JPH0317356Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a drum head fastening and fixing device for tensioning the drum head on a drum body and adjusting the tension thereof.

(Prior Art) One of the important themes for percussion instruments, especially drums, is to be able to better perform tensioning of the drum head to the drum body and adjustment of the tension, that is, tuning.

Conventionally, when installing a drum head on the butter side and bottom side of a drum body, the drum head is fitted onto each drum body edge by tightening hoops on the butter side and bottom side, respectively.
It has been common practice to adjust the tension of each drum head by tightening a tightening bolt of a tightening fixing device provided independently in each of the tightening hoops.

However, with the above method, the tension of the drum head on the butter side and the bottom side can only be adjusted from each side, so it is extremely complicated to make fine adjustments to the drum head on the bottom side after the drum is installed, which is extremely inconvenient for tuning. There was a problem that.

In order to solve this problem, the present applicant previously proposed a drum head fastening and fixing device disclosed in Japanese Utility Model Application No. 169690/1983. This method is the same as the above method on the butter side, and on the bottom side, a movable element is provided on the drum barrel that rotates by a predetermined angle in the vertical direction by an adjusting screw member extending toward the butter side, and the movable element is attached to the bottom side. This is a combination of arranged fastening bolts. According to this, the tension of the drum head on the bottom side can not only be set from the bottom side by the tightening bolt, but also the movable element can be rotated in the butter side direction by the adjustment screw member arranged on the butter side. The tension was adjusted by pulling the tightening bolt toward the tightening side.

(Problems to be solved by the invention) However, with the above structure, the mechanism is complicated and the number of parts is large, and the butter side fixing device and the bottom side fixing device must be installed separately on the drum body. The number of processing locations was also increasing.

Further, since the tension on the bottom side is adjusted by the correlation between the bottom side tightening bolt and the screwing degree of the adjustment screw member to the movable member, it is not always easy to adjust the tension on the bottom side drum head.

This invention was proposed in view of the above-mentioned problems, and its purpose is to use a simpler structure to adjust the bottom drum head tightening from both the bottom side and the butter side. An object of the present invention is to provide a new drum head fastening and fixing device that can perform the following functions.

(Means for solving the problem) That is, the drum head fastening and fixing device of this invention has a tightening bolt that presses the butter side tightening hoop and a bottom side tightening hoop on a lug fixed to the drum body. In a device in which each drum head is adjustable and tensioned on the drum body by threading a tightening bolt, an inner cylindrical portion is formed in the butter side tightening bolt, and an upper portion is attached to the inner cylindrical portion. A key rod member is provided to pass through the key rod member, the side of which is configured as an operating section, and the lower side of which is configured as an engaging section that engages with a fitting section in the bottom side tightening bolt, and the butter is removed by rotation of the key rod member. It is characterized in that the bottom side tightening bolt can be rotated from the side.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings. Figure 1 of the attached drawings is a side view of a drum head fastening device, which is an embodiment of this invention, showing how it is attached to a drum, Figure 2 is a partially cutaway sectional view of the device, and Figure 3 shows a key rod. A cutaway sectional view of the main part showing how the member is held on the butter side tightening bolt, Figure 4 is an end view at the 4-4 position in Figure 2, and Figure 5 is an end view at the 5-5 position in Figure 2. FIG.

As shown in FIGS. 1 and 2, a butter side drum head 13 serving as a striking surface is fitted into the upper side of the body wall member 10 of the drum D with a tightening hoop 11, and a bottom side drum head 14 is fitted on the lower side. It is fitted and stretched by a tightening hoop 12.

The drum head tightening and fixing device 20 includes a tightening bolt 30 for tightening the butter side tightening hoop 11 on a lug 21 fixed to the body wall member 10, and a tightening bolt 30 for tightening the bottom side tightening hoop 12. bolt 4
0 is screwed onto the drum body so that each drum head 13, 14 is tensioned on the drum body so that its tension can be adjusted freely. Numerals 16 and 17 in the figure are fixing members for the lug 21, 19 is a tightening collar for the tightening bolt, and 3
Reference numeral 1 indicates an operating section for the butter side tightening bolt, and 41 indicates an operating section for the bottom side tightening bolt.

In particular, an inner cylindrical portion 34 is formed inside the butter side tightening bolt 30 (see FIG. 4).
A key rod member 50 having an upper portion configured as an operating portion 51 and a lower portion configured as an engaging portion 55 is provided through the inner cylinder portion 34 .

This key rod member 50 is also shown in FIGS. 3 and 4.
As can be understood from the figure, collar parts 52 and 53 are formed at the lower part of the operating part 51. The flanges 52 and 53 are locked by pins 32 screwed onto the butter-side tightening bolts 30 and are rotatably held within the inner cylindrical portion 34. 20, so as not to be desorbed.

The engaging portion 55 has a hexagonal rod shape, and as can be understood from FIG.
It is configured to engage with a fitting portion 44 made of a square hole. Further, even before tightening, the butter side and bottom side tightening bolts 30, 40 have a length that allows the above-mentioned engagement to be achieved even at the positions where the butter side and bottom side tightening bolts 30, 40 are screwed onto the lug 21.

In addition, in this embodiment, in consideration of the convenience of tuning, adjustment from the butter side is performed using the operating section 31 of the butter side tightening bolt and the operating section 51 of the key rod member.
Each drum head is tightened by rotating clockwise. Therefore, the threaded portion 35 of the butter side tightening bolt has a right-handed thread, and the threaded portion 45 of the bottom-side tightening bolt has a left-handed thread. code 2
5 is a mark provided on one side of the lug 21 for identifying the screw direction.

Further, as shown in FIG. 2, a spring body 60 is installed between the butter side tightening bolt 30 and the bottom side tightening bolt 40, and always urges each of the tightening bolts in the outward direction. This prevents loosening after adjustment.

(Effects) As shown and explained above, according to this invention,
A key rod member having an operating part on the upper side and an engaging part that engages with the fitting part in the bottom side tightening bolt on the lower side is provided in the inner cylinder part formed in the butter side tightening bolt. By having a penetrating structure, the structure is much simpler than conventional fastening and fixing devices, and there are fewer parts, making it possible to adjust the tension of the butter side drum head from the butter side and the tension adjustment of the bottom side drum head from the butter side. Now you can easily do it not only from the bottom side but also from the butter side.

In addition, with this invented mechanism, the bottom side adjustment is performed only by the screwing condition of the bottom side bolt to the lug, making it easier to handle than the conventional mechanism in which the screwing condition of two screw members is related to each other. It's summery.

In this way, according to this invention, it is possible to adjust the bottom drum head from both the butter side and the bottom side, and final tuning can be performed from the butter side at any time even after it is installed at the performance location. . Therefore, for drums whose pitch can be changed by subtle adjustments, it has become easier and more perfect to create a sound that matches the player's sound preferences.

[Brief explanation of the drawing]

Fig. 1 is a side view of a drum head fastening device, which is an embodiment of this invention, showing how it is attached to a drum, Fig. 2 is a partially cutaway sectional view thereof, and Fig. 3 is a key rod member butterfly. A cutaway sectional view of the main part showing how it is held on the side fastening bolt, Fig. 4 is an end view at the 4-4 position in Fig. 2, and Fig. 5 is an end view at the 5-5 position in Fig. 2. It is. 10... Trunk wall member, 11... Butter side tightening hoop, 12... Bottom side tightening hoop, 13, 14...
...Drum head, 20...Drum head tightening and fixing device, 21...Lug, 30...Butter side tightening bolt, 31...Operation section, 34...Inner cylinder section, 40...
...Bottom side tightening bolt, 41...Operation unit, 44...
...fitting part, 50...key stick member, 51...operation part, 55...engaging part, D...drum.

Claims (1)

[Scope of utility model registration request] The tightening bolts that tighten the butter side tightening hoop and the tightening bolts that tighten the bottom side tightening hoop are screwed onto the lugs fixed to the drum body, and each drum head is tensioned freely on the drum body. An inner cylindrical part is formed in the butter side tightening bolt, and an upper side of the inner cylindrical part is configured as an operating part, and a lower side engages with a fitting part in the bottom side tightening bolt. A drum head fastening device characterized in that a key rod member configured as an engaging portion is provided through the drum head, and rotation of the key rod member allows the bottom side tightening bolt to be rotated from the butter side. Fixation device.