JPH0735893U - Fluid fitting - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a fluid coupling in which a male member and a female member are automatically separated when a tensile force of a certain amount or more is applied between the male and female members. [Structure] A male member 1 having an insertion tube portion 10 and a female main body 2
a and a female member 2 including an inner cylinder 2b, and the insertion cylinder 1
0 is a fluid coupling connected to the inner cylinder 2b in such a manner that the inner cylinder 2b can be moved forward and backward to one end of the female main body 2a and is urged to the other end by a spring B. The inner cylinder 2b is provided with a spherical body 3 on the wall forming the inner cylinder 2b so that the spherical body 3 can be retracted from the inner and outer peripheral surfaces of the inner cylinder 2b. Is provided in the female main body 2a, and a concave portion 21 is provided on one end side of the inner peripheral surface of the female main body 2a when the male / female member is connected. When the member 1 and the inner cylinder 2b move integrally against the biasing force of the spring B, the spherical body 3 is moved to the outside of the recess 11 by the wall of the recess 11 and is fitted into the recess 21 side. It is designed to be.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is for connecting pipes (hoses, tubes, etc.) for transferring liquid, gas, etc. to each other, and relates to a fluid coupling composed of a male member and a female member.

[0002]

[Prior art]

 Some automobiles use, for example, liquefied gas as a fuel.When the fuel is filled into this automobile, the gas storage tank and the gas supply unit on the automobile side are used for transfer in order to prevent the gas from being released into the atmosphere. Connected in an airtight manner via a hose. That is, it is necessary not only to insert the filling gun into the gasoline supply port as in the case of filling a vehicle with ordinary gasoline, but also to fix the filling gun to the gasoline supply section on the vehicle side in an airtight state at the time of gas filling. I won't.

However, in this type of vehicle, the filling gun is fixed to the gasoline supply section on the vehicle side as described above at the time of gas filling. Therefore, if the vehicle is accidentally started in the hose connected state, the transfer gun is transferred. There is a problem that the gas hose may be torn off or the gas storage tank may be damaged. Such a problem does not occur only when the gas is filled as described above.In addition, even when the self-propelled manipulator is so-called overrun, the transfer hose that feeds the hydraulic oil from the supply source to the manipulator side is provided. It may be torn off or damage the oil supply source.

In recent years, in response to the occurrence of the above situation, the male and female members are automatically separated when a tensile force of a predetermined amount or more is applied to the transfer hose, whereby the fluid supply source and the fluid charging source that move. It is desired to develop a fluid coupling that can be separated from the filling side without damage.

[0005]

[Problems to be solved by the device]

 Therefore, it is an object of the present invention to provide a fluid coupling in which a male / female member is automatically separated when a tensile force of a certain amount or more acts between the male / female member.

[0006]

[Means for Solving the Problems]

 The fluid coupling of the present invention comprises a male member 1 having an insertion cylinder portion 10 and a female member 2 composed of a female main body 2a and an inner cylinder 2b. The insertion cylinder portion 10 is connected to the inner cylinder 2b in a connected manner. In the fluid coupling, the inner cylinder 2b is internally mounted on one end of the female main body 2a in a state of being capable of advancing and retracting and being urged to the other end by a spring B. A spherical body 3 is provided so as to be retractable with respect to the inner and outer peripheral surfaces thereof, and a concave portion 11 is provided on the outer peripheral surface of the insertion tube portion 10 such that a part of the spherical body 3 is fitted when the male and female members are connected. A concave portion 21 is provided on one end side of the inner peripheral surface of the female main body 2a rather than the position of the concave portion 11 at the time of connecting the male and female members, and the male member 1 and the inner cylinder 2b are connected to each other via the sphere 3. When the sphere 3 moves integrally against the urging force of B, the spherical body 3 moves to the outside of the recess 11 due to the constituent wall of the recess 11. Is allowed dynamic are set to be in the fitted state recessed portion 21 side.

[0007]

[Action]

 This device has the following effects. In this fluid coupling, when a tensile force of a certain magnitude or more acts between the male and female members 1 and 2 in the connected state, the male member 1 and the inner cylinder 2b are biased by the spring B via the spherical body 3. The female main body 2a is integrally moved against the force so as to be separated from the female main body 2a.

Here, when the recessed portion 11 formed on the outer peripheral surface of the insertion cylinder portion 10 and the recessed portion 21 formed on the inner peripheral surface of the female main body 2a come to substantially face each other with the above movement, the spherical body 3 is moved to the outside of the recessed portion 11 by the wall of the recessed portion 11 and is fitted into the recessed portion 21 side. Therefore, the engagement between the male member 1 and the sphere 3 is completely released, and the male member 1 is separated from the female member 2.

[0009]

【Example】

 Hereinafter, the configuration of the present invention will be described with reference to the drawings shown as examples. In this embodiment, as shown in FIG. 1, a fuel supply device for an automobile, which uses LP gas as a fuel, is provided with a fluid coupling J of the present invention, and the filling gun G is mistakenly connected to the automobile. When the vehicle is started by means of a constant tension force on the fluid coupling J, the male member 1 and the female member 2 are automatically separated from each other, which may cause the fuel transfer hose H to be torn off. The gas supply device body S is prevented from being damaged. (Fluid Joint J of Example 1) As shown in FIG. 2, the fluid joint J basically includes a male member 1 having an insertion tube portion 10, a female member 2 including a female main body 2a and an inner tube 2b. The male / female members 1 and 2 are connected to each other in a manner that the insertion tube portion 10 is inserted into the inner tube 2b.

As shown in FIG. 2, the male member 1 has a tubular shape composed of a hexagonal tool corresponding portion 19 and an insertion tubular portion 10 that is connected to the hexagonal tool corresponding portion 19. As shown in the figure, the portion 10 has a large-diameter portion 10a having a peripheral groove 12 (corresponding to the recessed portion 11 in the column of means) on the outer peripheral surface of which is widened outward, and an insertion end side portion. It is composed of a small diameter portion 10c and a taper portion 10b between the large and small diameter portions 10a and 10c. As shown in FIG. 2, the cylindrical hole portion of the insertion cylindrical portion 10 is provided at a large hole portion 10d provided at a portion corresponding to the large diameter portion 10a and at a portion corresponding to the tapered portion 10b. The taper hole portion 10e and the small hole portion 10f provided in the portion corresponding to the small diameter portion 10c are provided, and the wall surface of the taper hole portion 10e is made to function as a valve seat of the valve body 40 described later. ing.

As shown in FIG. 2, the male member 1 is provided with a valve mechanism 4 for preventing the fluid from being discharged to the outside when the male and female members 1 and 2 are in a separated state. As shown in the figure, the valve mechanism 4 includes a valve body 40 having an O-ring 40a and a guide shaft 40b for ensuring fluid tightness as a valve, and the valve body 40 having the male member 1 A guide member 41 having a through hole 41a for holding a guide shaft 40b for advancing and retreating on the axis of the guide shaft and allowing a fluid flow, and a snap ring 42 for preventing the guide member 41 from coming out. And a compression coil spring 43 provided between the valve body 40 and the guide member 41 in order to urge the valve body 40 toward the insertion end side of the male member 1.

As shown in FIG. 2, the female member 2 has an inner cylinder 2b that is capable of advancing and retracting at one end of a female main body 2a. The inner cylinder 2b is provided with a compression coil spring 20 (a spring B in the section of means). Corresponding to each other). In this embodiment, the operation tube 5 is connected to the outer end portion of the inner tube 2b so that the male and female members 1 and 2 in the separated state can be connected by operating the operation tube 5. . The compression coil spring 20 has a spring constant such that the female main body 2a and the inner cylinder 2b are not separated from each other at a fluid pressure.

Further, as shown in FIG. 2, the female main body 2a is configured such that a thin-walled tubular member 2a ₂ is screwed to an end of the member 2a ₁ having a tool corresponding portion 25. cage, the circumferential grooves 22 extends toward the inner peripheral surface side (corresponding to the recessed portion 21 described in the column of means) provided from the outer peripheral surface side at one end of the 2a _2, while the said member 2a ₁ side The large hole portion 10d, the tapered hole portion 10e, and the small hole portion 10f, and the large hole portion 20d, the tapered hole portion 20e, the small hole portion 20f, and the open hole portion slightly larger in diameter than the small diameter portion 10c described above. It is equipped with 20 g, and the same one as the valve mechanism 4 is disposed inside. An O-ring 23 is attached to the wall of the open hole 20g, and the presence of the O-ring 23 allows the wall of the open hole 20g and the insertion tube to be connected when the male and female members 1 and 2 are connected. The fluid tightness between the small diameter portions 10c of the portion 10 is ensured.

As shown in FIG. 2, the inner cylinder 2b has a trumpet-shaped circular hole 24 (diameter on the inner peripheral surface side of the opening of the peripheral groove 11) that increases from the inner peripheral surface toward the outer peripheral surface. (Substantially equal to the width) at equiangular intervals, and the circular hole 24 is provided with a spherical body 3 capable of projecting and retracting with respect to the inner and outer surfaces of the cylindrical wall. Since the fluid coupling J according to the first embodiment has the above-described configuration, when the vehicle is accidentally started with the filling gun G connected to the vehicle, the male member 1 and the female member 2 are interlocked in the following modes. Becomes a separated state. ． The separating force corresponding to the starting force of the automobile acts on the male member 1 and the female member 2 mutually. Then, as shown in FIG. 3, due to the existence of the spherical body 3, the male member 1 and the inner cylinder 2b are integrally moved against the biasing force of the compression coil spring 20. ． Then, when the inner cylinder 2b is moved by a certain distance along with the movement of the male member 1, the sphere 3 is pushed outward by the inclined wall forming the circumferential groove 12 and, as shown in FIG. It will be in the inserted state. ． In the above state, as shown in FIG. 4, the spherical body 3 is in a state of being completely escaped from the circumferential groove 12, and the engagement between the inner cylinder 2b and the male member 1 by the spherical body 3 is completely released. Has become. Therefore, as shown in FIG. 5, the male member 1 can be separated from the female member 2.

In this state, as shown in the figure, the O-ring 40a portion of each valve body 40 is in pressure contact with the tapered hole portions 10e, 20e due to the presence of the compression coil spring 43, whereby the fluid is exposed to the outside air. The release can be avoided. Further, the inner cylinder 2b is returned to its original position as shown in FIG. 5 by the elastic return force of the compression coil spring 20, and the spherical body 3 projects from the circumferential groove 22 and a part of the circular hole 24 is formed. It is in a state of protruding from the inner peripheral side open part.

Next, a method of connecting the male member 1 and the female member 2 in the separated state as described above in the fluid coupling to each other will be described. ． First, the operation cylinder 5 is operated so that the inner cylinder 2b is separated from the member 2a ₁ of the female main body 2a, and the sphere 3 in the circular hole 24 and the circumferential groove 22 are substantially opposed to each other as shown in FIG. Let ． While maintaining the above state, the insertion cylinder portion 10 of the male member 1 is inserted into the inner cylinder 2b. Then, the sphere 3 in the circular hole 24 is gradually pushed up by the taper portion 10b so as to be fitted into the circumferential groove 22 as shown in FIG. 6, and the sphere 3 does not project from the inner peripheral surface of the inner cylinder 2b. This is the state (see FIG. 4). When the male member 1 is further inserted, the spherical body 3 is detached from the circumferential groove 22 and fitted into the circumferential groove 12 formed in the insertion tube portion 10, and the male member 1 and the female member 2 are connected as shown in FIG. Is connected. In this state, as shown in the figure, the valve elements 40, 40 are pushed in against the urging force of the compression coil spring 43, and the fluid is allowed to flow through this fluid coupling.

In this fluid coupling, as shown by an arrow FL in FIG. 2, the fluid path is defined by the flow hole 41 a of the guide member 41 (on the female member 2 side) → the valve body 40 and the inner wall of the female member 2. Space → space between the valve body 40 and the inner wall of the insertion cylinder 10 → the flow hole 41a of the proposed inner member 41 (on the male member 1 side). (Fluid Joint J of Example 2) This fluid joint J is intended to improve operability when the male member 1 and the female member 2 are connected, and as shown in FIG. The member 2 a ₂ portion of the female main body 2 a in FIG. ₂ is used as an operating portion (hereinafter referred to as an operating portion 5 ′), and a detent mechanism 6 for preventing unintentional turning of the operating portion 5 ′ is added.

The operation unit 5 ', as shown in the figure, member 2a ₁ and are screwed, reciprocating with respect to the member 2a ₁ is performed by the screw kinematic pair, the circumferential groove 22 other than the inner circumferential surface thereof Further, a peripheral groove 29 is further provided and a slit 28 into which the rotation stopping mechanism 6 is fitted is formed. As shown in FIG. 7, the rotation stopping mechanism 6 includes a hole 27 provided in the member 2a ₁ , a coil spring 60 provided in the hole 27, and a cap 61 provided at the free end of the coil spring 60. In the state where the cap 61 is pushed into the hole 27, the operation portion 5 ′ can be rotated in a screw pair state, and when the cap 5 is protruding from the hole 27 by the biasing force of the coil spring 60, The slit 28 is engaged with the constituent wall so that the operating portion 5'is not accidentally rotated.

Since the fluid coupling J of this embodiment is configured as described above, the separation mode of the male / female members 1 and 2 is the same as that of the first embodiment as shown in FIGS. The operation for bringing the male member 1 and the female member 2 into the connected state described below is as follows. First, with the cap 61 pushed in from the state shown in FIG. 10, the operating portion 5 ′ is rotated in order to reduce the screwing amount of the operating portion 5 ′ and the member 2a _1, and as shown in FIG. The groove 29 and the circular hole 24 are set to face each other.

In this state, the insertion cylinder portion 10 of the male member 1 is inserted into the inner cylinder 2b. Then, the sphere 3 in the circular hole 24 is gradually pushed up by the tapered portion 10b so as to be fitted into the circumferential groove 29 as shown in FIG. 11, and the sphere 3 is moved to the inner cylinder 2b as shown in FIG. It does not project from the inner peripheral surface. When the male member 1 is further inserted until it cannot be pushed in, the circumferential groove 12 and the circular hole 24 in which the spherical body 3 is located are substantially opposed to each other, and the spherical body 3 is inserted into the circumferential groove 12 on the insertion tube portion 20 side. It is ready to be inserted. After that, when the operating portion 5 ′ is screwed into the member 2a ₁ , the spherical body 3 is pushed into the peripheral groove 12 by the inclined wall forming the peripheral groove 29 and is fitted into the peripheral groove 12. That is, the male member 1 and the female member 2 are in a connected state.

As shown in FIGS. 13 and 14, the female member 2 of the fluid coupling J is fixed to the bracket BK, and the fluid coupling J and the filling gun are fixed by a pair of rollers R and R provided on the bracket BK. If the transfer hose H interposed between the Gs is sandwiched, no matter which direction the filling gun G is pulled, the pulling force acts on the fluid coupling J in the axial direction thereof. The male and female members 1 and 2 are smoothly separated from each other.

[0022]

[Effect of device]

 From the content described in the action, it is possible to provide a fluid coupling in which the male and female members are automatically separated when a tensile force of a certain amount or more acts between the male and female members.

[Brief description of drawings]

FIG. 1 is an external view of a fuel supply device provided with a fluid coupling according to an embodiment of the present invention.

FIG. 2 is a half sectional view of the fluid coupling according to the first embodiment of the present invention.

FIG. 3 is a half cross-sectional view showing a state in which the male member and the middle cylinder are integrally moved in the fluid coupling.

FIG. 4 is a half cross-sectional view showing a state in which the male member has moved further from FIG. 3 and the spherical body has been pushed up into the peripheral groove on the female main body side by the large-diameter portion constituting wall of the insertion tubular portion of the male member.

FIG. 5 is a half sectional view showing a state in which a male member and a female member in the fluid coupling are separated.

FIG. 6 is a judgment surface view showing a state in which an operating portion is pulled out to bring a fluid coupling in a separated state into a connected state.

FIG. 7 is a half sectional view of a fluid coupling according to a second embodiment of the present invention.

FIG. 8 is a half cross-sectional view showing a state in which the male member and the middle cylinder are integrally moved in the fluid coupling.

FIG. 9 is a half cross-sectional view showing a state where the male member is further moved from FIG. 8 and the spherical body is pushed up to the peripheral groove on the female main body side by the large-diameter portion constituting wall of the insertion cylinder portion of the male member.

FIG. 10 is a half sectional view showing a state where a male member and a female member in the fluid coupling are separated.

FIG. 11 is a half cross-sectional view showing a state in which the operation portion is slightly unscrewed to bring the fluid coupling in the separated state into the connected state.

FIG. 12 is a half cross-sectional view showing a state where the male member is further pushed into the female member from the state of FIG. 11 and the spherical body is fitted in the circumferential groove formed in the operation portion.

FIG. 13 is an external view of a fuel supply device of another embodiment provided with the fluid coupling of the embodiment of the present invention.

FIG. 14 is a plan view of a roller arrangement portion of the fuel supply device in FIG.

[Explanation of symbols]

 B spring 1 male member 2 female member 2a female main body 2b inner cylinder 3 sphere 10 insertion cylinder part 11 recessed part 21 recessed part

Front page continuation (72) Shinichi Nagai 1300 45, Yawata, Nabari-shi, Mie 45, Nitta Moore Co., Ltd. Nabari factory

Claims (1)

[Scope of utility model registration request] 1. A male member (1) having an insertion tube portion (10).
And a female member (2) comprising a female main body (2a) and an inner cylinder (2b), wherein the insertion cylinder part (10) is connected in a manner to be inserted into the inner cylinder (2b). , The inner cylinder (2b) is internally mounted to one end of the female main body (2a) so as to be capable of advancing and retracting and being urged to the other end by a spring (B),
A spherical body (3) is provided on the constituent wall of the inner cylinder (2b) so as to be retractable from the inner and outer peripheral surfaces of the inner cylinder (2b).
0) on the outer surface of the sphere (3) when connecting the male and female members
Is provided with a recessed part (11) in which a part of the recessed part is fitted, and the recessed part (21) is located on one end side of the recessed part (11) on the inner peripheral surface of the female main body (2a) when the male and female members are connected. ) Is provided, and the male member (1) and the inner cylinder (2b) are connected via the sphere (3).
When and move integrally against the biasing force of the spring (B),
The spherical body (3) has a concave portion (1
1) A fluid coupling characterized in that it is moved to the outside so as to be fitted into the recess (21) side.