Robot three-frame automatic film pasting equipment

Abstract

The utility model relates to the technical field of robot film pasting, in particular to robot three-frame automatic film pasting equipment which comprises a film pasting jig, a mechanical arm and a film pasting device. The number of the film pasting jigs is at least two, every two adjacent film pasting jigs are arranged in a spaced mode and are perpendicular to each other, each film pasting jig is provided with an operation edge used for fixing the metal frame, and the at least two operation edges and the space between every two adjacent film pasting jigs are connected to form a film pasting operation moving line; the manipulator drives the film pasting device to move; the film pasting device is used for conveying the protective film belt and recycling the release film of the protective film belt. According to the utility model, all the operation edges are fixed on the metal frame through the film pasting jig, the manipulator drives the film pasting device to be close to the operation edges and move along the film pasting operation moving line, and the film pasting device pastes a protective film on the appearance surface of the metal frame fixed on the operation edges. And the film pasting position precision is accurately controlled, and the position deviation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of robot film pasting, in particular to an automatic three-side frame film pasting device for robots. Background Art

[0002] In recent years, various 3C digital products have emerged. In order to pursue high-quality metallic texture, metal frames are used on the frames of the products for decoration and protection. Taking the metal frame of an LCD TV as an example, the metal frame includes a frame with three continuous bent side strips. After the appearance surface of the metal frame undergoes various surface treatment processes such as wire drawing, sandblasting, and anodic oxidation, a high-quality and high-end texture effect is formed. Before the metal frame is shipped, in order to prevent problems such as scratches or fingerprint marks, the appearance surface of the metal frame is generally film-protected.

[0003] Currently, manual labor is used to paste the film on the appearance surface of the metal frame. When pasting the film, the operator walks around the product and pastes the film at the same time. It is difficult to control the accuracy of the pasting position, and it is easy to paste the film in the wrong position. Therefore, it is necessary to improve it. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an automatic three-side frame film pasting device for robots in view of the deficiencies of the prior art. The metal frame is fixed by the working edge of the film pasting fixture, the manipulator drives the film pasting device to approach the working edge and move along the film pasting operation line, and the film pasting device pastes a protective film on the appearance surface of the metal frame fixed on the working edge. The accuracy of the film pasting position is accurately controlled to avoid pasting the film in the wrong position.

[0005] To achieve the above purpose, an automatic three-side frame film pasting device for robots of the utility model includes a film pasting fixture, a manipulator, and a film pasting device;

[0006] At least two film pasting fixtures are provided, and two adjacent film pasting fixtures are spaced apart and arranged perpendicular to each other. Each film pasting fixture is provided with a working edge for fixing the metal frame, and at least two working edges are connected to the space between two adjacent film pasting fixtures to form a film pasting operation line;

[0007] The manipulator drives the film pasting device to move;

[0008] The film pasting device is used for conveying the protective film tape and recycling the release film of the protective film tape;

[0009] The manipulator drives the film pasting device to approach the working edge and move along the film pasting operation line, and the film pasting device pastes a protective film on the appearance surface of the metal frame fixed on the working edge.

[0010] Preferably, the film pasting fixture includes a fixing plate and a fixing clamp;

[0011] The working edge is arranged at the edge of the fixed plate, the working edge is in a shape of a circle, and a metal frame is placed on the working edge;

[0012] There are multiple fixing clamps, and the multiple fixing clamps are arranged along the inner side of the working edge.

[0013] Preferably, the fixing fixture comprises a first driver, a second driver and a holding member;

[0014] The fixing plate is provided with a plurality of fixing cavities along the inner side of the working edge, the first driver is fixed in the fixing cavity, and the first driver drives the second driver to extend and retract in the fixing cavity;

[0015] The second driver drives the pressing member to move closer to or away from the working edge.

[0016] Preferably, a plurality of limit blocks are provided on both sides of the working edge, and the plurality of limit blocks are fixed to the edge of the fixed plate, and a limit groove is formed between two limit blocks.

[0017] Preferably, the fixing plate is provided with a support member, the support member is arranged at the bottom of the fixing plate and both ends of the support member are provided with a yielding portion.

[0018] Preferably, the manipulator includes a fixing platform, a manipulator body and a mounting platform.

[0019] The fixing platform is arranged on one side of the film sticking fixture.

[0020] The robot body is arranged on the top of the fixing platform.

[0021] The mounting platform is arranged at the end of the robot body and is used to fix the film sticking device, and the film sticking device moves along with the movement of the mounting platform.

[0022] Preferably, the film laminating device comprises a fixed plate, a material collection and release plate, a film laminating head, a third driver, a pressure wheel, a fourth driver, a cutter and a fifth driver;

[0023] The fixed plate is fixed to the manipulator;

[0024] The unwinding and taking-up tray is rotatably arranged on the fixed tray and is used for conveying the protective film tape and winding up the release film of the protective film tape;

[0025] One end of the film laminating head is hinged to the fixed disk, one end of the third driver fixes the fixed disk, and the other end of the third driver is hinged to the film laminating head and drives the end of the film laminating head away from the fixed disk to approach or move away from the working edge;

[0026] The pressing wheel is arranged on one side of the film pasting head and is used to press the protective film tape against the appearance surface of the metal frame;

[0027] The fourth driver is fixed on the fixed disk and drives the pressing wheel to approach or move away from the working edge;

[0028] The cutting knife is arranged between the pressing wheel and the film pasting head and is used to cut the protective film tape;

[0029] The fifth driver is fixed on the fixed disk and is used to drive the cutting knife to perform telescopic movement so that the cutting knife cuts the protective film tape.

[0030] Preferably, the rewinding and feeding disk includes a main disk and a sub-disk;

[0031] The main disk is rotatably arranged on the fixed disk;

[0032] The number of the sub-disks is two, and the two are respectively arranged on both sides of the fixed disk and are used to convey the protective film tape or wind up the release film of the protective film tape.

[0033] Preferably, the film pasting head includes a swing frame, a first guide wheel, a separating rod, a second guide wheel, a guide block and a steering rod.

[0034] One end of the swing frame is hinged to the fixed disk, and the middle part of the swing frame is hinged to the third driver;

[0035] The first guide wheel is arranged at the end of the swing frame hinged to the fixed disk;

[0036] The separating rod and the second guide wheel are both arranged at the end of the swing frame far from the end of the swing frame hinged to the fixed disk;

[0037] The guide block is fixed on the fixed disk and there is a tape guiding gap between the guide block and the second guide wheel;

[0038] The steering rod is fixed on the fixed disk and is located above the first guide wheel.

[0039] The beneficial effects of the present utility model: The present utility model fixes the metal frame through the working edge of the film pasting fixture, the manipulator drives the film pasting device to approach the working edge and move along the film pasting operation moving line, and the film pasting device pastes the protective film on the appearance surface of the metal frame fixed on the working edge. The film pasting position accuracy is accurately controlled to avoid deviation of the pasting position. Description of the Drawings

[0040] Figure 1 It is a schematic structural diagram of the present utility model.

[0041] Figure 2 It is a schematic structural diagram of the film pasting fixture of the present utility model.

[0042] Figure 3 for Figure 2 A-section structure enlarged schematic diagram.

[0043] Figure 4 It is a schematic structural diagram of the film sticking device of the present utility model.

[0044] Reference numerals include:

[0045] 1. Film sticking jig; 11. Working edge; 12. Fixing plate; 120. Fixing cavity; 121. Support member; 122. Yielding portion; 13. Fixing fixture; 131. First driver; 132. Second driver; 133. Pressing member; 14. Limiting block;

[0046] 2. Robot; 21. Fixed platform; 22. Robot body; 23. Mounting platform;

[0047] 3. Film laminating device; 31. Fixed plate; 32. Material collection and unloading plate; 321. Main plate; 322. Sub-plate; 33. Film laminating head; 331. Swinging frame; 332. First guide wheel; 333. Disengagement rod; 334. Second guide wheel; 335. Guide block; 336. Turning rod; 34. Third driver; 35. Pressing wheel; 36. Fourth driver; 37. Cutter; 38. Fifth driver;

[0048] 100. Metal frame; 200. Film pasting operation line. DETAILED DESCRIPTION

[0049] The utility model is described in detail below with reference to the accompanying drawings.

[0050] like Figures 1 to 4 As shown, a robot three-frame automatic film pasting device of the utility model comprises a film pasting fixture 1, a robot arm 2 and a film pasting device 3.

[0051] At least two film sticking jigs 1 are provided, and two adjacent film sticking jigs 1 are spaced apart and arranged perpendicular to each other. Each film sticking jig 1 is provided with a working edge 11 for fixing the metal frame 100. At least two working edges 11 and the space between two adjacent film sticking jigs 1 are connected to form a film sticking operation line 200.

[0052] The robot arm 2 drives the film sticking device 3 to move.

[0053] The film sticking device 3 is used to convey the protective film tape and recover the release film of the protective film tape.

[0054] During use, the metal frame 100 is fixed by the working edge 11 of the film pasting fixture 1. The manipulator 2 drives the film pasting device 3 to approach the working edge 11 and move along the film pasting operation line 200. The film pasting device 3 pastes a protective film on the appearance surface of the metal frame 100 fixed on the working edge 11. The accuracy of the film pasting position is accurately controlled to avoid deviation of the pasting position.

[0055] When the film pasting operation on the metal frame 100 on the working edge 11 of the first film pasting fixture 1 is completed, the film pasting fixture 1 releases the metal frame 100 that has completed the film pasting. The metal frame 100 to be processed is fixed on the working edge 11 again manually or by the manipulator. The manipulator 2 drives the film pasting device 3 to move along the film pasting operation line 200, and uses the time difference of the film pasting operation to timely replace the metal frame 100 that has completed the film pasting and the metal frame 100 to be pasted with the protective film, so that the film pasting equipment operates continuously without interruption, improving the working efficiency of pasting the protective film on the metal frame 100.

[0056] As Figures 2 to 3 shown, the film pasting fixture 1 of this embodiment includes a fixing plate 12 and a fixing clamp 13.

[0057] The working edge 11 is arranged at the edge of the fixing plate 12. The working edge 11 is in a U-shaped form, and the metal frame 100 is placed on the working edge 11.

[0058] The number of the fixing clamps 13 is multiple, and the multiple fixing clamps 13 are arranged along the inner side of the working edge 11. The metal frame 100 is pressed against the working edge 11 by the fixing clamps 13 to fix the metal frame 100.

[0059] As Figure 3 shown, the fixing clamp 13 of this embodiment includes a first driver 131, a second driver 132 and a pressing member 133.

[0060] A plurality of fixing cavities 120 are respectively arranged along the inner side of the working edge 11 of the fixing plate 12. The first driver 131 is fixed in the fixing cavity 120, and the first driver 131 drives the second driver 132 to extend and retract in the fixing cavity 120.

[0061] The second driver 132 drives the pressing member 133 to approach or move away from the working edge 11.

[0062] During use, the first driver 131 drives the second driver 132 to extend out of the fixing cavity 120, and the second driver 132 drives the pressing member 133 to move away from the working edge 11, facilitating the placement of the metal frame 100 on the working edge 11. The first driver 131 drives the second driver 132 to retract into the fixing cavity 120, and at the same time the second driver 132 drives the pressing member 133 to approach the working edge 11, facilitating the fixing of the metal frame 100 on the working edge 11, and realizing the fixing of the metal frame 100 by the film pasting fixture 1.

[0063] Among them, the first driver 131 and the second driver 132 are conventional cylinders or oil cylinders.

[0064] As Figure 2 As shown, a plurality of limiting blocks 14 are arranged on both sides of the working edge 11 of this embodiment. The plurality of limiting blocks 14 are all fixed on the edge of the fixing plate 12, and a limiting groove is formed between two limiting blocks 14. The metal frame 100 is limited through the limiting groove, which facilitates the fixing of the metal frame 100 on the working edge 11.

[0065] As Figure 2 As shown, the fixing plate 12 of this embodiment is provided with a support member 121. The support member 121 is arranged at the bottom of the fixing plate 12 and yielding parts 122 are arranged at both ends of the support member 121. The fixing plate 12 is suspended through the yielding parts 122, which facilitates the manipulator 2 to drive the film attaching device 3 to move along the film attaching operation moving line 200.

[0066] Among them, the support member 121 is a support block or a support frame.

[0067] As Figure 1 As shown, the manipulator 2 of this embodiment includes a fixed platform 21, a manipulator body 22 and a mounting platform 23.

[0068] The fixed platform 21 is arranged on one side of the film attaching fixture.

[0069] The manipulator body 22 is arranged on the top of the fixed platform 21.

[0070] The mounting platform 23 is arranged at the end of the manipulator body 22 and is used to fix the film attaching device 3. The film attaching device 3 moves as the mounting platform 23 moves.

[0071] During use, the manipulator body 22 drives the mounting platform 23 to move, and the film attaching device 3 moves as the mounting platform 23 moves, so as to realize that the manipulator 2 drives the film attaching device 3 to approach the working edge 11 and move along the film attaching operation moving line 200.

[0072] Among them, the manipulator body 22 is a conventional 6-axis manipulator, which has six key axes, specifically including the X-axis, Y-axis, Z-axis and three rotation axes. The manipulator body 22 has a large degree of freedom and can perform more complex movements.

[0073] In actual use, a 6-axis robot with a 2-meter arm span is used, which can automatically attach films to the metal frames 100 of up to 85-inch TVs at most, and has a wide application range.

[0074] When using the automatic film attaching of this application, the film attaching time for an 85-inch frame is 60s. Compared with manual film attaching, the efficiency is increased by 60%, and the yield rate is increased by 40%.

[0075] Set up three workstations for automatic film pasting, saving the time occupied by the equipment waiting for manual material loading and unloading, and effectively improving the equipment utilization rate. Compared with manual film pasting, 2 labors are saved.

[0076] As Figure 4 shown, the film pasting device 3 of this embodiment includes a fixed disk 31, a material winding and unwinding disk 32, a film pasting head 33, a third driver 34, a pressing wheel 35, a fourth driver 36, a cutting knife 37 and a fifth driver 38.

[0077] The fixed disk 31 is fixed to the manipulator 2, so that the film pasting device 3 moves with the movement of the manipulator 2.

[0078] The material winding and unwinding disk 32 is rotatably arranged on the fixed disk 31 and is used for conveying the protective film tape and winding up the release film of the protective film tape.

[0079] One end of the film pasting head 33 is hinged to the fixed disk 31. One end of the third driver 34 is fixed to the fixed disk 31, and the other end of the third driver 34 is hinged to the film pasting head 33 and drives the end of the film pasting head 33 away from the fixed disk 31 to approach or move away from the working edge 11.

[0080] The pressing wheel 35 is arranged on one side of the film pasting head 33 and is used for pressing the protective film tape against the appearance surface of the metal frame 100.

[0081] The fourth driver 36 is fixed to the fixed disk 31 and drives the pressing wheel 35 to approach or move away from the working edge 11.

[0082] The cutting knife 37 is arranged between the pressing wheel 35 and the film pasting head 33 and is used for cutting the protective film tape.

[0083] The fifth driver 38 is fixed to the fixed disk 31 and is used for driving the cutting knife 37 to perform telescopic movement so that the cutting knife 37 cuts the protective film tape.

[0084] Before use, fix the roll-shaped protective film tape to one end of the material winding and unwinding disk 32. The roll-shaped protective film tape is wound around the film pasting head 33 through the material winding and unwinding disk 32. The protective film tape is separated from the release film of the protective film tape through the film pasting head 33, and the release film of the protective film tape is separated and then wound around the other end of the material winding and unwinding disk 32.

[0085] During use, as the manipulator 2 drives the film pasting device 3 to approach the working edge 11 and move along the film pasting operation moving line 200.

[0086] When the film pasting device 3 moves to the head end of the metal frame 100, the third driver 34 drives the film pasting head 33 to approach the working edge 11 by moving away from one end of the fixed disk 31 and presses it against the appearance surface of the head end of the metal frame 100, so that the protective film tape is pasted on the appearance surface of the metal frame 100. The feeding and discharging reel 32 rotates, and the protective film tape is pasted along the length direction of the appearance surface of the metal frame 100. The fourth driver 36 drives the pressing wheel 35 to compact the protective film tape pasted on the appearance surface of the metal frame 100.

[0087] Among them, the specific action of pasting the protective film along the length direction of the appearance surface of the metal frame 100 is to start pasting from the lower left end of the metal frame 100, paste to the upper side of the metal frame 100, then paste to the lower right end of the metal frame 100 as the end point, and automatically complete the pasting of the protective film around three sides of the metal frame 100.

[0088] When the film pasting device 3 moves to the end of the metal frame 100, the fifth driver 38 drives the cutter 37 to cut off the protective film tape, that is, the operation of pasting the protective film on the appearance surface of one metal frame 100 is completed. The manipulator 2 drives the film pasting device 3 to move along the film pasting operation moving line 200 and approach another working edge 11, and repeats the above operations to realize continuous pasting of the protective film on the appearance surface of the metal frame 100.

[0089] Among them, the third driver 34, the fourth driver 36 and the fifth driver 38 are all conventional cylinders or oil cylinders.

[0090] As Figure 4 shown, the feeding and discharging reel 32 of this embodiment includes a main reel 321 and a sub-reel 322.

[0091] The main reel 321 is rotatably arranged on the fixed disk 31.

[0092] The number of sub-reels 322 is two, and the two are respectively arranged on both sides of the fixed disk 31 and are used for conveying the protective film tape or winding up the release film of the protective film tape, so as to realize the feeding and discharging of the protective film tape by the feeding and discharging reel 32 and the winding up of the release film of the protective film tape.

[0093] Among them, the main reel 321 is a conventional electric turntable.

[0094] As Figure 4 shown, the film pasting head 33 of this embodiment includes a swing frame 331, a first guide wheel 332, a separating rod 333, a second guide wheel 334, a guide block 335 and a steering rod 336.

[0095] One end of the swing frame 331 is hinged to the fixed disk 31, and the middle part of the swing frame 331 is hinged to the third driver 34.

[0096] The first guide wheel 332 is arranged at the end of the swing frame 331 hinged to the fixed disk 31.

[0097] The separating rod 333 and the second guide wheel 334 are both arranged at one end of the swing frame 331 far from the hinge joint of the swing frame 331 and the fixed disk 31.

[0098] A guide block 335 is fixed to the fixed disk 31, and a tape guiding gap is provided between the guide block 335 and the second guide wheel 334.

[0099] The steering rod 336 is fixed to the fixed disk 31 and is located above the first guide wheel 332.

[0100] During use, the protective film tape is conveyed out from a secondary disk 322. The protective film tape winds around the separating rod 333 through the first guide wheel 332 to separate the protective film in the protective film tape from the release film. The release film of the protective film tape winds around the steering rod 336 along the tape guiding gap. The release film of the protective film tape returns to the other secondary disk 322 after being steered by the steering rod 336, so as to realize conveying the protective film tape by the reel 32 or winding the release film of the protective film tape.

[0101] When the protective film needs to be pasted, the third driver 34 drives one end of the swing frame 331 to rotate downward pressing against the working edge 11 along the hinge joint of the swing frame 331 and the fixed disk 31, and the protective film in the protective film tape will be pressed against the appearance surface of the metal frame 100. The reel 32 rotates as the film pasting device 3 moves, the protective film tape is conveyed, the protective film is pasted along the appearance surface of the metal frame 100, and the release film of the protective film tape is wound up.

[0102] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A robot three-border automatic film sticking device, characterized in that: It comprises a film pasting jig (1), a robot (2) and a film pasting device (3); At least two of the film sticking jigs (1) are provided, and two adjacent film sticking jigs (1) are spaced apart and arranged perpendicular to each other. Each of the film sticking jigs (1) is provided with an operating edge (11) for fixing the metal frame (100), and at least two of the operating edges (11) and the interval between two adjacent film sticking jigs (1) are connected to form a film sticking operation line (200); The robot (2) drives the film sticking device (3) to move; The film sticking device (3) is used to convey the protective film tape and recover the release film of the protective film tape; The robot (2) drives the film pasting device (3) to approach the working edge (11) and move along the film pasting working line (200), and the film pasting device (3) applies a protective film to the appearance surface of the metal frame (100) fixed to the working edge (11).

2. The automatic film pasting device for the three-sided frame of a robot according to claim 1, characterized in that: The film sticking jig (1) comprises a fixing plate (12) and a fixing clamp (13); The working edge (11) is arranged at the edge of the fixing plate (12), the working edge (11) is in a convex shape, and the metal frame (100) is placed on the working edge (11); There are a plurality of fixing clamps (13), and the plurality of fixing clamps (13) are arranged along the inner side of the working edge (11).

3. The automatic film pasting device for the three-side frames of a robot according to claim 2, characterized in that: The fixing fixture (13) comprises a first driver (131), a second driver (132) and a pressing member (133); The fixing plate (12) is provided with a plurality of fixing cavities (120) along the inner side of the working edge (11), the first driver (131) is fixed in the fixing cavity (120), and the first driver (131) drives the second driver (132) to extend and retract in the fixing cavity (120); The second driver (132) drives the holding member (133) to move closer to or farther away from the working edge (11).

4. The automatic film pasting device for the three-side frame of a robot according to claim 2, characterized in that: A plurality of limit blocks (14) are arranged on both sides of the working edge (11); the plurality of limit blocks (14) are fixed to the edge of the fixing plate (12); and a limit groove is formed between two limit blocks (14).

5. The automatic film pasting device for the three-sided frame of a robot according to claim 2, wherein: The fixing plate (12) is provided with a support member (121), the support member (121) is arranged at the bottom of the fixing plate (12), and both ends of the support member (121) are provided with a yielding portion (122).

6. The automatic film laminating device for the three-side frames of a robot according to claim 1, wherein: The manipulator (2) comprises a fixing platform (21), a manipulator body (22) and a mounting platform (23); The fixing platform (21) is arranged on one side of the film sticking fixture; The robot body (22) is arranged on the top of the fixed platform (21); The mounting platform (23) is arranged at the end of the robot body (22) and is used to fix the film sticking device (3); the film sticking device (3) moves along with the movement of the mounting platform (23).

7. The automatic film - sticking device for the three - side frames of a robot according to claim 1, wherein: The film laminating device (3) comprises a fixed plate (31), a material collection and release plate (32), a film laminating head (33), a third driver (34), a pressure wheel (35), a fourth driver (36), a cutter (37) and a fifth driver (38); The fixed disk (31) is fixed to the manipulator (2); The material feeding and discharging disk (32) is rotatably arranged on the fixed disk (31) and is used for conveying the protective film tape and winding up the release film of the protective film tape; One end of the film pasting head (33) is hinged to the fixed disk (31). One end of the third driver (34) is fixed to the fixed disk (31), and the other end of the third driver (34) is hinged to the film pasting head (33) and drives the film pasting head (33) to approach or move away from the working edge (11) at the end far from the fixed disk (31); The pressing wheel (35) is arranged on one side of the film pasting head (33) and is used for pressing the protective film tape against the appearance surface of the metal frame (100); The fourth driver (36) is fixed to the fixed disk (31) and drives the pressing wheel (35) to approach or move away from the working edge (11); The cutting knife (37) is arranged between the pressing wheel (35) and the film pasting head (33) and is used for cutting off the protective film tape; The fifth driver (38) is fixed to the fixed disk (31) and is used for driving the cutting knife (37) to perform telescopic movement so that the cutting knife (37) cuts off the protective film tape.

8. A three-border automatic film pasting device for a robot according to claim 7, characterized in that: The material feeding and discharging disk (32) includes a main disk (321) and a sub-disk (322); The main disk (321) is rotatably arranged on the fixed disk (31); The number of the sub-disks (322) is two, and the two sub-disks are respectively arranged on both sides of the fixed disk (31) and are used for conveying the protective film tape or winding up the release film of the protective film tape.

9. The automatic film pasting device for the three-sided frame of a robot according to claim 7, characterized in that: The film pasting head (33) includes a swing frame (331), a first guide wheel (332), a separating rod (333), a second guide wheel (334), a guide block (335) and a steering rod (336); One end of the swing frame (331) is hinged to the fixed disk (31), and the middle part of the swing frame (331) is hinged to the third driver (34); The first guide wheel (332) is arranged at the end of the swing frame (331) hinged to the fixed disk (31); Both the separating rod (333) and the second guide wheel (334) are arranged at the end of the swing frame (331) far from the end of the swing frame (331) hinged to the fixed disk (31); The guide block (335) is fixed to the fixed disk (31), and there is a tape guiding gap between the guide block (335) and the second guide wheel (334); The steering rod (336) is fixed to the fixed disk (31) and is located above the first guide wheel (332).

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