JP2009144809A - Clamp for pipe body joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp for a pipe body joint easily fixable to an installation surface, and capable of reducing even weight without concentrating stress on one point when installing a pipe body in a joint. <P>SOLUTION: This clamp is provided with right-left joint fixing frame parts 11 and a connecting part 12 integral with both frame parts 11. The connecting part 12 has a hollow part 15, an elastic claw 16 and a hole 17. The hollow part 15 is formed so that a bolt 4 projecting from the installation surface 3 can be inserted into a ceiling part 14 from a bottom part 13, and the claw 16 is formed so as to be engageable with a bolt screw part by extending by several pairs from opposed positions of the hollow part. The hole 17 is formed in the ceiling part 14 in a dimension for tightly inserting the bolt 4, and the connecting part 12 can be fixed to the installation surface 3 by work of being only pushed in the bolt 4 so that a bolt tip part penetrates through the bottom part 13, the hollow part 15 and the hole 17. Respective bottom surfaces 19 of both frame parts 11 are formed so as to contact with the installation surface 3 in a fixed state to the installation surface 3, and screw-fastening force when screw-fastening the pipe body to the joint 2, is supported at three points of both bottom surface parts 72 and 73 and a bolt support part 71. Both frame parts 11 and the connecting part 12 can be integrally molded by resin. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pipe joint clamp for fixing a plurality of pipe joints such as a hydraulic brake pipe in an automobile or the like to an automobile body or the like.

Conventionally, various proposals have been made regarding clamps for fixing a plurality of pipes to an automobile body or the like (see, for example, Patent Documents 1 to 4), but clamps for pipe joints for fixing a plurality of joints connecting pipes. There was no prior art document for this proposal.
FIG. 9 shows a general tube joint clamp of this type. As shown in FIG. 10, two joints (2WAY joints) 91, 91 are welded separately to the left and right ends of the metal bracket 92, and the through-hole 93 opened in the center of the metal bracket 92 A bolt 95 protruding from a mounting surface 94 such as an automobile body surface is passed, and a nut 96 is screwed (screwed) from the tip side.

Japanese Patent Laid-Open No. 10-332049 Japanese Patent Laid-Open No. 11-230415 JP 2002-5337 A JP 2006-234056 A

However, in the above prior art, the nut fastening operation for welding the two joints 91 and 91 to the metal bracket 92 and screwing the metal bracket 92 to the mounting surface 94 is troublesome, and the operation cost is increased.
Further, as shown in FIG. 11, the mounting surface 94 is supported at one point of the nut fastening portion 97 of the metal bracket 92, so that the pipe body (not shown) is screwed to the joint 91. The screw tightening moment (see arrow A) is supported at one point of the nut fastening portion 97, where stress concentration occurs. For this reason, the high holding force by structural members, such as the strong metal bracket 92, the volt | bolt 95, and the nut 96, was needed.
In particular, when the pipe body is a hydraulic brake pipe, a high pressure is applied to the pipe, and therefore the flare nut connected to the pipe is tightened with a high torque. For this reason, a high holding force by the constituent members is required, for example, sufficient metal bracket strength is required to prevent deformation by the screw tightening moment when the pipe is screwed.
Further, since a strong, that is, heavy metal bracket 92, bolt 95, nut 96, and the like are required, weight reduction cannot be achieved.

  The present invention has been made in view of the above circumstances, and can be fixed to the mounting surface very easily to reduce the work cost. Also, each component member has a high holding force when the tube is attached to the joint. Therefore, it is an object of the present invention to provide a clamp for a pipe joint that can be further reduced in weight.

The said subject is solved by making the clamp for pipe joints into the structure of each following aspect.
As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is merely for the purpose of facilitating the understanding of the present invention, and the technical features described in this specification and combinations thereof should not be construed as being limited to those described in the following sections. . In addition, when a plurality of items are described in one section, it is not always necessary to employ the plurality of items together, and it is also possible to take out only a part of the items and employ them.
Of the following items, (1) corresponds to claim 1 and (2) corresponds to claim 2.

(1) A clamp for a pipe joint comprising left and right joint fixing frame portions for fixing the joints, and a connecting portion located between the left and right joint fixing frame portions and integral with both joint fixing frame portions. The connecting portion has a hollow portion through which the screw shaft protruding from the clamp mounting surface is inserted from the bottom portion toward the ceiling portion, and a tip extending from the opposite position of the inner wall of the hollow portion toward the ceiling portion. And at least a pair of elastic locking claws engaged from both sides with the screw portion of the screw shaft inserted into the hollow portion, and the screw shaft provided in the ceiling portion and inserted into the hollow portion And an opposing surface portion for supporting the tip end side of the screw shaft that is inserted so as to sandwich the tip end portion of the screw shaft from both the left and right sides, and is positioned and fixed to the clamp mounting surface via the screw shaft. Of the joint fixing frame Tube fitting for clamping, wherein the bottom surface is formed to contact the clamp mounting surface.
(2) The pipe joint clamp according to (1), wherein the left and right joint fixing frame portions and the connecting portion are integrally formed of synthetic resin.

  According to the clamp for a pipe joint of the present invention, the fixing to the mounting surface can be extremely easily performed without welding or nut tightening, and the operation cost can be reduced. Further, when the pipe body is attached to the joint, the stress is not concentrated at one point, and therefore a high holding force is not required for each component member. Further, there is an effect that the weight can be reduced by forming the whole with a synthetic resin.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol shows the same or an equivalent part between each figure.
FIG. 1 is a perspective view showing one embodiment of a clamp for a pipe joint according to the present invention, FIG. 2 is a front view showing a main part of the clamp, and FIG. 3 is a schematic longitudinal sectional view of the clamp.
As shown in these drawings, the tube joint clamp 1 is positioned between the left and right joint fixing frame portions 11 for fixing the joint 2 and between the left and right joint fixing frame portions 11, that is, at the center portion in the left and right direction of the clamp. The right and left joint fixing frame portions 11 and the connecting portion 12 are provided.
In the present embodiment, the left and right joint fixing frame portions 11 and the connecting portion 12 are integrally formed by synthetic resin molding. Each joint 2 is fixed separately to the left and right joint fixing frame portions 11 by insert molding, press fitting, or the like.

A hollow portion 15, a locking claw 16 and a round hole 17 are formed in the connecting portion 12.
In this case, the hollow portion 15 has a screw shaft that protrudes perpendicularly from the automobile body surface (only part of which is shown) as the clamp mounting surface 3, here the stud bolt 4 is directed from the bottom portion 13 of the connecting portion 12 to the ceiling portion 14. So that it can be inserted.
The locking claws 16 are inclined and extended in the direction of the ceiling portion 14 of the connecting portion 12 from substantially opposite positions of the inner wall of the hollow portion 15, and the screw portions 4 a of the bolts 4 inserted into the hollow portion 15 on the left and right sides. Claws that bite between the threads from the side. In this way, the bolt 4 is positioned and held and retained by biting between the threads.
Each of the locking claws 16 is elastic and has at least one pair on the left and right sides. In the illustrated example, a total of six pairs of locking claws 16 are formed, three at each tip portion of the two pairs of arm portions 18.
The clamp 1 according to the present embodiment is mounted and fixed to the clamp mounting surface 3 by such a positioning and holding function of the bolt 4 by the locking claw 16 and a retaining function.

The round hole 17 is provided so as to penetrate the ceiling portion 14 of the connecting portion 12 and is inserted so as to sandwich the tip side portion of the stud bolt 4 inserted into the hollow portion 15 from at least the left and right sides, that is, in the left-right direction. An opposing surface portion for supporting the bolt tip side that allows almost no play (gap) is inserted.
The round hole 17 is a through hole in the present embodiment, but any shape, for example, a groove or a notch, can be used as long as the tip end portion of the stud bolt 4 penetrates in the left-right direction with little play. There may be.
Moreover, the stud bolt 4 may be located in the round hole 17 (between the opposed surface portions for supporting the bolt tip side) even if a part of the tip side is part. That is, only the tip end portion of the stud bolt 4 is located in the round hole 17, and the tip end portion may not be configured to protrude upward from the round hole 17.

  In addition, the bottom surface 19 of each of the left and right joint fixing frame portions 11 (the contact surface with the clamp mounting surface 3 corresponding to the joint fixing position) and the bottom surface 20 of the connecting portion 12 are clamped by the clamp 1 via the stud bolt 4. In a state of being fixedly positioned on the surface 3, it is formed so as to come into contact with the clamp mounting surface 3.

Next, a procedure for mounting and fixing the above-described tube joint clamp 1 to the mounting surface 3 and actions and effects of the clamp 1 will be described.
As shown in FIG. 4, in the present clamp 1, the joints 2 are fixed to the left and right joint fixing frame portions 11, respectively. In the illustrated example, the joint 2 is assembled and fixed to the joint fixing frame portion 11 by press fitting (see arrow A).
The clamp 1 to which the joint 2 is fixed is fixed by inserting a stud bolt 4 protruding vertically from the clamp mounting surface 3 from the bottom portion 13 of the connecting portion 12 toward the ceiling portion 14.

  Specifically, first, the clamp 1 to which the joint 2 is fixed is taken above the stud bolt 4. Next, the center (left and right) of the clamp 1 so that the tip (upper end) of the bolt 4 passes through the round hole 17 formed in the ceiling 14 of the connecting part 12 through the hollow part 15 from the bottom 13 of the connecting part 12. The portion is pushed into the stud bolt 4 portion (see arrow C in FIG. 4).

  At this time, the threaded portion 4a of the stud bolt 4 slides while receiving the pressure contact of the locking claw 16 whose tip is inclined and extended in the direction of the ceiling portion 14 from the left-right facing position of the inner wall of the hollow portion 15 of the connecting portion 12 ( Slidable). In the clamp 1, the tips of the locking claws 16 are on the left and right sides of the stud bolt screw portion 4 a in a state where the bottom surfaces 19 of the joint fixing frame portion 11 and the bottom surface 20 of the connecting portion 12 are in contact with the clamp mounting surface 3. From each of the screw threads to stand still. As a result, the stud bolt 4, that is, the clamp 1, is positioned and held in the front-rear and left-right directions (see FIGS. 1 to 3).

Since each locking claw 16 has a tip inclined and extended in the direction of the connecting portion 12 and has elasticity, it bites between the threads of the stud bolt screw portion 4a, so that the stud bolt 4 when the clamp 1 is pressed and fixed. The bolt 4 can be easily slid and moved in the insertion direction (the direction of arrow C in FIG. 4). However, it is difficult to move the stud bolt 4 in the reverse direction, and the stud bolt 4 (clamp 1) is prevented from being pulled out, in other words, the clamp 1 is positioned and held in the vertical direction.
That is, the clamp 1 according to the present embodiment can be fixed to the mounting surface 3 by a very simple method of so-called one-touch without requiring prior welding work and without using a fastener such as a nut or a tool such as a spanner. Work cost can be reduced.

A pipe body (flare nut) 5 such as a hydraulic brake pipe is screwed to the joint 2 attached to the joint fixing frame portion 11 of the clamp 1 fixed to the attachment surface 3 in this way.
FIG. 5 shows a state immediately before the pipe body 5 is attached and fixed to the joint 2, and FIG. 6 shows a state after the pipe body 5 is attached and fixed.
FIG. 7 is an explanatory view of the stress acting position when the pipe body 5 (see FIG. 6) is screwed to the joint 2 in the clamp 1 according to the present embodiment.
As shown in FIG. 7, in the clamp 1 according to the present embodiment, a round hole 17 (through which the tip side portion of the stud bolt 4 is inserted into the ceiling portion 14 of the connecting portion 12 integrated with the left and right joint fixing frame portions 11 ( The opposing surface portion for supporting the bolt tip side was formed. Further, in a state where the clamp 1 is positioned and fixed to the clamp mounting surface 3 via the stud bolt 4, the bottom surfaces 19 of the left and right joint fixing frame portions 11 are formed so as to come into contact with the clamp mounting surface 3.

According to this, the screw tightening moment (see arrow D in FIG. 6) when screwing the tube body 5 to the joint 2 attached to the clamp 1 is the same as that of the stud bolt 4 by the left and right opposing surface portions of the inner wall of the round hole 17. The support portion 71 and the left and right joint fixing frame portions 11 are supported at three points (bottom surface portions) 72 and 73 of each bottom surface 19.
That is, the stress is not concentrated on one point (accordingly distributed) as in the prior art, and the necessity for a high holding force by a strong constituent member is reduced. Further, it is not necessary to use a strong, that is, heavy metal bracket, bolt or nut, and the whole can be formed of a synthetic resin, thereby reducing the weight.

8 is inserted into the ceiling portion 14 of the connecting portion 12 so that the tip end portion of the stud bolt 4 is sandwiched from both the left and right sides, and the round hole 17 shown in FIG. 7 (the opposed surface portion for supporting the bolt tip side). FIG. 11 is an operation explanatory diagram for the case where there is no corresponding hole or there is a large amount of play in the left-right direction with the tip side portion of the stud bolt 4 even if there is a corresponding hole.
In this case, the portion through which the stud bolt tip side portion of the ceiling portion 14 is inserted does not function as the stud bolt support portion 71 shown in FIG. Therefore, for example, when a screw tightening moment (see arrow D) acts on the joint fixing frame portion 11 on the left side in the figure, the stress is supported by only one point of the bottom surface portion 73 of the right joint fixing frame portion 11. In other words, it can be seen that the presence of the opposing surface portion having little play with the stud bolt tip side portion, in this embodiment, the round hole 17 (see FIG. 7) is important.

  As described above, according to the pipe joint clamp 1 according to the present embodiment, the fixing to the mounting surface 3 can be performed extremely easily without welding or nut tightening, and the operation cost can be reduced. Further, when the pipe body is attached to the joint 2, stress is not concentrated on one point, and accordingly, a high holding force is not required for each component member. Further, there is an effect that the weight can be reduced by forming the whole with a synthetic resin.

It is a perspective view showing one embodiment of a clamp for pipe joints by the present invention. It is a front view which shows the principal part of a clamp same as the above. It is a longitudinal cross-sectional schematic diagram of a clamp same as the above. It is a perspective view for demonstrating the attachment to the attachment surface of a clamp same as the above. It is a perspective view which shows a mode just before a pipe body is attached to the joint fixed to the clamp same as the above. It is a perspective view which shows the state after a tubular body is similarly attached and fixed. It is action | operation explanatory drawing of a clamp same as the above. FIG. 8 is an operation explanatory view when the bolt tip portion penetrates in a state where there is a large play in the round hole of the clip portion in FIG. 7. It is a perspective view of the conventional clamp for pipe joints. It is an exploded perspective view similarly. It is an operation explanatory view similarly.

Explanation of symbols

1: tube joint clamp, 2: joint, 3: clamp mounting surface, 4: stud bolt (screw shaft), 5: tube body, 11: joint fixing frame portion, 12: coupling portion, 13: bottom portion, 14: Ceiling part, 15: hollow part, 16: locking claw, 17: round hole (opposing surface part), 19: bottom face of joint fixing frame part.

Claims (2)

A tube joint clamp comprising left and right joint fixing frame portions for fixing each joint, and a connecting portion located between the left and right joint fixing frame portions and integral with both joint fixing frame portions. ,
The connecting portion is
A hollow part through which the screw shaft protruding from the clamp mounting surface is inserted from the bottom part toward the ceiling part,
At least a pair of latches having elasticity, with tips extending from the opposite positions of the inner wall of the hollow portion in the direction of the ceiling, and engaging the screw portion of the screw shaft inserted through the hollow portion from both sides. Nails,
A screw shaft tip side support opposing surface portion that is provided in the ceiling portion and is inserted so as to sandwich the tip side portion of the screw shaft inserted through the hollow portion from both left and right sides;
For a tube joint, wherein at least the bottom surfaces of the left and right joint fixing frame portions are formed in contact with the clamp mounting surface while being positioned and fixed to the clamp mounting surface via the screw shaft. Clamp. The tube joint clamp according to claim 1, wherein the left and right joint fixing frame portions and the connecting portion are integrally formed of a synthetic resin.

Images