Blank pressing mechanism for shoemaking machine

Abstract

The invention relates to the technical field of shoemaking equipment, in particular to an edge pressing mechanism for a shoemaking machine, which comprises a table, a sewing base and a machine table are mounted on the table, a mounting plate is fixedly arranged at the bottom of the table, a transmission mechanism is fixedly arranged on the mounting plate, a mounting block is fixedly arranged at the bottom of the machine table, and a connecting seat is fixedly arranged on the mounting block. One side of the connecting base is provided with a pressing wheel assembly located over the transmission mechanism, the other side of the connecting base is rotationally connected with an upper feeding wheel, a lower feeding wheel rotationally connected to the inner side of the sewing base is arranged under the upper feeding wheel, and the bottom of the machine table is further provided with a shoe material edge detection assembly; according to the edge pressing mechanism for the shoemaking machine, when the edge of leather turns, the movement speed of the synchronous belt on one side is changed, so that a speed difference is generated between the synchronous belt and the upper feeding wheel, the leather turns towards one side, automatic turning of leather edge sewing is achieved, the regularity of sewing threads and the edge of the leather can be improved, and the attractiveness of shoe material products is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of shoe-making equipment, in particular to an edge pressing mechanism for a shoe-making machine. Background Art

[0002] In the process of sewing the upper of the shoe, a roller sewing machine is often used for sewing. The roller sewing machine is a special sewing machine, which is mainly used for sewing medium and thick materials, such as shoes, leather, bags, etc. Its working principle is to use rollers to drive the needle of the sewing machine, so as to make the sewing process smoother. Compared with the traditional flat-bottom sewing machine, the roller sewing machine has the characteristics of faster sewing speed, lower noise and smoother stitching. When sewing the upper of the existing roller sewing machine, since most of the uppers have arc angles, it is necessary to manually change the direction of the leather during sewing to adapt to the sewing of the edge of the leather, but manual turning can easily cause the stitches and the edge of the leather to be uneven, affecting the aesthetics of the subsequent shoe product. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a press edge mechanism for a shoemaking machine, which solves the technical problem that the seam line and the edge of the leather material are not neat in the manual turning seam of the existing roller machine.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a pressing mechanism for a shoemaking machine, comprising a table, a sewing base and a machine table are installed on the table, a mounting plate is fixedly provided at the bottom of the table, a transmission mechanism is fixedly provided on the mounting plate, a mounting block is fixedly provided at the bottom of the machine table, a connecting seat is fixedly provided on the mounting block, a pressing wheel assembly is provided on one side of the connecting seat and is located directly above the transmission mechanism, an upper feeding wheel is rotatably connected to the other side of the connecting seat, a lower feeding wheel rotatably connected to the inner side of the sewing base is provided directly below the upper feeding wheel, and a shoe material edge detection assembly is also installed at the bottom of the machine table;

[0005] The transmission mechanism includes a servo motor fixedly mounted on the side wall of the mounting plate, a synchronous wheel 1 is fixedly mounted on the output shaft of the servo motor, the synchronous wheel 1 is transmission-connected to the synchronous wheel 2, a plurality of guide wheels and a tensioning assembly through a synchronous belt, the synchronous wheel 2, a plurality of guide wheels and the tensioning assembly are all rotatably mounted on the side wall of the mounting plate, the top of the synchronous belt passes through the table and slides on the surface of the sewing base, and is located directly below the pressure wheel assembly.

[0006] Preferably, the tensioning assembly includes an adjusting screw rotatably connected to the side wall of the mounting plate, a slider is spirally connected to the outer wall of the adjusting screw, the slider is slidably arranged in a sliding hole opened on the side wall of the mounting plate, and a tensioning wheel is rotatably connected to the slider.

[0007] Preferably, the pressure wheel assembly includes a connecting block fixed to the side wall of the mounting block, the connecting block is elastically connected to one end of the pressure arm through a tension spring, the middle part of the pressure arm is rotatably connected to the connecting block through a rotating shaft, and the other end of the pressure arm is rotatably connected to a pressure wheel, which is inclined and directly above the synchronous belt.

[0008] Preferably, a groove is provided on the top of the sewing base, a support column is fixed in the groove, and the support column is located below the pressure wheel and the synchronous belt.

[0009] Preferably, both side walls of the sewing base are fixedly provided with limiting grooves, and the synchronous belt is slidably arranged in the limiting grooves.

[0010] Preferably, the shoe material edge detection component includes a cursor detector installed at the bottom of the machine, and a plurality of optical fiber lines are connected to the cursor detector. The plurality of optical fiber lines are inserted into and fixed in a steel pipe bracket, and the steel pipe bracket is connected to the bottom of the machine. The ends of the plurality of optical fiber lines are located in front of the side of the needle away from the upper feeding wheel.

[0011] Preferably, there are at least eight optical fiber lines, and the ends of the eight optical fiber lines are optical fiber transmitting end 1, optical fiber receiving end 1, optical fiber transmitting end 2, optical fiber receiving end 2, optical fiber transmitting end 3, optical fiber receiving end 3, optical fiber transmitting end 4 and optical fiber receiving end 4, respectively. Optical fiber transmitting end 1, optical fiber receiving end 1, optical fiber transmitting end 2 and optical fiber receiving end 2 are symmetrically arranged, and optical fiber transmitting end 3, optical fiber receiving end 3, optical fiber transmitting end 4 and optical fiber receiving end 4 are inclined.

[0012] Preferably, a PLC controller electrically connected to the cursor detector and the servo motor is also installed on the table.

[0013] By means of the above technical solution, the present invention provides a press edge mechanism for a shoemaking machine, which has at least the following beneficial effects:

[0014] 1. The edge pressing mechanism of the shoe-making machine is provided with a transmission mechanism and a pressing wheel assembly, and is driven by a servo motor and moves the synchronous belt under the action of the synchronous wheel one and the synchronous wheel two. At the same time, under the action of the pressing wheel assembly, the pressing wheel assembly presses the leather material on the synchronous belt, so that the leather material moves forward under the action of the upper feeding wheel and the synchronous belt. During the sewing process, when the edge of the leather material turns, the movement speed of the synchronous belt on one side is changed, so that a speed difference is generated between the synchronous belt and the upper feeding wheel, so that the leather material turns to one side, realizing the automatic turning of the leather edge sewing, which can improve the neatness of the seam and the edge of the leather material and ensure the beauty of the shoe material products.

[0015] 2. The edge pressing mechanism of the shoemaking machine can realize real-time detection of the turning of the leather edge by setting a shoe material edge detection component under the action of a cursor detector and multiple optical fiber lines, providing a signal basis for the subsequent automatic turning and edge pressing of the shoe material.

[0016] 3. The edge pressing mechanism of the shoe-making machine is provided with a tensioning assembly, and the slider is moved by using an adjusting screw, and the slider drives the tensioning wheel to move, thereby achieving tensioning of the synchronous belt and ensuring that the synchronous belt can move stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the bottom of the table of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the transmission mechanism of the present invention;

[0021] Figure 4 This is a schematic structural diagram of the back side of the mounting plate of the present invention;

[0022] Figure 5 It is a partially enlarged structural schematic diagram of the tensioning assembly of the present invention;

[0023] Figure 6 It is a structural schematic diagram of a part of the position between the sewing base and the machine table of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the cross-section and arrangement positions of the end portions of multiple optical fiber lines of the present invention;

[0025] Reference numerals:

[0026] 1. Table; 2. Sewing base; 3. Mounting plate; 4. Transmission mechanism; 401. Servo motor; 402. Synchronous wheel 1; 403. Synchronous wheel 2; 404. Guide wheel; 405. Tensioning assembly; 4051. Adjusting screw; 4052. Slider; 4053. Tensioning wheel; 406. Synchronous belt; 5. Machine; 6. Mounting block; 7. Connecting seat; 8. Pressing wheel assembly; 801. Tension spring; 802. Pressing arm; 803. Connecting block; 804. Pressing wheel; 9. Upper feeding wheel; 10. Lower feeding wheel Wheel; 11. Limiting groove; 12. Support column; 13. Shoe material edge detection component; 1301. Cursor detector; 1302. Optical fiber line; 13021. Optical fiber transmitting end one; 13022. Optical fiber receiving end one; 13023. Optical fiber transmitting end two; 13024. Optical fiber receiving end two; 13025. Optical fiber receiving end three; 13026. Optical fiber transmitting end three; 13027. Optical fiber receiving end four; 13028. Optical fiber transmitting end four; 1303. Steel pipe bracket; 14. PLC controller. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Roller sewing machines usually have functions such as automatic presser foot lift and automatic thread trimmer, which can easily achieve needle control and exquisite stitches. It has the advantages of simple operation and easy maintenance, so it is favored by beginners. It is suitable for various types of shoes, such as riding boots, sports shoes, work shoes, casual shoes, etc. Roller sewing machines also have a high-speed integrated direct drive design, with a compact overall structure, safe and reliable, suitable for sewing needs of various arc angles.

[0029] Embodiment 1:

[0030] Based on the technical defects of the existing manual turning seam, the seam line and the leather edge are not neat, please refer to Figure 1-Figure 7 The present invention provides a shoemaking machine edge pressing mechanism. When the edge of the leather material turns, the movement speed of the synchronous belt 406 on one side is changed, so that a speed difference is generated between the synchronous belt 406 and the upper feeding wheel 9, so that the leather material turns to one side, and the automatic turning of the leather material edge sewing is realized. The mechanism includes a table 1, a sewing base 2 and a machine table 5 are installed on the table 1, a mounting plate 3 is fixedly provided at the bottom of the table 1, a transmission mechanism 4 is fixedly provided on the mounting plate 3, a mounting block 6 is fixedly provided at the bottom of the machine table 5, and a mounting block 6 is installed on the mounting block 6. A connecting seat 7 is fixedly provided, and a pressure wheel assembly 8 is provided on one side of the connecting seat 7 and is located directly above the transmission mechanism 4. An upper feeding wheel 9 is rotatably connected to the other side of the connecting seat 7. A lower feeding wheel 10 rotatably connected to the inner side of the sewing base 2 is provided directly below the upper feeding wheel 9. A shoe material edge detection assembly 13 is also installed at the bottom of the machine table 5. When sewing, the leather material is on the sewing base 2, and then the leather material is moved under the drive of the transmission mechanism 4 and the upper feeding wheel 9. While moving, the needle can sew the leather material.

[0031] To solve the problem of uneven stitching and leather edges caused by the existing roller machine turning the leather manually, please refer to Figure 3 and Figure 6The transmission mechanism 4 includes a servo motor 401 fixed on the side wall of the mounting plate 3, a synchronous wheel 1 402 is fixed on the output shaft of the servo motor 401, and the synchronous wheel 1 402 is connected to the synchronous wheel 2 403, a plurality of guide wheels 404 and a tensioning assembly 405 through a synchronous belt 406. The synchronous wheel 2 403, a plurality of guide wheels 404 and the tensioning assembly 405 are all rotatably arranged on the side wall of the mounting plate 3. The top of the synchronous belt 406 passes through the table 1 and slides on the surface of the sewing base 2, and is located directly below the pressure wheel assembly 8; using the servo motor 4 01 drives the synchronous wheel 402 to rotate. Under the drive of the synchronous wheel 402, the synchronous belt 406 can move along the synchronous wheel 403, multiple guide wheels 404 and the tensioning assembly 405. At this time, the leather can move under the joint action of the synchronous belt and the upper feeding wheel 9. When facing the turning of the edge of the leather, the speed of the servo motor 401 is changed, thereby changing the speed of the synchronous belt 406. In this way, a speed difference will be generated between the synchronous belt 406 and the upper feeding wheel 9, and the leather will deviate to one side under the action of the speed difference, thereby forming an automatic turning effect.

[0032] When the synchronous belt 406 is not tensioned enough, the synchronous belt 406 is relatively loose, which may cause the synchronous belt 406 to slip and disengage from the synchronous wheel 1 402, affecting the movement stability of the synchronous belt 406. To solve the problem of slipping and instability caused by insufficient tension of the synchronous belt 406 during movement, please refer to Figure 5 The tensioning assembly 405 includes an adjusting screw 4051 rotatably connected to the side wall of the mounting plate 3, a slider 4052 is spirally connected to the outer wall of the adjusting screw 4051, the slider 4052 is slidably set in a sliding hole opened on the side wall of the mounting plate 3, and a tensioning wheel 4053 is rotatably connected to the slider 4052; the adjusting screw 4051 is used to move the slider 4052, and the slider 4052 drives the tensioning wheel 4053 to move, thereby realizing the tensioning of the synchronous belt 406, ensuring that the synchronous belt 406 can move stably.

[0033] When the leather material moves on the synchronous belt 406 and the upper feeding wheel 9, the synchronous belt 406 and the leather material cannot be stably contacted. To solve the problem of stable contact between the leather material and the synchronous belt 406, please refer to Figure 6The pressure wheel assembly 8 includes a connecting block 803 fixedly connected to the side wall of the mounting block 6, the connecting block 803 is elastically connected to one end of a pressure arm 802 through a tension spring 801, the middle part of the pressure arm 802 is rotatably connected to the connecting block 803 through a rotating shaft, and the other end of the pressure arm 802 is rotatably connected to a pressure wheel 804, which is inclined and is directly above the synchronous belt 406; under the action of the tension spring 801, the pressure wheel 804 can press the leather material tightly against the synchronous belt 406 through the pressure arm 802, so as to ensure that the leather material is in stable contact with the synchronous belt 406, and there will be no problem of leather material sliding, so that when the leather material turns automatically later, the turning angle can also be accurate.

[0034] Since the material of the synchronous belt 406 is relatively soft, when the pressure wheel 804 presses on the synchronous belt 406, it is easy to cause the synchronous belt 406 to bend downward, thereby affecting the flatness of the leather when sewing. To solve this problem, please refer to Figure 6 A groove is provided at the top of the sewing base 2, and a support column 12 is fixed in the groove. The support column 12 is located below the pressure wheel 804 and the synchronous belt 406; the support column 12 is used to support the bottom of the synchronous belt 406, so that when the pressure wheel 804 presses on the synchronous belt 406, the synchronous belt 406 will not bend downward and deform.

[0035] When the synchronous belt 406 moves on the sewing base 2, since the surface of the sewing base 2 is relatively smooth, the synchronous belt 406 is easy to slip off the sewing base 2, thereby affecting the movement of the synchronous belt 406. To solve this problem, limiting grooves 11 are fixedly provided on the two side walls of the sewing base 2, and the synchronous belt 406 is slidably set in the limiting grooves 11; the limiting grooves 11 are used to limit the synchronous belt 406, thereby preventing the synchronous belt 406 from slipping off the sewing base 2.

[0036] Embodiment 2:

[0037] When facing the automatic turning sewing of the leather edge, it is necessary to first detect the turning of the leather edge, and change the speed of the servo motor 401 based on the detection information, so as to achieve the purpose of automatic turning adjustment. To achieve this purpose, please refer to Figure 6 The shoe material edge detection component 13 includes a cursor detector 1301 installed at the bottom of the machine 5, and a plurality of optical fiber lines 1302 are connected to the cursor detector 1301. The plurality of optical fiber lines 1302 are inserted into and fixed in a steel pipe bracket 1303. The steel pipe bracket 1303 is connected to the bottom of the machine 5, and the ends of the plurality of optical fiber lines 1302 are located in front of the needle away from the upper feeding wheel 9.

[0038] Since the edge of the shoe material has two types of turns: inner arc and outer arc, automatic detection of the leather material turns must be achieved in both cases. To achieve this goal, please refer to Figure 7There are at least eight optical fiber lines 1302, and the ends of the eight optical fiber lines 1302 are optical fiber transmitting end 1 13021, optical fiber receiving end 1 13022, optical fiber transmitting end 2 13023, optical fiber receiving end 2 13024, optical fiber transmitting end 3 13026, optical fiber receiving end 3 13025, optical fiber transmitting end 4 13028 and optical fiber receiving end 4 13027. The optical fiber transmitting end 1 13021, optical fiber receiving end 1 13022, optical fiber transmitting end 2 13023 and optical fiber receiving end 2 13024 are symmetrically arranged. The transmitting end three 13026, the optical fiber receiving end three 13025, the optical fiber transmitting end four 13028 and the optical fiber receiving end four 13027 are arranged tilted; the optical fiber transmitting end one 13021, the optical fiber receiving end one 13022, the optical fiber transmitting end two 13023 and the optical fiber receiving end two 13024 are mainly used to provide auxiliary signals for detecting the inner and outer sharp turns of the edge of the shoe material. Here, the working process of the optical fiber transmitting end three 13026, the optical fiber receiving end three 13025, the optical fiber transmitting end four 13028 and the optical fiber receiving end four 13027 is mainly introduced: Figure 7 As shown, during operation, the edge of the shoe material is roughly aligned with the dotted line between the optical fiber receiving end three 13025 and the optical fiber receiving end four 13027 (the dotted line is in Figure 6), when in contact with it, the optical fiber receiving end four 13027 is covered by the edge shoe material and cannot receive the light signal reflected by the optical fiber transmitting end four 13028. At this time, the optical fiber amplifier has no signal output. Since the optical fiber transmitting end three 13026 and the optical fiber receiving end three 13025 are both outside the edge of the shoe material, the optical fiber receiving end three 13025 can receive the reflected light signal of the optical fiber transmitting end three 13026. At this time, the corresponding optical fiber amplifier has a signal output. At this time, the two optical fiber amplifiers corresponding to the optical fiber transmitting end three 13026, the optical fiber receiving end three 13025, the optical fiber transmitting end four 13028 and the optical fiber receiving end four 13027 input the signals (0 and 1) to the two input ends of the PLC controller 14 (generally, the high level is 24V set to 1 and the low level 0V is set to 0). At this time, the PLC controller 14 outputs the synchronous belt 406 driven by the servo motor 401 and the roller conveyor The material wheel 9 forms a relative pulse frequency signal with the same linear speed on the shoe material. At this time, the shoe material runs in a straight line on the sewing base 2. When the edge of the shoe material turns in an inner arc during operation, the optical fiber receiving end four 13027, the optical fiber transmitting end four 13028 and the optical fiber receiving end three 13025, and the optical fiber transmitting end three 13026 (the receiving ends of these two groups of optical fibers) will be completely covered at the edge. The optical fiber receiving end three 13025 and the optical fiber receiving end four 13027 cannot receive any optical signal. At this time, the corresponding two optical fiber amplifiers have no electrical signal output. At this time, the two input end signals of the PLC controller 14 are (0 and 0). The synchronous belt 406 driven by the servo motor 401 of the PLC controller 14 forms a linear speed greater than the action of the upper feeding wheel 9 on the shoe material. At this time, the edge of the shoe material returns to the vicinity of the dotted line during the sewing process. After this action is repeated several times, the equipment completes the inner arc turning process. On the contrary, during operation, when the shoe material edge detector encounters an outer arc turn, the optical fiber receiving end four 13027, the optical fiber transmitting end four 13028 and the optical fiber receiving end three 13025, and the optical fiber transmitting end three 13026 will all be suspended on the outer edge of the shoe material. At this time, the optical fiber receiving end four 13027 and the optical fiber receiving end three 13025 can receive the optical signals emitted by the optical fiber transmitting end four 13028 and the optical fiber transmitting end three 13026. At this time, the signals output by the two optical fiber amplifiers to the two input ends of the PLC controller 14 are (1 and 1). The PLC controller 14 drives the synchronous belt 406 through the servo motor 401 to form a linear speed less than the upper feeding wheel 9 acting on the shoe material. At this time, the edge of the shoe material returns to the vicinity of the dotted line during the sewing process. After this action is repeated several times, the equipment completes the outer arc turning process of the shoe material edge.

[0039] In order to solve the problem of feedback control of the speed of the servo motor 401 , a PLC controller 14 electrically connected to the cursor detector 1301 and the servo motor 401 is also installed on the table 1 .

[0040] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressing mechanism for a shoemaking machine, comprising a table (1), on which a sewing base (2) and a machine table (5) are mounted, characterized in that: The bottom of the table (1) is fixedly provided with a mounting plate (3), a transmission mechanism (4) is fixedly provided on the mounting plate (3), a mounting block (6) is fixedly provided on the bottom of the machine (5), a connecting seat (7) is fixedly provided on the mounting block (6), a pressure wheel assembly (8) located directly above the transmission mechanism (4) is provided on one side of the connecting seat (7), an upper feeding wheel (9) is rotatably connected to the other side of the connecting seat (7), a lower feeding wheel (10) rotatably connected to the inner side of the sewing base (2) is provided directly below the upper feeding wheel (9), and a shoe material edge detection assembly (13) is also installed at the bottom of the machine (5); The transmission mechanism (4) comprises a servo motor (401) fixedly mounted on the side wall of the mounting plate (3); a synchronous wheel 1 (402) is fixedly mounted on the output shaft of the servo motor (401); the synchronous wheel 1 (402) is transmission-connected to a synchronous wheel 2 (403), a plurality of guide wheels (404) and a tensioning assembly (405) via a synchronous belt (406); the synchronous wheel 2 (403), the plurality of guide wheels (404) and the tensioning assembly (405) are all rotatably mounted on the side wall of the mounting plate (3); the top of the synchronous belt (406) passes through the table (1) and slides on the surface of the sewing base (2), and is located directly below the pressure wheel assembly (8).

2. The edge pressing mechanism for a shoemaking machine according to claim 1, characterized in that: The tensioning assembly (405) comprises an adjusting screw (4051) rotatably connected to the side wall of the mounting plate (3); a slider (4052) is spirally connected to the outer wall of the adjusting screw (4051); the slider (4052) is slidably arranged in a sliding hole provided on the side wall of the mounting plate (3); and a tensioning wheel (4053) is rotatably connected to the slider (4052).

3. The edge pressing mechanism for a shoemaking machine according to claim 1, characterized in that: The pressure wheel assembly (8) includes a connecting block (803) fixedly connected to the side wall of the mounting block (6); the connecting block (803) is elastically connected to one end of a pressure arm (802) via a tension spring (801); the middle part of the pressure arm (802) is rotatably connected to the connecting block (803) via a rotating shaft; a pressure wheel (804) is rotatably connected to the other end of the pressure arm (802); the pressure wheel (804) is inclined and is located directly above the synchronous belt (406).

4. The edge pressing mechanism for a shoemaking machine according to claim 3, characterized in that: The top of the sewing base (2) is provided with a groove, in which a support column (12) is fixedly arranged, and the support column (12) is located below the pressure wheel (804) and the synchronous belt (406).

5. The edge pressing mechanism for a shoemaking machine according to claim 1, characterized in that: Limiting grooves (11) are fixedly provided on both side walls of the sewing base (2), and the synchronous belt (406) is slidably arranged in the limiting grooves (11).

6. The edge pressing mechanism for a shoemaking machine according to claim 1, characterized in that: The shoe material edge detection component (13) comprises a cursor detector (1301) installed at the bottom of the machine (5), and a plurality of optical fiber lines (1302) are connected to the cursor detector (1301). The plurality of optical fiber lines (1302) are inserted into and fixed in a steel pipe bracket (1303). The steel pipe bracket (1303) is connected to the bottom of the machine (5), and the ends of the plurality of optical fiber lines (1302) are located in front of the needle head on the side away from the upper feeding wheel (9).

7. The edge pressing mechanism for a shoemaking machine according to claim 6, characterized in that: There are at least eight optical fiber lines (1302), and the ends of the eight optical fiber lines (1302) are respectively an optical fiber transmitting end 1 (13021), an optical fiber receiving end 1 (13022), an optical fiber transmitting end 2 (13023), an optical fiber receiving end 2 (13024), an optical fiber transmitting end 3 (13026), an optical fiber receiving end 3 (13025), an optical fiber transmitting end 4 (13028) and an optical fiber receiving end 4 (13027); the optical fiber transmitting end 1 (13021), the optical fiber receiving end 1 (13022), the optical fiber transmitting end 2 (13023) and the optical fiber receiving end 2 (13024) are symmetrically arranged, and the optical fiber transmitting end 3 (13026), the optical fiber receiving end 3 (13025), the optical fiber transmitting end 4 (13028) and the optical fiber receiving end 4 (13027) are inclinedly arranged.

8. The edge pressing mechanism for a shoemaking machine according to claim 6, characterized in that: The table (1) is also equipped with a PLC controller (14) electrically connected to the cursor detector (1301) and the servo motor (401).

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