Automatic grinding device for musical instrument production and processing

Abstract

The invention relates to the technical field of musical instrument production and polishing, in particular to an automatic polishing device for musical instrument production and processing, and provides the automatic polishing device for musical instrument production and processing for solving the problem that existing equipment cannot polish a guitar case. A grinding belt capable of moving is arranged on the transverse frame, a vertical plate is arranged at the upper end of the bottom plate, a supporting plate capable of moving front and back and up and down is installed on the vertical plate, a clamping device is arranged at the upper end of the supporting plate and comprises two clamping bases used for clamping and fixing a guitar box, and when the supporting plate moves backwards, a structure that the guitar box moves backwards and moves leftwards and rightwards in a reciprocating mode can be formed. When the supporting plate moves downwards, a structure for turning over the clamping base and the guitar box can be formed. And the four end faces of the guitar box can be automatically polished instead of manual operation, manpower resource occupation is reduced, and the polishing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of musical instrument production and polishing, and in particular to an automatic polishing device for musical instrument production and processing. Background Art

[0002] Musical instruments are tools used to make music, producing sounds in different ways. Musical instruments are basic tools for music creation, playing and performance, and each instrument has its own unique timbre and playing method. Musical instruments can be driven by manpower, mechanical force, airflow or electrical energy. Polishing is required in the production of musical instruments to improve the appearance, touch, sound quality and overall production quality of the instrument. Polishing is not only to make the surface of the instrument smooth and beautiful, but also to optimize the performance of the instrument material to ensure the accuracy of each component and the high standards of craftsmanship. Different types of musical instruments (such as string instruments, wind instruments, percussion instruments, etc.) have different polishing processes. The prior art provides a publication number: CN116749039A, named: an automatic polishing device for musical instrument production and processing, although it solves the problem of polishing the inner and outer surfaces of tubular instruments, it cannot be polished for the guitar case; for this reason, an automatic polishing device for musical instrument production and processing is designed to solve the above-mentioned problems. Summary of the invention

[0003] In view of the fact that existing equipment cannot polish guitar cases, the present invention provides an automated polishing device for musical instrument production and processing, which can automatically polish the four end surfaces of the guitar case instead of manual operation, reduce human resource occupation, improve polishing efficiency, and effectively solve the problems mentioned in the above background technology.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: An automated polishing device for musical instrument production and processing comprises a base plate, a horizontal frame which can move up and down is provided at the upper end of the base plate, a movable polishing belt is provided on the horizontal frame, a vertical plate is provided at the upper end of the base plate, a support plate which can move forward and backward and up and down is installed on the vertical plate, a clamping device is provided at the upper end of the support plate, the clamping device comprises two clamping seats for clamping and fixing a musical instrument case, when the support plate moves backward, a structure in which the musical instrument case moves back and forth left and right at the same time can be formed; when the support plate moves downward, a structure in which the clamping seat and the musical instrument case flip over can be formed.

[0005] The upper surface of the bottom plate is fixedly connected with a frame, the cross frame is slidably connected to the inner wall of the frame, the left and right sides of the inner wall at the top of the frame are respectively fixedly connected with first telescopic rods, and the frame is fixedly connected to the telescopic ends of the two first telescopic rods.

[0006] The left and right sides of the front end surface of the frame are respectively fixedly connected with a first motor, the output ends of the first motor are respectively fixedly connected with pulleys, the lower end of the frame is provided with an extrusion wheel, and the grinding belt sleeve is arranged on the outer surfaces of the two pulleys and the extrusion wheel.

[0007] A U-shaped seat is slidably connected to one end surface of the vertical plate, a second motor is fixedly connected to one end surface of the U-shaped seat, a threaded rod rotatably connected to the U-shaped seat is fixedly connected to the output end of the second motor, a bracket is slidably connected to the inner wall of the U-shaped seat, the bracket plate is fixedly connected to the upper end surface of the bracket, and a threaded cylinder threadedly connected to the threaded rod is provided in the middle of the bracket.

[0008] The upper end surface of the support plate is slidably connected with an L-shaped seat, the right end surface of the L-shaped seat is fixedly connected with a horizontal plate, the clamping seats are respectively installed on the front and rear sides of the horizontal plate, the lower end of the support plate is rotatably connected with the first spur gear, the right end surface of the vertical plate is fixedly connected with the first spur rack meshing with the first spur gear, the upper end of the first spur gear is coaxially fixed with a first disk, the upper end surface of the first disk is fixedly connected with a second sliding pin at a non-center portion, and the left end surface of the L-shaped seat is fixedly connected with a long key plate matching with the second sliding pin.

[0009] A cylinder is fixedly connected to the left end surface of the bracket, a first sliding pin is slidably connected to the inner wall of the cylinder, a first spring matching with the first sliding pin is fixedly connected to the inner wall of the bottom end of the cylinder, a quadrilateral groove matching with the first sliding pin is opened on the right end surface of the vertical plate, the quadrilateral groove includes an upper transverse groove, a first inclined groove, a lower transverse groove and a second inclined groove, and the first guide seat and the second guide seat matching with the first sliding pin are respectively fixedly connected to the inner walls of the bottom ends of the first inclined groove and the second inclined groove.

[0010] The inner walls at the front and rear ends of the cross plate are respectively slidably connected with movable clamping plates, and the clamping seats are rotatably connected to the corresponding clamping plates. The outer ends of the two clamping seats are respectively coaxially fixed with second spur gears, and the outer end surfaces of the two clamping plates are respectively slidably connected with second spur racks meshing with the second spur gears. An L-shaped plate that can move left and right is provided at the lower end of the L-shaped seat, and a connecting plate is fixedly connected to the upper end surface of the L-shaped plate, and the second spur racks are respectively slidably connected to the front and rear sides of the right end surface of the connecting plate.

[0011] The inner wall at the lower end of the L-shaped seat is slidably connected to a wedge-shaped block, and the inner wall at the lower end of the L-shaped seat is also provided with a second spring that cooperates with the wedge-shaped block. The upper surface of the L-shaped plate is provided with a plurality of triangular grooves that cooperate with the wedge-shaped block. The left side of the upper surface of the L-shaped plate is fixedly connected to a first support pad, and the L-shaped seat is fixedly connected to a long spring that cooperates with the first support pad.

[0012] The inner wall at the lower end of the L-shaped plate is slidably connected with multiple live pins, and the inner wall at the lower end of the L-shaped plate is also provided with multiple third springs that cooperate with the live pins. The lower end of the L-shaped seat is provided with a push plate that can move forward and backward, and the front and rear sides of the upper surface of the push plate are respectively fixed with wedge-shaped plates, one end of the wedge-shaped plate is respectively provided with a long inclined surface that cooperates with the live pin, and the other end of the wedge-shaped plate is respectively provided with a chamfered surface that cooperates with the live pin, and a notch is also provided in the middle of the two wedge-shaped plates.

[0013] The front and rear sides of the right end surface of the push plate are respectively fixed with a second support pad, the lower sides of the front and rear end surfaces of the L-shaped seat are respectively fixed with a central spring that matches the second support pad, and the front and rear sides of the upper end surface of the bottom plate are also respectively fixed with a baffle that matches the push plate.

[0014] Compared with the prior art, the present invention has the following advantages: When in use, a movable polishing belt is provided. After the piano case contacts the polishing belt, the piano case can be polished when the polishing belt moves. When the piano case moves forward or backward to the top position and flips over, multiple end faces of the piano case can be polished in coordination with the up and down movement of the polishing belt. The provided clamp seat can fix the piano case, and even if the piano case is fixed to the upper end of the support plate, it follows the forward and backward and up and down movement of the support plate. When the support plate moves forward and backward, it can drive the piano case to move forward and backward, and when the piano case moves forward and backward, it can also move left and right. It moves back and forth, and the polishing belt can perform a large-area scanning polishing on the upper end surface of the piano case; when the pallet moves forward or backward to the top position, it can move up and down again. When the pallet moves up and down, it can drive the clamp and the piano case to flip to a specified angle. Even if the piano case is flipped, the other end surface can be polished again. Through multiple cycles, the upper, lower, left and right end surfaces of the piano case are fully polished. The four end surfaces of the piano case can be automatically polished instead of manual operation throughout the process, reducing labor costs and improving polishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a first axonometric view of an automated polishing device for musical instrument production and processing according to the present invention.

[0016] Figure 2 This is a second axonometric view of an automated polishing device for musical instrument production and processing according to the present invention.

[0017] Figure 3 The present invention is a schematic diagram of the installation of a horizontal frame of an automated polishing device for musical instrument production and processing.

[0018] Figure 4 This is a schematic diagram of the installation of a horizontal plate of an automated polishing device for musical instrument production and processing according to the present invention.

[0019] Figure 5 This is a schematic diagram of the installation of the first spur rack of an automated polishing device for musical instrument production and processing according to the present invention.

[0020] Figure 6 This is a schematic diagram of the installation of a support plate of an automated polishing device for musical instrument production and processing according to the present invention.

[0021] Figure 7 The present invention is a schematic diagram of the cylinder installation of an automated polishing device for musical instrument production and processing.

[0022] Figure 8 The present invention is a cylindrical cross-sectional view of an automatic polishing device for musical instrument production and processing.

[0023] Fig. 9 This is a schematic diagram of the installation of the first sliding pin of an automated polishing device for musical instrument production and processing according to the present invention.

[0024] Fig.10 This is a schematic diagram of the installation of the first guide seat of an automated polishing device for musical instrument production and processing according to the present invention.

[0025] Fig.11 This is a schematic diagram of the installation of a baffle of an automated polishing device for musical instrument production and processing according to the present invention.

[0026] Fig.12 The present invention is a schematic diagram of the installation of a clamping plate of an automated polishing device for musical instrument production and processing.

[0027] Fig.13 This is a schematic diagram of the installation of an L-shaped plate of an automated polishing device for musical instrument production and processing according to the present invention.

[0028] Fig.14 The invention discloses an L-shaped plate cross-sectional view of an automatic polishing device for musical instrument production and processing.

[0029] Fig.15 The present invention is a schematic diagram of the installation of a movable pin of an automated polishing device for musical instrument production and processing.

[0030] Fig.16 The present invention is a schematic diagram of the installation of a wedge plate of an automated polishing device for musical instrument production and processing.

[0031] Numbers in the figure: 1-bottom plate, 2-support leg, 3-frame, 4-horizontal frame, 5-first telescopic rod, 6-T-shaped plate, 7-pulley, 8-music box, 9-extrusion wheel, 10-grinding belt, 11-first motor, 12-vertical plate, 13-second motor, 14-threaded rod, 15-threaded cylinder, 16-support seat, 17-U-shaped seat, 18-support plate, 19-first straight gear, 20-first straight rack, 21-first sliding pin, 22-cylinder, 23-first spring, 24-upper horizontal groove, 25-first inclined groove, 26-lower horizontal groove, 27-second inclined groove, 28-first guide seat, 29-second guide seat, 30-inclined surface , 31-straight surface, 32-L-shaped seat, 33-first disc, 34-second sliding pin, 35-long key plate, 36-cross plate, 37-clamp plate, 38-clamp seat, 39-second telescopic rod, 40-second spur gear, 41-second spur rack, 42-connecting plate, 43-L-shaped plate, 44-first support pad, 45-long spring, 46-handle, 47-second spring, 48-wedge block, 49-triangular slot, 51-center spring, 52-second support pad, 53-push plate, 54-wedge plate, 55-long inclined surface, 56-beveled surface, 57-notch, 58-third spring, 59-live pin, 60-baffle. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0033] like Figure 1-Figure 16 As shown, the present invention provides an automated polishing device for musical instrument production and processing, including a base plate 1, a horizontal frame 4 that can move up and down is provided on the upper end of the base plate 1, a movable polishing belt 10 is provided on the horizontal frame 4, a vertical plate 12 is provided on the upper end of the base plate 1, a support plate 18 that can move forward and backward and up and down is installed on the vertical plate 12, a clamping device is provided on the upper end of the support plate 18, the clamping device includes two clamping seats 38 for clamping and fixing a musical instrument case 8, when the support plate 18 moves backward, it can form a structure in which the musical instrument case 8 moves backward and back and forth left and right; when the support plate 18 moves downward, it can form a structure in which the clamping seat 38 and the musical instrument case 8 flip over.

[0034] like Figure 1-Figure 9As shown, a plurality of supporting legs 2 are fixedly connected to the lower end surface of the bottom plate 1, and the bottom plate 1 and the supporting legs 2 are used to support the entire device; by providing a movable polishing belt 10, after the piano case 8 contacts the polishing belt 10, the piano case 8 can be polished when the polishing belt 10 moves, and by providing a horizontal frame 4 that can move up and down, that is, it can limit the support and support the polishing belt 10 to move up and down, when the piano case 8 is turned over, by cooperating with the up and down movement of the polishing belt 10, multiple end surfaces of the piano case 8 can be polished; by providing a clamping device, that is, two clamping seats 38, the piano case 8 can be fixed, even if the piano case 8 is fixed to the upper end of the support plate 18 and follows the support plate 18 to move forward and backward and up and down, by providing a horizontal frame 4 that can move forward and backward and up and down The downward moving support plate 18 can drive the piano case 8 to move forward and backward when the support plate 18 moves forward and backward, and can also move back and forth left and right when the piano case 8 moves forward and backward. At this time, the polishing belt 10 can perform a large-area scanning polishing on the upper end surface of the piano case 8; when the support plate 18 moves forward or backward to the top position, it can move up and down again. When the support plate 18 moves up and down, it can drive the clamping seat 38 and the piano case 8 to flip to a specified angle. Even if the piano case 8 is flipped 90 degrees, the other end surface of the piano case 8 can be polished again with the other end surface. Through multiple cycles, the upper, lower, left and right end surfaces of the piano case 8 are fully polished, and the four end surfaces of the piano case 8 can be automatically polished instead of manual operation throughout the process, thereby reducing labor costs and improving polishing efficiency.

[0035] The upper surface of the bottom plate 1 is fixed with a frame 3, a cross frame 4 is slidably connected to the inner wall of the frame 3, first telescopic rods 5 are fixed to the left and right sides of the inner wall at the top of the frame 3, and the frame 3 is fixed to the telescopic ends of the two first telescopic rods 5.

[0036] like Figure 1 As shown, the frame 3 is used to support and limit the first telescopic rod 5, the cross frame 4 and other components. The cross frame 4 can be slidably connected to the inner wall of the frame 3 up and down. The first telescopic rod 5 can drive the cross frame 4 to move up and down when telescoping, thereby moving the cross frame 4 up and down to adjust the height of the grinding belt 10. The telescopic rod is a prior art and will not be described in detail.

[0037] The left and right sides of the front end surface of the frame 3 are respectively fixedly connected with a first motor 11, and the output ends of the first motor 11 are respectively fixedly connected with pulleys 7. The lower end of the frame 3 is provided with an extrusion wheel 9, and the grinding belt 10 is sleeved on the outer surfaces of the two pulleys 7 and the extrusion wheel 9.

[0038] like Figure 1-Figure 3As shown, the function of the first motor 11 is to provide rotational force for the pulley 7, the extrusion wheel 9 is rotatably connected to the lower end of the cross frame 4, and a detachable T-shaped plate 6 is provided at the rear end of the cross frame 4. After the T-shaped plate 6 is disassembled, it is convenient to regularly replace the grinding belt 10; the extrusion wheel 9 and the pulley 7 are rotatably connected to the cross frame 4 through a rotating shaft, the extrusion wheel 9 has a certain elastic deformation, and the outer surface of the extrusion wheel 9 is made of rubber. When the piano case 8 is squeezed downward to grind, the extrusion wheel 9 can be deformed so that the grinding belt 10 can contact the end face of the piano case 8 more, and under the deformation of the extrusion wheel 9, when the left and right end sides of the piano case 8 are grinded, the grinding belt 10 can be better fitted to the side end face of the piano case 8, so that the grinding is more sufficient. When the first motor 11 is started, it can drive the pulley 7 to rotate. When the pulley 7 rotates, it can drive the grinding belt 10 to move and the extrusion wheel 9 to rotate through the friction connection with the grinding belt 10, so that the grinding belt 10 moves to grind the piano case 8.

[0039] A U-shaped seat 17 is slidably connected to one end surface of the vertical plate 12, a second motor 13 is fixedly connected to one end surface of the U-shaped seat 17, a threaded rod 14 rotatably connected to the U-shaped seat 17 is fixedly connected to the output end of the second motor 13, a bracket 16 is slidably connected to the inner wall of the U-shaped seat 17, a bracket 18 is fixedly connected to the upper end surface of the bracket 16, and a threaded cylinder 15 threadedly connected to the threaded rod 14 is provided in the middle of the bracket 16.

[0040] like Figure 4-Figure 6 As shown, the vertical plate 12 is used to support and install the U-shaped seat 17, the clamping device and other parts. The U-shaped seat 17 can be slidably connected to the vertical plate 12 up and down, and the bracket 16 can be slidably connected to the inner wall of the U-shaped seat 17 front and back. The function of the second motor 13 is to provide a rotational force for the threaded rod 14. A bearing seat is rotatably connected to the outer surface of the threaded rod 14. The bottom end of the bearing seat is fixedly connected to the end surface of one side of the U-shaped seat 17. The threaded rod 14 can only be rotated; when the threaded rod 14 rotates, the threaded barrel 15 can be driven to move forward or backward; the bracket can be limited by the U-shaped seat 17 16, the support plate 18 can move up and down, and can be connected to the inner wall of the U-shaped seat 17 by sliding forward and backward through the support seat 16, which can limit the support plate 18 to move up and down. When the first motor 11 is started, it can drive the threaded rod 14 to rotate. When the threaded rod 14 rotates, it can drive the threaded barrel 15, the support seat 16, the support plate 18, etc. to move forward or backward. The threaded rod 14 and the threaded barrel 15 are threadedly connected and have a self-locking function. When the threaded rod 14 does not rotate, the corresponding positions of the threaded barrel 15, the support seat 16, the support plate 18, etc. are fixed and will not move.

[0041] The upper end surface of the support plate 18 is slidably connected with an L-shaped seat 32, and the right end surface of the L-shaped seat 32 is fixedly connected with a horizontal plate 36. The clamping seat 38 is respectively installed on the front and rear sides of the horizontal plate 36. The lower end of the support plate 18 is rotatably connected with the first spur gear 19, and the right end surface of the vertical plate 12 is fixedly connected with a first spur rack 20 meshing with the first spur gear 19. The upper end of the first spur gear 19 is coaxially fixed with a first disk 33, and the upper end surface of the first disk 33 is fixedly connected with a second sliding pin 34 at a non-center portion of the upper end surface. The left end surface of the L-shaped seat 32 is fixedly connected with a long key plate 35 matching with the second sliding pin 34.

[0042] like Figure 4-Figure 6 , Fig.12 As shown, the L-shaped seat 32 can be slidably connected to the upper end surface of the support plate 18, the cross plate 36 can support the installation clamp seat 38, and when the support plate 18 moves forward and backward or up and down, it can drive the L-shaped seat 32, the cross plate 36, and the clamp seat 38 to move up and down or forward and backward, and the L-shaped seat 32, the cross plate 36, and the clamp seat 38 can move left and right on the upper end of the support plate 18; the inner wall of the first spur gear 19 and the first disc 33 at the center is fixedly connected with a rotating shaft, and the rotating shaft is rotatably connected to the inner wall of the support plate 18. Through the support of the first spur gear 19 and the first disc 33 by the rotating shaft, the first spur gear 19 and the first disc 33 can be limited to move forward and backward or up and down with the support plate 18, and can also rotate on the support plate 18; the installation and shape of the second sliding pin 34, the L-shaped seat 32, and the first disc 33 are as shown in FIG. Fig.12 As shown, when the first disc 33 rotates, the second sliding pin 34 can be driven to move in a circular motion. When the second sliding pin 34 moves in a circular motion, it can drive the long key plate 35 to move back and forth left and right through the meshing with the long key plate 35, that is, the L-shaped seat 32, the cross plate 36, the clamp seat 38, etc. move back and forth left and right; when the support plate 18 moves forward and backward, it can drive the L-shaped seat 32, the first spur gear 19, the first disc 33, the clamp seat 38, etc. to move forward and backward. When the first spur gear 19 moves forward and backward, it can drive the first spur gear 19 to rotate through the meshing with the first spur rack 20. When the first spur gear 19 rotates, it can drive the first disc 33 to rotate and the second sliding pin 34 to move in a circular motion. The second sliding pin 34, in meshing with the long key plate 35, will drive the long key plate 35, the L-shaped seat 32, the cross plate 36, the clamp seat 38, etc. to move back and forth left and right, that is, the piano case 8 can be polished while moving back and forth and back and forth left and right.

[0043] A cylinder 22 is fixedly connected to the left end surface of the bracket 16, and a first sliding pin 21 is slidably connected to the inner wall of the cylinder 22. A first spring 23 matching with the first sliding pin 21 is fixedly connected to the inner wall of the bottom end of the cylinder 22. A quadrilateral groove matching with the first sliding pin 21 is opened on the right end surface of the vertical plate 12. The quadrilateral groove includes an upper transverse groove 24, a first inclined groove 25, a lower transverse groove 26 and a second inclined groove 27. The inner walls of the bottom ends of the first inclined groove 25 and the second inclined groove 27 are respectively fixedly connected with a first guide seat 28 and a second guide seat 29 matching with the first sliding pin 21.

[0044] like Figure 7-Figure 10 As shown, the cylinder 22 is used to support the first sliding pin 21. The first sliding pin 21 can be slidably connected to the inner wall of the cylinder 22 to the left and right. The first sliding pin 21 is fixedly connected with an anti-slip pad that matches the cylinder 22. The anti-slip pad can prevent the first sliding pin 21 from being separated from the cylinder 22. The first spring 23 is provided. The first spring 23 can always have a leftward driving force on the first sliding pin 21, so that the first sliding pin 21 can be stably engaged with the quadrilateral groove under normal conditions; when the first sliding pin 21 is engaged with the upper transverse groove 24, when the bracket 16 moves backward, the bracket 16 can be in the uppermost position and move backward horizontally. Under the meshing of the first inclined groove 25, when the bracket 16 continues to move backward, the bracket 16 can move backward and downward at the same time. Under the meshing of the first sliding pin 21 and the lower transverse groove 26, when the bracket 16 moves forward, the bracket 16 can be at the lowest position and move forward horizontally. Under the meshing of the first sliding pin 21 and the second inclined groove 27, when the bracket 16 continues to move forward, the bracket 16 can move forward and upward at the same time. That is, under the meshing of the first sliding pin 21 and the quadrilateral groove, the bracket 16 and the support plate 18 can be limited to move along the trajectory line of the quadrilateral groove. The installation and shape of the first sliding pin 21, the first guide seat 28, and the second guide seat 29 are as shown in FIG. Fig. 9 or Fig.10As shown, the first guide seat 28 and the second guide seat 29 are respectively provided with an inclined surface 30 and a straight surface 31. The inclined surface 30 and the straight surface 31 are provided to enable the first sliding pin 21 to move along a specified trajectory line, that is, when the first sliding pin 21 moves downward on the inner wall of the first inclined groove 25, the first sliding pin 21 can only slide from the inner wall of the first inclined groove 25 to the inner wall of the lower transverse groove 26, and cannot slide from the inner wall of the lower transverse groove 26 to the inner wall of the first inclined groove 25, that is, when the first sliding pin 21 slides upward on the inner wall of the second inclined groove 27, the first sliding pin 21 can only slide from the inner wall of the second inclined groove 27 to the inner wall of the upper transverse groove 24, and cannot slide from the inner wall of the upper transverse groove 24 to the inner wall of the first inclined groove 25. When the first sliding pin 21 moves backward on the inner wall of the first inclined groove 25, the first sliding pin 21 will meet the inclined surface 30 of the first guide seat 28. Under the meshing of the inclined surface 30 and the first sliding pin 21, the first sliding pin 21 can compress the first spring 23 and make a part of the first sliding pin 21 enter the inner wall of the cylinder 22. When the first sliding pin 21 moves downward to the bottom end, that is, the first sliding pin 21 enters the inner wall of the lower transverse groove 26, it will be out of contact with the first guide seat 28, and the first sliding pin 21 will pop out under the elastic force of the first spring 23, that is, the first sliding pin 21 moves to the left and contacts the bottom end surface of the lower transverse groove 26. When the first sliding pin 21 moves forward on the inner wall of the lower transverse groove 26, the straight surface 31 of the first guide seat 28 will block the first sliding pin 21 from moving upward, even if the first sliding pin 21 can only move forward along the inner wall of the lower transverse groove 26, that is, through the cooperation of the first sliding pin 21 and the first guide seat 28, it can prevent the first sliding pin 21 from mistakenly entering the inner wall of the first inclined groove 25 when moving on the inner wall of the lower transverse groove 26; similarly, when the first sliding pin 21 moves forward on the inner wall of the second inclined groove 27, the first sliding pin 21 will meet the inclined surface 30 of the second guide seat 29, so that the first sliding pin 21 can compress the first spring 23, and when the first sliding pin 21 moves upward When the top end enters the inner wall of the upper transverse groove 24, it will be out of contact with the second guide seat 29, and the first sliding pin 21 will pop out under the elastic force of the first spring 23, that is, the first sliding pin 21 moves to the left and contacts the bottom end surface of the upper transverse groove 24. When the first sliding pin 21 moves backward on the inner wall of the upper transverse groove 24, the straight surface 31 of the second guide seat 29 will block the first sliding pin 21 from moving downward, even if the first sliding pin 21 can only move backward along the inner wall of the upper transverse groove 24, that is, the cooperation of the first sliding pin 21 and the second guide seat 29 can prevent the first sliding pin 21 from mistakenly entering the inner wall of the second inclined groove 27 when moving on the inner wall of the upper transverse groove 24.By cooperating with the first sliding pin 21 and the quadrilateral groove, the first sliding pin 21, the bracket 16, the support plate 18, the L-shaped seat 32, the clamp seat 38, the piano case 8, etc. can be synchronously moved forward and backward or up and down, that is, when the support plate 18, the first spur gear 19, the piano case 8, etc. move backward, the piano case 8 can move backward at the uppermost position, and the piano case 8 can move back and forth left and right under the meshing of the first spur gear 19 and the first spur rack 20. When the support plate 18, the first spur gear 19, the piano case 8, etc. move backward to the specified position, the first spur gear 19 will be out of contact with the first spur rack 20, and the first sliding pin 21 will enter the first The inner wall of the inclined groove 25, the corresponding bracket 16, the support plate 18, the first spur gear 19, the piano case 8, etc. will move backward and downward at the same time. When the first spur gear 19 moves downward, it can move to the lower end position of the first spur rack 20, that is, the first spur gear 19 and the first spur rack 20 are misaligned up and down. When the piano case 8 moves downward, it can flip 90 degrees so that the side end surface of the piano case 8 faces upward. Since the side end surface of the piano case 8 is narrow, it is no longer necessary to reciprocate left and right during polishing. When the support plate 18, the bracket 16, the first spur gear 19, the piano case 8, etc. move downward to the top, that is, the first sliding pin 21 is engaged with the lower transverse groove 26. At this time, the bracket 16, the bracket 18, the first sliding pin 21 and the like move forward, which can make the bracket 16, the supporting plate 18, the first straight gear 19, the piano case 8 and the like move forward at the lowest position. At this time, the first straight gear 19 and the first straight rack 20 are misaligned up and down and no longer mesh with each other, that is, the first straight gear 19 no longer rotates and the corresponding piano case 8 no longer moves back and forth left and right. At this time, the piano case 8 can move forward horizontally at the lowest position, that is, the side end surface of the piano case 8 is polished. When the piano case 8 moves forward to the specified position, that is, the first sliding pin 21 meshes with the second inclined groove 27, the supporting plate 18, the piano case 8, the first straight gear 19 and the like can move upward. When the first sliding pin 21 After entering the inner wall of the upper transverse groove 24, the corresponding support plate 18, the piano case 8, the first spur gear 19, etc. will move upward to the top position, that is, the first spur gear 19 and the first spur rack 20 are in the same horizontal plane and collinear position, and the piano case 8 can continue to flip 90 degrees when moving upward to grind the lower end surface of the piano case 8. When the support plate 18, the piano case 8, the first spur gear 19, etc. move backward, the first spur gear 19 will meet the first spur rack 20. At this time, the piano case 8 can move backward and back and forth left and right to grind the lower end surface of the piano case 8. This cycle can be repeated in sequence to fully grind the upper, lower, left and right end surfaces of the piano case 8.After the first spur gear 19 is disengaged from the first spur rack 20, the piano case 8 can be in the middle position, even if the side end surface of the piano case 8 after flipping is aligned with the polishing belt 10, that is, when the piano case 8 moves forward after flipping 90 degrees, the side end surface of the piano case 8 can be in contact with the polishing belt 10, and under the friction between the support plate 18 and the bracket 16, the first spur gear 19 and the first disc 33 and the bracket 16, the polishing belt 10 can be in a stable state when polishing the side end surface of the piano case 8, that is, the piano case 8 will not move left and right. ;

[0045] The inner walls at the front and rear ends of the cross plate 36 are slidably connected with movable clamping plates 37, and the clamping seats 38 are rotatably connected to the corresponding clamping plates 37. The outer ends of the two clamping seats 38 are coaxially fixed with second spur gears 40, and the outer end surfaces of the two clamping plates 37 are slidably connected with second spur racks 41 that mesh with the second spur gears 40. The lower end of the L-shaped seat 32 is provided with an L-shaped plate 43 that can move left and right, and the upper end surface of the L-shaped plate 43 is fixed with a connecting plate 42, and the second spur racks 41 are slidably connected to the front and rear sides of the right end surface of the connecting plate 42.

[0046] like Figure 11-Figure 14 As shown, the clamping plate 37 can be slidably connected to the inner walls at both ends of the cross plate 36, and the second telescopic rods 39 are respectively fixedly connected to the front and rear sides of the left end surface of the cross plate 36. The clamping plate 37 is fixedly connected to the telescopic end of the second telescopic rod 39. The second telescopic rod 39 can drive the two clamping plates 37 and the clamping seat 38 to move synchronously inward or outward, so that the clamping seat 38 clamps and fixes the piano case 8; the second spur gear 40 and the inner wall of the clamping seat 38 are fixedly connected with a rotating shaft, and the rotating shaft is rotatably connected to the clamping plate 37. The second spur rack 41 is slidably connected to the clamping plate 37 left and right, and the lower end of the second spur rack 41 can be slidably connected to the connecting plate 42 back and forth, that is, the second spur rack 41 can follow the clamping plate 37 to move left and right. And when the L-shaped plate 43 and the connecting plate 42 move left and right, they can also drive the second spur rack 41 to move left and right, and the two do not affect each other; when the second spur rack 41 moves forward or backward, it can drive the second spur gear 40 and the clamp seat 38 to rotate, and the clamp seat 38 can drive the piano case 8 to flip over when rotating, so that the piano case 8 can flip over a specified angle after moving forward or backward to a specified position; the L-shaped plate 43 can be slidably connected to the inner wall of the L-shaped seat 32 left and right. When the L-shaped plate 43 moves forward, it can drive the connecting plate 42 and the second spur rack 41 to move forward synchronously. When the second spur rack 41 moves forward, it can drive the second spur gear 40 and the clamp seat 38 to rotate, thereby driving the piano case 8 to flip over.

[0047] The inner wall at the lower end of the L-shaped seat 32 is slidably connected to a wedge-shaped block 48, and the inner wall at the lower end of the L-shaped seat 32 is also provided with a second spring 47 that cooperates with the wedge-shaped block 48. The upper end surface of the L-shaped plate 43 is provided with a plurality of triangular slots 49 that cooperate with the wedge-shaped block 48. The left side of the upper end surface of the L-shaped plate 43 is fixedly connected to a first support pad 44, and a long spring 45 that cooperates with the first support pad 44 is fixedly connected to the L-shaped seat 32.

[0048] like Fig.14 As shown, the wedge block 48 can slide up and down on the inner wall of the L-shaped seat 32, and the second spring 47 always has a downward driving force on the wedge block 48, so that the wedge block 48 is at the lowest position under normal conditions. Through the cooperation of the triangular slot 49 and the wedge block 48, the L-shaped plate 43 can slide to the right in one direction. The left ends of the wedge block 48 and the triangular slot 49 are respectively inclined end faces, and the right ends are respectively right-angled faces. When the L-shaped plate 43 moves from left to right, the inclined surface 30 of the triangular slot 49 cooperates with the inclined surface 30 of the wedge block 48, so that the wedge block 48 can move upward and compress the second spring 47. When the L-shaped plate 43 moves from right to left, the right-angled surface of the triangular slot 49 will contact with the right-angled surface of the triangular slot 49. The right-angled surfaces of the wedge block 48 are in contact, and at this time the wedge block 48 can block the L-shaped plate 43 from moving leftward. Therefore, through the cooperation of the set triangular groove 49 and the wedge block 48, the L-shaped plate 43 can be limited to move only to the right in one direction; the long spring 45 always has a leftward elastic force on the first support pad 44 and the L-shaped plate 43, even if the L-shaped plate 43 has a leftward driving force under normal conditions, that is, the wedge block 48 and the triangular groove 49 can be stably engaged, and at this time the position of the L-shaped plate 43 can be fixed, that is, the position of the second spur rack 41 can be fixed, so that the second spur rack 41, the second spur gear 40, the clamp seat 38, etc. are in a stable state under normal conditions, that is, the piano case 8 is in a stable state.

[0049] The inner wall at the lower end of the L-shaped plate 43 is slidably connected with a plurality of movable pins 59, and the inner wall at the lower end of the L-shaped plate 43 is also provided with a plurality of third springs 58 cooperating with the movable pins 59. The lower end of the L-shaped seat 32 is provided with a push plate 53 capable of moving forward and backward, and the front and rear sides of the upper end surface of the push plate 53 are respectively fixedly connected with wedge-shaped plates 54, and one end of the wedge-shaped plate 54 is respectively provided with a long inclined surface 55 cooperating with the movable pin 59, and the other end of the wedge-shaped plate 54 is respectively provided with a beveled surface 56 cooperating with the movable pin 59, and a notch 57 is also provided in the middle of the two wedge-shaped plates 54.

[0050] like Figure 14-16As shown, the push plate 53 can be slidably connected to the lower end of the L-shaped seat 32, that is, the push plate 53 can move forward and backward at the lower end of the L-shaped seat 32; a plurality of mounting grooves are respectively provided on the L-shaped plate 43, and the movable pin 59 and the third spring 58 are respectively installed in the corresponding mounting grooves. The movable pin 59 can be slidably connected to the L-shaped plate 43 up and down, and the third spring 58 always has a downward driving force on the movable pin 59, so that the movable pin 59 is in the lowest position under normal conditions. When the push plate 53 moves forward and backward, it can drive the wedge plate 54 to move forward and backward. The installation and shape of the wedge plate 54, the movable pin 59, the notch 57, the long inclined surface 55, and the beveled surface 56 are as shown in FIG. Fig.16As shown, when the wedge plate 54 moves forward or backward, the long inclined surface 55 of the wedge plate 54 can meet with a corresponding live pin 59. After the long inclined surface 55 meets and meshes with the live pin 59, the wedge plate 54 continues to move and can drive multiple live pins 59, the L-shaped plate 43, etc. to move to the right synchronously. When the L-shaped plate 43 moves to the right to the specified position, even if the corresponding triangular groove 49 meets and meshes with the wedge block 48, the L-shaped plate 43 is fixed again at this time, and the corresponding second spur rack 41 meshes with the second spur gear 40 and rotates 90 degrees, that is, the clamping pad and the piano case 8 rotate 90 degrees, so that the side end surface of the piano case 8 faces upward; through the cooperation of the set beveled surface 56 and the live pin 59, the live pin 59 can be moved unidirectionally from left to right When the wedge-shaped plate 54 moves forward or backward, the long inclined surface 55 meets the live pin 59 at the rightmost end, so that the live pin 59 and the L-shaped plate 43 can move from left to right. When the live pin 59 in the middle moves to the right, it can meet the chamfered surface 56 of the wedge-shaped plate 54. When the live pin 59 in the middle engages with the chamfered surface 56, the live pin 59 can move upward, that is, the live pin 59 enters the inner wall of the installation groove and compresses the third spring 58. When the L-shaped plate 43 moves to the right to make the triangular groove 49 in the middle engage with the wedge block 48, the position of the L-shaped plate 43, that is, the left and right coordinate position of the limit live pin 59, can be limited and fixed at this time. At this time, the wedge-shaped plate 54 is reset. When the wedge plate 54 is moved forward or backward, the long inclined surface 55 can be in contact with the live pin 59 in the middle, and the live pin 59 in the middle can be disengaged from the wedge plate 54. When the wedge plate 54 is moved forward or backward, the long inclined surface 55 can be in contact with the live pin 59 in the middle, and the live pin 59 in the middle can be driven to move to the specified position synchronously. Therefore, by cooperating with the set live pin 59 and the wedge plate 54, the wedge plate 54 can be driven to move forward or backward once, and the live pin 59 and the L-shaped plate 43 can be driven to move to the right synchronously. When the plate 43 moves forward a specified distance, even if the second spur rack 41 meshes with the second spur gear 40 and rotates 90 degrees once, that is, the second spur rack 41 meshes with the second spur gear 40 and rotates 90 degrees in the same direction in sequence, the upper end face, the side end face or the lower end face of the piano case 8 can always face upward during polishing; the notch 57 groove is set to facilitate the movable pin 59 to move to the left and reset, that is, when the clamp seat 38, the second spur rack 41, etc. need to be reset, by driving the wedge block 48 to move upward, the wedge block 48 is disengaged from the triangular slot 49, and at this time the L-shaped plate 43, the movable pin 59, etc. will move to the left and reset under the elastic force of the long spring 45, that is, the movable pin 59 moves to the left and resets through the position of the notch 57 groove; Fig.13 As shown, handles 46 are fixedly connected to the front and rear end surfaces of the wedge-shaped block 48 respectively. The function of the handles 46 is to facilitate driving the wedge-shaped block 48 to move upward, that is, to facilitate driving the L-shaped plate 43 to move leftward and reset.

[0051] The second support pad 52 is fixedly connected to the front and rear sides of the right end surface of the push plate 53, and the lower sides of the front and rear end surfaces of the L-shaped seat 32 are fixedly connected to the center spring 51 that matches the second support pad 52. The front and rear sides of the upper end surface of the bottom plate 1 are also fixedly connected to the baffle 60 that matches the push plate 53.

[0052] like Fig.11 or Fig.14As shown, the baffle 60 is provided to prevent the push plate 53 from moving forward or backward at a specified position; the outer ends of the two center springs 51 are respectively fixed to the second support pads 52, and the center spring 51 can exert an outward thrust on the two second support pads 52, so that the second support pads 52, the push plate 53, and the wedge plate 54 are in the middle position under normal conditions, and when the push plate 53 moves forward or backward, it can compress or stretch the center spring 51, and when the push plate 53 is no longer subjected to force, it can be reset to the middle position under the elastic force of the center spring 51; therefore, when the support plate 18, the push plate 53, etc. move forward or backward to the end point, the push plate 53 can meet the baffle 60 and prevent the push plate 53 from continuing to move, and at this time the support plate 1 8. When the L-shaped seat 32 continues to move forward or backward, the push plate 53 will no longer move forward or backward due to the obstruction of the baffle plate 60. At this time, the push plate 53 will slide backward or forward relative to the L-shaped seat 32, that is, at this time, the push plate 53 and the wedge plate 54 can drive the movable pin 59 and the L-shaped plate 43 to move to the right, that is, drive the corresponding piano case 8 to flip 90 degrees to change the polishing surface. Since the baffle plate 60 is set higher than the highest point position of the push plate 53, the push plate 53 will not affect the baffle plate 60 to block the push plate 53 when it moves up and down with the support plate 18; therefore, by setting the first sliding pin 21 and the quadrilateral groove, the movable pin 59 and the wedge plate 54 and other components to cooperate with each other, when the upper end surface of the piano case 8 is polished, the piano case 8 can be first positioned at the upper end position. It moves horizontally backward and back and forth left and right at the same time, and at this time, the upper end surface of the music box 8 can be scanned and fully polished. When the music box 8 moves to the rearmost position, the music box 8 is out of contact with the polishing belt 10, and the music box 8, the first spur gear 19, etc. will move backward, downward, and flip over. When the first spur gear 19 moves downward, it can be misaligned with the first spur rack 20 up and down, that is, it is no longer meshed with the first spur rack 20. At this time, when the music box 8 moves downward to the bottom position, it can flip 90 degrees so that the side end surface of the music box 8 faces upward. When the music box 8 moves from back to front, the side end surface of the music box 8 is in contact with the polishing belt 10, that is, the first spur gear 19 is no longer meshed with the first spur rack 20, and the music box 8 no longer reciprocates left and right When the piano case 8 moves, the lower end position of the piano case 8 moves forward horizontally to polish the opposite end face. When the piano case 8 moves forward to the top position, that is, after the piano case 8 is out of contact with the polishing belt 10, the piano case 8 moves upward and forward while flipping over, so that the piano case 8 flips over 90 degrees again, that is, at this time the lower end face of the piano case 8 is facing upward. At this time, the first spur gear 19 can move upward to the same height position as the first spur rack 20. At this time, when the piano case 8 moves from front to back, it can move horizontally backward and reciprocate left and right at the upper end position under the engagement of the first spur gear 19 and the first spur rack 20. At this time, the polishing belt 10 can scan and polish the lower end face of the piano case 8, and the cycle is repeated over and over to polish multiple end faces of the piano case 8.

[0053] When the present invention is in use, by setting a movable polishing belt 10, after the piano case 8 contacts the polishing belt 10, the polishing belt 10 can polish the piano case 8 when it moves. When the piano case 8 moves forward or backward to the top position and flips over, multiple end surfaces of the piano case 8 can be polished in cooperation with the up and down movement of the polishing belt 10. The clamp seat 38 can be set to fix the piano case 8, even if the piano case 8 is fixed to the upper end of the support plate 18 and follows the forward and backward and up and down movement of the support plate 18, when the support plate 18 moves forward and backward, it can drive the piano case 8 to move forward and backward. When the support plate 18 moves forward or backward, it can move back and forth. At this time, the polishing belt 10 can perform a large-area scanning polishing on the upper end surface of the piano case 8; when the support plate 18 moves forward or backward to the top position, it can move up and down again. When the support plate 18 moves up and down, it can drive the clamping seat 38 and the piano case 8 to flip to a specified angle. Even if the piano case 8 is flipped 90 degrees, the other end surface of the piano case 8 can be polished again. Through multiple cycles, the upper, lower, left and right end surfaces of the piano case 8 are fully polished. The four end surfaces of the piano case 8 can be automatically polished instead of manual operation throughout the process, thereby reducing labor costs and improving polishing efficiency.

Claims

1. An automated polishing device for musical instrument production and processing, comprising a base plate (1), characterized in that: The upper end of the bottom plate (1) is provided with a horizontal frame (4) that can move up and down, and the horizontal frame (4) is provided with a movable grinding belt (10). The upper end of the bottom plate (1) is provided with a vertical plate (12), and a support plate (18) that can move forward and backward and up and down is installed on the vertical plate (12). The upper end of the support plate (18) is provided with a clamping device, and the clamping device includes two clamping seats (38) for clamping and fixing the piano case (8). When the support plate (18) moves backward, it can form a structure in which the piano case (8) moves backward and back and forth left and right; when the support plate (18) moves downward, it can form a structure in which the clamping seat (38) and the piano case (8) flip over.

2. The automatic polishing device for musical instrument production and processing as claimed in claim 1, characterized in that: The upper surface of the bottom plate (1) is fixedly connected to a frame (3); the cross frame (4) is slidably connected to the inner wall of the frame (3); first telescopic rods (5) are respectively fixedly connected to the left and right sides of the inner wall at the top of the frame (3); and the frame (3) is fixedly connected to the telescopic ends of the two first telescopic rods (5).

3. The automatic polishing device for musical instrument production and processing as claimed in claim 1, characterized in that: The left and right sides of the front end surface of the frame (3) are respectively fixedly connected to a first motor (11), the output ends of the first motor (11) are respectively fixedly connected to pulleys (7), an extrusion wheel (9) is provided at the lower end of the frame (3), and the grinding belt (10) is sleeved on the outer surfaces of the two pulleys (7) and the extrusion wheel (9).

4. The automatic polishing device for musical instrument production and processing as claimed in claim 1, characterized in that: A U-shaped seat (17) is slidably connected to an end surface of one side of the vertical plate (12); a second motor (13) is fixedly connected to an end surface of one side of the U-shaped seat (17); a threaded rod (14) rotatably connected to the U-shaped seat (17) is fixedly connected to an output end of the second motor (13); a bracket (16) is slidably connected to an inner wall of the U-shaped seat (17); a bracket (18) is fixedly connected to an upper end surface of the bracket (16); and a threaded cylinder (15) threadedly connected to the threaded rod (14) is provided in the middle of the bracket (16).

5. The automatic polishing device for musical instrument production and processing as claimed in claim 1, characterized in that: The upper end surface of the support plate (18) is slidably connected to an L-shaped seat (32), the right end surface of the L-shaped seat (32) is fixedly connected to a horizontal plate (36), the clamping seat (38) is respectively installed on the front and rear sides of the horizontal plate (36), the lower end of the support plate (18) is rotatably connected to a first spur gear (19), the right end surface of the vertical plate (12) is fixedly connected to a first spur rack (20) meshing with the first spur gear (19), the upper end of the first spur gear (19) is coaxially fixedly connected to a first disk (33), a second sliding pin (34) is fixedly connected to the non-center portion of the upper end surface of the first disk (33), and a long key plate (35) matching with the second sliding pin (34) is fixedly connected to the left end surface of the L-shaped seat (32).

6. The automatic polishing device for musical instrument production and processing as claimed in claim 4, characterized in that: A cylinder (22) is fixedly connected to the left end surface of the bracket (16), a first sliding pin (21) is slidably connected to the inner wall of the cylinder (22), a first spring (23) matched with the first sliding pin (21) is fixedly connected to the inner wall of the bottom end of the cylinder (22), a quadrilateral groove matched with the first sliding pin (21) is opened on the right end surface of the vertical plate (12), the quadrilateral groove includes an upper transverse groove (24), a first inclined groove (25), a lower transverse groove (26) and a second inclined groove (27), and a first guide seat (28) and a second guide seat (29) matched with the first sliding pin (21) are fixedly connected to the inner walls of the bottom ends of the first inclined groove (25) and the second inclined groove (27), respectively.

7. The automatic polishing device for musical instrument production and processing as claimed in claim 5, characterized in that: The inner walls of the front and rear ends of the transverse plate (36) are slidably connected to movable clamping plates (37), the clamping seats (38) are rotatably connected to the corresponding clamping plates (37), the outer ends of the two clamping seats (38) are coaxially fixedly connected to second spur gears (40), the outer end surfaces of the two clamping plates (37) are slidably connected to second spur racks (41) meshing with the second spur gears (40), the lower end of the L-shaped seat (32) is provided with an L-shaped plate (43) that can move left and right, the upper end surface of the L-shaped plate (43) is fixedly connected to a connecting plate (42), and the second spur racks (41) are slidably connected to the front and rear sides of the right end surface of the connecting plate (42).

8. The automatic polishing device for musical instrument production and processing as claimed in claim 7, characterized in that: A wedge-shaped block (48) is slidably connected to the inner wall of the lower end of the L-shaped seat (32), and a second spring (47) matching with the wedge-shaped block (48) is also provided on the inner wall of the lower end of the L-shaped seat (32). A plurality of triangular slots (49) matching with the wedge-shaped block (48) are provided on the upper end surface of the L-shaped plate (43). A first support pad (44) is fixedly connected to the left side of the upper end surface of the L-shaped plate (43), and a long spring (45) matching with the first support pad (44) is fixedly connected to the L-shaped seat (32).

9. The automatic polishing device for musical instrument production and processing as claimed in claim 8, characterized in that: The inner wall at the lower end of the L-shaped plate (43) is slidably connected to a plurality of movable pins (59), and the inner wall at the lower end of the L-shaped plate (43) is also provided with a plurality of third springs (58) matched with the movable pins (59). The lower end of the L-shaped seat (32) is provided with a push plate (53) capable of moving forward and backward, and the front and rear sides of the upper end surface of the push plate (53) are respectively fixedly connected to wedge-shaped plates (54), one end of the wedge-shaped plate (54) is respectively provided with a long inclined surface (55) matched with the movable pin (59), and the other end of the wedge-shaped plate (54) is respectively provided with a chamfered surface (56) matched with the movable pin (59), and a notch (57) is also provided in the middle of the two wedge-shaped plates (54).

10. The automatic polishing device for musical instrument production and processing as claimed in claim 9, characterized in that: The front and rear sides of the right end surface of the push plate (53) are respectively fixedly connected to a second support pad (52); the lower sides of the front and rear end surfaces of the L-shaped seat (32) are respectively fixedly connected to a center spring (51) that matches the second support pad (52); and the front and rear sides of the upper end surface of the bottom plate (1) are also respectively fixedly connected to a baffle (60) that matches the push plate (53).

Images