JPH10337707A - Method and apparatus for consolidating timber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent delamination between laminated thin plate veneers and to prevent corrosion due to water leakage by simultaneously interposing sheet- like synthetic fiber to be melted at temperature for heat setting timber or higher between the veneers in the case of winding the veneer in a cylindrical state. SOLUTION: In the case of winding a thin plate veneer 1 in a cylindrical state to have a space at a center, sheet-like synthetic fiber 2 is interposed between the veneers 1 simultaneously winding and laminating. The veneer 1 is contained in a treating tank in the state that it is charged in a metal sheathing tube 3. A temperature in the tank is raised with steam, and the veneer 1 is uniformly softened by heating. An urging die is press-fitted in a central space of the veneer 1 in the tube 3, and the veneer 1 is compressed in a thickness direction and consolidated. Then, it is again heat treated with steam of higher temperature than that at the time of softening for a predetermined time, heat set, and drawn from the tube after cooling. Delamination between the veneers 1 is prevented, mechanical strength is improved, and corrosion due to water leakage is resisted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for consolidating wood, and more particularly, to a method for consolidating wood for producing cylindrical compacted wood used as a conduit for electric wiring, for example. And a device therefor.

[0002]

2. Description of the Related Art At present, the technique of consolidating wood has reached the stage of practical use, and various methods of consolidation have been tried. The purpose of consolidation of wood is to increase the mechanical strength and hardness of the wood by increasing the density of the wood structure, and to improve the quality of the wood and to make molding easier than conventional cutting. It is intended to enhance the value of wood use by improving productivity and the like, and is particularly expected for the effective use of soft wood or thinned wood.

[0003] For example, cylindrical compacted wood used as a conduit for electric wiring is formed by winding a thin single plate obtained by rotary cutting or slice cutting into a cylindrical shape so as to have a space in the center portion. After being softened with water vapor in a state of being loaded in a metal casing tube (pipe-shaped), a cylindrical or round bar-shaped indentation die is inserted into the center space of a thin sheet veneer wound in a cylindrical shape. It is manufactured by press-fitting to compress the thickness direction of a thin sheet veneer to be wound around, or by projecting an inner core mold inserted in advance in the radial direction and compressing the same, and then heat-setting the state by high-temperature heating.

[0004]

However, in the case of conventional compacted wood, only a single thin plate is rolled into a cylindrical shape and the compacted wood is compressed in the thickness direction. In addition, the bonding strength between the laminated single sheets laminated in a cylindrical shape after consolidation is low, and there is a possibility that the laminated single sheets laminated in a cylindrical shape after consolidation may be separated, and furthermore, it is also vulnerable to corrosion due to water leakage and the like. There are also problems.

[0005] In addition, the conventional cylindrical compacted wood is:
Wood to be consolidated (thin veneer rolled into a cylinder)
Because of the small thickness of the plate, even if it is consolidated to compress its thickness direction, there is naturally a limit to the increase in strength due to consolidation, and in places where strength is required, the woody feel is preferred. There is a problem that it cannot be used.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and completely prevents peeling between laminated single sheets laminated in a cylindrical shape after consolidation, and reduces mechanical strength as a cylindrical consolidated wood. It is an object of the present invention to provide a method and an apparatus for consolidating wood, which is capable of producing cylindrical compacted wood that is improved and is resistant to corrosion due to water leakage and the like.

[0007]

In order to achieve the above-mentioned object, the present invention provides a thin (single-plate) metal casing tube formed by winding a thin plate into a cylindrical shape with a space in the center. In the loaded state, after softening treatment with water vapor, a cylindrical or round bar-shaped pressing die is inserted into the center space of the cylindrical single-plated sheet veneer in the thickness direction of the cylindrical single-plated single plate. When press-fitting or compressing a pre-inserted inner core mold in the radial direction, and then heat-setting by high-temperature heating, when winding a thin veneer into a cylindrical shape Further, sheet-like synthetic fibers that are melted at or below the temperature at which wood is thermally fixed are simultaneously wound up, and the above-mentioned sheet-like synthetic fibers are interposed between thin single plates laminated in a cylindrical shape.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

1 to 3, (1) is a thin single plate obtained by rotary cutting or slice cutting, (2)
Is a synthetic fiber that melts at or below the temperature at which wood is heat set (eg, polyamide, polyester, etc.)
(3) is a cylindrical (pipe-shaped) metal casing tube, (4) is a press-fitting device, and a cylindrical or round bar-shaped press-in die (5) Is integrally attached to the tip of the piston rod (6a) of the hydraulic cylinder (6), and is integrated with the fixing member (7) via the bracket (8) by the extension operation of the piston rod (6a) of the hydraulic cylinder (6). Press the metal mold (5) into the attached metal pod (3).

Next, the method for consolidating wood in the present invention will be described.

First, the thin single plate (1) is wound into a cylindrical shape so as to have a space at the center. When the sheet veneer (1) is wound into a cylindrical shape, the sheet-like synthetic fibers (2) are simultaneously wound and the sheet-like synthetic fibers (2) are sandwiched between the sheet veneers (1) to be laminated in a cylindrical shape. Intervene.

Next, the thin sheet veneer (1) wound in a cylindrical shape is loaded into a metal casing tube (3), which is softened with steam. That is, a metal veneer tube (3) is loaded with a thin cylindrical plate (1) wound in a cylindrical shape and is housed in a processing tank (not shown) to supply steam into the processing tank. The temperature of the inside of the processing tank is raised by the steam. By placing the cylindrical veneer veneer (1) in the processing tank heated by steam in this way for a predetermined time, the cylindrical veneer veneer (1) is heated by steam. And soften uniformly.

Next, the thin sheet veneer (1) which has been softened with steam and wound into a cylindrical shape is compressed. That is, the metal casing tube (3) is integrally attached to the fixing member (7) via the bracket (8) in a state in which the thin sheet veneer (1) which has been softened and wound into a cylindrical shape is loaded therein. Then, the hydraulic cylinder (6) of the press-fitting device (4) is operated to operate the piston rod (6a).
Is extended, and the pushing die (5) is advanced by the extension operation of the piston rod (6a) to move the thin cylindrical single plate (1) loaded in the metal casing tube (3). Press into the center space. The press-in die (5) is pressed into the center space of the softened cylindrical single plate (1) to be loaded into the metal casing tube (3), thereby forming the cylindrical shape. In order to compress the veneered veneer veneer (1) in the thickness direction, the veneered veneer veneer (1) is consolidated.

Next, the compacted single-sheet thin plate (1) wound in a cylindrical shape is heat-fixed. That is, in a state in which the metal mold (5) is pressed into the center of the cylindrical single plate (1) loaded in the metal casing tube (3) and is pressed into the center, it is harder than in the softening process. When heat treatment is performed again with high-temperature steam for a predetermined period of time, the compacted single-layer thin plate (1) is thermally fixed by the steam.

Then, after cooling the heat-fixed cylindrical veneer veneer (1), removing the cylindrical veneer veneer (1) from the metal casing tube (3). By this, cylindrical compacted wood can be manufactured.

The cylindrical compacted wood produced according to the present invention is a sheet-like synthetic material which is melted at a temperature at which the wood is heat-fixed or lower when the thin veneer (1) is wound into a cylindrical shape. Since the sheet-like synthetic fiber (2) is interposed between the thin veneers (1) which are simultaneously wound up and laminated in a cylindrical shape, the interposed sheet-like synthetic fiber (2) Is melted and hardened to act as a hot-melt adhesive, so that the bonding strength between the consolidated cylindrical laminated sheets (1) is dramatically improved, and the consolidated cylindrical laminated sheets are laminated. Peeling between the veneers (1) can be completely prevented. Moreover, since the strength is increased by the melt-hardening of the sheet-like synthetic fiber (2) in addition to the increase in strength due to the compaction of the thin veneer (1), the mechanical strength as a cylindrical compacted wood is also remarkable. To improve. Furthermore, since a hydrophobic coating is formed by the sheet-like synthetic fiber (2) between the laminated thin veneers (1), cylindrical compacted wood which is resistant to corrosion due to water leakage and the like. Can be.

In the above embodiment, the pressing die (5) is press-fitted into the space at the center of the cylindrical veneer (1) to consolidate the veneer (1). However, the present invention is not limited to this, and the inner core die inserted in advance into the center space of the cylindrically wound thin single plate (1) is radially extended to project the thin single plate. The plate (1) may be compacted.

In the above-mentioned embodiment, the method of cooling after heat setting, the method of loading the thin cylindrical plate (1) into the metal casing tube (3), and the method of removing the same are not particularly limited. In addition, the thickness, the number of windings, the compression ratio, and the like of the thin single plate (1) are arbitrary and are not limited.

[0019]

As described above, according to the present invention,
A cylinder that completely prevents peeling between laminated single veneers after consolidation, improves the mechanical strength of cylindrical consolidation wood, and is durable against corrosion due to water leakage, etc. It has the advantage that it can be made into compacted wood, and although it has a woody feel, it can be used in places where it could not be used conventionally due to problems such as corrosion due to strength and water leakage, especially soft materials, Alternatively, thinned wood can be effectively used in a wide range.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a method and apparatus for consolidating wood according to the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thin veneer 2 Sheet-like synthetic fiber 3 Metal casing 4 Press-fitting device 5 Pushing die 6 Hydraulic cylinder 7 Fixing member

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[Procedure amendment]

[Submission date] June 9, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for consolidating wood, and more specifically, for example, a playground equipment for a park.
TECHNICAL FIELD The present invention relates to a method and an apparatus for consolidating wood for producing cylindrical compacted wood used as a safety fence or the like.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003] For example, cylindrical compacted wood used as a playground equipment or a safety fence in a park is obtained by winding a thin single plate obtained by rotary cutting or slice cutting into a cylindrical shape so as to have a space in the center. After being softened with water vapor in a state of being loaded in a metal (pipe-shaped) metal casing tube, a cylindrical or round bar-shaped indentation mold is inserted into the center space of a thin sheet veneer wound in a cylindrical shape. It is manufactured by press-fitting to compress the thickness direction of the thin sheet veneer wound in a cylindrical shape, or by extending the inner core mold inserted in advance in the radial direction and compressing it, and then heat-setting the state by high-temperature heating. You.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

1 to 3, (1) is a thin single plate obtained by rotary cutting or slice cutting, (2)
Is a synthetic fiber that melts at or below the temperature at which wood is heat set (eg, polyamide, polyester, etc.)
(3) is a cylindrical (pipe-shaped) metal casing tube, (4) is a press-fitting device, and a cylindrical or round bar-shaped press-in die (5) Paste taken at the distal end of the piston rod (6a) of the hydraulic cylinder (6), mounted integrally through the bracket (8) on the fixed member (7) by extending movement of the piston rod of the hydraulic cylinder (6) (6a) The metal mold (5) is pressed into the metal casing (3).

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

In the above-mentioned embodiment, the method of cooling after heat setting, the method of loading the thin cylindrical plate (1) into the metal casing tube (3), and the method of removing the same are not particularly limited. In addition, the thickness, the number of windings, the compression ratio, and the like of the thin single plate (1) are arbitrary and are not limited. Also,
In the embodiment, all of the thin plate veneer (1) wound in a cylindrical shape is used.
Although the sheet-like synthetic fiber (2) is interposed in the laminated portion,
Seat only at the end of winding of thin veneer (1) in the outermost layer
The synthetic fiber (2) may be retrofitted, or
In addition, metal hollows are formed in the hollow part of the compacted cylindrical compacted wood.
Filling with reinforcing material such as plastic to further increase strength
Of course, it is possible. Furthermore, the tip of the press-in die (5)
A guide rod that can be inserted into the center hole of the fixing member (7) at the end.
With the guide rod and push the center of the mold
Uniform thickness of cylindrically consolidated wood after consolidation
You may make it.

Claims (2)

[Claims] 1. A thin sheet veneer is wound in a cylindrical shape so as to have a space in the center, loaded in a cylindrical (pipe-shaped) metal casing tube, softened with steam, and then formed into a cylindrical shape. A cylindrical or round bar-shaped press die is pressed into the center space of the rolled thin veneer so as to compress the thickness direction of the rolled thin veneer, or an inner core inserted in advance. In the method of consolidating wood, in which the mold is stretched in the radial direction and compressed, and then heat-set by high-temperature heating, when the thin veneer is rolled into a cylindrical shape, the temperature is set at the temperature at which the wood is heat-set or lower. A method for consolidating wood, wherein the synthetic fibers to be melted are simultaneously wound, and the synthetic fibers are interposed between thin single plates laminated in a cylindrical shape. 2. A cylindrical metal casing tube for loading a thin sheet veneer wound with a sheet of synthetic fiber that melts at or below the temperature at which the wood is heat-set, and a cylindrical coil. After the thin veneer is placed in a metal casing tube and softened with steam, a cylindrical or round rod-shaped press die is inserted into the center space of the thin veneer rolled into a cylindrical shape. Means for press-fitting in a thickness direction of a thin sheet veneer wound in a cylindrical shape, or protruding in a radial direction a pre-inserted inner core mold and compressing it. .