KR101324069B1 - Jointing Method of Cedar Square Timber - Google Patents

Abstract

The present invention relates to a method of joining the cedar lumber, more specifically, by using the properties of the cedar belonging to the soft wood to equal the surface shape of each cut surface to eliminate the gap between the cut surface and match the cut surface to strengthen the adhesive strength cedar lumber The present invention relates to a method of joining cedar beams that have increased joint strength by increasing joint strength between them.
To this end, a) cutting the shelled cedar wood to prepare a first and second shell materials of a certain size; b) the step of closely contacting one surface of the first shell material and one surface of the second shell material; c) the b Sawing along the surface in close contact with the first angle member and the second angle member through the step; the width direction part of the saw blade to scrape one surface of the first angle material, and at the same time the rest of the width direction of the saw blade is the second Cutting a surface of the shell material to form a first cut surface and a second cut surface to which the first shell material and the second shell material are engaged; And d) applying an adhesive to at least one of the first cut surface and the second cut surface.

Description

Joining Method of Cedar Square Timber}

The present invention relates to a method of joining the cedar lumber, more specifically, according to the soft nature of the cedar belonging to the soft wood to make the surface shape of the cedar horn cut surface to be in perfect contact between the cut surface to increase the bonding strength between the cedar lumber. It is related with the joining method of cedar lumber.

In general, cedar is light, straight, and soft, and has a high content of phytoncide compared to general wood, which is attracting attention as well-being wood.

Phytoncide is a substance released or secreted by plants to resist pathogens. It inhibits the growth or inhibits the growth of spiders, pests, moths, mosquitoes, house dust, mites, etc. Has the property of helping to recover from fatigue.

Cedar is used in various households such as desks, chests of drawers, and beds, which are used in homes, and are often used as interior materials for bathrooms.

Furniture or interior materials made of cedar use a panel in which several pieces of lumber are cut in a row to a certain size. Here, the lumber refers to lumber that is divided into a long box of solid wood.

However, cedar contains a large amount of moisture, which makes it difficult to dry, and after drying, it is easy to deform and repeat moisture absorption and dehumidification, and also has a weakness in weakening the material.

As a general method of joining the cedar panels to make such a cedar panel, the joints are formed in the form of teeth on both ends of the lumber, and the finger joint method and the long lumber are arranged by joining the lumber and the ridges in the shape of two fingers. There is a solid joint method.

However, the finger joint method is formed with teeth at both ends, so the wood is soft after processing into furniture, and cedar, which has a high moisture content, repeatedly contracts and expands (hygroscopic and dehumidifying), and the furniture is easily made with warp or space. There is a problem that the back is deformed.

In addition, the solid joint method simply joins a plurality of long pieces of wood, and the cutting surface is different according to the drying environment and the cutting environment. When joining these materials, the gap is formed as shown in the enlarged portion of the dotted circle as shown in FIG. According to the arranged environment, the surface of the joint surface increases in contact with moisture, and the contraction and expansion are repeated, but the joint surface is deformed and spaced apart.

The present invention has been devised in view of the above circumstances, according to the moisture content of the cedar wood, according to the soft properties of the cedar lumber each of the cut surface of the same shape to eliminate the gap between the cut surface to match the cut surface to strengthen the adhesive strength An object of the present invention is to provide a joining method of cedar lumber that increases the bonding strength between them.

In order to achieve the above object, the present invention comprises the steps of: a) cutting the shelled cedar wood to prepare a first shell and a second shell of a certain size; b) contacting one surface of the first shell material and one surface of the second shell material; c) sawing the first corner member and the second corner member in close contact with each other in a state in which the first corner member and the second corner member are in close contact with each other in the width direction of the saw blade to cut off one surface of the first corner member, and at the same time, rest the width direction of the saw blade. Scraping one surface of the second shell material to form a first cut surface and a second cut surface to which the first shell material and the second shell material are engaged; And d) bonding the first shell member and the second shell member by applying an adhesive to at least one of the first cut surface and the second cut surface.

In addition, in step b), the contact surface of the first shell member and the contact surface of the second shell member are coupled to a vise in which a detachable wood plate or rubber plate is coupled to the main body and the movable part face plate, respectively, so that one surface and the second shell member of the first shell member are respectively joined. One side of is in close contact.

In the step d), the first cutting surface is pressurized to be spaced apart at a predetermined interval to form a first adhesive groove to which an adhesive is applied, and pressed to be spaced apart at a predetermined interval to deviate from the first adhesive groove to the second cutting surface. 2 Form an adhesive groove.

In the joining method of cedar lumber according to the present invention, a part of the width direction of the saw blade is cut off one side of the first lumber by the same saw blade in the same environment, the remaining width direction part of the saw blade at the same time to cut off one surface of the second lumber at the same time By forming a cut surface in which one surface and one surface of the second shell member coincide with each other, there is an effect that the cut surfaces are completely in contact with each other during bonding.

This enhances the adhesion between the first and second shells, which enhances the bonding strength between the shells.There is no gap between the cuts, so that the joints are blocked from external environments such as humidity, temperature, and air. There is an effect of preventing the bonding surface from being deformed.

1 is a plan view showing a state of bonding the cedar lumber according to the conventional solid joint method.
Figure 2 is a flow chart illustrating a bonding method of cedar hornwood according to the present invention.
Figure 3 is a state diagram showing a state of cutting the contact surface of the cedar lumber according to the present invention.
Figure 4 is a perspective view of the vise according to the present invention.
5 is a plan view showing a state of bonding the cedar hornwood according to the present invention.
Figure 6 is a state diagram showing a state of forming an adhesive groove according to the present invention.
7 is a plan view showing a fastening hole according to the present invention.
8 is a perspective view showing a cedar panel according to the present invention.

Hereinafter, a preferred embodiment of the bonding method of cedar lumber according to the present invention will be described with reference to the drawings.

The present invention relates to a method of joining cedar planks for joining a plurality of cornerstones cut to a certain size of solid wood or furniture made of cedars into a cedar panel. By using the characteristics of the cedar belonging to each of the cutting surface to be the same by removing the gap between the cutting surface to strengthen the adhesion between the cutting surface and increase the bonding strength to increase the bonding strength of the cedar bark.

Preferably, as shown in FIG. 2, cutting the cedar peeled from the outer skin to prepare a first shell material and a second shell material of a predetermined size (S10); Contacting one surface of the first shell material and one surface of the second shell material (S20); In step b), the first angler and the second angler are in close contact with each other along the contact surface, so that a part of the width of the saw blade cuts one side of the first angle material, and at the same time, the width direction of the saw blade cuts one side of the second angle material. Forming a first cutting surface and a second cutting surface to which the first shell material and the second shell material are engaged (S30); And applying an adhesive to at least one of the first cut surface and the second cut surface to bond the first shell material and the second shell material (S50).

In detail, first of all, the cedar peeled from the outer skin is cut into rectangular cuboids of a predetermined size, and the first and second shells 10 and 20 are prepared by drying the shells.

Here, the drying method of the first shell material 10 and the second shell material 20 includes a natural drying method, a hot air drying method, a dehumidification drying method, a vacuum drying method.

Looking at the characteristics of each drying method, the natural drying method is a method of drying the materials by stacking them in the open air and exposed to atmospheric conditions, which does not require special drying equipment and techniques, but the drying time is long and difficult to dry below the dry moisture content. There are many disadvantages that are affected by location.

Hot-drying method is a method of drying each material by drying schedule prepared by species and thickness after depositing each material in the drying room where temperature and humidity are controlled. It can raise necessary temperature / humidity in a short time and increase the temperature / humidity in the drying room. There is a need for performance that can be uniformly maintained for a long time. Therefore, basic facilities such as drying chamber, heating and humidification device, air circulation device, ventilation device and automatic control of temperature / humidity are required.

The dehumidification drying method is a drying method of heating each material using heat generated in a heat exchanger and condensing and removing moisture evaporated from each material. Unlike hot air drying, energy can be used more efficiently by condensing and re-using moist air. Due to the nature of the refrigerant used in the heat exchanger, it is impossible to raise the temperature of the drying room above 50 ° C. Therefore, the drying speed is slow and it cannot be dried to a low water content.

Vacuum drying method is a method of drying each material by using the principle of lowering the boiling point of water in the fractional vacuum state, while having the advantages of high temperature drying, drying defects generated at high temperature drying are minimized. In vacuum drying, the moisture of wood moves in the fiber direction, so the drying speed is 5 ~ 10 times faster than that of hot drying, and the incidence of drying defects is low, so it is effective for drying hard and hard materials, especially hot drying of thick structural materials. The effect as a preliminary drying for the

Accordingly, the cedar lumber having a high moisture content and soft texture is preferably dried by a vacuum drying method in which moisture moves in the fiber direction during drying, and the drying defect is low.

Here, the dried cedar lumber shrinks as it is dehumidified below the fiber saturation point, where cedar is cut in the shape of the lumber, ie, at the time of cutting, depending on the humidity, temperature, direction of the saw blade, and the force applied to the saw blade. The surface shape and shrinkage rate of the different to have a different cutting surface and these horns form a gap as shown in the enlarged view of the dotted circle portion of FIG.

 The present invention is characterized by eliminating such gaps and increasing the bonding force between the respective cedar lumber sticking to match the cutting surface.

To this end, first the one surface 11 of the first shell material 10 and the one surface 21 of the second shell material 20 is dried, and then the first shell material 10 and the second shell material 20 is in close contact with the close means. (S20)

Here, the contact means preferably uses a vise 40, the vise 40 generally refers to a mechanism for fixing the workpiece, the body is fixed to the work table, the movable portion for linearly moving the body and the first angle member ( 10) and the second shell 20 is composed of three parts of the screw rod to move the movable part to be compressed to tighten between the main body.

In addition, the main face plate 41 and the movable part face plate 42 are coupled to the auxiliary face plate 43 in contact with the first shell member 10 and the second shell member 20, respectively.

This prevents part of the contact surface from being deformed by the face plates 41 and 42.

 For this purpose, the auxiliary face plate 43 is preferably a wood plate or a rubber plate, and the size of the auxiliary face plate 43 is changed according to the area of the contact surface 12 of the first shell material and the contact surface 22 of the second shell material. It is preferable.

Next, the first shell member 10 and the second shell member 20 fixed to the vise 40 have one surface 11 and one surface of the second shell member 20 of the first shell member 10 in order to eliminate the gap between the contact surfaces. Saw the close contact surface 21 is in close contact with the first shell member 10 and the second shell member 20 to form a cutting surface corresponding to each other (S30).

At this time, a part of the width direction of the saw blade 30 cuts one surface 11 of the first shell material and at the same time the remaining width of the saw blade 30 cuts one surface 21 of the second shell material. Can be formed.

That is, the one surface 11 of the first shell member 10 and the one surface 21 of the second shell member 20 simultaneously cut by the same saw blade 30 are in the same environment, that is, by the humidity and temperature of the workplace at the time of cutting and the worker. The cutting surface 13 and the cutting surface 23 of the second shell member 20 of the first shell member 10 having the same direction as the direction of the saw blade 30, the force applied to the saw blade 30, and the same cross-sectional surface shape and shrinkage rate. ).

Next, adhesive grooves 51 and 52 for accommodating an adhesive are formed in the cut surface 13 of the first shell material 10 and the cut surface 23 of the second shell material 20 (S40).

The adhesive grooves 51 and 52 have adhesives applied to the cut surface 13 of the first shell material 10 and the cut surface 23 of the second shell material 20. It is prevented from appearing on the outer surface of the device.

The adhesive grooves 51 and 52 are not formed by digging grooves separately according to the characteristics of the soft cedar material, and as shown in FIG. 6, the adhesive grooves 51 and 52 are spaced apart at regular intervals along the cutting surface 13 of the first shell member 10. The first adhesive groove 51 is formed by hitting the cut surface 13 of the first shell material with a hitting means 50 such as a hammer to pit.

In addition, the second shell member 20 with a hammering means 50 such as a hammer at a point spaced apart from the first adhesive groove 51 by a predetermined distance along the cut surface 13 of the second shell member 20 so as to widen the application range of the adhesive. The second adhesive groove 52 is formed by hitting the cut surface 23 of the ().

Thereafter, an adhesive is applied to the first adhesive groove 51 and the second adhesive groove 52 to bond the cut surface 13 of the first shell material 10 and the cut surface 23 of the second shell material 20 to each other. )

In addition, in order to strengthen the joint coupling force of the first shell material 10 and the second shell material 20, preferably nailing iron nails to the joint surface, first the first shell material 10 and the second shell material ( 20) Punch a fastening hole 60 for guiding the path of the nail into each.

That is, the fastening hole 60 is drilled diagonally from the outer surface of the second shell member to the cutting surface 23 of the second shell member and the center of the first shell member 10 at the center of the cutting surface 13 of the first shell member. Perforated horizontally inside.

The nails are driven into the fastening holes 60 to increase the bonding strength of the first shell material 10 and the second shell material 20.

At this time, the fastening hole 60 formed on the outer surface of the second shell material is blocked by using the remaining cedar pieces so that the appearance is beautiful.

According to the present invention, the cutting surface 13 of the first shell material and the cutting surface 23 of the second shell material having the cut surface have no gap as shown in FIG. Cedar panel 100 is configured to bond the cutting surface without a gap as shown in Figure 8, even if the hygroscopic and dehumidification is repeated depending on the humidity of the environment disposed therein can prevent deformation deformation of the joint site.

The above description is only a preferred embodiment of the present invention, and there may be various modifications. However, if these modifications are included in the technical idea of the present invention will be within the scope of the present invention, the scope of the present invention can be easily understood by those skilled in the art through the following claims.

10: first lumberjack 11: one side of the first lumberjack
12: contact surface of the second shell material 13: cut surface of the first shell material
20: the second lumber 21: one side of the second lumber
22: contact surface of the second shell material 23: cutting surface of the second shell material
30: saw blade 40: vise
41: face plate of the body 42: face plate of the movable portion
50: hitting means 51: the first adhesive groove
52: second bonding groove 60: fastening hole
100: cedar paneling

Claims (3)

a) cutting the shelled cedar and preparing first and second lumbers of a predetermined size;
b) contacting one surface of the first shell material and one surface of the second shell material;
c) sawing the first corner member and the second corner member in close contact with each other in a state in which the first corner member and the second corner member are in close contact with each other in the width direction of the saw blade to cut off one surface of the first corner member, and at the same time, rest the width direction of the saw blade. Scraping one surface of the second shell material to form a first cut surface and a second cut surface to which the first shell material and the second shell material are engaged; And
d) applying an adhesive to at least one of the first cutting surface and the second cutting surface to bond the first shell material and the second shell material,
In step b)
The contact surface of the first shell member and the contact surface of the second shell member are respectively coupled to a vise in which a detachable wood plate or rubber plate is coupled to the main body and the movable part face plate so that one surface of the first shell member and one surface of the second shell member are in close contact. ,
In step d)
Pressing the first cutting surface to be spaced apart from each other to form a first adhesive groove to which an adhesive is applied; forming a second adhesive groove to the second cutting surface by pressing to be spaced apart from the first adhesive groove at a predetermined interval;
In step d)
Drill the fastening holes for guiding the path of the nail in each of the first shell and the second shell, the fastening hole is bored in a diagonal direction from the outer surface of the second shell to the cutting surface of the first shell and the center of the cutting surface of the first shell The method of joining the cedar hornwood, characterized in that the boring is horizontally drilled into the interior of the first lumber to drive the nail into the fastening hole to join the first and second lumber.
delete delete

Images