JP2011011799A - Binding tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved banding tool which facilitates an inserting operation of the tip of a band into a band insertion hole of a banding head so that the inserting operation of the tip of the band can be easily performed even when the condition is bad such as in a narrow place and in a deep place by devising a structure of a metal-made banding tool by a ball locking type suitable for a high fastening strength.SOLUTION: The banding tool includes: a flat cylindrical banding head 1 having the band inserting hole 6 formed by surrounding with a locking wall 1A having a ball guiding face 5a, a bottom wall 1C opposing the locking wall 1A, and left and right side walls 1B and 1B connecting the locking wall 1A with the bottom wall 1C; a banding band 2 having a band base end 2A folded back on the band inlet 6A side and locked to the bottom wall 1C; and a ball 3 for locking. The end on the band inlet 6A side of the locking wall 1A is extended so as to project outward more than the end of the corresponding bottom wall 1C. An expanding part 10 for reinforcement protruded and formed into a laterally long shape in the left and right directions to the band inserting-through direction is provided at part of the side end of the band inlet 6A of the locking wall 1A.

Description

  The present invention relates to a binding tool having a metal binding head, a metal binding band, and a locking ball mounted on the binding head, a so-called ball lock type steel binding tool.

  As shown in FIG. 12, this type of binding tool is a direction in which the binding band 2 wound around the binding target and inserted into the binding head 1 is about to be pulled out from the binding head 1 (the direction of arrow A). When the movement to move is generated, the locking ball 3 that moves with the movement is guided by the curved and inclined guide inner surface 5a of the lock wall 1a that is the ceiling wall of the bundling head 1 and bites into the bundling band 2 The structure is such that a locking action occurs and the binding band 2 cannot be pulled out and can be bound. Each of the binding head 1, the binding band 2, and the ball 3 is made of metal, and is a binding tool A that can bind and maintain a binding target such as a metal pipe group and a large number of wires.

  The ball-locking steel binding tool has a higher binding force than the synthetic resin binding tool, so it is necessary to tighten the cable tightly or when it is required to be more durable. It is suitable for. As an example of such a binding tool, one disclosed in Patent Document 1 is known.

  By the way, the ball-locking steel binding band is significantly thinner than the resin band, and of course, the band insertion hole thickness dimension of the binding head is clearly clear compared to the resin band. small. Therefore, it is difficult to insert a band tip into the band insertion hole after the binding band is wound around a binding target such as a wire harness or a pipe group (an operation for inserting the band tip into the band insertion hole).

  In other words, the band width of the banding hole of the bundling head is very narrow, and it is difficult to insert the tip of the band, for example, in bundling work in a narrow place such as the inner corner of the bonnet or a place where fingers are difficult to reach, It is difficult to insert the end of the band into the band insertion hole, which is troublesome and troublesome, and the work efficiency is extremely poor. Therefore, the binding tool still has room for improvement in terms of workability.

JP-A-9-104466

  The object of the present invention is to devise the structure of a metal tie with a ball lock type suitable for high tightening strength, so that the band tip can be inserted even in poor conditions such as narrow places or recessed places. The present invention is to provide an improved device that facilitates the operation of inserting the band tip into the band insertion hole of the bundling head, so that it can be easily performed.

According to the first aspect of the present invention, in the binding tool, the lock wall 1A in which the bulging wall portion 5 having the guide inner surface 5a for guiding the ball is raised, the bottom wall 1C facing the lock wall 1A, and the lock wall A flat cylindrical binding head 1 having a band insertion hole 6 surrounded by left and right side walls 1B, 1B connecting 1A and the bottom wall 1C;
When the bulging wall portion 5 is closed from the inner passage portion 2a that is inserted into the band insertion hole 6 and continues from the inner passage portion 2a, it is folded back on the band inlet 6A side along the outer surface 1c of the bottom wall 1C. A band base end portion 2A having an outer end portion 2b and locked to the bottom wall 1C, and a band in which the bulging wall portion 5 in the band insertion hole 6 opens following the inner passage portion 2a. A flexible binding band 2 formed with a band body portion 2B extending from the outlet 6B side;
A ball 3 for locking that is located inside the bulging wall 5 and is housed in the binding head 1 in a state in which extraction from the band outlet 6B side is restricted,
The end of the lock wall 1A on the band inlet 6A side is extended so as to protrude outward from the corresponding end of the bottom wall 1C.

  According to a second aspect of the present invention, in the binding tool according to the first aspect, the lock wall 1A has a horizontally long shape in the left and right direction with respect to the band insertion direction at a portion of the lock wall 1A closer to the band inlet 6A than the bulging wall portion 5. A bulging portion for reinforcement 10 formed so as to be raised is provided.

  The invention according to claim 3 is the binding device according to claim 1 or 2, wherein the protruding amount D of the extension wall portion 9 protruding outward from the end of the bottom wall 1C in the lock wall 1A is the band. It is characterized in that it is set to be not less than √3 times the thickness direction dimension d of the band insertion hole 6 more than the thickness direction dimension d of the insertion hole 6.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the left and right ends are inclined or curved so that the width of the extension wall portion 9 is tapered. It is what.

  According to the first aspect of the present invention, the lock wall is extended from the band entrance side, so that the band tip is applied to the inner surface of the extended part. If pushed in this way, the inner surface of the extension forming portion becomes a guide guiding surface, and the band tip can be easily and smoothly inserted from the band entrance into the band insertion hole. In other words, this substantially corresponds to an increase in the vertical width of the band entrance, and is improved so that the band tip insertion operation is very easy. As a result, by devising the structure of a metal tie with a ball lock type that is suitable for high tightening strength, the band tip can be easily inserted even in poor conditions such as in narrow spaces or deep spaces. For example, it is possible to provide an improved device in which the operation of inserting the band tip into the band insertion hole of the bundling head is facilitated.

  According to the second aspect of the present invention, details will be described in the section of the embodiment. However, since a bulging portion for reinforcement that is long on the left and right is formed on the front side portion of the bulging wall portion in the lock wall, The bending strength and rigidity of the front end portion can be efficiently improved, and an improved binding tool having a binding head that can withstand a high level of expansion force caused by a ball during self-locking at a higher level can be provided.

  According to the invention of claim 3, if the protruding amount of the extension wall portion is formed to be equal to or larger than the thickness direction dimension of the band insertion hole, the difficulty of inserting the band tip portion into the band insertion hole is substantially eliminated to a level that does not cause a problem. If it is formed to be √3 times or more, it is very easy to insert, and there is an advantage that a good and smooth binding operation can be performed even if there is a disadvantage such as a narrow binding place or a place where it is difficult to visually recognize.

  According to the invention of claim 4, since the left and right ends are inclined or curved so that the extension wall portion is tapered, the size of the projecting forward from the bottom wall is increased. Thus, there has been realized a binding tool having a binding head in which the extension wall portion is unlikely to obstruct and the band tip end portion is easily inserted into the band insertion hole. In addition, since it is an inclined side surface, it is preferable that fingers and other things are caught or caught at the corners of the extension wall part, or the risk of being scratched is eliminated or reduced, and the handleability is improved.

Overall perspective view looking down from above the binding tool Overall perspective view looking up from below the binding tool Enlarged view of the binding head portion of FIG. Enlarged view of the binding head portion of FIG. Sectional view of the bundling head in the bundling state Sectional view of the binding head part showing the state in which the binding target is tightened Cross-sectional view of the bundling head showing the self-locking action of the ball The perspective view which shows the base end part of a binding band Perspective view looking up from below the binding head Bottom view of binding head Sectional drawing which shows the principal part of the binding tool by Example 2 Sectional drawing of the principal part which shows the conventional binding tool

  Embodiments of a binding tool according to the present invention, that is, a ball lock type steel binding tool, will be described below with reference to the drawings.

[Example 1]
As shown in FIGS. 1 to 5, the binding tool A according to the first embodiment includes a binding head 1 made of stainless steel (an example of metal), a binding band 2 made of stainless steel (an example of metal), and a binding head 1. It is comprised from the metal ball | bowl (steel ball | bowl) 3 comprised by the inside. For example, it is a ball lock type steel binding tool A suitable for a binding target T that requires a relatively strong tightening force such as a bundle of many metal pipes or a bundle of metal wires (see FIG. 7).

  As shown in FIGS. 3, 4, 9, and 10, the bundling head 1 has a flat cylindrical shape formed by bending a metal plate piece so that end faces face each other, and has a guide inner surface 5 a that guides the ball 3. The bulging wall portion 5 has a raised lock wall 1A, left and right side walls 1B and 1B formed by being bent from the left and right sides of the lock wall 1A, and bent from the left and right side walls 1B and 1B at the respective ends. A band insertion hole 6 is provided which is surrounded by a bottom wall 1C formed by joining the ends 1t and 1t together. In the present specification, the bulging wall 5 side of the binding head 1 is up, the bottom wall 1C side is down, the band inlet 6A side of the band insertion hole 6 is front, the band outlet 6B side is rear, When the band entrance 6A is viewed from 6B, the right is the right and the left is the left (see FIG. 1).

  The lock wall 1A has a flat ceiling wall portion 7 and a left and right central portion thereof, and a bulge formed by upwardly projecting a portion biased rearward so that a bulge opening portion 5b following the band outlet 6B is formed. And an exit wall portion 5. The bulging wall 5 has a curved shape (see FIG. 5) in which the cross-section (vertical cross-section) seen from the left-right direction is convex upward with a forward-declining slope, and the cross-section seen from the front-rear direction (Transverse section) has a guide inner surface 5a in a state of a substantially semicircular shape. A stop piece 8 for preventing the ball from slipping out is formed integrally by bending a narrow portion continuing from the rear end of the bulging wall portion 5 downward.

  An extension wall portion 9 that protrudes forward following the ceiling wall 7 is integrally formed on the lock wall 1A. The extension wall portion 9 is formed as a tapered ridge having left and right inclined side surfaces 9a, 9a so as to form a trapezoidal shape in a plan view so that the left-right width becomes narrower toward the front. The forward projection amount D from the front end of the bottom wall 1C of the extension wall portion 9 (the front end of the left and right side walls 1B) is about twice the vertical height (thickness direction width) d of the band insertion hole 6 (D = 2d). Is set. Since the extension wall portion 9 is provided, the vertical width of the narrow band inlet 6A in the vertical direction is substantially amplified, and the inner surface (lower surface) of the extension wall portion 9 serves as a guide surface. Thus, the insertion operation of the band tip 2t into the band insertion hole 6 is very easy to perform.

  By providing the extension wall portion 9, the operation of inserting the band tip portion 2t into the band inlet 6A is improved so as to be very easy. In the conventional binding tool shown in FIG. 12, the operation is such that it is accurately positioned in the vertical gap between the lock wall 1A and the inner passage portion 2a and then inserted into the band insertion hole 6. The operation of aligning the band tip 2t in a state of being rotated and floating in the air with the narrow band entrance 6A is difficult, and often troublesome and troublesome. Therefore, if the extension wall portion 9 serving as a ridge is provided, if the band tip 2t is pushed in so as to abut against the ridge-like inner surface 9b of the extension wall portion 9, the ridge-like inner surface 9b serves as a guide guiding surface. The tip 2t can be inserted easily and smoothly into the band insertion hole 6 from the band inlet 6A. That is, it corresponds to the fact that the vertical width of the band entrance 6A is substantially enlarged, which makes it easy to insert.

  This is a very effective means for binding work in a narrow place where fingers are difficult to move or in a place where it is difficult to visually recognize, and the insertion operation of the band tip 2t into the band insertion hole 6 is substantially very easy. Thus, a clear improvement effect can be obtained. When the length of the extension wall portion 9 was changed in various ways and tested, the extension wall portion 9 has an effect of ease of insertion if it protrudes forward even slightly from the front end of the bottom wall 1C, and D = d or more than d When (D ≧ d), the problem of ease of passing the binding band 2 can be almost solved. The distance between the upper edge of the front end of the bottom wall 1C and the lower edge of the front end of the extension wall 9 is at least twice the vertical dimension d of the band insertion hole 6, that is, the forward protrusion D of the extension wall 9 is 1.732 times. It has been found that it is very easy to insert when (√3 times) or more.

  However, if the forward protrusion amount D becomes too large, the distance that the band tip 2t is applied to the inner surface 9b and then moved to the band inlet 6A becomes longer, and the guide function by the inner surface 9b is substantially the same. It has also been found that there are cases. Therefore, the forward protrusion amount D is set to 4 times or less, preferably 3 times or less, of the vertical dimension d of the band insertion hole 6 to maintain ease of insertion of the band tip 2t into the band insertion hole 6. Is desirable. That is, it is considered that the forward protrusion amount D of the extension wall portion 9 is d ≦ D ≦ 4d, preferably set to √3d ≦ D ≦ 4d, more preferably √3d ≦ D ≦ 3d.

  Further, since the extension wall portion 9 is formed on the inclined side surfaces 9a and 9a so that the extension wall portion 9 is tapered, an increase in length (in other words, an increase in size) protruding forward from the bottom wall 1C is achieved. However, the bundling head is realized in which the extension wall portion 9 is unlikely to get in the way, and the ease of insertion of the band distal end portion 2t into the band insertion hole 6 is conspicuous. In addition, since it is the inclined side surface 9a, the possibility of fingers or other things being caught or damaged by the corners of the extension wall portion 9 is eliminated or reduced, so that the handling property is good. In addition, although the above is an example in which the left and right ends of the extension wall portion 9 are formed to be inclined, it is even more preferable that the extension wall portion 9 is curved so as to be convex outward.

  As shown in FIGS. 9 and 10, at the position slightly rearward from the front and rear center of the bottom wall 1C (an example of “a central region in the band insertion direction”), the left and right bent ends (butt ends) 1t and 1t An engagement hole 4 having a rectangular shape is formed in a straddling state. As will be described in detail later, this is for restricting the binding band 2 from coming out of the binding head 1 by engaging the cut-and-raised claw 11 formed at the band base end 2A. The left and right side walls 1B, 1B are both formed as curved walls that are semicircular when viewed in the front-rear direction, and the front-rear length thereof is the same as that of the bottom wall 1C.

  In addition, the band is inserted between the bulging wall portion 5 and the extension wall portion 9 in the ceiling wall portion 7, more specifically between the front end of the bottom wall 1 </ b> C and the bulging wall portion 5. A bulging portion 10 for reinforcement is formed that is bulged in a horizontally long shape in the left-right direction. The bulging portion 10 for reinforcement is integrally formed with the ceiling wall portion 7 by press molding in the same manner as the bulging wall portion 5 and is effective as a means for improving the strength and rigidity of the band inlet 6A side as the lock wall 1. Function. As shown in FIG. 3, the reinforcing bulging portion 10 is set to have a relationship (W> S) in which the lateral width W is longer than the longitudinal width S thereof. In the first embodiment, the reinforcing bulging portion 10 is formed in a curved shape so as to be long in the left-right direction and have a circular cross section, but the shape is not limited thereto.

  At the time of self-locking when the ball 3 bites between the band main body 2B inserted into the binding head 1 and the guide inner surface 5a, a strong force acts to push the binding head 1 up and down. Since the force of the ball 3 acts on the bottom wall 1C via the two binding bands 2 that overlap each other, the force is distributed over a relatively wide range, whereas the ball is directly applied to the lock wall 1A. The lock wall 1 </ b> A pushed by 3 is in a condition where stress concentrates at one point and is easily deformed. Therefore, by forming the reinforcing bulging portion 10 at the front side portion of the bulging wall portion 5 in the ceiling wall portion 7, the bending strength and rigidity of the front end portion of the lock wall 1A are improved. The bundling head 1 that can withstand the strong expansion force of the balls 3 at a higher level can be realized.

  As shown in FIGS. 1, 2, 4 to 8, the binding band 2 includes a band base end portion 2A, a band main body portion 2B, and a band distal end portion 2t that are locked to the binding head 1, and is made of a long band steel. And a flexible band. Specifically, the band base end portion 2A is folded back on the inner passage portion 2a inserted through the band insertion hole 6 and on the band inlet 6A side (the inlet side where the bulging wall portion 5 is closed) following the inner passage portion 2n. The claw 11 has a cut-and-raised claw 11 that engages with the engagement hole 4 formed along the outer surface 1c of the bottom wall 1C and straddling the left and right bent ends (butt ends) 1t and 1t of the bottom wall 1C. Thus, the outer end portion 2 b is engaged with the binding head 1. The band main body 2B is a portion extending from the band outlet 6B side (the outlet side where the bulging wall portion 5 opens) in the band insertion hole 6 following the inner passage portion 2a, and occupies most of the binding band. The band tip 2t is formed in a tapered shape so that it can be easily inserted into the band insertion hole 6.

  The band base end portion 2A is basically a portion formed by bending the band end by 180 degrees, and the engagement between the cut and raised claw 11 formed in the outer end portion 2b and the engagement hole 4 of the bottom wall 1C. The binding band 2 is locked and held by the binding head 1 by a structure in which the front end of the bottom wall 1C is wound and bent 180 degrees. A circular recess 12 that can enter the engagement hole 4 of the bottom wall 1 </ b> C is formed in the inner passage portion 2 a, and the ball 3 can be fitted into the recess 12. Then, the recess 12 and the cut-and-raised claw 11 are arranged so that the both ends 11 and 12 are just inserted into the engagement hole 4 in a state where the band end 2A is attached to the binding head 1 and locked. Is set.

  In addition, as shown in FIG. 6, the band main body 2 </ b> B is passed through the band insertion hole 6 to be extracted from the band inlet 6 </ b> A of the band main body 2 </ b> B in a state where the binding loop P (see FIG. 7) is created. Along with the movement in the direction (arrow B direction), a self-locking action occurs in which the ball 3 moves and is pushed between the band main body 2B and the guide inner surface 5a and strongly presses the band main body 2B. When the band body 2B is pulled in the direction of extraction (in the direction of arrow B), the ball 3 located on the band body 2B on the recess 12 moves forward and downward as shown in FIG. As described above, the band main body 2B is strongly pressed downward to be recessed and deformed so as to enter the recess 12 and to be locked.

  In other words, the inner body portion 2a is provided with a recess 12 that is bent so as to protrude into the engagement hole 4, and the band main body portion that is passed through the band insertion hole 6 from the band inlet (an example of the inlet side) 6A. The bulging wall is such that the ball 3 that is guided and moved along the guide inner surface 5a when the 2B is about to move in the direction to be pulled out from the band inlet 6A can press the band main body 2B toward the recess 12. The part 5 and the engagement hole 4 are formed in relation to each other.

  By the way, in order to load the ball 3 which is a sphere into the bundling head 1 in a state of preventing the ball 3 from coming out, first, when the stopper piece 8 is not bent downward, the bulge formed continuously from the band outlet 6B is formed. The ball 3 is inserted into the bulging wall 5 from the opening 5b, and then the stopper piece 8 is bent downward (state shown in FIG. 5). That is, the ball 3 housed in the bundling head 1 is restricted from being extracted from the band outlet 6B side, which is the side on which the bulging wall portion 5 opens.

  Now, a series of bundling operations by the bundling tool A will be briefly described. In order to form a bundling loop P (see FIG. 7) by winding the band main body 2B around the bundling target T, the band front end 2t is moved to the band entrance. 6A is passed through the band insertion hole 6. For example, the band tip 2t protruding from the band outlet 6B is pulled to tighten the object to be bound, and the tightening of the binding band 2 is released when a predetermined binding force is reached. That is, at the time of releasing the tightening of the binding band when the predetermined binding force is reached, the ball self-locks as shown in FIG. 6 and the movement of the band main body 2B in the direction of the arrow A is prevented, and an effective binding state is obtained. Maintained.

  However, in the case of binding heavy objects such as a large number of metal pipe groups, the tension acting on the binding band 2 is considerably increased, and the tension return force of the binding band 2 when the tightening is released is also considerably increased. Therefore, in such a case, the band main body 2B is strongly pulled back, and the ball 3 further bites and moves from the state shown in FIG. 6, and overlaps the inner passage portion 2a as shown in FIG. Due to the self-locking action of the band main body 2B being recessed to the extent that the dent deformed portion 13 entering the dent 12 is generated in the band main body 2B, the pull back movement of the band main body 2B is stopped. In other words, a binding tool that can withstand binding that requires such a strong tightening force can be realized.

  In the binding tool according to the present invention, the engagement hole 4 of the bottom wall 1C is changed from the position near the conventional band inlet 6A to the front-rear center region, so the portion of the bottom wall 1C on the band inlet 6A side of the engagement hole 4 The holding portions 1h, 1h are increased in length in the front-rear direction, and the holding portions 1h, 1h are first improved so as not to be crushed and deformed even when the engagement hole 4 is strongly pressed by the cut and raised claw 11. Accordingly, even if a strong tensile force is applied to the outer end portion 2b of the band base end portion 2A, there is no inconvenience that the engaging portions 4 are pushed and expanded by the claw 11 and the holding portions 1h and 1h are crushed and deformed. Therefore, it becomes possible to contribute to the improvement of the tightening force.

  A recess 12 that enters the engagement hole 4 is formed in the inner passage portion 2a, and the ball 3 guided by the guide inner surface 5a and the band body 2B is guided onto the recess 12 and recessed in the band body 2B. The engagement hole 4 and the bulging wall portion 5 are related to each other so that the dent deformation portion 13 that protrudes toward the bottom 12 is generated and the self-locking function is exhibited. This is made possible by the fact that the position of the engagement hole 4 is moved rearward from the conventional position. Due to the synergy of the recess 12 entering the engagement hole 4 and the length of the holding portion 1h being increased in length, the holding force of the band base end 2A to the binding head 1 is greatly improved, thereby improving the tightening force. It can contribute to.

  In addition, when the ball 3 is self-locking, the band main body 2B is set so as to be depressed and deformed by using the recess 12 located below the band main body 2B. As a result, a larger braking action (self-locking action) is generated by biting in 3, and the binding band 2 is less loosened than in the prior art and is improved so that it can be firmly locked and held.

[Example 2]
As shown in FIG. 11, the tying member A according to the second embodiment is an example in which the lock wall 1 </ b> A has a short front length and the reinforcing bulging portion 10 is omitted. That is, the forward protrusion amount D of the extension wall portion 9 is shorter than that in the first embodiment. For example, the forward protrusion amount D is the same as the width d of the band insertion hole 6 in the thickness direction (D = d). It is set. Others are the same as the binding tool A according to the first embodiment, and corresponding portions are denoted by corresponding reference numerals.

[Another Example]
The forward protrusion amount D of the lock wall 1A with respect to the bottom wall 1C is not limited to the first and second embodiments, and can be variously changed. Also, the aspect ratio of the reinforcing bulging portion 10 can be variously changed.

DESCRIPTION OF SYMBOLS 1 Binding head 1A Lock wall 1B Left-right side wall 1C Bottom wall 1c Outer surface of bottom wall 2 Binding band 2A Band base end part 2B Band main-body part 2a Inner part 2b Outer end part 3 Ball 5 Swelling wall part 5a Guide inner surface 6 Band insertion Hole 6A Band inlet 6B Band outlet 9 Extension wall 10 Reinforcement bulge D Projection of extension wall d Dimension of band insertion hole in thickness direction

Claims (4)

A band insertion formed by a lock wall having a bulging wall portion having a guide inner surface for ball guidance, a bottom wall facing the lock wall, and left and right side walls connecting the lock wall and the bottom wall. A flat cylindrical binding head having a hole;
An inner passage portion inserted into the band insertion hole, and an outer end portion that is folded back on the band inlet side and extends along the outer surface of the bottom wall when the bulging wall portion is closed from the inner passage portion. And a band base end portion that is locked to the bottom wall, and a band main body portion that extends from the band outlet side where the bulging wall portion of the band insertion hole opens following the inner passage portion. A flexible binding band,
A ball for locking that is located inside the bulging wall portion and is housed in the bundling head in a state in which extraction from the band outlet side is restricted,
A binding tool that is extended and formed such that an end of the lock wall on the band inlet side protrudes outward from a corresponding end of the bottom wall.   2. The binding according to claim 1, wherein a reinforcing bulge portion is formed in a portion of the lock wall on the band entrance side of the bulge wall portion so as to bulge in a horizontally long shape with respect to the band insertion direction. Ingredients.   The protruding amount of the extended wall portion protruding outward from the end of the bottom wall in the lock wall is not less than the thickness direction dimension of the band insertion hole, and preferably not less than √3 times the thickness direction dimension of the band insertion hole. The tying member according to claim 1 or 2, wherein   The binding tool according to any one of claims 1 to 3, wherein left and right ends are inclined or curved so that the width of the extension wall portion is tapered.

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