JP7339050B2 - Through-wall joints and installation methods of through-joints - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a through-wall joint that is attached to a wall through an attachment hole in the wall, and a method of attaching the same.

A joint that is attached in a state of penetrating an attachment hole formed in a wall is known (see, for example, Patent Document 1).

This joint is attached to the wall by inserting the tubular connecting portion into the mounting hole formed in the wall plate and tightening the wall plate with a pair of nuts screwed onto the male threaded portion formed on the outer peripheral surface of the connecting portion. It is designed to be

JP-A-2001-73422

When installing this joint, the joint with one nut attached is inserted into the mounting hole from one side of the wall plate, and the other nut is screwed into the male thread from the other side of the wall plate. Since the mounting hole has a larger diameter than the male threaded portion, the joint will fall out of the mounting hole unless a nut is screwed in from the other side while holding down the joint from one side. Therefore, there is room for improvement in that the mounting work may become difficult, such as when the mounting hole is opened after the wall is completed and the joint is mounted.

SUMMARY OF THE INVENTION In view of the above facts, it is an object of the present invention to provide a through-wall joint that facilitates attachment to an attachment hole formed in a wall, and a method for attaching the through-wall joint.

A through-wall joint according to claim 1 includes a joint body having a male screw formed on an outer peripheral portion thereof and passing through a mounting hole formed in a wall; a first nut, a second nut arranged on the other side of the wall and screwed onto the male screw, and a second nut arranged between the mounting hole and the joint body, and the joint body and the mounting hole are separated by a diameter. a holding member that presses in a direction to hold the joint body in the mounting hole, and the first nut has a convex boss that is inserted into the mounting hole formed on the inner peripheral side of the first nut. the holding member includes an inner locking portion that is locked to the outer circumference of the boss or the outer circumference of the joint body, and an outer locking portion that is locked to the inner peripheral surface of the mounting hole; The holding member has a plurality of outer engaging portions elastically deformable in the radial direction of the holding member. The diameter of the circle is set larger than the inner diameter of the mounting hole.
In the through-wall joint according to claim 1, the first nut is screwed onto the male thread of the joint body, and the holding member is attached to the joint body and inserted into the mounting hole, whereby the holding member is attached to the joint body and the mounting hole. can be pressed radially to retain the coupling body in the mounting hole.

After holding the joint body in the mounting hole, the second nut is screwed onto the male thread of the joint body and tightened, and the through-wall joint is inserted into the mounting hole by clamping the wall between the first and second nuts. attached and fixed to the

Thus, in the wall-penetrating joint according to claim 1, the joint body to which the first nut is attached can be held in the mounting hole using the holding member. In addition, it is not necessary to perform the tightening operation while holding down the joint body by hand so that the joint body does not drop out of the mounting hole, which facilitates the work of mounting the through-wall joint.

A through-wall joint according to claim 1 has a first nut screwed onto a male thread of a joint body, and an inner locking portion formed on a holding member is locked to the outer periphery of the boss or the outer periphery of the joint body, By locking the outer locking portion to the inner peripheral surface of the mounting hole, the joint body can be held (in other words, temporarily fixed or temporarily fixed) in the mounting hole.

After holding the joint body in the mounting hole, the second nut is screwed onto the male thread of the joint body and tightened, and the through-wall joint is inserted into the mounting hole by clamping the wall between the first and second nuts. attached and fixed to the

Thus, in the wall-penetrating joint according to claim 1 , the joint body to which the first nut is attached can be held in the mounting hole using the holding member. In addition, it is not necessary to perform the tightening operation while holding down the joint body by hand so that the joint body does not drop out of the mounting hole, which facilitates the work of mounting the through-wall joint.

In the wall-penetrating joint according to claim 1 , a plurality of outer locking portions are formed on the outer peripheral portion of the annular holding member so as to be elastically deformable in the radial direction of the holding member. Since the diameter of the imaginary circumscribed circle passing through the directional outer end is set to be larger than the inner diameter of the mounting hole, when the holding member is pushed into the mounting hole, the diametrically outer end of the outer engaging portion contacts the inner peripheral surface of the mounting hole. The outer engaging portion is elastically deformed radially inwardly. Here, the free state means a state in which the holding member is not inserted into the mounting hole, is not attached to the joint body, and is not deformed.
A plurality of outer locking portions formed on the holding member attached to the through-wall joint elastically press against the inner wall surface of the mounting hole, and the radially outer ends of the outer locking portions and the inner wall surface of the mounting hole are brought into contact with each other. A large frictional force is generated between and holds the joint main body in the mounting hole while passing through the mounting hole.

A through-wall joint according to claim 2 includes a joint body having a male screw formed on an outer peripheral portion thereof and passing through a mounting hole formed in a wall; a first nut, a second nut arranged on the other side of the wall and screwed onto the male screw, and a second nut arranged between the mounting hole and the joint body, and the joint body and the mounting hole are separated by a diameter. a holding member that presses in a direction to hold the joint body in the mounting hole, and the first nut has a convex boss that is inserted into the mounting hole formed on the inner peripheral side of the first nut. The holding member includes an inner engaging portion engaged with the outer circumference of the boss or the outer circumference of the joint body, and an outer engaging portion engaged with the inner peripheral surface of the mounting hole. A plurality of stop portions are provided on the inner peripheral portion of the holding member, and each radially inner end is screwed to the male screw, and a plurality of the outer engaging portions are provided on the outer peripheral portion of the holding member. The radially outer side is inclined to be positioned closer to the boss than the radially inner side, and the radially inner side is elastically deformed radially outward when pressed against the boss of the first nut. The radially outer end is pressed against the inner peripheral surface of the mounting hole.
In the through-wall joint according to claim 2 , the holding member is attached to the joint body by screwing the radially inner end of the inner locking portion formed in the holding member into the male thread of the joint body.
The joint body to which the first nut and the holding member are attached is inserted into the mounting hole from one side of the wall, and the joint body is rotated while pressing the first nut against the one side surface of the wall to move the holding member to the first nut. , and presses the radially inner surface of the outer engaging portion against the boss. As a result, the outer engaging portion is deformed radially outward, and the radially outer end presses the inner peripheral surface of the mounting hole, causing a gap between the radially outer end of the outer engaging portion and the inner wall surface of the mounting hole. Since a large frictional force is generated in the joint body, the joint body is held in the mounting hole in a state of being passed through the mounting hole.

A method for mounting a through-wall joint according to claim 3 is the method for mounting a through-wall joint according to claim 1 or claim 2, wherein a mounting hole for inserting a joint body having a male thread formed on an outer peripheral portion thereof is provided. a step of forming a mounting hole in a wall, and mounting the joint body, to which a holding member for locking the joint body in the mounting hole and having a first nut screwed to the male screw, is mounted from one side of the wall a joint holding step of inserting and holding the joint main body in the mounting hole; and a fixing step of fixing the joint body to the wall by sandwiching the wall.

In the method of mounting a through-wall joint according to claim 3 , in the mounting hole forming step, a mounting hole into which the joint body is inserted is formed in the wall.

In the joint holding step, a holding member is attached to the joint main body, and the joint main body to which the holding member is attached and the first nut is screwed to the male screw is inserted from one side of the wall to hold the joint main body in the mounting hole.

In the fixing step, the joint body is fixed to the wall by screwing the second nut onto the male screw protruding to the other side of the wall and clamping the wall between the first nut and the second nut.

According to a fourth aspect of the invention , there is provided a method for installing a through-wall joint according to the third aspect , wherein the gap between the mounting hole and the joint body is sealed between the joint holding step and the fixing step. A filling step is provided for filling the material.

In the method of mounting a through-wall joint according to claim 4 , the gap between the mounting hole and the joint body is filled with the sealing material in the filling step of the joint holding step and the fixing step. A gap between the mounting hole and the joint body is filled with a sealing material to fill the gap, and water or the like moves from one side of the wall to the other side or vice versa through the gap. is prevented.

As described above, the through-wall joint of the present invention has the excellent effect of facilitating attachment to the attachment hole formed in the wall.
Further, according to the method for attaching a through-wall joint of the present invention, there is an excellent effect that the through-wall joint can be easily attached to the attachment hole formed in the wall.

1 is a cross-sectional view showing the through-wall joint of the first embodiment attached to a wall; FIG. 1 is an exploded perspective view showing a through-wall joint according to a first embodiment; FIG. FIG. 4 is an enlarged cross-sectional view showing the vicinity of a boss of the first nut; 4A is a plan view showing a holding member used in the wall-penetrating joint according to the first embodiment, and FIG. 4B is a cross-sectional view of the holding member taken along line 4B-4B shown in FIG. 4A. FIG. FIG. 4 is a cross-sectional view showing the second embodiment through-wall joint mounted on a wall; FIG. 5 is an exploded perspective view showing a through-wall joint according to a second embodiment; FIG. 4 is an enlarged cross-sectional view showing the vicinity of a boss of the first nut; FIG. 11 is a plan view showing a holding member used in the wall-penetrating joint according to the second embodiment;

[First embodiment]
A through-wall joint 10 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG.
FIG. 1 shows a cross-sectional view of a through-wall joint 10 according to a first embodiment mounted in a mounting hole 14 formed in a wall 12 . FIG. 2 shows the through-wall joint 10 in an exploded perspective view.

As shown in FIGS. 1 and 2, the through-wall joint 10 includes a joint body 16, a first nut 18, a water stop member 20, a holding member 22, and a second nut 24. As shown in FIG.

The joint main body 16 includes a tubular member 30 having a male screw 26 and a male screw 28 formed on the outer periphery thereof, and a tube connecting portion 32 is provided on one side of the tubular member 30 .

A first nut 18 and a second nut 24 are screwed on a male screw 26 formed in an axially intermediate portion of the cylindrical member 30, and the pipe connecting portion 32 of the cylindrical member 30 is provided on the side thereof. A faucet, faucet, or the like (not shown) is connected to the male screw 28 formed at the end on the opposite side. A pair of flat portions 36 that are parallel to each other are formed at the end portion of the male screw 26 on the male screw 28 side of the cylindrical member 30 . Tools such as spanners and wrenches can be hung on the pair of flat portions 36 .

The pipe connection portion 32 is a so-called one-touch joint, and for example, a pipe body 40 made of synthetic resin for water supply is connected.
The pipe connecting portion 32 includes an intermediate ring 32A arranged outside the small diameter portion of the tubular member 30, a sleeve 32B arranged outside the intermediate ring 32A, and a space between the small diameter portion of the tubular member 30 and the intermediate ring 32A. It includes a lock ring 32C that prevents the inserted tubular body 40 from coming off, an O-ring 32D that seals the gap between the small-diameter portion of the tubular member 30 and the tubular body 40, and the like.

A hexagonal nut portion 38 is formed between the male screw 26 and the pipe connection portion 32 in the tubular member 30 for engaging a tool such as a spanner or a wrench.

The first nut 18 has a larger diameter than the mounting hole 14 and has a hexagonal outer shape. One surface of the first nut 18 is integrally formed with an annular boss 42 which has a slightly smaller diameter than the mounting hole 14 and is inserted into the mounting hole 14 .

As shown in FIGS. 1 and 3, a hook portion 42A having an arrowhead cross section is formed on the outer periphery of the boss 42 on the tip side. The outer diameter φ1 of the hooking portion 42A is formed to be slightly larger than the outer diameter φ2 of the boss 42, and the hooking portion 42A has a tapered shape that decreases toward the distal end side of the boss 42. As shown in FIG.

As shown in FIGS. 1 and 2, the second nut 24 has a larger diameter than the mounting hole 14 and a hexagonal outer shape.

The water stop member 20 is made of an elastic material such as synthetic resin or rubber, and has an annular shape.

As shown in FIG. 1 , the mounting hole 14 formed in the wall 12 has a larger diameter than the joint body 16 and a smaller diameter than the first nut 18 and the second nut 24 .

In the through-wall joint 10 inserted into the mounting hole 14 and attached to the wall 12 , the pipe connection part 32 is arranged on the back side of the wall 12 (the side on which the tubular body 40 is arranged; the arrow IN direction), The shaped member 30 passes through the mounting hole 14, and the male screw 28 side is exposed on the front side of the wall 12 (the arrow OUT direction side).

A first nut 18 is screwed on the male screw 26 of the cylindrical member 30 on the side of the hexagonal nut portion 38 , and the water stop member 20 is interposed between the first nut 18 and the wall 12 .

A holding member 22 is inserted into the mounting hole 14 from the back side of the wall 12 (in the direction of the arrow IN).

As shown in FIGS. 1 and 4, the holding member 22 of the present embodiment is formed by press-molding a thin metal plate, and has an inner diameter larger than the outer diameter of the boss 42, and an outer diameter of the boss 42. An annular portion 44 having a smaller diameter than the inner diameter of the waterproof member 20 is provided.

A plurality of inner claws 46 (in this embodiment, four at 90° intervals) protruding radially inward are formed along the inner peripheral portion of the annular portion 44 . The inner claw 46 is formed in a rectangular shape, and is inclined radially inward toward a direction away from the annular portion 44 (arrow OUT direction; a direction in which the wall-penetrating joint 10 is inserted into the mounting hole 14, which will be described later).

The diameter φ3 of the imaginary inscribed circle FC1 passing through the inner peripheral ends of the plurality of inner claws 46 is smaller than the outer diameter φ1 (see FIG. 3) of the hook portion 42A of the boss 42. It is formed to have approximately the same diameter as φ2 (or a slightly smaller diameter).

A plurality of outer claws 48 (in this embodiment, four at 90° intervals) are formed along the circumferential direction on the outer peripheral portion of the annular portion 44 so as to protrude inward (in the direction of the arrow OUT) of the mounting hole 14 . It is

As shown in FIG. 4, the outer claw 48 in a free state (not inserted into the mounting hole 14 and not deformed) has a base portion 48A extending vertically from the annular portion 44 along the axial direction of the annular portion 44. and a hooking portion 48B that is bent radially outward from the tip of the base portion 48A and obliquely toward the annular portion 44 side.

As shown in FIG. 4A, the diameter φ4 of the imaginary circumscribed circle FC2 passing through the tips 48E of the plurality of outer claws 48 is set slightly larger than the inner diameter φ5 of the mounting hole 14 (see FIG. 1). Therefore, when the outer claw 48 of the annular portion 44 is inserted into the mounting hole 14 as shown in FIG. elastically deformed. Since the outer claw 48 attempts to return to its original shape by its own elasticity, the tip 48E of the outer claw 48 presses the inner peripheral wall of the mounting hole 14 .

As shown in FIG. 1, the second nut 24 is arranged on the surface side of the wall 12 (in the direction of the arrow OUT). A joint body 16 is fixed to the wall 12 .

(Procedure for mounting the through-wall joint 10)
Next, a procedure for attaching the wall-penetrating joint 10 to the wall 12 will be described.
(1) A mounting hole 14 is formed in the wall 12 using a hole saw or the like (an example of a mounting hole forming process).

(2) The first nut 18 is screwed onto the male screw 26 of the joint body 16 , and the first nut 18 is arranged in the vicinity of the hexagonal nut portion 38 .

(3) The tubular member of the joint main body 16 is positioned so that the tip 46E of the inner claw 46 of the holding member 22 overcomes the hooking portion 42A formed on the boss 42 of the first nut 18 and comes into contact with the outer peripheral portion of the boss 42. 30 is inserted into the retaining member 22 from the non-projecting side of the inner and outer claws 46,48. Thereby, the holding member 22 is held between the annular portion 44 and the hook portion 42A on the outer peripheral portion of the boss 42 .

(4) The tubular member 30 of the joint body 16, to which the holding member 22 and the first nut 18 are attached, is inserted into the annular waterproof member 20, and the joint to which the holding member 22 and the first nut 18 are attached is inserted. The main body 16 is inserted into the mounting hole 14 from the cylindrical member 30 side. A water stop member 20 is arranged on the wall 12 side of the first nut 18 so that the water stop member 20 is interposed between the first nut 18 and the wall 12 when the joint body 16 is inserted.

In the process of inserting the holding member 22 into the mounting hole 14, the tip 48E of the outer claw 48 is pressed against the inner peripheral surface of the mounting hole 14 and is elastically deformed radially inward. It moves inside the mounting hole 14 while sliding. The joint main body 16 is inserted until the first nut 18 comes into contact with the wall 12 via the waterproof member 20 .

When the insertion is completed, the tips 48E of the four outer claws 48 of the holding member 22 are pressing against the inner peripheral surface of the mounting hole 14, and there is a gap between the tips 48E of the outer claws 48 and the inner peripheral surface of the mounting hole 14. Since a large frictional force acts on the holding member 22, the holding member 22 is coaxially and reliably held (in other words, temporarily fixed or temporarily fixed) in the mounting hole 14. As shown in FIG. In addition, since the tips 46E of the four inner claws 46 of the holding member 22 are in contact with the outer peripheral surface of the boss 42, the joint body 16 to which the first nut 18 is attached is coaxial with the mounting hole 14 by the holding member 22. target and securely held.

The work of inserting the joint body 16 into the mounting hole 14 described above can be performed by a single operator from one side (the direction of the arrow IN) of the wall 12, and the joint body 16 can be installed on the wall without using any tools. 12 ((2) to (4) above are examples of the joint holding process)

(5) Next, the operator screws the second nut 24 onto the male screw 26 of the cylindrical member 30 protruding from the wall 12 on the other side (arrow OUT direction side) of the wall 12 to The nut 24 is tightened using a tool such as a spanner. Since the joint body 16 is held by the wall 12 , the work of screwing the second nut 24 onto the male thread 26 and the work of tightening can be performed by one worker on the other side of the wall 12 . Then, by tightening the second nut 24 and sandwiching the wall 12 between the first nut 18 and the second nut 24, the joint body 16 is fixed to the wall 12 (an example of a fixing process).

Thus, the through-wall joint 10 of this embodiment can be easily attached to the attachment hole 14 of the wall 12 by one worker without using screws or drivers.

The through-wall joint 10 is held in the mounting hole 14 by the holding member 22, and the wall 12 is sandwiched between the first nut 18 and the second nut 24 to fix it. For example, it is difficult to firmly fix a screw to a wall, such as a gypsum board, and it is possible to fix the wall securely even if the screw thread is easily crushed or cracked. In addition, the through-wall joint 10 does not need to process the wall 12 with a pilot hole into which a screw is screwed.

Furthermore, in the through joint 10 of the present embodiment, the outer claws 48 of the holding member 22 can be elastically deformed to some extent in the radial direction. It can be held in hole 14 . By lengthening the outer claws 48, it is possible to increase the amount of deformation of the outer claws 48 in the radial direction.

The gap between the mounting hole 14 and the cylindrical member 30 may be filled with a sealing material before tightening the second nut 24 . By filling the gap between the mounting hole 14 and the tubular member 30 with a sealing material to fill the gap, water or the like flows through the gap from one side of the wall 12 to the other side or the other side of the wall 12. is blocked from moving to one side.

[Second embodiment]
A through-wall joint 10 according to a first embodiment of the present invention will be described with reference to FIGS. 5 to 8. FIG. In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and the description is abbreviate|omitted.

As shown in FIGS. 5, 6, and 8, the through-wall joint 10 of this embodiment includes a first nut 50 having a different shape from the first nut 18 of the first embodiment, and a first A holding member 52 having a shape different from that of the holding member 22 of the embodiment is used.

As shown in FIGS. 5 and 6, the first nut 50 of the present embodiment has a boss 54 formed with a constant diameter along the axial direction (the shape without the hooking portion 42A of the first embodiment). Its outer diameter is slightly smaller than that of the mounting hole 14 . A chamfer 56 is formed at the corner of the boss 54 .

As shown in FIGS. 6 and 8, the holding member 52 of the second embodiment is formed of a thin metal plate, has an inner diameter larger than that of the male screw 26, and an outer diameter larger than that of the mounting hole 14. An annular portion 58 having a smaller diameter than the inner diameter is provided.

A plurality (four in this embodiment) of inner claws 60 protruding radially inward are formed along the inner peripheral portion of the annular portion 58 along the circumferential direction.

The diameter φ6 of the imaginary inscribed circle FC3 passing through the tips 62E on the inner peripheral side of the plurality of inner claws 60 is smaller than the outer diameter of the male screw 26 of the cylindrical member 30 and larger than the root diameter of the male screw 26. It is formed with a large diameter, and the tip is inserted into the valley of the male screw 26 . In other words, if the holding member 52 is likened to a nut, the inner claws 60 serve as the ridges of the female thread of the nut. Therefore, the holding member 52 can be moved in the axial direction of the male screw 26 by relatively rotating the male screw 26 while the rotation of the holding member 52 is blocked.

A plurality of outer claws 62 (in this embodiment, four at intervals of 90°) are formed on the outer peripheral portion of the annular portion 58 so as to protrude radially outward. As shown in FIGS. 5 and 6 , the outer claw 62 is inclined toward the boss 54 of the first nut 50 .

The diameter φ7 of the imaginary circumscribed circle FC4 passing through the tips 62E on the outer peripheral side of the plurality of outer claws 62 is substantially the same as the inner diameter φ5 of the mounting hole 14, and the outer diameter φ8 of the boss 54 of the first nut 50 (Fig. 7), and the inner surface of the outer claw 62 is brought into contact with the chamfer 56 formed at the corner of the boss 54 .

(Procedure for mounting the through-wall joint 10)
Next, a procedure for attaching the wall-penetrating joint 10 according to the second embodiment to the wall 12 will be described.
(1) A mounting hole 14 is formed in the wall 12 using a hole saw or the like (an example of a mounting hole forming process).

(2) Screw the first nut 50 onto the male thread 26 of the joint body 16 and place the first nut 50 in the vicinity of the hexagonal nut portion 38 .

(3) Screw the holding member 52 onto the male thread 26 of the joint body 16 .

(4) The tubular member 30 of the joint body 16 to which the first nut 50 and the holding member 52 are attached is inserted into the annular waterproof member 20, and the joint to which the first nut 50 and the holding member 52 are attached is inserted. Body 16 is inserted into mounting hole 14 . The water stop member 20 is arranged on the wall 12 side of the first nut 50 so that the water stop member 20 is interposed between the first nut 50 and the wall 12 when the joint body 16 is inserted.

When the first nut 50 is pressed against the wall 12 via the waterproof member 20 , the boss 54 of the first nut 50 and the holding member 52 are positioned inside the mounting hole 14 , and the first nut 50 is pressed against the wall 12 . , the joint body 16 is rotated to move the holding member 52 screwed to the male screw 26 toward the boss 54 of the first nut 50 .

When the above movement is continued, the inside of the outer claws 62 of the holding member 52 is pressed by the chamfered portions 56 at the corners of the boss 54, and the four outer claws 62 are each elastically deformed radially outward (in other words, four The outer claws 62 open radially outward), and the tip 62E of each outer claw 62 is pressed against the inner peripheral surface of the mounting hole 14 (bites into the inner peripheral surface in some cases).

The tip 62</b>E of each outer claw 62 presses or bites into the inner peripheral surface of the mounting hole 14 , so that the joint body 16 with the holding member 52 attached thereto is coaxially held in the mounting hole 14 .
The work of inserting the joint body 16 into the mounting hole 14 described above can be performed by a single operator from one side (the direction of the arrow IN) of the wall 12, and the joint body 16 can be installed on the wall without using any tools. 12 ((2) to (4) above are examples of the joint holding process)

(5) Next, the second nut 24 is screwed onto the male thread 26 of the cylindrical member 30 protruding from the wall 12 on the other side of the wall 12 (arrow OUT direction side), and the second nut 24 is tightened with a wrench. Tighten using a tool such as Since the joint body 16 is held by the wall 12 , the work of screwing the second nut 24 onto the male thread 26 and the work of tightening can be performed by one worker on the other side of the wall 12 . Then, the joint body 16 is fixed to the wall 12 by tightening the second nut 24 and sandwiching the wall 12 between the first nut 50 and the second nut 24 (an example of a fixing process).

Thus, the through-wall joint 10 of this embodiment can be easily attached to the attachment hole 14 of the wall 12 by one worker without using screws or drivers.

The wall-penetrating joint 10 is held in the mounting hole 14 by the holding member 52, and the wall 12 is sandwiched between the first nut 50 and the second nut 24 for fixing. For example, it is difficult to firmly fix a screw such as a gypsum board, and a wall whose screw threads are easily crushed can be securely fixed. Further, the through-wall joint 10 of the present embodiment does not need to process the wall 12 with a pilot hole into which a screw is screwed.

Furthermore, in the through joint 10 of the present embodiment, the outer claws 62 of the holding member 52 can be elastically deformed to some extent in the radial direction. It can be held in hole 14 . If the outer claws 62 are lengthened, the amount of radial deformation of the outer claws 62 can be increased.

The gap between the mounting hole 14 and the cylindrical member 30 may be filled with a sealing material before tightening the second nut 24 .

[Other embodiments]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and it goes without saying that various modifications can be made in addition to the above without departing from the scope of the invention. is.

The wall-penetrating joint 10 of the above-described embodiment is provided with a pipe connection portion 32, which is a one-touch joint, on one end side of the cylindrical member 30. However, the pipe connection portion 32 can A well-known connection structure such as a male screw formed on the outer circumference or the inner circumference of the cylindrical member 30 can be used without being limited to the joint.

In the first embodiment, the first nut 18 and the holding member 22 are separate members, but the holding member 22 may be integrated with the first nut 18 .

Although the holding member 22 and the holding member 52 of the above-described embodiment are formed of thin metal plates, if the through-wall joint 10 can be held in the mounting hole 14, the material may be a synthetic resin material other than a metal material. may be Also, the first nuts 14 and 50 and the second nut 24 are not limited to metallic materials, and may be made of a material other than metallic materials such as synthetic resin.

REFERENCE SIGNS LIST 10 Wall Penetration Joint 18 First Nut 22 Holding Member 24 Second Nut 42 Boss 46 Inner Claw (Inner Locking Portion)
48 outer claw (outer locking portion)
50 First Nut 52 Holding Member 54 Boss 60 Inner Claw (Inner Locking Portion)
62 outer claw (outer locking portion)

Claims (4)

a joint body having a male thread formed on the outer peripheral portion and passing through a mounting hole formed in the wall;
a first nut disposed on one side of the wall and screwed onto the male screw;
a second nut disposed on the other side of the wall and screwed onto the male screw;
a holding member that is disposed between the mounting hole and the joint body and presses the joint body and the mounting hole in a radial direction to hold the joint body in the mounting hole;
has
The first nut has a convex boss inserted into the mounting hole formed on the inner peripheral side,
The holding member includes an inner locking portion locked to the outer circumference of the boss or the outer circumference of the joint body, and an outer locking portion locked to the inner peripheral surface of the mounting hole,
Further, the holding member has a plurality of outer locking portions formed on an outer peripheral portion thereof so as to be elastically deformable in a radial direction of the holding member,
The diameter of a virtual circumscribed circle passing through the radially outer end of each of the outer locking portions in the free state is set larger than the inner diameter of the mounting hole.
through-wall fittings. a joint body having a male thread formed on the outer peripheral portion and passing through a mounting hole formed in the wall;
a first nut disposed on one side of the wall and screwed onto the male screw;
a second nut disposed on the other side of the wall and screwed onto the male screw;
a holding member that is disposed between the mounting hole and the joint body and presses the joint body and the mounting hole in a radial direction to hold the joint body in the mounting hole;
has
The first nut has a convex boss inserted into the mounting hole formed on the inner peripheral side,
The holding member includes an inner locking portion locked to the outer circumference of the boss or the outer circumference of the joint body, and an outer locking portion locked to the inner peripheral surface of the mounting hole,
A plurality of the inner locking portions are provided on the inner peripheral portion of the holding member, and each radially inner end is screwed to the male screw,
A plurality of the outer locking portions are provided on the outer peripheral portion of the holding member, and are inclined such that the radially outer side is positioned closer to the boss than the radially inner side, and the radially inner side surface is located on the first nut. By contacting and pressing against the boss, the radially outer end is elastically deformed radially outward, and the radially outer end is pressed against the inner peripheral surface of the mounting hole.
through-wall fittings. A method for installing a through-wall joint according to claim 1 or claim 2,
a mounting hole forming step of forming in the wall a mounting hole into which a joint body having a male thread formed on the outer peripheral portion is inserted;
A holding member is attached to lock the joint body in the mounting hole, and the joint body, in which a first nut is screwed onto the male screw, is inserted from one side of the wall to insert the joint body into the mounting hole. a joint holding step to be locked;
a fixing step of screwing a second nut onto the male screw projecting to the other side of the wall, and fixing the joint body to the wall by sandwiching the wall between the first nut and the second nut;
A method of installing a through-wall joint having a 4. The through-wall joint according to claim 3 , further comprising a filling step of filling a gap between the mounting hole and the through-wall joint with a sealing material between the joint holding step and the fixing step. Mounting method.