserted into the insertion port within a predetermined length range, a regulating protrusion that regulates the insertion length of the band part with respect to the insertion port by contacting the lock unit A binding band characterized in that is formed.   A plurality of the restriction protrusions are arranged along the longitudinal direction of the band part, and each restriction protrusion has a thin part formed at a connection portion with the band part, and is drawn out from the outlet side of the insertion port. 2. The binding band according to claim 1, wherein the binding band is formed so as to be able to fall off by contact with the lock portion when the free end of the band portion is pulled.   The binding band according to claim 2, wherein each of the restricting protrusions is disposed near a side edge along the longitudinal direction of the band portion.   When the restriction protrusion and the lock part abut either one of the restriction protrusion or the opposed surface of the lock part, the pressing force against the restriction protrusion is applied outward in the width direction of the band part. The binding band according to claim 2 or 3, wherein a discharge guide surface is formed to act so as to be directed toward the head.

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