JP2006336742A - Fastening band - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastening band usable in repetitive band fastening and releasing operation and also usable when the size of a fastened material is changed. <P>SOLUTION: An engaging tab 4 is inserted and locked into an oblong hole 3 to shape a band member 1 into a ring. As one end 2a of the lever 2 remains locked to any lever lock portion 5, the other end 2b is tilted to the outer periphery of the band member 1 and locked to a rising portion 6a of a buckle 6 standing by at a position corresponding to the lever 2 to reduce the diameter of the band member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tightening band suitably used for, for example, a pipe connection part of an air conditioning duct (heat insulating flexible duct) for air conditioning.

  Various types of bands are used as a tightening band that is attached to a duct, a gas hose, a boot that covers a constant velocity joint, and the like to perform tightening. In particular, a so-called open-type fastening band is used because the height of the fastening portion due to plastic deformation can be kept low. This tightening band has both ends of a metal band-shaped band member formed in a ring shape, and a lever is fixed to one side of the engagement portion. The tightening band is reduced in diameter by hitting one end of the lever against the band member and tilting the other end so as to overlap the outer periphery of the band member, and the lever is fixed with a fastener (Patent Document 1). reference).

  For example, in the case of the open type tightening band in FIG. 6, the band-shaped band member 51 is formed in a ring shape, and the protrusion 52a of the lever 52 fixed to one end side of the band member 51 is provided on the other end side. Lock to the bag-like lever locking portion 53. In this state, the diameter of the lever 52 is reduced by tilting the lever 52 so as to overlap the band member 51 with the locking portion of the protrusion 52a as a fulcrum. Then, a buckle 54 provided upright on both sides of the lever 52 is bent onto the lever 52 with a tool such as a hammer to prevent the lever 52 from returning due to the impact, and the tightening state is fixed.

Or the worm gear drive hose clamp which can adjust the degree of a diameter reduction according to the diameter of a to-be-fastened thing is also proposed (refer patent document 2). In FIG. 7, a screw groove 56 is formed in the longitudinal direction at a predetermined pitch at one end 55a of the fastening band 55, and a housing 58 having a fastening screw 57 is fixed to the other end 55b. The end 55a is inserted into the housing 58 so as to overlap the second end 55b, and the screw 57 is rotated in a predetermined direction with the screw thread 56 of the tightening screw 57 and the screw groove 56 engaged with each other, whereby the tightening band 55 The overlap amount can be reduced or increased by increasing or decreasing the overlap amount.
Japanese Examined Patent Publication No. 7-23723 Japanese Patent Laid-Open No. 2002-13682

Open type tightening band can be used without maintenance, but it can be detached from the outer periphery of the object to be tightened, so it is used for repeated use where it is necessary to loosen the band once and perform maintenance work, and then tighten the band again. There is a case. However, when the buckle once folded on the lever with a hammer or the like is raised again, the buckle breaks and cannot be used, or the raised buckle is bent again with a hammer or the like. There is a risk that it will not be possible to suppress all of the above.
In addition, if the size of an object to be tightened (for example, a pipe or a shaft) changes, it is necessary to use a tightening band having a different diameter. Therefore, the number of types of bands increases according to the size of the object to be tightened, and component management becomes complicated.
Moreover, since a band cannot be attached or detached unless a tool is used, there is a problem that it takes time to work.
In addition, if the outer diameter of the object to be tightened is a tube having a diameter of about φ100 mm, the band can be wound around the outer periphery without meandering. However, when the object to be tightened exceeds φ100 mm, the band will meander due to twisting. There is a problem that it becomes difficult to wind. If the band meanders and is wound, there is a problem that the engaging position between the protrusion 52a of the lever 52 and the lever locking portion 53 varies, and the tightening operation becomes difficult.

  Further, when using a worm gear drive type clamp, the diameter can be reduced or increased in accordance with the outer diameter of the object to be tightened. Maintenance can be performed while hanging from a duct or the like. However, since the number of parts constituting the clamp such as the housing 58 and the screw 57 is large and special processing such as drawing is necessary even in press processing, the manufacturing cost increases. In addition, since a tool such as a screwdriver is required to loosen or tighten the screw 57, there is a problem that work efficiency is poor.

  The present invention solves the above-described problems of the prior art, and can be used even when the band tightening and tightening release operations are repeated, and can be used together even if the size of the object to be tightened is changed. It is an object of the present invention to provide a convenient fastening band that can be easily performed.

In order to achieve the above object, the present invention comprises the following arrangement.
A band-shaped band member in which a middle portion of the curved lever is fixed to one end side, an engagement tab having a tongue-like head is formed on the other end side, and a long hole for inserting the engagement tab is provided; A buckle that is erected on both sides of the band member in the width direction and provided with erected portions that are narrower than the lever, and a lever locking portion that is provided at a plurality of locations in the longitudinal direction of the band member and that locks one end of the lever. The engagement tab is inserted into and locked in the long hole to form the band member into a ring shape, and the other end side is tilted to the outer periphery of the band member while one end side of the lever is locked to one of the lever locking portions. The band member is reduced in diameter by engaging with an upright portion of a buckle that stands by at a position corresponding to the lever.
Further, when the band member is reduced in diameter, the engagement tab locked in the long hole slides along the long hole.
Further, the long hole is formed in a width size that allows entry of a lever locking portion projecting outward in a bag shape at a plurality of locations of the band member.
Further, the standing piece of the buckle is characterized in that it is formed in a curved shape with its upper end facing outward in the width direction so that the central part in the height direction is narrower than the lever.
Further, the buckle is provided so as to be slidable at a single location or at a plurality of locations in the longitudinal direction of the band member.
In addition, a protrusion is formed on the base portion that is mounted on the buckle band member, and the band member is provided with a fitting hole into which the protrusion enters.
In addition, a protrusion that enters the lever locking portion is formed on one end side of the lever, and a tip portion on the other end side is formed with a flat portion that warps outward from the hand member to be overlaid. It is characterized by.

If the tightening band of the present invention is used, the engagement tab is inserted and locked into the long hole to form the band member into a ring shape, and one end of the lever is connected to one of the lever locking portions according to the size of the object to be tightened. The other end side is tilted toward the outer periphery of the band member while being locked to the band member, and the band member is reduced in diameter by being locked to the standing part of the buckle waiting at a position corresponding to the lever. Therefore, it is possible to repeatedly tighten and release the band by simply locking and releasing the lever and the buckle, and the lever locking portions are provided at a plurality of locations in the longitudinal direction, so that the size of the object to be tightened can be reduced. Even if it changes, it can be used together. In addition, since the band member can be used in either an open shape or a closed shape, it is easy to use.
Further, when the band member is reduced in diameter, the engagement tab is slid while being locked in the long hole, so that the band is not twisted and meandered when wound around a large-diameter article to be fastened. In addition, since the long hole is formed in a width size that allows entry of the lever locking portion protruding outward in a bag shape at a plurality of locations, the lever locking portion protruding from the overlapping portion of the band is formed. It is possible to prevent the band member from bulging outward in the radial direction by absorbing the height by the long hole.
In addition, the upright piece of the buckle is formed in a curved shape with the upper end facing the outer side in the width direction so that the center part in the height direction is narrower than the lever, so the other end side is set with the one end side of the lever as a fulcrum. It can be locked by a snap fit inserted between the buckles, and the band tightening operation and the tightening releasing operation can be easily performed manually without using a tool.
Further, when the buckle is provided so as to be slidable at a single position or at a plurality of positions in the longitudinal direction of the band member, the lever can be locked with a small number of parts.
In addition, a protrusion is formed on the base part that is attached to the buckle band member, and the band member is provided with a fitting hole into which the protrusion enters. It can be positioned at the position where it is fitted in the hole, and the lever is securely locked to the upright portion by simply tilting the other end side to the outer periphery of the band member while locking one end of the lever to the corresponding lever locking portion. be able to.
In addition, since a protrusion that enters the lever locking portion is formed on one end of the lever, the lever is not displaced by locking the one end of the lever to the lever locking portion with the protrusion. The band member can be tilted. In addition, since a flat portion that warps outwardly away from the hand member is formed at the tip of the other end side of the lever, the flat portion is manually pressed to lock the lever on the band member. It can be stopped.
Moreover, since there are few parts which comprise a band and a metal material can be manufactured only by press work (punching), it can mass-produce cheaply.

  Hereinafter, the best mode for carrying out the present invention will be described. The present invention provides a band member in which a lever is fixed in the middle of one end of the band member, a long hole is formed in the longitudinal direction of the band member, and a tongue-like engagement tab is formed on the other end side. The engagement tab is inserted and locked into the long hole and formed into a ring shape, and the other end side is overlapped with the outer peripheral surface of the band member with the lever locking portion formed on the band member as one end side of the lever. By being tilted, it can be widely applied to a tightening band that reduces the diameter of the band member. Below, the fastening band which fastens the connection part of the duct for air conditioning (flexible duct) of a ventilation system as an example is demonstrated.

First, the configuration of the tightening band will be described with reference to FIGS.
In FIG. 1A, the band member 1 is a band-shaped metal material, for example, a metal material having spring characteristics. A lever 2 is fixed to one end of the band member 1 in the middle. The lever 2 is formed in a circular arc surface so as to be tilted and overlapped with the band member 1 with the one end 2a as a fulcrum. On the other end (tip) side of the lever 2, a flat portion 2 b is formed that warps away from the arcuate surface. By pressing the flat portion 2b, the lever 2 can be pushed down with the one end side 2a as a fulcrum, or the lever 2 locked to a buckle 6 described later can be pushed up and released. Further, a projection 2 c is provided at the center of the one end 2 a of the lever 2.

  In FIG. 1B, a long hole 3 is formed in the longitudinal direction of the band member 1 in the vicinity of the lever 2. An engagement tab 4 having a tongue-like head is formed on the other end side of the band member 1. The long hole 3 guides the engagement tab 4 inserted through the long hole 3 to slide when the lever 2 is tilted to reduce the diameter of the band member 1. As a result, the band member 1 can be wound around the object to be tightened without being twisted (thus without meandering). The width D1 of the long hole 3 is formed in a size larger than the width C1 of the neck portion 4a of the engagement tab 4. Since the engaging tab 4 is formed by raising the neck portion 4a, the sliding property of the engaging tab 4 is improved when the engaging tab 4 moves along the long hole 3.

  Further, the long hole 3 enters the lever locking portion 5 projecting outwardly in a bag shape from the band member 1 except when the lever 2 is locked to the lever locking portion 5 closest to the end of the band. It is formed in a width size that allows As a result, the height of the lever locking portion 5 protruding from the overlapping portion of the band member 1 can be absorbed by the elongated hole 3 to prevent the band member 1 from bulging outwardly or meandering. .

  Further, the length D2 in the longitudinal direction of the long hole 3 is set so that the engagement tab 4 is moved most when the lever 2 is locked to each lever locking portion 5 and the diameter thereof is reduced. It is determined by adding the length E1 to the near lever locking portion 5. The length of this E1 is a dimension that does not contribute to the diameter reduction. However, by adjusting this E1, it can be applied to various sizes of objects to be tightened such as ducts, and it can be applied to objects to be tightened that are larger than the actual tightening diameter. It can be installed with a margin in either form, open or closed.

  In the band member 1, lever locking portions 5 are formed at a plurality of locations (three locations in the present embodiment) in the longitudinal direction. Each lever locking portion 5 is formed in a bag shape that bulges a part of the band member 1 outward. A protrusion 2c provided on one end 2a of the lever 2 is locked to any one of these lever locking portions 5. The protrusion 2c can be used as a guide for raising the lever 2 and can be reliably locked to the buckle 6 by positioning the lever 2 in the width direction and tilting it. A buckle 6 provided with standing portions 6a narrower than the lever 2 on both sides in the width direction is attached to the band member 1 so as to be slidable in the longitudinal direction. A metal material having spring characteristics is used for the buckle 6. Note that the buckle 6 may be fixed to the band member 1 when tightening a duct of a fixed size.

  In FIG. 2A, the buckle 6 has standing portions 6a formed on both sides of the standing base portion 7a, and mounting guide portions 6b integrally formed on both sides of the mounting base portion 7b. The standing base portion 7a and the mounting base portion 7b are integrally formed by a narrow bridging portion 7c. The bridging portion 7c provides elasticity to the standing base portion 7a so that the pressing force when the standing portion 6a is pressed by the lever 2 can be absorbed. The central part in the height direction of the upright part 6 a is formed in a curved shape with the upper end facing both sides in the width direction so as to be narrower than the lever 2. Further, in FIG. 2B, a protruding portion 8 is formed on the standing base portion 7 a, and a fitting hole 9 into which the protruding portion 8 enters is provided in the band member 1. The fitting holes 9 are provided at a plurality of locations (three locations in this embodiment) corresponding to the lever locking portions 5 provided in the longitudinal direction of the band member 1.

  Moreover, in FIG. 2C, the attachment guide part 6b is formed in the both sides of the attachment base part 7b, and is assembled | attached to the band member 1 so that a slide to a longitudinal direction is possible. Since the gap F between the guide portion tips 6c bent in an L shape from both sides of the band member 1 of the mounting guide portion 6b toward the center portion is wider than the width G of the lever locking portion 5 provided in the band member 1, Even if the buckle 6 is slid, the attachment guide portion 6b does not interfere with the lever locking portions 5 provided at a plurality of locations. The buckle 6 can be positioned by sliding in the longitudinal direction of the band member 1 and fitting the protrusion 8 of the standing base portion 7a into any of the fitting holes 9. The buckle 6 can be provided at one place and slid to a predetermined position for use, but can also be provided at a plurality of places corresponding to the lever locking portion 5.

In order to mount the tightening band 10 described above, the band member 1 is formed into a ring shape by inserting and locking the engagement tab 4 into the elongated hole 3 in FIG. The band member 1 tends to expand in the diameter-expanding direction due to the impact, but is formed in a ring shape because the engaging tab 4 is locked to the end of the long hole 3.
Next, in FIG. 4, the lever 2 is selected by the lever locking portion 5 corresponding to the size of the object to be fastened, and the lever 2 is raised to lock the protrusion 2 c of the one end 2 a to the lever locking portion 5. Then, the flat portion 2 b is pressed while the one end portion 2 a of the lever 2 is locked to the lever locking portion 5, and the lever 2 is tilted to the band member 1. At this time, the lever 2 enters and locks while extending the upright portion 6a to both sides. The lever 2 can withstand repeated use even if it is locked or unlocked to the buckle 6.

An example of a procedure for attaching the fastening band 10 to the duct 11 will be described with reference to FIGS.
When the duct 11 is, for example, a heat-insulating flexible duct for air conditioning, a metal opening is formed in the duct opening formed by covering the interior and exterior of the cylindrical body in which the heat insulating material is spirally wound with a metal material with a resin film. With the socket inserted, the fastening band 10 is mounted on the resin film on the exterior side.

  In FIG. 5A, a belt-like fastening band 10 is wound around a duct 11 in a ring shape. In FIG. 5B, the engagement tab 4 is inserted into the elongated hole 3 to temporarily fix the band member 1 in a ring shape. Next, in FIG. 5C and FIG. 5D, the one end portion 2 a is locked to the lever locking portion 5 that can be tightened while the lever 2 is in the standing posture. Finally, in FIG. 5E, the flat portion 2b provided on the front end side of the lever 2 is pressed and tilted toward the band member 1, thereby being engaged with the buckle 6 waiting at a position corresponding to the lever 2 and reduced in diameter. be able to. At this time, since the engagement tab 4 slides with the neck portion 4 a guided by the long hole 3, the band member 1 does not meander. In order to release the tightening of the tightening band 9, the reverse procedure described above may be performed. By releasing the latching state of the lever 2 and the buckle 6 and taking the standing posture, By releasing the locked state of the lever locking portion 5, the tightened state can be loosened while being fitted in the duct 11. Alternatively, the band member 1 can be removed from the duct 10 by extracting the engagement tab 4 inserted in the long hole 3.

  As described above, the tightening operation can be performed without using a tool by using the open-type tightening band 9, so that the workability is improved and the repetitive use can reduce the cost required for maintenance. Can do.

It is a perspective view of the fastening band before fastening. It is a perspective view of the one end side and buckle of a band member. It is a perspective view of the tightening band in the temporarily fixed state. It is a perspective view of a tightening band in a reduced diameter state. It is state explanatory drawing which shows the attachment procedure to the duct of a fastening band. It is a perspective explanatory view of a conventional tightening band. It is a perspective explanatory view of a conventional tightening band.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Band member 2 Lever 2a One end part 2b Flat part 2c Projection part 3 Long hole 4 Engagement tab 4a Neck part 5 Lever latching part 6 Buckle 6a Standing part 6b Mounting guide part 6c Guide part front end 7a Standing base part 7b Mounting base part 7c Bridging part 8 Projection part 9 Fitting hole 10 Tightening band 11 Duct

Claims (7)

A band-shaped band member in which a middle portion of the curved lever is fixed to one end side, an engagement tab having a tongue-like head is formed on the other end side, and a long hole for inserting the engagement tab is provided; ,
A buckle that is erected on both sides of the band member in the width direction and provided with an erect portion narrower than the lever;
Provided at a plurality of locations in the longitudinal direction of the band member is provided with a lever locking portion for locking one end side of the lever,
The engagement tab is inserted and locked into the elongated hole to form the band member into a ring shape, and the other end side is tilted to the outer periphery of the band member while one end side of the lever is locked to one of the lever locking portions. A tightening band, wherein the band member is reduced in diameter by engaging with an upright portion of a buckle waiting at a position corresponding to the lever.   2. The fastening band according to claim 1, wherein when the diameter of the band member is reduced, an engagement tab locked in the long hole slides along the long hole.   2. The fastening band according to claim 1, wherein the elongated hole is formed in a width size that allows a lever engaging portion protruding outwardly in a bag shape at a plurality of locations of the band member to enter.   The fastening band according to claim 1, wherein the upright piece of the buckle is formed in a curved shape with an upper end facing outward in the width direction so that a central portion in the height direction is narrower than the lever.   The fastening band according to claim 1, wherein the buckle is provided so as to be slidable at one or a plurality of locations in the longitudinal direction of the band member.   2. The base portion mounted on the buckle band member so as to overlap is formed with a protrusion, and the band member is provided with a fitting hole into which the protrusion enters. Fastening band.   One end of the lever is formed with a protrusion that enters the lever locking portion, and the other end is formed with a flat portion that warps outward from the hand member to be overlaid. The fastening band according to claim 1, wherein

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