JP2021188734A - Inserting tool of insertion type coupling joint, and insertion type coupling joint - Google Patents

Abstract

To provide an inserting tool of an insertion type coupling joint capable of preventing release of a coupling state due to wrong operation even in a case where external force is applied to a push ring.SOLUTION: An inserting tool 10 of an insertion type coupling joint 1 has: a tip cylinder part 11 comprising a locking step part 11b on which a locking claw 24 can be engaged on a base end side; a base end side outer peripheral part 12 extending to the base end side of the locking step part 11b; and a push ring 15 mounted so as to be slidable in an axial direction on the base end side outer peripheral part 12. In a limited area in the axial direction between an inner surface part 15i facing the base end side outer peripheral part of the push ring and an outer surface part 12b of a base end side outer peripheral part facing the inner surface part, a support part 16a that can function as a fulcrum when the push ring is inclined with respect to the axial direction is provided, when the push ring is arranged in a non-operating area on the base end side on the base end side outer peripheral part.SELECTED DRAWING: Figure 2

Description

The present invention relates to a plug of a plug-in type joint and a plug-in type joint, and more particularly to a structure of a joint suitable as a fire-fighting joint.

Conventionally, various fire-fighting joints have been used as fire-fighting joints, such as fire-fighting hose joints for connecting fire-fighting hoses, or fire-fighting equipment joints for connecting equipment such as pipe spears. There is. As shown in FIG. 10, the plug-in type coupling joint has an inserter 10 and a receiver 20 configured to be detachably attached to each other, and the inserter 10 has a locking claw 24 that can freely appear and disappear inside. When inserted into the receiving port of the receiving tool 20 installed in the above, the locking step portion 11b at the base end of the tip tubular portion 11 of the insertion tool 10 is urged by the leaf spring 25 in the direction of projecting inward. By engaging with the claw 24 and preventing the locking step portion 11b from coming off, they are coupled to each other (see, for example, Patent Document 1 below). In this coupled state, by pushing the push ring 14 movably mounted on the outer periphery of the insertion tool 10 toward the receiver 20, the tip of the push ring 14 becomes the curved driven surface 24a of the locking claw 24. In order to abut and retract the locking claw 24 to the outer peripheral side of the receiving tool 20 against the leaf spring 25, the engaging claw 24 and the locking step portion 11b are disengaged, so that the engaging tool 10 and the receiving tool 10 are received. The combined state of the tool 20 is released.

By the way, the push ring 14 includes a flange portion 14a that extends toward the outer peripheral side in a flange shape, and a tubular portion 14b that extends from the flange portion 14a to the side of the receiver 20. The flange portion 14a is a portion for a worker to hook a finger when pushing the push ring 14 toward the receiver 20, and the tip of the tubular portion 14b has a locking claw 24 on the outer peripheral side as described above. It is a part for pushing and retracting. However, when the above-mentioned plug-in joint is used as a connection point between fire hoses, when the plug-in joint comes into contact with the ground, floor, stairs, etc. during firefighting activities, the collar When the 14a receives an external force in the axial direction, the push ring 14 malfunctions, and there is a problem that the insert 10 and the receiver 20 of the plug-in type joint may come off.

Therefore, conventionally, as shown in the following Patent Documents 2 and 3, a C-shaped member (disengagement prevention tool 20, lock member 20) is mounted between the push ring 14 (flange portion 14a) and the receiver 20. Alternatively, as shown in Patent Documents 4 and 5, the protective member (band) 27 of the receiver 20 is configured so as to be partially arranged between the flange portion 14a of the push ring 14 and the tightening ring 23. This prevents the push ring 14 from moving toward the receiver 20.

Japanese Unexamined Patent Publication No. 2003-185079 Japanese Unexamined Patent Publication No. 2000-329280 Japanese Unexamined Patent Publication No. 2004-101860 Japanese Unexamined Patent Publication No. 2017-213065 Japanese Unexamined Patent Publication No. 2018-031464.

However, in the method of attaching / detaching a member that hinders the operation of the push ring 14 as in Patent Documents 2 and 3, the above-mentioned member is attached / detached at the time of joining and releasing the insertion tool and the receiving tool of the plug-in type joint. It is complicated because it is necessary to do so, and in an emergency, the member may be forgotten to be attached, or the member may be lost. On the other hand, in the method using the protective member 27 having a shape that hinders the operation of the push ring 14 as in Patent Documents 4 and 5, the operation for releasing the coupled state becomes complicated and the durability of the protective member 27 decreases. However, there are problems such as an increase in manufacturing cost due to manufacturing a protective member having a special shape.

Therefore, the present invention solves the above-mentioned problems, and an object of the present invention is a structure of a plug-in type joint that can prevent the coupling state from being released due to a malfunction even when an external force is applied to the push ring, particularly a novel insert. To provide the structure.

In order to solve the above problems, the insertion tool for the plug-in type joint of the present invention is connected by the locking claw of the receiving tool in a state of being inserted into the receiving tool, and the engaging claw is retracted by the push ring. A tip cylinder portion having a locking step portion on which the locking claw can be engaged, and a locking step portion, which is a plug of a plug-in type joint joint whose coupling state is released. It has an outer peripheral portion on the proximal end side extending to the proximal end side in the axial direction, and the push ring slidably mounted in the axial direction on the outer peripheral portion on the proximal end side, and the outer peripheral portion on the proximal end side of the push ring. In a limited area in the axial direction between the inner surface portion facing the portion and the outer surface portion of the proximal end side outer peripheral portion facing the inner surface portion, the push ring is placed on the proximal end on the proximal end side outer peripheral portion. A support portion that can function as a fulcrum when the push ring is tilted with respect to the axial direction when arranged in the non-operating area on the side is provided. Here, it is preferable that the support portion is formed in a convex shape protruding toward the other on the surface of at least one of the inner surface portion and the outer surface portion.

According to the present invention, a limited area in the axial direction between the inner surface portion of the push ring facing the outer peripheral portion on the proximal end side of the insert and the outer surface portion of the outer peripheral portion on the proximal end side facing the inner surface portion. Is provided with a support portion that can function as a fulcrum when the push ring is inclined with respect to the axial direction when the push ring is arranged in the non-actuating area on the base end side on the outer peripheral portion on the base end side. .. As a result, when an external force is applied to the push ring, the push ring tilts on the outer peripheral portion on the proximal end side with the support portion as a fulcrum, so that the tilted posture of the push ring can be stably maintained. Since the contact point between the outer peripheral portion on the base end side and the push ring increases and the sliding resistance toward the tip side in the axial direction also increases, the external force does not become the driving force for the movement of the push ring toward the tip side in the axial direction. It is easily converted into a moment of force with respect to the outer peripheral portion on the base end side of the tool. Therefore, even if an external force is applied, the stable tilting posture of the push ring causes a locking action against the movement in the axial direction, so that the push ring is less likely to malfunction due to the external force. It is possible to prevent the release. Further, as compared with the case where the support portion is not provided, the backlash in the radial direction between the outer peripheral portion on the proximal end side and the push ring can be reduced by the amount of the support portion, so that the push ring when the joint is released from the coupling can be reduced. It is also possible to improve operability. In particular, by forming the support portion on the surface of at least one of the inner surface portion and the outer surface portion in a convex shape protruding toward the other, the push ring is set to an inclined posture with the more stable support portion as a fulcrum. Therefore, the locking action when receiving an external force can be obtained more reliably.

In the present invention, it is preferable that the support portion has a shape extending in the circumferential direction around the axis of the inner surface portion or the outer surface portion. According to this, by providing a shape in which the support portion extends in the circumferential direction around the axis, the support portion serves as a fulcrum regardless of any direction within the angular range of the circumferential direction in which the support portion extends. Therefore, the tilted posture of the push wheel can be realized. In this case, the support portion is preferably composed of a ring-shaped member arranged between the inner surface portion and the outer surface portion. In particular, the support portion is fitted into a groove extending in the circumferential direction formed on the surface of the inner surface portion or the outer surface portion, and a part of the cross section thereof protrudes from the inside of the groove to the outside. It is desirable to be composed of. At this time, it is more desirable that the ring-shaped member is detachably fitted to the groove.

In the present invention, it is preferable that the support portion is fixed in the axial direction with respect to the inner surface portion or the outer surface portion. According to this, since the support portion is fixed in the axial direction with respect to the inner surface portion or the outer surface portion, the push ring is in an inclined posture by the fixed fulcrum, so that a stable locking action can be obtained. In particular, the support portion is fitted into a groove extending in the circumferential direction formed on the surface of the inner surface portion or the outer surface portion, and a part of the cross section thereof protrudes from the inside of the groove to the outside. It is desirable to be composed of. At this time, it is more desirable that the fitting member is detachably fitted to the groove. Further, when the support portion is formed in a convex shape protruding toward the other on the surface of either the inner surface portion or the outer surface portion, the support portion is integrally formed with the base end side outer peripheral portion or the push ring. It may be configured.

In the present invention, it is preferable that the circumferential formation range of the support portion is set so that the push ring can be subjected to the fulcrum action by the support portion at any angle position on the entire circumference around the axis. .. By doing so, the effect can be obtained by the fulcrum action of the support portion regardless of the external force applied to any angle position. At this time, even if the support portion is not continuously formed over the entire circumference around the axis, it may be possible to obtain the same effect as when the support portion is formed over substantially the entire circumference. For example, the support portion may be composed of a plurality of portions intermittently formed with a slight missing portion in between along the circumferential direction. Further, when the support portion is composed of the link-shaped member, the ring-shaped member may be formed of a ring-shaped member having a slightly missing region, for example, a C ring.

In the present invention, the support portion is provided on the proximal end side and the distal end side in the axial direction within the axial range in which the inner surface portion and the outer surface portion face each other when the push ring is arranged in the non-operating region. It is preferable to arrange it in the area excluding the portion less than 1/4 of the above. According to this, when the push ring is arranged in the non-operating area on the base end side on the outer peripheral portion on the base end side, the base end in the axial direction within the axial range in which the inner surface portion and the outer surface portion face each other. By arranging the support portion in the region excluding the portion less than 1/4 of the side and the tip side, that is, in the region of 1/4 to 3/4 from the axial tip side in the above range, the support portion The tilt angle of the push ring when is used as the fulcrum of the push ring can be increased. Therefore, the locking action when an external force is applied is more likely to occur. In particular, the arrangement of the support portion in the axial direction is within the region excluding the portion less than 1/3 of the proximal end side and the distal end side in the above range, that is, 1/3 to 1/3 from the axial end side in the above range. It is more desirable to be within 2/3 of the area.

In the present invention, the support portion is within the region on the proximal end side of half of the axial range in which the inner surface portion and the outer surface portion face each other when the push ring is arranged in the non-operating region. It is preferable to be arranged in. According to this, when an external force from the proximal end side to the distal end side is applied to the push ring, the support portion serving as a fulcrum is arranged in the region on the proximal end side in the above range. At an angle position where an external force is applied, the tip end side portion of the push ring tends to be in an inclined posture in which it abuts on the outer surface portion. Therefore, the push wheel tends to be in an inclined posture when it receives an external force in a direction that tends to cause a malfunction, and therefore, a locking action is also likely to occur.

In the present invention, it is preferable that the support portion has a chevron shape along the axial direction of the tip portion that abuts on the inner surface portion or the outer surface portion as the fulcrum. According to this, as compared with the case where the contour shape of the tip portion of the support portion along the axial direction is flattened, it is easier to make the push ring an inclined posture in the axial direction, so that the push ring when an external force is applied is applied. It becomes possible to more reliably generate the locking action of.

In each of the above inventions, the width of the support portion in the axial direction is preferably less than 1/3, preferably less than 1/4 of the range in the axial direction in which the inner surface portion and the outer surface portion face each other. Is desirable. In particular, it is more desirable that it is less than 1/5. The smaller the width is compared to the above range, the easier it is for the support portion to function as a fulcrum of the push ring, so that the locking action can be enhanced.

In each of the above inventions, the push ring extends from the flange-shaped flange portion (15a) protruding toward the outer peripheral side at the base end side or the intermediate portion in the axial direction and from the flange portion (15a) to the tip end side in the axial direction. It is preferable to have a tubular portion (15b). According to this, by providing a flange portion on the base end side or the intermediate portion, the push ring can be easily pushed toward the tip side by this flange portion, so that operability is improved and the flange portion is moved to the tip side. By providing the extending tubular portion, the locking claw can be reliably retracted.

Next, the plug-in type coupling joint of the present invention is urged in the protruding direction into one of the above-mentioned inserts, a socket configured to accept the tip cylinder portion, and the inside of the receptacle. A coupling state is formed by engaging with the locking step portion, and in the coupling state, the coupling state is released by retracting by the push ring inserted into the operating region on the distal end side on the outer peripheral portion on the proximal end side. It is a plug-in type coupling joint comprising a receiver having a locking claw configured as described above.

In this case, the tip end portion of the push ring in the non-operating region is configured to be able to come into contact with the tip inner edge portion of the receiving port of the receiving tool by the inclined posture of the pushing ring with respect to the peripheral portion on the base end side. Is preferable. According to this, the tip end portion of the push ring abuts on the inner edge portion of the tip end of the receiving port in front of the locking claw, so that further inclination of the push ring is restricted. Due to the contact with the inside of the receiving port, the action of the push ring on the locking claw is more reliably avoided, and the tilted posture of the push ring that receives the external force is also fixed, so that the malfunction of the push ring is further ensured. Can be prevented. Here, the tip inner edge portion is a first inner edge portion (for example, an inner edge 23a described later) arranged on the tip end side of the socket and a second inner edge portion arranged on the proximal end side of the first inner edge portion. It has an inner edge portion (for example, an inner edge 26a described later), the inner dimension of the second inner edge portion is smaller than the inner dimension of the first inner edge portion, and the tip portion of the push ring has the inclined posture. Therefore, it is desirable that the first inner edge portion can be brought into contact with the first inner edge portion. When the push ring is in an inclined posture, the tip of the push ring is arranged on the outer peripheral side of the inner dimension of the second inner edge even if the tip does not abut on the first inner edge. If it is configured to be closer to the first inner edge, the second inner edge having a smaller inner dimension stands on the tip side in the axial direction than the tip of the push ring, so that the push ring is at the tip in the axial direction. If the tip portion moves to the side and abuts on the second inner edge portion, further sliding of the push ring can be suppressed.

According to the present invention, by making the support portion function as a fulcrum between the inner surface portion of the push ring and the outer surface portion of the outer peripheral portion on the proximal end side, the inclined posture of the push ring in the non-operating region is stabilized and the proximal end is stabilized. Since the contact point between the outer peripheral portion of the side and the push ring increases and the sliding resistance toward the tip side in the axial direction also increases, it is difficult for the push ring to move to the operating range even if an external force is applied due to the locking action due to the tilted posture of the push ring. can do. Therefore, it is possible to suppress the malfunction of the push ring due to an external force in the joined state of the plug-in type joint.

It is a vertical cross-sectional view which shows the state which the insert and the receiver are connected in 1st Embodiment of the plug-in type joint which concerns on this invention. In the first embodiment, it is an enlarged partial cross-sectional view which shows the part of the connection part centering on the push ring of a plug and a receiving part in an enlarged manner. In the first embodiment, it is a vertical sectional view showing a state when an external force F is applied to a push ring. In the first embodiment, it is an enlarged partial cross-sectional view which shows a part of the connection part centering on the push ring of a plug and a receiving part when an external force F is applied to a push ring. In the first embodiment, it is an enlarged partial cross-sectional view which shows the other part of the connection part centering on the push ring of a plug and a receiving part when an external force F is applied to a push ring. It is a vertical cross-sectional view which shows the state which the insert and the receiver are connected in the 2nd Embodiment of the plug-in type joint which concerns on this invention. In the second embodiment, it is an enlarged partial cross-sectional view which shows a part of the connection part centering on the push ring of a plug and a receiving part. In the second embodiment, it is a vertical sectional view showing a state when an external force F is applied to a push ring. In the second embodiment, it is an enlarged partial cross-sectional view which shows a part of the connection part centering on the push ring of a plug and a receiving part when an external force F is applied to a push ring. It is a vertical sectional view which shows the structure of the plug-in type joint for the conventional firefighting.

Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, the plug-in type coupling joint 1 of the first embodiment according to the present invention will be described with reference to FIGS. 1 and 2. Here, FIG. 1 shows that the insertion tool 10 of the fire-fighting joint 1 is inserted into the receiving port 20a of the receiving tool 20, and the locking claw 24 is completely locked and coupled to the locking step portion 11b of the tip cylinder portion 11. It is a vertical sectional view which shows the state. Further, FIG. 2 is an enlarged cross-sectional view showing the push ring 15 and its periphery in the coupled state of the plug-in type coupling joint 1.

The plug-in type joint 1 includes a plug 10 and a receiver 20. The insertion tool 10 has a tip cylinder portion 11 provided with an insertion port 10a. The tip cylinder portion 11 is configured in a tubular shape (cylindrical shape in the illustrated example) having predetermined outer dimensions (outer diameter in the illustrated example, the same applies hereinafter), and is a cylinder from the tip outer edge 11p to the base end outer edge 11q in the axial direction. A planar surface (cylindrical surface in the illustrated example) outer peripheral surface 11a is provided. Further, at the axial base end of the tip cylinder portion 11, a locking step portion 11b facing the axial base end side (right side in the drawing) is provided. Due to the locking step portion 11b, the outer dimension of the insert main body in the outer peripheral portion (hereinafter referred to as the proximal end side outer peripheral portion) 12 on the proximal end side in the axial direction thereafter is smaller than the outer dimension of the tip cylinder portion 11. It has become. The length of the tip cylinder portion 11 in the axial direction and the outer dimensions of the tip cylinder portion 11 and the base end side outer peripheral portion 12 are JIS B9911-1968 (dimensions of the plug-in fitting for a fire hose, the same applies hereinafter). ), Each is specified. In addition, in this specification, "axis direction" means the direction along the axis 10x of the inserter 10 or the receiver 20.

Further, the insertion tool 10 is basically equipped with a push ring 15 having the same structure as the conventional push ring 14. The push ring 15 is also provided with a flange-shaped flange portion 15a provided on the base end side and a cylindrical tubular portion 15b provided on the tip end side, which is the same as the conventional example shown in FIG. .. The push ring 15 is slidably arranged in the axial direction on the peripheral portion 12 on the base end side. Further, the retaining ring 13 has a base end side regulation structure that determines a regulation position on the base end side in the axial direction of the push ring 15. In the illustrated state, the push ring 15 does not abut on the locking claw 24 and is arranged in a non-operating region where it does not operate. The non-actuating region of the push ring 15 is on the proximal side in the axial direction on the outer surface 12a of the peripheral portion 12 on the proximal end side, that is, in the axial direction from the operating position with respect to the locking claw 24 shown by the two-dot chain line shown in the figure. It is set on the base end side.

On the other hand, the receiving tool 20 includes a receiving port 20a, a receiving tool main body 22, a tightening ring 23, a locking claw 24, a leaf spring 25, a claw seat 26, a protective member 27, and a packing 28, which are the same as those of the conventional structure. A plurality of (three in the illustrated example) locking claws 24 are urged on the inner side (axial direction base end side, left side in the drawing) of the receiving port 20a in a direction in which the leaf spring 25 projects toward the inner peripheral side of the receiving port 20. It is installed in the installed state. On the axial end side (right side in the drawing) of the locking claw 24, there is an inner outer peripheral portion of a receiving port 20a that is configured to allow the tip of the tubular portion 15b of the push ring 15 to pass toward the driven surface 24a of the locking claw 24. do. Here, in the receiving tool 20, the tip inner edge portion 21 of the receiving port 20a on the axial end side of the locking claw 24 is the inner edge 23a of the tightening ring 23 and the inner edge of the claw seat 26 as shown in FIG. It is composed of 26a. In the case of the illustrated example, the inner edge 26a on the proximal end side (inner side, that is, the left side in the drawing) in the axial direction is the inner dimension (inner diameter in the drawing example) than the inner edge 23a on the tip side (outer side, that is, the right side in the drawing) in the axial direction. Is getting smaller.

In the conventional example shown in FIG. 10, since the inner surface portion of the push ring 14 is flat in the axial direction and the outer peripheral portion on the proximal end side is also flat in the axial direction, the outer dimension (outer diameter) of the outer peripheral portion on the proximal end side is pushed. The difference between the inner and outer dimensions of the inner dimension (inner diameter) of the ring 14 is also constant in the axial direction. At this time, the tiltable angle range of the push ring 14 is determined by the relationship between the above-mentioned internal / external dimensional difference and the length of the push ring 14 in the axial direction. The tiltable angle range at this time is usually extremely narrow. In order to widen the range, the difference between the inside and outside dimensions may be increased. However, if this is done, the overall backlash will be significantly increased, and the operability of the push ring 14 at the time of releasing the coupled state will be significantly deteriorated.

On the other hand, in the present embodiment, of the outer surface 12a of the outer peripheral portion 12 on the base end side of the insertion tool 10, the inner peripheral side of the flange portion 15a and the tubular portion 15b of the push ring 15 arranged in the non-operating region. As shown in FIG. 2, an annular (circular) groove 12c is formed in the outer surface portion 12b facing the inner surface portion 15i in the above. A ring-shaped member 16 composed of a C ring made of an elastic body is fitted in the groove 12c. Due to this fitting structure, the ring-shaped member 16 is fixed in the axial direction with respect to the peripheral portion 12 on the proximal end side. A part of the cross section of the ring-shaped member 16 projects outward from the inside of the groove 12c. The support portion 16a, which is a portion protruding from the outer surface 12a of the ring-shaped member 16, is formed on the outer surface portion 12b so as to function as a fulcrum. In the illustrated example, the support portion 16a has a semicircular contour shape (cross-sectional shape) along the axial direction. However, the contour shape of the support portion 16a along the axial direction is not particularly limited, and may be formed in a convex shape protruding from the outer surface 12a of the peripheral portion 12 on the proximal end side. However, the push ring 15 is inclined in the axial direction as described later because the contour shape of the protruding end portion (the portion abutting on the inner surface portion 15i) which is the fulcrum of the support portion 16a is formed in a chevron shape along the axial direction. It becomes easy to get into a posture. The chevron is not limited to the semicircular shape described above, but also includes a triangular shape, a trapezoidal shape, and the like.

In the present embodiment, the support portion 16a may support the inner surface portion 15i of the push ring 15 and serve as a fulcrum so that the push ring 15 can be tilted with respect to the axial direction. Here, of the outer surface 12a of the base end side outer peripheral portion 12, the outer surface portion 12b facing the inner surface portion 15i of the push ring 15 arranged in the non-operating region is provided with the support portion 16a to provide an outer dimension. (Distance (outer radius) or outer diameter from the axis 10x) changes depending on the position in the axis direction. That is, at the position where the support portion 16a is provided, the outer dimension is Ro1, but the outer dimension of the other outer surface portion 12b is Ro2, and Ro1 is larger than Ro2. Here, if the amount of protrusion of the support portion 16a from the outer surface portion 12b is Rp, then Ro1-Ro2 = Rp. As a result, the difference in internal and external dimensions (difference between the outer diameter and the inner diameter or the difference between the outer diameter and the inner diameter) between the outer surface portion 12b and the inner surface portion 15i of the base end side outer peripheral portion 12 is changed in the axial direction. It is possible to increase the tiltable angle range of the push ring 15 in the non-actuated region on the base end side outer peripheral portion 12.

The ring-shaped member 16 is fitted in the groove 12c and extends in the circumferential direction around the axis of the outer surface portion 12b. In the illustrated example, the groove 12c is an annular groove 12c, and the ring-shaped member 16 is a C ring (elastic body) having a notch in a part in the circumferential direction. Here, the ring-shaped member 16 is provided with the notch portion, but if the length of the notch portion is sufficiently short, the ring-shaped member 16 is substantially in a facing relationship with the cylindrical inner surface portion 15i of the push ring 15. It is possible to obtain the same action and effect as when the support portion 16a is formed over the entire circumference (the effect of realizing the fulcrum function at any angle position on the entire circumference), and in fact, as described above. It is preferable to configure it.

Further, in the illustrated example, the cross section of the ring-shaped member 16 is circular. Therefore, the support portion 16a of the ring-shaped member 16 is formed in a semicircular shape or a partial circular shape. Therefore, the contour of the tip portion serving as the fulcrum of the support portion 16a along the axial direction becomes a chevron shape as a whole. As a result, when the support portion 16a abuts on the inner surface portion 15i and acts as a fulcrum, the push ring 15 tends to incline in the axial direction, so that a locking action when an external force F is received is more reliably generated. Will be possible. Of course, the cross-sectional shape of the ring-shaped member 16 and the support portion 16a is not limited to the illustrated example, and may be various shapes such as a polygonal shape and an elliptical shape.

Although different from the present embodiment, instead of or together with the above configuration, the internal dimension (distance (inner radius) or inner diameter) Ri of the inner surface portion 15i of the push ring 15 is set in the axial direction. The range of the tilted posture of the push ring 15 may be increased by changing to. Here, an example in which the inner dimension of the inner surface portion 15i is changed in the axial direction instead of the above configuration corresponds to the second embodiment described later. The change in the inner dimensions in this case is not limited to the same as the illustrated aspect of the outer surface portion 12b of the base end side outer peripheral portion 12, and for example, the inner surface portion 15i is directed toward at least one of the axial directions. It may be configured so as to increase in a stepped shape or gradually increase in a slanted shape. Thereby, the inclination angle of the push ring 15 can be further increased.

In the case of the present embodiment, in the illustrated example, the outer surface portion 12b does not include the first outer surface region of the outer dimension Ro1 provided with the support portion 16a and the support portion 16a, and is flat in the axial direction like the outer surface 12a. It is composed only of the second outer surface region of the outer dimension Ro2 which is composed of the outer surface portion. On the other hand, the inner surface portion 15i of the push ring 15 is composed of a surface (cylindrical surface) having an inner dimension Ri that is flat along the axial direction. As a result, the inner / outer dimensional difference ΔR1 = Ri-Ro1 between the first outer surface region and the inner surface portion 15i, and the inner / outer dimensional difference ΔR2 = Ri-Ro2 between the second outer surface region and the inner surface portion 15i. Is provided. Then, ΔR2-ΔR1 = Ro1-Ro2 = Rp. In the present embodiment, by providing the support portion 16a, the difference between the inner and outer dimensions ΔR1 and ΔR2 is changed, so that the push ring 15 is tilted with respect to the axial direction with the support portion 16a as a fulcrum. Can be done.

Here, even in the conventional example shown in FIG. 10, by ensuring a large difference between the outer dimension of the outer peripheral portion on the base end side of the inserter body and the inner dimension of the push ring 14, it is large with respect to the axial direction of the push ring 14. It is possible to take a tilted posture with a tilt angle. However, in the conventional example, since the outer surface of the insert body and the inner surface of the push ring 14 are both formed of flat surfaces along the axial direction, the push ring 14 stabilizes the tilted posture at a large tilt angle. Cannot be maintained. Therefore, when an external force in the axial direction is applied to the tip side in the axial direction with respect to the flange portion 14a of the push ring 14, it is difficult to maintain the inclined posture, and the outer surface of the insert body and the inner surface of the push ring 14 are in contact with each other. The sliding contact portion makes it easier for the push ring 14 to move toward the tip end side in the axial direction. Therefore, it is not possible to suitably prevent a malfunction due to an external force. In addition, since the difference between the outer dimension of the outer peripheral portion on the base end side of the inserter body and the inner dimension of the push ring 14 becomes large, the backlash increases, so let's operate the push ring 14 in the axial direction to release the coupled state. There is also a problem that the operability is deteriorated.

On the other hand, in the present embodiment, as shown in FIGS. 3 to 5, the convex support portion 16a is provided on the outer surface portion 12b, and the support portion 16a is brought into contact with the inner surface portion 15i of the push ring 15. By using the push ring 15 as a fulcrum, the push ring 15 can be tilted with respect to the axial direction around the support portion 16a. At this time, the inclined posture is generated by bringing the other contact portion of the push ring 15 into contact with the other portion of the outer surface portion 12b with the support portion 16a as a fulcrum, so that it is easy to be stably maintained and the contact is made. The number of points increases and the sliding resistance in the axial direction increases. Therefore, the locking action on the outer surface portion 12b of the push ring 15 can prevent a malfunction when an external force F is received. Further, by providing the support portion 16a, it is possible to reduce the play due to the difference in the inner and outer dimensions between the base end side outer peripheral portion 12 and the push ring 15, so that deterioration of operability at the time of the release operation of the coupled state can be suppressed. Since the support portion 16a is provided in a limited area in the axial direction in the axial range facing the inner surface portion 15i of the push ring 15 and the outer surface portion 12b of the peripheral portion 12 on the proximal end side, the support portion 16a is provided. When the tilt angle of the push ring 15 is small (during the coupling release operation), the frictional resistance in the axial direction of the support portion 16a is low, so that the push ring 15 can be smoothly slid on the peripheral portion 12 on the base end side. Since it is possible, it is unlikely that the operability of the push ring 15 will be hindered when the coupled state is released. Therefore, it is possible to suppress the malfunction of the push ring 15 due to the external force F and to achieve both the operability of the push ring 15.

The above-mentioned action and effect will be described in more detail. In FIG. 3, when the plug-in joint 1 in the coupled state comes into contact with the ground, the floor surface, the stairs, or the like, the contact portion of the flange portion 15a of the push ring 15 receives an external force F, and as a result, the push ring 15 is generated. It is shown that the posture is greatly inclined with respect to the axis 10x of the peripheral portion 12 on the base end side. At this time, the push ring 15 is tilted on the base end side outer peripheral portion 12 with the support portion 16a as a fulcrum, so that the tilted posture is stabilized and the contact point between the base end side outer peripheral portion 12 and the push ring 15 is set. Since the sliding resistance toward the tip side in the axial direction also increases, it becomes more difficult to slide in the axial direction toward the inside of the receiving port 20a. As will be described later, even if the flange portion 15a receives an external force F along the axial direction, the external force F gives a moment of force to the push ring 15, but this moment causes the push ring 15 to have a base end side outer peripheral portion. Although it is pressed against 12, it is considered that it is rarely moved to the tip side in the axial direction.

4 and 5 are enlarged partial cross-sectional views showing an enlarged cross-sectional portion of the upper side of the push ring 15 and a cross-sectional portion of the lower side of the drawing in the state shown in FIG. In the present embodiment, the outer surface portion 12b is provided with a convex support portion 16a, and the push ring 15 is configured to be in an inclined posture with the support portion 16a as a fulcrum. Therefore, it is possible to stably maintain the inclined posture of the push ring 15 with respect to the axis 10x as compared with the case where the support portion 16a is not provided (conventional structure).

In the present embodiment, as shown in FIG. 2, the inner edge of the tip of the inner surface portion 15i from the support portion 16a (a point that actually acts as a fulcrum) with respect to the total length L of the inner surface portion 15i of the push ring 15 in the axial direction. The non-operating region of the push ring 15 so that the distance Ld up to 15d and the distance Lp from the support portion 16a (the point that actually acts as a fulcrum) to the inner edge 15p of the base end of the inner surface portion 15i are secured respectively. The range of arrangement in is set. Here, the Ld and Lp depend on the axial position of the push ring 15 on the outer surface 12a of the outer peripheral portion 12 on the base end side, but in general, the support portion 16a is the tip side and the base of the total length L. It is not operated so that it is not arranged in the range of less than 1/4 of each of the end sides, that is, it is included in the range of 1/4 to 3/4 of the total length L when viewed from the axial tip side of the push ring 15. It is preferable that the arrangement of the push ring 15 in the region is set. This is because when the position of the support portion 16a is too close to each edge portion on the tip end side and the proximal end side in the axial direction of the inner surface portion 15i of the push ring 15, the inclination angle of the inclination posture when the external force F is applied is changed. This is because it is considered that the size becomes smaller and the locking action is less likely to occur. In this sense, the support portion 16a is not arranged in a range of less than 1/3 of the tip end side and the base end side of the total length L, that is, 1 of the total length L when viewed from the axial tip side of the push ring 15. It is desirable that the arrangement of the push ring 15 in the non-operating region is set so as to be included in the range of / 3 to 2/3.

Further, in the present embodiment, when the push ring 15 is arranged in the non-operating region, the support portion 16a is set so as to be arranged on the proximal end side of the half of the total length L in the axial direction. Is preferable. That is, it is preferable that the distance Ld on the distal end side is larger than the distance Lp on the proximal end side (Ld> Lp). As shown in FIGS. 3 and 4, the external force F, which is likely to cause a malfunction in the present embodiment, is directed from the proximal end side to the distal end side in the axial direction with respect to the flange portion 15a of the push ring 15. In order to facilitate the locking action by such an external force F, the tip side (for example, the tip inner edge 15d) of the push ring 15 in the axial direction is the proximal end side outer peripheral portion 12 due to the external force F. It is desirable to have an inclined posture that is pressed against the outer surface 12a, and in order to facilitate this inclined posture, the support portion 16a is located closer to the base end side in the axial direction than half of the inner surface portion 15i of the push ring 15. This is because it is more desirable to be arranged. That is, the position range P in the axial direction of the support portion 16a is preferably arranged on the proximal end side in the axial direction rather than 1/2 of the total length L, and in particular, 2 / of the total length L within this range. It is more desirable that it is 3 or later.

When an external force F is applied to the angular position of the push ring 15 shown in FIG. 4, the push ring 15 is inclined so that the inner edge 15d of the tip abuts on the outer surface 12a of the outer peripheral portion 12 on the base end side. Take a posture. However, in the inclined posture, the tip outer edge 15e at the angle position on the opposite side shown in FIG. 5 is in a state of being separated from the outer surface 12a of the base end side outer peripheral portion 12 contrary to the portion shown in FIG. At this time, since the inclination angle of the push ring 15 is larger than that in the illustrated example, the tip outer edge 15e has the inner dimension (inner diameter) of the tip inner edge portion 21 (the inner edge 23a of the tightening ring 23 and the inner edge 26a of the claw seat 26). By setting the size so that it can be larger than the above, the push ring 15 is interfered with by the tip inner edge portion 21, so that further movement toward the tip side in the axial direction is restricted. In order to obtain such a large inclination angle of the push ring 15, it is conceivable to increase the protrusion amount Rp of the support portion 16a as compared with the case of the illustrated example.

In the illustrated example, the inner dimension Ri of the push ring 15 and the outer dimension Ro1 of the support portion 16a are drawn so as to be substantially equal to each other, but usually, there is a dimensional difference of ΔR = Ri-Ro1 between the two dimensions. exist. If this dimensional difference ΔR is too small or too large, the operability during a normal coupling release operation deteriorates, so it is preferable to set it within an appropriate range. However, it is also necessary to consider that the stability of the tilted posture of the push ring 15 is rather lowered because the backlash increases as the dimensional difference ΔR increases.

In the present embodiment, the push ring 15 can be configured in the same manner as in the conventional example, and the groove 12c is formed on the outer surface 12a of the outer peripheral portion 12 on the base end side of the insertion tool main body of the insertion tool 10, and the ring-shaped member 16 is formed. Since it only needs to be fitted, there is an advantage that the manufacturing cost can be reduced and that the existing product can easily form the support portion. Since the ring-shaped member 16 is configured to be removable from the base end side outer peripheral portion 12, it can be easily replaced. Therefore, the ring-shaped member 16 can be easily repaired and the protrusion amount Rp can be easily changed.

Next, the plug-in type coupling joint 1'of the second embodiment according to the present invention will be described with reference to FIGS. 6-9. Here, FIG. 6 shows the insertion tool 10'of the fire-fighting joint 1 inserted into the receiving port 20a of the receiving tool 20, and the locking claw 24 is completely locked to the locking step portion 11b of the tip cylinder portion 11 to be coupled. It is a vertical cross-sectional view which shows the state which was done. Further, FIG. 7 is an enlarged cross-sectional view showing the push ring 15'and its periphery in the coupled state of the plug-in type joint 1'. In the present embodiment, the same parts can be configured in the same manner as in the first embodiment except for the outer peripheral portion 12'on the base end side of the inserter body of the inserter 10'and the push ring 15', so that the same parts are designated by the same reference numerals. , Their description is omitted.

In the present embodiment, as shown in FIGS. 6 and 7, the outer surface 12a of the base end side outer peripheral portion 12 is made a flat surface in the axial direction in the non-operating region as in the conventional example, and instead, the push ring 15'is used. By forming a groove 15c'extending in the circumferential direction on the inner surface portion 15i'and fitting the ring-shaped member 17 into the groove 15c', a support portion is formed between the inner surface portion 15i'and the outer surface portion 12b'. It forms 17a. The groove 15c', the ring-shaped member 17, and the support portion 17a can be configured in the same manner as the groove 12c, the ring-shaped member 16, and the support portion 16a in the first embodiment, and can be similarly deformed. Is. For example, the notch portion of the ring-shaped member 17 and the contour of the support portion 17a along the axial direction can be configured in the same manner as in the first embodiment.

Also in this embodiment, as shown in FIG. 7, the distance Ld'from the tip inner edge 15d'and the distance from the base end inner edge 15p'of the support portion 17a with respect to the total length L'in the axial direction of the inner surface portion 15i'. The relationship of Lp'is basically the same as the total length L, the distance Ld, and Lp of the first embodiment. However, since the support portion 17a is provided on the inner surface portion 15i'of the push ring 15'and is fixed in the axial direction, the support portion 17a on the inner surface portion 15i' regardless of the position of the push ring 15'in the axial direction. It differs from the first embodiment in that the position is fixed. That is, the position of the support portion 17a is preferably in the range of 1/4 to 3/4 from the tip side in the axial direction on the inner surface portion 15i', and in particular, in the range of 1/3 to 2/3. Is desirable. Further, it is preferable that the position of the support portion 17a is arranged on the proximal end side rather than the half of the inner surface portion 15i'in the axial direction. That is, the position of the support portion 17a is preferably arranged from the tip end side in the axial direction to the proximal end side rather than 1/2 of the total length L', and particularly preferably arranged after 2/3.

In the present embodiment, since the position of the support portion 17a is fixed on the push ring 15'as described above, the fulcrum of the push ring 15'does not move even by the operation during the locking action, so that the support portion 17a By setting the formation position, the optimum design can be made for the inclined posture of the push ring 15'.

It should be noted that the plug-in type joint and its insert according to the present invention are not limited to the above-mentioned illustrated examples, and it is needless to say that various changes can be made without departing from the gist of the present invention. .. In the first embodiment, the support portion 16a is provided on the outer surface 12a of the outer peripheral portion 12 on the base end side of the insert body, and in the second embodiment, the support portion 17a is provided on the inner surface portion 15i'of the push ring 15'. As a result, support portions 16a and 17a, which serve as fulcrums for the inclined posture of the push wheels 15 and 15', are formed between the outer surface portions 12b and 12b'and the inner surface portions 15i and 15i'. It is not limited to the above configuration as long as the stability of the tilted posture of the push wheels 15 and 15'is enhanced. For example, a support portion made of a ring-shaped member that is not attached to either side is interposed between the base end side outer peripheral portion 12'of the inserter main body and the push ring 15, and this is used as the base end side outer peripheral portion of the inserter main body. It may act as a fulcrum when the push ring 15 is tilted with respect to the portion 12'. Further, the support portions 16a and 17a are not limited to the case where the support portions 16a and 17a are formed of a member different from the proximal end side outer peripheral portions 12 and 12'and the push rings 15 and 15'as in the above embodiment, and the proximal end side outer peripheral portions 12 are not limited. ′ Or push ring 15 ′ may be integrally formed.

1,1'... Joining joint, 10 ... Insert, 10a ... Insertion, 10x ... Axis line, 11 ... Tip tube, 11a ... Outer surface, 11b ... Locking step, 11p ... Tip outer edge, 11q ... Base end outer edge , 12, 12'... Base end side outer peripheral portion, 12a, 12a' ... Outer surface, 12b, 12b' ... Outer surface portion, 12c ... Groove, Ro ... Base end side outer peripheral portion outer dimensions, Ro1, Ro2 ... Outer surface portion 12b External dimensions, 13 ... Retaining ring, 14, 15, 15'... Push ring, 15a, 15a' ... Flange, 15b, 15b' ... Cylinder, 15c' ... Groove, 15d ... Tip inner edge, 15e ... Tip outer edge, 15p ... Base end inner edge, 15i, 15i'... Inner surface portion, 16, 17 ... Ring-shaped member, 16a, 17a ... Support portion, Rp ... Support portion protrusion amount, Ld ... Tip side length, Lp ... Base end side length , L ... Overall length in the axial direction of the push ring, 20 ... Receiver, 20a ... Receptacle, 21 ... Tip inner edge, 22 ... Receiver body, 23 ... Retaining ring, 23a ... Inner edge, 24 ... Locking claw, 25 ... Plate Spring, 26 ... Claw seat, 26a ... Inner edge, 27 ... Protective member, 28 ... Packing

Claims (10)

It is a plug of a plug-in type joint that is connected by the locking claw of the receiver while being inserted into the receiver, and the engaging claw is retracted by the push ring to release the coupled state.
A tip cylinder portion provided with a locking step portion on which the locking claw can be engaged on the axial direction proximal end side, a proximal end side outer peripheral portion extending toward the axial proximal end side of the locking step portion, and the base. It has the push ring mounted so as to be slidable in the axial direction on the outer peripheral portion on the end side.
The push ring is located in a limited area in the axial direction between the inner surface portion of the push ring facing the base end side outer peripheral portion and the outer surface portion of the base end side outer peripheral portion facing the inner surface portion. A support portion that can function as a fulcrum when the push ring is inclined with respect to the axial direction when it is arranged in the non-operating area on the proximal end side on the peripheral edge portion on the proximal end side is provided.
Insert for plug-in joints. The support portion is formed in a convex shape protruding toward the other on the surface of at least one of the inner surface portion and the outer surface portion.
The plug of the plug-in type joint according to claim 1. The support portion has a shape extending in the circumferential direction around the axis of the inner surface portion or the outer surface portion.
The plug of the plug-in type joint according to claim 1 or 2. The support portion is composed of a ring-shaped member arranged between the inner surface portion and the outer surface portion.
The plug of the plug-in type joint according to claim 3. The support portion is fixed in the axial direction with respect to the inner surface portion or the outer surface portion.
The plug of the plug-in type joint according to any one of claims 1-4. The circumferential formation range of the support portion is set so that the push ring can be subjected to the fulcrum action by the support portion at any angle position on the entire circumference around the axis.
The plug of the plug-in type joint according to any one of claims 1-5. The support portion is 1/4 of the proximal end side and the distal end side in the axial direction in the axial range in which the inner surface portion and the outer surface portion face each other when the push ring is arranged in the non-operating area. Placed in the area excluding the less than part,
The plug of the plug-in type joint according to any one of claims 1-6. The support portion is arranged in a region closer to the proximal end than half of the axial range in which the inner surface portion and the outer surface portion face each other when the push ring is arranged in the non-actuated region. ,
The plug of the plug-in type joint according to any one of claims 1-7. The support portion has a chevron-shaped contour shape along the axial direction of the tip portion that abuts on the inner surface portion or the outer surface portion as the fulcrum.
The plug-in joint according to any one of claims 1-8. The insert according to any one of claims 1-9 and the insert.
A receiving port configured to accept the tip tube portion and being urged inside the receiving port in a protruding direction to engage with the locking step portion to form a bonded state, and the base in the bonded state. A receiver having a locking claw configured to retract by the push ring inserted into the working area on the distal end side on the outer peripheral portion on the distal end side and to release the coupled state is provided.
Plug-in joint.

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