JP4701077B2 - Grand piano damper - Google Patents

Description

  The present invention relates to a damper for a grand piano that imparts a damper pedal effect by releasing all strings in conjunction with the operation of the damper pedal.

  FIG. 8 partially shows a conventional general damper of a grand piano. The damper 51 includes a damper rail 2 and a plurality of damper levers 3 (only one is shown). The damper rail 2 is disposed on the rear side of a plurality of keys (not shown) so as to extend in the left-right direction, and is fixed to the front surface of the damper rail insert 5 with screws 4. The damper lever 3 is provided for each key, and at the rear end portion, the damper lever 3 is rotatably supported by a damper lever flange 6 screwed to the damper rail 2, and the front end portion is the rear end portion of the corresponding key. It faces from above. A lower end portion of a damper wire flange 7 is rotatably connected to the damper lever 3, and a damper wire 8 extending upward is attached to the damper wire flange 7 by a wire flange socket screw 8a. Further, the damper wire 8 is passed through the guide holder in the middle thereof, and a damper head is provided at the upper end portion, and this damper head comes in contact with the horizontally stretched string from above. (See FIG. 1).

  The damper 51 further includes a lifting rail 60. The lifting rail 60 is disposed immediately below the plurality of damper levers 3 so as to extend in the left-right direction. The lifting rail 60 is mounted on a lifting rail lifting rod 11 extending in the vertical direction, and a lower end portion of the lifting rail lifting rod 11 is connected to a damper pedal (not shown).

  Further, the lifting rail 60 is rotatably connected to the lifting lever flange 13 (only one is shown) via a plurality of lifting levers 52. The lifting lever flange 13 is disposed at a plurality of positions in the length direction of the damper rail 2 and is fixed to the front surface of the damper rail 2 with screws 14. Each lifting lever 52 is made of, for example, a block-like wood material, and is supported at the rear end by a metal center pin 13a of the lifting lever flange 13 so as to be rotatable, and by a screw 53 from above. The upper surface of the lifting rail 60 is screwed.

  With the above configuration, when the damper pedal is depressed, the lifting rail 60 is pushed up by the lifting rail lifting rod 11 and pivoted upward integrally with the lifting lever 52 around the lifting lever flange 13. , Push up all the damper levers 3. As a result, the damper lever 3 pivots upward, and all the damper heads are separated from the strings at the same time, thereby obtaining a damper pedal effect in which the strings that are not depressed are resonated with the depressed strings.

  However, when this conventional damper 51 needs to remove the lifting rail 60, the lifting lever flange 13 or the lifting lever 52 for maintenance or the like, it is not possible to remove these components alone. There is a problem that work cannot be performed easily. For example, assuming that the lifting lever flange 13 is damaged and removed, the lifting lever 52 existing on the front side of the screw 14 fixing the lifting lever flange 13 becomes in the way, and the driver cannot access the screw 14. Therefore, it is impossible to remove the lifting lever flange 13.

  For this reason, in this damper 51, in order to remove the lifting lever flange 13, the screw 4 which fixes the damper rail 2 must be removed, and the entire damper 51 must be removed. Further, since the damper wire 8 is passed through the guide holder, in order to pull out the removed damper 51 forward, it is necessary to loosen each wire flange socket screw 8a and remove all the damper wires 8. As a result, the removal work and the reattachment work of the damper wire 8 are very large and complicated, and the adjustment work of the damper wire 8 is required at the time of the reattachment, which takes a lot of time. End up. Such troublesome maintenance is caused in exactly the same manner when removing the lifting rail 60 or the lifting lever 52 because the entire damper 51 must be removed by removing the screw 4 in the same manner as described above.

  The present applicant has already disclosed a grand piano damper for solving such a problem, for example, in Patent Document 1. As shown in FIG. 9, the lifting lever 62 of the damper 61 is formed of, for example, a pressed product of one steel plate, and includes a flange connecting portion 62a and a rail connecting portion 62b that is bent from the front end and extends forward. It consists of The flange connecting portion 62a is rotatably supported at the rear end portion thereof by a metal center pin 13a of the lifting lever flange 13, and the rail connecting portion 62b is fixed to the upper surface of the lifting rail 60 with a screw 63. The rail connecting portion 62b is formed with a driver insertion hole 62c at a position corresponding to the screw 14 for fixing the lifting lever flange 13. For this reason, the driver D can be passed through the driver insertion hole 62c from the front, and the screw 14 can be loosened by the driver D. Thereby, the lifting lever flange 13 can be removed from the damper rail 2 together with the lifting lever 62 and the lifting rail 60, and the above-described problems of the conventional damper 51 are eliminated.

  However, since the lifting lever 62 of the conventional damper 61 is formed of a pressed product of a single steel plate and the driver insertion hole 62c is formed, sufficient strength and rigidity cannot be ensured. On the other hand, since a large thrust force is repeatedly applied to the lifting lever 62 from the lifting rail lifting rod 11 as the damper pedal is operated, the lifting lever 62 cannot withstand such a lifting operation, Deformation may occur. In addition, since the lifting lever 62 and the center pin 13a of the lifting lever flange 13 that directly supports the lifting lever 62 are made of metal, noise is generated when the lifting lever 62 rubs against the center pin 13a when rotating. There is also a problem that it is likely to occur.

  The present invention has been made to solve such a problem, and the lifting lever flange, the lifting lever or the lifting rail can be removed independently of the other components of the damper, thereby An object of the present invention is to provide a damper for a grand piano that can greatly simplify the maintenance work and can sufficiently ensure the strength and rigidity of the lifting lever.

JP 2001-331171 A

  In order to achieve this object, the present invention is a grand piano damper that imparts a damper pedal effect by releasing all strings in conjunction with the operation of the damper pedal, and a damper rail extending in the left-right direction; A plurality of damper levers that extend in the front-rear direction, are pivotally attached to the damper rail at the rear end, and rotate upward to release the corresponding string, and a plurality of screws fixed to the front surface of the damper rail with screws Lifting lever flange, a plurality of lifting levers rotatably supported by a plurality of lifting lever flanges, and a damper pedal disposed below the plurality of damper levers and integrally connected to the plurality of lifting levers Lifting lever frenzy by being pushed up with the operation of A lifting rail that pivots around the center, pushes up all the plurality of damper levers and pivots upward to release all the strings, and each of the plurality of lifting levers extends in the front-rear direction and For inserting a screwdriver to rotate the screw from the front between the flange connecting portion that is pivotally supported by the lifting lever flange at the end, and fixed to the lower side of the flange connecting portion. It has a rail insertion part that is integrally connected to the lifting rail while defining a driver insertion passage.

  In this grand piano damper, the lifting rail is rotatably supported by a plurality of lifting lever flanges via a plurality of lifting levers, and is lifted in accordance with the operation of the damper pedal. As a center, it pivots upward together with the lifting lever, pushes up all of the plurality of damper levers simultaneously, and pivots upward. Thereby, the damper pedal effect is given by releasing all the strings all at once.

  Further, the lifting lever of this damper has a flange connecting portion rotatably supported by the lifting lever flange and a rail connecting portion fixed to the lower side thereof and integrally connected to the lifting rail. A driver insertion passage for inserting a driver from the front is defined between the connecting portions. Therefore, by inserting a screwdriver into this screwdriver insertion path and rotating the screw that secures the lifting lever flange on the front of the damper rail with a screwdriver and loosening it, the lifting lever flange together with the lifting lever and lifting rail, It can be removed from the damper rail. After removal, if necessary, the lifting lever flange, lifting lever and lifting rail are further disassembled from each other. As described above, the lifting lever flange and the like can be removed independently from other components of the damper, so that unlike the conventional case, the troublesome operation of removing, reattaching and adjusting the damper wire is not required. Thus, the maintenance work and the like can be greatly simplified.

 Furthermore, since the lifting lever is composed of at least two parts consisting of a frenzy coupling part and a frenzy coupling part fixed to the lower side thereof, the conventional lifting lever is composed of a pressed product of one steel plate. Unlike the lifting lever, its strength and rigidity can be sufficiently secured. As a result, even if a large pushing force is repeatedly applied to the lifting lever as the damper pedal is operated, the lifting lever can be reliably prevented from being damaged or deformed, and the stable operation of the damper can be maintained for a long period of time. .

  The invention according to claim 2 is characterized in that, in the damper of the grand piano according to claim 1, the flange connecting portion of the lifting lever is made of a block-like wood material.

  In this configuration, the flange connecting portion of the lifting lever is made of a wood material and has a block shape, so that the strength and rigidity of the lifting lever can be increased. In addition, since the flange connection part is made of wood material, even if the lifting lever flange part that directly supports it is made of metal, the occurrence of noise when the lifting lever rotates is reliably prevented. Can do. Further, as described above, the conventional ordinary damper lifting lever shown in FIG. 8 is also made of a block-like wood material. For this reason, by partially utilizing such an existing lifting lever, the frenzy coupling part can be easily formed without a major design change, thereby reducing the manufacturing cost.

  The invention according to claim 3 is the damper of the grand piano according to claim 2, wherein the rail connecting portion of the lifting lever is fixed in a state where the rail connecting portion is fitted to the flange connecting portion, and the lower ends of the left and right side walls. It is characterized by being made of a metal material having a U-shaped cross section that extends between them and has a bottom wall fixed to the lifting rail.

  In this configuration, since the rail connecting portion of the lifting lever is made of a metal material, the strength and rigidity of the lifting lever can be further increased. Further, since the rail connecting portion is made of a metal material, the rail connecting portion can be firmly fixed to the frenzy connecting portion and the lifting rail by screwing or the like. Furthermore, since the rail connecting portion is formed in a U-shaped cross section from the left and right side walls and the bottom wall, a driver insertion passage can be easily and sufficiently defined between the rail connecting portion.

  According to a fourth aspect of the present invention, in the damper of the grand piano according to the third aspect, the left and right side walls of the rail connecting portion respectively project inward from the side walls and are fitted between the left and right side walls. The support protrusion which supports in the state which mounted the part is integrally formed.

  In this configuration, since the flange connection portion fitted between the left and right side walls of the rail connection portion is supported in a state of being placed on the support protrusion protruding inward from the side wall, the flange connection portion and the rail connection portion are It can be fixed and integrated more firmly, and in particular, it can effectively reinforce the load in the vertical direction.

  According to a fifth aspect of the present invention, in the damper for the grand piano according to the fourth aspect, the rail connecting portion is formed of a bent metal plate, and the support protrusion is cut so as to extend upward with the lower end portion as a base portion. The remaining uncut piece of the side wall is formed by bending inwardly perpendicular to the side wall.

  In this configuration, since the support protrusion of the rail connecting portion is formed by bending an uncut piece extending upward with the lower end portion as a base portion, even if the R portion is left inside the corner portion of the bent support protrusion. And the corner | angular part of a flange connection part does not fit into this R part. Therefore, the flange connecting portion can be fitted to the rail connecting portion exactly, and rattling of the lifting lever and damage to the corners of the flange connecting portion can be reliably avoided.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a damper of a grand piano according to a first embodiment of the present invention. Of the components of the damper 1, the same components as those of the conventional ordinary damper 51 shown in FIG. 8 are described with the same reference numerals.

  The basic configuration of the damper 1 is the same as that of the conventional damper 51, and includes a damper rail 2, a plurality of damper levers 3 (only one shown), a lifting rail 10, and the like. The damper rail 2 is made of, for example, an aluminum extruded product, and is arranged to extend in the left-right direction behind a plurality of keys (not shown). Has been. A plurality of damper flanges 6 (only one is shown) provided for each key are fixed to the front surface of the damper rail 2 with screws (not shown) and a plurality of lifting lever flanges 13 (only one is shown). ) Is fixed with a screw 14. These lifting lever flanges 13 are disposed at a total of three locations, for example, two locations on the left and right ends of the damper rail 2 and one location on the middle. Each lifting lever flange 13 has a horizontal metal center pin 13a extending in the left-right direction.

  Each damper lever 3 is rotatably supported by a damper lever flange 6 at its rear end portion, extends in the front-rear direction, and the front end portion faces the rear end portion of the corresponding key from above. A weight 22 made of lead or the like is attached to each damper lever 3 in order to add weight to the damper lever 3. A damper wire flange 7 is rotatably attached to the damper lever 3 and a damper wire 8 extending upward is attached to the damper wire flange 7 by a wire flange socket screw 8a. The damper wire 8 is passed through a guide holder 23 for guiding the damper wire 8 so as not to be swayed in the horizontal direction, and a damper head 9 is attached to the upper end portion thereof. The damper head 9 is made of wood, and comes into contact with a horizontally stretched string S from above via two front and rear damper felts 24, 24 attached to the lower surface thereof.

  The lifting rail 10 is mounted on a lifting rail lifting rod 11 extending in the vertical direction, and a lower end portion of the lifting rail lifting rod 11 is connected to a damper pedal (not shown). In addition, a lifting rail cross 25 is attached to the upper surface of the lifting rail 10, and an adjustment pilot screw 26 screwed into the lower surface of the damper lever 3 is attached to the lifting rail cross 25 in a predetermined manner. Opposite from above with a gap. The configuration of the damper 1 described so far is the same as that of the conventional damper 51.

  Furthermore, the lifting rail 10 of the present embodiment is made of, for example, an aluminum extrusion-molded product, and has two front and rear holes 10a and 10a extending in the left-right direction to reduce the weight, and is formed in a hollow shape. The lifting rail 10 is rotatably connected to a lifting lever flange 13 via a plurality of lifting levers 12 (only one shown) according to the present invention. The lifting lever 12 includes a flange connecting portion 15 and a rail connecting portion 16 fixed to the lower side thereof.

  As shown in FIG. 2, the frenzy connecting portion 15 has a substantially rectangular cross section, is formed in a block shape extending in the front-rear direction, and is made of a woody material such as maple. The rear end portion of the flange connecting portion 15 is a connected portion 15a having a smaller width and height than the other portions, and a center pin 13a of the lifting lever flange 13 is passed through the connected portion 15a. A pin through hole 15b is formed. A shallow arc-shaped recess 15c for facilitating the passage of the driver D is formed on the lower surface of the flange connecting portion 15 so as to extend in the front-rear direction. Flat mounting portions 15d and 15d are mounted on the support protrusions 16d. In addition, two front and rear holes 15e and 15e for screwing with the rail connecting portion 16 are formed on the side surface of the frenzy connecting portion 15 so as to pass therethrough.

  On the other hand, the rail connecting portion 16 is formed of, for example, a press-formed product of a steel plate, and as shown in FIG. It is formed in a shape. Each side wall 16a is formed with a hole 16c for screwing with the flange connecting portion 15 and a support protrusion 16d. The holes 16c and the support projections 16d are arranged in a staggered manner so as to be aligned with each other on the side walls 16a and between the side walls 16a and 16a. As shown in FIG. 4B, the support protrusion 16d has an uncut piece 16e (see FIG. 4) left uncut so as to extend upward with the lower end as a base, inwardly perpendicular to the side wall 16a. It is formed by bending.

  In addition, on the bottom surface of the rail connecting portion 16, two front and rear holes 16f and 16f for screwing to the lifting rail 10 are formed. Further, a center hole 16g for facilitating weight reduction and bending is formed in the center in the front-rear direction of the rail connecting portion 16 over the entire bottom wall 16b and the lower ends of the side walls 16a and 16a. R-shaped notches 16h are formed at the front and rear corners on the upper side of each side wall 16a.

  The rail connecting portion 16 having the above-described configuration is formed by bending a material plate 17 made of a single flat steel plate having a rectangular shape shown in FIG. Specifically, the two holes 16c, the two uncut pieces 16e, the two holes 16f, the one center hole 16g, and the four notches 16h described above are formed at predetermined positions on the material plate 17 by pressing. Is formed. Then, by bending the material plate 17 along the two fold lines A, A of the same figure by pressing, the rail connecting portion 16 is formed in a U-shaped cross section, and each uncut piece 16e is folded. By bending along the bending line B, the support protrusion 16d is formed.

  As shown in FIG. 5, the frenches connecting portion 15 and the rail connecting portion 16 having the above-described configuration are configured such that the lower half of the former 15 is fitted between the side walls 16 a and 16 a of the latter 16 and the mounting portions 15 d and 15 d are attached. The screw 19 is fixed to each other by being screwed into the hole 15e of the former 15 through the hole 16f of the former 15 through the washer 18 and the hole 16f of the latter 16 while being placed on and supported by the support protrusions 16d and 16d. 12 is assembled. A driver insertion passage 20 penetrating in the front-rear direction is formed between the flange connection portion 15 and the rail connection portion 16 of the lifting lever 12. By inserting the driver D into the driver insertion passage 20 from the front, the lifting lever It is possible to rotate the screw 14 fixing the frenzy 13. Further, the insertion of the driver D can be performed more easily by the recess 15c formed on the lower surface of the flange connecting portion 15.

  Further, the lifting lever 12 is rotatably supported by the center pin through hole 15b of the flange connecting portion 15 being passed through the center pin 13a of the lifting lever flange 13. Further, the lifting lever 12 is fixed to the upper surface of the lifting rail 10 by a screw 21 passed through the hole 16 f of the rail connecting portion 16.

  The operation of the damper 1 having the above-described configuration when the key is depressed and the damper pedal is depressed is basically the same as that of the conventional damper 51. That is, when the key is depressed, the corresponding damper lever 3 is pushed up at the rear end thereof, and the damper head 9 moves upward and moves away from the string S as it rotates upward. Thereafter, when a hammer (not shown) strikes the string S at a predetermined timing, the string S vibrates and a piano sound is generated. Further, when the key is released, the damper head 9 moves downward and comes into contact with the string S as the damper lever 3 returns and pivots downward, so that the damper lever 3, the damper head 9, etc. The vibration of the string S is stopped by the weight, and the sound generation is stopped (stopped).

  On the other hand, when the damper pedal is depressed, the lifting rail 10 is pushed up by the lifting rail lifting rod 11 so as to rotate upward integrally with the lifting lever 12 around the lifting lever flange 13, and the pilot screw 26. All the damper levers 3 are simultaneously pushed up and rotated upward. As a result, all the damper heads 9 are separated from the strings S all at once, and all the strings S are released, thereby obtaining a damper pedal effect. When the operation of depressing the damper pedal is completed, the lifting rail 10 is rotated downward by its own weight, and accordingly, each damper lever 3 is rotated downward so that all the damper heads 9 abut against the string S. And return to the original state.

  Further, since the lifting rail 10, the lifting lever 12, or the lifting lever flange 13 is damaged, for example, when the maintenance is performed, they are removed as follows. That is, as shown in FIG. 1, by inserting the driver D into the driver insertion passage 20 of the lifting lever 12 and loosening the screw 14 with the driver D, the lifting lever flange 13 is moved together with the lifting lever 12 and the lifting rail 10. It can be removed from the damper rail 2. After the removal, if necessary, the lifting rail 10, the lifting lever 12, and the lifting lever flange 13 are further disassembled from each other, for example, by loosening the screw 21. When the lifting lever flange 13 or the like is reinstalled after the necessary repairs or the like are completed, this can be performed in the reverse order of the above.

  As described above, the damper 1 according to the present embodiment can remove and reattach the lifting rail 10, the lifting lever 12, or the lifting lever flange 13 independently of the other components of the damper 1. Therefore, unlike the conventional ordinary damper 51 shown in FIG. 8, the complicated operation of removing, reattaching and adjusting the damper wire 8 is completely unnecessary, so that these maintenance operations can be greatly simplified. it can.

  Further, in the present embodiment, the lifting lever 12 is constituted by a total of two parts, a frangible connecting portion 15 made of a block-like wood material and a rail connecting portion 16 made of a pressed steel plate product. Furthermore, since the rail connection part 16 is comprised with the metal material, this can be firmly fixed to the frenzy connection part 15 with the screw 19. Therefore, unlike the conventional lifting lever 62 shown in FIG. 9 which is formed by pressing a single steel plate, the strength and rigidity of the lifting lever 12 can be sufficiently secured. Moreover, since the frenzy connecting part 15 fitted between the side walls 16a and 16a of the rail connecting part 16 is supported while being placed on the support protrusion 16d of the rail connecting part 16, the frenzy connecting part 15 and the rail connecting part 16 can be more firmly fixed and integrated, and in particular, reinforcement against a load in the vertical direction can be effectively performed. As a result, even if a large thrust force is repeatedly applied to the lifting lever 12 as the damper pedal is operated, the lifting lever 12 can be reliably prevented from being damaged and deformed, and the stable operation of the damper 1 can be maintained for a long time. be able to.

  In addition, since the flange connecting portion 15 is made of a wood material, even if the center pin 13a of the lifting lever flange 13 that directly supports the flange connecting portion 15 is made of metal, the occurrence of noise when the lifting lever 12 is rotated, It can be surely prevented. Furthermore, since the conventional normal lifting lever 52 of FIG. 8 is also made of block-like wood material, by utilizing such an existing lifting lever partially, the frenzy connecting portion 15 can be made large. It can be easily formed without a design change, thereby reducing the manufacturing cost. Furthermore, since the rail connecting portion 16 is formed in a U-shaped cross section from the side walls 16a, 16a and the bottom wall 16b, the driver insertion passage 20 can be easily and sufficiently defined between the flange connecting portion 15. .

  In the present embodiment, the support protrusion 16d of the rail connecting portion 16 is formed by bending an uncut piece 16e extending upward with the lower end portion as a base (see FIG. 6A). FIG. 5B shows an example in which support protrusions are formed upside down from the embodiment for comparison with the embodiment. In other words, in the rail connecting portion 56 of this comparative example, the support protrusion 56d is formed by bending an uncut piece extending downward with the upper end portion as a base, and therefore, an R portion is formed inside the corner of the bent support protrusion 56d. (Shown as “R”) remains, and the lower corner portion of the flange connecting portion 15 is fitted to the R portion. For this reason, it becomes difficult to fit the flange connecting portion 15 to the rail connecting portion 16, which causes rattling of the lifting lever 12 and damage to the corners of the flange connecting portion 15. On the other hand, in this embodiment, since the support protrusion 16d is formed as described above, even if the R portion is left inside the support protrusion 16d as shown in FIG. The corners of the flange connection portion 15 are not fitted. As a result, the frenzy connecting portion 15 can be fitted to the rail connecting portion 16 exactly, and the above-described problems can be avoided reliably.

  FIG. 7 shows a modification of the frenzy connecting portion 15. In this modified example, a demon nut 15f is embedded in each screw fixing hole 15e of the frenzy connecting portion 15 in advance by, for example, driving, and the screw 19 is screwed into the demon nut 15f, whereby the frenzy connecting portion 15 Is fixed to the rail connecting portion 16. Therefore, the frenze connecting portion 15 and the rail connecting portion 16 can be more firmly connected without causing the “screw fuzz” of the frenzy connecting portion 15 made of a wood material, and the strength of the lifting lever 12 can be further increased.

  In addition, this invention can be implemented in various aspects, without being limited to the described embodiment. For example, in the embodiment, the flange connecting portion 15 of the lifting lever flange 12 is made of a wood material, but it may be made of another appropriate material, for example, a synthetic resin having high strength and rigidity. The embodiment is an example in which the present invention is applied to a grand piano, but the present invention may be applied to a ground-type silenced piano or the like. In addition, it is possible to appropriately change the detailed configuration within the scope of the gist of the present invention.

It is a perspective view which shows the damper of the grand piano by embodiment of this invention. It is (a) side view, (b) front view, and (c) bottom view which show the frenzy connection part of a lifting lever. It is (a) top view, (b) front view, and (c) side view which show the rail connection part of a lifting lever. It is a top view which shows the raw material board before bending of a rail connection part. It is a side view of the state which attached the lifting lever to the lifting lever flange and the lifting rail. It is sectional drawing which shows the state which made the flange connection part fit to the rail connection part with a comparative example. It is a side view which shows the modification of a frenzy connection part. It is a fragmentary perspective view which shows the conventional normal damper of a grand piano. It is a fragmentary perspective view which shows the other conventional damper of a grand piano.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Damper 2 Damper rail 3 Damper lever 10 Lifting rail 12 Lifting lever 13 Lifting lever Flanged 14 Screw 15 Frenzy connecting part 16 Rail connecting part 16a Side wall 16b Bottom wall 16d Support protrusion 16e Uncut piece 20 Driver insertion path S String D Driver

Claims (5)

A grand piano damper that gives a damper pedal effect by releasing all strings in conjunction with the operation of the damper pedal,
A damper rail extending in the left-right direction;
A plurality of damper levers extending in the front-rear direction, rotatably attached to the damper rail at the rear end, and rotating upward to release the corresponding strings;
A plurality of lifting lever flanges fixed with screws on the front surface of the damper rail;
A plurality of lifting levers rotatably supported by the plurality of lifting lever flanges;
It is arranged below the plurality of damper levers, is integrally connected to the plurality of lifting levers, and is pushed up along with the operation of the damper pedal to rotate around the lifting lever flange, A lifting rail that releases all the strings by pushing up all of the damper levers and pivoting upward.
Each of the plurality of lifting levers is
A flange connecting portion extending in the front-rear direction and rotatably supported by the lifting lever flange at the rear end;
A driver insertion passage for inserting a screwdriver for rotating the screw from the front is defined between the flange connecting portion and the flange connecting portion. The driver inserting passage is integrally connected to the lifting rail. A damper for a grand piano, comprising: a rail connecting portion.   The damper for a grand piano according to claim 1, wherein the frenzy connecting portion of the lifting lever is made of a block-like wood material.   The rail connecting portion of the lifting lever includes left and right side walls fixed in a state of being fitted to the flange connecting portion, and a bottom wall extending between lower ends of the left and right side walls and fixed to the lifting rail. The damper of the grand piano according to claim 2, wherein the damper is made of a metal material having a U-shaped cross section.   The left and right side walls of the rail connecting portion are integrally formed with support protrusions that protrude inward from the side walls and support the flange connecting portion that is fitted between the left and right side walls. The damper of the grand piano according to claim 3, wherein the damper is provided.   The rail connecting portion is formed of a bent metal plate, and the support protrusion is formed by cutting a left-side cut piece of the side wall that extends upward with a lower end portion as a base, perpendicular to the side wall. 5. The damper of a grand piano according to claim 4, wherein the damper is formed by bending inward.

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