JP6889919B2 - Band fastener - Google Patents

Description

The present invention relates to a band fastener used for tightening a band extending in a band shape on a utility pole, pipe, duct, or the like.

Conventionally, a band fastener has been used as a device for tightening a band extending in a band shape to a tied object such as a utility pole, a pipe, or a duct. For example, Patent Document 1 below discloses a band tightener in which a winding shaft for winding a band around a bearing portion of a rectangular seat plate having a substantially U-shaped cross section penetrates through a claw wheel. There is. In this case, in this band tightener, the rotation of the take-up shaft is restricted by catching the claw wheel on the protrusion formed on the bearing portion of the rectangular seat plate.

Jitsukaisho 50-142196

However, in such a band tightening device described in Patent Document 1, the claw portion caught on the protrusion of the claw wheel is formed to extend like a gear along the circumferential direction of the take-up shaft, and the entire claw wheel is formed. Is in surface contact with the bearing portion, so that if the flatness of the claw gear is low and warpage is generated, there is a problem that the claw portion and the protrusion are loosely caught and the reliability of the binding ability is lowered.

The present invention has been made to address the above problems, and an object of the present invention is to provide a band fastener capable of restricting free rotation of a winding shaft for winding a band and improving the reliability of binding ability. To do.

In order to achieve the above object, the feature of the present invention is a fastener main body formed by standing upright two side walls facing each other on both sides of a plate-shaped base portion, and a body arranged between the two side walls. The head portion and the bent piece, which are arranged so as to project in a flange shape on the outside of the portion and the two side walls, respectively, are integrally provided, and the band is wound around the body portion through the two side walls in a rotatable state. A band fastener provided with a take-up shaft, the two side walls pressing the head portion and the bent piece outward, respectively, and around the portion of the side wall facing the head portion through which the take-up shaft penetrates. A plurality of convex or concave engaging portions are formed along the circumferential direction of the winding shaft, and the head portion receives a pressing force from the same side wall by projecting toward the side wall and hitting the side wall. It is to be provided with a plate-shaped abutting piece.

According to the feature of the present invention configured as described above, in the band fastener, a butt piece extending in a plate shape from the head portion of the take-up shaft toward the side wall of the fastener body abuts against the side wall to press the pressure. Since it is provided in a received state, the adhesion between the side wall and the abutting piece is improved. Thereby, in the band fastener according to the present invention, the free rotation of the take-up shaft for winding the band is restricted, and the reliability of the binding ability can be improved.

Another feature of the present invention is that in the band fastener, the engaging portion is formed in a state of being work-hardened by plastically deforming a part of the side wall, and the side wall facing the bent piece is wound. It is composed of a reinforcing portion that is work-hardened by plastically deforming the periphery of the portion through which the shaft penetrates into a ring shape.

According to another feature of the present invention configured in this way, the band fastener is formed in a state where the engaging portion is work-hardened by work hardening of a part of the side wall surface by plastic deformation, and faces the bent piece. The periphery of the portion of the side wall through which the take-up shaft penetrates is work-hardened by plastically deforming it into a ring shape, and the periphery of the portion of both side walls through which the take-up shaft penetrates is work-hardened. Since the rigidity is increased by the above, it is possible to suppress the deformation of the side walls at the time of winding the belt and improve the reliability of the binding ability.

Another feature of the present invention is that in the band fastener, one abutting piece is provided with respect to the head, or at positions opposite to each other with the rotation axis of the take-up shaft interposed therebetween. There is.

According to another feature of the present invention configured in this way, the band fasteners are provided with one abutting piece with respect to the head or at positions opposite to each other with the rotation axis of the take-up shaft in between. Therefore, the pressing force from the side wall is received by one or two abutting pieces, so that the adhesion between the side wall and the abutting piece is improved. Thereby, in the band fastener according to the present invention, the free rotation of the take-up shaft for winding the band is restricted, and the reliability of the binding ability can be improved.

Further, another feature of the present invention is that in the band fastener, the tip portion of the abutting piece that abuts on the side wall is bent in the winding direction of the band on the winding shaft.

According to another feature of the present invention configured in this way, the band fastener is formed by bending the tip end portion of the abutting piece that abuts against the side wall in the winding direction of the band on the winding shaft. The winding shaft can be easily rotated in the direction opposite to the winding direction of the band, that is, in the direction in which the winding of the band is released, and the wound band can be loosened.

Further, another feature of the present invention is that in the band fastener, the fastener body is cut in a state where the central portion between the two side walls is left in the portion where the two side walls stand up with respect to the base portion. Each of the notched portions has a notched portion, and the two notches are formed at a position overlapping the engaging portion with a length equal to or larger than the diameter of the engaging portion.

According to another feature of the present invention configured in this way, the band fastener is a portion of the two side walls that are to be deformed outward, each of which is formed with an engaging portion of one side wall and the other side wall. Since the portions of the above facing the engaging portion are deformed in parallel with each other, the rotation of the take-up shaft can be smoothed and the operability of the take-up shaft can be improved.

It is a perspective view which shows the outline of the appearance structure of the band fastener which concerns on one Embodiment of this invention. It is a back view which shows the outline of the appearance structure of the band fastener shown in FIG. It is sectional drawing for demonstrating the operating state of the band fastener shown in FIG. It is a side view which shows the outline of the appearance structure of the fastener body in the band fastener shown in FIG. It is a top view which shows the unfolded state of the winding shaft in the band fastener shown in FIG.

Hereinafter, an embodiment of the band fastener according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an outline of an external configuration of the band fastener 100 according to the present invention. 2 is a rear view showing an outline of the external configuration of the band fastener 100 shown in FIG. 1. FIG. Further, FIG. 3 is a cross-sectional view for explaining an operating state of the band fastener 100 shown in FIG. It should be noted that each figure referred to in the present specification may be schematically represented by exaggerating some of the components in order to facilitate the understanding of the present invention. Therefore, the dimensions between the components are shown. And ratios may differ. The band fastener 100 is an instrument that tightens a band B extending in a band shape to a bound object WK such as a utility pole, a pipe, or a duct.

The band fastener 100 is mainly composed of a fastener main body 101 and a take-up shaft 110. The fastener main body 101 is a component that supports the take-up shaft 110 and is attached to the bound object WK, and is mainly composed of a base portion 102 and two side walls 105 and 106. In this case, in the fastener main body 101, the base portion 102 and the side walls 105 and 106 are integrally formed by pressing one metal plate.

The base portion 102 supports two side walls 105 and 106, and is a portion around which one end of the band B is wound, and is formed in a rectangular elongated flat plate shape in a plan view. A band hanging portion 103 and a notch portion 104 are formed in the base portion 102, respectively.

The band hanging portion 103 is a portion of the band B around which one end is wound and hung, and is formed on one end side of both end portions of the base portion 102. More specifically, the band hanging portion 103 is composed of a through hole extending in parallel with each other in the width direction of the base portion 102 and one plate-shaped portion formed extending in the width direction between these two through holes. Has been done.

The notch portion 104 is a portion for suppressing bending deformation of the portion of the side walls 105 and 106 that supports the take-up shaft 110 and facilitating the rotation operation of the take-up shaft 110, and the side walls 105 and 106 of the base portion 102. Is formed in the shape of a through hole in which each part of the standing portion is cut out. More specifically, the notch portion 104 has a length equal to or larger than the diameter of the engaging portion 108 at a position on the base portion 102 that overlaps the forming position of the engaging portion 108, which will be described later, formed on the side wall 105 in a plan view. It is formed. Further, each notch portion 104 formed on the side wall 105 and 106 side is formed with a width leaving the central portion of the side wall 105 and the side wall 106 of the base portion 102 as the bridge portion 104a. In this case, the bridge portion 104a may be formed thicker than the width of each notch portion 104.

The side walls 105 and 106 are portions for supporting the take-up shaft 110, and are formed in a state of standing up from each side edge portion extending in the longitudinal direction of the base portion 102. In this case, the side walls 105 and 106 are formed in a mountain shape in a side view in which the portion supporting the take-up shaft 110 is most overhanging. Further, these side walls 105 and 106 are formed in a shape that is open so that the distance between the side wall 105 and the side wall 106 becomes far toward the tip end side. A shaft through hole 107, an engaging portion 108, and a reinforcing portion 109 are formed on the side walls 105 and 106, respectively.

The shaft through hole 107 is a portion for supporting the take-up shaft 110 in a penetrating state, and is composed of circular through holes formed concentrically with each other on the side walls 105 and 106, respectively. As shown in FIG. 4, the engaging portion 108 is a portion for restricting the rotation of the take-up shaft 110, and is formed in a ring shape around the shaft through hole 107 on the outer surface of the side wall 105.

More specifically, the engaging portion 108 is configured such that a plurality of protrusions protruding outward from the outer surface of the side wall 105 are arranged in a ring shape around the shaft through hole 107. Each protrusion constituting the engaging portion 108 rises substantially perpendicular to the side wall 105 on the front side in the winding rotation direction of the band B by the winding shaft 110, and the winding rotation direction from the same rising surface portion 108a. It has a spherically inclined slope portion 108b on the rear side of the fastener body 101, and is formed in a substantially triangular shape in a side view of the fastener main body 101. The engaging portion 108 is formed by plastic working (pressing) the side wall 105. In FIG. 4, the take-up shaft 110 is shown by a chain double-dashed line.

The reinforcing portion 109 is a portion for reinforcing the periphery of the shaft through hole 107 in the side wall 106, and the periphery of the side wall 106 is formed so as to bulge outward in a ring shape. The reinforcing portion 109 is formed in a work-hardened state by plastic working (pressing) the side wall 106. Further, the reinforcing portion 109 is formed inside the tip portion of the bent piece 115, which will be described later.

The winding shaft 110 is a component for winding the band B, and is mainly composed of a body portion 111, a head portion 112, and a bent piece 115. In this case, the take-up shaft 110 is integrally formed with the body portion 111, the head portion 112, and the bent piece 115 by pressing one metal plate.

The body portion 111 is a portion arranged between the side wall 105 and the side wall 106 to wind up the band B, and is formed by rolling two metal plates facing each other into a cylindrical shape as a whole. The body portion 111 is formed with a band through hole 111a extending along the axial direction while penetrating in the radial direction. The band through hole 111a is a portion for inserting the other end of the band B opposite to the one end. A head portion 112 is formed on one end side of the body portion 111, and a bent piece 115 is formed on the other end side. The direction of rotation of the body 111 toward the side where the band B is wound is called "forward rotation", and the direction of rotation in which the winding state of the band B is released by the reverse rotation of the forward rotation is called "counter-rotation". Sometimes.

The head portion 112 is a portion for the user to rotate the take-up shaft 110, and has a rectangular tubular shape having a cross-sectional shape extending in a direction orthogonal to the axial direction of the body portion 111. In this case, the head portion 112 is formed in a position facing the outer surface of the side wall 105 so as to be manually operable. The head portion 112 is formed with an abutting piece 113 at a position facing the engaging portion 108, and an operation mark 114 indicating the rotation direction of the take-up shaft 110 when tightening the band B on the outer surface is formed. Has been done.

The abutting piece 113 is a portion for restricting the rotation of the take-up shaft 110 by being hooked on the engaging portion 108, and a part of the head portion 112 extends toward the side wall 105 and abuts on the side wall 105. Is formed in. In this case, the abutting piece 113 is formed in a direction of line contact or surface contact with the upright surface portion 108a. In the present embodiment, the abutting pieces 113 are formed at positions opposite to each other with the rotation axis of the take-up shaft 110 interposed therebetween. Further, these abutting pieces 113 are formed so that the tip end side thereof is inclined toward the front side in the rotation direction of the take-up shaft 110. In this case, the inclination angle θ on the tip end side of the abutting piece 113 is preferably 1 ° to 5 °, preferably 3 to 5 ° with respect to the plane perpendicular to the side wall 105.

The bent piece 115 is a portion for attaching the take-up shaft 110 to the side walls 105 and 106 in a rotatably state in cooperation with the abutting piece 113, and is formed on the outer surface of the side wall 106. The bent piece 115 is formed by bending the tip portions of the two metal plates constituting the body portion 111 outward in the radial direction. In this case, since the reinforcing portion 109 is formed so as to protrude around the shaft through hole 107 on the outer surface of the side wall 106, the two bent pieces 115 can be reliably brought into close contact with each other and hung.

Here, the manufacturing process of the band fastener 100 will be briefly described. First, the operator punches out the shape of the fastener main body 101 and the take-up shaft 110 developed into a flat plate shape from a metal plate made of stainless steel or the like by press working. In this case, the punching material in which the fastener main body 101 is developed into a flat plate shape includes a base portion 102, a band hanging portion 103, a notch portion 104, a bridge portion 104a, side walls 105, 106, an axial through hole 107, and engagement. The portion 108 and the portion to be the reinforcing portion 109 are integrally formed. Further, as shown in FIG. 5, the punching material in which the take-up shaft 110 is developed in the shape of a flat plate includes a body portion 111, a band through hole 111a, a head portion 112, a butt piece 113, and a bent piece 115. They are integrally formed.

Next, the operator completes the fastener main body 101 by bending each part of the punching material obtained by developing the fastener main body 101 into a flat plate shape using a press working machine or the like. In this case, the operator bends the side wall 105 and the side wall 106 at an angle of 90 ° or more with respect to the base portion 102 so that each tip portion is open.

Next, the operator completes a part of the take-up shaft 110 by bending each part of the punched material in which the take-up shaft 110 is developed into a flat plate shape by using a press working machine or the like. In this case, the operator forms the bent piece 115 in a straight line with respect to the body portion 111 without bending. Then, the operator passes the body portion 111 of the take-up shaft 110 through the shaft through hole 107 of the fastener main body 101, and then bends the tip of the body portion 111 to form the bent piece 115 to form the take-up shaft 110. Is assembled to the fastener body 101.

In this case, the operator bends and forms the bent piece 115 so that the bent piece 115 and the abutting piece 113 press the side walls 105 and 106 inward, respectively. As a result, the abutting piece 113 in the take-up shaft 110 is assembled to the fastener main body 101 in a state where the pressing force is received from the side wall 105. Further, since the reinforcing portion 109 in the fastener main body 101 is formed so as to protrude from the outer surface of the side wall 106 inside the tip portion of the bent piece 115, the bent piece 115 can be easily bent at a deep angle and can be bent. Adhesion with the bent piece 115 is improved. Further, since the reinforcing portion 109 is work-hardened by plastic working, it is possible to suppress partial deformation of the side wall 106 due to pressing from the bent piece 115 and tilt the entire side wall 106 toward the side wall 105. Through these operations, the operator can complete the band fastener 100.

(Operation of band fastener 100)
Next, the operation of the band fastener 100 configured in this way will be described. First, the operator prepares the band B and the band fastener 100, respectively. In this case, the band B is made of a flexible metal material or a resin material extending in a band shape. Next, the operator winds one end of the band B around the band hanging portion 103 of the fastener main body 101, and then winds the band B along the outer peripheral portion of the bondage object WK. The other end of B is wound around the body 111 of the take-up shaft 110.

Next, the operator operates the head portion 112 directly by hand or by using a tool such as a screwdriver or pliers to rotate the take-up shaft 110 in the forward direction, thereby placing the band B on the body portion 111 of the take-up shaft 110. By wrapping the band B, the band B is bound to the outer peripheral portion of the bound object WK. In this case, since the abutting piece 113 is constantly receiving a pressing force outward from the outer surface of the side wall 105 or the engaging portion 108, it becomes a resistance to the rotation of the take-up shaft 110.

In particular, when the reaction force of the band B wound around the body 111 exerts a rotational force on the body 111 in the counter-rotation direction in which the band B is loosened, the abutting piece 113 engages with the engaging portion 108. In addition to being strongly pressed against the upright surface portion 108a of the above to prevent the rotation of the take-up shaft 110, the counter-rotation of the take-up shaft 110 is also prevented by the pressing force acting from the side wall 105 on the abutting piece 113. (See FIG. 4). As a result, the band fastener 100 can improve the reliability of the binding ability by restricting the free rotation of the take-up shaft that winds up the band.

Therefore, the operator rotates the take-up shaft 110 in the forward direction while resisting the reaction force from the band B and the pressing force from the side wall 105. As a result, the side wall 105 of the take-up shaft 110 is tilted inward, so that the abutting piece 113 rides on the slope portion 108b of the engaging portion 108 and rotates forward.

Further, when it is desired to loosen the tightened state of the band B, the operator operates the head portion 112 with a tool such as a screwdriver or pliers to rotate the take-up shaft 110 in the counter-rotation direction to rotate the body. By eliminating the winding state of the band B wound on the portion 111 according to the amount of rotation, the binding state of the bound object WK by the band B can be loosened. In this case, the abutting piece 113 is formed so that the tip end side is bent so as to be inclined forward in the winding rotation direction of the band B by the take-up shaft 110, so that the tip end portion is perpendicular to the side wall 105. It is easier to ride on the upright surface portion 108a than when standing up.

Therefore, the operator reverse-rotates the take-up shaft 110 with a stronger force than when the band B is taken up, and causes the abutting piece 113 to ride on the upright surface portion 108a to invert the body portion 111, thereby causing the band B. The winding state of can be loosened.

As can be understood from the above operation description, according to the above embodiment, the band fastener 100 is abutted from the head portion 112 of the take-up shaft 110 toward the side wall 105 of the fastener main body 101 in a plate shape. Since the piece 113 is provided in a state where it abuts against the side wall 105 and receives a pressing force, the adhesion between the side wall 105 and the abutting piece 113 is improved. As a result, in the band fastener 100 according to the present invention, the free rotation of the take-up shaft 110 that winds up the band B is restricted, and the reliability of the binding ability can be improved.

Furthermore, the practice of the present invention is not limited to the above-described embodiment, and various changes can be made as long as the object of the present invention is not deviated.

For example, in the above embodiment, the band fastener 100 is made of stainless steel. However, the band fastener 100 can also be configured by using a metal material or a resin material other than the stainless steel material.

Further, in the above embodiment, the engaging portion 108 and the reinforcing portion 109 are formed by plastic working the side walls 105 and 106, respectively. As a result, the engaging portion 108 and the reinforcing portion 109 can be improved in mechanical strength by work hardening. However, the engaging portion 108 and the reinforcing portion 109 can also be molded by a molding process other than plastic working, for example, a processing method such as cutting process, injection molding process, adhesive process, welding process, or welding process. Further, the reinforcing portion 109 may be omitted.

Further, in the above embodiment, the abutting pieces 113 are formed on the head portion 112 on opposite sides of the rotation axis of the body portion 111. However, at least one abutting piece 113 may be provided on the head portion 112. Therefore, three or more abutting pieces 113 may be provided on the head portion 112.

Further, in the above embodiment, the abutting piece 113 is formed so that the tip portion thereof is inclined forward at the forward rotation direction of the winding shaft 110 at an inclination angle θ. This makes it easier for the take-up shaft 110 to rotate in the counter-rotation direction. However, the abutting piece 113 may be formed so as to extend in the direction perpendicular to the side wall 105. According to this, the abutting piece 113 can be configured to be difficult to rotate or non-rotatable in the counter-rotation direction of the take-up shaft 110.

Further, in the above embodiment, the engaging portion 108 is composed of 10 protrusions arranged in a ring shape. However, the engaging portion 108 is not necessarily limited to the above embodiment as long as the rotation of the take-up shaft 110 can be regulated via the abutting piece 113. That is, the engaging portion 108 may be composed of at least one convex protrusion or concave recess on which the abutting piece 113 is hooked.

Further, in the above embodiment, the base portion 102 is provided with two notch portions 104. In this case, the two notch portions 104 are formed at positions overlapping the engaging portion 108 in a plan view of the fastener main body 101 and having a length equal to or larger than the diameter of the engaging portion 108. As a result, the fastener main body 101 is deformed so that the portions where the engaging portion 108 and the reinforcing portion 109 are formed on the two side walls 105 and 106 that are to be deformed outward are deformed so as to be parallel to each other. The rotation of the take shaft 110 can be smoothed. However, the base portion 102 can be configured by omitting the notch portion 104.

B ... Band, WK ... Bondage object, θ ... Tilt angle of the abutting piece,
100 ... Band clamp, 101 ... Fastener body, 102 ... Base, 103 ... Band hook, 104 ... Notch, 104a ... Bridge, 105 ... Side wall, 106 ... Side wall, 107 ... Shaft through hole, 108 ... engaging portion, 108a ... standing surface portion, 108b ... slope portion, 109 ... reinforcing portion,
110 ... Winding shaft, 111 ... Body, 111a ... Band through hole, 112 ... Head, 113 ... Abutting piece, 114 ... Operation mark, 115 ... Bending piece.

Claims (5)

A fastener body formed by standing upright two side walls facing each other on both sides of a plate-shaped base portion, and
It has a body portion arranged between the two side walls, a head portion arranged in a flange shape on the outside of the two side walls, and a bent piece, and is rotatable with respect to the two side walls. A band fastener provided with a take-up shaft that penetrates in a state and winds up the band at the body.
The two side walls
The head portion and the bent piece are pressed outward, and a plurality of convex shapes or a plurality of protrusions along the circumferential direction of the winding shaft are formed around the portion of the side wall facing the head portion through which the winding shaft penetrates. A concave engaging part is formed,
The head portion
A band fastener comprising a plate-shaped abutting piece that projects toward the side wall and abuts against the side wall to receive a pressing force from the side wall. In the band fastener according to claim 1,
The engaging portion is
It is formed in a state where a part of the side wall is plastically deformed and work-hardened.
The side wall facing the bent piece
A band fastener characterized in that it is composed of a work-hardened reinforcing portion that is plastically deformed in a ring shape around a portion through which the take-up shaft penetrates. In the band fastener according to claim 1 or 2.
The abutting piece is
A band fastener which is provided at one position with respect to the head or at positions opposite to each other with the rotation axis of the take-up shaft interposed therebetween. In the band fastener according to any one of claims 1 to 3.
The abutting piece is
A band fastener characterized in that a tip end portion that abuts on the side wall is bent in the winding direction of the band on the winding shaft. In the band fastener formed in any one of claims 1 to 4.
The fastener body is
Each has a notch portion notched in a portion where the two side walls stand up with respect to the base portion, leaving a central portion between the two side walls.
The two notches are
A band fastener characterized in that it is formed at a position overlapping the engaging portion with a length equal to or larger than the diameter of the engaging portion.

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