JP6089717B2 - Foot pedal - Google Patents

Description

  The present invention relates to a musical instrument foot pedal for playing a drum, a hi-hat cymbal or the like by a player's stepping operation.

  Conventionally, this type of foot pedal has a pedal frame and a chain that is pivotally supported by a support portion provided at the rear end side of the pedal frame and connected to the front end side by a player's stepping operation. It consists of a footboard that operates drums and hi-hat cymbals via a belt. For example, in the case of a drum, the operating member is connected to a beater that strikes the drum, and in the case of a hi-hat cymbal, it is connected to an operating rod that moves the cymbal. Such a foot pedal operated by a musical instrument player is required to have a smooth and play-free pivotability. For this reason, ball bearings are attached to the pair of left and right support parts on the rear end side of the pedal frame, the shaft body is fixed to the rear end part of the footboard, and the shaft part protruding left and right from the rear end part of the footboard of the shaft body is fixed. There has been proposed one pivotally supported by the ball bearing (see Patent Document 1).

  By the way, in the case of a structure using such a bearing, slipping (creep) is prevented on the fitting surface between the shaft portion on the footboard side that receives a direct load from the player and the inner ring of the ball bearing on the support portion side. A tightening margin is necessary. In order to provide a tightening margin, it is only necessary to press-fit the bearing into the shaft, but because of the structure, it is necessary to press-fit the bearing with the footboard and the pedal frame assembled with the shaft, which is not practical and impractical. . Therefore, in Patent Document 1, the bearing mounting hole of the support portion is a stepped hole having a step portion to which the bearing outer ring is locked, and a step portion in which the bearing inner ring is locked to the left and right shaft portions of the shaft body and its step A male threaded part for attaching a nut to the tip side is provided, and a bearing is attached to the shaft part of the shaft body and tightened with a nut from the outside, so that the bearing inner ring is sandwiched between the step part of the shaft part and the nut. At the same time, the bearing outer ring is sandwiched between the stepped portion of the mounting hole and the nut.

  However, in such a structure, the position of the step portion of the shaft portion and the position of the step portion of the mounting hole are related to each other, and extremely high processing / forming accuracy is required. For example, if the position of the step portion of the shaft portion is shifted inward from the setting relative to the position of the step portion of the mounting hole, the inner ring of the bearing cannot be fixed to the shaft portion even if the nut is tightened, and slipping occurs or the shaft is Unreasonable force in the direction is applied, and smooth rotation is not possible. On the other hand, if it shifts to the outside, a gap is generated between the outer ring and the step portion on the mounting hole side, and the bearing cannot be fixed to the mounting hole without play. Even if this gap is small, the backlash of the footboard on which a complicated load whose size, timing, and direction are not constant will increase. Therefore, as described above, extremely high accuracy is required, and a certain limit is imposed on the improvement of productivity.

  Moreover, in patent document 1, it is set as the structure which supports the axial part which protrudes in the left-right direction from the base end part of the footboard which receives a load by the bearing of the support part of a pedal frame right and left, respectively. If the shaft part protruding in a cantilever shape is not strong enough, it may bend due to long-term use. In particular, it is configured to lock the bearing outer ring to the stepped part of the mounting hole. The shaft is supported at a position away from the base end, and the shaft may bend and cause backlash or damage to the bearing. There was a problem that became narrow.

Japanese Patent Laying-Open No. 2011-39506 (FIG. 6)

  Therefore, in view of the above-mentioned situation, the present invention intends to solve the problem that the footboard is smooth and has no looseness, good durability, and good workability in assembling the footboard and the pedal frame. Thus, it is not a structure that requires extremely high processing / molding accuracy for each part, but a point of providing a foot pedal for a musical instrument that has a high degree of freedom in design, and that can improve productivity and reduce costs.

  In order to solve the above-mentioned problems, the present invention has a pedal frame and a base end portion rotatably supported by a support portion provided on the rear end side of the pedal frame, and is connected to the front end side by a player's stepping operation. A foot pedal for a musical instrument comprising a foot board for operating a musical instrument through an actuated member, wherein the base end portion of the foot board is provided with a mounting hole penetrating in the left-right and left-right directions, Radial rolling bearings are fixed to the inner peripheral surfaces of both ends, respectively, and the support portions of the pedal frames are provided at positions on the left and right outer sides of the base end of the footboard, respectively, and the base end of the footboard is provided. The mounting holes to be provided and shaft bodies that pass through the respective rolling bearings fixed to the mounting holes are provided, and both end portions of the shaft bodies are fixed to the left and right support portions of the pedal frame, respectively. The base end portion of the foot board, and constitute the erection has been foot pedal for musical instruments obtained by rotatably supported by the shaft body between the support portion of the pedal frame through the rolling bearing.

  Here, it is preferable that the rolling bearing is a roller bearing, and it is further preferable that the rolling bearing is a needle bearing.

  Further, it is preferable that a thrust washer through which the shaft body is inserted is interposed between the base end portion of the footboard and the support portion of the pedal frame.

  Furthermore, it is preferable that the attachment hole provided in the said base end part of a footboard consists of a straight hole which does not have a small diameter step part for latching a rolling bearing.

Moreover, the support hole penetrating laterally to the support part of the pedal frame is provided, on the inside of the support hole, a bottom or scan spacers member having a bottomless insertion hole of the end portion of the shaft body is inserted It is preferable to fix the end of the shaft body through a pin.

  In particular, a threaded hole that is open on the lower surface side of the pedal frame and communicates with the inside of the support hole is provided, and a side wall portion of the spacer member is opened at a position corresponding to the threaded hole and the insertion hole A shaft body provided with a through hole or a screw hole communicating with the inside of the pedal frame and inserted into the support hole through the support portion of the pedal frame and the side wall portion of the spacer member by a male screw attached from the lower surface side of the pedal frame It is preferable that the shaft body is fixed to the inside of the support hole of the pedal frame through a spacer member by pressing the end portion of the pedal frame upward.

  In addition, the insertion hole of the spacer member is a hole with a bottom, and is provided with a threaded hole that penetrates from the bottom to the outside along the axial direction. By screwing a screw and pressing the end face of the shaft body inside the insertion hole, the shaft body or spacer member is moved inward or outward along the axial direction with respect to the support hole, and is detached from the support hole. Those are preferred.

  The foot pedal according to the present invention as described above has a radial rolling bearing fixed to a mounting hole on the foot board side that receives a load from the performer, and a shaft body that is installed between the left and right support portions of the pedal frame. Since the footboard is pivotally supported via the rolling bearing, a tightening margin is required for the fit between the footboard and the rolling bearing outer surface side, but the inner side of the rolling bearing and the shaft body There is no need to tighten in between. Therefore, there is no need to step or press-fit the rolling bearing to the shaft body, and it is not a structure that requires high processing / forming accuracy. Smooth rotation without rattling can be maintained without excessive force.

  Also, for the workability when assembling the footboard to the pedal frame, the footboard with the rolling bearing press-fitted into the mounting hole in the base end in advance is supported between the support parts of the pedal frame by the shaft inserted through the rolling bearing. Assembly can be performed with a simple operation. Furthermore, since the footboard is pivotally attached to the shaft body in a stable state supported at both ends between the support portions of the pedal frame via a rolling bearing, the shaft portion of the conventional cantilever support is rolled. Compared to the structure supported by the bearing, the shaft body is less likely to be deformed, and in addition, the rolling bearing can be fixed near the opening of the mounting hole close to the support portion, so that the shaft body can be configured to be more difficult to deform. Also, it is possible to prevent the rolling bearing from being damaged or rattling. Therefore, the size of the shaft body, the material, and the range of selection of the rolling bearing are also increased.

  Further, according to the configuration of the present invention, a roller bearing is used as the rolling bearing, the roller bearing is press-fitted into the mounting hole in the base end portion of the footboard, and the foot is inserted into the shaft body inserted into the inner roller side. The board can be smoothly rotated. Thus, since the present invention can employ a roller bearing, the mounting hole for crimping the roller bearing can also have a simple structure such as a straight hole, which facilitates processing and reduces production costs. In particular, if it is a needle bearing, it is lightweight and durable, and smooth rotation is realized.

  In addition, since a thrust washer through which the shaft body is inserted is interposed between the base end of the footboard and the pedal frame support, the lateral movement of the footboard is suppressed and smooth rotation is maintained. At the same time, an unreasonable force in the axial direction can be prevented from acting on the rolling bearing provided in the mounting hole.

  Further, if the mounting hole provided in the base end portion of the footboard is a straight hole that does not have a small-diameter stepped portion for locking the rolling bearing, processing is easy and production cost can be reduced.

  In addition, a support hole penetrating in the lateral direction is provided in the support portion of the pedal frame, and a spacer member having a bottomed or bottomless insertion hole into which the end portion of the shaft body is inserted is provided in the support hole. For example, after the end of the shaft body is loosely fitted into the support hole of the support portion, a spacer member is attached to the support hole from the outside, and the end of the shaft body is inserted. It can be inserted into the hole and fixed easily, and the assembly workability is remarkably improved. In addition, it is possible to absorb the error with the spacer member and fix it firmly without obtaining the fitting dimensional accuracy of the strong pedal frame support or shaft body.

  In particular, a threaded hole that is open on the lower surface side of the pedal frame and communicates with the inside of the support hole is provided, and a side wall portion of the spacer member is opened at a position corresponding to the threaded hole and the insertion hole A shaft body provided with a through hole or a screw hole communicating with the inside of the pedal frame and inserted into the support hole through the support portion of the pedal frame and the side wall portion of the spacer member by a male screw attached from the lower surface side of the pedal frame In the case where the shaft body is fixed to the inside of the support hole of the pedal frame via the spacer member by pressing the end portion of the shaft, the shaft body and the pedal frame are assembled easily and reliably. Can do.

  In addition, since the insertion hole of the spacer member is a hole with a bottom, and a through screw hole that communicates with the outside along the axial direction from the bottom portion is provided, when the pedal is disassembled, the screw hole is externally inserted into the screw hole. By screwing a screw and pressing the end face of the shaft body inside the insertion hole, the shaft body or spacer member can be moved inward or outward along the axial direction with respect to the support hole, and easily from the support hole. Can be withdrawn.

The side view which shows the foot pedal which concerns on 1st Embodiment of this invention. FIG. (A), (b) is sectional drawing of the principal part. The side view which shows the hi-hat stand using the foot pedal which concerns on 2nd Embodiment of this invention. The side view which similarly shows the folding operation of a foot pedal. The top view which shows the principal part of a foot pedal similarly.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  First, a first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the foot pedal 1 according to the present invention has a base end portion 30 rotatably supported by a pedal frame 2 and a support portion 6 provided on the rear end side of the pedal frame 2. The foot board 3 is configured to operate the musical instrument through an operating member 5 connected to the distal end side by a stepping operation.

  In particular, in the present invention, as shown in FIGS. 2 and 3, mounting holes 31 penetrating in the lateral direction are provided in the base end portion 30 of the footboard 3, and the inner peripheral surfaces of the left and right end portions of the mounting hole 31 are provided. The radial rolling bearings 32 are fixed to each other, and the support portions 6 of the pedal frame 2 are provided at positions on the left and right outer sides of the base end portion 30 of the footboard 3, respectively, and the mounting holes 31 of the footboard and the respective rolling bearings are provided. A shaft body 7 that penetrates through 32 is provided, and both end portions 70 of the shaft body 7 are fixed to the support portions 6 on the left and right sides of the pedal frame 2.

  As described above, the foot pedal 1 has a structure in which the base end portion 30 of the foot board 3 is rotatably supported by the shaft body 7 installed between the support portions 6 and 6 of the pedal frame 2 via the rolling bearing 32. Yes, there is no need for tightening between the inside of the rolling bearing 32 and the shaft body 7, and there is no need for a step or a press-fitting to lock the rolling bearing on the shaft body 7, so that high processing / molding accuracy is unnecessary. Therefore, the degree of freedom in design is wide, and no excessive force is generated in the axial direction on the sliding and rolling bearings, so that a smooth rotation operation without backlash can be maintained for a long time.

  The foot pedal 1 of the present embodiment is configured as a foot pedal for a drum. As shown in FIG. 1, the pedal frame 2 has a frame body 20 that is long before and after being placed on the floor, and the front end of the frame body 20. Rotation shaft in which a beater 41 for hitting the drum head is attached between the upper ends of the left and right support columns 21. 4 is supported horizontally. Support portions 6 and 6 for supporting the footboard 3 are formed at the front end portion of the heel portion 22 provided on the rear end side of the frame body 20. Although this example is a single pedal, it is of course applicable to each pedal that uses a plurality of foot pedals 1 such as a double pedal.

  A substantially disc-shaped wheel 40 is fixed to the central position of the rotation shaft 4 and is connected in a state where the other end of the chain as the operating member 5 extending from the tip of the foot board 3 is wound. A beater 41 is attached near the center position adjacent to the wheel 40 of the shaft 4. A cam (not shown) is fixed to a portion of the rotating shaft 4 that protrudes outward from the column portion 21, and a coil spring is disposed between the cam and the root portion of the column portion 21. For example, leather or a synthetic resin band or timing belt may be used as the actuating member 5 in addition to the chain.

  Then, when the foot board 3 is stepped on with the foot, the actuating member 5 on the distal end side is pulled down integrally, the wheel 40 connected to the actuating member 5 rotates integrally with the rotating shaft 4, and the beater 41 is a drum. Strike the head. At this time, when the coil spring is extended by the rotation of the cam and the stepping force is released from the foot board 3, the rotating shaft 4 is rotated in the opposite direction by the elastic restoring force of the coil spring, and the beater 41 and the foot board are rotated. 3 returns to the initial position, enabling the next striking operation.

  The frame main body 20 and the pair of left and right support columns 21 are integrally formed of a metal material such as an aluminum alloy by casting. The frame main body 20 has a dimension that is larger than that of the foot board 3 on the front end side, and is provided with a clamping means 23 for fixing to the bass drum hoop on the front end side, and on the rear end side the support parts 6, 6. And a heel portion 22 on which the heel of the performer's foot is placed. In this example, the heel portion 22 is also formed integrally with the rear end portion of the frame main body 20 at the time of casting, so that the number of parts is small and the weight can be reduced.

  The support portions 6 and 6 are provided at left and right positions on the front end side of the heel portion 22 so as to protrude forward from both the left and right sides so as to sandwich the base end portion 30 of the footboard 3. That is, the heel portion 22 is formed in a substantially concave shape in plan view when the heel portion main body 22a and the support portions 6 and 6 are combined. The frame body 20 has a heel base as a heel portion 22 attached separately to a rear end portion of a base plate made of steel or the like, and a post frame attached separately as a post portion 21 to a front end portion of the base plate. It may be a thing.

  The foot board 3 is a plate-like casting made of a metal material, like the pedal frame 2, but may be a steel board or a synthetic resin board. The attachment hole 31 of the base end portion 30 is a horizontal straight hole that is missing on the lower surface side. In the present invention, since the rolling bearing can be crimped to the inner surface of the mounting hole 31, it is not necessary to form a small-diameter stepped portion for locking the rolling bearing, and it can be easily processed with a straight hole. Of course, such a step for locking the rolling bearing may be formed. In addition, when providing a stepped portion for locking, instead of forming a stepped portion on the inner peripheral surface of the mounting hole 31, a small-diameter cylindrical body is inserted in the middle portion of the straight hole, and both end portions thereof are ball bearings. It is a preferable example that a stepped portion for locking is made in terms of good processing and assembly.

  A roller bearing is used for the rolling bearing 32 fixed to the inner peripheral surface of the mounting hole 31. The roller bearing is press-fitted into the inner peripheral surface of the mounting hole 31 and smoothly rotates integrally with the foot board 3 with respect to a shaft body inserted through the inner roller side. The present invention does not require an interference between the shaft body 7 and a roller bearing can be adopted as the rolling bearing 32. Therefore, the mounting hole for pressure-bonding the roller bearing can have a simple structure such as a straight hole, Processing is easy and production costs can be reduced. In particular, if the rolling bearing 32 is a needle bearing, it is lightweight and durable, and smooth rotation is realized. However, the rolling bearing 32 may be a ball bearing.

  As shown in FIGS. 3 (a) and 3 (b), the end portions of the shaft body 7 are respectively provided on the support portions 6 and 6 for fixing the both end portions 70 of the shaft body 7 penetrating the mounting holes 31 and the respective rolling bearings 32. A support hole 60 penetrating in the lateral direction for receiving 70 is provided, and the pedal frame 2 and the foot board 3 can be easily assembled by inserting the shaft body 7 from the outside of the support hole 60. ing. Note that only one of the left and right sides may be used as a support hole penetrating such a hole, or as a notch hole that does not penetrate and opens on the inside and on the upper or lower side of the pedal frame. A structure in which the end portion 70 of the shaft body 7 inserted into the base end portion 30 of the footboard 3 is mounted and the end portion 70 is fixed by another member or the like that closes the opening may be used.

  As shown in FIGS. 3A and 3B, a spacer member 8 is interposed between the end portion 70 of the shaft body 7 and the inner peripheral surface of the support hole 60. The spacer member 8 is provided with a bottomed or bottomless insertion hole 80 into which the end portion 70 is inserted, and after assembling, the end portion 70 of the shaft body 7 is loosely fitted into the support hole 60. By inserting the spacer member 8 from the outside of the support hole 60 and inserting the end portion 70 of the shaft body 7 into the insertion hole 80, the assembly can be easily performed.

  Further, the support portion 6 is provided with a screw hole 61 that opens to the lower surface side and communicates with the internal space of the support hole 60, and the insertion hole is also provided at a position corresponding to the screw hole 61 on the side wall portion of the spacer member 8. A through hole 81 or a screw hole communicating with the inside of the 80 is formed, and the male screw 62 is screwed into the screw hole 61 from the lower surface side, and the end portion 70 of the shaft body 7 is connected to the tip portion penetrating the through hole 81. By pressing upward, the end portion 70 is fixed inside the support hole 60 via the spacer member 8. Here, if the through hole 81 is a long hole in the axial direction, the fixing position of the spacer member 8 in the axial direction with respect to the support hole 60 can be adjusted, and even if the length of the shaft body 7 varies. This is preferable in that the spacer member 8 can be firmly attached to the end portion 70 and fixed to the inside of the support hole 60 by the male screw 62.

  A screw hole 82 penetrating outward in the axial direction is provided at the bottom of the insertion hole 80 of the spacer member 8. When the pedal is disassembled, a male screw is screwed into the screw hole 82 from the outside and the end surface of the shaft end portion 70 inside the insertion hole 80 is pressed to fix the end portion 70 or the spacer member 8 fixed to each other. Can be moved inward or outward along the axial direction and easily detached from the support hole 60.

  In the present embodiment, a thrust washer 9 through which the shaft body 7 is inserted is further interposed between the footboard base end portion 30 and the pedal frame support portion 6. This suppresses lateral blur of the footboard 3, but such a thrust washer is not essential, and blur can be suppressed by reducing the gap. Alternatively, the spacer member 8 may be protruded to substitute.

  Next, a second embodiment of the present invention will be described based on FIGS.

  The foot pedal 1A of the present embodiment is configured as a pedal for a hi-hat stand H as shown in FIG. As shown in FIG. 4, the hi-hat stand H has a stand main body 12 that supports the cymbals 10 and 11 that are musical instruments at the top, a foot pedal 1 </ b> A that plays the cymbal, and a foldable leg device that supports the stand main body 12. 17.

  The stand body 12 is inserted into the lower pipe 13, the upper pipe 14 inserted through the upper portion of the lower pipe 13 and supported by a thumbscrew so that the height can be adjusted, and the lower pipe 13 and the upper pipe 14. The lift rod 15 is lifted and lowered by a stepping operation of the foot pedal 1A that protrudes downward and is connected, and the upper cymbal 11 is held in a portion protruding upward, and is housed in the lower pipe 13, and the lift rod 15 is attached upward. A coil spring (not shown) that urges the upper cymbal 11 away from the lower cymbal 10 is formed. The lower cymbal 10 is supported by the upper end portion of the upper pipe 14, and the upper cymbal 11 is held by a cymbal holder 16 fixed to the upper end portion of the lifting rod 15 protruding from the upper end of the upper pipe 14.

  The foot pedal 1 </ b> A includes a pedal frame 2 and a foot board 3 whose base end portion 30 is rotatably supported by a support portion 6 provided on the rear end side of the pedal frame 2. An operating member 5 made of a chain is connected to the tip, and the other end of the operating member 5 is connected to the lower end of the lifting rod 15. Then, when the foot board 3 of the foot pedal 1A is depressed, the actuating member 5 on the distal end side is pulled down, whereby the lifting rod 15 is also pulled down against the coil spring, and the upper cymbal 11 is also lowered together with the lifting rod 15. Thus, it is possible to perform by hitting the lower cymbal 10. For example, leather or a synthetic resin band or timing belt may be used as the actuating member 5 in addition to the chain.

  As shown in FIG. 5A, the pedal frame 2 of the foot pedal 1A has a support frame 24 that is fixed on the lower end of the stand body 12 and is installed on the floor surface, and can be rotated up and down with respect to the support frame 24. And a heel portion 22 provided at the rear end portion of the connection frame 25, and a front end portion of the heel portion 22 in FIG. As shown in FIG. 2, support portions 6 and 6 for supporting the footboard 3 are formed.

  The support frame 24 is composed of an upper and lower frame and left and right columns in a front view, and a pair of connecting frames 25 are pivotally supported on the left and right columns 24a. Each connecting frame 25 extends from the end pivotally supported in the middle of the support column 24a obliquely toward the floor surface, bends and extends in a horizontal direction along the floor surface, and a substantially L-shaped main frame 26; A branch piece 27 extending horizontally from the bent portion of the main frame 26 toward the support frame 24 is formed.

  As shown in FIG. 5, an engagement protrusion 27a that engages with an engagement hole 24c near the lower end of the support post 24a is provided at the end of the branch piece 27, and the engagement protrusion 27a and the engagement hole 24c are connected to each other. By connecting the branch piece 27 to the support frame 24 by engagement, the connection frame 25 is fixed to the support frame 24, and the foot pedal 1 </ b> A functions as a leg that supports the stand body 12. When folding, as shown in FIG. 5B, the engagement is released, the branch piece 27 is separated from the support post 24a, and the connecting frame 25 is rotated upward with respect to the support frame 24 to stand. The posture can be changed to a folding posture along the main body 12.

  The support structure of the foot board 3 and the pedal frame 2 is the same as that of the first embodiment. That is, a mounting hole 31 penetrating in the lateral direction is provided in the base end portion 30 of the footboard 3, and the rolling bearings 32 are respectively fixed to the inner peripheral surfaces of the left and right end portions of the mounting hole 31. Support portions 6 of the pedal frame 2 are respectively provided at positions on the left and right outer sides of the end portion 30, a shaft body 7 that penetrates the mounting hole 31 of the footboard and each rolling bearing 32 is provided, and both end portions 70 of the shaft body 7 are provided. The pedal frame 2 is fixed to the left and right support portions 6 respectively.

  As shown in FIG. 6, the support portions 6 and 6 are provided at left and right positions on the front end side of the heel portion 22 so as to protrude forward from both the left and right sides and sandwich the base end portion 30 of the footboard 3. That is, the heel portion 22 is formed in a substantially concave shape in plan view when the heel portion main body 22a and the support portions 6 and 6 are combined. The other structures are the same as the structures and modifications of FIGS. 2 and 3 described in the first embodiment, and a description thereof is omitted.

  As mentioned above, although each embodiment of this invention was described, this invention is not limited to such an Example at all, Of course, it can implement with a various form in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1, 1A Foot pedal 2 Pedal frame 3 Foot board 4 Rotating shaft 5 Actuating member 6 Support part 7 Shaft body 8 Spacer member 9 Thrust washer 10, 11 Cymbal 12 Stand main body 13 Lower pipe 14 Upper pipe 15 Lifting rod 16 Cymbal holder DESCRIPTION OF SYMBOLS 17 Leg apparatus 20 Frame main body 21 Support | pillar part 22 Heel part 22a Heel part main body 23 Clamp means 24 Support frame 24a Support | pillar 24c Engagement hole 25 Connection frame 26 Main frame 27 Branch piece 27a Engagement protrusion 30 Base end part 31 Attachment hole 32 Rolling Bearing 40 Wheel 41 Beater 60 Support hole 61 Screw hole 62 Male screw 70 End 80 Insertion hole 81 Through hole 82 Screw hole H Hi-hat stand

Claims (8)

A foot for operating the instrument via an operating member that is pivotally supported by a pedal frame and a support portion provided on the rear end side of the pedal frame and connected to the front end side by a player's stepping operation. A foot pedal for musical instruments consisting of a board,
In the base end portion of the footboard, a mounting hole that penetrates in the lateral direction is provided,
Fix the radial rolling bearings to the inner peripheral surfaces of the left and right ends of the mounting hole,
The support portions of the pedal frames are provided at positions on the left and right outer sides of the base end portion of the footboard,
The mounting hole provided in the base end portion of the footboard, and a shaft body that penetrates each rolling bearing fixed to the mounting hole,
Fix both end portions of the shaft body to the left and right support portions of the pedal frame,
As a result, the foot pedal for a musical instrument is configured such that the base end portion of the foot board is rotatably supported by the shaft body that is installed between the support portions of the pedal frame via the rolling bearing.   The foot pedal according to claim 1, wherein the rolling bearing is a roller bearing.   The foot pedal according to claim 2, wherein the rolling bearing is a needle bearing.   The foot pedal according to any one of claims 1 to 3, wherein a thrust washer through which the shaft body is inserted is interposed between the base end portion of the foot board and the support portion of the pedal frame.   The foot pedal according to any one of claims 1 to 4, wherein the mounting hole provided in the base end portion of the footboard is a straight hole having no small-diameter stepped portion for locking the rolling bearing. The support hole penetrating laterally to the support part of the pedal frame is provided, on the inside of the support hole, through the bottom or scan spacers member having a bottomless insertion hole of the end portion of the shaft body is inserted The foot pedal according to any one of claims 1 to 5, wherein the shaft body end portion is fixed.
  A threaded hole is provided on the lower surface side of the pedal frame and communicated with the inside of the support hole. The spacer member has a side wall that opens at a position corresponding to the threaded hole and is inside the insertion hole. A shaft hole inserted into the support hole through the support portion of the pedal frame and the side wall portion of the spacer member by a male screw attached from the lower surface side of the pedal frame. The foot pedal according to claim 6, wherein the shaft body is fixed to the inside of the support hole of the pedal frame through a spacer member by pressing the end portion upward.   The insertion hole of the spacer member is a bottomed hole, and is provided with a threaded hole that penetrates from the bottom to the outside along the axial direction. When disassembling the pedal, a male screw is externally attached to the threaded hole. The shaft body or the spacer member is moved inward or outward along the axial direction with respect to the support hole by screwing and pressing the end face of the shaft body inside the insertion hole, and is detached from the support hole. The foot pedal according to 6 or 7.

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