JPH10201558A - Top plate for kitchen furniture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive top plate which improves the operation efficiency of the production of the top plate, looks high-grade in terms of its appearance and secures safety for using. SOLUTION: At the time of bend-processing a single metallic plate so as to provide a front lowering part 1b, a side plate part 1c and a folding back piece 1d, a straight cutting part 1f, which is nearly parallel wit a bent line B1 positioned at a part the piece 1d and the part 1c on the extended line of a bent line B4 between an upper face part 1a and the part 1b and positioned closely to the bent line B1 of the parts 1a/1c and the parts 1b and the piece 1d, is previously provided successively after a notch part 1e for bending the piece 1d facing the direction of the part 1c to bend-process the bending angle part of the part 1a and the part 1b into the form of R with rounding. After bending processing, it is melt-fixed by projection welding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a top plate for kitchen furniture made of a metal plate used for a sink or a counter.

[0002]

2. Description of the Related Art Conventionally, the top plate of this kind of kitchen furniture is shown in FIG.
As shown in FIG. 1, an upper surface portion 1 serving as a main surface portion of a top plate 11 is formed by bending a single metal plate such as a stainless steel plate.
A front descending portion 11b is formed to hang down from the front end of 1a, and a side plate portion 11c is formed to hang down at both left and right ends, and a bent corner portion C between the upper surface portion 11a and the front descending portion 11b is formed with a rounded bending radius.
After being formed into a shape, the joint B portion between the front descending portion 11b and the side plate portion 11c of the front end portion of the side surface of the top plate 11 is filled with a filler material for generating weld metal at the joint B portion by TIG welding. After the serving, a work processing step of polishing and finishing this portion is generally adopted.

[0005] As shown in FIG. 5, a front descending portion 21 b hangs down from the front end of an upper surface portion 21 a serving as a main surface portion of the top plate 21.
And side plate portions 21c are formed to hang down on both left and right ends, and folded pieces 21 are formed on both left and right ends of the front descending portion 21b.
After forming d, the folded piece 21d is bent at a right angle in the direction of the side plate 21c and overlapped on the side plate 21c, and then the folded piece 21d is fixed to the side plate 21c by projection welding or the like. Are known.

[0004]

However, in the former method described in the prior art, the former method shown in FIG. 4 in which the seam B is tig-welded and then polished and finished requires skill in welding and polishing operations. In addition, the polishing operation is time-consuming, and the polishing operation has a problem in that the working environment is badly contaminated by dust generated during polishing, so that the operation is hated by the operator.

On the other hand, in the latter method shown in FIG. 5, the bent corner portion C between the upper surface portion 21a of the top plate 21 and the forward descending portion has a sharp, non-rounded shape due to restrictions on the developed shape of the top plate material. As a result, there is a problem in that it has a problem in safety in use and gives a cheap impression in appearance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is capable of reducing the cost by improving the work efficiency of manufacturing a top plate and utilizing an unskilled worker, and also has an external appearance. It is another object of the present invention to provide a kitchen furniture top plate which has a high-class feeling and can ensure safety in use.

[0007]

In order to achieve the above object, a top plate of kitchen furniture according to the present invention comprises a front descending portion hanging down to a front end of an upper surface portion, and side plates hanging down to left and right ends of the upper surface portion. Part, a folded piece bent at right angles from the left and right ends of the front descending part toward the side plate part is formed by bending one metal plate, and the folded piece is overlapped on the upper surface of the front end of the side plate part. A top plate of kitchen furniture to be combined, which is provided beforehand between the folded piece and the side plate portion in a deployed state before bending of the metal plate to bend the folded piece toward the side plate portion. Continuing with the notch portion, the folded portion and the side plate portion are located on the extension line of the folding curve of the upper surface portion and the forward descending portion, and the upper surface portion, the side plate portion, the forward descending portion, and the folded portion are located. Linear shape close to and approximately parallel to the fold curve A notch is provided in advance, and the straight notch is bent into an R shape at a bent corner between the upper surface and the front descending portion, and the straight notch is bent in the R shape. Is formed as an opening hole in the form of a quadrant arc in the folded piece and the side plate along the R shape, and an inward step formed in the overlapping portion of the front end of the side plate with the folded piece. Thus, the folded piece is overlapped so as to be substantially flush with the side plate portion, and the overlapped portion of the folded piece and the side plate portion is fixed by welding.

According to a second aspect of the present invention, the overlapped portion of the folded piece and the side plate portion is provided so that simultaneous welding of a plurality of points and a plurality of points can be easily performed and work efficiency is improved. Is characterized in that the welding is performed by projection welding.

[0009] In the top plate of the kitchen furniture according to the present invention, in the unfolded state of the metal plate serving as the material of the top plate before bending, the folded piece on the extension of the folding curve between the upper surface and the front descending portion is formed. A straight cut portion located near the side plate portion and close to and substantially parallel to the fold curve between the upper surface portion, the side plate portion, and the front descending portion and the folded piece, the folded piece is oriented toward the side plate portion. It is provided in advance in a continuous manner to the notch for bending toward the front, and by appropriately setting the width dimension of this linear cut, the bending of the front descending part hanging down from the front end of the upper surface part is bent. At the time of processing, it is possible to form the bent corner portion between the upper surface portion and the forward descending portion into a rounded R shape according to the widthwise dimension of the linear cut portion. In addition, since the folded piece is overlapped so as to be substantially flush with the side plate portion, and the overlapped portion is fixed by welding, the conventional TIG welding which required skill in welding and polishing work is performed by an unskilled person. It can be replaced by projection welding, spot welding, etc. Note that, as described above, the straight cut portion provided in advance in the unfolded state of the metal plate before bending is deformed into a quadrant arc-shaped opening hole after bending to form a side front end as a top plate. Although it is exposed in the portion, it is relatively inconspicuous in appearance because it is located on the side surface portion as the top plate, and there is no practical problem because the size of the opening portion is small.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a kitchen furniture top plate according to the present invention will be described in detail with reference to FIGS.

FIG. 1A is a development view of a main part showing a state before bending a metal plate as a material of a top plate when manufacturing a top plate of kitchen furniture according to the present invention, and FIG. FIG. 1C is an explanatory cross-sectional view showing a state after bending of an upper surface portion and a front descending portion in FIG. 1A, and FIG. 1C shows a state after bending of an upper surface portion and a side plate portion in FIG. 1 (d) is a perspective view of a main part showing a state before bending and after welding, and FIG. 2 (a) is a sectional view of P in FIG. 1 (a).
FIG. 2B is a perspective view of a main part showing a state of the top plate after the welding process of FIG. 1D.

In FIG. 1A, the material of a top plate 1 made of a stainless steel plate having a thickness of 0.5 mm is formed by folding curves B ₄ , B ₃ and B _{4 at} the front end side of an upper surface portion 1a serving as a main surface portion of the top plate. B ₁ , a bent portion ₁ b, a bent piece 1 j, and an upright piece 1 k are respectively formed in a developed shape, and the left and right ends (only one side is shown in the drawing) of the upper surface 1 a are bent curves B. the deployment shape side plate 1c and the polymerization piece 1m are respectively formed through the _first and B _2, and is further bent at a right angle in the direction of the side plate portion 1c in the right and left ends of the Maekudari portion 1b It is formed in a developed shape having a folded piece 1d. Also,
As shown in FIG. 2A, the front end of the side plate portion 1c has a thickness of the top plate 1 such that the folded piece 1d after the bending process is superimposed on the side plate portion 1c so as to be substantially flush. 0.5m
m) An overlapping portion 1g having a step portion 1h stepped inward on the inner side is formed, and further, an appropriate number of projections 1i for welding are formed on the overlapping portion 1g. Drawing and projection 1 of stepped portion 1h in the overlapping portion 1g
As shown in FIG. 1A, side cuts i are formed to form a metal plate, which is a material of a top plate, into a developed shape having a notch 1e and a linear notch 1f described later. Performed during the process.

In this embodiment, the dimension between the fold curves B ₄ and B ₃ in FIG. 1A is assumed to be 25.5 mm because the fold curve of B ₄ assumes a bending radius of 7 mm. B ₃ and (the dimensions of the bent piece 1j) dimension between B ₁ represents 20m
m, the dimensions of the upright piece 1k is 5 mm, the dimension between B ₁ and B ₂ (the height dimension of the side plate portion 1c) is 27 mm, the dimensions of the polymerization piece 1m is formed in the dimension in the deployed configuration to be 7.5 mm.

In the present invention, when the bending process at a right angle bend Maekudari portion 1b from the upper surface portion 1a at bending lines B ₄ parts in the FIG. 1 (a), the bending shown by R in FIG. 1 (b) As shown in FIG. 1A, between the folded piece 1d and the overlapping portion 1g at the front end of the side plate portion 1c so that the round portion can be bent into an R shape with a rounded bending radius (7 mmR). in part, the folded piece 1d is continuous with the rear side of the cutout portion 1e for bent at right angles to the direction of the side plate portion 1c, and the extension of the folding lines B ₄ between the upper surface portion 1a and the Maekudari portion 1b folding over the portions of both the folded piece 1d and the side plate portion 1c in line curve B ₁ in parallel with the linear cut section 1
f is formed in advance. When the bending radius R on the outer surface side of the bent corner portion indicated by R in FIG. 1B is assumed to be 7 mm as described above, this linear cut portion 1f has the shape shown in FIG.
1 substantially laterally equalized on an extension line of the folding lines B ₄ illustrated in (a)
It has a width of 1.5 mm, and a 1.0 mm width in which both left and right ends are formed into a 0.5 mmR semicircular shape. FIG.
The angle A of the folded piece 1d shown in FIG.
°, and the portion of the overlapping portion 1g where this portion is overlapped is also formed so as to be 45 °, and the portion indicated by R in the overlapping portion 1g is formed into an R shape of 4 mm. Is formed.

Next, a description will be given of the bending process of the top plate 1 using a metal plate material manufactured by cutting into the developed shape shown in FIG. 1A. The upper surface portion 1a of the top plate 1 shown in FIG.
Stage diaphragm 1n and draining bead 1p during press molding for molding, bending lines B ₁ part between the upper surface portion 1a and the side plate portion 1c in FIG. 1 (a) for the periphery of the drainage, and bent pieces 1j
FIG. 1 shows a bent curve B1 portion between the _first and the standing pieces 1k bent at a right angle.
Side plate portions 1c shown in (c), after forming the erected pieces 1k shown in folded piece 1d and FIG in (b) shown in FIG. 1 (d), the by squashing the sharp bend in the bending lines B ₂ parts A polymer piece 1m shown in FIG. 1 (c) is formed.
The bent piece 1j shown in Fig. 1 (b) is formed by a right angle bend at the bending lines B ₃ portion between b and bent pieces 1j, further bending lines B ₄ portions between the upper surface portion 1a and the Maekudari portion 1b Is changed by the linear cut portion 1f to the bending radius R shown in FIG.
Is bent at a right angle so as to be 7 mm to form the front descending portion 1b.

After the above-mentioned bending process, as shown in FIG. 1 (d), a folded piece 1d bent at a right angle toward the side plate portion 1c is formed at the front end of the side plate portion 1c to form a step portion h. A folded piece 1d and a side plate 1c
Are superimposed so that the surface sides of them are flush with each other, and this portion is welded by projection welding. In this projection welding, as shown in FIG. 1A, welding is performed while concentrating current on the projection 1i formed in the overlapping portion 1g in advance and deforming the projection 1i by an appropriate pressing force.

As shown in FIG. 2 (b), the state after welding of the folded piece 1d to the overlapping portion 1g is formed by the linear cut portion 1f shown in FIG. A bent corner portion C with the portion 1d is formed in a rounded R shape having a bending radius of 7 mmR. Then, in the unfolded state, the linear cut portion 1f is deformed by right-angle bending of the front descending portion 1d from the upper surface portion 1a, and becomes 1/1 between the folded piece 1d at the front end portion of the side surface as the top plate 1 and the side plate portion 1c. It is represented as a four-arc opening hole 1f '. In addition,
A quadrant arc-shaped opening hole 1f 'formed by deforming a straight cut portion by bending the upper corner portion 1a and the front descending portion 1b so that a bent corner portion C is formed into an R shape, Since it is located on the side surface of the top plate 1, it is inconspicuous in appearance, and since the width of the quadrant arc-shaped opening itself is about 1 mm or less, there is no practical problem.

When the top plate manufactured in the above-described process is used as a top plate of a sink as kitchen furniture, a separately manufactured water tank 2 is attached by seam welding or the like as shown in FIG.

[0019]

As described above, the top plate of the kitchen furniture according to the present invention is located at the portion between the folded piece and the side plate portion on the extension of the folding curve between the upper surface portion and the front descending portion and the upper surface portion. And a straight cut portion close to and substantially parallel to the fold curve of the side plate portion and the front descending portion and the return piece is connected to a notch portion for bending the return piece to the side plate portion side. The bent portion between the upper surface portion and the forward descending portion is bent into an R shape by the straight cut portion, and the straight cut portion is formed along the R shape in a state where the bent portion is bent into the R shape. The folded piece and the side plate are exposed as quadrant arc-shaped opening holes, and the folded piece is formed substantially in the side plate part by the inward step formed in the overlapped portion with the folded piece at the front end of the side plate. The folded piece and the side plate. The joining part is fixed by welding, so it is possible to replace conventional TIG welding with work that can be done by unskilled workers such as projection welding spot welding, etc., improving work efficiency and reducing costs by using unskilled workers Furthermore, since the corners between the upper surface and the forward descending portion are formed in a rounded R shape, there is an effect that safety in use and improvement in appearance can be achieved.

[Brief description of the drawings]

1A and 1B show an embodiment of a kitchen furniture top plate according to the present invention, wherein FIG. 1A is a main part development view showing a state before bending a metal plate as a material of the top plate, and FIG. FIG. 3A is an explanatory cross-sectional view showing a state after bending of an upper surface portion and a front descending portion in FIG. 4C, and FIG. 4C shows a state after bending of the upper surface portion and side plate portions in FIG. Explanatory sectional view, (d)
FIG. 4 is a perspective view of a main part showing a state before welding after bending.

FIG. 2A is a cross-sectional view taken along a line PP in FIG. 1A;
(B) is a perspective view showing a state after welding processing of a portion of an overlapped part in a folded piece and a side plate part.

FIG. 3 is an overall perspective view illustrating a kitchen table top according to the present invention.

FIG. 4 is an explanatory perspective view of a front end of a side surface of a top plate of kitchen furniture according to a conventional example.

5 is an explanatory perspective view of a front end of a side surface of a top plate of kitchen furniture according to another conventional example different from FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Top plate 1a ... Upper surface part 1b ... Front descending part 1c ... Side plate part 1d ... Folding piece 1e ... Notch part 1f ... Linear notch part 1f '... Opening hole 1g ... Overlapping part 1h ... Step part 1i ... Projection 1j ... bending piece 1k ... standing piece 1 m ... polymerization piece 1n ... stage aperture 1p ... draining bead 2 ... aquarium A ... angle _{B 1, B 2, B 3} , B 4 ... folding lines C ... bent corner portion R ... bending radius 11, 21 ... top plate 11a, 21a ... upper surface portion 11b, 21b ... front descending portion 11c, 21c ... side plate portion 21d ... folded piece

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yoshihiko Yamamoto 1250 Shimoedori, Shimodate-shi, Ibaraki Pref.Hitachi Kasei Kogyo Co., Ltd. (72) Inventor Yoshiyuki Sakai 1012-7 Tamado Yamagashima, Shimodate City, Ibaraki Prefecture Inside Toyoura Co., Ltd. (72) Inventor Satoshi Miyazaki 1012-7 shares in Tamado Yamagashima, Shimodate City, Ibaraki Prefecture Inside Toyoura Corporation (72) Inventor Masaki Takahashi 1012-7 Tamado Yamagashima, Shimodate City, Ibaraki Prefecture Toyoura Corporation

Claims (2)

[Claims] 1. A front descending portion hanging down to a front end of an upper surface portion, a side plate portion hanging down to left and right ends of the upper surface portion, and a right angle bent from the left and right ends of the front descending portion toward the side plate portion. The folded piece is formed by bending one metal plate,
A top plate for kitchen furniture in which the folded pieces are overlapped on the upper surface of the front end of the side plate portion, wherein the folded plate is provided in advance between the folded pieces and the side plate portion in a deployed state before bending the metal plate. The notch for bending toward the direction of the portion, the portion of the folded piece and the side plate portion on the extension of the fold curve of the top surface and the forward descending portion and the top surface portion A straight cut portion is provided in advance near the bent curve of the side plate portion and the forward descending portion and the folded piece and substantially parallel to the bent curve, and the upper surface portion and the forward descending portion are formed by the linear cut portion. An opening hole in which the bent portion is bent into an R shape, and the straight cut portion forms a quadrant arc in the folded piece and the side plate portion along the R shape in a state of being bent into the R shape. And the folded back of the side plate front end The folded-back piece is overlapped with the side plate portion so as to be substantially flush with the side plate portion by an inward step formed in the overlap portion with the piece, and the overlapped portion of the folded piece and the side plate portion is fixed by welding. Kitchen furniture top plate characterized by the following. 2. The kitchen furniture top plate according to claim 1, wherein the welding of the overlapped portion between the folded piece and the side plate is performed by projection welding.