JPS5851116B2 - Method of manufacturing sills or lintels - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for manufacturing sills or lintels that support shoji screens, sliding doors, etc. so that they can be opened and closed in Japanese-style architecture, and provides inexpensive sills or lintels by making effective use of wood. be.

Conventionally, this type of sill or lintel is made of a rectangular lumber A of an appropriate length with a rectangular cross section having a predetermined thickness a and width as shown in FIG. ) B is formed by providing two grooves C2C parallel to each other.
When installing 9C, the portion removed from the top surface B is wasted, resulting in a so-called poor yield, and there are restrictions on the materials used, such as the need for a square lumber with a thickness of at least the thickness of method 3 above, which results in high costs. was expensive.

The present invention has been developed in view of the above-mentioned circumstances, and the sill or lintel is formed by combining the bottom member, the left and right side members, and the intermediate member, thereby simplifying the manufacturing process. As a process, it is possible to use plate-shaped wood with a relatively thin thickness, and the yield is improved by eliminating waste when providing grooves, thereby realizing an inexpensive sill or lintel.

The method for manufacturing a sill or lintel according to the present invention will be explained below with reference to the embodiment shown in the drawings. In FIG. By cutting both sides of 1 symmetrically with cutting surfaces 2, 2 that make 45 degrees to the surface 1' of the square timber,
The cross section has a double base angle α.

The bottom member 3 has an isosceles trapezoid shape with α' of 45' (7), and a cross section with one base angle β of 45° and the other base angle β' of 90' (
7) Form two trapezoidal side members 4, 4.

Next, as shown in FIG. 3, a circumferential side member 4,
Inclined surface 4at 4a also produced by cutting in 4
45' (7) are joined with the base angles α, β and α, β in the same direction to form a rectangular cross-sectional shape.

In that case, as a joining means, in addition to using adhesive,
As shown in the figure, a plurality of small rods 6 may be buried across both members to be joined at appropriate intervals in the longitudinal direction, or this method may be used in combination with an adhesive.

Therefore, as shown in FIG. 4, an intermediate member 5 is provided in parallel with the center member of the circumferential side member which extends over the surface 3b of the bottom member 3 from which the side members 4, 4 project. , which has the same thickness a' and width b' as the conventional example shown in FIG. 1, and has two parallel female grooves c' on one side.
The sill or lintel formed by c' is completed.

Here, as a means for protruding the intermediate member, there is a method of simply bonding the intermediate member 5 onto the surface 3b of the bottom member with an adhesive as shown in FIG. side 3
A method of forming a groove 3c in the bottom member 3b and fitting the lower end 5a of the intermediate member 5 into the groove, or as shown in FIG. In addition to the method shown in the figure, it is also possible to use a method of inserting small pieces of paper in a Shinto ritual, or to use these in combination with adhesive.

Further, a step of joining the bottom member 3 and the side members 4°4,
Of course, the order of the step of protruding the intermediate member 5 may be changed.

As described above, according to the method for manufacturing a sill or lintel according to the present invention, the steps of forming a bottom member and two side members with a predetermined cross-sectional shape by cutting a plate-shaped square material, a step of joining these members, and an intermediate step are performed. Although it is a relatively simple method that involves the protruding process of parts, it eliminates the waste that would occur when using a single square timber in the past, improving yields and making effective use of timber. This has the advantage that it is possible to use plate-shaped wood with a relatively thin thickness, and this has the effect of realizing an inexpensive threshold or lintel.

[Brief explanation of drawings]

Figure 1 is a sectional view of a conventional threshold or lintel, Figure 2.3
．． Figure 4 is a cross-sectional view of a product that is buttoned in each step of the method for manufacturing a sill or lintel of the present invention, and Figures 5, 6, and 7 are cross-sectional views of essential parts showing other embodiments of the means for joining each member. DESCRIPTION OF SYMBOLS 1... Plate-shaped square material, 2... Cut surface, 3... Bottom member, 4... Side member, 3a, 4a... Inclined surface, 5...
・Intermediate member.

Claims (1)

[Claims] 1. An isosceles trapezoid with a base angle of 45 in cross section is obtained by cutting a plate-shaped square timber of an appropriate length with an elongated rectangular cross section on both sides and cutting it symmetrically with a cutting plane that makes a 45° angle to the surface of the square timber. A step of forming a bottom member having a trapezoidal shape and two side members having a trapezoidal cross section with one base angle of 450' and the other base angle of 90'(7); A step of joining the sloped surfaces produced by cutting the side members on each side member in the same direction as the 45' (7) base angles, and attaching the button to the bottom member on the side surface from which the side member protrudes. A method for manufacturing a sill or lintel, comprising the step of protruding an intermediate member parallel to the circumferential side members at an intermediate position thereof.