JP7426457B1 - Doors and door manufacturing methods - Google Patents

Abstract

The present invention relates to a plate-shaped door including a handle part, and to improve the handle part.
A door 10 is composed of a core material 20 and a melamine decorative board 30 covering the surface of the core material 20. The door 10 includes a plate-shaped main body portion 11. The door 10 includes a handle portion 12 provided at an end of a main body portion 11. The handle portion 12 includes a front side edge 14 continuous to the front surface of the main body 11, a rear side edge 13 continuous to the rear surface of the main body 11, and a portion between the front side edge 14 and the rear side edge 13. It has a groove part 15 connected by a depression. The groove portion 15 includes a circular arc portion 16 that curves in an arc shape continuously with the rear side edge portion 13, and an inner wall portion 17 that extends continuously from the circular arc portion 16 to the front side edge portion 14. In the door 10, an integral melamine decorative board 30 is attached to the core material 20 from the main body part 11 to the handle part 12.
[Selection diagram] Figure 2

Description

The present invention relates to a door provided with a handle for opening and closing the door, and a method for manufacturing the door.

Patent Document 1 discloses, as a laminate applicable to a door, a laminate having a recess at the end on which a finger can be placed. A decorative board is adhered to the flat portion of the base material of the laminate. A decorative material different from the decorative board adhered to the flat portion is adhered to the end of the laminate.

International Publication No. 2009/025273

In a laminate such as that disclosed in Patent Document 1, in which the decorative board on the planar portion and the decorative material on the end portions are separate, the seam between the decorative board and the decorative material is exposed. Therefore, when you put your finger on the end, there is a risk that moisture or the like adhering to your finger may seep in through the seam.

A door for solving the above problem is a plate-shaped door composed of a core material and a melamine decorative board covering the surface of the core material, and includes a plate-shaped main body part and a melamine decorative board that covers the surface of the core material. a handle part provided at an end, the handle part having a front side edge continuous to the front surface of the main body part, a rear side edge part continuous to the rear surface of the main body part, and the front side edge part. a groove that connects the edge and the rear side edge with a recess, the groove includes a circular arc part that curves in an arc shape continuously with the rear side edge; and a groove that is continuous with the circular arc part. and an inner wall portion extending to the front side edge, and the melamine decorative board is integrally attached to the core material from the main body portion to the handle portion.

In the above configuration, there is no seam of the melamine decorative board in the handle portion. This can prevent moisture and the like from entering between the core material and the melamine decorative board.
In the example of the door, the thickness of the portion of the melamine decorative board that is attached to the handle portion is such that the thickness of the portion of the melamine decorative board that is attached to the handle portion is the same as the thickness of the main body of the melamine decorative panel in It is thinner than the part that is pasted on the part.

In one example of the door, a portion of the melamine decorative board that is attached to the handle portion is a thin wall portion, a portion of the melamine decorative board that is attached to the main body portion is a thick wall portion, and the The melamine decorative board is provided with an intermediate part between the thick part and the thin part, the thickness of which is reduced so as to be inclined from the thick part to the thin part, and the entire thickness of the thin part is reduced. The thickness is constant.

According to the above configuration, even if the handle part has a curved shape, the melamine decorative board can be attached along the shape.
In one example of the door, the inner wall portion is inclined so that the closer it is to the arcuate portion, the closer it is to the rear side edge, and the inclination angle of the inner wall portion is 24 degrees with respect to the plane in which the main body portion extends. The temperature is above 35 degrees.

According to the above configuration, since the inner wall portion is inclined, it is easy to put a finger on the handle portion. Furthermore, the door can be easily opened and closed by pulling the hand with the finger on the handle part.
A method for manufacturing a door to solve the above problem is composed of a core material and a melamine decorative board covering the surface of the core material, and includes a plate-shaped main body part and a melamine decorative board that covers the surface of the core material. a hand grip portion, the hand grip portion includes a front side edge continuous to the front surface of the main body, a rear side edge continuous to the rear surface of the main body, the front side edge and the a groove connected to the rear side edge by a recess; the groove includes a circular arc portion that curves in an arc shape continuously with the rear side edge; and a groove that connects the rear side edge with the front side an inner wall portion extending to an edge, and the melamine decorative board is affixed to the core material from the main body portion to the handle portion, the door comprising: an inner wall portion extending to an edge; A decorative board processing step in which the thickness of the portion to be adhered to the handle portion is uniformly thinned, a first adhesion step to adhere the melamine decorative board to the main body portion, and a first adhesion step to adhere the melamine decorative board to the handle portion. A second adhesion step is performed, and the second adhesion step includes performing the decorative laminate processing on the core material to which the melamine decorative laminate is adhered to the main body portion in the first adhesion step. The gist is to adhere the melamine decorative board thinned through the process to the handle part while bending it along the shape of the handle part.

According to the above configuration, it is possible to manufacture a door in which there is no seam of the melamine decorative board in the handle portion.

According to the door and door manufacturing method of the present invention, it is possible to suppress the infiltration of moisture and the like between the core material and the melamine decorative board that constitute the door.

FIG. 1 is a perspective view showing one embodiment of a door. FIG. 2 is a cross-sectional view of the door of FIG. 1. FIG. 3 is an enlarged view of the handle portion of the door shown in FIG. 1. FIG. 4 is a flowchart showing a manufacturing method for manufacturing the door of FIG. FIG. 5 is a diagram illustrating a manufacturing method for manufacturing the door of FIG. 1. FIG. 6 is a diagram illustrating a manufacturing method for manufacturing the door of FIG. 1. FIG. 7 is a sectional view showing a door of a modified example.

Hereinafter, a door 10, which is an embodiment of the door, will be described with reference to FIGS. 1 to 6.
1 and 2 show a plate-shaped door 10. FIG. The door 10 can be applied to furniture such as a storage shelf, for example. The door 10 can also be used as a door as a fitting. The door 10 can be used as a swinging door or as a sliding door. Note that a front plate of a drawer included in a storage shelf or the like is also an example of a door. That is, the door 10 can also be applied to the front plate of a drawer.

[door]
As shown in FIGS. 1 and 2, the door 10 includes a plate-shaped main body 11. As shown in FIGS. The door 10 includes a handle portion 12.

The handle portion 12 is provided at the end of the main body portion 11. One handle part 12 is provided for one door 10. For example, the handle portion 12 is provided over the entire width of one end of the main body portion 11. Although the details will be described later, the handle portion 12 has a shape having a recess into which a hand can be placed in order to open and close the door 10.

The door 10 includes an opposite end 19 at the end of the main body 11 opposite to the end where the handle part 12 is provided. The opposite end 19 is an example of a position where a hinge can be attached, for example, when the door 10 is used as a swinging door.

In FIGS. 1 and 2, arrows indicating the first direction X, the second direction Y, and the third direction Z are shown. The three directions, the first direction X, the second direction Y, and the third direction Z, are directions that are orthogonal to each other.

The first direction X indicates one of the thickness directions of the plate-shaped door 10. The thickness direction is also referred to as the front-back direction. The second direction Y and the third direction Z indicate directions extending along the sides of the door 10. Specifically, the second direction Y indicates one of the directions in which the side on which the handle portion 12 is provided extends. The direction in which the side extends is sometimes referred to as the width direction. The third direction Z indicates one of the directions in which the side connecting the handle portion 12 and the opposite end portion 19 extends. The direction in which the side extends is sometimes referred to as the up-down direction.

In the plate-shaped door 10, a surface parallel to the second direction Y and the third direction Z is referred to as a front surface 10c. The surface of the door 10 opposite to the front surface 10c is referred to as a rear surface 10a. The front surface 10c is the front side surface in FIG. The rear surface 10a is the rear surface in FIG. Among the surfaces connecting the front surface 10c and the rear surface 10a, a surface parallel to the first direction X and the third direction Z is referred to as a side surface 10b. The door 10 has a pair of side surfaces 10b at both widthwise ends of a front surface 10c and a rear surface 10a.

The first direction X shown in FIGS. 1 and 2 is a direction from the rear surface 10a to the front surface 10c. The second direction Y shown in FIGS. 1 and 2 is a direction from the right hand to the left hand facing the front surface 10c of the door 10 with the handle portion 12 facing upward. A third direction Z shown in FIGS. 1 and 2 is a direction from the opposite end portion 19 toward the handle portion 12.

[Door material]
As shown in FIG. 2, the door 10 is composed of a core material 20 and a melamine decorative board 30. The melamine decorative board 30 is attached to the core material 20 so as to cover the surface of the core material 20. In other words, the main body part 11 of the door 10 is constituted by the core material 20 and the melamine decorative board 30 that covers the surface of the core material 20. Further, the handle portion 12 of the door 10 is constituted by a core material 20 and a melamine decorative board 30 that covers the surface of the core material 20.

As the core material 20, for example, a wooden board such as particle board or MDF can be used. As another example, the core material 20 may be made of plywood. The core material 20 may be formed by molding a resin material.

An example of the melamine decorative board 30 is a board with a laminated structure including a core layer and a decorative layer laminated on the surface of the core layer. The core layer is made of, for example, paper impregnated with phenolic resin. The decorative layer is made of paper impregnated with melamine resin. In addition, in each drawing, the laminated structure of the melamine decorative board 30 is omitted from illustration. As the melamine decorative board 30, the details will be described later, but for example, one having a thickness of 0.2 mm or more and 1.0 mm or less can be used.

The melamine decorative board 30 may include other layers in addition to the core layer and the decorative layer. For example, a protective layer covering the decorative layer may be included. The melamine decorative board 30 is not limited to a laminated structure, and may be a single layer board made of melamine resin.

In the door 10, the front surface 10c is covered with a melamine decorative board 30. Specifically, in the door 10, an integral melamine decorative board 30 is attached to the core material 20 from the main body part 11 to the handle part 12. As an example, as shown in FIG. 2, a melamine decorative board 30 integral with the opposite end 19, the main body 11, and the handle part 12 is attached to the core material 20.

For example, a melamine decorative board may be attached to the side surface 10b as well. For example, a melamine decorative board may be attached to the rear surface 10a as well. For example, a sheet material other than the melamine decorative board may be attached to the rear surface 10a. The melamine decorative board that can be attached to the side surface 10b and the rear surface 10a does not have to be integrated with the melamine decorative board 30 that is attached to the handle portion 12. The core material 20 may be exposed on either one of the side surfaces 10b and the rear surface 10a, or both of the side surfaces 10b and the rear surface 10a.

The core material 20 and the melamine decorative board 30 can be bonded together using an adhesive, for example. Note that, as the adhesive for attaching the melamine decorative board 30 to the core material 20, any known adhesive that can be used for bonding melamine decorative boards can be suitably employed. Specific examples of adhesives include vinyl acetate adhesives for woodworking, rubber adhesives, hot melt adhesives, and the like.

[Handle part]
As shown in FIG. 2, the handle portion 12 includes a front side edge portion 14 continuous from the upper end of the front surface of the main body portion 11. As shown in FIG. The handle portion 12 includes a rear side edge portion 13 that is continuous from the upper end of the rear surface of the main body portion 11 . The handle portion 12 includes a groove portion 15 that connects the front side edge portion 14 and the rear side edge portion 13 with a recess.

An example of the rear side edge portion 13 will be explained. The rear side edge 13 includes a first parallel surface 13a located on the same plane as the rear surface 10a of the door 10. The rear side edge portion 13 includes a second parallel surface 13b. The second parallel surface 13b is located at a position moved in the first direction X with respect to the first parallel surface 13a, and is a surface parallel to the first parallel surface 13a. The rear side edge portion 13 includes an end surface 13c. The end surface 13c is a surface extending in the first direction X from the end of the first parallel surface 13a in the third direction Z toward the second parallel surface 13b. The rear side edge 13 includes a first R surface 13r that connects the second parallel surface 13b and the end surface 13c. In the cross section shown in FIG. 2, a value representing the degree of curvature of the first R surface 13r as a radius of curvature is defined as a first radius of curvature R1.

An example of the front side edge portion 14 will be explained. The front side edge portion 14 includes a third R surface 14r that connects the front surface 10c of the door 10 and the groove portion 15. In the cross section shown in FIG. 2, a value representing the degree of curvature of the third R surface 14r as a radius of curvature is defined as a third radius of curvature R3.

The groove portion 15 will be explained. The groove portion 15 includes an arc portion 16 that is continuous with the rear side edge portion 13 and curved into an arc shape. Specifically, the arc portion 16 is continuous with the second parallel surface 13b. The groove portion 15 includes an inner wall portion 17 that extends continuously from the arcuate portion 16 to the front side edge portion 14 . Specifically, the inner wall portion 17 connects the arc portion 16 and the third R surface 14r. The inner wall portion 17 linearly connects the arc portion 16 and the third R surface 14r in the cross section shown in FIG. In the cross section shown in FIG. 2, a value indicating the degree of bending of the circular arc portion 16 by a radius of curvature is defined as a second radius of curvature R2.

[Inclination angle of inner wall]
As shown in FIG. 2, the inner wall portion 17 is inclined such that the closer it is to the arcuate portion 16, the closer it is to the rear side edge portion 13. Let the inclination angle of the inner wall portion 17 be an angle θ. The angle θ indicates the inclination angle of the inner wall portion 17 with respect to the plane in which the main body portion 11 extends.

Although the angle θ is not particularly limited, an angle of 24 degrees or more and 35 degrees or less can be adopted, for example. The lower limit value indicating the range of the angle θ is preferably 25 degrees, more preferably 26 degrees, and still more preferably 27 degrees. The upper limit value indicating the range of the angle θ is preferably 33 degrees, more preferably 31 degrees, and even more preferably 29 degrees.

[Radius of curvature of handle part]
Although the values of the first radius of curvature R1, the second radius of curvature R2, and the third radius of curvature R3 shown in FIG. 2 are not particularly limited, for example, the second radius of curvature R2 indicating the radius of curvature of the circular arc portion 16 is the largest. For example, the first radius of curvature R1, the third radius of curvature R3, and the second radius of curvature R2 have larger values in this order.

As an example, the second radius of curvature R2 is preferably smaller than 4.5 mm. It is more preferable that the second radius of curvature R2 is 4.0 mm or less. It is preferable that the second radius of curvature R2 is larger than 3.4 mm. It is more preferable that the second radius of curvature R2 is 3.9 mm or more.

As an example, the third radius of curvature R3 is preferably larger than 1.0 mm. It is more preferable that the third radius of curvature R3 is 2.0 mm or more. It is preferable that the third radius of curvature R3 is smaller than 2.4 mm. It is more preferable that the third radius of curvature R3 is 2.2 mm or less.

[Thickness of melamine decorative board]
As shown in FIG. 3, the portion of the melamine decorative board 30 that is adhered to the handle portion 12 is a thin portion 33. The part of the melamine decorative board 30 that is adhered to the main body part 11 is defined as a thick part 31. That is, the integrated melamine decorative board 30 includes a thick portion 31 and a thin portion 33.

The thickness of the thin portion 33 is preferably thinner than the thick portion 31 in the entire thin portion 33 . That is, it is preferable that the thin portion 33 is thinner than the thick portion 31 and spreads out as a surface. For example, the thin portion 33 corresponds to a portion made thinner by scraping off a portion of the core layer constituting the melamine decorative board 30 . In this case, it is preferable that the decorative layers have the same thickness in the thin portion 33 and the thick portion 31. The thin portion 33 may be formed by scraping off the decorative layer that constitutes the melamine decorative board 30. It is preferable that the entire thickness of the thin portion 33, which is the portion bonded to the handle portion 12, be constant. The overall thickness of the thick portion 31 is preferably constant.

As shown in FIG. 3, in the door 10, the melamine decorative board 30 has a thinner thickness between the thick part 31 and the thin part 33 so as to be inclined from the thick part 31 to the thin part 33. It is preferable that the intermediate portion 32 is provided with a In FIG. 3, a starting point 30a to an ending point 30b indicating a range thinner than the thick portion 31 of the melamine decorative board 30 is shown.

In FIG. 3, the thickness of the thick portion 31 is indicated as a first decorative board thickness E. In FIG. 3, the thickness of the thin portion 33 is indicated as a second decorative board thickness F. That is, the second decorative board thickness F is smaller than the first decorative board thickness E.

A specific example of the first decorative board thickness E will be explained. The first decorative board thickness E is preferably 0.5 mm or more and 1.0 mm or less. The lower limit of the range of the first decorative board thickness E is preferably 0.65 mm, more preferably 0.8 mm. The upper limit of the range of the first decorative board thickness E is preferably 0.95 mm, more preferably 0.9 mm.

A specific example of the second decorative board thickness F will be explained. The second decorative board thickness F is preferably 0.2 mm or more and 0.5 mm or less. The lower limit of the range of the first decorative board thickness E is preferably 0.25 mm, more preferably 0.3 mm. The upper limit of the range of the first decorative board thickness E is preferably 0.45 mm, more preferably 0.4 mm.

In the door 10, the ratio (F/E) of the second decorative board thickness F to the first decorative board thickness E is, for example, 0.2 or more and 0.7 or less. The upper limit of the range of the ratio (F/E) is preferably 0.6, more preferably 0.5. The lower limit of the range of the ratio (F/E) is preferably 0.3, more preferably 0.4.

[Other dimensions]
As shown in FIG. 2, the deepest position of the circular arc portion 16 in the groove portion 15, that is, the lower end in the vertical direction is defined as a first point P1. Of the front side edge 14, the end of the third R surface 14r in the third direction Z, that is, the upper end in the vertical direction is defined as a second point P2.

In FIG. 2, the distance in the third direction Z between the first point P1 and the second point P2 is indicated as a first length B. The distance in the third direction Z between the second point P2 and the end surface 13c is indicated as a second length C.

In FIG. 2, the distance in the first direction X between the first parallel surface 13a and the second parallel surface 13b is indicated as a first thickness A. The distance in the first direction X between the rear surface 10a and the front surface 10c is indicated as a second thickness D.

In the door 10, the ratio (D/A) of the second thickness D to the first thickness A is preferably 4.1 or more. The ratio (D/A) is more preferably 4.5 or more. The second thickness D is, for example, 19 mm, although it is not particularly limited.

In the door 10, the ratio [B/(B+C)] of the first length B to the sum of the first length B and the second length C (B+C) is preferably larger than 0.25. The first length B is, for example, 10 mm, although it is not particularly limited.

[Door manufacturing method]
An example of a method for manufacturing the door 10 will be explained.
As shown in FIG. 4, the method for manufacturing the door 10 includes a core material processing step S1, a decorative board processing step S2, a first bonding step S3, and a second bonding step S4. For example, the door 10 can be manufactured by performing each step in the order of core material processing step S1, decorative board processing step S2, first bonding step S3, and second bonding step S4.

The core material processing step S1 is a step of forming the core material 20. For example, the core material 20 can be formed by cutting a wooden board.
The decorative board processing step S2 is a step of processing the melamine decorative board 30 to form the intermediate portion 32 and the thin portion 33.

An example of the decorative board processing step S2 will be explained. In the decorative board processing step S2, the melamine decorative board 30 can be shaved using, for example, an electric sander. An example of an electric sander is a belt sander. The thin portion 33 and the intermediate portion 32 can be carved out using a belt sander. Specifically, first, the melamine decorative board 30 is placed on a workbench with the core layer facing upward. Next, a belt sander is applied to the area where the thin portion 33 and the intermediate portion 32 are to be formed to perform cutting. Specifically, a thin portion 33 is formed to be uniformly thin, and an intermediate portion 32 is formed to be gradually thinner from the thick portion 31 to the thin portion 33. As another example of the decorative board processing step S2, the melamine decorative board 30 may be cut using a cutter.

The first adhesion step S3 and the second adhesion step S4 are steps for adhering the melamine decorative board 30 to the core material 20. For example, the melamine decorative board 30 can be attached to the core material 20 by post-forming.

An example of the first bonding step S3 will be described using FIG. 5. In the first bonding step S3, the melamine decorative board 30 is bonded to the main body portion 11. Specifically, first, an adhesive is applied to the thick portion 31 of the melamine decorative board 30 placed on a workbench with the decorative layer facing down. Next, as shown in FIG. 5, the main body part 11 and the thick part 31 are bonded together by overlapping the core material 20 from above the thick part 31 with the front surface 10c facing downward. Note that illustration of the adhesive is omitted in FIGS. 5 and 6.

An example of the second adhesion step S4 will be explained using FIG. 6. In the second bonding step S4, the melamine decorative board 30 is bonded to the handle portion 12. More specifically, a sheet of melamine decorative board 30 connected to the portion adhered to the main body part 11 in the first adhesion step S3 is bonded to the handle part 12 while being bent along the shape of the handle part 12. Specifically, first, an adhesive is applied to the melamine decorative board 30 to which the main body portion 11 is adhered to the thick portion 31 . Here, the adhesive is applied to the intermediate section 32 and the thin section 33. Next, the intermediate portion 32 and the thin portion 33 are heated. Subsequently, as shown in FIG. 6, the intermediate portion 32 and the thin portion 33 are bent while applying pressure to the intermediate portion 32 and the thin portion 33. More specifically, by lifting the intermediate part 32 and the thin part 33 upward and pressing the intermediate part 32 and the thin part 33 against the handle part 12, the intermediate part 32 and the thin part 33 are moved along the shape of the handle part 12. 33 in order. In this way, the melamine decorative board 30 is adhered to the handle portion 12 in the order of the intermediate portion 32 and the thin portion 33.

In the second adhesion step S4, a non-contact heater such as an infrared lamp or a halogen lamp can be used to heat the melamine decorative board 30, for example.
In another example of the second bonding step S4, the intermediate portion 32 and the thin portion 33 may be bent while being heated.

In the second bonding step S4, a bending process may be performed to bond the melamine decorative board 30 to the opposite end portion 19.
In the method for manufacturing the door 10, other steps may be performed in addition to the core material processing step S1, the decorative board processing step S2, the first bonding step S3, and the second bonding step S4. For example, a cooling process may be performed after the second bonding process S4. For example, in the cooling process, the melamine decorative board 30 can be cooled by blowing air.

An example of a manufacturing apparatus that manufactures the door 10 according to the above manufacturing method will be described. For example, the door 10 can be manufactured by a manufacturing device that includes a feeding device that transports the melamine decorative board 30 and the core material 20, a heater, and a bending device that bends the melamine decorative board 30. As an example, a heater and a bending device may be arranged on the conveyance path by the feeding device. In the conveyance path, it is preferable to arrange the devices in the order of the heater and the bending device from upstream. The manufacturing device may include a coating device that coats the adhesive.

[Action and effect]
The operation of this embodiment will be explained.
In the door 10, an integral melamine decorative board 30 is attached to the main body part 11 and the handle part 12. Therefore, there is no seam of the melamine decorative board 30 in the handle portion 12.

Although decorative boards made of melamine resin have excellent strength, there is a problem in that it is difficult to attach them along the rounded surface of the core material. In this regard, the melamine decorative board 30 of the door 10 is easy to bend even when it is attached to a curved shape like the handle part 12 because it has a thin part 33 that is thinned so as to spread out as a surface.

The effects of this embodiment will be explained.
(1) According to the door 10, since there is no seam of the melamine decorative board 30 in the handle part 12, it is possible to prevent nails or the like from getting caught in the handle part 12.

(2) If there are seams in the melamine decorative board 30, there is a risk that foreign substances such as water may enter through the seams. According to the door 10, it is possible to suppress the intrusion of such foreign substances. For example, in a storage shelf placed near a water area in a kitchen or the like, it is conceivable that the user may touch the door with moisture or the like attached to his or her finger. The door 10, which has excellent water resistance, can also be used as a storage shelf placed around water.

(3) Since there is no seam of the melamine decorative board 30 in the handle portion 12, the appearance of the door 10 can be improved.
(4) In the door 10, since the inner wall portion 17 of the handle portion 12 is inclined, it is easy to place a finger on the handle portion 12. Furthermore, the door 10 can be easily opened and closed by pulling the hand with the finger on the handle part 12. The door 10 was evaluated using a storage shelf in which the door 10 described in this embodiment was applied as a swinging door. As a result, we confirmed the following. There is no discomfort when the finger is placed on the handle part 12. Nails are less likely to get caught on the handle part 12. Door 10 is easy to open and close.

(5) According to the melamine decorative board 30 having the thin wall portion 33, the radius of curvature of the curved shape formed by bending the melamine decorative board 30 along the shape of the core material 20 can be formed by bending. The minimum radius of curvature can be reduced. Even if the core material 20 has a more complicated shape, the melamine decorative board 30 can be attached.

(6) In the door 10, the melamine decorative board 30 has a thin portion 33 and a thick portion 31 integrated. Therefore, compared to the case where the entire melamine decorative board is made thinner, strength can be ensured in the thick portion 31 attached to the main body portion 11.

(7) In the method for manufacturing the door 10, all operations performed in the second adhesion step S4 can be performed on the same production line. That is, application of the adhesive, heating of the melamine decorative board 30, and bending of the melamine decorative board 30 can be performed on the same production line.

(8) According to the manufacturing method of the door 10 in which the melamine decorative board 30 is attached to the handle part 12 and the main body part 11, compared with the case where separate decorative boards are attached to the handle part 12 and the main body part 11. As a result, manufacturing efficiency can be improved.

[Example of change]
This embodiment can be modified and implemented as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

- In the above-mentioned embodiment, a manufacturing method was exemplified in which the first adhesion step S3 and the second adhesion step S4 are performed in order following the decorative board processing step S2. Alternatively, the decorative laminate processing step S2 may be performed following the first adhesion step S3, and the second adhesion step S4 may be performed subsequent to the decorative laminate processing step S2. That is, a melamine decorative board having a uniform thickness may be adhered to the main body portion, and then the thin wall portion may be formed by cutting the melamine decorative board.

- In the above-mentioned embodiment, an example was shown in which a part of the melamine decorative board 30 is shaved to form the thin part 33. Alternatively, when manufacturing the melamine decorative board 30, the thick portion 31 and the thin portion 33 may be formed. That is, melamine decorative boards 30 having different thicknesses may be manufactured in advance.

- In the above-mentioned embodiment, an example was shown in which the inner wall portion 17 was formed to extend linearly in the groove portion 15 provided in the handle portion 12. The handle portion may have a shape as shown in FIG.
FIG. 7 shows a cross-sectional structure of the door 110 including the handle portion 112. The handle portion 112 includes a front side edge 114, a rear side edge 113, and a groove 115.

The door 110 is similar to the door 10 of the above embodiment in that a groove 115 is formed by an arcuate portion 116 and an inner wall portion 117 that extends continuously from the arcuate portion 116 to the front side edge 114. The door 110 differs from the door 10 of the above embodiment in that the inner wall portion 117 is curved to connect the arc portion 116 and the third R surface 114r. The inner wall portion 117 is curved so as to be depressed toward the front side edge portion 114. In FIG. 7, a straight line for comparison with the curved inner wall portion 117 is shown by a two-dot chain line. The two-dot chain line extends along the end of the third R surface 114r on the inner wall 117 side, and is a straight line that is inclined at an angle θ with respect to the plane in which the main body of the door 110 extends. It can be said that the inner wall portion 117 is inclined at an angle θ in the portion overlapping the two-dot chain line. In the cross section shown in FIG. 7, a value representing the degree of curvature of the inner wall portion 117 as a radius of curvature is defined as a fourth radius of curvature R4. The fourth radius of curvature R4 is not particularly limited, but preferably has a large value relative to the distance between the arc portion 116 in the inner wall portion 117 and the third R surface 114r. That is, it is preferable that the degree of curvature of the inner wall portion 117 is slight. For example, the fourth radius of curvature R4 is 90 mm or more.

- FIG. 7 illustrates a door 110 that includes an inner wall portion 117 that is curved so as to be depressed toward the front side edge portion 114. Alternatively, the inner wall portion may be curved so as to protrude toward the rear side edge. In this case, the radius of curvature of the inner wall portion is preferably a large value similar to the fourth radius of curvature R4. That is, it is preferable that the degree of curvature of the inner wall portion is slight.

- In the above embodiment, an example was shown in which the inner wall portion 17 of the handle portion 12 is inclined. Alternatively, the inner wall of the groove may be parallel to the front surface 10c of the door 10. That is, the third R surface of the front side edge and the circular arc portion can be connected by an inner wall portion parallel to the front surface 10c.

- In the above embodiment, the melamine decorative board 30 includes a thick portion 31, an intermediate portion 32, and a thin portion 33. It is not essential for the melamine decorative board 30 to include the intermediate portion 32. For example, there may be a step at the boundary between the thick portion 31 and the thin portion 33.

- In the above embodiment, the thickness of the portion of the melamine decorative board 30 that is adhered to the entire handle portion 12 is made thinner than the thick portion 31. Alternatively, a portion of the melamine decorative board 30 bonded to the handle portion 12 may be made thinner. For example, the portion bonded to the front side edge 14 and the groove portion 15 may be made thin, and the portion bonded to the rear side edge 13 may be made to have the same thickness as the thick portion 31 bonded to the main body portion 11.

- In the above embodiment, the thickness of the portion of the melamine decorative board 30 that is bonded to the handle portion 12 is made thinner. Furthermore, the thickness of the portion of the melamine decorative board 30 that is bonded to the opposite end portion 19 may be made thinner.

- A melamine decorative board different from the melamine decorative board 30 pasted on the main body part 11 and the handle part 12 may be pasted on the opposite end part 19. That is, it is not essential that the melamine decorative board affixed to the opposite end portion 19 be integrated with the melamine decorative board 30 affixed to the main body portion 11 and the handle portion 12.

- The direction in which the door 10 is attached to furniture or the like can be set as appropriate depending on the manner in which the door 10 is used. For example, the grip portion 12 may be attached with the groove portion 15 extending vertically, or may be attached with the groove portion 15 extending in a direction perpendicular to the vertical direction.

- In the above embodiment, "up and down", "back and forth", "width", etc. when describing directions are added for convenience of explanation, and do not necessarily correspond to the manner in which the door 10 is used.
- In the above embodiment, when the door 10 is an openable door, the opposite end 19 is illustrated as the position where the hinge is attached, but the position of the hinge is not limited to this. Depending on the manner in which the door 10 is used, a hinge may be attached to the side of the door 10 or around the side.

- In the above embodiment, the hand grip portion 12 has been described as something on which the fingers of the hand can be hung, but the size of the hand grip portion 12 is not particularly limited. For example, the depth of the groove may be such that it can be inserted up to the first joint of the finger, or it may be so deep that it can be inserted up to the second joint of the finger.

DESCRIPTION OF SYMBOLS 10...Door 10a...Back surface 10b...Side surface 10c...Front surface 11...Body part 12...Handle part 13...Rear side edge part 14...Front side edge part 15...Groove part 16...Circular part 17...Inner wall part 20...Core material 30...Melamine Decorative board 31...Thick part 32...Intermediate part 33...Thin part

Claims (4)

A plate-shaped door composed of a core material and a melamine decorative board covering the surface of the core material,
A plate-shaped main body,
A handle portion provided at an end of the main body portion,
The handle portion includes a front side edge continuous to the front surface of the main body, a rear side edge continuous to the rear surface of the main body, and a depression between the front side edge and the rear side edge. It has a connecting groove,
The groove portion has a circular arc portion that curves in an arc shape continuous with the rear side edge portion, and an inner wall portion that extends continuously from the circular arc portion to the front side edge portion,
The integral melamine decorative board is attached to the core material along the shape of the core material from the main body portion to the handle portion ,
The thickness of the portion of the melamine decorative board that is affixed to the handle portion is the thickness of the portion of the melamine decorative board that is affixed to the main body portion in the entire portion that is affixed to the handle portion. Thinner than the part where it is,
A portion of the melamine decorative board that is affixed to the handle portion is a thin wall portion, and a portion of the melamine decorative board that is affixed to the main body portion is a thick wall portion;
The melamine decorative board includes an intermediate portion between the thick portion and the thin portion, the thickness of which is tapered from the thick portion toward the thin portion;
A door characterized in that the entire thickness of the thin portion is constant . The inner wall portion is inclined such that the closer it is to the arcuate portion, the closer it is to the rear side edge portion,
The door according to claim 1 , wherein the inclination angle of the inner wall portion is 24 degrees or more and 35 degrees or less with respect to the plane in which the main body portion extends. It is composed of a core material and a melamine decorative board that covers the surface of the core material,
A plate-shaped main body,
A handle portion provided at an end of the main body portion,
The handle portion includes a front side edge continuous to the front surface of the main body, a rear side edge continuous to the rear surface of the main body, and a depression between the front side edge and the rear side edge. It has a connecting groove,
The groove portion has a circular arc portion that curves in an arc shape continuous with the rear side edge portion, and an inner wall portion that extends continuously from the circular arc portion to the front side edge portion,
A method for manufacturing a door, wherein the melamine decorative board is attached to the core material from the main body part to the handle part,
A decorative board processing step of uniformly reducing the thickness of the portion of the melamine decorative board that will be adhered to the handle portion;
a first adhesion step of adhering the melamine decorative board to the main body;
a second adhesion step of adhering the melamine decorative board to the handle portion,
In the second bonding step, the melamine decorative board thinned in the decorative board processing step is heated while heating the core material to which the melamine decorative board has been bonded to the main body part in the first bonding step. A method for manufacturing a door that is bonded to the handle portion by bending it along the shape of the handle portion. Of the melamine decorative board, the part to be adhered to the main body part is a thick part,
The decorative board processing step includes forming a thin part by uniformly reducing the thickness of the part of the melamine decorative board to be adhered to the handle part, and forming a thin part gradually from the thick part to the thin part. This is the process of forming the middle part by cutting it so that it becomes
The method for manufacturing a door according to claim 3.

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