JPH07251402A - Laminated timber to be bent and manufacture of bent laminated timber - Google Patents

Abstract

PURPOSE:To simply manufacture a laminated timber to be bent at low cost by a method wherein a paper material made of a corrugated cardboard base paper having a size almost the same as outlines of a plurality of thin plates consisting of timber is arranged in between these thin plates, these are stuck together by a paste, pressed, cooled, and adhered. CONSTITUTION:A laminated timber 2 to be bent is used for, for example, a side beam of a spiral staircase. When the laminated timer 2 is to be manufactured, a paper material 4 made of a corrugated cardboard base paper having a size almost the same as outlines of a plurality of thin plates 3 consisting of timber is arranged in between the thin plates in a working process 1. After these are stuck together by a paste 5, they are cooled, pressed, and adhered by a press 6, so that the laminated timber 2 is manufactured. In a fixing process 7, the laminated timber 2 is fixed to a bending mold 8 by a clamp 13, and hot blast is sprayed on the laminated timber 2 by a hot blast spraying machine 14 so as to bend the laminated timber 2. The laminated timber 2 is dried in a drying process and released from the bending mold 8 in a releasing process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending laminated material used for a side girder of a wooden spiral staircase or a curved staircase, and a method for manufacturing the bent laminated material.

[0002]

2. Description of the Related Art Conventionally, the side girders of the staircase are plywood, decorative materials,
It is composed of 5 members that use inner and outer materials, or the strip-shaped veneer is bent in a spiral shape along the cylindrical surface of the cylindrical body from the upper end to the lower end of the cylindrical body, and the veneer is temporarily held in this state. Then, an operation of stacking the next veneer on this veneer via an adhesive and compressing and adhering the veneer is repeated, and a plurality of veneers are assembled and adhered to form a spiral stair side plate.

[0003]

The side plate of the conventional staircase, which is composed of five members, has four joint portions, so that it is necessary to have a technique of size and an on-site matching process. However, there is a disadvantage in that it requires a lot of time, and that the cost is high. Further, the one in which a plurality of single plates are assembled and adhered to form the spiral side plate has a drawback in that it takes time and labor for processing and the cost becomes high.

In view of the above-mentioned conventional drawbacks, the present invention has been made.
It is an object of the present invention to provide a laminated material that can be manufactured at low cost and a method for manufacturing a laminated material that has been subjected to bending processing without using special equipment or a processing method.

The above and other objects and novel characteristics of the present invention will become more fully apparent when the following description is read in view of the accompanying drawings. However, the drawings are for explanation only and do not limit the scope of the present invention.

[0006]

In order to achieve the above object, the present invention provides at least two or more thin plates made of wood, and has substantially the same size as the outline of the thin plates interposed between the thin plates. A laminated material is formed by bending and bonding a cardboard base paper, a paper material formed of recycled paper, etc., with a cold pressure bond using glue.

The present invention also provides at least two or more thin plates made of wood, a corrugated cardboard having the same size as the outline of the thin plates interposed between the thin plates, and a paper material made of recycled paper. And the laminated material that is to be bent by cold-bonding with glue, and one end or the center of the laminated material that is processed in this bending material processing step is fixed to the bending die. A step of fixing the laminated material to the bending die by using a clamp to press the laminated material to the bending die by sequentially blowing hot air to the laminated material from the fixing part, and fixing the laminated material to the bending die using a clamp; A method for manufacturing a laminated material that has been bent by a drying step of drying the laminated material fixed to the bending die in the fixing step in the fixing step to the bending die and a removal step of removing the laminated material from the bending die after the drying step are performed. I am configuring.

[0008]

With the laminated material to be bent constructed as described above, the paper material is cold-pressed with glue between the thin plates made of wood, so that the water content of the glue impregnates the paper material and the thin plates. It can be bent easily by blowing hot air.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 7, reference numeral 1 denotes a bending laminated material manufacturing step for producing a bending laminated material 2 and this bending laminated material processing step 1 Is wood, for example, having a thickness of 2 to 9 mm, a width of 300 to 1000 mm, and a length of 50.
At least two 00 millimeters, in this embodiment, three thin plates 3, 3, 3 and the outlines of the thin plates 3, 3, 3 interposed between the thin plates 3, 3, 3 are substantially the same size. Paper material 4, 4 made of cardboard base paper, recycled paper, etc.
As shown in FIG. 2, a laminated material 2 is manufactured in which the laminated materials 2 are attached in a stacked state, cold pressed and fixed by a press 6, and bent.

Reference numeral 7 is a step of fixing the laminated material 2 to be bent to a bending die 8 as shown in FIG.
In this fixing step 7 to the bending die, one end portion of the laminated material 2 to be bent at the lower end portion of the cylindrical bending die 8 is formed by a pair of anchor bolts 9, 9 as shown in FIG. A pressing plate 11 having insertion holes 10, 10 into which both ends are inserted, and nuts 12, 12 screwed onto the pair of anchor bolts 9, 9 so as to press the pressing plate 11. It is fixed by the clamp 13. Next, hot air is blown to the laminated material 2 to be bent from the portion fixed by the clamp 13 with a hot air blowing machine 14 such as a dryer, and the adhesive is softened by the water content and temperature rise of the glue, bending along the bending die 8 as desired, Laminated material 2 that is bent while being fixed with a clamp 13 at an arbitrary site
The whole is fixed to the bending die 8. In addition, after fixing the central part of the laminated material 2 to be bent by the clamp 13, hot air is blown in the direction of both ends sequentially, and the bending die 8 is bent by the bending clamp 13.
It may be fixed to.

After the fixing step 7 to the bending die, 15 is a drying step for drying the laminated material 2A to be bent fixed to the bending die 8 as it is as shown in FIG. After the step 7 of fixing to the bending mold, it is left as it is for a predetermined time or dried by blowing hot dry air.

Reference numeral 16 denotes the clamp 1 after the drying step 15.
3 is removed, and the dried and bent laminated material 2B is removed from the bending die 8 as shown in FIG.

The bent laminated material 2B constructed as described above has step plate supporting grooves 17 for inserting and supporting the step plate as shown in FIG. 7, and as shown in FIG. Used for side girder 19.

[0015]

Different Embodiments of the Present Invention Next, different embodiments of the present invention shown in FIGS. 9 to 17 will be described. In the description of these different embodiments of the present invention, the same components as those of the first embodiment of the present invention will be designated by the same reference numerals and redundant description will be omitted.

The second embodiment of the present invention shown in FIGS. 9 to 11 is mainly different from the first embodiment of the present invention in that the bending step is performed after the step 1 of the laminated material to be bent. Using such a step, a step plate supporting groove forming step 20 for forming a step plate supporting groove 17 for inserting and supporting the step plate in the laminated material 2 to be bent manufactured in the material processing step 1 is performed. By forming the side girders 19 of the curved stairs 18,
Since the step plate supporting groove 17 can be formed in a flat plate state, it can be easily and easily performed.

In the third embodiment of the present invention shown in FIGS. 12 to 14, the main difference from the first embodiment of the present invention is the step 7A of fixing to the bending die, which is the step of fixing to the bending die. 7A is a point in which the laminated material 2 to be bent is bent into a bending die 8 in a spiral shape so as to be a side girder 19A of a spiral staircase, and is fixed with a clamp 13. The side girders for stairs 19A may be formed.

The fourth embodiment of the present invention shown in FIGS. 15 to 17 is mainly different from the first embodiment of the present invention in the step of fixing to a bending die 7B. 7B is a bending die 8 in which the laminated material 2 to be bent is formed in a wave shape.
A clamp 13 is used to bend and fix to A.
The laminated material 2C bent in a wavy shape may be formed by using the fixing step 7B for the bending die.

[0019]

As is apparent from the above description, the following effects can be obtained in the present invention.

(1) At least two or more thin plates made of wood, a cardboard base paper having a size substantially the same as the contour of the thin plates interposed between the thin plates, and a paper material made of recycled paper, etc. Since cold-bonding is performed using glue, it is possible to manufacture a laminated material that is inexpensive and can be easily bent.

(2) According to the above (1), since the paper material is cold-pressure-bonded and fixed to the thin plate made of wood by using the glue, hot air is blown by utilizing the water content of the glue in the bending process. By doing so, it is possible to easily and freely perform bending.

(3) According to the above (1), the manufacturing can be performed without using a special manufacturing facility, so that the manufacturing can be easily performed without the capital investment.

(4) Claims 2 and 3 are also the above (1) to (3).
In addition to obtaining the same effect as above, it is possible to manufacture the side girders and the like such as the curved stairs and the spiral stairs that are freely bent by the easy work.

(5) According to the second and third aspects, the bending die is easily fixed by a clamp at one end or a central portion, and is blown with hot air, so that the bending die is easily and freely bent by the moisture and heat of the glue of the laminated material. be able to.

[Brief description of drawings]

FIG. 1 is a process drawing showing a first embodiment of the present invention.

FIG. 2 is an explanatory view of a processing step of a laminated material to be bent.

FIG. 3 is an explanatory view of a fixing process to a bending die.

FIG. 4 is a sectional view showing a clamp mounting state.

FIG. 5 is an explanatory diagram of a drying process.

FIG. 6 is an explanatory diagram of a removal process.

FIG. 7 is an explanatory view of a state in which a step plate support groove is formed.

FIG. 8 is an explanatory view of a curved staircase.

9 to 11 are explanatory views showing a second embodiment of the present invention.

12 to 14 are explanatory views showing a third embodiment of the present invention.

15 to 17 are explanatory views showing a fourth embodiment of the present invention.

[Explanation of symbols]

1: Laminated material processing for bending, 2: Laminated material for bending, 3: Thin plate, 4: Paper material,
5: glue, 6: press,
7, 7A, 7B: Fixing process to bending die, 8, 8A: Bending die, 9: Anchor bolt, 10: Insert hole, 11: Pressing plate, 12: Nut, 13: Clamp, 14: Hot air blowing machine, 15 : Drying step, 16: Removal step, 17: Stepped plate supporting groove, 18: Curved staircase, 19, 19A: Side girder, 20: Staircase supporting groove forming step.

Claims (3)

[Claims] 1. A paste comprising at least two or more thin plates formed of wood, a cardboard base paper having a size substantially the same as the contour of the thin plates interposed between the thin plates, and a paper material formed of recycled paper or the like. A laminated material to be bent, characterized by being cold-pressed and bonded by using. 2. A paste comprising at least two or more thin plates formed of wood, a cardboard base paper having a size substantially the same as the contour of the thin plates interposed between the thin plates, and a paper material formed of recycled paper or the like. A process for bending a laminated material to be cold-pressed by using, and one end or a central part of the laminated material processed in the bending laminated material processing step is fixed to a bending die, and the fixing is performed. Portion of the laminated material is blown with hot air in order to press the laminated material to the bending die, and the laminated material bent at a predetermined interval is fixed to the bending die with a clamp. Bending laminated material characterized by including a drying step of drying the laminated material fixed to the bending die in the process as it is, and a removing step of removing the laminated material from the bending die after the drying step. Method. 3. A paste comprising at least two or more thin plates formed of wood, a cardboard base paper having a size substantially the same as the outline of the thin plates interposed between the thin plates, and a paper material formed of recycled paper or the like. And a step of forming a step plate supporting groove for inserting and supporting a step plate in the bending laminated material processed in the bending step of the laminated material to be bent The plate supporting groove forming step and one end or the central portion of the laminated material that has undergone this step plate supporting groove forming step are fixed to a bending die, and hot air is blown from the fixing portion to the laminated material in order to press the laminated material to the bending die. , A process of fixing a laminated material bent at a predetermined interval to a bending mold using a clamp, and drying the laminated material fixed to the bending mold in the fixing process to the bending mold as it is After the drying process and the bending A method of manufacturing a laminated material that has been bent, comprising a step of removing the layer material.