CN108831414B - Device for correcting string code of steel musical instrument and assembly method of string code and soundboard - Google Patents
Device for correcting string code of steel musical instrument and assembly method of string code and soundboard Download PDFInfo
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- CN108831414B CN108831414B CN201810541918.5A CN201810541918A CN108831414B CN 108831414 B CN108831414 B CN 108831414B CN 201810541918 A CN201810541918 A CN 201810541918A CN 108831414 B CN108831414 B CN 108831414B
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
- G10C9/00—Methods, tools or materials specially adapted for the manufacture or maintenance of musical instruments covered by this subclass
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Abstract
The invention discloses a device for correcting a string code of a steel musical instrument and an assembly method of the string code and a sound board, wherein the device comprises a light mould, a fixed frame and a correcting piece, wherein elastic layers are paved on two end edges of the bottom surface of the light mould, the bottom surface of the elastic layers is used for paving the sound board, the light mould is provided with a string code correcting groove at the position of the sound board corresponding to the string code, the contour of the string code correcting groove is consistent with the contour of the string code to be installed, two ends of the string code correcting groove are provided with glue injection pipe pins, and correcting holes are formed at intervals at the edges of the string code correcting groove; the fixing frame comprises a rectangular frame, a telescopic sleeve and a spring, two long rods of the rectangular frame are connected through the telescopic sleeve, the spring is arranged in the elastic frame, the correcting piece comprises a fixing base, a connecting rod is arranged on the fixing base, the connecting sleeve is sleeved on the connecting rod, the correcting piece further comprises an operating rod, an adjusting head is arranged at the upper end of the operating rod, and a limiting slideway is arranged on the operating rod; the assembly method of the string code and the soundboard is completed by the device.
Description
Technical Field
The invention relates to a device in the field of piano assembly, in particular to a device for correcting a string code of a piano and an assembly method of the string code and a soundboard.
Background
The piano resonance disk consists of a back frame, a soundboard, an iron plate, string codes and strings, and is a core component of the piano. The string code is an important component part of the resonance disk and is arranged on the soundboard of the piano. The string code is used for transmitting the energy of string vibration to the soundboard and beautifying the tone quality. String codes of an upright piano are divided into two branches of bass and mid-treble. The current semi-mechanical and semi-manual string yard processing flow is that (1) a string yard panel is processed by a hand electric planer, and the height of the string yard is planed according to the design requirement, and the string yard is approximately in the shape of an arch bridge with a high middle and two low ends; (2) printing a string code nail hole on a string code panel by using a locating hole tool, and then carefully drilling the code nail hole by placing the string code on an inclined tool supporting plate which is installed on a special drilling machine; (3) hand shoveling: manually driving string code nails by using a special cutter to shoveling a groove (4) with the bottom of the groove being radian to the outside by taking the connecting line of the sound board holes as a reference; (5) and mounting the string code on the soundboard according to the positioning tool. Therefore, the processing technology of the string code has very high requirements, and is a complex, fine and precise process, so that the string code processing process is defined as a key process for piano production.
However, the working procedure has high technical requirements, high labor intensity of manual operation, easy quality fluctuation, certain noise and dust generated in the processing process and poor working environment. According to the design requirement of the resonance disc, the requirement of multipoint accurate level difference exists between the string code and the iron plate, and the casting process of the iron plate determines whether the size of the iron plate can generate fine and unstable changes, and in order to correct the changes, a method for adjusting the height of the iron plate is generally adopted for remedying, but the rigidity of the iron plate is very large, and the adjustable space is limited, so even if the level difference exists between the string code and the iron plate, the string code cannot be processed for the second time so as to meet the drawing size. This is the biggest trouble in assembly caused by the conventional string code processing technology. The invention patent No. 201310426061.X discloses a device for correcting string codes of a steel musical instrument and an assembly method of string codes and a soundboard, wherein the device comprises a workbench and a plurality of clamping mechanisms arranged on the workbench, each clamping mechanism comprises a fixed ejector rod, a telescopic ejector rod and a telescopic mechanism, and the telescopic ejector rod is connected with the telescopic mechanism; the working end faces of the fixed ejector rods in the clamping mechanisms are distributed along the ideal contour surface of one side face of the string code, and the working end faces of the telescopic ejector rods in each clamping mechanism are opposite to the working end faces of the fixed ejector rods; and a positioning space for placing the string code is formed between the working end surface of the fixed ejector rod and the working end surface of the telescopic ejector rod. The device disclosed in this patent is complex in structure and inconvenient to use, and the device and method can correct only a portion of one string code, which is not accurate enough.
Disclosure of Invention
The technical scheme adopted for solving the technical problems is as follows: the invention comprises a light mould, a fixed frame and a correcting piece, wherein the light mould is of a cuboid shape, two end edges of the bottom surface of the light mould are paved with elastic layers, the bottom surface of the elastic layers is used for paving a sound board, the shape of the upper surface and the lower surface of the light mould is consistent with that of the sound board, the size of the upper surface and the lower surface of the light mould are the same as that of the sound board, a string code correcting groove is formed in the position, corresponding to the sound board, of the sound board, where a string code is installed, the outline of the string code correcting groove is consistent with that of the string code to be installed, glue injection pipe pins are arranged at two ends of the string code correcting groove, and correcting holes are formed at intervals at the edge of the string code correcting groove; the fixing frame comprises a rectangular frame, a telescopic sleeve and a spring, two long rods of the rectangular frame are connected through the telescopic sleeve, the two upper and lower rectangular frames are connected through four elastic frames in the vertical direction, the spring is arranged in the elastic frames, the correcting piece comprises a fixing base, a connecting rod is arranged on the fixing base, the connecting sleeve is sleeved on the connecting rod, the correcting piece further comprises a control rod, an adjusting head is arranged at the upper end of the control rod, a limiting slide way is arranged on the control rod, one end of the connecting sleeve is connected with the control rod through the limiting slide way, the rear lower end of the connecting sleeve penetrates through the control rod to be connected with a clamping sleeve, and a supporting piece is arranged on the clamping sleeve.
Further, a through hole for injecting glue is formed in the glue injection pipe pin, and the bottom end of the glue injection pipe pin is flat.
Further, the thickness of the light mold is 10-20 mm thicker than the thickness of the string code, the thickness of the elastic layer is 20mm when the elastic layer is not compressed, and the thickness of the elastic layer is 0.01-0.05 mm when the elastic layer is compressed.
Further, the length of the long side of the rectangular frame is the same as the length of the short sides of the upper surface and the lower surface of the corresponding light mold, the length of the elastic frame is 20mm shorter than the height of the upper surface and the lower surface of the corresponding light mold, the length of the spring is 10mm, and the stiffness coefficient is 10N/cm.
Further, the shape of the correcting hole is consistent with the shape of the cross section of the bottom end of the operating rod on the correcting piece and the cross section area is equal to the shape of the bottom end of the operating rod on the correcting piece.
Further, the control rod is provided with scales, and the adjusting head is provided with an offset angle calibrator.
Preferably, the lightweight mold includes a rim and a filler base, the rim and filler base being two different metals and the rim material having a plastic free transition temperature greater than the filler base material.
The assembly method of the string code and the soundboard is completed by the device for correcting the piano string code, and comprises the following steps: step 1, horizontally placing a soundboard on a workbench surface, and placing light molds on the soundboard in a completely overlapped manner; step 2, sleeving the fixed frame on the sound board which is completely overlapped with the light mould to enable the sound board and the light mould to be fixed into a whole, and compressing an elastic layer below the light mould to be below 0.05mm by a spring on the rectangular frame; step 3, injecting adhesive glue through the glue injection holes on the glue injection pipe pins, and moving the glue injection pipe pins along the string code correction grooves so that the adhesive glue is uniformly coated on the corresponding positions of the string codes on the soundboard; step 4, lifting the glue injection pipe pin, placing the string code into a string code correction groove on the light mold, enabling the string code to be correctly positioned on the soundboard, inserting the glue injection pipe pin, and fixing the string code on the soundboard; step 5, fixing a fixed base on the correcting piece on a vertical plane of the light mold, inserting an operating rod into the correcting hole, inserting a jacket into the string code correcting groove, compacting the string code, supporting the supporting piece on the other side of the string code correcting groove, and correcting the shape of the string code by using the operating rod and the adjusting head; step 6, driving screws according to preset screw connection points on the soundboard, and fixedly connecting the soundboard and the chord code together; and 7, taking out the fixed frame, bouncing the light mould by the elastic layer, taking down the light mould, and completing the assembly of the string code and the soundboard.
The invention has the advantages that the simple mechanical structure is utilized to fix the string code and the sound board, the cost is saved, the light mould of the device for correcting the string code of the piano is light in weight, the elastic layer is arranged below the light mould, the damage to the sound board and the string code is avoided, the relative positions of the sound board and the string code are not influenced when the light mould is taken down, the correction piece is provided with scales and the angle calibration can conveniently and rapidly correct the string code to a correct form, and the relative position relationship of the string code and the sound board after connection is ensured to be accurate; in addition, the string code correction slot can carry out omnibearing preliminary correction on the string code, and overcomes the defect of incomplete correction in the traditional technology; in addition, the invention can also improve the application range by controlling the temperature to change the specification of the string code correction groove.
Drawings
FIG. 1 is a schematic view of a light-weight mold and a fixed frame part according to an embodiment of the present invention.
Fig. 2 is a schematic view of a part of the structure of an correcting member according to an embodiment of the present invention.
Fig. 3 is a schematic view of a lightweight mold section according to a preferred embodiment of the invention.
In the figure:
1. light mould
1b, edge;
1a, filling base;
2. an elastic layer;
3. a soundboard;
4. a glue injection pipe pin;
5. a string code correction groove;
6. correcting the hole;
7. a fixed frame;
8. a rectangular frame;
9. a telescopic sleeve;
10. a spring;
11. a correcting member;
12. a fixed base;
13. connecting sleeves;
14. a jacket;
15. a joystick;
16. adjusting the head;
17. limiting slide ways;
18. a support;
19. an offset angle calibrator;
20. an elastic frame;
21. a connecting rod;
Detailed Description
In the embodiment, as shown in fig. 1-2, the invention comprises a light mould 1, a fixed frame 7 and a correcting piece 11, wherein the light mould 1 is in a cuboid shape, two end edges of the bottom surface of the light mould 1 are paved with elastic layers 2, the bottom surface of the elastic layers 2 is used for laying a soundboard 3, the shape of the upper surface and the lower surface of the light mould 1 is consistent with that of the soundboard 3, the size of the upper surface and the lower surface of the light mould 1 are the same as that of the soundboard 3, a string code correcting groove 5 is formed in the position of the soundboard 3 corresponding to the string code, the contour of the string code correcting groove 5 is consistent with that of the string code to be installed, the two ends of the string code correcting groove 5 are provided with rubber injection pipe pins 4, and the edges of the string code correcting groove 5 are provided with correcting holes 6 at intervals; the fixed frame 7 comprises a rectangular frame 8, a telescopic sleeve 9 and a spring 10, two long rods of the rectangular frame 8 are connected through the telescopic sleeve 9, the rectangular frames 8 on the upper side and the lower side are connected through four elastic frames 20 in the vertical direction, the spring 10 is arranged in the elastic frames 20, the correcting piece 11 comprises a fixed base 12, a connecting rod 21 is arranged on the fixed base 12, the connecting sleeve 13 is sleeved on the connecting rod 21, the correcting piece 11 further comprises an operating rod 15, an adjusting head 16 is arranged at the upper end of the operating rod 15, a limiting slide way 17 is arranged on the operating rod 15, and one end of the connecting sleeve 13 is connected with the operating rod 15 through the limiting slide way 17. The rear lower end of the connecting sleeve 13 passes through the operating rod 15 and is connected with a jacket 14, and a support piece 18 is arranged on the jacket 14.
Specifically, a through hole for injecting glue is formed in the glue injection pipe pin 4, and the bottom end of the glue injection pipe pin is flat. Specifically, the thickness of the light mold 1 is 10-20 mm thicker than the thickness of the string code itself, the thickness of the elastic layer 2 is 20mm when not compressed, and the thickness of the elastic layer is 0.01-0.05 mm when compressed.
Specifically, the length of the long side of the rectangular frame 8 is the same as the length of the short sides of the upper and lower surfaces of the corresponding light mold 1, the length of the elastic frame 20 is 20mm shorter than the height of the upper and lower surfaces of the corresponding light mold 1, the length of the spring 10 is 10mm, and the stiffness coefficient is 10N/cm. Specifically, the shape of the correction hole 6 is identical to the shape of the cross section of the bottom end of the lever 15 on the correcting member 11 and the cross sectional area is equal.
Specifically, the lever 15 is provided with a scale, and the adjustment head 16 is provided with an offset angle calibrator 19.
In addition, the assembly method of the string code and the soundboard in the invention is completed by using the device for correcting the piano string code, and comprises the following steps:
step 4, lifting the rubber injection pipe pin 4, placing the string code into a string code correction groove 5 on the light mold 1, enabling the string code to be correctly positioned on the soundboard, inserting the rubber injection pipe pin 4, and fixing the string code on the soundboard;
step 6, driving screws according to preset screw connection points on the soundboard, and fixedly connecting the soundboard and the chord code together;
and 7, taking out the fixed frame 7, bouncing the light mould 1 by the elastic layer 2, taking down the light mould 1, and completing the assembly of the string code and the soundboard 3.
In the concrete implementation, the outer contour of the light mould 1 is cut according to the outer contour of the soundboard 3, and the string code correction groove 5 in the light mould 1 is cut according to the outer contour of the string code, and the piano compound string code consists of a bass string code and a middle-high string code; the bass string code consists of a code bridge, a code and a filler strip, wherein the code bridge is a diametrically cut spruce solid board or a diametrically cut spruce composite board with more than two layers; the code is fixedly connected to the upper surface of the code bridge; the filler strip is made of spruce and has a thickness of 3-15 mm; the middle and high pitch string codes of the piano are connected into a whole by the middle and high pitch string codes, the spruce filler strip is partially embedded on the bottom surface of the middle pitch string code from the outer end of the middle pitch string code, and the thickness of the string code is 9-50 mm on the whole, so that the thickness of the light mould 1 is designed to be 10-20 mm thicker than that of the string code, the position of the string code can be conveniently fixed, the position of the string code can be conveniently corrected by the correcting piece 11, the elastic layer 2 is compressed to be less than 0.05mm, and the thickness of the light mould is negligible relative to that of the string code.
In a specific implementation, in a preferred embodiment, as shown in fig. 3, the light mold 1 includes a rim 1b and a filling base 1a, the rim 1b and the filling base 1a are made of two different metals, the plastic-free transition temperature of the rim 1b is greater than that of the filling base 1a, and the string code correction groove 5 is formed on the filling base 1a, so that the string code correction groove 5 in the filling base 1a can be modified by controlling the temperature before the ambient temperature reaches the plastic-free transition temperature of the filling base 1a, and at this time, the rim 1b still has no plastic property and can still preserve the original shape, so that the string code correction groove 5 can be designed with various specifications, thereby improving the application range of the light mold 1.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (8)
1. The device for correcting the string code of the steel musical instrument is characterized by comprising a light mould, a fixed frame and a correcting piece, wherein the light mould is cuboid, two end edges of the bottom surface of the light mould are paved with elastic layers, the bottom surface of the elastic layers is used for laying a soundboard, the shape of the upper surface and the lower surface of the light mould are consistent with the soundboard, the size of the upper surface and the lower surface of the light mould are the same as the soundboard, the light mould is provided with string code correcting grooves at positions, corresponding to the soundboard, of the positions where the string code is installed, the outline of the string code correcting grooves is consistent with the outline of the string code to be installed, glue injection pipe pins are arranged at two ends of the string code correcting grooves, and correcting holes are formed at intervals at the edges of the string code correcting grooves; the fixing frame comprises a rectangular frame, a telescopic sleeve and a spring, two long rods of the rectangular frame are connected through the telescopic sleeve, the two upper and lower rectangular frames are connected through four elastic frames in the vertical direction, the spring is arranged in the elastic frames, the correcting piece comprises a fixing base, a connecting rod is arranged on the fixing base, the connecting sleeve is sleeved on the connecting rod, the correcting piece further comprises a control rod, an adjusting head is arranged at the upper end of the control rod, a limiting slide way is arranged on the control rod, one end of the connecting sleeve is connected with the control rod through the limiting slide way, the rear lower end of the connecting sleeve penetrates through the control rod to be connected with a clamping sleeve, and a supporting piece is arranged on the clamping sleeve.
2. The device for correcting string codes of steel musical instrument according to claim 1, wherein the glue injection tube pin is internally provided with a through hole for glue injection, and the bottom end is flat.
3. A device for correcting a bridge according to claim 1, wherein the thickness of the lightweight mould is 10-20 mm thicker than the bridge itself, the thickness of the elastic layer when uncompressed is 20mm, and the thickness when compressed is 0.01-0.05 mm.
4. The apparatus for correcting a string code of a piano according to claim 1, wherein the long sides of the rectangular frame are the same as the lengths of the upper and lower short sides of the corresponding light mold, the length of the elastic frame is 20mm shorter than the upper and lower sides of the corresponding light mold, the length of the spring is 10mm, and the stiffness coefficient is 10N/cm.
5. The apparatus for correcting a string code according to claim 1, wherein the correcting hole has a shape conforming to the shape of the cross section of the bottom end of the lever on the correcting member and has an equal cross-sectional area.
6. The device for correcting a string code of a piano according to claim 1, wherein the lever is provided with scales, and the adjusting head is provided with an offset angle calibrator.
7. The apparatus for correcting a string code according to any one of claims 1 to 6, wherein the lightweight mold includes a rim and a filler base, the rim and the filler base being two different metals and a plastic-free transition temperature of the rim being greater than a plastic-free transition temperature of the filler base.
8. A method of assembling a bridge and a soundboard using the apparatus for correcting a piano bridge of any one of claims 1-7, comprising: step 1, horizontally placing a soundboard on a workbench surface, and placing light molds on the soundboard in a completely overlapped manner; step 2, sleeving the fixed frame on the sound board which is completely overlapped with the light mould to enable the sound board and the light mould to be fixed into a whole, and compressing an elastic layer below the light mould to be below 0.05mm by a spring on the rectangular frame; step 3, injecting adhesive glue through the glue injection holes on the glue injection pipe pins, and moving the glue injection pipe pins along the string code correction grooves so that the adhesive glue is uniformly coated on the corresponding positions of the string codes on the soundboard; step 4, lifting the glue injection pipe pin, placing the string code into a string code correction groove on the light mold, enabling the string code to be correctly positioned on the soundboard, inserting the glue injection pipe pin, and fixing the string code on the soundboard; step 5, fixing a fixed base on the correcting piece on a vertical plane of the light mold, inserting an operating rod into the correcting hole, inserting a jacket into the string code correcting groove, compacting the string code, supporting the supporting piece on the other side of the string code correcting groove, and correcting the shape of the string code by using the operating rod and the adjusting head; step 6, driving screws according to preset screw connection points on the soundboard, and fixedly connecting the soundboard and the chord code together; and 7, taking out the fixed frame, bouncing the light mould by the elastic layer, taking down the light mould, and completing the assembly of the string code and the soundboard.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810541918.5A CN108831414B (en) | 2018-05-30 | 2018-05-30 | Device for correcting string code of steel musical instrument and assembly method of string code and soundboard |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810541918.5A CN108831414B (en) | 2018-05-30 | 2018-05-30 | Device for correcting string code of steel musical instrument and assembly method of string code and soundboard |
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| CN108831414B true CN108831414B (en) | 2023-06-16 |
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Citations (6)
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|---|---|---|---|---|
| JPH1124653A (en) * | 1997-06-30 | 1999-01-29 | Kawai Musical Instr Mfg Co Ltd | Camber regulating device for piano soundboard and piano |
| CN101059955A (en) * | 2006-09-14 | 2007-10-24 | 上海钢琴有限公司 | Prestressed piano soundboard and its machining method |
| CN102737621A (en) * | 2011-04-01 | 2012-10-17 | 郭学成 | Automatic piano string code assembly technology and its special-purpose equipment |
| CN103440856A (en) * | 2013-09-17 | 2013-12-11 | 广州珠江钢琴集团股份有限公司 | Device for correcting piano string code and assembly method of string code harmonic plate |
| CN206975998U (en) * | 2017-04-28 | 2018-02-06 | 广州欧米勒钢琴有限公司 | A kind of piano string code |
| CN108039158A (en) * | 2017-12-29 | 2018-05-15 | 广州珠江恺撒堡钢琴有限公司 | Saddle correcting device |
-
2018
- 2018-05-30 CN CN201810541918.5A patent/CN108831414B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1124653A (en) * | 1997-06-30 | 1999-01-29 | Kawai Musical Instr Mfg Co Ltd | Camber regulating device for piano soundboard and piano |
| CN101059955A (en) * | 2006-09-14 | 2007-10-24 | 上海钢琴有限公司 | Prestressed piano soundboard and its machining method |
| CN102737621A (en) * | 2011-04-01 | 2012-10-17 | 郭学成 | Automatic piano string code assembly technology and its special-purpose equipment |
| CN103440856A (en) * | 2013-09-17 | 2013-12-11 | 广州珠江钢琴集团股份有限公司 | Device for correcting piano string code and assembly method of string code harmonic plate |
| CN206975998U (en) * | 2017-04-28 | 2018-02-06 | 广州欧米勒钢琴有限公司 | A kind of piano string code |
| CN108039158A (en) * | 2017-12-29 | 2018-05-15 | 广州珠江恺撒堡钢琴有限公司 | Saddle correcting device |
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