JPH0433607B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for forming a curved portion of a decorative board, for example, a decorative board that can be used as a shelf board.

(Prior Art and Problems to be Solved by the Invention) When a decorative board is used, for example, as a shelf board, the tip of the board is It is desirable to provide a curtain plate portion with a curved portion. For this reason, conventionally, a wide belt-like groove is formed on the back side of the part where the curved part of the plate material is to be formed, and after the curved part is molded into a formwork, a synthetic resin agent is filled and hardened in the belt-like groove. It has been known.

However, with this method, most of the curved part is made of synthetic resin, which results in poor durability.
There was a problem that a large amount of synthetic resin agent was required.

In view of the above problems, the present invention has excellent durability,
It is an object of the present invention to provide a method for forming a curved portion that can save synthetic resin agents.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a plurality of grooves arranged in parallel in the width direction on the back surface of the part forming the curved part of the plate material, and a room-temperature curing type molded in the grooves. After filling the synthetic resin agent, the grooved portion is curved at a predetermined angle to form a curved portion, and a part of the room temperature curing synthetic resin agent filled in the groove is forced out from the groove. A step of filling the back corner of the curved portion and holding the room temperature curable synthetic resin agent filled in the back corner of the curved portion and the room temperature curable synthetic resin agent remaining in the groove until they are continuously cured as one unit. It consists of

(Function) Therefore, according to the present invention, the curved portion and the reinforcing portion can be formed in one bending operation.

(Example) Examples according to the present invention will be described below with reference to the accompanying drawings.

The first embodiment of the present invention is applied to a decorative board 1 that can be used as a shelf board, in which a decorative sheet 3 is pasted on the surface of a board material 2 made of plywood, and a portion where a curved portion 4 is formed. A plurality of grooves 5 are arranged in parallel in the board width direction on the back side of the board (see Fig. 2). However, the depth of the groove must be such that at least the decorative sheet 3 remains.

Note that the board material 2 is not limited to plywood, but may be a single board such as solid board, particle board, fiberboard, etc., and a decorative sheet 3 may be attached to the surface thereof. .

The decorative sheet 3 is preferably a veneer or a vinyl chloride sheet that has appropriate elongation and strength so as not to be damaged when the decorative sheet 1 is bent.

Further, the shape and number of the grooves 5 may be determined according to the curved surface shape, and are not particularly limited.

Next, the groove 5 is filled with room temperature curing synthetic resin agent 6 (see FIG. 3). Examples of the room temperature curable synthetic resin agent 6 include polyester resin, in which an inorganic filler such as calcium carbonate,
A foaming agent, curing agent, curing accelerator, etc. may be added as appropriate.

Then, by bending and curving at a predetermined angle so that the groove 5 is on the inside, a curved part 4 is formed, and a part of the synthetic resin agent 6 filled in the groove 5 is forced out from the groove 5. The synthetic resin agent 6 filled in the back corner of the curved portion 4 and the synthetic resin agent 6 remaining in the groove 5 are held until they are continuously and integrally cured. As a result, the curtain plate portion 7 is formed at the tip of the plate material 2.

As a method of holding the curved plate 2, for example, as shown in FIG. There is a method in which the spacer 2 is placed on top of the spacer 14 in a sandwich-like pattern, and the spacer 14 is stacked and held thereon.

According to this method, it is convenient because a plurality of plates 2 can be held at the same time, and there is also an advantage that the pressed out synthetic resin agent 6 is easily integrated with the synthetic resin agent 6 in the groove 5 and hardened. .

Note that one corner of the spacer 14 is provided with a chamfer 15 to prevent the synthetic resin agent 6 from adhering, but the cross-sectional shape of one corner is shaped to follow the inner surface of the curved portion 4, and The curved portion 4 may be formed by using a spacer 14 made of a material that does not adhere to the synthetic resin agent 6.

FIG. 6 shows a second embodiment according to the present invention. Whereas in the first embodiment, the curved portion 4 is formed only by the groove 5, in this embodiment, the curved portion 4 is formed by the groove 5 and the band-shaped groove 8. This is the case when forming part 4.

According to this embodiment, the synthetic resin agent 6 does not protrude from the band-shaped groove 8 and the inner surface of the curved portion 4 becomes smooth, making installation easy and convenient.

In addition, in each of the above-mentioned embodiments, the case where the decorative sheet 3 is first applied to the surface of the plate material 2 was shown, but this is not necessarily the case. After forming the curved part 4 without providing a decorative layer, Depending on the situation, painting, applying a decorative sheet, etc. may be performed.

(Effects of the Invention) As is clear from the above explanation, according to the method for forming a curved part according to the present invention, when a plate material is bent and curved, a part of the synthetic resin agent squeezed out from the groove is transferred to the curved part. The synthetic resin agent filled in the back corner portion of the groove is continuously hardened together with the synthetic resin agent remaining in the groove to form a reinforcing portion.

Therefore, according to the present invention, the curved portion and the reinforcing portion can be formed in one bending operation, so the curved portion can be formed with fewer man-hours, resulting in high productivity.

Moreover, the synthetic resin agent filled in the back corner of the curved part and the synthetic resin agent remaining in the groove are continuously cured together, increasing the stiffness of the curved part and improving the durability of the curved part of the plate material. do.

In other words, even if an external force is applied to the curved part to close the curtain plate, the synthetic resin will harden into an approximately inverted wedge shape between the uncut portions of the groove, so the hardened synthetic resin will not leave the groove. It does not fall off, the angle of the curved part is easily maintained, and the strength of the curved part is high.

In addition, even if an external force is applied to the curved part to spread the curtain plate, the synthetic resin filled in the back corner of the curved part continues to harden together with the synthetic resin in the groove. It is possible to effectively prevent the so-called "rolling" phenomenon in which the curtain plate part tries to spread out.

Moreover, according to the present invention, it is only necessary to fill the grooves formed as appropriate with the synthetic resin agent, so that the synthetic resin agent can be saved more effectively than in the conventional method of forming a curved portion.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a decorative board according to the present invention;
Figures 2 to 5 show the first embodiment of the present invention, Figure 2 is an enlarged view of the main part showing the state in which the groove is formed, and Figure 3 is the main part showing the state in which the synthetic resin agent is filled. An enlarged view, FIG. 4 is an enlarged view of the main part showing a state in which a curved part is formed by curving a plate material, FIG. 5 is an explanatory view of the use of the holder used in the present invention, and FIG. FIG. 7 is an enlarged view of a main part showing a state in which a curved portion of the second embodiment is formed. DESCRIPTION OF SYMBOLS 1... Decorative board, 2... Board material, 3... Decorative sheet, 4... Curved part, 5... Groove, 6... Synthetic resin agent, 7... Curtain board part, 8... Band-shaped groove, 13... ...Holder, 14...Spacer.

Claims (1)

[Scope of Claims] 1. A plurality of grooves are provided in parallel in the width direction of the board on the back surface of the portion forming the curved part of the board material, and the grooves are filled with room-temperature curing synthetic resin agent, and then the grooves are provided. The part is curved at a predetermined angle to form a curved part, and a part of the cold-curing synthetic resin filled in the groove is forced out from the groove and filled into the back corner of the curved part, and the curved part is formed by bending the part at a predetermined angle. 1. A method for forming a curved portion, comprising: holding a cold-curing synthetic resin agent filled in a back corner of the curved portion and a cold-curing synthetic resin agent remaining in the groove until they are continuously cured as one body. 2. The method for forming a curved portion according to claim 1, wherein the plate material is plywood. 3. The method for forming a curved portion according to claim 1, wherein the plate material is a single plate with a decorative sheet pasted on the surface.