Steel belt cutting device for hose clamp production

Abstract

The invention is suitable for the technical field of metal cutting, and provides a hose clamp production steel belt cutting device which comprises a shell and further comprises a stretching assembly arranged in the shell, the stretching assembly comprises a sliding rod, a first sliding plate is slidably connected to the sliding rod, and vertical plates are symmetrically and fixedly connected to the bottom of the first sliding plate; a first rack is fixedly connected to the lower surface of the first sliding plate, a second sliding plate is slidably connected to the sliding rod and located below the first sliding plate, a second rack is fixedly connected to the upper surface of the second sliding plate, a second spring is fixedly connected between the first sliding plate and the second sliding plate, and a gear shaft is engaged between the first rack and the second rack. The hose clamp cutting device has the beneficial effects that after the hose clamp is cut off through press fit of the cutter and the base, the grinding plate slides in the cutter, so that cutting of the cutter on the hose clamp is not affected when the grinding plate is not stretched, the grinding plate can actively stretch out from the interior of the device after the hose clamp is cut off, and the section of the hose clamp is convenient to grind.

Description

Technical Field

[0001] This invention belongs to the field of metal cutting technology, and in particular relates to a steel strip cutting device for hose clamp production. Background Technology

[0002] In the production of hose clamps, steel strip cutting is one of the key processes, which directly affects the finished product quality and subsequent processing efficiency. At present, traditional hose clamp steel strip cutting devices have many shortcomings in practical applications.

[0003] Existing cutting equipment typically only cuts steel strips, and the cut surface of the hose clamps is prone to defects such as burrs and flash. These burrs can not only cause workers to be cut during handling and storage, but may also scratch the surface of other hose clamps during subsequent storage, affecting the product's appearance quality. This necessitates an additional grinding process, increasing the production process and costs.

[0004] Traditional equipment requires manual adjustment of the hose clamp's placement. During the cutting process, the hose clamp is prone to tilting, resulting in a deviation between the cut surface and the predetermined direction, which affects the assembly accuracy and performance of the hose clamp. Summary of the Invention

[0005] The purpose of this invention is to provide a steel strip cutting device for hose clamp production, which aims to solve the technical problems existing in the prior art mentioned in the background art.

[0006] The present invention is implemented as follows: a steel strip cutting device for hose clamp production includes a housing, and further includes: An extension assembly is disposed inside a housing. The extension assembly includes a slide rod, on which a first slide plate is slidably connected. A vertical plate is symmetrically fixedly connected to the bottom of the first slide plate. A first rack is fixedly connected to the lower surface of the first slide plate. A second slide plate is slidably connected to the slide rod and located below the first slide plate. A second rack is fixedly connected to the upper surface of the second slide plate. A second spring is fixedly connected between the first and second slide plates. A gear shaft meshes between the first and second racks. Grinding plates are symmetrically arranged inside the housing. A telescopic rod is fixedly connected between the two grinding plates. A cutting assembly, located inside the housing, is used to cut the hose clamp; The reciprocating assembly, located inside the housing, is used to grind the cross-section of the hose clamp using a grinding plate; A sliding component, located inside the housing, is used to limit the position of the cut hose clamp; The hose clamp alignment component, located inside the housing, is used to adjust the position of the hose clamp placed inside the equipment.

[0007] As a preferred technical solution of the present invention: the cutting assembly includes a turntable, which is symmetrically rotatably connected to the inner side wall of the housing. Both ends of the turntable are rotatably connected to connecting rods. The ends of the two connecting rods away from the turntable are rotatably connected to a first slide. The first slides are slidably connected to the inside of the housing. A pressure plate is slidably connected to the bottom of the upper first slide. A first spring is fixedly connected between the first slide and the pressure plate. A cutter is fixedly connected to the bottom of the pressure plate. A base is fixedly connected to the top of the lower first slide. The gear shaft is rotatably connected to the side wall of the cutter. The grinding plate is slidably connected to the wall surface of the cutter.

[0008] As another preferred technical solution of the present invention: the reciprocating assembly includes a bracket, the bracket is fixedly connected to the side wall of the tool, a toothed rod is rotatably connected inside the bracket, a disc is fixedly connected to both ends of the toothed rod, a third spring is fixedly connected between the disc and the bracket, a shaft is fixedly connected to the side of the disc away from the toothed rod, a groove is opened on the inner wall of the grinding plate, the shaft is slidably connected inside the groove, and a third rack that meshes with the toothed rod is fixedly connected to the bottom of the inner cavity of the base.

[0009] As another preferred technical solution of the present invention: the sliding component includes a baffle, the baffle is fixedly connected to the outer wall of the cutter, and inclined plates are fixedly connected to both sides of the lower surface of the baffle. A third sliding plate is slidably connected to the bottom of the baffle, and a fourth sliding plate is slidably connected to one side of the top of the base. A fourth spring is fixedly connected between the fourth sliding plate and the base, and inclined grooves are opened on both sides of the upper surface of the fourth sliding plate.

[0010] As another preferred technical solution of the present invention: the side of the base top that does not slide with the inclined groove is at the same height as the fourth sliding plate, and the lower surface of the inclined plate slides in conjunction with the inclined groove.

[0011] As another preferred technical solution of the present invention: the hose clamp alignment assembly includes an electric drive screw, which is installed inside the base. A second slide is threaded onto the electric drive screw, and a third slide is slidably connected to the second slide. A positioning plate is symmetrically rotatably connected to the third slide. A torsion spring is fixedly connected between the positioning plate and the third slide. A fifth spring is fixedly connected between the second slide and the third slide. The positioning plate is limited to rotate at a 90-degree angle by the third slide. An image processor is installed at the bottom of the pressure plate. The electric drive screw is driven by a motor inside the first slide. The image processor is electrically connected to the motor inside the first slide.

[0012] As another preferred technical solution of the present invention: the bottom of the second slide plate is inverted trapezoidal, the distance between the bottom of the inverted trapezoidal shape and the grinding plate is equal, and the bottom of the upright plate is in contact with the upper surface of the base.

[0013] As another preferred technical solution of the present invention: the shaft is eccentrically fixedly connected to the wall of the disk.

[0014] The beneficial effects of the embodiments of the present invention are as follows: 1. By pressing the cutter and the base together, the grinding plate slides inside the cutter after the hose clamp is cut off. This allows the grinding plate to remain in place without affecting the cutter's cutting of the hose clamp. After the hose clamp is cut off, the grinding plate can actively extend from inside the equipment, facilitating the grinding of the hose clamp's cross-section.

[0015] 2. By sliding the grinding plate back and forth inside the cutter, the grinding plate grinds the cut surface of the hose clamp, so that the cut surface of the hose clamp can be polished in time, and the burrs on the cut surface of the hose clamp can be removed in time. This prevents workers from cutting their hands on the burrs of the hose clamp when handling and storing it, and also prevents the hose clamp from being cut or damaged by the burrs of other hose clamps when it is stored.

[0016] 3. The image processor detects the angle of the hose clamp placed on the base. When the hose clamp is misaligned, the image processor controls the electric drive screw to rotate and the second carriage to slide inside the base to adjust its position. When the second carriage drives the third carriage to move laterally, the positioning plate restricts the hose clamp above the third carriage. As the third carriage moves laterally, the angle at which the hose clamp is placed on the base is adjusted, so that the hose clamp can maintain the verticality of the cross-section during cutting. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure provided in an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure provided in an embodiment of the present invention; Figure 3 Provided for embodiments of the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 Provided for embodiments of the present invention Figure 2 Enlarged schematic diagram of the structure at point B; Figure 5 This is an exploded view of the extension component structure provided in an embodiment of the present invention; Figure 6 Provided for embodiments of the present invention Figure 5 Schematic diagram of the structure at point C; Figure 7 This is a cross-sectional schematic diagram of the reciprocating component structure provided in an embodiment of the present invention; Figure 8 This is an exploded view of the sliding component structure provided in an embodiment of the present invention; Figure 9 Provided for embodiments of the present invention Figure 8 Schematic diagram of the structure at point D; Figure 10 This is an exploded view of the hose clamp alignment component structure provided in an embodiment of the present invention; Figure 11 Provided for embodiments of the present invention Figure 10 Enlarged schematic diagram of the structure at point E in the middle.

[0018] In the picture: 1. Housing; 2. Cutting assembly; 3. Extension assembly; 4. Reciprocating assembly; 5. Sliding assembly; 6. Hose clamp alignment assembly; 21. Turntable; 22. Connecting rod; 23. First carriage; 24. Pressure plate; 25. First spring; 26. Cutting tool; 27. Base; 31. Sliding rod; 32. Gear shaft; 33. First sliding plate; 34. Vertical plate; 35. First rack; 36. Second sliding plate; 37. Second rack; 38. Second spring; 39. Grinding plate; 310. Telescopic rod; 41. Bracket; 42. Gear rack; 43. Disc; 44. Third spring; 45. Shaft; 46. Slide groove; 47. Third gear rack; 51. Baffle; 52. Inclined plate; 53. Third slide; 54. Fourth slide; 55. Fourth spring; 56. Sloping groove; 61. Electric drive lead screw; 62. Second carriage; 63. Third carriage; 64. Positioning plate; 65. Torsion spring; 66. Fifth spring; 67. Image processor. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0021] like Figures 1 to 3 As shown, in one embodiment, a steel strip cutting device for hose clamp production is provided, including a housing 1, and further comprising: The extension assembly 3 is disposed inside the housing 1. The extension assembly 3 includes a slide rod 31, a first slide plate 33 is slidably connected to the slide rod 31, a vertical plate 34 is symmetrically fixedly connected to the bottom of the first slide plate 33, a first rack 35 is fixedly connected to the lower surface of the first slide plate 33, a second slide plate 36 is slidably connected to the slide rod 31 and located below the first slide plate 33, a second rack 37 is fixedly connected to the upper surface of the second slide plate 36, a second spring 38 is fixedly connected between the first slide plate 33 and the second slide plate 36, a gear shaft 32 meshes between the first rack 35 and the second rack 37, grinding plates 39 are symmetrically arranged inside the housing 1, and a telescopic rod 310 is fixedly connected between the two grinding plates 39. Cutting component 2, located inside housing 1, is used for cutting hose clamps; The reciprocating component 4 is located inside the housing 1 and is used to grind the cross-section of the hose clamp by means of the grinding plate 39; The sliding component 5, located inside the housing 1, is used to limit the position of the cut hose clamp; The hose clamp alignment component 6 is located inside the housing 1 and is used to adjust the position of the hose clamp placed inside the equipment.

[0022] In practical application, the cutting tool 26 and the base 27 are relatively close to each other and punch the hose clamp to cut it off. After the cutting tool 26 is inserted into the base 27, the hose clamp located between the cutting tool 26 and the base 27 will be cut into two sections. As the cutting tool 26 continues to move into the base 27, the hose clamp will fit against the upper surface of the base 27 and be horizontal with the grinding plate 39. When the cutting tool 26 and the base 27 are close enough that the upper surface of the base 27 exerts upward pressure on the upright plate 34, the upright plate 34 will drive the first sliding plate 33 to slide upward on the sliding rod 31. When the first sliding plate 33 moves upward, it will pass through the first tooth. The meshing of the rack 35 and the gear shaft 32 causes the second rack 37 to slide downwards. When the second rack 37 slides downwards, it will squeeze the grinding plate 39 through the second slide plate 36. The telescopic rod 310 between the grinding plates 39 extends after being squeezed, increasing the distance between the two grinding plates 39, thus fitting against the cut-off sides of the hose clamp. The grinding plate 39 slides inside the cutter 26 after the hose clamp is cut by the pressing of the cutter 26 and the base 27. This allows the grinding plate 39 to not affect the cutter 26's cutting of the hose clamp when it is not extended. After the hose clamp is cut off, the grinding plate 39 can actively extend from inside the equipment, which is convenient for grinding the cut-off side of the hose clamp.

[0023] like Figure 1As shown, in a preferred embodiment of the present invention, the cutting assembly 2 includes a turntable 21, which is symmetrically rotatably connected to the inner wall of the housing 1. Two connecting rods 22 are rotatably connected to both ends of the turntable 21. The ends of the two connecting rods 22 away from the turntable 21 are rotatably connected to a first slide 23. The first slides 23 are slidably connected to the inside of the housing 1. A pressure plate 24 is slidably connected to the bottom of the upper first slide 23. A first spring 25 is fixedly connected between the first slide 23 and the pressure plate 24. A cutter 26 is fixedly connected to the bottom of the pressure plate 24. A base 27 is fixedly connected to the top of the lower first slide 23. A gear shaft 32 is rotatably connected to the side wall of the cutter 26. A grinding plate 39 is slidably connected to the wall of the cutter 26.

[0024] In practical application, the user controls the turntable 21 to rotate and drives the first slides 23 on the upper and lower sides to slide relative to each other via the connecting rod 22. When the upper first slide 23 moves downward, it will drive the pressure plate 24 at its bottom to move downward together. When the pressure plate 24 moves downward and the lower first slide 23 moves upward, the cutter 26 and the base 27 will engage and cut the hose clamp. When the cutter 26 and the base 27 engage and cut the hose clamp, the first spring 25 will buffer the operation of the equipment through elastic extension and contraction.

[0025] like Figures 4 to 7 As shown, in another preferred embodiment of the present invention, the reciprocating assembly 4 includes a bracket 41, which is fixedly connected to the side wall of the cutter 26. A toothed rod 42 is rotatably connected inside the bracket 41. Both ends of the toothed rod 42 are fixedly connected to a disc 43. A third spring 44 is fixedly connected between the disc 43 and the bracket 41. A shaft 45 is fixedly connected to the side of the disc 43 away from the toothed rod 42. A groove 46 is provided on the inner wall of the grinding plate 39. The shaft 45 is slidably connected inside the groove 46. A third rack 47 that meshes with the toothed rod 42 is fixedly connected to the bottom of the inner cavity of the base 27.

[0026] In practical application, when the tool 26 and the base 27 are close to each other, the third rack 47 located inside the base 27 will mesh with the rack 42 and drive the rack 42 to rotate. When the rack 42 rotates, it will drive the disk 43 and the shaft 45 to rotate together. When the shaft 45 rotates inside the groove 46 of the grinding plate 39, because the shaft 45 is eccentrically set on the wall of the disk 43, the shaft 45 will drive the grinding plate 39 to slide back and forth on both sides of the outer wall of the tool 26 through the groove 46. When the extension assembly 3 is engaged with the cutter 26 and the base 27, the grinding plates 39 on both sides slide relatively far apart and fit against the cut surfaces of the two hose clamps. As the grinding plates 39 slide back and forth inside the cutter 26, they grind the cut surfaces of the hose clamps, so that the cut surfaces of the hose clamps can be polished in time, and the burrs on the cut surfaces of the hose clamps can be cleaned in time. This prevents workers from cutting their hands on the burrs of the hose clamps when handling and storing them, and also prevents the hose clamps from being cut or damaged by the burrs of other hose clamps during storage.

[0027] like Figure 8 and Figure 9 As shown, in another preferred embodiment of the present invention, the sliding component 5 includes a baffle 51, which is fixedly connected to the outer wall of the cutter 26. Inclined plates 52 are fixedly connected to both sides of the lower surface of the baffle 51. A third sliding plate 53 is slidably connected to the bottom of the baffle 51. A fourth sliding plate 54 is slidably connected to one side of the top of the base 27. A fourth spring 55 is fixedly connected between the fourth sliding plate 54 and the base 27. Inclined grooves 56 are provided on both sides of the upper surface of the fourth sliding plate 54.

[0028] In practical application, when the cutter 26 and the base 27 are close to each other, the baffle 51 and the inclined plate 52 will move downward together with the cutter 26. When the inclined plate 52 and the fourth slide plate 54 come into contact, the inclined surface of the lower surface of the inclined plate 52 will squeeze the fourth slide plate 54 through the inclined groove 56, causing the fourth slide plate 54 to move on the base 27 towards the side closer to the cutter 26. When the fourth slide plate 54 moves, the fourth spring 55 will be elastically stretched. When the fourth slide plate 54 moves, it will drive the hose clamp placed on its upper surface to move towards the side closer to the cutter 26 through friction. This will cause the cross-section of the hose clamp to move towards the grinding plate 39 and fit against the wall of the grinding plate 39.

[0029] like Figure 9 As shown, in another preferred embodiment of the present invention, the side of the base 27 that is not slidably grooved 56 is at the same height as the fourth slide plate 54, and the lower surface of the inclined plate 52 is slidably engaged with the inclined groove 56.

[0030] like Figure 10 and Figure 11As shown, in another preferred embodiment of the present invention, the hose clamp alignment assembly 6 includes an electric drive screw 61, which is installed inside the base 27. A second slide 62 is threaded onto the electric drive screw 61, and a third slide 63 is slidably connected to the second slide 62. A positioning plate 64 is symmetrically rotatably connected to the third slide 63. A torsion spring 65 is fixedly connected between the positioning plate 64 and the third slide 63. A fifth spring 66 is fixedly connected between the second slide 62 and the third slide 63. The positioning plate 64 is limited to rotate by the third slide 63 at a 90-degree angle. An image processor 67 is installed at the bottom of the pressure plate 24. The electric drive screw 61 is driven by a motor inside the first slide 23. The image processor 67 is electrically connected to the motor inside the first slide 23.

[0031] In practical application, the image processor 67 detects the angle of the hose clamp placed on the base 27. When the image processor 67 detects that the hose clamp is not at a 90-degree angle on the base 27, cutting the hose clamp with the cutter 26 and the base 27 will result in an inclined cross-section, which is not conducive to the storage and use of the finished hose clamp. Therefore, after detecting the state of the hose clamp, the image processor 67 controls the electric drive screw 61 to rotate and causes the second slide 62 to slide inside the base 27 to adjust its position. When frame 62 slides, it will drive the third slide 63 to move together. When the third slide 63 moves, the positioning plate 64 will contact the hose clamp placed on the base 27. Because the positioning plate 64 can only rotate inward 90 degrees on the third slide 63, when the third slide 63 moves laterally, the positioning plate 64 will restrict the hose clamp above the third slide 63. As the third slide 63 moves laterally, the angle of the hose clamp on the base 27 will be adjusted with the lateral movement of the third slide 63, so that the hose clamp can maintain the verticality of the cross-section during cutting.

[0032] like Figure 1 and Figure 7 As shown, in another preferred embodiment of the present invention, the bottom of the second slide plate 36 is inverted trapezoidal, the distance between the bottom of the inverted trapezoidal shape and the grinding plate 39 is equal, and the bottom of the upright plate 34 is in contact with the upper surface of the base 27.

[0033] like Figure 6 As shown, in another preferred embodiment of the present invention, the shaft 45 is eccentrically fixed to the wall of the disk 43.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel strip cutting device for hose clamp production, comprising a housing (1), characterized in that, Also includes: An extension assembly (3) is disposed inside the housing (1). The extension assembly (3) includes a slide rod (31), on which a first slide plate (33) is slidably connected. A vertical plate (34) is symmetrically fixedly connected to the bottom of the first slide plate (33). A first rack (35) is fixedly connected to the lower surface of the first slide plate (33). A second slide plate (36) is slidably connected to the slide rod (31) and below the first slide plate (33). A second rack (37) is fixedly connected to the upper surface of the second slide plate (36). A second spring (38) is fixedly connected between the first slide plate (33) and the second slide plate (36). A gear shaft (32) meshes between the first rack (35) and the second rack (37). Grinding plates (39) are symmetrically arranged inside the housing (1). A telescopic rod (310) is fixedly connected between the two grinding plates (39). The cutting component (2) is located inside the housing (1) and is used to cut the hose clamp; The reciprocating assembly (4) is located inside the housing (1) and is used to grind the cross-section of the hose clamp by means of the grinding plate (39); The sliding component (5) is located inside the housing (1) and is used to limit the cut hose clamp; The hose clamp alignment component (6) is located inside the housing (1) and is used to adjust the position of the hose clamp placed inside the equipment.

2. The steel strip cutting device for hose clamp production according to claim 1, characterized in that, The cutting assembly (2) includes a turntable (21), which is symmetrically rotatably connected to the inner wall of the housing (1). The two ends of the turntable (21) are respectively rotatably connected to connecting rods (22). The ends of the two connecting rods (22) away from the turntable (21) are rotatably connected to a first slide (23). The first slide (23) is slidably connected to the inside of the housing (1). The bottom of the upper first slide (23) is slidably connected to a pressure plate (24). A first spring (25) is fixedly connected between the first slide (23) and the pressure plate (24). The bottom of the pressure plate (24) is fixedly connected to a cutter (26). The top of the lower first slide (23) is fixedly connected to a base (27). The gear shaft (32) is rotatably connected to the side wall of the cutter (26). The grinding plate (39) is slidably connected to the wall of the cutter (26).

3. The steel strip cutting device for hose clamp production according to claim 2, characterized in that, The reciprocating assembly (4) includes a bracket (41), which is fixedly connected to the side wall of the cutter (26). A rack (42) is rotatably connected inside the bracket (41). A disc (43) is fixedly connected to both ends of the rack (42). A third spring (44) is fixedly connected between the disc (43) and the bracket (41). A shaft (45) is fixedly connected to the side of the disc (43) away from the rack (42). A groove (46) is provided on the inner wall of the grinding plate (39). The shaft (45) is slidably connected inside the groove (46). A third rack (47) that meshes with the rack (42) is fixedly connected to the bottom of the inner cavity of the base (27).

4. The steel strip cutting device for hose clamp production according to claim 2, characterized in that, The sliding assembly (5) includes a baffle (51), which is fixedly connected to the outer wall of the cutter (26). Inclined plates (52) are fixedly connected to both sides of the lower surface of the baffle (51). A third sliding plate (53) is slidably connected to the bottom of the baffle (51). A fourth sliding plate (54) is slidably connected to one side of the top of the base (27). A fourth spring (55) is fixedly connected between the fourth sliding plate (54) and the base (27). Inclined grooves (56) are provided on both sides of the upper surface of the fourth sliding plate (54).

5. The steel strip cutting device for hose clamp production according to claim 4, characterized in that, The side of the base (27) with the non-sliding groove (56) is at the same height as the fourth slide plate (54), and the lower surface of the inclined plate (52) slides in conjunction with the groove (56).

6. The steel strip cutting device for hose clamp production according to claim 2, characterized in that, The hose clamp alignment assembly (6) includes an electric drive screw (61), which is installed inside the base (27). A second slide (62) is threaded onto the electric drive screw (61), and a third slide (63) is slidably connected to the second slide (62). A positioning plate (64) is symmetrically rotatably connected to the third slide (63). A torsion spring (65) is fixedly connected between the positioning plate (64) and the third slide (63). A fifth spring (66) is fixedly connected between the second slide (62) and the third slide (63). The positioning plate (64) is limited to rotate at a 90-degree angle by the third slide (63). An image processor (67) is installed at the bottom of the pressure plate (24). The electric drive screw (61) is driven by a motor inside the first slide (23). The image processor (67) is electrically connected to the motor inside the first slide (23).

7. The steel strip cutting device for hose clamp production according to claim 2, characterized in that, The bottom of the second slide plate (36) is inverted trapezoidal, and the distance between the bottom of the inverted trapezoid and the grinding plate (39) is equal. The bottom of the upright plate (34) is in contact with the upper surface of the base (27).

8. The steel strip cutting device for hose clamp production according to claim 3, characterized in that, The shaft (45) is eccentrically fixed to the wall of the disk (43).

Images