JP2010255669A - Incorrect connection preventing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To positively prevent the occurrence of an incorrectly connected state in which a hose is connected directly to a plug. <P>SOLUTION: When a tip of the hose 10 abuts on a tip face of a plug 40, an inside diameter of a movable member 51 is disposed along an outer diameter of the hose 10. The size of the movable member 51 in an axial diameter direction allows the abutment between an end on a plug base end side of a joint member and an end on a plug tip side of the movable member 51 when connecting the joint member to the plug 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a misconnection prevention device that prevents a hose (for example, a gas hose) that is originally connected to a plug through a joint member from being directly connected to a plug provided in a gas device or the like.
The erroneous connection prevention device proposed in the present application does not exist in the past, but has been developed by the present inventors based on a unique problem 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 the joint member 20, the configuration of the plug 40, the operation of connecting the joint member 20 to the plug 40, and the operation of separating the joint member 20 from the plug 40 will be described in this order using these drawings.

[Composition of joint member 20]
As shown in FIG. 1, the joint member 20 is roughly operated by a connector 11 to which the hose 10 is connected, a cylindrical main body 21 connected to the connector 11, and an axially movable operation inside the cylindrical main body 21. The position in the axial radial direction is regulated by the member 33, the sleeve member 34 that is movable in the axial direction at the outer peripheral portion of the cylindrical main body 21, and the inner diameter surface of the sleeve member 34 that is positioned on the non-connector side of the cylindrical main body 21. And a locking ball 35. 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. A second coil spring 32 is provided between the sleeve member 34 and the sleeve member 34. The second coil spring 32 is a biasing member that biases the sleeve member 34 toward the distal end side (left side in FIG. 1) with respect to the cover member 23.

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.
Further, the joint member 20 is provided with a tip member 24 for positioning the locking ball 35 from the tip side (left side in FIG. 1).

  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 shown in 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 locking ball 35 is regulated in the radial direction by the first regulating surface 25, and the operating member 33 is not connected to the connector side ( In the closed posture moved to the left side in FIG. 1, 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 locking ball 35 is restricted from moving in the radial direction by the second restricting surface 26, and the actuating member 33 is connected to the connector side (FIG. The fluid is allowed to flow out from the joint tip in the open posture moved to the right). Therefore, the joint member 20 is configured to be switchable between a closed state and an open state.

[Configuration of Plug 40]
As shown in FIG. 2, the plug 40 is configured to include a plug main body 45 and a connection portion to which the joint member 20 is connected, and includes an internal fluid channel 46 extending from the distal end to the proximal end in the axial direction. The first annular portion 41, the locking groove portion 42 for receiving the locking ball 35, and the second annular portion 43 are sequentially provided from the distal end side to the proximal end side.
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 large-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 body 45 having a larger diameter than that of the large diameter portion 44 is provided on the base end side.

[Connection operation of joint member 20 to 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 enters the plug 40 into the joint member 20. In this state, the joint member 20 is in the closed state shown in FIG. In the entering operation, the end surface 47 on the distal end side of the plug 40 abuts on the distal end of the operating member 33 and pushes the operating member 33 toward the connector side. 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 urged toward the distal end side is released from the proximal position by the locking ball 35, and the sleeve member 34 projects toward the distal end side (left side in FIG. 3). This state is the open state shown in FIG.

[Separation Operation of Joint Part Material 20 from Plug 40]
When separating the joint member 20 from the plug 40, the operator holds the sleeve member 34 of the joint member 20 and moves the sleeve member 34 to the proximal end side (right side in FIG. 3) of the joint member 20. 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 lock ball 35 is detached from the lock groove 42. As a result, the sleeve member 34 is held at the proximal end side (right side in FIG. 3) 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 via a joint member and an erroneous connection state in which the hose is directly connected to a plug when a hose is connected to a plug provided in a gas appliance. 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 connection portion to which a connector to which a hose is connected, a sleeve member movable in an axial direction, and a joint member having a locking ball is connected. The plug is provided with an internal fluid flow path extending from the distal end to the proximal end in the axial direction, the first annular portion from the proximal end to the distal end side of the connection portion, a lock groove portion for receiving the locking ball, and a first 2 is a misconnection prevention device used for a hose connection structure provided with an annular portion and connecting the joint member to the plug,
The cylindrical housing that can be attached to the plug protrudes more toward the plug tip than the tip of the plug in the axial direction at the outer peripheral portion of the first annular portion, the lock groove portion, and the second annular portion of the plug. A movable member that is movable in the axial direction between a projecting position that is retracted and a retracted position that is retracted to the plug base end side relative to the projecting position, and a movable member that urges the movable member in the axial direction toward the projecting position Biasing means, and the size of the movable member in the axial radial direction is such that when the joint member is connected to the plug, the end of the joint member on the plug base end side and the tip of the plug of the movable member The movable member has a size that allows contact with the end of the hose, and the movable member has an outer periphery of the hose at a portion that protrudes more toward the plug tip than the tip of the plug when the hose is connected to the plug. The hose In that it is configured to freely suppressed.

  According to this characteristic configuration, in the disconnected state in which the joint member is not connected to the plug, the movable member is positioned at a protruding position that protrudes more toward the plug tip than the tip of the plug by the biasing force of the biasing means for the movable member. ing. Here, the protruding position includes any position as long as the tip of the movable member is located closer to the plug tip than the tip of the plug.

When connecting the joint member to the plug, the operator moves the joint member to the plug proximal end side with respect to the plug. At this time, the size of the movable member in the axial diameter direction is configured such that the end of the joint member on the plug proximal end side and the end of the movable member on the plug distal end side are in contact with each other, and Since the position of the movable member is the protruding position, the movable member is pressed to the plug base end side by the end of the joint member on the plug base end side. As a result, the movable member is switched from the protruding position on the plug distal end side to the retracted position on the plug proximal end side.
Further, when the joint member is moved to the plug base end side, the locking ball of the joint member is fitted into the lock groove portion of the plug, and the sleeve member of the joint member protrudes to the plug base end side, so that the plug, the joint member, Is connected. At this time, the movable member urged toward the plug tip by the movable member urging means urges the joint member toward the plug tip, but the lock ball and the lock groove are engaged. The connection state is maintained.

On the other hand, when trying to connect the hose directly to the plug, the outer diameter of the plug is usually larger than the inner diameter of the hose, so the user presses the inner diameter surface of the hose against the outer peripheral surface of the plug. By pushing the hose in the axial direction toward the plug base end, the plug is inserted into the hose while expanding the diameter of the hose.
At this time, according to the erroneous connection preventing apparatus of the present invention, the movable member abuts the outer peripheral portion of the hose at the portion protruding toward the plug tip side from the tip of the plug, so that the outer peripheral portion of the hose is moved by the movable member. It becomes covered and the diameter expansion of a hose is suppressed. As a result, even when the user tries to connect the hose directly to the plug, the movable member can suppress the hose diameter expansion and appropriately prevent the plug from entering the inside of the hose. Can be prevented.

  From the above, it is possible to prevent the direct connection of the hose to the plug, and it is possible to realize an erroneous connection prevention device that can satisfactorily perform the connection of the joint member to the plug.

  A further characteristic configuration of the erroneous connection preventing device of the present invention is that the inner diameter of the movable member on the plug distal end side is gradually narrowed in the axial direction from the plug distal end side to the proximal end side. .

  According to the above characteristic configuration, the inner diameter of the movable member is gradually narrowed from the plug distal end side to the proximal end side, so the hose enters the plug proximal end side along the inner diameter surface of the movable member. Accordingly, the diameter of the hose is gradually reduced to realize a state in which the diameter of the hose is difficult to expand, and erroneous connection of the hose to the plug can be further prevented.

  A further characteristic configuration of the erroneous connection preventing device of the present invention is that a plurality of distal end abutting portions that are dispersedly arranged in the circumferential direction at the distal end of the movable member and abut against the plug proximal end of the joint member. Is in the point provided.

  According to the above characteristic configuration, in the portion where the tip contact portion is provided, the hose can be prevented from expanding in diameter, and the hose can be prevented from moving toward the proximal end of the plug. Since the expansion of the hose is allowed, the force applied to the outside in the axial radial direction of the movable member due to the expansion of the hose can be appropriately dispersed. Thereby, when a hose is pushed into the plug proximal end side forcibly, the possibility that the movable member is damaged or deformed can be reduced.

  According to a further characteristic configuration of the erroneous connection preventing device of the present invention, when the joint member is connected to the plug, the end of the joint member on the plug base end side is in the axial direction. A portion on the inner diameter side of the sleeve member can contact the movable member, and the sleeve member is in the axial direction between the outer peripheral portion of the movable member and the inner peripheral portion of the cylindrical housing in the axial radial direction. The point is that it is configured to be freely movable.

  According to the above-described characteristic configuration, when the joint member is connected to the plug, the portion on the inner diameter side of the sleeve member in the axial radial direction of the end portion on the plug base end side of the joint member comes into contact with the movable member so that the movable member is It is possible to accurately press the plug proximal end. Then, when the locking ball of the joint member fits into the lock groove of the plug and the sleeve member protrudes toward the plug base end side, the outer periphery of the movable member is not affected by the interference of the movable member biased toward the plug distal end side. The sleeve member can move to the plug base end side between the part and the inner peripheral part of the cylindrical housing, and the connection of the joint member to the plug can be realized with certainty.

  According to a further characteristic configuration of the erroneous connection preventing device of the present invention, the cylindrical housing has a shape that protrudes more toward the plug tip than the movable member positioned at the protruding position in the axial direction at the outer peripheral portion of the movable member. And it exists in the point formed in the shape which covers over the perimeter of the circumferential direction of the said movable member.

  According to the above-described characteristic configuration, when connecting the joint member to the plug, the operator moves the joint member to the plug proximal end side. At this time, the plug distal end side rather than the movable member located at the protruding position. The joint member can be moved to the plug base end side while guiding the outer peripheral portion of the sleeve member at the inner peripheral portion of the cylindrical casing protruding in the direction. Therefore, for example, the shaft center of the joint member is guided to the plug base end side in a state of substantially matching the shaft center of the plug that substantially matches the shaft center of the cylindrical housing, and the joint is connected to the plug. It is possible to simplify the operation of the operator when connecting the members.

  According to a further characteristic configuration of the erroneous connection preventing device of the present invention, the cylindrical housing is connected to the plug with the joint member connected to the plug member in the axial direction from the outside to the inner sleeve member. This is in that an operation opening that can be moved sideways is provided.

  According to the above characteristic configuration, in the connected state in which the joint member is connected to the plug, the operator can connect the inside of the cylindrical housing via the operation opening of the cylindrical housing provided in the cylindrical housing. The sleeve member can be directly moved. As a result, the erroneous connection preventing device can have a simple configuration without providing a connection release member or the like for releasing the connection of the joint member to the plug.

  According to still another aspect of the present invention, there is provided a connection release member for releasing the connection of the joint member to the plug by a movement operation in an axial direction in a connection state in which the joint member is connected to the plug. Provided that the connection release member is configured to be capable of releasing the connection of the joint member to the plug by pressing the end of the sleeve member on the plug proximal end side by a movement operation in the axial direction. is there.

  According to the above characteristic configuration, the connection of the joint member to the plug can be released simply by moving the connection release member in the axial direction, and the operation for releasing the connection of the joint member to the plug is facilitated.

  According to a further characteristic configuration of the erroneous connection preventing device of the present invention, the connection release member is connected to the plug in a state where the joint member is connected to the plug base of the sleeve member at the inner peripheral portion of the cylindrical housing. An internal abutting portion that can abut against an end portion on the end side and an external operation portion that is movable in the axial direction at an outer peripheral portion of the cylindrical housing, and the internal operation portion is moved by the movement of the external operation portion in the axial direction. The contact portion is configured to contact the end portion of the sleeve member on the plug base end side so as to be freely pressed.

  According to the above characteristic configuration, the connection of the joint member to the plug can be released simply by moving the external operation part that can be moved and operated in the axial direction at the outer peripheral portion of the cylindrical housing in the axial direction. The operation when releasing the connection of the members becomes easy. In addition, in the connected state in which the joint member is connected to the plug, the sleeve member is positioned inside the cylindrical housing. However, by operating the external operation unit, the sleeve member is moved to the retracted posture without directly operating the sleeve member. It can be moved, and the operation for releasing the connection of the joint member to the plug is easier to perform.

  A further characteristic configuration of the erroneous connection preventing device of the present invention is that the internal contact portion is provided so as to be movable in the axial direction at an outer peripheral portion of the movable member.

  According to the above characteristic configuration, the internal contact portion moves the outer peripheral portion of the movable member in the axial direction, so that the internal contact portion can be moved without interfering with the movable member. In addition, the external operation portion can be moved in the axial direction while the internal contact portion is in direct contact with the end of the sleeve member on the plug proximal end side, and the sleeve member can be accurately moved toward the plug distal end side. Can be done. Therefore, the connection release operation can be performed easily and accurately. Furthermore, since there is an internal contact portion at the outer peripheral portion of the movable member in the axial direction, for example, when the hose is directly connected to the plug, the outer peripheral portion of the movable member can contact the internal contact portion. Thus, the movable member itself can be prevented from expanding in diameter. Therefore, it is possible to accurately prevent an erroneous connection of the hose to the plug.

It is sectional drawing of a coupling member. It is sectional drawing of a plug. It is sectional drawing which shows the connection state of a coupling member and a plug. It is a disassembled perspective view of the erroneous connection preventing device of the first embodiment. It is a side view which shows the connection cancellation | release state and connection transition state of a plug provided with the erroneous connection prevention apparatus of 1st Embodiment, and a coupling member. It is sectional drawing which shows the connection transition state and connection state of a plug provided with the erroneous connection prevention apparatus of 1st Embodiment, and a coupling member. It is sectional drawing at the time of trying to connect a hose with respect to the plug provided with the incorrect connection prevention apparatus of 1st Embodiment. It is a disassembled perspective view of the misconnection prevention apparatus of 2nd Embodiment. It is sectional drawing which shows the connection cancellation | release state and connection transition state of a plug provided with the misconnection prevention apparatus of 2nd Embodiment, and a coupling member. It is sectional drawing at the time of trying to connect a hose with respect to the plug provided with the incorrect connection prevention apparatus of 2nd Embodiment. It is a side view which shows the connection state of a plug provided with the erroneous connection prevention device of a 2nd embodiment, and a joint member, and a connection release transition state (showing connection release operation via an operation opening).

[First Embodiment]
DESCRIPTION OF EMBODIMENTS Embodiments of an erroneous connection prevention device 100 and a connection device including the same according to 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, FIGS. The same reference numerals are given to the same configuration, connection operation, and separation operation as those disclosed in the above, and the description may be omitted.

As shown in FIG. 4, the erroneous connection preventing apparatus 100 of the present invention includes a cylindrical housing 50 that can be attached to a plug 40, and a movable member that can move in the axial direction relative to the cylindrical housing 50. 51, a third coil spring 52 (an example of a biasing means for the movable member) that biases the movable member 51 from the plug proximal end side to the plug distal end side, and an axial movement at the inner peripheral portion of the cylindrical housing 50 A free internal contact portion 60 (an example of a connection release member), an external operation portion 61 (an example of a connection release member) that is movable in the axial direction at the outer peripheral portion of the cylindrical housing 50, and the internal contact member 60. And a fourth coil spring 65 that urges the plug from the plug proximal end side to the plug distal end side. The cylindrical casing 50, the movable member 51, the third coil spring 52, the internal contact part 60, the external operation part 61, and the fourth coil spring 65 are configured to be detachable from the plug 40.
Here, the movable member 51 is urged toward the plug tip side by the third coil spring 52 in the axial direction, and a protruding position (position shown in FIG. 5A) that is closer to the plug tip side than the tip of the plug 40. The switch is configured to be switchable to a retraction position (position shown in FIG. 6B) on the plug base end side. The protruding position includes any position as long as the distal end portion 55 of the movable member 51 is located closer to the plug distal end side than the distal end of the plug 40.

  Hereinafter, in the state where each is mounted on the plug 40, the configurations of the cylindrical housing 50, the movable member 51, and the third coil spring 52 are shown in FIG. 5 (a) [cross-sectional view in the connected state] and FIG. 6 (b). Description will be made based on [cross-sectional view in a disconnected state] and FIG. 7 (cross-sectional view in a hose connection transition state).

  The cylindrical housing 50 is open at the distal end side (the right side in FIG. 5A) in the axial direction, and the proximal end side (the left side in FIG. 5A) is along the outer periphery of the plug body 45 of the plug 40. In addition to being fixed by the fixing screw 70, the large-diameter portion 44, the second annular portion 43, and the lock groove portion of the plug 40 are sequentially arranged in the axial direction from the plug proximal end side to the distal end side (left side to right side in FIG. 5A). 42 and the first annular portion 41 are installed at positions that surround all of them. Further, the distal end of the cylindrical housing 50 is positioned closer to the plug distal end than the movable member 51 that is urged by the third coil spring 52 and is positioned closer to the plug distal end. Thereby, the cylindrical housing 50 is positioned on the movable member 51 and the plug proximal end side (the right side in FIG. 5A) of the movable member 51 and urges the movable member 51 toward the plug distal end side. The coil spring 52 is surrounded and protected.

  The cylindrical housing 50 has a shape that protrudes toward the plug tip side from the movable member 51 located at the protruding position in the axial direction at the outer peripheral portion of the movable member 51 and on the entire circumference of the movable member 51 in the circumferential direction. A shape that covers the movable member 51 is formed. And the internal diameter of the protrusion part of the cylindrical housing | casing 50 which protrudes rather than the movable member 51 located in a protrusion position is comprised the same as the outer diameter of the sleeve member 34 of the joint member 20, or a little larger. As a result, when the joint member 20 is moved to the plug base end side, the outer peripheral portion of the sleeve member 34 can be brought into contact with and guided by the inner peripheral portion of the cylindrical housing 50. Therefore, the central axis of the plug 40 and the central axis of the joint member 20 are moved by moving the joint member 20 to the plug base end side in a state where the outer peripheral part of the sleeve member 34 is guided by the inner peripheral part of the cylindrical housing 50. The plug 40 can be easily moved into the cylindrical main body 21 of the joint member 20 in a state where the two are combined.

The third coil spring 52 is in a form along the outer peripheral surface of the second annular portion 43 of the plug 40, and its proximal end abuts on the large diameter portion 44 of the plug 40, and its distal end is on the inner periphery of the movable member 51 described later. It is provided in contact with the provided step 57. 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 third coil spring 52 is provided so that the entirety of the third coil spring 52 is located inside the cylindrical housing 50 in both the expanded state and the contracted state. Thereby, the function which prevents an operator from pinching a hand etc. by extending / contracting the 3rd coil spring 52 is exhibited.
As long as the elastic force of the third coil spring 52 is equal to or greater than the elastic force of positioning the movable member 51 on the distal end side in FIG. 5A in the disconnected state where the joint member 20 is not connected, Even those with elastic force can be used.

As shown in FIG. 7, when the hose 10 is connected to the plug 40, the movable member 51 is located on the outer peripheral portion of the hose 10 at a portion that protrudes from the tip of the plug 40 toward the plug tip side (right side in FIG. 7). The diameter of the hose 10 is controlled so as to be suppressed by contact.
Since the outer diameter of the plug 40 is usually larger than the inner diameter of the hose 10, the user presses the inner diameter surface of the hose 10 against the outer peripheral surface of the plug 40 and plugs the hose 10 in the axial direction. By pushing into the end side, the plug is inserted into the hose 10 while expanding the diameter of the hose 10. At this time, the movable member 51 comes into contact with the outer peripheral portion of the hose 10 at a portion protruding toward the plug tip side from the tip of the plug 40, so that the outer peripheral portion of the hose 10 is covered with the movable member 51. The diameter expansion of the hose 10 is suppressed. Thereby, even if a user tries to connect the hose 10 directly to the plug 40, the movable member 51 can suppress the diameter expansion of the hose 10 and appropriately suppress the plug 40 from entering the inside of the hose 10, An erroneous connection to the plug 40 of the hose 10 can be prevented.

  As shown in FIG. 5A, the distal end portion 55 of the movable member 51 on the plug distal end side is configured such that the inner diameter surface is gradually narrower in the axial direction from the plug distal end side to the proximal end side. Thereby, the hose 10 can be prevented from expanding in the axial diameter direction, the hose 10 can be made difficult to enter the plug 40 therein, and the function of preventing the hose 10 from being erroneously connected to the plug 40 can be prevented. Demonstrate.

  Further, as shown in FIG. 5B, the distal end portion 55 on the distal end side of the plug of the movable member 51 is provided with a facing surface facing in the axial direction, and the distal end member 24 is disposed on the distal end portion 55 of the movable member 51. On the other hand, it has a facing surface facing in the axial direction. Thus, when connecting the joint member 20 to the plug 40, the opposing surfaces of the tip member 24 and the movable member 51 come into contact with each other as the plug 40 enters the cylindrical main body 21 of the joint member 20. Thus, the movable member 51 can be pressed by the distal end member 24 toward the plug proximal end in the axial direction.

As shown in FIG. 5A, an annular engagement portion 59 that engages with an annular engaged portion 48 provided on the outer periphery of the second annular portion 43 of the plug 40 is provided on the inner diameter surface of the movable member 51. It has been. The annular engagement portion 59 is a mechanism that prevents the movable member 51 from being separated from the plug 40 in a form of engaging with the annular engaged portion 48 at the protruding position where the movable member 51 protrudes toward the plug tip side. Work as a joint mechanism.
Furthermore, as shown in FIG. 4, a plurality of gaps 54 extending in the axial direction are provided on the plug base end side of the movable member 51. When the movable member 51 is sheathed from the distal end side to the proximal end side of the plug 40, the gap 54 is surrounded by a portion where the annular engaged portion 48 (shown in FIG. 5A) of the plug 40 is provided. When the diameter is increased in the direction and the exterior is completed, the movable member 51 is mounted on the plug 40 in a form that reduces the diameter in the circumferential direction.
Further, as shown in FIG. 5A, the movable member 51 is provided with a proximal side stepped portion 57 along the inner periphery, and the stepped portion 57 is pressed by the third coil spring 52. It is urged from the plug proximal end side toward the distal end side.

As shown in FIG. 6B, the erroneous connection preventing apparatus 100 of the present invention connects the joint member 20 to the plug 40 by a movement operation in the axial direction in a connected state in which the joint member 20 is connected to the plug 40. A connection release member for releasing is provided. The connection release member includes an internal contact portion 60 that can freely contact the end portion of the sleeve member 34 on the non-connector side in the inner peripheral portion of the cylindrical housing 50 in a connected state where the joint member 20 is connected to the plug 40. And an external operation unit 61 that is movable in the axial direction at the outer peripheral portion of the cylindrical housing 50. The internal contact portion 60 extends from an opening 62 provided in the cylindrical housing 50 toward the external operation portion 61 and is provided with an extending portion 63 that is fixed to the external operation portion 61.
Thereby, the internal contact portion 60 can be moved in the axial direction along with the movement of the external operation portion 61 in the axial direction. In particular, in the connected state where the joint member 20 is connected to the plug 40, the external operation can be performed. By moving the portion 61 from the plug proximal end side to the distal end side, the inner contact portion 60 is brought into contact with the distal end of the sleeve member 34 of the joint member 20 and moved toward the distal end side of the plug, whereby the joint member 20 can be shifted from the connection state shown in FIG. 6B to the connection release state shown in FIG.

  As shown in FIG. 6B, the internal contact portion 60 is formed in an annular shape, and the inner diameter surface thereof is provided along the outer diameter surface of the movable member 51. Thereby, the movable member 51 is supported by the internal contact portion 60 from the outside to the inside in the axial diameter direction. In the present invention, as shown in FIG. 7, when the user tries to connect the hose 10 to the plug 40, the distal end portion 55 of the movable member 51 expands outward in the axial radial direction and By holding the tip of the hose 10 to be connected from the outside in the axial diameter direction, the diameter of the hose 10 is prevented from being increased. Since the internal contact portion 60 supports the movable member 51 from the outside to the inside in the axial direction, the diameter of the hose 10 can be more appropriately prevented.

  Next, the connecting operation of the joint member 20 to the plug 40 and the separating operation of the joint member 20 from the 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. Based on

(Fitting member connection operation)
In the disconnected state shown in FIG. 5A, the joint member 20 is in the closed state shown in FIG. In this state, the movable member 51 is urged to the limit position on the plug tip side by the third coil spring 52, and the annular engagement portion 59 of the movable member 51 and the annular non-engagement portion 48 of the plug 40 are engaged. It is in a state. At this time, the distal end portion 55 of the movable member 51 is located at a protruding position that protrudes further toward the plug distal end side than the distal end of the plug 40.

  5 (a) to 5 (b), the joint member 20 is configured such that the outer peripheral surface of the joint member 20 is guided by the inner peripheral surface of the cylindrical housing 50, and the shaft center of the joint member 20 is plugged. It moves toward the plug base end side in a state of substantially coinciding with the 40 axis. Then, as shown in FIG. 5B, the distal end member 24 on the non-connector side of the tubular main body 21 of the joint member 20 contacts the distal end portion 55 of the movable member 51. At this time, the outer diameter of the movable member 51 is configured to be smaller than the inner diameter of the sleeve member 34, and 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.

  In the connection transition state shown in FIG. 5B, the movable member 51 has a facing surface provided at the distal end portion 55 abutting against a facing surface facing the axial direction of the distal end member 24. Thus, when the plug 40 enters the cylindrical main body 21 of the joint member 20, the opposing surfaces of the distal end member 24 and the movable member 51 come into contact with each other so that the movable member 51 is plugged in the axial direction at the distal end member 24. Pressed to the side.

  In the connection transition state shown in FIG. 6A, the internal contact portion 60 that is a connection release member also contacts the sleeve member 34 of the joint member 20 and is pushed from the plug distal end side to the proximal end side.

  In the transition from the connection transition state shown in FIG. 6 (a) to the connection completion state shown in FIG. 6 (b), the joint member 20 is switched from the closed state shown in FIG. 1 to the open state shown in FIG. The sleeve member 34 projects to the non-connector side (left side in FIG. 6B). In the connected state of FIG. 6B, the actuating member 33 abuts on the end surface 47 on the tip end side of the plug 40, retreats to the connector side, and is positioned on the outer diameter side by the outer peripheral surface of the tip end of the actuating member 33. The locking ball 35 located on the first restricting surface 25 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 retraction position, which is the limit position on the plug base end side. At this time, the tip member 24 on the non-connector side of the tubular main body 21 of the joint member 20 is biased toward the connector side by the movable member 51, but the locking ball 35 of the joint member 20 locks the plug 40. Since it fits in the groove part 42, the connection state to the plug 40 of the coupling member 20 is maintained.

(Fitting member separation operation)
At the time of transition from the connection state shown in FIG. 6B to the connection transition state shown in FIG. 6A, the operator holds the external operation unit 61 of the erroneous connection prevention device 100 and plugs from the plug proximal end side. By moving to the distal end side, the internal contact portion 60 fixed to the external operation portion 61 comes into contact with the sleeve member 34, and the sleeve member 34 is moved to the connector side (right side in FIG. 6B). The movement of the sleeve member 34 moves the first restricting surface 25 located on the radially outer side of the sleeve member 34 to a position facing the locking ball 35 in the axial direction, and the locking ball 35 is detached from the locking groove portion 42. Be released. As a result, the sleeve member 34 is held by the locking ball 35 on the connector side (right side in FIG. 6B).
At the same time, the actuating member 33 is urged from the connector side to the non-connector side (from the right side to the left side in FIG. 6A) by the first coil spring 31 and seals the fluid flow path 22. Shifts from the open state shown in FIG. 3 to the closed state shown in FIG.
In the connection transition state shown in FIGS. 6A and 5B, the joint member 20 moves from the plug proximal end side to the distal end side in a state along the inner peripheral surface of the cylindrical housing 50. Accordingly, the movable member 51 shifts to a protruding state in which the third coil spring 52 protrudes toward the plug distal end side by the biasing force from the plug proximal end side to the distal end side.
In the disconnected state shown in FIG. 5A, the movable member 51 has the inner annular engagement portion 59 engaged with the annular engaged portion 48 of the plug 40, so that the distal end of the plug 40 moves to the distal end side of the plug. Maintain the protruding state.

(Hose direct connection operation)
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.
Since the outer diameter of the plug 40 is usually larger than the inner diameter of the hose 10, the user presses the inner diameter surface of the hose 10 against the outer peripheral surface of the plug 40 and plugs the hose 10 in the axial direction. By pushing into the end side, the plug is inserted into the hose 10 while expanding the diameter of the hose 10.
As shown in FIG. 7, when the hose 10 is to be connected to the plug 40, the movable member 51 is connected to the plug tip side (right side in FIG. 7) rather than the tip of the plug 40 when the hose 10 is connected to the plug 40. Since the hose 10 is configured so as to be able to restrain the diameter of the hose 10 by being in contact with the outer peripheral part of the hose 10 at the part protruding in the direction, the movable member 51 is located at the part protruding toward the plug tip side from the tip of the plug 40. It contacts the outer peripheral part of the hose 10. Thereby, the outer peripheral site | part of the hose 10 will be covered by the movable member 51, and the diameter expansion of the hose 10 will be suppressed. Thereby, even if a user tries to connect the hose 10 directly to the plug 40, the movable member 51 can suppress the diameter expansion of the hose 10 and appropriately suppress the plug 40 from entering the inside of the hose 10, An erroneous connection to the plug 40 of the hose 10 can be prevented.
In this way, the erroneous connection prevention device 100 of the present invention exhibits a function of preventing erroneous connection to the plug 40 of the hose 10.

[Second Embodiment]
Next, for the second embodiment of the erroneous connection prevention device 100 of the present invention, FIG. 8 [perspective view], FIG. 9 [cross-sectional view of the disconnected state and connected state], FIG. 10 [cross-sectional view of the hose connection transition state] FIG. 11 will be described based on a side view for showing a connection release operation through the operation opening.
As shown in FIG. 8, the erroneous connection preventing apparatus 100 according to the second embodiment is different from that of the first embodiment in that an operation opening 66 is provided in the cylindrical housing 50, and There is no particular change except that a plurality of tip contact portions 68 are provided on the plug tip side of the movable member 51. In the following description, the same structure and members as those in the first embodiment are denoted by the same reference numerals, and the description thereof may be omitted.

As shown in FIG. 8, the operation opening 66 of the cylindrical housing 50 is located on the plug tip side from the center of the cylindrical housing 50 in the axial direction, and on the lateral side on the back side and the front side of the paper surface in the circumferential direction. A pair is provided at the site. Thereby, in particular, in the connected state of the plug 40 and the connecting joint 20 shown in FIG. 11A, the sleeve member 34 inside the cylindrical housing 50 can be directly moved from the operation opening 66. it can. Accordingly, the user moves the sleeve member 34 from the operation opening 66 in the axial direction from the plug proximal end side to the distal end side, so that the connection state shown in FIG. 11A is shown in FIG. 11B. It is possible to shift to a disconnected state.
As shown in FIG. 8, an elliptical curved concave portion 67 having a long axis in the axial direction when viewed from the side is provided around the operation opening 66. Thus, in the connected state shown in FIG. 11A, the user slides his / her finger from the plug base end side to the tip end side in the axial direction, for example, along the curved recess 67. The sleeve member 34 inside the operation opening 66 can be relatively easily moved from the non-connector side to the connector side.

  As shown in FIG. 8, a plurality of tip contact portions 68 of the movable member 51 are provided at the tip of the movable member 51, and are distributed in the circumferential direction. As shown in FIG. 9B, all of the plurality of tip abutting portions 68 are so arranged that their tips abut on the tip member 24 of the cylindrical main body 21 of the joint member 20, as in the first embodiment. Has been placed. As shown in FIG. 10, when the hose 10 enters, the inner diameter of each of the plurality of tip contact portions 68 is provided at a position in contact with the outer peripheral surface in the axial radial direction of the hose. Thereby, the plurality of tip contact portions 68 are in a state of covering the tip of the hose 10, and the shaft of the hose 10 is in a state where the hose 10 is in contact with the end surface 47 on the tip side of the plug 40, as in the first embodiment. Diameter expansion in the radial direction can be prevented.

(Fitting member connection operation)
Next, in the connection operation of the joint member 20 to the plug 40, the operation of the plurality of tip contact portions 68 provided at the tip of the movable member 51 will be described with reference to FIG.
In FIG. 9A, in the disconnected state, the movable member 51 is urged by the third coil spring 52 to the protruding position that is the limit position on the distal end side of the plug, and the outer diameter portion on the plug proximal end side of the movable member 51. The claw portion 69 provided toward the outer side in the axial radial direction maintains an engaged state in which it engages with the annular convex portion 71 protruding toward the inner side in the axial radial direction at the inner diameter portion of the cylindrical housing 50. .
In this state, when the joint member 20 enters the plug proximal end side, as shown in FIG. 9B, all of the plurality of distal end abutting portions 68 at the distal end of the movable member 51 are cylindrical in the connection joint 20. It abuts on the tip member 24 of the main body 21. Further, the plurality of distal end abutting portions 68 are pushed toward the plug proximal end side by the distal end member 24, and shift to the connected state shown in FIG. 9B.
As shown in FIG. 9B, in the connected state in which the joint member 20 is connected to the plug 40, the movable member 51 is pushed to the retracted position that is the limit position on the plug base end side. The joint member 20 is in an open state because the operating member 33 is in contact with the end face 47 on the distal end side of the plug 40 and pushed into the connector side. At the same time, the sleeve member 34 protrudes to the non-connector side (left side of FIG. 9A). At this time, since the plurality of tip contact portions 68 are provided on the inner side in the axial direction than the inner diameter of the sleeve member 34 of the joint member 20, they do not contact the sleeve member 34.

(Hose direct connection operation)
Next, the operation when the hose 10 is directly connected will be described. As shown in FIG. 10, in the state where the tip of the hose 10 is in contact with the end face 47 on the tip side of the plug 40, the periphery of the outer periphery of the tip of the hose 10 is arranged along the periphery of the outer periphery. The plurality of tip contact portions 68 at the tip of the provided movable member 51 are held and the diameter of the hose 10 is prevented from expanding. Thereby, it is suppressed that the hose 10 makes the plug 40 approach the inner side, and it expands, and the misconnection with respect to the plug 40 of the hose 10 is prevented.

(Fitting member separation operation)
Next, in the separation operation of the joint member 20 with respect to the plug 40, the separation operation performed by the user through the operation opening 66 of the cylindrical housing 50 will be described with reference to FIG.
As shown in FIG. 11A, the user can directly move and operate the sleeve member 34 provided inside the cylindrical housing 50 through the operation opening 66. That is, the user follows the curved concave portion 67 provided around the operation opening 66 and extends in the axial direction from the plug proximal end side to the plug distal end side (the right side in FIG. 11A). By operating the sleeve member 34 inside the operation opening 66, the sleeve member 34 can be retracted to the connector side and can be shifted from the connected state to the disconnected state.

[Another embodiment]
Hereinafter, another embodiment of the erroneous connection prevention device 100 of the present invention will be described.
(A)
In the second embodiment, when the joint member 20 is connected to the plug 40, the tip contact portion 68 of the movable member 51 is configured to contact the tip member 24 of the tubular body 21 of the joint member 40. Shows what is pushed into the plug base end side. The erroneous connection preventing apparatus 100 according to the present invention is configured such that, for example, the distal end abutting portion 68 abuts on the distal end portion of the sleeve member 34 of the joint member 40, and the sleeve member 34 shifts to the protruding posture. The plug may be pushed into the base end side. In this case, it is preferable that the urging force of the third coil spring 52 that urges the movable member 51 toward the plug tip side is set to be smaller than the urging force of the second coil spring 32 protruding from the sleeve member 34.

  The erroneous connection prevention device of the present invention has an erroneous connection state in which a hose is directly connected to the plug by attaching the erroneous connection prevention device referred to in the present application to a plug provided in a gas appliance or the like. It can be effectively used as a device that positively prevents this.

10: Hose 20: Joint member 34: Sleeve member 35: Locking ball 40: Plug 41: First annular portion 42: Lock groove portion 43: Second annular portion 44: Large diameter portion 45: Plug body 50: Cylindrical housing 51: Movable member 60: Internal contact part 61: External operation part 66: Operation opening part 100: Incorrect connection prevention device

Claims (9)

A plug provided with a connector to which a connector to which a hose is connected, a sleeve member movable in the axial direction, and a coupling member having a locking ball are connected is provided with an internal fluid extending from the distal end to the proximal end in the axial direction. A flow path is provided, a first annular portion, a lock groove portion for receiving the locking ball, and a second annular portion are provided from the proximal end to the distal end side of the connection portion, and the joint member is connected to the plug. A misconnection prevention device used for the hose connection structure
The cylindrical housing that can be attached to the plug protrudes more toward the plug tip than the tip of the plug in the axial direction at the outer peripheral portion of the first annular portion, the lock groove portion, and the second annular portion of the plug. A movable member that is movable in the axial direction between a projecting position that is retracted and a retracted position that is retracted to the plug base end side relative to the projecting position, and a movable member that urges the movable member in the axial direction toward the projecting position Biasing means,
The size of the movable member in the axial diameter direction is such that when the joint member is connected to the plug, the end portion of the joint member on the plug proximal end side and the end portion of the movable member on the plug distal end side contact each other. Is the size that is possible,
When the hose is connected to the plug, the movable member is configured to contact the outer peripheral portion of the hose at a portion that protrudes more toward the plug tip than the tip of the plug, and to suppress the diameter expansion of the hose. Misconnection prevention device.   2. The misconnection prevention device according to claim 1, wherein the inner diameter of the movable member on the plug distal end side is configured to gradually narrow in the axial direction from the plug distal end side to the proximal end side.   3. The error according to claim 1, wherein a plurality of distal end abutting portions are provided at the distal end of the movable member so as to be dispersedly disposed in a circumferential direction thereof and abutted against an end portion of the joint member on a plug proximal end side. Connection prevention device.   In the joint member, when the joint member is connected to the plug, the end portion on the plug proximal end side of the joint member is in contact with the movable member on the inner diameter side of the sleeve member in the axial radial direction. The sleeve member is configured to be movable in an axial direction between an outer peripheral portion of the movable member and an inner peripheral portion of the cylindrical housing in an axial radial direction. The erroneous connection prevention device according to any one of the above.   The cylindrical housing has a shape projecting toward the plug tip side from the movable member positioned at the projecting position in the axial direction at the outer peripheral portion of the movable member, and on the entire circumference in the circumferential direction of the movable member. The erroneous connection preventing apparatus according to any one of claims 1 to 4, wherein the erroneous connection preventing apparatus is formed in a shape covering the entire area.   The cylindrical housing is provided with an operation opening capable of moving the sleeve member on the inner side thereof from the outside to the plug tip side in the axial direction in a connected state in which the joint member is connected to the plug. Item 6. An erroneous connection prevention device according to any one of Items 1 to 5.   In the connected state in which the joint member is connected to the plug, a connection release member that releases the connection of the joint member to the plug by a movement operation in the axial direction is provided, and the connection release member moves in the axial direction. The erroneous connection prevention according to any one of claims 1 to 6, wherein the connection of the joint member to the plug can be released by pressing an end of the sleeve member on the plug base end side by an operation. apparatus.   The connection release member is an internal contact portion that can freely contact the end portion of the sleeve member on the plug proximal end side in an inner peripheral portion of the cylindrical housing in a connected state in which the joint member is connected to the plug. And an external operation portion that is movable in the axial direction at the outer peripheral portion of the cylindrical housing, and the internal contact portion is connected to the end of the sleeve member on the plug base end side by movement of the external operation portion in the axial direction. The erroneous connection preventing apparatus according to claim 7, wherein the erroneous connection preventing apparatus is configured to be able to be pressed by being in contact with a portion.   The erroneous connection preventing device according to claim 8, wherein the internal contact portion is provided to be movable in an axial direction at an outer peripheral portion of the movable member.

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