JP4369716B2 - Joint member and pipe fixing sleeve - Google Patents

Description

The present invention relates to a joint member and a pipe fixing sleeve for connecting and fixing a pipe to a male or female cylindrical joint member constituting a pipe joint.

Conventional notebook computers generally have an air-cooling type that cools the CPU by rotating a fan provided in the main body with a built-in CPU. However, as the capacity of the CPU increases, it becomes more efficient. The water-cooled type with quiet sound is becoming commercially available.
That is, a cooling pipe that is thermally connected to the CPU provided in the main body portion is extended to the back surface of the liquid crystal monitor portion, and cooling is performed so that the refrigerant heated by the heat from the CPU dissipates heat when passing through the back surface portion of the monitor. Is supposed to do.

This water-cooled cooling system is configured by connecting a plurality of pipes, and the pipes are connected by a pipe joint.
For example, as shown in FIG. 1, for example, as shown in FIG. 1, the male member or the female joint member in the conventional pipe joint is connected to the rear end of the joint member C by screw-engaging a nut member N. The fixing member F having a wedge-shaped cross section is generally press-fitted between the pipe P and the joint member C (for example, Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document 4). ). However, such a connection using the nut member N increases the size of the pipe joint.
In a notebook personal computer, parts to be housed inside are required to be miniaturized as much as possible. Therefore, such a fixing method has been required to be improved.
JP-A-60-151495 JP-A-60-91086 US Patent 4,076,286 US Patent 4,059,297

  An object of this invention is to make the connection part of a coupling member and a pipe compact in view of the above points.

That is, the present invention
The joint member is press-fitted into an annular space formed between the inner peripheral surface of a male or female cylindrical joint member constituting the pipe joint and the outer peripheral surface of a pipe inserted into the joint member. A tubular joint member for fixing a pipe and a sleeve for fixing a pipe,
An outer peripheral surface concentrically formed with the pipe, and an inner peripheral surface, and a press-fitted portion press-fitted into the annular space;
A large-diameter annular engagement that is located on the rear end side of the joint member / pipe fixing sleeve and is located outside the annular space and engages a tool for press-fitting the press-fitting portion into the annular space. And
Even if the outer peripheral surface and the inner peripheral surface engage the tool with the annular engagement portion and press-fit the press-fit portion into the annular space, and then remove the tool from the annular engagement portion, Provided is a joint member / pipe fixing sleeve characterized in that the length is sufficient to maintain the press-fitted state by engagement with the joint member and a pipe.
In this fixing sleeve, the press-fitted portion that is press-fitted into the annular space between the pipe joint and the pipe has an outer peripheral surface and an inner peripheral surface that are concentric with the pipe. Even if it removes from a joint part, it can be set as the length sufficient to maintain the said press-fit state by engagement with this joint member and pipe of the said press-fit part.
In the above-described conventional pipe joint, since the fixing member F inserted into the annular space formed between the joint member and the pipe is wedge-shaped in its entire cross section, the length of the annular space is reduced. (Depth) cannot be made too large, and therefore, the contact area between the fixing member F and the joint member and the pipe cannot be taken sufficiently. Therefore, the joint member can be obtained only by press-fitting the fixing member F. And the pipe could not be connected. In fact, in a conventional pipe joint, when the nut member N is removed from the joint member C and a pulling force is applied to the pipe P by hand, the pipe P is usually easily pulled out of the joint member together with the fixing member F. there were.
On the other hand, in the present invention, it is possible to connect only by press-fitting the fixing sleeve.

The outer peripheral surface can be provided with an outer annular engagement convex portion having a larger diameter than the inner peripheral surface of the joint member.
The outer annular engagement convex portion facilitates the press-fitting of the fixing sleeve, and the restoring force due to the elastic deformation by the press-fitting ensures the coupling of the fixing sleeve with the pipe.

The outer annular engagement convex portion has a front small-diameter portion, a rear large-diameter portion, and an inclined portion that gradually inclines from the small-diameter portion to the large-diameter portion with reference to the press-fitting direction of the joint member / pipe fixing sleeve. The small-diameter portion can have a smaller diameter than the inner peripheral surface of the cylindrical joint member, and the large-diameter portion can have a larger diameter than the inner peripheral surface.
This shape of the outer annular engagement convex portion facilitates press-fitting of the fixing sleeve.

The distal end portion of the joint member / pipe fixing sleeve is preferably thinner in the radial thickness than the rear portion following the distal end portion.
This is so that it can be easily deformed when the tip is pressed against the inner surface of the joint member, and the deformation fills the gap between the joint member and the pipe. It is possible to increase.

The joint member / pipe fixing sleeve may have a tapered portion whose diameter gradually increases from the front end portion toward the rear.
Such a tapered portion facilitates press-fitting of the fixing sleeve, and can make the sealing engagement between the joint member and the pipe more appropriate.

An inner annular engagement projection provided on the inner peripheral surface of the joint member / pipe fixing sleeve, the inner diameter of which is smaller than that of the pipe, and when the joint member / pipe fixing sleeve is press-fitted, The annular engagement convex portion can be elastically deformed. The purpose of this is to facilitate press-fitting and improve the sealing performance, similar to the outer annular engaging projection.

An annular recess extending in the circumferential direction and having a curved axial cross section can be provided on the inner peripheral surface of the joint member / pipe fixing sleeve.
In this case, the fixing sleeve is press-fitted in a bent state, and when the press-fitting is completed, the restoring force acts to strengthen the connection between the joint member and the pipe.

Hereinafter, a joint member and a pipe fixing sleeve according to the present invention will be described with reference to the accompanying drawings.
2 and 3 show a first embodiment of a joint member / pipe fixing sleeve according to the present invention.
That is, the fixing sleeve 10 includes an inner peripheral surface C-1 of a male or female cylindrical joint member C constituting a pipe joint, and an outer peripheral surface P- of a pipe P inserted into the joint member C. The joint member C and the pipe P are fixed by being press-fitted into an annular space S formed between them.
As shown in the figure, the fixing sleeve 10 has an outer peripheral surface 12 and an inner peripheral surface 14 that are concentric with the pipe P, and a press-fit portion 16 that is press-fitted into the annular space S. A large-diameter annular engagement which is located on the rear end side of the sleeve 10 and is located outside the annular space S and engages a tool (not shown) for press-fitting the press-fitting portion 16 into the annular space S. Part 18. The outer peripheral surface 12 is provided with a plurality of outer annular engaging projections 20 having a larger diameter than the inner peripheral surface C-1 of the joint member C at predetermined intervals in the axial direction of the press-fit portion 16. The outer annular engagement convex portion 20 has a front small-diameter portion 22, a rear large-diameter portion 24, and a slope gradually inclined from the small-diameter portion to the large-diameter portion with reference to the press-fitting direction of the joint member / pipe fixing sleeve. A small-diameter portion 22 having a smaller diameter than the inner peripheral surface C-1 of the tubular joint member C, and the large-diameter portion 24 having a larger diameter than the inner peripheral surface C-1. Has been. A plurality of similar inner annular projections 30 are also provided on the inner peripheral surface 14 of the fixing sleeve, and the inner diameter of the annular projection 30 is made smaller than the outer shape of the pipe P. However, the direction of inclination of the inner annular convex portion 30 is reversed from that of the outer annular convex portion.
In the fixing sleeve 10, the press-fit portion 16 that is press-fitted into the annular space S between the pipe joint C and the pipe P has the outer peripheral surface 12 and the inner peripheral surface 14 that are concentric with the pipe. In the state where the press-fitted portion is press-fitted into the annular space, the frictional engagement between the outer peripheral surface 12 and the inner peripheral surface 14 and the corresponding inner peripheral surface C-1 of the joint portion and the outer peripheral surface P-1 of the pipe is A large resistance force is generated with respect to the force for pulling out the fixing sleeve 10 from the annular space. Therefore, the joint member C and the pipe P can be reliably fixed. Further, the large-diameter annular engagement portion 18 makes it easy to press-fit the fixing sleeve 10 using a tool, and enables reliable press-fitting. The outer annular engagement protrusion 20 facilitates the press-fitting of the fixing sleeve 10 and the restoring force due to the elastic deformation caused by the press-fitting ensures the coupling of the fixing sleeve with the pipe. Similarly, the inner annular engagement convex portion 30 is provided to ensure the coupling.

As shown in the drawing, the distal end portion 34 of the joint member / pipe fixing sleeve 10 is thinner in the radial direction than the rear portion following the distal end portion.
This is so that when the front end portion 34 is pressed against the inner surface of the joint member C after being press-fitted, it is press-fitted into the space between the joint member C and the pipe P by the deformation. It is possible to increase the sealing performance by filling the gaps.

4 and 5 show another joint member / pipe fixing sleeve 10-2 of the present invention. That is, the fixing sleeve 10-2 has an outer peripheral surface 12-2 and an inner peripheral surface 14-2 that are concentric with the pipe P in the same manner as the fixing sleeve 10 described above. 10 and a press-fit portion 16-2 that is press-fitted into the annular space between the pipe P and the rear end of the fixing sleeve 10-2, located outside the annular space S. A large-diameter annular engagement portion 18-2 for engaging a tool (not shown) for press-fitting into the annular space, and an outer peripheral surface 12-2 and an inner peripheral surface 14-2. A plurality of outer annular protrusions 20-2 are formed. The fixing sleeve 10-2 is characterized in that it includes a tapered portion 36 whose diameter gradually increases from the tip 34-2 of the press-fitting portion 16-2 toward the rear.
Such a tapered portion 36 facilitates press-fitting of the fixing sleeve, and makes it possible to increase the degree of press-fitting into the annular space between the fixing sleeve 10 and the pipe P. In addition, in the fixing sleeve 10-2 according to this embodiment, the inner annular convex portion 30 in the first embodiment is not provided on the inner peripheral surface 14-2.

6 and 7 show a fixing sleeve 10-3 according to the third embodiment, and this fixing sleeve 10-3 has substantially the same configuration as that according to the second embodiment 10-2. However, the inner peripheral surface 14-3 is formed with a recess 40 that extends in the circumferential direction and has a curved axial cross section.
The curved concave portion facilitates press-fitting of the fixing sleeve, and strengthens the connection between the joint member and the pipe with the restoring force when the press-fitting is completed.

8 and 9 show a fixing sleeve 10-4 according to another embodiment. This fixing sleeve has substantially the same configuration as that of the embodiment shown in FIGS. 4 and 5, but differs in that there is no outer annular convex portion on the outer peripheral surface 12-4.
Since the fixing sleeve 10-4 according to this embodiment also has a tapered structure, it can be understood that the press-fitting into the annular space between the joint member and the pipe can be strengthened and a sufficient hermetic coupling is possible. It was.

It is the side view which showed the upper half part of the pipe joint using the conventional fixing sleeve in the cross section. It is the side view which showed the pipe joint using the sleeve for fixation concerning the present invention in the upper half part by a section. It is the expanded side view which showed the upper half part of the fixing sleeve in cross section. It is the side view which showed the upper half part by the cross section of the pipe joint using the sleeve for fixation concerning the 2nd Embodiment of this invention. It is the expanded side view which showed the upper half part of the fixing sleeve in cross section. It is the side view which showed the upper half part by the cross section of the pipe joint using the fixing sleeve which concerns on the 3rd Embodiment of this invention. It is the expanded side view which showed the upper half part of the fixing sleeve in cross section. It is the side view which showed the upper half part by the cross section of the pipe joint using the sleeve for fixation concerning the 4th Embodiment of this invention. It is the expanded side view which showed the upper half part of the fixing sleeve in cross section.

Explanation of symbols

C Joint member C-1 Inner peripheral surface P Pipe P-1 Outer peripheral surface 10 Fixing sleeve 10-2 Fitting member / pipe fixing sleeve 10-3 Fixing sleeve 10-4 Fixing sleeve 12 Outer peripheral surface 12-2 Outer peripheral surface 14 Inner peripheral surface 14-2 Inner peripheral surface 14-3 Inner peripheral surface 16 Press-fit portion 16-2 Press-fit portion 18 annular engagement portion 18-2 annular engagement portion 20 outer annular engagement convex portion 20-2 outer annular engagement Convex portion 20-3 Outer annular engagement convex portion 22 Small diameter portion 24 Large diameter portion 26 Inclined portion 30 Inner annular convex portion 34 Tip portion 34-2 Tip 36 Tapered portion 40 Curved recess

Claims (6)

The joint member is press-fitted into an annular space formed between the inner peripheral surface of a male or female cylindrical joint member constituting the pipe joint and the outer peripheral surface of a pipe inserted into the joint member. A tubular joint member for fixing a pipe and a sleeve for fixing a pipe,
An outer peripheral surface concentrically formed with the pipe, and an inner peripheral surface, and a press-fitted portion press-fitted into the annular space;
The joint member / pipe fixing sleeve is located on the rear end side of the joint member, and when the press-fitted portion is press-fitted into the annular space, the tool is located outside the annular space and engages with the press-fitting tool. A large-diameter annular engagement portion for
Even if the outer peripheral surface and the inner peripheral surface engage the tool with the annular engagement portion and press-fit the press-fit portion into the annular space, and then remove the tool from the annular engagement portion, It is long enough to maintain the press-fit state ,
The joint member / pipe fixing sleeve is characterized in that an outer annular engagement convex portion having a larger diameter than the inner peripheral surface of the joint member is provided on the outer peripheral surface . The outer annular engagement convex portion includes a front small-diameter portion, a rear large-diameter portion, and a slope portion gradually inclined from the small-diameter portion to the large-diameter portion with reference to the press-fitting direction of the joint member / pipe fixing sleeve. The joint according to claim 1 , wherein the small diameter portion has a smaller diameter than the inner peripheral surface of the cylindrical joint member, and the large diameter portion has a larger diameter than the inner peripheral surface. Sleeve for fixing members and pipes. Radial wall thickness, joint member pipe fixing sleeve according to claim 1 or 2, characterized in that thinner than subsequent rear portion in the front end portion of the tip portion of the joint member pipe fixing sleeve. 4. The joint member / pipe fixing member according to any one of claims 1 to 3 , further comprising a taper portion having a diameter that gradually increases from the front end portion of the joint member / pipe fixing sleeve toward the rear. sleeve. An inner annular engagement convex portion provided on the inner peripheral surface of the joint member / pipe fixing sleeve, the inner annular engagement convex portion having an inner diameter smaller than that of the pipe, and the joint member / pipe fixing When use sleeve is the press-fitting member pipe fixing sleeve according to any one of claims 1 to 4 inner annular engaging convex portion is characterized in that so as to elastically deform. The joint member according to any one of claims 1 to 5 , wherein the joint member-pipe fixing sleeve has an annular recess extending in the circumferential direction and having a curved axial cross section on the inner peripheral surface of the joint member-pipe fixing sleeve. Pipe fixing sleeve.

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