Sole sewing machine

Abstract

The utility model provides a sole sewing machine which comprises a working wheel and a pressing wheel. Materials to be sewn are pressed between the working wheel and the pressing wheel through the pressing wheel, and the pressing wheel is pressed normally during working. The shoe sole sewing machine further comprises a foot rest which is used for controlling the lifting amplitude of the pressing wheel through a manual arm lifting assembly, and the shoe sole sewing machine is characterized in that the foot rest extends out of the bottom of the shoe sole sewing machine. The foot rest of the shoe sole sewing machine is integrated on the shoe sole sewing machine and located at the bottom of the shoe sole sewing machine. Obviously, the shoe sole sewing machine is located in the preset opening of the table top when being installed on the table top, and is connected and fixed through the lug pieces. At the moment, the footrest naturally stretches out below the table top, namely, is located at a preset position below the table top. In this way, an opening for the connecting piece to pass through can be prevented from being additionally machined in the table top, meanwhile, it can be guaranteed that a mechanism above the table top is simple, and enough space is provided for operation.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a sole sewing machine, and specifically relates to a sole sewing machine. Background Art

[0002] The sole stitching machine is one of the main sewing equipment in the shoemaking process, which can be used for the wind stitching of the sole.

[0003] The sewing machine can also be used for sewing other thicker products. Due to the progress of miniaturization of electric drive, such as the widespread application of stepper motors, permanent magnet motors, etc., the sole sewing machine has also been miniaturized and can be integrated into the limited space on the work surface. When the sole sewing machine is working, the working wheel and the pressure wheel press the sewing material and feed it with the rotation of the working wheel. Obviously, in order to achieve stable and reliable feeding, the necessary pressing force between the pressure wheel and the working wheel is necessary. However, this also has an adverse effect, that is, due to the pressing effect, the material cannot easily change direction during the conveying process. Therefore, the pressure wheel of the sole sewing machine will be configured to be normally closed, but when temporarily released, the degree of release can be controlled by the operator. In the prior art, the operator sews on the table with both hands, and the control of the pressure wheel is generally achieved by the lower limbs. The common solution is to use the pedal as the switch for fully opening the pressure wheel for loading and unloading, and swing the knee left and right to drive the swing handle under the table to control the temporary release of the pressure wheel. Adjustable distance, that is, change the degree of compression, to facilitate the change of direction of the material.

[0004] When operating, the operator needs to use both hands to control the sewing of the materials on the table, so in the prior art, the lifting of the pressing wheel is mainly controlled by the operator's lower limbs. Specifically, a pedal is set near the bottom of the workbench, and the pressing wheel is fully lifted by stepping on the pedal. This is generally not done with more detailed amplitude control. The specific control operation of controlling the lifting amplitude of the pressing wheel can be achieved by a swing handle installed at the height of the operator's knees. The operator only needs to use his knees to swing left and right to control the swing handle to rotate a certain amplitude to control the lifting amplitude of the pressing wheel accordingly.

[0005] The connection between the swing handle and the sole stitching machine is generally achieved by connecting the swing handle below the table and the swing rod extending from the side of the sole stitching machine above the table through a connecting piece. The utility model patent with the publication number CN210596553U entitled "A thread cutting mechanism for a sole stitching machine" provides a similar sole stitching machine. Figure 2 However, the disadvantages of the same installation method are that the tabletop is modified to form an extra opening, there are protrusions on the side of the sole stitching machine, and there is a potential problem of interference with the operation of the moving parts, and the control handle is not attached to the sole stitching machine but installed on the work table, which is not conducive to the standardized integration of the sole stitching machine. Summary of the invention

[0006] The control link for controlling the lifting amplitude of the pressure wheel of the existing sole sewing machine is located outside the sole sewing machine, which will interfere with normal operation and requires additional openings to be processed on the table during installation. In order to solve this problem, the utility model provides a sole sewing machine.

[0007] The technical solution of the utility model provides a sole sewing machine. The sole sewing machine comprises a working wheel and a pressing wheel; the material to be sewn is pressed between the working wheel and the pressing wheel by the pressing wheel, and the pressing wheel is normally pressed when working; and the sole sewing machine further comprises a footrest, which is used to control the lifting amplitude of the pressing wheel through an artificial arm lifting assembly, and is characterized in that the footrest extends from the bottom of the lasting machine. Preferably, the footrest is detachably connected to the artificial arm lifting assembly at the bottom of the lasting machine.

[0008] Preferably, the footrest is detachably connected to the rocker arm of the artificial arm lifting assembly, a stopper is provided at one end where the footrest is connected to the rocker arm, the rocker arm has a channel for accommodating the footrest, a passage groove is provided in the circumferential position of the channel avoiding the footrest, and the passage groove avoids the circumferential position of the stopper when it is correctly installed in the circumferential direction of the channel.

[0009] Preferably, the peripheral surface of the footrest has a plane extending parallel to its axis, and after the footrest is rotated to a correct angle in the channel of the rocker, the plane is wedged by a fixing device on the rocker.

[0010] Preferably, the upper surface of the rocker arm has a concave positioning groove relative to the circumferential position of the footrest when it works normally, and after the footrest rotates to a correct angle in the channel of the rocker arm, the stopper falls into the positioning groove to limit the rotation and falling of the footrest.

[0011] Preferably, the pressing wheel is arranged on the guide assembly via a mounting arm, and a clamping assembly is connected in parallel with the guide assembly, and the clamping assembly enables the pressing wheel to be normally clamped.

[0012] Preferably, the manual arm lifting assembly includes an arm lifting handle, which is attached to the guide assembly or the automatic arm lifting assembly, and the arm lifting handle can transmit movement to the automatic arm lifting assembly or the guide assembly in one direction.

[0013] Preferably, the arm lifting handle is a lever structure that rotates around an axis, and one end of the arm lifting handle abuts against the internal transmission mechanism or guide assembly of the automatic arm lifting assembly.

[0014] Preferably, the arm lifting handle is a lever structure that rotates around an axis, and one end of the arm lifting handle abuts against the internal transmission mechanism or guide assembly of the automatic arm lifting assembly.

[0015] Preferably, the artificial arm lifting assembly also includes a swing rod, which has a swing direction consistent with the limb manipulation direction, and the swing rod is connected to the arm lifting handle by a connecting piece, and the connection transmits the movement between the arm lifting handle and the swing rod at least when under tension.

[0016] The footrest 53 of the sole sewing machine of the present invention is integrated on the sole sewing machine and is located at the bottom of the sole sewing machine. Obviously, when the sole sewing machine is installed on the table, it is located in the preset opening of the table and is connected and fixed by the ear piece. At this time, the footrest 53 naturally extends under the table, that is, it is located at the preset position under the table. This can avoid additional processing of the opening through the connecting piece on the table, and at the same time can ensure that the mechanism above the table is simple, providing sufficient space for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the prior art of the utility model;

[0018] Figure 2 A schematic diagram of the prior art of the utility model;

[0019] Figure 3 It is a schematic diagram of the mechanical principle of the arm lifting control of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the sole sewing machine of the utility model;

[0021] Figure 5 It is a schematic diagram of the transmission link of the arm lifting mechanism 1 of the utility model;

[0022] Figure 6 This is a schematic diagram of the installation of the footrest 53 of the utility model;

[0023] Figure 7 It is an enlarged schematic diagram of the installation part of the footrest 53 of the utility model;

[0024] Figure 8 It is a partial enlarged schematic diagram of another embodiment of the footrest 53 of the utility model;

[0025] Fig. 9 It is a working schematic diagram of the utility model.

[0026] In the figure,

[0027] 11: working wheel 12: pressing wheel 13: mounting arm 1: arm lifting mechanism 2: guide assembly 3: pressing assembly 31: spring 4: automatic arm lifting assembly 41: arm lifting drive member 42: concave area 43: electric control box 44: first drive member 45: swing arm 46: first connecting rod 47: first lever 5: manual arm lifting assembly 51: arm lifting handle 52: swing rod 521: elastic element 53: foot rest 531: stopper 522: passage groove 523: positioning groove W: sole DETAILED DESCRIPTION

[0028] The following is a detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. In this specification, the size ratios in the drawings do not represent the actual size ratios, but are only used to reflect the relative position relationship and connection relationship between the components. Components with the same name or the same number represent similar or identical structures and are only for illustrative purposes.

[0029] Figure 1 and Figure 2 It is a structural diagram of an existing sole sewing machine. Figure 2 yes Figure 1 A normal schematic diagram of local B along the viewing angle A in the middle. In short, the working area of ​​the sole sewing machine is located at local B, and has a rotatable working wheel 11 and a pressing wheel 12. The pressing wheel 12 shown in the figure is rotated with the movement. Specifically, during normal sewing, the material to be sewn extends along the direction in the figure, and is pressed between the working wheel 11 and the pressing wheel 12 by the pressing wheel 12. At this time, the working wheel 11 is driven, and the sewing material is advanced, and the pressing wheel 12 also rotates accordingly. When the sole sewing machine is turned on, it is in a normal sewing state most of the time, and occasionally it is necessary to release the pressing force or adjust the pressing force, such as changing parts or adjusting the sewing direction. Therefore, the pressing wheel 12 is generally set to a design mode of pressing in a permanent state and releasing the pressing force after intervention. The pressing wheel 12 is rotatably mounted on the mounting arm 13, and the pressing wheel 12 is released by moving the mounting arm 13 a certain distance to move the pressing wheel 12 away from the working wheel 11. The above means that the mounting arm 13 is movable. In the figure, the working surfaces of the pressure wheel 12 and the mounting arm 13 are parallel, and may be further arranged in the same plane. In this case, preferably, the mounting arm 13 moves along the radial direction of the working wheel 11 or parallel to the radial direction.

[0030] In the following, the release of the pressing wheel 12 is referred to as arm lifting (relative to the mounting arm 13) or wheel lifting (relative to the pressing wheel 12). In general, the sole sewing machine has an automatic arm lifting mode and a manual arm lifting mode. In the automatic arm lifting mode, after the operator outputs the operation instruction, the mounting arm 13 moves a set distance so that the pressing wheel 12 is away from the working wheel 11 by a set distance. Generally, this set distance can be the maximum stroke of the mounting arm 13, which can be applied to the loading and unloading operations of the material. In the manual arm lifting mode, as the intensity of the operation instruction changes, the moving distance of the mounting arm 13 also gradually changes, which means that a trained operator can control the body movements to make the pressing wheel 12 leave the working wheel 11 by the expected distance. The manual arm lifting mode is very necessary and can be used for bending stitches. At this time, the pressing wheel 12 is controlled to be appropriately away from the working wheel 11 to reduce the pressing force, which is convenient for adjusting the direction of the material to be sewn. At the same time, the pressing wheel 12 gives the material to be sewn enough pressing force so that it can still move forward stably under the drive of the working wheel 11.

[0031] Figure 3 A schematic diagram of the mechanical principle of the arm lifting control of the mounting arm 13 is given, which only provides a simplified principle diagram and does not represent the actual part structure and combination relationship. The mounting arm 13 is arranged on the guide assembly 2, and the clamping assembly 3 can be connected in parallel with the guide assembly 2. The clamping assembly 3 is normally tensioned or clamps the mounting arm 13 through other action modes. The automatic arm lifting assembly 4 and the manual arm lifting assembly 5 can respectively control the guide assembly 2 to overcome the movement of the clamping assembly 3 to realize the lifting of the mounting arm 13. In this regard, the internal structure of a sole sewing machine similar to the above principle has been disclosed in "A presser foot lifting mechanism for a sewing machine" with application number CN202311045131.7.

[0032] In the prior art, as disclosed in the invention patent application entitled "A Presser Foot Lifting Mechanism of a Sewing Machine" with the publication number CN117026525A published by the partners, in general, in the prior art, an arm lifting driver 41 is provided in the automatic arm lifting assembly 4, and the arm lifting driver 41 is connected to the guide assembly 2 through the concave area 42, and the initial restriction of the spring 31 is overcome by controlling the action of the arm lifting driver 41 so that the pressure wheel 12 is lifted as required. The arm lifting driver 41 can be an electromagnet, but preferably a motor assembly. The reason is that, generally speaking, in order to overcome the clamping force of the clamping assembly 3, the arm lifting driver 41 requires a larger driving force to open the mounting arm 13, which means that a larger driving current is required to achieve this. For the electromagnet, this means that a separate power supply and control circuit needs to be designed for the arm lifting driver 41 to ensure the reliable operation of the electromagnet. However, the use of motor control can basically avoid redesigning the circuit. The motor power supply and control circuit can usually be synchronously integrated with the drive circuit of the first drive member 44, etc., sharing some circuits and devices, and can reduce the current value of the arm lift drive member 41 when it is working, thereby providing more stable, reliable and accurate arm lift control. When using the motor assembly, products such as stepper motors can be used, so that the torque can be maintained after a certain angle of rotation under control. Obviously, the motor's rotation angle can be converted into linear movement through a swing arm or other means to act on the aforementioned guide assembly 2.

[0033] Figure 4 The figure is a schematic diagram of the internal structure of the arm lifting mechanism 1 when the arm lifting driving member 41 is placed on the side. The arm lifting driving member 41 is connected to the guide assembly 2 through a transmission mechanism. When it is controlled to move, the guide assembly 2 overcomes the clamping force of the clamping assembly 3 and lifts. Once the arm lifting driving member 41 is restored, the guide assembly 2 is reset. The manual arm lifting assembly 5 includes an arm lifting handle 51 for manual knee-lifting. The arm lifting handle 51 is connected to the guide assembly 2 through transmission. When it is controlled to move, the guide assembly 2 overcomes the clamping force of the clamping assembly 3 and moves a certain distance following the movement of the guide assembly 2. This realizes the fine control of the arm lifting distance by the arm lifting handle 51, and the arm lifting driving member 41 does not have this function. In order to realize that the automatic arm lifting assembly 4 and the manual arm lifting assembly 5 drive the guide assembly 2 independently of each other (independently means that when either the automatic arm lifting assembly 4 or the manual arm lifting assembly 5 drives the guide assembly 2, the position of the other one of the manual arm lifting assembly 5 and the automatic arm lifting assembly 4 is not affected), the transmission links of the automatic arm lifting assembly 4 driving the guide assembly 2 and the manual arm lifting assembly 5 driving the guide assembly 2 are both unidirectional, and can only be transmitted from the automatic arm lifting assembly 4 to the guide assembly 2 and from the manual arm lifting assembly 5 to the guide assembly 2. This is especially necessary when the arm lifting drive 41 is a motor. If the motion transmission is bidirectional, when the manual arm lifting assembly 5 drives the guide assembly 2, due to the presence of the positioning torque of the arm lifting drive 41, the arm lifting drive 41 may hinder the movement of the guide assembly 2.

[0034] Figure 4 A schematic diagram of the transmission link of the arm lifting mechanism 1 (upper right) and a schematic diagram of the transmission link of the manual arm lifting assembly 5 (lower right) are further provided. For the transmission link of the automatic arm lifting assembly 4, the figure is an example, and the swing arm 45 is connected to the output shaft of the arm lifting drive 41, or is connected to the output shaft that is connected to the arm lifting drive 41 through several transmission systems. The first lever 47 can rotate around the axis, one end of which is connected to the swing arm 45 via the first connecting rod 46, and the other end of which is connected to the guide assembly 2 via a connecting member. Once the swing arm 45 rotates, the movement of the guide assembly 2 can be achieved through the above-mentioned transmission system. Preferably, the first connecting rod 46 should be a one-way transmission motion, that is, only the arm lifting drive 41 is allowed to transmit power to the first lever 47, and cannot be transmitted in the reverse direction. Since in this embodiment, the first connecting rod 46 is pulled during the lifting process of the control mounting arm 13, it is necessary for the first connecting rod 46 to play a transmission role only when it is pulled, and not to transmit motion when it is compressed. In order to realize such movement of the first connecting rod 46, in this specific solution, the first connecting rod 46 can use a flexible connecting member, such as a soft rope, a steel string, a chain, a cable, etc. On the other hand, the technical solution in the figure can also be adopted, the first connecting rod 46 has a sliding pair composed of two slidingly connected rods, the two rods are respectively connected to the first lever 47 and the swing arm 45, under the lifting control, the two rods are in a stop position in a state of being away from each other, so under the lifting control, the two rods are relatively stationary at the stop position, so the first connecting rod 46 formed by them can transmit movement. On the contrary, in other cases, such as when the installation arm 13 is lifted and the arm lifting drive member 41 is not moved, the first lever 47 rotates to compress the rod of the first connecting rod 46, and the arm lifting drive member 41 is still stationary due to the existence of the holding torque. At this time, the two sliding rods of the first connecting rod 46 slide relatively close to each other to absorb the movement of the first lever 47. This design can properly realize the one-way transmission of the installation arm 13, which can play a key role described later when there is an artificial arm lifting assembly 5.

[0035] For the artificial arm lifting assembly 5, Figure 5 It is an isometric diagram of the other direction. It includes an arm lifting handle 51, which is attached to the guide assembly 2 or the automatic arm lifting assembly 4. The arm lifting handle 51 can transfer motion to the automatic arm lifting assembly 4 or the guide assembly 2 in one direction, and vice versa. The motion will not be transferred to the arm lifting handle 51. Figure 6The structure shown is a lever structure that rotates around an axis, or it can be set to other structures as needed. At this time, one end of the arm lifting handle 51 abuts against the internal transmission mechanism or guide assembly 2 of the automatic arm lifting assembly 4. Due to the abutment, power is transmitted only at the abutment point when the two contact members are relatively pressed, and no movement is transmitted when they are relatively far away, thereby realizing one-way control. By setting the appropriate abutment direction of the arm lifting handle 51 as shown in the figure, it can be ensured that the two contact members are relatively pressed when the installation arm 13 is manually lifted. If the arm lifting handle 51 is a lever member shown in the figure, the appropriate position of the lever can be used as the force application point, and the lever works after the force is applied. At the same time, the arm lifting handle 51 can also be a linear moving component such as a slider, and the arm lifting handle 51 can be pushed and pulled to lift the installation arm 13.

[0036] In most cases, the operating direction of the arm lifting handle 51 does not conform to the operator's operating posture. Figure 5 As shown in the figure, the operator faces the side where the working wheel 11 is located, and generally uses the knee to swing left and right to control the movement of the manual arm lifting assembly 5, that is, the EE direction shown in the figure, but the movement direction of the arm lifting handle 51 is in a vertical plane that is roughly perpendicular to this direction. Therefore, a corresponding swing rod 52 can be set. The swing direction of the swing rod 52 is consistent with the control direction, so it can be considered to be set to rotate on an axis perpendicular to the swing direction. The swing rod 52 and the arm lifting handle 51 are connected by a connecting rod. Depending on the movement of the mechanism, the connecting rod can be considered to be rotationally connected or hinged to the two. Generally, both ends of the connecting rod are hinged because of the need to change the movement direction. The connection points of the connecting rod on the arm lifting handle 51 and the swing rod 52 are eccentric relative to their respective rotation axes. The swing rod 52 can be provided with an elastic element 521 required for its automatic reset, and the elastic element 521 is, for example, a torsion spring coaxially arranged in the figure.

[0037] like Figure 6 As shown, a foot 53 can be provided on the swing rod 52 to extend the working point and working stroke of the swing rod 52. The foot 53 is usually detachably connected to the swing rod 52. For details, see Figure 7 and Figure 8 Various connection embodiments in FIG. Figure 6A partial enlarged schematic diagram. A stopper 531 is provided at one end of the support foot 53 for connecting with the rocker arm 52, and a passage slot 522 is opened in the slot or hole of the rocker arm 52 to accommodate the passage of the stopper 531. The circumferential position of the passage slot 522 along the slot or hole on the rocker arm 52 should avoid the circumferential position of the stopper 531 when the support foot 53 is correctly installed. Therefore, the stopper 531 can be rotated by a certain angle so that the stopper 531 is aligned with the passage slot 522, and then the support foot 53 is installed in the rocker arm 52. Then, the support foot 53 is rotated to the working position so that the stopper 531 and the passage slot 522 are circumferentially staggered. At this time, due to the stopping effect of the stopper 531, the support foot 53 can be suspended on the rocker arm 52 without accidentally falling. In order to keep the support foot 53 and the rocker arm 52 relatively fixed and prevent it from deflecting around the installation slot or hole when it pushes the rocker arm 52, it can be as follows Fig. 9 As shown, a threaded component is used to wedge the support foot 53 on the side of the mounting hole, and the peripheral surface of the support foot 53 that cooperates therewith may have a plane that cooperates with the threaded component to prevent the support foot 53 from rotating after being wedged. Figure 8 A further improved embodiment is provided. A concave positioning groove 523 is provided on the upper surface of the swing rod 52 in the circumferential direction relative to the normal working position of the footrest 53. After the footrest 53 passes through the swing rod 52 until the stopper 531 is exposed, the footrest 53 is rotated to the normal working direction to remove the force, the footrest 53 falls, and the stopper 531 naturally falls into the positioning groove 523, thereby limiting the rotation and falling of the electric control box 43, ensuring that the footrest 53 stays at the normal working angle and is relatively fixed.

[0038] Figure 8The figure is a schematic diagram of the overall installation of the sole sewing machine. The footrest 53 extends through the bottom end of the sole sewing machine. When the sole sewing machine is installed on the work surface, there are no redundant protrusions around the sole sewing machine in the work surface. On the one hand, the overall structure of the sole sewing machine can be made more compact, and more importantly, the problem of hooking materials and hindering the operation of the operator caused by the protrusions such as the footrest 53 can be avoided. For example, in the prior art, the swing rod 52 usually extends from the side of the sole sewing machine. In order to realize the use of knee control, a corresponding control handle needs to be set below the table, so it is necessary to set a connecting piece that penetrates between the upper and lower surfaces of the table, which can generally be achieved by connecting with a flexible rope or a flexible chain. Its disadvantages are that the table needs to be modified to form redundant openings, and there are protrusions on the side of the sole sewing machine and the potential problem of interference with the operation of the moving parts, and its control handle is not attached to the sole sewing machine, but is installed on the work surface, which is not conducive to the standardization of the sole sewing machine and the fine adjustment of the control handle. The improved technical solution can directly extend the footrest 53 from the bottom of the sole sewing machine without occupying the circumferential area of ​​the sole sewing machine, which is compact and simple and will not interfere with the operation. Since the footrest 53 is detachably connected, the footrest 53 will not occupy too much volume before installation, resulting in an increase in the overall size of the device, but after installation, it can be directly attached to the sole sewing machine, or even attached to the sole sewing machine from its bottom, thereby achieving quick and easy installation and docking.

[0039] Fig. 9 The figure is a schematic diagram of the working of the sole sewing machine of the utility model. The material to be sewn is usually a sole with a certain thickness. As shown in the figure, in order to complete the sewing operation, the sole needs to be pressed and circled between the working wheel 11 and the pressing wheel 12, which means that the sole of a certain length and width needs to be rotated 360 degrees at the head of the machine, requiring a larger operating surface. In the utility model, the footrest 53 extends from the bottom of the equipment and directly enters below the work surface. As shown in the figure, any moving component of the manual arm lift assembly 5 will not invade the working surface, so it will not interfere with the sewing materials such as the sole rotating during operation, affecting the operation or bringing potential safety risks.

[0040] The above content is only a description of the preferred implementation mode of the utility model, and does not limit the scope of the utility model. Without departing from the design spirit of the utility model, various modifications and improvements made to the technical solution of the utility model by ordinary technicians in this field should fall within the protection scope determined by the claims of the utility model.

Claims

1. A shoe sole sewing machine, comprising a working wheel (11) and a pressing wheel (12); the material to be sewn is pressed between the working wheel (11) and the pressing wheel (12) by the pressing wheel (12), and the pressing wheel (12) is normally pressed when working; and further comprising a footrest (53), wherein the footrest (53) is used to control the lifting amplitude of the pressing wheel (12) through an artificial arm lifting assembly (5), characterized in that: The supporting foot (53) extends from the bottom of the lasting machine.

2. The shoe sole stitching machine according to claim 1, characterized in that: The footrest (53) is detachably connected to the manual arm lifting assembly (5) at the bottom of the lasting machine.

3. The sole stitching machine according to claim 1, characterized in that: The footrest (53) is detachably connected to the swing rod (52) of the artificial arm lifting assembly (5); a stopper (531) is provided at one end of the footrest (53) connected to the swing rod (52); a channel for accommodating the footrest (53) is provided on the swing rod (52); a passage groove (522) is provided at a circumferential position of the channel avoiding the footrest (53); and the passage groove (522) avoids the circumferential position of the stopper (531) when it is correctly installed in the circumferential direction of the channel.

4. The sole stitching machine according to claim 3, characterized in that: The peripheral surface of the footrest (53) has a plane extending parallel to its axis. After the footrest (53) is rotated to a correct angle in the channel of the rocker (52), the plane is wedged by a fixing device on the rocker (52).

5. The shoe sole stitching machine according to claim 3, characterized in that: The upper surface of the swing rod (52) has a concave positioning groove (523) relative to the circumferential position of the footrest (53) when the footrest (53) is working normally. After the footrest (53) rotates to a correct angle in the channel of the swing rod (52), the stopper (531) falls into the positioning groove (523) to limit the rotation and falling of the footrest (53).

6. The sole stitching machine according to any one of claims 1 to 5, characterized in that: The pressing wheel (12) is arranged on the guide assembly (2) via a mounting arm (13), and a clamping assembly (3) is connected in parallel with the guide assembly (2), and the clamping assembly (3) enables the pressing wheel (12) to be normally clamped.

7. The sole stitching machine according to claim 6, characterized in that: The manual arm lifting assembly (5) comprises an arm lifting handle (51), which is attached to the guide assembly (2) or the automatic arm lifting assembly (4). The arm lifting handle (51) can transmit movement to the automatic arm lifting assembly (4) or the guide assembly (2) in one direction.

8. The shoe sole stitching machine according to claim 7, characterized in that: The arm lifting handle (51) is a lever structure that rotates around an axis, and one end of the arm lifting handle (51) abuts against an internal transmission mechanism or a guide assembly (2) of the automatic arm lifting assembly (4).

9. The shoe sole stitching machine according to claim 8, characterized in that: The artificial arm lifting assembly (5) also includes a swing rod (52), which has a swing direction consistent with the limb control direction, and the swing rod (52) is connected to the arm lifting handle (51) by a connecting piece, and the connection transmits the movement between the arm lifting handle (51) and the swing rod (52) at least when under tension.

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