JP2017070607A - Joint structure and joint method of sink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint structure of a sink which is simple in configuration and does not require severe dimensional accuracy, nor expose a joint layer by an adhesive to the outside, and provide a joint method.SOLUTION: A joint structure 1 for fitting a sink 2 to a worktop 3 comprises the sink 2 having a peripheral wall part 6 in which an upper end part 7 is formed obliquely with an inclination angle, and the worktop 3 in which an opening end part 5 for fitting the sink 2 has a prescribed thickness. A gap formed between the peripheral wall part 6 and the opening end part 5 in a state in which the upper end part 7 of the sink 2 is inserted into the opening end part 5 of the worktop 3 is a joint layer 12 for pouring an adhesive which joins the sink 2 and the worktop 3. The gap is formed so as to expand toward the undersurface side of the worktop 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joining structure and a joining method for joining a sink to a worktop.

  Conventionally, in order to attach the sink to the work top, as shown in FIGS. 6A and 6B as a conventional example, the sink 61 is inserted into the opening end 63 of the work top 62 and the adhesive is poured. A bonding structure and a bonding method for bonding via the layer 64 are known.

  In this joining structure and joining method, as shown in FIG. 6B, the inner peripheral surface 68 of the upper end portion 67 of the peripheral wall portion 66 of the sink 61 is inclined with respect to the opening end portion 63 of the work top 62, thereby An adhesive is applied and cured in a gap that opens upward between the opening end 63 of the top 62 and the inner peripheral surface 68 of the upper end 67 of the sink 61, and the top 69 of the upper end 67 of the sink 61 is ground. The upper surface of the work top 62 is flush with the upper surface.

  In Patent Documents 1 and 2, the inner peripheral surface of the sink mounting hole of the top plate and the flange and outer peripheral surface of the upper end of the sink are joined and fixed with an adhesive, and the top plate and the top of the sink are ground. A configuration for obtaining continuity without a step is disclosed.

  Further, in Patent Document 3, the opening end of the sink is provided with a flange having a rising piece, and the rising piece abuts along the opening of the counter to form an adhesive accommodating space. A configuration is disclosed in which an adhesive is applied to the housing space and the sink is joined to the counter.

Japanese Patent No. 5062393 Japanese Patent No. 4670509 JP 2012-110455 A

  The joining structure and joining method for joining the sink of the conventional example shown in FIG. 6 to the work top is performed even if the top surface of the joining layer 64 is ground when the top portion 69 of the sink 61 is ground as described above after joining. There is a problem in that the upper surface of the layer 64 is exposed and looks bad, and there are traces of bubbles generated from the adhesive in the bonding layer 64.

  In the joining structures and joining methods described in Patent Documents 1 to 3, since the joining surface is exposed upward, not only the problem similar to the joining structure and joining method described in FIG. 6 but also the structure of the joint is complicated. There is a problem.

  Further, since the appearance is poor if the sink joining position is biased with respect to the work top opening, it is necessary to join the sink with respect to the work top opening with high precision so that the sink joining position is not biased. However, in the joining structures and joining methods described in Patent Documents 1 to 3, it is considered that the dimensional accuracy is severely required for the positioning of the work top opening and the sink in the joining portion, and the manufacturing cost is increased.

  An object of the present invention is to solve the above-described conventional problems, and an object of the present invention is to realize a sink junction structure and a junction method that have a simple configuration and that do not require severe dimensional accuracy.

  In order to solve the above problems, the present invention is a joining structure for attaching a resin-made sink to a worktop, and a sink having a peripheral wall portion whose upper end portion is inclined and has an inclination angle; A work top having an opening end for attaching the sink to a predetermined thickness; and the peripheral wall portion and the opening end in a state where the upper end portion of the sink is inserted into the opening end portion of the work top. A gap formed between the sink and the work top is used as a bonding layer for pouring an adhesive for bonding the sink and the work top, and the gap is formed so as to expand toward the lower surface side of the work top. A sink junction structure is provided.

  It is preferable that the peripheral wall portion has a first inclination angle as an inclination angle, and the opening end portion has a second inclination angle in the thickness direction.

  The gap is preferably formed only on the lower surface side of the worktop.

  In order to solve the above problems, the present invention is a bonding method for attaching a resin sink to a worktop, and includes a sink having a peripheral wall portion whose upper end portion is inclined and has an inclination angle. An assembly step in which an opening end for mounting the sink is inserted into a worktop having a predetermined thickness, and the peripheral wall portion in a state where the upper end of the sink is inserted into the opening end of the worktop. A joining step of pouring an adhesive for joining the sink and the worktop into a gap formed so as to expand toward the lower surface side of the worktop between the opening end portion, and the adhesive And a finishing step of removing the upper end portion of the peripheral wall portion after being cured.

  According to the joining structure and joining method of the sink according to the present invention, the sink can be easily inserted and joined to the opening end of the worktop with a simple configuration, and dimensional accuracy for severe alignment is not required. In the plan view, the sink can be joined to the open end of the worktop without being biased.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining Example 1 of the joining structure and joining method of the sink which concerns on this invention, (a) is a top view of the kitchen provided with the sink and the worktop, (b) is B- of (a). It is sectional drawing which shows a junction structure by B cross section. It is a figure explaining the joining method of the sink of the said Example 1, (a) is sectional drawing explaining the cross-sectional shape of each of a sink and a worktop, (b) is sectional drawing explaining the process to insert. (C) is sectional drawing which shows the state immediately after adhesion | attachment. It is a figure explaining Example 2 of the joining structure and joining method of the sink which concerns on this invention, (a) is a top view of the kitchen provided with the sink and the worktop, (b) is B- of (a) It is sectional drawing which shows a junction structure by B cross section. It is a figure explaining the joining method of the sink of the said Example 2, (a) is sectional drawing explaining the cross-sectional shape of each of a sink and a worktop, (b) is sectional drawing explaining the process to insert. (C) is sectional drawing which shows the state immediately after adhesion | attachment. It is a figure explaining the modification of the joining structure of the sink of the said Example 2, and the joining method, (a) is sectional drawing of the joining structure of the modification 1, (b) is a cross section of the joining structure of the modification 2. FIG. It is sectional drawing explaining the prior art example of the joining structure and joining method of a sink, (a) shows joining structure, (b) is a figure explaining each sectional shape of a sink and a worktop, (c) is It is sectional drawing which shows the state immediately after adhesion | attachment.

  A mode for carrying out a sink joining structure and a joining method according to the present invention will be described below with reference to the drawings based on the embodiments.

Example 1
A first embodiment of a sink joining structure and joining method according to the present invention will be described with reference to FIGS. As shown in FIG. 1A, in the kitchen 1, the sink 2 is attached to the opening end 5 (a part of the inner peripheral surface of the opening) of the work top 3.

  Specifically, as shown in FIG. 1B, the joining structure 11 of the present invention has an upper end 7 of the peripheral wall 6 of the sink 2 (an upper end 7 of the sink 2) at the opening end 5 of the worktop 3. However, it is a configuration in which the adhesive layer is attached via an adhesive poured into the bonding layer 12.

  As will be described in detail later, in this joining structure 11, the outer peripheral surface 8 of the upper end portion 7 of the sink 2 is formed obliquely with respect to the perpendicular line. The open end 5 of the work top 3 is also formed obliquely with respect to the perpendicular.

  When the upper end portion 7 of the sink 2 is inserted into the opening end portion 5 of the work top 3, it is formed by the angle difference between the outer peripheral surface 8 of the upper end portion 7 of the peripheral wall portion 6 of the sink 2 and the opening end portion 5 of the work top 3. This gap is used as a bonding layer 12 for pouring (filling) the adhesive, and the adhesive is poured (filled) into the bonding layer 12 so that the sink 2 and the worktop 3 are bonded.

  Hereinafter, the structure of the sink joining structure and the joining method will be described in detail with reference to the structure of the upper end portion 7 of the sink 2 and the opening end portion 5 of the work top 3 which are formed in advance. . The sink joining method includes an assembly process, a joining process, and a finishing process.

Sink and worktop configuration:
The upper end portion 7 of the sink 2 and the open end portion 5 of the work top 3 that are joined to each other are formed in advance in the following shapes when molding.

As shown in FIG. 2A, the outer peripheral surface 8 of the upper end portion 7 of the sink 2 has a first inclination angle α ₁ that inclines downward toward the outside of the outer periphery of the sink 2. doing. Specifically, the first inclination angle α ₁ of the upper end portion 7 of the sink 2 is defined as the inclination angle of the outer peripheral surface 8 with respect to the perpendicular line 13.

The open end 5 of the worktop 3 to which the sink 2 is attached has a predetermined thickness t as shown in FIG. 2 (a), but from the upper edge 16 toward the lower edge 17, that is, downward in the thickness direction. a second inclination angle alpha ₂ which is inclined so that the opening is and spreading. The second inclination angle α ₂ of the opening end 5 is defined as the inclination angle of the opening end 5 made with respect to the perpendicular line 13.

The first inclination angle α ₁ of the upper end portion 7 of the sink 2 and the second inclination angle α ₂ of the opening end portion 5 are such that the first inclination angle α ₁ <the second inclination angle α ₂ , respectively. To form. In short, the first inclination angle alpha ₁ and a second inclination angle alpha ₂ of the open end portion 5 of the upper portion 7 of the sink 2 is formed so that the angle difference therebetween occurs.

  The dimensions of the upper edge 16 of the open end 5 of the work top 3 and the outer peripheral surface 8 of the upper end 7 of the sink 2 are as follows. In the assembling process of inserting into the part 5, the upper edge 16 of the open end 5 of the worktop 3 is formed so as to contact the outer peripheral surface 8 of the upper end 7 of the sink 2.

Here, the size in plan view of the upper edge 16 of the opening end 5 is the vertical and horizontal width in plan view. Further, the dimension in plan view of the outer peripheral surface 8 of the upper end portion 7 of the sink 2 is the vertical and horizontal width in the horizontal plane at each point in the vertical direction of the outer peripheral surface 8, and the first inclination angle with the upper end of the outer peripheral surface 8. the dimension determined in accordance with the alpha _1.

Assembly process:
The upper end portion 7 of the sink 2 formed as described above is inserted into the open end portion 5 of the work top 3. As shown in FIGS. 2 (a) and 2 (b), this insertion is performed by moving the work top 3 and the sink 2 so that they are relatively close to each other when the work top 3 is disposed above the sink 2. May be.

  Although not shown, the work top 3 and the sink 2 are relatively moved in the state shown in FIGS. 2 (a) and 2 (b) upside down, that is, in the state where the work top 3 is disposed below the sink 2. You may move and insert so that it may approach.

  When inserted in this way, the upper edge 16 of the open end 5 of the worktop 3 comes into contact with the inclined outer peripheral surface 8 of the upper end 7 of the sink 2 as shown in FIG.

When the sink 2 is inserted until the upper edge 16 of the open end 5 of the work top 3 comes into contact with the inclined outer peripheral surface 8 of the upper end 7 of the sink 2, the first inclination angle α ₁ of the outer peripheral surface 8 of the sink 2. And a gap 21 based on an angle difference between the opening end 5 and the second inclination angle α ₂ of the opening end 5 is formed.

  The gap 21 is a gap that extends downward from a contact portion between the upper edge 16 of the opening end 5 and the outer peripheral surface 8 of the upper end 7 of the sink 2, and extends along the periphery of the upper end 7 of the sink 2. The bonding layer 12 is formed and used for pouring the adhesive.

Joining process:
Next, when an adhesive is poured into the bonding layer 12 thus formed, the sink 2 and the work top 3 are bonded as shown in FIG. 2C after the adhesive is cured.

Finishing process:
In the joined state as shown in FIG. 2 (c), the top portion 22 of the upper end portion 7 of the sink 2 protrudes upward from the upper surface of the work top 3. It is flush with the top surface. As a result, as shown in FIG. 1A, a connection structure 11 for the sink 2 is formed, in which the ground surface of the top portion 22 of the sink 2 and the upper surface of the work top 3 are smoothly continuous.

(Function)
According to the sink joining structure and joining method of the first embodiment having the above-described configuration, the joining layer 12 spreads downward from the contact portion between the upper edge 16 of the opening end 5 and the outer peripheral surface 8 of the sink 2. In the state where the adhesive is poured and the upper edge 16 of the open end 5 and the outer peripheral surface 8 of the sink 2 are joined, the joining layer 12 is formed on the lower side of the work top 3, Seen from above, it doesn't get exposed so it doesn't look bad.

  Further, according to the joining structure and joining method of the sink of the first embodiment, the sink 2 is inserted into the opening end 5 of the work top 3, and the upper edge 16 of the opening end 5 of the work top 3 is the upper end of the sink 2. 7 is brought into contact with the inclined outer peripheral surface 8.

  Accordingly, the upper end portion 7 of the sink 2 and the open end portion 5 of the work top 3 have simple configurations, respectively, but the insertion work is relatively easy, and the upper end portion 7 of the sink 2 and the open end portion of the work top 3 are easy. With respect to the alignment of the part 5, the sink 2 can be arranged without being biased in plan view with respect to the opening end part 5 of the worktop 3 without requiring dimensional accuracy severely.

(Example 2)
Embodiment 2 of the sink joining structure and joining method according to the present invention will be described with reference to FIGS. Also in the second embodiment, as shown in FIG. 3A, in the kitchen 31, the sink 32 is attached to the opening end portion 35 (the inner peripheral surface of the opening) of the work top 33.

  Specifically, as shown in FIG. 3B, the bonding structure 41 of the second embodiment is bonded to the opening end 35 of the work top 33 and the upper end 37 of the sink 32 poured into the bonding layer 42. It is the structure formed through an agent.

  As will be described in detail later, in the joint structure 41 of the second embodiment, the outer peripheral surface 38 of the upper end portion 37 of the peripheral wall portion 36 of the sink 32 is formed obliquely with respect to the vertical line. Further, the opening end 35 of the work top 33 is also formed obliquely with respect to the perpendicular 43.

  When the upper end portion 37 of the sink 32 is inserted into the opening end portion 35 of the work top 33, the angle difference between the outer peripheral surface 38 of the upper end portion 37 of the peripheral wall portion 36 of the sink 32 and the opening end portion 35 of the work top 33 is formed. The gap formed is a bonding layer 42 for pouring the adhesive, and the adhesive 32 is poured into the bonding layer 42 so that the sink 32 and the work top 33 are bonded.

  The sink joining structure and joining method of the second embodiment will be described below with reference to the structures of the upper end 37 of the sink 32 and the opening end 35 of the work top 33, which are formed in advance, and through the steps of the joining method. This will be described in detail. The sink joining method includes an assembly process, a joining process, and a finishing process.

Sink and worktop configuration:
The upper end portion 37 of the sink 32 and the open end portion 35 of the work top 33 to be joined to each other are formed in advance in the following shapes at the time of molding.

As shown in FIG. 4A, the upper end portion 37 of the sink 32 has a first inclination angle β ₁ such that the outer peripheral surface 38 is inclined from the upper side to the lower side toward the inner side of the outer periphery of the sink 32. Have. Specifically, the first inclination angle β ₁ of the upper end portion 37 of the sink 32 is defined as the inclination angle of the outer peripheral surface 38 with respect to the perpendicular 43.

In the second embodiment, the inner peripheral surface 39 at the upper end 37 of the sink 32, as shown in FIG. 4 (a), parallel to the outer peripheral surface 38 having a first inclination angle beta _1. In short, the upper end portion 37 of the sink 32 is formed so that the cross-sectional width is the same width s (the same thickness) and the first inclination angle β ₁ extends obliquely upward.

  As in the first embodiment, the upper end portion 37 of the sink 32 may have a configuration in which the cross-sectional width is not the same, but the thickness gradually decreases upward.

The opening end portion 35 of the work top 33 to which the sink 32 is attached has a predetermined thickness t, and is inclined so that the opening narrows from the upper edge 46 toward the lower edge 47, that is, downward in the thickness direction. And an inclination angle β ₂ of ₂ . The inclination angle β ₂ of the opening end 35 is defined as the inclination angle of the opening end 35 made with respect to the perpendicular 43.

The magnitude of the first inclination angle β ₁ of the upper end portion 37 of the sink 32 and the second inclination angle β ₂ of the opening end portion 35 is such that the first inclination angle β ₁ > the second inclination angle β _2. To form. In short, the second inclination angle beta ₂ of the first inclination angle beta ₁ and the opening end portion 35 of the upper end portion 37 of the sink 32 is formed so that the angle difference therebetween occurs.

  In addition, the dimension in plan view of the upper edge 46 of the open end 35 of the work top 33 and the outer peripheral surface 38 of the upper end 37 of the sink 32 is set so that the upper end 37 of the sink 32 is connected to the open end of the work top 33 as described later. In the step of inserting into the portion 35, the upper edge 46 of the open end portion 35 of the work top 33 is formed so as to contact the outer peripheral surface 38 of the upper end portion 37 of the sink 32.

Here, the dimension of the upper edge 46 of the opening end 35 is the vertical and horizontal width in plan view. Further, the size in plan view of the outer peripheral surface 38 of the upper end portion 37 of the sink 32 is the vertical and horizontal width in the horizontal plane at each point in the vertical direction of the outer peripheral surface 38, and the first inclination angle with the upper end of the outer peripheral surface 38. is also the size depends on the β _1.

Assembly process:
Next, the upper end portion 37 of the sink 32 formed as described above is inserted into the open end portion 35 of the work top 33. As shown in FIGS. 4A and 4B, this insertion is performed so that the work top 33 and the sink 32 are relatively close to each other in a state where the work top 33 is disposed below the upper end portion 37 of the sink 32. May be inserted.

  Although not shown, the work top 33 and the sink 32 are reversed in the state shown in FIGS. 4A and 4B, that is, in the state where the work top 33 is disposed above the upper end portion 37 of the sink 32. May be inserted so as to move closer to each other.

  When inserted in this manner, the upper edge 46 of the opening end 35 of the work top 33 comes into contact with the inclined outer peripheral surface 38 of the upper end 37 of the sink 32 as shown in FIG.

When the sink 32 is inserted so that the upper edge 46 of the open end portion 35 of the work top 33 is in contact with the inclined outer peripheral surface 38 of the upper end portion 37 of the sink 32, the first inclination angle of the outer peripheral surface 38 of the sink 32. A gap 51 is formed based on an angle difference between β ₁ and the second inclination angle β ₂ of the opening end 35.

  The gap 51 is a gap that extends downward from a contact portion between the upper edge 46 of the opening end 35 and the outer peripheral surface 38 of the sink 32, and is formed along the periphery of the upper end portion 37 of the sink 32. The bonding layer 42 is used for pouring the agent.

Joining process:
Next, an adhesive is poured into the bonding layer 42 formed as described above, and after the adhesive is cured, the sink 32 and the work top 33 are bonded as shown in FIG.

Finishing process:
In the joined state as shown in FIG. 4C, the top portion 52 of the upper end portion 37 of the sink 32 protrudes upward from the upper surface of the work top 33. The upper surface is flush with the upper surface of the worktop 33. As a result, as shown in FIG. 3A, a sink connection structure 41 is formed in which the ground surface of the top portion 52 of the sink 32 and the upper surface of the worktop 33 are smoothly continuous.

(Function)
According to the sink joining structure and joining method of the first embodiment having the above-described configuration, the joining layer 42 spreads downward from the contact portion between the upper edge 46 of the opening end 35 and the outer peripheral surface 38 of the sink 32. In the state in which the adhesive is poured and the upper edge 46 of the opening end 35 and the outer peripheral surface 38 of the sink 32 are bonded with the adhesive, the bonding layer 42 is formed below the work top 33. Since it is formed and is not exposed when viewed from above, the appearance does not deteriorate.

  Further, according to the joining structure and joining method of the sink of the second embodiment, the sink 32 is inserted into the opening end 35 of the work top 33, and the upper edge 46 of the opening end 35 of the work top 33 is the upper end of the sink 32. 37 is brought into contact with the inclined outer peripheral surface 38.

  Accordingly, the upper end portion 37 of the sink 32 and the open end portion 35 of the work top 33 have simple configurations, respectively, but the insertion work is relatively easy, and the upper end portion 37 of the sink 32 and the open end of the work top 33 are also easy. With respect to the alignment of the portion 35, the sink 32 can be arranged without being biased in plan view with respect to the opening end portion 35 of the worktop 33 without requiring dimensional accuracy severely.

  Furthermore, in the joining structure and joining method of the sink of Example 2, the upper end portion 37 of the sink 32 is formed in advance so as to extend obliquely upward with the same cross-sectional width. In the finishing process, when the top 52 of the upper end 37 of the sink 32 is ground, the area of the grinding surface is small and uniform along the circumferential direction of the sink 32 regardless of the size of the protrusion.

(Modification)
FIG. 5A is a cross-sectional view illustrating a first modification of the second embodiment. The joining structure 53 and joining method of the first modification are substantially the same as the joining structure and joining method of the second embodiment shown in FIGS. 3 and 4, and the upper end portion 37 of the sink 32 is the workpiece as in the second embodiment. A gap formed downward between the upper end portion 37 of the sink 32 and the open end portion 55 of the work top 54 in a state of being inserted into the open end portion 55 of the top 54 is a bonding layer for pouring the adhesive. 56, and an adhesive is poured into the bonding layer 56 to bond the sink 32 and the worktop 54 together.

The difference between the bonding structure 53 and the bonding method of the first modification example and the bonding structure and the bonding method of the second embodiment is that the second inclination angle β ₂ of the opening end portion 55 of the work top 54 is set to 0 °. is there. In short, in the joining structure 53 and joining method of the first modification, the open end 55 of the work top 54 is not an inclined surface but a vertical surface.

  FIG. 5B is a cross-sectional view illustrating a second modification of the second embodiment. The joining structure 57 and joining method of this modification 2 are substantially the same as the joining structure and joining method of the second embodiment shown in FIGS. 3 and 4, and the upper end portion 37 of the sink 32 is the workpiece as in the second embodiment. A gap formed downward between the upper end portion 37 of the sink 32 and the open end portion 59 of the work top 58 in a state of being inserted into the open end portion 59 of the top 58 is a bonding layer for pouring the adhesive. 60, and an adhesive is poured into the bonding layer 60 to bond the sink 32 and the work top 58 together.

The difference between the joining structure 57 and the joining method of the second modification example and the joining structure and joining method of the second embodiment is that the opening end 59 of the work top 58 is inclined so that the opening becomes wider downward in the thickness direction. It is the point formed so that it may have the 2nd inclination | tilt angle (beta) ₂ .

  As mentioned above, although the form for implementing the joining structure and joining method of the sink which concerns on this invention was demonstrated based on the Example, this invention is not limited to such an Example, and it is in a claim. It goes without saying that there are various embodiments within the technical scope described.

  Since the configuration according to the present invention is as described above, the present invention can also be applied to the joining of a sink to a worktop in a kitchen, and the joining of a sink to a worktop in various applications.

1,31 Kitchen
2, 32 sinks
3, 33, 54, 58 Worktop
5, 35, 55, 59 Open end
6, 36 Sink peripheral wall
7, 37 Upper end of sink
8, 38 Outer peripheral surface of the upper end of the sink 39 Inner peripheral surface of the upper end of the sink
11, 41, 53, 57 Junction structure
12, 42, 56, 60 Bonding layer
13, 43 perpendicular
16, 46 The upper edge of the open end of the worktop
17, 47 Lower edge of worktop opening edge
18, 48 The top vertex of the sink
21, 51 Clearance
22, 52 Top of top of sink 61 Sink 62 Work top 63 Open end of work top 64 Bonding layer 66 Sink peripheral wall 67 Sink upper end 68 Inner peripheral surface of sink top 69 Top of top of sink

Claims (4)

A joint structure for attaching a resin-made sink to a work top, wherein an upper end portion has an inclined angle and a peripheral wall portion formed obliquely, and an opening end portion to which the sink is attached A worktop having a predetermined thickness,
A gap formed between the peripheral wall portion and the open end portion in a state where the upper end portion of the sink is inserted into the open end portion of the work top is an adhesive that joins the sink and the work top. A sink joining structure, wherein the sink is formed as a joining layer for pouring, and the gap is formed to expand toward the lower surface side of the worktop.   2. The sink joining structure according to claim 1, wherein the peripheral wall portion includes a first inclination angle as an inclination angle, and the opening end portion includes a second inclination angle in a thickness direction.   The sink joining structure according to claim 1, wherein the gap is formed only on a lower surface side of the worktop. A joining method for attaching a resin sink to a worktop,
An assembly step of inserting a sink having a peripheral wall portion formed obliquely with an upper end portion having an inclination angle into a worktop having an opening end portion to which the sink is attached has a predetermined thickness;
In the gap formed so as to expand toward the lower surface side of the worktop between the peripheral wall portion and the open end portion in a state where the upper end portion of the sink is inserted into the open end portion of the worktop. , A joining step of pouring an adhesive for joining the sink and the worktop;
A finishing step of removing the upper end portion of the peripheral wall portion after the adhesive is cured,
A method of joining a sink, comprising:

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