JP2006171236A - Silencer for upright piano - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a silencer for an upright piano that can surely stop a hammer from striking on strings by stopping the hammer from rotating at a proper height in proper timing with relatively simple constitution irrelevantly to a range of sound. <P>SOLUTION: The silencer is equipped with a driving rod 15 which is arranged between a damper 14 and a hammer shank 5b and freely rotates on an axis, a stop rail 16 which is arranged above the driving rod 15 between the damper 14 and hammer 5 and extends to the right and left to be opposed to an upper end of the hammer shank 5b, a coupling member 17 which couples the driving rod 15 and stop rail 16 to each other, and a driving mechanism 18 which drives the driving rod 15 to make the stop rail 16 rotate through the coupling member 17 to freely enter and exit from the rotation range of the hammer shank 5b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is applied to, for example, a composite piano such as a mute piano or an auto-play piano, and allows a string to be struck by a hammer in a normal performance mode, and prevents an upright piano mute in the mute performance mode. About.

  As a conventional silencer for this type of upright piano, for example, one disclosed in Patent Document 1 is known. This silencer 50 is applied to a silencer piano 51. As shown in FIG. 6, the mute piano 51 includes a plurality of keys 52 a, a hammer 54 for striking a string 53, a damper 55 provided between the string 53 and the hammer 54, and a rear upper portion of the keyboard 52. An action 56 for rotating the hammer 54 and the damper 55 is provided, which is provided as the key 52a is rotated.

  Between the hammer 54 and the damper head 55 a of the damper 55, there are provided a rotating shaft 57 and three plates 58 (only one is shown) fixed to the rotating shaft 57. The rotation shaft 57 extends continuously over the entire arrangement direction of the keys 52 a (hereinafter referred to as “left-right direction”), and is rotatably supported by the center rail 60 via the bracket 59. A pedal 63 is connected to one end portion of the rotation shaft 57 via a wire, a protruding rod (both not shown), and the rotation shaft 57 rotates in response to a depression operation of the pedal 63. To do.

  Each of the three plates 58 is for preventing the string 53 from being struck by the hammer 54 in the mute performance mode, and corresponds to each section, for example, the low range, the mid range, and the high range. It is provided and extends continuously over the entire left and right direction in each sound range. Each plate 58 is formed in a “<” shape on the side surface so that the damper block 55 b does not come into contact with the plate 58 during the rotation of the damper 55. It is fixed to the shaft 57. The heights (lengths in the vertical direction) of these plates 58 are different from each other, and are larger on the high sound side. In the normal performance mode, each plate 58 is located at a retracted position (solid line position in FIG. 6) retracted from the rotation range of the hammer shank 54a of the hammer 54, while in the silence performance mode, the rotation range of the hammer shank 54a. It rotates to the approach position (dotted line position in FIG. 6) that entered the inside. Further, an impact absorbing member 61 is attached to the upper front end portion of the plate 58.

  With the above configuration, in the normal performance mode, the plate 58 is positioned at the retracted position, and when the key 52a is depressed in this state, the key 52a rotates about the fulcrum in the clockwise direction in FIG. With this rotation, the action 56 is activated, and the spoon 62 presses the damper 55, whereby the damper 55 rotates in the clockwise direction, and the jack 64 of the action 56 pushes up the hammer 54. Rotates counterclockwise, and the hammer head 54b hits the string 53.

  On the other hand, in the mute performance mode, when the pedal 63 is depressed, the plate 58 rotates together with the rotation shaft 57 clockwise to the entry position. When the key 52a is depressed, the hammer 54 rotates counterclockwise as in the normal performance mode. During this rotation, immediately before the hammer head 54b strikes the string 53, the upper end of the hammer shank 54a abuts against the plate 58 positioned at the entry position, thereby preventing further rotation of the hammer 54. , Striking the string 53 is prevented. Since the size of the hammer head 54b of the hammer 54 is generally smaller on the high sound side, the vertical distance between the hammer head 54b of the hammer 54 and the damper head 55a of the damper 55 is larger on the high sound side. For this reason, as described above, by increasing the height of the plate 58 toward the high sound side, the hammer shank 54a is brought into contact with the plate 58 as close to the upper end as possible on the high sound side. The bending of the hammer shank 54a on the upper end side with respect to the contact position is suppressed, and the stopping accuracy of the hammer 54 is improved.

  In the conventional silencer 50 described above, it is important that the plate 58 is installed at a predetermined height and is accurately installed at a predetermined position in the front-rear direction. This is due to the following reason. That is, in the normal performance mode, in order to transmit the kinetic energy of the hammer 54 to the string 53 as much as possible, the rotation stroke of the hammer 54 from when the jack 64 is detached from the bat 65 until the hammer head 54b strikes is very narrow. This is because, in the mute performance mode, the hammer shank 54a needs to be brought into contact with the plate 58 within such a very narrow stroke. For example, when the plate 58 is displaced to the hammer 54 side, the hammer shank 54a may come into contact with the plate 58 before the jack 64 is detached from the bat 65. In this case, the hammer shank 54a comes into contact with the plate 58. This causes problems such as transmission of the impact to the performer's fingertips and the further inability of the key 52a to rotate. On the other hand, when the plate 58 is shifted to the damper 55 side, the contact timing of the hammer shank 54a is delayed, and the string 53 may be struck even though the mute performance mode is set.

  However, in the above-described conventional silencer 50, since the three plates 58 are directly fixed to the rotating shaft 57, the height of the plate 58 and the position in the front-rear direction are shifted due to dimensional errors and assembly errors of the parts. In some cases, this cannot be adjusted, and as a result, the above-described problems may occur. For the same reason, the plate 58 is formed in a “<” shape so that the damper block 55 b does not come into contact with the plate 58 during the rotation of the damper 55, and the shape becomes complicated.

  The present invention has been made to solve such a problem, and in the mute performance mode, the rotation of the hammer is prevented at an appropriate height and timing regardless of the sound range by a relatively simple configuration. Accordingly, an object of the present invention is to provide an upright piano muffler that can reliably prevent a string from being hit by a hammer.

Japanese Patent No. 2743862

  To achieve this object, the invention according to claim 1 is directed to an upright piano that rotates a hammer having a damper and a hammer shank extending in the vertical direction as the key extends in the front-rear direction. An upright piano silencer that allows a hammer to strike a string in the normal performance mode and prevents it in the silence performance mode, and is arranged between the damper and the hammer shank and extends in the left-right direction. A drive rod that is rotatable around the center, a stop rail that is disposed above the drive rod between the damper and the hammer and extends in the left-right direction so as to face the vicinity of the upper end of the hammer shank, and the drive rod and the stop rail And a connecting member that connects the drive rod and the stop rail, and drives the drive rod. By, characterized in that and a driving mechanism for rotating retractably with respect to the range of rotation of the hammer shank stop rail via the connecting member.

  According to the silencer for an upright piano, the rotatable drive rod is disposed between the damper and the hammer shank of the hammer so as to extend in the left-right direction. A stop rail is connected to the drive rod via a connecting member, and the stop rail is disposed above the drive rod and extends in the left-right direction so as to face the vicinity of the upper end of the hammer shank. Further, the drive mechanism drives the drive rod to rotate the stop rail through the connecting member so as to freely advance and retract within the rotation range of the hammer shank.

  According to this configuration, in the normal performance mode, the drive mechanism allows the stop rail to be rotated to the retracted position retracted from the rotation range of the hammer shank, thereby allowing the string to be struck by the hammer as the key rotates. Thus, a normal performance is performed. On the other hand, in the mute performance mode, the stop rail is rotated to the entry position that has entered the rotation range of the hammer shank, so that the upper end of the hammer shank contacts the stop rail, thereby preventing the hammer shank from rotating. Thus, string striking is prevented.

  According to the present invention, since the stop rail is connected to the drive rod via the connecting member, the size and shape of the connecting member depend on the size of the hammer and the height of the hammer head described above in each sound range. The height of the stop rail and the position in the front-rear direction relative to the hammer shank can be set appropriately. Therefore, the rotation of the hammer in the mute performance mode can be prevented at an appropriate timing at an appropriate height of the upper end of the hammer shank regardless of the sound range, and the bending of the hammer shank when contacting the stop rail is suppressed. However, stringing with a hammer can be reliably prevented. Moreover, since it is only necessary to connect the drive rod and the stop rail with a connecting member, the silencer can be realized with a relatively simple configuration.

  The invention according to claim 2 is the silencer for the upright piano according to claim 1, wherein the stop rail is composed of a plurality of stop rails arranged in the left-right direction, and the connecting member drives the plurality of stop rails. It is comprised by the some connection member respectively connected with a rod.

  According to this configuration, since the stop rails arranged in the left-right direction are connected to the drive rod via the respective connecting members, the height of the stop rail and the position in the front-rear direction with respect to the hammer shank are stopped by each connecting member. It can be set more finely for each rail.

  According to a third aspect of the present invention, in the silencer for an upright piano according to the first or second aspect, the damper includes a damper block, and includes a plurality of dampers arranged in the left-right direction. It is characterized by being arranged between the damper blocks of two adjacent dampers.

  According to this configuration, since the connecting member is disposed between the damper blocks of two adjacent dampers, it is possible to prevent the damper block from colliding with the connecting member as the damper rotates. As a result, it is possible to avoid the occurrence of noise and malfunction of the damper due to the noise.

  The invention according to claim 4 is the silencer for the upright piano according to any one of claims 1 to 3, wherein the stop rail and the connecting member each have a fixing hole, and one of these holes is Further, it is constituted by long holes extending in the front-rear direction, and further includes a fixing screw that passes through these holes and fixes the stop rail to the connecting member.

  According to this configuration, the stop rail and the connecting member are fixed by the fixing screw through the elongated hole formed in one of them and extending in the front-rear direction. Therefore, the position of the stop rail in the front-rear direction with respect to the hammer shank can be finely adjusted by this long hole, and the rotation of the hammer can be prevented at an optimal timing.

  According to a fifth aspect of the present invention, in the silencer for an upright piano according to any one of the first to fourth aspects, the stop rail and the connecting member are connected in a state where they overlap in the vertical direction. A spacer for adjusting the height of the stop rail is interposed between the connecting member and the connecting member.

  According to this configuration, the spacer for adjusting the height of the stop rail is interposed between the stop rail and the connecting member. Therefore, the height of the stop rail with respect to the hammer shank can be finely adjusted, and the rotation of the hammer shank can be prevented at the optimum height of the upper end portion thereof.

  According to a sixth aspect of the present invention, in the silencer for an upright piano according to any one of the first to fifth aspects, when the damper rotates on the damper side surface of the drive rod as the key rotates. The cushion material which contact | abuts to is attached.

  According to this configuration, when the rotating damper comes into contact with the cushion material attached to the damper-side surface of the drive rod, the impact at that time can be absorbed. Further, since the damper rail can be omitted by attaching the cushion material to the drive rod, the number of parts can be reduced accordingly.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an upright silencer piano 2 to which a silencer 1 according to an embodiment of the present invention is applied. In the following explanation, when the mute piano 2 is viewed from the performer, the front side (right side of the figure) is “front”, the back side (left side of the figure) is “rear”, and the left side and right side are further The description will be given as “left” and “right”, respectively. As shown in the figure, the mute piano 2 is provided with a shelf board 3, a plurality of keys 4 (only one shown) placed on the shelf board 3, and provided for each key 4. A hammer 5 to be operated, an action 6 provided above the rear part of the key 4, and a silencer 1 according to the present invention. In the mute piano 2, the performance mode is a normal performance mode in which an acoustic performance sound is generated by allowing the string S to be struck by the hammer 5. In response to the information, a musical tone generator (not shown) is switched to a mute performance mode in which an electronic performance sound is generated.

  The key 4 is rotatably supported by a balance pin 7 erected from a balance rail 3a provided on the shelf board 3 through a balance pin hole (not shown) formed in the center thereof. .

  The string S includes a plurality of tuning pins (not shown) driven into an upper end portion of a frame (not shown) provided behind the shelf board 3, and a plurality of strings embedded below the tuning pins. And a hitch pin (not shown) extending in the vertical direction. The length of the string S varies depending on the sound range, and is shorter on the high sound side. The string S in the high range extends substantially vertically, and the strings S in the middle range and the low range extend obliquely so as to cross each other.

  The action 6 is for rotating the hammer 5 when the key 4 is pressed, and extends in the front-rear direction, and a whippen 9 placed on the rear part of each key 4 via a capstan screw 8; A jack 10 attached to the whippen 9 is provided. Each whippen 9 is rotatably supported by the center rail 11 at the rear end. The jack 10 is formed in an L shape from a push-up portion 10a extending in the vertical direction and an engaging portion 10b extending forward at a substantially right angle from the lower end portion thereof. It is attached. A damper 14 is attached to the rear end of the center rail 11.

  The damper 14 is bonded to the damper lever 14a, the damper wire 14b extending upward from the damper lever 14a, the damper block 14e fixed by the screw 14f, and the damper block 14e with the upper end portion of the damper wire 14b penetrating therethrough. The damper head 14c is attached to the center rail 11 via the damper flange 14d at the center of the damper lever 14a. The damper 14 is for stopping sound when the damper head 14c comes into contact with the vibrating string S when the key 4 is released.

  On the other hand, the hammer 5 includes a bat 5a, a hammer shank 5b extending upward from the bat 5a, a hammer head 5c attached to the upper end of the hammer shank 5b, and the like. 11 is rotatably attached. In the key release state shown in FIG. 1, the tip of the push-up portion 10a of the jack 10 is engaged with the bat 5a, the hammer shank 5b is in contact with the hammer rail 13 at an angle, and the hammer head 5c is opposed to the string S. ing.

  As shown in FIGS. 1 and 2, the silencer 1 according to the present invention includes a drive rod 15, a stop rail 16 for preventing the hammer 5 from rotating, and a connection 4 between the drive rod 15 and the stop rail 16. The connecting member 17 includes a driving mechanism 18 that drives the driving rod 15.

  The drive rod 15 is composed of a single round bar extending in the left-right direction, and its length is larger than the length of the action 6 in the left-right direction. The drive rod 15 is disposed between the hammer shank 5b of the hammer 5 and the damper wire 14b of the damper 14, and the support bracket 19 and the L-shaped bracket 20 are attached to each of three action brackets (none shown). It is supported so that it can rotate freely. As shown in FIG. 2, each support fitting 19 is curved so as to follow the outer periphery of the drive rod 15, and a body portion 19 a whose side surface shape is formed in a U shape, and 2 extending vertically from the front end of the body portion 19 a. It is comprised by the one attachment part 19b, 19b, and the hole 19c is formed in each attachment part 19b. On the other hand, in one piece of each L-shaped bracket 20, two holes 20a and 20a are formed at positions corresponding to the holes 19c of the mounting portions 19b and 19b of the support bracket 19. The support bracket 19 and the L-shaped bracket 20 are fixed to each other by tightening a screw (not shown) through the holes 19c and 20a in a state where the drive rod 15 is passed through the main body 19a of the support bracket 19. As a result, the drive rod 15 is sandwiched between the main body 19 a of the support bracket 19 and one piece of the L-shaped bracket 20. The other piece of each L-shaped bracket 20 is screwed to each action bracket. With the above configuration, the drive rod 15 is rotatably supported by the main body 19 a of the support bracket 19. A cushion material 21 is attached to the surface of the drive rod 15 on the damper 14 side. The cushion material 21 is made of an elastic material such as rubber, and extends along substantially the entire drive rod 15.

  The stop rail 16 is made of, for example, a bent metal plate, and is disposed above the drive rod 15 as shown in FIG. 1 so as to face the vicinity of the upper end of the hammer shank 5b. Yes. As shown in FIG. 2, the stop rail 16 is composed of a high-frequency range rail 22, a mid-range range rail 23, and a low-range range rail 24, which are arranged in the left-right direction. The treble rail 22 has a rectangular main body portion 22a extending in the left and right and front and rear directions, two attachment portions 22b and 22b provided at the left and right ends of the main body portion 22a, and a right angle downward from the front end of the main body portion 22a. It is comprised by the bending part 22c bent in the direction. Each attachment portion 22b is formed with two front and rear long holes 22d and 22d, and each long hole 22d extends in the front-rear direction. A cushion material 25 made of an elastic material such as rubber is attached to the front surface of the bent portion 22c.

  The mid-range rail 23 includes a rectangular first main body 23a extending in the left-right and front-rear directions, a rectangular second main body 23b extending obliquely upward from the left end of the first main body 23a, and the first main body 23a. A first mounting portion 23c provided at the right end portion, a second mounting portion 23d extending downward from the left end of the second main body portion 23b and extending leftward from the lower end thereof, and the first and second main body portions 23a and 23b. Each of the bent portions 23e and 23e bends at a right angle downward from the front end.

  In this way, unlike the high sound range rail 22, the middle sound range rail 23 is configured by the first main body portion 23a and the second main body portion 23b extending obliquely upward from the left end for the following reason. That is, as described above, the mid-range and low-range strings S extend in different directions so as to cross each other, and in the vicinity of the boundary between both ranges, as shown in FIG. In order to avoid contact between the mid-range damper 14 and the low-range damper 14 arranged in the above, the mid-range damper 14 is arranged at a position higher than that of the low-range side. Accordingly, in the vicinity of this boundary, the height of the hammer head 5c of the hammer 5 in the middle range is discontinuously higher than that on the low range side. The above-described configuration of the midrange rail 23 corresponds to the above-described discontinuous changes in the height of the hammer 5 and the damper 14 in the midrange near the boundary between the midrange and the low range. By providing the second main body portion 23b that is inclined with respect to the portion 23a, the mid-range rail 23 can be disposed between the hammer head 5c and the damper head 14c.

  The first and second mounting portions 23c and 23d are formed with two front and rear long holes 23f and 23f extending in the front-rear direction similarly to the respective mounting portions 22b of the high-frequency rail 22, and the bent portions 23e A cushion material 25 similar to the bent portion 22c of the high-frequency rail 22 is attached to the front surface.

  The low-frequency range rail 24 includes a main body portion 24a similar to the high-frequency range rail 22, two attachment portions 24b and 24b on both sides of the main body portion 24a, and a bent portion 24c that bends at a right angle downward from the front end of the main body portion 24a. Has been. Each attachment portion 24b is formed with two longitudinal holes 24d and 24d similar to those of the high-frequency rail 22, and a cushion material 25 is attached to the front surface of the bent portion 24c.

  As shown in FIGS. 2 and 3, the four connecting members 17 include three normal connecting members 26 (FIG. 3A) provided at both ends of the drive rod 15 and in the vicinity of the boundary of the high / midrange sound range. It is composed of a boundary connecting member 27 (FIG. 5B) provided near the boundary of the low sound range. These normal connection members 26 are for connecting the drive rod 15 to the high-frequency range rail 22, the high / mid-range range rails 22, 23, and the low-frequency range rail 24, respectively. As shown in FIG. 3A, each connecting member 26 includes a lower rod fixing portion 26a, an upper horizontal rail fixing portion 26b, and a vertical connecting portion connecting the rod fixing portion 26a and the rail fixing portion 26b. 26c. The rod fixing portion 26a includes two left and right plate portions 26d and 26d that are spaced apart from each other and a connecting plate portion 26e that connects the front ends of these plate portions 26d and 26d. Each plate portion 26d is formed with a U-shaped notch 26f for inserting the drive rod 15, and the notch 26f is closed at the front and open at the rear. A hole 26g is formed in the center of the connecting plate portion 26e. With this configuration, the normal connecting member 26 is fixed to the drive rod 15 by inserting the drive rod 15 into the notch 26 f from the rear and screwing the screw 34 into the drive rod 15 through the hole 26 g. .

  Two rails 26h and 26h are formed in the rail fixing portion 26b of the connecting member 26 on the high-frequency range side and the low-frequency range side. These holes 26h and the high-frequency side mounting portion 22b of the high-frequency range rail 22 are provided. With the long hole 22d and the long hole 24d of the low sound side mounting portion 24b of the low sound range rail 24 aligned, the fixing sound 28 (only one is shown) is screwed in, so that the high sound range rail 22 and the low sound range rail 24 are It is fixed to the rail fixing part 26b. Further, the rail fixing portion 26b of the connecting member 26 in the vicinity of the boundary of the high / midrange sound range has a larger width (length in the left-right direction) than the rail fixing portion 26b of the other connecting member 26, and the front and rear holes 26h , 26h are formed in a total of four in two rows on the left and right. Of these holes 26 h, the right hole 26 h is the long hole 22 d of the low sound side mounting portion 22 b of the high frequency range rail 22, and the left hole 26 h is the long hole of the high sound side first mounting portion 23 c of the mid sound range rail 23. The fixing sound 28 is screwed in the state of being respectively fitted to 23f, whereby the high sound range rail 22 and the mid sound range rail 23 are fixed to the rail fixing portion 26b and are connected to each other via the rail fixing portion 26b.

  On the other hand, the boundary connecting member 27 is for connecting the drive rod 15 to the mid-range rail 22 and the low-range rail 24. As shown in FIG. 3 (b), the connecting member 27, like the normal connecting member 26, has a lower rod fixing portion 27a, an upper horizontal rail fixing portion 27b, a rod fixing portion 27a and a rail fixing. It is comprised by the connection part 27c which connects the part 27b. Similarly to the rod fixing portion 26a, the rod fixing portion 27a includes two left and right plate portions 27d and 27d and a connecting plate portion 27e that connects the front ends of these plate portions 27d and 27d. Each plate portion 27d is formed with a U-shaped cutout 27f, and a hole 27g is formed in the center of the connecting plate portion 27e. The boundary connecting member 27 is fixed to the drive rod 15 by inserting the drive rod 15 into the notch 27f from the rear and screwing the screw 34 into the drive rod 15 through the hole 27g.

  Unlike the connecting portion 26c of the normal connecting member 26, the connecting portion 27c extends vertically at the lower half, bends the upper half from the upper end to the left, and extends obliquely upward. The reason why the connecting portion 27c bends in this way is as follows. That is, as described above, in the vicinity of the boundary of the mid-low range, the damper 14 on the mid-range side is arranged above that on the low-frequency range side, and therefore, as shown in FIG. This is because the upper half bent to the left of 27c is passed between them, avoiding the damper head 14c for the lowest sound on the middle sound side and the damper head 14c for the highest sound on the lower sound side.

  The rail fixing portion 27b is formed with a total of four front and rear holes 27h, 27h in two rows on the left and right. Of these holes 27 h, the right hole 27 h is the long hole 23 f of the second attachment portion 23 d on the low sound side of the midrange rail 23, and the left hole 27 h is the long hole of the high sound side attachment portion 24 b of the low sound rail 24. By screwing the fixing screws 28 into the respective 24d, the middle sound range rail 23 and the low sound range rail 24 are fixed to the rail fixing portion 27b and are connected to each other via the rail fixing portion 27b.

  As shown in FIG. 2, a spacer 29 is interposed between each mounting portion 22 b of the high-frequency rail 22 and the rail fixing portion 26 b of the normal connection member 26. The spacer 29 is for adjusting the height of the high-frequency rail 22, and is formed in a rectangular shape having substantially the same size as the mounting portion 22b and has a predetermined thickness. The spacer 29 has a hole 29a corresponding to the hole 26h of the rail fixing portion 26b.

  The drive mechanism 18 is disposed on the lower surface of the drive lever 30, the shelf plate 3, an operation lever (not shown) for operating the drive lever 30, a wire 31 connecting the drive lever 30 and the operation lever, and a drive The spring 30 is configured to bias the lever 30 upward.

  The drive lever 30 is made of, for example, a bent metal plate, and is provided at the end of the drive rod 15 on the low sound side. As shown in FIG. 2, the drive lever 30 is provided at a main body 30a extending in the front-rear direction, a rear end of the main body 30a, a fixing portion 30b extending leftward from the upper end, and a lower side from the left end of the fixing portion 30b. And a rising portion 30d which is provided at the front end of the main body 30a and extends leftward from the lower end and rises from the left end. A hole 30e is formed in the mounting portion 30c, and a hole 30f is formed at a position corresponding to the hole 30e at the rear end portion of the main body portion 30a. The drive rod 15 is fitted into these holes 30e and 30f. Yes. Further, a hole 30g is formed in the fixing portion 30b, and the drive lever 30 is fixed to the drive rod 15 by screwing a screw (not shown) into the drive rod 15 through the hole 30g. A slit 30h is formed in the rising portion 30d, and the wire 31 is inserted into the rising portion 30d through the slit 30h. Further, the wire 31 is in a state of being prevented from coming off from the drive lever 30 by a head portion 31a provided at one end portion thereof.

  One end of the spring 32 is hooked on the upper end of the center of the drive lever 30, and the other end is hooked on the plate 33. The spring 32 always urges the drive lever 30 upward. The plate 33 is fixed to the center rail 11.

  According to the drive mechanism 18 configured as described above, the drive lever 30 is rotated counterclockwise in FIG. 2 by the urging force of the spring 32 when the operation lever is not operated. The drive rod 15, the stop rail 16 and the connecting member 17 integrated with 30 are also rotated counterclockwise, whereby the stop rail 16 is retracted from the rotation range of the hammer shank 5b (in FIG. 1). (Solid line position). In this state, the connecting portions 26c and 27c of the connecting members 26 and 27 near the boundary between the high and middle sound ranges are partially between the corresponding damper blocks 14e and 14e of the two adjacent dampers 14 and 14. It has entered. When the operating lever is operated from this state, the wire 31 is pulled down, and the driving lever 30 is rotated downward against the urging force of the spring 32, and the driving rod 15 and the like integrated therewith are shown in FIG. By rotating in the direction, the stop rail 16 is held at the entry position (dotted line position in FIG. 1) that has entered the rotation range of the hammer shank 5b. In this state, the connecting portions 26c and 27c are retracted from between the damper blocks 14e and 14e.

  Next, the operation of the silencer 1 having the above configuration will be described. When performing in the normal performance mode, the stop rail 16 is rotated to the retracted position by operating the operation lever of the drive mechanism 18. In this state, when the key 4 is pressed, the key 4 rotates about the balance pin 7 in the clockwise direction of FIG. 1, and the whippen 9 rotates counterclockwise along with this rotation. As the whippen 9 rotates, the jack 10 moves upward together with the whippen 9, and the push-up portion 10a pushes up the bat 5a, whereby the hammer 5 rotates counterclockwise. During the rotation, the jack 10 is detached from the bat 5a, and immediately after that, the hammer head 5c strikes the string S. Further, as the wippen 9 rotates, the damper 14 rotates clockwise, and the damper wire 14 b comes into contact with the cushion material 21 of the drive rod 15.

  On the other hand, when performing in the mute performance mode, the stop rail 16 is rotated to the entry position by operating the operation lever of the drive mechanism 18. When the key 4 is depressed, the hammer 5 rotates counterclockwise in the same manner as in the normal performance mode. In the middle of this rotation, immediately before the hammer head 5c hits the string S, the hammer shank 5b comes into contact with the stop rail 16 located at the entry position via the cushion material 25 at the upper end thereof, thereby causing the hammer 5 Is prevented from further rotation, thereby preventing string striking.

  As described above, according to the present embodiment, the high-frequency range rail 22, the mid-range range rail 23, and the low-frequency range rail 24 are connected to the drive rod 15 via the respective connecting members 17, so Regardless of the difference in size and the height of the hammer head 5c, the height of the stop rail 16 and the position in the front-rear direction with respect to the hammer shank 5b are set to the high-frequency rail 22 and the mid-range rail by the connecting members 17 in all sound ranges. 23 and the bass range rail 24 can be set finely. Therefore, the rotation of the hammer 5 in the mute performance mode can be prevented at an appropriate timing at an appropriate height of the upper end portion of the hammer shank 5b regardless of the sound range, and the hammer shank 5b when contacting the stop rail 16 can be prevented. It is possible to reliably prevent the string S from being hit by the hammer 5 while suppressing the bending. Moreover, since it is only necessary to connect the drive rod 15 and the stop rail 16 with the connecting member 17, the silencer 1 can be realized with a relatively simple configuration.

  Further, since the connecting members 26 and 27 in the vicinity of the boundary between the high and middle sound ranges are arranged so as to enter between the damper blocks 14e and 14e, the damper block 14e is connected to the connecting member as the damper 14 rotates. It is possible to prevent the collision with 26 and 27. As a result, it is possible to avoid generation of noise and malfunction of the damper 14 due to the noise.

  The stop rail 16 and the connecting member 17 are fixed by a fixing screw 28 through elongated holes 22d, 23f, 24d formed in the stop rail 16 and extending in the front-rear direction. Therefore, the position of the stop rail 16 in the front-rear direction with respect to the hammer shank 5b can be finely adjusted by these long holes 22d, 23f, and 24d, and the rotation of the hammer 5 can be prevented at an optimal timing.

  Further, a spacer 29 is interposed between the high sound range rail 22 and the connecting member 17. Therefore, the height of the treble rail 22 with respect to the hammer shank 5b can be finely adjusted by the thickness and number of the spacers 29, and the rotation of the hammer shank 5b is prevented at the optimum height of the upper end portion thereof. Can do.

  Further, when the rotating damper 14 comes into contact with the cushion material 21 attached to the surface of the drive rod 15, the impact at that time can be absorbed. Further, since the damper rail can be omitted by attaching the cushion material 21 to the drive rod 15, the number of parts can be reduced accordingly.

  FIG. 5 shows a modification of the connecting member. In the embodiment described above, the connecting member 17 is configured separately from the drive rod 15, whereas in this modification, the connecting member 41 is configured integrally with the drive rod 15. The connecting member 41 includes a main body portion 42 extending upward from the surface of the drive rod 15 and a rail fixing portion 43 extending forward from the upper end of the main body portion 42. The rail fixing portion 43 includes the same as the embodiment. The front and rear holes 44 and 44 for fixing the stop rail 16 are formed. According to this configuration, since the connecting member 41 is configured integrally with the drive rod 15, the number of parts and the number of assembly steps can be reduced as compared with the embodiment, and the manufacturing cost can be reduced correspondingly.

  In addition, this invention can be implemented in various aspects, without being limited to the described embodiment. For example, in the embodiment, the stop rail 16 is configured by three high-frequency rails 22, a middle-frequency rail 23, and a low-frequency rail 24 divided for each sound range. In this case, the stop rail 16 is formed in a shape that can be passed between the hammer head 5c of the hammer 5 and the damper head 14c of the damper 14 in all sound ranges. Is done. In the embodiment, the long holes 22d, 23f, and 24d are formed in the stop rail 16. However, the present invention is not limited to this, and may be formed in the connecting member 17. In the embodiment, the front and rear two long holes 22d, 23f, 24d and the holes 26h, 27h are formed in the stop rail 16 and the connecting member 17, respectively. Good.

  Furthermore, in the embodiment, the spacer 29 is interposed between the high sound range rail 22 and the connecting member 17, but is also interposed between the middle sound range rail 23 or the low sound range rail 24 and the connecting member 17 as necessary. You may let them. Further, in the embodiment, the connecting portion 26c of the normal connecting member 26 extends vertically straight. However, the present invention is not limited to this, and depending on the arrangement of the hammer 5 and the damper 14, the connecting portion 26c may be appropriately arranged in the front-rear direction and the left-right direction. It may be slanted or bent.

  Furthermore, although the embodiment is an example in which the present invention is applied to a muffler piano, the present invention is not limited to this and can be applied to other types of upright pianos such as an automatic performance piano. In addition, it is possible to appropriately change details within the scope of the gist of the present invention.

It is a figure which shows schematic structure of the silencer by embodiment of this invention, and the silencer to which this is applied. It is a disassembled perspective view of the silencer of FIG. It is each perspective view of the connection member for (a) normal use of FIG. 1, and (b) crossing. FIG. 3 is an enlarged view of the vicinity of a boundary between a middle sound range and a low sound range in FIG. 2. It is a fragmentary perspective view which shows the modification of a connection member. It is a side view of the silencer piano which applied the conventional silencer.

Explanation of symbols

1 Silencer 2 Silencer piano (upright piano)
4 Key 5 Hammer 5b Hammer Shank 14 Damper 15 Drive Rod 16 Stop Rail 17 Connecting Member 18 Drive Mechanism 21 Cushion Material 22 High-Sound Range Rail 22d Long Hole 23 Mid-Sound Range Rail 23f Long Hole 24 Low-Sound Range Rail 24d Long Hole 26 Normal Connection Member 26h Hole 27 Boundary connecting member 27h Hole 28 Fixing screw 29 Spacer S String

Claims (6)

In an upright piano that rotates a hammer having a damper and a hammer shank extending in the vertical direction in accordance with the rotation of a key extending in the front-rear direction, stringing of the string by the hammer is permitted in a normal performance mode. An upright piano silencer that blocks when in the mute performance mode,
A drive rod disposed between the damper and the hammer shank, extending in the left-right direction, and rotatable about an axis;
A stop rail disposed above the drive rod between the damper and the hammer and extending in the left-right direction so as to face the vicinity of the upper end of the hammer shank;
A connecting member extending between the drive rod and the stop rail and connecting the drive rod and the stop rail;
A drive mechanism for driving the drive rod to rotate the stop rail with respect to a rotation range of the hammer shank via the connecting member;
An upright piano silencer characterized by comprising: The stop rail is composed of a plurality of stop rails arranged in the left-right direction,
The silencer for an upright piano according to claim 1, wherein the connecting member includes a plurality of connecting members that connect the plurality of stop rails to the drive rod, respectively. Each of the dampers has a damper block and includes a plurality of dampers arranged in the left-right direction.
The silencer for an upright piano according to claim 1 or 2, wherein the connecting member is disposed between the damper blocks of two adjacent dampers. The stop rail and the connecting member each have a fixing hole,
One of these holes is a long hole extending in the front-rear direction,
The silencer for an upright piano according to any one of claims 1 to 3, further comprising a fixing screw that passes through these holes and fixes the stop rail to the connecting member. The stop rail and the connecting member are connected in a state of overlapping in the vertical direction,
The silencer for an upright piano according to any one of claims 1 to 4, wherein a spacer for adjusting the height of the stop rail is interposed between the stop rail and the connecting member. apparatus.   The cushion material which contacts when the said damper rotates with the rotation of the said key is attached to the damper side surface of the said drive rod, The Claim 1 thru | or 5 characterized by the above-mentioned. The upright piano silencer described.

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