JP2009168250A - Fastening member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent slippage, to enhance ease of securing, and to obtain a stable fastening force for a long period of time. <P>SOLUTION: A fastening band 2A has a band body portion 20 having an annular portion 21 and a band body projecting portion 22, a lever plate 23 welded to the band body projecting portion 22, and a lever plate securing member 24 secured to the band body portion 20 and securing the lever plate 23 by folding and bending two projecting pieces 24a, 24b. Further, a pattern in which a surface of a metal member is made to be uneven face is in a belt shape formed on a center portion excluding both end portions in a width direction in at least inner and outer peripheries of the annular portion 21. Additionally, the fastening band may not have the lever plate 23 and the lever plate securing member 24. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a fastening band used when fixing a member.

  A cover for protecting a joint portion of a rotating shaft of an automobile is generally called a boot. For example, a joint portion of a drive shaft that transmits the rotational force of a differential gear to a wheel (a rotating shaft on the differential gear side and a wheel attachment) And a joint portion for transmitting the rotational force of the steering wheel to the wheel steering shaft. The number of boot attachment points in one automobile reaches as many as 30.

  The general appearance of this boot has a bellows shape as shown in FIG. 9 on its side surface, a circular cross section, and a hollow inside. The boot 1 has a boot fixing fastening band (hereinafter referred to as a boot fixing band) which is not shown in FIG. 9 on the outer peripheral surface 1a of the large diameter end and the outer peripheral surface 1b of the small diameter end. Is fixed to a rotating shaft or the like by tightening the boot fixing band.

  The boot 1 rotates together with the rotation shaft. Particularly, the boot used for the axle portion rotates at a high speed together with the axle, and thus needs to be securely fixed to the axle.

  For this reason, the boot fixing band is not only easy to install, but also highly reliable in terms of tightening performance that enables strong tightening and durability that can withstand long-term use under harsh usage conditions. Sex is required. Various improvements have been made and put into practical use for such high reliability requirements.

  As an example, there is, for example, a boot fixing band (hereinafter referred to as a conventional boot fixing band) disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 10-26107). FIG. 10 shows this conventional boot fixing band. The boot fixing band 2 is formed by bending an elongated metal member to form an annular portion 21 and overlapping a predetermined length so that both end portions of the belt-like elongated metal member are in contact with each other. And an arcuate lever plate 23 that is fixed to the band main body protruding portion 22 of the band main body portion 20 and gives a tightening force based on the lever principle when the boot 1 shown in FIG. 9 is tightened. And a lever plate fixing member 24 that fixes the leading end portion 23a of the lever plate 23 with the two projecting pieces 24a and 24b when the lever plate 23 is superposed on the band main body portion 20.

  The band body 20, the lever plate 23, and the lever plate fixing member 24 are each made of stainless steel, and the thickness of the band body portion 20 and the lever plate fixing member 24 is 0.3 mm to 0.8 mm. About twice as thick.

  Note that the lever plate 23 has a leading end portion 23 a protruding outward from the leading end portion 22 a of the band main body protruding portion 22, and a rear end portion 23 b contacting the outer peripheral surface 21 a of the annular portion 21 in the band main body portion 20. Further, the band main body protrusion 22 is fixed to the vicinity of the tip 22a (a portion indicated by a dotted circle, hereinafter referred to as a welded portion 22c) by spot welding using electric resistance.

  At this time, the fixed positional relationship of the lever plate 23 with respect to the band main body protruding portion 22 is such that the welded portion 22c of the band main body protruding portion 22 is located in the vicinity of the central portion in the longitudinal direction of the arc-shaped outer peripheral portion of the lever plate 23, and 23 is set to a position where the rear end portion 23b of the band main body 20 contacts the outer peripheral surface 21a of the annular portion 21.

  And after positioning in this way, the lever board 23 is spot-welded to the band main body protrusion part 22. FIG. The spot-welded welded portion 22c is composed of two plates constituting the band main body protruding portion 22 (two plates that are overlapped so that both end portions of the strip-shaped elongated metal member are held together) and the lever plate 23. A total of three plates are stuck together.

  As described above, the lever plate 23 and the band main body protruding portion 22 are fixed by the welded portion 22c, so that the tip portion 23a of the lever plate 23 has a tip portion 23a further than the tip portion 22a of the band main body protruding portion 22. Projecting outward, the rear end portion 23b is in a position to contact the outer peripheral surface 21a of the annular portion 21 in the band main body portion 20. At this time, the distance between the rear end 23b of the lever plate 23 and the root 22b of the band main body protrusion 22 needs to be set to an optimum distance.

  The boot fixing band 2 having such a configuration has the rear end portion 23b of the lever plate 23 as a fulcrum, and the plate surface of the lever plate 23 (the inner peripheral surface of the arc) on the outer peripheral surface 21a of the annular portion 21 in the band main body portion 20. The lever plate 23 is tilted in the direction of the arrow Y1 until it contacts, so that the diameter of the annular portion 21 of the band main body portion 20 is deformed so that a tightening force is applied to the boot 1.

  One boot fixing band 2 is provided on each end of the boot 1. That is, a boot fixing band 2 for the outer peripheral surface 1a at the large-diameter end of the boot 1 and for the outer peripheral surface 1b of the small-diameter end is prepared. Each boot fixing band 2 has the same overall shape and its components, except that the diameter and the like of the annular portion 21 of the band main body 20 are different. Except where necessary, the description is the same.

  On the other hand, the lever plate fixing member 24 is also fixed to the band main body 20 by spot welding or the like. When the lever plate 23 is tilted in the direction of the arrow Y1 and the lever plate fixing member 24 is in a state along the outer peripheral surface 21a of the annular portion 21 in the band main body portion 20, the two protruding piece portions of the lever plate fixing member 24 are used. The levers 24 a and 24 b are bent inward to fix the lever plate 23 to the annular portion 21 of the band main body 20.

  When the boot fixing band 2 having such a configuration is used for tightening the boot 1, first, the state in which the lever plate 23 of the boot fixing band 2 is raised (the lever plate 23 and the annular portion 21 of the band main body portion 20 are connected). The angle formed is close to 90 degrees). In addition, it is good also as the state which the lever board 23 extended in the linear form from the band main-body part 20 without setting it in the state raised in this way. Thereafter, the annular portion 21 of the band main body portion 20 is respectively mounted on the outer peripheral surface 1a of the large-diameter side end portion and the outer peripheral surface 1b of the small-diameter side end portion of the boot 1 shown in FIG. The case where the large-diameter side end is tightened will be described as an example.

  Now, it is assumed that the annular portion 21 of the band main body portion 20 in the boot fixing band 2 is in a state of being wrapped around the outer peripheral surface 1a of the large-diameter side end portion of the boot 1, and the boot fixing band 2 in that state is The operation will be described with reference to FIGS. 11A and 11B show only a part of the boot fixing band 2 that is necessary for explaining the tightening operation, and the illustration of the boot 1 is also omitted. Yes.

  In FIG. 11A, the lever plate 23 is tilted in the direction of the arrow Y1 with the rear end portion 23b as a fulcrum. The rear end portion 23b is in contact with the outer peripheral surface 21a of the annular portion 21 in the band main body portion 20.

  As a result, the rear end portion 23b of the lever plate 23 moves in the direction of the arrow Y2 while applying a pressing force to the annular portion 21 of the band main body portion 20. At this time, the band main body protruding portion 22 is subjected to a pulling force in the direction of the leading end portion 23a of the lever plate 23 along with the bending of the lever plate 23 in the arrow Y1 direction. Due to the pressing force on the outer peripheral surface 21a of the portion 21, the annular portion 21 and the band main body protruding portion 22 are deformed as shown in FIG. As a result, the band main body 20 has a smaller diameter of the annular portion 21 and gives a tightening force to the entire outer peripheral surface 1 a of the large-diameter side end of the boot 1.

  Such a tightening operation of the lever plate 23 is performed until the front end portion 23a of the lever plate 23 abuts on the outer peripheral surface 21a of the annular portion 21 in the band main body portion 20. When the vicinity of the tip 23a of the lever plate 23 comes into contact with the outer peripheral surface 21a of the annular portion 21, the protrusions 24a and 24b (see FIG. 10) of the lever plate fixing member 24 are bent inward to make the lever plate 23 is held. As a result, the lever plate 23 is fixed along the annular portion 21 of the band main body 20.

  Such a conventionally used boot fixing band 2 is easy to tighten, can be reliably tightened, and has a shape with less protrusion in the final state after tightening. It is suitable for use in high-speed rotating parts such as. Moreover, the fastening band which does not have a lever board part shown by patent document 2 (Unexamined-Japanese-Patent No. 11-218282) is also employ | adopted for the same reason. In this way, a fastening band that is formed by bending an elongated metal member to form an annular portion and reducing the diameter of the annular portion to give a fastening force to the boot 1 that is a fastening target member is used in various fields. Has been.

Japanese Patent Laid-Open No. 10-26107 JP 11-218282 A

  Various fastenings for fixing a boot for an automobile such as a fastening band not having a lever plate portion shown in Patent Document 2 as well as the boot fixing band 2 disclosed in Patent Document 1 shown in FIG. The band is strongly required to be reliable in the tightened state, and is also required to be durable enough to withstand long-term use under severe use conditions.

  Further, since this type of boot fixing band 2 and the tightening band shown in Patent Document 2 are generally mirror-finished on the surface, slipping when performing the tightening operation with the lever plate 23 or the like is performed. There are also problems such as easy workability. Further, there are many types of boots 1 in which the boot fixing band 2 and the like are used depending on the automobile manufacturer and the vehicle type. As a result, the boot fixing band 2 also has a diameter of the annular portion 21 and a shape of the lever plate 23. Often slightly different. However, since they are all similar in appearance, there is a problem that management is very troublesome when managing a fastening band such as the boot fixing band 2 for each automobile manufacturer or various vehicle types.

  The present invention has been made to solve the above-described problems, and has an object to provide a fastening band that is sure to prevent slipping, improves workability in attachment, and has a stable fastening force for a long period of time. To do.

  In order to achieve the above-described problems, the fastening band of the present invention has an annular portion formed by bending an elongated metal member, and reduces the diameter of the annular portion to provide a fastening force to the member to be fastened. In the tightening band to be applied, a pattern is formed in a belt shape so that the surface of the metal member becomes an uneven surface at least in the central portion excluding both end portions in the width direction on the inner and outer circumferences of the annular portion.

  In order to achieve the above-described problems, the fastening band of the present invention has an annular portion formed by bending an elongated metal member, and reduces the diameter of the annular portion to provide a fastening force to the member to be fastened. In the tightening band to be applied, both ends of the metal member have engaging portions, and the engaging portions overlap to form one ring, and at least the inner and outer circumferences of the annular portion and both end portions in the width direction are excluded. A pattern in which the surface of the metal member is a concavo-convex surface is formed in a belt shape at the center.

  In order to achieve the above-described problems, the fastening band of the present invention is formed by bending an elongated metal member to form an annular portion, and overlapping both ends of the belt-like elongated metal member by a predetermined length so that the both ends of the band join each other. A band main body part in which a band main body protruding part is formed, and an arc-shaped lever plate that is fixed to the band main body protruding part of the band main body part and gives a tightening force according to a lever principle when tightening a member to be tightened. In the tightening band provided with a lever fixing member for fixing the leading end of the lever plate with the two projecting pieces when the lever plate is superposed on the band main body, at least the inner and outer circumferences of the annular portion. In the central portion excluding both ends in the width direction, a pattern in which the surface of the metal member becomes an uneven surface is formed in a strip shape.

  In order to achieve the above-described problems, the fastening band of the present invention has an annular portion formed by bending an elongated metal member, and reduces the diameter of the annular portion to provide a fastening force to the member to be fastened. In the tightening band to be applied, a pattern is formed in a band shape so that the surface of the metal member becomes an uneven surface at least on one side of the annular portion and excluding both ends in the width direction.

  Here, it is preferable to form a pattern that forms an uneven surface by providing a plurality of linear recesses in parallel to each other in the axial direction of the metal member.

  Here, it is preferable that the metal member is a member having a circular cross section, and the recess has a depth of 2 μm or more and 1/10 or less of the diameter.

  In order to achieve the above-described problems, the fastening band of the present invention has an annular portion formed by bending an elongated metal member, and reduces the diameter of the annular portion to provide a fastening force to the member to be fastened. In the tightening band to be provided, a pattern is formed so that the surface of the metal member becomes an uneven surface at least on the inner and outer circumferences of the annular portion.

  Thus, by forming a pattern on the inner and outer circumferences of the annular portion of the tightening band, there is no slip between the tightening target member. For this reason, workability | operativity improves. In addition, since the pattern is arranged on the inner and outer circumferences of the annular portion, the frictional resistance can be increased, and after the tightening band is tightened to the member to be tightened, the tightening band is placed on the tightening surface of the member to be tightened. Since it becomes difficult to move, a stable tightening force can be maintained for a long time even under severe use conditions.

  Moreover, it is preferable to form the pattern which becomes an uneven surface by providing a plurality of linear recesses in parallel to each other in the axial direction of the metal member. When this configuration is adopted, a pattern is easily formed. Further, in the case of a round bar material, when the bar is twisted, the pattern becomes spiral and the frictional resistance increases.

  In addition, it is preferable that the metal member is a member having a circular cross section, and the concavity and convexity patterns are formed by providing concentric circles around the axis of the metal member in parallel along the axial direction. Adopting this configuration increases the frictional force in the axial direction. Moreover, since the yield strength is improved and the range of expansion / contraction is expanded, the allowable range of the tightening amount is expanded.

  Moreover, it is preferable that the metal member is a member having a circular cross section, and the pattern that becomes the uneven surface is a linear concave or convex shape that spirally extends along the axis of the metal member. According to this, since the pattern is spiral, it is easy to form the pattern, and the frictional force and proof stress are improved and the range of expansion and contraction is expanded.

Moreover, it is preferable that the metal member is a member having a circular cross section, and the recess has a depth of 2 μm or more and 1/10 or less of the diameter. As described above, when the depth of the pattern formed on the plate surface of the fastening band is 2 μm and within a range of 1/10 or less of the diameter, various conditions such as the difference in the material of the fastening target member and the usage environment of the fastening target member It can be made to correspond.

  According to the present invention, it is possible to obtain a tightening band that ensures slip prevention, improves the workability of attachment, and has a stable tightening force for a long period of time.

It is a perspective view explaining 1st Embodiment of the fastening band of this invention. It is a figure which expands and shows the A-A 'line cross section of FIG. It is a figure explaining the welding state of the spot welding of the band main body protrusion part and leverage board in the fastening band shown in FIG. It is a perspective view explaining 2nd Embodiment of the fastening band of this invention, (A) is the fragmentary perspective view, (B) is a perspective view of a lever board fixing member. It is a perspective view explaining 3rd Embodiment of the fastening band of this invention. It is a figure which expands and shows the B-B 'line cross section of FIG. It is a figure explaining 4th Embodiment of the fastening band of this invention, (A) is the front view, (B) is C-C 'sectional drawing of (A). It is a figure which shows the modification of the clamping band of FIG. It is a figure which shows the boots of the motor vehicle part which is a fastening object member fastened by this invention and the conventional fastening band. It is a perspective view which shows the conventional fastening band. It is a figure explaining the fastening operation | movement of the fastening band shown in FIG. 10, (A) is a figure which shows states, such as a lever board before a fastening operation | movement, and a band main body protrusion part, (B) is a lever board in the middle of a fastening operation | movement. It is a figure which shows states, such as a band main body protrusion part.

  Embodiments of the present invention will be described below. First, the first embodiment will be described with reference to FIGS.

  FIG. 1 is a view showing an embodiment of a boot fixing band 2A as a fastening band of the present invention. The shape and components of the boot fixing band 2A of this embodiment are the same as those of the conventional boot fixing band 2 described with reference to FIG. 10, and the same portions are denoted by the same reference numerals, and the description thereof is omitted or simplified. .

  The boot fixing band 2A of the present embodiment is different from the conventional one in that the inner and outer circumferences of the annular portion 21 of the metal member (in this embodiment, the band main body protruding portion 22, the lever plate 23, and the lever plate fixing member 24) That is, a fine pattern 25 (see FIG. 2) is formed so that irregularities are formed in the center of each plate surface. FIG. 2 is a cross-sectional view taken along line A-A ′ of the annular portion 21 of the band main body 20 in FIG. 1.

  The pattern 25 is formed by providing recesses on the plate surfaces of the entire band main body 20, the lever plate 23, and the lever plate fixing member 24 as well as the annular portion 21, as shown in FIG. 2. Moreover, the depth (difference in the height direction of the convex portion and the concave portion) W1 of the concave portion is set in a range of 2 μm to 50 μm from the plate surface of each component. In addition, it is preferable that the depth W1 of a recessed part shall be 1/10 or less of board thickness W2. Moreover, it is good also as 50 micrometers or more depending on a use. Incidentally, as shown in FIG. 10, this type of conventional boot fixing band 2 has a mirror-finished surface, and the surface roughness, that is, the unevenness of the surface is 0.5 μm or less. Since the depth of the pattern 25 formed in this embodiment is 2 μm to 50 μm from the plate surface, the degree of unevenness is 4 to 100 times larger than that of the plate surface. The texture becomes rough.

  As shown in FIG. 2, the pattern 25 is formed on the inner and outer circumferences of the plate surface and in the center in the width direction. In this embodiment, the width M1 of the pattern is 5 mm, the width M2 of the boot fixing band 2A is 7 mm, and the distance M3 between the end of the pattern and the end of the boot fixing band 2A is 1 mm on both sides. ing. The distance M3 is preferably in the range of 0.5 to 2 mm in terms of ease of forming the central pattern and ensuring a sufficient pattern area. In addition, the ratio of the pattern width M1 to the width M2 is preferably 50 to 95%, more preferably 60 to 90%, from the same viewpoint. Each part of the boot fixing band 2A, for example, as shown in FIG. 2, is provided with a chamfered portion 21b having a curved or linear slope by rubbing with a file or the like at the corners at both ends of the return portion 21. ing. The chamfered portion 21b is applied to all end portions, but may be applied to only a part thereof.

  The type of the pattern 25 formed on the inner and outer peripheries of the plate surfaces of the respective component parts is not limited to a predetermined one. For example, a linear recess such as a regular lattice pattern is provided in a mesh shape. It may be a flat, a plurality of linear recesses parallel to the axial direction, or an irregular curvilinear pattern. Furthermore, a pattern in which a large number of circular or square concave points are regularly or randomly formed may be used. In either case, as shown in FIG. The thickness of the convex portion is the same as the original thickness W2 of the band main body 20, the lever plate 23, and the lever plate fixing member 24.

  In addition, the pattern 25 needs to be a fine pattern. In particular, when spot welding is employed, the members to be welded are in a multipoint contact state (ideally in the spot diameter (diameter of about 2.0 mm)). It is desirable that the recess be formed so as to be in a contact state at several tens of points. A method for forming such a pattern 25 will be described later.

  As described above, in the boot fixing band 2A, when the lever plate 23 is spot-welded to the band main body protruding portion 22 by forming, for example, the pattern 25 as shown in FIG. As shown in FIG. 3, the portion 22 c is in a multipoint contact state. The same applies to the case where the lever plate fixing member 24 is spot welded to the annular portion 21 of the band main body 20.

  When spot welding is performed in such a multipoint contact state, welding is performed at each contact point, the reliability of welding is greatly improved, and the degree of production of defective products by welding can be greatly reduced. . That is, by using such multi-point contact, the current flowing between the electrodes 10a and 10b can be reduced, whereby the nugget layer 11 generated at the time of welding is compared with the case of conventional single-point contact. Unlikely, it does not occur intensively at one point and occurs evenly at each point, so that the nugget layer 11 does not penetrate deeply in the plate thickness direction.

  As a result, even if spot welding is performed on a thin plate of 0.3 mm to 0.8 mm, such as a component of the boot fixing band 2A, it is possible to prevent problems such as heat deterioration hardly occurring in each plate material and opening of holes, The reliability of welding can be improved.

  Further, by forming a pattern 25 as shown in FIG. 1 on the inner and outer circumferences of the annular portion 21 of the boot fixing band 2A, a margin can be given to the positioning accuracy of the lever plate 23. That is, as described above, the distance L1 (see FIG. 11) from the rear end portion 23b of the lever plate 23 to the upper end of the front end portion 22a of the band main body protruding portion 22 needs to be an appropriate distance. 1 is formed on each component of the boot fixing band 2A so that the rear end portion 23b of the lever plate 23 and the upper end of the front end portion 22a of the band main body protruding portion 22 are formed. The distance L1 is not required to be so precise. The fact that the distance L1 is not required to be so precise means that the welding position of the lever plate 23 with respect to the band main body protruding portion 22 does not need to be strictly determined.

  Thus, by providing the pattern 25, it is not necessary to strictly position the welding position of the lever plate 23 with respect to the band main body protruding portion 22 for the following reason.

  That is, the pattern 25 is formed on the inner and outer circumferences of the annular portion 21 of the boot fixing band 2A (in this case, in particular, the band main body 20), so that the surface area increases. The amount to return to the original when it hits. That is, until the yield point is reached, the width between the top dead center and the bottom dead center increases as the surface area increases. This means that until the yield point is reached, the width of the proof stress is wide, that is, the proof stress is improved, and thereby the range in which expansion and contraction is possible is widened. This is because the error of the position 23b can be absorbed.

  Thereby, the high precision is not required for positioning of the welding position when the lever plate 23 is welded to the band main body protruding portion 22. This is that the allowable range of the distance L1 from the rear end portion 23b of the lever plate 23 to the upper end of the band main body protruding portion 22 is widened. It is absorbed in the width of the proof stress.

  As described above, since high accuracy is not required for positioning of the welding position when the lever plate 23 is welded to the band main body protruding portion 22, workability can be greatly improved, and one kind can be produced in large quantities. This is advantageous not only in the case of production but also in the case of production in various small quantities. In addition, the number of defective products as a tightening band is reduced, and the range of expansion and contraction is expanded, so that the tightening failure when the tightening band is attached is also reduced.

  Furthermore, the strength of the band main body 20 is improved and the range of expansion and contraction is widened, so that a larger amount of tightening can be obtained, thereby adapting the boot fixing band 2A to the size of the diameter of the boot 1. There is also an advantage that the range can be widened. That is, a single type of boot fixing band 2A can cope with a plurality of types of boots having slightly different diameters at the portions to be mounted.

  Further, the boot fixing band 2A is excellent in production management by forming the pattern 25 as shown in FIG. 1 on the plate surface including the inner and outer circumferences of the annular portion 21. Various patterns can be used for this pattern 25, and if the pattern of the boot fixing band 2A is determined for each type of boot 1, the boot fixing band 2A is used for boots of which automobile manufacturer, and which vehicle type It is easy to manage production and inventory by knowing at a glance from the appearance which part of the boot is used for the vehicle, and which boot is used for a single automobile.

  There is also an advantage that the boot fixing band 2A itself can be reduced in weight. That is, since the pattern 25 formed by the boot fixing band 2A of this embodiment is realized by forming a concave groove with respect to the original thickness, the weight is reduced accordingly. Further, the pattern 25 also serves as an anti-slip, and when the lever plate 23 is tilted, it becomes difficult to slip due to an appropriate rough feeling, so that the tilting process is easy.

  In this embodiment, since the pattern 25 is formed on the inner and outer circumferences of the annular portion 21 of the band main body portion 20, after tightening the boot 1, the back surface of the annular main portion 21 in the band main body portion 20 (boot The pattern 25 of the portion 1 in contact with the outer peripheral surface 1a or 1b) also serves as an anti-slip, and thus has an advantage that tightening is not loosened even after long-term use under severe use conditions.

  Moreover, in this embodiment, since the pattern 25 is formed in the center part of the inner and outer circumferences of the annular portion 21 of the band main body part 20, that is, the pattern is not attached to both ends of the plate surface. The risk that the bulge protrudes from damaging the object to be tightened or the tightening band is cut off from the pattern can be avoided. Furthermore, since the pattern is not given to the both ends of the plate surface, rust is hardly generated.

  In addition, the pattern 25 mentioned above sets the groove depth of the pattern 25 and the fineness of the pattern 25 according to the material of the boot 1 using the boot fixing band 2A and the location where the boot 1 is used. Is desirable. This is because the frictional resistance and the electric resistance during spot welding differ depending on the depth and fineness of the groove of the pattern 25. The optimal groove of the pattern 25 depends on the material of the boot 1 and the usage conditions of the boot 1. It is desirable to set the depth of the pattern and the fineness of the pattern 25.

  Specifically, for a boot 1 made of a relatively hard material among plastic materials, a boot fixing band 2A in which a pattern 25 is formed by a fine and relatively shallow groove (2 μm to 10 μm); Doing so will give good results. Moreover, the pattern 25 of the groove | channel (5 micrometers-20 micrometers) whose comparatively fineness of a mesh is comparatively coarse and comparatively deep was formed with respect to the boot 1 produced | generated with a comparatively soft material of urethane type. Good results can be obtained by using the boot fixing band 2A. The boots 1 made of these plastic materials are used in a relatively loose tightened state because they are often used in automobile interiors and portions with low exposure, and are often used for low-speed rotating joints.

  On the other hand, the boot 1 made of a rubber material is often used under severe use conditions such as an axle that is exposed to the outside and rotates at a high speed, compared to the boot 1 made of a plastic material. The boot fixing band 2A used for such a boot 1 is required to have higher quality. The boot fixing band 2A used for such a boot 1 has, for example, a twill pattern as the pattern 25 and a deep groove (8 μm to 25 μm) pattern. Good results can be obtained.

  If tightening with a higher load is required, good results can be obtained if the depth of the groove is 2% to 6% of the thickness of the band body 20 with the pattern 25 of the hairline (hairline). I understood.

  Further, the boot fixing band 2A of this embodiment has almost no protrusion when the lever plate 23 is tilted and is fixed by the lever plate fixing member 24. One of the features is that it has a shape that draws a circle similar to the annular portion 21. In particular, when the boot fixing band 2A is used for tightening the boot 1 used for the joint part of the axle of the automobile, the boot 1 rotates at a high speed together with the axle so that the air resistance can be reduced as much as possible. The boot fixing band 2A is required to have less protrusion.

  Thus, the boot fixing band 2A described in this embodiment can greatly improve the manufacturing efficiency (about 30%) as compared with the conventional boot fixing band 2 of this type, The tightening stability can be improved more than twice, whereby the durability under severe use conditions can be greatly improved.

  In addition, the boot fixing band 2A greatly reduces the defect of spot welding, and it is possible to make the inspection in a conventional sampling inspection correspond to the sampling inspection. Moreover, since weight reduction is also achieved, when it uses for the motor vehicle utilized for dozens of places, it will contribute also to reduction of the total weight of a motor vehicle.

  By the way, such a pattern 25 is added to each component constituting the boot fixing band 2A, that is, a method of adding before forming the band main body portion 20, the lever plate 23, and the lever plate fixing member 24. There is a way to add. In consideration of production efficiency, it is preferable to form the parts at the stage of the plate material before making these parts. In addition, when forming a pattern with high precision in a center part, it is preferable to add a pattern after forming each member.

  Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is a partial modification of the first embodiment, and will be described mainly with respect to different portions.

  As shown in FIG. 4, in the second embodiment, the lever plate 23 is a lever plate 23 </ b> A having a shape that can be easily tilted, or a lever plate fixing member 24 </ b> A having a longer lever plate fixing member 24. The non-contact portion S that does not come into contact with the boot 1 shown in FIG. The lever plate 23A shown in FIG. 4 is provided with a protruding portion 41 at the upper end thereof for preventing the slipping of a finger protruding in the thickness direction. Further, the lever plate fixing member 24A has a long tongue-like long tongue-shaped portion 42 arranged so as to cover the non-contact portion S shown in FIG. 11B, and when pressing the lever plate 23A. Inwardly projecting dowels 43, 43 for facilitating the pressing are provided on the projecting piece portions 24a, 24b, respectively. The projecting piece portions 24a and 24b are not installed at opposite symmetrical positions, but are arranged so as to be displaced in the circumferential direction, and are arranged at positions where they do not overlap each other when bent.

  Further, the pattern 25 formed on the band main body 20 is formed as follows. That is, the band main body protruding portion 22 is a pattern 25 having a diamond pattern in which a plurality of lines parallel to the width direction are drawn, and the annular portion 21 is a rhombus mesh shape in which straight lines intersect diagonally (each mesh is a rhombus). Pattern 25. Further, the pattern 25 of the lever plate 23A and the lever plate fixing member 24A is a rhombus mesh pattern 25. The pattern 25 formed on each plate surface is not limited to one type as in the embodiment shown in FIG. 1, or two types as shown in FIG. It is good also as above. In this case, it is preferable that the pattern 25 is different for each member, but two or more types of patterns 25 may be formed in one member.

  Next, a third embodiment of the present invention will be described with reference to FIGS. Unlike the first embodiment, the third embodiment is not fixed by welding after being tightened, but is fixed by hooking and caulking. The same parts and members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  The boot fixing band 2B of the present embodiment is a boot fixing band that does not have a leverage plate as shown in Patent Document 2, and includes engaging portions 26 and 27 and a tightening portion 28. The engagement portions 26 and 27 at both ends of the boot fixing band 2B are overlapped to form one ring. The engaging portion 26 which is one end is formed with a long hole 26a and two round holes 26b and 26c. The engaging portion 27 at the other end is formed with a long protrusion 27a that enters the elongated hole 26a and hemispherical protrusions 27b and 27c that respectively enter the two round holes 26b and 26c. The long protrusion 27a is elongated in the length direction of the annular portion 21, and after being inserted into the long hole 26a, it is caulked so as not to come out of the long hole 26a.

  The tightening portion 28 is a portion that reduces the diameter of the boot fixing band 2 </ b> B by being sandwiched by pliers or the like so that the slope portions 28 a on both sides thereof are pulled. As a result of reducing the diameter of the boot fixing band 2B, the boot fixing band 2B is tightened. Note that a narrow cover portion 27d that covers the space S is provided at the tip of the engagement portion 27. On the other hand, the cover portion 27d is located at a position opposite to the engagement portion 26 of the tightening portion 28. An engagement holding portion 26d is provided to hold the tip portion 27e having the narrowest width from both sides in the width direction and hold the position.

  A fine pattern 25 is formed so that irregularities are formed in the center of the inner and outer circumferences of the annular portion 21 (in this embodiment, both the front and back surfaces of the engaging portions 26 and 27 and the fastening portion 28). Yes. As shown in FIG. 6, this pattern 25 is formed of irregularities in which convex portions protrude from the flat portions at both ends in the width direction and concave portions are formed between the convex portions. In this embodiment, the height W3 from the flat portion at both ends to the tip of the convex portion is 50 μm, and the plate thickness of the flat portion is 0.5 mm. FIG. 6 is a cross-sectional view taken along line B-B ′ of the annular portion 21 of the band main body 20 in FIG. 5.

  The boot fixing band 2B is obtained by cutting the base material of the band main body portion 20 into a width for the band main body portion, and then, on the front and back of the plate surface, the plate surface is in the central portion excluding both ends. A pattern 25 having an uneven surface is formed in a band shape, and then the band body 20 is bent into a ring shape.

  In addition, after cutting the base material of the band main body portion 20 to the width for the band main body portion, the pattern 25 may be added immediately after cutting to the length of the band main body portion 20. In the embodiment, after the pattern 25 is added, it is cut to the length of the band main body 20. Further, in this embodiment, the engaging portions 26 and 27 and the tightening portion 28 are formed before the bending process. However, after the bending process is performed, the engaging portions 26 and 27 and the tightening portion 28 are connected. It may be formed.

  Next, a fourth embodiment of the present invention will be described with reference to FIGS. The tightening band 2C of the fourth embodiment is not a boot fixing band, but fixes other parts of the automobile, for example, an oil hose near the engine. In addition, the same code | symbol is attached | subjected to the same part and member as 1st Embodiment, and the description is abbreviate | omitted or simplified.

  The fastening band 2C has engaging portions 51 and 51 (one engaging portion 51 is hidden behind the other engaging portion 51 and cannot be seen in FIG. 7) at both ends of the band main body portion 20. An engaging portion 52 is provided in the central portion of the 20. The engaging portion 52 straddles the front end portion 56 of the screw 55, and then is connected to a similar annular portion 21 disposed behind the annular portion 21 in FIG. The engaged members 53 and 54 are engaged with the engaging portions 51 and 52, and the interval between the engaged members 53 and 54 is widened or narrowed by rotating the screw 55.

  A through hole is provided at substantially the center of the engaged member 53, and a screw is cut at a portion surrounding the through hole. A screw portion 57 is provided on the outer periphery excluding the tip portion 56 of the screw 55, and is screw-engaged with the through hole of the engaged member 53. The engaged member 53 is provided with through holes through which the tips of the engaging portions 51, 51 are inserted, on both sides of the through hole. A through hole is also provided in the approximate center of the engaged member 54, and the tip 56 of the screw 55 is inserted through the through hole. The inner diameter of the through hole of the engaged member 54 is slightly larger than the diameter of the distal end portion 56 and smaller than the diameter of the screw portion 57. For this reason, the engaged member 53 is configured to be sandwiched between the engaging portion 52 and the screw portion 57.

  When the screw 55 is rotated by a screwdriver or the like, as described above, the interval between the engaged members 53 and 54 increases or decreases. When the interval between the engaged members 53 and 54 is increased, the ring of the annular portion 21 is reduced and tightened. On the contrary, when the interval between the engaged members 53 and 54 becomes narrow, the ring of the annular portion 21 becomes large and tightening becomes loose.

  As shown in FIG. 7B, a pattern 25 made up of four convex portions 61 (in other words, four concave portions 62) arranged at equal intervals is formed on the cross section of the annular portion 21. That is, convex portions extending parallel to the axial direction (= length direction) on the inner and outer peripheries of the annular portion 21 (in this embodiment, the portion extending over the entire length from the annular portion 21 to the engaged portions 51 and 52 at both ends). 61 is formed.

  FIG. 8 shows a modification of the pattern 25 shown in FIG. FIG. 8A shows the case where the pattern 25 is formed by the uneven portions 63 arranged at equal intervals, and FIG. 8B shows the pattern 25 where the continuous uneven portion 64 is formed on the entire circumference. ing. FIG. 8C shows a case in which a pattern 25 is formed by providing concentric circles 65 centering on the axis as concave portions in parallel along the axial direction. The axial line refers to a line in which the center of the cross section of the annular portion 21 extends in the length direction. The circle 65 may be a convex portion instead of a concave portion.

  FIG. 8D shows a pattern 25 in which a linear recess 66 that spirally extends along the axis of the annular portion 21. The concave portion 66 may be a convex portion. Further, a plurality of linear concave portions 66 or convex portions extending in a spiral shape may be made parallel, or they may be crossed in the middle instead of being parallel. In addition, as shown in FIG. 8D, the pattern 25 shown in the cross section of FIG. 7B, FIG. 8A, and FIG. 8B is spirally extended in the axial direction. The pattern 25 may be formed.

  Each embodiment described above is a preferred example of the present invention, but the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. Is. For example, the fastening band may be other than the boot fixing band as in the fourth embodiment. That is, the present invention can be applied to all fastening bands that have an annular portion formed by bending an elongated metal member, reduce the diameter of the annular portion, and apply a fastening force to the member to be fastened. For example, the present invention can also be applied to fastening of a water pipe portion and a gas pipe portion, fastening of a cover member of a joint portion in a machine tool, and the like.

  Further, the pattern 25 may be formed only on one surface of the plate member 38, or the pattern 25 may be formed only in one place as viewed in the cross section of the circular cross-section member. Even such a member has an effect that the yield strength is improved and the range of expansion and contraction is widened as compared with a member having no pattern 25 at all. In particular, when the pattern 25 is configured to come to the inner peripheral portion of the annular portion 21, the rough portion comes into contact with the boot 1, and the anti-slip function also works.

  In each of the above-described embodiments, the pattern 25 is formed not only on the annular portion 21 but also on other portions and members. However, in the present invention, the pattern 25 may be present at least on the inner and outer circumferences of the annular portion 21. . In the case of a circular cross section, the inner and outer circumferences include those that are 180 degrees apart when there are two patterns and 120 degrees apart at equal intervals when there are three patterns. As described above, the inner and outer circumferences indicate that the pattern 25 is disposed on the outer half and the inner half when the member to be tightened is tightened, and that “the pattern is formed on the inner and outer circumferences”. .

  In addition, the metal member having a circular cross section includes an elliptical cross section and a cross section having a circular shape and a square shape. Furthermore, as the pattern 25, a plurality of linear patterns formed so as to be parallel to each other in the axial direction of the metal member, and a plurality of concentric circular patterns or spiral shapes provided so as to intersect the straight lines It may be combined with the pattern.

  According to the present invention, it is possible to obtain a tightening band that ensures slip prevention, improves the workability of attachment, and has a stable tightening force for a long period of time. As a result, it is suitable for attaching a boot of an automobile, and can be used for fastening other members in the automobile or other members other than those for automobiles.

1 Boot (member to be tightened)
2 Boot fixing band (tightening band)
20 Band body portion 21 Annular portion 21a Outer peripheral surface 22 of the annular portion Band body protrusion 22a Band body protrusion tip 22b Band body protrusion root 23 lever plate 23a lever plate tip 23b lever plate rear end 24 Lever plate fixing member 25

Claims (6)

In a tightening band that has an annular portion formed by bending an elongated metal member, reduces the diameter of the annular portion, and gives a tightening force to the member to be tightened.
A fastening band characterized in that a pattern is formed at least at the central portion excluding both end portions in the width direction on the inner and outer circumferences of the annular portion so that the surface of the metal member becomes an uneven surface. In a tightening band that has an annular portion formed by bending an elongated metal member, reduces the diameter of the annular portion, and gives a tightening force to the member to be tightened.
Both ends of the metal member have an engaging portion, and the engaging portion overlaps to form one ring,
A fastening band characterized in that a pattern is formed at least at the central portion excluding both end portions in the width direction on the inner and outer circumferences of the annular portion so that the surface of the metal member becomes an uneven surface. A band main body portion in which a band main body protrusion is formed by bending an elongated metal member to form an annular portion, and overlapping a predetermined length so that both end portions of the band-shaped elongate metal member are joined together, When it is fixed to the band main body protrusion of this band main body and when tightening the member to be tightened, an arc-shaped lever that gives a tightening force based on the lever principle, and this lever is superimposed on the band main body In a fastening band provided with a lever fixing member for fixing the tip of the lever to the two protrusions,
A fastening band characterized in that a pattern is formed at least at the central portion excluding both end portions in the width direction on the inner and outer circumferences of the annular portion so that the surface of the metal member becomes an uneven surface. In a tightening band that has an annular portion formed by bending an elongated metal member, reduces the diameter of the annular portion, and gives a tightening force to the member to be tightened.
A fastening band characterized in that at least one surface of the annular portion and a pattern in which the surface of the metal member becomes an uneven surface is formed in a central portion excluding both ends in the width direction. . The fastening band according to any one of claims 1 to 4,
The fastening band is characterized in that the pattern to be the uneven surface is formed by providing a plurality of linear recesses in parallel to each other in the axial direction of the metal member. The fastening band according to any one of claims 1 to 4,
The fastening band according to claim 1, wherein the metal member is a member having a circular cross section, and the recess has a depth of 2 μm or more and 1/10 or less of the diameter.

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