JP3105970U - drum - Google Patents

Abstract

【Task】
Provide inexpensive and highly reverberant drums.
[Solution]
A trunk outer member made of a plywood formed in a substantially cylindrical shape, a thin plate of a plurality of cedars or the like superimposed on the inner surface of the trunk outer member, and rigidity provided around both end portions of the trunk outer member. A drum is constituted by a skin portion having a ring, and a string body which is alternately hooked on a hole provided in the skin portion and continuously binds the skin portion, and is superposed on the inner surface of the outer trunk member. The joining portions of the thin plates made of a plurality of cedar materials and the like were each formed as a bad joining portion.

[Selection diagram] Fig. 1

Description

  The present invention relates to a drum, and more particularly to a drum that is inexpensive and has a high reverberation effect.

  Conventional drums use a so-called one-piece barrel made by hollowing out the inside of a rounded tree trunk and processing it into a tube. What stopped is the mainstream.

  However, the drum barrel of the above-mentioned conventional drum is hollowed out in the trunk of a tree and made into a cylindrical shape, and requires special equipment for processing.Moreover, after processing into a cylindrical shape, depending on the material of the tree, It required a long time and a high cost, such as requiring natural drying for one to two years. Moreover, since the wood used is a natural wood such as a plug, camphor tree or ash, there is a problem that the number of woods that can be used as a drum drum for environmental protection is limited. Also, in order to produce the original reverberation effect of a drum, skilled processing techniques by hand were required.

  In order to solve these problems, a cylindrical body is integrally formed with a synthetic resin such as PVC, and leather plates are connected to the openings on both sides, and the leather is continuously tied up with a single rope. A synthetic resin drum has been proposed (see Patent Document 1). Also, a narrow material is formed by laminating a surface material on a core material laminated with a thin plate material set to a predetermined width dimension, and the narrow material is curved at a predetermined curvature along a longitudinal direction, By connecting a plurality of narrow members to each other via a connecting means comprising an umbilical groove provided along both longitudinal side edges of the curved narrow member and an umbilical member fitted therein, a trunk portion is formed. Forming a forming member, and then connecting the body forming member in the circumferential direction through the same connecting means as described above to form a polygonal barrel-shaped barrel; and further, the polygonal barrel-shaped barrel-shaped body There is also a Japanese drum that finishes the outer surface of the drum and forms a striking surface by stretching the skin in the opening (see Patent Document 2).

Japanese Utility Model Publication No. 56-60987 JP 2004-86117 A

  However, the drum described in Patent Document 1 has a feature that a cylindrical body is integrally formed of a synthetic resin such as vinyl chloride, which is suitable for mass production and cheaper than wood. Unlike a wooden torso, there is a problem that the original sound of a drum cannot be produced and a satisfactory one cannot be obtained.

  Also, in the Japanese drum described in Patent Document 2, a narrow material is formed by laminating a surface material on a core material in which a thin plate material set to a predetermined width is laminated, and further a narrow material is formed. It is necessary to form an umbilical groove and umbilical material on both side edges in the longitudinal direction of the body, and there is a problem that its production requires expensive manufacturing equipment and complicated technology. Although a plurality of sound guide members are provided along the inner surface in the direction, a rod-shaped member whose cross-sectional shape is set to a curved overhang shape is required, and there is a problem that its manufacture is complicated and costly. .

  The present invention has been made in view of the above-described problems, and is inexpensive because it does not use expensive dedicated manufacturing equipment and does not require a long time for manufacturing. An object of the present invention is to provide a drum having a high reverberation effect without requiring any processing technology.

  For this reason, the present invention relates to a trunk outer member made of a plywood formed in a substantially cylindrical shape, a plurality of cedar or other thin plates superimposed on the inner surface of the trunk outer member, and two side ends of the trunk outer member. The first feature is that the skin portion is provided with a skin portion provided with a rigid ring around it, and a string body which is alternately hooked on a hole provided in the skin portion and continuously binds the skin portion. .

  A second feature is that the joints of a plurality of thin plates made of cedar or the like superimposed on the inner side surface of the outer body member each form a bad joint.

Since the drum of the present invention is configured as described above, it has the following excellent effects.
(1) Since the drum drum is made of inexpensive materials such as plywood and cedar, it does not require dedicated equipment for cutting out wood and does not require long drying time. It has the effect of being able to be manufactured at low cost, and it is easy to secure materials because it is not made of a single tree using natural wood such as plugs, camphor trees or ash, and contributes to environmental protection because it does not use a large amount of the natural wood. There is an excellent effect that it can be done.
(2) The joints of a plurality of thin plates, such as cedar, superimposed on the inner surface of the trunk outer member form pad joints, and are formed in the circumferential direction and the longitudinal direction of the inner surface. Fine irregularities are formed at the bad joints, and there is an effect that the reverberation effect of the drum can be exerted without requiring a skillful processing technique.

Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings.
FIG. 1 is a perspective view showing an embodiment of the drum according to the present invention, FIG. 2 is a front sectional view of FIG. 1, and FIG. 3 is an explanatory view showing a manufacturing process of the drum drum of the present invention.

  As shown in FIG. 1 and FIG. 2, the drum 1 of the present invention includes a trunk outer member 9 made of plywood formed in a substantially cylindrical shape, and a plurality of cedar materials and the like superposed on the inner surface of the trunk outer member 9. The thin plate 10, the skin portions 3 provided at both end portions of the body outer member 9 and having the rigid ring 5 made of a metal such as iron around the skin portion 3, and the hole portions 6 provided in the skin portion 3 are alternately hooked on the skin portions 3. And a string 4 for continuously binding the portion 3.

  The body 2 includes a body outer member 9 made of plywood such as a 4.5 mm thick plywood material as described later, and a thin plate made of a plurality of 3 mm thick cedar materials and the like superposed on the inner surface of the body outer member 9. 10 and has a substantially cylindrical shape. The thin plate 10 made of cedar or the like is referred to as a sword plate and is used as a base of a tile, and is easily bent and has excellent durability. The body 2 is made of plywood such as lauan wood and a thin board made of cedar and the like, so that it is inexpensive, and does not require special equipment for processing, and does not require long-time drying, so low cost. Manufactured in. The skin portion 3 is stretched over a metal rigid ring 5, and the rigid ring 5 having a diameter larger than the outer diameter of the body 2 is placed on the skin portion 3, and the periphery of the skin portion 3 along the rigid ring 5. Is folded and sewn to form. Further, holes 6 through which the cords 4 are inserted at predetermined intervals are provided along the inner diameter of the rigid ring 5 of the skin portion 3. The skin material used for the skin portion 3 is preferably cow tanned skin.

  Next, the manufacturing process of the drum drum of the present invention will be described with reference to FIG. In this embodiment, a case having a diameter of 30 cm and a length of 45 cm is taken as an example.

  FIG. 3A is an explanatory view illustrating a state in which a cut portion is formed in a mold, FIG. 3B is an explanatory view illustrating a state in which a trunk outer member is inserted, and FIG. FIG. 3D is an explanatory view showing a state in which the mold is pressed, and FIG. 3E is an explanatory view showing a state in which the mold is removed. First, a notch 7a is formed in a longitudinal direction of a cylindrical PVC pipe mold 7 having an inner diameter of 30 cm and a length of 45 cm by an electric cutter (not shown). Next, the lauan plywood (thickness: 4.5 mm, size: 1.8 mx 0.9 m) is cut into a finished size (diameter: 30 cm, length: 45 cm) to obtain a body outer member 8. Next, an adhesive (not shown) is applied to both ends of the trunk outer member 8 in the grain direction, and the glue-applied trunk outer member 8 is bent on the mold 7 so that the grain is parallel to the longitudinal direction of the mold 7. Then, the side end surfaces of the body outer member 8 are pressure-bonded to each other in the circumferential direction to form a joint 8a, which is formed into a cylindrical shape. At this time, if the joining surface forming the joining portion 8a is chamfered in advance, joining becomes easier. Next, an adhesive is applied to the back and side surfaces of a thin plate 9 made of a cedar material having a thickness of 3 mm. Are arranged in the direction perpendicular to the grain of the trunk outer member 8 in order, and are superposed so that the joints 9a of the respective thin plates 9 are all bad joints. At this point, the overlapping operation is performed so that the joint 8a and the joint 9a do not overlap. Further, if necessary, stapling is performed from the surface of the laminated thin plate 9 by an electric tucker (not shown). Next, the stranded wire 10 or the like is wound around a predetermined position in the circumferential direction of the mold frame 7 and pressed. The shade drying is performed for 1 to 2 weeks while the pressing is performed, and the shell 2 is obtained by removing the caterpillar line 10 and the mold 7. In the present embodiment, the thin plate 9 is laminated on one layer. However, the thin plate 9 may be formed in multiple layers depending on the diameter and length of the drum. Also, the strip wire 10 used for pressing may be a vinyl band or the like, and more preferably a recyclable one.

  The skin portions 3 are applied to both side ends of the body 2 made as described above, and the cords 4 are inserted into the holes 6 and are alternately hooked and continuously tied, and the body 2 and the skin portion 3 are crimped. A drum 1 is configured. By appropriately loosening or tightening the cord body 4, the tension of the skin portion 3 changes and the sound quality also changes. In addition, a plurality of thin plates 9 are superposed on the inner surface of the outer body member 8, and are bonded together to form a joint 9 a, and fine irregularities are formed on the inner surface 9 of the inner surface of the body 2 in a circumferential direction and a longitudinal direction. Increases the reverberation effect.

  As described above, according to the drum of the present invention, the drum drum body is made of inexpensive materials such as plywood and cedar wood. Since no drying time is required, it can be manufactured at low cost. In addition, since it is not made of a single tree using natural wood such as plugs, camphor trees, or ash, it is easy to secure materials, and the natural wood is not used in large quantities, thereby contributing to environmental protection. Further, the joints of a plurality of thin sheets of cedar or the like superimposed on the inner surface of the trunk outer member form a bad joint, and the fine joints are formed on the bad joints in the circumferential direction and the longitudinal direction of the inner surface. Since such irregularities are formed, a reverberation effect similar to that of a sound guide member formed by a skilled processing technique can be reproduced without using a skilled technique.

FIG. 3 is a perspective view showing an embodiment of a drum according to the present invention. FIG. 2 is a front sectional view of FIG. 1. It is an explanatory view showing a manufacturing process of a drum drum of the present invention.

Explanation of reference numerals

REFERENCE SIGNS LIST 1 drum 2 trunk 3 skin 4 string body 5 rigid ring 6 hole 7 formwork 7a cutout 8 trunk outer member 8a, 9a joint 9 thin plate 10

Claims (2)

  A trunk outer member made of a plywood formed in a substantially cylindrical shape, a thin plate of a plurality of cedars or the like superimposed on the inner surface of the trunk outer member, and rigidity provided around both end portions of the trunk outer member. A drum comprising a skin portion having a ring and a cord body which is alternately hooked on a hole provided in the skin portion and continuously binds the skin portion.   2. The drum according to claim 1, wherein joints of a plurality of thin plates made of cedar or the like superimposed on the inner surface of the outer body member each form a bad joint. 3.

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