JP2014088952A - Engagement tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engagement tool capable of satisfying a customer's request for a long band upon its arrangement in which a load applied to fingers at the time of inserting work is reduced, a band part can be inserted with a small inserting force when the band part is inserted into an inserting hole of a head part and, in addition, a claw can be stably engaged into the band part even when the engagement tool is mass produced.SOLUTION: A claw is arranged under a state in which the claw is bent back at an acute angle around the tip of the claw as a base point of bending-back operation in an attitude of the claw in a side view with respect to an inserting direction of a band part. On the other hand, a biasing mechanism for pressing and biasing, in an engaging/disengaging surface direction, a part of the rear surface of the claw at a side opposite to the engaging or disengaging surface of the band part is arranged within a head part. Furthermore, an oscillating fulcrum point for oscillating the claw toward the engaging/disengaging surface of the band part is arranged at the claw part below the claw pressing and biasing position of the claw, and the claw is freely fitted to the head part in such a way that the oscillating fulcrum point is moved in the oscillating direction and the longitudinal direction of the band part.

Description

  The present invention relates to a band-shaped locking tool used to bundle objects to be positioned such as electric wires and piping tubes, or to connect two objects, and more particularly to a claw support mechanism that engages with and disengages from a band.

A band-shaped locking tool used for connecting various wirings, pipes or a plurality of articles includes a head part, a band part extending from the head part, and the band part to and from the head part in one direction. Since it is used in large quantities, many of them are produced by injection molding.
From customers who use the above fasteners, there is strength when the band is made into a loop shape, and when the band is made into a loop shape, the band is inserted into the head, but the insertion force is small from the viewpoint of workability In addition, there are many demands such as preparing various kinds of band lengths.
In response to customer requirements for which various types of inner band lengths should be prepared, a large number of molds for injection molding of bands have been prepared so far.
However, in recent years, with molds made by injection molding, there are many customers who require long bands that cannot be handled due to restrictions on the size of the die plate of the injection molding machine and the size of the mold. In the market, there is a so-called head-separated type locking device that uses a part of the head and the band part that is formed separately before use or before use. It has come to circulate.
In general, this type of head-separated type locking tool employs a technique in which the head is formed into a long shape by injection molding and the band portion is formed by extrusion.
The business operators and the like concerning this case have made proposals as shown in the following "prior art documents" for the above-mentioned head-separated locking device.

JP 2002-195219 A JP2011-189967

  "Patent Document 1" provides a fastener (locking tool) that does not cause insufficient tightening even if the fastening band (band part) is tightened only once and is not tightened twice. For the purpose, the fastener body (head part) having a band insertion hole through which the fastening band (band part) is inserted is allowed to escape backward by the fastening band (band part) inserted through the band insertion hole. In addition, a technique is disclosed in which a locking member (claw) that prevents the fastening band (band part) from coming off by attaching to the fastening band (band part) to which the extraction force is applied is attached.

  In “Patent Document 2”, the strap (band part) is smoothly inserted into the through hole of the head part (head part) without causing breakage of the strap locking member (claw) in the head part (head part). In order to provide a binding tool (locking tool) that can be firmly fixed to each other, each of the pair of locking members (claws) is opposite to each other in the thickness direction thereof. A first surface and a second surface that are positioned, and each tooth tip (tip portion) of the pair of locking members (claws) protrudes from the first surface to each of the pair of through holes. A first support portion that is bent toward two surfaces and is provided so as to partially contact the first surface in each of the pair of locking members (claws); and the first support portion So as to partially contact the second surface at a position further away from the rear end side of the locking member (claw) than It is housed in the housing of the head (head) while being nipped by a second support portion provided, and the techniques are disclosed.

In “Patent Document 1”, the backward swing width of the locking member (claw) that is released and swings when the fastening band (band part) is inserted into the band insertion hole of the fastener body (head part). Since it is possible to properly regulate by the above-mentioned contact portion, insufficient tightening is caused by only one tightening without performing a troublesome method of eliminating the tightening shortage caused by the first tightening by the second tightening. It is possible to fasten the fastened member without any problem.
However, restricting the swinging width of the locking member (claw) must be disposed at a position where the locking member (claw) is securely bited into the fastening band (band part). That is, the angle of the locking member (claw) with respect to the longitudinal direction of the fastening band (band part) necessary for locking the tip of the locking member (claw) to the fastening band (band part) (the locking member is the fastening band) The angle required to bite into) and the allowable width of the posture of the locking member (claw) become extremely narrow, so to speak, it is necessary to pinpoint.
Therefore, it is not suitable for mass production in which variation within a certain range is inevitable, and priority is given to pinpointing the angle and posture of the locking member (claw) for biting into the fastening band (band part), It is necessary to consider the stability of the biting force of the locking member (claw) into the fastening band (band part) due to variations in the locking member (claw) and the fastener main body (head part). ) The urging force to the side has to be increased. As a result, the insertion force when inserting the fastening band (band part) through the band insertion hole of the fastener body (head part) is increased, resulting in fastening. It is inevitable that workability when the band (band part) is inserted into the insertion hole is deteriorated.

  In “Patent Document 2”, the first support portion provided so as to partially contact the first surface and the position separated from the first support portion toward the rear end side of the locking member (claw) are described above. Since the locking member (claw) is sandwiched between the second support portion provided so as to partially contact the second surface, the locking member (claw) is also the strap (band portion). The allowable angle of the angle and the attitude of the locking member (claw) is extremely narrow, so it is necessary to adjust it by pinpointing, and the strap (band part) is inevitably inserted as in “Patent Document 1”. It is inevitable that workability when inserting into the hole is deteriorated.

  Therefore, the present invention, for example, as described in “Patent Document 1”, even if priority is given to preventing double tightening due to the band part slightly loosening due to the action of the nail biting into the band part during tightening, Since it does not hold the same tightening force, it is unavoidable to expand and contract depending on the temperature, humidity and load conditions, etc., so priority is given to preventing loosening of the band during tightening. In view of the fact that there is no such thing, it is determined that it is more effective to reduce the burden on the fingers during insertion work (the effect of the large amount of insertion work is so great that the finger sensation is paralyzed). When inserting the part into the insertion hole in the head, it can be inserted with a small insertion force, and in addition, the customer's long band can be inserted into the band part stably even during mass production. To meet the demands of And to provide a locking tool that can.

In order to achieve the above object, the present invention solves the problem by using the following means.
The first problem solving means is to dispose a claw harder than the band part in a synthetic resin head having a band part insertion hole so that a tip part faces the insertion hole. A locking tool having an engagement / disengagement part configured to engage / disengage the claw and the band part by the tip part biting into and disengaging from the engagement / disengagement surface of the band part, and the engagement part with respect to the insertion direction of the band part The nail is disposed in a state where the nail is folded back at an acute angle with the tip of the nail being the starting point of the nail, while a part of the back surface of the nail on the side opposite to the engagement / disengagement surface A biasing mechanism is provided in the head for pressing and biasing in the direction, and further, the claw is swung in the direction of the engaging and disengaging surface of the band portion at the claw portion below the pressing biasing position of the claw. A moving fulcrum portion is provided, and the swing fulcrum portion is It said pawl to move in the longitudinal direction of the serial band portion to provide a locking tool which is characterized in that is loosely fitted on the head.

  The second problem solving means includes, in addition to the first problem solving means, the shape of the swing fulcrum portion of the nail, the shoulder portion formed by reducing the nail width, and the position of the nail from the most contracted width position of the shoulder portion. A taper-shaped retaining piece that gradually widens on the side opposite to the tip end portion is extended, and a support portion for the rocking fulcrum portion is provided on the head, and the shape of the rocking fulcrum support portion is defined as the retaining piece. There is provided a locking tool characterized in that a pawl is loosely fitted to the head with a taper shape slightly larger than the shape of the retaining piece.

  In addition to the first or second problem solving means, the third problem solving means is formed by dividing the shape of the tip of the claw into a maximum protruding part and an intermediate protruding part toward the engaging / disengaging surface side of the band part. On the other hand, the shape of the engagement / disengagement surface of the band part is such that the band part engagement / disengagement part facing the maximum protrusion part of the nail is convex, and the band part engagement / disengagement part facing the intermediate protrusion part of the nail is convex. Provided is a locking tool formed so as to be a middle stomach.

  In the fourth problem solving means, in addition to any of the first to third problem solving means, two engagement / disengagement sections are prepared, and one engagement / disengagement section intersects with another engagement / disengagement section. A disposed fastener is provided.

  In the fifth problem solving means, in addition to any of the first to third problem solving means, two engaging / disengaging portions are prepared, and another engaging / disengaging portion is arranged in parallel with respect to one engaging / disengaging portion. Provided.

The operation of the first problem solving means is as follows.
When inserting the band part into the insertion hole of the head, the claw moves together with the band part in the insertion direction of the band part by the action of the tip of the claw coming into contact with the engagement / disengagement surface of the band part, and the back surface of the claw is urging mechanism Abut. When the band part is further inserted, the tip of the claw is banded with the contact part of the urging mechanism as a fulcrum while the swinging fulcrum of the claw floats together with the band part as the claw moves in the insertion direction. It will rotate in the direction away from the engaging / disengaging surface of the part. That is, since the claw rotates in the direction of rising, the swinging fulcrum portion of the claw moves on the opposite side of the band portion while slightly floating, and the claw is smoothly rotated. Therefore, the insertion force to the insertion hole of the band portion is reduced by the smooth posture change caused by the lifting and rotation of the claw.
Subsequently, when the band portion moves in the reverse insertion direction, the contact of the tip of the nail to the engagement / disengagement surface of the band portion is in a state where pressure is applied by the constantly urging force of the urging mechanism. Since the tip slightly bites into the band part, the tip of the claw is the power point and the contact surface of the claw biasing mechanism is the fulcrum, and the swinging fulcrum of the claw that is the action point is the band From the state of being lifted by the insertion action, the band part rotates in the opposite direction around the contact surface of the biasing mechanism. Accordingly, the swinging fulcrum of the claw moves in a direction away from the engagement / disengagement surface side of the band portion, and the claw of the claw with respect to the engagement / disengagement surface of the band portion which has been folded at an acute angle with the tip end of the claw being the origin of folding. The posture angle increases. In other words, even if the tip of the nail is slight, the change in the angle of the side of the band and the nail starting from the state where the nail is slightly engaged is greatly increased on the surface of the band. This means that the band part is securely engaged even if there is some variation in the nail position and nail posture due to mass production.

The operation of the second problem solving means is as follows.
In addition to the action of the first problem solving means, the shape of the rocking fulcrum portion of the claw and the shape of the rocking fulcrum support portion of the head are made similar to each other so that the gap in the claw width direction is small. The moving distance can be increased in the longitudinal direction of the band part of the nail, and when the band part is locked, a compression load acts on the nail, but both shoulder parts of the nail are supported by the swing fulcrum support part of the head. Since it is supported, it is possible to maintain a state where there is no influence of this strength at the portion where the shape changes into a tapered shape.

The operation of the third problem solving means is as follows.
The shape of the tip of the claw is divided into a maximum protrusion and an intermediate protrusion on the engagement / disengagement surface side of the band portion, while the engagement / disengagement surface of the band portion faces the maximum protrusion of the nail. By forming the band engaging / disengaging part to be convex and the band engaging / disengaging part facing the intermediate protruding part of the nail to be the middle of the convex shape, the maximum protruding part of the nail and the band part engaging / disengaging Since the press-contact with the convex part is local, the claw can be made to bite into the engagement / disengagement surface of the band part with a small pressing force. Therefore, the urging mechanism that presses the claw is sufficient with the minimum necessary urging force, and as a result, the insertion force reduction of the band portion can be accelerated. Furthermore, the claw tip bites into the band engagement / disengagement surface after preliminary bite by the maximum protrusion, the intermediate protrusion bites into the middle of the band engagement / disengagement surface convex shape, but the band engagement / disengagement surface is slanted Therefore, the middle protrusion and the middle part of the convex shape of the band engaging / disengaging surface are close to point contact, and an extremely good biting effect is obtained compared to the case where the intermediate protruding part and the band engaging / disengaging surface are in parallel contact. It is done. As a result, the above-described operational effects are added to the first and second operational effects, and a stable nail biting force and a gentle insertion effect can be obtained at the same time.

The operation of the fourth problem solving means is as follows.
In addition to the action of the first to third problem solving means, two engagement / disengagement sections are prepared, and one engagement / disengagement section is arranged so as to cross another engagement / disengagement section. A fastener similar to a synthetic resin cable tie can be obtained. Therefore, it is possible to respond immediately even if there are various customer band length requests.

The operation of the fifth problem solving means is as follows.
In addition to the action of the first to third problem solving means, two engaging / disengaging parts are prepared, and the other engaging / disengaging part is arranged in parallel to one engaging / disengaging part. Since both of the inserting operations can be performed from the same direction, when assembling the head portion and the band portion at the site such as bundling, workability is good and convenient.

  In the present invention, when the band part is inserted into the insertion hole of the head, it can be inserted with a small insertion force, and in addition, the band part can be bite into the band part stably even during mass production. The above-mentioned effects can be achieved by adding the means for solving each problem subordinate to the means for solving the first problem, while achieving the intended purpose of being able to meet the demands of the customer's long band. Can be played.

The whole head perspective view showing one example of the present invention. 1 is a perspective view of the central longitudinal section of FIG. Front view of the head shown in FIG. Bottom view of FIG. Right side view of FIG. 3 is a cross-sectional view taken along line AA in FIG. 3 corresponding to FIG. Sectional drawing of the BB line shown in FIG. Sectional view of the CC line shown in FIG. End view of the band portion showing an embodiment of the present invention The front view which shows the length direction of the band part of FIG. 9, and represents a part Assembly explanatory drawing of the whole locking tool showing an embodiment of the present invention formed using the head shown in FIGS. 1 to 8 and the band shown in FIGS. Enlarged explanatory view of the state of locking the band shown in FIGS. 9 and 10 and the claw shown in FIG. Explanatory drawing which shows the engagement / disengagement state which was equivalent to FIG. 2 and FIG. FIG. 7 is an enlarged cross-sectional explanatory diagram of the nail free-fitting state shown in FIG. 13 is an enlarged cross-sectional explanatory diagram of a part of FIG. Whole perspective view of nails alone Cross-sectional explanatory drawing showing another embodiment

1 to 8, two systems of a first engaging / disengaging portion 2 and a second engaging / disengaging portion 3 are arranged orthogonally to a head 1 formed of a synthetic resin such as polyamide or polyacetal.
Each engagement / disengagement part 2 and 3 is the insertion part 21 and 31 which penetrates the head 1 for letting the band part 10 mentioned later pass, and the band part arrange | positioned so that the front-end | tip parts 221 and 321 may face the insertion hole 21 and 31 Claws 22 and 32 made of metal such as copper alloy or stainless steel, and a biasing mechanism 24 that presses and urges a part of the back surface of the claws 22 and 32 toward the engagement / disengagement surface 101 of the band portion 10. 34 and a swing fulcrum portion 222 for swinging the claws 22 and 32 provided in the portions of the claws 22 and 32 below the pressing biasing positions of the claws 22 and 32 toward the engagement / disengagement surface 101 of the band portion 10. 322 and swing fulcrum support portions 23 and 33 formed in the head 1 for loosely supporting the swing fulcrum portions 222 and 322 are basically formed.
In addition, although the insertion hole 21 of the 1st engagement / disengagement part 2 is penetrated, the part in the insertion direction back is closed for the insertion hole 31 of the 2nd engagement / disengagement part 3.

Further, the claws 22 and 32 of the first and second engaging / disengaging portions 2 and 3 will be described in detail with reference to FIG. 16 in particular. The claws 22 and 32 have the tip portions 221 and 321 in the width direction of the claws 22 and 32. A pair of maximum protrusions 221a, 321a with sharp edges positioned at both ends, and positioned inside the maximum protrusions 221a, 321a, with the tips slightly retracted from the maximum protrusions 221a, 321a, and sharp edges at the edges Intermediate protrusions 221b and 321b.
Further, the swing fulcrum portions 222 and 322 on the opposite side of the tip portions 221 and 321 of the claws 22 and 32 are shoulder portions 222a and 322a formed by reducing the width of the claws 22 and 32, and the shoulder portions 222a and 222a, respectively. It is formed by retaining pieces 222b and 322b extending in a tapered shape that gradually widens from the most contracted width position W1 of 322a to the opposite side to the tip portions 221 and 321 of the claws 22 and 32. Then, in the side view of the claws 22 and 23, the middle portions of the tip portions 221 and 321 and the retaining pieces 222b and 322b are bent at an obtuse angle.
The reason for bending in this way will be described with reference to FIG. 6 and FIG. This is because it is easy to secure an angle θ effective for biting between the surface 101 and the tips 221, 32 of the claws 22, 32.
That is, the side view posture of the claws 22 and 32 with respect to the insertion direction of the band portion 10 is a state in which the point a of the tip portions 221 and 321 of the claws 22 and 32 (FIG. 15) is folded back to an acute angle to an angle θ. The claws 22 and 32 are arranged so that
Further, the swing fulcrum support portions 23 and 33 for loosely fitting the swing fulcrum portions 222 and 322 of the claws 22 and 32 are provided on the left and right shoulders of the claws 22 and (32) as shown in FIGS. 222a and (322a) shoulder receiving portions 231 and (321) and a retaining piece 222b extending in a taper shape gradually widening in the opposite direction to the tip portions 221 and (321) starting from the most contracted width position W1. , (322b) and taper receiving portions 232 and (332) having substantially the same shape, and between the outer shape of the taper retaining pieces 222b and (322b) and the taper receiving portions 232 and (332). Provides a gap δ (FIG. 14).

On the other hand, as shown in FIGS. 2 and 6, the urging mechanisms 24 and 34 of the engagement / disengagement units 2 and 3 have a pressing lever 241 to which an elastic force is applied in order to push the longitudinal intermediate portion of the back surface of the claws 22 and 32. , 341 and lever support portions 242 and 342 for supporting the bases of the pressing levers 241 and 341.
The elastic forces of the pressing levers 241 and 341 are such that the tips of the maximum protrusions 221a and 321a of the claws 22 and 32 are at an effective angle θ2 between the engagement / disengagement surface 101 of the band portion 10 and the claws 22 and 32 (in FIG. 15, the claws 22 and 32). (See the posture at the tip of the point b)), and the urging force of slightly biting into the engagement / disengagement surface 101 of the band portion 10 is provided.
The engaging / disengaging portions 2 and 3 configured as described above are arranged so as to be orthogonal as shown in FIGS. 2 and 6, and the two engaging / disengaging portions 2 and 3 other than the claws 22 and 32 are integrated with various resins. The head 1 is formed.

The band portion 10 used by being inserted into the head 1 is made of synthetic resin such as polyamide, polyacetal, polypropylene, etc., so that the engagement / disengagement surface 101 has a wave shape as shown in FIGS. 9, 10 and 12. It is formed continuously by extrusion or the like. More specifically, as shown in FIG. 12, the wavy shape position of the engagement / disengagement surface 101 includes the first crest 101a provided at the position facing the tip of the maximum protrusions 221a, 321a of the claws 22, 32, and the claws. 22 and 32, the second protrusions 101b are arranged so that the middle of the intermediate protrusions 221b and 321b are opposed to each other.
The band portion 10 having the end face shape as described above is formed into a long length of, for example, several hundred meters mainly by extrusion molding, and is cut into a necessary length for use (see FIG. 10). .

The engagement / disengagement of the head 1 and the band portion 10 described so far will be described with reference to FIGS. 14 and 15 for the first engagement / disengagement portion 2. In FIG. When the lever 241 is substantially in contact with or close to the longitudinal intermediate portion on the back surface of the claw 22, the claw 22 is in a position indicated by a solid line, and the position of the tip 221 of the claw 22 is at point a. When the band part 10 is inserted into the insertion hole 21 (in the arrow FY direction) and the tip of the band part 10 reaches the tip part 221 of the claw 22, the force FX1 resists the urging force of the pressing lever 241 against the insertion force FY. Works. Along with this action, the claw 22 moves upward by a free movement range h in the Y direction generated by the gap δ and the taper shape shown in FIG. 14, and the action FX1 (FIG. 15) resists the urging force of the pressing lever 241. It turns in the direction to get up by force. That is, as shown in FIG. 15, the angle θ between the engagement / disengagement surface 101 of the band portion 10 and the claw 22 is reduced to an angle θ2, and the tip of the claw 22 moves to point b. In other words, when the insertion force FY is constant, the force FX2 against the urging force increases as the angle θ approaches θ2, and the position of the claw 22 changes (the claw 22 tip 221 moves from point a to point b). As a result, the force against the urging force of the pressing lever 241 increases.
As a result, it means that the insertion force of the band portion 10 does not change much even if the urging force of the pressing lever 241 accompanying the movement of the claw 22 is increased. Will be improved.

Next, the case where a downward force (force in the direction opposite to the arrow FY) in FIG.
In FIG. 15, the tip portion 221 of the claw 22 at the position b is in a pressure contact state that slightly bites into the engagement / disengagement surface 101 of the band portion 10 by the urging force of the pressing lever 241. The portion of the pressing lever 241 of the urging mechanism 24 that contacts the back surface of the claw 22 with the point b serving as a power point serves as a fulcrum, and the swinging fulcrum portion 222 of the claw 22 serving as the action point is lifted by the insertion action of the band portion 10. From this state, the band portion 10 is rotated in the opposite direction around the contact surface of the pressing lever 241. Accordingly, the swing fulcrum portion 222 of the claw 22 moves in a direction away from the engagement / disengagement surface 101 side of the band portion 10, and is folded back at an acute angle (θ2) with the point b of the tip portion 221 of the claw 22 as a base point. When the tip of the claw 22 moves to the c position as indicated by θ1, the posture angle of the claw 22 with respect to the engaging / disengaging surface 101 of the band portion 10 increases, in other words, the tip of the claw 22 moves from the point b. The position moves to the point c and bites into the engagement / disengagement surface 101 of the band unit 10. That is, even if the tip of the claw 22 is slight, it changes into the angle increase change (from θ2 to θ1) in the side view of the band portion 10 and the claw 22 starting from the state (position of the point b) that bites into the engagement / disengagement surface 101 of the band portion 10. ) Means that the tip portion 221 of the claw 22 greatly bites into the engaging / disengaging surface 101 of the band portion 10, and a reliable band portion even if there is some variation in the nail 22 position and claw 22 posture due to mass production. Ten locks can be realized.

  When the claw 22 tip 221 bites into the engagement / disengagement surface 101, the pressure contact between the maximum protrusion 221a of the claw 22 and the first peak 101a of the engagement / disengagement surface 101 of the band portion 10 becomes local. The mechanism 24 can bite the claw 22 into the engagement / disengagement surface 101 of the band portion 10 with a small pressing force. Accordingly, the urging mechanism 24 that presses the claw 22 is sufficient with a minimum necessary urging force, and as a result, the insertion force reduction of the band portion 10 can be accelerated. Further, the claw 22 tip 221 bites into the band part 10 engagement / disengagement surface 101 after the preliminary projection by the maximum protrusion part 221a, the intermediate protrusion part 221b becomes the second peak 101b of the band part 10 engagement / disengagement surface 101. The middle part of the second peak 101b of the engagement / disengagement surface 101 of the band part 10 has an oblique shape, so the intermediate protrusion part 101b and the second peak 101b of the engagement / disengagement surface 101 of the band part 10 are The middle abdomen is in a state close to point contact, and an extremely good biting effect can be obtained as compared with the case where the intermediate projecting portion 221b and the band engaging / disengaging surface 101 are in parallel with each other. And the above-described easy insertion action can be obtained at the same time.

On the other hand, the compression load acts on the claw 22 in the locked state of the band portion 10, but both shoulder portions 222 a of the claw 22 are supported by the shoulder receiving portions 231 of the swing fulcrum support portion 23 of the head 1. Even in a state in which the claw 22 is loosely fitted to the head 1, a state in which the compression load is not exerted on the loosely fitting portion 222 b of the claw 22 and the taper receiving portion 232 of the head 1 is maintained.
As described above, the shape of the swing fulcrum portion 222 of the claw 22 is changed from the shoulder portion 222a formed by reducing the claw width to the opposite side of the tip portion 221 of the claw 22 from the most contracted width position of the shoulder portion 222a. A taper-like retaining piece 222b that gradually widens is extended, and the shape of the swing fulcrum support portion 23 of the head 1 is slightly larger than the shape of the retaining piece 222b and is similar to the retaining piece 222b. Since the claw 22 is loosely fitted to the head 1 so as to be tapered, the claw 22 can be moved upward by a free movement range h in the Y direction caused by the gap δ of the claw 22 and the taper shape. Therefore, even when the gap δ in the width direction of the claw 22 is small, the movement of the claw 22 in the insertion direction of the band portion 10 can be relatively large. In other words, the insertion force can be reduced when the band portion 10 is inserted, and the angle of the claw 22 can be obtained so that the engagement of the claw 22 with the engagement / disengagement surface 101 is increased when the band portion 10 is locked. Since the gap δ in the width direction can be reduced, the width direction between the maximum protrusion 221a and the intermediate protrusion 221b of the tip 221 of the claw 22 with respect to the first peak and the second peak of the engagement / disengagement surface 101 of the band part 10 can be reduced. In particular, when the maximum protrusion 221a and the intermediate protrusion 221b are provided at the tip 221 of the claw 22, a good and stable locking state of the band portion can be obtained.
In addition, since the effect of the 2nd engagement / disengagement part 3 is the same as the effect of the above-mentioned 1st engagement / disengagement part 2, description is abbreviate | omitted.

As described above, as shown in FIG. 11, the two systems of the first engagement / disengagement unit 2, the second engagement / disengagement unit 3, the band unit 10, and the assembly and binding of the head 1 are orthogonal. The band part 10 having a length of several tens of meters or several hundreds of meters is cut to a desired length, and one end thereof is inserted into the insertion hole 31 of the second engaging / disengaging part 3 of the head 1 and the other end is free. Keep it on the edge. Next, after the band part 10 is wound around the object to be bound (not shown), the free end of the band part 10 is inserted into the insertion hole 21 of the first engaging / disengaging part 2 and the object to be bound is tightened. When a force on the side opposite to the insertion direction is applied to the band portion 10 inserted into the first engagement / disengagement portion 2 and the second engagement / disengagement portion 3, the engagement / disengagement surface 101 of the band portion is locked by the claws 22 and 32 by the above-described action. Is done.
The above-mentioned operation is performed by cutting the band portion 10 to a desired length in advance, inserting one end portion thereof into the insertion hole 31 of the second engaging / disengaging portion 3 of the head portion 1 and making the other end portion a free end. If positioned as a stage work, the customer only needs to insert the free end of the band part 10 into the first engagement / disengagement part 2 in the same manner as the synthetic resin binding band currently in circulation. Can be performed without a sense of incongruity with conventional products, and a locking tool having a length desired by the customer can be provided in a short period of time without particularly making many types of molds.

  The material of the above-described claws 22 and 32 has been described as a metal, but it is sufficient that the claws are harder than the band portion 10. For example, the tip of the band portion 10 is made of a composite material such as polyphenylene sulfide (PPS) or fiber reinforcement. It may be made of hard resin or ceramics that can bite.

  In the embodiment described above, an example in which the first engagement / disengagement unit 2 and the second engagement / disengagement unit 3 are orthogonal to each other has been described. However, the insertion holes 21, 31 of the first engagement / disengagement unit 2 and the second engagement / disengagement unit 3, respectively. The crossing angle may be changed in consideration of workability and the like.

  Furthermore, as shown in FIG. 17, you may prepare two things of the same shape as the 1st engagement / disengagement part 2, and arrange these in parallel. In this case, both of the operations for inserting the band portion 10 into the head 1 can be performed from the same direction. Therefore, when assembling the head 1 and the band portion 10 at a site such as binding, workability is good and convenient. is there.

1 Head 2 First engaging / disengaging part (engaging / disengaging part)
21 insertion hole 22 claw 221 tip 221a maximum protrusion 221b intermediate protrusion 222 swing fulcrum part 222a shoulder 222b retaining piece 23 swing fulcrum support part 24 urging mechanism 3 second engaging / disengaging part (engaging part)
31 Insertion hole 32 Claw 321 Tip portion 321a Maximum protrusion 321b Intermediate protrusion 322 Oscillation fulcrum part 322a Shoulder 322b Retaining piece 33 Oscillation fulcrum support part 34 Energizing mechanism 10 Band part 101 Engaging / disengaging surface 101a First mountain (Convex shape of engagement / disengagement part)
101b Second mountain (convex shape of engagement / disengagement part)

Claims (5)

  A claw harder than the band part is disposed in a synthetic resin head having a band part insertion hole so that the tip part faces the insertion hole, and the tip part of the claw is a member of the band part. A locking device having an engaging / disengaging part configured to engage and disengage the claw and the band part by biting into and disengaging from the surface, wherein the position of the claw in a side view with respect to the insertion direction of the band part is An urging force that presses and urges a part of the back surface of the claw opposite to the engagement / disengagement surface in the engagement / disengagement surface direction while the claw is disposed at an acute angle with the tip of the nail as a turning origin A mechanism is provided in the head, and a swing fulcrum portion for swinging the claw in the direction of the engagement / disengagement surface of the band portion is provided in the claw portion below the pressing biasing position of the claw. The swing fulcrum part is the swing direction and the longitudinal direction of the band part. Fastener to the pawl in order to move to is characterized in that is loosely fitted on the head.   The shape of the swing fulcrum portion of the nail is a shoulder portion formed by reducing the width of the nail, and a retaining piece having a taper shape that gradually widens from the most contracted width position of the shoulder portion to the side opposite to the tip portion of the nail. And a support portion for the swing fulcrum portion is provided on the head, and the shape of the swing fulcrum support portion is slightly larger than the shape of the retaining piece and has a tapered shape similar to the retaining piece. The locking tool according to claim 1, wherein the claw is loosely fitted to the head.   The shape of the tip of the claw is divided into a maximum protrusion and an intermediate protrusion on the engagement / disengagement surface side of the band portion, while the engagement / disengagement surface of the band portion faces the maximum protrusion of the nail. The locking device according to claim 1 or 2, wherein the band portion engaging / disengaging portion to be formed is formed in a convex shape, and the band portion engaging / disengaging portion facing the intermediate projecting portion of the claw is formed in the middle of the convex shape. .   The locking tool according to any one of claims 1 to 3, wherein two engaging / disengaging portions are prepared, and the other engaging / disengaging portions are arranged so as to intersect one engaging / disengaging portion.   The locking tool according to any one of claims 1 to 3, wherein two engaging / disengaging portions are prepared, and another engaging / disengaging portion is arranged in parallel with respect to one engaging / disengaging portion.

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