JP2012143481A - Kitchen top board with water tub and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a kitchen top board with a water tub which enables the top board to be excellently welded with the water tub and which improves the appearance of a welding portion, when manufacturing the kitchen top board with the water tub through the use of a precoated steel sheet.SOLUTION: The top board 9 having a water tub attachment opening is formed of a stainless steel sheet where the front surface of the stainless steel sheet is precoated. A polished band 9b where precoating 9a is removed by polishing is formed in the margin of the water tub attachment opening in the top board 9. The flange part 41 of the water tub 40 is superimposed on the rear surface side of the margin of the water tub attachment opening in the top board 9. Then, the margin of the water tub attachment opening and the flange part 41 are mutually welded.

Description

  In the present invention, a top plate having a water tank mounting opening is formed of a stainless steel plate precoated on the surface side of the stainless steel plate, and a flange portion of the water tank is provided on the back side of the edge of the water tank mounting opening of the top plate. The present invention relates to a kitchen top plate with a water tank that is overlapped and the edge of the water tank mounting opening and the flange are welded to each other, and a method for manufacturing the same.

  Conventionally, when manufacturing a metal sink, a sink member (water tank) is attached to the opening (water tank mounting opening) of the upper surface member (top plate) from the lower surface side and joined by welding (for example, Patent Document 1). reference).

  Moreover, although it is not such a kitchen top plate with a water tank, the precoat stainless steel plate for kitchen panels excellent in stain resistance and abrasion resistance for applying to the wall material around a kitchen is also disclosed (for example, , See Patent Document 2).

JP 2001-9579 A Japanese Patent Laid-Open No. 11-48402

  However, in the precoated stainless steel sheet described in Patent Document 2, there is a description that good performance was obtained in appearance, paint adhesion, workability, stain resistance, wear resistance, and coating hardness. Rather than post-coating the stainless steel plate after being processed into a shape, it can be speculated that using a pre-coated pre-coated steel plate and then processing into a rectangular flat plate can improve productivity, When using a welding method such as resistance welding that uses electrical resistance when attaching a water tank to the water tank mounting opening of the top plate and welding, the precoat hinders the flow of current and can not make a good welding state, There is a problem that the precoat is peeled off due to heat generated by welding, and the appearance of the kitchen top with a water tank becomes poor.

  The present invention has been made paying attention to such problems, and when the top plate for a kitchen with a water tank is manufactured using a pre-coated steel plate, the top plate and the water tank can be well welded. And it aims at providing the top plate for the kitchen with a water tank which can improve the appearance of the welding part, and its manufacturing method.

In order to solve the above-mentioned problem, the manufacturing method of the top plate for a kitchen with a water tank of the present invention,
A top plate forming step of forming a top plate having a water tank mounting opening with a stainless steel plate provided with a predetermined precoat, and a flange portion of the water tank is overlaid on the back side of the edge of the water tank mounting opening of the top plate In the method of manufacturing a kitchen top plate with a water tank, including a welding step of welding the edge of the water tank mounting opening and the flange part to each other,
A polishing band forming step of polishing and removing the precoat on the edge of the water tank mounting opening of the top plate to form a polishing band; and in the welding step, the edge of the water tank mounting opening where the polishing band is formed; The flange portion is welded to each other.
According to this feature, when manufacturing a kitchen top plate with a water tank, a pre-coated steel plate that has been coated in advance is used instead of a post-coat that performs a predetermined coating after forming a metal kitchen top plate. By using it, the post-coating process can be saved, the top plate and the water tank can be well welded, and the edge of the water tank mounting opening affected by the welding heat is precoated by the formation of the polishing band. It becomes a non-existing site | part, it can prevent that a precoat peels with the heat | fever by welding, and can improve the appearance of the welding site | part.

The manufacturing method of the top plate for a kitchen with a water tank of the present invention,
In the welding step, welding is performed by applying a voltage while pressing the edge of the water tank mounting opening and the flange portion with upper and lower electrodes.
According to this feature, the edge of the water tank mounting opening is a portion where no precoat exists due to the formation of the polishing band, and the current flow is not hindered, and a welding method such as resistance welding using electric resistance is used. In addition, the edge of the water tank mounting opening and the flange are welded while being pressed by the upper and lower electrodes, thereby being firmly joined to each other.

The manufacturing method of the top plate for a kitchen with a water tank of the present invention,
After the welding step, the method further includes an edge portion polishing step for polishing and removing the edge portion of the edge of the water tank mounting opening, and the edge portion polishing step is performed by polishing from the edge portion to the polishing band. .
According to this feature, it is possible not only to make the polishing eye of the polishing band and the polishing eye of the edge part into one pattern, but also to make the positional deviation when the water tank is attached inconspicuous.

The kitchen top plate with a water tank of the present invention,
A top plate having a water tank mounting opening is formed from a stainless steel plate pre-coated on the surface side of the stainless steel plate, and a flange portion of the water tank is superimposed on the back side of the edge of the water tank mounting opening of the top plate, In the kitchen top plate with a water tank in which the edge of the water tank mounting opening and the flange are welded to each other,
A polishing band in which the precoat is polished and removed is formed on the edge of the water tank mounting opening of the top plate, and the edge of the water tank mounting opening in which the polishing band is formed and the flange are welded together. It is said.
According to this feature, when manufacturing a kitchen top plate with a water tank, a pre-coated steel plate that has been coated in advance is used instead of a post-coat that performs a predetermined coating after forming a metal kitchen top plate. By using it, the post-coating process can be saved, the top plate and the water tank can be well welded, and the edge of the water tank mounting opening affected by the welding heat is precoated by the formation of the polishing band. It becomes a non-existing site | part, it can prevent that a precoat peels with the heat | fever by welding, and can improve the appearance of the welding site | part.

The kitchen top plate with a water tank of the present invention,
The top plate is formed of an embossed stainless steel plate.
According to this feature, scratches on the surface of the top plate are less noticeable when the top plate is used due to minute unevenness due to embossing.

It is drawing explaining the manufacturing process of the top plate for kitchens with a water tank of this invention. It is a top view of the precoat steel plate which removed the surface coating film of the water tank welding location. It is one Example which cut | disconnected the peripheral edge part of the precoat steel plate in the top plate expansion | deployment shape. It is a perspective view of the top plate for kitchens which bent the top plate expansion | deployment shape of FIG. It is explanatory explanatory drawing which seam-welds the flange part of a water tank to a water tank attachment opening part. It is a completion perspective view of the top plate for kitchens with a water tank which is one Example of the present invention. FIG. 3 is an explanatory schematic view of a precoat polishing machine that removes the surface coating film of FIG. 2. It is an explanatory schematic diagram of a spot welder.

  EMBODIMENT OF THE INVENTION The form for implementing the kitchen top plate with a water tank which concerns on this invention, and its manufacturing method is demonstrated below based on an Example.

  A kitchen top with a water tank and a method for manufacturing the same according to an embodiment will be described with reference to FIGS. The manufacturing method of the kitchen top plate with a water tank of this invention is performed in the procedure shown in FIG. In FIG. 1, the upper and lower outer sides of the paper without the black arrow and the part with a reference numeral such as 21 indicate the layout image of the manufacturing equipment, and the part with the black arrow indicates the planar shape image in which the precoated steel plate is processed into a kitchen top plate with a water tank. (Including some side views). The present invention is a kitchen top plate with a water tank and can be applied to either a system kitchen or a sectional kitchen. Here, a sectional kitchen without a mounting opening for a heater in the top plate portion will be described below as an example. . Moreover, a present Example demonstrates as an example the sink with the unevenness | corrugation for draining in the water tank attachment opening part 7 of the kitchen top plate 1, or a cooking-table part.

  The manufacturing equipment is arranged so that a series of processing can be automatically performed from the upper right side of the drawing. In the present embodiment, the first press machine 12 is next to the metal plate mounting table 10, the precoat grinding machine 11, and the transfer machine 10a. , Second press cutting machine 13, first folding machine 14, second folding machine 15, third folding machine 16, fourth folding machine 17, fifth folding machine 18, and sixth. A multi-bending machine is arranged in the order of a bending machine 19 and a seventh bending machine 20, and then a third press cutting machine 21, a first side plate press machine 22, a first welder 23, and a second side plate press. The machine 24 and the second welding machine 25 are continuously arranged, and the kitchen top plate 1 having an opening in the water tank portion is formed.

  Then, a stainless steel tank 40 (sink) prepared in advance is joined to the water tank mounting opening 7 of the kitchen top plate 1 from the back side to complete the kitchen top plate 30 with a water tank. The water tank 40 is temporarily fixed to the water tank mounting opening 7 with the welding machine 50, the entire circumference of the water tank mounting opening 7 is welded watertight with the seam welding machine 60, and the water tank 40 is used with the first polishing machine (coarse polishing machine) 70. After the edge portion 7a protruding to the inside is removed and sequentially polished by the second polishing machine 71 and the third polishing machine (finish polishing machine) 72 so as to become a predetermined finish polishing mark 31 (see FIG. 6). Then, after passing through a cleaning / drying step 80 in which dirt such as oil adhering to the surface of the kitchen top 30 with a water tank is cleaned and then dried, the defective product is finally removed in the inspection step 90 to obtain a finished product.

  The multi-bending machine is a well-known facility, and can be handled by exchanging workpieces such as dies and setting the bending position in the machine according to various top plate opening lengths and top plate shapes. The precoated steel plate 9 can be cut into a predetermined top plate developed shape 1a, an arbitrary pattern of shallow drawing can be provided on the top plate surface, or a predetermined portion can be bent. Further, the first and second welding machines are provided with robot arm equipment, and predetermined portions for welding the metal plate small pieces 5 (5a, 5b) to the cutout portions 6 (6a, 6b) of the side plates. The small piece 5 can be automatically set on the head (see FIGS. 3 and 4).

  A plurality of rectangular stainless steel precoated steel plates 9 stacked on the metal plate table 10 are transferred to a precoat grinding machine 11 or a first press machine by a transfer machine 10a provided with a vacuum suction mechanism for each uppermost sheet. 12 is transported and set. The precoat grinding machine 11 removes in advance the coating applied to the stainless steel surface with an insulating material or a hardly conductive material in order to join the water tank 40 to the water tank mounting opening 7 with a seam welding machine 60 in a later process. To do.

  FIG. 7 shows a schematic diagram of the precoat grinding machine 11. The precoat polishing machine 11 is provided with a contact wheel 11c at the tip of a main shaft 11a that can be arbitrarily moved in the XY directions, and an endless polishing belt 11d is placed around the contact wheel 11c and rotated to rotate the surface of the metal plate 9. It is to be ground, and a predetermined pressure can be applied to the contact arm 11b to remove the coating film 9a having a predetermined depth. The pre-coated steel plate 9 is fixed to the base with the coating surface facing upward, and the water tank precoated on one side is ground by operating the contact wheel 11c along the water tank mounting opening 7 planned from above to grind a predetermined depth. The coating 9a around the mounting opening 7 is removed to form a polishing band 9b, and seam welding can be ensured along the polishing band 9b (see FIG. 5). FIG. 2 shows a plan view of the precoated steel sheet 9 after forming the polishing band 9b.

  In this embodiment, the precoat grinding machine 11 for forming the polishing band 9b on the precoated steel sheet 9 is arranged in front of the first press machine 12, and after the polishing band 9b is formed, it is precoated to a predetermined top plate developed shape 1a with a press machine. Although the steel plate 9 is cut, the present invention is not limited thereto. After the third press cutting machine 21, the water tank mounting opening 7 is formed, and then the edge 7a of the water tank mounting opening 7 is formed. The predetermined width of the surface coating film curtain may be ground by learning from the end portion.

  In the first press machine 12, the shape portion corresponding to the water tank mounting opening 7 and the draining shape are subjected to shallow drawing, and the top surface of the top plate is previously prevented so that processing strain does not affect the top surface of the top plate during cutting or bending in the next process. A predetermined pattern is formed on the substrate.

  Subsequently, the shallow predrawn rectangular precoated steel sheet 9 is transferred to the second press cutting machine 13. In the second press cutting machine 13, the periphery of the rectangular precoated steel sheet 9 is press-cut into a top plate developed shape 1a shown in FIG. In FIG. 3, symbols B <b> 1 to B <b> 7 indicated by a one-dot broken line indicate bending lines, and an internal thin line is a pattern such as draining that is shallow drawn by the first press machine 12.

  The front notch portion 6a and the back guard notch portion 6b of the top plate unfolded shape 1a are provided symmetrically on the side plate portions 4 on both sides of the top plate, and prevent wrinkles from being generated along the B1, B2, and B7 lines. Therefore, the bend line is cut deeply to the vicinity of the B4 and B6 lines, and the portion slightly separated is cut shallowly so as to be a welding allowance for the small piece 5 described later. The above is the process of cutting the substantially rectangular precoated steel sheet 9 into a predetermined top plate developed shape 1a with a press machine, and the bending process order will be described next.

  The kitchen top plate 1 is preferably a stainless steel plate in terms of durability and weather resistance. In consideration of design, a mirror finish, a hairline finish, or an embossed finish is used. It is preferable to use a steel sheet having a film attached to the steel sheet surface.

  The bending is performed by the first folding machine 14 to the seventh folding machine 20 by sequentially transferring the precoated steel sheet 9 having the top plate developed shape 1a to each folding machine. The side surface shape in each bending machine is shown below the plan shape image diagram of FIG.

  First, when the precoated steel sheet 9 cut into the top plate unfolded shape 1a is transferred from the second press cutting machine 13 to the first folding machine 14, the first folding machine 14 uses the back guard along the line B2. The end of the portion 3 is bent and formed in the mountain direction. In the second bending machine 15, the front portion 2 is bent and formed in the mountain direction along the line B1. Then, the third bending machine 16 moves to the bending of the side plate part 4, and is bent at an acute angle or a right angle in the mountain direction in order to ensure the strength of the side plate part 4 along the line B3. 17, the side plate portion 4 is bent at right angles in the mountain direction along the B4 line, and the B5 line and the B6 line are connected to the third and fourth bending machines in the fifth bending machine 18 and the sixth bending machine 19, respectively. Folding is performed in the same manner as in 17. And in the 7th bending processing machine 20, it carries out bending bending shaping | molding in the trough direction of the back guard part 3 start-up by B7 line.

  In addition, in order to show a bending direction, although the direction was described by the mountain and valley, you may reverse a series of description. Further, the order of the first and second bending machines 14 and 15 may be changed, and the order of the third and fourth bending machines 16 and 17 and the fifth and sixth bending machines 18 and 19 is changed. Or vice versa. Furthermore, when the precoated steel plate is thick, the third and fifth bending machines 16 and 18 may be omitted.

  When the bending process of the front part 2 and the back guard part 3 is completed, it is then transferred to the third press cutting machine 21 and the water tank mounting opening 7 is cut. The opening is cut along the shape of the opening that has been subjected to shallow drawing by the first press machine 12 described above, but the opening after the water tank is attached has a smooth curved surface, so that an R curved surface of the shallow drawing is left. Cut slightly inside on the opening.

  The top plate lightened by opening the water tank is transferred to the first side plate press 22 so that one side plate portion 4 is on the upper side by a rotating machine or manpower (not shown), and the side plate surface is bent flat. To be pressed and transferred to the first welding machine 23. The side plate shape at that time is a shape in which the front piece piece 5a and the back guard piece 5b shown in FIG. In the first welding machine 23, the small piece 5, which is the same material as the top plate, has a slightly larger area than the cutout shape of the front plate and the back guard formed in the side plate 4, is a robot arm (not shown) in advance. It is set at a position corresponding to each notch location, and is set so as to overlap the side plate portion 4 from the upper side, and the electrode descends from the top so that both small pieces 5a, 5b are projected at a time. To do.

  Next, the other side plate part 4 is reversed and transferred so as to face upward, and is transferred to the second side plate press machine 24 to flatten the side plate, and the second welder 25 is projection welded in the same manner as described above to make the small piece 5. Weld to side plate. In this way, projection welding is performed by applying the small pieces 5 from the inside of the side plate, so that automation is facilitated and rational manufacture is possible, and the strength of the side plate is improved, and a good-looking kitchen top plate 1 is manufactured. can do. The film for preventing wrinkles is removed by polishing the film and the coating film together in the precoat grinding machine 11 and only the side plate portions 4 are removed after the first side plate press machine 22 and the second side plate press machine 24, respectively. However, the entire film may be removed after the opening is cut by the third press cutting machine 21 in consideration of workability. FIG. 4 shows a completed drawing of the kitchen top plate 1, and “+” marks in FIG. 4 indicate welding marks.

  As described above, the molded kitchen top 1 is then completed by joining a pre-formed water tank 40 to the back surface of the water tank mounting opening 7 (see FIG. 1). ). The spot welding machine 50 whose outline is shown in FIG. 8 includes a plurality of steps for bringing the flange 41 of the water tank 40 into contact with the rear surface of the peripheral edge of the water tank mounting opening 7 of the kitchen top plate 1 and fixing the joining position. Temporarily weld the spot.

  In the spot welder, for example, a support 52 and a work table 54 are installed on a base 51, and a support arm 53 is provided on the support 52 so as to be rotatable in a horizontal direction with respect to the support 52. Then, a gun support tube 55 that supports the welding gun 56 at the front end and can be expanded and contracted in the vertical direction is attached to the lower portion of the support arm 52 so as to be movable in the front and rear directions, so that the welding gun 56 can move freely in the front and rear, right, left, and up directions. It has become. A welding power source is wired to the welding gun 56 through a cable 57 toward the electrode 59 a at the tip of the welding gun 56, and an energization switch 58 is disposed on the proximal side of the welding gun 56.

  The work table 54 is provided with an electrode 59b corresponding to the electrode 59a of the welding gun 56, and is connected to the workpiece to be placed on the work table 54 by grounding. The kitchen top plate 1 is placed on the work table 54 with the back side facing up, and the water tank is placed on the back of the peripheral edge of the water tank mounting opening 7 of the kitchen top plate 1 with the bottom of the water tank 40 facing upward from above. 40, the flange portions 41 of the water tank 40 are brought into contact with each other, the electrode 59a of the welding gun 56 is pressed from above the flange portion 41 of the water tank 40, the energization switch 58 is turned on, and several surrounding points are temporarily welded.

  Next, as shown in FIG. 5, the entire circumference of the water tank mounting opening 7 is applied by applying a predetermined voltage while pressing the peripheral edge of the water tank mounting opening 7 and the flange 41 of the water tank 40 with the upper and lower electrode wheels 61 and 62. The water tank 40 is welded and joined to the kitchen top plate 1 by seam welding. At this time, the upper electrode wheel 61 is guided while the guide lot 63 is pressed against the water tank 40 by the driving lot 64. Furthermore, a relief groove 65 is formed in the guide block 63.

  The kitchen top plate 30 with a water tank that has been seam-welded is left with the edge portion 7 a protruding inside the water tank 40, so that the edge of the first polishing machine 70 is flush with the inner surface of the water tank 40. The portion 7a is cut and removed to be roughly polished into a continuous curved surface, and the second polishing machine 71 and the third polishing machine 72 sequentially increase the polishing count to finish a predetermined finish polishing stitch 31 (see FIG. 6). Then, the dirt such as fats and oils adhering to the surface of the kitchen top 30 with a water tank in the processing steps so far is degreased and washed, and after passing through a washing / drying step 80 for drying and removing moisture at the time of washing, a defective product is finally obtained. In the inspection step 90, the kitchen top plate 30 with a water tank is completed.

  Next, the precoated steel sheet 9 used in the present invention will be described. The precoated steel sheet 9 as an embodiment of the present invention is formed, for example, by embossing a stainless steel sheet and then forming a coating film 9a having wear resistance and contamination resistance. The coating film 9a will be described in detail. As the coating material used for forming the coating film 9a, various organic paints such as an epoxy resin, an acrylic resin, a polyester resin, a urethane resin, a fluorine resin, and a silicone resin can be used. Various organic / inorganic composite paints such as silica / acrylic resin and silica / acrylic silicone resin can also be used. Furthermore, a lubricant may be added for the purpose of improving the wear resistance of the coating film 9a. As the lubricant, fluororesin powder represented by tetrafluoroethylene, olefin resin powder such as polyethylene and polypropylene, organic resin powder such as polyethylene-fluororesin composite powder and silicone resin powder are used. Further, for the purpose of improving the wear resistance of the coating film, inorganic substances such as glass flakes and glass beads may be added.

  Further, various coloring pigments can be added from the viewpoint of imparting design properties, and a matting agent can be added from the viewpoint of adjusting gloss. In addition, there are various inorganic paints such as silica-based, titania-based, alumina-based and zirconia-based paints. Since the coating film 9a is hard and the coating film 9a is cracked or peeled off during processing, the inorganic coating is not suitable for this application.

  The manufacturing method of the precoat steel plate 9 is as follows. That is, a stainless steel plate that has been embossed in advance is washed with water after alkaline degreasing, and further coated with a chromium-free pre-coating treatment solution on the embossed surface and then dried. Thereafter, for example, a thermosetting acrylic resin-based paint is applied so as to have a dry film thickness of 5 μm. Then, baking hardening is performed at a baking time of 60 seconds so that the maximum reached plate temperature is 230 ° C. to obtain a cured coating film.

  Although the embodiments of the present invention have been described above, the specific manufacturing method is not limited to these embodiments. For example, in the present invention, an opening is formed on the top surface of the top plate in the above-described cooking table or work table. The kitchen top plate 1 which is not necessary can be dealt with by passing or omitting the step of the third press cutting machine 21 of the embodiment, and the opening for the heater is provided in the kitchen top plate 30 with a water tank of the present invention. When provided, another press cutter may be provided next to the third press cutter 21. The stainless steel is not limited to SUS304 and SUS430, and other stainless steels can be used. As the precoated steel sheet 9 other than stainless steel, galvanized steel sheet, zinc / aluminum alloy plated steel sheet, zinc / aluminum / magnesium can be used. Various coated steel sheets coated with a plated steel sheet such as an alloy-plated steel sheet or an aluminum-plated steel sheet can also be used.

DESCRIPTION OF SYMBOLS 1 Kitchen top plate 1a Top plate deployment shape 2 Front part 3 Back guard part 4 Side plate part 5 Small piece 5a Front part small piece 5b Back guard part small piece 6 Notch part 6a Front notch part 6b Back guard notch part 7 Water tank mounting opening 7a Edge 9 Pre-coated steel plate (metal plate)
9a Coating film 9b Polishing band 10 Metal plate stage 10a Transfer machine 11 Precoat grinding machine 11a Main shaft 11b Contact arm 11c Contact wheel 11d Grinding belt 12 First press machine 13 Second press cutting machine 14 First folding machine 15 Second Bending machine 16 3rd bending machine 17 4th bending machine 18 5th bending machine 19 6th bending machine 20 7th bending machine 21 3rd press cutting machine 22 1st side plate press Machine 23 First welder 24 Second side plate press 25 Second welder 30 Kitchen top with water tank 31 Finishing eyes 40 Water tank (sink)
41 Flange section 50 Spot welder 51 Base 52 Support column 53 Support arm 54 Work table 55 Gun support tube 56 Welding gun 57 Cable 58 Power switch 59a Electrode 59b Electrode 60 Seam welder 61 Upper electrode wheel 62 Lower electrode wheel 63 Guide block 64 Drive lot 65 Relief groove 70 First polishing machine (rough polishing machine)
71 2nd polishing machine 72 3rd polishing machine (finish polishing machine)
80 Cleaning and drying process 90 Inspection process

Claims (5)

A top plate forming step of forming a top plate having a water tank mounting opening with a stainless steel plate provided with a predetermined precoat, and a flange portion of the water tank is overlaid on the back side of the edge of the water tank mounting opening of the top plate In the method of manufacturing a kitchen top plate with a water tank, including a welding step of welding the edge of the water tank mounting opening and the flange part to each other,
A polishing band forming step of polishing and removing the precoat on the edge of the water tank mounting opening of the top plate to form a polishing band; and in the welding step, the edge of the water tank mounting opening where the polishing band is formed; The manufacturing method of the top plate for kitchens with a water tank characterized by welding this flange part mutually.   2. The kitchen top plate with a water tank according to claim 1, wherein in the welding step, a voltage is applied to the edge of the water tank mounting opening and the flange portion while pressing them with upper and lower electrodes to weld each other. Manufacturing method.   The method further comprises an edge portion polishing step for polishing and removing the edge portion of the edge of the water tank mounting opening after the welding step, and the edge portion polishing step is performed by polishing from the edge portion to the polishing band. The manufacturing method of the top plate for kitchens with a water tank of Claim 1 or 2. A top plate having a water tank mounting opening is formed from a stainless steel plate pre-coated on the surface side of the stainless steel plate, and a flange portion of the water tank is superimposed on the back side of the edge of the water tank mounting opening of the top plate, In the kitchen top plate with a water tank in which the edge of the water tank mounting opening and the flange are welded to each other,
A polishing band in which the precoat is polished and removed is formed on the edge of the water tank mounting opening of the top plate, and the edge of the water tank mounting opening in which the polishing band is formed and the flange are welded together. A kitchen top with a water tank.   The said top plate is formed with the embossed stainless steel plate, The top plate for kitchens with a water tank of Claim 4 characterized by the above-mentioned.

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