Efficient paper product cutting equipment

Abstract

The utility model relates to the technical field of paper product cutting, and discloses efficient paper product cutting equipment which comprises a cutting table, sliding blocks are connected to the left end and the right end of the cutting table in a sliding mode, vertical plates are fixedly connected to the top ends of the sliding blocks, and a cutting assembly is arranged at the top end of the cutting table. The bottom end of the cutting assembly is fixedly connected with the top ends of the two vertical plates, the cutting assembly is used for cutting the laminated paper products on the cutting table, a fixing plate is fixedly connected to the position, at the bottom end of the cutting assembly, of the upper middle portions of the opposite sides of the vertical plates, and a first through groove is formed in the middle of the fixing plate; and through grooves II are formed in four corners of the fixing plate. According to the paper product cutting device, the electric telescopic rod, the second motor and the positioning assembly are matched with one another, paper products are fixed and prevented from moving in the cutting process, the cutting assembly and the positioning assembly are matched with one another, the cutting knife can be polished, and the service life of the cutting knife is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of paper product cutting, in particular to a highly efficient paper product cutting device. Background Art

[0002] With the booming development of e-commerce and online retail, the demand for paper products such as cartons and cartons has increased dramatically, which requires paper product cutting equipment to be able to efficiently and quickly complete a large number of orders to meet market demand. The quality of paper products directly affects the appearance and performance of the final product. Efficient cutting equipment can provide precise cutting to ensure that the size, shape and edge quality of paper products meet strict standards.

[0003] The operator first sets the corresponding parameters on the control panel of the cutting equipment according to the size and shape of the paper product to be cut, such as cutting length, width, angle, etc., and places the paper product on the workbench of the cutting equipment. After the cutting equipment is started, the cutting head will move along the set path according to the preset parameters to accurately cut the paper product.

[0004] In order to improve the cutting efficiency of paper products, some cutting devices allow a stack of related papers to be placed on a cutting table. However, some existing cutting devices using blades cannot fix the paper materials when cutting the stack of paper products to be cut, which causes the paper materials to be displaced, affecting the final cutting result. In addition, the blades of the cutting devices will wear out, reducing the service life of the blades. Therefore, an efficient paper product cutting device is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an efficient paper product cutting device, aiming to improve the problems in the prior art that the paper material cannot be fixed, resulting in errors in the cutting results, and the blade will wear out after long-term use, reducing the service life of the blade.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an efficient paper product cutting device, comprising a cutting table, the left and right ends of the cutting table are slidably connected with sliding blocks, the tops of the sliding blocks are fixedly connected with vertical plates, the top of the cutting table is provided with a cutting assembly, the bottom ends of the cutting assemblies are fixedly connected with the tops of the two vertical plates, the cutting assembly is used to cut the laminated paper products on the cutting table, the middle and upper parts of the opposite sides of the vertical plates are fixedly connected with a fixed plate at the bottom end of the cutting assembly, the middle part of the fixed plate is provided with a through slot 1, the four corners of the fixed plate are provided with through slots 2, the top of the fixed plate is fixedly connected with fixed blocks at the front and back, the left and right ends of the two fixed blocks are fixed The movable plate is fixedly connected with an electric push rod, and the output ends of the two left and right electric push rods are fixedly connected with a moving block, and the top front end of the moving block is fixedly connected with a motor 2, and the front and rear ends of the moving block are rotatably connected with a screw rod 2, and the outer sides of the two screw rods are fixedly connected with a pulley 2 inside the moving block, and the pulley 2 is connected through a belt 2, and the screw rod 2 is slidingly connected with the through groove 2 on the same side, and the bottom end of the screw rod 2 is fixedly connected with a limited block, and positioning components are provided on the left and right sides of the bottom end of the fixed plate, and the two positioning components are respectively threadedly connected with the screw rod 2 on the same side, and the top of the screw rod 2 on the front side is fixedly connected with the output end of the motor 2 on the same side, and the positioning component is used to fix laminated paper products of different widths.

[0007] As a further description of the above technical scheme: the cutting assembly includes a horizontal plate, the bottom of the horizontal plate is fixedly connected to the top of the vertical plate, the bottom of the horizontal plate is provided with a T-shaped groove, the top right end of the top of the horizontal plate is fixedly connected to a motor, the output end of the motor is fixedly connected to a rotating shaft, the right end of the rotating shaft is rotatably connected to a support block, the bottom end of the support block is fixedly connected to the top of the horizontal plate

[0008] As a further description of the above technical solution: the blade passes through a through slot 1, and the width of the through slot 1 is greater than the width of the blade.

[0009] As a further description of the above technical solution: the positioning components are symmetrical to each other, the positioning component on the left side includes a moving plate, the moving plate is threadedly connected to two screw rods on the same side, the right end of the moving plate is fixedly connected to a connecting plate, the front and rear sides of the right end of the connecting plate are fixedly connected to clamping plates, the opposite ends of the two clamping plates are fixedly connected to sharpening plates, the right ends of the clamping plates are provided with two T-shaped grooves, the right ends of the clamping plates are provided with pressure plates, the top ends of the pressure plates are fixedly connected to gravity blocks, and the left ends of the pressure plates are A T-shaped block 2 is fixedly connected, and the T-shaped block 2 is slidably connected to the T-shaped slot 2 on the same side. The top of the T-shaped block 2 is fixedly connected to a spring, and the spring is fixedly connected to the top of the T-shaped slot 2 on the same side. A connecting groove 1 and a connecting groove 2 are respectively provided on the opposite sides of the front bottom of the front side of the clamping plate and the rear side of the clamping plate. A collection frame is slidably connected inside the connecting groove 1, and a rotating plate is rotatably connected to the rear side of the right end of the collection frame. A collection box is fitted inside the collection frame, and a rack is fixedly connected to the front end of the collection frame.

[0010] As a further description of the above technical solution: the rack is slidably connected to the front clamping plate, and the length and height of the connecting groove 1 are consistent with the length and height of the connecting groove 2.

[0011] As a further description of the above technical solution: a movable groove is opened at the bottom of the left end of the connecting plate, a knob is arranged inside the movable groove, the knob is rotatably connected to the right end of the movable groove, the right end of the knob is fixedly connected to a connecting shaft, and the right end of the connecting shaft is fixedly connected to a gear inside the front splint.

[0012] As a further description of the above technical solution: the outer end bottom of the gear is meshed and connected with the top end of the rack, and the length of the collecting frame is consistent with the length of the sharpening plate.

[0013] As a further description of the above technical solution: the radius of the movable groove is greater than the radius of the knob, and the knob does not contact the top of the cutting table.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, when the clamping plate and the left and right sides of the paper product are on the same horizontal line, the second motor is started to move the movable plate downward to clamp the paper product, and the pressing plate stays on the top of the paper product. The weight of the gravity block prevents the pressing plate from moving upward during the cutting process, thereby pressing the paper product, thereby fixing the paper product during the cutting process and preventing the paper product from being displaced.

[0016] 2. In the utility model, the blade is moved upward by telescopic control block, and motor 1 is started to clamp the left or right end of the blade between adjacent sharpening plates, and then the knob is rotated to make the rear end of the collection frame fit with the rear end of the connecting groove 2, and then motor 2 is started to move the sharpening plate up and down, and the sharpening plate grinds the blade, and the iron filings from the grinding enter the interior of the collection box, thereby extending the service life of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional schematic diagram of an efficient paper product cutting device proposed by the utility model;

[0018] Figure 2 This is a front cross-sectional view of a transverse plate of an efficient paper product cutting device proposed by the utility model;

[0019] Figure 3 A top cross-sectional view of a moving block of an efficient paper product cutting device proposed by the utility model;

[0020] Figure 4 This is a front side cross-sectional view of a moving plate, a connecting plate and a clamping plate of an efficient paper product cutting device proposed by the utility model;

[0021] Figure 5 The utility model provides a cross-sectional top view of the bottom ends of a connecting plate and a clamping plate of an efficient paper product cutting device.

[0022] Legend:

[0023] 1. Cutting table; 2. Sliding block; 3. Vertical plate; 4. Horizontal plate; 5. T-shaped slot 1; 6. Motor 1; 7. Rotating shaft; 8. Support block; 9. Pulley 1; 10. Belt 1; 11. Screw rod 1; 12. T-shaped block 1; 13. Telescopic control block; 14. Blade; 15. Fixed plate; 16. Through slot 1; 17. Through slot 2; 18. Fixed block; 19. Electric push rod; 20. Moving block; 21. Screw rod 2; 22. Pulley 2; 23. Belt 2; 24. Motor 2; 25. Limit block; 26. Moving plate; 27. Connecting plate; 28. Clamping plate; 29. ​​Sharpening plate; 30. T-slot 2; 31. Pressing plate; 32. Gravity block; 33. T-block 2; 34. Spring; 35. Connecting slot 1; 36. Connecting slot 2; 37. Collecting frame; 38. Rotating plate; 39. Collecting box; 40. Rack; 41. Movable slot; 42. Knob; 43. Connecting shaft; 44. Gear. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1 and Figure 3 The utility model provides an embodiment: an efficient paper product cutting device, comprising a cutting table 1, the left and right ends of the cutting table 1 are slidably connected with sliding blocks 2, the tops of the sliding blocks 2 are fixedly connected with vertical plates 3, the top of the cutting table 1 is provided with a cutting assembly, the bottom ends of the cutting assemblies are fixedly connected with the tops of the two vertical plates 3, the cutting assembly is used to cut the laminated paper products on the cutting table 1, the middle and upper parts of the opposite sides of the vertical plates 3 are fixedly connected with a fixed plate 15 at the bottom end of the cutting assembly, the middle part of the fixed plate 15 is provided with a through slot 16, the four corners of the fixed plate 15 are provided with through slots 2 17, the top of the fixed plate 15 is fixedly connected with fixed blocks 18 at the front and back, the left and right ends of the two fixed blocks 18 are fixedly connected with electric push rods 19, The output ends of the two groups of left and right electric push rods 19 are fixedly connected to the moving blocks 20, and the top front ends of the moving blocks 20 are fixedly connected to the motor 24. The front and rear ends of the moving blocks 20 are rotatably connected to the screw rods 21. The outer sides of the two screw rods 21 are fixedly connected to the pulleys 22 inside the moving blocks 20. The pulleys 22 are connected through the belts 23. The screw rods 21 are slidably connected to the through grooves 17 on the same side. The bottom ends of the screw rods 21 are fixedly connected to the limiting blocks 25. Positioning components are provided on the left and right sides of the bottom end of the fixed plate 15. The two positioning components are respectively threadedly connected to the screw rods 21 on the same side. The top ends of the front screw rods 21 are fixedly connected to the output ends of the motors 24 on the same side. The positioning components are used to fix laminated paper products of different widths.

[0026] The sliding block 2 can slide on the left and right ends of the cutting table 1, and can drive the horizontal plate 4 and the fixed plate 15 to move synchronously through the vertical plate 3, so that the center of the positioning assembly is aligned with the cutting line of the paper product. Starting the electric push rod 19 can drive the opposite side of the positioning assembly on the left and right sides to be on the same horizontal line as the left and right sides of the paper product on the top of the cutting table 1, and then start the motor 24 to rotate the front side screw rod 21 and the pulley 22, drive the belt 23 to move, thereby driving the rear side pulley 22 and the screw rod 21 to rotate, and the front and rear screw rods 21 have the same thread direction, so the positioning assembly is driven to move upward or downward synchronously, thereby fixing the paper product, and then the paper product is cut by the cutting assembly, and the cutting assembly and the positioning assembly cooperate with each other to grind the cutting knife, thereby extending the service life of the cutting knife.

[0027] Reference Figure 1 and Figure 2 The cutting assembly includes a horizontal plate 4, the bottom of the horizontal plate 4 is fixedly connected to the top of the vertical plate 3, a T-shaped slot 5 is opened at the bottom end of the horizontal plate 4, a motor 6 is fixedly connected to the top right end of the horizontal plate 4, a rotating shaft 7 is fixedly connected to the output end of the motor 6, a support block 8 is rotatably connected to the right end of the rotating shaft 7, the bottom end of the support block 8 is fixedly connected to the top of the horizontal plate 4, a pulley 9 is arranged on the outer side of the rotating shaft 7 and the inner right end of the horizontal plate 4, the two pulleys 9 are connected by a belt 10, and the upper pulley 9 It is fixedly connected to the rotating shaft 7, the lower pulley 9 is rotatably connected to the cross plate 4, the middle part of the lower pulley 9 is fixedly connected with a screw rod 11, the left end of the screw rod 11 is rotatably connected to the left end of the T-shaped slot 5, the outer side of the screw rod 11 is threadedly connected with a T-shaped block 12, the bottom end of the T-shaped block 12 is rotatably connected with a telescopic control block 13, the inside of the telescopic control block 13 is slidably connected with a blade 14, the blade 14 passes through a through slot 16, and the width of the through slot 16 is greater than the width of the blade 14.

[0028] The starting motor 6 drives the rotating shaft 7 and the upper pulley 9 to rotate, so that the belt 10 is displaced, thereby driving the lower pulley 9 to rotate. When the lower pulley 9 rotates, the screw rod 11 is driven to rotate synchronously, thereby driving the T-shaped block 12 to move left and right inside the T-shaped slot 5. The telescopic control block 13 can control the blade 14 to slide downward a certain distance, so that the bottom of the blade 14 contacts the top of the cutting table 1, thereby completing the cutting of the paper product.

[0029] Reference Figure 3 , Figure 4 and Figure 5The positioning components are symmetrical with each other. The left positioning component includes a movable plate 26, which is threadedly connected to the same-side screw rod 21. The right end of the movable plate 26 is fixedly connected to a connecting plate 27. The right end of the connecting plate 27 is fixedly connected to a clamping plate 28 on both sides. The opposite ends of the two clamping plates 28 are fixedly connected to a sharpening plate 29. The right end of the clamping plate 28 is provided with a T-slot 230. The right end of the clamping plate 28 is provided with a pressing plate 31. The top of the pressing plate 31 is fixedly connected to a gravity block 32. The left end of the pressing plate 31 is fixedly connected to a T-block 233. The T-block 233 is slidably connected to the T-slot 230 on the same side. The top of the T-block 233 is fixedly connected to a spring 34. The spring 34 is fixedly connected to the top of the T-slot 230 on the same side. The front side clamping plate 28 and the rear side clamping plate 28 are respectively provided with a connecting groove 1 and a connecting groove 236 on the opposite side of the front bottom of the front end. A collecting frame 37 is slidably connected to the inside of the groove 1 35, and a rotating plate 38 is rotatably connected to the rear right end of the collecting frame 37. A collecting box 39 is fitted inside the collecting frame 37, and a rack 40 is fixedly connected to the front end of the collecting frame 37, and the rack 40 is slidably connected to the front side clamping plate 28. The length and height of the connecting groove 1 35 are consistent with the length and height of the connecting groove 2 36. A movable groove 41 is provided at the bottom of the left end of the connecting plate 27, and a knob 42 is provided inside the movable groove 41. The knob 42 is rotatably connected to the right end of the movable groove 41, and the right end of the knob 42 is fixedly connected to a connecting shaft 43. The right end of the connecting shaft 43 is fixedly connected to a gear 44 inside the front side clamping plate 28, and the outer end bottom of the gear 44 is meshed with the top end of the rack 40. The length of the collecting frame 37 is consistent with the length of the sharpening plate 29, the radius of the movable groove 41 is larger than the radius of the knob 42, and the knob 42 does not contact the top of the cutting table 1.

[0030] When the clamping plate 28 and the left and right sides of the paper product are on the same horizontal line, the movable plate 26 is moved downward, and the connecting plate 27, the clamping plate 28, the pressing plate 31 and the gravity block 32 are synchronously driven to move downward. The pressing plate 31 contacts the top of the paper product during the downward movement of the clamping plate 28. Since the T-shaped block 23 is slidably connected to the inside of the T-shaped slot 230, the pressing plate 31 stays at the top of the paper product. The weight of the gravity block 32 prevents the pressing plate 31 from moving upward during the cutting process, thereby pressing the paper product. The sharpening plate 29 can grind the surface of the blade 14. The knob 42 is rotated to make the connecting shaft 43 drive the gear 44 to rotate, thereby causing the rack 40 to be displaced, thereby driving the collecting frame 37 to move synchronously. When the rear end of the collecting frame 37 is in contact with the rear end of the connecting slot 236, the iron filings dropped by grinding can enter the interior of the collecting box 39. The rotating plate 38 is rotated to open, and the collecting box 39 can be taken out to process the iron filings inside the collecting box 39.

[0031] Working principle: first, place neatly stacked paper products on the top of the sliding block 2, and then according to the required cutting length, the sliding block 2 and the vertical plate 3 drive the horizontal plate 4 and the fixed plate 15 to move, so that the center between the adjacent clamping plates 28 is aligned with the cutting line, and then the electric push rod 19 is started to make the opposite side of the clamping plates 28 on the left and right sides and the left and right sides of the stack of paper products be on the same horizontal line, and then the motor 24 is started to make the clamping plate 28 drive the connecting plate 27 and the clamping plate 28 on the same side to move downward, so as to clamp the stack of paper products, and the pressing plate 31 contacts the top of the paper products during the downward movement of the clamping plate 28, and then the pressing plate 31 stays on the top of the paper products, and the weight of the gravity block 32 prevents the pressing plate 31 from cutting. During the cutting process, the blade 14 moves upward, thereby pressing the paper product, and then the blade 14 slides out of the telescopic control block 13 for a certain distance, so that the bottom of the blade 14 contacts the top of the cutting table 1, and then the motor 16 is started to cut the paper product on the cutting table 1, so that the cutting surface of the paper product is flat, and the blade 14 is retracted by the telescopic control block 13, so that the blade 14 moves upward, and the left end or the right end of the blade 14 is stuck between adjacent sharpening plates 29, and then the knob 42 is rotated to make the rear end of the collecting frame 37 fit with the rear end of the connecting groove 2 36, and then the motor 24 is started to move the sharpening plate 29 up and down, and the sharpening plate 29 grinds the blade 14, and the iron filings polished enter the interior of the collecting box 39.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An efficient paper product cutting device, comprising a cutting table (1), characterized in that: The left and right ends of the cutting table (1) are slidably connected to sliding blocks (2), the top ends of the sliding blocks (2) are fixedly connected to vertical plates (3), the top end of the cutting table (1) is provided with a cutting assembly, the bottom ends of the cutting assembly are fixedly connected to the top ends of the two vertical plates (3), and the cutting assembly is used to cut the laminated paper products on the cutting table (1), the middle and upper parts of the opposite sides of the vertical plates (3) are fixedly connected to a fixed plate (15) at the bottom end of the cutting assembly, the middle part of the fixed plate (15) is provided with a through slot 1 (16), the four corners of the fixed plate (15) are provided with through slots 2 (17), the top end of the fixed plate (15) is fixedly connected to a fixed block (18) at the front and back, the left and right ends of the two fixed blocks (18) are fixedly connected to an electric push rod (19), and the output ends of the two groups of left and right electric push rods (19) are fixedly connected. A moving block (20) is fixedly connected, and the top front end of the moving block (20) is fixedly connected to a second motor (24). The front and rear ends of the moving block (20) are rotatably connected to a second screw rod (21). The outer sides of the two second screw rods (21) are fixedly connected to a second pulley (22) inside the moving block (20). The second pulley (22) is connected through a second belt (23). The second screw rod (21) is slidably connected to the second through groove (17) on the same side. The bottom end of the second screw rod (21) is fixedly connected to a limited block (25). Positioning components are provided on the left and right sides of the bottom end of the fixed plate (15). The two positioning components are respectively threadedly connected to the second screw rod (21) on the same side. The top end of the second screw rod (21) on the front side is fixedly connected to the output end of the second motor (24) on the same side. The positioning components are used to fix laminated paper products of different widths.

2. The efficient paper product cutting device according to claim 1, characterized in that: The cutting assembly comprises a transverse plate (4), the bottom of the transverse plate (4) is fixedly connected to the top of the vertical plate (3), a T-shaped slot (5) is provided at the bottom end of the transverse plate (4), a motor (6) is fixedly connected to the right end of the top of the transverse plate (4), a rotating shaft (7) is fixedly connected to the output end of the motor (6), a support block (8) is rotatably connected to the right end of the rotating shaft (7), the bottom end of the support block (8) is fixedly connected to the top of the transverse plate (4), a pulley (9) is provided on the outer side of the rotating shaft (7) and the right end of the inner side of the transverse plate (4), and the two pulleys (9) are fixedly connected to the right end of the rotating shaft (7). (9) is connected through a belt (10), the upper pulley (9) is fixedly connected to the rotating shaft (7), the lower pulley (9) is rotatably connected to the transverse plate (4), the middle part of the lower pulley (9) is fixedly connected to a screw rod (11), the left end of the screw rod (11) is rotatably connected to the left end of the T-shaped slot (5), the outer side of the screw rod (11) is threadedly connected to a T-shaped block (12), the bottom end of the T-shaped block (12) is rotatably connected to a telescopic control block (13), and the inside of the telescopic control block (13) is slidably connected to a blade (14).

3. The efficient paper product cutting device according to claim 2, characterized in that: The blade (14) passes through a through slot (16), and the width of the through slot (16) is greater than the width of the blade (14).

4. The efficient paper product cutting device according to claim 1, characterized in that: The positioning components are symmetrical to each other. The positioning component on the left side includes a movable plate (26), the movable plate (26) is threadedly connected to the second screw rod (21) on the same side, the right end of the movable plate (26) is fixedly connected to a connecting plate (27), the front and rear sides of the right end of the connecting plate (27) are fixedly connected to clamping plates (28), the opposite ends of the two clamping plates (28) are fixedly connected to a sharpening plate (29), the right end of each clamping plate (28) is provided with a second T-shaped slot (30), the right end of each clamping plate (28) is provided with a pressing plate (31), the top end of each pressing plate (31) is fixedly connected to a gravity block (32), and the left end of each pressing plate (31) is fixedly connected to a second T-shaped block (33). The two T-shaped blocks (33) are both slidably connected to the two T-shaped slots (30) on the same side. The top of the two T-shaped blocks (33) is fixedly connected to a spring (34). The spring (34) is fixedly connected to the top of the two T-shaped slots (30) on the same side. The front side clamping plate (28) and the rear side clamping plate (28) are respectively provided with a connecting groove (35) and a connecting groove (36) on the opposite side of the front end bottom. The interior of the connecting groove (35) is slidably connected to a collection frame (37). The rear side of the right end of the collection frame (37) is rotatably connected to a rotating plate (38). The interior of the collection frame (37) is fitted with a collection box (39). The front end of the collection frame (37) is fixedly connected to a rack (40).

5. The efficient paper product cutting device according to claim 4, characterized in that: The rack (40) is slidably connected to the front clamping plate (28), and the length and height of the connecting groove 1 (35) are consistent with the length and height of the connecting groove 2 (36).

6. The efficient paper product cutting device according to claim 4, characterized in that: A movable groove (41) is provided at the bottom of the left end of the connecting plate (27), a knob (42) is provided inside the movable groove (41), the knob (42) is rotatably connected to the right end of the movable groove (41), the right end of the knob (42) is fixedly connected to a connecting shaft (43), and the right end of the connecting shaft (43) is fixedly connected to a gear (44) inside the front side clamping plate (28).

7. The efficient paper product cutting device according to claim 6, characterized in that: The outer bottom of the gear (44) is meshed with the top of the rack (40), and the length of the collecting frame (37) is consistent with the length of the sharpening plate (29).

8. The efficient paper product cutting device according to claim 6, characterized in that: The radius of the movable groove (41) is greater than the radius of the knob (42), and the knob (42) does not contact the top of the cutting table (1).

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