JP2815044B2 - Method of manufacturing bent long material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a bent and long material made of wood and bent in a three-dimensional direction.

[0002]

2. Description of the Related Art A handrail of a stair that rises and descends in a curved direction is formed in a three-dimensionally bent shape along the edge of the stair as shown by a symbol Y in FIG. As a handrail Y for this type of stairs, a wooden handrail is preferred in order to give a sense of quality.

[0003] By the way, it is impossible to bend (break) wood if it is used as one continuous square pillar-shaped raw material, but if it is made into a thin plate (having elasticity in the plate thickness direction), It can be bent relatively easily by mechanical force. Note that even thin wood cannot be bent in the board width direction.

[0004] Conventionally, when a handrail Y bent in a three-dimensional direction as shown in FIG. 9 (hereinafter, this handrail is also referred to as a bent long material) Y is formed of wood, the bent long material Y is used. The predetermined small length range (for example, FIG. 9)
Of divided codes Y ₁ to Y _5), divides their timbers to each thin plate, their lamellar splitting plate by bending in a predetermined shape to correspond to the application position on each bending long material Y, processed each connection end faces of their short and small bending member Y ₁ to Y ₅ a ready to interconnected respectively, subjoin an adhesive agent or the like as shown by the respective short and small bending member Y ₁ to Y ₅ sequentially codes a, that Through each step, the bent long material Y bent in the three-dimensional direction was formed.

[0005]

However, in the above-described conventional method for manufacturing a long bent material, the above-described steps (1) to (3) are performed to manufacture a bent long material bent in a three-dimensional direction. There were the following problems.

(1) The bent and long material Y as the final form is formed by continuously connecting a plurality of short and small bent materials Y _{1 to} Y ₅ in a length direction by superposing a plurality of thin plate-like divided plates. since it has left a joint mark indicating a connecting portion of the respective short and small bending member Y ₁ to Y ₅ by reference numeral a,該継skill marks a, a · · is impairing the appearance. (2) is troublesome for processing into a shape that may be interconnected to connection end face of the short and small bending member Y ₁ to Y _5. (3) Each of the short and small bent members Y _{1 to} Y ₅ is simply bent in the two-dimensional direction. Therefore, when the short and small bent members are connected in the three-dimensional direction, the connecting portions (symbol A) are connected to each other. Corners tend to be formed, resulting in an unnatural shape (poor appearance). (4) There is a possibility that the strength of the connection portion (symbol A) of each of the short and small bending members Y _{1 to} Y ₅ is weakened, and the connection portion is separated over time. (5) bent elongate member Y is, since the formed continuously each short and small bending member Y ₁ to Y ₅ in the longitudinal direction, shape grain is seamed being discontinued is exposed as it is, appearance Gets worse. In addition, if the surface of the bent long material Y is painted dark, the joint shape can be relaxed, but in this case, the texture (luxury feeling) of the wood is impaired.

[0007] In view of the above-mentioned conventional problems, the present invention provides an appearance in which one piece of wood is bent as it is in a three-dimensional direction as it is, and the long piece of wood is bent in a state where the wood is continuous in the length direction. It is an object of the present invention to propose a method for manufacturing a bent long material capable of manufacturing a bent long material.

[0008]

SUMMARY OF THE INVENTION The method for producing a long bent material according to the present invention is for producing a bent long material bent in a three-dimensional direction, and performs the following steps.

That is, the method for producing a bent long material of the present invention is as follows.
A raw material dividing step in which a raw material made of long rectangular timber of wooden shape is divided by a predetermined small thickness, and each divided plate is returned to its original state with an adhesive interposed between the divided divided plates. A split plate polymerization step of polymerizing into a quadrangular prism shape, a columnar body bending step of bending the polymerized columnar body obtained in the splitter plate polymerization step into a predetermined shape in the polymerization direction of each split plate, and the columnar body bending step The angle between the obtained bent columnar body and the dividing direction of the dividing plate is 9 degrees.
A bent columnar body dividing step of forming a plurality of bent plates bent in the plane direction by dividing by a predetermined small thickness from a direction displaced by 0 °, and an adhesive was interposed between the divided bent plates. A bent plate polymerization step of polymerizing each bent plate in the original bent columnar shape in the state, and bending the re-polymerized bent columnar body into a predetermined shape in the stacking direction of each bent plate in a three-dimensional direction. And a step of bending a bent columnar body to form a bent long material.

In the raw material dividing step, the raw material used is quadrangular prism-shaped wood having the same thickness as the finally formed bent and long material and having a length equal to or longer than that. Also, in this raw material dividing step, when a straight-grain pattern appears on the plane portion of the bent long material to be manufactured, the raw material is divided in parallel with the straight-grain surface, and In the case where a grain pattern appears in the part, the raw material is divided in parallel with the grain surface. Further, in this raw material dividing step, if the raw material is sequentially cut (sliced) by a predetermined small thickness (for example, 2 to 5 mm thickness) by a slicer blade, no chips are generated from the raw material. It should be noted that the division of the raw material by a predetermined small thickness in this manner is to enable bending in a subsequent process.

In the dividing plate superimposing step, an adhesive is interposed between the divided plates divided in the raw material dividing step to polymerize the original square prism. As the adhesive used in this step, an adhesive capable of firmly bonding both split plates with a small amount is preferable. Further, it is preferable that no gap is formed between the two divided plates by the adhesive in the joined state. In the raw material dividing step, when the raw material was divided in parallel with the straight-grain surface, short wood grain appeared on the side surface in the width direction of each divided plate. It is preferable that the short woods of the split plates are continuous with each other so as to be sequentially polymerized.

In the column bending step, a polymerized column formed by polymerizing the respective divided plates via an adhesive is bent into an appropriate shape using a bending machine. It is preferable to do it before it. In addition, since the superposed columnar body to be bent is formed by superimposing each of the divided plates divided by a predetermined small thickness, each of the divided plates becomes bendable by the elasticity of the divided plate, and is superposed on the columnar body. Even if it is, it can be relatively easily bent. After the columnar body bending step, the bending posture is maintained by the fixing jig until the adhesive between the divided plates is solidified.

In the bent columnar body dividing step, the bent columnar body is provided with a predetermined small thickness (for example, 2 to 2) from a direction displaced by an angle of 90 ° from the dividing direction of the divided plate performed in the raw material dividing step.
(5 mm thick) to form a plurality of bent plates. Also in this case, if the bent columnar body is divided by a slicer, no chips are generated at the time of division. Each bent plate formed from a single bent columnar body has the same shape as each other.

In the bending plate polymerization step, an adhesive is interposed between the bending plates to polymerize to the original bent columnar shape. The adhesive used in this case may be the adhesive used in the split plate polymerization step.

In the bent columnar body bending step, the bent columnar body re-polymerized in the bent plate polymerization step is bent into a predetermined shape in the stacking direction of each bent plate. It can be bent back. Also in this case, it is preferable to perform the bending operation before the adhesive interposed between the bending plates is solidified. And
The bent columnar body is kept in the bent posture until the adhesive between the bent plates is solidified.

The bent and long material manufactured in this manner is
It is bent in a three-dimensional direction, and its surface is finished by polishing or polishing, and is used, for example, as a handrail of a bent staircase. Further, this bent and long material is formed by bonding a large number of narrow bar-shaped wood pieces each having a square shape having a width of about 2 to 5 mm on one side thereof with an adhesive, for example. Are seamlessly continuous over the entire length of the bent plate. In addition, although there is a linear joint between each of the thin bar-shaped lumbers, the linear joint is almost indistinguishable to the naked eye.
In addition to this handrail, the bent long material can be used in any place where a material bent in a three-dimensional direction is required.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described with reference to FIGS. 1 to 8. In the method of manufacturing a bent and long material according to the embodiment of the present invention, for example, a hand for a bent stair as shown in FIG. This is for manufacturing the long bent material 7 (FIG. 8) used as the sliding Y. By the way, when the bent long material 7 is used as a handrail, its entire length is, for example, 5 m or more, but in the embodiment shown in FIGS. The overall length is described in short.

In the method of manufacturing a bent long material according to the embodiment shown in FIGS. 1 to 8, a bent long material 7 which bends in a three-dimensional direction is manufactured by performing the following steps. That is, as shown in FIG. 1, a raw material 1 having a square pillar shape is divided by a slicer 10 by a predetermined small thickness to form a divided plate 2 as shown in FIG. , 2,... Are superimposed on the superposed columnar body 3 shown in FIG. 3 with the adhesive 8 interposed therebetween, and the superposed columnar body 3 is formed into a predetermined shape. And a bending column dividing step of dividing the bent column 4 into a bent plate 5 having a predetermined small thickness as shown in FIG. As shown in FIG. 6, the bent plates 5, 5,... Are superimposed into the original bent columnar shape shown in FIG. 7 with the adhesive 9 interposed between the bent plates 5, 5,. FIG. 8 shows a bending plate polymerization step and bending of the re-polymerized bent columnar body 6 into a predetermined shape in the direction of polymerization of the bending plates 5, 5,. Sequentially performing the bending columnar body bent to form a bent elongated member 7 which is bent in three-dimensional directions.

In the raw material dividing step shown in FIG. 1, as the raw material 1 to be used, wood having a grain 13 is preferable. The raw material 1 is a quadrangular prism having the same thickness as the finally formed bent long material 7 and has a length equal to or greater than the bent long material 7 (for example, when used for a handrail for a bent staircase). Is preferably 5 m or more). In addition, the raw material 1 shown in FIG. 1 employs a material in which the center of the grain pattern passes through the center of the grain surface 12 in the width direction.

In the raw material dividing step shown in FIG.
The raw material 1 is sliced by a slicer 10 in order of a predetermined small thickness (for example, about 2 to 5 mm) and divided into a large number of divided plates 2. In this case, as shown in FIG. 1, the slicer 10 has a pusher 15 and a blade 16, and the raw material 1 is pressed and moved by the pusher 15 so that the lower surface of the raw material 1 is reduced to a predetermined thickness by the blade 16. Just strip it off.
In this embodiment, as shown in FIG. 8, the grain pattern 12 is made to appear on the side surface of the bent long material 7 to be manufactured. Face 11
However, when a straight-grained pattern appears on the side surface of the bent long material 7 to be manufactured, the raw material 1 is scraped in parallel with the plate surface 12. In addition, in the raw material dividing step, since the dividing plate 2 is cut off by the blade 16 of the slicer 10, no chips are generated at the time of the division, and the division is performed by sawing. No resections occur.

Next, in the divided plate superimposing step, as shown in FIG. 2, an adhesive 8 is interposed between the divided plates 2, 2,... Divided in the raw material dividing step of FIG. Each of the divided plates 2, 2...
To be combined. As the adhesive 8 used in this step, it is preferable to use an adhesive capable of firmly bonding the two split plates 2 and 2 with a small amount. For example, as the adhesive 8, one having a property of reacting with water in wood and solidifying (for example, a product name of Oshika Kogyo Co., Ltd .; referred to as Oshicadyne) is suitable. Further, it is preferable that no gap is formed between the two divided plates 2 and 2 by the adhesive 8 in the joined state. further,
When the divided plates 2, 2,... Overlap, each of the divided plates 2, 2,.
The superimposition is performed such that the short woodgrain 13a, 13a appearing on the side surface in the width direction of (1) is continuous with each other. And raw material 1
When all the divided plates 2, 2,.
Can be constituted. In the overlapped columnar body 3, each grain 13, 13,... Of the board grain surface 12 continues in the same shape as the original raw material 1. In addition, when using a saw blade to cut the divided plate 2 from the raw material 1, a cut off portion is generated due to generation of sawdust, and when the divided plates are superimposed, There is a drawback that a step is formed between the short woods of the split plate and the wood becomes discontinuous (the appearance is deteriorated). However, in the case where the raw material 1 is divided by the slicer 10 as in this embodiment, the wood is not The problem of discontinuity can be solved.

In the columnar body bending step shown in FIG. 4, the overlapping columnar body 3 of FIG. 3 is bent into an appropriate shape using a bending machine. It is preferable to carry out before the adhesive 8 is solidified. or,
The superposed pillars 3 to be bent are divided into small-diameter divided plates 2 and 2.
·················································································································································································
Can be bent. That is, each divided plate 2, 2,.
Is formed in a predetermined small thickness (for example, about 2 to 5 mm), each has elasticity in the thickness direction, and a bending pressure in the thickness direction of the divided plate is applied to the entire overlapped columnar body 3. In this case, the bending pressure is absorbed by each of the divided plates 2, and troubles such as breakage do not occur. In the columnar body bending step, the bent columnar body 4 is maintained in a predetermined shape by a fixing jig until the adhesive 8 is solidified. In this embodiment, in the column bending step, a bent portion indicated by reference numeral 18 is provided at an appropriate position near the top end of the superposed columnar body 3 and the superposed columnar body 3
The two bent portions indicated by reference numeral 19 are bent at an angle of about 45 ° at an appropriate position near the base end. Then, in the final form (bend long material 7) shown in FIG. 8, the distal side from the bent portion 18 near the distal end becomes a rising portion, and the proximal side from the bent portion 19 near the proximal end in a bent columnar body bending step described later. It is bent in a hairpin curve shape.

By the way, each bent portion 18 of the bent columnar body 4,
In 19, the splitting plate 2 located on the concave side and the splitting plate 2 positioned on the convex side have different expansion and contraction rates (the concave splitting plate is compressed and the convex splitting plate is expanded). However, there is almost no difference in expansion and contraction between the joining surfaces of the adjacent divided plates 2 and 2. Therefore, each short wood grain 13a, 13a appearing on the side face in the width direction of both split plates 2, 2 is
Even at the bent portion, the shortest grain 1 of the adjacent split plates 2 and 2 is obtained although the material expansion and contraction ratio is considerably different between the most concave split plate 2 and the most convex split plate 2.
Since the 3a and 13a are continuous with each other, the grain pattern of the entire bent columnar body 4 is slightly deformed, but each grain line 1
The continuous state of 3, 13,... Does not collapse. In addition, the grain of the wood pattern remains oriented along the bending direction of the bent columnar body 4.

In the bent columnar body dividing step shown in FIG. 5, the bent columnar body 4 shown in FIG. 4 is moved from the direction displaced by 90 ° from the dividing direction of the divided plate performed in the raw material dividing step shown in FIG. The bending plate 5 having the same shape is sequentially formed by dividing the plate into predetermined small thicknesses (for example, 2 to 5 mm). Also in this case, if the bent columnar body 4 is divided by the slicer 10, no chips are generated at the time of division.

In the bending plate superimposing step shown in FIG. 6, each of the bent plates 5, 5,... Is attached with the adhesive 9 interposed between the divided bent plates 5, 5,. Are polymerized to the original bent columnar shape shown in FIG. The adhesive 9 used in this case is the same type as the adhesive 8 used in the split plate polymerization step.

In the bending step of the bent columnar body, the bent columnar body 6 shown in FIG. 7 is bent into a predetermined shape toward the overlapping direction of the bending plates 5, 5,... By a bending machine. 6 can be bent in a three-dimensional direction. It is preferable that this bending operation be performed before the adhesive 9 between the bent plates is solidified, similarly to the above-described columnar body bending step. Also, in the bent columnar body bending step, each of the bending plates 5, 5,... Is bent in the plate thickness direction.
The whole can be bent without difficulty. In this embodiment, a bent long material 7 used for handrails of a bent stair as shown in FIG. 9 is manufactured. As shown in FIG. A horizontal bent portion 23 in the shape of a hairpin curve on the base end side, a gentle bent portion 22 upwardly and gently curved in a considerably long range in the middle portion, and a rising portion 21 rising upward at a position close to the distal end portion. Each is formed. In the bent columnar body bending step, the bent long material 7 is maintained in a predetermined shape by a fixing jig until the adhesive 9 is solidified. When the bent columnar body 6 is bent in the overlapping direction of the bent plates 5, 5, irregular portions 7 a and 7 b are formed at both ends of the bent elongated material 7, but the irregular portions 7 a and 7 b are cut off later. And align each end face neatly.

The bent long material 7 manufactured in this way
Is used as a handrail of a curved staircase as shown in FIG. 9 after finishing the surface by polishing or polishing. In this case, the bent long material 7 is placed in the state where the horizontal bent portion 23 on the base end side is horizontal and the gentle bent portion 2 in the middle portion.
2 is set along the edge of the stairs, and the tip of the rising portion 21 is connected to the handrail on the second floor for installation. The bent long material 7 is formed by bonding a plurality of narrow bar-shaped wood pieces each having a square shape having a width of about 2 to 5 mm on one side thereof with an adhesive, for example. Are continuous without a seam over the entire length of the bent long material 7. In addition, although there is a linear joint between each of the thin bar-shaped lumbers, the linear joint is almost indistinguishable to the naked eye. In addition, the grain of wood is exposed on the side surface of the bent long material 7 as it is.

[0028]

According to the present invention, a method for manufacturing a bent long material is as follows.
A raw material dividing step of dividing the book raw material 1 by small thickness, a split plate superposing step of superimposing the original raw material 1 into the original quadrangular prism shape with the adhesive 8 interposed between the split plates 2, and a superposed columnar body 3 Column bending step of bending the bent columnar body in the stacking direction of the divided plate, a bent columnar body dividing step of dividing the bent columnar body 4 by a small thickness from a direction displaced by an angle of 90 ° with respect to the dividing direction of the divided plate 2, and the division thereof. Bending plate polymerization step of polymerizing each of the bent plates 5 in a state where the adhesive 9 is interposed between the bent plates 5, and bending of the re-polymerized bent columnar body 6 in the polymerization direction of each of the bent plates 5. By performing the column-shaped body bending step, the bent long material 7 bent in the three-dimensional direction is manufactured.

Therefore, according to the present invention, one raw material 1
Accordingly, it is possible to manufacture the bent long material 7 that is bent in the three-dimensional direction in a state where the continuous material is continuous without a seam over the entire length. In addition, in the bent long material 7 manufactured by the present invention, the original shape of the raw material 1 is maintained (for example, the grain 13 is maintained in the original shape), so that there is a sense of quality, and there is no seam over the entire length. , It is excellent in strength. Further, since the bent portion of the bent long member 7 can be formed into a smooth curved surface, there is an effect that the bent long member 7 having a good appearance can be provided.

[Brief description of the drawings]

FIG. 1 is a raw material division process diagram of a method for manufacturing a bent long material according to an embodiment of the present application.

FIG. 2 is a diagram illustrating a split plate stacking process of the method for manufacturing a bent long material according to the embodiment of the present application.

FIG. 3 is a perspective view of a polymerized columnar body obtained in the split plate polymerizing step of FIG. 2;

FIG. 4 is a process diagram of bending a columnar body in the method for manufacturing a bent long material according to the embodiment of the present application.

FIG. 5 is a process diagram of dividing a bent columnar body in the method of manufacturing a bent long material according to the embodiment of the present application.

FIG. 6 is a process diagram of a bent plate stacking process of the method for producing a bent long material according to the embodiment of the present application.

FIG. 7 is a process drawing of a bent columnar body in the method for manufacturing a bent long material according to the embodiment of the present application.

FIG. 8 is a perspective view of a bent long material manufactured by the manufacturing method according to the embodiment of the present application.

FIG. 9 is a perspective view showing a usage example when a bent long material is applied to a handrail.

[Explanation of symbols]

1 is a raw material, 2 is a split plate, 3 is a polymerized column, 4 is a bent column, 5 is a bent plate, 6 is a bent column, 7 is a bent long material,
Reference numerals 8 and 9 denote adhesives, 10 a slicer, and 13 a grain.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B27H 1/00 B27M 3/00 B27M 3/12

Claims (1)

(57) [Claims] 1. A raw material (1) made of a long rectangular timber.
Is divided by a predetermined small thickness, and an adhesive (8) is provided between the divided plates (2, 2,...).
Are divided into the original quadrangular prisms with the interposed part, and the polymerized columnar body (3) re-polymerized is divided into the divided plates (2, 2,...).
・ ・) It is bent into a predetermined shape toward the overlapping direction, and the bent columnar body (4) is divided by a predetermined small thickness from the direction displaced by 90 ° with respect to the division direction of the division plate (2). To form a plurality of bent plates (5, 5...) Bent in the plane direction, and with the adhesive (9) interposed between the bent plates (5, 5,...). The plates (5, 5,...) Are polymerized into the original bent columnar body shape, and the re-polymerized bent columnar body (6) is placed in each bent plate (5, 5,...).
(B) forming a long material (7) bent in a three-dimensional direction by bending into a predetermined shape in the polymerization direction of (1).