JP4176006B2 - WOODEN FIBER MOLDED BODY AND METHOD FOR PRODUCING THE SAME - Google Patents

Description

  The present invention relates to a molded body composed of a wood-based fiber material, and in particular, a molded body in which a residual material obtained by removing materials from wood, a demolition scrap of a wooden building, etc. is reused as a structural material, a method for producing the molded body, and the molding The present invention relates to a civil engineering method and a planting method using a body.

  Conventionally, leftovers from wood, or scraps of wooden buildings are used alone as small materials such as piles, fences, or wall materials, and other than fermenting scraps into fertilizer soil, incineration or disposal Was. In recent years, a method is known in which several small cross-section timbers are mechanically bonded using bolts or the like, or a laminated material having a relatively large cross-section by sandwiching resin and pressure bonding to form a column or plate material. . On the other hand, there is also a method in which wood is made into a chip shape and resin is mixed to form a plate material and used as a wall material including an air layer. Furthermore, recently, methods for effectively using waste wood as chips have been actively developed. In addition to using the chip itself as a solid fuel, there is a method in which methane or hydrogen is generated and used as a fuel. There are also products that require deodorization and mildew prevention by carbonizing wood chips and mixing them with water or air filter media or wall materials.

  There is also a method of mixing wood chips with asphalt or resin and using them for cushioning wood chip pavement for foot protection that absorbs impact during walking, sidewalk pavement seeking landscape, etc. In recent years, as another utilization method, a utilization method in which wood chips themselves are sprayed with roses on natural ground around the planting of a garden to promote the herbicidal effect by mulching has become widespread.

  In addition, in connection with boards that are formed by reusing the remaining materials, thinned wood, etc., from which wood has been removed, the wood chips are steam-pressed and attached to the ground as a board for herbicidal and slope protection. There is something that promotes.

Also, as a mulching material that prevents the growth of pavement materials and weeds laid on boardwalks by heating and pressurizing by directly injecting steam onto wood chips and bonding them with self-bonding or molding adhesives Some are used (see, for example, Patent Document 1).
JP 2002-103521 A

  In general, as wood products other than materials, wood chips have been used as relatively hard members that are hardened with resin. As a method of using as a soft member, there are papers using cellulose of wood, but there is a problem that the thickness cannot be secured when trying to use it for agriculture and construction materials because it is relatively thin. As an example of the flexible material, there is a material in which a palm mat and jute (hemp) are steam-compressed to produce a wood mat. This is used as a gardening and construction material to protect the slopes of natural ground.

However, in order to obtain raw materials such as palm fiber and jute, there is a problem that most of them must be imported.
Other flexible sheet-like molded products include molded products knitted from jute, rice straw, and rush, such as hemp bags, goza, and tatami mats. Furthermore, it is difficult to increase the thickness unless the folding machine is enlarged or overlapped. In addition, there is a method of using waste wood to make a flexible sheet-like molded body. However, if the waste wood is simply crimped, the whole body is crimped and the molded body becomes plate-like and hardens. It will damage the sex.

  In addition, we make use of readily available waste wood with as little processing effort as possible, and form a flexible board as a whole, laying it to protect slopes, scouring and preventing runoff of natural ground and embankments. It has been very difficult to do so far. Furthermore, in the prior art (Patent Document 1), after the sheet adhesive is applied to the first and second plate members, the laminate of the first and second plate members is laminated on the sheet and heated at room temperature or heated. Further, since the bark board is formed by pressurizing and bonding, a plurality of processes and raw materials are required, and there is a problem that costs increase. In order to give flexibility to the bark board, the structure is made by laminating the first board member with high cushioning properties on the hard second board member, so it efficiently absorbs the impact from the vertical direction on the bark board surface. Yes, but the shock cannot be absorbed from all directions with respect to the board plane. Therefore, there is a problem that it is difficult to freely curve the board itself as a whole, and overall flexibility cannot be obtained.

  The present invention has been made to solve the above-described problems, and can be easily manufactured by reusing a wood-based fiber material as a constituent material, and has overall flexibility for agricultural and civil engineering construction. It is an object of the present invention to provide a wood fiber molded body, a manufacturing method thereof, a civil engineering method and a planting method using the molded body.

The invention according to claim 1 is a method in which a large number of wood fibers 4 having a natural fiber length of 30 mm to 80 mm are laminated, and each of the natural fiber lengths of the wood fibers 4 is 1 from the upper direction or the vertical direction of the laminated wood fibers 4. The mesh body L has a mesh size L having a length of 2 or less, and the mesh body is press-molded using the mesh bodies 3 and 3 'which are in contact with each other at at least two locations of the respective wood fibers 4, and the mesh bodies 3 and 3 A flexible wood that forms a pressure-bonding portion 2 on a wood fiber 4 that abuts on and forms a wood fiber layer 1 having an air layer close to the original shape of the laminated wood fiber 4 in a portion surrounded by the pressure-bonding portion 2 It is a manufacturing method of a fiber formation body (woody mat 10).

  Here, the mesh size L refers to the mesh interval of the mesh steel plate 3. More specifically, it refers to a distance representing the size of the gap between the mesh-like crimping part 2 and another mesh-like crimping part 2 adjacent thereto. When the mesh steel plate 3 having a substantially square mesh is used, the mesh size L in the vertical and horizontal directions has the same value. However, it is not limited to this, and the mesh size L in the vertical and horizontal directions may take different values depending on the mesh shape (for example, rectangle, triangle, etc.) of the mesh steel plate 3 to be used. However, when setting different values, it is necessary to select the sieve size based on the larger mesh size L as a result of comparing the values of the mesh size L in the vertical and horizontal directions.

  The natural fiber length refers to the fiber length of the main fiber of the bark remaining after peeling the bark from logs such as cypress, pulverizing the bark and sieving it through a predetermined sieve. Therefore, it does not mean a specific length, and any fiber that does not fall off the sieve mesh may be curved, for example, spiral or curved, and any shape can be defined as the natural fiber length. include. In addition, although the case where a bark was employ | adopted as a raw material of the wood fiber 4 was demonstrated, the net | network dimension L and the natural fiber length can be similarly defined also with the piece of wood which cut wood into the ribbon shape along the fiber direction.

The invention according to claim 2 is formed by laminating a large number of wood fibers 4 having a natural fiber length of 30 mm to 80 mm, contacting at least two locations of each wood fiber 4, and ½ of the natural fiber length or more A wood fiber comprising a pressure-bonding portion 2 having a mesh size of the following length, and a wood fiber 4 having an air layer in a state close to a large number of stacked layers formed in a portion surrounded by the mesh-like pressure-bonding portion 2 It is a flexible wood fiber formed body constituted by layer 1 .

The invention according to claim 3 is a civil engineering method in which the flexible wood fiber molded body (wood mat 10) according to claim 2 is placed in a natural ground after cutting a natural ground or in a formation area to be embanked to be a natural ground in the future. It is.

Invention of Claim 4 is the planting construction method which arrange | positions the flexible wood fiber molded object (wood mat | matte 10) of Claim 2 in a planting land or a farm field.

According to the first and second aspects of the present invention, the wood fiber 4 constituting the pressure-bonding portion 2 of the wood mat 10 is most pressurized and compressed and cured, and the wood fiber 4 constituting the wood fiber layer 1 is not much added. Since it is not pressed, it does not harden so much and remains in a state close to the original pattern (a state in which raw materials are laminated before pressing). Therefore, the crimping | compression-bonding part 2 can be dented in groove shape, and the wooden mat 10 can be curved centering on the part, and the wooden mat 10 has the softness | flexibility as a whole. Moreover, when the crimping part of the crimping | compression-bonding part 2 bends in groove shape, when it bends, it becomes a thin and easy-to-bend structure. Furthermore, even a short fiber that is entangled with the main fiber and does not reach the slight mesh remaining on the sieve is entangled with the main fiber and compressed during pressing.
  Further, the wood fiber layer 1 is constituted by the wood fibers 4 surrounded by the reticulated iron nets 3 and 3 'and not so much pressed, and the wood fibers 4 there are not closely bonded to each other. Since the fiber is in a loosely bonded state and the flexibility of the fiber itself remains, the cushioning property is high. On the other hand, the fiber length of the wood fiber 4 having a relatively long natural fiber length is longer than the mesh size, and one wood fiber 4 is pressed by being brought into contact with the mesh steel plates 3, 3 ′ at at least two contact points. Thus, the structure is hard to be loosened even if a tensile force is applied in all directions on the mat plane.
  In each section of the wood fiber layer 1, the wood fiber 4 is fixed to the wood mat 10 in a state of being naturally bent. Therefore, the wood fiber 4 remains in a state close to the original shape without being crushed, and voids The fiber itself has flexibility and heat and moisture retention because it has many parts and has an air layer. Furthermore, since the density of the wood fiber 4 of the raw material contained in the wood mat 10 according to the present invention can be managed with relatively high accuracy, the finished product can be easily managed even if the wood mat 10 is used as a product. Furthermore, the wood mat 10 of the present invention can be easily transported.

According to invention of Claim 1, 2, the wood fiber layer 1 which has the air layer of the state close | similar to the original form of the wood fiber 4 hold | maintained and enclosed by the crimping | compression-bonding part 2 is flexible and heat retention moisturizing property to fiber itself. In addition, since the density of the wood fiber 4 of the raw material contained in the wood mat 10 can be managed with relatively high accuracy, the finished product can be easily managed even if the wood mat 10 is used as a product. The wood mat 10 of the invention is flexible, easily bent, and excellent in workability and transportability.
According to the third and fourth aspects of the invention, it is possible to manufacture a wood fiber molded body (wood mat 10) simply and at low cost by reusing the wood fiber material as a constituent material, which is highly flexible and easy to handle. Therefore, it can be used for applications such as protection of slopes and scouring of natural mountains and embankments, civil engineering methods, greening methods, etc., and it can also be used effectively as building materials such as reinforcing materials, heat insulating materials, moisturizing materials or soundproofing materials. A molded body and a method for producing the same can be provided.

A wood fiber molded product according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a wood mat 10 which is a wood fiber molded body of this embodiment. In the above-mentioned wood fiber molded body of this example, the bark is crushed as it is or after being crushed slightly short or reused, or the remaining material obtained by removing the material from the wood, thinned wood, etc., is cut out in the fiber direction and ribbon-shaped. (Tap the fiber to loosen it) and reuse it. Bark and wood shavings may be mixed. In the present specification, the term “woody fiber” refers to bark, wood cut out, or both.

  First, a reticulated iron mesh plate 3 'having a mesh of a predetermined size shown in FIG. 2 is arranged on the lower surface side of the hot press apparatus, and a box frame (not shown) is placed so as to surround the reticulated iron steel plate 3'. Next, the wooden mats 10 are formed by laminating the wooden fibers 4 in the box frame at random while laminating them and pressing with a mesh steel plate 3 that holds at least two natural fiber lengths of the wooden fibers 4 from above. . At this time, the reticulated steel plate 3 and the reticulated steel plate 3 'are arranged and pressed so that the meshes of the reticulated steel plate 3' coincide with each other in the vertical direction. The wood fiber 4 contains lignin and tannin and self-adheres by pressurization, but it is more preferable to heat and pressurize while spraying water and adding steam. Alternatively, the wood fiber 4 may be coated with a small amount of an adhesive such as a resin in advance, and the adhesive may be used as a binder for reinforcement bonding. It is even better if this resin is a biodegradable resin.

As shown in FIG. 1, the thus obtained wood mat 10 is groove-shaped square slightly crimped woody and the crimping portion 2 formed by the mesh steel plate formed from a concave surrounded by those piezoelectric attaching portion 2 The fiber layer 1 is a configuration.

  The number of the wood fiber layer 1 and the mesh steel plate crimping portion 2 (hereinafter referred to as the mesh crimping portion 2) is determined by the mesh size L of the wood mat 10 to be molded. Further, the thickness of the wood fiber layer 1 depends on the amount of the raw material wood fibers 4 laminated, and the thickness of the net-like pressure-bonding portion 2 is the amount of the raw material wood fibers 4 laminated and the net-like iron net 3 used for pressing, Depends on 3 'thickness. For example, when forming the relatively thin wood mat 10, it is not necessary to use the reticulated steel plates 3 and 3 'on both sides of the upper and lower surfaces of the hot press apparatus, and it may be used only on one side. It is more flexible if there are grooves on both the upper and lower sides than on one side.

  In the wood mat 10 formed by pressing in this way, the wood fibers 4 constituting the net-like pressure-bonding portion 2 are compressed and hardened most. On the other hand, the wood fibers 4 constituting the wood fiber layer 1 are not so pressurized, and therefore remain in a state close to the original shape (a state in which raw materials are laminated before pressing) without being hardened so much.

  Therefore, the net-like pressure-bonding portion 2 is recessed in a groove shape, and the wood mat 10 can be bent around the portion, and the wood mat 10 has flexibility as a whole. Moreover, when the crimping | compression-bonding part of the net-like crimping | compression-bonding part 2 is dented in groove shape, it becomes a structure easy to bend thinly when bending. Furthermore, even a short fiber that is entangled with the main fiber and does not reach the slight mesh remaining on the sieve is entangled with the main fiber and compressed during pressing.

  The wood fiber layer 1 is constituted by the wood fibers 4 surrounded by the mesh steel nets 3 and 3 'and not pressed so much, and the wood fibers 4 there are not closely bonded to each other and are relatively loosely bonded. In the state and the flexibility of the fiber itself remains, cushioning is high.

  On the other hand, since the wood fiber 4 having a relatively long natural fiber length is sieved and used as a raw material, the fiber length is longer than the mesh size L, and one wood fiber 4 has at least two contact points. Since it is pressed and hardened inside the reticulated pressure-bonding portion 2 in contact with the reticulated steel plates 3, 3 ′ (FIG. 2), it has a structure that is difficult to loosen even if a tensile force is applied in all directions on the mat plane. .

  The net-like pressure-bonding portion 2 has a groove-like concave surface on the front and back surfaces of the wooden mat 10. The shape of the groove depends on the shape of the mesh steel plate 3, 3 '. The net-like press-bonding portion 2 is formed by pressing the wood mat 10 between the two upper and lower mesh-like steel plates 3 and 3 ′, which are arranged at positions that are accurately overlapped, and pressing the wood mat 10 vertically from the up-and-down direction. Generally, wood fiber contains lignin, tannin, and the like, and self-adhesive by being pressurized, but may be hot pressed by adding steam. The press surface of the reticulated steel plates 3 and 3 ′ may be a curved surface or a spherical surface, and may have any shape as long as it has a press surface to which the wood fiber 4 can be crimped. In addition, a net-like convex part having a predetermined mesh size L may be provided on the press contact surface itself of an upper-lower press (not shown) without installing the net-like pressure-bonding part 2 between the upper and lower press plates. .

Hereinafter, with reference to FIG. 2, the specific structure of the wood fiber layer 1 and the net-like pressure bonding part 2 will be described.
FIG. 2 is a conceptual diagram showing the positional relationship between the wood fiber 4 and the mesh steel plate 3 when the wood mat 10 is formed, and FIG. 3 is a schematic cross-sectional view showing the relationship between the wood fiber 4 and the mesh crimping portion 2.
As shown in FIG. 2 and FIG. 3, the wood fiber 4 uses a material having a natural fiber length longer than the mesh size L of the mesh steel plate 3 as a main raw material, so that the inside of the compartment of one wood fiber layer 1 is used. In this case, most of the fiber pieces have at least two crimping points S. In each section of the wood fiber layer 1, the wood fiber 4 is fixed to the wood mat 10 in a state of being naturally bent. Therefore, the wood fiber 4 remains in a state close to the original shape without being crushed, and voids Many parts are left, and it has an air layer.

  Therefore, when the fiber itself is made flexible and heat-retaining and moisturizing due to the characteristic structure of the present embodiment, the wood fiber 4 is spoiled when only the wood fiber 4 is used as a raw material or a biodegradable resin is mixed as a binder. Thus, the wood mat 10 that can be reused as fertilizer can be provided.

  Moreover, since the density of the wood fiber 4 of the raw material contained in the wood mat 10 according to the present embodiment can be managed with relatively high accuracy, the finished product can be easily managed even if the wood mat 10 is used as a product. Can do. Further, the wood mat 10 according to this embodiment can be easily transported.

Next, when the wooden mat 10 according to the present embodiment is constructed on the natural ground, the wooden mat 10 is fixed to the natural ground with the anchor 6 shown in FIG. 4 to such an extent that it does not move. As shown in FIG. 10, when the wooden mat 10 is provided on a natural slope or the like, the number capable of stopping the sliding is calculated in consideration of the weight of the upper portion of the wooden mat 10. And the anchor 6 is fixed to a natural ground. Position to penetrate the natural ground anchor 6 via a wood mat 10, the wood mat 10 may have to move on the earth, it is not particularly limited. The anchor 6 is preferably made of a material that does not corrode semipermanently, for example, a steel material having a zinc coating, or a resin material such as plastic.

  Here, a specific manufacturing method of the wood mat 10 according to the present embodiment will be described with an example. The bark of logs such as cypress is peeled from the wood sawmill, this bark is crushed, and a relatively long bark (for example, 30 to 80 mm is mainly composed) left over a 4 mm sieve is used. The present embodiment can be used not only for bark but also for a piece of wood obtained by cutting wood into a ribbon shape along the fiber direction.

  As shown in FIG. 2, a reticulated steel plate 3, 3 '(for example, a wire diameter of 2.6 mm and a mesh of 22 mm was used on the lower surface of the upper and lower press plates. Although not limited to the mesh size, it is 1/2 of the natural fiber length of the main component. The wire diameter is related to the thickness of the mat to be manufactured and the mesh size, and the thicker the thicker, the thicker the thicker.) A box frame is placed so as to surround the reticulated steel plate 3, and the bark or the like crushed is randomly placed therein (for example, 100 mm thick).

  At this time, the pressing needle penetrates the wood fiber that is laminated with the board vertically dotted with the needles like a sword mountain used for ikebana from the top. If it does in this way, some fibers of the upper part of a layered product will be arranged in some places so that it may penetrate up and down of a layered product, and the up-and-down unity of the wood fiber layered product mentioned below further increases. Further, the top of the laminated wood fibers is leveled, and the reticulated steel sheet 3 coated with petrolatum from above is perpendicular to the mesh on the lower surface so that the reticulated steel sheet 3 'and the reticulated mesh overlap. Place it on the extension line. Thereafter, the box frame (not shown) is pulled upward, and the bark is crushed with a hot press device (for example, about 140 ° C. to 190 ° C.) to press the wood mat 10 (finished thickness, for example, about 10 mm) Is formed.

  In the molded wood mat 10, groove-like streaks (net-like pressure-bonding portions 2) remain in a mesh shape at substantially the same coordinate positions on the upper and lower surfaces. In the perspective view of the wooden mat 10 in FIG. 1, when the left side and the right side of the wooden mat 10 are lifted upward, the central portion of the wooden mat 10 remains in contact with the installation surface of the wooden mat 10 by gravity. However, the groove-like streaks (net-like pressure-bonding portion 2) that are separated from the center of the wood mat 10 in the left-right direction are appropriately curved. Therefore, the flexibility of the wood mat 10 as a whole can be enhanced by this structure of the present embodiment.

  The wood fiber 4 such as bark may be hot-pressed as it is when hot-pressing, but it may be sprayed with steam in order to improve adhesion. Furthermore, although the reticulated steel plates 3 and 3 'are flat surfaces in this embodiment, there is no problem even if they have a slightly bent and uneven surface.

  In the present embodiment, the mesh wire constituting the mesh steel plates 3, 3 'is a continuous rod-shaped member, but is not limited to this, and may be a discontinuous rod-shaped member that is broken halfway.

  In this example, the self-adhesive property of the wood fiber 4 was used to obtain a mat-like molded body simply by hot pressing, but an adhesive such as a resin was sprayed and permeated only on the mesh portion. It is also possible to increase the tensile strength in all directions of the mat plane. Further, a coating agent such as a resin can be sprayed on the entire wood mat 10 to suppress the standing. With such a configuration, a rubber resin or a flexible resin is mixed as a binder as a whole, and the entire amount depends on the adhesive performance of the binder itself, so that the required amount of resin can be reduced compared to the mat to be molded.

  In this embodiment, bark was used, but long fiber ribbon chips were made and beaten with a wood crusher that cuts in the fiber direction of the wood, and the wood mat 10 could be produced in the same manner as the bark. Even the generated leaves and branches can be used as the raw wood fiber 4 if they have fiber.

  Furthermore, the form which gives a process to the said wood fiber molded object as an additional Example is described. The wood mat 10 shown in the above embodiment is self-adhesive in a net-like shape, but the self-adhesion force due to lignin and tannin is relatively weak, and there are some that require tensile strength depending on the purpose of use for the wood mat 10. . For example, if it is used as a covering material for natural ground when it is close to a flat ground, the tensile strength is not so much required, but if it is covered with a slope and fixed with an anchor 6, at least a strength that prevents a person from going up and sliding down is necessary. . In such a case, when pressing the wood fiber molded body described in the above-described embodiment with the reticulated steel plates 3 and 3 ′, a press surface having a deliberately high height is formed on the portion in contact with the wood fiber formed body of the reticulated steel plate 3. The press surfaces having a low height are alternately provided, the press surfaces having a low height have a flatness so as to compress the wood fibers 4, and the press surfaces having a high height are sharpened so as to pierce the wood fibers 4.

  FIG. 5 shows a reticulated crimping portion of a reticulated steel plate 3-1, a wood fiber molded body (wood mat 10), and a lower surface reticulated steel plate 3 'in which sharply high press surfaces and low press surfaces are alternately arranged. The conceptual diagram showing the positional relationship of 2 is shown. In this embodiment, a grinder is cut on one side of a 9 mm thick plate having a 30 mm square cutout in a net shape (a portion in contact with the wood fiber 4), and a press surface having a high height and a press surface having a low height at intervals of 5 mm. Were provided alternately. Furthermore, the tip of the high press surface was polished in parallel with the cut wall to make a sharp tip. The drop in the height direction of the two press surfaces was 4 mm. The size of the cut-out square, the thickness, and the drop of the mesh steel plate can be changed depending on the length of the wood fiber 4 and the thickness of the wood fiber molded body (wood mat 10) after molding.

  As shown in FIG. 5, as a reticulated steel plate 3 ′ disposed on the opposite surface (lower side) in contact with the wood fiber laminate during pressing, a 30 mm square cutout is provided on the reticulated steel plate 3-1 on the upper surface side. And a flat steel plate 3 ′ having a flat bottom surface with a thickness of 3 mm cut out so that the mesh is located at the same position. The wood fiber laminate is sandwiched so as to be arranged at the same vertical position as that of the upper surface side steel sheet 3-1 and pressed in the same manner as described above. At this time, a spacing material (10 mm dice-shaped iron material (not shown) in this embodiment) is provided between the upper and lower mesh steel plates 3-1 and 3 ′ so as not to crush the sharp and high press surface when pressed. ) On the outside. As shown in FIGS. 6 and 7, when the reticulated steel sheets 3-1, 3 'are pressed, the wood fiber laminated body has a reciprocal pressure-bonding portion (sometimes simply referred to as a groove) 2 and a hole at the bottom of the groove. The groove bottom holes 2-1 which are the contact portions are alternately held, and the crimping portions 2 are cut in dotted lines at the groove bottom holes 2-1. FIG. 6 shows a pressed surface 3-1-a (cross section cut along aa of the upper mesh steel plate 3-1 shown in FIG. 5) and the wood fiber after pressing of the mesh steel plate 3-1. 7 is a local cross section of the mesh-shaped crimping part 2 and FIG. 7 is a sharp section of the press surface 3-1-b with a high height of the mesh steel plate 3-1 (b of the mesh mesh steel plate 3-1 shown in FIG. -B) and a local cross section of the net-like pressure-bonding portion 2 of the pressed wood fiber 4 and shows a state in which the wood fiber 4 is sheared and a hole is formed at the groove bottom. In the present embodiment, the steps up to here are performed by a primary press.

  FIG. 8 is a cross-sectional view in which a fixing plate 7 locally provided with a sponge-like material containing an adhesive is disposed above the groove bottom hole 2-1 formed by the mesh steel plates 3-1, 3 ′. FIG. 9 shows a cross section of the groove 2-2 with the adhesive obtained by putting the adhesive into the groove bottom hole 2-1 formed in the molded body of the wood fiber 4 and allowing the adhesive to permeate and adhere. When the self-adhesion is weak in the molded body of the relatively thick wood fiber 4, and when it is desired to enhance the tensile strength depending on the purpose of use, the reticulated steel body 3-1 is provided with a high and low two-step press surface and the groove 2 and the groove bottom hole 2 -1 is made, an adhesive is locally injected into the groove bottom hole 2-1, and the wood mat 10 is fixed at the position of the groove 2-2 containing the adhesive. Any adhesive may be used as long as it has the property of being fixed from a liquid, but it should be relatively flexible after curing. When a biodegradable resin is used as an adhesive, the material is still expensive, but according to the present invention, it penetrates only into the net-like groove 2 and the groove bottom hole 2-1, rather than being used as a whole. It is economical because it uses less amount. The adhesive is not limited to a synthetic resin, but includes an organic substance that is fixed from a liquid such as starch paste, glue, or casein.

  Explaining as an example of production, a wooden mat 10 having a groove 2 and a groove bottom hole 2-1 on the surface is obtained by first pressing a molded body of the wood fiber 4 with a net 3-1 having a press surface with two steps of high and low, Next, a sponge-like fixing plate 7 containing an adhesive is placed at the position of the groove bottom hole 2-1, and when the fixing plate 7 is lightly secondarily pressed, the fixing plate 7 is pressed into the groove bottom hole 2 by pressure. -1 and the contained adhesive is pushed out from the fixing plate 7 to the groove 2 and the groove bottom hole 2-1 with pressure. The adhesive fills the hole and penetrates into the wood fiber layer 1.

  The groove bottom hole 2-1 is made by shearing and is relatively sparse compared to the groove 2, so that the adhesive easily penetrates. When this adhesive is hardened, the wood fiber layer 1 is fixed with the adhesive in a form of sewing in the thickness direction. The method of injecting the adhesive is not limited to this, and it may be injected individually as a syringe, or the cut plate cut out at the position of the mesh 3-1 is overlaid on the wood fiber layer 1 and the adhesive is poured from above. It may be penetrated locally by gravity, centrifugal force or pressure. By locally injecting the adhesive into the groove 2 and the groove bottom hole 2-1, the wood fiber layer 1 is sewn and the structure is difficult to loosen, and the integrity of the molded body obtained from the wood fiber 4 is increased. The tensile strength is also increased.

An example of the civil engineering / greening method in which the wood fiber molded body (wood mat 10) according to the present embodiment is arranged in an arbitrary formation area will be described.
As shown in FIGS. 10 and 11, roads, railway shoulders, creation sites, parks and other slopes of natural ground or embankment after the removal of natural grounds (see FIG. 10) of the present embodiment in any standard area. A wooden mat 10 is attached and fixed with a semi-permanent anchor 6. As a construction sequence of the wood mat 10, first, the ground is stirred and leveled. In the case where the natural ground has irregularities, it is only necessary to bring in soil with small eyes from the outside as a crush to spread the wooden mat 10 in close contact with the natural ground.

  And it sticks so that a space | gap may not be made between the wooden mat 10 concerning this example, and the natural ground. As shown in FIG. 4, the wood mat 10 having a certain standard size is used as a unit mat, and if these are arranged so as to spread, the workability can be improved. It is desirable that the unit mat has a small area. Even if a part of the unit mat is separated from the ground for some reason, it is possible to minimize the trouble that the mat pulls other mats and many mats separate from the ground. It is.

  The wood mat 10 according to the present embodiment constructed on the natural ground is fixed to the natural ground with the anchor 6 so that it does not move. Further, when the wooden mat 10 is provided on the slope of the natural ground as shown in FIG. 10, the number of anchors that can stop the sliding is calculated in consideration of the weight of the upper portion of the wooden mat 10 and fixed to the natural ground. The anchor 6 is preferably made of a material that does not corrode semipermanently, for example, a steel material coated with zinc, or a resin material such as plastic. Specifically, the number of anchors 6 that do not deviate even if the weight of the wooden mat 10 and a person rises on the wooden mat 10 are driven into the wooden mat 10 and fixed. The anchors 6 are arranged mainly on the overlapping part of the mat outer periphery and the end of the wood mat 10.

  According to the wood mat 10 of this embodiment, since it has flexibility as a whole, it is used as a curing material for protecting the slope and preventing scouring by sticking it to the ground surface with the anchor 6 and sticking it. Since it can be bent relatively easily, it is possible to save labor for transportation and construction by folding. Moreover, stable vegetation construction can be performed by mixing grass seeds and fertilizer into the wooden mat 10 and sticking them to the slope. The wood mat 10 of the present embodiment is a reduction type and has a merit that it can be returned to the soil after being corroded with less environmental load as compared with the conventional anti-flow-off work made of synthetic resin. In addition, because domestic waste wood can be used, materials can be obtained indefinitely without relying on imports, and they can be used as vegetation curing materials such as reinforcing materials, protective agents, turf, etc. without cost, insulation materials, oil It can be used for construction methods such as adsorbents, heat insulating materials for pipes, and cushion materials.

  Furthermore, the wood mat 10 according to this embodiment can be applied to a planting method. In general, wood chips are planted with roses, spread around agricultural crops and used for weed prevention mulching materials, etc. As shown in the cross section of the planting zone in FIG. If it is fixed to the green area and attached, it will have a stable effect without being scattered by the wind or flowing out by rain compared to the rose state. Therefore, when used for mulching in the form of a conventional rose, it could be used only on a flat ground because of the risk of outflow, but the wood mat 10 of this embodiment is an effective mulching material particularly for slopes (not shown).

  Next, an example in which the wood mat 10 is used for afforestation of a mountain with many slopes is shown. In afforestation, seedlings of cypress and cedar are planted in the mountains, and growth is hindered by weeds that usually grow around the seedlings for 5 to 6 years. This caused a considerable burden on the site due to the aging of workers and the decline in the unit price of timber. In the pressing of the wood mat 10, the formation of the net-like pressure-bonding portion 2 is pressed as it is to increase the density.

  Use wood and bark with slow decay rate as wood fiber material. Furthermore, if necessary, a flexible wood mat 10 with a slow decay rate can be produced by coating it with a preservative that has a low environmental impact, and if it is pasted around an afforested plantation tree with an anchor 6, it will flow or scatter. The stable mulching effect prevents weed breeding for several years and reduces the need for mowing, and then returns to the soil.

  Further, when the wood mat 10 of the present embodiment is used for crop mulching, the characteristic structure of the wood mat 10 of the present embodiment can efficiently promote weed removal, water retention effect and heat retention effect by mulching. In addition to protecting the crops in this way, it will also become a fertilizer by plowing into the field in a few years. Therefore, there is an advantage that the difficulty in disposal of the mulching sheet made of synthetic resin after harvesting, which is a conventional problem, can be solved without any cost.

  TECHNICAL FIELD The present invention relates to a molded body composed of a wood fiber material, and in particular, a flexible wood fiber molded body that is reused as a constituent material such as residual material from which wood is removed, thinned wood, demolition scrap of a wooden building and the like, and its manufacture It can be used for methods and effective utilization methods.

The perspective view of the wood mat which is a present Example is shown. It is a conceptual perspective view which shows the positional relationship of a wood fiber and a mesh steel plate at the time of shaping | molding the wood mat of FIG. It is a cross-sectional conceptual diagram which shows the positional relationship of the wood fiber in a wood mat of FIG. 1, and a groove-shaped crimping | compression-bonding part. It is an example showing the arrangement | positioning state of the anchor which lays the wood mat of FIG. It is a conceptual perspective view which shows the arrangement | positioning relationship at the time of attaching a sharp convex to the part which touches a wooden mat | matte to a reticulated steel plate. The local sectional view of the wooden mat after pressing the wooden mat with the concave portion of the mesh steel plate. The local sectional view of a wooden mat after pressing a sharp convex part of a reticulated steel plate to a wooden mat. Local sectional drawing which shows the position of the sponge which made the wood mat and the groove | channel and the adhesive agent included. A local sectional view in which an adhesive is infiltrated into a groove and a hole formed in a wood mat is shown. It is an example which laid the wooden mat 10 of FIG. 1 on the slope of the natural ground of a road. It is an example which laid the wood mat 10 of FIG. 1 in the plane planting land.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wood fiber layer 2 Reticulated pressure bonding part 2-1 Groove bottom hole (reticulated pressure bonding part) 2-2 Bonded pressure bonding part 3 Reticulated steel sheet 3 'lower surface side reticulated steel sheet 4 Wood fiber simple substance 6 Anchor 7 Fixing plate 10 Wood mat

Claims (4)

A large number of wood fibers (4) having a natural fiber length of 30 to 80 mm are laminated, and 1/2 of the natural fiber length of the wood fibers (4) from above or from above and below the laminated wood fibers (4), respectively. Alternatively, the mesh (3, 3 ′) having a mesh size with a length less than or equal to that of the wood fiber (4) is press-molded, and the mesh (3 , 3 ') is formed on the wood fiber (4) in contact with the pressure-bonding portion (2), and an air layer in a state close to the original shape of the laminated wood fiber (4) is formed in a portion surrounded by the pressure-bonding portion (2). A method for producing a flexible wood fiber forming body, comprising forming a wood fiber layer (1) having the wood fiber layer . It is formed by laminating a large number of wood fibers (4) having a natural fiber length of 30 mm to 80 mm, contacting at least two locations of each wood fiber (4), and having a length that is 1/2 or less of the natural fiber length. And a wood fiber (4) having an air layer in a state close to a large number of stacked layers formed in a portion surrounded by the mesh-like pressure-bonding part (2). A flexible wood fiber formed body comprising a wood fiber layer (1) . A civil engineering method characterized in that the flexible wood fiber molded body according to claim 2 is disposed in a natural ground after cutting a natural ground or in a formation area to be embanked to be a natural ground in the future. A flexible wood fiber molded product according to claim 2 is disposed on a planting site or a farm field.

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