JP2023048893A - Hose connection structure - Google Patents

Abstract

To provide a hose connection structure capable of holding the durability and sealability without lowering connection workability.SOLUTION: The hose connection structure where the end of a connected object 14 is inserted into the end of a hose 10 having elasticity at least in the radial direction to actualize communicative connection, includes a jig 12 inserted and installed inside the hose end and having an outer diameter for enlarging the diameter of the hose in the inserted and installed state, and a swollen part 14a provided on at least part of a connection site for the connected object and having an outer diameter larger than the inner diameter of the jig, the jig having fragility which is destroyed by the swollen part when the connected object is inserted thereinto.SELECTED DRAWING: Figure 1B

Description

TECHNICAL FIELD The present invention relates to a hose connection structure, and more particularly to a hose connection structure for communicating and connecting a hose to a connection object.

BACKGROUND ART In general, hoses are used in various hydraulic, hydraulic, and pneumatic devices as means for transporting liquids, gases, powders, and the like. The connection between the hose and the fitting requires high sealing performance such as pressure resistance and durability.

For example, in Patent Document 1, a heat-generating layer is provided that extends from a sleeve that covers the outer periphery of the hose to the hose, and the heat-generating layer covers the outer periphery of the sleeve and the hose to prevent water leakage.

Further, Patent Document 2 discloses a technique in which the inner peripheral surface of the end of an elastic hose and the outer peripheral surface of a tubular member for hose connection are fixed with a fixing layer to ensure sealing performance. Further, the fixing layer uses an elastic material such as fluorine-based resin. Due to this structure, even if the straining force of the elastic hose is reduced due to long-term use, the elastic effect of the fixing layer ensures a tight seal between the inner peripheral surface of the innermost layer of the hose and the outer peripheral surface of the connecting tubular member. there is

JP 2010-216627 A JP-A-09-144955

However, in the techniques of Patent Documents 1 and 2, the structure of the hose side is changed to a stronger one in order to increase resistance to pressure, so the hose is stiff, and when inserting the hose connection pipe joint into the hose, , there is a problem that it is difficult to insert and workability is reduced because it is required to apply a further force.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a hose connection structure capable of maintaining durability and sealing performance without lowering connection workability. .

In order to achieve the above object, a hose connection structure according to one embodiment of the present invention is a hose connection structure for inserting an end to be connected into an end of a hose that is stretchable at least in the radial direction for communication connection. , a jig that is inserted into the inside of the end of the hose and has an outer diameter that expands the diameter of the hose in the inserted state; a bulging portion having a larger outer diameter, wherein the jig has a vulnerability to be broken by the bulging portion when the connection object is inserted inside.

Further, in one embodiment of the present invention, in the hose connection structure, the connection target has an outer diameter of a distal end portion on the side of insertion into the hose set smaller than an inner diameter of the jig, and the distal end portion characterized in that the bulging portion is provided in the vicinity of the .

Further, in one embodiment of the present invention, in the hose connection structure, a concave portion is provided on the outer surface of the hose to be connected and the portion to be inserted into the jig, and the jig is water-soluble. It is characterized by being a material that produces adhesive strength after reacting with water.

In one embodiment of the present invention, in the hose connection structure, the material of the jig is cellulose nanofibers or a resin containing cellulose nanofibers.

In one embodiment of the present invention, in the hose connection structure, the jig is formed by connecting a plurality of ring-shaped members having approximately the same diameter at predetermined intervals so that their centers are coaxially aligned. characterized by

ADVANTAGE OF THE INVENTION According to this invention, the hose connection structure which can maintain and improve durability and a sealing property can be provided, improving workability|operativity of connection.

It is a figure which shows the stage where a jig is inserted in a hose. FIG. 10 is a diagram showing a stage in which a nipple to be connected is inserted into a hose into which a jig has been inserted; FIG. 10 is a diagram showing a state when insertion of the nipple into the hose is started; FIG. 10 is a diagram showing a state in which the nipple is inserted into the hose to a predetermined position; FIG. 10 is a diagram showing a state in which a connection band is installed on a hose into which a nipple is inserted; FIG. 4 is a diagram showing a configuration in which dimples are provided on the outer surface of the nipple; FIG. 5 is a diagram showing another configuration example of a jig; FIG. 6 is a view showing a stage in which a nipple is inserted into the hose to which the jig shown in FIG. 5 is attached;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments according to the present invention will be described in detail based on the drawings. In FIGS. 1B, 2A, 2B and 6, cross-sectional views are shown above the central line extending in the horizontal direction, and side views are shown below the central line.

1A and 1B are diagrams illustrating an embodiment of a hose connection structure according to the present invention, and FIG. 1A shows a hose 10 and a jig 12 inserted therein. The hose 10 does not have a special configuration, and is, for example, an inlet or a flow port of a cooler (engine oil cooler that cools engine oil supplied to the engine) mounted on an automobile as an example to which the present invention is applied. A hose that is attached to the outlet and has a predetermined stretchability.

The structure of the hose 10 includes, for example, an inner layer tube and a reinforcing layer covering the outer periphery thereof. The inner layer tube of the hose 10 is made of, for example, a thermoplastic resin or a thermoplastic elastomer, and may be of any material and structure as long as it has stretchability capable of exhibiting the effects of the present invention.

The jig 12 is formed in a cylindrical shape with a predetermined thickness, and is inserted into the hose 10 using the opening 10a of the hose 10 as an inlet. Importantly, the fixture 12 is configured to be mountable within the hose 10 and have a predetermined weakness. That is, it has fragility to such an extent that the shape cannot be maintained by the force applied when the connection object is inserted, and the material and shape are set so as to achieve the breakage.

The hose 10 has an outer diameter H1, an inner diameter H2, and the jig 12 has an outer diameter G1. It is set large (G1>H2). For example, when the hose inner diameter H2 is 25 mm, the jig outer diameter G1 is 27 mm. Therefore, as shown in FIG. 1B, the portion of the end of hose 10 into which jig 12 is inserted is enlarged.

In FIG. 1B, the nipple 14 is to be connected to the hose 10 and is made of a rigid material, metal. A protruding portion 14a is formed in the vicinity of the end portion thereof for improving the mountability, the outer diameter thereof is N1, and the inner diameter of the jig 12 is G2. The outer diameter N1 of the bulging portion 14a of the nipple 14 is set larger than the inner diameter G2 of the jig 12 (N1>G2). Therefore, when the nipple 14 is inserted into the jig 12 and the bulging portion 14a is inserted into the jig 12, a force is applied to the jig 12 in the radially expanding direction due to the relationship between the diameters of the jig 12, and the jig 12 is broken by the force. be For example, when the inner diameter G2 of the jig 12 is 26 mm, the outer diameter N1 of the tubular projection 14a of the nipple 14 is 28 mm.

1B and 2A, the outer diameter N2 of the tip end of the nipple 14 is set smaller than the inner diameter G2 of the jig 12. is easily inserted without the hose 10 needing to be spread.

FIG. 2B shows a state in which a predetermined range including the bulging portion 14a of the nipple 14 is inserted into the hose 10. In this state, the jig 12 has already been destroyed by the shrinkage force of the hose 10. The implement 12 is pressed against the nipple 14 side (that portion is indicated by a thick line in the figure).

In the hose structure described above, the jig 12 is installed inside the end of the hose 10, and the diameter of the end of the hose at that portion is expanded in advance. Further, the nipple 14 to be connected has a bulging portion 14 a whose outer diameter is set larger than the inner diameter of the jig 12 . Therefore, when the nipple 14 is inserted into the hose 10 in which the jig 12 is inserted, the bulging portion 14a collides with the jig 12 and exerts force on the jig 12 in the radially expanding direction. Add. At this time, since the jig 12 is so fragile that it cannot withstand the expanding force, it is broken and the nipple 14 is inserted up to a predetermined position. In the inserted state, the hose 10 is attached to the nipple 14 in such a way that it presses against the nipple 14 and the broken jig 12 . Therefore, a state in which the nipple 14 can be easily inserted into the hose 10 is obtained, and the airtightness is maintained, thereby improving workability of connection. In addition, since the jig 12 is fragile, it does not hinder the insertion operation of the object to be inserted, ensuring a smooth connection operation.

Further, when inserting the nipple 14 into the hose 10 and the jig 12, since the outer diameter N2 of the tip of the nipple 14 is smaller than the inner diameter H2 of the jig 12, it can be easily inserted and further pushed in as it is. The jig 12 is broken, the diameter of the hose 10 is reduced, and the connection is completed. Therefore, the connection operation is facilitated.

FIG. 3 shows a state in which the connecting band 16 is attached from the outside of the hose 10 in a state in which a desired insertion range including the bulging portion 14a of the nipple 14 is inserted. and the hose 10 are in close contact with each other, ensuring a stronger seal.

FIG. 4 shows another configuration example of the nipple 14, showing a configuration in which a plurality of dimples 14b are provided as recesses on the outer surface of the nipple 14. As shown in FIG. This is provided so that when water is applied to the surface of the nipple 14 in advance, the water stays there.

On the other hand, the jig 12 is preferably made of a water-soluble material. More preferably, it is made of a material that becomes sticky after being dissolved in water. For example, in the present embodiment, cellulose nanofiber is used as a material, and effects based on the fragility, water solubility, and adhesiveness described above can be exhibited. The material of the jig 12 is not limited to this as long as the object of the present invention can be achieved. For example, starch may be used. A mixture of starch and cellulose nanofibers may also be used. Also, a resin containing cellulose nanofibers may be used.

With these structures, water is applied to the surface of the nipple 14 having the dimples 14b formed thereon, and when this is inserted into the hose 10 to which the jig 12 made of the above material is attached within a desired range, the treatment can be performed. The tool 12 is broken by the expanding force of the bulging portion 14a of the nipple 14, and is dissolved by the water accumulated in the dimple 14b. The broken and melted jig 12 forms an adhesive layer indicated by a thick line in the drawing, improving the adhesion between the hose 10 and the nipple 14 .

By applying water in advance to the concave portion formed in the nipple 14 in this manner, after the jig 12 is destroyed, the jig 12 reacts with the water and has an adhesive force, and the hose 10 and the jig 12 have adhesive strength. Adhesion with the nipple 14 is further improved, and at the same time, sealing performance is ensured. The shape of the recess can be appropriately designed so that water can be retained. can stay.

FIG. 5 is a diagram showing another configuration example of the jig 20. As shown in FIG.
As shown in the figure, a plurality (six in this embodiment) of ring-shaped members 20a having the same diameter are arranged at predetermined intervals so that their centers are aligned coaxially, and are connected by connecting portions 20b. It is configured.

The jig 20 is composed of a plurality of ring-shaped members 20a. The end of the hose 10 is expanded by these ring-shaped members 20a. There is only the connecting portion 20b that is .

Since this jig 20 is not a rigid structure, it will not break when it is pushed into the tip of the hose 10, but when the bulging portion 14a of the nipple 14 is inserted inside it, the ring The difference in diameter from the shaped member 20a ensures destruction. That is, the required fragility is ensured not only by the selection of materials but also by the structure.

The configuration of the jig 12 is not limited to the configuration of each example described above, and any configuration can be used as long as it is fragile enough to achieve the object of the present invention and can maintain its shape when inserted into the hose 10. It can be.

In the connection operation based on the hose connection structure of the present embodiment, first, the jig 12 is mounted inside the end of the hose 10, and this operation is performed so that the jig 12 is not destroyed. This requires that the jig 12 has strength enough to withstand the operation of attaching it to the hose 10, and that it is fragile enough to be destroyed by the operation of inserting the nipple 14. It can be easily ensured by the choice of structure.

That is, if the jig 12 is configured to have no elasticity, the bulging portion 14a of the nipple 14 has an outer diameter larger than the inner diameter of the jig. Giving the jig 12 strength when it is inserted into the hose 10 can be done without difficulty.

It is of course possible to install the jig 12 in a tool for expanding the diameter of the end of the hose 10 in order to insert the jig 12 into the hose 10 .

Next, the nipple 14 is inserted into the end of the hose 10 to which the jig 12 is attached. By continuing the insertion operation, the jig 12 is properly destroyed by the bulging portion 14a.

In addition, in the present embodiment, the outer diameter of the portion other than the distal end portion of the nipple 14 and the bulging portion 14a is not specified, but from the viewpoint of adhesion to the hose 10, the hose in the normal state It is preferable to have an outer diameter larger than the inner diameter of 10 . However, by providing the connection band 16 outside the connecting portion of the hose 10 , the outer diameter of the other portion of the nipple 14 can be made equal to the inner diameter of the hose 10 .

By these operations, the hose connection structure according to the embodiment of the invention is easily constructed. That is, due to the action of the water solubility and adhesiveness of the jig 12 which is destroyed only by the insertion operation of the nipple 14, a connection structure with high adhesion is ensured with a simple insertion operation.

The application field of the hose connection structure according to the present invention is not particularly limited, and it can be used in various fields. That is, it can be applied not only to the piping of the engine oil cooler described above, but also to various fields such as construction.

REFERENCE SIGNS LIST 10 hose 10a opening 12 jig 14 nipple 14a bulging portion 14b dimple 16 connection band 20 jig 20a ring-shaped member 20b connecting member

Claims (5)

A hose connection structure for communicatively connecting by inserting an end to be connected into an end of a hose having elasticity at least in the radial direction,
a jig inserted inside the end of the hose and having an outer diameter for expanding the diameter of the hose in the inserted state;
a bulging portion having an outer diameter larger than the inner diameter of the jig provided at least part of the connection location of the connection target,
The hose connection structure, wherein the jig is fragile to be destroyed by the bulging portion when the object to be connected is inserted inside. The object to be connected is characterized in that the outer diameter of the most distal end on the side of insertion into the hose is set to be smaller than the inner diameter of the jig, and the bulging portion is provided in the vicinity of the distal end. The hose connection structure according to claim 1. A concave portion is provided on the outer surface of the hose to be connected and the portion inserted into the jig,
3. The hose connection structure according to claim 1, wherein the jig is made of a material that is water-soluble and produces adhesive force after reacting with water. The hose connection structure according to any one of claims 1 to 3, wherein the material of the jig is cellulose nanofibers or a resin containing cellulose nanofibers. 5. The jig according to any one of claims 1 to 4, wherein the jig comprises a plurality of ring-shaped members having approximately the same diameter, which are connected at predetermined intervals so that their centers are aligned coaxially. hose connection structure.

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