JP2012020116A - Game nail for plastic game board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a game nail for plastic game boards which can be driven into a game board made from foamed plastic without swelling the surface.SOLUTION: A game nail Nto be driven into a plastic game board P made from foamed plastic, has a distal end of a body shaft 1 with a spiral section S for preventing fall-off, while being driven into the game board P. The distal end of the spiral section S has a conical or pyramidal protrusion 3 to be inserted into a positioning hole 21 formed in advance in the plastic game board P. The outside diameter (D) of the base end of the protrusion 3 is formed smaller than the outer diameter (D) of the spiral section S, and the end faces 6 of a plurality of spiral projections 4 which form the spiral section S are exposed at the junction between the spiral section S and the protrusion 3.

Description

  The present invention relates to a game nail for a resin game board that can be driven into a game board formed of foamed resin.

  Technology to replace veneer game boards with foamed resin has been developed due to depletion of wood resources, but it is related to "nailability" related to driving game nails into resin game boards, and holding power after being driven In a plurality of aspects such as “nail retention” and “dimensional stability” with respect to temperature change, a veneer game board and a resin game board comparable to those of a veneer have not yet been formed.

  Even if we specialize in “nailability” which is the field of the present invention, when using a resin foamed to the extent that nailing is possible, it is natural that the “nail holding power” is low and necessary. It is difficult to secure a strong “nail holding power”. On the other hand, in the case of a resin with a small amount of foaming enough to have a “nail holding force”, it becomes difficult to hit the nail. For this reason, a number of techniques have been proposed in which a pilot hole having an inner diameter smaller than the nail diameter is drilled in advance on a resin game board and the game nail is driven into the pilot hole (Patent Document 1). However, in this technique, it is indispensable to drill a number of pilot holes in advance in a resin game board, and compared to a conventional veneer game board, the manufacturing process is increased and the number of processes is increased. This results in high costs.

  On the other hand, as a game nail used in a veneer game board, there is one disclosed in Patent Document 2. This game nail is provided with a plurality of pointed wedges with a wedge-shaped cross-section with the outer diameter gradually decreasing toward the tip at the tip of the main body shaft part, preventing the connection between each pointed head It is the structure in which the projection part to perform was formed. The game nail having this configuration has a problem that since the volume of the portion to be driven into the game board is reduced, the distortion generated in the game board is reduced, but the holding force of the nail with respect to the game board is reduced.

  Further, as shown in FIG. 8, as a game nail N ′ to be driven into a veneer game board, as shown in FIG. 8, a retaining spiral portion 32 is formed at the distal end portion of the main body shaft portion 31, and at the distal end of the spiral portion 32. A structure in which a conical protrusion 33 is formed is often used. When the game nail N ′ is driven into the resin game board P, the outer diameter of the base end of the protruding portion 33 is the same as the outer diameter of the spiral portion 32, and the spiral portion 32 is the tip of the main body shaft portion 31. The spiral portion 32 is not formed at a portion close to the tip of the main body shaft portion 31. As a result, at the initial stage when the projection 33, which is the tip of the main body shaft portion 31, bites into the game board P, the projection 33 and the spiral portion 32 of the main body shaft portion 31 connected thereto are not formed. Although the portion 31a bulges in a state where the periphery of the main body shaft portion 31 in the game board P is greatly raised, the presence of the raised portion 41 does not directly affect the rolling of the game ball, but the appearance Becomes extremely bad.

JP 2000-84164 A JP 2008-228962 A

  An object of the present invention is to provide a game nail for a resin game board that can be driven into a game board molded of foamed resin without greatly raising the driving surface.

  The invention of claim 1 for solving the above-mentioned problem is a game nail that is driven into a resin game board formed of foamed resin, and is driven into the resin game board at the tip of the main body shaft. In this state, a spiral portion for preventing the slipping is formed, and a conical or pyramidal projection that is inserted into a positioning hole formed in advance in the resin game board is formed at the tip of the spiral portion. In addition, the outer dimension of the base end of the protrusion is smaller than the outer diameter of the spiral, and a plurality of spiral protrusions that form the spiral at the connection between the spiral and the protrusion. It is characterized in that the end face of is exposed and formed.

  According to the invention of claim 1, since the end surfaces of the plurality of spiral protrusions forming the spiral portion in the game nail are exposed at the connection portion between the spiral portion and the projection portion, the resin game When the head of the game nail is struck in a state where the projection at the tip of the game nail is inserted into the positioning hole formed in advance in the board, first, the end surfaces of the plurality of spiral ridges are independent of the game board In the state of being pierced, the spiral portion is driven into the game board, and subsequently, a portion connected to the spiral portion in the main body shaft portion is driven. Here, in the state where the end surfaces of the plurality of spiral ridges of the game nail are pierced independently of the game board, the spiral part is driven into the game board, so that the game nail driving part in the resin game board is The helical nail is compressed in the direction in which the game nail is driven, and a spiral groove is formed in the spiral portion between adjacent spiral protrusions. The volume per unit length of the spiral portion is the spiral of the main body shaft portion. Since the volume of the portion excluding the portion (portion where the spiral groove is not formed) is smaller, it means that the volume at which the game nail excludes the resin constituting the game board is small at the beginning of the game nail. As a result, the game nail according to the invention of claim 1 is synergistic with the action of compressing the resin constituting the game board in the initial stage of game nail insertion and the reduced volume of resin removed by the game nail. The amount of resin that bulges around the game nail on the driving surface is reduced, and after the game nail is driven, the resin bulge around the game nail is hardly recognized, and the resin game board It becomes possible to drive without trouble.

  According to the invention of claim 1, since the resin constituting the game board is compressed by driving the game nail into the resin game board, the game nail is driven in as compared with the game nail of the conventional shape. The density of the resin at the periphery of the game nail is increased, and the holding power of the game nail with respect to the resin game board is increased.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the end surfaces of the plurality of spiral ridges are formed on the same surface, and when the game nail is driven, each spiral ridge is formed. Since the game bites into the game board at the same time, the game board can be surely driven in the direction in which the game nail is set.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, there is no step between the groove bottom of the spiral groove portion forming the spiral portion and the maximum diameter portion of the base end of the projection portion. Since it is connected, it becomes easy to pierce each spiral protrusion with respect to a game board.

  According to a fourth aspect of the present invention, when the outer diameter of the main body shaft portion is 1.8 mm in any one of the first to third aspects of the invention, the length of the conical protrusion and the base end The outer diameters are 1.5 mm and 1.2 mm, respectively, and 0.3 mm can be secured as the height of the plurality of spiral ridges constituting the spiral portion, so that the game nail is attached to the resin game board. When driving the game board, it is possible to reliably bite the front end surface of each spiral protrusion with respect to the game board.

  The invention of claim 5 is the invention of claim 1, wherein the protrusion is conical and connected to the spiral portion via a cylindrical portion having the same diameter as the largest diameter portion of the protrusion. It is characterized by having. For this reason, according to the invention of claim 5, since there is a cylindrical portion having an outer peripheral surface orthogonal to the end surface of the spiral portion, the compression action of the resin constituting the game board is increased, and the game board is placed on the driving surface. The amount of the resin bulging around the game nail is further reduced, and the resin bulge around the game nail is hardly recognized after the game nail is driven.

  The invention according to claim 6 is the invention according to claim 1, wherein the projection is conical and has a diameter larger than a maximum diameter portion of the projection and is larger than an outer diameter of the spiral portion. Is connected to the spiral portion via a small-diameter circumferential portion. According to the invention of claim 6, since there are end faces at both the connecting portion between the projection and the cylindrical portion and the connecting portion between the cylindrical portion and the spiral portion, in other words, when the game nail is driven, Two end faces that compress the resin constituting the game board are provided in a distributed manner, and the resin constituting the game board is compressed twice in different parts of the game nail (the two end faces described above). Since it is compressed, the compression effect on the resin constituting the game board when the game nail is driven is further enhanced. As a result, the amount of resin bulging around the game nail on the game board driving surface is further reduced.

  The invention of claim 7 is characterized in that, in the invention of any one of claims 1 to 6, the cross section of the spiral protrusion is trapezoidal and the cross section of the spiral groove is an inverted triangle. The spiral protrusions are easily pierced with respect to the game board.

  The invention according to claim 8 is a game nail that is driven into a resin game board formed of foamed resin, and prevents the removal of the game nail in the state of being driven into the game board at the tip of the main body shaft. A protrusion for insertion into a positioning hole formed in advance in the resin game board is formed at the tip of the spiral, and an annular recess is formed at the tip of the spiral As a result of the formation of the protrusions, the protrusions projecting from the other parts are formed at the center.

  The game nail according to the invention of claim 8 has a configuration in which an annular recess is formed on the front end surface of the spiral portion, which is the front end surface of the main body shaft portion, and a projecting portion protrudes from the central portion (center portion) of the front end surface Therefore, the area of the portion that exerts a compressive force on the resin that constitutes the game board when the game nail is driven, as compared to a game nail that has a conical or pyramidal projection protruding from the end surface. Becomes larger. On the other hand, since a projection is provided at the tip of the main body shaft, the head of the game nail is hit with the projection inserted in a positioning hole formed in advance in a resin game board. Thus, the game nail can be correctly driven into a predetermined position on the game board. Thus, the game nail according to the invention of claim 8 further increases the compressive force exerted on the resin constituting the game board. Therefore, after the game nail is driven, the swelling of the resin around the game nail is increased. The protruding portion is almost eliminated, and the density of the resin around the game nail that has been driven in is further increased, so that the retention of the game nail with respect to the resin game board is further enhanced.

  According to the invention of claim 1, a game in a resin game board is obtained by driving the spiral portion into the game board in a state where the end faces of the plurality of spiral protrusions of the game nail are pierced independently of the game board. The nail driving portion is compressed in the game nail driving direction and the volume of resin removed by the game nail is small, and the resin swells around the game nail on the game board driving surface. After the game nail is driven, the amount of the resin bulge around the game nail is hardly recognized and can be driven into the resin game board without any trouble. Moreover, since the resin constituting the game board is compressed by driving the game nail into the resin game board, the density of the resin at the periphery of the game nail is compared with the conventional game nail. As a result, the holding power of the game nail with respect to the resin game board is enhanced.

  According to the eighth aspect of the present invention, an annular recess is formed on the front end surface of the spiral portion, which is the front end surface of the main body shaft portion, and the protrusion is projected at the center (center) of the front end surface. Therefore, the area of the portion that exerts a compressive force on the resin constituting the game board when the game nail is driven is larger than that of the game nail having a conical or pyramidal projection protruding from the end surface. Therefore, since the compressive force exerted on the resin constituting the game board is even greater, there is almost no resin bulge around the game nail after the game nail is driven.

It is a perspective view of a gaming nail N ₁ of the first embodiment of the present invention. (A), (b) are a front view and an enlarged right side view of the gaming nail N _1, respectively. (A), (b) is an expanded sectional view of the part of the positioning hole 21 of the game board P, respectively, and an enlarged sectional view of the state in which the projection 3 of the game nail N ₁ is inserted into the positioning hole 21 of the game board P is there. (C), (d) is a partially enlarged cross-sectional view of the state where each spiral protrusion 4 of the game nail N ₁ bites into the game board P, and the game nail N ₁ is driven into the game board P. It is a partial expanded sectional view in the middle of being. FIG. 6 is a cross-sectional view of a state in which a game nail N ₁ is driven into the game board P. (A), (b) is a perspective view and a front view of the tip of the game nail N ₂ of Example 2 of the present invention. (A), (b) is a perspective view and a front view of the tip of the gaming nail N ₃ of the third embodiment of the present invention. (A) is a perspective view of the distal portion of the gaming nail N ₄ in Example 4. (B) is a bottom view of the game nail N ₄ Example 4 of the present invention, (c), (d) is a line X-X and line Y-Y cross-sectional view of (b). It is sectional drawing of the fixed state (driving state) of the game nail N 'driven into the veneer game board.

  Hereinafter, the present invention will be described in more detail with reference to a plurality of examples.

First, with reference to FIG. 1 and FIG. 2, the game nail N _{1 according to the} first embodiment of the present invention will be described, and thereafter, with reference to FIG. 3A, FIG. 3B and FIG. An operation in which the game nail N ₁ is driven into the game board (hereinafter simply referred to as “game board”) P will be described. FIG. 1 is a perspective view of a game nail N _{1 according} to the present invention, and FIGS. 2A and 2B are a front view and an enlarged right side view of the game nail N ₁ , respectively.

  The game board P (see FIG. 4) is formed of foamed resin, and can be naild by a nailing machine for a conventional veneer game board (nailing performance) and the nail that is driven is more than a certain level. It is essential to have pull-out strength (nail retention), and in addition to this, thermal displacement with respect to temperature change must be a certain value or less (dimensional stability).

1 and 2, a game nail N ₁ is formed of brass, which is an alloy of copper and zinc, and is driven into the game board P. A head 2 is formed at one end, and a spiral portion S having a predetermined length is formed at the other end. At the tip of the spiral portion S, a conical protrusion 3 is formed which is inserted into a positioning hole 21 formed in advance at a fixed position of the game nail N _{1 on} the surface of the game board P. The spiral portion S is formed by a plurality of spiral ridges 4 (5 in the embodiment), and the same number of spiral grooves 5 as the spiral ridges 4 are formed between adjacent spiral ridges 4. Yes. Each cross section of the spiral protrusion 4 and the spiral groove 5 has an irregular trapezoidal shape and an irregular triangular shape, respectively, and the bottom of the spiral groove 5 coincides with the outer periphery of the base end of the protrusion 3. For this reason, each end face 6 of each spiral protrusion 4 is exposed on the projection 3 side, and the end face 6 is formed.

Regarding the dimensions of each part of the game nail N ₁ , the overall length (L ₁ ), the length of the spiral portion S (L ₂ ), and the length of the protrusion 3 (L ₃ ) are 33 mm, 6.5 mm, 1 0.5 mm, the outer diameter (D ₁ ) of the main body shaft portion 1 and the spiral portion S is 1.8 mm, and the outer diameter (D ₂ ) of the base end of the protruding portion 3 is 1.2 mm. Therefore, the height of the spiral protrusion 4 is 0.3 mm.

Next, FIG. 3-A, with reference to FIG. 3-B and 4, the gaming nail N ₁ is the operation will be described, which are discharged against the game board P. 3A (a) and 3 (b) are enlarged cross-sectional views of the positioning hole 21 portion of the game board P, respectively, in a state in which the projection 3 of the game nail N ₁ is inserted into the positioning hole 21 of the game board P. is an enlarged sectional view, FIG. 3 over B (c), (d) is a partial enlarged sectional view of the helical state ridges 4 bite of gaming nail N ₁ relative to the game board P, respectively, on the game board P 4 is a partially enlarged cross-sectional view in the middle of the game nail N ₁ being driven, and FIG. 4 is a cross-sectional view of the game nail N ₁ driven into the game board P.

First, as shown in FIGS. 3A (a) and 3 (b), the protrusion 3 at the tip of the game nail N ₁ is inserted into the positioning hole 21 formed on the surface of the game board P, so that the game The fixed position of the game nail N ₁ with respect to the board P is determined. In this state, when the slap in addition an impact force F ₀ on the head 2 of the gaming nail N _1, and the end face 6 is formed so as to be exposed to the leading ends of the spiral ridge 4 of the gaming nail N ₁ helix S Therefore, as shown in FIGS. 3B (c) and 3 (d), the end surface 6 at the tip of each spiral protrusion 4 of the spiral portion S momentarily contacts the surface 23 of the game board P. Later, each of the spiral protrusions 4 bites into the game board P at the end face 6 portion. Thereafter, the main body shaft portion 1 of the game nail N ₁ is driven into the game board P while rotating slightly, corresponding to the spiral direction of the spiral portion S (see FIG. 4).

In this way, the spiral portion S, which is the tip of the game nail N ₁ , bites into the game board P as it is when each end surface 6 abuts against the surface of the game board P at the beginning. Accordingly, the portion gaming nail N ₁ in the gaming board P made of resin has been implanted is compressed driving direction of the game the nail N _1. In FIG. 3B, the compressive force exerted on the game board P by the game nail N ₁ is indicated by F ₁ . On the other hand, each of the spiral protrusions 4 formed on the main body shaft portion 1 is formed continuously with the end face 6 portion except for the protrusion 3 at the front end of the main body shaft portion 1, and the game nail N _Since the volume of the tip portion of ₁ is reduced by an amount corresponding to the plurality of spiral grooves 5 as compared with the case where the spiral portion S is not formed, the volume of the main body shaft portion 1 of the game nail N ₁ is reduced. At the beginning of the spiral portion S, which is the tip portion, biting into the game board P, the tip portion of the spiral portion S smoothly bites into the game board P. As described above, when the game nail N ₁ is driven, the game nail N ₁ exerts a compressive force on the resin constituting the game board P, and the plurality of spiral ridges 4 constitute the game board P. When the spiral portion S at the front end of the game nail N ₁ bites into the game board P for the first time, the resin that constitutes the game board P is forcibly removed. Therefore, the rising amount of the rising portion 22 around the main body shaft portion 1 of the game nail N ₁ on the surface side of the game board P is smaller than that of the conventional game nail N ′ described above. The appearance of the game board P is not harmed.

Further, the presence of the end face 6 at the front end portion of the game nail N ₁ compresses the resin that constitutes the game board, thereby increasing the density of the resin around the game nail N ₁ that has been driven in, so that the game of the conventional shape Compared with the nail N ′, the holding force of the game nail N ₁ with respect to the resin game board P is increased.

Next, with reference to FIG. 5, the game nail N ₂ of Example 2 of the present invention. In the game nail N ₂ , in the game nail N ₁ , a cylindrical portion 7 having the same diameter as the largest diameter portion of the protrusion 3 is formed between the spiral S and the conical protrusion 3. The cylindrical portion 7 is different from the gaming nail N _{1 in the} configuration connected via the cylindrical portion 7.

In the game nail N ₂ , due to the presence of the cylindrical portion 7, the end surface 6 of the spiral portion S and the outer peripheral surface of the cylindrical portion 7 are orthogonal over the entire circumference, and the resin is compressed by the three-dimensional surfaces orthogonal to each other. When the game nail N ₂ is driven, the compression action of the game nail N _{2 on} the resin constituting the game board P increases, and after the game nail N ₂ is driven, the resin around the game nail N ₂ bulges out. The part is hardly recognized.

In addition, the game nail N _{3 according to the} third embodiment of the present invention shown in FIG. 6 is the maximum outside of the conical protrusion 3 ′ formed integrally with the tip of the cylindrical portion 7 in the game nail N ₂ . The diameter is reduced and another end face 8 is formed between the projection 3 ′ and the cylindrical part 7. Accordingly, in the game nail N ₃ , there are two end faces 6 and 8 that exert a compressive force on the resin constituting the game board P when the game nail N ₃ is driven. As described above, in the game nail N ₃ , when the game nail N ₃ is driven, the compressive force F ₂ due to the end surface 8 of the connection portion between the projection 3 ′ and the cylindrical portion 7 with respect to the resin constituting the game board P is obtained. Since the compression force F ₁ due to the end face 6 of the connecting portion between the cylindrical portion 7 and the spiral portion S acts on almost the same portion with a slight time difference, the compression action of the resin by the game nail N ₃ As a result, after the game nail N ₃ is driven, the resin bulge around the game nail N ₃ is hardly recognized.

Next, with reference to FIG. 7-A and Fig. 7-B, will be described gaming nail N ₄ Example 4 of the present invention. The game nail N ₄ has an annular recess 11 formed on the distal end surface of the spiral portion S so that the outer peripheral edge 4a constituting the distal end surface of each spiral protrusion 4 of the spiral portion S has an acute angle. The protrusion 12 is formed on the surface. Therefore, at the time of implantation of the game nail N _4, the full portion forming the bottom surface of the annular recess 11, to exert a compressive force F ₃ to the resin constituting the game board P, the spiral of the game nail N ₄ The area of the portion that exerts the compressive force F ₃ on the tip surface of the portion S becomes larger than the game nails N _{1 to} N _{3 in the first to third} embodiments, and the compressive force F ₃ itself increases. As a result, after implantation of the game nail N _4, from resin around the game nail N ₄ bulges can more reliably prevented.

Further, since the compression action of the resin constituting the game board P by the game nail N ₄ is larger than that of each of the game nails N _{1 to} N _{3, the} game against the game board P after being driven into the resin game board P The holding force of the nail N ₄ is further increased. Further, at the time of nailing start, in order to sharp outer peripheral edge 4a of each spiral protrusion 4 of the spiral portion S bite with protrusion 12 with respect to the resin constituting the game board P, the gaming nail N ₄ The driving posture is stabilized.

Further, in the game nails N _{1 to} N _{4 of} the above embodiment, the number of spiral ridges is 5, but any number may be used as long as the number of the ridges is plural, and the cross-sectional shape of the spiral ridge is irregular. Since it has a trapezoidal shape, there is an advantage that it is difficult to collapse at the time of driving and after driving, but it may be triangular, and the cross-sectional shape of the spiral groove is an irregular inverted triangular shape, so Although there is an advantage that the number of strips can be increased, an irregular inverted trapezoidal shape may be used.

Further, the projecting portions 3 and 3 ′ of the game nails N _{1 to} N ₃ of the above embodiment are conical, but may be pyramidal.

D ₁ : outer diameter of the spiral
D ₂ : Outer diameter of the base end of the protrusion
F _{1 to} F ₃ : Compression force
N _{1 to} N ₄ : Game nails
P: Resin game board
S: Spiral part
1: Body shaft
3, 12: Projection
4: Spiral ridge
5: Spiral groove
6, 8: End face of spiral ridge
7: Cylindrical part
11: Annular recess
21: Positioning hole

Claims (8)

A game nail that is driven into a resin game board formed of foamed resin,
A spiral portion is formed at the distal end portion of the main body shaft portion to prevent it from being pulled into the game board. A positioning hole previously formed in the resin game board is formed at the distal end of the spiral portion. A conical or pyramidal protrusion to be inserted is formed,
The outer dimension of the base end of the protrusion is smaller than the outer diameter of the spiral, and the end surfaces of the plurality of spiral protrusions form the spiral at the connection between the spiral and the protrusion. A game nail for a resin game board, characterized in that is formed to be exposed.   The game nail for a resin game board according to claim 1, wherein end surfaces of the plurality of spiral protrusions are formed on the same surface.   3. The resin according to claim 1, wherein a groove bottom of the spiral groove portion forming the spiral portion and a portion of the maximum diameter of the base end of the protruding portion are connected without causing a step. Game nails for game boards.   The length of the conical protrusion and the outer diameter of the base end are 1.5 mm and 1.2 mm, respectively, when the outer diameter of the main body shaft portion is 1.8 mm. A game nail for a resin game board according to any one of 1 to 3.   2. The resin game according to claim 1, wherein the protruding portion is conical and connected to the spiral portion via a cylindrical portion having the same diameter as the largest diameter portion of the protruding portion. Board nails.   The protrusion is conical and has a diameter larger than that of the maximum diameter of the protrusion, and is connected to the spiral via a circumferential portion having a diameter smaller than the outer diameter of the spiral. The game nail for a resin game board according to claim 1, wherein the game nail is made of resin.   The game nail for a resin game board according to any one of claims 1 to 6, wherein a cross section of the spiral protrusion is trapezoidal and a cross section of the spiral groove portion is an inverted triangle. A game nail that is driven into a resin game board formed of foamed resin,
A spiral portion is formed at the distal end portion of the main body shaft portion to prevent it from being pulled into the game board. A positioning hole previously formed in the resin game board is formed at the distal end of the spiral portion. A protrusion to be inserted is formed,
A game nail for a resin game board, characterized in that an annular recess is formed on the front end surface of the spiral portion, so that the projection protruding from the other portion is formed at the center.

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