JPH0455586A - Flush door - Google Patents

Abstract

PURPOSE:To prevent occurrence of trouble with the opening and closing of door by preventing warping by a method in which the wooden finish material and the wooden cross piece of a flush door in which the surface and back sides of the wooden crosspiece are laminated with the wooden finish material. CONSTITUTION:A wooden finish material 7 is laminated on the surface and back sides of a wooden cross piece consisting of left and right-handed vertical cross pieces 1 and 2, upper and lower horizontal cross pieces 3 and 4, and intermediate cross pieces 5 to make up a flush door. In this case, the cross pieces 1-4 and the material 7 are bonded by an elastic adhesive 8 having a maximum elongation rate of 50-270%, at 20 deg.C and a tensile strength of 20kg/cm<2> or more at 20 deg.C. The thickness of the elastic adhesive 8 layer is regulated to be 0.3-2mm.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to flush doors.

(Prior Art) Conventionally, flush doors in which finishing materials are applied to both the front and back sides of the crosspiece are light and inexpensive, and are therefore widely used as interior doors of buildings such as houses.

As described in Japanese Unexamined Patent Publication No. 63-27689, this flush door is constructed by assembling upper and lower horizontal bars and left and right vertical bars into a rectangular shape, and a middle bar is provided inside this, and both the front and back sides of the bar are assembled into a rectangular shape. It is covered with finishing material.

At this time, the wooden crosspiece and the wooden finishing material are usually bonded together using a vinyl acetate adhesive.

This flush door is attached to a pillar of a building with a hinge provided on a vertical frame, and is opened and closed by holding a handle provided near the middle of the opposing vertical frame.

(Problems to be Solved by the Invention) The above-mentioned flush door is mainly used as an indoor door, that is, an entrance/exit door provided in a partition wall between rooms or between rooms and a hallway.

However, the rooms and hallways before and after the partition wall have different temperatures and humidity. Therefore, the front and back surfaces of the interior door are exposed to different temperature and humidity conditions.

In particular, when one room is heated in the winter or cooled in the summer, the difference in temperature and humidity becomes significantly large.

In this way, when both sides of a flush door are exposed to different conditions, the finishing material applied to both sides expands and contracts to different degrees due to differences in temperature and humidity, causing the flush door to warp. ” occurs.

This "curvature" is particularly large in flush doors that have wood-based finishes covered with wood-based crosspieces.

This "curvature" is particularly noticeable on the side of the handle that does not have a hinge.

While this "warpage" is small, it does not cause any particular inconvenience, but
If the warpage becomes severe, it becomes difficult to open and close the door.

Therefore, an object of the present invention is to propose a flush door that does not cause significant "curvature" that causes difficulty in opening and closing the door.

(Means for Solving the Problems) The present invention has been made to solve the above problems and achieve the above objects. The wooden crosspiece and the wooden finishing material are bonded together using an elastic adhesive.

In the present invention, an elastic adhesive is something that hardens into an elastic state, and when a crosspiece and a finishing material are bonded together with this elastic adhesive, the crosspiece and the finishing material can be freely displaced to some extent. It is glued to. Such elastic adhesives include elastic epoxy adhesives, urethane adhesives, thiol adhesives, and the like. The preferable range for the elastic adhesive is that the maximum elongation at 20°C is 50 to 270%, and the tensile strength at 20°C is 20 kg/cm or more. The preferred thickness of the adhesive layer to exhibit elasticity is 0.3 to 2.0.
It is mm.

Suitable elastic epoxy adhesives include Cemendine rPM100, 2M200, and rEP91A manufactured by Cemendine.
J, "EPool" manufactured by Block Chemical Co., Ltd. [Nisdyne 5
There are 90A4 etc.

In the present invention, the wooden crosspiece refers to a crosspiece made of wood or processed wood, and includes wood, verticle board, hardboard, and the like.

The wood-based finishing material of the present invention includes paper products in addition to wood and plate-shaped objects processed from wood. Furthermore, these plate-shaped bodies are covered with a synthetic resin sheet such as a vinyl chloride resin sheet, are impregnated with a synthetic resin, and are impregnated with a thermosetting resin such as polyester resin or melamine resin and cured. include.

Generally, the crosspieces provided on a flush door are rectangular crosspieces including upper and lower crosspieces and left and right crosspieces, and a middle crosspiece is provided within the rectangular crosspieces. These middle bars include vertical bars, horizontal bars, and bars that combine both vertical and horizontal bars in a lattice pattern. Flush doors are less likely to warp. Therefore, in the present invention, a flush door with a middle crosspiece running through it in the vertical direction is preferred.

Also, if through holes are provided in the upper and lower horizontal bars used in the present invention,
This hole is not visible and allows air inside the flush door and outside air to enter and exit. Therefore, the difference in temperature and humidity between the two is reduced, and the occurrence of "warpage" is reduced. Therefore, in the present invention, it is preferable to provide through holes in the upper and lower horizontal bars.

In addition, plywood is preferable to the material of this crosspiece because it causes less "warpage" than wood, and among this plywood,
Parallel plywood is more preferable because it has less "warp".

(Function) In the present invention, a wood finishing material that expands and contracts significantly due to temperature and humidity is applied to both the front and back surfaces, but since the wooden crosspiece and the wood finishing material are bonded with a highly elastic adhesive, This adhesive absorbs the distortion caused by expansion and contraction of the wood finishing material, preventing the finishing material from warping.

(Example) Next, embodiments will be described with reference to the drawings.

FIG. 1 is a partially cutaway front view showing the structure of the crosspiece with a part of the finishing material of the flush door of the present invention removed, and FIG. 2 is an explanatory diagram showing the adhesive portion between the crosspiece and the finishing material.

In Figure 1, 1.2 is the left and right vertical bars, and the size of this vertical bar 1.2 is 33 mm x 37 mm x 2054 mm.
It is. A handle 11 is attached near the middle of one of the vertical bars 1, and three hinges 21 are attached to the other vertical bar 2.

3 is a horizontal bar forming the upper side. The size of this horizontal bar 3 is 30 mm x 37 mm x 692 mm.

4 is a horizontal bar forming the lower side. The size of this horizontal bar 4 is 30 mm x 37 mm x 692 mm.

Reference numeral 5 denotes middle bars provided in the vertical direction inside the flush door, and three middle bars are provided at equal intervals in the horizontal direction, passing from the upper horizontal bar 3 to the lower horizontal bar 4.

The size of this vertical bar 5 is 30mm x 37mm x 692mm
It is.

The upper horizontal bar 3 and the lower horizontal bar 4 are each provided with four through holes 31 and 41 at the middle of the junction point with the middle bar 5.

The material of these crosspieces 1 to 5 is all parallel plywood. or,
The joints of these crosspieces are all tenon-finished and firmly bonded with vinyl acetate adhesive.

In addition, as shown in FIG. 2, both the front and back surfaces of these crosspieces 1 to 5 are coated with a depth of 1 mm so that a large amount of elastic adhesive can be attached and to effectively exhibit elasticity after adhesion. groove 6
are perforated in the longitudinal direction. Note that it is effective if the depth of the groove 6 is in the range of 0.3 mm to 2 mm.

7 is a finishing material, and this finishing material 7 is made of decorative plywood covered with a vinyl chloride resin sheet and has a thickness of 3 mm.

The flush door used in this example has a finishing material 7 polymerized on both the front and back sides of the crosspiece, and both are bonded with an elastic epoxy adhesive 8 (rPM200J manufactured by Cemendine: maximum elongation rate at 20°C of 66%, tensile strength at 20°C). 30kg/cm").

Next, in order to test the performance of the flush door of this example, the following test was conducted.

・Test method There are two rooms with a partition in between, and this partition has one entrance and exit, and a Franche door is attached to this entrance. Close this flush door and keep one room at 10"C, 80%, and the other room at 25°C, 160% for 12 hours, then 10"C.
One cycle was maintained at 180% condition for 8 hours, and 10 cycles were continued.

Thereafter, the maximum gap between the center and the line connecting both ends of the side where the handle of the flush door was provided was measured as the "curvature".

- Test specimen A Franche door (hereinafter referred to as the test specimen of the example) was created by the method described above. As a comparative example.

A flush door (test specimen of a comparative example) was prepared by bonding the crosspiece and finishing material with a vinyl acetate adhesive.

Five test specimens were prepared for each of these Examples and Comparative Examples.

・Judgment criteria "Warpage" is a maximum of 5, which is a range that does not hinder the opening and closing of the door.
．． A flush door with a diameter of 5 mm or less, and an average value of 5 test specimens of 4 mm or less, is accepted.

-Test results The five specimens mentioned above were tested using the test method described above, and their "warpage" was measured.

The results are as follows.

From this result, it can be determined that the flush door of the example in which the wooden finishing material was adhered to both the front and back sides of the wooden crosspiece with an elastic adhesive passed the test, and there is no problem in opening and closing the door.

(Effects of the Invention) As is clear from the above explanation, in the present invention, since the wooden finishing material and the wooden crosspiece are bonded together with an elastic adhesive, "warping" occurs to the extent that it becomes difficult to open and close the door. This is extremely convenient.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing the structure of the core material with a part of the surface of the flush door of the present invention removed, and FIG. 2 is an explanatory view showing the adhesive portion between the crosspiece and the finishing material. 1-・-1111・-Horizontal bar 2-・-・-・-Hinge side vertical bar 3-・-11111 Upper horizontal bar 4-・-11-- --- Lower horizontal bar 5 ---... Middle bar 6 groove 7 --- Wood finishing material 8 ---
1---Elastic epoxy adhesive (elastic adhesive)

Claims (1)

[Claims] (1) A flush door in which a wooden finishing material is applied to both the front and back sides of a wooden crosspiece, characterized in that the wooden crosspiece and the wooden finishing material are bonded together with an elastic adhesive. (2) The elastic adhesive has a maximum elongation rate at 20°C of 50 to 270%, a tensile strength at 20°C of 20 kg/cm^2 or more, and the thickness of the elastic adhesive layer 2. The flush door according to claim 1, wherein the door is bonded so that the distance is in the range of 0.3 to 2 mm.