JP3027761U - Fluid fitting - Google Patents

Abstract

(57) [Abstract] [Purpose] Either metal or plastic can be selected according to the nature of the fluid to be handled, it can be easily manufactured, and the connection work is easy and there is no leakage. An object is to provide a fluid coupling that can be connected. [Structure] The fluid coupling 1 is composed of a tubular body 2, a slit ring 3, and an outer ring 4. A retaining flange 8 and an annular protrusion 9 are provided on the outer wall of the tubular body 2. On the inner wall of the area of the slit ring 3 where the slit 12 is formed, an engaging portion 11 that engages with the retaining flange 8 and an annular recessed portion 13 that faces the annular protruding portion 9 are provided. The hose end 7 is sandwiched between the tubular body 2 and the slit ring 3, and the tubular body 2 is inserted through the slit ring 3.
Pressed against the outer wall of the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a fluid coupling used at a connection portion of an end of a hose.

[0002]

[Prior art]

 Conventionally, the hose end is connected by fitting the hose end to the fitting pipe, tightening the hose end to the fitting pipe with a metal band wrapped outside the hose end, or fitting it to the outside of the hose end. This is done by screwing a cylindrical lock nut to the end of the fitting pipe and pressing the inner wall of the hose end against the outer wall of the fitting pipe through the movement of the lock nut close to the fitting pipe at the time of joining. Was there.

[0003]

[Problems to be solved by the device]

 In the connection structure of the hose end as described above, the structure using the metal band has a problem that the metal band is easily rusted and the connection part is easily deteriorated. Also, if the fluid that flows through the hose is a fluid that reacts with metal, such as chemicals, the metal band reacts with the fluid at an early stage, causing leakage at the connection, and other problems that may lead to unpredictable results. There was also. On the other hand, in the structure using the lock nut, it was possible to make the joint pipe and the lock nut made of plastic to accommodate fluids such as chemicals, but it was necessary to form threads for each. In addition to high manufacturing costs, there were problems such as the threads becoming worn during repeated use, and the powder produced by the wear mixed into the fluid as impurities.

The present invention has been made in view of the above problems, and either metal or plastic can be selected according to the property of the fluid to be handled, and it can be easily manufactured, and the connection work is easy. In addition, it is an object of the present invention to provide a fluid coupling capable of reliable connection without leakage.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention provides a cylindrical body to which a hose end is fitted, and a hose end that is fitted outside the tubular body. A fluid coupling comprising a tubular slit ring having slits along the longitudinal direction on a side wall and a tubular outer ring fitted on the outside of the slit ring, wherein the outer wall of the tubular body is provided. The latching flange is provided, and the annular protrusion is provided closer to the tip than the latching flange, and the engaging portion that engages with the latching flange is formed on the inner wall of the slit-formed region of the slit ring. And a ring-shaped recess facing the ring-shaped protrusion.

The annular protruding portion of the tubular body is shown as having one line in the embodiment, but it may be formed as a plurality of lines. An annular fold can also be provided on the slope of this annular protrusion. The annular projection and the annular recess provided in the slit ring are intended to prevent the end of the hose sandwiched between them from moving in the longitudinal direction, and the shape is not specified. If the cross-sectional shapes of both are similar, it is desirable in that the end of the hose is housed in the gap between the annular protrusion and the annular recess without any gap. The number of slits provided on the side wall of the slit ring may be one, but it is desirable to provide a plurality of slits at equal intervals. In addition, it is desirable that the outer ring be provided with an annular protrusion on the outer wall in terms of the operation of fitting to and removing from the outer side of the slit ring. The cylindrical body, the slit ring, and the outer ring can be made of metal or plastic. Furthermore, it is also possible to mix and manufacture metal and plastic products.

[0007]

[Action]

 According to the fluid coupling of the present invention, each of them is a cylindrical member, and since there is no screw portion, it is possible to easily manufacture each member made of metal or plastic. The hose end is sandwiched between the tubular body and the slit ring, and the outer ring is fitted on the outside of the slit ring to complete the connection of the hose end. The hose end is pressed against the outer wall of the tubular body via the slit ring to obtain airtightness, and the hose end is housed in the gap between the annular protrusion of the tubular body and the annular recess of the slit ring. As a result, the end of the hose is prevented from coming off. The engaging portion of the slit ring engages with the retaining flange of the tubular body, and this state is maintained by the fitting of the outer ring, so that the slit ring is prevented from being unintentionally disengaged.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 and 2 show the entire fluid coupling 1 of the embodiment, FIG. 3 shows a tubular body 2 constituting the fluid coupling 1, and FIGS. 4 and 5 show a slit ring 3 similarly. FIG. 6 also shows the respective outer rings 4.

The tubular body 2 is a tubular body whose base end side can be connected to a fluid device such as a container or a pipe, and a screw 5 is formed on the outer wall of the base end portion, and is adjacent to the screw 5. Hexagonal body 6 is installed in the middle. Further, in order to fit and connect the hose end portion 7 to the tip end side, apart from the hexagonal cylinder 6, a hooking flange 8 is annularly provided on the outer wall on the tip end side, and from this hooking flange 8. An annular protrusion 9 is provided near the tip. The annular projecting portion 9 is provided with an inclined surface 9a facing the latching flange 8 side and an inclined surface 9b facing the tip side of the tubular body, and the fold 10 is formed in an annular shape on the inclined surface 9b.

The slit ring 3 is a tubular body that can be fitted to the front end side of the tubular body 2 up to the latching flange 8, and the hose end portion 7 is provided between the tubular body 2 and the slit ring 3. The inner diameter is such that the hose end 7 can be pressed and the hose end 7 can be pressed toward the cylindrical body 2 side. In order to engage with the retaining flange 8 of the tubular body 2 when it is fitted into the tubular body 2, an engaging portion 11 formed of an annular ridge is provided inside one end, and at the time of fitting. In addition, four slits 12 are provided at equal intervals along the longitudinal direction so that the engaging portion 11 can get over the retaining flange 8. The slit 12 extends from one end of the slit ring 3 to a position facing the annular protrusion 9 of the tubular body 2. An annular recess 13 having a cross-sectional shape similar to that of the annular protrusion 9 is provided on the inner wall of the region where the slit 12 is provided, at a position facing the annular protrusion 9 of the tubular body 2. There is. The annular recessed portion 13 includes an inclined surface 13a that faces the inclined surface 9a of the annular protruding portion 9 and an inclined surface 13b that faces the inclined surface 9b.

The inner edge of the engaging portion 11 is formed with a rounded surface 14 so that the engagement flange 11 can be smoothly climbed onto the latching flange 8. However, the latching flange 8 side can also be a rounded surface. The rounded surface can be a slope.

The outer ring 4 is a tubular body having a length substantially equal to that of the slit ring 3 so that the outer ring 4 can be fitted to the outside of the slit ring 3 without a gap, and has a flange 15 formed on one outer wall of the slit ring 3. Correspondingly, an annular step portion 16 is formed on the inner wall. Moreover, an annular projection 17 is provided on the outer wall so that the outer ring 4 can be easily fitted and removed. The outer wall of the outer ring 4 on the other end side is tapered with a tapered surface 18 so that the outer diameter of the outer ring 4 does not change abruptly compared with that of the hose end 7.

In order to connect the hose end 7 with the fluid coupling 1 of the above embodiment, the hose end 7 is inserted into the slit ring 3 and the outer ring 4 so as to protrude. The slit ring 3 and the outer ring 4 are separated from each other without being fitted to each other. Then, the hose end portion 7 protruding from the slit ring 3 is fitted to the tip end side of the tubular body 2 so as to cover the annular protruding portion 9. Next, the slit ring 3 is moved to the hose end 7 side, the annular recess 13 is made to face the annular protrusion 9, and the engaging portion 11 made of an annular ridge is engaged with the retaining flange 8. And keep it in place. The side wall of the slit ring 3 in the region where the slit 12 is provided can be expanded outwardly, and when the slit ring 3 is moved to the hose end 7 side, the engaging portion 11 first moves the annular protrusion 9 Get over the part of the hose end 7 that is huge outside. The rounded surface 14 formed on the inner edge of the engaging portion 11 is advantageous in that the wall surface of the hose end portion 7 is not damaged. Next, the engaging portion 11 has passed over the latching flange 8, and when the riding over is completed, the expanded state of the side wall is restored, and the engaging portion 11 and the latching flange 8 are engaged with each other. The slit ring 2 will not come off.

As described above, the outer ring 4 is moved to the slit ring 3 side after the slit ring 3 is fitted to the outer side of the tubular body 2 with the hose end portion 7 interposed therebetween. The inner diameter of the outer ring 4 is substantially equal to the outer diameter of the slit ring 3 so that the outer ring 4 can move smoothly, and the annular step portion 16 of the outer ring 4 engages with the flange 15 of the slit ring 3 to stop the movement, and the hose end portion 7 connection is completed.

In the above-mentioned connected state, the inner wall of the hose end 7 is pressed against the outer wall of the tubular body 2, and the airtightness of the connecting portion is maintained. When the annular pleats 10 are provided on the sloped surface 9b of the annular protrusion 9 of the tubular body 2, the pleats 10 bite into the inner wall of the hose end 7 to obtain high airtightness. Even if a force is applied to the hose end 7 in the pulling direction, the hose end 7 is sandwiched between the tubular body 2 and the slit ring 3, and the slit ring 3 fits into the outer ring 4. Since the tubular body 2 is provided with an annular projection 9 in a state where it cannot be expanded due to mounting, there is no risk of the hose end 7 coming off. The movement of the hose end 7 in the rotational direction is limited only by the pressure of the slit ring 3 pressing the hose end 7 toward the tubular body 2. Therefore, when a force in the rotational direction is applied to the hose end portion 7, the hose end portion 7 can gradually move in the rotational direction, and the hose end portion 7 absorbs the rotational direction force so that the hose is not twisted. Can be

As described above, according to the fluid coupling 1, the outer wall or the inner wall of each member is provided with the protrusion or the recess, and the screw 5 is provided on the outer wall of the tubular body 2 on the proximal end side. Therefore, it is possible to easily manufacture and reduce the manufacturing cost. The material can be freely selected, and it can be made of metal or plastic depending on the properties of the fluid, and the fluid coupling 1 can be made free from deterioration due to use. Of course, the cylindrical body 2 may be made of plastic, and the slit ring 3 and the outer ring 4 may be made of metal.

As described above, the hose end 7 may be connected by fitting the hose end 7 to the tubular body 2 and then sequentially moving the slit ring 3 and the outer ring 4 to fit them. The operation for removing the hose end 7 may be performed in the reverse order, and connection and disconnection can be easily performed. In the state where the hose end 7 is connected, the hose end 7 is pressed against the outer wall of the tubular body 2 through the slit ring 3 to form a reliable airtight state, and at the time of connection, the portion to be screwed is connected. Since it does not exist, powders and the like due to wear do not occur, and the risk of impurities mixing into the fluid can be eliminated.

In the fluid coupling 1 of the embodiment, the tubular body 2 is provided with one annular protrusion 9, and the slit ring 3 is also provided with one annular recess 13 correspondingly. However, each may be provided in two or more articles. It is determined in consideration of the diameter and wall thickness of the hose end 7. Further, the pleats 10 formed on the slope 9b of the annular protrusion 9 are not essential, and can be provided or omitted in consideration of the fluid pressure, the allowable amount of leakage, and the like. The shapes of the annular protruding portion 9 and the annular recessed portion 13 do not necessarily have to have similar cross-sectional shapes as in the embodiment. It suffices that a part of the hose end portion 7 that bulges outward by the annular protrusion 9 can be accommodated.

The number of the slits 12 of the slit ring 3 may be one, two, three, or five or more. It suffices if the area in which the slit 12 is formed can be expanded. Further, the annular protrusion 17 provided on the outer wall of the outer ring 4 may be omitted, or other means such as forming a diamond knurl on the entire outer wall may be used. In addition, the protrusion 19 may be formed on the slit ring 3 to improve the stopping of the hose 7.

[0020]

[Effect of device]

 According to the present invention, there is an effect that it is possible to provide a fluid coupling in which a material such as metal or plastic is selected according to the property of a fluid, there is no fear of deterioration due to reaction, and which can be easily manufactured. In addition, there is an effect that the work of connecting and disconnecting the end of the hose can be easily performed, a leak-free connection state can be obtained, and a fluid coupling in which impurities such as abrasion powder are not mixed in the fluid can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a side view of the same embodiment.

FIG. 3 is a front view of the cylindrical body of the embodiment as well.

FIG. 4 is a sectional view of the slit ring of the embodiment.

FIG. 5 is a side view of the slit ring of the embodiment.

FIG. 6 is a sectional view of an outer ring of the same embodiment.

[Explanation of symbols]

 1 Fluid Joint 2 Cylindrical Body 3 Slit Ring 4 Outer Ring 5 Screw 6 Hexagonal Body 7 Hose End 8 Hooking Flange 9 Annular Projection 9a, 9b Sloped Surface of Annular Projection 10 Fold 11 Engagement 12 Slit 13 Annular Recess 13a, 13b Sloping surface of annular recessed portion 14 R-face 15 Flange 16 Annular step 17 Annular ridge 18 Tapered surface 19 Protrusion

Claims (8)

[Scope of utility model registration request] 1. A cylindrical body 2 in which a hose end 7 is fitted, and a slit 12 along a longitudinal direction in a side wall which is fitted on the outside of the cylindrical body 2 with the hose end 7 interposed therebetween.
With a cylindrical slit ring 3 and a slit ring 3
A tubular outer ring 4 fitted to the outside of the tubular body 2, wherein a hooking flange 8 is provided on the outer wall of the tubular body 2, and the tip end of the hooking flange 8 is closer than the hooking flange 8. An annular protrusion 9 is provided in the slit 12 of the slit ring 3.
A fluid coupling, characterized in that an engagement portion 11 that engages with the retaining flange 8 and an annular recessed portion 13 that opposes the annular protrusion 9 are provided on the inner wall of the region where the above is formed. 2. The annular protrusion 9 of the tubular body 2 is
Alternatively, the fluid coupling according to claim 1, which has a plurality of lines. 3. The fluid coupling according to claim 1, wherein the annular projection 9 of the tubular body 2 has an annular fold 10 formed on the slope 9b. 4. The fluid coupling according to claim 1, wherein the annular projecting portion 9 of the tubular body 2 and the annular recessed portion 13 of the slit ring 3 have similar cross-sectional shapes. 5. The fluid coupling according to claim 1, wherein the slit ring 3 is provided with a plurality of slits 12 at equal intervals. 6. The fluid coupling according to claim 1, wherein the outer ring 4 is provided with an annular ridge 17 on the outer wall thereof. 7. The fluid coupling according to claim 1, wherein the tubular body 2, the slit ring 3 and the outer ring 4 are made of metal. 8. The fluid coupling according to claim 1, wherein the tubular body 2, the slit ring 3 and the outer ring 4 are made of plastic.