JP4564821B2 - Hose connection bracket - Google Patents

Description

  The present invention relates to a hose connection fitting, and more specifically, relates to a hose connection fitting in which a hose crimping portion and a connection portion are formed separately.

  For example, a hose fitting that has been widely used conventionally has a connection part that connects to a counterpart device and a part that connects the hose on the opposite side, and is usually connected to the hose. The part is a hose caulking part.

  And this hose connection metal fitting is generally an integrated structure provided with a caulking part that is cut from a hexagonal material or a round bar and provided with a connecting part to be connected to the mating member, and that fastens the hose on the opposite side. Also, the bent connection metal fittings called bend metal fittings are divided into a connecting part and a caulking part because there are many parts to be machined in an integrated shape, and these are joined together by friction welding, brazing, etc. It is considered that.

  FIG. 1 shows an example of a hose fitting a, in which a connecting portion 1 and a caulking portion 2 to other devices are integrally formed. A hollow portion 3 through which a fluid flows is formed in the central portion. The connecting portion 1 is provided with a cap nut 1a connected to the device side (not shown). On the other hand, an inner cylinder 2a is formed on the caulking portion 2 side, and a hose b is inserted into the inner tube 2a. It is covered and crimped with the outer cylinder 4.

  In the former case, even if the hose insertion part is the same, if the connection part side is different, it must be cut from the hexagonal material or round bar as many as the shape of the connection part. It is necessary to align.

  On the other hand, in the latter case, it is difficult to set the caulking machine, and the caulking man-hour increases. When bend fittings are attached to both ends, first, the fitting on one side is caulked to set the reference angle, and then the mounting angle needs to be adjusted, which also increases the number of caulking steps.

  In addition, a support pin is inserted in the bracket to suppress deformation of the core metal when the hose is tightened. However, the support pin cannot be inserted in a metal fitting with a bend metal, and the deformation of the core metal due to crimping is suppressed. I can't.

  Furthermore, a bend fitting or a long fitting under the neck cannot be applied to caulking to a so-called inner cylinder caulking (full flow type) which is caulking from the inside rather than a method of caulking the hose from the outside.

  The present invention has been made in view of the above-described situation, and as a hose connection metal fitting, the functions of the respective parts are divided and formed as separate bodies, and these are integrated. As a matter of course, the connection portion provided for connection with the equipment can be shared in a wide range, and it is effective in reducing the inventory quantity and the inventory space.

The gist of the present invention is to provide a connecting portion for connecting to a counterpart device and a caulking portion for caulking and fixing a hose, forming a hollow portion communicating with the connecting portion and the caulking portion, and the connecting portion and the caulking portion. Are hose connection fittings that connect the connection portion and the crimping portion, and are provided on the hollow portion provided at the base portion of the connection portion and the end surface in the axial direction of the base portion of the connection portion. , the annular projection of the hollow portion is enclosed unnecessarily formed of connection or the annular recess, and a hollow portion provided on the base of the crimping portion, provided on an axial end face of the base of the clamping portion, the crimping portion the hollow portion and the annular recess or annular protrusion is enclosed unnecessarily form, comprising a connecting portion to the annular projection connected is inserted into the annular recess of the crimping portion, or connecting portion to the annular recess of the crimping portion By inserting and connecting the annular convex portion, the annular convex portion is accommodated in the annular concave portion and the axial end of the base portion of the crimping portion Per the axial end surface of the base portion of the connecting portion and, inserted an annular protrusion and each forms a circumferential groove on one of the opposed surfaces of the annular recess and fitted with C-type retaining ring on both circumferential groove portion A hose connection fitting.

  And preferably, the adhesive is filled in the opposing surface that does not form the circumferential groove portion of the inserted annular convex portion and annular concave portion, and more preferably, the adhesive is mainly composed of a thermosetting resin. It is an adhesive, in which a metal powder having a good thermal conductivity such as iron is blended.

Since the conventional hose connection fittings are manufactured integrally with the connection portion and the crimping portion, the number of manufacturing steps is large, and the hose crimping operation is extremely laborious. However, the hose connection metal fitting according to the present invention has a connection part and a caulking part separately manufactured, and the connection method adopts a C-type retaining ring method.

  For this reason, the joining operation can be connected with one touch, the connecting parts rotate with each other, and the caulking part is attached after attaching the connecting part to the equipment. Most effective for sex. In addition, the conventional hose connection fitting integrally formed with the connection portion and the crimping portion can share the connection portion, and is effective in reducing the inventory quantity and the inventory space. Furthermore, since a one-touch connection mechanism is incorporated, the number of connection steps is reduced, and it is effective for connection in a narrow place.

  The connecting part for connecting to the counterpart device and the caulking part for caulking and fixing the hose together form a hollow part for sending fluid, and preferably surround the hollow part of the connecting part around the annular convex part. On the other hand, on the caulking portion side, an annular recess is formed around the hollow portion in the same manner, and the annular uneven portion is inserted, and a circumferential groove is formed on the opposing surfaces of both. A C-type retaining ring is fitted into this. In this example, the C-type retaining ring is compressed in the circumferential groove when inserted, and the C-type retaining ring returns to its original size at the position where both circumferential grooves are matched, thereby preventing the both from coming off. It will be. An O-ring is fitted inside the circumferential groove to prevent water leakage.

  On the opposite surface opposite to the formation of the circumferential groove, an adhesive is preferably filled, and when this is cured, the bonding between the two becomes more complete.

  In the present invention, the caulking portion that is a portion for caulking the hose should be straight and have the minimum necessary length, and is constituted by a connection portion with the equipment to be joined to it, and is usually made of metal. In some cases, it may be made of a resin called engineering plastic, for example.

  As a method of connecting the crimped portion and the connecting portion of the hose, there are usually a one-touch insertion method, a screw seal method, a friction welding method, a brazing method, and a C-type retaining ring method. Preferably, a method using a combination with an adhesive is employed. As the adhesive, an adhesive made of a thermosetting resin is preferably used, and an adhesive obtained by mixing a metal powder having good thermal conductivity such as iron or aluminum is preferable.

  In normal one-touch connection, the main use is at a pressure of 7 MPa or less, but the present invention can be used up to a higher pressure by using a combination of a C-type retaining ring and preferably an adhesive as a joining method. The present invention is established.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 2 shows the connecting portion 1 in the hose connection fitting A according to the present invention. The hollow portion 2 is penetrated, and a cap nut 1a provided for connection to a device (not shown) is rotated at the tip side. It is installed freely. On the proximal end side, an annular convex portion 5 is formed so as to surround the hollow portion 2. A circumferential groove 6 in which a C-type retaining ring described later is accommodated is formed on the outer surface.

  In FIG. 3, one of the caulking portions 2 is formed with an annular concave portion 7 for accommodating the annular convex portion 5 on the base end side thereof, and a circumferential groove 8 facing the circumferential groove 6 and an inner side thereof. A circumferential groove 10 for accommodating the O-ring 9 is formed. And the inner cylinder 11 is formed in the front end side, and the front-end | tip of the hose 20 is inserted here. The outer cylinder 30 is caulked on the outer peripheral side of the hose 20 inserted, and the hose 20 is attached to the caulking portion 2.

  FIG. 4 is an enlarged view of the main part of the hose connection fitting A of the present invention, in which the annular convex part 5 of the connecting part 1 is inserted into the annular concave part 7 of the crimping part 2. When the C-type retaining ring 12 is initially inserted, the C-shaped retaining ring is slightly shrunk from its original shape. When the circumferential grooves 6 and 8 are matched, the C-shaped retaining ring returns to its original shape, and the joining is completed here. O-ring 9 seals both sides and prevents leakage of internal fluid.

  Usually, after connecting the connection part 1 to the apparatus side which is not illustrated first, and then connecting the hose 20 and the crimping part 2, both are joined. Both of them can be rotated around here due to the presence of the C-type retaining ring 12, and therefore, the ease of joining is brought about and the conventional drawback that the hose is twisted can be solved. It is.

  In addition, the adhesive agent was filled into S between opposing surfaces which do not form the circumferential grooves 6 and 8 of the annular convex part 5 and the annular recessed part 7 which were inserted. Such an adhesive is an adhesive mainly composed of a thermosetting resin. In order to increase the adhesiveness when heated, a metal powder having a good thermal conductivity is blended in the adhesive.

  The method using this C-type retaining ring 12 can be connected with one touch, the connecting parts rotate with each other, and the caulking part is attached after the connecting part is attached to the equipment, so there is no need to adjust the mounting angle at the time of hose assembly. , The hose does not twist when the hose is attached, which is most effective for hose attachment workability.

  In addition, the conventional hose connection fittings integrally formed with the connection portion and the caulking portion must be prepared and placed according to the shape of the connection portion depending on the pressure of the hose and the type of structure. As described above, the connection portion can be shared by dividing the connection portion to be connected to the counterpart device and the caulking portion to which the hose is fastened and fixed, which is effective in reducing the inventory quantity and the inventory space.

  Since the one-touch connection mechanism is incorporated, the connection part is first attached to the device side, and the connection between this and the caulking part is done with one touch, reducing the number of connection man-hours and using no connection tool. Valid for connection.

  Of course, in contrast to the above example, an annular recess can be formed in the connecting portion and an annular projection can be formed in the crimping portion.

  The present invention divides the hose connection metal fitting into a connection part for connecting to the counterpart device and a caulking part for caulking and fixing the hose, and this is a joint incorporating a one-touch connection mechanism. It can be applied to hose connection fittings and has an extremely excellent structure for improving workability.

FIG. 1 is a partially cutaway view showing an example of a conventional hose connection fitting. FIG. 2 is a partially cutaway view showing a connection portion in the hose connection fitting of the present invention. FIG. 3 is a partial cutaway view showing a caulking portion in the hose connection fitting of the present invention. FIG. 4 is an enlarged view of the main part of the hose connection fitting of the present invention.

Explanation of symbols

A: Hose connection bracket,
1: connection part,
1a: cap nut,
2: Caulking part,
2a: inner cylinder,
3: Hollow part,
4: outer cylinder,
5: annular convex part,
6, 8: Circumferential groove,
7: annular recess,
9: O-ring,
10: O-ring storage circumferential groove,
11: Inner cylinder,
12: C-type retaining ring,
20: Hose,
30: outer cylinder.

Claims (4)

A connecting portion for connecting to a counterpart device and a caulking portion for caulking and fixing a hose, forming a hollow portion communicating with the connecting portion and the caulking portion, and the connecting portion and the caulking portion as separate bodies A hose connection fitting that is manufactured and has a connection portion and a caulking portion connected,
A hollow part provided at the base of the connection part ;
Provided on the end face in the axial direction of the base portion of the connecting portion, and the annular protrusion or annular recess formed a hollow portion of the connecting portion is enclosed useless,
A hollow portion provided at the base of the crimped portion ;
Pressurizing provided on the end face in the axial direction of the base of the clamping portion, and a annular recess or annular protrusion is enclosed unnecessarily forming a hollow portion of the caulking portion,
By inserting and connecting the annular convex portion of the connecting portion into the annular concave portion of the crimping portion, or by inserting and connecting the annular convex portion of the crimping portion to the annular concave portion of the connecting portion, the annular convex portion is accommodated in the annular concave portion. And the axial end surface of the base portion of the crimping portion and the axial end surface of the base portion of the connection portion are hit,
It inserted an annular protrusion and each forms a circumferential groove on one of the opposed surfaces of the annular recess, ho, characterized in that fitted the C-type retaining ring on both circumferential groove portion - scan fitting.   The hose fitting according to claim 1, wherein an adhesive is filled in an opposing surface that does not form a circumferential groove portion of the inserted annular convex portion and annular concave portion.   The hose fitting according to claim 1 or 2, wherein the adhesive is an adhesive mainly composed of a thermosetting resin.   The hose fitting according to any one of claims 1 to 3, wherein a metal powder having a good thermal conductivity is blended in the adhesive.

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