JP2003216146A - Cord tightening device for drum - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cord tightening device for a drum which can reduce the labor of the work to tighten the cords, more particularly cross cords of the drum and can easily adjust the tightening degrees of the cords. <P>SOLUTION: The device has a drum placing plate 1 adapted to be placed on with the drum 2 in such a manner that one surface of the drum 2 contacts its top surface, means for fixing the drum 2 placed on the placing plate 1, means for strongly winding up the cross cords 5 in the slackened state wound on the outer side of the vertical cords 4 of the drum 2 by strongly pulling the cords while taking up the cords and means for temporally fixing the cross cords 5 so as to maintain the state that the cords are strongly wound up. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum stringing device. 2. Description of the Related Art Conventionally, leather is applied to both sides or one side of a body,
The holes provided along the periphery of the one surface and the holes provided along the periphery of the opposite side are alternately zigzag through the vertical cords to tighten the two surfaces, and furthermore, There is a drum in which the horizontal string is wound around the outer circumference of the vertical string in the circumferential direction of the body and tightened so that the vertical string is not loosened. [0003] And such a stringing work of the drum,
Conventionally, almost all of the work is performed manually, and there is no dedicated lace tightening machine. The above-described manual tightening work is
It was hard work because the string had to be pulled with a strong force so that the string would not loosen, and the tightness of the string was difficult. SUMMARY OF THE INVENTION Accordingly, the present invention can reduce the labor for tightening a drum string, particularly a horizontal string, and can tighten the horizontal string more strongly than by hand. It is another object of the present invention to provide a string tightening device capable of easily adjusting the tightening degree of the string. In order to solve the above-mentioned problems, a drum tying device for a drum according to the present invention has a drum mounted so that the drum 2 can be placed so that one side of the drum 2 is in contact with the upper surface. Table 1
A means for fixing the drum 2 placed on the drum mounting table 1, and a loose horizontal string 5 wound around the vertical cord 4 of the drum 2.
And a means for temporarily fixing the horizontal string 5 so as to maintain the tightly wound state by pulling while pulling. An embodiment of the present invention will be described below with reference to the drawings. The drawings show one embodiment of the present invention, and the present invention is not limited to this embodiment. First, in the drum stringing device of the present invention, the drum placing table 1 is arranged at the center. This drum mounting table 1
, The drum 2 can be placed so that one side of the drum 2 is in contact with the upper surface thereof. In addition, the drum 2 has leather on both sides or one side of the trunk 3, and the vertical cord 4 is attached to a hole provided along the peripheral edge of one side and a hole provided along the peripheral edge of the opposite side. By alternately passing through in a zigzag manner and tightening, tension is given to both sides.
The structure is such that the longitudinal string 4 is not loosened by winding and tightening in the circumferential direction. A positioning rib 6 for the drum 2 can be provided upright on the upper surface of the drum mounting table 1 at a required position. The drum mounting table 1 can be provided on a base table 7 as in the illustrated embodiment. Next, the drum string tightening device of the present invention includes a means for fixing the drum 2 mounted on the drum mounting table 1. As a fixing means of the drum 2, for example, as shown in the illustrated embodiment, a pressing plate 8 capable of holding the center of the upper surface of the drum 2 from above can be used. The holding plate 8 is disposed above the drum mounting table 1, and one end thereof is rotatably attached to the upper end of a column 9 erected on the base table 7, and the other end is free and can be raised and lowered. In addition, a free end can be detachably attached to the upper end of the column 10 which is also erected on the opposite side of the base table 7. As means for detaching the free end of the holding plate 8 from the upper end of the column 10, for example, as shown in the illustrated embodiment (see FIGS. 1 to 3), the holding plate 8
Notch 11 is provided at the free end of
A screw 12 is rotatably attached to the upper end of the
Screw with the free end of the
2 can be raised to penetrate the notch 11 and the nut 13 screwed to the screw 12 on the holding plate 8 can be tightened. Although the illustrated holding plate 8 is straight even when it is not held down, the holding plate 8 is slightly curved so as to swell downward, and the swelling portion is formed on the upper surface of the drum 2. The holding plate 8 is a drum 2
It is preferable that the holding plate 8 is deformed to generate a spring force in a state where the holding plate 8 is held down. Next, the drum string tightening device of the present invention includes a means for pulling and pulling the loose horizontal string 5 wound around the vertical string 4 of the drum 2 while strongly winding it.
As means for winding and pulling the horizontal cord 5, for example, as shown in the illustrated embodiment, a reel 15 attached to the rotating shaft 14 is used.
Can be used. The rotating shaft 14 and the reel 15
As shown in the illustrated embodiment, by providing both sides of the drum mounting base 1 as in the illustrated embodiment, both ends of the horizontal cord 5 can be pulled. Further, it is also possible to provide the rotating shaft 14 and the reel 15 only on one side of the drum mounting table 1 and to pull only one end of the horizontal cord 5. In that case, a fixing portion of the horizontal cord 5 is provided on one side on the opposite side. In addition, the reel 15 can be provided with a notch 16 at its brim portion so that the horizontal cord 5 can be hooked. The rotating shaft 14 is, as in the illustrated embodiment,
The handle 17 can be attached to one end and rotated by manual operation. In order to further increase the tightening force on the horizontal string 5, a tool such as a wrench or a rod serving as a lever can be attached to the handle 17 or the rotating shaft 14 in an auxiliary manner, and the large rotational moment is used. It is also possible to configure so that the rotating shaft 14 can be rotated. Further, the rotating shaft 14 can be rotated by using a motor or the like. The rotation shaft 14 can be provided with a reverse rotation prevention mechanism. As a mechanism for preventing the rotation of the rotating shaft 14, for example, as shown in the illustrated embodiment (particularly, see FIG. 4), the gear 18 attached to the rotating shaft 14 and the direction in which the rotating shaft 14 pulls and winds the horizontal cord 5. When rotating, the rotation of the rotating shaft 14 can be continued without engaging with the teeth of the gear 18, but when the rotating shaft 14 tries to rotate in the opposite direction, it engages with the teeth of the gear 18 to engage with the rotating shaft 14. Claw 1 that can prevent rotation
9 can be used. Next, the drum string tightening device of the present invention includes means for temporarily fixing the horizontal string 5 so as to maintain a tightly wound state. As a temporary fixing means of the horizontal cord 5, for example, as in the illustrated embodiment (particularly, see FIG. 5),
A clip 20 can be used. This clip 20
Comprises two sandwiching plates 21 which can sandwich the horizontal cord 5 therebetween,
A configuration using a bolt 22 and a nut 23 capable of tightening both ends of the sandwiching plate 21 can be adopted. Next, the procedure for tightening the horizontal cord 5 of the drum 2 will be described. First, the drum 2 is mounted on the drum mounting table 1. Note that the drum 2 has the vertical string 4 tightened, and the horizontal string 5 is loosely wound around the outside of the vertical string 4. The drum 2 is mounted so that one side thereof contacts the upper surface of the drum mounting table 1. If the positioning ribs 6 are provided as described above, the drum 2 can be set at an appropriate position. Next, the drum 2 is fixed by fixing means.
In the case of the above embodiment, the holding plate 8 is tilted sideways and the drum 2
After placing the free end of the holding plate 8 on the upper end of the column 10, raise the screw 12 attached to the upper end of the column 10 to penetrate the notch 11 of the holding plate 8, Nut 1 screwed on screw 12 on plate 8
3 should be tightened. Next, the horizontal cord 5 of the drum 2 is wound and connected to a pulling means, and is pulled while being wound. In the case of the above embodiment, both ends of the horizontal string 5 wound around the outer side of the vertical string 4 are crossed and extended to opposite sides, and the ends thereof are cut into the notches 16 of the reels 15 arranged on both sides of the drum mounting table 1 respectively. After being locked and wound around the reel 15, the handle 17 is rotated by manual operation, so that the rotating shaft 14 and the reel 15 are integrally rotated, and while the horizontal cord 5 is wound around the reel 15, it is gradually pulled and pulled. Next, tighten the horizontal string 5. In this case, if the mechanism for preventing the rotation of the rotating shaft 14 is provided as described above, the slack of the horizontal cord 5 can be prevented when the operation of rotating the handle 17 manually is temporarily stopped. Next, the horizontal string 5 is temporarily fixed in a state where the degree of tightening with respect to the horizontal string 5 is appropriate. In the case of the above embodiment, the horizontal cord 5 is connected to the two sandwich plates 2
1, the both ends of the sandwiching plate 21 may be fastened with bolts 22 and nuts 23. Next, as described above, the horizontal cord 5 is temporarily fixed so as not to be loosened, and a proper tightening state is maintained.
The both ends of the horizontal cord 5 are wound and removed from the pulling means. In the case of the above embodiment, the horizontal string 5 may be removed from the reel 15. Next, the fixing means of the drum 2 is removed to make the drum 2 free. In the case of the above embodiment, the nut 13
Then, the screw 12 is pulled out from the notch 11 of the holding plate 8 by loosening the screw 12 and the free end of the holding plate 8 is set free to raise the holding plate 8. Next, with the temporary fixing means attached to the horizontal string 5, the both ends of the horizontal string 5 are tied off, and then the temporary fixing means is removed. In the case of the above embodiment, both ends of the horizontal cord 5 are tied with the clip 20 still attached, and then the clip 20 is removed. Thus, the tightening work of the horizontal cord 5 of the drum 2 is completed. As described above, the apparatus for tightening a drum of the present invention uses the horizontal string 5 of the drum 2 which has been conventionally manually operated.
Can be performed using a machine, so that labor can be considerably reduced as compared with the related art. Further, the horizontal string 5 can be tightened much more strongly than manually. Further, the degree of tightening of the horizontal cord 5 can be easily adjusted by operating the handle 17 or the like.

[Brief description of the drawings] FIG. 1 is a plan view. FIG. 2 is a front view. FIG. 3 is a view taken in the direction of arrows along the line AA in FIG. 1; FIG. 4 is a sectional view taken along line BB of FIG. 1; FIG. 5 is a perspective view of a clip. [Explanation of symbols] 1 Drum mounting table 2 drums 3 torso 4 vertical string 5 side string 6 Positioning rib 7 Base table 8 Holding plate 9 props 10 props 11 Cut 12 screws 13 nuts 14 Rotary axis 15 reel 16 Cut 17 Handle 18 gears 19 claws 20 clips 21 sandwich plate 22 volts 23 nut

Claims (1)

Claims 1. A drum mounting table 1 on which a drum 2 can be mounted so that one side of the drum 2 contacts an upper surface, and a drum 2 mounted on the drum mounting table 1 are fixed. Means, means for pulling the loose horizontal string 5 wound on the outside of the vertical string 4 of the drum 2 while pulling it up, and strongly tightening the horizontal string 5, and temporarily fixing the horizontal string 5 so as to maintain the strongly tightened state. And a stringing device for a drum.