JP3203051U - Bamboo sword and internal mounting material for bamboo sword - Google Patents

Abstract

[PROBLEMS] To provide a lightweight cushioning material made of foamed resin such as foamed urethane in the hollow part of a bamboo sword used in a kendo made by assembling four strips of bamboo pieces into a cylindrical shape. , Provide bamboo swords with relaxation materials that are difficult to separate and scatter. SOLUTION: A rod-shaped relaxation material 5, a sheet 6 wound so as to wrap a side surface of the rod-shaped relaxation material, and a winding tape 9 which is wound around a plurality of places around the outer periphery of the sheet in an internal space of the bamboo sword 1. Are mounted using the double-sided tape 10. [Selection] Figure 1

Description

  The present invention relates to a bamboo sword and an internal mounting member for bamboo swords.

  Bamboo swords used in kendo are made by assembling four strips of bamboo pieces into a cylindrical shape, and the inside is hollow.

  By the way, in Patent Document 1, a lightweight relaxation material made of foamed resin such as urethane foam is provided in the hollow portion inside the bamboo sword, and the core of the bamboo sword is pressed by a protrusion in the shape of the bamboo sword. Proposals have been made for methods to prevent biting, cracking and damage.

Japanese Patent Laid-Open No. 9-10371

  However, when the relaxation material is provided in the hollow portion inside the bamboo sword, the relaxation material is separated and easily scattered during use.

  In order to solve the above-mentioned problems, the present invention provides a safe bamboo sword and an internal mounting member for bamboo swords, in which the relaxation material is difficult to separate and scatter.

In order to solve the above-described problems, the present invention provides the following bamboo swords and internal attachment members for bamboo swords.
(1) A bamboo sword equipped with an internal mounting member having a rod-shaped cushioning material and a sheet wound around the side surface of the rod-shaped cushioning material in the interior space of the bamboo sword.
(2) An internal mounting member for a bamboo sword having a rod-shaped relaxation material and a sheet wound so as to wrap the side surface of the rod-shaped relaxation material used in the internal space of the bamboo sword.
(3) The bamboo sword according to (1) or the internal attachment member for bamboo sword according to (2), which is mounted with a winding tape that is wound around a plurality of places around the outer periphery of the internal mounting member.
(4) The bamboo sword of (1) or (3) or the bamboo sword internal mounting member of (2) or (3), wherein a double-sided tape is mounted on the surface of the internal mounting member.
(5) The sheet is the bamboo sword of (1), (3) or (4) or (2), (3) or ( 4) Internal mounting member for bamboo swords.
(6) The bamboo sword of (1), (3), (4) or (5), wherein the winding tape is intermittently wound from 3 to 9 places in the longitudinal direction of the relaxation material Or the internal mounting member for bamboo swords of (2), (3), (4) or (5).

  ADVANTAGE OF THE INVENTION According to this invention, the relaxation material provided in internal space can provide the safe bamboo sword and internal attachment member for bamboo swords which are hard to separate and fly.

1 shows a partial cross-sectional view of a bamboo sword according to the present invention. 1 shows a perspective view of a moderator according to the present invention. 1 shows a perspective view of an internal mounting member according to the present invention. The perspective view of the state which provided the winding stop tape on the surface of the internal mounting member which concerns on this invention is shown. The perspective view of the state which provided the double-sided tape on the surface of the internal mounting member which concerns on this invention is shown. The cross-sectional perspective view of the state which mounted | wore the internal space of the bamboo sword with the internal mounting member which concerns on this invention is shown.

  The bamboo sword of the present invention is prepared by assembling four strip-shaped bamboo pieces into a cylindrical shape, and the inside is hollow.

  The relaxation material of the present invention is provided in the internal space of the bamboo sword and is made of a soft material. The cross section is preferably 3 to 7 mm and the length is preferably 30 to 40 cm. The place where the rod-shaped relaxation material is provided is preferably from the tip of the sword to the mid-strike hitting portion. Is the material a mixture of starch and main component polyprobin? In addition, foamed resins such as thermoplastic elastomer and urethane foam can be used.

  The sheet of the present invention has a thickness of 5 μm to 30 μm and is wound so as to wrap around the side surface of the relaxation material. Plastic films such as polyvinylidene chloride, polyethylene, and polypropylene, or nonwoven fabrics of these materials can be used. ing. In the case of a plastic film, a fine hole may be opened so that air permeability is good. The number of times of winding depends on the thickness of the sheet, but it is wound around the relaxation material 2 to 10 times.

  The winding tape of the present invention is a sheet that is wound around the outer periphery of the sheet, and a normal commercial product in which an adhesive or an adhesive is applied to one side of a plastic film can be used. The width of the winding tape is about 2 mm to 10 mm, the thickness is about 0.02 mm to 0.08 mm, and the sheet is wound at regular intervals.

The double-sided tape of the present invention is provided in the gap between the outer periphery of the winding-stopping tape or sheet and the inner surface of the bamboo piece of the bamboo sword, and the both surfaces are attached.
A double-sided tape having a width of about 2 mm to 5 mm and a thickness of about 0.05 mm to 1 mm can be used. The attachment method is to hold the sword tip of the bamboo sword with one hand, raise one of the four swords, insert the cushioning material from the sword toward the middle, lower the raised sword, and check the space on the side of the sword. Then, remove the double-sided tape one after another and attach it.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a partial sectional view of a bamboo sword according to the present invention. In particular, the main part of the tip of the bamboo sword is shown.
The bamboo sword is made by assembling four strips of bamboo pieces 1 into a cylindrical shape, and the inside is hollow. A tip rubber 2 with a collar is inserted into the end face of the tip of the bamboo sword, and a tip skin 3 is attached so as to cover the tip rubber 2.
The internal mounting member 4 is provided inside the tip rubber 2 so as to fill the internal space of the tip portion of the bamboo sword around the middle knot 8 with the first node 7 of the bamboo piece 1 approximately in the middle. The basic configuration of the internal mounting member 4 is a rod-shaped cushioning material 5 and a sheet 6 wound so as to wrap around the side surface of the rod-shaped cushioning material 5, and the outer periphery of the sheet 6 is fixed at a plurality of positions at regular intervals. The tape 9 is circulated. The internal mounting member 4 is in contact with the inner surface of the bamboo piece 1 of the bamboo sword through the double-sided tape 10.

  2 to 5 show an assembling method of the internal mounting member for bamboo swords according to the present invention. 2 shows a relaxation material, FIG. 3 shows a state in which a sheet is wound around the relaxation material, FIG. 4 shows a state in which a winding tape is wound around the sheet surface, and FIG. 5 shows a double-sided tape provided on the sheet surface. The perspective view of a state is shown.

  First, as shown in FIG. 2, a rod-shaped relaxation material 5 is prepared. The cross section of the relaxation material 5 is preferably matched to the cross sectional shape of the internal space of the tip portion of the bamboo sword.

  Next, the sheet 6 is wound several times in the axial direction with the sheet 6 having a length of the rod-shaped moderating material 5 or longer than that. The longer one can prevent separation and scattering from the end of the moderating material 5. FIG. 3 shows a state after winding.

  Next, as shown in FIG. 4, the winding tape 9 is wound around the surface of the sheet 6. In the case of the sheet 6 having adherence including self-adhesion, this step may be omitted.

  Next, the double-sided tape 10 is provided on the surface of the sheet 6. In addition, as shown in FIG. 5, if it provides so that the winding end part of the sheet | seat 6 may be straddled, the winding stop tape 9 can be omitted.

  FIG. 6 shows a cross-sectional perspective view of the state in which the internal mounting member 4 is mounted in the internal space of the bamboo sword. It is preferable that the double-sided tape 10 is provided at four positions so as to match the position of the bamboo sword 1 of the bamboo sword, so that the double-sided tape 10 can be prevented from bleeding from the gaps between the bamboo sword 1 of the bamboo sword.

  DESCRIPTION OF SYMBOLS 1 ... Bamboo piece, 2 ... Tip rubber, 3 ... Tip skin, 4 ... Internal mounting member, 5 ... Relaxation material, 6 ... Sheet | seat, 7 ... First section, 8 ... Middle fork, 9 ... Anti-winding tape, 10 ... Double-sided tape

Claims (6)

  A bamboo sword equipped with an internal mounting member having a rod-shaped cushioning material and a sheet wound around the side surface of the rod-shaped cushioning material in the interior space of the bamboo sword.   An internal mounting member for a bamboo sword, which has a rod-shaped relaxation material and a sheet wound so as to wrap the side surface of the rod-shaped relaxation material used in the internal space of the bamboo sword.   The bamboo sword according to claim 1 or the bamboo sword internal mounting member according to claim 2, wherein a winding tape that is wound around a plurality of places around the outer periphery of the internal mounting member is mounted.   The bamboo sword according to claim 1 or 3, or the internal attachment member for bamboo sword according to claim 2 or 3, wherein a double-sided tape is attached to the surface of the internal attachment member.   5. The bamboo sword according to claim 1, 3, or 4, or the internal attachment member for bamboo sword according to claim 2, 3, or 4, wherein the sheet is wound from 2 to 10 times with a thickness of 5 μm to 30 μm.   The bamboo sword of claim 1, 3, 4, or 5, or the bamboo sword of claim 1, 3, 4, or 5, wherein the winding tape is intermittently wound from 3 to 9 locations in the lengthwise direction of the relaxation material. Or the internal mounting member for 5 bamboo swords.

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