JP6487384B2 - Plywood - Google Patents

Description

  The present invention relates to a plywood iron plate provided with a plate material made of plywood (plywood).

Depending on the material and structure of the board, there are natural wooden caskets, plywood caskets, and corrugated board caskets. Among these, the plywood steelmaking employs a hollow structure using a plywood (plywood) called a flash structure as the main part of the plate material. Because of the structure of the plate material, it may be referred to as a flash rod.
Usually, a plywood is manufactured by laminating thinly cut veneer plates with an adhesive so that the fiber directions are staggered by 90 °, and then hot-pressure bonding.
The flash structure is originally known as the structure of a wooden board such as furniture, and is formed by sandwiching a core material (square material) between a pair of 2 to 3 mm thick plywood. In other words, the portion surrounded by the two plywoods and the core material is hollow, and the plate thickness is light and easy to handle, contrary to the apparent thickness.

A conventional plywood iron making using such a flash structure plate is shown in FIG.
The plywood casket 1 is provided with a lid 3 on a box-shaped casket body 2 so as to be freely opened and closed. A plate material having a flash structure is adopted for the bottom plate 2A of the main body 2, the left and right side plates 2B and 2B, and the top plate 3A of the lid 3. Although not shown in FIG. 12, a similar flash structure is also adopted for the end plate of the main body 2 that is raised before and after the bottom plate 2A.
Each of these plate materials has a thin (2 to 3 mm thick) plywood wall on the inside and outside of the ridge, and a core material g is sandwiched between these plywoods f. The inside of the plate material is a cavity h surrounded by the plywood f and the core material g. The surface of the plywood f is decorated with a wood grain pattern or the like.
Such a plywood casket 1 is easy to handle, such as carrying a cocoon, because of its light weight, and a thin plywood is easy to burn during cremation and has excellent combustion performance.

  In addition, as a prior art which employs a plywood as a plate material for a kite, Patent Literature 1 is disclosed in addition to the above-described plywood kite (flash kite).

Japanese Patent Application Laid-Open No. 2003-190231 (A sculpture of a sculptured pattern on a lumbar core plywood)

  By the way, recently, various proposals and measures for effectively using domestic wood resources have been proposed. Various processing machines (cutting machines, press machines, polishing machines, etc.) that produce high-quality plywood using thinned wood and bentwood, which were rarely used in the past, have been developed. Yes. In particular, thick (8 mm to 30 mm thick) plywood for building materials has a large production volume, and expansion of applications is desired.

Under such circumstances, the present inventors have paid attention to the use of such thick plywood for building materials as the plate material of the fence. If wood is made from plywood made from thinned wood in local forests and used in local funerals, it will be useful for so-called local production for local consumption.
However, when a thick plywood is used as the plate material for the firewood, sufficient strength can be obtained even if it is used alone, but sufficient combustion performance cannot be obtained due to the thickness of the plywood. Therefore, as it is, it is not suitable for the plate material of the kite.

  In order to solve such a problem, the present inventors applied a unique processing to a thick plywood, and used this to produce a cocoon prototype. Then, repeated improvements were made while conducting a combustion test in an actual crematorium, leading to the development of a plywood smelter with burning performance comparable to that of a conventional plywood smelter (flash slag).

  The newly developed plywood iron not only has excellent combustion performance, but also has a unique decorative effect not seen in the past. In other words, in the plywood iron making according to the present invention, it has become possible not only to improve the combustion performance but also to obtain a new effect such as enhancing the decorativeness of the appearance by applying unique processing to the thick plywood.

The object of the present invention is to provide a plywood smelter that maintains good combustion performance during cremation, and has a decorative appearance and a high-quality appearance, even if thick plywood is used as the slab plate material. It is to provide.

[First invention]
The plywood iron making of the present invention for solving the above problems is
The bottom plate,
A pair of side plates raised to the left and right of the bottom plate;
A pair of end plates raised before and after the bottom plate;
Comprising a side plate and a top plate provided above the end plate,
At least one of the bottom plate, the side plate, the end plate and the top plate is a plywood slab formed of a plate material made of plywood having a thickness of 8 mm to 30 mm,
The plate material is
A plate wall of the plywood formed by stacking and pressing a plurality of single plates through an adhesive so that their fiber directions are different from each other;
A decorative groove formed by cutting at a depth of 1/2 to 4/5 of the thickness of the plywood on the plate wall surface on either the inner side or the outer side of the plate wall;
Two or more laminated surfaces of the plurality of single plates appearing in the groove of the decorative groove,
It was set as the structure provided with.

  According to the plywood stencil of the present invention, a decorative groove is provided in a plate material made of thick (8-30 mm thick) plywood at a depth of 1/2 to 4/5 of the plate thickness. Becomes extremely thin, and the contact area of the combustion gas increases. At the time of cremation, the decorative groove portion of the plate material is first burned out, and the combustion gas spreads from this burnt hole to the entire firewood. Thereby, the combustion performance of soot can be made favorable.

  Furthermore, according to the plywood iron plate of the present invention, two or more layers of laminated layers of single plywood appear in the decorative groove of the plate material. Since this laminated surface continues in a layered pattern along the entire pattern of the decorative groove and the outline of the pattern, the decorative groove has a more three-dimensional appearance. Thereby, it is possible to enhance the decorativeness of the bag and finish it with a high-class appearance.

In the present invention, the thickness of the plywood is set to 8 mm or more because the thickness of the plywood may be insufficient if the thickness is too small. The thickness is set to 30 mm or less if the thickness is too large. This is because the weight of the bag may increase and handling such as transportation and installation may be deteriorated. Desirably, the thickness of the plywood is set to 10 to 15 mm, more desirably about 12 mm.
The depth of the decorative groove was set to 1/2 or more of the thickness of the plywood because if the decorative groove was too shallow, sufficient combustion performance could not be obtained, and the thickness was set to 4/5 or less of the thickness of the plywood. This is because if the decorative groove is too deep, the durability of the bag may be impaired. Desirably, the depth of the decorative groove is set to 1/3 to 4/5, more preferably about 3/4 of the thickness of the plywood.
About these set values, it can adjust suitably with the hardness of the timber used as the material of a plywood, the thickness of a single board, the number of layers, etc.

[Second invention]
A plywood stencil of the second invention is a sword having the configuration of the first invention, wherein the laminated surface of the plurality of single plates has a groove width of the decorative groove from the groove bottom of the decorative groove toward the groove opening. It was set as the structure which inclines in the direction which expands.

That is, in the second invention, the cross section of the decorative groove is formed so as to expand outward in a mortar shape.
According to such a configuration, when the outer appearance of the bag is viewed, the range in which the laminated surface in the decorative groove can be seen is expanded. For example, even when the decorative groove is viewed from directly above or when the decorative groove is viewed from a position shifted from directly above, the laminated surface in the groove can be viewed. Thereby, the presence of the laminated surface of the decorative groove can be emphasized, and the decorative effect of the bag can be further enhanced.

[Third invention]
The plywood stencil of the third invention is a sword having the configuration of the first invention or the second invention, and an adhesive that is pressure-bonded between the plurality of single plates is colored in a color distinguishable from the plurality of single plates. The configuration is as follows.

According to such a configuration, the single plate layer and the colored adhesive layer appear alternately on the laminated surface of the decorative groove. For this reason, a lamination | stacking surface becomes a finer striped pattern, can improve the decoration effect of a decoration groove | channel, and can make the finish of the external appearance of a ridge even better.
In the third invention, the color of the adhesive is desirably selected according to the color of the single plate. For example, when the color of a single plate is light, it is advisable to use a dark color adhesive such as black or dark blue. Conversely, when the color of a single plate is dark, white or yellow It is recommended to use a light-colored adhesive such as

[Inventions 1-3]
In the first to third inventions, the decorative groove according to the present invention may be limited to any one of the bottom plate, the side plate, the end plate, and the top plate. It is also possible to mix a plate material with a decorative groove according to the present invention and a plate material having a conventional flash structure.

  Although it is desirable to apply the cocoon of the present invention to a rectangular cocoon often used as a Japanese cocoon, the shape is not particularly limited. For example, the present invention may also be applied to a ridge having a rectangular shape with chamfered corners (a planar octagonal ridge).

The use of the plywood iron making of the present invention is not limited to human use, and may be for pets. There is no particular limitation on the accommodation method such as sleeping robes and sitting down.
In addition, it is of course possible to apply other inventions described in this specification to the first to third inventions.

It is a disassembled perspective view which shows the plywood iron making by 1st Embodiment of this invention. It is a top view which shows the same plywood iron making. It is a side view which shows the same plywood iron making. It is the IV-IV sectional view taken on the line shown in FIG. It is the VV line end view shown in FIG. (A) is a schematic cross-sectional view of the portion X shown in FIG. 5, and (B) is a schematic cross-sectional view further enlarging the laminated structure shown in FIG. (A) is a schematic cross-sectional view of a Y portion shown in FIG. 5, and (B) is a schematic cross-sectional view further enlarging the laminated structure shown in FIG. It is a disassembled perspective view which shows the plywood iron making by 2nd Embodiment of this invention. It shows the same plywood iron making and is an end view corresponding to FIG. It is a perspective view which shows the coffin main body of the plywood iron making by 3rd Embodiment of this invention. The modification of embodiment of this invention is shown, (A) is a side view which shows the plywood iron making which has a decorative groove | channel of a lattice pattern, (B) has a concentric pattern decorative groove. FIG. 6 is an exploded end view corresponding to FIG. 5, showing a plywood iron making according to a conventional form.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below and modifications thereof are examples of forms to which the present invention is applied, and the scope of the invention is not limited to these embodiments.

[First Embodiment]
The plywood iron making of the first embodiment is shown in FIGS.
As shown in FIG. 1, a cage 10 is a rectangular cage obtained by applying the present invention, and a lid 13 is placed above a box-like cage body 12. A small door 14 is provided at the front side of the lid 13.
The collar 10 is provided with a decorative groove H1 having a mesh pattern and a decorative groove H2 having a long hole pattern (see FIG. 4). As will be described later, these decorative grooves H1 and H2 are formed in a plate material made of plywood constituting the flange 10.
The dimensions of the heel 10 are, for example, about 170 to 200 cm in the front and back length, about 50 to 70 cm in the lateral width, and about 40 to 50 cm in height including the heel body 12 and the lid 13.

  The bag main body 12 includes a bottom plate 12A, side plates 12B and 12B, and end plates 12C and 12C. Side plates 12B and 12B are raised to the left and right of the rectangular bottom plate 12A, and the end plates 12C and 12C are raised before and after the bottom plate 12A. These plate materials are assembled in a box shape and fixed with a nail or an adhesive.

  The lid 13 includes a rectangular top plate 13A, and a small window 14 is attached to the top plate 13A. Lid side plates 13B and 13B are provided on the left and right of the top plate 13A, and lid end plates 13C and 13C are provided on the front and rear sides, respectively. The lower side of the lid side plate 13B and the lid gutter plate 13C is placed on the side plates 12B, 12B and the upper end of the gutter plates 12C, 12C so as to be exactly aligned with each other, so that the gutter body 12 and the lid 13 have a rectangular external appearance (see FIG. 2 and FIG. 3).

 The main part of the heel 10, that is, the bottom plate 12A, the side plates 12B, 12B, the end plates 12C, 12C of the main body 12, and the top plate 13A, the cover side plates 13B, 13B, the cover end plates 13C, 13C of the lid 13 are made of plywood. Formed by a plate material. This board is obtained by cutting a plywood made from domestic thinned wood (such as firewood, cedar, etc.) to the size of firewood 10. The thickness of the plywood is 8 to 30 mm, desirably about 12 mm.

As shown in FIG. 5, inner frames 12D are provided at the upper and lower ends of the side plates 12B and 12B and the end plates 12C and 12C. These inner frames 12D are formed of plywood having the same thickness as the above-described plywood.
Thus, by providing the inner frame 12D at the ends of the side plates 12B, 12B and the end plates 12C, 12C, the plate surface is reinforced and the durability of the flange 10 is improved. Moreover, since the upper end (opening end) of the ridge body 12 is as thick as two plywood sheets, a profound feeling is brought about in the appearance of the ridge 10.
Such a structure is also used for the lid side plates 13B and 13B and the lid end plates 13C and 13C of the lid 13.

Next, the board | plate material which forms the main part of the collar 10 is demonstrated.
FIG. 6 shows a schematic cross section of a side plate 12B having a mesh-shaped decorative groove H1, and FIG. 7 shows a schematic cross section of a bottom plate 12A having a long hole-shaped decorative groove H2. 6 shows a schematic cross section of the side plate 12B, the schematic cross sections of the end plate 12C and the top plate 13A are substantially the same.
As shown in FIGS. 6 and 7, the plate walls G1 and G2 of these plate materials are made of plywood having seven single plate layers, and adhesives are used so that the fiber directions of the single plates are staggered by 90 °. It is formed by being thermocompression-bonded by overlapping via. Since the single fiber layer t in the longitudinal direction and the single fiber layer s in the horizontal direction are overlapped so as to cross each other, the cross section has a laminated structure (seven layer structure) by the single plate layers s and t.

As shown in FIG. 6, a decorative groove H1 is formed by cutting on the plate wall surface on the outer side of the plate wall G1 (outside of the side plate 12B). In the decorative groove H1, parallel grooves having a groove width of about 1 to 2 cm, for example, cross obliquely with a substantially constant interval (see FIGS. 1 and 3). The uncut plate wall surface of the plate wall G1 remains in the mesh portion.
On the other hand, as shown in FIG. 7, a decorative groove H2 is formed by cutting on the plate wall surface on the inner side of the plate wall G2 (the upper side of the bottom plate 12A). In the decorative groove H2, for example, an ellipse having a groove width of 2 to 4 cm and a length of about 7 to 10 cm is arranged at regular intervals in the front, rear, left, and right, and a portion surrounded by the oval is cut away (FIG. 4). reference). In the middle part in the front-rear direction of the bottom plate 12A, the decorative groove H2 is not formed to ensure the strength of the plate wall G2, and the original plate wall surface remains as it is.

  The depth of the decorative grooves H1 and H2 is set to be substantially constant, and is set to about 3/4 of the thickness of the plate material (plywood). For example, when the thickness of the plate material is 12 mm, the groove bottom surfaces M of the decorative grooves H1 and H2 are formed at a depth of 9 mm from the plate wall surface. Therefore, the thickness of the decorative grooves H1 and H2 in the thickness of the plate material is reduced to about 3 mm.

  An NC router is used for cutting the decorative grooves H1 and H2. Pattern data serving as a base of a mesh pattern or an oval pattern is created in advance, and the NC grooves are controlled based on this data, whereby the decorative grooves H1 and H2 can be accurately cut.

  In the grooves of the decorative grooves H1 and H2, a laminated surface L by the single plate layers s and t appears. In the present embodiment, among the seven single plate layers forming the plywood, the end single plate layer to the fifth layer appear on the laminated surface L. Since the single fiber layer t in the longitudinal direction and the single sheet layer s in the horizontal direction have different textures, the color of each layer on the laminated surface L looks different.

As shown in FIG. 7, in the decorative groove H2, the laminated surface L rises substantially perpendicularly from the groove bottom surface M to the substantially plate wall surface. For this reason, the laminated surface L may be invisible from the viewpoint from directly above the decorative groove H2.
On the other hand, as shown in FIG. 6, the lamination surface L of the decorative groove H1 has a different slope between the lower layer surface Lb and the upper layer surface La. The lower layer surface Lb rises almost vertically from the groove bottom surface M, and the upper layer surface La is inclined in the direction in which the groove width increases from the groove bottom toward the groove opening. That is, the decorative groove H1 has a cross-sectional shape that expands in a mortar shape from the lower layer surface Lb to the upper layer surface La. Thereby, the laminated surface L can be seen with certainty from a viewpoint from directly above the decorative groove H1.

  As for the adhesive to be pressure-bonded between the single plate layers s and t, the single plate layers s and t are both light-colored colors, whereas the color of the adhesive is colored dark-colored. The adhesive layer u appears to be linearly connected to the boundary between the single plate layers s and t. In the present embodiment, the adhesive layer u appears as four striped patterns at the boundary between the five single plate layers. Thus, a three-dimensional effect can be given by the laminated surface L by increasing the contrast of the laminated pattern.

  In addition, when cutting the decorative grooves H1 and H2, it is desirable to set the depth of the grooves in advance so that the adhesive layer u does not remain on the groove bottom surface M. By doing so, the color of the groove bottom surface M is unified to the color of a single plate, and the appearance of wood is not impaired. In addition, since the work of removing the dirt of the adhesive remaining on the groove bottom surface M at the product finishing stage can be omitted, it is useful for reducing the production cost.

  As described above, according to the scissors 10, since the decorative grooves H1 and H2 are provided in the plate material of the main parts of the scissors main body 12 and the lid 13 at a depth of about 3/4 of the thickness, As the thickness becomes extremely thin, the contact area of the combustion gas increases. At the time of cremation, the decorative groove portion is burned out first, and the combustion gas spreads from the burnt hole to the entire soot, so that the combustion performance of the soot 10 can be improved.

燃焼試験には、１２ｍｍ厚の桧合板からなる板材により製作した２種の試作品を使用した。試作品の前後の妻板の外側面に装飾溝を形成したものを実施例とした。装飾溝の深さは、板材（合板）の厚みの３／４程度の深さに設定した。板材（合板）に装飾溝を形成しなかったものを比較例とした。
燃焼試験は、実際に稼働している火葬場のペット用炉を用いて行った。このペット用炉は、一般的な火葬炉と同様に棺の頭部側（一方の妻板側）から燃焼ガスを吹き込む方式のもので、小窓から炉内を覗けるようになっている。
台車に載せた試作品に所定重量の動物の死骸を投入し、炉内に試作品を入れた。バーナーを点火した後、５分ごとに炉内温度を計測しつつ、炉内を目視で観察した。 Here, Table 1 and Table 2 show the results of the combustion test of the plywood iron making according to the present invention.

In the combustion test, two types of prototypes made of a plate material made of 12 mm thick laminated board were used. An example in which decorative grooves were formed on the outer side surfaces of the front and back panels of the prototype was used as an example. The depth of the decorative groove was set to a depth of about 3/4 of the thickness of the plate material (plywood). What did not form a decoration groove in board material (plywood) was made into the comparative example.
The combustion test was conducted using a pet furnace in a crematorium that is actually in operation. This pet furnace is a type in which combustion gas is blown from the head side of the coffin (one side of the face plate) like a general cremation furnace, so that the inside of the furnace can be seen through a small window.
An animal carcass of a predetermined weight was put into the prototype placed on the carriage, and the prototype was placed in the furnace. After igniting the burner, the inside of the furnace was visually observed while measuring the furnace temperature every 5 minutes.

As shown in Table 1, in the prototype of the comparative example, the rise in the furnace temperature after ignition was fast, and reached a maximum temperature exceeding 900 ° C. after 15 minutes. It took about 6 minutes for the hole on the wall of the twill plate to open, and a backfire phenomenon (a phenomenon in which a flame flows backward from the inspection port) occurred immediately after the hole was made.
On the other hand, as shown in Table 2, in the prototype of the example, the rise of the furnace temperature after ignition was suppressed, and the subsequent temperature increase was also suppressed to a temperature lower than that of the comparative example. It started to burn from the decorative groove part of the end plate, and it took about 2 minutes and 30 seconds until the hole was made in the wall surface of the end plate, and no backfire phenomenon occurred.
When incinerating a conventional plywood slag (flash slag) in a similar furnace, it takes about 1 to 3 minutes until a hole is made in the wall surface of the end plate, so the prototype of the example is a conventional plywood It has been found that the combustion performance is comparable to that of flash iron.

Thus, according to the scissors 10 of the present embodiment, the decorative grooves H1 and H2 are applied to the plate material forming the main portion, so that the decorative groove portion has a plate thickness that is easy to burn and enhances the flammability of the plate material. Can do. As a result, it is possible to realize a soot having a level of combustion performance comparable to that of a thick (8 mm to 30 mm thick) plywood or a conventional plywood soot (flash soot).
Moreover, although the thick plywood is adopted in the scissors 10 of this embodiment, the weight of the scissors 10 can be reduced by providing the decorative grooves H1 and H2 over a wide area of the plate material, and operations such as installation and transportation are performed. It can be made easier.
As a result, it contributes to the expansion of the use of thick plywood as a board material for plywood making, and can be used for effective utilization of wood resources.

Furthermore, according to the scissors 10 of the present embodiment, a laminated surface L including a single plate layer and an adhesive layer of plywood appears in the decorative grooves H1 and H2. The laminated surface L is formed in a striped pattern so as to border the contours of the mesh-shaped decorative groove H1 and the long-hole-shaped decorative groove H2, so that the decorative grooves H1 and H2 have a more three-dimensional appearance. .
In particular, the laminated surface L of the decorative groove H1 has a cross-sectional shape that spreads in a mortar shape from the lower layer surface Lb to the upper layer surface La, so that it can be seen in a wide range from the periphery of the basket 10. As a result, it is possible to finish the bag 10 with a unique appearance and a high-class feel.

[Second Embodiment]
Next, the plywood iron making according to the second embodiment is shown in FIGS.
The decoration on the bag may be applied not only to the outer side of the bag but also to the inner side of the bag. In the second embodiment, the decorative grooves H1 and H2 are formed on the inner side of the bag, contrary to the first embodiment, in order to meet such a demand.
As shown in FIG. 8, the plywood iron plate 20 is formed with a slotted decorative groove H <b> 2 on the inner side of the bottom plate 12 </ b> A and the side plates 12 </ b> B and 12 </ b> B. A mesh-shaped decorative groove H1 is formed on the inner side of the flange 12C. As shown in FIG. 9, a mesh-shaped decorative groove H1 is also formed inside the top plate 13A.
These decorative grooves H1 and H2 are formed by cutting a thick (8-30 mm thick) plywood plate similar to that of the first embodiment. The groove widths and depths of the decorative grooves H1 and H2 are the same as those in the first embodiment.

Also by the scissors 20 of the second embodiment, the decorative grooves H1 and H2 are provided on the plate material forming the main portion, so that the decorative groove portions can be easily burned and the combustibility can be improved.
Moreover, since the weight of the bag 20 is reduced, handling of the bag, such as transportation and installation, can be easily performed as in the first embodiment.
Furthermore, since the decorative grooves H1 and H2 are provided on the inner side of the bag, these decorations can be casually shown to the attendees when the lid 13 is opened.
The exterior appearance of the kite can be made simple by applying decorations such as a wood grain pattern in the same way as a conventional plywood kite (flash kite).

[Third Embodiment]
Next, the plywood iron plate 30 of 3rd Embodiment was shown in FIG.
The heel 30 of the third embodiment is such that the side plates 12B, 12B and the end plates 12C, 12C of the heel body 12 are provided with a decorative pattern (Saaya-shaped) decorative groove H3. Decorative grooves H3 are formed on the outer sides of these plate materials by cutting.
A collapsible pattern (Saaya shape) is drawn by connecting the ridge figures with sloping straight lines. As in the first embodiment, basic pattern data is created in advance, and the decorative groove H3 can be precisely cut by controlling the NC router based on this data.

  A laminated surface L similar to the mesh-shaped decorative groove H1 described above appears in the groove of the decorative groove H3 (see FIG. 6). The laminated surface L also has a cross-sectional shape that spreads in a mortar shape from the lower layer surface Lb to the upper layer surface La.

  In 3rd Embodiment, the outer frame 12E is provided toward the lower end outer side of the collar main body 12. As shown in FIG. The outer frame 12E brings a Western-style stability to the appearance of the bag 30, and emphasizes its appearance. Metal brackets 12 </ b> F are attached to the four corners of the outer frame plate 12 </ b> E to provide a decorative accent.

According to the kite 30 of the third embodiment, by crushing the plate material forming the main portion with the decorative groove H3 having a pattern, the decorative groove portion has a plate thickness that is easy to burn and enhances the flammability of the plate material. Can do.
Moreover, since the weight of the bag 30 is reduced, handling of the bag, such as transportation and installation, can be easily performed as in the first embodiment.
Furthermore, since the laminated surface L of the plywood appears in the decorative groove H3 of the collapsed pattern, the appearance of the collar 30 has a texture like a three-dimensional sculpture. Thereby, it is possible to finish the bag 30 with a unique appearance and a high-class feeling.

[Modification]
As mentioned above, although the bag by embodiment of this invention was demonstrated, embodiment of this invention may be accompanied by various deformation | transformation and a change, without being limited to these structures.
The plywood used as the board is preferably made from thinned wood such as Japanese oak and cedar, but of course imported wood may also be used. The number of layers of the single plate in the plywood may be any as long as the laminated surface appears in the decorative groove.
In the above-described embodiment, the single plate layers s and t are light-colored colors and the adhesive layer u is dark-colored colors. However, these relationships may be reversed. The single plate layer s and the single plate layer t can also be made a light color and a dark color, respectively. Furthermore, it is also possible to sandwich a colored paper material such as red or green between the veneer layers so that the laminated surface can be seen.
The form of the decorative grooves H1 to H3 can be appropriately changed within a range not impairing the combustion performance of the present invention.
For example, as shown in FIG. 11 (A), a decorative groove H4 having a lattice pattern in which vertical and horizontal grooves intersect each other may be used. As shown in FIG. 11 (B), concentric grooves are arranged at equal intervals. A circular decorative groove H5 can also be formed. In addition, it may be a linear pattern in which spirals and wavy lines are drawn.
When such a linear pattern is adopted, the combustion gas easily flows in the length direction of the decorative groove, so that the effect of improving the combustion performance of the plywood iron can be expected.
In the above-described embodiment, the decorative groove is provided on the bottom plate, the side plate, the end plate, and the top plate, but it is of course possible to provide the decorative groove on the plate material of the small window.

10. ・ 棺 (plywood making)
12 ··· Body 12A ··· Bottom plate 12B · · Side plate 12C · · Tail plate 12D · · Inner frame 12E · · Outer frame 12F · · Bracket 13 · · lid 13A · · top plate 13B · · lid side plate 13C · · lid plate H1 to H5 .. Decorative grooves G1, G2, .. Plate wall L .. Laminated surface La .. Upper layer surface Lb .. Lower layer surface M .. Groove bottom surface s, t ... Single plate layer u ... Adhesive layer

Claims (2)

The bottom plate,
A pair of side plates raised to the left and right of the bottom plate;
A pair of end plates raised before and after the bottom plate;
Comprising a side plate and a top plate provided above the end plate,
At least one of the bottom plate, the side plate, the end plate and the top plate is a plywood slab formed of a plate material made of plywood having a thickness of 8 mm to 30 mm,
The plate material is
A plate wall of the plywood formed by stacking and pressing a plurality of single plates through an adhesive so that their fiber directions are different from each other;
A decorative groove formed by cutting at a depth of 1/2 to 4/5 of the thickness of the plywood on the plate wall surface on either the inner side or the outer side of the plate wall;
Two or more laminated surfaces of the plurality of single plates appearing in the groove of the decorative groove,
Equipped with a,
The plywood iron making machine , wherein an adhesive that is pressure-bonded between the plurality of single plates is colored in a color that can be distinguished from the plurality of single plates .   2. The plywood steel plate according to claim 1, wherein a laminated surface of the plurality of single plates is inclined in a direction in which a groove width of the decorative groove increases from a groove bottom portion of the decorative groove toward a groove opening portion. .

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