JP2010160244A - Linking structure of rotary shaft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a male screw member which regulates the relative movement of a cylindrical body and an insertion body from becoming loosed. <P>SOLUTION: A linking structure 23 includes the cylindrical body 24 extending between a pair of rotary shafts 15 and 21; a pair of insertion bodies 25 inserted from both ends of the cylindrical body 24; a pair of linking sections 26 and 26 for linking the insertion bodies 25 and the rotary shafts 15 and 21; and the male screw member 28, which regulates the relative movement of the cylindrical body 24 and the insertion body 25, by being screwed from the outer peripheral side of the cylindrical body 24. The torque of one rotary shaft 21 is transmitted to the other rotary shaft 15, by linking each of the rotary shafts 15 and 21. A receiving member 29, having a hole 29A in the inside, is inserted into the tip side of the male screw member 28. The inside diameter D1 of the hole 29A, prior to the receiving member 29 being inserted into the male screw member 28, is formed smaller than the outside diameter D2 of the male screw member 28. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotating shaft connecting structure, and more particularly to a rotating shaft connecting structure capable of transmitting torque of one rotating shaft to the other rotating shaft via a cylindrical body.

  Conventionally, drum foot pedals have been widely used to play bass drums. The foot pedal can hit the hitting surface of the bass drum by rotating the drum beater by depressing the foot board, and the foot board and the drum beater are connected via a rotating shaft. Here, for example, as shown in Patent Document 1, there is known a double foot pedal capable of operating two drum beaters with both left and right feet with respect to a single bass drum. In such a double foot pedal, the foot pedal closer to the bass drum has two drum beaters, and the rotating shaft that rotates one drum beater is connected to the rotating shaft of the foot pedal far from the bass drum. Connected through structure. This connection structure includes a cylindrical body that extends between the rotation shafts, an insertion body that is connected to each rotation shaft and is inserted into both ends of the cylindrical body, and is screwed from the outer peripheral side of the cylindrical body. And a male screw member that presses and fixes the insert to the inner surface of the body.

US Pat. No. 5,994,635

However, Patent Document 1 has a disadvantage that the male screw member is easily loosened during performance, and the drum beater cannot be rotated even if the insert board is idled in the cylindrical body and the food board is operated. Invite you. This is due to the fact that in the same document, there is no structure for preventing the male screw member from loosening during performance.
In this document, an elastic seat plate is provided to prevent the male screw member from spinning around. However, this elastic member only prevents idle rotation of the male screw member remaining in the cylindrical body separated from the insertion body by carrying or the like, and does not contribute to prevention of loosening of the male screw member during performance.

[Object of invention]
The present invention has been devised on the basis of the inconveniences described above, and its purpose is to rotate the male screw member that restricts the relative movement between the cylindrical body and the insert during performance, etc., and can be prevented from loosening. It is to provide a shaft connection structure.

In order to achieve the above object, the present invention relates to a rotating shaft connecting structure for connecting a pair of rotating shafts for connecting a foot pedal of a bass drum and transmitting torque of one rotating shaft to the other rotating shaft. In
A cylindrical body extending between the rotating shafts, a pair of insertion bodies inserted from both ends of the cylindrical body, a pair of connecting portions connecting the insertion body and the rotating shaft, and the cylindrical body A male screw member that regulates relative movement between the cylindrical body and the insertion body by screwing from the outer peripheral side;
A receiving member having a hole therein is inserted into the distal end side of the male screw member, and the inner diameter of the hole before the receiving member is inserted into the male screw member is formed smaller than the outer diameter of the male screw member. Adopted.

  In this invention, it is preferable that the said receiving member is comprised using resin.

According to the present invention, when the male screw member is screwed and inserted into the hole of the receiving member, the distal end side of the male screw member receives the tightening force by the receiving member. Therefore, when the male screw member tries to rotate in the loosening direction, a frictional resistance is generated between the male screw member and the male screw member, and it is possible to suppress inadvertent loosening of the male screw member. As a result, it is possible to prevent the insertion body from inadvertently spinning around in the cylindrical body when the rotating shaft rotates, and when the present invention is used for a double foot pedal for drums, Therefore, it is possible to maintain good performance by avoiding the malfunction of the.
Moreover, even after the insertion body is extracted from the cylindrical body, the state where the male screw member is inserted into the hole of the receiving member can be maintained. Accordingly, the male screw member is attached to the cylindrical body with the receiving member serving as a stopper, and it is possible to avoid the male screw member from being accidentally dropped from the cylindrical body.

  Moreover, when a receiving member is comprised using a resin material, the said clamping force can be exhibited better.

The partial schematic front view of the double foot pedal which concerns on embodiment with which the connection structure of this invention was applied. (A) is the fragmentary front sectional view which expanded the principal part of FIG. 1, and (B) is the exploded view of (A).

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
The direction or positional terms in this specification are based on FIGS. 1 and 2 unless otherwise specified.

  FIG. 1 is a partial schematic front view of a dual foot pedal to which the holding structure of the present invention is applied. In this figure, a double-type foot pedal 10 includes a first foot pedal 11 located on the left side in the figure and a second foot pedal 12 located on the right side in the figure.

  The first foot pedal 11 includes a rotary shaft 15 that is rotatably supported by the frame 14, and a biasing means 16 that is provided between the frame 14 and the rotary shaft 15 and pulls the rotary shaft 15 downward. I have. A drum beater (not shown) is connected to the rotating shaft 15, and the drum beater can be rotated by the rotation of the rotating shaft 15 to hit the bass drum. A rotating shaft (not shown) is rotatably provided on substantially the same axis as the rotating shaft 15, and a drum beater and a foot board (not shown) separate from the drum beater are connected to the rotating shaft. . Therefore, the first foot pedal 11 includes two drum beaters, and the separate drum beater is connected to the rotary shaft 15 by the stepping operation of the foot board. It is designed to rotate independently.

  The second foot pedal 12 includes a rotating shaft 21 that is rotatably supported by the frame 20, and a foot board (not shown) connected to the rotating shaft 21. The rotating shaft 21 of the second foot pedal 12 is connected to the rotating shaft 15 of the first foot pedal 11 via a connecting structure 23.

  2A and 2B, the connection structure 23 is inserted from a cylindrical body 24 extending between the rotary shafts 15 and 21, and from both left and right ends of the cylindrical body 24. A pair of inserts 25, 25 forming a shaft shape, a pair of connecting portions 26, 26 connecting the inserts 25, 25 and the rotary shafts 15, 21, and the outer periphery of the cylindrical body 24. And a receiving member 29 provided on the leading end side of the male screw member 28.

  Each of the connecting portions 26 is connected to one end of the insert 25 so as to displace the relative angle between the insert 25 and the rotary shafts 15 and 21, and the rotation received by the joint 31. A fixing screw 32 for fixing the shafts 15 and 21 is provided.

  The male screw member 28 is provided on the upper surface side of the cylindrical body 24 so as to be screwed into a screw hole 24A formed along the vertical direction. The male screw member 28 presses the insertion body 25 against the inner surface of the cylindrical body 24 at its tip by screwing, thereby restricting relative movement between the cylindrical body 24 and the insertion body 25. The insertion body 25 is formed of a polygonal rod such as a hexagonal cross section so that it does not rotate within the cylindrical body 24, and the contact portion of the male screw member 28 is a flat surface.

  The receiving member 29 is made of resin and has a washer shape having a hole 29A therein, and the male screw member 28 is inserted into the hole 29A. In the initial shape before the male screw member 28 is inserted, the inner diameter D1 of the hole 29A is formed smaller than the outer diameter D2 of the region of the male screw member 28 where the screw groove is provided.

  Next, a procedure for connecting the rotary shafts 15 and 21 by the connecting structure 23 will be described.

  First, the joint portion 31 of the connecting portion 26 is attached to each of the rotary shafts 15 and 21, and the joint portion 31 is fixed to the rotary shafts 15 and 21 by screwing the fixing screw 32. Next, the insertion body 25 connected to the joint portion 31 is inserted from both left and right ends of the cylindrical body 24. At this time, the distance between the first and second foot pedals 11 and 12 can be adjusted by changing the insertion length of the insertion body 25.

  In this state, the male screw member 28 is screwed into the screw hole 24A while the receiving member 29 is disposed below the screw hole 24A inside the cylindrical body 24. Thereby, the front end side of the male screw member 28 is inserted while expanding the diameter of the hole 29A of the receiving member 29, and the male screw member 28 is tightened by the receiving member 29 and receives frictional resistance against the screwing. The male screw member 28 is further screwed against this frictional resistance, and the insert body 25 is pressed downward by the tip of the male screw member 28 to sandwich the insert body 25 between the inner surface of the cylindrical body 24. Thereby, in addition to the movement in the direction in which the insertion body 25 comes out of the cylindrical body 24, the rotational movement in which the insertion body 25 idles in the cylindrical body 24 can be restricted, and the respective rotary shafts 15 and 21 are connected to each other. The torque of the rotary shaft 21 of the foot pedal 12 can be transmitted to the rotary shaft 15 of the first foot pedal 11. Therefore, when the foot board of the second foot pedal 12 is depressed, the rotating shaft 15 of the first foot pedal 11 is rotated via the rotating shaft 21 and the connecting structure 23, and the drum beater connected to the rotating shaft 15 is rotated. Can be turned.

Since the male screw member 28 is tightened by the receiving member 29 in a state where the movement of the insertion body 25 is restricted in the cylindrical body 24, even if the male screw member 28 tries to rotate in the loosening direction, the rotation is received by the male screw member 28. It can control by the frictional resistance between the members 29.
Thereby, the looseness of the male screw member 28 can be prevented and the sandwiching of the insert 25 can be maintained firmly. During the performance, the torque is not transmitted between the rotary shafts 15 and 21, or the torque is not transmitted sufficiently. It becomes possible to prevent becoming.

  Even after the male screw member 28 is intentionally loosened and the insertion body 25 is extracted from the cylindrical body 24, the distal end of the male screw member 28 is tightened by the receiving member 29, and the receiving member 29 is inserted into the distal end side. The maintained state can be maintained. Thereby, it is possible to prevent the male screw member 28 from inadvertently dropping from the screw hole 24A, and it is possible to avoid the loss of the male screw member 28 when carrying out the transportation by releasing the connection by the connection structure 23. Become.

As described above, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this.
In other words, the present invention has been illustrated and described mainly with respect to specific embodiments, but without departing from the scope of the technical idea and object of the present invention, the shape, position, or With respect to the arrangement and the like, those skilled in the art can make various changes as necessary.
Therefore, the description limited to the shape disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded one part or all part is included in this invention.

  For example, the number of male screw members 28 may be increased by arranging a plurality of male screw members 28 in the axial direction or the circumferential direction of the insert 25.

  Further, the connecting structure 23 may be applied to another device having a configuration for transmitting torque by connecting a pair of rotating shafts.

  DESCRIPTION OF SYMBOLS 15,21 ... Rotating shaft, 23 ... Connection structure, 24 ... Cylindrical body, 25 ... Insert, 26 ... Connection part, 28 ... Male screw member, 29 ... Receiving Member, 29A ... hole

Claims (2)

In a connecting structure of rotating shafts for connecting a pair of rotating shafts for connecting a bass drum foot pedal and transmitting torque of one rotating shaft to the other rotating shaft,
A cylindrical body extending between the rotating shafts, a pair of insertion bodies inserted from both ends of the cylindrical body, a pair of connecting portions connecting the insertion body and the rotating shaft, and the cylindrical body A male screw member that regulates relative movement between the cylindrical body and the insertion body by screwing from the outer peripheral side;
A receiving member having a hole therein is inserted into the distal end side of the male screw member, and an inner diameter of the hole before the receiving member is inserted into the male screw member is formed smaller than an outer diameter of the male screw member. The rotating shaft connection structure.   The rotating shaft coupling structure according to claim 1, wherein the receiving member is made of resin.

Images