JPH01153805A - Clamping band - Google Patents

Abstract

PURPOSE: To secure clamping and raise reliability by arranging a fulcrum portion for clamping a lever, a fulcrum portion for fixing the lever, and a locking portion and an engaging portion at both ends of a band member for clamping and fastening the lever and moving the lever to the fulcrum portion for fixing the lever. CONSTITUTION: One end of a lever member 40 is fixed by a fix portion 30 at the end 10 of a band member 50 of a metal band. The other end of the lever member 40 forms a base end portion 41 having a base end detent 42 functioning as a fulcrum for the lever. A hole 11 is arranged adjacent to the base end portion 41, forming a locking portion 12 with a locking detent 121. An engaging portion 21 for engaging with the locking portion 12 and an escape hole 211 are arranged at a predetermined distance from a narrow-ended end portion 20. A fulcrum portion 22 for fixing the lever is arranged in a projecting way. A hexagonal portion 23 as a side portion of a fulcrum portion 42 for clamping the lever, and a fastening plate 29 having a U-shaped cross-section are welded to the band member. Thus, it is possible to maintain the clamp in a secured way and raise the reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is directed to an elastic body attached to a solid cylindrical object, which is wrapped around the outer peripheral surface of a member having a circumferential surface such as a cover or a boot, and tightened. between the tightening bands used to secure the member in place.

[Prior art]

The conventional tightening band called a one-touch band is made by welding and fixing a lever to the palm joints at both ends of a steel band that has been formed into a loop in advance, and then folding the palm joints using the leverage of this lever. After bending and tightening, the lever was stopped with a stopper (Special Publication No. 5O-14702). Therefore, when this tightening band is used, for example, as a boot band for a universal joint in an automobile, the band itself can be attached with a single touch. It must be assembled into the shaft before assembly, and during installation, applying full tightening force to the lever and tightening the stopper with a small hammer, air hammer, etc., welds may be damaged or the weld may peel off. In particular, since the welded part always bears the full tightening force, there is a risk of unreliability, such as cracking of the weld due to vibration or corrosion during use. Depending on where it is installed, it may be impossible to replace it without disassembling the universal joint itself, which is a fatal flaw. Furthermore, due to the thickness of the lever and the bending caused by folding the band member, there is a large step in the area adjacent to the fulcrum of the lever, and when the band is fastened, the tightening force of the boot at this step is insufficient. In addition to increasing the tightening force and conducting strict lubricant leak inspection not only during installation but also during use, tightening due to differences in the degree of bending of the band members may cause dimensional variations and There are many problems such as local swelling of the outer diameter after fastening. Therefore, a large number of applications have been filed to solve these problems, such as Utility Model Application No. 191409-1983 (
(without welded part), Utility Model Publication No. 60.21529 (
Although there have been ideas for improvements such as improving the winding type and step portion, the former has not been put into practical use due to new problems such as insufficient strength and the latter a significant increase in the number of parts.

On the other hand, as another type of tightening band, the end portions of a steel strip of a predetermined length are provided with temporary connection means, connection means, and hook means for a tightening tool, which are respectively engaged with each other, by press working. There is a format. This tightening band is attached by pre-assembling the two end portions overlapping each other, then tightening using a special tool, and connecting the connecting portions by interlocking them with each other (for example, Jikai 59-137610). This tightening band solves many of the problems of the former and is highly reliable, but at present, as automatic assembling machines have not been developed, it is difficult to perform pre-assembly during installation, and to prevent tool hooking at both ends. There are unique problems such as assembly work such as positioning of special tools to the parts (no guides and in three places) and tightening, which is complicated and requires precision. There are also problems such as the need to prepare special tools for the process, so it has not yet become widely used.

[Problems to be solved by the present invention]

The present invention takes advantage of the features of the lever system of the first prior art, and improves the tightening work that requires the full tightening force to be applied to the lever, which is a disadvantage of the lever method, and prevents welding from peeling off at that time and during use. In addition to solving problems such as uneven tightening, variations in tightening dimensions, and local swelling of the outside diameter after tightening, we have also developed a method that takes advantage of the features of the wrapping method, which is the second conventional technology. By eliminating the drawbacks of pre-assembly and special tools, and making the assembly work easier, we are able to provide a tightening band that has high reliability and easy installation that cannot be expected with these conventional technologies. It was done for a purpose.

[Means for solving problems]

In order to achieve the above object, in the tightening band according to the present invention, a lever member is fixed to one end of the band member made of a metal strip material, and the band member is placed at a predetermined distance from the fixed part of the lever member. A locking portion is provided on the plate surface of the band member, and a locking portion is provided on the other end side of the band member inward from the end (in the direction of the lever).
At a predetermined distance from each other toward the plate surface, an engaging part that sequentially fastens the band member by the locking part and the engaging part, and a band member between the locking part and the fixing part of the lever member. Place the lever fixing fulcrum part at a position where the lever ratio is such that a slight tension can be applied (part of the fastening force may be shared), and tighten the band with sufficient margin to tighten the locking part and the engaging part. A wrap-around type fastener having a tightening lever, which is provided with a lever tightening fulcrum at a position where the lever ratio is such that the lever member can be engaged and fastened, and a stopper that fixes the end portion of the band member to which the lever member is fixed. The belt is attached to an object to be tightened, and the lever member side is turned outward and the engaging part lever member is rotated in the tightening direction with the proximal end of the lever member as the lever tightening fulcrum. Using the fulcrum as a reference point, the lever member is tightened by two actions until the locking portion on the lever member side overcomes the engaging portion on the other end side, and then the lever member is returned to the non-line raising side to reduce the tightening force. The locking portion and the engaging portion are engaged with each other to fasten the band in the same manner as a wrap-around tightening band. Then, the proximal end of the lever member is connected to the lever fixing fulcrum part by rotating the lever member again in the tightening direction, and the band member between the locking part of the band member and the lever fixing part is fixed. While applying a slight tensile force (
(Sometimes a part of the fastening force is shared by the band), and it is tightly attached to the already tightened band and fixed with a stopper.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings. FIG. 1 is a front view showing an embodiment of the tightening band according to the present invention (in an unfolded state), and the band member 50 is made by cutting a metal band material into a predetermined length, and has a pair of end portions 10 and 20
At the end 10, which is sometimes the outer side when tightening, a metal band material thicker than the band member is cut to a predetermined length and formed into an arc shape that tightly fits the circumferential surface of the band when the tightening is completed. One end of the lever member 40 is fixed by spot welding. The other end of the lever member 40 is a proximal end portion 41 that serves as a fulcrum for lever action, and in this embodiment, a small square proximal claw portion 4
2 is provided. The lever proximal end of the hole 11 is placed at a predetermined distance from the fixing part 30 of the end part 10, that is, at a position where it is in close contact with the lower band member when the band is fastened and is as close as possible to the proximal end 41 of the lever member. One side of the portion 41 is provided as the locking portion 12. In this embodiment, a triangular locking pawl 121 is provided at the center of the locking portion 12 and is directed downward to prevent the band from lifting up. The long hole portion 13 is connected to the lever member 4
This long hole is provided across the base end 41 of 0 to facilitate lever rotation (deformation in this part), to prevent the band from swelling in this part, and to accommodate a fulcrum part for fixing the lever, which will be described later. It is also possible to omit it. The tip of the other end 20 is tapered to make it easier to wrap around the object to be fastened, and the locking portion 12 is positioned at a predetermined distance from the tip, that is, at a position where the band is tightened by a predetermined amount to maintain the fastening. An approximately V-shaped protruding engagement portion 21 that engages with the band is provided, and an escape hole portion 211 is provided adjacent to the end of the engagement portion 21 to facilitate fastening, pressing, etc. of the band. . Further, at a predetermined distance on the inside and side of the engagement g21 (opposite the end 20), that is, at the time when the band is fastened and the end 10 side is fixed with a stopper to be described later, the fastening is completed. A slight tensile force is applied to the band member between the locking part 12 and the engaging part 12 to prevent floating due to centrifugal force during use (during rotation) or to reduce the fastening force between the locking part 12 and the engaging part 21. A fulcrum part 22 for fixing the lever, which is raised in a V-shape, is provided at a position where the lever ratio is such that the lever can be loaded. Furthermore, the fulcrum portion 22
The locking claw portion 121 of the locking portion 12 is tightened a predetermined distance inwardly from the state in which the band is lightly wrapped around the object to be tightened. The proximal claw portion 42 of the lever member 40 has a lever ratio that can overcome 21 with sufficient margin, and is located at a position where it can be placed side by side with the lever fixing fulcrum portion 22 in terms of machining and strength.
One side of the lever fixing fulcrum part 22rWI of the rectangular hole 23 with a width that allows the lever to be inserted loosely is defined as the lever tightening fulcrum part 24. Further, the end portion of the band member is located inwardly from the square hole portion 23. ! The tightening band of the present invention is constructed by fitting a known stopper 29 with a U-shaped cross section for fixing the band member from the back side of the band member and fixing it by spot welding.

FIG. 2 is also a side view, and the outside of the end of the lever member 4° formed in an arc shape is fixed by welding to the end 10 side of the band member 50. In order to facilitate the insertion of the locking claw portion 121 of the locking portion into the corresponding engaging portion 21 at a distance, the locking claw portion 121 of the locking portion is slightly protruded diagonally on the back side of the pan i member. For simplicity, it may be provided parallel to the band member. On the other end portion 20 side, an engaging portion 21 is provided on the front side of the band member at a predetermined distance from the tip portion in a substantially V-shape and protrudes to a height that allows the locking claw portion 121 to be guided and accommodated. be.

In addition, when the locking claw part 121 is provided parallel to the band member, the engaging part 21 may be made higher by that amount. Furthermore, on the inside thereof, a lever fixing fulcrum part 22 is provided at a predetermined distance from the engaging part 21 on the front side of the band member in a substantially box-like shape and guides the proximal end claw part 42 of the lever member for easy storage. It is designed to be as large and as tall as possible.

FIG. 3 is an explanatory diagram showing the operation of the band member 5.
0 is wrapped around an object to be tightened (not shown), and then the lever member side is placed on top of the body and the proximal claw portion 42 of the lever member 40 is set as a fulcrum for lever tightening, as shown by the wavy line. by inserting it into the square hole 23 of the lever, and bringing both sides of the base end 41 into contact with the band members 50 on both sides of the lever tightening fulcrum 24 (this can be done easily since the band is not tightened). If the lever member 40 is tightened while maintaining this state and rotated to the side (to the right when viewed from the page), the proximal claw portion 42 will automatically strongly abut against the lever tightening fulcrum portion 24 to tighten the lever member 40. The members can be tightened, and as the members are tightened, the parts of the upper and lower band members that are in close contact with each other gradually become elongated holes 1.
Move and enlarge to the 3rd side. The illustrated lever position shows a state in which the band is raised by a predetermined amount and rotated slightly in the opposite direction to cause the locking claw portion 121 to enter the engagement portion 21. Furthermore, if the force acting on the lever member is removed, the engagement between the engaging portion 21 and the locking portion 12 progresses while the upper band and lower band remain in close contact with each other, and the band is completely fastened (in practical use). The rotation and reverse rotation operations may be rough), while the lever member 4
0 is automatically removed from the lever tightening fulcrum by the action of the object to be tightened which bulges into the square hole 23 due to the spring force and tightening force of the band member 50.

FIG. 4 is also an explanatory diagram showing a state in which the attachment is completed, in which the locking claw portion 121 and the engaging portion 21 are fastened together at the engaging portion a, and furthermore, the proximal claw portion of the lever member shown in FIG. 42
into the lever fixing fulcrum part 22 (it is easy to enter into the lever tightening fulcrum part 24 because the body to be tightened bulges out in the square hole part 23) and tighten the lever member. The attachment rotates sideways again and moves from the locking part 12 to the fixing part 3.
While applying a tensile force to the band member between 0 and 0 (in some cases, the band member may bear a part of the fastening force of the already fastened band member), it is placed on top of the already fastened band and tightened with the stopper 29. A fixed installation completion state is shown. In this embodiment, the lever tightening fulcrum part 22 is simply a side part of a square hole part, and the elongated hole part 13 is provided across the lever base end part 41, and the band member in this part is This makes deformation easy, and since the approximately V-shaped raised part of the lever fixing fulcrum part 22 is accommodated in the relief hole part 13, the band member does not bulge in this part and the jump is moderate. , it is possible to facilitate the caulking operation of the stopper 29 and to securely fix it.

FIG. 5 is an explanatory diagram showing the main parts of another embodiment of the locking part and the retaining part, in which the engaging part 25 shown in the cross-sectional view of FIG. One side is bent diagonally toward the front side into a tongue shape, and the locking portion 15 is formed by bending one side portion of a hole 151 provided in the band member 50 into a tongue shape diagonally toward the back side. , since both are engaged and fastened by engaging each other with the engaging portion a, the strength is high, and the band members are kept in close contact with each other, and there is no levitation.
The bands do not easily disengage from each other in this portion.

(b) The engaging portion 26 shown in the cross-sectional view of the figure is a band member 50.
The locking part 16 is formed by extruding one side of the escape hole 261 provided in the hole part 261 in an inverted shape, and the locking part 16 is formed as one side of the hole 161, and the locking claw part 166 that can be inserted into the engaging part 26 is formed. The chisel is formed into an approximately L-shape so that the two pieces are interlocked, and has the same effect as the former.

(c) The engaging portion 27 shown in the cross-sectional view of the figure is the band member 50.
The locking part 17 is extruded into a corrugated shape (the upper surface is oval) on one side of the relief hole 271 provided in the relief hole 27.
1, and a locking claw portion 171 that is inserted into the engaging portion 27 is provided parallel to the band member, and has the feature that the band member can be formed by pressing only from one direction, and the former It has a similar effect.

FIG. 6 is an explanatory diagram showing the main parts of another embodiment of the linear fulcrum part and the fixing fulcrum part, and the lever tightening fulcrum part 28 shown in the sectional view of FIG. It is extruded into a substantially V-shape on the side of the object to be tightened (not shown) in the opposite direction to the fulcrum part 221, and the base end part 43 of the lever member 40 corresponds to this.
The proximal claw portion 431 is also formed as a small projection having a substantially V shape, and is sized so that the lever fixing fulcrum portion 221 can be inserted into the projection. According to this embodiment, since the proximal claw portion 431 is prevented from biting into the member to be tightened when the band is tightened, linear operation is facilitated, and furthermore, the linear fulcrum portion 28 is By biting in, the tightening fulcrum is fixed and stabilized, further improving operability.

It is extruded into a slightly taller wave shape (the upper surface is oval) and is configured to engage with the center of the base end 44 of the lever member 40 to prevent it from falling off at the tip of the wave shape. On the other hand, the bar wire supporting point 282 is provided in the same direction as the fixed supporting point 222 as a small, approximately V-shaped small protrusion whose end surface is approximately perpendicular to the band member. Correspondingly, in order to enable the lever member 40 to be fixed to the fixing fulcrum part, a play hole part 441 is provided which is large enough to accommodate the linear fulcrum part 282, and is used for tightening the lever. The base end portion 44 for fixation is shared. In this embodiment, when operating the lever for tightening and fixing, the base end 44 of the lever can be applied to the sides of the tightening and fixing fulcrum parts, respectively, and the band can be easily attached and pressed. becomes.

Although each embodiment of the present invention has been described above in detail, the present invention is not limited to the above embodiments. For example, even if the structure of the engaging part and the structure of the locking part are reversed, the band can be fastened. It is fine as long as it is possible, and further improve the shape of the engaging part and locking part, improve the shape of the lever fixing fulcrum part and linear fulcrum part, and improve the shape of the lever base end part and base end claw part. , change the combination, or provide another set of locking part and engaging part to engage and fasten in three places at the same time, or make different fastening forces to make them main and sub-fastening parts, respectively. Changes and improvements can be made as appropriate without departing from the spirit of the invention.

〔Effect of the invention〕

As described above, the present invention provides a tightening band using a conventional lever tightening method, and a lever tightening fulcrum part, a lever fixing fulcrum part, and a locking part and an engaging part on both ends of the band member, respectively. The band is tightened and fastened at the lever tightening fulcrum, and by moving the lever to the lever fixing fulcrum, it also functions as a wrap-around tightening band. Therefore, the engagement and fastening of the band is reliably maintained and guaranteed by the locking part and the engaging part, so it is highly reliable, and since only a small tensile force is acting on the welded part between the lever and the band member, The risk of weld peeling or damage due to crimping when the band is attached, or peeling of the weld due to vibration or corrosion during use is reduced, and even if the weld peels off, the function of the fastening band is guaranteed by the fastening portion. In addition, since the tightening force of the band is concentrated in the locking part and the retaining part, the tightening dimensions are accurate with less variation.
Since there is no step difference in the area adjacent to the lever fixing fulcrum, the tightening becomes uniform, and there is no need to increase the amount of tightening or inspect for oil leaks.

In addition, since the lever member is welded to only one end of the band member in an open winding type, there is no folding of the band member at the base end of the lever, so there is little bulge or bulge on the outer diameter side of this part. and always remains constant. Furthermore, since it is a wrapping method, there is no need to assemble or disassemble the device before assembling the device when installing or repairing the device.

In particular, when tightening and fastening the band, one end of the lever is welded to one end of the band member, and the band member is positioned in the axial direction by wrapping the body to be tightened.
Simply align the base end of the lever with one point on the lever tightening fulcrum located in the circumferential direction, and engage and tighten by rotating the lever a little too far in the tightening direction (roughly is fine).
It has many excellent effects, such as not requiring any special tools.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the tightening band according to the present invention (in an unfolded state), Fig. 2 is a side view, Fig. 3 is an explanatory diagram showing the operation, and Fig. 4 is a completed installation. FIG. 5 is an explanatory diagram showing the main parts of another embodiment of the locking part and the engaging part. FIG. 6 is an explanatory diagram showing the main parts of another embodiment of the linear fulcrum part and the fixed fulcrum part. FIG. [Explanation of symbols of main parts] 10-Lever side end 11---m-hole 12.15.16.17-locking part 121.151.166.171-locking claw part 13-11 Elongated hole 20 - Opposite lever end 21.25.26.27 - Engagement part 22.221.222 - Lever fixing fulcrum 23 - Square hole 24.28.282 - = - Lever line fulcrum Part 29 - Stopper 3 - Fixed part 40 - Lever member 41 - Lever base end 42.431 - Base end claw part 441 - Playing hole 50 - Band member Applicant: Nobuo Oki 3 ■ 4th father $! 5-■ (A) (Logistics potato diagram 4 procedure amendment writing method) % formula % Display of 16 cases Patent Application No. 312359 of 1988 2, Title of invention Tightening band 3, Person making amendment Relationship with case Patent Applicant address: 6-17-254 Kugenuma Kaigan, Fujisawa City, Kanagawa Prefecture, Date of amendment order (dispatch mortar): February 23, 1985 5, Symmetrical drawings of the amendment 6, Contents of the amendment: Engraving of all drawings (in the contents) No change) ・-No

Claims (2)

[Claims] 1. A tightening band for tightening the object to be tightened to the cylindrical object by rotating around the outer peripheral surface of the object to be tightened, which is made of an elastic body attached to a cylindrical object, and the band member is made of a metal strip material. a lever member fixed to one end; a locking part provided on the plate surface of the band member at a predetermined distance from the fixed part of the lever member; and a locking part extending inward from the other end of the band member. An engaging part, a fulcrum part for fixing the lever, a fulcrum part for tightening the lever, and a stopper for fixing the lever are provided in this order at a predetermined distance from each other on the plate surface of the member, and the lever is attached to the object to be tightened. Turn the polymerization zone with the member side facing outside,
The proximal end of the lever is engaged with the lever tightening fulcrum, and the lever is rotated in a predetermined direction to apply a tightening force to the band member by levering the locking portion and the engaging portion. After the lever is tightened to a position where it can be engaged, the lever is rotated in the opposite direction to reduce the tightening force caused by the lever action, and the locking portion and the engaging portion are engaged and fastened to each other, and then the proximal end of the lever is tightened. A tightening band, characterized in that the lever member is rotated in the engaging portion tightening direction on the lever fixing fulcrum portion to bring the lever member into close contact with the band member in the fastened state and fixed with a stopper. 2. The tightening band according to claim 1, wherein the engaging portion and the engaging portion are fastened together with an engagement margin.