JP5249846B2 - Misconnection prevention device and misconnection prevention structure - Google Patents

Description

The present invention originally prevents a misconnection prevention device and a misconnection prevention that prevent a hose (for example, a gas hose) connected to a plug via a joint member from being directly connected to a plug provided in a gas device or the like. Concerning structure.
The erroneous connection prevention device and the erroneous connection prevention structure proposed in the present application do not exist in the past, but have been developed by the inventors based on their own problems as a result of earnest research.

  Patent Document 1 discloses a structure in which a gas hose is connected to a plug provided in a gas rice cooker as an example of a gas appliance via a joint member that is a subject of the present application. In the invention according to Patent Document 1, the plug is provided with connection detection means, thereby reliably detecting the normal connection state of the gas cord to the plug of the gas device and the erroneous connection state of the gas hose.

JP 2006-83989 A

  First, in this application, the connection to the plug 40 of the hose 10 through the joint member 20 which is the premise will be described based on the drawings. FIG. 1 shows the structure of the joint member 20, and FIG. 2 shows the structure of the plug 40. FIG. 1 shows a closed state where the joint member 20 is not connected to the plug 40 and the outflow of fluid from the tip of the joint member 20 is stopped. On the other hand, in FIG. 3, the joint member 20 is connected to the plug 40, and the fluid flow path 22 is formed across the hose 10, the joint member 20, and the plug 40, from the hose 10 side to the gas equipment (not shown) side. This shows a state where gas can be supplied. In this state, the joint member 20 is in an open state in which the outflow of fluid from the tip is allowed.

  Hereinafter, the configuration of 1 joint member 20, 2 the configuration of plug 40, 3 the connection operation of joint member 20 to plug 40, and 4 the separation operation of joint member 20 from plug 40 will be described in this order using these drawings. .

1 Configuration of Joint Member 20 As shown in FIG. 1, the joint member 20 is roughly composed of a connector 11 to which the hose 10 is connected, a cylindrical main body 21 connected to the connector 11, and an axial direction inside the cylindrical main body 21. A movable actuating member 33, a sleeve member 34 movable in the axial direction at the outer peripheral portion of the cylindrical main body 21, and a non-connector side of the cylindrical main body 21. A locking ball 35 whose position is regulated is provided. Between the connector 11 and the actuating member 33, a first coil spring 31 that is a biasing member that biases the actuating member 33 toward the distal end side that is the non-connector side with respect to the connector 11 is provided. Between the sleeve member 34 and the sleeve member 34, a second coil spring 32, which is a biasing member that biases the sleeve member 34 toward the distal end side with respect to the cover member 23, is provided.

Furthermore, the cover member 23 provided on the joint member 20 is mainly used for an operator to hold the joint member 20 when the joint member 20 is connected to the plug 40.
The joint member 20 is provided with a tip member 24 for positioning the locking ball 35 from the tip side.

  The sleeve member 34 provided in the joint member 20 is movable in the axial direction with respect to the cylindrical main body 21 and the tip member 24. As can be seen from FIG. 1, in the above-described closed state, the sleeve member 34 is located at the same position as the end member 24 with respect to the end member 24. On the other hand, as can be seen from FIG. 3, in the above-described open state, the sleeve member 34 is positioned at a position where the sleeve member 34 protrudes toward the distal end side with respect to the distal end member 24.

A non-connector side portion in the axial direction of the sleeve member 34 is provided with a first restricting surface 25 for restricting the locking ball 35 to the outer diameter side portion, and from the first restricting surface 25 to the connector side, A second restricting surface 26 for restricting the locking ball 35 to the inner diameter side portion is provided.
In the closed state shown in FIG. 1, due to the positional relationship between the locking ball 35 and the sleeve member 34, the radial movement of the locking ball 35 is restricted by the first restriction surface 25, and the operating member 33 moves to the non-connector side. With the moved closed posture, the outflow of fluid from the joint tip on the non-connector side is stopped.
On the other hand, in the open state shown in FIG. 3, due to the positional relationship between the locking ball 35 and the sleeve member 34, the radial movement of the locking ball 35 is restricted by the second restriction surface 26, and the operating member 33 moves to the connector side. In such an open position, fluid outflow from the joint tip is allowed. Therefore, the joint member 20 is configured to be switchable between a closed state and an open state.

2 Configuration of Plug 40 As shown in FIG. 2, the plug 40 is configured to include a plug body 45 and a connecting portion to which the joint member 20 is connected, and an internal fluid flow path 46 extending from the distal end to the proximal end in the axial direction. The first annular portion 41, the locking groove portion 42 that receives the locking ball 35, and the second annular portion 43 are sequentially provided from the distal end side to the proximal end side of the connection portion.
In the example shown in the figure, the first annular portion 41 and the second annular portion 43 are configured to have the same diameter, and the lock groove portion 42 is configured as a substantially triangular groove in a sectional view.
Further, the plug 40 includes a small-diameter portion 44 having a larger diameter than the second annular portion 43 on the proximal end side from the second annular portion 43. Further, a plug main body 45 having a larger diameter than the small diameter portion 44 is provided on the base end side.
The relationship between the small-diameter portion 44 and the plug main body 45 and the sleeve member 34 described above is such that the outer diameter of the small-diameter portion 44 is smaller than the inner diameter of the sleeve member 34 as shown in FIG. The outer diameter is set to be larger than the outer diameter of the sleeve member 34, and the sleeve member 34 is configured to externally fit the small diameter portion 44 when the sleeve member 34 protrudes in the open state.

3 Connection operation of the joint member 20 to the plug 40 When connecting the joint member 20 to the plug 40, the operator holds the cover member 23 of the joint member 20 and causes the plug 40 to enter the inside of the joint member 20. . In this state, the joint member 20 is in the closed state shown in FIG. In the entering operation, the tip of the plug 40 abuts on the tip of the operating member 33 and pushes in the operating member 33. In this situation, the joint member 20 is switched from the closed state shown in FIG. 1 to the open state shown in FIG. 3. However, as the plug 40 enters the joint member 20, the locking ball 35 is moved to the lock groove portion 42. The sleeve member 34 biased toward the distal end is released from the proximal position by the locking ball 35, and the sleeve member 34 projects toward the distal end. This state is the open state shown in FIG.

4 Separation operation of the joint member 20 from the plug 40 In the separation operation of the joint member 20 from the plug 40, the operator holds the sleeve member 34 of the joint member 20 and holds the sleeve member 34 at the base end of the joint member 20. Move to the side. In the state before the movement, the joint member 20 is in an open state shown in FIG. In the moving operation, the operator moves the sleeve member 34 to the proximal end side against the urging force of the second coil spring 32, so that the first regulating surface 25 of the sleeve member 34 has the locking ball in the axial direction. The locking ball 35 is detached from the locking groove 42 at a position opposite to the locking groove 35. As a result, the sleeve member 34 is held at the proximal end side by the locking ball 35 and the joint member 20 is separated from the plug 40. This state is the closed state shown in FIG.

  The present invention relates to the occurrence of a normal connection state in which a hose is connected to a plug provided in a gas appliance through a joint member and an erroneous connection state in which the hose is directly connected to the plug. The purpose of this is to positively prevent the occurrence of an erroneous connection state by attaching the erroneous connection prevention device referred to herein to the plug.

In order to achieve the above object, an erroneous connection preventing apparatus according to the present invention includes a connector to which a hose is connected, a cylindrical main body connected to the connector, an operating member movable in the axial direction within the cylindrical main body, A sleeve member that is movable in the axial direction at the outer peripheral portion of the cylindrical main body, and a locking ball that is positioned on the non-connector side of the cylindrical main body, and whose axial radial position is restricted by the inner diameter surface of the sleeve member. A first restricting surface for restricting the locking ball to an outer diameter side position at a non-connector side portion in the axial direction of the sleeve member, and the locking ball provided on the connector side from the first restricting surface. A second restricting surface that restricts the position, and the locking ball is restricted from moving in the radial direction by the second restricting surface, and the actuating member moves to the connector side in a non-connecting state. In an open state in which the outflow of fluid from the joint tip on the side of the joint is permitted, and in a closed posture in which the locking ball is restricted from moving in the radial direction by the first restricting surface and the operating member is moved to the non-connector side. A joint member configured to be switchable between a closed state in which the outflow of fluid from the joint tip is stopped,
A plug main body and a connecting portion to which the joint member is connected; an internal fluid passage extending from the axial tip to the base end; and a first annular shape from the tip of the connecting portion toward the base end Part, a locking groove part for receiving the locking ball and a hose connection structure for connecting to a plug having a second annular part,
The characteristic configuration includes a cylindrical casing, a movable member that is movable in the axial direction with respect to the cylindrical casing, and a biasing member that biases the movable member from the proximal end side to the distal end side of the cylindrical casing. Configured
The cylindrical housing, the movable member, and the biasing member have inner diameters larger than the outer shapes of the first annular portion and the second annular portion, and the cylindrical housing, the movable member, and the biasing member are the first annular portion and the first annular portion. It is configured to be attachable to the outer diameter part of the two annular parts,
The movable member is configured to be movable in the axial direction along the outer peripheral surface of the second annular portion, and the outer diameter of the movable member is configured to be smaller than the inner diameter of the sleeve member,
In the connection operation for connecting the joint member to the plug, the movable member is retracted into the cylindrical housing, and the joint member is allowed to change from the closed state to the open state.

  The erroneous connection prevention device of the present application mainly exhibits its function in a state where it is attached to a plug provided in a gas appliance or the like. Hereinafter, the operational effects and functions of the misconnection prevention device of the present application in a state where the misconnection prevention device of the present application is attached to the plug will be described.

According to the above-described characteristic configuration of the present application, when the operator makes a normal connection in which the joint member enters the plug, the outer diameter of the movable member is smaller than the inner diameter of the sleeve member. Then, it comes into contact with the distal end member on the inner diameter side of the sleeve member and is pushed into the proximal end side of the plug. At the same time, the actuating member is pushed toward the non-connector side by contact with the tip of the plug, so that the locking ball is allowed to enter the ball groove portion, and the joint member and the plug are normally connected. In this state, the locking ball that has fixed the sleeve member to the non-connector side is regulated from the first regulating surface at the outer diameter side to the second regulating surface at the inner diameter side. Projects to the tip side.
When the joint member and the plug are in a normal connection state, the locking ball whose position is regulated to the inner diameter side position by the second regulating surface is fitted in the lock groove, so that the movable member is located inside the sleeve member. Even if the front end member is pressed, the connection between the joint member and the plug is maintained.
On the other hand, when an operator makes an incorrect connection for causing the hose to enter the plug, the operator usually uses a hose having an inner diameter smaller than the outer diameter of the plug. In this case, the inner diameter of the hose is naturally smaller than the outer diameter of the movable member. For this reason, the tip of the hose comes into contact with the tip of the movable member. In this state, when the hose enters the plug, the movable member is urged toward the distal end side of the plug by the urging member, so that the hose is pushed back by the movable member, and erroneous connection of the hose to the plug can be avoided. .
From the above, the joint member can be safely connected to the plug to achieve and maintain a normal connection state, and the misconnection that the hose is connected to the plug is released to actively prevent the misconnection state. A prevention device can be realized.

  A further characteristic configuration of the erroneous connection preventing device according to the present invention is that the movable member is urged by the urging member, and the movable member protrudes from the cylindrical housing so that the movable member protrudes from the cylindrical housing. In the mounted state, the distal end of the movable member is positioned closer to the plug proximal end than the distal end of the plug.

  According to the above characteristic configuration, when the movable member is attached to the plug, the movable member protrudes from the cylindrical housing in a natural state where the movable member protrudes from the cylindrical housing, and the distal end of the movable member is the distal end of the plug. By being positioned closer to the base end of the plug, the tip of the plug can be exposed to the outside. Thus, the operator can relatively easily align the shaft core of the joint member and the shaft core of the plug. As a result, the joint member and the plug can be reliably connected.

  A further characteristic configuration of the erroneous connection preventing device according to the present invention is that the movable member is urged by the urging member, and the movable member protrudes from the cylindrical housing so that the movable member protrudes from the cylindrical housing. In the mounted state, the distal end of the movable member protrudes forward from the distal end of the plug.

  According to the above characteristic configuration, when the movable member is attached to the plug, the distal end of the movable member is plugged in a natural state in which the movable member assumes a movable member protruding posture in which the movable member protrudes from the cylindrical housing. The entire plug can be completely covered with the movable member by protruding forward from the tip of the. Thereby, since it will be in the state where the plug is not exposed outside, an operator can make it difficult to attach a hose to a plug. Thereby, the misconnection with respect to the plug of a hose can be prevented beforehand.

  A further characteristic configuration of the erroneous connection preventing device according to the present invention is that the distal end portion of the movable member has a tapered shape in which the outer diameter is reduced toward the distal end side.

  According to the above characteristic configuration, the distal end portion of the movable member has a tapered shape whose outer diameter is reduced toward the distal end side, so that when the hose is forced into the plug, the distal end of the hose Can be expanded outward in the axial direction at the tip of the movable member. Thereby, the force by which the hose is pushed toward the proximal end side of the plug in the axial direction can be released to the outside in the axial radial direction. As a result, the hose is less likely to be pushed into the proximal end side of the plug, and erroneous connection can be prevented even better.

  A further characteristic configuration of the erroneous connection preventing apparatus according to the present invention is that the distal end portion of the movable member is separated by a plurality of notches provided from the distal end toward the proximal end side along the axial direction. Each of the plurality of divided tip portions is in contact with the end portion of the tubular member on the non-connector side of the tubular body.

According to the above characteristic configuration, the tip of the movable member forms a plurality of divided tip portions separated by a plurality of cutout portions along the axial direction thereof. When the plug is forcibly pushed into the plug, each of the divided tip portions can independently push the hose back from the plug base end side to the tip end side. As a result, even if some of the divided distal end portions cannot push back the hose, other divided distal end portions can push the hose back from the plug distal end side to the proximal end side.
Specifically, for example, in a portion where the lock groove portion is formed in the axial direction, when the hose enters the lock groove portion, a part of the divided tip portion provided in the movable member spreads outward in the axial radial direction, and the divided tip portion A hose may be pinched | interposed between a part of site | part and a lock groove part. According to the above-described characteristic configuration, even in such a case, the other divided distal end portion protects the original position in the axial diameter direction, and exhibits the function of pushing the hose back from the plug proximal end side to the distal end side. In addition, it is possible to prevent the hose from being incorrectly connected to the plug.
On the other hand, when the joint member is connected to the plug, the plurality of divided distal end portions are ends on the non-connector side of the tubular body of the joint member that is pushed along the plug from the distal end side to the proximal end side in the axial direction. It abuts on the part and is appropriately guided to the plug base end side.
Further, as another effect, since the plurality of divided tip portions at the tip of the movable member are divided and easily spread outward in the axial diameter direction, the hose is provided between the movable member and the lock groove portion. Even when biting, the hose can be pulled out relatively easily.

  A further characteristic configuration of the erroneous connection preventing device according to the present invention is that the biasing member has an elastic force for detaching the hose from the plug when the hose is directly connected to the plug. .

According to the above characteristic configuration, even when the hose is forcibly pushed into the plug, the movable member is urged toward the distal end rather than the force that the hose shrinks in the axial diameter direction and is fixed to the plug. By setting the elastic force of the urging member strongly, the hose is detached from the plug. Thereby, the misconnection with respect to the plug of a hose can be prevented actively.
As described above, in the normal connection state where the joint member is connected to the plug, the locking ball provided on the joint member is fitted into the lock groove portion of the plug, and the movement in the axial direction of both is completely locked. Is done. For this reason, even if it is a case where the elastic force of an urging member is strengthened, the normal connection state of a joint member and a plug can be maintained satisfactorily.

  A further characteristic configuration of the erroneous connection preventing device according to the present invention is that an engagement mechanism is provided between the cylindrical housing and the movable member to prevent the movable member from being separated from the cylindrical casing. It is in.

  According to the above characteristic configuration, the movable member is engaged with the engagement mechanism by the engagement mechanism in the movable member protruding posture in which the movable member protrudes from the cylindrical casing, so that the movable member is on the distal end side of the plug. Can be prevented from being detached. Furthermore, in the movable member protruding posture, the movable member can be biased toward the distal end side by the biasing member. Accordingly, when the hose enters the plug, the movable member can press the hose from the plug in a direction that is relatively strong from the beginning when the hose and the movable member come into contact with each other. By doing in this way, the misconnection with respect to the plug of a hose can be prevented further.

  The characteristic configuration of the hose misconnection prevention structure for achieving the above object of the present invention is that the above-described misconnection prevention device is mounted on the outer diameter portion of the first annular portion and the second annular portion of the plug. It is in.

  According to the above characteristic configuration, the erroneous connection prevention structure can satisfactorily exhibit the effects provided by the erroneous connection prevention device described above.

It is sectional drawing of the joint member of a closed state. It is sectional drawing of a plug. It is sectional drawing of the coupling member connected to a plug and an open state. It is the perspective view and sectional drawing which show 1st Embodiment of the misconnection prevention apparatus of this invention. It is sectional drawing with time when connecting a joint member with respect to the plug equipped with the erroneous connection preventing device of the present invention. It is sectional drawing at the time of trying to connect a hose with respect to the plug with which the incorrect connection prevention apparatus of this invention was mounted | worn. It is the perspective view and sectional drawing which show another embodiment of the incorrect connection prevention apparatus of this invention. It is sectional drawing at the time of trying to connect a hose with respect to the plug with which the incorrect connection prevention apparatus of another embodiment of this invention was mounted | worn. It is sectional drawing at the time of trying to connect a hose with respect to a plug in the state which provided the clearance gap between the movable member and plug of the misconnection prevention apparatus of another embodiment of this invention.

  Embodiments of the erroneous connection prevention device 100 and the erroneous connection prevention structure of the present invention will be described with reference to the drawings. Of the configuration of the joint member 20, the configuration of the plug 40, the connection operation of connecting the hose 10 to the plug 40 via the joint member 20, and the separation operation of the joint member 20 from the plug 40, the disclosure is disclosed in Patent Document 1 described above. The same configuration, connection operation, and separation operation as those described above will be denoted by the same reference numerals, and description thereof may be omitted.

  As shown in FIG. 4A, the erroneous connection preventing apparatus 100 of the present invention includes a cylindrical housing 50, a movable member 51 that is movable in the axial direction with respect to the cylindrical housing 50, and the A third coil spring 52 (an example of an urging member) that urges the movable member 51 toward the distal end side from the proximal end side of the cylindrical casing 50 is configured. The cylindrical housing 50, the movable member 51, and the third coil spring 52 are configured to be detachable from the plug 40. Hereinafter, the cylindrical housing 50, the movable member 51, and the third coil spring 52 will be described based on FIGS. 4B and 4C in a state where each is mounted on the plug 40. FIG.

  The cylindrical housing 50 has an opening on the distal end side (right side in FIG. 4) in the axial direction, and a proximal end side (left side in FIG. 4) is fixed along the outer periphery of the small diameter portion 44 of the plug 40. In the axial direction, the plug 40 is positioned so as to surround a part of the proximal end side of the second annular part 43 of the plug 40 and a part of the distal end side of the small diameter part 44. An annular convex portion 53 that protrudes inward in the axial radial direction is provided at the tip of the cylindrical housing 50 and engages with a claw portion 54 of a movable member 51 described later. The cylindrical housing 50 has a function of surrounding and protecting a third coil spring 52, which will be described in detail later, and also functions as a holding portion held by an operator when the joint member 20 and the plug 40 are attached and detached.

The third coil spring 52 has a base end abutted against an annular flange 58 provided on the base end side of the cylindrical housing 50, and a tip end provided on the inner periphery of the movable member 51 described in detail later. The second step portion 57 is in contact with the stepped portion 57, and is provided along the outer peripheral surface of the second annular portion 43 of the plug 40. Accordingly, the third coil spring 52 functions to make the movable member 51 movable in the axial direction and to urge the movable member 51 toward the distal end side in the axial direction.
The elastic force of the third coil spring 52 is set to a value that allows the hose 10 to be detached immediately when the hose 10 is directly connected to the connecting portion of the plug 40.
Further, the third coil spring 52 is provided so that the entirety of the third coil spring 52 is located inside the cylindrical housing 50 and the movable member 51 described in detail later in either the compressed state or the expanded state. Such an arrangement configuration of the third coil spring 52, the cylindrical casing 50, and the movable member 51 exhibits a function of preventing an operator from pinching a hand or the like due to the expansion and contraction of the third coil spring 52.

The movable member 51 has an inner diameter larger than the outer diameters of the first annular portion 41 and the second annular portion 43 of the plug 40, and is along the outer peripheral surfaces of the first annular portion 41 and the second annular portion 43 of the plug 40. It is provided and is configured to be movable inside the cylindrical housing 50 in a form along the first annular portion 41 and the second annular portion 43 in the axial direction.
The distal end portion 55 of the movable member 51 has a tapered shape whose outer diameter is reduced toward the distal end side. As shown in FIGS. 4B and 4C, the distal end portion 55 has a right-angled triangular shape with the inclined surface directed toward the distal end side in a cross-sectional view. When the hose 10 is directly pushed into the tip of the plug 40, the tip 55 has a function of spreading the force pushed in the axial direction outward in the axial direction in a form that widens the tip of the hose 10 along the tapered shape. Demonstrate.
On the proximal end side of the movable member 51, there is a claw portion 54 that engages with the annular convex portion 53 provided on the distal end side of the cylindrical housing 50 described above. The claw portion 54 is separated from the cylindrical housing 50 in such a manner that the movable member 51 maintains an engaged state with the annular convex portion 53 in a movable member protruding posture in which the movable member 51 protrudes toward the distal end side of the plug 40. It functions as an engagement mechanism that prevents this.
A plurality of gaps 56 (see FIGS. 4 and 5) for separating the claw portions 54 in the circumferential direction are further provided on the proximal end side of the movable member 51. The gap 56 contracts in the circumferential direction when the movable member 51 is inserted from the distal end side to the proximal end side of the cylindrical housing 50, and expands in the circumferential direction after being inserted. It functions so as to be favorably inserted into the cylindrical housing 50.
As described above, the movable member 51 has the stepped portion 57 along the inner periphery, and the stepped portion 57 is urged toward the distal end side in a form pressed by the third coil spring 52.
The distal end portion 55 of the movable member 51 is positioned substantially at the center of the first annular portion 41 of the plug 40 in the axial direction in the movable member protruding posture where the claw portion 54 is engaged with the annular convex portion 53, and is in a retracted posture. Then, it is located in the front end side from the center of the 2nd annular part 43 of the plug 40 in an axial direction.

Next, the relationship among the diameters of the movable member 51, the first annular portion 41 and the second annular portion 43 of the plug 40, the operating member 33, the sleeve member 34, and the tip member 24 will be described with reference to FIG. .
As described above, the inner diameter of the movable member 51 is larger than or along the outer diameter of the first annular portion 41 and the second annular portion 43 of the plug 40. The outer diameter of the movable member 51 is smaller than the inner diameter of the sleeve member 34 and larger than the inner diameter of the tip member 24 provided inside the sleeve member 34. The outer diameter of the first annular portion 41 of the plug 40 is smaller than the inner diameter of the tip member 24 and larger than the inner diameter of the operating member 33.
By setting the diameter of each member in this manner, the movable member 51 is not brought into contact with the sleeve member 34 and the actuating member 33 in the normal connection state of the joint member 20 and the plug 40, which will be described later. The movable member 51 can be pushed into the proximal end side of the plug 40 by the distal end member 24. Further, the first annular portion 41 of the plug 40 can be brought into contact with the operating member 33, and the operating member 33 can be pushed into the proximal end side of the joint member 20 by the first annular portion 41 of the plug 40.

  Next, the connecting operation of the joint member 20 to the 5 plug 40 and the separating operation of the joint member 20 from the 6 plug 40 with the erroneous connection preventing device 100 of the present invention attached to the plug 40 will be described with reference to FIGS. 2 and FIG.

5 Connection Operation of Joint Member 20 to Plug 40 In the state before entering shown in FIGS. 5A and 5B, the joint member 20 is in a closed state as shown in FIG. In the erroneous connection preventing apparatus 100 of the present application, the third coil spring 52 urges the movable member 51 to the limit position on the distal end side, and the claw portion 54 of the movable member 51 and the annular convex portion 53 of the cylindrical housing 50 are formed. Engage. At this time, the distal end portion 55 of the movable member 51 is positioned at the approximate center in the axial direction of the first annular portion 41 of the plug 40.

  5C to 5E, the distal end of the first annular portion 41 of the plug 40 abuts against the distal end of the operating member 33, and pushes the operating member 33 toward the connector 11 side. The member 24 comes into contact with the distal end portion 55 of the movable member 51 and pushes the movable member 51 into the proximal end side of the plug 40. At this time, since the outer diameter of the movable member 51 is configured to be smaller than the inner diameter of the sleeve member 34, the sleeve member 34 does not contact the movable member 51, and a force is applied from the movable member 51 in the axial direction. There is nothing.

  5 (f), the joint member 20 is switched from the closed state shown in FIG. 1 to the open state shown in FIG. 3, and the sleeve member 34 protrudes toward the distal end side. That is, when the plug 40 enters the state shown in FIG. 5 (f), the operating member 33 is retracted toward the connector 11, and at the outer peripheral surface of the tip of the operating member 33, the first restricting surface 25 is positioned on the outer diameter side. The positioned locking ball 35 is fitted into the lock groove portion 42 of the plug 40. Thereby, the position holding of the sleeve member 34 to the proximal end side by the locking ball 35 is released, and the sleeve member 34 protrudes to the distal end side. Here, the movable member 51 moves to the limit position on the proximal end side of the plug 40. At this time, the tip member 24 that comes into contact with the tip portion 55 of the movable member 51 is biased toward the connector 11, but the locking ball 35 of the joint member 20 is fitted into the lock groove portion 42 of the plug 40. Therefore, the connection state of the joint member 20 to the plug 40 is maintained.

6 Separation operation of joint member from plug 40 In the state at the start of separation shown in FIG. 5 (f), the operator holds the sleeve member 34 of the joint member 20, and attaches the sleeve member 34 to the connector 11 of the joint member 20. Move to the proximal side, which is the side. In the state before the movement, the joint member 20 is in an open state shown in FIG.
In the state in the middle of separation shown in FIGS. 5E to 5C, the operator moves the sleeve member 34 to the proximal side against the urging force of the second coil spring 32, so that the sleeve The first restricting surface 25 of the member 34 comes to a position facing the locking ball 35 in the axial direction, and the locking ball 35 is detached from the lock groove portion 42. As a result, the sleeve member 34 is held at the proximal end side by the locking ball 35 and the joint member 20 is separated from the plug 40. At this time, the movable member 51 gradually moves toward the distal end side of the plug 40 while pressing the distal end portion 55 of the distal end member 24.
5B to 5A, the actuating member 33 is urged from the proximal end side to the distal end side by the first coil spring 31 to seal the fluid flow path 22. Therefore, the joint member 20 is switched from the open state to the closed state.

Next, an erroneous connection prevention operation for preventing the hose 10 from being erroneously connected in a state where the erroneous connection prevention device 100 of the present invention is attached to the plug 40 will be described with reference to FIG.
As shown in FIGS. 6A and 6B, when the hose 10 is to be connected to the plug 40, the outer diameter of the movable member 51 surrounding the plug 40 is that of the hose 10 that is normally used. Since it is designed to be larger than the inner diameter, when the hose 10 is pushed toward the proximal end side of the plug 40, the distal end portion 55 of the movable member 51 functions to push the hose 10 back. Here, the elastic force of the third coil spring 52 is set to a force that immediately releases the connection of the hose 10 to the plug 40 when the hose 10 is connected to the plug 40.
Further, since the distal end portion 55 of the movable member 51 has a so-called taper shape with a diameter decreasing toward the distal end side, the force that the hose 10 is pushed in the axial direction that is the proximal end side of the plug 40 is released in the axial radial direction. To work.

[Another embodiment]
Hereinafter, another embodiment of the erroneous connection prevention device 100 of the present invention will be described.
(1)
In another embodiment of the erroneous connection prevention device 100 and the erroneous connection prevention structure having the same according to the present invention, as shown in FIGS. 7 (a) and 7 (d), as shown in FIGS. A movable member 51 that is movable in the axial direction with respect to the cylindrical housing 50, and a first member that biases the movable member 51 from the proximal end side of the cylindrical housing 50 toward the distal end side. 3 coil springs 52 (an example of an urging member). In the present embodiment, only the specific configuration of the distal end portion of the movable member 51 is different from the above-described embodiment. Therefore, this point will be specifically described below, and description of other configurations will be omitted.

As shown in FIGS. 7A and 7D, the distal end portion 55 of the movable member 51 is separated from a plurality of divided distal end portions 61 separated by a plurality of cutout portions 60 provided from the distal end side along the axial direction. It is configured. The plurality of notches 60 are provided at intervals in the circumferential direction, and the number thereof is preferably at least 2 and not more than 6, as shown in FIG. The number of divided tip portions 61 provided between the notches 60 in the circumferential direction is the same as that of the notches 61. In this manner, by setting the number of the divided tip end portions 61 to at least two, when the hose 10 is pushed into the plug 40, the one divided tip end portion 61 cannot be pushed back. Even if it becomes, the other division | segmentation front-end | tip part 61 can push the hose 10 back.
On the other hand, by setting the number of the divided tip portions 61 to 6 or less, the length of the divided tip portions 61 in the circumferential direction can be made a certain value or more, and the strength of the divided tip portions 61 can withstand the pushing force of the hose 10. You can maintain what you get.
The length in the axial direction of the notch 60 is preferably about 0.3 to 0.5 times the length of the movable member 51. Thereby, the division | segmentation tip part 61 can be isolate | separated appropriately from the adjacent division | segmentation tip part 61, and each division | segmentation tip part 61 exhibits the force which pushes back the hose 10 independently.
It is preferable that the arrangement of the plurality of notches 60 in the circumferential direction is provided between a plurality of gaps 56 provided on the proximal end side of the movable member 51 in the circumferential direction. Furthermore, it is even more preferable that they are provided at equal intervals from the adjacent gaps 56 in the circumferential direction.
Thereby, the intensity | strength of the movable member 51 whole can be maintained to the thing which can bear the pushing force of the hose 10.

  As shown in FIG. 7B, the erroneous connection preventing device 100 of this embodiment attached to the plug 40 is movable when the joint member 20 is pushed into the plug 40 from the distal end side to the proximal end side. Each of the plurality of divided distal end portions 61 provided at the distal end portion 55 of the member 51 abuts against the end portion on the non-connector side of the distal end member 24 of the joint member 20 and is appropriately guided to the plug proximal end side. As shown in FIG. 7C, when the locking ball 35 of the joint member 20 is fitted into the locking groove portion 42 of the plug 40 and is brought into a connected state, the movable member 51 is connected to the non-connector side of the tip member 24. The position is fixed to the base end side of the plug by the end of the plug.

  On the other hand, when the hose 10 is pushed from the plug distal end side to the proximal end side with respect to the plug 40, as shown in FIG. 8A, each divided distal end portion 61 of the movable member 51 independently connects the hose 10. Can push back. As a result, for example, as shown in FIG. 8B, the hose 10 fitted into the lock groove 42 is pivoted at a part of the plurality of divided tip portions 61 a where the lock groove 42 is formed in the axial direction. When the biting hose 10 cannot be pushed back from the outside in the radial direction, the other divided distal end portion 61b exhibits a function of pushing the hose 10 back from the plug proximal end side to the distal end side.

Further, the movable member 51 of the present embodiment can be configured by providing a gap 62 between the movable member 51 and the plug 40 as shown in FIG. Thereby, when the hose 10 is pushed in, the pushing force of the hose 10 can be dispersed from the axial direction to another direction.
(2)
The distal end portion 55 of the movable member 51 of the present invention is configured so as to be positioned approximately at the center of the first annular portion 41 of the plug 40 in the axial direction in a disconnected state where the joint member 20 is not connected to the plug 40. The plug 40 may be configured to protrude toward the tip end side. By configuring in this way, the plug 40 is completely surrounded by the movable member 51, so that the hose 10 becomes more difficult to connect to the plug 40.

(3)
The outer diameter of the distal end portion 55 of the movable member 51 of the present invention is a shape that is reduced in diameter toward the distal end side, but it is not necessary to limit to this shape separately, for example, a shape having a contact surface perpendicular to the axial direction. It is good.

(4)
Since the third coil spring 52 is immediately detached when the hose 10 is directly connected to the plug 40, the third coil spring 52 contracts more than the natural state in the movable member protruding posture in which the movable member 51 protrudes toward the distal end side of the plug 40. Can be prepared. By doing so, even when the third coil spring 52 has a relatively weak elastic force, when the hose 10 is pushed into the connecting portion of the plug 40, a force is applied so that the hose 10 can be immediately detached. be able to.

  The erroneous connection prevention device of the present invention and the connection device provided with the erroneous connection prevention device have the hose directly attached to the plug by attaching the erroneous connection prevention device referred to herein to a plug provided in a gas appliance or the like. The present invention can be effectively used as a device that actively prevents the occurrence of a connection error.

20: joint member 21: cylindrical main body 25: first regulating surface 26: second regulating surface 33: actuating member 34: sleeve member 35: locking ball 40: plug 41: first annular portion 42: lock groove 43: first 2 annular part 46: internal fluid flow path 50: cylindrical housing 51: movable member 52: third coil spring (an example of an urging member)
55: Tip portion 60: Notch portion 61: Split tip portion 100: Incorrect connection prevention device

Claims (8)

A connector to which a hose is connected, a cylindrical main body connected to the connector, an operating member movable in the axial direction within the cylindrical main body, a sleeve member movable in the axial direction at an outer peripheral portion of the cylindrical main body, and A locking ball positioned on the non-connector side of the cylindrical main body, the axial position of the sleeve member being regulated by the inner diameter surface of the sleeve member; and the locking member at a non-connector side portion in the axial direction of the sleeve member A first restricting surface for restricting the ball to the outer diameter side position, and a second restricting surface provided on the connector side from the first restricting surface and restricting the locking ball to the inner diameter side position. In an open posture in which the movement of the ball is restricted by the second restricting surface and the actuating member moves to the connector side, fluid is allowed to flow out from the joint tip on the non-connector side. And a closed state in which the outflow of fluid from the joint tip is stopped in a closed posture in which the locking ball is restricted from moving in the radial direction by the first restriction surface and the operating member is moved to the non-connector side. A joint member that can be switched between,
A plug main body and a connecting portion to which the joint member is connected; an internal fluid passage extending from the axial tip to the base end; and a first annular shape from the tip of the connecting portion toward the base end A misconnection prevention device for use in a hose connection structure for connecting to a plug having a portion, a lock groove portion for receiving the lock ball and a second annular portion,
A cylindrical housing, a movable member that is movable in the axial direction with respect to the cylindrical housing, and a biasing member that biases the movable member from the proximal end side to the distal end side of the cylindrical housing;
The cylindrical housing, the movable member, and the biasing member have inner diameters larger than the outer shapes of the first annular portion and the second annular portion, and the cylindrical housing, the movable member, and the biasing member are the first annular portion and the first annular portion. It is configured to be attachable to the outer diameter part of the two annular parts,
The movable member is configured to be movable in the axial direction along the outer peripheral surface of the second annular portion, and the outer diameter of the movable member is configured to be smaller than the inner diameter of the sleeve member,
In a connection operation for connecting the joint member to the plug, an erroneous connection prevention device that allows the movable member to be retracted into the cylindrical housing and the joint member to be changed from the closed state to the open state.   When the movable member is urged by the urging member and the movable member protrudes from the cylindrical housing in the mounted state where the movable member is mounted on the plug, the distal end of the movable member is the plug. The erroneous connection preventing apparatus according to claim 1, wherein the erroneous connection preventing apparatus is located closer to the plug proximal end than the distal end.   When the movable member is urged by the urging member and the movable member protrudes from the cylindrical housing in the mounted state where the movable member is mounted on the plug, the distal end of the movable member is the plug. The erroneous connection preventing apparatus according to claim 1, wherein the erroneous connection preventing apparatus projects forward from the tip.   4. The erroneous connection preventing device according to claim 1, wherein the distal end portion of the movable member has a tapered shape whose outer diameter is reduced toward the distal end side. 5.   The distal end portion of the movable member includes a plurality of divided distal end portions separated by a plurality of cutout portions provided from the distal end toward the proximal end side along the axial direction, and each of the plurality of divided distal end portions. 5 is an erroneous connection preventing device according to any one of claims 1 to 4, which contacts an end portion of the tubular body of the joint member on a non-connector side.   The improper connection prevention device according to any one of claims 1 to 5, wherein the urging member has an elastic force for detaching the hose from the plug when the hose is directly connected to the plug.   The erroneous connection prevention according to any one of claims 1 to 6, further comprising an engagement mechanism that prevents the movable member from being separated from the cylindrical housing between the cylindrical housing and the movable member. apparatus.   A misconnection prevention structure for a hose, wherein the misconnection prevention device according to any one of claims 1 to 7 is attached to an outer diameter portion of the first annular portion and the second annular portion of the plug.

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