JP2006300127A - Fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastener capable of increasing workability for connecting a hose to a pipe member. <P>SOLUTION: This fastener 10 stops the extraction of the hose 1 and the pipe member 5 inserted therein from each other. The fastener comprises a fastening sleeve 20 fitted onto the hose 1 and engageable, in a locked state, with the pipe member 5 through an engagement means 11. The fastening sleeve 20 comprises a pressing part 28 pressing the hose 1 against the pipe member 5 in a sealed and locked state, by engaging it with the pipe member 5 through the engagement means. The engagement means 11 comprises an engagement projection 12A formed on the pipe member 5 and an engagement groove 22 formed in the fastening sleeve 20 and guiding both members relative to each other in the fastening direction by the rotation of the fastening sleeve 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stopper that prevents a hose and a piping member from coming off. The “piping member” in this specification includes a pipe and a tubular member similar to the pipe. In addition, the “hose” in the present specification includes a hose and a tube, and an elastic tubular member similar to them.

  A conventional hose clamp of this type is, for example, a hose clamp described in Patent Document 1. As shown in a perspective view of FIG. 11, the hose clamp of Patent Document 1 includes a tightening ring 101 bent in an annular shape, and a pair of standing up in a radial direction intersecting from both ends of the tightening ring 101. The grips 102A and 102B. When the diameter of the tightening ring 101 is reduced by the elastic restoring force, the hose (not shown) can be tightened, and when the pair of grips 102A and 102B are brought close to each other using the elastic deformation of the tightening ring 101, The diameter of the tightening ring 101 is increased. At the groove edge near one grip 102A of the guide groove 103 formed in the tightening ring 101, there is provided a locking portion 104 for detachably locking the other grip 102B, and a guide continuing from the locking portion 104. A guiding portion 105 that guides the other grip 102 </ b> B toward the opening 103 a of the guide groove 103 is provided at the groove edge of the groove 103.

Using the hose clamp of Patent Document 1, the work procedure for preventing the hose and the piping member from coming off is as follows.
The pair of grips 102A and 102B are gripped and approached by a pliers, and the other grip 102B is locked to the locking portion 104 of the one grip 102A, whereby the diameter of the tightening ring 101 is obtained.
Next, a hose (not shown) is inserted into the tightening ring 101 in a loosely fitted state, and a piping member (not shown) is densely inserted into the hose.
Next, the hose clamp is moved on the hose and positioned at the connection portion between the hose and the piping member.
Next, when the pair of grips 102A and 102B are gripped by the pliers and further approached, the other grip 102B is removed from the locking portion 104 of the one grip 102A. Thereby, since the diameter of the fastening ring 101 is reduced by the elastic restoring force, the hose is fastened to the piping member.

JP 2001-159491 A

  However, in the hose clamp described in Patent Document 1, the hose is inserted into the tightening ring 101 in a diameter-expanded state in a loose fit state when used. Therefore, when the piping member is densely inserted into the hose, the hose clamp moves carelessly on the hose. Therefore, it has been necessary to temporarily attach the hose clamp to the hose with tape or strings. Also, tapes, strings, and the like had to be removed after inserting the piping member into the hose. For this reason, there existed a problem that the connection workability of a hose and a piping member was impaired.

  The problem to be solved by the present invention is to provide a stopper capable of improving the connection workability between the hose and the piping member.

The above-described problem can be solved by a stopper having the gist of the configuration described in the claims.
That is, the stopper according to claim 1 of the claims is a stopper for preventing the hose and the piping member inserted in the hose from coming off from each other, and is fitted to the hose and attached to the piping member. A fastening sleeve is provided that can be engaged in a removal-prevented state via the engaging means. The tightening sleeve is provided with a pressing portion that presses the hose against the piping member in a sealed state by engaging the piping member with an engaging means.
If comprised in this way, after inserting a hose in a fastening sleeve and inserting a piping member relatively in the hose, a piping member and a fastening sleeve are engaged via an engagement means. Then, the hose and the piping member are connected to the piping member, and the hose is pressed against the piping member in the sealing state and the locking state by the pressing portion of the tightening sleeve.
When the hose is inserted into the tightening sleeve, the pressing portion of the tightening sleeve comes into contact with the hose using the elasticity of the hose, so that the tightening sleeve is temporarily attached to the hose. Become. Therefore, the operation of inserting the piping member into the hose can be easily performed without inadvertently moving the tightening sleeve on the hose, and the connection workability between the hose and the piping member can be improved.

According to a second aspect of the present invention, there is provided a stopper according to the first aspect, wherein the engaging means of the stopper according to the first aspect is provided on any one of the pipe member and the fastening sleeve. A mating protrusion and an engaging groove provided on the other member and relatively guiding the two members in the tightening direction by the rotation of the tightening sleeve.
If comprised in this way, the engagement protrusion and engagement groove which are engagement means will engage with rotation of a fastening sleeve, and will clamp both members (a piping member and a fastening sleeve) relatively ( At the same time, the hose can be pressed against the piping member in a sealed state and in a secured state by the pressing portion of the tightening sleeve. Therefore, the engagement of the piping member and the tightening sleeve by the engaging means and the pressing of the hose by the tightening sleeve can be performed at the same time, and the connection workability between the hose and the piping member can be improved.

According to a third aspect of the present invention, the stopper according to the second aspect is the stopper according to the second aspect, wherein the engagement protrusion is integrally formed on the one member, and the other member is provided with the engagement protrusion. The engaging groove is integrally formed.
If comprised in this way, it is not necessary to assemble the member which has an engagement protrusion in one member, or to assemble the member which has an engagement groove in the other member. For this reason, the number of parts and the assembly man-hour can be reduced.

  According to the fastener of the present invention, when the hose is inserted into the tightening sleeve, the tightening sleeve is temporarily attached to the hose, so that the tightening sleeve does not inadvertently move on the hose. The operation of inserting the piping member into the hose can be easily performed, and the connection workability between the hose and the piping member can be improved.

  Next, the best mode for carrying out the present invention will be described with reference to examples.

  Examples of the present invention will be described. A stopper 10 shown in an exploded perspective view in FIG. 1 prevents the hose 1 from coming off the pipe member 5. The hose 1 is made of rubber or resin, for example, and has a cylindrical shape having elasticity. Moreover, the pipe member 5 is integrally provided with a pipe main body portion 5a formed in a cylindrical tubular shape and a bulging portion 6 that bulges on the outer peripheral portion of the distal end portion which is a connection end portion of the pipe main body portion 5a. . The pipe body 5 a has an inner diameter slightly smaller than a predetermined dimension than the inner diameter of the hose 1 and an outer diameter slightly larger than the inner diameter of the hose 1. Moreover, the front-end | tip part of the pipe member 5 containing the bulging part 6 is formed in the taper shape which makes a taper shape toward a front-end | tip (refer FIG. 6). The pipe member 5 corresponds to a “piping member” in this specification.

As shown in FIG. 1, the stopper 10 includes a fastening sleeve 20. The fastening sleeve 20 is externally fitted to the hose 1 and is formed so as to be engageable with the pipe member 5 via an engaging means 11 in a removal-prevented state.
The engagement means 11 is an engagement protrusion 12 provided on the pipe member 5 and an engagement protrusion 12 provided on the fastening sleeve 20 and relatively guiding the members 5 and 20 in the fastening direction by the rotation of the fastening sleeve 20. It is comprised by the joint groove 22 (it mentions later). The pipe member 5 corresponds to “one member” in this specification. The fastening sleeve 20 corresponds to “the other member” in the present specification.

  The engaging protrusion 12 is provided on the outer peripheral surface of the pipe member 5 via a pedestal portion 13. The pedestal portion 13 is integrally formed on the outer peripheral surface separated by a predetermined amount from the tip of the pipe member 5. The pedestal portion 13 includes a pair of front and rear flange portions 14 and 15 and a predetermined number of rib portions 16 (in the present embodiment, four are shown). Both the front and rear flange portions 14 and 15 project in an annular shape on the outer peripheral surface of the pipe member 5 and in parallel with each other at a predetermined interval. Further, each rib portion 16 connects the flange portions 14 and 15 to each other, and protrudes radially on the outer peripheral surface of the pipe member 5 at a predetermined interval (in this embodiment, 90 ° interval). . The front flange portion 14 and each rib portion 16 are formed with substantially the same amount of protrusion with respect to the outer peripheral surface of the pipe member 5. The rear flange portion 15 is formed with an outer diameter that is a predetermined amount larger than the outer diameter of the front flange portion 14 (see FIG. 6). The pedestal portion 13 reinforces the pipe member 5 and the engagement protrusion 12.

  Thus, the engagement protrusion 12 protrudes in a substantially cylindrical shape on a total of four intersections between the front flange portion 14 and each rib portion 16 (see FIGS. 1 and 7). In addition, the front end surface of the engagement protrusion 12 is formed so as to be positioned on an outer diameter slightly smaller than the outer diameter of the rear flange portion 15 (see FIG. 6).

  As shown in FIG. 1, the fastening sleeve 20 is formed mainly of a sleeve body 20a formed in a substantially cylindrical shape. The sleeve main body 20a is formed with an inner diameter that can be fitted onto the flange portion 14 and each rib portion 16 on the front side of the pedestal portion 13 almost closely. The sleeve body 20a is formed with an outer diameter that is slightly larger than the outer diameter at which the distal end surface of each engaging projection 12 is located. In addition, the number of engagement grooves 22 corresponding to each of the engagement protrusions 12 (four in this embodiment) is formed at one end of the sleeve body 20a (the right end in FIG. 1). Yes. For convenience of explanation, in the fastening sleeve 20, the engagement groove 22 side is referred to as a front side, and the opposite side is referred to as a rear side.

  As shown in FIG. 7, the engaging groove 22 is formed in a substantially L shape with a groove width slightly larger than the outer diameter of the engaging protrusion 12. The engagement groove 22 includes a protrusion introduction portion 23 extending axially rearward from the front end surface of the sleeve body 20a, and rearward (leftward in FIG. 7) from the rear end portion of the protrusion introduction portion 23 and in the circumferential direction (for example, tightening). A tightening portion 24 that inclines in a clockwise direction when the attached sleeve 20 is viewed from the front side thereof, and a circumferential direction from the rear end portion of the tightening portion 24 (for example, right when the tightening sleeve 20 is viewed from the front side). And a protrusion holding portion 25 extending in the rotation direction). The protrusion introduction part 23 is formed with a length of about 2 to 3 times the outer diameter of the engagement protrusion 12, for example. Further, the tightening portion 24 is formed with a length of about 3 to 4 times the outer diameter of the engagement protrusion 12, for example. Further, the tightening portion 24 is formed on a straight line 24L that forms an inclination angle θ of about 60 ° with respect to the axis 23L of the protrusion introducing portion 23, for example. Moreover, the protrusion holding | maintenance part 25 is formed with the length about 1 to 2 times the outer diameter of the engagement protrusion 12, for example. Further, the engagement position of the engagement protrusion 12 in the protrusion holding part 25 is set to a position shifted by about 30 to 40 ° with respect to the protrusion introduction part 23. Further, a retaining protrusion 26 projects from the front groove wall surface 25 a on the tightening portion 24 side of the protrusion holding portion 25. The retaining protrusion 26 protrudes so as not to prevent the engagement protrusion 12 from passing from the tightening portion 24 to the protrusion holding portion 25.

  As shown in FIG. 1, an annular reinforcing ring portion 27 that is continuous in the circumferential direction is provided on the outer peripheral portion of the front end portion of the sleeve main body 20a. The reinforcing ring portion 27 connects the outer peripheral surface side of the opening end portion of the engagement groove 22, and restricts the opening end portion of the engagement groove 22 from being inadvertently expanded and deformed. The reinforcing ring portion 27 is formed with an inner diameter that is smaller than the outer diameter of the sleeve body 20a and does not prevent the engagement protrusion 12 from passing through the protrusion introduction portion 23 of the engagement groove 22. Thereby, since the thickness of the reinforcing ring portion 27 in the radial direction can be increased, the reinforcing ring portion 27 can be strengthened without increasing the outer diameter of the reinforcing ring portion 27 unnecessarily.

  As shown in FIG. 6, a pressing portion 28 that is tapered toward the rear end is formed at the rear end of the sleeve body 20a. The cross section of the tip portion of the pressing portion 28 is formed in a semicircular shape. The pressing portion 28 is formed with a minimum inner diameter that is smaller than the outer diameter of the hose 1 in a state where the pipe member 5 is inserted and larger than the maximum outer diameter of the bulging portion 6 of the pipe member 5. Further, the pressing portion 28 is in a state in which the front end portion of the sleeve main body 20a is fitted to the flange portion 14 and the rib portions 16 on the front side of the pedestal portion 13 so as to be fitted to the bulging portion 6 of the pipe member 5. Thus, the portion of the hose 1 is formed so as to be tightened so as to be crushed by utilizing its elastic deformation. That is, the distance L between the pressing portion 28 of the tightening sleeve 20 and the bulging portion 6 of the pipe member 5 when the hose 1 is tightened by the tightening sleeve 20 is smaller than the wall thickness 1t of the hose 1 by a predetermined amount. Is set to The pipe member 5 and the fastening sleeve 20 are made of resin having a predetermined rigidity.

Then, the connection procedure which connects the hose 1 to the said pipe member 5 is demonstrated.
First, as shown in FIG. 2, the hose 1 is inserted into the fastening sleeve 20, and the connection end 1 a of the hose 1 is exposed to the front of the fastening sleeve 20. At this time, the pressing portion 28 of the tightening sleeve 20 is elastically deformed so as to lightly squeeze the portion of the hose 1, whereby the tightening sleeve 20 is temporarily attached to the hose 1.
Next, as shown in FIG. 3, the distal end portion of the pipe member 5 is press-fitted into the connection end portion 1 a of the hose 1 using the elastic deformation of the hose 1. At this time, the end surface of the connection end 1 a of the hose 1 is brought close to or brought into contact with the flange portion 14 on the front side of the base portion 13 of the pipe member 5.

Next, as shown in FIG. 4, the fastening sleeve 20 is moved on the hose 1 toward the pedestal portion 13 of the pipe member 5, and the protrusion introducing portion 23 ( 7 is engaged with each engagement protrusion 12 (see the two-dot chain line 12 (1) in FIG. 7).
Subsequently, when the tightening sleeve 20 is rotated clockwise toward the pipe member 5, each engagement protrusion 12 is moved from the protrusion introduction portion 23 of each engagement groove 22 of the tightening sleeve 20 to the tightening portion 24. And relatively moving the tightening portion 24 (refer to the two-dot chain line 12 (2) in FIG. 7). As a result, the tightening sleeve 20 is tightened while being pulled toward the pedestal portion 13 of the pipe member 5, and the front end portion of the tightening sleeve 20 is externally fitted to the front flange portion 14 and each rib portion 16 of the pedestal portion 13. It is fitted in a shape. Accordingly, the pressing portion 28 of the tightening sleeve 20 is tightened to the bulging portion 6 of the pipe member 5 so as to crush the portion of the hose 1, so that the hose 1 is sealed to the pipe member 5 and is prevented from being removed. (See FIG. 5).

Further, when the fastening sleeve 20 is rotated in the clockwise direction toward the pipe member 5, each engagement projection 12 is relative to the projection holding portion 25 from the tightening portion 24 of the engagement groove 22 of the fastening sleeve 20. (See FIG. 5). Then, with the elastic restoring force of the hose 1, each engagement protrusion 12 is held in contact with the groove wall surface 25 a on the front side of the protrusion holding portion 25 in each engagement groove 22 (in FIG. 7, a two-dot chain line). 12 (3)). At the same time, the relative protrusion of each engaging protrusion 12 toward the tightening portion 24 is restricted by the retaining protrusion 26 protruding from the groove wall surface 25a on the front side of the protrusion holding portion 25 in each engaging groove 22. . For this reason, inadvertent detachment of the fastening sleeve 20 can be prevented or reduced.
As described above, the connection work for connecting the hose 1 to the pipe member 5 is completed. In addition, what is necessary is just to perform the operation | work reverse to the said connection operation | work, when removing the hose 1 from the pipe member 5. FIG.

According to the above-described stopper 10, the hose 1 is inserted into the fastening sleeve 20, the pipe member 5 is relatively inserted into the hose 1, and then the pipe member 5 and the fastening sleeve 20 are engaged with each other. It engages via the engaging protrusion 12 and the engaging groove 22 (refer FIG. 5). As a result, the hose 1 and the pipe member 5 are connected in the retaining state, and the hose 1 is pressed against the bulging portion 6 of the pipe member 5 in the sealed state and in the retaining state by the pressing portion 28 of the fastening sleeve 20. (See FIG. 6).
Further, when the hose 1 is inserted into the tightening sleeve 20, the pressing portion 28 of the tightening sleeve 20 contacts the hose 1 using the elasticity of the hose 1, so that the tightening sleeve 20 is hose. 1 (see FIG. 2). Therefore, the operation of inserting the pipe member 5 into the hose 1 can be easily performed without inadvertently moving the fastening sleeve 20 on the hose 1, and the connection workability between the hose 1 and the pipe member 5 can be improved. Can be improved.

  In addition, the engaging protrusion 12 as the engaging means 11 and the engaging groove 22 are engaged with each other by the rotation of the tightening sleeve 20, so that both members (the pipe member 5 and the tightening sleeve 20) are relatively moved. While tightening (so-called drawing), the hose 1 can be pressed against the pipe member 5 in a sealed state and in a retaining state by the pressing portion 28 of the tightening sleeve 20 (see FIG. 5). Therefore, the engagement of the pipe member 5 and the fastening sleeve 20 by the engaging means 11 and the pressing of the hose 1 by the fastening sleeve 20 can be performed at the same time, and the connection workability between the hose 1 and the pipe member 5 is improved. Can be improved.

  Further, the engagement protrusion 12 is formed integrally with the pipe member 5, and the engagement groove 22 is formed integrally with the tightening sleeve 20 (see FIG. 1). Therefore, it is not necessary to assemble a member having the engagement protrusion 12 to the pipe member 5 or assemble a member having the engagement groove 22 to the fastening sleeve 20. For this reason, the number of parts and the assembly man-hour can be reduced.

  Further, since the pipe member 5 having the engagement protrusion 12 and the fastening sleeve 20 having the engagement groove 22 are both made of resin, it is expected that any one of the members 5 and 20 is made of steel. Rust generation can be avoided. Note that at least one of the pipe member 5 having the engagement protrusion 12 and the fastening sleeve 20 having the engagement groove 22 may be made of metal.

  Further, it is only necessary to rotate the fastening sleeve 20 by about 30 to 40 ° with respect to the pipe member 5, and an operation force in the axial direction for pressing in the axial direction of the pipe member 5 is not required, thereby improving workability. can do. The rotation angle of the fastening sleeve 20 can be selected as appropriate, but it is desirable to improve workability by making it less than one rotation.

Further, in the conventional hose clamp (see FIG. 11), the seal against the hose is a face seal by the fastening ring 101, whereas in the stopper 10 of this embodiment, the seal against the hose 1 is pressed against the fastening sleeve 20. Since the line seal is formed by the portion 28, the force required for the seal is small.
Further, when the hose 1 and the pipe member 5 are connected, the projections projecting outward in the radial direction in the fastening sleeve 20 and the pedestal portion 13 like the grips 102A and 102B of the conventional hose clamp (see FIG. 11). There is almost nothing (see FIG. 5). For this reason, it can be used for the connection between the hose 1 and the pipe member 5 in a narrow space.

Further, the engaging means 11 can be appropriately changed as shown in the following first to third modifications.
[Modification 1]
As shown in FIG. 8, a wedge-shaped engagement protrusion 12A is provided on the pedestal portion 13 of the pipe member 5 in place of the engagement protrusion 12 (see FIG. 1) of the above embodiment. Further, a split groove or the like is formed in the front end portion of the tightening sleeve 20, and the front end portion is formed so as to be able to bend and deform in the diameter increasing direction (see a two-dot chain line 20b in FIG. 8). Instead of the engagement groove 22 (see FIG. 1) of the above-described embodiment, an engagement hole 22A that can be engaged with the engagement protrusion 12A is provided at the front end of the fastening sleeve 20. Then, by pressing the fastening sleeve 20 against the pipe member 5 in the axial direction, the engagement protrusion 12A and the engagement hole 22A are engaged by utilizing the bending deformation of the front end portion of the fastening sleeve 20. The engagement protrusion 12A and the engagement hole 22A constitute the engagement means 11A.

[Modification 2]
As shown in FIG. 9, an uneven surface 12 </ b> B having a corrugated cross section is provided on the pedestal portion 13 of the pipe member 5 instead of the engaging protrusion 12 (see FIG. 1) of the above embodiment. Further, in place of the engaging groove 22 (see FIG. 1) of the embodiment, an uneven surface 22B having a corrugated surface corresponding to the uneven surface 12B is provided on the inner peripheral surface of the front end portion of the fastening sleeve 20. By pressing the tightening sleeve 20 against the pipe member 5 in the axial direction, the uneven surface 12B of the pipe member 5 is relatively pressed into the uneven surface 22B of the tightening sleeve 20. The uneven surface 12B and the uneven surface 22B constitute the engaging means 11B.

[Modification 3]
As shown in FIG. 10, the engagement groove 22 (see FIG. 7) of the tightening sleeve 20 in the above embodiment is tightened as an L-shaped engagement groove 22 </ b> C composed of the protrusion introduction part 23 and the protrusion holding part 25. The insert 24 is omitted.

  The present invention is not limited to the above-described embodiments, and modifications can be made without departing from the gist of the present invention. For example, the engagement protrusion 12 of the pipe member 5 and the engagement groove 22 of the tightening sleeve 20 in the above-described embodiment are reversely arranged, that is, the engagement groove 22 is provided in the pipe member 5 and the engagement protrusion 12A is provided on the tightening sleeve 20. Can be provided. Moreover, in the said Example, although the base part 13 which has the engagement protrusion 12 was integrally formed in the pipe member 5, the base part 13 which has the engagement protrusion 12 was formed separately from the pipe member 5, and this was made into the pipe member. 5 can be assembled.

It is a disassembled perspective view which shows the fastener concerning the Example of this invention. It is a side view which shows the state which inserted the hose relatively in the clamping sleeve. It is a side view which shows the state which inserted the piping member relatively in the hose. It is a side view which shows the process in which a fastening sleeve is engaged with a piping member. It is a side view which shows the state which engaged the clamping sleeve with the piping member. It is a sectional side view which shows the state which engaged the fastening sleeve with the piping member. It is explanatory drawing which shows an engaging means. It is explanatory drawing which shows the example of a change of an engaging means. It is explanatory drawing which shows the example of a change of an engaging means. It is explanatory drawing which shows the example of a change of an engaging means. It is a perspective view which shows an example of the conventional hose clamp.

Explanation of symbols

1 Hose 5 Pipe member (Piping member)
DESCRIPTION OF SYMBOLS 10 Stopper 11 Engagement means 12 Engagement protrusion (a part of engagement means)
12A engagement protrusion (part of engagement means)
12B Uneven surface (part of engaging means)
20 Tightening sleeve 22 Engaging groove (part of engaging means)
22A engagement hole (part of engagement means)
22B Uneven surface (part of engaging means)
22C engagement groove (part of engagement means)
28 Pressing part

Claims (3)

A stopper for preventing the hose and the piping member inserted in the hose from coming off,
A fastening sleeve that is externally fitted to the hose and is engageable with the piping member in a retaining state via an engaging means;
The tightening sleeve is provided with a pressing portion that presses the hose in a sealed state and a retaining state by engaging the piping member via an engaging means. Stopper to do. The stop device according to claim 1,
The engaging means includes an engaging protrusion provided on one of the pipe member and the fastening sleeve, and a relative rotation of the two members provided on the other member by rotation of the fastening sleeve. A stopper characterized by comprising an engaging groove for guiding in a tightening direction. The stop device according to claim 2,
A stopper according to claim 1, wherein the engaging protrusion is integrally formed on the one member, and the engaging groove is integrally formed on the other member.

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