Piano rib pressing tool

Abstract

The utility model discloses a piano wall bar pressing tool, relates to the field of musical instrument manufacturing, and aims to solve the problem that the production efficiency is too low as a single weight is used for pressing wall bars, only wall bars on a soundboard can be pressed independently at a time, and the key point of the technical scheme is that a plurality of pressing plates are arranged on the top wall of a base in a stacking manner; the top of the pressing plate is covered with a pressure plate, a plurality of threaded rods with the tail ends fixedly connected with the base penetrate through the pressing plate and the pressure plate, the pressure plate is in threaded fit with the threaded rods, the pressing plate is movably connected with the threaded rods, and positioning columns with the same thickness as the threaded rods are positioned and installed on the top wall of the base. And the tail end of the threaded rod is fixedly connected with the positioning column and is rotationally arranged, so that a large number of soundboard bodies and the wall bars are pressed and fixed for a long time, and the effects of stably adhering the wall bars and the soundboard bodies and improving the production efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of musical instrument manufacturing, and particularly relates to a piano rib pressing tool. Background Art

[0002] The rib is one of the essential main components on the soundboard of a piano, also known as a batten. Although it is pasted on the back of the soundboard resonance board, it forms an inseparable main body with the resonance board. One of the functions of the rib is to expand the vibration range of the resonance board. Since the sound wave conduction speed in wood is much faster in the longitudinal direction than in the transverse direction, in order to solve the problem of uneven sound transmission speed during the vibration of the soundboard, enabling the sound wave to spread rapidly throughout the soundboard to the greatest extent with the assistance of the rib is an important component of the soundboard's operation. When pasting the rib, it is required that the texture of the rib is perpendicular to the texture of the resonance board (the ribs and the resonance board are arranged with their texture directions crossing each other). When the resonance board works, the sound wave is transmitted to the rib along the direction of its wood annual rings (wood grain direction), and then spreads to the entire area of the soundboard along the annual ring direction of the rib.

[0003] The existing piano ribs are generally adhered to the soundboard with a special glue, and during the adhesion process, a heavy object is used to firmly press the rib to ensure good adhesion between the rib and the soundboard for firm pasting of the rib.

[0004] The above-mentioned existing technical solution has the following defects: a single heavy object presses the rib, and each time only one rib on a single soundboard can be pressed and bonded separately. When the soundboard is laid flat and bonded with the rib, the floor area occupied is relatively large, which is not conducive to mass production. Therefore, a device for stacking and pressing ribs and firmly bonding them in batches is needed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a piano rib pressing tool.

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

[0007] It includes a base, a plurality of pressing plates are stacked and installed on the top wall of the base, a pressure plate is covered on the top of the pressing plates, a plurality of fitting grooves are formed on the top wall of the pressing plates and the base, guiding convex strips are fixedly arranged around the outer wall of the pressing plates along the fitting grooves, a soundboard groove communicating with the fitting groove is arranged in the middle of the guiding convex strip, a rib is fitted in the fitting groove, a soundboard body is fitted in the soundboard groove, a plurality of threaded rods with the ends fixedly connected to the base penetrate through the pressing plates and the pressure plate, the pressure plate is arranged in threaded cooperation with the threaded rods, the pressing plates are movably connected to the threaded rods, a positioning column with the same thickness as the threaded rod is positioned and installed on the top wall of the base, and the end of the threaded rod is fixedly connected to the positioning column and rotates.

[0008] By adopting the above technical solution, when in use, rotate the threaded rod. When the threaded rod rotates, it will drive the pressure plate to move up and down. When the pressure plate moves up, it will move away from the pressing plate. First, put the glued rib into the fitting groove, then put the soundboard body into the soundboard groove, and then rotate the threaded rod in the reverse direction to make the pressure plate move down to press the pressing plate, so as to tightly press and fix the soundboard body and the rib for a long time, achieving the effect of firmly pasting the rib and the soundboard body. After the rib is installed, release the positioning state of the positioning column. Since the threaded rod and the positioning column have the same thickness, they can be easily pulled out from the base and each pressing plate. The pressure plate with threaded fit is taken away together. At this time, the limit fixation of the pressing plate is completely released, and the pasted soundboard body and rib can be taken out. A large number of soundboard bodies and ribs can be processed batch by batch, comprehensively improving the production efficiency.

[0009] Further, the positioning column is fitted and arranged on the top wall of the base. The base is provided with a pair of long pins penetrating through it, and the long pins penetrate through the positioning column.

[0010] By adopting the above technical solution, the setting of the long pins can tighten the paired positioning columns on the same side with opposite positions at one time. The paired long pins can tighten the positioning columns at the four corners of the base, achieving the effect of fixing the threaded rod in all directions, and facilitating the threaded rod with rotational connection to adjust the position of the pressing plate during rotation to achieve the effect of tightly pressing several groups of soundboard bodies and ribs for a long time.

[0011] Further, a transparent hemispherical hollow sphere is fixedly arranged on the top wall of the pressure plate. The hollow sphere is partially filled with a fixed amount of oil liquid, and several scales are arranged on the outer wall of the hollow sphere.

[0012] By adopting the above technical solution, due to the fact that the threaded rod cannot rotate synchronously during rotation or the tolerance of the workpieces in the pressing plate, the position of the pressure plate will shift and cannot remain horizontal, resulting in uneven stress on the soundboard body and the rib. The oil liquid filled in the hollow sphere will form small bubbles at its top. The scales include horizontal scales and vertical scales. By comparing the position of the bubbles with the scales, the position state of the pressure plate can be effectively grasped, ensuring that the pressure plate can effectively and evenly descend to press the workpieces, making the overall stress of the soundboard body uniform and the rib firmly combined with the soundboard body.

[0013] Further, a rotating handle is fixedly installed on the top wall of the threaded rod, and a pull ring is fixedly installed at one end of the long pin.

[0014] By adopting the above technical solution, the setting of the rotating handle facilitates the operator to exert force to twist the threaded rod, and the setting of the pull ring facilitates the operator to exert force to pull out or insert the long pin, saving effort to control the positioning state of the positioning column.

[0015] Further, a rotatably connected engaging flap is attached to the side wall of the base. The engaging flap is disposed above the long plug pin, and an engaging groove for cooperating with the engaging flap is formed on the outer wall of the long plug pin.

[0016] By adopting the above technical solution, the engaging flap combined with the engaging groove can effectively fix the long plug pin, preventing the long plug pin from accidentally slipping off the base and affecting the normal use of the device.

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

[0018] 1. By adopting a pressure plate, a pressing plate, a fitting groove, a soundboard groove, a threaded rod and a positioning post, the soundboard body and the rib are pressed and fixed for a long time, achieving the effect of firmly pasting the rib and the soundboard body, batch-processing a large number of soundboard bodies and ribs, and comprehensively improving the production efficiency;

[0019] 2. By adopting a long plug pin and a pull ring, the effect of selecting and tightening the positioning post according to actual needs to control the opening of the pressure plate is achieved;

[0020] 3. By adopting a hemispherical hollow ball and a scale, the effect of ensuring that the pressure plate can effectively and evenly descend to press the workpiece, making the overall force of the soundboard body uniform, and the rib and the soundboard body firmly combined is 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 an exploded schematic diagram of the overall structure of the present utility model;

[0024] Figure 3 is Figure 2 a magnified schematic diagram of the structure of part A in

[0025] In the figures, 1, base; 2, pressing plate; 3, pressure plate; 4, rib; 41, fitting groove; 5, soundboard body; 51, guiding rib; 52, soundboard groove; 6, threaded rod; 61, rotating handle; 7, positioning post; 8, long plug pin; 81, pull ring; 9, hollow sphere; 10, engaging flap; 101, engaging groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following further details the present utility model 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 in conjunction with 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 embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model 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 base 1. A number of pressing plates 2 are stacked and installed on the top wall of the base 1. A pressure plate 3 is covered on the top of the pressing plate 2. A number of fitting grooves 41 are formed on the top wall of the pressing plate 2 and the base 1. A guiding rib 51 is fixedly arranged around the outer wall of the pressing plate 2 along the fitting groove 41. A soundboard groove 52 communicating with the fitting groove 41 is arranged in the middle of the guiding rib 51. A rib 4 is fitted in the fitting groove 41, and a soundboard body 5 is fitted in the soundboard groove 52. A number of threaded rods 6 with the ends fixedly connected to the base 1 penetrate through the pressing plate 2 and the pressure plate 3. The pressure plate 3 is arranged in threaded cooperation with the threaded rod 6, and the pressing plate 2 is movably connected to the threaded rod 6. A positioning column 7 with the same thickness as the threaded rod 6 is positioned and installed on the top wall of the base 1. The end of the threaded rod 6 is fixedly connected to the positioning column 7 for rotational setting. When in use, the threaded rod 6 is rotated. When the threaded rod 6 rotates, it will drive the pressure plate 3 to move up and down. When the pressure plate 3 moves up, it will move away from the pressing plate 2. First, the rib 4 coated with glue is placed into the fitting groove 41, then the soundboard body 5 is placed into the soundboard groove 52, and then the threaded rod 6 is rotated in the reverse direction to make the pressure plate 3 move down to press the pressing plate 2, so as to firmly press and fix the soundboard body 5 and the rib 4 for a long time, achieving the effect of firmly pasting the rib 4 and the soundboard body 5. After the rib 4 is installed, the positioning state of the positioning column 7 is released. Since the threaded rod 6 and the positioning column 7 have the same thickness, the two can be easily pulled out from the base 1 and each pressing plate 2, and the pressure plate 3 in threaded cooperation is taken away together. At this time, the limit fixation of the pressing plate 2 is completely released, and the pasted soundboard body 5 and rib 4 can be taken out. A large number of soundboard bodies 5 and ribs 4 can be processed in batches, comprehensively improving the production efficiency.

[0030] The positioning column 7 is fitted in the top wall of the base 1. The base 1 is provided with a pair of long pins 8 penetrating through it. The long pins 8 penetrate through the positioning column 7. The setting of the long pins 8 can tighten the paired positioning columns 7 on the same side with opposite positions at one time. The paired long pins 8 can tighten the positioning columns 7 at the four corners of the base 1, achieving the effect of fixing the threaded rod 6 in all directions, facilitating the threaded rod 6 for rotational connection to adjust the position of the pressing plate 2 during rotation to achieve the effect of firmly pressing a number of groups of the soundboard body 5 and the rib 4 for a long time.

[0031] A transparent hemispherical hollow sphere 9 is fixedly set on the top wall of the pressure plate 3, and the hollow sphere 9 is partially filled with a certain amount of oil. The outer wall of the hollow sphere 9 is provided with several scales. Since the threaded rod 6 cannot rotate synchronously during the rotation process or the tolerance of the workpiece in the pressing plate 2 is affected, the position of the pressure plate 3 will be offset and cannot be kept horizontal, resulting in uneven force on the sound board body 5 and the ribs 4. Small bubbles will be formed on the top of the hollow sphere 9 that is partially filled with oil. The scale includes horizontal and vertical scales. By comparing the position of the bubbles with the scales, the position status of the pressure plate 3 can be effectively grasped to ensure that the pressure plate 3 can be effectively and evenly lowered to press the workpiece, so that the overall force on the sound board body 5 is uniform, and the ribs 4 are firmly combined with the sound board body 5.

[0032] A rotating handle 61 is fixedly installed on the top wall of the threaded rod 6, and a pull ring 81 is fixedly installed on one end of the long pin 8. The setting of the rotating handle 61 makes it easy for the operator to exert force to twist the threaded rod 6, and the setting of the pull ring 81 makes it easy for the operator to exert force to pull out or insert the long pin 8, thereby controlling the positioning state of the positioning column 7 with effort.

[0033] A rotatably connected locking paddle 10 is provided on the side wall of the base 1. The locking paddle 10 is arranged above the long pin 8. A locking groove 101 is provided on the outer wall of the long pin 8 to cooperate with the locking paddle 10. The locking paddle 10 combined with the locking groove 101 can effectively fix the long pin 8 to prevent the long pin 8 from accidentally slipping off the base 1 and affecting the normal use of the device.

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

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pressing tool for a piano rib (4), comprising a base (1), characterized in that: A plurality of pressing plates (2) are stacked and installed on the top wall of the base (1). A pressure plate (3) is covered on the top of the pressing plates (2). A plurality of fitting grooves (41) are formed in the top wall of the pressing plates (2) and the base (1). Guide ribs (51) are fixedly arranged around the fitting grooves (41) on the outer wall of the pressing plates (2). A soundboard groove (52) communicating with the fitting grooves (41) is arranged in the middle of the guide ribs (51). A ribbed wood (4) is fitted in the fitting grooves (41), and a soundboard body (5) is fitted in the soundboard grooves (52). A plurality of threaded rods (6) with the ends fixedly connected to the base (1) are arranged through the pressing plates (2) and the pressure plate (3). The pressure plate (3) is arranged in threaded cooperation with the threaded rods (6), and the pressing plates (2) are movably connected to the threaded rods (6). A positioning column (7) having the same thickness as the threaded rods (6) is positioned and installed on the top wall of the base (1). The end of the threaded rod (6) is fixedly connected to the positioning column (7) and is rotatably arranged.

2. The pressing tool for a piano rib (4) according to claim 1, characterized in that: The positioning column (7) is fitted in the top wall of the base (1). The base (1) is provided with a pair of long pins (8) penetrating through it, and the long pins (8) penetrate through the positioning column (7).

3. A pressing tool for a piano rib (4) according to claim 2, characterized in that: A transparent hemispherical hollow sphere (9) is fixedly arranged on the top wall of the pressure plate (3). The hollow sphere (9) is partially filled with a fixed amount of hydraulic fluid, and a plurality of scales are arranged on the outer wall of the hollow sphere (9).

4. A pressing tool for a piano rib (4) according to claim 3, characterized in that: A rotating handle (61) is fixedly installed on the top wall of the threaded rod (6), and a pull ring (81) is fixedly installed at one end of the long pin (8).

5. A pressing tool for a piano rib (4), according to claim 4, characterized in that: A clamping flap (10) rotatably connected is attached to the side wall of the base (1). The clamping flap (10) is arranged above the long pin (8), and a clamping groove (101) for cooperating with the clamping flap (10) is formed on the outer wall of the long pin (8).

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