JP2005254591A - Heat insulating material using timber waste, and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating material using timber waste, which can reduce the disposal cost of the limber waste and save forest resources, by constructing the heat insulating material through the use of most of the timber waste produced when square timber is manufactured by longitudinally cutting the outer periphery of a log, and a manufacturing method for the heat insulating material. <P>SOLUTION: This heat insulating material 4 is made by accommodating a first timber waste layer H1 formed by planarly arranging a plurality of pieces of timber waste H produced when the square timber is made by longitudinally cutting the outer periphery of the log and arranged in a line with the face side HF upward and a second timber waste layer H2 formed by planarly arranging a plurality of pieces of timber waste H in a line with superposing the face side of the timber waste HF on the face side of the timber waste of the layer H1 on a top surface between the adjacent pieces of timber waste H of the layer H1, in an internal space between linear splints of the timber waste HS arranged along the two sides of a gap formed between rafters 5; Both sides of the superposed face sides HF are sequentially joined in a width direction by nailing so that the layers H1 and H2 can be integrated together along with both the splints of the timber waste HS, and a square with a specified length is formed by cutting both longitudinal ends. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat insulating material attached to a partition part that partitions the outside of a building, and particularly relates to a heat insulating material using a lumber edge material and a manufacturing method thereof.

  As a structure of a building, a wooden structure is known in which a work structure is improved by attaching a heat insulating material to a roof, a floor, or the like in a frame structure that is a conventional construction method. The heat insulating material used for such a wooden building is provided in a frame of a partition part that partitions the outside of the building, a face material attached to both sides of the frame, and an inside partitioned by the frame and the face material. In addition to being excellent in heat insulation, it is used as a structural surface material to improve the strength of the building.

  However, in the said heat insulating material, many edge materials which are a piece of frame material and a face material generate | occur | produce in the manufacturing process. For example, in the case of a frame material, a material of a specified size is cut from a standard material, so that the yield of the material is poor, and not only is the cost for disposing of the offcuts, but also waste of forest resources is caused. There was a problem such as.

  Therefore, as a solution to these problems, there has been proposed a heat insulating material that reduces the yield and reduces the cost of scrap disposal (see Patent Document 1).

  Such a heat insulating material is provided in the interior partitioned by the frame and the face material by attaching the face material to both sides of the frame assembled by arranging the upper and lower horizontal frames and the left and right vertical frames made of a frame in a square shape. It has been. And at least one frame material of the above-mentioned frame has end materials connected by connecting means, and the end materials used when cutting the frame material to a predetermined dimension are used. The end material which is a piece of the board material (for example, plywood) is used.

Japanese Patent Laid-Open No. 2000-220251 (paragraphs 0009 to 0011, FIG. 1)

  However, the above-mentioned heat insulating material uses an end material that is produced when the frame material is cut into a predetermined size or an end material that uses a piece of a plate material (for example, plywood). This is made of wood, and the outer circumference is cut in the longitudinal direction when making lumber from pillars, beams, etc., which make up the frame structure of a wooden building, as well as the end material generated during the manufacture of the frame of the heat insulating material. The resulting wood scrap with wood bark is discarded through contractors due to the presence of pests inside the bark and easily perishes. It had a problem that caused waste.

  The present invention has been made paying attention to such problems, and constructs a heat insulating material using most of the end material generated when sawwood is cut by cutting the outer periphery of the raw wood in the longitudinal direction. Thus, it is an object of the present invention to provide a heat insulating material using a lumber mill material and a method for producing the same, which can reduce the waste disposal cost and reduce the forest resources.

In order to solve the above-mentioned object, the heat insulating material using the lumber mill ends according to claim 1 of the present invention is a heat insulating material 4 attached to a partition portion that partitions the outside of the building 1, and the heat insulating material. 4 is an arrangement in which linear splint ends HS are arranged along both sides of a gap formed between the rafters 5 or joists 15 constituting the partition portion, and the internal space between the splint ends HS Further, a first end material layer H1 formed by arranging a plurality of end materials H generated when the outer periphery of the raw wood 18 is cut in the longitudinal direction to form the square material S in a plane with the wood surface HF facing up. And a second end material layer H2 formed by arranging and arranging two sides of the surface HF of the plurality of end materials H on the upper surface between the adjacent end materials H of the first end material layer H1 in a plane. The first and second end material layers H1 and H2 are bonded to each other in the width direction by nailing in sequence with the nails. Integrated with splints scrap HS, a heat insulating material using the lumber end material characterized by comprising formed into a square of the length of the defined by cleavage of the longitudinal ends.
According to the heat insulating material using the lumber edge material, the inside between the linear splint edge materials HS arranged along both sides of the gap formed between the rafters 5 or the joists 15 constituting the partition portion. In the space, the first end material layer H1 is arranged in a plane with a plurality of end materials H produced on cutting the outer periphery of the raw wood 18 in the longitudinal direction to form a square material S with the tree surfaces HF on top. The second end material layer H2 is formed by arranging and arranging the two end surfaces H of the plurality of end materials H on the upper surface between the adjacent end materials H of the first end material layer H1 in a planar manner. The first and second end material layers H1 and H2 are integrated together with the two splint wood end materials HS by joining both sides of the formed wood surfaces HF in the width direction sequentially by nailing, so that both ends in the longitudinal direction are integrated. Is formed into a square having a predetermined length.

In the heat insulating material using the lumber edge material according to claim 2 of the present invention, the third edge material layer H3 is formed on the upper surface of the second edge material layer H2 accommodated in the internal space of the bifurcated edge material HS. The third end material layer H3 is laminated and accommodated, and the wood end HR surfaces of the plurality of end materials H are overlapped on the tree back HR surface between the adjacent end materials H of the second end material layer H2. The first, second, and third end material layers H1, H2, and H3 are formed by arranging the two sides of the overlapped tree backs HR sequentially in the width direction by nailing. It is a heat insulating material using a lumber mill end material integrated with the splint mill end mill HS.
According to the heat insulating material using the above-mentioned lumber mill ends, a plurality of mill ends H on both sides are overlapped on a plane HR surface between the adjacent end sections H of the second end mill layer H2 in a planar shape. The third end material layer H3 is arranged in a row, and the first, second, and third end material layers H1, H2, are joined by sequentially nailing both sides of the overlapped tree back HR to each other in the width direction. H3 is integrally formed with both splint ends.

In the heat insulating material using the lumber edge material according to claim 3 of the present invention, the upper surface of the second edge material layer H2 covers the upper surface of the second edge material layer H2 together with the bifurcated edge material HS. In this way, the heat insulating material is made of a lumber edge material in which the kraft paper 26 is attached by nailing.
According to the heat insulating material using the above lumber mill ends, the kraft paper 26 is provided on the entire upper surface of the second mill end layer H2 so as to cover the upper surface of the second mill end layer H2 together with the both splint mill ends HS. The kraft paper 26 can also be interposed between the second end material layer H2 and the third end material layer H3.

  The manufacturing method of the heat insulating material using the lumber edge material of Claim 4 of this invention is a manufacturing method of the heat insulating material 4 attached to the partition part which partitions the exterior of the building 1, Comprising: The said partition part is comprised. A conveying table 20 having a predetermined length having a pair of parallel guides 22a and 22b set to a predetermined width corresponding to a gap X ′ formed between the rafters 5 or the joists 15 and the like, and conveying the conveying table 20 And a cutting table 24 disposed on the road, and a carrier base 20 formed between the two splint ends HS by arranging a straight splint end HS along the inside of both guides 22a and 22b. A plurality of end materials H generated when the outer periphery of the raw wood 18 is cut in the longitudinal direction to form the square material S in the upper internal space are arranged in a plane with the wood table HF facing upward, and the first end material A layer H1 is formed, and the plurality of end materials H are formed on the upper surface between the adjacent end materials H of the first end material layer H1. The second end material layer H2 is formed by arranging the two sides of the front HF so as to be arranged in a plane, and both sides of the stacked wood fronts HF are sequentially joined in the width direction by nailing, so that the first and second The two end material layers H1 and H2 are integrally formed with the both splint end materials HS so that the upper surface of the second end material layer H2 covers the upper surface of the second end material layer H2 together with the both splint end materials HS. A craft paper end material is used, in which a kraft paper 26 is attached by nailing and then moved by a predetermined amount by a conveying table 20 to form both ends in a longitudinal direction into a square having a specified length by cutting with the cutting device 24. The manufacturing method of the heat insulating material which was.

  The present invention has the following effects.

  According to the first aspect of the present invention, a plurality of end materials generated when the outer periphery of the raw wood is cut in the longitudinal direction to produce a square bar are arranged in a line between linear splints arranged at a predetermined width. Then, they are alternately stacked and joined together by nailing and integrated together with both splint mill ends, and by cutting at both ends in the longitudinal direction, they are formed into a rectangular shape with a specified length, thereby reducing waste disposal costs and reducing forest resources. You can save money.

  According to invention of Claim 2, in addition to a 2nd end material layer in the internal space of both splint wood end materials, a 3rd end material layer is laminated | stacked and accommodated, and the heat insulating material with a higher heat insulation effect is comprised. be able to.

  According to the invention described in claim 3, by applying the moisture-proof kraft paper on the upper surface or the middle of the heat insulating material, the moisture insulating property is increased together with the heat retaining property of the heat insulating material, and moisture intrusion is prevented. Condensation can be prevented from occurring.

  According to the fourth aspect of the present invention, by using the transport table as a work table, both sides of the end materials arranged in a row alternately in the vertical direction are sequentially joined in the width direction by nailing. In addition, the second end material layer is integrally formed with both splint wood end materials, and the heat insulating material formed integrally is cut at both ends in the longitudinal direction by a cutting device in accordance with the amount of movement on the conveyance table, thereby heat insulation having a specified length. A material is formed, and square-shaped heat insulating materials of various sizes can be efficiently manufactured together with gaps formed between rafters or joists.

  Examples of the present invention will be described below.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a heat insulating material using the lumber edge material in the first embodiment of the present invention, and this heat insulating material is used for a roof and an outer wall of a wooden building. Explanatory drawing, FIG. 2 is the heat insulating material using the lumber edge material in Example 1 of this invention, Comprising: This thermal insulating material is used for the floor surface of a wooden building, (a), (b) of FIG. ) Is related to Example 2 of the present invention, and is an explanatory view of square lumber and lumber cut in the longitudinal direction by cutting the outer periphery of the raw wood in the longitudinal direction, FIG. 4 is from the raw wood cut in the longitudinal direction, respectively FIG. 5 is an explanatory view showing the relationship with the end material formed by cutting the outer circumference in the longitudinal direction when making a square from a raw wood, and FIGS. 6A to 6C are square wood from the raw wood. Explanatory drawing showing the process of sawing further plate material from the end material that was sometimes cut, FIG. 7 is used when manufacturing heat insulation FIG. 8A is an explanatory diagram of a step of forming the first end material layer by arranging the end materials on the transport table, and FIG. -A cross-sectional view, FIG. 9A is an explanatory view of a process of forming end material on the transport table and forming a second end material layer on the upper surface of the first end material layer, and FIG. FIG. 10 is an explanatory view of a step of forming a square having a predetermined dimension from a plurality of end materials constituting the first end material layer and the second end material layer, and FIG. 11 is a diagram of the second end material layer. FIG. 12 is an explanatory diagram of a process of applying kraft paper on the upper surface, FIG. 12 is an explanatory diagram of a process of applying kraft paper to the entire upper surface of the second end material layer and then cutting it to a predetermined length, and FIG. FIG. 5 is an explanatory diagram of a state in which a heat insulating material made of a second end material layer is installed between rafters.

  First, FIG. 1 shows an example in which a heat insulating material constituted by using a lumber edge as Example 1 of the present invention is used for a roof and a wall surface of a wooden building having a frame structure. Reference numeral 1 denotes a wooden building, and a heat insulating material 4 or 8a and 8b are attached to the inside of the roof and the inside of the wall surface as the partitioning part in the frame (structure material) of the building 1, respectively.

  The heat insulating material 4 for the roof is between the plurality of rafters 5 that are diagonally supported between the plurality of main building materials 6, and the heat insulating materials 8 a and 8 b for the wall surface are between the pillars 2 that constitute the shaft assembly, respectively. It is incorporated. Further, a plurality of heat insulating materials 14 are also incorporated in the floor surface shown in FIG. 2, and these heat insulating materials 14 are provided between the joists 15 supported at predetermined intervals on the plurality of large pullings 16 arranged in parallel. For example, the flooring (not shown) is attached, and the flooring 12 is laid on the upper surface of the heat insulating material 14.

  Each of the above-mentioned various heat insulating materials uses the lumber edge material of the present invention, and each has a different structure but basically has the same structure. In this embodiment, the heat insulating material 4 for roof will be described.

  That is, as shown in FIGS. 3 (a) and 3 (b), the heat insulating material 4 is formed from the raw wood 18 when the square wood S such as columns and beams constituting the frame structure of the wooden building is sawn. It is configured in a planar rectangular shape with a predetermined thickness using elongated end materials H of various sizes generated by cutting the outer periphery in the longitudinal direction.

  Specifically, as shown in FIG. 13, the interior between the straight splint ends HS arranged in parallel along both sides of the prescribed gap X ′ formed between the rafters 5 or the joists 15. A first end material layer H1 formed in a plane by arranging a plurality of end materials H on a tree surface HF in a space, and an upper surface between adjacent end materials H of the first end material layer H1 And the second end material layer H2 formed in a plane by alternately arranging and arranging both sides of the wood surface HF of the plurality of edge materials H, and nailing both sides of the overlapped wood surfaces HF The first and second end material layers H1 and H2 are joined together with the splint wood end material HS by joining in the width direction sequentially, and both ends in the longitudinal direction are cut to a specified dimension (for example, 6 scales) to have a specified length. A heat insulating material 4 formed in a square shape is constructed, and craft paper 26 is covered with a nail as needed on the entire upper surface of the second end material layer H2. It is.

  Next, the method for manufacturing the heat insulating material 4 will be described. First, a description will be given of the step of forming the end material. First, as shown in FIG. 3A and FIG. 5, for example, when a square material S such as a pillar or a beam constituting a frame structure of a wooden building is made from a raw wood 18, the outer periphery of the raw wood 18 is cut along parallel lines. After cutting in the longitudinal direction along C1 and C2 to form two parallel surfaces, the square material S is formed by cutting in the longitudinal direction along parallel cutting lines C3 and C4 perpendicular to these two surfaces. . Here, as shown in FIG. 3B, the four end members H generated by the formation of the square member S are referred to as the tree back HR on the side of the annual ring N cut and the tree surface HF on the outside.

  As shown in FIG. 4, square bars S1 or S2 corresponding to the outer shapes of the logs 18a and 18b can be cut out from the large and small logs 18a and 18b, respectively, thereby forming elongated plate-like end materials H having various dimensions. Is done.

  Further, as shown in FIGS. 6A to 6C, among the four end members H generated by the formation of the square member S, the end member H having a large plate thickness is cut in parallel with the tree HR plane. By cutting in the longitudinal direction along the line C5, it can be used as a plate material H ′ for assembling, and the end material H ″ generated thereby can be used as a heat insulating material.

  Next, an end material processing step, which is a first step that is a preparatory work for manufacturing a heat insulating material, will be described with reference to FIG.

  In the first step ST1, a square bar S that becomes a core material of a pillar or a beam is manufactured by cutting the outer periphery of the raw wood 18 in the longitudinal direction along parallel cutting lines C1 to C4 at a sawmill, and the next step In ST2, end materials H of various sizes generated at the time of manufacturing the square member S are collected.

  In the process ST3, the collected scraps H are peeled to make the weeds of the farmer's field, and in the process ST4, the scraps H can be used by drying them naturally for about two weeks. The preparation for manufacturing the heat insulating material is completed (step ST5).

  Next, the manufacturing process of the heat insulating material using the lumber mill ends will be sequentially described with reference to FIGS.

  First, as shown in FIGS. 8A and 8B, for example, a roller conveyor 20 is prepared as a transport table having a function of a work table for assembling the end material H, and this is installed on the work table T. The roller conveyor 20 has frames 22a and 22b having a predetermined length (a length of at least 6 lengths) serving as a pair of parallel guides on both sides, and a plurality of frames 22a and 22b are disposed below the frames 22a and 22b. A roller R is rotatably supported at a predetermined interval.

  The gap inside the frames 22a and 22b of the roller conveyor 20 is set in advance to a predetermined width corresponding to a gap formed between rafters or joists, for example. A horizontally long cutting device 24 is disposed in the gap between the frames 22a and 22b, and is installed so as to be orthogonal to the conveyance path. For example, a scale (not shown) with the cutting device 24 as a reference is provided on the upper surface of one of the frames 22a. Is installed.

  Therefore, a pair of straight splint members HS formed along the inner sides of both frames 22a and 22b of the roller conveyor 20 are disposed, and a plurality of rollers R formed between the splint end members HS are arranged. In the internal space, end materials H of various lengths prepared in advance have gaps over a predetermined length of the roller conveyor 20 (length of 6 or more lengths) with the tree back HR surface facing down and the wood surface facing up. The first end material layer H <b> 1 is formed by arranging and arranging in a planar manner so that there is no occurrence.

  Next, as shown in FIGS. 9A and 9B, between the adjacent end materials H on the upper surface of the first end material layer H1 formed over the roller R of the roller conveyor 20 over a predetermined length. A second end material layer H2 is formed by arranging and arranging the both sides of the wood surface HF of the plurality of end materials H in a flat shape on the upper surface of the material.

  In this way, as shown in FIG. 10 in which the roller conveyor is omitted, the substantially square plate-like heat insulating material 4 is temporarily assembled in a state where the prescribed width X is set by the two splints HS. In this process, both ends of the end material H constituting the first and second end material layers of the heat insulating material 4 are still uneven, and in the final process, as described later, it is cut into a specified length L (for example, 6 scales). The

  Therefore, as shown in FIG. 11, craft paper 26 is covered on the entire upper surface of the second end material layer as necessary, and nails 25 are driven and fixed from the upper surface. The first and second end material layers can be fixed at the same time by this nail driving. However, at the time of this nail driving, both sides of the adjacent wood tables HF alternately stacked as shown in FIG. 13 are nailed. Thus, the first and second end material layers are integrally formed together with both splint wood end materials HS by sequentially joining in the width direction. It is also possible to fix the craft paper 26 placed on the second end material layer H2 by nailing after the first and second end material layers H1, H2 are fixed first as a nail driving procedure.

  When the heat insulating material 4 integrally formed in this way is transferred to the cutting device 24 by the roller conveyor 20, the tip thereof is cut and aligned in the direction perpendicular to the conveyance path at the cutting line C6 as shown in FIG. Furthermore, the cutting device 24 is moved to the position of 6 scales on the basis of the cutting device 24, the rear end is cut along the cutting line C7, and the rectangular heat insulating material 4 is formed.

  Next, as shown in FIG. 13, the completed heat insulating material 4 is fitted into the predetermined gap X ′ between the two rafters 5 and 5, but both outer side surfaces of the splint end material HS constituting the heat insulating material 4 and both the rafters 5. , 5 is sealed by the interposition of both ends 26a, 26b of the kraft paper 26. The gaps may be filled with straw, soil, etc. as necessary.

  Therefore, according to the heat insulating material configured as described above, the plurality of end materials H generated when the square wood S is sawn by cutting the outer periphery of the raw wood 18 in the longitudinal direction are linearly arranged in the specified width X. The two splints HS are arranged side by side, stacked alternately and joined together by nailing, so that they are integrated with both splint ends HS, and both longitudinal ends are cut to a specified length L (for example, 6 scales). By forming it into a square with a length of, it is possible to reduce the waste disposal cost of the millwood H and to save forest resources.

  Further, by attaching moisture-proof kraft paper 26 to the upper surface of the second end material layer H2 of the heat insulating material 4, the heat insulating material 4 can be kept warm and moisture-proof, and moisture can be prevented from entering and condensation can be generated. Can be prevented.

  Next, the heat insulating material having a three-layer structure will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the member which is common in the said Example, and the description is abbreviate | omitted. FIG. 14 is a cross-sectional view of a state in which a heat insulating material having a three-layer structure is installed between rafters according to the third embodiment.

  Reference numeral 28 shown in FIG. 14 indicates a heat insulating material having a three-layer structure, and the heat insulating material 28 is a linear shape disposed in parallel along both sides of the defined gap X ′ formed between the rafters 30. In addition to the first and second end material layers H1 and H2 accommodated in the internal space between the splint end materials HS, a third end material layer H3 is stacked and accommodated on the upper surface of the second end material layer H2.

  That is, the heat insulating material 28 having a three-layer structure is arranged in a plane by alternately overlapping the wood back HR sides of the plurality of end materials H on the wood back HR surface between the adjacent end materials H of the second end material layer H2. The first, second, and third end material layers H1 to H3 are joined to both splint wood ends HS by joining and arranging both sides of the overlapped wood back HR sequentially in the width direction by nailing from both the upper and lower sides. It is integrated into a rectangular shape with a specified length. And this heat insulating material 28 can interpose the kraft paper 26 as needed between the 2nd end material layer H2 and the 3rd end material layer H3.

  As described above, according to the heat insulating material 28 having the three-layer structure, the third end material layer H3 is stacked and accommodated in the internal space of the two splint wood ends HS in addition to the second end material layer H2, thereby further increasing the heat insulating effect. High heat insulating material 28 can be configured.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and the fourth end material layer, the fifth end material layer, and the like can be used. Needless to say, changes and additions within the scope of the present invention are included in the present invention.

It is a heat insulating material using the lumber edge material in Example 1 of this invention, Comprising: It is explanatory drawing which used this heat insulating material for the roof and outer wall of a wooden building. It is a heat insulating material using the lumber edge material in Example 1 of this invention, Comprising: It is explanatory drawing which used this heat insulating material for the floor surface of a wooden building. (A), (b) is related with Example 2 of this invention, and is explanatory drawing of the end material cut | disconnected in the longitudinal direction and the square material cut | disconnected by cutting the outer periphery of a raw wood in a longitudinal direction. It is explanatory drawing from the log cut | disconnected in the longitudinal direction, respectively. It is explanatory drawing which shows the relationship with the end material formed by cut | disconnecting an outer periphery in a longitudinal direction when lumber is manufactured from a raw wood. (A)-(c) is explanatory drawing which shows the process of sawing a board | plate material further from the end material cut | disconnected at the time of lumber cutting from a raw wood. It is explanatory drawing of the process of preparing the end material used when manufacturing a heat insulating material. (A) is explanatory drawing of the process of forming a 1st end material layer by arranging end materials on a conveyance stand, (b) is AA sectional drawing of (a). (A) is explanatory drawing of the process of forming a 2nd end material layer on the upper surface of a 1st end material layer by arranging an end material on a conveyance stand, (b) is BB sectional drawing of (a). is there. It is explanatory drawing of the process formed in the square of a predetermined dimension from the some end material which comprised the 1st end material layer and the 2nd end material layer. It is explanatory drawing of the process of depositing kraft paper on the upper surface of a 2nd end material layer. It is explanatory drawing of the process cut | disconnected to predetermined length, after attaching a kraft paper to the upper surface whole surface of a 2nd end material layer. It is sectional drawing of the state which installed the heat insulating material which consists of a 1st, 2nd end material layer between rafters. It is sectional drawing of the state which installed the heat insulating material of the 3 layer structure which concerns on Example 3 between rafters.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Pillar 4 Thermal insulation material 5 Rafter 6 Purlin 6 Material 8a, 8b Thermal insulation material 12 Flooring 14 Thermal insulation material 15 Neta 16 Large drawing 18 Raw wood 18a, 18b Raw wood 20 Roller conveyor (conveyance stand)
22a, 22b Frame (guide)
24 Cutting device 25 Nail 26 Kraft paper 26a, 26b Kraft paper both ends 28 Heat insulation material 30 Rafter C1-C7 Cutting line H End material H 'Plate material H''End material H1 First end material layer H2 Second end material layer H3 First 3 End material layer HF Wood table HR Wood back HS Barb wood end material N Annual ring R Roller S, S1 Square material T Work table X Specified width X 'Specified gap

Claims (4)

It is a heat insulating material 4 attached to the partition part which partitions the exterior of the building 1,
The heat insulating material 4 is arranged with linear splint ends HS along both sides of a gap formed between the rafters 5 or the joists 15 constituting the partition part, and between the spliced end materials HS. A first end formed by arranging a plurality of end members H generated when the outer periphery of the raw wood 18 is cut in the longitudinal direction to form the square member S in a plane shape with the wood table HF facing up A second end material comprising a material layer H1 and an upper surface between adjacent end materials H of the first end material layer H1, wherein both sides of the surface HF of the plurality of end materials H are overlapped and arranged in a plane. The first and second end material layers H1 and H2 are integrated together with the two splint wood end materials HS by housing the layer H2 and sequentially joining both sides of the stacked wood surfaces HF in the width direction by nailing. A heat insulating material using a lumber edge material characterized by being formed into a square having a specified length by cutting at both ends in the longitudinal direction. A third end material layer H3 is stacked and accommodated on the upper surface of the second end material layer H2 accommodated in the internal space of the both splint wood ends HS, and the third end material layer H3 is formed by the second end material layer H3. The wood back HR surfaces of the wood layers HR between adjacent end materials H of the material layer H2 are arranged in a plane by overlapping both sides of the wood back HR of the plurality of end materials H, and both sides of the wood backs HR stacked. The lumber edge according to claim 1, wherein the first, second and third end material layers H1, H2, H3 are integrated together with the two splint wood ends HS by sequentially joining them in the width direction by nailing. Insulation material using wood. The kraft paper 26 is attached to the entire upper surface of the second end material layer H2 by nailing so as to cover the upper surface of the second end material layer H2 together with the two splint wood end materials HS. A heat insulating material using the lumber mill ends described in 1. It is a manufacturing method of the heat insulating material 4 attached to the partition part which partitions the exterior of the building 1,
A conveying table 20 having a predetermined length having a pair of parallel guides 22a and 22b set to a predetermined width corresponding to a gap X ′ formed between the rafters 5 or the joists 15 constituting the partition part; And a cutting device 24 disposed on the conveyance path of the conveyance table 20, and a linear splint end material HS is disposed along the inner sides of both guides 22a and 22b. A plurality of end materials H generated when the outer periphery of the raw wood 18 is cut in the longitudinal direction to form the square material S in the internal space on the transport table 20 to be formed are arranged side by side in a plane with the wood surface HF facing up. Then, the first end material layer H1 is formed and arranged on the upper surface between the adjacent end materials H of the first end material layer H1 in such a manner that the both sides of the surface HF of the plurality of end materials H are overlapped in a plane. Then, the second end material layer H2 is formed, and both sides of the stacked wood surfaces HF are sequentially joined in the width direction by nailing. The first and second end material layers H1 and H2 are integrally formed together with the bifurcated end material HS, and the upper surface of the second end material layer H2 is formed on the entire upper surface of the second end material layer H2. The kraft paper 26 is attached by nail so as to be covered with HS, and then is moved by a predetermined amount by the transport table 20 so that both ends in the longitudinal direction are formed into a square having a predetermined length by cutting with the cutting device 24. A method of manufacturing a heat insulating material using sawn timber.

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