JP6929153B2 - Hose fittings - Google Patents

Description

The present invention relates to a hose joint.

Conventionally, as a hose joint used in construction machinery, factory equipment and other machines, a joint in which the end of the hose is fixed by a crimping process has been known.

A hose that has been used for a long period of time beyond its life may cause, for example, the fluid existing inside the hose to leak from between the joint and the hose. May cause contamination. Therefore, the hose in use is inspected regularly, and if a leak occurs, measures such as replacement are performed.

In particular, in places where there are many hoses, there may be a leak from a hose other than the specific hose you want to check. It is difficult to see if there is a leak in the particular hose that you want to color and check.

As a method for confirming a hose leak, for example, a pipe joint of Patent Document 1 is known. This pipe joint has a water-stopping member for ensuring watertightness inside the pipe, and by arranging a coloring agent closer to the opening side than the water-stopping member, water leakage is visually detected from the outside when water leakage occurs. I am trying to do it. However, the pipe joint of Patent Document 1 is a type of joint that uses a cap, and there is no description in Patent Document 1 regarding a type of joint in which a hose is fixed by a crimping process.

JP-A-2010-209950

Therefore, an object of the present invention is to provide a hose joint for fixing a hose by a crimping process, and a hose joint capable of confirming leakage of a fluid flowing in the hose.

The above purpose is
A core fitting that is inserted into the hose end and has a tubular portion that faces the inner peripheral surface of the hose end, and a sleeve that crimps and covers the hose end into which the core fitting is inserted from the outside. In the hose joint that you have
A colorant layer is formed on the inner peripheral surface of the sleeve and / or the outer peripheral surface of the tubular portion of the core metal fitting.
When the fluid flowing in the hose flows through the gap between the hose and the tubular portion of the core fitting in the sleeve in the direction of leaking to the outside together with the colorant of the colorant layer, the sleeve. A colorant confirmation means for confirming the colorant flowing with the fluid is provided.
The position where the colorant confirming means is provided in the sleeve is achieved by a hose joint in which the fluid leaks out from the position where the colorant layer is formed.

According to the above configuration, when the fluid flowing in the hose flows in the direction of further leaking to the outside through the gap between the hose and the tubular portion of the core fitting, the fluid flows to the inner peripheral surface of the sleeve and /. Alternatively, the fluid flows together with the colorant from the colorant layer formed on the outer peripheral surface of the core fitting. The colorant flowing together with the fluid can be confirmed by the colorant confirmation means provided on the side in the direction in which the fluid leaks from the position where the colorant layer is formed. This makes it possible to discover the occurrence or possibility of fluid leakage. Further, by using a colorant, even when the outer surface of the hose or the joint becomes dirty and difficult to see, it can be easily confirmed.

Preferred embodiments of the present invention are as follows.

(1) On the inner peripheral surface of the sleeve, a plurality of protrusions extending in the circumferential direction and protruding inward of the sleeve are formed at intervals in the axial direction of the sleeve, and the colorant. The confirmation means is formed on the hose end side of the plurality of protrusions on the side most opposite to the hose end side.

According to this configuration, leakage of fluid through the gap between the sleeve and the hose can be confirmed. In addition, the protrusions bite into the hose by the above-mentioned crimping work to prevent liquid leakage at various places, but if the fluid flowing through the gap between the sleeve and the hose is the above-mentioned hose end. If the fluid stops in front of the most opposite protrusion and does not flow any further, the presence of the colorant is confirmed by the colorant confirmation means, so that the fluid leaks before it leaks to the outside. It becomes possible to confirm that there is a possibility. This makes it possible to prevent the leakage of the fluid.

(2) The core metal fitting has an annular abutting portion adjacent to the tubular portion and facing the end surface of the hose, and the inner peripheral surface of the sleeve is the outer periphery of the abutting portion of the core metal fitting. The hose joint according to claim 1 or 2, which has a contact portion that contacts and faces a surface, and the colorant confirming means is provided at the contact portion of the sleeve. According to this configuration, it is possible to confirm leakage through the portion where the core metal fitting and the sleeve come into contact with each other.

(3) The colorant confirmation means is a window in which the fluid containing the colorant can be visually recognized from the outside. This makes it possible to confirm the occurrence or possibility of leakage just by visually recognizing it.

(4) The colorant confirmation means is a sensor capable of detecting a fluid containing the colorant. When the colorant is detected by the sensor, it is possible to immediately confirm the occurrence or possibility of leakage.

(5) The core metal fitting and the sleeve are integrally molded. The present invention can be applied even when the core metal fitting and the sleeve are integrally molded.

(6) The window is made of a transparent member. It is possible to easily confirm the occurrence of leakage by measuring the refractive index using a refractive index measuring device.

According to the present invention, it is possible to confirm the occurrence or possibility of fluid leakage by the colorant confirming means provided on the side in the direction in which the fluid leaks from the position where the colorant layer is formed. As a result, it is possible to reliably determine when to replace the hose, and it is possible to prevent contamination and failure of peripheral devices caused by leakage of fluid flowing through the hose.

It is a half-cut sectional view which shows the 1st Embodiment of this invention. It is a partially enlarged view of FIG. It is a half-cut sectional view which shows the 2nd Embodiment of this invention. It is a half-cut sectional view which shows the 3rd Embodiment of this invention. It is a half-cut sectional view which shows the 4th Embodiment of this invention. It is a half-cut sectional view which shows the 5th Embodiment of this invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a half-cut cross-sectional view showing the first embodiment of the hose joint of the present invention, and FIG. 2 is a partially enlarged view of FIG. As shown in the figure, the hose joint 10 includes a core fitting 30 having a tubular portion 31 inserted into the end of the hose 20 and an end of the hose 20 into which the tubular portion 31 of the core fitting 30 is inserted. It is provided with a sleeve 40 that is crimped and covered from the outside.

The outer peripheral surface 31a of the tubular portion 31 is in contact with the inner peripheral surface 20a at the end of the hose 20 so as to face it. Further, a plurality of stepped portions 32 extending in the circumferential direction are formed on the outer peripheral surface 31a of the tubular portion 31. The presence of the plurality of step portions 32 makes it difficult for the hose 20 to be pulled out.

On the other hand, at the other end of the core metal fitting 30, a tubular connecting portion 33 communicating with the tubular portion 31 is provided. The connecting portion 33 is connected to a connection target (not shown) of the hose 20. Between the connecting portion 33 and the tubular portion 31, an annular portion 34 adjacent to the connecting portion 33 and an abutting portion 35 with which the hose end surface 20a abuts when the hose 20 is inserted into the tubular portion 31 are provided. ing. The abutting portion 35 has a larger diameter than the tubular portion 31. A recess 36 is provided between the annular portion 34 and the abutting portion 35.

The sleeve 40 has a tubular shape, and a plurality of projecting portions 41-1 to 41-4 extending in the circumferential direction and projecting inward are provided on the inner peripheral surface 40a thereof at intervals in the axial direction. One end of the sleeve 40 is an annular locking portion 42 that fits into the recess 36 of the core fitting 30. Next to the locking portion 42 of the sleeve 40 is a contact portion 43 which is a portion in contact with the abutting portion 35 of the core metal fitting 30. The sleeve 40 and the core metal fitting 30 are integrated by fitting and crimping the locking portion 42 and the recess 36.

In the hose joint 10 having such a configuration, a fluid such as oil flowing inside the hose 20 due to aged deterioration of the hose 20 passes through a gap between the tubular portion 31 and the hose 20, and further. It flows out and leaks to the outside through the gap between the sleeve 40 and the hose 20 and the gap between the contact portion 43 and the locking portion 42 of the sleeve 40 and the abutting portion 35 and the recess 36 of the core metal fitting 30. In some cases. The present invention is for confirming the occurrence or possibility of such a leak.

In the present embodiment, a colorant layer 50 is formed on the inner peripheral surface 40a of the sleeve 40 as a means for confirming leakage, and the sleeve 40 is provided with a window 55 as a means for confirming the colorant. .. The window 55 is provided at a position opposite to the hose end surface 20b in the axial direction with respect to the position where the colorant layer 50 of the sleeve 40 is formed.

According to this configuration, the fluid flowing in the hose 20 passes through the gap between the hose 20 and the tubular portion 31 of the core fitting 30, and further leaks to the outside through the gap between the hose 20 and the sleeve 40. When flowing in the direction, the fluid flows with the colorant from the colorant layer 50. Then, by visually recognizing the presence of the colorant through the window 55, it is possible to confirm the occurrence of fluid leakage and its possibility.

The position of the window 55 in the sleeve 40 is such that the fluid flowing between the hose 20 and the tubular portion 31 of the core fitting 30 further leaks to the outside through the gap between the hose 20 and the sleeve 40. When it flows, it may be on the leaking direction side of the region where the colorant layer 50 is formed. That is, in the example shown in the figure, the window 55 is provided between the protrusions 41-3 and the protrusions 41-4 of the sleeve 40. For example, the protrusions 41-4 and The position may be between the core metal fitting 30 of the sleeve 40 and the end portion 40a on the side opposite to the connecting side.

However, as shown in the figure, since the window 55 is provided between the protrusions 41-3 and the protrusions 41-4, the fluid flowing through the gap between the hose 20 and the sleeve 40 can flow through the protrusions 41. If it stops before -4 and does not flow any further, by checking the presence of the colorant from the window 55, it is possible that leakage may occur before the fluid leaks to the outside. It becomes possible to confirm and prevent the leakage of fluid.

The windows 55 may be provided at one place or at a plurality of places. The size of the window 55 can be appropriately changed according to the size of the hose joint. The window 55 can be installed by hollowing out a part of the sleeve 40 and fitting a member (transparent member or the like) to be the window 55.

In the present embodiment, the colorant layer 50 is formed over the entire circumference of the inner peripheral surface 40a of the sleeve 40 in the region from the position corresponding to one end 20b of the hose 20 to the protrusions 41-3. However, the colorant layer may be formed only on a part of the inner peripheral surface thereof. The colorant may be any colorant as long as it can color the fluid flowing from the hose 20. For example, liquid dyes, coloring pigments, fluorescent materials and the like can be mentioned. In particular, it is preferable that a fluorescent material that fluoresces by irradiating with ultraviolet rays can be easily visually recognized by irradiation with ultraviolet rays. The colorant used may be liquid, powdery, granular, or highly viscous liquid, and the colorant layer 50 can be formed by impregnation, spraying, coating, or the like. In the present invention, the hose 20 may be any hose, a single-layer hose, or a multi-layer hose having a functional layer such as a protective layer.

FIG. 3 is a half-cut cross-sectional view showing a hose joint 60 according to a second embodiment of the present invention. The same configuration as in FIG. 1 is indicated by the same reference numerals, and the description thereof will be omitted. In the present embodiment, the colorant layer 51 is formed not on the inner peripheral surface of the sleeve 40 but on the outer peripheral surface 31a of the tubular portion 31 of the core metal fitting 30 over the entire circumference thereof. The axial length of the colorant layer 51 is a predetermined region from the position corresponding to one end 20b of the hose 20 to the end 31b of the tubular portion 31.

According to this configuration, when the fluid flowing in the hose 20 flows in the direction of leaking to the outside through the gap between the hose 20 and the tubular portion 31 of the core fitting 30 and between the hose 20 and the sleeve 40, By visually recognizing the colorant from the colorant layer 51 flowing together with the fluid through the window 55, it is possible to confirm the occurrence of leakage of the fluid and its possibility. Although the colorant layer 51 is formed over the entire circumference of the outer peripheral surface 31a of the tubular portion 31, it may be formed only on a part of the outer peripheral surface 31a.

FIG. 4 is a half-cut cross-sectional view showing a hose joint 70 according to a third embodiment of the present invention. The same configuration as in FIG. 1 is indicated by the same reference numerals, and the description thereof will be omitted. In the present embodiment, the colorant layer 51 is formed not on the inner peripheral surface of the sleeve 40 but on the outer peripheral surface 31a of the core metal fitting 31 as in the second embodiment. A window 56 is provided at the contact portion 43 of the sleeve 40.

The fluid that has passed between the hose 20 and the tubular portion 31 of the core metal fitting 30 passes through the gap between the contact portion 43 and the locking portion 42 of the sleeve 40 and the abutting portion 35 and the recess 36 of the core metal fitting 30. It may leak to the outside. In the present embodiment, the fluid passing between the hose 20 and the tubular portion 31 of the core fitting 30 together with the coloring agent from the coloring agent layer 51, the contact portion 43 and the locking portion 42 of the sleeve 40, and the core fitting. When the fluid flows in the direction of leaking to the outside through the gap between the abutting portion 35 and the recess 36 of 30, the fluid leaks by visually recognizing the presence of the coloring agent from the coloring agent layer 51 through the window 56. It is possible to confirm the occurrence or its possibility.

Integrated FIG. 5 is a half-cut cross-sectional view showing a hose joint 80 according to a fourth embodiment of the present invention. In the present embodiment, the core metal fitting 81 and the sleeve 82 are integrally molded to form an integral type. The colorant layer 83 is provided on the outer peripheral surface 84a of the tubular portion 84 of the core metal fitting 83. The window 85 is provided at the same location as in the first embodiment (see FIGS. 1 and 2). In the hose joint 80 having such a form, the fluid flowing in the hose 20 passes through the gap between the tubular portion 84 of the core metal fitting 81 and the hose 20, and further passes between the hose 20 and the sleeve 82 to the outside. The occurrence or possibility of leakage can be confirmed by visually recognizing the colorant from the colorant layer 83 flowing together with the fluid from the window 85 when the hose flows in the direction of leakage. In the present embodiment, the colorant layer 83 is provided on the outer peripheral surface 84a of the tubular portion 84 of the core metal fitting 81, but may be provided on the inner peripheral surface 82a of the sleeve 82.

Figure 6 is a cut in half cross-sectional view showing a hose fitting 90 in the fifth embodiment of the present onset bright. The same configuration as in FIG. 1 is indicated by the same reference numerals, and the description thereof will be omitted. In the present embodiment, a sensor 91 for detecting a leak is provided instead of the window as the colorant confirmation means shown in the first to fourth embodiments. Specifically, the sensor mounting member 92 is provided on the outer peripheral surface 40b of the sleeve 40, and the sensor 91 is provided on the sensor mounting member 92. A hole 93 is provided in the sensor mounting member 92, and the hole 93 also communicates with the sleeve 40 and reaches the inner peripheral surface 40a of the sleeve 40. When the fluid flows into the hole 93 together with the colorant and flows into the sensor mounting member 92, the sensor 91 detects the fluid containing the colorant. This makes it possible early and easily for the occurrence or possibility of leakage. The sensor may be any sensor that can detect the colorant.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the present invention. Also, any combination and replacement of each feature of the embodiments described above is possible. For example, by combining the second embodiment (FIG. 3) and the third embodiment (FIG. 4), the window is placed between the protrusions 41-3 and 41-4 of the sleeve 40, and the sleeve. It may be provided on both of the contact portions 43 of the 40. Further, by combining the first to third embodiments (FIGS. 1 to 4), the colorant layer is formed on both the outer peripheral surface 31a of the tubular portion 31 of the core metal fitting 30 and the inner peripheral surface 40a of the sleeve 40. In addition, windows may be provided between the protrusions 41-3 and 41-4 of the sleeve 40 and both in the contact portion 43 of the sleeve 40.

Further, in the above-described embodiment, the colorant layer is formed on the inner peripheral surface 40a of the sleeve 40 or on the outer peripheral surface 31a of the core metal fitting 30, but the present invention is not limited to these, and the core metal fitting 30 is not limited thereto. It may be formed between the abutting portion 35 of the hose and one end 20b of the hose 20. In addition to this, various combinations and replacements are possible.

10, 60, 70, 80, 90 Hose fittings 20 Hose 30 Core metal fittings 31 Hose contact tubular part 32 Step part 33 Connection part 34 Ring part 35 Butt part 36 Recessed part 40 Sleeve 41 Convex part 42 Locking part 43 Contact part 50, 51 Colorant layer

Claims (4)

A core fitting that is inserted into the hose end and has a tubular portion that faces the inner peripheral surface of the hose end, and a sleeve that crimps and covers the hose end into which the core fitting is inserted from the outside. In the hose joint that you have
A colorant layer is formed on the inner peripheral surface of the sleeve and / or the outer peripheral surface of the tubular portion of the core metal fitting.
When the fluid flowing in the hose flows through the gap between the hose and the tubular portion of the core fitting in the sleeve in the direction of leaking to the outside together with the colorant of the colorant layer, the sleeve. A colorant confirmation means for confirming the colorant flowing with the fluid is provided.
Position where the colorant confirmation means is provided in the sleeve, up direction side near which the fluid is the leakage from the position where the coloring agent layer is formed,
On the inner peripheral surface of the sleeve, a plurality of protrusions extending in the circumferential direction and protruding inward of the sleeve are formed at intervals in the axial direction of the sleeve.
The colorant confirming means is formed on the hose end side of the plurality of protrusions on the hose end side of the protrusion on the side most opposite to the hose end side .
The colorant confirmation means, the Ru Madodea visible fluid containing a coloring agent from the outside, the joint hose. The core metal fitting has an annular abutting portion adjacent to the tubular portion and facing the end face of the hose.
The inner peripheral surface of the sleeve has a contact portion that contacts and faces the outer peripheral surface of the abutting portion of the core metal fitting.
The hose joint according to claim 1, wherein the colorant confirming means is provided at the contact portion of the sleeve. The hose joint according to claim 1, wherein the core metal fitting and the sleeve are integrally molded. The hose joint according to claim 1 , wherein the window is made of a transparent member.

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