JP5039812B2 - Wood product, manufacturing method of wood product - Google Patents

Description

  The present invention relates to a wood product and a method for producing a wood product.

  Wood generally deforms over time. The deformation of wood is generally called “Kurui”, and is classified into “bend”, “warp”, and “twist” according to the state of the deformation.

  FIG. 6 is a schematic cross-sectional view of the wood 901. FIG. 7 is a schematic cross-sectional view of a timber 905 obtained from the wood 901. Based on FIG.6 and FIG.7, the deformation | transformation of a timber is demonstrated. Wood 901 generally refers to a trunk portion of a felled tree. Looking at the cross section of the wood 901, the tree heart 902 and a plurality of annual rings 903 can be visually recognized. Further, the outer edge of the cross section of the wood 901 is surrounded by the bark 904. The annual rings 903 are arranged concentrically around the tree heart 902. Note that the annual ring 903 may be a non-circular closed figure as the tree grows.

  The timber 905 is obtained by further drying raw material obtained by cutting from the wood 901, and becomes a material for building materials and tools. Here, consider a case in which timber 905 is obtained based on raw material cut out from the wood 901 along the one-dot chain line in FIG. The surface on the tree core 902 side of the timber 905 is referred to as a tree back 906. Further, the surface of the timber 905 on the bark 904 side is referred to as a tree table 907. In this case, as shown in FIG. 7, when the raw material is dried to become a timber 905, the wood surface 907 side (bark 904 side) warps so as to narrow.

  Because of this nature of wood, it must be borne in mind that it can be deformed in the future when making wood products. However, some wood products are not desirable to deform. For example, a wooden billiard cue can greatly affect the playing field when deformed. In this regard, Patent Document 1 discloses an invention of a billiard cue made so as not to cause bending.

  The billiard cue described in Patent Document 1 is a center having a cross-shaped cross-section so that square wood 20 is produced from raw wood 10 and intersects at a right angle at the center of the produced square wood 20 and the end contacts the edge of the square wood. Only the member 21 is left, the peripheral members 22, 23, 24, and 25 are cut in the length direction of the square member, and the peripheral members 22, 23, 24, and 25 are moved to the central member 21 in a direction opposite to the annual rings of the central member 21. Made by rejoining. According to Patent Document 1, the joined square member 20 ′ is deformed by the original square member 20, that is, the deforming force of the central member 21 due to the directionality of the annual rings and a plurality of peripheral members 22, 23, 24. , 25 cancel each other and no deformation occurs, and the straight state can be maintained.

JP-T-2006-528020

  In the billiard cue described in Patent Document 1, the cross-shaped central member 21 forming a skeleton occupies a larger part of the cross-section of the billiard cue than the peripheral members 22, 23, 24, and 25. . For this reason, the deformation force of the central member 21 becomes larger than the deformation force of the peripheral members 22, 23, 24, 25, and the peripheral members 22, 23, 24, 25 are bent.

  The peripheral members 22, 23, 24, and 25 are all in contact with only the central member 21. That is, the deformation of the peripheral members 22, 23, 24, 25 can be prevented only by the central member 21.

  Then, cutting out the peripheral members 22, 23, 24, and 25 from the square member 20 so as to remove the corners of the cross-sectional shape of the square member 20 requires operator skill. An operator forms an unintentional cut in the valley portion on the side surface of the central member 21 when cutting the peripheral members 22, 23, 24, and 25 due to operational mistakes and skill levels, and the strength of the central member 21 is increased. It can also be weakened.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a wood product that can be easily manufactured and has little deformation.

  The wood product of the present invention is obtained by cutting the square bar parallel to one side pair consisting of a first side surface and a second side surface parallel to each other in the square bar having a rectangular cross section, and is on the first side surface side. A plurality of partial members each having a bonding surface and a second bonding surface on the second side surface side are bonded to each other, and a bonded square bar formed in the same cross-sectional shape as the square bar is provided. A joining location also joins the first side surfaces or the second side surfaces.

  The wood product of the present invention viewed from another surface is parallel to one side pair consisting of the first side surface and the second side surface parallel to each other in the square member having a rectangular cross section, and the third side surface and the second side surface parallel to each other. The square member is cut in parallel to the other pair of side surfaces including four side surfaces, and the first joint surface on the first side surface side, the second joint surface on the second side surface side, and the third side surface side. A plurality of partial members each having a third bonding surface and a fourth bonding surface on the fourth side surface side are bonded to each other, and a bonded square bar formed in the same cross-sectional shape as the square bar is provided. In any of the joining locations, the first side surfaces, the second side surfaces, the third side surfaces, or the fourth side surfaces are joined.

  The method for producing a wood product according to the present invention is a method for producing a wood product comprising a joined square member, and is provided on one side pair consisting of a first side surface and a second side surface parallel to each other in a square member having a rectangular cross section. Cutting the parallel bars in parallel to obtain a plurality of partial members each having a first joint surface on the first side surface side and a second joint surface on the second side surface side; Alternatively, the second side surfaces are joined to each other, and a plurality of the partial members are formed in the same cross-sectional shape as the square member to obtain the joined square member.

  The method for producing a wood product according to the present invention as seen from another aspect is a method for producing a wood product comprising a joined square member, the first and second side surfaces of the square member having a rectangular cross section being parallel to each other. Cutting the square bar in parallel with the other side pair consisting of the third side surface and the fourth side surface parallel to each other side surface pair, and the first joint surface on the first side surface side. Obtaining a plurality of partial materials each having a second joining surface on the second side surface side, a third joining surface on the third side surface side, and a fourth joining surface on the fourth side surface side; Bonding one side surface, the second side surfaces, the third side surfaces or the fourth side surfaces, forming a plurality of the partial members in the same cross-sectional shape as the square member, and obtaining the joined square member; .

  According to the present invention, a square product is cut at a cut parallel to its side surface, so that a wood product can be easily manufactured. And since the side surfaces which carry out the opposite warp method join and the curvature of adjacent partial materials is canceled, the deformation | transformation of a wood product becomes small.

It is a front view of a billiard cue (wood products). It is a perspective view for demonstrating the cross-sectional structure of a bat. It is sectional drawing of a bat. (A)-(d) is sectional drawing which shows the flow which forms a joined square bar from a square bar. It is sectional drawing which shows another division | segmentation method of a square. It is a schematic sectional view of wood. It is typical sectional drawing of the timber obtained from the timber.

  One embodiment will be described with reference to FIGS. In the present embodiment, a wooden billiard cue 101 is taken as an example of a wood product, and an application example to the billiard cue 101 will be described.

  FIG. 1 is a front view of a billiard cue (wood product) 101. The billiard cue 101 has a shaft 102 and a bat 103, is long, and becomes thinner toward the tip.

  The shaft 102 is located on the tip side of the billiard cue 101. The length of the shaft 102 is substantially half of the length of the billiard cue 101. A ferrule 104 and a tip 105 are attached to the tip of the shaft 102.

  The bat 103 is located on the rear end side of the billiard cue 101. The length of the bat 103 is approximately half the length of the billiard cue 101. A grip 106 is provided on the outer periphery of the middle of the bat 103. A butt cap 107 and a bumper 108 are provided at the rear end of the bat 103.

  The shaft 102 and the bat 103 are connected by a connecting portion 109. The connecting portion 109 includes a joint pin, a joint insert, a joint collar, and a joint ring.

  Hereinafter, the structure of the bat 103 will be described with reference to FIGS. FIG. 2 is a perspective view for explaining a cross-sectional structure of the bat 103. FIG. 3 is a cross-sectional view of the bat 103. The bat 103 is formed by cutting the bonded square member 111 into a tapered shape. The bonded square member 111 is formed by bonding the side surfaces of the plurality of partial members 112 with an adhesive. The plurality of partial members 112 are formed by cutting a single square member 113 (see FIGS. 4A to 4D) having a rectangular cross section. What is important here is that the plurality of partial members 112 are joined in such a direction as to cancel the deformation of the wood that is warped by drying (described above based on FIGS. 6 and 7).

  FIG. 4A to FIG. 4D are cross-sectional views showing a flow of forming the joined square member 111 from the square member 113. The square material 113 is made of hard wood such as maple, kokutan (ebony), rosewood or the like. The square member 113 has two pairs of side surfaces 114 and 115. In each side surface pair 114, 115, two side surfaces constituting the side surface pair 114, 115 are parallel to each other. Here, the two side surfaces constituting one side pair 114 are referred to as a first side surface 116 and a second side surface 117. The two side surfaces constituting the other side surface pair 115 are referred to as a third side surface 118 and a fourth side surface 119.

  First, reference is made to FIG. The square member 113 is cut along two parting lines C <b> 1 parallel to one side pair 114 including the first side surface 116 and the second side surface 117. Thereby, the three 1st partial materials 121 (refer FIG.4 (b)) are obtained.

  Next, refer to FIG. Each first partial member 121 has a first joint surface 122 on the first side surface 116 side and a second joint surface 123 on the second side surface 117 side. The three first partial members 121 are bonded to the same cross-sectional shape as the square member 113 in a direction that cancels out the warpage due to drying. More specifically, in any joint portion between the first partial members 121, the first joint surfaces 122 or the second joint surfaces 123 face each other, and these are joined with an adhesive. In order to make the first bonding surfaces 122 or the second bonding surfaces 123 face each other, the first partial member 121 is rotated every other one so that the position of the third side surface 118 and the position of the fourth side surface 119 are switched. .

  Next, refer to FIG. What was obtained by joining as described above is referred to as an intermediate 124. On one side surface of the intermediate body 124, the portion that was the third side surface 118 and the portion that was the fourth side surface 119 are alternately arranged. The intermediate body 124 is cut along two dividing lines C2 parallel to the other side surface pair 115 including the third side surface and the fourth side surface 119. Thereby, the three 2nd partial materials 125 (refer FIG.4 (d)) are obtained.

  Next, refer to FIG. Each second partial member 125 has a third joint surface 126 facing the third side surface 118 side in the square member 113 and a fourth joint surface 127 facing the fourth side surface 119 side in the corner member 113. . The three second partial members 125 are joined in the same cross-sectional shape as the square member 113 so as to cancel the warpage due to drying. More specifically, in any joint portion between the second partial members 125, the third joint surfaces 126 or the fourth joint surfaces 127 face each other, and these are joined with an adhesive. In order to make the third bonding surfaces 126 or the fourth bonding surfaces 127 face each other, every other second partial member 125 is placed so that the position of the first bonding surface 122 and the position of the second bonding surface 123 are switched. Rotate.

  By the joining as described above, the joined square member 111 is obtained (see FIG. 3). In the cross section of the bonded square member 111, the partial members 112 obtained by dividing the square member 113 by the dividing line C1 and the dividing line C2 are arranged in three rows and three columns. Further, on one side surface of the joined square member 111, the portion that was the first side surface 116 and the portion that was the second side surface 117 are alternately arranged.

  The bat 103 is formed by cutting the bonded square member 111 made from the single square member 113 into a tapered shape. It is desirable from the viewpoint of weight balance that the bonded square member 111 used when forming the bat 103 is symmetrical in cross section in both the top and bottom and the left and right. More preferably, the bonded square member 111 is formed by dividing the square member 113 having a square shape with a cross-sectional length of 24 mm and a width of 24 mm so that each side in the cross-sectional shape is divided into 9 mm, 6 mm, and 9 mm (see FIG. 4 (a), a1 = 9 mm, a2 = 6 mm, and a3 = 9 mm, and b1 = 9 mm, b2 = 6 mm, and b3 = 9 mm in FIG.

  The shaft 102 is formed by cutting the bonded square member 111 into a taper shape that is thinner than the butt 103. The structure of the joined square member 111 used when forming the shaft 102 is the same as the structure of the joined square member 111 used when forming the bat 103, and the description thereof is omitted. Here, as described above, when the joined square member 111 used for the shaft 102 is divided and formed into 9 mm, 6 mm, and 9 mm for each side in the cross-sectional shape, the ferrule 104 (see FIG. 1) and the tip 105 ( 1) and the weight balance of the entire billiard cue 101 is advantageous.

  The billiard cue 101 is formed by connecting the shaft 102 and the bat 103 thus formed. In the billiard cue 101, since the plurality of partial members 112 are made from one square member 113, each partial member 112 tends to bend with the same curvature. Here, in the joining location of the partial materials 112, the first joining surfaces 122, the second joining surfaces 123, the third joining surfaces 126, or the fourth joining surfaces 127 are joined together. For this reason, any deformation of the plurality of partial members 112 is offset by another adjacent partial member 112. As a result, the deformation of the billiard cue 101 is reduced. Further, since the joined square member 111 that is the basis of the billiard cue 101 is obtained by cutting the square member 113 with a cut parallel to the side surface thereof, the manufacture becomes easy.

  In the present embodiment, the billiard cue 101 has been described as an example of a wood product, but the joined square member 111 can be applied to various wood products. For example, a square member with a cross-sectional shape of several tens of centimeters square can be divided and joined according to the procedure shown in FIGS. In addition, square members having a cross-sectional shape of several centimeters square can be divided and joined in the same manner to form pedestals such as desks, chairs, and shelves.

  FIG. 5 is a cross-sectional view showing another method for dividing the square bar 113. 4 (a) to 4 (d) show the method of dividing the square bar 113 into 3 × 3, but the method of dividing the square bar 113 to form the bonded square bar 111 is limited to this. There is no. As an example, the number of divisions of the square member 113 may be 2 × 2, 4 × 4, 5 × 5,. As another example, as shown in FIG. 5, the square bar 113 may be divided by a dividing line C <b> 3, and the number of divisions of the square bar 113 may be different between vertical and horizontal.

  Further, as shown in FIGS. 4C and 4D, the intermediate body 124 is joined to the square member without dividing the intermediate body 124 in parallel with the side surface pair 115 (the third side surface 118 and the fourth side surface 119). The intermediate 124 may be processed as 111 and applied to a wood product such as the billiard cue 101.

101 Billiard cue (wood products)
111 Joined square material 112 Partial material 113 Square material 116 First side surface 117 Second side surface 118 Third side surface 119 Fourth side surface 122 First joint surface 123 Second joint surface 126 Third joint surface 127 Fourth joint surface

Claims (4)

A first joint surface and a second side surface on the first side surface obtained by cutting the square material in parallel with one side surface pair consisting of a first side surface and a second side surface parallel to each other in a rectangular material having a rectangular cross section. Bonding a plurality of partial materials each having a second bonding surface on the side, comprising a bonded square member formed in the same cross-sectional shape as the square member,
Any joint location between the partial materials is obtained by joining the first side surfaces or the second side surfaces.
Wood products. The square member having a rectangular cross section is parallel to one side pair consisting of the first side surface and the second side surface parallel to each other, and parallel to the other side surface pair consisting of the third side surface and the fourth side surface parallel to each other. It is obtained by cutting a square bar and is on the first side surface on the first side surface side, on the second side surface on the second side surface side, on the third side surface on the third side surface side, and on the fourth side surface side. Joining a plurality of partial members each having a fourth joint surface, comprising a joined square member formed in the same cross-sectional shape as the square member,
Any joint location between the partial materials is obtained by joining the first side surfaces, the second side surfaces, the third side surfaces, or the fourth side surfaces.
Wood products. A method for producing a wood product comprising bonded slabs,
The square member is cut in parallel with one side pair consisting of the first side surface and the second side surface parallel to each other in the square member having a rectangular cross section, and the first joint surface and the second side surface side on the first side surface side Obtaining a plurality of partial materials each having a second joining surface
Bonding the first side surfaces or the second side surfaces and forming the plurality of partial members in the same cross-sectional shape as the square member to obtain the joined square member;
A method for manufacturing a wood product comprising: A method for producing a wood product comprising bonded slabs,
The square member having a rectangular cross section is parallel to one side pair consisting of the first side surface and the second side surface parallel to each other, and parallel to the other side surface pair consisting of the third side surface and the fourth side surface parallel to each other. Cutting the square bar, the first joint surface on the first side surface side, the second joint surface on the second side surface side, the third joint surface on the third side surface side, and the fourth side on the fourth side surface side. Obtaining a plurality of partial materials each having four joint surfaces;
The first side surfaces, the second side surfaces, the third side surfaces, or the fourth side surfaces are bonded to each other, and a plurality of the partial materials are formed in the same cross-sectional shape as the square bar to obtain the bonded square bar. Process,
A method for manufacturing a wood product comprising:

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