JP2021181815A - Hose connector, and plug member constituting hose connector - Google Patents

Abstract

To provide a hose connector configured so as not to expose a fixing part of a socket member and a plug member to the outside, and to be easily miniaturized.SOLUTION: A hose connector 1 is composed of a socket member 10 and a plug member 12. The plug member 12 has a plug main body portion 14, and a locking portion 18 extending from its outer surface 14c. The locking portion 18 is composed of an inner part 26, a folding part 28, and an outer part 30. The inner part 26 is positioned at an interval from an outer peripheral surface 20a of the plug main body portion 14 to a radial outer side, and the outer part 30 is positioned at an interval from the inner part 26 to the radial outer side. When the plug member 12 is inserted to an insertion passage 34 of the socket member 10, the locking portion 18 is deflected to a radial inner side by a slide inner peripheral surface 40 of the insertion passage 34, and elastically recovered in passing through the slide inner peripheral surface 40. By engagement of a rear end portion 32 of the locking portion 18 with a rear locking receiving surface 38, slipping-off of the plug member 12 from the socket member 10 is prevented.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hose connector composed of a socket member and a plug member, and a plug member constituting the hose connector.

Hose connectors may be used to connect the hose to the device easily and securely. For example, the hose connector shown in Patent Document 1 is composed of a socket-shaped fixing member and a plug-shaped joint member, and a hose is attached to a press-fitting portion provided at the tip of the joint member to insert the joint member into the fixing member. As a result, the joint member and the fixing member are connected in a state where the hose is sandwiched between the joint member and the fixing member. The joint member and the fixing member are connected by engaging the engaging claw portion protruding outward in the radial direction on the outer peripheral surface of the fixing member and the engaging spring portion of the joint member. In this hose connector, it is possible to easily connect and disconnect the joint member and the fixing member.

Japanese Unexamined Patent Publication No. 2000-199592

However, in the above-mentioned conventional hose connector, the engaging claw portion and the engaging spring portion for fixing the joint member and the fixing member are exposed to the outside in the connected state. Therefore, when another member collides with the portion, the connection may be accidentally released, or the engaging claw portion or the engaging spring portion may be damaged and proper fixing may not be possible. Further, the engaging spring portion has a shape that extends long in a plane in order to obtain a required displacement amount, which makes it difficult to reduce the size of the entire hose connector.

Therefore, the present invention provides a hose connector composed of a socket member and a plug member, in which the fixing portion between the socket member and the plug member is not exposed to the outside and the hose connector is structurally easy to miniaturize. The purpose.

That is, the present invention
A hose connector including a socket member and a plug member that is inserted and connected to the socket member.
The plug member
A plug body having a front end, a rear end, and a fluid passage extending from the front end to the rear end, and a hose holding portion formed at the front end by being press-fitted into a hose to hold the hose.
At the inner portion extending forward from the outer surface of the plug main body, the folded portion extending radially outward from the inner portion, and the rear end extending rearward from the folded portion. It has an outer portion to be terminated, the inner portion is located radially outward from the outer peripheral surface of the plug body, and the outer portion is spaced radially outward from the inner portion. And a locking part that is flexible in the radial direction,
Equipped with
The socket member has an insertion passage extending from the front end, the rear end, and the front end to the rear end to receive the plug member from the side of the rear end, and the insertion passage is the hose of the plug main body portion. A hose receiving surface that engages with the outer peripheral surface of the hose held by the holding portion and holds the hose between the hose holding portion, and a rear locking receiver facing forward at a position rearward from the hose receiving surface. It has a surface and a sliding inner peripheral surface provided at a position radially inside and behind the rear locking receiving surface.
When the plug member is inserted into the insertion passage of the socket member, the outer portion of the locking portion slides and engages with the sliding inner peripheral surface, and the locking portion flexes inward in the radial direction. When the rear end portion of the locking portion passes through the sliding inner peripheral surface, the locking portion is elastically restored outward in the radial direction, and the rear end portion is placed on the rear locking receiving surface of the plug main body portion. The plug member is connected to the socket member at a position facing each other in the longitudinal axis direction, and in the connected state, the rear end portion engages with the rear locking receiving surface so that the plug member can be attached to the socket member. Provided is a hose connector that is prevented from coming out backwards.

In the hose connector, in the connected state, the locked portion of the plug member engages with the rear locking receiving surface in the insertion passage of the socket member to maintain the connected state, and the connected state is maintained with the plug member. The locking portion and the rear locking receiving surface, which are the fixing points with the socket member, are not exposed to the outside. Therefore, there is no possibility that another member may collide with the locking portion and the connection may be unexpectedly released or the locking portion may be damaged. Further, since the locking portion has a folded shape, it is possible to suppress the size particularly in the longitudinal axis direction while ensuring the amount of displacement required at the rear end portion. This makes it possible to make the entire hose connector small.

At least a part of the inner portion of the locking portion is located radially inside the hose receiving surface, and the folded portion is folded radially outward at a position behind the hose receiving surface. can do.

With such a configuration, the locking portion can be arranged more inside without being affected by the size of the hose receiving surface, and the size of the plug member in the radial direction can be suppressed to a small size. This makes it possible to reduce the size of the entire hose connector.

The insertion passage has a front locking receiving surface facing rearward so as to face the folded portion of the locking portion in the longitudinal axis direction, and the plug member is pushed forward with respect to the socket member. At that time, the folded portion can be engaged with the front locking receiving surface to limit the forward displacement of the plug member with respect to the socket member.

The insertion passage has a circumferential locking receiving surface facing circumferentially at a position between the hose receiving surface and the rear locking receiving surface in the longitudinal axis direction, and the side surface of the locking portion is By engaging with the circumferential locking receiving surface in the circumferential direction, the rotation of the plug member with respect to the socket member in the circumferential direction can be restricted.

The socket member has a tool insertion passage extending in the longitudinal axis direction from the front end to the rear locking receiving surface, and by inserting a tool into the tool insertion passage, the locking portion is flexed inward in the radial direction. The plug member can be removed from the socket member.

The insertion passage of the socket member has a locking groove extending forward from the rear end of the socket member, and the plug member has a diameter from the outer peripheral surface of the plug body portion at the rear end of the plug body portion. It has a locking projection that projects outward in the direction and extends forward, and when the plug member is inserted and connected to the socket member, the locking projection is located in the locking groove, and the locking projection is located. By engaging with the locking groove in the circumferential direction, it is possible to prevent the plug member from rotating in the circumferential direction with respect to the socket member.

The present invention further
A plug member that is inserted and connected to a tubular socket member to form a hose connector together with the socket member.
A plug body having a front end, a rear end, and a fluid passage extending from the front end to the rear end, and a hose holding portion formed at the front end by being press-fitted into a hose to hold the hose.
At the inner portion extending forward from the outer surface of the plug main body, the folded portion extending radially outward from the inner portion, and the rear end extending rearward from the folded portion. It has an outer portion to be terminated, the inner portion is located radially outward from the outer peripheral surface of the plug body, and the outer portion is spaced radially outward from the inner portion. And a locking part that is flexible in the radial direction,
Equipped with
When the plug member is inserted into the insertion passage of the socket member, the outer portion of the locking portion is slidably engaged with the sliding inner peripheral surface of the insertion passage, and the locking portion is radially inside. When the rear end of the locking portion passes through the sliding inner peripheral surface, the locking portion is elastically restored outward in the radial direction, and the rear end portion has a diameter from the sliding inner peripheral surface. The plug member is connected to the socket member at a position facing the locking receiving surface extending outward in the direction in the longitudinal axis direction of the plug main body, and the rear end portion is connected to the locking receiving surface in the connected state. Provided is a plug member whose engagement prevents the plug member from coming out of the socket member rearward.

At this time, the folded portion of the locking portion can be made to be folded outward in the radial direction at a position rearward from the hose holding portion.

With such a configuration, the locking portion can be arranged more inward without being affected by the radial size of the hose holding portion or the hose attached to the hose holding portion, and the plug member can be particularly provided. It is possible to reduce the size in the radial direction. This also makes it possible to reduce the size of the socket member to which the plug member is inserted and connected.

Hereinafter, embodiments of the hose connector according to the present invention will be described with reference to the accompanying drawings.

It is sectional drawing in the connected state of the hose connector which concerns on 1st Embodiment of this invention. It is a figure which shows the separated state of the hose connector of FIG. It is the first figure which shows the connection process of the hose connector of FIG. It is the 2nd figure which shows the connection process of the hose connector of FIG. It is a figure which shows the connection release operation using a special tool. It is sectional drawing in the connected state of the hose connector which concerns on 2nd Embodiment of this invention.

As shown in FIG. 1, the hose connector 1 according to the first embodiment of the present invention includes a socket member 10 and a plug member 12 inserted and connected to the socket member 10. A hose H is sandwiched and connected between the socket member 10 and the plug member 12.

The plug member 12 has a pair of locking portions 18 provided at positions facing each other in the radial direction of the outer surface 14c of the plug main body portion 14 and the plug main body portion 14 having a fluid passage 16 extending from the front end 14a to the rear end 14b. And. The plug main body portion 14 includes a front portion 20 having a small diameter and a rear portion 22 having a large diameter. At the front end 14a of the plug main body 14, a hose holding portion 24 having a diameter expanded from the outer peripheral surface 20a of the front portion 20 and having a zigzag vertical cross-sectional shape is formed. By press-fitting the hose holding portion 24 into the hose H, the hose H is held by the plug member 12. The locking portions 18 are an inner portion 26 extending from a position between the front portion 20 and the rear portion 22 on the outer surface 14c of the plug main body portion 14 toward the front (left side in the figure) and an inner portion, respectively. It is composed of a folded-back portion 28 extending radially outward from the plug main body portion 14 and an outer portion 30 extending rearward (to the right in the figure) from the folded-back portion 28 and terminating at the rear end portion 32. The folded-back portion 28 is folded back behind the hose holding portion 24, and the entire locking portion 18 is located behind the hose holding portion 24. The inner portion 26 is located radially outward from the outer peripheral surface 20a of the front portion 20 of the plug main body portion 14. Further, the outer portion 30 is located at a distance outward in the radial direction from the inner portion 26. The locking portion 18 has radial flexibility and is generally bent inward in the radial direction from the state shown in the figure.

The socket member 10 is a tubular member having an insertion passage 34 extending from the front end 10a to the rear end 10b. The insertion passage 34 has a hose receiving surface 36 that engages with the outer peripheral surface of the hose H held by the hose holding portion 24 of the plug main body 14, and a rear locking receiver provided at a position behind the hose receiving surface 36. It has a surface 38 and a sliding inner peripheral surface 40 provided at a position radially inside and behind the rear locking receiving surface 38. The hose receiving surface 36 is a tapered surface whose diameter is reduced toward the front, and the hose H is sandwiched between the hose holding portion 24 and the hose holding portion 24. The sliding inner peripheral surface 40 extends forward from the rear end 10b of the socket member 10 and holds the outer peripheral surface 22a of the rear portion 22 of the plug member 12 in the radial direction. The rear locking receiving surface 38 is formed so as to extend radially outward from the sliding inner peripheral surface 40 and face forward, and is in the direction of the rear end portion 32 of the locking portion 18 of the plug member 12 and the longitudinal axis L. It is in the opposite position. The insertion passage 34 is further formed with a front locking receiving surface 42 extending radially outward from the hose receiving surface 36 and facing rearward. The front locking receiving surface 42 is located at a position facing the folded portion 28 of the locking portion 18 of the plug member 12 in the direction of the longitudinal axis L.

Specifically, as shown in FIG. 2, the insertion passage 34 of the socket member 10 according to this embodiment has a small diameter portion 34a extending rearward from the front end 10a and defining the hose receiving surface 36, and the rear end 10b forward. The large-diameter portion 34b extending to the hose receiving surface 36 while forming the sliding inner peripheral surface 40 and the large-diameter portion 34b extending rearward from the front end 10a of the socket member 10 and communicating with the large-diameter portion 34b at the rear position of the hose receiving surface 36. It is composed of an axial hole 34c. A pair of axial holes 34c are provided at positions facing each other in the diametrical direction so as to correspond to the pair of locking portions 18. The rear locking receiving surface 38 is formed by the rear end surface of the axial hole 34c. Further, the front locking receiving surface 42 is formed by the front end surface of the large diameter portion 34b.

When connecting the hose H to the hose connector 1, as shown in FIG. 3, the hose H is inserted into the insertion passage 34 of the socket member 10 on the side of the front end 10a with the socket member 10 and the plug member 12 separated. And attach it to the hose holding portion 24 of the plug member 12. Next, the plug member 12 is inserted into the insertion passage 34 of the socket member 10 from the rear end 10b side. As shown in FIG. 4, when the plug member 12 is inserted into the insertion passage 34, the outer portion 30 of the locking portion 18 is slidably engaged with the sliding inner peripheral surface 40 of the insertion passage 34, and the locking portion 18 is engaged. Bends inward in the radial direction as a whole. At this time, a part of the locking portion 18 is located at the rear position of the hose holding portion 24 and radially inside the maximum outer diameter portion of the hose holding portion 24. When the rear end portion 32 of the locking portion 18 passes through the sliding inner peripheral surface 40, the locking portion 18 is elastically restored outward in the radial direction, and the hose connector 1 is in the connected state shown in FIG. In this connected state, as described above, the hose H is sandwiched between the hose holding portion 24 and the hose receiving surface 36, and is firmly held by the hose connector 1. Further, the rear end portion 32 of the elastically restored locking portion 18 is at a position facing the rear locking receiving surface 38 in the direction of the longitudinal axis L. As a result, when the plug member 12 is displaced rearward with respect to the socket member 10, the rear end portion 32 of the locking portion 18 engages with the rear locking receiving surface 38, and the plug member 12 is rearward from the socket member 10. It is prevented from exiting. When the plug member 12 is pushed forward with respect to the socket member 10, the hose holding portion 24 of the plug member 12 normally engages with the hose receiving surface 36 via the hose H, so that the plug member 12 is engaged with the socket member 10. It is prevented from being displaced forward with respect to. However, for example, when the wall thickness of the hose H is thin or when the hose H is made of a soft and easily crushable material, the plug member 12 is displaced further forward than the position shown in the drawing and the locking portion 18 is folded back. The portion engages with the front locking receiving surface 42 of the socket member 10 to limit the forward displacement of the plug member 12 with respect to the socket member 10.

The insertion passage 34 further has a circumferential locking receiving surface 44 extending forward from the rear locking receiving surface 38 and facing the circumferential direction. The circumferential locking receiving surface 44 is formed by the inner surface of the axial hole 34c of the insertion passage 34. By engaging the side surface of the outer portion 30 of the locking portion 18 in the circumferential direction with the circumferential locking receiving surface 44, the rotation of the plug member 12 with respect to the socket member 10 in the circumferential direction is also restricted. ing.

In the hose connector 1, the locking portion 18 of the plug member 12 is located in the insertion passage 34 in the connected state and is covered with the socket member 10 from the surroundings and is not exposed to the outside. Therefore, there is no possibility that the locking portion 18 is displaced or damaged due to collision with other members. Further, since the locking portion 18 has a shape folded back in the direction of the longitudinal axis L, the amount of displacement in the radial direction of the rear end portion 32 is large while suppressing the size in the direction of the longitudinal axis L. It becomes possible. Further, since the folded portion 28 of the locking portion 18 is formed so as to be bent radially outward at a position behind the hose holding portion 24 and the hose receiving surface 36, the folded portion 28 is formed in the radial direction of the locking portion 18. The position is not limited by the radial size of the hose holding portion 24 or the hose receiving surface 36. Unlike the present invention, when the locking portion has a shape extending straight in the direction of the longitudinal axis L and a locking claw outward in the radial direction is provided at the tip thereof, the amount of displacement in the radial direction at the tip thereof is provided. The shape must be longer in the direction of the longitudinal axis L than the locking portion 18 of the present invention. In that case, the hose holding portion 24 is arranged forward so as not to overlap the long locking portion, or the long locking portion is sufficiently spaced radially from the hose holding portion 24 to the outside of the hose holding portion 24. It should be placed more radially outward to pass through. In such a case, the plug member has a larger shape in the direction of the longitudinal axis L or in the radial direction. In the present invention, since the locking portion 18 has a folded shape as described above, the locking portion 18 is arranged more radially inward without locating the hose holding portion 24 forward and far. Can be done. This makes it possible to make the plug member 12 into a small shape in the direction of the longitudinal axis L and in the radial direction.

Since the locking portion 18 of the hose connector 1 is covered with the socket member 10 in the connected state, the operator cannot manually push the locking portion 18 inward in the radial direction. Further, since the rear locking receiving surface 38 extends in the direction perpendicular to the longitudinal axis L and the end surface of the rear end portion 32 of the locking portion 18 also extends in the right angle direction, the plug member 12 is displaced rearward. Even if the rear end portion 32 of the locking portion 18 is pressed against the rear locking receiving surface 38, the locking portion 18 does not bend inward in the radial direction. Therefore, once the hose connector 1 is in the connected state, it cannot be disconnected by normal operation, so that the connection is not accidentally disconnected. However, there are cases where it is desired to disconnect the plug member 12 and the socket member 10 at the time of maintenance or replacement of the hose. In that case, as shown in FIG. 5, a special tool elongated in the tool insertion passage 46 formed by the axial hole 34c extending in the direction of the longitudinal axis L from the front end 10a of the socket member 10 to the rear locking receiving surface 38. Insert 48. Then, the special tool 48 hits the outer portion 30 of the locking portion 18, and the locking portion 18 can be bent inward in the radial direction. By bending the locking portion 18 in this way, the rear end portion 32 of the locking portion 18 is in a position where it does not engage with the rear locking receiving surface 38, and the plug member 12 can be removed from the socket member 10. Become.

In the hose connector 101 according to the second embodiment of the present invention, as shown in FIG. 6, a locking groove 150 extending forward from the rear end 110b is formed in the insertion passage 134 of the socket member 110. Further, the plug member 112 has a locking projection 152 that protrudes radially outward from the outer peripheral surface 114c at the rear end 114b of the plug main body 114 and extends forward. By aligning the locking projection 152 and the locking groove 150 when the plug member 112 is inserted into the socket member 110, the rotational position of the plug member 112 and the socket member 110 can be aligned with an appropriate position. .. Further, in the connected state, the locking projection 152 engages with the locking groove 150 in the circumferential direction to prevent the plug member 112 from rotating with respect to the socket member 110. When the plug member 112 is displaced forward with respect to the socket member 110, the locking projection 152 engages with the front end surface 150a of the locking groove 150 to limit the forward displacement of the plug member 112. It is also. The rotation and forward displacement of the plug member 112 may be restricted by engaging the locking portion 118 with each portion of the insertion passage 134 as in the first embodiment, or the locking portion 118 may be restricted. It may be made by both the portion 118 and the locking projection 152.

1 Hose connector 10 Socket member 10a Front end 10b Rear end 12 Plug member 14 Plug body 14a Front end 14b Rear end 14c Outer surface 16 Fluid passage 18 Locking part 20 Front part 20a Outer surface 22 Rear part 22a Outer surface 24 Hose holding part 26 Inner part 28 Folded part 30 Outer part 32 Rear end part 34 Insertion passage 34a Small diameter part 34b Large diameter part 34c Axial direction hole 36 Hose receiving surface 38 Rear locking receiving surface 40 Sliding inner peripheral surface 42 Front locking receiving surface 44 circumference Directional locking receiving surface 46 Tool insertion passage 48 Dedicated tool 101 Hose connector 110 Socket member 110b Rear end 112 Plug member 114 Plug main body 114b Rear end 114c Outer peripheral surface 118 Locking part 134 Insertion passage 150 Locking groove 150a Front end surface 152 Stop protrusion H Hose L Longitudinal axis

Claims (8)

A hose connector including a socket member and a plug member that is inserted and connected to the socket member.
The plug member
A plug body having a front end, a rear end, and a fluid passage extending from the front end to the rear end, and a hose holding portion formed at the front end by being press-fitted into a hose to hold the hose.
At the inner portion extending forward from the outer surface of the plug main body, the folded portion extending radially outward from the inner portion, and the rear end extending rearward from the folded portion. It has an outer portion to be terminated, the inner portion is located radially outward from the outer peripheral surface of the plug body, and the outer portion is spaced radially outward from the inner portion. And a locking part that is flexible in the radial direction,
Equipped with
The socket member has an insertion passage extending from the front end, the rear end, and the front end to the rear end to receive the plug member from the side of the rear end, and the insertion passage is the hose of the plug main body portion. A hose receiving surface that engages with the outer peripheral surface of the hose held by the holding portion and holds the hose between the hose holding portion, and a rear locking receiver facing forward at a position rearward from the hose receiving surface. It has a surface and a sliding inner peripheral surface provided at a position radially inside and behind the rear locking receiving surface.
When the plug member is inserted into the insertion passage of the socket member, the outer portion of the locking portion slides and engages with the sliding inner peripheral surface, and the locking portion flexes inward in the radial direction. When the rear end portion of the locking portion passes through the sliding inner peripheral surface, the locking portion is elastically restored outward in the radial direction, and the rear end portion is placed on the rear locking receiving surface of the plug main body portion. The plug member is connected to the socket member at a position facing each other in the longitudinal axis direction, and in the connected state, the rear end portion engages with the rear locking receiving surface so that the plug member can be attached to the socket member. A hose connector designed to prevent it from coming out backwards. At least a part of the inner portion of the locking portion is located radially inside the hose receiving surface, and the folded portion is folded radially outward at a position behind the hose receiving surface. The hose connector according to claim 1. The insertion passage has a front locking receiving surface facing rearward so as to face the folded portion of the locking portion in the longitudinal axis direction, and the plug member is pushed forward with respect to the socket member. The hose connector according to claim 1 or 2, wherein the folded portion engages with the front locking receiving surface to limit the forward displacement of the plug member with respect to the socket member. .. The insertion passage has a circumferential locking receiving surface facing circumferentially at a position between the hose receiving surface and the rear locking receiving surface in the longitudinal axis direction, and the side surface of the locking portion is According to any one of claims 1 to 3, the rotation of the plug member with respect to the socket member in the circumferential direction is restricted by engaging with the circumferential locking receiving surface in the circumferential direction. The listed hose connector. The socket member has a tool insertion passage extending in the longitudinal axis direction from the front end to the rear locking receiving surface, and by inserting a tool into the tool insertion passage, the locking portion is flexed inward in the radial direction. The hose connector according to any one of claims 1 to 4, wherein the plug member can be removed from the socket member. The insertion passage of the socket member has a locking groove extending forward from the rear end of the socket member, and the plug member has a diameter from the outer peripheral surface of the plug body portion at the rear end of the plug body portion. It has a locking projection that projects outward in the direction and extends forward, and when the plug member is inserted and connected to the socket member, the locking projection is located in the locking groove, and the locking projection is located. The invention according to any one of claims 1 to 5, wherein the plug member is prevented from rotating in the circumferential direction with respect to the socket member by engaging with the locking groove in the circumferential direction. Described hose connector. A plug member that is inserted and connected to a tubular socket member to form a hose connector together with the socket member.
A plug body having a front end, a rear end, and a fluid passage extending from the front end to the rear end, and a hose holding portion formed at the front end by being press-fitted into a hose to hold the hose.
At the inner portion extending forward from the outer surface of the plug main body, the folded portion extending radially outward from the inner portion, and the rear end extending rearward from the folded portion. It has an outer portion to be terminated, the inner portion is located radially outward from the outer peripheral surface of the plug body, and the outer portion is spaced radially outward from the inner portion. And a locking part that is flexible in the radial direction,
Equipped with
When the plug member is inserted into the insertion passage of the socket member, the outer portion of the locking portion is slidably engaged with the sliding inner peripheral surface of the insertion passage, and the locking portion is radially inside. When the rear end of the locking portion passes through the sliding inner peripheral surface, the locking portion is elastically restored outward in the radial direction, and the rear end portion has a diameter from the sliding inner peripheral surface. The plug member is connected to the socket member at a position facing the locking receiving surface extending outward in the direction in the longitudinal axis direction of the plug main body, and the rear end portion is connected to the locking receiving surface in the connected state. A plug member whose engagement prevents the plug member from coming out of the socket member rearward. The plug member according to claim 7, wherein the folded portion of the locking portion is bent radially outward at a position rearward from the hose holding portion.

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