Edge grinding and shaping device for microcrystal panel

Abstract

The utility model discloses a microcrystal panel edging and shaping device which comprises a working table, a first conveying belt and a second conveying belt are arranged on the working table in a spaced mode, a clamping assembly is arranged between the first conveying belt and the second conveying belt, a transferring assembly is further arranged on the working table, an edging assembly is further arranged on the working table, and the edging assembly is arranged between the first conveying belt and the second conveying belt. The edge grinding assembly comprises a base connected to the workbench, a mounting base is connected to the base, a connecting shaft is rotationally connected to the mounting base, a support is rotationally connected to the connecting shaft, the support is connected with a grinding piece, and the support is provided with a first transmission assembly capable of driving the grinding piece to rotate. A fixing frame is connected to the mounting base, and a second transmission assembly capable of driving the connecting shaft to rotate is arranged between the fixing frame and the connecting shaft. The utility model aims to overcome the problems in the prior art and provides the microcrystal panel edging and shaping device capable of automatically edging the microcrystal panel.

Description

Technical Field

[0001] The utility model relates to the field of microcrystalline panel processing, in particular to a microcrystalline panel edge grinding and shaping device. Background Art

[0002] Microcrystalline panel is a mixture of microcrystals and glass made by sintering and crystallizing glass particles and quartz crystals. It has a hard, dense and uniform texture, and is pollution-free during the production process. The product itself has no radioactive pollution. It is a new type of environmentally friendly green material. Microcrystalline panel requires edge grinding during the production and processing.

[0003] At present, when processing some existing microcrystalline panels, personnel still need to use equipment to manually grind and repair the rough edges on the four sides of the microcrystalline panels. The processing efficiency is low and cannot meet the needs of users.

[0004] The utility model is produced based on the above-mentioned shortcomings. Utility Model Content

[0005] The utility model aims to overcome the problems of the prior art and provides a microcrystalline panel edge grinding and shaping device which can automatically grind the edges of the microcrystalline panel.

[0006] In order to achieve the above purpose, the utility model adopts the following scheme:

[0007] A microcrystalline panel edge grinding and shaping device comprises a workbench, wherein a first conveyor belt and a second conveyor belt capable of transporting the microcrystalline panel are arranged at intervals on the workbench, a clamping assembly capable of positioning, clamping and transporting the microcrystalline panel is arranged between the first conveyor belt and the second conveyor belt, the workbench is also provided with a transfer assembly capable of transporting the microcrystalline panel on the first conveyor belt to the clamping assembly for processing and transferring the processed microcrystalline panel from the clamping assembly to the second conveyor belt, the workbench is also provided with an edge grinding assembly capable of edge grinding and shaping the microcrystalline panel clamped on the clamping assembly, the edge grinding assembly comprises a base connected to the workbench, a mounting seat is connected to the base, a connecting shaft capable of rotating relative to the mounting seat is connected to the mounting seat, a bracket capable of rotating with the mounting shaft is connected to the connecting shaft, a grinding piece is connected to the front end of the bracket, a first transmission assembly capable of driving the grinding piece to rotate is arranged on the top of the bracket, a fixing frame is connected to the side of the mounting seat away from the grinding piece, and a second transmission assembly capable of driving the connecting shaft to rotate is arranged between the fixing frame and the connecting shaft.

[0008] A limiting assembly capable of limiting the rotation range of the connecting shaft is provided between the second transmission assembly and the fixing frame.

[0009] A connecting plate is connected to the mounting seat, and the second transmission assembly includes a cylinder rotatably connected to the connecting plate. The end of the connecting shaft away from the grinding piece is connected to the rotating piece. A protruding first protrusion is provided on the rotating piece at a position deviating from the center of the rotating axis. The telescopic shaft of the cylinder is rotatably connected to the first protrusion, and the output shaft can drive the connecting shaft to rotate relative to the mounting seat when extending or retracting relative to the cylinder.

[0010] The limiting assembly includes a second protrusion arranged on the first protrusion, the second protrusion is arranged to deviate from the rotation axis of the rotating member and away from the first protrusion, the first limiting member and the second limiting member are rotatably connected to the fixing frame, a movable space for the second protrusion to move is provided between the first limiting member and the second limiting member, the first limiting member is provided with a first supporting surface that can be abutted against the second protrusion, and the second limiting member is provided with a second supporting surface that can be abutted against the second protrusion.

[0011] The limiting assembly also includes a slide rail arranged transversely on the fixed frame, the slide rail is connected to a sliding seat that can slide along it, the second protrusion is connected to a roller that can rotate relative to it, and the sliding seat is provided with a strip groove for the roller to slide inside.

[0012] The limiting assembly also includes a connecting piece connected to the telescopic shaft, and an elastic member is provided between the connecting piece and the connecting plate.

[0013] A first displacement component is provided between the mounting seat and the base, which enables the mounting seat to move relative to the base.

[0014] The first displacement assembly includes a screw rod rotatably connected to the base, and the base is also provided with a plurality of connecting columns located on both sides of the screw rod. The lower end of the mounting seat is connected to a plurality of sliders that can slide on the connecting columns. The mounting seat is slidably connected to the screw rod through a nut provided at its lower end. The base is also connected to a first rotating motor that can drive the screw rod to rotate and thereby make the mounting seat slide along the connecting columns.

[0015] The grinding piece includes a first rotating shaft rotatably connected to the front end of the bracket, the end of the first rotating shaft is also connected to a grinding knife, the bracket is also connected to an outer cover, the grinding knife is arranged in the outer cover, and the outer cover is provided with a notch that allows part of the grinding knife to be exposed.

[0016] The first transmission assembly includes a second rotating motor connected to the top of the bracket, the output shaft of the second rotating motor is connected to a first roller that can rotate with it, the polishing piece is connected to a second roller, and a conveyor belt is provided between the second roller and the first roller.

[0017] Compared with the existing technology, the utility model has the following advantages: when adopting the present structure, the user places the microcrystalline panel on the first conveyor belt, and the transfer component clamps and sucks the microcrystalline panel when the microcrystalline panel reaches the predetermined position, and transports the microcrystalline panel from the first conveyor belt to the clamping component, and the clamping component clamps the microcrystalline panel, and the first transmission component is started. When the first transmission component is started, the grinding piece wants to rotate the bracket, and the second transmission component is started. After the second transmission component is started, it drives the connecting shaft to rotate, and then drives the bracket to rotate relative to the mounting seat, so that the grinding piece follows the movement of the bracket to form an arc movement, and the microcrystalline panel is edged and shaped. The microcrystalline panel is rotated by the clamping component to complete the shaping of the four sides of the entire microcrystalline panel. When the shaping is completed, the transfer component clamps and sucks the microcrystalline panel again to transfer the microcrystalline panel from the clamping component to the second conveyor belt, and the second conveyor belt is transferred to the outside. When in use, the device can complete the automatic transportation and edge grinding of the microcrystalline panel, and is very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the microcrystalline panel edge grinding and shaping device of the utility model;

[0019] Figure 2 This is one of the structural schematic diagrams of the edge grinding component in the microcrystalline panel edge grinding and shaping device of the utility model;

[0020] Figure 3 This is the second structural schematic diagram of the edge grinding component in the microcrystalline panel edge grinding and shaping device of the utility model;

[0021] Figure 4 This is one of the exploded views of the edge grinding assembly in the microcrystalline panel edge grinding and shaping device of the utility model;

[0022] Figure 5 This is the second exploded view of the edge grinding component in the microcrystalline panel edge grinding and shaping device of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the second transmission component and the limiter component in the microcrystalline panel edge grinding and shaping device of the utility model;

[0024] Figure 7 This is an exploded view of the limiter assembly in the microcrystalline panel edge grinding and shaping device of the utility model;

[0025] Figure 8 It is a side view of the limiting component in the microcrystalline panel edge grinding and shaping device of the utility model;

[0026] Fig. 9 This is a state diagram of the microcrystalline panel edge grinding and shaping device of the utility model when it is in use.

[0027] Reference numerals: workbench 1; first conveyor belt 2; second conveyor belt 3; clamping assembly 4; transfer assembly 5; edge grinding assembly 6, base 61, mounting seat 62, connecting plate 621, connecting shaft 63, bracket 64, grinding member 65, first rotating shaft 651, grinding knife 652, outer cover 653, notch 6531, first transmission assembly 66, second rotating motor 661, first roller 662, second roller 663, conveyor belt 664, fixing frame 67, second transmission assembly 68, cylinder 68 1. Telescopic shaft 6811, rotating member 682, first protrusion 683, limiting assembly 69, second protrusion 691, first limiting member 692, first top support surface 6921, second limiting member 693, second top support surface 6931, activity space 694, slide rail 695, sliding seat 696, strip groove 6961, roller 697, connecting piece 698, elastic member 699, first displacement assembly 7, screw rod 71, connecting column 72, slider 73, nut 74, first rotating motor 75. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the embodiments:

[0029] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] like Figures 1 to 9 As shown, a microcrystalline panel edge grinding and shaping device comprises a workbench 1, on which a first conveyor belt 2 and a second conveyor belt 3 capable of conveying microcrystalline panels are arranged at intervals, between which a clamping assembly 4 capable of positioning, clamping and conveying the microcrystalline panel is arranged, and on which a transfer assembly 5 capable of conveying the microcrystalline panel on the first conveyor belt 2 to the clamping assembly 4 for processing and transferring the processed microcrystalline panel from the clamping assembly 4 to the second conveyor belt 3 is arranged, and on which a grinding assembly 6 capable of grinding and shaping the microcrystalline panel clamped on the clamping assembly 4 is arranged, and the grinding assembly 6 capable of grinding and shaping the microcrystalline panel clamped on the clamping assembly 4 is arranged, and the grinding assembly 6 capable of grinding and shaping the microcrystalline panel clamped on the clamping assembly 4 is arranged, and the grinding assembly 6 capable of grinding and shaping the microcrystalline panel clamped on the clamping assembly 4 is arranged, and the grinding assembly 6 capable of positioning, clamping and conveying the microcrystalline panel is arranged between the first conveyor belt 2 and the second conveyor belt 3 ... The edge component includes a base 61 connected to the workbench 1, the base 61 is connected to a mounting seat 62, the mounting seat 62 is connected to a connecting shaft 63 that can rotate relative to it, the connecting shaft 63 is connected to a bracket 64 that can rotate with it, the front end of the bracket 64 is connected to a grinding piece 65, the top of the bracket 64 is provided with a first transmission component 66 that can drive the grinding piece 65 to rotate, the side of the mounting seat 62 away from the grinding piece 65 is connected to a fixing frame 67, and a second transmission component 68 that can drive the connecting shaft 63 to rotate is provided between the fixing frame 67 and the connecting shaft 63.

[0031] When the present structure is adopted, the user places the microcrystalline panel on the first conveyor belt 2, and the transfer component 5 clamps and sucks the microcrystalline panel when it reaches the predetermined position, and transports the microcrystalline panel from the first conveyor belt 2 to the clamping component 4, and the clamping component 4 clamps the microcrystalline panel, and the first transmission component 66 is started. When the first transmission component 66 is started, the grinding piece 65 wants to rotate the bracket 64, and the second transmission component 68 is started. After the second transmission component 68 is started, it drives the connecting shaft 63 to rotate, and then drives the bracket 64 to rotate relative to the mounting seat 62, so that the grinding piece 65 follows the movement of the bracket 64 to form an arc movement, and the microcrystalline panel is edged and shaped. The microcrystalline panel is rotated by the clamping component 4, so as to complete the shaping of the four sides of the entire microcrystalline panel. When the shaping is completed, the transfer component 5 clamps and sucks the microcrystalline panel again to transfer the microcrystalline panel from the clamping component 4 to the second conveyor belt 3, and the second conveyor belt 3 is transferred to the outside. When in use, the present device can complete the automatic transportation and edge grinding of the microcrystalline panel, and is very convenient to use.

[0032] like Figures 6 to 9 As shown, a limiter assembly 69 capable of limiting the rotation range of the connecting shaft 63 is provided between the second transmission assembly 68 and the fixing frame 67. Since the side edge of the microcrystalline panel needs to be trimmed in a small range, the limiter assembly 69 is provided to limit the rotation range of the second transmission assembly 68, so that the trimming accuracy is higher and defective products are reduced.

[0033] like Figures 6 to 9 As shown, the mounting seat 62 is connected with a connecting plate 621, the second transmission assembly 68 includes a cylinder 681 rotatably connected to the connecting plate 621, the end of the connecting shaft 63 away from the grinding member 65 is connected to the rotating member 682, and the rotating member 682 is provided with a protruding first protrusion 683 at a position deviating from the rotating axis, the telescopic shaft 6811 of the cylinder 681 is rotatably connected to the first protrusion 683, and the output shaft can drive the connecting shaft 63 to rotate relative to the mounting seat 62 when extending or retracting relative to the cylinder 681. When the cylinder 681 is started, the telescopic shaft 6811 in the cylinder 681 extends outward, and when the telescopic shaft 6811 extends outward, it pushes the first protrusion 683 and the telescopic shaft 6811 also rotates relative to the first protrusion 683, and the first protrusion 683 drives the rotating member 682 to rotate, thereby causing the connecting shaft 63 to rotate relative to the mounting seat 62.

[0034] like Figures 6 to 9As shown, the limiting assembly 69 includes a second protrusion 691 arranged on the first protrusion 683, the second protrusion 691 is arranged offset from the rotation axis of the rotating member 682 and away from the first protrusion 683, the first limiting member 692 and the second limiting member 693 are rotatably connected to the fixing frame 67, and a movable space 694 is provided between the first limiting member 692 and the second limiting member 693 for the second protrusion 691 to move, the first limiting member 692 is provided with a first supporting surface 6921 that can be abutted against the second protrusion 691, and the second limiting member 693 is provided with a second supporting surface 6931 that can be abutted against the second protrusion 691. When the rotating member 682 rotates, the second protrusion 691 on the rotating member 682 also rotates with the rotating member 682 and then moves in the movable space 694, thereby limiting the rotation range of the connecting shaft 63. The first limit member 692 and the second limit member 693 are connected to the fixed frame 67 through threads. Therefore, the size of the movable space 694 is determined by the positions of the first limit member 692 and the second limit member 693, thereby determining the edge grinding range of the grinding member 65.

[0035] like Figures 6 to 9 As shown, the position limiting assembly 69 further comprises a slide rail 695 transversely arranged on the fixing frame 67, a slide seat 696 capable of sliding along the slide rail 695 is connected to the slide rail 695, a roller 697 capable of rotating relative to the second protrusion 691 is connected to the slide rail 695, and a strip groove 6961 capable of sliding the roller 697 is provided on the slide seat 696. When the second protrusion 691 moves, the roller 697 is driven to move, and when the roller 697 slides along the strip groove 6961, it pushes the inner wall of the strip groove 6961, thereby driving the slide seat 696 to slide along the slide rail 695, and the slide seat 696 moves in the activity space 694, so that the slide seat 696 can respectively abut against the first abutting surface 6921 and the second abutting surface 6931, thereby limiting the moving range of the grinding member 65.

[0036] like Figures 6 to 9 As shown, the limit assembly 69 further includes a connecting piece 698 connected to the telescopic shaft 6811, and an elastic member 699 is provided between the connecting piece 698 and the connecting plate 621. The elastic member 699 is a tension spring, and when the telescopic shaft 6811 extends outward, it will be subjected to tension, so that the pre-tightening force is maintained between the telescopic shaft 6811 and the connecting plate 621, ensuring that the relative position between the connecting piece 698 and the connecting plate 621 remains stable during the telescopic shaft 6811. At the same time, the elastic member 699 can provide necessary elastic restrictions to prevent excessive telescopic extension or movement.

[0037] like Figure 2 and Figure 4As shown, a first displacement assembly 7 is provided between the mounting seat 62 and the base 61, which enables the mounting seat 62 to move relative to the base 61. The first displacement assembly 7 is used to move the mounting seat 62, thereby enabling the device to process microcrystalline panels of different sizes.

[0038] like Figure 2 and Figure 4 As shown, the first displacement assembly 7 includes a screw rod 71 rotatably connected to the base 61, and the base 61 is also provided with a plurality of connecting posts 72 located on both sides of the screw rod 71. The lower end of the mounting seat 62 is connected with a plurality of sliders 73 that can slide on the connecting posts 72. The mounting seat 62 is slidably connected to the screw rod 71 through a nut 74 provided at its lower end. The base 61 is also connected with a first rotating motor 75 that can drive the screw rod 71 to rotate and thus make the mounting seat 62 slide along the connecting posts 72. When the mounting seat 62 needs to be moved, the first rotating motor 75 is started, and the first rotating motor 75 rotates to drive the screw rod 71 to rotate, and the screw rod 71 rotates to drive the nut 74 to slide along it. At this time, the mounting seat 62 is driven by the nut 74 to slide back and forth relative to the base 61. The plurality of sliders 73 and the plurality of connecting posts 72 are used to cooperate to make the mounting seat 62 more smooth when sliding.

[0039] like Figure 2 and Figure 3 As shown, the grinding member 65 includes a first rotating shaft 651 rotatably connected to the front end of the bracket 64, and a grinding knife 652 is also connected to the end of the first rotating shaft 651. The bracket 64 is also connected to an outer cover 653. The grinding knife 652 is arranged in the outer cover 653. The outer cover 653 is provided with a notch 6531 that can allow part of the grinding knife 652 to be exposed. The outer cover 653 can prevent dust from splashing outward during the processing of the microcrystalline panel, thereby reducing dust. The grinding knife 652 is used to grind the edge of the microcrystalline panel.

[0040] like Figure 2 and Figure 3 As shown, the first transmission assembly 66 includes a second rotating motor 661 connected to the top of the bracket 64, the output shaft of the second rotating motor 661 is connected to a first roller 662 that can rotate with it, the grinding piece 65 is connected to a second roller 663, and a conveyor belt 664 is arranged between the second roller 663 and the first roller 662. The second roller 663 is arranged on the first rotating shaft 651. When the second rotating motor 661 is started, the output shaft of the second rotating motor 661 drives the first roller 662 to rotate, the first roller 662 drives the conveyor belt 664 to rotate, the conveyor belt 664 drives the second roller 663 to rotate, and when the second roller 663 rotates, it drives the first rotating shaft 651 to rotate and then drives the grinding knife 652.

[0041] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A microcrystalline panel edge grinding and shaping device, characterized in that: The invention comprises a workbench (1), wherein a first conveyor belt (2) and a second conveyor belt (3) capable of conveying microcrystalline panels are arranged at intervals on the workbench (1), a clamping assembly (4) capable of positioning, clamping and conveying the microcrystalline panels is arranged between the first conveyor belt (2) and the second conveyor belt (3), the workbench (1) is also provided with a transfer assembly (5) capable of conveying the microcrystalline panels on the first conveyor belt (2) to the clamping assembly (4) for processing and transferring the processed microcrystalline panels from the clamping assembly (4) to the second conveyor belt (3), the workbench (1) is also provided with an edge grinding assembly (6) capable of edge grinding and shaping the microcrystalline panels clamped on the clamping assembly (4), the edge grinding assembly (6) comprising a device connected to the workbench (1) and a transfer assembly (5) capable of conveying the microcrystalline panels on the first conveyor belt (2) to the clamping assembly (4) for processing and transferring the processed microcrystalline panels from the clamping assembly (4) to the second conveyor belt (3), the workbench (1) is also provided with a device (6) capable of edge grinding and shaping the microcrystalline panels clamped on the clamping assembly (4), the device (6) comprising a device (6) connected to the workbench (1) and a transfer assembly (5) capable of conveying the microcrystalline panels on the first conveyor belt (2) to the clamping assembly (4) for processing and transferring the processed microcrystalline panels from the clamping assembly (4) to the second conveyor belt (3), A base (61) is provided on a table (1), wherein the base (61) is connected to a mounting seat (62), the mounting seat (62) is connected to a connecting shaft (63) which can rotate relative to the mounting seat, the connecting shaft (63) is connected to a bracket (64) which can rotate with the connecting shaft, the front end of the bracket (64) is connected to a grinding piece (65), the top of the bracket (64) is provided with a first transmission assembly (66) which can drive the grinding piece (65) to rotate, the side of the mounting seat (62) away from the grinding piece (65) is connected to a fixing frame (67), and a second transmission assembly (68) which can drive the connecting shaft (63) to rotate is provided between the fixing frame (67) and the connecting shaft (63).

2. The microcrystalline panel edge grinding and shaping device according to claim 1, characterized in that: A limiting assembly (69) capable of limiting the rotation range of the connecting shaft (63) is provided between the second transmission assembly (68) and the fixing frame (67).

3. The microcrystalline panel edge grinding and shaping device according to claim 2, characterized in that: The mounting seat (62) is connected to a connecting plate (621), the second transmission assembly (68) includes a cylinder (681) rotatably connected to the connecting plate (621), the end of the connecting shaft (63) away from the grinding member (65) is connected to a rotating member (682), a protruding first protrusion (683) is provided on the rotating member (682) at a position deviating from the rotating axis, the telescopic shaft (6811) of the cylinder (681) is rotatably connected to the first protrusion (683), and the output shaft can drive the connecting shaft (63) to rotate relative to the mounting seat (62) when extending or retracting relative to the cylinder (681).

4. The microcrystalline panel edge grinding and shaping device according to claim 3, characterized in that: The limiting assembly (69) includes a second protrusion (691) arranged on the first protrusion (683), the second protrusion (691) is arranged to deviate from the rotation axis of the rotating member (682) and away from the first protrusion (683), the first limiting member (692) and the second limiting member (693) are rotatably connected to the fixed frame (67), a movable space (694) for the second protrusion (691) to move is provided between the first limiting member (692) and the second limiting member (693), the first limiting member (692) is provided with a first supporting surface (6921) that can be abutted against the second protrusion (691), and the second limiting member (693) is provided with a second supporting surface (6931) that can be abutted against the second protrusion (691).

5. The microcrystalline panel edge grinding and shaping device according to claim 4, characterized in that: The limiting assembly (69) further comprises a slide rail (695) arranged transversely on the fixing frame (67), the slide rail (695) being connected to a slide seat (696) capable of sliding along the slide rail, the second protrusion (691) being connected to a roller (697) capable of rotating relative to the second protrusion, and the slide seat (696) being provided with a strip groove (6961) capable of allowing the roller (697) to slide therein.

6. The microcrystalline panel edge grinding and shaping device according to claim 5, characterized in that: The position limiting assembly (69) further comprises a connecting piece (698) connected to the telescopic shaft (6811), and an elastic member (699) is provided between the connecting piece (698) and the connecting plate (621).

7. The microcrystalline panel edge grinding and shaping device according to claim 1, characterized in that: A first displacement component (7) is provided between the mounting seat (62) and the base (61), which enables the mounting seat (62) to move relative to the base (61).

8. The microcrystalline panel edge grinding and shaping device according to claim 7, characterized in that: The first displacement assembly (7) comprises a screw rod (71) rotatably connected to the base (61); the base (61) is also provided with a plurality of connecting columns (72) located on both sides of the screw rod (71); the lower end of the mounting seat (62) is connected with a plurality of sliding blocks (73) capable of sliding on the connecting columns (72); the mounting seat (62) is slidably connected to the screw rod (71) via a nut (74) provided at its lower end; the base (61) is also connected with a first rotating motor (75) capable of driving the screw rod (71) to rotate and thereby causing the mounting seat (62) to slide along the connecting columns (72).

9. The microcrystalline panel edge grinding and shaping device according to claim 1, characterized in that: The grinding member (65) comprises a first rotating shaft (651) rotatably connected to the front end of the bracket (64); the end of the first rotating shaft (651) is also connected to a grinding knife (652); the bracket (64) is also connected to an outer cover (653); the grinding knife (652) is arranged in the outer cover (653); and the outer cover (653) is provided with a notch (6531) through which a part of the grinding knife (652) can be exposed.

10. The microcrystalline panel edge grinding and shaping device according to claim 1, characterized in that: The first transmission assembly (66) comprises a second rotating motor (661) connected to the top of the bracket (64); the output shaft of the second rotating motor (661) is connected to a first roller (662) capable of rotating with the second rotating motor (661); the polishing member (65) is connected to a second roller (663); and a conveyor belt (664) is provided between the second roller (663) and the first roller (662).

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