JP7132181B2 - Joint structure and fittings - Google Patents

Description

TECHNICAL FIELD The present invention relates to a joining structure and fittings for joining two shaped members constituting a window frame or the like.

Conventionally, there is known a joining structure in which the vertical frame and the horizontal frame are joined together by screws with a sealing material sandwiched between the longitudinal end surfaces of the vertical frame and the horizontal frame (see, for example, Patent Document 1). ).
In the joint structure described in Patent Document 1, the vertical frame, the horizontal frame and the sealing material have the following configurations.
The vertical frame is provided with a first insertion hole through which a screw is inserted, and a protrusion projecting from the periphery of the first insertion hole toward the horizontal frame and having a flat tip. Further, the sealing material is provided with a second insertion hole through which the screw is inserted. Furthermore, the horizontal frame is provided with a threaded portion into which the threaded portion of the screw inserted through the first and second insertion holes is screwed. Then, when a screw is inserted through the first and second insertion holes and the threaded portion of the screw is screwed into the threaded portion, the vertical frame and the horizontal frame are positioned between the tip of the projection and the horizontal frame. They are joined together with a sealing material interposed therebetween.

Japanese Utility Model Laid-Open No. 57-174681

However, in the joint structure described in Patent Document 1, the tip of the projection and the horizontal frame are unnecessarily separated from each other due to the elastic repulsive force of the sealing material interposed between the tip of the projection and the horizontal frame. becomes easier. That is, there is a problem that the necessary amount of compression of the sealing material cannot be ensured, and the waterproof performance cannot be sufficiently exhibited.

SUMMARY OF THE INVENTION An object of the present invention is to provide a joining structure and fittings capable of sufficiently exhibiting water stopping performance in view of the above circumstances.

In order to achieve the above object, the joint structure according to the present invention provides a joining structure in which a seal material is sandwiched between a longitudinal end surface of a first shape member and a second shape member, and the first shape member is joined by a screw. and a joint structure for joining the second shape members together, wherein the first shape member is provided with a first insertion hole through which the screw is inserted, and the seal member includes the screw. A second through-hole is provided, and the second shaped member is screwed with a screw portion of the screw inserted through the first through-hole and the second through-hole. A junction is provided, and one of the first and second profiles protrudes toward the other of the first and second profiles. A projecting portion is provided, and the projecting portion comprises a base portion projecting toward the other shape member, and a deformation portion projecting from the tip of the base portion toward the other shape member and being crushed by the fastening force of the screw. It is characterized by having

Further, in the joining structure according to the present invention, the first shape member and the second shape member are joined by screws with a sealing material sandwiched between the longitudinal end surfaces of the first shape member and the second shape member. In the joining structure for joining shape members, the first shape member includes a first insertion hole through which the screw is inserted, and the second insertion hole extending toward the central axis of the first insertion hole. The sealing member is provided with a second insertion hole through which the screw is inserted, and the second profile is provided with the first insertion hole and a threaded portion into which the threaded portion of the screw inserted through the second insertion hole is screwed, and the tip of the protrusion approaches the seat surface of the screw due to the fastening force of the screw. , and the distal end abuts against the threaded portion.

A fitting according to the present invention includes a first shape member, a second shape member, and a sealing material sandwiched between the longitudinal end surfaces of the first shape member and the second shape member. , wherein the first shape member and the second shape member are joined to each other by the joining structure described above.

ADVANTAGE OF THE INVENTION According to the joining structure and fittings which concern on this invention, water stopping performance can fully be exhibited.

1 is a perspective view showing a part of fittings according to Embodiment 1. FIG. FIG. 2 is an exploded perspective view of a part of the fittings shown in FIG. 1 ; It is a figure which shows a 1st insertion hole and a projection part. It is a figure which shows a 1st insertion hole and a projection part. It is a figure explaining the joining method which joins a lower frame and vertical frames. It is the figure which looked at the junction part of a lower frame and a vertical frame from the outer side of the said vertical frame. FIG. 10 is a diagram showing a first insertion hole and projections according to Embodiment 2; FIG. 10 is a diagram showing a first insertion hole and projections according to Embodiment 2; FIG. 10 is a diagram for explaining a joining method according to Embodiment 2; FIG. 10 is a diagram showing a first insertion hole and projections according to Embodiment 3; FIG. 10 is a diagram showing a first insertion hole and projections according to Embodiment 3; It is a figure explaining the joining method which concerns on Embodiment 3. FIG.

EMBODIMENT OF THE INVENTION Below, with reference to drawings, the form (henceforth, embodiment) for implementing this invention is demonstrated. It should be noted that the present invention is not limited by the embodiments described below. Furthermore, in the description of the drawings, the same parts are given the same reference numerals.

(Embodiment 1)
[Schematic configuration of fittings]
FIG. 1 is a perspective view showing a part of fittings 1 according to the first embodiment. FIG. 2 is an exploded perspective view in which a part of the fitting 1 shown in FIG. 1 is exploded.
In addition, the "prospect direction" described below is the direction along the depth of the fitting 1 (direction of arrow Ar in FIGS. 1 and 2). A plane along the projection direction may be called a projection plane, and a plane orthogonal to the projection direction may be called a projection plane.
In Embodiment 1, a joint structure according to the present invention will be described by taking as an example a fitting 1 for a bathroom provided with a frame 2 for supporting a folding door (not shown) provided at a doorway of a bathroom.

The frame 2 surrounds each frame member of an upper frame (not shown), a lower frame 3, a vertical frame (not shown) on the left side when viewed from the bathroom side, and a vertical frame 4 on the right side when viewed from the bathroom side. Consists of Each of the frame members is made of a metal such as aluminum or an extruded shape made of resin, and has substantially the same cross-sectional shape over the entire length.
Below, for convenience of explanation, as a joint structure according to the present invention, a joint structure for joining the lower frame 3 and the vertical frame 4 together will be mainly described. Here, the lower frame 3 corresponds to the second shape member according to the present invention. Also, the vertical frame 4 corresponds to the first shape member according to the present invention. In addition, the “inner side” described below means the side of the vertical frame 4 that is adjacent to the other vertical frame. Further, the “outside” described below means the side of the vertical frame 4 that is separated from the other vertical frame.

The lower frame 3 and the vertical frame 4 are fixed together by two screws 6 (FIG. 2) with the sealing material 5 sandwiched between the longitudinal end surface 31 of the lower frame 3 and the inner projection surface 41a of the vertical frame 4. spliced.
The lower frame 3 includes a lower frame surface portion 32 , a hollow forming portion 33 , a vertical wall portion 34 and two threaded portions 35 .
In the lower frame surface portion 32, a rail 32a on which the folding door is guided, and a molded waterproof member (not shown) that is recessed downward on the dressing room side of the rail 32a are fitted to the upper side of the lower frame surface portion 32. A fitting groove 32b is provided.
The hollow forming portion 33 is positioned below the lower frame surface portion 32 and provided so as to cover the fitting groove 32b. The hollow forming portion 33 forms a hollow portion 36 communicating with the lower frame surface portion 32 along the longitudinal direction of the lower frame 3 .
The hanging wall portion 34 is a portion that hangs downward from the edge of the lower frame surface portion 32 on the bathroom side.

The two threaded portions 35 are provided on the projection surface on the lower side of the lower frame surface portion 32 . More specifically, one of the two threaded portions 35 is provided under the bottom portion 32c of the fitting groove 32b, that is, inside the hollow portion 36 . The other threaded portion 35 is provided outside the hollow portion 36 and near the vertical wall portion 34 .
These threaded portions 35 have the same configuration. Specifically, the threaded portion 35 is composed of two extension pieces 35a extending downward with a space therebetween in the projection direction. These two extension pieces 35a form arcuate shapes that bulge and curve in opposite directions in the projection direction. There is a gap between the tips of the two extension pieces 35a.

The vertical frame 4 extends along the projection direction and forms a projection surface 41a, and the projection wall portion 41 extends along the vertical direction on the projection surface 41a and faces the unfolded folding door on the dressing room side. A facing piece 42 is provided.
The projected wall portion 41 is provided with two first insertion holes 43 and four protrusions 44 (FIG. 2).
3 and 4 are diagrams showing the first insertion hole 43 and the protrusion 44. FIG.
The first insertion hole 43 and the protrusion 44 are simultaneously formed by press working using a die having a punched portion forming the first insertion hole 43 and a projecting portion forming the protrusion 44 . In Embodiment 1, as shown in FIGS. 3 and 4, one first insertion hole 43 and two protrusions 44 are formed at the same time.

The two first insertion holes 43 are holes through which the two screws 6 are respectively passed through the front and back of the prospective wall portion 41 . These first insertion holes 43 are provided at positions facing the two threaded portions 35 respectively.
The four protrusions 44 are protrusions that protrude inward from the projected surface 41a. Of the four projections 44, two projections 44 are provided on both sides in the prospective direction with one of the two first insertion holes 43 interposed therebetween, and are connected to two threaded portions. It is provided at a position facing each of the two extension pieces 35a forming one of the threaded portions 35 of 35. As shown in FIG. The other two projections 44 are provided on both sides of the other first insertion hole 43 in the prospective direction, and face the two extension pieces 35a constituting the other screw engagement portion 35, respectively. It is set in a position where The four protrusions 44 are provided at positions not facing the lower frame surface portion 32 including the bottom portion 32c.

These protrusions 44 have the same configuration. Specifically, the projecting portion 44 includes a base portion 45 and a deformation portion 46 .
The base portion 45 is a portion protruding inward from the projection surface 41a. The base portion 45 has a first extension surface 451 formed by extending the inner peripheral surface of the first insertion hole 43 on its side surface.
The deformed portion 46 is a portion that protrudes inward from the entire tip end region of the base portion 45 and is a portion that is crushed by the fastening force of the screw 6 when the lower frame 3 and the vertical frame 4 are joined together. The deformed portion 46 has a second extended surface 461 formed by extending the first extended surface 451 and an inclined surface 462 toward the center axis Ax ( FIG. 4 ) of the first insertion hole 43 toward the inner side. and are formed in a substantially triangular prism shape extending in the vertical direction.
The projecting portion 44 according to the first embodiment has a generally triangular prism shape extending in the vertical direction as a whole.

The sealing material 5 is sheet-like and made of a soft material such as butyl rubber. The sealing material 5 has a shape larger than the edge forming the contour of the end surface 31 of the lower frame 3 (including the waterproof member fitted in the fitting groove 32b) over the entire circumference. Also, the sealing member 5 is provided with two second insertion holes 51 that pass through the front and back, and through which the two screws 6 are respectively inserted (FIG. 2). These second insertion holes 51 are provided at positions facing the two threaded portions 35 and the two first insertion holes 43 respectively. Here, the inner diameter dimension of the second insertion hole 51 is set to be substantially the same as the distance between the second extended surfaces 461 of the two protrusions 44 provided around one first insertion hole 43. It is

[Joining method]
Next, a joining method for joining the lower frame 3 and the vertical frame 4 together will be described.
FIG. 5 is a diagram illustrating a joining method for joining the lower frame 3 and the vertical frame 4 together. Concretely, FIG. 5 is a figure which shows typically the cross section of the joining structure which joins the lower frame 3 and the vertical frame 4 comrades. FIG. 6 is a view of the joint portion of the lower frame 3 and the vertical frame 4 viewed from the outside of the vertical frame 4. As shown in FIG.
First, an operator inserts the sealing material 5 between the end surface 31 of the lower frame 3 and the projection surface 41a so that the first and second insertion holes 43, 51 and the threaded portion 35 face each other. between Then, the operator inserts the screw 6 through the first and second insertion holes 43 and 51 from the outside to the inside of the vertical frame 4 and screws the threaded portion 61 of the screw 6 into the threaded portion 35 . (Fig. 5(a)). In the temporarily fixed state ( FIG. 5A ) before the screw 6 is tightened to the threaded portion 35 , the sealing material 5 is interposed between the protrusion 44 and the threaded portion 35 . Moreover, the protrusion 44 is positioned within a projection area Sp obtained by projecting the bearing surface 62 of the screw 6 in the longitudinal direction of the lower frame 3 .

Next, the operator tightens the screw 6 to the threaded portion 35 .
As the screw 6 is tightened to the threaded portion 35 , the distal end of the deformed portion 46 enters the second insertion hole 51 , and the inclined surface 462 moves the edge of the second insertion hole 51 along the central axis Ax. is displaced in the direction away from Also, the deformation portion 46 is crushed by the fastening force of the screw 6 (FIG. 5(b)). On the other hand, the base portion 45 is not crushed by the fastening force of the screw 6 (FIG. 5(b)). In the state after the screw 6 is tightened to the threaded portion 35 (FIG. 5(b)), the sealing material 5 extends from between the base portion 45 and the threaded portion 35. 35 are pushed away to a position where they do not face each other. Then, the base portion 45 and the threaded portion 35 are brought into contact with each other. Also, the sealing material 5 is compressed between the end surface 31 of the lower frame 3 and the projected surface 41a. A portion where the sealing material 5 is compressed by the lower frame surface portion 32 (including the portion forming the fitting groove 32b) forms a water stop line LN (see the thick line in FIG. 6).

(Embodiment 2)
Next, Embodiment 2 will be described.
In the following description, the same reference numerals are given to the same configurations as in Embodiment 1, and the detailed description thereof will be omitted or simplified.
7 and 8 are diagrams showing the first insertion hole 43 and the protrusion 44A according to the second embodiment. Specifically, FIGS. 7 and 8 are diagrams corresponding to FIGS. 3 and 4, respectively.
In the second embodiment, a protrusion 44A having a shape different from that of the protrusion 44 is adopted as compared with the first embodiment described above.

Projection 44A differs from projection 44 described in the first embodiment above only in that the shape of deformable portion 46 is changed. Below, for convenience of explanation, the deformable portion 46 according to the second embodiment is referred to as a deformable portion 46A.
The deformation portion 46A protrudes inward from a partial region of the tip of the base portion 45 . That is, like the deformable portion 46, the deformable portion 46A has a second extended surface 461 and an inclined surface 462, and is formed in a substantially triangular prism shape extending in the vertical direction. Further, the other region of the tip of the base portion 45 is a flat surface 452 in which the region other than the region where the deformation portion 46A is provided is exposed to the outside.

Next, a joining method according to the second embodiment will be described.
FIG. 9 is a diagram showing a joining method according to the second embodiment. Specifically, FIG. 9 is a sectional view corresponding to FIG.
The operator sets the temporarily fixed state ( FIG. 9A ) in the same manner as in the first embodiment described above, and then tightens the screw 6 to the threaded portion 35 .
As the screw 6 is tightened to the threaded portion 35, the sealing material 5 and the deformation portion 46A are brought into the same state as in the first embodiment (FIG. 9(b)). That is, the deformed portion 46A has its tip end inserted into the second insertion hole 51, and displaces the edge portion of the second insertion hole 51 by the inclined surface 462 in a direction away from the central axis Ax. Further, the deformation portion 46A is crushed by the fastening force of the screw 6. As shown in FIG. Then, the sealing material 5 is pushed out from between the base portion 45 and the threaded portion 35 to a position where the base portion 45 and the threaded portion 35 do not face each other. Further, the base portion 45 (flat surface 452) and the threaded portion 35 are in contact with each other.

(Embodiment 3)
Next, the third embodiment will be described.
In the following description, the same reference numerals are given to the same configurations as in Embodiment 1, and the detailed description thereof will be omitted or simplified.
10 and 11 are diagrams showing the first insertion hole 43 and projection 44B according to the third embodiment. Specifically, FIGS. 10 and 11 are diagrams corresponding to FIGS. 3 and 4, respectively.
In the third embodiment, a protrusion 44B having a shape different from that of the protrusion 44 is adopted as compared with the first embodiment described above.

The projecting portion 44B is a portion formed by cutting and bending, and is inclined toward the end surface 31 of the lower frame 3 toward the central axis Ax (FIG. 11). The proximal end portion of the projecting portion 44B is deformed by the fastening force of the screw 6 when the lower frame 3 and the vertical frame 4 are joined together. In addition, the separation dimension between the tips of the two projections 44B provided in one first insertion hole 43 before the deformation is set smaller than the inner diameter dimension of the first insertion hole 43. (Fig. 11). In addition, the inner diameter dimension of the second insertion hole 51 is set to be substantially the same as the distance between the tips of the two protrusions 44B provided in one first insertion hole 43 before the deformation. .

Next, a joining method according to the third embodiment will be described.
FIG. 12 is a diagram for explaining the joining method according to the third embodiment. Specifically, FIG. 12 is a sectional view corresponding to FIG.
The operator sets the temporarily fixed state (FIG. 12(a)) in the same manner as in the first embodiment described above, and then tightens the screw 6 to the threaded portion 35 .
As the screw 6 is tightened to the threaded portion 35, the tip of the protrusion 44B enters the second insertion hole 51, and the elastic repulsive force from the seal 5 is centered by the surface 47 on the seal 5 side. Release to the side away from the axis Ax. Moreover, the proximal end portion of the projecting portion 44B is deformed so that the distal end approaches the seat surface 62 due to the fastening force of the screw 6, and the distal end contacts the screw portion 61 (FIG. 12(b)). As a result, the screw 6 can no longer be tightened to the threaded portion 35 .

(Other embodiments)
Although the embodiments for carrying out the present invention have been described so far, the present invention should not be limited only to the above-described embodiments.
In the first to third embodiments described above, an example in which the joining structure according to the present invention is applied to joining the lower frame 3 and the vertical frame 4 of the frame body 2 constituting the fitting 1 for the bathroom has been described. Not exclusively. For example, fittings according to the present invention may not be for bathrooms. Further, for example, the joint structure according to the present invention may be applied to joints between upper frames and vertical frames or joints between vertical frames and horizontal frames.

In Embodiments 1 and 2 described above, the protrusions 44 and 44A according to the present invention were provided on the vertical frame 4, which is the first shape member according to the present invention. It may be provided on the lower frame 3 which is the second shape member.
In addition, in the first and second embodiments described above, the inclined surface 462 according to the present invention is inclined toward the center axis Ax of the first insertion hole 43 as it goes inward, but it is not limited to this. As long as it is possible to push the sealing material 5 out from between the base portion 45 and the threaded portion 35, the inclined surface may be inclined in other directions.

In the joining structure according to the present invention, the first shape member and the second shape member are joined by screws with a sealing material sandwiched between the longitudinal end surfaces of the first shape member and the second shape member. In the joint structure for joining together, the first shaped member is provided with a first insertion hole through which the screw is inserted, and the seal member is provided with a second insertion hole through which the screw is inserted. a hole is provided, and the second shaped member is provided with a threaded portion into which the threaded portion of the screw inserted through the first insertion hole and the second insertion hole is screwed, One of the first shape and the second shape is provided with a protrusion projecting toward the other of the first shape and the second shape, The protruding portion has a base portion protruding toward the other shape member, and a deforming portion that protrudes from the tip of the base portion toward the other shape member and is crushed by the fastening force of the screw.

In the following, for convenience of explanation, an example in which the projection is provided on the first of the first and second shapes will be described.

According to the present invention, when the screw is tightened to the threaded portion, the deformation portion is crushed by the fastening force of the screw, and the base portion and the threaded portion are separated from the base portion and the threaded portion. Push the sealing material away from the opposite position. On the other hand, the base is not crushed by the tightening force of the screw. Then, the base portion and the threaded portion are brought into contact with each other.
That is, since no sealing material is interposed between the base portion and the threaded portion, the elastic repulsive force of the sealing material does not act between the base portion and the threaded portion. Therefore, a sufficient amount of compression of the sealing material can be ensured, and the waterproof performance can be sufficiently exhibited.
In particular, if the screw is tightened to the threaded portion until the deformed portion is crushed, the first and second shaped members can be joined together, so it is possible to control the amount of compression of the sealing material to a constant level. Become.

Further, according to the present invention, in the joint structure described above, the deformation portion has an inclined surface that is inclined with respect to the longitudinal direction.
According to the present invention, since the deformation portion has the above-described inclined surface, in the process of tightening the screw to the threaded portion, the inclined surface causes the base portion and the threaded portion to move from between the base portion and the threaded portion. The sealing material can be effectively pushed out to a position where it does not face the threaded portion.

Further, according to the present invention, in the joining structure described above, when the screw is tightened to the threaded portion, the deformed portion has the inclined surface that pushes the edge portion of the second insertion hole away from the threaded portion. It is characterized in that it is displaced in the direction of separation.
In the present invention, the deformable portion pushes the sealing material away from between the base portion and the threaded portion by displacing the edge portion of the second insertion hole in the direction away from the threaded portion by means of the inclined surface. Therefore, the sealing material is not damaged, and the waterproof performance can be sufficiently ensured.

Further, according to the present invention, in the joining structure described above, a flat surface is provided at the tip of the base portion, and the deformation portion protrudes from a partial region of the flat surface toward the other shape member. characterized by
According to the present invention, depending on the position of the flat surface, it is possible to clarify the position at which the base portion (flat surface) and the threaded portion abut when the first and second shaped members are joined together. Become. That is, it is possible to clearly define the amount of compression of the sealing material.

Further, in the joining structure according to the present invention, the first shape member and the second shape member are joined by screws with a sealing material sandwiched between the longitudinal end surfaces of the first shape member and the second shape member. In the joining structure for joining shape members, the first shape member includes a first insertion hole through which the screw is inserted, and the second insertion hole extending toward the central axis of the first insertion hole. The sealing member is provided with a second insertion hole through which the screw is inserted, and the second profile is provided with the first insertion hole and a threaded portion into which the threaded portion of the screw inserted through the second insertion hole is screwed, and the tip of the protrusion approaches the seat surface of the screw due to the fastening force of the screw. , and the distal end abuts against the threaded portion.

According to the present invention, when the screw is tightened to the threaded portion, the projection separates the elastic repulsive force from the sealing material from the central axis of the first insertion hole by the inclined surface on the sealing material side. escape to the side. Also, the protruding portion deforms at the proximal end so that the tip approaches the seating surface of the screw, and the tip abuts the threaded portion.
That is, since the elastic repulsive force of the sealing material between the protrusion and the threaded portion is released to the side away from the central axis of the first insertion hole, the amount of compression of the sealing material can be sufficiently secured. It is possible to fully demonstrate the water stopping performance.
In particular, when the tip of the protrusion comes into contact with the threaded portion, the threaded portion cannot be tightened any further. In other words, if the screw can no longer be tightened to the threaded portion, the first and second shaped members can be joined together, so that the amount of compression of the sealing material can be controlled to be constant. It becomes possible.

A fitting according to the present invention includes a first shape member, a second shape member, and a sealing material sandwiched between the longitudinal end surfaces of the first shape member and the second shape member. , wherein the first shape member and the second shape member are joined to each other by the joining structure described above.
In the fitting according to the present invention, since the first and second shape members are joined together by the joint structure described above, the same functions and effects as those of the joint structure described above can be obtained.

1 fitting, 3 lower frame (second shape), 4 vertical frame (first shape), 5 sealing material, 6 screw, 31 end surface, 35 screw engagement portion, 43 first insertion hole, 44, 44A, 44B protrusion, 45 base, 46, 46A deformed portion, 51 second insertion hole, 61 threaded portion, 62 bearing surface, 452 flat surface, 462 inclined surface, Ax central axis

Claims (6)

A joint structure in which the first shape member and the second shape member are joined together by screws with a sealing material sandwiched between the longitudinal end faces of the first shape member and the second shape member. hand,
In the first shape,
A first insertion hole through which the screw is inserted is provided,
The sealing material includes
A second insertion hole through which the screw is inserted is provided,
In the second shape,
a threaded portion into which the threaded portion of the screw inserted through the first insertion hole and the second insertion hole is screwed;
In one of the first shape and the second shape,
A protrusion projecting toward the other shape member of the first shape member and the second shape member is provided,
The protrusion is
a base projecting toward the other profile;
A joining structure, comprising: a deformation portion that protrudes from the tip of the base portion toward the other shape member and is crushed by the fastening force of the screw. The deformed portion is
The joining structure according to claim 1, further comprising an inclined surface inclined with respect to the longitudinal direction. The deformed portion is
3. The apparatus according to claim 2, wherein when the screw is tightened to the threaded portion, the inclined surface displaces the edge portion of the second insertion hole in a direction away from the threaded portion. junction structure. At the tip of the base,
A flat surface is provided,
The deformed portion is
The joint structure according to any one of claims 1 to 3, wherein the joint structure protrudes from a partial region of the flat surface toward the other shape member. A joint structure in which the first shape member and the second shape member are joined together by screws with a sealing material sandwiched between the longitudinal end faces of the first shape member and the second shape member. hand,
In the first shape,
a first insertion hole through which the screw is inserted;
a projecting portion inclined toward the second shape member toward the central axis of the first insertion hole,
The sealing material includes
A second insertion hole through which the screw is inserted is provided,
In the second shape,
a threaded portion into which the threaded portion of the screw inserted through the first insertion hole and the second insertion hole is screwed;
The protrusion is
A joint structure, wherein a fastening force of the screw deforms a proximal end portion so that the tip comes close to the seating surface of the screw, and the tip abuts the threaded portion. a first shape member, a second shape member, and a seal member sandwiched between the first shape member and a longitudinal end face of the second shape member; and said second shaped members are joined together by the joining structure according to any one of claims 1 to 5.

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