JP2009287684A - Incorrect connection arrester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an incorrect connection arrester capable of arresting a direct connection to the plug of a hose and capable of excellently connecting on the connection to the plug of coupling. <P>SOLUTION: The incorrect connection arrester is freely detachably mounted on the outer diameter side by crossing over a first annular part 14 and a second annular part 16 of the plug 3 and at the same time, from the top-end side in the axis line direction to the rear end side an approach of a coupling member 1 is permitted and a cylindrical casing 51, in the approach of the hose 2 from the top end side to the rear end side, and an arresting mechanism 52 to arrest the approach of the hose 2 are provided and the arresting mechanism 52 drops out to the outer diameter side in the approach of the coupling member 1 from the top end side to the rear end side is permitted as a configuration. In the connecting operations to connect to the plug 3 with the coupling member 1, connections of both parties can be admitted. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to an erroneous connection preventing device that prevents a hose (for example, a gas hose) that should be connected to a plug through a joint member from being directly connected to the plug.
The erroneous connection prevention device proposed in the present application is not conventionally known, and has been newly 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 this patent document 1, the connection detection means is provided in the plug, thereby reliably detecting an erroneous connection state in which the gas hose is directly connected to the plug of the gas equipment.

  This application also relates to the problem that when a hose is connected to a plug provided on the gas equipment side, a normal connection state in which the hose is connected to the plug directly occurs and a problem in which the hose is directly connected to the plug occurs. Whereas Reference 1 was intended to identify and detect both states, the present application actively prevents the occurrence of an erroneous connection state by mounting the erroneous connection prevention device referred to herein on the plug. .

  Hereinafter, first, in the present application, the connection of the hose 2 to the plug 3 via the joint member 1 as a premise thereof will be described. FIG. 1 shows the structure of the joint member 1, and FIG. 2 shows the structure of the plug 3. FIG. 1 shows a closed state in which the outflow of fluid from the joint tip is stopped without connecting the joint member 1 to the plug 3. On the other hand, FIG. 3 shows a state in which the joint member 1 is connected to the plug 3, a fluid flow path is formed across the hose 2, the joint member 1, and the plug 3, and gas can be supplied from the hose 2 side to the gas device. Show. In this state, the joint member 1 is in an open state in which the outflow of fluid from the joint tip is allowed.

Hereinafter, the configuration of 1 joint member 1, the configuration of 2 plug 3, 3 the operation of connecting the joint member 1 to the plug 3, 4 the operation of separating the joint member 1 from the plug 3 will be described in this order. .
1 Structure of Joint Member As shown in FIG. 1, the joint member 1 is roughly movable in the axial direction within the connector 4 to which the hose 2 is connected, the cylindrical main body 5 connected to the connector 4, and the cylindrical main body 5. An actuating member 6, a sleeve member 7 that is axially movable at the outer peripheral portion of the cylindrical main body 5, and a non-connector side of the cylindrical main body 5. Is provided with a ball 8 for locking. The joint member 1 is provided with a cover member 9 integrated with the cylindrical main body 5 and a tip member 10 for positioning the locking ball 8 from the tip side. Between the connector 4 and the operating member 6, a first coil spring 11, which is an urging member that urges the operating member 6 toward the distal end with respect to the connector 4, is provided. In between, a second coil spring 12 is provided as a biasing member that biases the sleeve member 7 toward the distal end side with respect to the cover member 9.

  Here, the cover member 9 is mainly used to hold the joint member 1 when the joint member 1 is connected to the plug 3. On the other hand, as can be seen from FIG. 1, the sleeve member 7 is movable in the axial direction with respect to the cylindrical main body 5 and the tip member 10, and in the above-described closed state, the sleep member 7. Is positioned at the same end surface with respect to the tip member 10. On the other hand, as can be seen from FIG. 3, in the above-described open state, the sleep member 7 is positioned at a position where the sleeve member 7 protrudes toward the distal end side with respect to the distal end member 10.

  Now, a non-connector side portion in the axial direction of the sleeve member 7 is provided with a first restriction surface 7a for restricting the locking ball 8 to the outer diameter side position, and on the connector side from the first restriction surface 7a, A second regulating surface 7b that regulates the locking ball 8 to the inner diameter side position is provided. In the closed state shown in FIG. 1, due to the positional relationship between the locking ball 8 and the sleeve member 7, the locking ball 8 is restricted from moving in the radial direction by the first regulating surface 7a, and the operating member 6 is moved 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 8 and the sleeve member 7, the locking ball 8 is restricted from moving in the radial direction by the second restriction surface 7b, and the actuating member 6 moves to the connector side. In such an open position, fluid outflow from the joint tip is allowed. Accordingly, the joint member 1 is configured to be switchable between a closed state and an open state.

2 Configuration of Plug The plug 3 includes a plug body and a connection portion 13 to which the joint member 1 is connected. The plug 3 includes an internal fluid flow path 30 extending from the distal end to the proximal end in the axial direction. A first annular portion 14, a lock groove portion 15 that receives the locking ball 8, and a second annular portion 16 are provided from the end toward the distal end side.
In the example shown in the figure, the first annular portion 14 and the second annular portion 16 are configured to have the same diameter, and the lock groove portion 15 is configured as a substantially triangular groove.
Further, the plug 3 includes a small diameter portion 17 having a diameter larger than that of the annular portion on the proximal end side from the first annular portion 14. In addition, a plug body having a larger diameter is further provided on the base end side.
The relationship between the small-diameter portion 17 and the plug body and the sleeve member 7 described above is such that the outer diameter of the small-diameter portion 17 is smaller than the inner diameter of the sleeve member 7 as can be seen from FIG. Is set to be larger than the outer diameter of the sleeve member 7, and the sleeve member 7 is configured to be fitted onto the small-diameter portion 17 when the sleeve member 7 protrudes in the open state.

3 Connection operation of the joint member to the plug When connecting the joint member 1 to the plug 3, the operator holds the cover member 9 of the joint member 1 and causes the plug 3 to enter the inside of the joint member 1. In this state, the joint member 1 is in the closed state shown in FIG. In the approach operation, the tip of the plug 3 abuts on the tip of the operating member 6 and pushes in the operating member 6. In this situation, the joint member 1 is switched from the closed state shown in FIG. 1 to the open state shown in FIG. 3, and when the locking ball 8 fits into the lock groove portion 15 as the plug 3 enters. The holding of the sleeve member 7 to the proximal end side by the locking ball 8 is released, and the sleeve member 7 protrudes to the distal end side. This state is the state shown in FIG. 3, that is, the open state.

4 Separating operation of the joint member from the plug When releasing the joint member 1 from the plug 3, the operator holds the sleeve member 7 of the joint member 1 and moves the sleeve member 7 to the proximal end side of the joint member 1. Let In the state before the movement, the joint member 1 is in the open state shown in FIG. In the moving operation, the sleeve member 7 is moved to the proximal end side against the urging force of the second coil spring 12, and the locking ball 8 comes to a position facing the first regulating surface 7a, so that the locking ball 8 can be detached from the lock groove 15, the sleeve member 7 can be returned to the proximal end side, and the joint member 1 can be separated from the plug 3. This state is the state shown in FIG. 1, that is, the closed state.

JP 2006-83989 A

In the said structure, although a joint member can be connected appropriately to a plug, the misconnection which a hose is directly connected to a plug cannot be prevented. And even if it is an apparatus which can prevent a misconnection, it is necessary to set it as the apparatus which can perform this satisfactorily at the time of the connection of a coupling member simultaneously.
The present invention has been made in view of the above problems, and the object thereof can be employed in a hose connection structure for connecting a joint member as described above to a plug, and a direct connection of a hose to a plug. With respect to the connection, it is possible to prevent this, and the connection of the joint member to the plug is to provide an erroneous connection prevention device that can satisfactorily perform this.

In order to achieve the above object, the first characteristic configuration of the erroneous connection preventing apparatus according to the present invention is as follows:
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 on 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. Closed in which the outflow of the fluid from the joint tip on the non-connector side is stopped in the closed posture in which the movement ball is restricted in the radial direction by the first restriction surface and the operating member moves to the non-connector side. And an open state in which the outflow of fluid from the joint tip is allowed in an open posture in which the locking ball is restricted from moving in the radial direction by the second restriction surface and the operating member is moved to the connector side. A joint member that can be switched between,
A plug main body and a connection portion to which the joint member is connected are provided, and an internal fluid flow path extending from the axial front end to the base end is provided, and a first annular shape is formed from the base end of the connection portion toward the front end side. 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,
In the configuration that can be mounted on the outer diameter side across the first annular portion and the second annular portion of the plug, and allows the joint member to enter from the distal end side to the proximal end side in the axial direction,
In the approach of the hose from the distal end side toward the proximal end side, a cylindrical housing, and a blocking mechanism that prevents the hose entry,
A connection operation for connecting the joint member to the plug in a configuration in which the blocking mechanism is retracted to the outer diameter side to allow the joint member to enter when the joint member enters from the distal end side toward the proximal end side. In the above, the joint member reaches the plug and allows the connection therebetween.

  According to the first characteristic configuration, the erroneous connection preventing device includes the cylindrical housing and the blocking mechanism. As will be described later, this misconnection prevention device is used by being attached to the outer peripheral portion of the plug, but by providing a blocking mechanism, in this attached state, from the distal end side to the proximal end side in the axial direction of the hose. Can be prevented from entering. On the other hand, in the connection operation for connecting the joint member to the plug, the blocking mechanism is configured to allow the joint member to enter in the approach of the joint member from the distal end side toward the proximal end side in the axial direction. Since the blocking mechanism retreats to the outer diameter side and allows the joint member to reach the plug and change from the closed position to the open position, the connection of the joint member to the plug can be performed satisfactorily.

The second characteristic configuration of the erroneous connection preventing device according to the present invention is such that, in addition to the first characteristic configuration, in the connected state in which the joint member and the plug are connected, the two are connected by a movement operation in the axial direction. A connection releasing member that can be released is provided, and the connection releasing member is configured to release the connection between the two by releasing the distal end of the sleeve member by a movement operation in the axial direction.
In this configuration, by providing the connection release member, the connection can be released by operating this member. In the present application, when the erroneous connection preventing member is mounted on the plug and the connection between the joint member and the plug is completed, the sleeve member of the joint member may be entirely located in the apparatus. In this case, it becomes impossible to release the connection between the joint member and the plug via the sleeve member, but the connection release can be performed satisfactorily by providing the connection release member.

In addition to the second feature configuration described above, the third feature configuration of the erroneous connection prevention device according to the present invention is such that, in the connection operation for connecting the joint member and the plug, the connection release member is moved from the distal end side to the proximal end side. The connection releasing member is positioned in a connected state in which the ball for locking is inserted into the lock groove.
With this configuration, the connection release member can be reliably positioned in this state in a state where the connection between the joint member and the plug is established.

A fourth feature configuration of the erroneous connection preventing apparatus according to the present invention is the base end side end surface member provided on the base end side in addition to the second or third feature configuration, wherein the base end side The end face member is moved to the front end side, whereby the connection between the two is released.
This configuration is an example in which the connection release member is configured as a proximal end surface member, and the connection between the joint member and the plug can be released by operating this member from the proximal end side.

In addition to the second or third characteristic configuration described above, the fifth characteristic configuration of the erroneous connection prevention device according to the present invention includes:
The connection release member is a member provided with a projecting operation part extending from the inside of the apparatus to the outside, and the projecting operation part is moved to the distal end side to release the connection between the two.
This configuration is an example in which the connection release member is configured as a member having a projecting operation part extending from the inside of the apparatus to the outside, and by operating the projecting operation part arranged to extend, for example, to the outer diameter side inside the apparatus. The connection between the joint member and the plug can be released.

  The sixth characteristic configuration of the erroneous connection preventing apparatus according to the present invention is that, in addition to any one of the first to fifth characteristic configurations, a plurality of blocking mechanisms are provided in the axial circumferential direction.

  According to the sixth characteristic configuration, the hose and the joint member, which are generally cylindrical, are prevented from entering the hose by a plurality of blocking mechanisms provided in the axial circumferential direction, and the joint member is prevented from entering the joint member. The hose and the joint member can be held in a balanced posture in the axial circumferential direction, and a stable operation can be performed.

A seventh feature of the erroneous connection preventing device according to the present invention is that, in addition to any one of the first to sixth features, the blocking mechanism swings on a cylindrical housing portion on the proximal end side in the axial direction. A proximal end member having a pivoting fulcrum at the distal end of the cylindrical housing portion, and a distal end member connected to the proximal end member so as to be swingable at a connection fulcrum; and the proximal end member. In a biased state, the base end side member is configured to include a biasing member that maintains a blocking posture capable of preventing the hose from entering,
In the approach of the joint member, in a state where the urging member is working, the distal end side member is swung to the outer diameter side, the base end side member is swung to the outer diameter side, and the joint member is made to enter. It is in an acceptable point.

  According to the seventh characteristic configuration, the blocking mechanism is configured by the distal end side member, the proximal end side member, and the urging member, and with respect to the entry of the hose, with respect to the distal end side member and the proximal end side member of the urging member. The entry is prevented by urging, and for the entry of the joint member, the tip side member swings to the outer diameter side, the base end side member swings to the outer diameter side, and the entry is allowed, It can work well.

The eighth characteristic configuration of the erroneous connection preventing apparatus according to the present invention is in addition to the seventh characteristic configuration,
In a state where the base end side member is in a blocking posture to prevent the hose from entering, the base end side member abuts against the connecting portion of the plug, and further swinging from the blocking posture to the inner diameter side is prevented. It is in.
With this configuration, further rocking of the proximal end member toward the inner diameter side is prevented during the entry of the hose, and the entry of the hose can be reliably prevented.

A ninth characteristic configuration of the erroneous connection preventing apparatus according to the present invention includes, in addition to any one of the first to sixth characteristic configurations, an elastic member in which the blocking mechanism is supported from the outer diameter side in the cylindrical casing. Configured,
The elastic member is provided with a joint member contact portion located on the distal end side and a hose contact portion located on the proximal end side,
In an erroneous entry state where the hose enters from the distal end side toward the proximal end side, the hose comes into contact with the hose contact portion to prevent entry of the hose,
In a normal approach state in which the joint member enters from the distal end side toward the proximal end side, the joint member contacts the joint member contact portion, and the hose contact portion is retracted to the outer diameter side, and the joint member Is allowed to enter the connecting position where it is connected to the plug.

  According to the ninth characteristic configuration, the blocking mechanism is configured as a simple elastic member, the joint member contact portion is provided on the distal end side thereof, and the hose contact portion is provided on the proximal end side. And regarding the approach of a hose, a hose contacts the hose contact part and blocks the entry of the hose in an erroneous entry state where the hose enters from the distal end side toward the proximal end side. On the other hand, with regard to the entry of the joint member, in a normal approach state where the joint member enters from the distal end side toward the proximal end side, the joint member contacts the joint member abutting portion and the joint member connects to the plug. The entry to the position is allowed and as a result the connection is acceptable.

According to a tenth characteristic configuration of the erroneous connection preventing device of the invention, in addition to any one of the second to fifth characteristic configurations, the connection release member extends in the axial direction on the outer diameter side of the cylindrical housing. A connection release operation unit is provided.
By adopting this configuration, the operator can perform the connection release operation by moving the connection release operation unit in the axial direction.

The eleventh characteristic configuration of the erroneous connection preventing apparatus according to the present invention is the one in which the joint member enters the apparatus and the joint member is connected to the plug in addition to any one of the first to tenth characteristic configurations. The sensor member for detecting the connection state is provided.
By adopting this configuration, the connection state between the joint member and the plug can be detected by the sensor member, and for example, the detection result can be output to the outside.

Embodiments of the erroneous connection prevention device 50 of the present invention will be described below with reference to the drawings.
In the hose connection structure in which the plug 3 and the joint member 1 that have been connected so far are used as a set, the erroneous connection prevention device 50 according to the present application is used by being attached to the plug 3 side. 3 is permitted, and hose 2 (specifically, gas hose) is prevented from being directly connected to plug 3.

  In order to exhibit this function, the erroneous connection preventing device 50 utilizes the relationship between the outer diameter of the hose 2 and the outer diameter of the sleeve member 7 provided in the joint member 1. The relationship between the two will be described. The outer diameter of the hose 2 is set to be smaller than the outer diameter of the joint member 1. For example, the hose 2 is prevented from entering a radial position where the hose 2 cannot enter (a position corresponding to the hose 2). A member can be provided. On the other hand, as the joint member 1 enters, the hose 2 enters the radial position (position larger than the outer diameter of the hose 2 and smaller than the outer diameter of the joint member 1) where the joint member 1 comes into contact. The function part which cancels | releases the blocking function of the member which blocks | prevents can be provided. The erroneous connection prevention device 50 of the present application uses this dimensional relationship to allow the connection of the joint member 1 described above to the plug 3 and prevent the hose 2 from being directly connected to the plug 3. is there.

In the present application, two embodiments are introduced. 4 to 7 are drawings showing the first embodiment, and FIGS. 8 to 11 are drawings showing the second embodiment.
In addition, the structures of the joint member 1 and the plug 3 are the same as those described in the background art section above, so that the structures will be additionally described when necessary.

In the following description, description will be made in the order of 1 first embodiment and 2 second embodiment.
1 First Embodiment 1-1 Structure FIGS. 4 and 5 show the structure of this example and the connection state of the joint member, and FIG. 6 shows the connection operation step by step. FIG. 7 shows the prevention.
FIG. 4A is a side view of the erroneous connection preventing device 50 (the device 50 viewed from the axial direction). FIG. 4B is a cross-sectional view of the device 50, and FIG. 4C is an exploded perspective view of the device 50. 5 (a) and 5 (b) show the state in which the device 50 is mounted on the plug 3 in cross section, and the state in which the joint member 1 enters the device 50 and is connected to the plug 3 is shown in FIG. It is indicated by a dotted line. FIG. 5A shows a state when entering, and FIG. 5B shows a state when connecting.

Here, definitions of the distal end side and the proximal end side of the joint member 1, the plug 3, and the erroneous connection preventing device 50 used in the present application will be described.
Regarding the joint member 1, the side to which the hose 2 is connected is the base end side, and the side connected to the plug 3 opposite to the hose connection side is the tip side. In FIG. 5B, the right side is the proximal end side of the joint member 1 and the left side is the distal end side.
With respect to the plug 3, since this type of plug 3 is provided in a gas device or the like, the gas device side is the base end side, and the side to which the joint member 1 opposite to the gas device side is connected is the tip side. In FIG. 5A, the left side is the proximal end side of the plug 3 and the right side is the distal end side.
Regarding the erroneous connection prevention device 50, since this type of erroneous connection prevention device 50 is used by being attached to the plug 3, the same definition as the plug 3 is used, and the proximal end side of the plug 3 is connected to the erroneous connection prevention device. The proximal end side of 50 and the distal end side of the plug 3 are defined as the distal end side of the erroneous connection preventing device 50. In FIG. 5A, the left side is the proximal end side of the erroneous connection preventing device 50, and the right side is the distal end side.

As shown in FIG. 4, the erroneous connection preventing device 50 of this example includes a cylindrical housing 51 and a blocking mechanism 52, and the blocking mechanism 52 has a basic configuration as shown in FIG. 7. In addition, when the hose 2 enters from the distal end side toward the proximal end side in the axial direction, the hose 2 is prevented from entering.
As shown in FIG. 4, the cylindrical casing 51 is configured as a substantially cylindrical member, and includes a cylindrical main body 53, a proximal end surface member 54, and a distal end surface member 55. Has been.
As can be seen from FIG. 4 (c), the cylindrical main body 53 is provided with a fulcrum fulcrum forming portion 53a and a proximal cylindrical projection 53b fitted into the proximal end member 54 respectively provided on the axial end surface. And is configured. These three members 53, 54, and 55 are configured to form a cylindrical shape in a combined state. The cylindrical main body portion 53 and the base end side end surface member 54 are configured to be slidable in the axial direction, and when the plug 3 is simply attached with the erroneous connection prevention device 50, the cylindrical main body portion 53 and Accordingly, the base end side end surface member 54 takes a posture (the posture shown in FIGS. 6A to 6D) in which the entire surface thereof is in contact with the cylindrical main body portion 53 in the radial direction. On the other hand, in a state in which the connection between the plug 3 and the joint member 1 is completed, the proximal end surface member 54 moves relative to the tubular main body 53 in the axial direction proximal end, and an inner extension described later. Only the portion 54b is configured to be in sliding contact (the posture shown in FIG. 6E). And when releasing operation of the coupling member 1 from the plug 3, the structure which can cancel | release both members 3 and 1 is employ | adopted by pushing this proximal end surface member 54 into the cylindrical main-body part 53 to an axial direction. Yes. That is, the proximal end surface member 54 functions as a connection release member in the present application.
On the other hand, the distal end side end face member 55 is integrated with the cylindrical main body 53 and does not slide in the axial direction.

  The proximal end surface member 54 is provided with a circular opening 54 a in the inner diameter portion thereof, and is configured to allow the plug 3 to enter the cylindrical main body 53. That is, the opening 54a is configured to be slightly larger than the outer diameters of the first annular portion 14 and the second annular portion 16 of the plug 3, thereby allowing the plug 3 to enter and being attached thereto. . Further, the proximal end surface member 54 extends inward in the axial direction of the cylindrical main body 53, and a contact surface that abuts the distal end surface of the joint member 1 on the distal end portion thereof (see FIG. 4C). The inner extension part 54b provided is provided. The inner extending portion 54b is equally provided at three locations in the circumferential direction. Further, on the proximal end side of the inner extension portion 54 b, the proximal end surface member 54 prevents the separation from the cylindrical main body portion 53 in the state where the connection between the plug 3 and the joint member 1 is completed. A separation prevention part 54c is provided.

  The distal end surface member 55 is also provided with a circular opening 55a at the inner diameter portion thereof, and is configured to allow the joint member 1 to enter the cylindrical main body 53. That is, the opening 55 a is configured to be slightly larger than the outer diameter of the sleeve member 7 of the joint member 1, thereby allowing the sleeve member 7 to enter.

Blocking Mechanism As shown in FIGS. 4B and 4C, three blocking mechanisms 52 are provided equally in the circumferential direction. The number of blocking mechanisms 52 may be a pair or more as necessary.
The blocking mechanism 52 includes a proximal end member 56, a distal end member 57, and an urging member 58. As can be seen from FIG. 4C, the base end side member 56 is configured to include a pair of portions facing each other by bending a single plate member. A part of the front end side member 57 that is also a plate-like member enters between the pair of portions.
The base end side member 56 is swingably supported by a swing fulcrum forming portion 53 a provided on the base end side of the cylindrical main body 53 via a swing shaft 59. Therefore, it becomes the structure which has a rocking | fluctuation fulcrum in the cylindrical housing | casing site | part of the base end side in an axial direction.
The distal end side member 57 is swingably supported by a swing fulcrum forming portion 53 a provided on the distal end side of the cylindrical main body portion 53 via a swing shaft 59. Therefore, it becomes the structure which has a rocking | fluctuation fulcrum in the cylindrical housing | casing site | part of the front end side in an axial direction.
Both members 56 and 57 are slidably connected via a connecting fulcrum 60 that can be oscillated differently at an intermediate portion between the oscillating fulcrums. As a result, as shown in FIGS. 5A and 5B, both members 56 and 57 can swing while being supported from the three fulcrums 59, 60 and 59.
The urging member 58 is composed of a simple coil spring, and as shown in the drawing, the distal end side member 57 is moved from the position on the outer diameter side of the swing fulcrum to the distal end side member 57 and the proximal end side member 56. Is pivoted so as to move the connecting fulcrum to the inner diameter side. Therefore, with this urging force, the base end side member 56 also takes the swinging posture moved to the inner diameter side.
As a result, as shown in FIG. 7, when the joint member 1 is not inserted into the erroneous connection preventing device 50 (simply attached to the plug 3), the coil spring 58 causes the base member 57 to pass through the distal end side member 57. In the biased state in which the end side member 56 is biased toward the inner diameter side, the base end side member 56 can be maintained in a blocking posture in which the hose 2 can be prevented from entering by the hose contact portion 56a.
On the other hand, with regard to the entry of the joint member 1, the tip side member 57 takes the posture shown in FIG. 5A with the coil spring 58 acting, and in this state, the swing fulcrum and the connection fulcrum of the tip side member 57. The joint member abutting portion 57a provided between the sleeve member 7 and the sleeve member 7 is configured to abut on the outer diameter tip. The contact portion 57a causes the distal end side member 57 and the base end side member 56 to swing around the swing fulcrum toward the outer diameter side by the contact of the sleeve member 7 with the contact portion 57a. 1 is allowed to enter.
As a result, the blocking mechanism 52 is configured such that, in the connection operation for connecting the joint member 1 to the plug 3, the blocking mechanism 52 is retracted to the outer diameter side to allow connection between the joint member 1 and the plug 3. Yes.

  As shown in FIGS. 5 and 7, in the biased state by the coil spring 58, the vicinity of the distal end of the base end side member 56 abuts on the outer diameter portion of the second annular portion 16, and the hose 2 enters the operation, Further, the base end side member 56 is configured to be prevented from swinging toward the inner diameter side.

1-2 Connection Operation Hereinafter, a connection operation of the joint member 1 and the hose 2 in a state where the erroneous connection prevention device 50 of the present example is attached to the plug 3 will be described with reference to FIGS. 6 and 7.
6 is an explanatory diagram of a state in which the joint member 1 is connected to the plug 3 (this state is referred to as a normal entry state in the present application), and FIG. 7 is a state in which the hose 2 is about to be directly connected to the plug 3. (This state is referred to as an erroneous entry state in the present application).
Normal Approach State FIGS. 6A to 6E illustrate this connection operation over time.
FIG. 6 (a)
FIG. 6A shows an initial state of the connection operation. The joint member 1 is in a non-connected state in relation to the plug 3. In this state, in the blocking mechanism 52, both the distal end side member 57 and the proximal end side member 56 are urged by the urging member 58. In this state, the connection fulcrum of both is positioned on the inner diameter side, and the joint member contact portion 57a of the distal end side member 57 is positioned on the inner diameter side.
As shown in the figure, in the approach operation of the joint member 1, the distal end outer diameter portion of the joint member 1 abuts on the distal end side member 57 constituting the blocking mechanism 52.

FIG. 6 (b)
FIG. 6B shows a state in which the joint member 1 has further entered, and as the joint member 1 enters, both the proximal side member 56 and the distal side member 57 swing around the swing fulcrum. The two members 56 and 57 are in a substantially straight line in the axial direction. In this state, the blocking mechanism 52 is in a state that completely allows the joint member 1 to enter the erroneous connection preventing device 50. In this figure, the tip of the joint member 1 has not yet reached the tip position of the plug 3.
FIG. 6 (c)
FIG. 6C shows a state in which the joint member 1 has further entered, and the tip of the joint member 1 is allowed in a state in which the joint member 1 is allowed to enter the erroneous connection preventing device 50 by the blocking mechanism 52. However, the second annular portion 16 is reached.
FIG. 6 (d)
FIG. 6 (d) shows a state in which the joint member 1 has further advanced. The tip of the joint member 1 is allowed in a state in which the joint member 1 is allowed to enter the erroneous connection preventing device 50 by the blocking mechanism 52. However, the state which is going to contact | abut to the inner side extension part 54b provided in the base end side end surface member 54 is shown. When the entry of the joint member 1 further proceeds from this state, the proximal side end face member 54 slides toward the proximal side with respect to the cylindrical main body 53 as the joint member 1 enters, and the proximal side The end face 54 is separated from the cylindrical main body 53. In this state, the connection between the plug 3 and the joint member 1, that is, the drop of the lock ball 8 into the lock groove portion 15 has not yet occurred.
FIG. 6 (e)
FIG. 6E shows a state in which the joint member 1 has further entered, and shows a state in which the connection between the plug 3 and the joint member 1 is completed. That is, with the positional relationship shown in the figure, the locking ball 8 falls into the locking groove 15 and the connection of the joint member 1 to the plug 3 is completed. In this state, the blocking mechanism 52 is maintained in a state that allows the joint member 1 to enter the erroneous connection preventing device 50. Then, the proximal end surface member 54 is separated from the cylindrical main body 53.

  The above is the connection operation of the joint member 1 to the plug 3, but when the joint member 1 is released from the plug 3 in a state where the erroneous connection prevention device 50 is mounted, the illustration is omitted, but it is also shown above. Thus, from the state shown in FIG. 6 (e), the sleeve member 7 of the joint member 1 is moved to the base end side of the joint member 1 by pushing the base end side end face member 54 toward the front end side. Thus, the joint member 1 with respect to the plug 3 can be released.

Incorrect entry state As shown in FIG. 7, when the hose 2 is directly entered into the erroneous connection prevention device 50, in this state, in the blocking mechanism 52, the distal end side member 57 and the proximal end side member 56 are both In a state of being urged by the urging member 58, the connection fulcrum of both is positioned on the inner diameter side, and the hose contact portion 56a of the base end side member 56 is positioned on the inner diameter side. As a result, as shown in the figure, in the entry operation of the hose 2, the hose 2 comes into contact with the hose contact portion 56 a, and the entry of the hose 2 is blocked by the base end side portion 56.

2 Second Embodiment 2-1 Structure FIGS. 8 and 9 show the structure of this example and the connection state of the joint member 1, and FIG. 10 shows the connection operation step by step. FIG. 11 shows the entry prevention.
FIG. 8A is a side view of the erroneous connection preventing device 60 (the device 60 viewed from the axial direction). FIG. 8B is a cross-sectional view of the device 60, and FIG. 8C is an exploded perspective view of the device 60. Further, FIGS. 9A and 9B show the state in which the device 60 is mounted on the plug 3 in cross section, and two states in which the joint member 1 enters the device 60 and is connected to the plug 3 are shown in two points. Shown with a chain line. FIG. 9A shows the state when entering, and FIG. 9B shows the state when connecting.

  The definitions of the distal end side and the proximal end side of the joint member 1, the plug 3, and the erroneous connection preventing device 60 used in this example are defined in the same manner as in the first embodiment.

As shown in FIG. 8, the erroneous connection preventing device 60 of this example is also configured to include a cylindrical casing 61 and a blocking mechanism 62, and the blocking mechanism 62 has a basic configuration as shown in FIG. In addition, when the hose 2 enters from the distal end side toward the proximal end side in the axial direction, the hose 2 is prevented from entering.
Cylindrical casing The cylindrical casing 61 is configured as a substantially cylindrical member as shown in FIG. 8, and includes a cylindrical main body portion 63 and a distal end side end face portion 64.
As can be seen from FIGS. 8 and 9, the cylindrical main body 63 is provided with a recess 63 b drilled from the distal end side, and an axially extending portion 64 b of the distal end surface 64 is fitted. Has been. As shown in FIG. 8A, the cylindrical main body 63 and the distal end side end face 64 are configured to form a cylindrical shape in a combined state. Further, the cylindrical main body portion 63 is provided with three holding portions 63c for positioning and holding the elastic member 72 constituting the blocking mechanism 62 in this example equally on the inner peripheral surface thereof in the circumferential direction. .
The cylindrical main body 63 is provided with a circular opening 63 a in the inner diameter portion of the base end face thereof, and is configured to allow the plug 3 to enter the cylindrical main body 63. That is, the opening 63 a is configured to be slightly larger than the outer diameters of the first annular portion 14 and the second annular portion 16 of the plug 3, thereby allowing the plug 3 to enter and connecting the erroneous connection preventing device 60 to the plug 3. It is configured to be attachable to.
Further, in the assembled state of the cylindrical main body portion 63 and the distal end side end face portion 64, a connection release member 65 and an urging member 66 for urging the connection release member 65 toward the distal end side are provided in the cylindrical main body portion 63. A configuration is adopted in which is stored. Further, a configuration is adopted in which sliding openings 67 extending in the axial direction are formed in the three recesses 63b, and the projecting operation portion 65a of the connection release member 65 is axially disposed in the sliding openings 67. It protrudes in a slidable state. In a state in which the erroneous connection prevention device 60 is simply attached to the plug 3, the connection release member 65 is positioned on the distal end side in the axial direction with respect to the cylindrical main body portion 63, and the protruding operation portion 65 a of the connection release member 65 is provided. A position (attitude shown in FIGS. 10A to 10D) in contact with the distal end side end member 64 is taken. On the other hand, in the state where the connection between the plug 3 and the joint member 1 is completed, the connection release member 65 moves relative to the tubular main body 63 relative to the axial base end side (the posture shown in FIG. 10E). Is configured to take). And when releasing operation of the joint member 1 from the plug 3, the sleeve member 7 of the joint member 1 is pushed to the base end side of the joint member 1 by moving this connection release member 65 to the front end side in the axial direction. The structure which can cancel | release the both members 1 and 3 is employ | adopted.

  The distal end side end face portion 64 is provided with a circular opening 64 a at the inner diameter portion thereof, and is configured to allow the joint member 1 to enter the joint main body portion 63. That is, the opening 64a is configured to be slightly larger than the outer diameter of the sleeve member 7 of the joint member 1, thereby allowing the joint member 1 to enter and allowing the plug 3 and the joint member 1 to be connected. ing.

Blocking Mechanism As shown in FIGS. 8B and 8C, three blocking mechanisms 62 are provided equally in the circumferential direction.
In the case of this example, the blocking mechanism 62 is composed of a single band-like elastic member 72, and a configuration is employed in which the retaining portion 63c of the cylindrical main body 63 described above is retained from the outer diameter side. Further, as shown in the figure, the elastic member 72 is formed by deforming a belt-like elastic plate material into a U shape, and connecting a joint member contact portion 72a and a hose contact portion 72b to a portion located on the inner diameter side thereof. It is prepared for. Regarding the positions of these portions in the radial direction and the axial direction, the joint member contact portion 72a is positioned on the outer diameter side of the hose contact portion 72b, and the hose contact portion 72b is connected to the joint member. It is located on the proximal end side on the inner diameter side with respect to the contact portion 72a. The position of the hose contact portion 72b in the radial direction is set to be smaller than the outer diameter of the hose 2, and further, that of the joint member contact portion 72a is set to be larger than the outer diameter of the hose 2. Therefore, the hose 2 comes into contact with the hose contact portion 72b in an erroneous entry state in which the hose 2 enters from the distal end side toward the proximal end side, and entry of the hose 2 is prevented.

On the other hand, the radial position of the joint member abutting portion 72 a is set smaller than the outer diameter of the sleeve member 7. Accordingly, the joint member 1 comes into contact with the joint member contact portion 72a in a normal approach state in which the joint member 1 enters from the distal end side toward the proximal end side. Further, the hose contact portion 72b provided on the proximal end side is retracted to the outer diameter side in a state where the joint member 1 has entered, and is configured to allow further entry of the joint member 1. As a result, entry to the connection position where the joint member 1 connects to the plug 3 is allowed.
Also in this example, the blocking mechanism 62 allows the joint member 1 to enter when the joint member 1 enters from the distal end side to the proximal end side in the axial direction, and connects the joint member 1 to the plug 3. In operation, the blocking mechanism 62 is retracted to the outer diameter side, and the joint member 1 is allowed to change from the closed posture to the open posture.

2-2 Connection Operation Hereinafter, a connection operation of the joint member 1 and the hose 2 in a state where the erroneous connection prevention device 60 of this example is attached to the plug 3 will be described with reference to FIGS.
FIG. 10 is an explanatory diagram of a state in which the joint member 1 is connected to the plug 3 (this state is referred to as a normal approach state in the present application), and FIG. 11 is a state in which the hose 2 is about to be directly connected to the plug 3. (This state is referred to as an erroneous entry state in the present application).
Normal Approach State FIGS. 10 (a) to 10 (e) illustrate this connection operation over time.
FIG. 10 (a)
FIG. 10A shows an initial state of the connection operation. The joint member 1 is in a non-connected state in relation to the plug 3, and in this state, the blocking mechanism 62 (72) is maintained in a natural state and assumes a posture in which the joint member contact portion 72 a is positioned on the inner diameter side. ing.
As shown in the figure, in the entry operation of the joint member 1, the tip outer diameter portion of the joint member 1 abuts on the joint member abutting portion 72 a of the blocking mechanism 62.

FIG. 10 (b)
FIG. 10B shows a state in which the joint member 1 has further entered, and the joint member abutting portion 72a is moved to the outer diameter side as the joint member 1 enters, and the hose abuts. The part 72b is also moved to the outer diameter side. As a result, in this state, the blocking mechanism 62 is in a state of completely allowing the joint member 1 to enter the erroneous connection preventing device 60. In this figure, the tip of the joint member 1 has not yet reached the tip position of the plug 3.
FIG. 10 (c)
FIG. 10 (c) shows a state in which the joint member 1 has further entered, and the tip of the joint member 1 is allowed in a state in which the joint member 1 is allowed to enter the erroneous connection preventing device 60 by the blocking mechanism 62. However, it reaches the second annular portion 16.
FIG. 10 (d)
FIG. 10 (d) shows a state in which the joint member 1 has further entered, and the tip of the joint member 1 is allowed in a state in which the joint member 1 is allowed to enter the erroneous connection preventing device 60 by the blocking mechanism 62. Shows a state in which the contact release member 65 is in contact. When the joint member 1 further advances from this state, the connection release member 65 slides to the proximal end side with respect to the tubular main body 63 as the joint member 1 enters. In this state, the connection between the plug 3 and the joint member 1, that is, the drop of the lock ball 8 into the lock groove portion 15 has not yet occurred.
FIG. 10 (e)
FIG. 10E shows a state in which the joint member 1 has further entered, and shows a state in which the connection between the plug 3 and the joint member 1 is completed. That is, with the positional relationship shown in the figure, the locking ball 8 falls into the lock groove 15 and the connection of the joint member 1 to the plug 3 is completed. In this state, the blocking mechanism 62 is maintained in a state that allows the joint member 1 to enter the erroneous connection preventing device 60. Then, the connection release member 65 is held at a position close to the proximal end side of the cylindrical main body 63.

  The above is the connection operation of the joint member 1 to the plug 3, but when the joint member 1 is released from the plug 3 with the erroneous connection prevention device 60 mounted, the illustration is omitted, but it is also shown above. Thus, from the state shown in FIG. 10 (e), the sleeve member 7 of the joint member 1 is moved to the proximal end side of the joint member 1 by pushing the connection release member 65 toward the distal end side by the protruding operation portion 65 a. By moving, the joint member 1 can be released from the plug 3.

Incorrect entry state As shown in FIG. 11, when the hose 2 is directly entered into the erroneous connection prevention device 60, in this state, the hose contact portion 72b is in its natural state in the blocking mechanism 62 (72). The hose 2 is prevented from entering by the hose contact portion 72b because the hose 2 is positioned at the inner diameter side position.
With the configuration described above, the hose 2 can be prevented from being directly connected to the plug 3 while the connection of the joint member 1 to the plug 3 can be satisfactorily performed.

Hereinafter, another embodiment according to the present application will be described.
(1) Detection of connection state by sensor member FIGS. 12 and 13 show examples of this configuration.
FIG. 12 is an example provided with a sensor member for detecting a connection state in which the joint member is connected to the plug in the structure of the first embodiment described above. In this example, by providing the contact-type sensor member 120 or the non-contact-type sensor member 121 at the position where the sleeve portion 7 of the joint member 1 is located in the connected state, the output from the sensor members 120 and 121 The connection state between the joint member 1 and the plug 3 can be detected.
FIG. 13 is an example provided with a sensor member for detecting a connection state in which the joint member is connected to the plug in the structure of the second embodiment described above. In this example, in consideration of the position where the sleeve portion 7 of the joint member 1 is positioned in the connected state, a pair of electrodes as the sensor member 130 is provided. In this example, one electrode is provided at a position where it contacts the distal end of the sleeve member 7 and the other electrode is provided at a position where it contacts the proximal end of the sleeve member. And it shall be connected when conduction | electrical_connection is established between a pair of these electrodes. When continuity is not established between a pair of electrodes, it is assumed that they are not connected. By comprising in this way, the connection state of the coupling member 1 and the plug 3 is detectable with the signal from these sensor members.
(2) Structure of connection release member In the examples described so far, the connection release member has basically been composed of a plate-like body. However, it is preferable that this type of connection release member has as high an operability as possible.
14 to 17 show examples in which the operability of the connection release member is improved. As can be seen from these figures, FIGS. 14 and 16 are examples corresponding to the first embodiment, and FIGS. 15 and 17 are examples corresponding to the second embodiment. In these other embodiments, each of the connection release members includes an operation part for connection release extending to the outer diameter side of the cylindrical housing.
In the examples shown in FIGS. 14 and 15, the connection release members are connection release operation units 140 and 150 that extend in the axial direction on the outer diameter side of the cylindrical housing. Therefore, in these examples, the operator can easily release the joint member 1 and the plug 3 by operating the connection release operation units 140 and 150 in the axial direction from the proximal end side to the distal end side.
In the example shown in FIGS. 16 and 17, the outer diameter of the proximal end surface member 54 that functions as the connection release member of the first embodiment is further enlarged (this enlarged portion 160 becomes the connection release operation portion referred to in the present application). In the second embodiment, a further annular portion (this enlarged portion 170 serves as a connection release operation portion in the present application) is provided on the outer peripheral side of the protruding operation portion of the connection release member 65. Therefore, in these examples, the operator can easily release the joint member 1 and the plug 3 by operating the connection release operation units 160 and 170 in the axial direction from the proximal end side to the distal end side.

  With respect to the direct connection of the hose to the plug, this can be prevented, and with respect to the connection of the joint member to the plug, an erroneous connection preventing apparatus that can satisfactorily perform this can be provided.

The figure which shows the structure of the coupling member which concerns on this application The figure which shows the structure of the plug which concerns on this application The figure which shows the connection state of a coupling member and a plug The figure which shows the structure of the misconnection prevention apparatus of 1st Embodiment. The figure which shows the structure of the misconnection prevention apparatus of 1st Embodiment. Explanatory drawing of a movement in the case of connecting a joint member to a plug equipped with a misconnection prevention device of a 1st embodiment Explanatory drawing of a movement in the case of connecting a hose to a plug equipped with a misconnection prevention device of a 1st embodiment The figure which shows the structure of the misconnection prevention apparatus of 2nd Embodiment. The figure which shows the structure of the misconnection prevention apparatus of 2nd Embodiment. Explanatory drawing of a movement in the case of connecting a joint member to a plug equipped with a misconnection prevention device of a 2nd embodiment Explanatory drawing of a movement in the case of connecting a hose to a plug equipped with a misconnection prevention device of a 2nd embodiment Illustration of another embodiment of the present application Illustration of another embodiment of the present application Illustration of another embodiment of the present application Illustration of another embodiment of the present application Illustration of another embodiment of the present application Illustration of another embodiment of the present application

Explanation of symbols

1: Joint member 2: Hose 3: Plug 7: Sleeve member 8: Locking ball 14: First annular portion 15: Lock groove portion 16: Second annular portion 50: Misconnection prevention device 51: Cylindrical housing 52: Blocking mechanism 53: Cylindrical main body portion 54: Base end side end face member (connection release member)
55: Front end side member 58: Biasing member 60: Incorrect connection prevention device 61: Cylindrical housing 62: Blocking mechanism 65: Connection release member 72: Elastic member (blocking mechanism)

Claims (11)

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 on 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. Closed in which the outflow of the fluid from the joint tip on the non-connector side is stopped in the closed posture in which the movement ball is restricted in the radial direction by the first restriction surface and the operating member moves to the non-connector side. And an open state in which the outflow of fluid from the joint tip is allowed in an open posture in which the locking ball is restricted from moving in the radial direction by the second restriction surface and the operating member is moved to the connector side. A joint member that can be switched between,
A plug main body and a connection portion to which the joint member is connected are provided, and an internal fluid flow path extending from the axial front end to the base end is provided, and a first annular shape is formed from the base end of the connection portion toward the front end side. 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,
In the configuration that can be mounted on the outer diameter side across the first annular portion and the second annular portion of the plug, and allows the joint member to enter from the distal end side to the proximal end side in the axial direction,
In the approach of the hose from the distal end side toward the proximal end side, a cylindrical housing, and a blocking mechanism that prevents the hose entry,
A connection for connecting the joint member to the plug in a configuration in which the blocking mechanism is retracted to the outer diameter side to allow the joint member to enter when the joint member enters from the distal end side toward the proximal end side. A misconnection prevention device in which the joint member reaches the plug in operation and allows connection between the two.   In the connected state in which the joint member and the plug are connected, the connection member includes a connection release member capable of releasing the connection by a movement operation in the axial direction, and the connection release member is moved by the movement operation in the axial direction. The erroneous connection preventing apparatus according to claim 1, wherein the connection between the two is released by pressing and moving the tip of the sleeve member.   In the connection operation for connecting the joint member and the plug, the connection release member is moved from the distal end side to the proximal end side, and the connection release member is in a connected state in which the locking ball is fitted in the lock groove portion. The erroneous connection preventing device according to claim 2, wherein the erroneous connection preventing device is positioned.   The connection release member is a base end side end face member provided on the base end side, and the connection between the two is released when the base end side end face member is moved to the front end side. The erroneous connection prevention device described.   The said connection cancellation | release member is a member provided with the protrusion operation part extended to the exterior from the inside of an apparatus, The connection of both is cancelled | released when a protrusion operation part is moved and operated to the front end side. Incorrect connection prevention device.   The erroneous connection preventing device according to any one of claims 1 to 5, wherein a plurality of the blocking mechanisms are provided in a circumferential direction of the shaft. The blocking mechanism has a base end side member having a swing fulcrum at the cylindrical housing portion on the proximal end side in the axial direction and a swing support point at the cylindrical housing portion on the distal end side, and is connected to the base end side member. A distal end side member that is swingably connected at a fulcrum; and a biasing member that maintains the proximal end member in a blocking posture in which the proximal end side member can prevent the hose from entering while being biased. Configured
The entry of the joint member allows the distal end side member to swing to the outer diameter side, swing the base end side member to the outer diameter side, and allow the joint member to enter. An erroneous connection prevention device according to claim 1.   In a state where the proximal end member is in a blocking posture to prevent the hose from entering, the proximal end member contacts the connecting portion of the plug, and further swinging from the blocking posture toward the inner diameter side is blocked. The erroneous connection preventing apparatus according to claim 7. The blocking mechanism is composed of an elastic member supported from the outer diameter side in the cylindrical housing,
The elastic member is provided with a joint member contact portion located on the distal end side and a hose contact portion located on the proximal end side,
In an erroneous entry state where the hose enters from the distal end side toward the proximal end side, the hose comes into contact with the hose contact portion to prevent entry of the hose,
In a normal approach state where the joint member enters from the distal end side toward the proximal end side, the joint member abuts on the joint member abutting portion to retract the hose abutting portion to the outer diameter side, and the joint member The erroneous connection preventing apparatus according to any one of claims 1 to 6, wherein an entry is allowed to a connection position connected to the plug.   The erroneous connection prevention device according to any one of claims 2 to 5, wherein the connection release member includes a connection release operation unit extending in an axial direction on an outer diameter side of the cylindrical housing.   The erroneous connection preventing apparatus according to claim 1, further comprising a sensor member that detects a connection state in which the joint member enters the apparatus and the joint member is connected to the plug.

Images