WO2018216143A1

WO2018216143A1 - Lock mechanism for tubular body

Info

Publication number: WO2018216143A1
Application number: PCT/JP2017/019385
Authority: WO
Inventors: 根津　幹夫
Original assignee: 株式会社ニフコ
Priority date: 2017-05-24
Filing date: 2017-05-24
Publication date: 2018-11-29

Abstract

Provided is a lock mechanism for a tubular body, with which the tubular body is attached to and removed from a tubular housing through engagement and disengagement of a lock member provided on the housing with respect to an engagement part provided on the tubular body, the lock mechanism being characterized in that the lock member has lock pieces that engage and disengage from the engagement part of the tubular body, the lock member is held so as to be capable of moving in the radial direction of the housing such that the lock pieces can move between the outside and the inside of the housing or traverse an end surface of the housing in the radial direction, and from a state where the lock pieces have been pulled out to the outside of the housing tube, the lock member can rotate inclining toward the housing tube.

Description

Locking mechanism of tubular body

発明 The present invention relates to a tubular body locking mechanism.

FIGS. 8A and 8B show a locking mechanism called a fluid quick connector disclosed in Patent Document 1. FIG. This locking mechanism engages and disengages a locking member (retainer) 130 provided on a tubular body (end frame) 52 with respect to a cylindrical housing 20 with an engaging portion provided on the tubular body 52. It is the structure which attaches and detaches. Here, the tubular body 52 has a flange 64 protruding to the outer periphery as an engaging portion. The housing 20 is divided into substantially concave shapes by inner and

outer flanges

28 and 26 whose end portions 22 are slightly larger in diameter, and a cylindrical trap hat 50 is internally sealed from the concave portion along the hole. The tubular body 52 is inserted into the hole of the housing with the flange 64 positioned at the corresponding portion of the trap hat 50, and can be attached and detached by moving the lock member 130 in the radial direction with respect to the housing 20. That is, the lock member 130 has a large-diameter hole portion 158 and a small-diameter hole portion 162 communicating with each other, and is assembled so as to be movable to the left and right in the radial direction with respect to the outer flange 28 of the housing.

In the lock mechanism described above, the lock member 130 switches from the disengaged state in which the tubular body 62 is inserted through the large-diameter hole 158 to the engaged state when it moves in the radial direction and is inserted into the small-diameter hole 162. It is done. In the engaged state, as shown in FIG. 8B, the flange 64 hits the inner surface of the partition edge of the hole 162, so that the tubular body 52 cannot be pulled out.

JP 2006-132863 A

The lock mechanism as described above is used when, for example, the housing is attached to or detached from the tubular body to open and close one end of the tubular body, in addition to connecting / separating pipes or pipes by attaching and detaching the tubular body and the housing. . As basic characteristics, in particular, in addition to being able to perform both engagement and disengagement operations with one touch, the lock member protrudes greatly from the housing as in Patent Document 1, so that the appearance is not impaired or disturbed, and the housing is a lock member. It is also desirable that it be easily transported and cleaned in the attached state, that is, before being connected to the tubular body.

The object of the present invention is to solve the above-described problems and simplify the whole even if the housing has a lock member. The lock member protrudes in the outer diameter direction in a state where the lock member is inclined in the cylinder direction of the housing. An object of the present invention is to provide a tubular body locking mechanism which suppresses the amount and thereby has excellent appearance and handling. Other purposes will be clarified in the following description.

In order to achieve the above object, according to the present invention, a tubular member is engaged with and disengaged from a tubular housing with a locking member provided in the housing in an engaging portion (for example, a circumferential groove) provided in the tubular member. And a locking mechanism for the tubular body to be attached and detached, wherein the locking member has a locking piece that engages with and disengages from the engaging portion of the tubular body, and the locking piece can penetrate inside and outside the cylinder of the housing or the housing. The housing is held so as to be movable in the radial direction of the housing so that the end surface of the housing can be traversed in the radial direction. It is characterized by being movable.

The present invention described above may be embodied as the following aspect.
(A) The lock member has a substantially C-shape along the cylindrical shape of the housing, and both ends of the C-shape are connected and held to corresponding portions of the housing via support portions. According to this aspect, the amount of overhang from the housing can be easily suppressed, and the housing is stably held by the support portion.
(A) The housing and the lock member each have one of an engaging part and an engaged part that can be engaged and disengaged with each other, and the lock member is rotated so as to be inclined in the cylinder direction of the housing Sometimes, the structure is held in an inclined state through the engagement of the engaging portion and the engaged portion. According to this aspect, for example, when the lock member is tilted in the cylinder direction of the housing in a state where the housing is detached from the tubular body, the tilted state is held by the engagement of the engaging portion and the engaged portion. It will not be rattled in time, etc., making it easier to handle.

(C) The engaging part is a convex part provided in the housing, and the engaged part is a long hole part provided in the lock member and extending in the longitudinal direction of the lock member. is there. According to this aspect, since the engaging part and the engaged part can be easily added by adding simple shapes such as a convex part and a long hole part, the manufacturing cost can be suppressed and the commercial value can be improved.
(D) The support portion has a shaft portion provided in one of the lock member and the housing and a length provided in the other and extending in the longitudinal direction of the lock member so as to be movable with respect to the shaft portion. It is the structure which consists of a hole. According to this aspect, the lock member can be moved relative to the housing in the radial direction of the housing and can be pivotally connected in the cylindrical direction of the housing.

(E) The housing has a restriction wall portion that covers at least a part of the front end side of the lock member and prevents the lock member from spreading outward. According to this aspect, it is possible to prevent the lock member from being spread outwardly in the engaged state, that is, from being radially outwardly spread by the restriction wall portion, and to eliminate the possibility of inadvertently releasing the engagement due to vibration or the like.
(F) The housing has a guide means comprising a wall or a groove for guiding the movement of the lock member. According to this aspect, when the lock member is switched between the engaged state and the disengaged position, a stable switching operation can be maintained by the guide means, thereby improving the reliability.
(G) The housing includes a slit that allows a part of the lock piece to protrude into and out of the cylinder. According to this aspect, since the lock piece enters the housing cylinder through the slit and can be engaged with the engaging portion of the tubular body, compared to the configuration in which the locking piece is engaged with and disengaged from the engaging portion of the tubular body along the housing end surface, Appearance can be improved.

According to the present invention, even when the lock member is in the engaged state and in the disengaged state, it is easy to suppress the protruding portion from the housing, and it is easy to make the housing compact with the lock member. Are better.

1A and 1B show the main part of a locking mechanism for a tubular body according to an embodiment of the present invention, and FIG. 1A is a perspective view showing the relationship between a housing, a tubular body, and a locking member. (B) is the half section of the housing. 2 (a) and 2 (b) show a state in which the tubular member is inserted into the housing from the state shown in FIGS. 1 (a) and 1 (b) and the lock member is raised (disengagement position). Is a perspective view thereof, and FIG. 2B is a perspective view of the housing of FIG. 3 (a) and 3 (b) show a state where the lock member is moved in the engaging direction from the state shown in FIGS. 2 (a) and 2 (b), FIG. 3 (a) is a perspective view thereof, and FIG. 3 (b). FIG. 4 is a perspective view of the housing of FIG. 4 (a) to 4 (c) show details of the locking mechanism shown in FIGS. 1 (a) and 1 (b), FIG. 4 (a) is a top view, FIG. 4 (b) is its side view, and FIG. c) is a cross-sectional view taken along the line A1-A1 of FIG. 5 (a) to 5 (c) show details of the locking mechanism shown in FIGS. 2 (a) and 2 (b), FIG. 5 (a) is a top view, FIG. 5 (b) is a side view thereof, and FIG. c) is a cross-sectional view taken along line A2-A2 of FIG. 6 (a) to 6 (c) show details of the locking mechanism shown in FIGS. 3 (a) and 3 (b), FIG. 6 (a) is a top view, FIG. 6 (b) is a side view thereof, and FIG. c) is a cross-sectional view taken along line A3-A3 of FIG. 7 (a) and 7 (b) are perspective views showing two examples corresponding to FIG. 1 (a), which are modifications of the above embodiment. 8 (a) and 8 (b) show the lock mechanism of Patent Document 1, FIG. 8 (a) is a perspective view showing the relationship between the housing and the retainer (corresponding to the lock member), and FIG. 8 (b) is in the locked state. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In this description, after describing the mechanism features and the operation features of the lock mechanism, reference will be made to changes in the modification of FIG.

(Mechanism Feature) The lock mechanism of the embodiment is a type that allows the tubular body 2 to be attached and detached by the lock member 3 in a state where the corresponding end side is inserted into the tubular housing 1. The lock member 3 has a lock piece 33 that engages with and disengages from the circumferential groove 21 that is an engagement portion provided in the tubular body 2, and is held to be movable with respect to the housing 1 in the radial direction of the housing. The piece 33 can be rotated so as to be inclined in the cylinder direction of the housing 1 from the disengaged state where the piece 33 has come out of the cylinder of the housing 1.

The use of the lock mechanism is suitable for specifications in which pipes, pipes, hoses and the like are connected and separated by attaching and detaching the tubular body 2 and the housing 1 or the housing 1 is frequently attached and detached from the tubular body 2. is there. Moreover, although the housing 1 and the tubular body 2 are both resin molded products, the material of the constituent members may be other than resin. The lock member 3 is made of metal, but may be other than metal.

Here, the housing 1 includes a receiving tube portion 10 which constitutes one end side and serves as an inlet for inserting the tubular body 2 as shown in FIGS. 4 (a) to 4 (c) and FIGS. 5 (a) to 5 (c). The other end side is composed of a connection part 11 for inserting and connecting the pipe member 7 such as a pipe or a hose to the outer periphery, and an intermediate part constituting between the receiving cylinder part 10 and the connection part 11.

The inner diameter 13 of the saddle housing is substantially the same as the inner diameter 13 a of the receiving cylinder portion 10 and the inner diameter 13 b of the intermediate portion, and is larger than the inner diameter 13 c of the connection portion 11. A partition ring wall 14 is provided between the inner diameter 13a and the inner diameter 13b (see FIG. 1B). A substantially ring-shaped seal member 4 is attached to the inner diameter 13b (see FIGS. 1B and 4C). The inner diameter 13 c of the connecting portion 11 is formed so that the inner side is substantially the same diameter as the inner diameter of the ring wall 14, and the end side is smaller in diameter than that. And the sealing member 4 keeps the corresponding tube part 20 for insertion of the tubular body 2 mentioned later in a watertight state.

As shown in FIGS. 1 (a) and 1 (b), on the outer periphery of the receiving cylinder portion 10, a bowl-shaped wall 10a protruding around the edge, and facing the wall 10a with a predetermined distance from the wall 10a. And a ridge-like wall 10c that protrudes and an arc-shaped groove 10b that is partitioned between the wall 10a and the wall 10c. Among these, the wall 10a is provided with a total of three slits 12 on the upper side and the left and right sides provided in a state where a part of the groove 10b side is cut off. Each slit 12 penetrates inside and outside the cylinder. As for the slit width, the upper slit is formed shorter than the left and right slits.

The groove 10 b is provided with two shaft portions 15 projecting at positions corresponding to the left and right slits 12 and a convex portion 16 b that is an engaging portion projecting below each shaft portion 15. . The wall 10c is provided with a substantially vertical receiving portion 10d in which a circular arc portion facing the shaft portion 15 is cut out, and a convex portion 16a which is another engaging portion protruding from the receiving portion 10d. In addition, the

walls

10a and 10c are provided with restriction wall portions 17 at portions sandwiching the convex portions 16b. The restriction wall portion 17 is adapted to stably maintain the engagement state of the lock member 3 by fitting the corresponding end portion of the lock member 3 between the bottom surface of the groove 10b and to spread the lock member 3 to the outside. Stop.

On the other hand, as shown in FIG. 1 (a), the tubular body 2 is inserted into the housing 1 and has an insertion corresponding tube portion 20 on one end side that forms a circumferential groove 21 on the outer periphery of the tube, The connecting portion 22 is provided on the other end side and connected to the pipe member 6 such as a pipe or a hose. The inner diameter 23 of the tubular body is substantially the same diameter as the minimum diameter of the inner diameter 13c of the housing side connecting portion 11. The circumferential groove 21 is partitioned by a front flange portion 24 and a rear flange portion 25.

As shown in FIG. 5, the tubular body 2 is inserted into the corresponding tube portion 20 and the circumferential groove 21 until the flange portion 25 on the rear side of the inner diameter 13 of the housing 1 hits the bowl-shaped wall 10a around the edge. Is done. In the inserted state, the end 26 of the corresponding tube portion 20 is fitted to the maximum diameter of the inner diameter 13c of the housing side connecting portion 11, the corresponding tube portion 20 is in close contact with the seal member 4, and the slit 12 is It communicates with the circumferential groove 21.

Note that the corresponding end portion of the pipe member 6 is mounted in a state of being tightened by the tightening band 8 as necessary after the outer periphery of the connection portion 22 is pushed into the inner diameter side (see FIG. 4A). The corresponding end portion of the tube member 7 is also mounted in a state of being tightened by the tightening band 9 as necessary after the outer periphery of the connection portion 11 is pushed into the inner diameter side (see FIG. 4A).

On the other hand, as shown in FIG. 1A to FIG. 3B, the lock member 3 has a substantially C shape corresponding to the arc of the groove 10 b described above and is attached to the left and right middle of the main body 30. A pick ring 36 is provided. Both side end portions 31 of the main body 30 are provided with long hole portions 32 which are bent substantially vertically and which are engaged portions extending up and down in the middle of the plate width.

Lock pieces 33 are respectively provided on the end surfaces on the same side of the left and right middle and both side end portions 31 of the main body 30. As shown in FIGS. 3 (a) and 3 (b), both the long hole portions 32 are slidably engaged with the shaft portion 15, and the convex portion 16b can be engaged with the inner end portion of the long hole portion. It is a hole. Each lock piece 33 has a shape that can be projected and retracted in the corresponding slit 12 on the housing side. Further, the pick ring 36 is attached using the locking portion 35 cut and raised in the middle of the left and right sides of the main body 30 (see FIG. 2A), but may be attached by other methods. .

The lock member 3 described above is located on the outer periphery of the housing 1 as inferred from FIGS. 2 (a) and 2 (b), for example, with both end portions 31 outward along the groove 10b between the wall 10a and the wall 10c. Both shaft portions 15 are engaged and assembled with the corresponding long hole portions 32 by moving downward while slightly expanding.

(Operation) The above locking mechanism is particularly excellent in terms of operation characteristics as follows.
First, in this lock mechanism, when the tubular body 2 is inserted and connected to the housing 1 or when the housing 1 and the tubular body 2 are inserted and connected close to each other, FIGS. 2 (a), 2 (b) and 5 (a). ) To (c), when the corresponding tube portion 20 is inserted into the receiving cylinder portion 10 from the disengaged state of the lock member 3, the front end 26 of the corresponding tube portion 20 contacts the seal member 4 during the insertion. But push further. Then, the corresponding tube portion 20 is moved to the inner diameter 13 c with the elastic displacement of the seal member 4.

Next, when the lock member 3 is pressed downward as shown in FIGS. 3 (a) and 3 (b) and FIGS. 6 (a) to 6 (c), the tips of the both side end portions 31 are projected 16b in the middle. However, if the pressing operation is further increased, the convex portion 16b is engaged with the lower side of the long hole portion 32 while the convex portion 16b is elastically mounted, and the shaft portion 15 is engaged with the upper side of the long hole portion 32. Match. At the same time, each lock piece 33 is engaged with the circular groove 21 from the corresponding slit 12, so that the tubular body 2 is connected to the housing 1 and cannot be removed carelessly. Even if the lock member 3 receives an upward stress due to external vibration or the like due to the engagement of the shaft portion 15 and the convex portion 16b with the long hole portion 32, the lock member 3 is stably held in the engaged state. Further, in the above locking mechanism, the locking member 3 is engaged in such a manner that the locking member 3 is wound around the arc-shaped groove 10b of the housing, so that the appearance is simple, and there is no possibility of being in the way during use.

Secondly, when the lock member 3 is pulled up via the ring 36, the lock member 3 is moved from the engaged state shown in FIGS. 3A and 3B and FIGS. 6A to 6C to FIGS. ) And FIGS. 5A to 5C are switched to the disengaged state. In this pulling up process, after each convex portion 16b is detached from the long hole portion 32 with elastic displacement of the both side end portions 31, the both end portions 31 are sandwiched between the

walls

10a and 10c or the grooves 10b. It is moved smoothly in a state where it is fitted in. The lock member 3 is moved until the shaft portion 15 is contacted and regulated by the lower side of the long hole portion 32, and each lock piece 33 is disengaged from the circumferential groove 21 and the slit 12.

Further, in the disengaged state, the lock member 3 is held in an upright state by the engagement of the shaft portion 15 with the elongated hole portion 32 and the pressure contact force of the convex portion 16a with respect to the corresponding side edge of the both end portions 31. It has become. For this reason, in the above lock mechanism, when the lock member 3 is switched from the engaged state to the disengaged state, or when the lock member 3 is switched from the disengaged state to the engaged state again, the one-touch operation can be performed.

Thirdly, in this lock mechanism, for example, when the housing 1 is transported to the assembly line with the lock member 3 assembled, the lock member 3 is shown in FIGS. FIGS. 1 (a), 1 (b) and 4 (a) to 4 (c) show the standing state of a) to (c), that is, the disengaged state in which each lock piece 33 is positioned outside the cylinder of the housing 1. As described above, the rotating operation is performed so that both the shaft portions 15 are tilted toward the cylindrical direction of the housing 1, that is, toward the connecting portion 11. Then, in the lock member 3, the corresponding side edges of the side end portions 31 come into contact with the convex portion 16 a. However, when the lock member 3 is further strongly rotated, the convex portion 16 a engages with the elongated hole portion 32 while elastically riding on the convex portion 16 a. To do. Therefore, even if the lock member 3 is subjected to stress in the standing direction due to external vibration or the like, the lock member 3 is held in the inclined form, and thus is excellent in handleability.

The operation of connecting the tubular body 2 to the housing 1 is not limited to the above operation. For example, as shown in FIGS. 2 (a) and 2 (b) and FIGS. 5 (a) to 5 (c), the lock member 3 is disengaged. Then, after the corresponding tube portion 20 is inserted into the receiving cylinder portion 10, the lock member 3 is finally engaged as shown in FIGS. 3 (a) and 3 (b) and FIGS. 6 (a) to 6 (c). It is also possible to switch. In addition, since the lock member 3 is arranged on the outer side and is visible and compact, the lock mechanism described above has a cleaner appearance and is easier to carry than the Patent Document 1.

(Modifications) The modification examples shown in FIGS. 7A and 7B are two examples in which the details are changed as compared with the above-described embodiment example. In this description, only changes to the above embodiment are described in order to avoid duplication.

7A, the connecting portion 11 of the housing 1 and the connecting portion 22 of the tubular body 2 are changed to the long connecting portion 18 and the connecting portion 27 and inserted into the tube members 6 and 7. It has a plurality of orbiting

claws

19 and 28 that are sometimes difficult to come off.

変形 Fig. 7 (b) is an example in which a part of the wall 10a on the edge side of the housing 1 is cut and changed from the slit 12 to the recessed portion 12a. In this configuration, the circular bowl-shaped wall 10a of the embodiment is divided into a plurality of piece-shaped walls 10d, and the lock piece 33 has a recess 12a that forms the end face of the housing 1 instead of the slit 12. Cross in the radial direction.

As described above, the tubular body locking mechanism according to the present invention only needs to have the configuration specified in the claims, and the details can be further changed or developed with reference to the form examples and the modification examples. is there. For example, the use may be a tubular body locking mechanism for attaching / detaching a tubular body to / from the housing. For example, the housing may be attached / detached to / from the fixed tubular body, or the tubular body may be attached / detached to / from the fixed housing. It can be used. Further, the housing can be configured as a lid or a cap by omitting the connecting portion on the opposite side to the receiving tube portion and using a shielding wall instead of the connecting portion. As the pipe member, a pipe or a hose is assumed, but a metal pipe or the like may be used.

1 ······ Housing (10 is a receiving tube portion, 11 is a connecting portion)
2 ... Tube (20 is the corresponding tube part, 22 is the connecting part)
3 ······ Locking member 5 ·········· Supporting part (15 is a shaft part, 32 is a long hole part)
6 ... pipe member 7 ...

pipe member

10a, 10c ... wall (guide means)
10b ... ・ Groove (guide means)
12 ......... Slit 12a ......... Step end face 15 ......... Projection (engaging part)
16a... Convex part (engagement part)
16b ・・・・・・・ Convex part (engagement part)
17 ・・・・・・・・ Restriction wall 21 ・・・・・・・・ Circumferential groove (engagement part)
32 ... Long hole (engaged part)
33 ... Lock piece The entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2016-040025 filed on March 2, 2016 are here. It is incorporated by reference as a disclosure of the specification of the present invention.

Claims

A tubular body locking mechanism that attaches and detaches a locking member provided on the tubular body with respect to a tubular housing by engaging and disengaging a locking member provided on the tubular body,
The lock member has a lock piece that engages with and disengages from the engaging portion of the tubular body, and the lock piece can penetrate the inside and outside of the cylinder of the housing or can traverse the end surface of the housing in the radial direction. A lock for a tubular body, wherein the lock is held so as to be movable in the radial direction of the housing, and the lock piece can be rotated so as to be inclined in the cylinder direction of the housing from a state where the lock piece is pulled out of the cylinder of the housing. mechanism.
The lock member has a substantially C-shape along a cylindrical shape of the housing, and both end sides of the C-shape are connected and held to corresponding portions of the housing via support portions. A locking mechanism for a tubular body as described in 1).
The housing and the lock member each have one of an engaging portion and an engaged portion that can be engaged with and disengaged from each other, and the engagement member is rotated when the lock member is rotated so as to be inclined in the cylinder direction of the housing. 3. The tubular body locking mechanism according to claim 1, wherein the tubular body locking mechanism is held in an inclined state through engagement of a joint portion and the engaged portion.
The engagement portion is a convex portion provided in the housing, and the engaged portion is a long hole portion provided in the lock member and extending in a longitudinal direction of the lock member. Item 4. The tubular body locking mechanism according to Item 3.
The support portion includes a shaft portion provided in one of the lock member and the housing, and a long hole portion provided in the other and extending in a longitudinal direction of the lock member and movably fitted to the shaft portion. The locking mechanism for a tubular body according to claim 2 or 3, characterized in that:
The said housing has a control wall part which covers at least one part of the front end side of the said lock member, and can prevent the expansion to the outside of a lock member, The any one of Claim 1 to 5 characterized by the above-mentioned. A locking mechanism for a tubular body as described in 1).
7. The tubular body locking mechanism according to claim 1, wherein the housing has guide means including a wall or a groove for guiding the movement of the locking member.
The tubular housing locking mechanism according to any one of claims 1 to 7, wherein the housing has a slit that allows a part of the locking piece to protrude into and out of the cylinder.