JP4592437B2 - Anti-vibration clamp manufacturing method - Google Patents

Description

The present invention relates to a vibration isolating clamp manufacturing method for holding the pipe.

  2. Description of the Related Art Conventionally, as an anti-vibration clamp for holding a pipe, for example, as disclosed in Patent Document 1, a part that holds a pipe made of an elastic body is known. The anti-vibration clamp disclosed in Patent Document 1 has a plurality of axially long protrusions formed on the inner peripheral surface of a substantially cylindrical elastic body disposed in a clamp body made of a resin material. The piping is protected by the elastic body, and the protruding portion prevents the piping from slipping to increase the holding force of the piping.

On the other hand, there is also known a structure in which the protruding length of the protruding portion provided on the inner peripheral surface of the elastic body is increased to absorb the vibration generated in the pipe. For example, in the one disclosed in Patent Document 2, a substantially cylindrical elastic body is disposed concentrically on the inner peripheral side of a substantially cylindrical outer frame made of a resin material. A substantially trapezoidal protruding portion is formed on the peripheral surface in a radial cross-sectional view protruding inward in the radial direction and in the axial direction. Thus, when the pipe is held by the elastic body, the surface of the protrusion on the inner side abuts on the outer peripheral surface of the pipe to support the pipe. Absorbed by elastic deformation in direction.
JP 2002-195457 A JP 2003-106479 A

  However, in the anti-vibration clamps disclosed in Patent Documents 1 and 2, since the elastic body and the member for fixing the elastic body are made of different materials, each of them needs to be formed separately, and the manufacturing cost is low. It was such a thing. Further, like the anti-vibration clamp disclosed in Patent Document 2, by forming a substantially trapezoidal protrusion in a cross-sectional view on the inner peripheral surface of the elastic body, vibration of the pipe is to some extent, Although it can absorb, since the protruding portion made of an elastic body also has rigidity in the height direction, the protruding portion is not so elastically deformed, and the structure of the pipe cannot be sufficiently absorbed.

  The present invention has been made in view of such various points, and an object of the present invention is to provide an anti-vibration clamp having a holding portion that holds a pipe through the insertion hole, and has an inner peripheral surface of the insertion hole. An object of the present invention is to provide an inexpensive anti-vibration clamp capable of effectively reducing vibration of piping by contriving the structure of the formed protrusion.

The invention 請 Motomeko 1, a holding portion for holding a pipe made of an elastic body formed integrally, the holding portion have been insertion hole is inserted in the pipe forming, the insertion The present invention relates to a method for manufacturing an anti-vibration clamp in which a plurality of projecting portions projecting radially inward are formed on substantially the entire circumference of the hole so as to hold the pipe in a loosely fitted state. Specifically, the present invention is directed to a method for manufacturing an anti-vibration clamp that includes a plurality of holding portions that respectively hold a plurality of pipes in insertion holes.

  Then, at least two locations on the outer peripheral surface are each formed with a ring member having a plurality of protruding portions that protrude outwardly over a predetermined range in the circumferential direction, and the ring member is The outer peripheral surface is turned over so as to be located on the inner peripheral side, and the non-forming portions of the protruding portions are overlapped so that the insertion hole is formed surrounded by the forming portions of the protruding portions.

By this method, after providing a plurality of protrusions at at least two locations on the outer peripheral surface of the ring member, the ring member is turned over so that the outer peripheral surface is located on the inner peripheral side, surrounded by such insertion hole is formed, by overlapping the non-formation region between the protruding portions, antivibration clamp in which a plurality of protrusions are formed on the peripheral surface of the insertion hole is obtained. In addition, by forming the protrusions on the outer peripheral surface of the ring member as described above, the formation of the protrusions can be facilitated, and the cross-sectional shape of the protrusions can be made thin and long in a cross-sectional view. This makes it possible to more effectively absorb the vibration of the piping.

That is, when an attempt is made to integrally form a plurality of protrusions that can hold the pipe in a loose-fitting state on the inner peripheral surface of the insertion hole, the interval between the protrusions becomes relatively narrow in the insertion hole, which occurs during molding. Due to the influence of burrs or the like, there is a possibility that the function of the protruding portion that holds the pipe in a loosely fitted state cannot be secured. Therefore, as described above, the protrusion is integrally formed on the outer peripheral surface of the ring member in advance so that the interval between the plurality of protrusions is relatively wide, and the ring member is turned over after forming, so that the insertion hole is inward. The projecting portion extending toward the top can be formed without impairing its function. In other words, it is possible to integrally form a ring member collision detecting portion is formed of an elastic material, which makes it possible to obtain a vibration-proof clamp that can effectively absorb vibrations of the pipe at a low cost.

  In addition, the said predetermined range means the range which forms the penetration hole of a holding | maintenance part when a ring member is turned over.

In the above-described method, a protruding portion that protrudes outward is provided on the outer peripheral surface of the non-forming portion of the protruding portion in the ring member, and the ring member is turned over so that the outer peripheral surface is located on the inner peripheral side. A through hole is provided in another non-formed part facing the protruding part, and after turning the ring member upside down, the protruding part is engaged with the through hole so that the non-formed parts are integrated with each other. Good (invention of claim 2 ). In this way, even when the ring member is turned over so that the outer peripheral surface thereof is located on the inner peripheral side, the non-formed portion of the protruding portion can be reliably and easily integrated by the engagement between the protruding portion and the through hole. Thus, the insertion hole can be reliably and easily formed by the projecting portion forming portion. In addition, by integrating the non-formed parts in this way, the inner periphery of the insertion hole can be urged radially inward, and the holding force of the pipe can be improved.

The invention of claim 3 is a method of manufacturing a vibration isolating clamp when the vibration isolating clamp is formed in a ring shape as a whole and the vibration isolating clamp cannot be formed by turning the ring member upside down as described above. That is, the present invention is directed to a method for manufacturing a ring-shaped vibration-proof clamp having a plurality of holding portions that respectively hold a plurality of pipes in insertion holes.

  And the 1st ring member in which a plurality of crevices were provided in the inner peripheral surface, and a plurality of projections were formed in each crevice is formed with an elastic body, and the outside diameter is larger than the inside diameter of the 1st ring member And a second ring member having a plurality of concave portions provided on the outer peripheral surface so as to correspond to the respective concave portions of the first ring member, and a plurality of protruding portions formed in the respective concave portions by an elastic body. Then, the second ring member is fitted inside the first ring member such that the corresponding recesses of the first and second ring members are combined to form the plurality of insertion holes. Shall.

  By this method, even when the vibration-proof clamp is formed in a ring shape, the first ring member is fitted inside the first ring member by fitting the second ring member having an outer diameter larger than the inner diameter of the first ring member. An insertion hole for holding the pipe is formed by the concave portion provided on the inner peripheral surface of the ring member and the concave portion provided on the outer peripheral surface of the second ring member. Can be easily obtained.

  Further, even when it is difficult to provide a projecting portion that can hold the pipe in a loosely fitted state over the entire circumference due to the influence of burrs or the like during molding, the insertion hole is formed 2. By providing a plurality of projecting portions in each of the two concave portions, molding by a mold is facilitated, and an insertion hole that can hold the pipe in a loosely fitted state can be easily formed.

  Furthermore, by fitting two ring members made of an elastic body, the circumferential surface of the insertion hole formed between the two is urged radially inward, so that the holding force of the pipe can be improved. it can.

As described above, according to the vibration-proof clamp manufactured by the manufacturing method according to the present invention, by forming the protruding portion on the peripheral surface of the insertion hole so that the pipe is held in the loosely-fitted state in the insertion hole. The vibration of the pipe can be effectively absorbed, and the manufacturing cost can be reduced by integrally forming the vibration-proof clamp with an elastic body. In particular, the protrusion is formed to be inclined to one side in the circumferential direction of the insertion hole so as to overlap with another adjacent protrusion, and the pipe is supported by the side surface thereof, so that the protrusion is deformed in the radial direction of the insertion hole. This makes it possible to more effectively reduce piping vibration. Further, when a plurality of the insertion holes are provided, the holding force of the pipe can be improved by making at least two axes of the insertion holes non-parallel.

  Further, the ring member is turned over so that the outer peripheral surface thereof is located on the inner peripheral side, and the vibration isolating clamp having the above-described configuration is formed, so that the peripheral surface of the insertion hole can easily absorb the vibration of the pipe. Long projections can be formed easily and reliably. Moreover, since the anti-vibration clamp of the above-mentioned structure is obtained only by turning over a ring member, manufacturing cost can be reduced.

  In such a vibration-proof clamp manufacturing method, when the ring member is turned upside down, the protrusions and through holes are provided in the respective non-formed parts so that the non-formed parts of the projecting parts are integrated with each other. By engaging the part with the through-hole, the forming parts can be integrated with each other reliably and easily, and the holding force of the pipe can be improved.

  Furthermore, when the vibration-proof clamp is formed in a substantially ring shape, the vibration-proof clamp is configured by fitting two ring members made of an elastic body, and a recess is provided in each of the two ring members. By forming insertion holes by these recesses, vibration-proof clamps made of an elastic body can be manufactured relatively easily, and by providing a plurality of protrusions on the inner peripheral surface of the recesses, the piping is loosely fitted It is possible to easily form an insertion hole that can be held by the above, and to effectively absorb vibration of the pipe.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the following description of the embodiment is merely illustrative in nature, and does not mean that the present invention, its application, or its use is limited.
(Embodiment 1)
<Overall configuration>
FIG. 1 shows a schematic configuration of a pipe clamp 1 (anti-vibration clamp) according to Embodiment 1 of the present invention. The pipe clamp 1 is integrally formed of an elastic material such as synthetic rubber, and has two insertion holes 2a and 2a so that two pipes can be held. That is, the pipe clamp 1 includes pipe holding parts 2 and 2 (holding parts) in which insertion holes 2a and 2a are respectively formed, and a connecting part 3 that connects the pipe holding parts 2 and 2 in detail. As will be described later, the member 1a is turned over so that the outer peripheral surface of the substantially ring-shaped member 1a is located on the inner peripheral side, and a part of the member 1a is overlapped so that the overlapped portion becomes the connection part 3 The both ends are formed to be the pipe holding portions 2 and 2.

  The pipe holding parts 2 and 2 are formed in a substantially cylindrical shape at both ends of the connecting part 3, and the insides are insertion holes 2 a and 2 a in which pipes are arranged. As shown in FIG. 2, the insertion holes 2a and 2a are arranged such that the interval between the opening ends thereof is narrower than the interval between the other opening ends, that is, the axes are not parallel to each other. It is formed so as to have a substantially C shape when viewed from above. In this way, by forming the insertion holes 2a and 2a in a substantially C shape, the pipe clamp 1 moves in the axial direction of the pipe with respect to the pipe disposed in the insertion holes 2a and 2a. Can be prevented. That is, the holding force of the pipe of the pipe clamp 1 can be improved.

  A plurality of projecting portions 2b, 2b,... Projecting inward over the entire circumference and extending in the axial direction are provided on the peripheral surfaces of the insertion holes 2a, 2a. These protrusions 2b, 2b,... Are formed so that the protrusion length is larger than the thickness and is inclined to one side in the circumferential direction of each insertion hole 2a so as to overlap the adjacent protrusion 2b. . Thus, as shown in FIG. 5, when the pipes 7, 7 are positioned in the insertion holes 2 a, 2 a, the side surfaces of the projecting portions 2 b, 2 b,. Since the pipes 7 and 7 are supported in contact with each other, the protrusions 2b, 2b,... Tend to be elastically deformed radially outward. A state in which the pipes 7 and 7 are held in the insertion holes 2a and 2a and are allowed to move to a certain degree in the direction perpendicular to the axis is referred to as a loose fitting state.

  As described above, the pipes 7 and 7 vibrate by supporting the pipes 7 and 7 by the side surfaces of the projecting portions 2b, 2b,... Formed so as to fall on one side in the circumferential direction of the insertion holes 2a and 2a. Even in this case, the movement can be sufficiently absorbed by the elastic deformation of the protrusions 2b, 2b,... Outward in the radial direction, and the vibration of the pipes 7, 7 can be effectively reduced.

  In FIG. 1, the extending directions of the projecting portions 2b and 2b are the same in the left and right pipe holding portions 2 and 2, but the present invention is not limited to this, and the protruding portions 2b and 2b may be formed to extend in different directions.

  The connecting portion 3 is provided with an engaging portion 4 for integrating a part of a ring member 1a (details will be described later) constituting the pipe clamp 1. As shown in FIGS. 3 and 4, the engaging portion 4 includes a protrusion 5 extending radially outward from the outer peripheral surface of the ring member 1a before turning over (FIG. 3), and the ring member. The ring member 1a includes a through hole 6 formed at a position facing the protrusion 5 in a state where the ring member 1a is turned over so that the outer peripheral surface of 1a is positioned on the inner peripheral side (FIG. 4). The protrusion 5 has an umbrella-shaped bulged portion 5a formed on the tip side, and the bulged portion 5a passes through the through hole 6 and is turned upside down at the outer peripheral surface of the ring member 1a. A part of the ring member 1a is integrated.

In addition, what is necessary is just to make the said protrusion 5 engage with another member, when fixing the said piping clamp 1 to another member. In this case, the protrusion 5 is formed so as to largely protrude outward from the outer peripheral surface in a state where the protrusion 5 is engaged with the outer peripheral surface of the ring member 1a after being turned upside down. The portion may be engaged with the other member.
<Manufacturing method>
Below, the manufacturing method of the said piping clamp 1 is demonstrated. This pipe clamp 1 turns a member (ring member) 1a formed in a substantially ring shape upside down so that the outer peripheral surface is located on the inner peripheral side, and engages the protrusion 5 of the engaging portion 4 with the through hole 6. Can be obtained.

  Specifically, first, as shown in FIG. 3, the ring member 1a is integrally formed of an elastic material such as synthetic rubber. That is, the ring member 1a has a pair of inwardly curved portions 1b and 1b (projection forming portions) that are curved inward, and a pair of outwardly curved portions 1c and 1c (projected) that are curved outward. A plurality of protrusions that are long in the axial direction on the outer peripheral surfaces of the inwardly curved portions 1b and 1b, respectively. The parts 2b, 2b,... Are integrally formed. The protrusions 2b, 2b,... Are formed to have a predetermined inclination with respect to the outer peripheral surface of the ring member 1a at predetermined intervals over a predetermined range of the outer periphery of the ring member 1a. The predetermined range is a range in which the through hole 2b can be configured with the ring member 1a turned upside down, and the predetermined inclination is such that the ring member 1a is turned over and the projecting portions 2b, 2b,. When it comes to be located in the inner peripheral side of 2b, it sets to the inclination which can hold piping 7 softly and can absorb vibration effectively.

  As described above, the ring member 1a is formed in a substantially bowl shape, that is, by providing the inwardly curved portions 1b and 1b that are curved inward, the outer peripheral surface of the ring member 1a has an inner circumference as described later. When turned upside down so as to be positioned on the side, the inwardly curved portions 1b, 1b reliably constitute the insertion holes 2a, 2a of the pipe clamp 1.

  The ring member 1a has a substantially umbrella-shaped bulging portion 5a on the outer peripheral surface between the inwardly curved portions 1b and 1b, that is, on the outer peripheral surface of the outer curved portion 1c curved outward. The protruding portion 5 is integrally formed with the ring member 1a, and a through hole 6 is formed in the other outwardly curved portion 1c facing the outwardly curved portion 1c provided with the protruding portion 5.

  Then, the ring member 1a formed as described above is turned over so that its outer peripheral surface is located on the inner peripheral side, and is in a state as shown in FIG. In this state, the pipes 7 and 7 are arranged inside the inwardly curved portions 1b and 1b that are turned over and curved outward, respectively. At this time, the protrusions 5 and the through holes 6 provided in the outwardly curved portions 1c and 1c are positioned at opposing positions, and therefore, by engaging the protrusions 5 with the through holes 6, The curved portions 1c and 1c are overlapped and integrated, and the pipes 7 and 7 are held as shown in FIG.

  As a result, the integrated outward curved portions 1c and 1c become the connecting portion 3 for connecting the pipe holding portions 2 and 2, and the inwardly curved portions 1b and 1b are pipes in which the insertion holes 2a and 2a are formed. The holding parts 2 and 2 are configured. A plurality of projecting portions 2b, 2b,... Formed on the inwardly curved portions 1b, 1b project inward from the peripheral surfaces of the insertion holes 2a, 2a, and have a predetermined amount with respect to the peripheral surface. Will have a slope. As described above, the anti-vibration clamp 1 is formed by turning the ring member 1a upside down so that the intervals between the plurality of protrusions 2b, 2b,... Formed on the respective peripheral surfaces of the insertion holes 2a, 2a are relatively large. Since the projections 2b, 2b,... Are integrated with each other by the burrs generated during molding, the function of the projections 2 can be reliably prevented from being hindered.

  As described above, in the present embodiment, a plurality of projecting portions 2b, 2b,... Projecting inward are formed on the peripheral surfaces of the insertion holes 2a, 2a of the pipe holding portions 2, 2, and these projecting portions 2b, 2b are formed. ,... Are positioned so as to overlap the adjacent projecting portions 2b, 2b, so that the outer peripheral surfaces of the pipes 7, 7 are supported by the side surfaces of the projecting portions 2b. The vibrations of the pipes 7 and 7 can be effectively absorbed by the elastic deformation of the projecting portions 2b that can be greatly deformed.

In addition, a plurality of projecting portions 2b, 2b,... Are formed on the outer peripheral surface of the ring member 1a, and the ring member 1a is turned over so that the outer peripheral surface is located on the inner peripheral side. , So that the projecting portions 2b, 2b,... Function normally without being affected by burrs or the like generated during molding, and the pipe clamp 1 can be integrally molded. 1 manufacturing cost can be reduced.
(Embodiment 2)
As shown in FIG. 6, the pipe clamp 11 according to the second embodiment is formed in a substantially square shape as a whole, and has three insertion holes 2 a, 2 a, 2 a so that three pipes can be held. Is provided. That is, it differs from the above-described first embodiment only in that three pipe holding portions are provided so that three pipes can be held. Therefore, the same parts are denoted by the same reference numerals and are different from the first embodiment. Only the part will be described in detail below.

  That is, as shown in FIG. 6, the pipe clamp 11 is integrally formed by connecting the three pipe holding parts 12, 12, 12 provided with the insertion holes 2a, 2a, 2a by the connecting parts 13, 13. As in the first embodiment, a plurality of protruding portions 2b, 2b,... Are provided on the peripheral surfaces of the insertion holes 2a, 2a, 2a, respectively. The connecting portions 13 and 13 are provided with engaging portions 4 and 4 having the same configuration as that of the first embodiment, respectively.

  The manufacturing method of the piping clamp 11 is different from the manufacturing method of the piping clamp 1 according to the first embodiment described above only in the shape of the ring member 11a to be molded first, and the outer peripheral surface of the ring member 11a is the inner periphery. Since it is the same in that the connecting portions 13 and 13 are formed by turning the ring member 11a upside down so as to be positioned on the side, the shape of the ring member 11a will be mainly described below. .

  The ring member 11a is integrally formed of an elastic material such as synthetic rubber, and as shown in FIG. 7, inwardly curved portions 11b, 11b, 11b, and 11b that curve inward and outwardly. The outward bulges 11c, 11c, 11c, and 11c that bulge out are formed so that they are alternately positioned, and the inwardly curved portions 11b and the outward bulges 11c face each other. . .. Are formed integrally on the outer peripheral surfaces of the inwardly curved portions 11b, 11b,..., Respectively, in the same way as in the first embodiment. The parts 2b, 2b,... Are formed to have a predetermined inclination with respect to the outer peripheral surface of the ring member 11a at a predetermined interval.

  Further, of the outward bulging portions 11c, 11c,..., The opposing outward bulging portions 11c, 11c are each formed with a substantially umbrella-shaped protruding portion 5 on one side and a through hole 6 on the other side. Has been.

  The ring member 11a having the above-described configuration is turned over so that the outer peripheral surface is located on the inner peripheral side, so that the piping in which the insertion holes 2a, 2a, 2a are formed by the inwardly curved portions 11b, 11b,. The holding portions 12, 12, and 12 are configured, and the connecting portions 13, 13, and 13 are configured by the outward bulging portions 11c, 11c,. And in the state which has arrange | positioned piping 7,7,7 in the insertion holes 2a, 2a, 2a comprised by the said inward bending part 11b, 11b, ..., it is in said outward bulging part 11c, 11c, ..., respectively. The protruding portions 5 provided are inserted into and engaged with the through holes 6 so that the outwardly bulged portions 11c, 11c,... Are integrated, and as shown in FIG. Will be held.

  As shown in FIG. 6, two inner curved portions 11b and 11b of the inner curved portions 11b, 11b,... The one side of the pipe holding part 12 is configured by combining the cuboidal parts 11b and 11b.

  As described above, in this embodiment, the pipe clamp 11 for holding the three pipes 7, 7, and 7 can be integrally formed of an elastic material, and the manufacturing cost can be reduced. Moreover, in this pipe clamp 11, as shown in FIG. 8, a plurality of protrusions 2b, 2b,... Provided on the peripheral surfaces of the insertion holes 2a, 2a, 2a so as to fall on one side in the circumferential direction. , 7, 7 are held in a loosely fitted state, so that vibrations of the pipes 7, 7, 7 can be effectively absorbed respectively.

  Further, as in the first embodiment, since the anti-vibration clamp 11 is formed by turning the ring member 11a upside down, the plurality of protrusions 2b, 2b,... Provided on the peripheral surfaces of the insertion holes 2a, 2a, 2a are: The pipes 7, 7,... Can be securely held in a loosely fitted state without being affected by burrs during molding.

In this embodiment, similarly to the first embodiment, when the pipe clamp 11 is fixed to another member, the protrusions 5 and 5 may be engaged with the other member. Further, as in the first embodiment, among the insertion holes 2a, 2a, 2a, the insertion holes 2a, 2a are formed so that the axes of at least two insertion holes 2a, 2a are non-parallel. The holding power can be improved.
(Embodiment 3)
As shown in FIG. 9, the pipe clamp 21 according to the third embodiment is formed in a substantially ring shape as a whole, and has five insertion holes 2a, 2a so as to hold five pipes 7, 7,. , ... are provided. In other words, the pipe clamp 21 is formed by connecting five pipe holding portions 22, 22,... Each having insertion holes 2 a, 2 a,. . Therefore, the pipe clamp 21 is not manufactured by turning the ring member upside down as in the first and second embodiments, but is assembled by combining the two ring members 24 and 25 as shown in FIG. It is done. Since the insertion holes 2a, 2a,... And the connecting portions 23, 23,... Are the same as those in the first and second embodiments, the same parts are denoted by the same reference numerals, and different parts are described. Only the details are described below.

  As shown in FIG. 10, the pipe clamp 21 has an outer ring member 24 (first ring member) and an outer diameter larger than the inner diameter of the outer ring member 24, and is concentrically inside the outer ring member 24. The ring members 24 and 25 are integrally formed of an elastic material such as synthetic rubber.

  On the inner peripheral side of the outer ring member 24, five semicircular recesses 24a, 24a,... Are provided in the circumferential direction, and the inner peripheral surface of each recess 24a is inwardly provided. A plurality of projecting portions 2b, 2b,. .. Are formed between the recesses 24a, 24a,... In the outer ring member 24. The through holes 6, 6,.

  On the other hand, substantially semicircular concave portions 25a, 25a,... Are provided on the outer peripheral side of the inner ring member 25 in the circumferential direction. A plurality of projecting portions 2b, 2b,. .. Are formed between the recesses 25a, 25a,... On the outer peripheral surface of the inner ring member 25, respectively.

  By fitting the inner ring member 25 having the above-described configuration inside the outer ring member 24, the recesses 25a, 25a,... Of the inner ring member 25 and the recesses 24a, 24a,. The insertion holes 2a, 2a,. At this time, the inner ring member 25 is fitted into the outer ring member 24 so that the pipes 7 are positioned in the respective insertion holes 2 a, and the protrusions 5, 5,... Provided on the outer peripheral surface of the inner ring member 25. Are engaged with through holes 6, 6,... Provided in the outer ring member 24, so that the pipe clamp 21 is in a state of holding five pipes 7, 7,. .

  The pipe clamp 21 may be used only for bundling a plurality of pipes 7, 7,..., Or other members may be fitted inside the substantially ring-shaped pipe clamp 21. You may make it fix to this member.

  As described above, according to the present embodiment, the entire pipe clamp 21 can be formed of an elastic material even if the number of the pipes 7, 7,... To be held increases, and the pipe clamp 21 includes two rings. Since it is formed by fitting the members 24 and 25, the manufacturing cost can be reduced as compared with the conventional one. Further, by providing a plurality of projecting portions 2b, 2b,... Projecting inward on the circumferential surface of the insertion holes 2a, 2a,... Provided in the pipe clamp 21, the entire circumferential surface of the insertion hole 2a is provided. Compared to the case where a plurality of projecting portions 2b, 2b,... Are formed over the circumference, the occurrence of burrs and the like is reduced, and molding is facilitated, so that the pipes 7, 7,. The holes 2a, 2a,... Can be easily formed. And since the piping 7,7, ... is hold | maintained in the loose-fit state by the said protrusions 2b, 2b, ... like the above-mentioned Embodiment 1, 2, the vibration of this piping 7,7, ... is each effective. Can be absorbed into.

  Further, since the anti-vibration clamp 21 is formed by fitting the two rings 24 and 25, the two rings 24 and 25 are more reliably integrated by the elastic restoring force, and the rings 24 and 25 are integrated. Since it is possible to apply a radially inward biasing force to the insertion hole 2a formed by the recesses 24a and 25a, the holding force of the pipe 7 in the insertion hole 2a can be further improved. Further, as in the first embodiment, if the insertion holes 2a, 2a are formed so that the axes of at least two insertion holes 2a, 2a are non-parallel among the insertion holes 2a, 2a,. The holding force can be further improved.

(Other embodiments)
The configuration of the present invention is not limited to the above embodiment, but includes various other configurations. That is, in each of the above embodiments, the protrusions 2b, 2b,... Are provided over the entire circumference of the insertion holes 2a, 2a,. The protruding portion 2b may be partially not provided so that only the supporting rigidity is reduced.

  In each of the above embodiments, a plurality of insertion holes 2a, 2a,... Are provided so as to hold a plurality of pipes 7, 7,. One may be sufficient. When only one insertion hole 2a is provided as described above, it is preferable to provide a connection portion with another member in one pipe holding portion without providing a connecting portion.

  Further, in the third embodiment, the pipe clamp 21 is configured to hold the five pipes 7, 7,..., But is not limited thereto. For example, four insertion holes 2a, 2a,. The four pipes 7, 7,... May be held, or six or more pipes 7, 7,. When holding four or more pipes 7, 7,..., Use a pipe clamp having a configuration in which the pipe holding part is connected in series by the connecting part as in the first and second embodiments. Also good.

It is a perspective view which shows the whole structure of the piping clamp which concerns on Embodiment 1 of this invention. It is the II-II sectional view taken on the line of FIG. It is a perspective view which shows the whole structure of the ring member integrally molded. It is a perspective view which shows the state which turned this ring member upside down so that the outer peripheral surface of a ring member may be located in an inner peripheral side. It is a perspective view which shows the state in which the piping clamp hold | maintained piping. It is a perspective view which shows the whole structure of the piping clamp which concerns on Embodiment 2. FIG. It is a perspective view which shows the whole structure of the ring member integrally molded. It is a perspective view which shows the state in which the piping clamp hold | maintained piping. It is a perspective view which shows the whole structure of the piping clamp which concerns on Embodiment 3. FIG. It is a perspective view which shows the whole structure of the outer side ring member and inner side ring member which comprise a piping clamp. It is a perspective view which shows the state in which the piping clamp hold | maintained piping.

1, 11, 21 Piping clamp (Anti-vibration clamp)
1a, 11a Ring members 1b, 11b Inwardly curved part (projection part forming part)
1c outward curved part (non-formation part of protrusion)
2, 12, 22 Piping holding part (holding part)
2a Insertion hole 2b Protruding part 3, 13, 23 Connecting part 4 Engaging part 5 Protruding part 6 Through hole 7 Piping 11c Outward bulging part (non-formation part of the projecting part)
24 Outer ring member (first ring member)
24a Recess 25 Inner ring member (second ring member)
25a recess

Claims (3)

A method of manufacturing an anti-vibration clamp comprising a plurality of holding portions for holding a plurality of pipes in respective insertion holes,
A ring member in which a plurality of protrusions protruding outwards over a predetermined range in the circumferential direction is formed in at least two places on the outer peripheral surface by an elastic body,
The ring member is turned over so that the outer peripheral surface thereof is located on the inner peripheral side, and the non-formed portions of the protruding portions are overlapped with each other so that the insertion hole is formed surrounded by the formed portions of the protruding portions. A method of manufacturing an anti-vibration clamp, characterized by combining them. In claim 1 ,
Protrusions projecting outward are provided on the outer peripheral surface of the non-formation portion of the projecting portion of the ring member, and the ring member is opposed to the projecting portion in a state where the outer peripheral surface is located on the inner peripheral side. Providing a through hole in another non-forming site to
After the ring member is turned over, the protrusion is engaged with the through-hole so that the non-formed parts are integrated with each other. A method of manufacturing a ring-shaped vibration-proof clamp having a plurality of holding portions for holding a plurality of pipes in insertion holes, respectively.
Forming a first ring member provided with a plurality of recesses on the inner peripheral surface and having a plurality of protrusions formed on each recess by an elastic body;
The first ring member has an outer diameter larger than the inner diameter, and is provided with a plurality of recesses on the outer peripheral surface so as to correspond to the recesses of the first ring member, and each of the recesses has a plurality of protrusions. Forming the formed second ring member with an elastic body;
Fitting the second ring member inside the first ring member such that the corresponding recesses of the first and second ring members are respectively combined to form the plurality of insertion holes. A method for manufacturing a vibration-proof clamp.

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