CN202922168U - Automatic press-in machine for piano chord axis - Google Patents

Automatic press-in machine for piano chord axis Download PDF

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Publication number
CN202922168U
CN202922168U CN 201220593581 CN201220593581U CN202922168U CN 202922168 U CN202922168 U CN 202922168U CN 201220593581 CN201220593581 CN 201220593581 CN 201220593581 U CN201220593581 U CN 201220593581U CN 202922168 U CN202922168 U CN 202922168U
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CN
China
Prior art keywords
peg
pendulum
leaf
trichidium
fixed
Prior art date
Application number
CN 201220593581
Other languages
Chinese (zh)
Inventor
郭学成
Original Assignee
北京东奇众科技术有限公司
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Filing date
Publication date
Application filed by 北京东奇众科技术有限公司 filed Critical 北京东奇众科技术有限公司
Priority to CN 201220593581 priority Critical patent/CN202922168U/en
Application granted granted Critical
Publication of CN202922168U publication Critical patent/CN202922168U/en

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Abstract

An automatic press-in machine for piano chord axis comprises a chord axis press-in mechanism and a rotating hopper mechanism, wherein the rotating hopper mechanism comprises a fixation rack, a chord axis feeding hopper, a swinging leaf, a swinging leaf seat and a rotating cylinder, a back cushion is arranged at the discharge opening end of the chord axis feeding hopper, and an optical fiber sensor is arranged on one side below the back cushion; the swinging leaf is arranged below the chord axis feeding hopper, the swinging leaf is provided with a slide track in the radial direction, and the slide track is aligned with the discharge opening of the chord axis feeding hopper; the swinging leaf is provided with a chute in the circumferential direction, the chute is communicated with the slide track, and a friction plate is arranged on the outer side of the chute; the swinging leaf seat is fixed at the bottom end of the fixation rack and connected with the swinging leaf through a rotating shaft, the top end of the swinging leaf seat is an arc-shaped surface and provided with a guide groove corresponding to a chord axis hole in the chord pin block; a rotating cylinder is fixed on the fixation rack and connected with the swinging leaf through an oscillating shaft. In the utility model, the position of a chord hang hole in the chord axis can be detected through an optical fibre sensor, the friction plate is adopted for ensuring the direction required by the chord hang hole, automation of chord axis pressing in can be achieved, and the processing efficiency and accuracy are improved.

Description

Piano peg automatic press machine
Technical field
The utility model relates to a kind of piano peg automatic press machine, realizes the automation control that the piano string axial compression enters.
Background technology
The piano peg is the vitals of adjusting string tension force, keeping the piano accuracy in pitch.A threaded end of piano peg hammers into the peg hole by impact and becomes " tight fit " (interference 0.4~0.6mm) with string shaft (hardwood multi-layer sheet).And be not orthogonal between piano peg and string shaft, need to be certain angle of inclination (being generally 5~7 °).Have the string hanging hole on the piano peg, string is fixed on peg by this string hanging hole, string fixing to this string hanging hole towards corresponding requirement is also arranged.Therefore, peg has and there is no correct nail musical note stable most important condition whether after being the determination date in string shaft.
In traditional handicraft, general by manually the piano peg being squeezed in string shaft, first strike again with hammer and twist with spanner, or the artificial aligned position of simple and easy hydraulic press is pressed into.And this manually-operated is subjected to the line of force to be difficult to approach with the peg centerline hole overlap, each is inhomogeneous to extruding to make string shaft and peg, thereby peg moment of torsion scattered error (is generally 14~22NM) greatly, peg tension when causing temperament, be difficult to satisfy requirement on machining accuracy, or cause peg electroplating surface damage layer, and easily damage string shaft, can not guarantee product quality, and inefficiency.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, uses Numeric Control Technology, provide a kind of simple in structure, machining accuracy is high, crudy good, can realize the piano peg automatic press machine that automation is controlled.
For achieving the above object, the utility model is by the following technical solutions:
A kind of piano peg automatic press machine comprises peg pressing mechanism and revolving hopper mechanism, and this revolving hopper mechanism comprises fixed mount, peg feed hopper, pendulum leaf, pendulum trichidium and rotary cylinder,
The peg feed hopper is fixed on fixed mount, and its discharge port end is provided with a headrest, and is provided with a Fibre Optical Sensor on the position of a side below this headrest, and this headrest is controlled one in the cubic terrace with edge of peg end facing to this Fibre Optical Sensor;
This pendulum leaf is located at the below of the discharging opening of peg feed hopper, and this pendulum leaf radially is provided with slideway along it, and this slideway is aimed at the discharging opening of peg feed hopper; The pendulum leaf is provided with chute at circumferencial direction, and this chute is communicated with slideway, is provided with a friction plate in the outside of this chute;
The pendulum trichidium is fixed on the bottom of fixed mount, and connects the pendulum leaf by a rotating shaft, and curved of its top also is provided with the guide groove corresponding with the peg hole on string shaft;
Rotary cylinder is fixed on fixed mount, and is connected with the pendulum leaf by swinging axle, can drive the pendulum leaf and be rocked to around the pendulum trichidium position that the slideway aligning of leaf is put the guide groove of trichidium;
Peg falls in the slideway of pendulum leaf from the discharging opening of peg feed hopper, and its low side just is against the top of pendulum trichidium, and the light of Fibre Optical Sensor is corresponding to the position at peg string hanging hole place;
When light misalignment string hanging hole, do not eject friction plate, swing leaf by rotary cylinder, peg is sent in the guide groove of pendulum trichidium; When the string hanging hole on light aligning peg, eject friction plate, swing leaf by rotary cylinder, friction peg sidewall is adjusted peg string hanging hole to correct position in swing process, sends into subsequently in the guide groove of putting trichidium; Start the peg pressing mechanism and peg is pressed into the precalculated position of string shaft.
Described peg pressing mechanism comprises cylinder and depression bar, controls depression bar by cylinder peg discontinuity is pressed into.
Described friction plate is fixed on an end of a support bar, and the other end of this support bar is fixed on fixed mount, and friction plate supported on both sides bar is respectively by compression spring and dog screw Connection Bracket.
Above-mentioned everything is controlled by digital control servo system.
The utility model has the advantage of:
The utility model detects the direction of peg string hanging hole by Fibre Optical Sensor, thereby judge whether that the starting friction sheet adjusts the position that peg enters the peg hole, guarantee that peg navigates in the peg hole accurately, then start the peg pressing mechanism peg is pressed in the peg hole, realized the automation that peg is pressed into.
The utility model can guarantee to the full extent that peg is pressed into approached with the peg centerline hole by the line of force to overlap, thereby each approaches consistent to extruding force to peg to reach string shaft, the moment of torsion scattered error of peg approaches minimum, the moment of torsion scattered error of peg can be reduced to below 17NM, has improved working (machining) efficiency and precision.
Description of drawings
Overall structure schematic diagram when Fig. 1 is the utility model use.
Fig. 2 is the structural representation of revolving hopper of the present utility model mechanism.
Fig. 3 is the top view of Fig. 2.
The specific embodiment
As shown in Figure 1, piano peg automatic press machine of the present utility model comprises peg pressing mechanism 1 and revolving hopper mechanism 2, wherein, revolving hopper mechanism 2 comprises fixed mount 3, peg feed hopper 4, pendulum leaf 5, pendulum trichidium 6 and rotary cylinder 7, and peg feed hopper 4 is fixed on fixed mount 3.
As shown in Figure 2, structural representation for revolving hopper mechanism 2, wherein the discharge port end of peg feed hopper 4 is provided with a headrest 8, and is provided with a Fibre Optical Sensor 9 on the position of a side below this headrest 8, and this headrest 8 is controlled one in the cubic terrace with edge of peg end facing to this Fibre Optical Sensor 9;
This pendulum leaf 5 is located at the below of peg feed hopper 4 discharging openings, and this pendulum leaf 5 radially is provided with slideway 10 along it, and this slideway is aimed at the discharging opening of peg feed hopper 4; Pendulum leaf 5 is provided with chute 11 at circumferencial direction, and this chute 11 is communicated with slideway 10, is provided with a friction plate 12 in the outside of this chute 11;
Pendulum trichidium 6 is fixed on the bottom of fixed mount 3, and connects pendulum leaves 5 by a rotating shaft 13, and curved of its top also is provided with the guide groove 14 corresponding with the peg hole on string shaft;
Rotary cylinder 7 is fixed on fixed mount 3, and is connected with pendulum leaf 5 by swinging axle 15, can drive the pendulum leaf and be rocked to around the pendulum trichidium position that the slideway aligning of leaf is put the guide groove of trichidium;
Peg falls in the slideway 10 of pendulum leaf from the discharging opening of peg feed hopper 4, and its low side just is against the top of pendulum trichidium 6, and the light of Fibre Optical Sensor is corresponding to the position at peg string hanging hole place.
As shown in Figure 3, friction plate 12 is fixed on an end of a support bar 16, and the other end of this support bar 16 is fixed on fixed mount 3, and the support bar of friction plate 12 both sides is respectively by compression spring 17 and dog screw 18 Connection Brackets.
When the utility model used in reality, at first from peg feed hopper output peg, peg was in the headrest effect falls into the slideway of pendulum leaf, and one in the cubic terrace with edge of peg end is facing to this Fibre Optical Sensor at this moment.The light of Fibre Optical Sensor is radiated on peg, when light does not pass through the string hanging hole, and the expression correct position, do not send signal, do not need to eject friction plate, directly drives swinging axle by rotary cylinder and will put the position that leaf is rocked to slideway aligning guide groove, peg is immediately in guide groove; Start the peg pressing mechanism and peg is pressed into the precalculated position of string shaft.When light passes through the string hanging hole, the expression malposition sends signal and ejects friction plate, drives in the process of swinging axle swing pendulum leaf at rotary cylinder, friction plate friction peg sidewall is adjusted to correct position with peg string hanging hole, sends into subsequently in the guide groove of pendulum trichidium; Start the peg pressing mechanism and peg is pressed into the precalculated position of string shaft.
As shown in Figure 1, peg pressing mechanism 1 comprises hydraulic cylinder 19 and depression bar 20, can be pressed into by hydraulic cylinder-controlled superzapping pole pair peg discontinuity, at utmost guarantee to be pressed into and approached with the peg centerline hole by the line of force to overlap, each approaches unanimously to extruding force to peg thereby reach string shaft, and the moment of torsion scattered error of peg approaches minimum.

Claims (3)

1. piano peg automatic press machine is characterized in that: comprise peg pressing mechanism and revolving hopper mechanism, this revolving hopper mechanism comprises fixed mount, peg feed hopper, pendulum leaf, pendulum trichidium and rotary cylinder,
The peg feed hopper is fixed on fixed mount, and its discharge port end is provided with a headrest, and is provided with a Fibre Optical Sensor on the position of a side below this headrest, and this headrest is controlled one in the cubic terrace with edge of peg end facing to this Fibre Optical Sensor;
This pendulum leaf is located at the below of the discharging opening of peg feed hopper, and this pendulum leaf radially is provided with slideway along it, and this slideway is aimed at the discharging opening of peg feed hopper; The pendulum leaf is provided with chute at circumferencial direction, and this chute is communicated with slideway, is provided with a friction plate in the outside of this chute;
The pendulum trichidium is fixed on the bottom of fixed mount, and connects the pendulum leaf by a rotating shaft, and curved of its top also is provided with the guide groove corresponding with the peg hole on string shaft;
Rotary cylinder is fixed on fixed mount, and is connected with the pendulum leaf by swinging axle, can drive the pendulum leaf and be rocked to around the pendulum trichidium position that the slideway aligning of leaf is put the guide groove of trichidium;
Peg falls in the slideway of pendulum leaf from the discharging opening of peg feed hopper, and its low side just is against the top of pendulum trichidium, and the light of Fibre Optical Sensor is corresponding to the position at peg string hanging hole place;
When light misalignment string hanging hole, do not eject friction plate, swing leaf by rotary cylinder, peg is sent in the guide groove of pendulum trichidium; When the string hanging hole on light aligning peg, eject friction plate, swing leaf by rotary cylinder, friction peg sidewall is adjusted peg string hanging hole to correct position in swing process, sends into subsequently in the guide groove of putting trichidium; Start the peg pressing mechanism and peg is pressed into the precalculated position of string shaft.
2. piano peg automatic press machine according to claim 1, it is characterized in that: described peg pressing mechanism comprises cylinder and depression bar, controls depression bar by cylinder peg discontinuity is pressed into.
3. piano peg automatic press machine according to claim 1, it is characterized in that: described friction plate is fixed on an end of a support bar, the other end of this support bar is fixed on fixed mount, and friction plate supported on both sides bar is respectively by compression spring and dog screw Connection Bracket.
CN 201220593581 2012-11-12 2012-11-12 Automatic press-in machine for piano chord axis CN202922168U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220593581 CN202922168U (en) 2012-11-12 2012-11-12 Automatic press-in machine for piano chord axis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220593581 CN202922168U (en) 2012-11-12 2012-11-12 Automatic press-in machine for piano chord axis

Publications (1)

Publication Number Publication Date
CN202922168U true CN202922168U (en) 2013-05-08

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103440855A (en) * 2013-08-21 2013-12-11 徐小亮 Linkage mechanism of nylon wire bonding machine
CN103440854A (en) * 2013-08-21 2013-12-11 徐小亮 Supporting seat of nylon wire bonding machine
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
CN103440853A (en) * 2013-08-21 2013-12-11 徐小亮 Nylon wire feeding mechanism of nylon wire bonding device
CN103440852A (en) * 2013-08-21 2013-12-11 徐小亮 Nylon wire bonding machine for piano
CN103440851A (en) * 2013-08-21 2013-12-11 徐小亮 Nylon wire bonding device for nylon wire bonding machine for piano
CN107225206A (en) * 2017-06-30 2017-10-03 太仓市华天冲压五金制品厂 A kind of feed device riveted for axle class
CN107234190A (en) * 2017-06-30 2017-10-10 太仓市华天冲压五金制品厂 A kind of production technology of speed-changing gear box
CN107335772A (en) * 2017-06-30 2017-11-10 太仓市华天冲压五金制品厂 A kind of feeding heating for riveting axle and auxiliary clinching method
CN107350366A (en) * 2017-06-30 2017-11-17 太仓市华天冲压五金制品厂 A kind of feeding for riveting axle and auxiliary clinching method
CN108687512A (en) * 2017-04-11 2018-10-23 鸿准精密模具(昆山)有限公司 Automatic assembling device

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103440852B (en) * 2013-08-21 2016-01-06 徐小亮 The sticky machine of a kind of piano
CN103440854A (en) * 2013-08-21 2013-12-11 徐小亮 Supporting seat of nylon wire bonding machine
CN103440855A (en) * 2013-08-21 2013-12-11 徐小亮 Linkage mechanism of nylon wire bonding machine
CN103440853A (en) * 2013-08-21 2013-12-11 徐小亮 Nylon wire feeding mechanism of nylon wire bonding device
CN103440852A (en) * 2013-08-21 2013-12-11 徐小亮 Nylon wire bonding machine for piano
CN103440851A (en) * 2013-08-21 2013-12-11 徐小亮 Nylon wire bonding device for nylon wire bonding machine for piano
CN103440856B (en) * 2013-09-17 2016-08-17 广州珠江钢琴集团股份有限公司 A kind of device for correcting piano string code and string code and the assembly method of soundboard
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
CN108687512A (en) * 2017-04-11 2018-10-23 鸿准精密模具(昆山)有限公司 Automatic assembling device
CN107225206A (en) * 2017-06-30 2017-10-03 太仓市华天冲压五金制品厂 A kind of feed device riveted for axle class
CN107335772A (en) * 2017-06-30 2017-11-10 太仓市华天冲压五金制品厂 A kind of feeding heating for riveting axle and auxiliary clinching method
CN107350366A (en) * 2017-06-30 2017-11-17 太仓市华天冲压五金制品厂 A kind of feeding for riveting axle and auxiliary clinching method
CN107234190A (en) * 2017-06-30 2017-10-10 太仓市华天冲压五金制品厂 A kind of production technology of speed-changing gear box
CN107225206B (en) * 2017-06-30 2019-02-01 太仓市华天冲压五金制品厂 A kind of feed device for the riveting of axis class
CN107335772B (en) * 2017-06-30 2019-03-01 太仓市华天冲压五金制品厂 It is a kind of rivet axis feeding heating and auxiliary clinching method
CN107234190B (en) * 2017-06-30 2019-10-11 太仓市华天冲压五金制品厂 A kind of production technology of speed-changing gear box

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