CN100538817C - Bar is played in the shake of grand piano - Google Patents
Bar is played in the shake of grand piano Download PDFInfo
- Publication number
- CN100538817C CN100538817C CNB2004800299840A CN200480029984A CN100538817C CN 100538817 C CN100538817 C CN 100538817C CN B2004800299840 A CNB2004800299840 A CN B2004800299840A CN 200480029984 A CN200480029984 A CN 200480029984A CN 100538817 C CN100538817 C CN 100538817C
- Authority
- CN
- China
- Prior art keywords
- bar
- shake
- played
- grand piano
- hammer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000835 fiber Substances 0.000 claims abstract description 32
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 14
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000013585 weight reducing agent Substances 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 21
- 210000002615 epidermis Anatomy 0.000 description 11
- 230000033228 biological regulation Effects 0.000 description 10
- 230000002787 reinforcement Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241000726768 Carpinus Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Landscapes
- Electrophonic Musical Instruments (AREA)
Abstract
Bar is played in the shake that the invention provides a kind of grand piano, and this shake is played bar and had shape retention and dimensional stability is good, in light weight, rigidity is high advantage, can stably obtain action required in view of the above, improves to impact performance continuously.Bar (4) is played in a kind of shake of grand piano, utilizes this shake to play and mentions hammer (30) This move after bar 4 can hit string, and this shake is played bar (4) and is made of the mechanograph that strengthens with long stapled thermoplastic resin that contains that adopts the long fibre method to be shaped.In addition, shake is played the cross section that bar (4) has the weight saving of making and is reduced portion (49,50,54).In addition, the long fibre that strengthens usefulness is made of carbon fibre, and thermoplastic resin is made of ABS resin.
Description
Technical field
Bar is played in the shake that the present invention relates to the grand piano of hammer being mentioned after beaing string in order to obtain continuously impacting property in acoustics grand piano etc.
Background technology
Comprise the general following formation of qin courage (action) that bar is played in shake in the grand piano.That is, the qin courage of grand piano is center and being provided with freely to rotate with the rearward end, comprises that the boat type bar at the rear portion that is arranged at key and the shake on the boat type that the is installed on bar free to rotate play bar (repetition lever) and lift bar formations such as (jack).Shake play bar with state that two strands of shape bar installation portions of boat type bar engages under be mounted and extend along fore-and-aft direction, hammer passes through handle roller (shank roller) to be settled thereon.The upper end of lifting bar is fastened on and is formed at shake and plays lifting in the bar guide hole on the bar, under bonded state, keep with the handle roller between small interval relative with it from the below.In addition, shake play bar and lift bar by repeat spring to the direction that resets by the application of force, from bonded state, lift that bar keeps the interval of regulation with respect to adjusting knob and relative with it from the below.
According to said structure, if key is pressed, to upper process, shake is played bar and is lifted bar and rotates upward with boat type bar by boat type bar.Along with their rotation, lift bar by handle roller jack-up hammer.Afterwards, turn to hammer will beat the time point of string of top the time, lift bar by engaging with adjusting knob and from the handle roller, coming off.Like this, the qin courage was released with being connected of key, and hammer hits string with free rotary state.Hit after the string, hammer is to backward rotation.
Afterwards, if key by from key, when key was back to specified altitude, shake was played bar by the elastic force that the repeats spring rotation that resets, and boosted hammer by the handle roller.Adopt this mode, lift bar under the elastic force effect that repeats spring and rotations that reset by entering handle roller downside, even key not exclusively returns, also can be guaranteed the carrying out that string moves that hit of next time, therefore, guaranteed impacting property continuously.
As above, it is to be used for after hitting string that bar is played in shake, by via the handle roller hammer being boosted, realizes impacting continuously the such parts that impact the performance method continuously of trill (trill) of same keys, and the same with other many qin courage parts, adopts timber to constitute in the past usually.This be because, timber has draws materials easily, processability is good, and in light weight, rigidity advantages of higher.Especially, play bar, not only require it light for shake, with adapt to key carry out the action that boosts of hammer constantly from the corresponding regulation of key, thereby responsiveness is well along with the rotating trippingly from key of key, and requires the rigidity height, thereby does not produce big distortion when boosting hammer.
In addition, play bar as the shake of prior art, known have a plastic product of employing, and for example patent documentation 1 is disclosed.This shake is played bar and is made of ABS resin etc., and is charged in order to prevent it, is provided with the dope layer of tool electric conductivity or metal level etc. at least from the teeth outwards.
As above-mentioned, play the material of bar as the shake of prior art, from taking into account viewpoints such as light weight and high rigidity, generally adopt timber.But with regard to it on the one hand, not only rigidity and weight can produce inequality owing to lack homogeneity as the timber of natural material, but also exist because residual stress etc. are easy to generate the shortcoming of distortion such as warpage and distortion.In addition, timber is because change in size is big according to doing wet, so the width that bar is played in shake stretches greatlyyer according to doing wet condition, result, and change by the gap between the bar installation portion of boat type bar plays the relative boat type of bar bar and fluffs sometimes thereby shake, and becomes puckery sometimes.More than itself distortion or and the bar installation portion between the variation in gap, it is unstable that the operation that may make shake play bar becomes.
On the other hand, if playing bar, shake adopt patent documentation 1 disclosed ABS resin to constitute, because shape retention and excellent size stability, and when not having above-mentioned various shortcoming when adopting timber, but also can have high-precision processing, can reduce advantage such as material cost.Yet ABS resin proportion is bigger than timber, and correspondingly, it is impaired that the brisk property of bar is played in shake, the action dull.In addition because the ABS resin rigidity is littler than timber, so since when mentioning hammer bending bigger, the moment of mentioning the action of hammer produces skew etc., thereby has lost the advantage when adopting timber to constitute, and impacts performance continuously and reduces.
The present invention proposes in order to solve this problem, and purpose provides a kind of shape retention and dimensional stability is good, in light weight, have high rigidity, can obtain stable action required in view of the above, make the shake of the grand piano that impacts the performance raising continuously play bar.
Patent document 1: the spy opens the 2003-5740 communique
Summary of the invention
In order to realize this purpose, the invention of technical scheme 1 is a kind ofly to hit the shake that can mention the grand piano of hammer action behind the string and play bar, it is characterized in that, is made of with the formed products of long stapled thermoplastic resin the reinforcement that contains of adopting that the long fibre method is shaped.
Above-mentioned long fibre method is meant, by injection molded, the particle that will contain the fibee reinforced material of the equal length that is covered by thermoplastic resin is shaped and obtains formed products.According to this long fibre method, and will merely contain staple fibre differently as the situation of the particle injection molded of strengthening material, in formed products, contain long fibee reinforced material.Therefore, shake of the present invention is played bar owing to contain long reinforcement long fibre, compares with the situation that synthetic resin such as only adopting ABS resin constitutes, and can obtain very high rigidity, can obtain the rigidity more than or equal to timber.Like this, can suppress to hit the bending that bar is played in shake when mentioning hammer behind the string, and can stably carry out the action of mentioning of hammer in the moment of regulation.In addition, the formed products that is shaped with the long fibre method is the same with monomer synthetic resin, shape retention and dimensional stability are good, so compare when adopting timber, can be suppressed very for a short time because shake is played distortion such as the warpage of bar self and distortion and done caused the stretching of wet condition.By above-mentioned, not only can stablize and shake the operation of playing bar, and can make and impact performance continuously and improve.
The scheme that technical scheme 2 relates to is to play bar in the shake of scheme 1 described grand piano to weigh, more than the long stapled length 0.5mm.
According to this structure,,, can guarantee to shake and play the required rigidity of bar so can obtain very high rigidity because contain the reinforcement long fibre of the above length of 0.5mm in the formed products.
In addition, scheme 3 is to play in the bar in the shake of scheme 1 or 2 described grand pianos, and long fibre is a carbon fibre.
Usually, for example glass fibre electric conductivity is higher with long fibre than other reinforcement for carbon fibre, therefore, as mentioned above, by carbon fibre is used with long fibre as reinforcement, can improving shake, to play rod guidance electrical, adopts this mode, can guarantee the static runaway that miscellaneous parts such as hammer produce because of friction, charged to prevent.Like this, can suppress to shake the sticking of dust of playing bar and periphery thereof, therefore, the action and the outward appearance of can well maintained shake playing bar.
In addition, what scheme 4 related to is to play in the bar in the shake of scheme 1 to 3 each described grand piano, and thermoplastic resin is an ABS resin.
Play on the bar in shake, in general, be equipped with and fall the bar epidermis miscellaneous parts such as (lever skin) of screw (drop screw) butt.On the one hand, ABS resin in thermoplastic resin be have higher fusible.Therefore, play the thermoplastic resin of bar,, can be easily come to play miscellaneous part such as bar mounting rod epidermis, can improve assembleability to shake by bonding if adopt ABS resin as constituting shake.
What scheme 5 related to is to play in the bar in the shake of scheme 1 to 4 each described grand piano, has the cross section that is used for weight reduction and reduces portion.
According to this structure, because reducing portion, the cross section make shake play bar, so can improve its brisk property by lightness.In addition, as above, in the present invention, because the long fibre that reinforcement is used has improved rigidity, so, also can guarantee required rigidity even reduced the cross section because of the cross section reduces portion.Like this, desired rigidity can be guaranteed, lightness to greatest extent can be realized again.Therefore, can further make and impact performance continuously and improve.In addition because shake plays bar and is shaped by injection molded, so can be easily when shaping and high precision this cross section that is shaped reduce portion.
Description of drawings
Fig. 1 plays (a) planimetric map, (b) outboard profile, (c) ground plan of bar for the shake of the grand piano of the invention process form.
Fig. 2 contains the outboard profile that Fig. 1 shakes the key board unit of the grand piano of playing bar.
Fig. 3 expresses the implosion test result that bar carries out and the figure of its comparative example is played in shake.
The part amplification profile of the A portion of Fig. 4 presentation graphs 1 (b).
The sectional view that Fig. 5 dissects for the V-V line along Fig. 1 (a).
Embodiment
Below with reference to accompanying drawings preferred example of the present invention is described in detail.In the following description, with the front side (right side of Fig. 2) of observing from the player of grand piano as " preceding ", inboard (left side of Fig. 2) as " back ", further, the transverse direction of key 2 is described as " left and right directions ".
At first, with reference to Fig. 1 bar 4 being played in shake describes.In this example, this shake is played bar 4 and is made of the formed products of the thermoplastic resin that adopts the long fibre method to be shaped, and for example, this mode of employing particle injection molded described as follows is shaped.This particle is to form like this, and it is directed under the state that applies regulation tension force to be about to the rove that carbon fibre will constitute, on one side the thermoplastic resin that contains rubber-like polymer as ABS resin extruded with extruder coated molded.According to this manufacturing process, the rove of carbon fibre can not fracture when particle was shaped, and can make in the rove of moulding to contain the carbon fibre of equal length with it.In this example, the length setting of particle is 5～15mm, like this, plays in the bar 4 in the shake of adopting this particle injection molded, contains the carbon fibre that length is 0.5～2mm.
As shown in Figure 1, shake is played bar 4 and is extended into shaft-likely along fore-and-aft direction, is equipped with central boat type bar installation portion 41 integratedly, forwards mentions portion 42 and bar button installation portion 43 with the handle roller that extend respectively at the rear from boat type bar installation portion 41.
Boat type bar installation portion 41 has width and certain highly basically square-section, portion in the central, and left and right directions connects ground and forms and bar 4 is played in shake be installed to mounting hole 44 on the boat type bar 3 (with reference to Fig. 2).
The width that the handle roller is mentioned portion 42 is bigger than boat type bar installation portion 41, and above-mentioned width becomes necessarily at first half with enlarging gradually towards the place ahead direction.In addition, the latter half of height that the handle roller is mentioned portion 42 is identical with the height of boat type bar installation portion 41, and on the other hand, the top of first half tilts to the curved shape in front lower place.Mention the first half of portion 42 at the handle roller, fore-and-aft direction is formed extended at both sides that above-below direction connects lifts bar pilot hole 45, becomes the epidermis installation portion 46 that is used for mounting rod epidermis 39 (with reference to Fig. 2) than the top leading section of its forward front side.
As shown in Figure 4, the handle roller is mentioned first half following following higher one section than latter half of of portion 42, like this, and in both downstairs of formation at the interface portions 56.In addition, the position contiguous with downstairs portion 56 front sides forms groove 57.This groove 57 the handle roller mention portion 42 about each lateral surface, extend across its whole above-below direction, the front and back edge part of each groove 57 is formed with graticule 57a, 57a.The relative handle roller with graticule 57a of groove 57 is mentioned the following of portion 42 and is roughly met at right angles, and the relative graticule 57a in the front of downstairs portion 56 keeps the minute angle of regulation and tilts.These downstairs portions 56 and graticule 57a as described later, relative shake play bar 4 adjust qin courages 1 lift the angle position of bar 5 time use as benchmark.
Further, on mentioning portion 42, does on the handle roller chamfering.Particularly, as shown in Figure 5, the left and right sides upper corner separately that constitutes the 45a of left and right sides wall portion, the 45a that lift bar pilot hole 45 forms chamfering when being shaped, form the 45b of R portion of 0.2mm～0.5mm.
Mention at the handle roller on the latter half of left and right side of portion 42, residual have periphery 48 and form the 1st recess 49 (only illustrating among the figure) of the portion that reduces as the cross section.More specifically, the 1st recess 49 comprises: from lift near rearward deepen successively the bar pilot hole 45 part 49a, from lower edge portion 48 upward up to its part 49b that deepens gradually and remaining part 49c midway with certain depth.Be provided with the projection 47 of triangle below the epidermis installation portion 46, also residual middle body below this projection 47 and about it, form the 2nd recess 50 (cross section reduces portion).In addition, the handle roller mention portion 42 below, form the ditch 52 that combines with an end of repetition spring 6 (with reference to Fig. 2).
On the other hand, bar button installation portion 43 has with the handle roller and mentions the roughly the same width of rearward end of portion 42 and the height roughly the same with boat type bar installation portion 41.In addition, the following rearward end of bar button installation portion 43 is the dip plane of oblique back upper place, and form so that this dip plane and top between the installation of the bar button 28 (with reference to Fig. 2) that tilts to connect with threaded hole 51.On the left and right side of bar button installation portion 43, residual its periphery 53 and form the 3rd recess 54 (only illustrating among the figure) of the portion that reduces as the cross section.Near the part of the 3rd recess 54 threaded hole 51 is more shallow, all has certain degree of depth of regulation.
Below, the structure of the qin courage 1 of bar 4 is played in the shake that contains said structure with reference to Fig. 2 describes.In a plurality of keys 2 (only illustrating 1) each is equipped with qin courage 1.As shown in the drawing, qin courage 1 comprises that boat type bar 3 free to rotate that fore-and-aft direction extends and the above-mentioned shake that is installed in freely to rotate on the boat type bar 3 play bar 4 and lift bar 5, between the carriage 21,21 about this qin courage 1 is installed on (only illustrating 1).About carriage 21,21 are fixed in the left and right end portions of the keyframe (not shown) of settling key 2 respectively, boat type bar track 22 is arranged between the carriage 21,21, and the rearward end of boat type bar 3 is installed in screw thread freely to rotate and is fixed on each boat type bar flange 24 on this boat type bar track 22.Via boat type bar heel 26, each boat type bar 3 places on the capstan winch button 25 at the upper surface rear portion that is arranged on corresponding key 2.
In addition, 23 extensions of hammer handle track are arranged between the left and right sides carriage 21,21.In this hammer handle track 23, a plurality of handle flanges 31 (only illustrating 1 among the figure) are fixing with screw 38, and hammer 30 is rotated and is supported in freely on each handle flange 31.Hammer 30 is by rotating hammer handle 32 on the handle flange 31 be installed in leading section freely, being installed on hammer head 33 on the end thereafter etc. and constituting.The following of hammer handle 32 is equipped with columned handle roller 37 at the assigned position place near front end.In addition, erectly be provided with back block material 10 on the rearward end of key 2, it is oppositely arranged from rear side and hammer 30.
Near lifting the bar pilot hole 45 on bar 4 is played in shake, hammer 30 is settled by handle roller 37.As shown in Figure 5, the width of handle roller 37 and the 45a of wall portion that lifts bar pilot hole 45, the distance between the 45a outer end is equal substantially, like this, under the state that lifts on the bar pilot hole 45, is arranged to occupy the 45a of wall portion at handle roller 37, the whole width of 45a.In addition, on the epidermis installation portion 46 of bar 4 is played in shake, can attach bar epidermis 39, this bar epidermis 39 with can be from the below screw-in handle flange 31 free to advance or retreat to fall screw 7 relative.According to this structure, fall screw 7 by turn, adjust to its overhang of transferring, can adjust shake play bar 4 by bar epidermis 39 with fall the time that screw 7 connects.
In addition, mention the 5a of portion pars intermedia at the hammer that lifts bar 5, the bar button screw 9 that lifts that is used to adjust the angle position of lifting bar 5 screws togather under the state that fore-and-aft direction connects free to advance or retreatly.At the leading section that lifts bar button screw 9, be provided with integratedly and lift bar button 12, this lifts bar button 12 and connects at the spring of being located on the boat type bar 3 with setting under bonded state 13.Therefore, this lifts bar button screw 9 and can adjust the angle position of lifting bar 5 that is under bonded state by turn.
As shown in Figure 4, this angular setting of lifting bar 5 is played on the bar 4 formed above-mentioned graticule 57a with shake or downstairs portion 56 carries out as benchmark.That is, with graticule 57a during, the graticule 57a of rear side and shake are played intersection point above the bar 4 as reference point B, make the back side 5c that lifts bar 5 consistent, lift bar button screw 9, lift the angle position that bar 5 is adjusted to regulation by turn with this reference point B as benchmark.Under this state,, can make the back side 5c that lifts bar 5 consistent with the front of downstairs portion 56 by the angular relationship between the front of above-mentioned graticule 57a and downstairs portion 56.Therefore, although with downstairs portion 56 as benchmark, make the back side 5c that lifts bar 5 consistent with its front, also can be adjusted into the angle position of regulation with lifting bar 5.To sum up, no matter adopt which of graticule 57a or downstairs portion 56, can adjust the angle position of lifting bar 5.
On the other hand, below hammer handle track 23, screw thread is fixed with adjustable track 40, below this adjustable track 40, be used to limit to lifting the adjusting knob 8 that rotates bar 5 tops and screwed togather free to advance or retreatly, and and the leading section of the adjusting knob abutting part 5b that lifts bar 5 keep the interval of stipulating and relative.
The operation of the qin courage 1 of said structure and the operation of above-mentioned prior art are roughly the same.That is, if by shown in Figure 2 from bonded state key 2 by button, then boat type bar 3 is raised by capstan winch button 25, by this way, when rotating upward, is installed on shake on the boat type bar 3 and plays bar 4 and lift bar 5 and also rotate upward.Along with this rotates, shake play bar 4 by bar epidermis 39 when falling screw 7 butts, lift bar 5 and mention hammer 30 by handle roller 37, make it to rotate upward.Afterwards, turn at hammer 30 and will impact the moment of opening the string S above being located at, lift bar 5 by engage with adjusting knob 8, come off from handle roller 37, like this, hammer 30 impacts string S from qin courage 1 and release key 2 is connected with free rotary state.
After hitting string S, hammer 30 rotation that resets is round about ended by back block material 10 cards.Afterwards, if key 2 quilts are removed the block of 10 pairs of hammers 30 of back block material from key, when key 2 turned back to the height of regulation, shake was played bar 4 and is left and fall screw 7, by repeating the elastic force of spring 6, reset to counter clockwise direction relative to boat type bar 3 and to rotate, by this way, mention hammer 30 by handle roller 37.Like this,, enter the downside of handle roller 37,, also can guarantee to carry out the next string that hits, can guarantee impacting property continuously even key 2 does not return fully by lifting bar 5 rotations that under the elastic force effect that repeats spring 6, reset.
As mentioned above, according to this example, because contain the reinforcement long fibre of longer carbon fibre of the 0.5～2mm that formed products constituted of the ABS resin that adopts long fibre method formed thereby, shake and play bar 4 and can obtain high rigidity, and obtain rigidity more than or equal to timber.Therefore, can suppress to hit the flexibility that bar 4 is played in the shake when mentioning hammer 30 behind the string, can stablely carry out the action of mentioning of hammer 30 in the moment of regulation.In addition, because equally with the synthetic resin of monomer have good shape retention and dimensional stability, so compare with adopting timber, shake is played deformation such as the warpage of bar 4 self and elastic force and owing to is done the flexible of wet condition and can be suppressed very for a short time.In a word, not only can stablize and shake the operation of playing bar 4, and can make and impact performance continuously and improve.
In addition, in this example, play the reinforcement long fibre that is contained in the bar 4 as shake, because the employing carbon fibre so improve the electric conductivity that bar 4 is played in shake, adopts this mode, can guarantee the static runaway that hammer 30 miscellaneous parts such as grade produce because of friction, charged to prevent.Like this, can suppress to shake the sticking of dust of playing bar 4 and periphery thereof, therefore, the action and the outward appearance of can well maintained shake playing bar 4.
Further, in this example, play the thermoplastic resin of bar 4 as constituting shake, have higher fusible ABS resin because adopt, can be easily by bonding and play the miscellaneous part of bar 4 mounting rod epidermises 39 and lining cloth etc. to shake, its assembleability is improved.
Fig. 3 is a figure, is used for representing simultaneously that this example plays test findings and the comparative example that the rigidity reinforcing effect of bar is confirmed to shake.The shake of comparative example is played bar and is made of timber (hornbeam hornbeam), and size and dimension is identical mutually in example and the comparative example.Test method is as follows: shake is being played under the state of supporting at the bar both ends, while from last direction wherein centre portion apply load and measure displacement, and calculate rigidity from the load at this moment and the relation of displacement.In addition, with regard to example and comparative example, provide the sample of a plurality of equal numbers respectively.Fig. 3 represents average separately its load-displacement relationship.
As shown in the drawing,, can see that the rigidity that bar is played in the shake of example relatively example increases 13% approximately according to this test findings, the rigidity of playing bar than wooden shake is quite a lot of greatly.In addition, although not shown,, also can see very little in the example for departing from of the rigidity of sample room.As mentioned above, in the material that adopts this example, under the identical condition of size and dimension, because can obtain big a lot of rigidity when wooden, so, the 1st～the 3rd recess 49,50,54 (cross section reduces portion) as described above formed in the bar 4 by playing in shake, not only can guarantee to play the identical rigidity of bar with the wooden shake that does not have described cross section to reduce the prior art of portion, and can realize lightness to greatest extent, like this, the double hit performance is improved.
In addition, the 45a of wall portion that lifts bar pilot hole 45 that bar 4 is played in shake is formed chamfering, on be mounted with the handle roller 37 of hammer 30, so, correspondingly reduce if the contact area of bar 4 is played in formation chamfering and shake, frictional resistance alleviates, and like this, can alleviate the dead load of key.Although scheme not shownly,, can find out that dead load is alleviated 1～3g according to this test findings.
In addition, the present invention is not defined in the example of explanation, but can implement with various forms.For example, in the example, although with adopt respectively ABS resin as thermoplastic resin, will to tie up carbon fibre be example as the reinforcement long fibre, also can adopt other suitable materials, for example, for the latter, can adopt glass fibre.In addition, in example, reduce portion,, paying the utmost attention to the occasion of rigidity, can omit such cross section and reduce portion although form the 1st～the 3rd recess 49,50,54 as the cross section that is used for shake is played the bar lightness.Further, in the example, be example although bar is played in the shake that the present invention uses with the acoustics grand piano, the present invention equally also plays in the bar applicable to the shake of other keyboard type pianotrons or automatic playing piano.In addition, in aim scope of the present invention, can make suitable change to the structure of detail section.
As mentioned above, the invention provides a kind of shake and play bar, utilize this shake to play bar and can obtain the repetition thump effect of grand piano, and be effective to make and impact performance continuously and improve so that can stably carry out required operation.
Claims (5)
1, bar is played in a kind of shake of grand piano, and it carries out the action of mentioning of hammer after hitting string,
It is characterized in that, this shake is played bar and is formed by containing the formed products that strengthens with long stapled thermoplastic resin, and this formed products is by the particle that contains the identical fibee reinforced material of the length that covered by thermoplastic resin is carried out the long fibre method shaping of injection molded.
2, bar is played in the shake of grand piano as claimed in claim 1, it is characterized in that, above-mentioned long stapled length is more than the 0.5mm.
3, bar is played in the shake of grand piano as claimed in claim 1 or 2, it is characterized in that, above-mentioned long fibre is a carbon fibre.
4, bar is played in the shake of grand piano as claimed in claim 1 or 2, it is characterized in that, above-mentioned thermoplastic resin is an ABS resin.
5, bar is played in the shake of grand piano as claimed in claim 1 or 2, it is characterized in that, has the cross section that is used for weight reduction and reduces portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003354274 | 2003-10-14 | ||
| JP354274/2003 | 2003-10-14 | ||
| JP006013/2004 | 2004-01-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1867964A CN1867964A (en) | 2006-11-22 |
| CN100538817C true CN100538817C (en) | 2009-09-09 |
Family
ID=37426168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800299840A Active CN100538817C (en) | 2003-10-14 | 2004-10-13 | Bar is played in the shake of grand piano |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100538817C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110517649A (en) * | 2019-02-20 | 2019-11-29 | 森兰信息科技（上海）有限公司 | Piano hammer and the method for making piano hammer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333531A (en) * | 2000-05-01 | 2002-01-30 | 雅马哈株式会社 | Sound damper made from synthetic resin containing powder and keyboard muscial instrument having same |
| JP2003005740A (en) * | 2001-06-19 | 2003-01-08 | Kawai Musical Instr Mfg Co Ltd | Action of piano |
| JP2003066951A (en) * | 2001-08-24 | 2003-03-05 | Kawai Musical Instr Mfg Co Ltd | Piano hammer and hammer wood |
-
2004
- 2004-10-13 CN CNB2004800299840A patent/CN100538817C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333531A (en) * | 2000-05-01 | 2002-01-30 | 雅马哈株式会社 | Sound damper made from synthetic resin containing powder and keyboard muscial instrument having same |
| JP2003005740A (en) * | 2001-06-19 | 2003-01-08 | Kawai Musical Instr Mfg Co Ltd | Action of piano |
| JP2003066951A (en) * | 2001-08-24 | 2003-03-05 | Kawai Musical Instr Mfg Co Ltd | Piano hammer and hammer wood |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110517649A (en) * | 2019-02-20 | 2019-11-29 | 森兰信息科技（上海）有限公司 | Piano hammer and the method for making piano hammer |
| CN110517649B (en) * | 2019-02-20 | 2020-08-25 | 森兰信息科技（上海）有限公司 | Piano hammer and method for manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1867964A (en) | 2006-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5547194A (en) | Golf club head | |
| US5575472A (en) | Golf putter head having face insert and method of forming the same | |
| KR101293402B1 (en) | Method and apparatus for elastic tailoring of golf club impact | |
| US7651408B2 (en) | Method and apparatus for elastic tailoring of golf club impact | |
| US20130267345A1 (en) | Golf club head with undercut | |
| WO2002015991A3 (en) | Metal wood type golf club head having expanded sections extending the ball striking face. | |
| US20030047061A1 (en) | Key for musical instrument | |
| CN1764491A (en) | Golf club head with actuating system | |
| CA2552585A1 (en) | Iron-type golf club head | |
| CN102201226B (en) | Keyboard apparatus | |
| US11786785B2 (en) | Golf club head | |
| CN100538817C (en) | Bar is played in the shake of grand piano | |
| US1299014A (en) | Golf-club. | |
| KR101032900B1 (en) | Action part for piano | |
| CN1672753A (en) | Putter | |
| US4995291A (en) | Action mechanism for the piano | |
| CN2636914Y (en) | Golf cube head with strengthening structure on top | |
| US6217459B1 (en) | Putter head assembly | |
| CN100555408C (en) | The mechanical hook-up that piano is used | |
| CN101166561A (en) | Tip plate for a billiards cue | |
| DE19644780C2 (en) | Keyboard musical instrument for playing or for finger exercises on the keyboard without acoustic sounds | |
| US4840101A (en) | Escapement mechanism for upright piano | |
| DE102004030576A1 (en) | Handle flange for a piano | |
| US7678977B2 (en) | Repetition lever of grand piano | |
| CN210909783U (en) | Spoon nail assembly tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |