Piano string winding machine

Abstract

The utility model discloses a piano string winding machine, relates to the field of musical instrument manufacturing, and aims to solve the problem that accurate matching cannot be completed by indirectly observing a tension change measurement result of a string to be wound by referring to the string. One end of a string to be wound is connected with the precise digital display spring exerciser, paired fixed pulley blocks are fixedly arranged on the outer wall of the end, away from the first base body, of the machine table, a soft pull rope penetrating through the fixed pulley blocks is fixedly connected to the outer wall of the second base body, and the gravity tensioning device is fixedly connected to the tail end of the rope. The second seat body can freely slide the pull rope and keep constant tension at the same time, so that the tension is prevented from being rapidly changed due to the fact that the tension of the string to be wound is too tight or too loose in a short time, the effect of good self-adaptability is achieved, the precise digital display tension device is directly connected with the string to be wound, and the change condition of the tension of the string to be wound can be accurately read.

Description

Technical Field

[0001] The utility model relates to the technical field of musical instrument manufacturing, in particular to a piano string winding machine. Background Art

[0002] In many years of piano manufacturing practice, it is found that the pronunciation effects of the low - pitched wound strings of the piano vary greatly through tuning for the same type and group of strings. Through long - term analysis of string winding, it is found that there are deficiencies in the parameter requirements of the string winding machine. It only has the wire tension and angle setting values, lacking the objective value of the tension of the key main core string. When winding the strings by randomly tightening the core string during operation, the tension of each string will inevitably be different. Even due to the low tension of the core string, when tuning and tightening, there will be a long neck of the winding wire, an elongated gap of the wire winding, resulting in a poor low - pitched sound effect.

[0003] An existing copper wire winding device for the low - pitched strings of a piano with a patent application number of 202222990041.2 adds a reference string parallel to the string to be wound. One end of the reference string is connected to a precision digital display tensiometer, and the other end is fixed to the other end of the string to be wound on the same movable seat body, so as to ensure that each low - pitched string maintains a unified tension when tightened and fixed on the winding device, and the low - pitched strings wound in this way can maintain basically the same pronunciation.

[0004] The above - mentioned existing technical solutions have the following defects: Although the reference string and the string to be wound are of the same material, it is very likely that there will be a quality gap between the two due to changes in the production process or different batches. Therefore, the measurement result of indirectly observing the tension change of the string to be wound through the reference string cannot be perfectly accurate. Even during the tension change process, the tension change of the winding string will be interfered by uneven load distribution, making it show a non - linear change state, which is not conducive to the system maintaining stability. Content of the Utility Model

[0005] The purpose of the utility model is to provide a piano string winding machine.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] It includes a machine platform and a wire winding mechanism. At both ends of the machine platform in the length direction, there are relatively arranged a first seat body and a second seat body respectively. The first seat body is fixedly connected to the machine platform. On the opposite end faces of the first seat body and the second seat body, there are coaxially arranged rotary chucks respectively. The two rotary chucks clamp the wire-waiting string. The second seat body is slidably connected to the top wall of the machine platform along the length direction of the machine platform. The rotary chuck is fixedly installed with a precision digital display tensiometer. One end of the wire-waiting string is connected to the precision digital display tensiometer. On the outer wall of the machine platform at the end far from the first seat body, there are fixedly arranged a pair of fixed pulley groups. A soft pull rope passing through the fixed pulley groups is fixedly connected to the outer wall of the second seat body. The end of the pull rope is fixedly connected with a gravity tensioning device.

[0008] By adopting the above technical solution, the gravity tensioning device can apply a constant tension to the wire-waiting string through the action of gravity. Compared with the moving driver using a cylinder, the second seat body can slide freely. Even if the length of the wire-waiting string changes during the copper wire winding process, it will not cause the tension of the wire-waiting string to be too tight or too loose in a short time, resulting in a sharp change in tension. It has good self-adaptability. At the same time, the precision digital display tensiometer is directly connected to the wire-waiting string, and can accurately read the change of the tension of the wire-waiting string. At the same time, the precision digital display tensiometer also has a very good error correction function. When the weight applied by the gravity tensioning device is quite different from that of the precision digital display tensiometer, it can be very intuitively known that the equipment has a fault, which is convenient for quickly carrying out rapid maintenance, ensuring that the wire-waiting string maintains a constant tension while maximizing the elimination of interference from other factors and ensuring the normal operation of the equipment.

[0009] Further, the gravity tensioning device includes a guiding plate fixedly connected to the outer wall of the machine platform. A vertical sliding groove is opened on the outer wall of the guiding plate. A sliding box body fixedly connected to the end of the pull rope is fitted and slidably arranged in the sliding groove. A placing groove is opened on the outer wall of the sliding box body, and a number of weights are placed inside the placing groove.

[0010] By adopting the above technical solution, the sliding box body slides freely along the sliding groove under the action of gravity, pulls the pull rope to drive the second seat body to slide away from the first seat body. Since the tension is always constant under the influence of gravity, the self-weight of the weights will determine the final tension. By adjusting the number and weight of the weights, the total mass of the weights can be adjusted to achieve the effect of independently adjusting the tension according to actual needs.

[0011] Further, a fitting convex strip arranged along the sliding direction is fixedly provided on the outer wall of the sliding box body, and a track groove for fitting the fitting convex strip is opened in the sliding groove.

[0012] By adopting the above technical solution, the fitting convex strip cooperates with the track groove to effectively limit the sliding box, and at the same time ensures that the sliding box body slides stably along the predetermined track for a long time, ensuring that the tension is always stable and constant.

[0013] Further, a protection plate covering the drawstring is disposed on a surface of the second base body close to the drawstring and extending therefrom.

[0014] By adopting the above technical solution, the protection plate has a good isolation effect, isolating and protecting the drawstring during the operation of the device, and preventing the surface tension of the string to be wound from changing violently under the influence of external forces during the operation of the device, thereby affecting the final quality of the fixed winding.

[0015] Further, a plurality of equally spaced threaded holes are disposed through the guiding plate along the sliding direction of the sliding box body, the threaded holes are aligned with the sliding box body, and positioning columns are threadedly connected to the threaded holes, and the positioning columns are provided to abut against the outer wall of the sliding box body.

[0016] By adopting the above technical solution, the threaded holes cooperate with the positioning columns to abut against the outer wall of the sliding box body, and the sliding box body can be effectively fixed in a short time through static friction, facilitating the installation of the string to be wound. At this time, the second base body is not under tension and can be moved freely to adapt to strings to be wound of different lengths, having a good positioning effect.

[0017] In summary, the beneficial technical effects of the present utility model are as follows:

[0018] 1. By adopting a precision digital display tensioner, a drawstring, and a gravity tensioning device, the second base body can freely slide the drawstring while maintaining a constant tension, thereby preventing the tension of the string to be wound from becoming too tight or too loose in a short time and causing a sharp change in tension, having a good self-adaptive effect;

[0019] 2. By adopting a placement groove and weights, the effect of autonomously adjusting the tension according to actual needs can be achieved by adjusting the total mass of the weights;

[0020] 3. By adopting a protection plate, the effect of preventing the surface tension of the string to be wound from changing violently under the influence of external forces during the operation of the device can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification, but do not constitute a limitation to the present utility model. In the drawings:

[0022] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0023] Figure 2 is Figure 2 an enlarged schematic diagram of the structure of part A in

[0024] Figure 3 is an exploded schematic diagram of the overall structure of the present utility model.

[0025] In the figure, 1 is a machine platform; 11 is a first base body; 12 is a second base body; 2 is a rotary chuck; 3 is a string to be wound with wire; 4 is a precision digital display tensioner; 5 is a fixed pulley set; 6 is a pulling rope; 7 is a gravity tensioning device; 71 is a guiding plate; 72 is a sliding groove; 73 is a sliding box body; 74 is a placing groove; 75 is a fitting rib; 76 is an orbital groove; 77 is a protection plate; 78 is a threaded hole; 79 is a positioning post; 8 is a weight; 9 is a wire winding mechanism. Detailed implementation manners

[0026] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1-3 , the present utility model provides a technical solution:

[0029] It includes a machine platform 1 and a wire winding mechanism 9. At both ends of the machine platform 1 in the length direction, there are relatively arranged a first seat body 11 and a second seat body 12 respectively. The first seat body 11 is fixedly connected to the machine platform 1. Rotating chucks 2 are arranged coaxially on the opposite end faces of the first seat body 11 and the second seat body 12. The two rotating chucks 2 clamp a wire-winding string 3 to be wound. The second seat body 12 is slidably connected to the top wall of the machine platform 1 in the length direction of the machine platform 1. A precision digital display tensioner 4 is fixedly installed on the rotating chuck 2. One end of the wire-winding string to be wound is connected to the precision digital display tensioner 4. On the outer wall of one end of the machine platform 1 away from the first seat body 11, a pair of fixed pulley groups 5 are fixedly arranged. A soft pull rope 6 passing through the fixed pulley groups 5 is fixedly connected to the outer wall of the second seat body 12. The end of the pull rope 6 is fixedly connected to a gravity tensioning device 7. Through the action of gravity, the gravity tensioning device 7 can apply a constant tension to the wire-winding string 3 to be wound. Compared with a moving driver using a cylinder, the second seat body 12 can slide freely. Even if the length of the wire-winding string 3 to be wound changes during the copper wire winding process, it will not cause the tension of the wire-winding string 3 to be too tight or too loose in a short time, resulting in a sharp change in tension. It has good self-adaptability. At the same time, the precision digital display tensioner 4 is directly connected to the wire-winding string 3 to be wound, and can accurately read the change of the tension of the wire-winding string 3. At the same time, the precision digital display tensioner 4 also has a very good error correction function. When the weight applied by the gravity tensioning device 7 is quite different from that of the precision digital display tensioner 4, it can be very intuitive to know that the equipment has a fault, which is convenient for quickly carrying out quick maintenance, so that while the wire-winding string 3 to be wound maintains a constant tension, other factors can be maximally excluded from interference to ensure the normal operation of the equipment.

[0030] The gravity tensioning device 7 includes a guiding plate 71 fixedly connected to the outer wall of the machine platform 1. A vertical sliding groove 72 is opened on the outer wall of the guiding plate 71. A sliding box body 73 fixedly connected to the end of the pull rope 6 is fitted and slidably arranged in the sliding groove 72. A placing groove 74 is opened on the outer wall of the sliding box body 73. A number of weights 8 are placed inside the placing groove 74. The sliding box body 73 slides freely along the sliding groove 72 under the action of gravity, pulling the pull rope 6 to drive the second seat body 12 to slide away from the first seat body 11. Since the tension is always constant under the influence of gravity, the self-weight of the weights 8 will determine the final tension. By adjusting the quantity and weight of the weights 8, the total mass of the weights 8 can be adjusted to achieve the effect of independently adjusting the tension according to actual needs.

[0031] A fitting convex strip 75 arranged along the sliding direction is fixedly provided on the outer wall of the sliding box body 73. A track groove 76 matching the fitting convex strip 75 is opened in the sliding groove 72. The fitting convex strip 75 cooperates with the track groove 76 to effectively limit the sliding box, and at the same time ensure that the sliding box body 73 slides stably along the predetermined track for a long time, ensuring that the tension is always stable and constant.

[0032] On one side of the second seat body 12 extending close to the pull rope 6, a protection plate 77 covering the pull rope 6 is arranged. The arrangement of the protection plate 77 has a good isolation effect, isolating and protecting the pull rope 6 during the operation of the equipment, and avoiding the surface tension of the string 3 to be wound from changing violently under the influence of external forces during the operation of the equipment, thus affecting the final quality of the fixed winding.

[0033] A plurality of equally spaced threaded holes 78 are arranged through the guide plate 71 along the sliding direction of the sliding box body 73. The threaded holes 78 are aligned with the sliding box body 73. A positioning post 79 is arranged in threaded connection with the threaded holes 78. The positioning post 79 abuts against the outer wall of the sliding box body 73. The threaded holes 78 cooperate with the positioning post 79 to abut against the outer wall of the sliding box body 73, and the sliding box body 73 can be effectively fixed in a short time through static friction, which is convenient for installing the string 3 to be wound. At this time, the second seat body 12 is not under tension and can be moved freely to adapt to strings 3 to be wound with different lengths, having a good positioning effect.

[0034] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent substitution on some of the technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A piano string winding machine, comprising a machine table (1) and a wire winding mechanism (9). At both ends of the machine table (1) along the length direction, there are respectively arranged a first seat body (11) and a second seat body (12) which are oppositely arranged. The first seat body (11) is fixedly connected to the machine table (1). On the opposite end faces of the first seat body (11) and the second seat body (12), there are respectively arranged rotating chucks (2) which are coaxially arranged. The two rotating chucks (2) clamp and set a piano string (3) to be wound with wire. The second seat body (12) is slidably connected to the top wall of the machine table (1) along the length direction of the machine table (1). It is characterized in that: The rotating chuck (2) is fixedly installed with a precision digital display tensiometer (4). One end of the string to be wound is connected to the precision digital display tensiometer (4). On the outer wall of the machine table (1) away from the first seat body (11), a pair of fixed pulley groups (5) are fixedly arranged. A soft pull rope (6) passing through the fixed pulley groups (5) is fixedly connected to the outer wall of the second seat body (12). The end of the pull rope (6) is fixedly connected with a gravity tensioning device (7).

2. The piano string winding machine according to claim 1, wherein: The gravity tensioning device (7) includes a guiding plate (71) fixedly connected to the outer wall of the machine table (1). A vertical sliding groove (72) is formed on the outer wall of the guiding plate (71). A sliding box body (73) fixedly connected to the end of the pull rope (6) is fitted and slidably arranged in the sliding groove (72). A placing groove (74) is formed on the outer wall of the sliding box body (73). A number of weights (8) are placed inside the placing groove (74).

3. The piano string winding machine according to claim 2, wherein: An engaging rib (75) arranged along the sliding direction is fixedly provided on the outer wall of the sliding box body (73). A track groove (76) for cooperating with the engaging rib (75) is formed in the sliding groove (72).

4. The piano string winding machine according to claim 3, characterized in that: A protection plate (77) covering the pull rope (6) is extended on one side of the second seat body (12) close to the pull rope (6).

5. The piano string winding machine according to claim 4, characterized in that: A number of equally spaced threaded holes (78) are arranged through the guiding plate (71) along the sliding direction of the sliding box body (73). The threaded holes (78) are aligned with the sliding box body (73). A positioning column (79) is threadedly connected to the threaded hole (78). The positioning column (79) abuts against the outer wall of the sliding box body (73).

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