WO2021230234A1

WO2021230234A1 - Connecting system

Info

Publication number: WO2021230234A1
Application number: PCT/JP2021/017852
Authority: WO
Inventors: 尚宏中田; 友彰中谷
Original assignee: 株式会社パックプラス
Priority date: 2020-05-12
Filing date: 2021-05-11
Publication date: 2021-11-18
Also published as: JP2021178651A; JP6925666B1

Abstract

The purpose of the present invention is to provide a connecting system with which it is possible to reliably and easily adjust the rigidity of a male member during insertion or pullout thereof. This connecting system comprises: a female member (1); a plug (2) that detachably engages the female member (1); and a male member (3) that is detachably inserted in the female member (1) and detachably engages the plug (2). The plug (2) has: an end wall part (20) and an annular wall part (21) that define a void (23) in which a head portion (32) of the male member (3) is to be accommodated; and an annular elastic hooking part (21) that is provided to a rear end of the annular wall part (21). The hooking part (22) has, in an outer circumferential surface (222) thereof, a thinning recess (225) formed in the circumferential direction, so as to easily move outward or inward in the radial direction.

Description

Consolidation system

The present invention relates to a connecting system consisting of a female member, a plug that is detachably fitted to the female member, and a male member that is detachably inserted into the female member and detachably engages with the plug.

Conventionally, in order to discharge fluid from a container containing various fluids such as chemicals, cosmetics, pharmaceuticals, detergents, foods, beverages, adhesives, paints, inks, etc. to another container or device, female members, male members and A coupling system consisting of a plug is known (see, for example, Patent Document 1).

This connecting system consists of a female member, a plug that is detachably fitted to the female member, and a male member that is detachably inserted into the female member and detachably engages with the plug.

The female member has a conduction path that extends axially from the insertion port for the male member to the opening for the plug, and has a female main body and a tubular seat formed around the opening of the conduction path. It is provided with a portion and a shoulder portion having an inner surface formed so as to gradually increase in diameter toward the insertion port in the conduction path between the female main body portion and the seat portion.

Further, the plug has a wall portion for partitioning an empty space for receiving the head of the male member, and an elastic annular hook portion provided at the rear end of the wall portion, and has a seat portion of the female member. It is designed to be detachably fitted to the door.

Further, the male member has a flow passage extending in the axial direction inside, and is used to receive the male main body, the head provided on the front side of the male main body, and the hooking portion of the plug. It has an annular recess provided between the portion and the head, and is detachably inserted into the conduction path of the female member, and the head is detachably engaged with the plug.

Explaining the specific operation in this connection system, the hooking portion of the plug is in the first position in the state where the plug is fitted to the female member and before the male member engages with the plug. In addition to being hooked on the shoulder portion of the female member, a space is provided between the female member and the shoulder portion. Further, in the state where the plug is fitted to the female member, the hooking portion of the plug is pressed against the head of the male member in the middle of engaging the male member with the plug. The space provided between the stop portion and the shoulder portion of the female member is moved radially outward from the first position to the second position. Further, when the male member is completely engaged with the plug while the plug is fitted to the female member, the hooking portion of the plug is released from the pressing by the head of the male member, whereby the male member is released. It moves radially inward from the second position to the third position so as to elastically bounce back toward the annular recess of the member. Further, while the male member is engaged with the plug, the hooking portion of the plug is pressed against the seat portion of the female member while the plug is being disengaged from the female member. It moves inward in the radial direction from the third position to the fourth position so as to fit into the annular recess. Further, when the male member is engaged with the plug and the plug is completely detached from the female member, the female member is elastically released from the pressing by the seat portion of the female member, thereby elastically from the annular recess of the male member. It moves outward in the radial direction from the fourth position to the fifth position so as to bounce back.

Special Table 2001-511416 Publication No.

However, when the male member is inserted into the conduction path of the female member and the head of the male member is engaged with the plug, and when the plug is disengaged from the female member with the male member engaged with the plug, it is large. It required force and sometimes felt a firm insertion feeling. Further, when the plug is fitted to the female member with the head of the male member engaged with the plug, and when the head of the male member is detached from the plug and the male member is pulled out from the conduction path of the female member. However, it also required a large amount of force and sometimes felt a firm pull-out feeling.

The present invention has been made in view of the above-mentioned problems, and it is possible to easily and surely adjust the hardness at the time of inserting or pulling out a male member, and thus to provide a connecting system of various hardnesses. The purpose is to provide a connection system capable of.

In the present invention, in order to achieve the above object, a female member, a plug that is detachably fitted to the female member, and a male member that is detachably inserted into the female member and detachably engages with the plug. It is composed of and. The female member has a conduction path that extends axially from the insertion port for the male member to the opening for the plug, and is formed around the female body portion and the opening of the conduction path. It includes a seat portion and a shoulder portion having an inner surface formed so as to gradually increase in diameter toward the insertion port in the conduction path between the female main body portion and the seat portion. The plug has a wall portion for partitioning a vacant space for receiving the head of the male member, and an elastic annular hook portion provided at the rear end of the wall portion, and the female member has. It is made to be detachably fitted to the seat. The male member has a flow passage extending in the axial direction inside, and in order to receive the male main body portion, the head provided on the front side of the male main body portion, and the hooking portion of the plug. It has an annular recess provided between the male main body and the head, and is detachably inserted into the conduction path of the female member, and the head is detachably engaged with the plug. NS. The hooking portion of the plug is attached to the shoulder portion of the female member at a first position in a state where the plug is fitted to the female member and before the male member engages with the plug. At the stage where the male member is engaged with the plug while the female member is hooked and a space is provided between the female member and the shoulder portion and the plug is fitted to the female member. By being pressed against the head of the male member, the space provided between the hook portion and the shoulder portion of the female member is moved radially outward from the first position to the second position. Then, in a state where the plug is fitted to the female member, when the male member is completely engaged with the plug, the male member is released from the pressing by the head of the male member, whereby the male member of the male member is released. The plug moves inward in the radial direction from the second position to the third position so as to elastically bounce back toward the annular recess, and the plug engages with the female member. By being pressed against the seat of the female member in the middle of detaching from the female member, the female member moves radially inward from the third position to the fourth position so as to fit into the annular recess of the male member. When the male member is engaged with the plug and the plug is completely detached from the female member, the female member is released from the pressing by the seat portion, so that the annular recess of the male member is released. It moves radially outward from the fourth position to the fifth position so as to elastically bounce back from. The hooking portion of the plug is radially outwardly inclined to a shoulder outer surface inclined radially outward from the outer peripheral surface of the wall portion of the plug and diagonally rearward to be radially inward from the shoulder outer surface. An inner surface of the hook that is provided with an outer peripheral surface and is inclined diagonally rearward in the radial direction from the inner peripheral surface of the wall portion of the plug, and an inner surface that is inclined diagonally rearward in the radial direction from the inner surface of the hooking. A peripheral surface is provided, and a lightening recess is formed in the circumferential direction on the outer peripheral surface and / or the inner peripheral surface of the hooking portion, and the male member and / or the male member and the said with the insertion of the male member into the plug. When a pressing force is received from the female member, the connecting portion between the wall portion and the hooking portion is elastically bent so as to move radially outward or radially inward. The lightening recesses are in the range of 60 degrees to 240 degrees around the entire circumference of the plug in total, and within the range of 20% to 90% of the axial length of the outer peripheral surface of the hooking portion. It is formed. According to this, by selecting the size, shape, and range of the lightening recess, the hardness at the time of inserting the male member can be easily and surely adjusted.

Further, the present invention is composed of a female member, a plug that is detachably fitted to the female member, and a male member that is detachably inserted into the female member and detachably engages with the plug. The female member has a conduction path that extends axially from the insertion port for the male member to the opening for the plug, and is formed around the female body portion and the opening of the conduction path. It includes a seat portion and a shoulder portion having an inner surface formed so as to gradually increase in diameter toward the insertion port in the conduction path between the female main body portion and the seat portion. The plug has a wall portion for partitioning a vacant space for receiving the head of the male member, and an elastic annular hook portion provided at the rear end of the wall portion, and the female member has. It is made to be detachably fitted to the seat. The male member has a flow passage extending in the axial direction inside, and in order to receive the male main body portion, the head provided on the front side of the male main body portion, and the hooking portion of the plug. It has an annular recess provided between the male main body and the head, and is detachably inserted into the conduction path of the female member, and the head is detachably engaged with the plug. NS. The hooking portion of the plug is hooked on the head of the male member at a fifth position when the plug is completely detached from the female member while the male member is engaged with the plug. The male member is stopped, and the male member is pressed against the seat of the female member while the plug is being fitted to the female member while the male member is engaged with the plug. At the stage where the male member is engaged with the plug and the plug is completely fitted to the female member by moving inward in the radial direction from the fifth position to the fourth position so as to fit into the annular recess. By being released from the pressing of the seat portion of the female member, the female member moves radially outward from the fourth position to the third position so as to elastically bounce back from the annular recess of the male member. While the plug is fitted to the female member, the male member is pressed against the head of the male member while the male member is being detached from the plug, so that the hooking portion and the female member are pressed. The male member is completely removed from the plug while the space provided between the shoulder portion and the shoulder portion is moved radially outward from the third position to the second position and the plug is fitted to the female member. At the stage of detachment, the male member is released from the pressing force of the head, so that the male member elastically rebounds and moves inward in the radial direction from the second position to the first position. The hooking portion of the plug is radially outwardly inclined to a shoulder outer surface inclined radially outward from the outer peripheral surface of the wall portion of the plug and diagonally rearward to be radially inward from the shoulder outer surface. An inner surface of the hook that is provided with an outer peripheral surface and is inclined diagonally rearward in the radial direction from the inner peripheral surface of the wall portion of the plug, and an inner surface that is inclined diagonally rearward in the radial direction from the inner surface of the hooking. A peripheral surface is provided, and a lightening recess is formed in the circumferential direction on the outer peripheral surface and / or the inner peripheral surface of the hooking portion, and the male member and / or the male member and the said as the male member is pulled out from the plug. When a pressing force is received from the female member, the connecting portion between the wall portion and the hooking portion elastically bends to move radially outward or radially inward. The lightening recesses are in the range of 60 degrees to 240 degrees around the entire circumference of the plug in total, and within the range of 20% to 90% of the axial length of the outer peripheral surface of the hooking portion. It is formed. According to this, by selecting the size, shape, and range of the lightening recess, the hardness of the male member at the time of pulling out can be easily and surely adjusted.

Further, a plurality of the lightening recesses may be formed intermittently along the circumferential direction of the plug. According to this, the hardness at the time of inserting or pulling out the male member can be evenly adjusted over the entire circumference of the plug.

Further, the lightening recesses may be formed within a range of 60 degrees to 240 degrees around the entire circumference of the plug in total. According to this, the hardness at the time of inserting or pulling out the male member can be appropriately adjusted.

Further, the lightening recess may be formed within the range of 20% to 90% of the axial length of the outer peripheral surface of the hooking portion. According to this, the hardness at the time of inserting or pulling out the male member can be appropriately adjusted.

According to the present invention, according to this, by selecting the size, shape, and range of the lightening recess, the hardness at the time of inserting the male member can be easily and surely adjusted, and by extension, the applicable product. It is possible to provide a connection system of various hardness depending on the situation.

It is a partial vertical sectional view which shows the whole structure of the connection system which concerns on embodiment of this invention. It is a front view of the female member of FIG. It is an enlarged vertical sectional view of the plug and the female member of FIG. It is a side view of the plug of FIG. FIG. 6 is a cross-sectional view taken along the line VV of the plug of FIG. It is a vertical sectional view which shows the insertion or withdrawal process of a male member. It is a side view and the perspective view which shows the modification of the plug of the coupling system.

Next, an embodiment of the connection system according to the present invention will be described with reference to FIGS. 1 to 6. In the present embodiment, the upper part of FIG. 1 will be described as the front side, and the lower side will be described as the rear side.

As shown in FIG. 1, the connection system has a female member 1, a plug 2 that is detachably fitted to the female member 1, and is detachably inserted into and detachably engaged with the female member 1. The male member 3 is provided. The female member 1 and the plug 2 are generally manufactured from a single plastic member by injection molding or the like. Further, the male member 3 is generally manufactured of a plastic member by injection molding or the like, but may be manufactured of another material such as a metal member.

As shown in FIGS. 1 and 2, the female member 1 has a conduction path 10 that penetrates the inside in the axial direction, and is provided with a female main body portion 11 extending in the axial direction and a front side of the female main body portion 11. It is composed of an annular seat portion 12 and a shoulder portion 13 provided between the main body portion and the seat portion 12. The female member 1 is welded or adhered to a flexible plastic packaging bag or the like, or is attached to a container or a holder.

The conduction path 10 axially penetrates the inside of the female member 1 from the insertion port 101 provided at the rear end of the female member 1 to the opening 102 provided at the front end of the female member 1. , The diameter is gradually reduced according to the inner diameters of the female body portion 11, the shoulder portion 13, and the seat portion 12.

The female body portion 11 is formed in a cylindrical shape extending linearly in the axial direction, and has an inner diameter into which the male member 3 can be inserted. The female main body 11 is formed with two annular ribs 111 at the rear portion, and a jig can be hung between the annular ribs 111 at the time of fluid filling.

As shown in FIG. 3, the seat portion 12 is an annular wall member provided around the opening 102 of the female member 1, and has a sealing surface 121 inside for the plug 2 to be closely fitted. Have in. The seat portion 12 is formed to have an inner diameter into which a male member 3 (first male main body portion 311), which will be described later, can be inserted.

The shoulder portion 13 has an inner surface formed in a tapered shape as a whole. Specifically, the shoulder portion 13 extends from the rear end of the sealing surface 121 of the seat portion 12 diagonally outward in the radial direction, and has a shoulder inner surface 131 connected to the front end of the inner peripheral surface of the female main body portion 11. A predetermined space 132 is provided inside the inner surface 131 of the shoulder in the radial direction.

As shown in FIGS. 3 to 5, the plug 2 has an umbrella-shaped thick end wall portion 20, a thin annular wall portion 21 connected to the rear end of the end wall portion 20, and an annular shape. It has a hooking portion 22 connected to the rear end of the wall portion 21, and forms an empty space 23 surrounded by the end wall portion 20 and the annular wall portion 21. The vacant space 23 is opened to the rear side and receives the head 32 of the male member 3 described later.

The end wall portion 20 includes a flat first engaging inner surface 201 formed at the front end and a second engaging inner surface 202 extending diagonally outward and diagonally rearward from the first engaging inner surface 201. have.

The annular wall portion 21 is a third engaging inner surface extending diagonally outward and diagonally rearward from the second engaging inner surface 202 of the end wall portion 20 at a steeper inclination angle than the second engaging inner surface 202. Has 213.

Further, the annular wall portion 21 is formed with a stop surface 211 extending radially outward on the front side of the outer peripheral surface. Therefore, when the plug 2 is fitted to the female member 1, the stop surface 211 of the end wall portion 20 of the plug 2 comes into contact with the end surface 122 of the seat portion 12 of the female member 1 with respect to the female member 1 of the plug 2. It is supposed to stop the fitting.

Further, the annular wall portion 21 is formed with a sealing rim 212 that rises radially outward in the intermediate portion of the outer peripheral surface. Therefore, when the plug 2 is fitted to the female member 1, the sealing rim 212 of the annular wall portion 21 of the plug 2 is pressed against the sealing surface 121 of the seat portion 12 of the female member 1 and the female member of the plug 2 is pressed. The fitting with respect to 1 is made strong with a force exceeding a certain level.

The hooking portion 22 is formed over the entire circumference of the plug 2, and as will be described later, the diameter is expanded or reduced radially as a whole by the action of the pressing force from the male member 3 or the female member 1. .. Specifically, when the hooking portion 22 receives a pressing force from the male member 3 or the female member 1 as the male member 3 is inserted or pulled out from the plug 2, the annular wall portion 21 and the hooking portion 22 The connecting portion elastically bends to move radially outward or radially inward.

Further, the hooking portion 22 is formed in a shape bulging radially outward and radially inward from the rear end of the annular wall portion 21.

Specifically, the hooking portion 22 has a shoulder outer surface 221 extending diagonally rearward from the outer peripheral surface of the annular wall portion 21 on the radial outer side, and an outer peripheral surface 222 extending rearward from the shoulder outer surface 221. have. The shoulder outer surface 221 is configured to come into contact with the shoulder inner surface 131 of the female member 1 when the plug 2 is fitted to the female member 1, as will be described later.

Further, the hooking portion 22 has a hooking inner surface 223 extending diagonally inward from the inner peripheral surface of the annular wall portion 21 on the inner side in the radial direction and an inner surface extending diagonally rearward on the outer side in the radial direction from the hooking inner surface 223. It has a peripheral surface 224. As will be described later, the hooking inner surface 223 is in contact with the hooking outer surface 331 of the male member 3 which will be described later when the male member 3 engages with the plug 2.

Then, in the present embodiment, as shown in FIGS. 3 to 5, the hooking portion 22 is formed with two lightening recesses 225 on the outer peripheral surface 222. The lightening recess 225 has a horizontally long rectangular shape extending in the circumferential direction with a width in the range of an angle of 90 degrees out of the entire circumference of the plug 2, and is a longitudinal section extending in the axial direction with a substantially entire length of the outer peripheral surface 222. It has an inverted L-shape and is formed in a lightened state, and is arranged in a facing state on the right side surface and the left side surface when viewed from the front of the plug 2. Therefore, as will be described later, with the insertion or withdrawal of the male member 3 in this connection system, the hooking portion 22 tends to move in the radial inside or the radial outside of the plug 2.

As shown in FIG. 1, the male member 3 has a flow passage 30 extending in the axial direction for fluid to flow inside, and is located in a cylindrical male main body 31 and on the front side of the male main body 31. It is composed of a head 32 provided and an annular recess 33 provided between the male body 31 and the head 32.

The male main body portion 31 has a first male main body portion 311 provided on the front side, a tapered portion 312 connected to the first male main body portion 311 and a second tapered portion 312 connected to the tapered portion 312. It is composed of a male main body portion 313 and a connection portion 314 connected to the second male main body portion 313.

The first male main body portion 311 is formed with a distribution port 311a communicating with the flow passage 30, and as shown in FIG. 6E, a state in which the head portion 32 of the male member 3 is engaged with the plug 2. When the plug 2 is detached from the seat portion 22 of the female member 1, the fluid flows through the flow port 311a.

The tapered portion 312 is formed in a shape extending diagonally outward from the rear end of the first male main body portion 311 diagonally rearward, and as shown in FIG. 6 (e), the head portion 32 of the male member 3 is formed. When the plug 2 is disengaged from the seat portion 12 of the female member 1 in a state of being engaged with the plug 2, it abuts on the shoulder portion 13 of the female member 1 to prevent further insertion of the male member 3.

The second male main body portion 313 is provided with a ring portion 313a in a portion connected to the tapered portion 312, and as shown in FIGS. 6 (d) and 6 (e), the ring portion 313a is the inner surface of the female member 1. To maintain close contact by pressing.

The connection portion 314 is provided with an annular flange 314a in a portion connected to the second male main body portion 313, and is connected to a hose or the like (not shown) from the rear end to the annular flange 314a.

As shown in FIG. 3, the head portion 32 is formed in a substantially truncated cone shape as a whole, and has a flat first engaging outer surface 321 formed at the front end and a radial direction from the first engaging outer surface 321. A second engagement outer surface 322 extending diagonally rearward on the outside and a third engagement extending diagonally outward diagonally rearward from the second engagement outer surface 322 to a steeper angle than the second engagement outer surface 322. It has an outer surface 323. The first engaging outer surface 321 and the second engaging outer surface 322 and the third engaging outer surface 323 are the end wall portion 20 and the annular wall portion of the plug 2 when the male member 3 engages with the plug 2. 21 abuts on the first engaging inner surface 201, the second engaging inner surface 202 and the third engaging inner surface 213.

Further, the diameter of the first engaging outer surface 321 of the head 32 is smaller than the minimum diameter at the first position of the hooking portion 22 (see FIG. 6A), and the second engagement of the head 32. Since the inclination angle of the outer surface 322 is larger than the inclination angle of the inner peripheral surface 224 of the hooking portion 22, the head portion 32 can be easily engaged while entering the space 23 of the plug 2.

The annular recess 33 has a hooking outer surface 331 extending diagonally inward and diagonally rearward from the third engaging outer surface 323 of the head 32, a bottom surface 332 extending axially rearward from the hooking outer surface 331, and the bottom surface 332. It has an inclined surface 333 extending diagonally rearward from the outside in the radial direction. When the male member 3 engages with the plug 2, the annular recess 33 composed of each of these surfaces receives the hooking portion 22 of the plug 2 in a state of being movable in the radial direction.

Next, the operation when inserting the male member 3 in this connection system will be described.

First, as shown in FIG. 6A, in a state where the plug 2 is fitted to the seat portion 12 of the female member 1, before the head 32 of the male member 3 engages with the plug 2, the plug 2 is used. The stop surface 211 of the end wall portion 20 of the female member 1 abuts on the end surface 122 of the seat portion 12 of the female member 1, and the sealing rim 212 of the annular wall portion 21 of the plug 2 is the sealing surface 121 of the seat portion 12 of the female member 1. Is pressed against. Then, the hooking portion 22 of the plug 2 is hooked on the shoulder portion 13 of the female member 1 at the first position. Specifically, the shoulder outer surface 221 of the hooking portion 22 of the plug 2 abuts on the shoulder inner surface 131 of the shoulder portion 13 of the female member 1 and is predetermined between the hooking portion 22 and the shoulder portion 13 of the female member 1. Space 132 is provided.

Next, as shown in FIG. 6B, in a state where the plug 2 is fitted to the seat portion 12 of the female member 1, the head 32 of the male member 3 is in the middle of engaging with the plug 2. The hooking portion 22 of 2 is pressed against the head portion 32 of the male member 3 as the head portion 32 of the male member 3 enters the plug 2, so that the hooking portion 22 and the shoulder portion 13 of the female member 1 are pressed. The space 132 provided between the two is moved radially outward from the first position to the second position without receiving a large resistance from the shoulder portion 13 of the female member 1.

At this time, as the hooking portion 22 of the plug 2 expands in diameter while moving radially outward from the first position, the plug 2 is hooked on the head portion 32 of the male member 3. A reactionary pressing force is generated from the stop portion 22, and the reactionary pressing force becomes the hardness at the time of the first insertion of the male member 3.

In the present embodiment, since the lightening recess 225 is formed on the outer peripheral surface 222 of the hooking portion 22, when the head portion 32 of the male member 3 engages with the plug 2 fitted to the female member 1, it is hooked. The stop portion 22 facilitates the radial outward movement of the space 132 between the female member 1 and the shoulder portion 13, and as a result, the hardness of the male member 3 at the time of initial insertion is reduced, and the head of the male member 3 is reduced. The portion 32 can be engaged with the plug 2 with an appropriate hardness.

Next, as shown in FIG. 6 (c), when the plug 2 is fitted to the seat portion 12 of the female member 1 and the head 32 of the male member 3 is completely engaged with the plug 2, the male member 3 is male. The first engaging outer surface 321 of the head portion 32 of the member 3, the second engaging outer surface 322, and the third engaging outer surface 323 are the first engaging of the end wall portion 20 and the annular wall portion 21 of the plug 2. It abuts on the inner surface 201, the second engaging inner surface 202, and the third engaging inner surface 213, respectively. Then, the hooking portion 22 of the plug 2 is released from the pressing by the head 32 of the male member 3 so as to elastically bounce back toward the annular recess 33 of the male member 3 from the second position. Move inward in the radial direction to the third position.

Next, as shown in FIG. 6D, in a state where the head 32 of the male member 3 is engaged with the plug 2, the plug 2 is in the middle of being detached from the seat portion 12 of the female member 1. By being pressed against the seat portion 12 of the female member 1, the hooking portion 22 of the male member 3 moves inward in the radial direction from the third position to the fourth position so as to fit into the annular recess 33 of the male member 3. ..

At this time, as the hooking portion 22 of the plug 2 shrinks in diameter while moving inward in the radial direction from the third position to the fourth position, the plug 2 is hooked on the head portion 32 of the male member 3. A reactionary pressing force is generated from the stop portion 22, and the reactionary pressing force becomes the hardness when the plug 2 is further inserted.

In the present embodiment, since the lightening recess 225 is formed on the outer peripheral surface 222 of the hooking portion 22, the plug 2 is the seat of the female member 1 with the head portion 32 of the male member 3 engaged with the plug 2. When detached from the portion 12, the hooking portion 22 tends to move inward in the radial direction toward the annular recess 33 of the male member 3, and as a result, the hardness of the male member 3 when further inserted is reduced, and the plug 2 Can be detached from the seat portion 12 of the female member 1 with an appropriate hardness.

Next, as shown in FIG. 6E, when the head 32 of the male member 3 is engaged with the plug 2 and the plug 2 is completely detached from the seat portion 12 of the female member 1, the plug is plugged. The hooking portion 22 of 2 is released from the pressing by the seat portion 12 of the female member 1 so as to elastically rebound from the annular recess 33 of the male member 3 so as to be elastically rebounded from the fourth position to the fifth position ( In this embodiment, it moves outward in the radial direction to the same position as the third position).

Next, the operation when pulling out the male member 3 in this connection system will be described.

As shown in FIG. 6 (e), when the head 32 of the male member 3 is engaged with the plug 2 and the plug 2 is completely detached from the seat portion 12 of the female member 1, the head 32 is the second. The engaging outer surface 321 of 1 and the second engaging outer surface 322 and the third engaging outer surface 323 are the first engaging inner surface 201 and the second engaging inner surface of the end wall portion 20 and the annular wall portion 21, respectively. It is in contact with 202 and the third engaging inner surface 213. The hooking portion 22 of the plug 2 is hooked to the head 32 at a fifth position by the hooking inner surface 223 of the hooking portion 22 of the plug 2 abutting on the hooking outer surface 331 of the head 32. ..

Next, as shown in FIG. 6D, in a state where the head 32 of the male member 3 is engaged with the plug 2, the plug 2 is in the middle of being fitted to the seat portion 12 of the female member 1. By being pressed against the seat portion 12 of the female member 1, the hooking portion 22 of 2 moves radially inward from the fifth position to the fourth position so as to fit into the annular recess 33 of the male member 3. do.

At this time, as the hooking portion 22 of the plug 2 shrinks in diameter while moving inward in the radial direction from the fifth position to the fourth position, the plug 2 is hooked on the head portion 32 of the male member 3. A reactionary pressing force is generated from the stop portion 22, and the reactionary pressing force becomes the hardness when the plug 2 is further pulled out.

Therefore, in the present embodiment, since the lightening recess 225 is formed on the outer peripheral surface 222 of the hooking portion 22, the plug 2 is the female member 1 in a state where the head 32 of the male member 3 is engaged with the plug 2. When fitted to the seat portion 12, the hooking portion 22 tends to move inward in the radial direction toward the annular recess 33 of the male member 3, and as a result, the hardness of the male member 3 at the time of initial pulling out is reduced. Then, the plug 2 can be fitted to the seat portion 12 of the female member 1 with an appropriate hardness.

Next, as shown in FIG. 6 (c), when the head 32 of the male member 3 is engaged with the plug 2 and the plug 2 is completely fitted to the seat portion 12 of the female member 1, the plug is plugged. The hooking portion 22 of 2 is released from the pressing by the head 32 of the male member 3 so as to elastically rebound from the annular recess 33 of the male member 3 from the fourth position to the third position. Move outward in the radial direction.

Next, as shown in FIG. 6B, in a state where the plug 2 is fitted to the seat portion 12 of the female member 1, and the head 32 of the male member 3 is in the process of being detached from the plug 2, The hooking portion 22 of the plug 2 is pressed against the head portion 32 of the male member 3 as the head portion 32 of the male member 3 retracts from the plug 2, so that the hooking portion 22 and the shoulder portion of the female member 1 are pressed. The space 132 provided between the 13 is moved radially outward from the third position to the second position without receiving a large resistance from the shoulder portion 13 of the female member 1.

At this time, as the hooking portion 22 of the plug 2 expands in diameter while moving radially outward from the third position, the plug 2 is hooked on the head portion 32 of the male member 3. A reactionary pressing force is generated from the stop portion 22, and the reactionary pressing force becomes the hardness at the time of the first pulling out of the male member 3.

In the present embodiment, since the lightening recess 225 is formed on the outer peripheral surface 222 of the hooking portion 22, when the male member 3 is detached from the plug 2 fitted to the female member 1, the hooking portion 22 is female. The space 132 between the shoulder portion 13 of the member 1 can be easily moved radially outward, and as a result, the hardness of the male member 3 when further pulled out is reduced, and the head portion 32 of the male member 3 is removed from the plug 2. It can be detached with moderate hardness.

Next, as shown in FIG. 6A, when the plug 2 is fitted to the seat portion 12 of the female member 1 and the head 32 of the male member 3 is completely detached from the plug 2. The hooking portion 22 of the plug 2 elastically rebounds and moves inward in the radial direction from the second position to the first position by being released from the pressing by the head 32 of the male member 3.

In the present embodiment, two lightening recesses 225 are formed on the outer peripheral surface 222 of the hooking portion 22, but one may be formed over the entire circumference, as shown in FIG. 7 (a). As shown, other numbers may be formed.

Further, although the lightening recess 225 is formed in a horizontally long rectangular shape, it may be formed in another shape such as a rhombus as shown in FIG. 7 (b).

Further, the lightening recess 225 is arranged so as to face the right side surface and the left side surface of the hooking portion 22, but as shown in FIG. 7 (c), the lightening recess 225 is arranged so as to face each other on the front surface and the back surface. It may be the arrangement of.

Further, the lightening recess 225 was formed over substantially the entire length of the outer peripheral surface 222 of the hooking portion 22 in the axial direction, but as shown in FIG. 7 (d), over other lengths. May be formed. However, in order to make the hardness of the male member 3 at the time of insertion an appropriate size, it is formed within the range of 20% to 90% of the axial length of the outer peripheral surface 222 of the hooking portion 22. Is preferable.

Further, although the lightening recess 225 is formed on the outer peripheral surface 222 of the hooking portion 22, it may be formed on the inner peripheral surface 224 of the hooking portion 22 as shown in FIG. 7 (e).

Further, the lightening recess 225 is formed in a horizontally long rectangular shape having a width in the range of 90 degrees around the entire circumference of the plug 2, but as shown in FIGS. 7A and 7B, it has a range of other angles. It may be formed in a width. However, in order to make the hardness of the male member 3 at the time of insertion an appropriate size, the lightening recesses 225 are formed in the range of 60 degrees to 240 degrees on the entire circumference of the plug 2 in total. It is preferable to have it. The

Further, the male member 3, the plug 2, and the female member 1 are not limited to the above-mentioned shape and structure, and may have other shapes and structures.

Further, although the female member 1 and the plug 2 are separate, the female member 1 and the plug 2 may be connected by a flexible connecting member.

Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to that of the illustrated embodiment. Various modifications and modifications can be made to the illustrated embodiments within the same range as the present invention or within the same range.

1 ... Female member 10 ... Conduction path 101 ... Insertion 102 ... Opening 11 ... Female body 111 ... Circular rib 12 ... Seat 121 ... Seal surface 122 ... End surface 13 ... Shoulder part 131 ... Shoulder inner surface 132 ... Space 2 ... Plug 20 ... end wall portion 201 ... first engagement inner surface 202 ... second engagement inner surface 21 ... annular wall portion 211 ... stop surface 212 ... sealing rim 213 ... third engagement inner surface 22 ... hooking portion 221 ... Shoulder outer surface 222 ... Outer surface 223 ... Hooking inner surface 224 ... Inner peripheral surface 225 ... Lightening recess 23 ... Vacancy 3 ... Male member 30 ... Flow passage 31 ... Male main body 311 ... First male main body 311a ... Distribution port 312 ... Tapered part 313 ... Second male body part 313a ... Ring part 314 ... Connection part 314a ... Circular flange 32 ... Head 321 ... First engaging outer surface 322 ... Second engaging outer surface 323 ... Third Engagement outer surface 33 ... annular recess 331 ... hooking outer surface 332 ... bottom surface 333 ... inclined surface

Claims

It is composed of a female member, a plug that is detachably fitted to the female member, and a male member that is detachably inserted into the female member and detachably engages with the plug.
The female member has a conduction path that extends axially from the insertion port for the male member to the opening for the plug, and is formed around the female body portion and the opening of the conduction path. It is provided with a seat portion and a shoulder portion having an inner surface formed so as to gradually increase in diameter toward the insertion port in the conduction path between the female main body portion and the seat portion.
The plug has a wall portion for partitioning a vacant space for receiving the head of the male member, and an elastic annular hook portion provided at the rear end of the wall portion, and the female member has. It is designed to be detachably fitted to the seat, and is fitted to the seat.
The male member has a flow passage extending in the axial direction inside, and in order to receive the male main body portion, the head provided on the front side of the male main body portion, and the hooking portion of the plug. It has an annular recess provided between the male main body and the head, and is detachably inserted into the conduction path of the female member, and the head is detachably engaged with the plug. ,
The hooking portion of the plug
In a state where the plug is fitted to the female member, before the male member engages with the plug, the female member is hooked to the shoulder portion of the female member at a first position and the female member is engaged. A space is provided between the shoulder and the shoulder,
While the plug is fitted to the female member, the male member is pressed against the head of the male member while the male member is engaged with the plug, so that the hook portion and the female member are pressed. The space provided between the shoulder portion and the shoulder portion is moved radially outward from the first position to the second position.
When the male member is completely engaged with the plug while the plug is fitted to the female member, the male member is released from the pressing by the head of the male member, whereby the annular shape of the male member is released. Moves radially inward from the second position to the third position so that it elastically bounces back toward the recess.
While the male member is engaged with the plug, the plug is pressed against the seat portion of the female member while the plug is being detached from the female member, so that the male member fits into the annular recess of the male member. Move inward in the radial direction from the 3rd position to the 4th position so that it can be pushed in.
When the male member is engaged with the plug and the plug is completely detached from the female member, the male member is released from the pressing by the seat portion of the female member, whereby the annular recess of the male member is released. It is a coupling system that elastically rebounds from the fourth position and moves radially outward from the fourth position to the fifth position.
The hooking portion of the plug
On the outside in the radial direction, a shoulder outer surface that is inclined diagonally rearward from the outer peripheral surface of the wall portion of the plug and an outer peripheral surface that is inclined diagonally rearward in the radial direction from the outer surface of the shoulder are provided.
On the inside in the radial direction, a hooking inner surface that is inclined diagonally rearward in the radial direction from the inner peripheral surface of the wall portion of the plug, and an inner peripheral surface that is inclined diagonally rearward in the radial direction from the inner surface of the hooking are provided.
A lightening recess is formed in the circumferential direction on the outer peripheral surface and / or the inner peripheral surface of the hooking portion, and as the male member is inserted into the plug, a pressing force is applied from the male member or the female member. Upon receiving, the connecting portion between the wall portion and the hooking portion is elastically bent so as to move radially outward or radially inward.
The lightening recesses are in the range of 60 degrees to 240 degrees around the entire circumference of the plug in total, and within the range of 20% to 90% of the axial length of the outer peripheral surface of the hooking portion. A coupling system characterized by being formed.
It is composed of a female member, a plug that is detachably fitted to the female member, and a male member that is detachably inserted into the female member and detachably engages with the plug.
The female member has a conduction path that extends axially from the insertion port for the male member to the opening for the plug, and is formed around the female body portion and the opening of the conduction path. It is provided with a seat portion and a shoulder portion having an inner surface formed so as to gradually increase in diameter toward the insertion port in the conduction path between the female main body portion and the seat portion.
The plug has a wall portion for partitioning a vacant space for receiving the head of the male member, and an elastic annular hook portion provided at the rear end of the wall portion, and the female member has. It is designed to be detachably fitted to the seat, and is fitted to the seat.
The male member has a flow passage extending in the axial direction inside, and in order to receive the male main body portion, the head provided on the front side of the male main body portion, and the hooking portion of the plug. It has an annular recess provided between the male main body and the head, and is detachably inserted into the conduction path of the female member, and the head is detachably engaged with the plug. ,
The hooking portion of the plug
In a state where the male member is engaged with the plug, when the plug is completely detached from the female member, the male member is hooked on the head of the male member at a fifth position.
While the male member is engaged with the plug, the plug is pressed against the seat portion of the female member while the plug is being fitted to the female member, thereby forming the annular recess of the male member. Move inward in the radial direction from the 5th position to the 4th position so as to fit in.
When the male member is engaged with the plug and the plug is completely fitted to the female member, the male member is released from the pressing by the seat portion of the female member, whereby the annular shape of the male member is released. It elastically bounces off the recess and moves radially outward from the fourth position to the third position.
While the plug is fitted to the female member, the male member is pressed against the head of the male member while the male member is being detached from the plug, so that the hooking portion and the female member are pressed. The space provided between the shoulder portion and the shoulder portion is moved radially outward from the third position to the second position.
When the male member is completely detached from the plug while the plug is fitted to the female member, the male member is released from the pressure of the head to elastically rebound. It is a coupling system that moves inward in the radial direction from the second position to the first position.
The hooking portion of the plug
On the outside in the radial direction, a shoulder outer surface that is inclined diagonally rearward from the outer peripheral surface of the wall portion of the plug and an outer peripheral surface that is inclined diagonally rearward in the radial direction from the outer surface of the shoulder are provided.
On the inside in the radial direction, a hooking inner surface that is inclined diagonally rearward in the radial direction from the inner peripheral surface of the wall portion of the plug, and an inner peripheral surface that is inclined diagonally rearward in the radial direction from the inner surface of the hooking are provided.
A lightening recess is formed in the circumferential direction on the outer peripheral surface and / or the inner peripheral surface of the hooking portion, and as the male member is pulled out from the plug, a pressing force is applied from the male member or the female member. Upon receiving, the connecting portion between the wall portion and the hooking portion is elastically bent so as to move radially outward or radially inward.
The lightening recesses are in the range of 60 degrees to 240 degrees around the entire circumference of the plug in total, and within the range of 20% to 90% of the axial length of the outer peripheral surface of the hooking portion. A coupling system characterized by being formed.
The connecting system according to claim 1 or 2, wherein a plurality of the lightening recesses are intermittently formed along the circumferential direction of the plug.