A hem adjustment mechanism for a flat bed seaming machine

Abstract

The utility model discloses a kind of folding edge adjusting mechanism for platform type binding machine, including lifting cylinder, folding edge pressure piece and the workbench of installation in the frame body of platform type binding machine, first slider and locking mechanism for the positioning of first slider can be longitudinally slidably installed in the lower side of workbench;The cylinder body of lifting cylinder is installed on first slider, and the piston rod of lifting cylinder is connected folding edge pressure piece;Locking mechanism includes locking piece and locking plate arranged along transverse, locking plate is installed on the side wall of first slider, and locking piece is detachably installed on locking plate and frame body. First slider and lifting cylinder in the utility model are not split body setting, so as to reduce the space occupied by the utility model, and due to the setting of locking mechanism, first slider can be positioned when folding edge distance is not needed to be adjusted, to avoid the possibility of operator misoperation, ensure the folding edge effect of cloth.

Description

Technical Field

[0001] This utility model relates to textile processing equipment, and more specifically to a hem adjustment mechanism for a platform-type cover-sewing machine. Background Technology

[0002] Fabrics can be processed into various textile products such as clothes, towels, or quilts. In the processing of fabrics, it is often necessary to hem the edges of a piece of fabric. However, the existing processing methods generally use manual methods, which results in low processing efficiency and cannot meet the needs of enterprises for automation development.

[0003] Chinese patent application number "201921094750.4" discloses an automatic platform-type hem-rolling mechanism for fabric. The fabric is positioned in the hem-rolling gap formed by the upper and lower hem-rolling plates. The fabric is guided by the slanted edge of the lower hem-rolling plate and folded along the folded edge of the upper hem-rolling plate. Then, the fabric is blown open by the folded edge air blower to sew a rolled edge. However, since the hem-rolling gap is a fixed gap to ensure that the fabric can be folded, but the hem-rolling gap still exists after the fabric is folded, the folded edge air blower needs to blow continuously during the hem-rolling process to prevent the fabric from being misaligned or deformed. The blowing time is relatively long, and the hem-rolling effect of the fabric is still easily poor during the blowing process.

[0004] Based on this, someone designed a lifting and folding mechanism for a platform-type coverstitch machine, with the publication number CN 219586338 U. It uses a lifting cylinder and a folding pressure piece to cooperate with each other. A blowing area is formed between the folding pressure piece and the worktable. The fabric is folded under the action of airflow from each air outlet. After folding, the folded position of the fabric is pressed between the worktable and the folding pressure piece to ensure that the fabric will not be misaligned or deformed, thus ensuring the folding effect of the fabric. However, with the above-mentioned lifting and folding mechanism, the lifting cylinder of the folding pressure piece and the adjustment mechanism for adjusting the folding distance are two independent mechanisms, which occupy a large space. The adjustment mechanism can still be manually operated during use or when idle, which may lead to misoperation and thus deviation of the fabric folding.

[0005] In view of this, this application has conducted in-depth research on this basis, resulting in this case. Utility Model Content

[0006] The purpose of this invention is to provide a folding adjustment mechanism for a platform-type cover-sewing machine that occupies less space, which can avoid the possibility of manual misoperation in adjusting the folding spacing and ensure the folding effect of the fabric.

[0007] To achieve the above objectives, the solution of this utility model is:

[0008] A hem adjustment mechanism for a platform-type overlock sewing machine includes a lifting cylinder, a hem pressing member, and a worktable mounted on the frame of the platform-type overlock sewing machine. A first sliding member is mounted on the lower side of the worktable in a manner that allows it to slide longitudinally along the worktable, and a locking mechanism is used to position the first sliding member. The cylinder body of the lifting cylinder is directly or indirectly mounted on the first sliding member, and the piston rod of the lifting cylinder is connected to the hem pressing member. The locking mechanism includes a locking member and a locking plate arranged laterally. The locking plate is mounted on the side wall of the first sliding member, and the locking member is detachably mounted on the locking plate and the frame.

[0009] The first sliding member is indirectly slidably mounted on the lower side of the workbench via a first sliding structure. The first sliding structure includes a first slide rail and a first sliding block that are slidably engaged. A mounting plate arranged longitudinally is mounted on the frame. The first slide rail arranged longitudinally is mounted on the lower side of the mounting plate. The first sliding block is mounted on the upper side of the first sliding member.

[0010] The locking plate and the frame are respectively provided with corresponding mounting holes, and the locking element is provided in the two corresponding mounting holes.

[0011] The first sliding member and the first sliding structure together form a first sliding assembly for adjusting the folding distance of the folding pressure member. There are two sets of the first sliding assembly, and the two first sliding assemblies are arranged side by side. The lifting cylinder is respectively installed on the end of the first sliding member of the two first sliding assemblies away from the frame.

[0012] The locking plate is located between the two first sliding members, and the two ends of the locking plate are respectively installed on their respective adjacent first sliding members. Another locking plate is installed between the two mounting plates. The two locking plates are respectively provided with corresponding mounting holes, and the locking members are provided in the two corresponding mounting holes.

[0013] It also includes a second sliding member that is mounted on the first sliding member in a way that allows it to slide up and down. The upper end of the second sliding member is mounted on the folded edge pressing member, and the second sliding member is slidably mounted on the first sliding member through a second sliding structure; wherein, the cylinder body of the lifting cylinder is fixedly mounted on the locking plate.

[0014] The frame is indirectly mounted with a mounting base via the mounting plate. The mounting base and the locking plate are respectively provided with corresponding mounting holes, and the locking element is provided in the two corresponding mounting holes.

[0015] The second sliding member and the second sliding structure together form a second sliding assembly for driving the folding pressure member to rise and fall. There are two sets of the second sliding assembly, and the two sets of the second sliding assembly are arranged side by side. The two sets of the second sliding assembly share the same lifting cylinder, and the cylinder body of the lifting cylinder is installed in the middle position of the locking plate.

[0016] The locking plate is located between the two second sliding members, and the two ends of the locking plate are respectively installed on their respective adjacent first sliding members. The frame is indirectly installed with a mounting base through the mounting plate. The mounting base and the locking plate are respectively provided with corresponding mounting holes, and the locking member is provided in the two corresponding mounting holes.

[0017] The first slider is an L-shaped slider block.

[0018] After adopting the above structure, this utility model has the following beneficial effects: 1. By using the first sliding member, locking mechanism, and lifting cylinder, before using this utility model, the locking member is disassembled from the locking plate and frame in sequence, and then the first sliding member is pushed to move relative to the worktable to adjust the distance between the folding pressing member and the worktable, that is, to adjust the folding distance of the fabric. Then, the folding distance is fixed by installing the locking member to ensure that the first sliding member will not shift and affect the folding effect when this utility model is used. Then, when this utility model is used, a folding area is formed between the worktable surface and the folding pressing member, and then the fabric passes through the folding area. The gap enters the folding area. After the fabric is folded in the conventional way, the piston rod of the lifting cylinder is controlled to press the folded edge of the fabric to prevent deformation. Compared with the prior art, in this utility model, the first sliding member that drives the longitudinal sliding of the folding mechanism and the lifting cylinder that controls the lifting of the folding pressing member are not separate. They are integrated into the same mechanism, thus reducing the space occupied by this utility model and shrinking its volume. At the same time, due to the setting of the locking mechanism, the first sliding member can be positioned when there is no need to adjust the folding gap, thereby avoiding the possibility of operator misoperation and ensuring the folding effect of the fabric.

[0019] 2. By adopting the setting of the second sliding member, when the piston rod of the lifting cylinder rises and falls, the piston rod of the lifting cylinder drives the folding pressing member to rise and fall. During the rising and falling process of the folding pressing member, the second sliding member slides up and down along the first sliding member, thereby ensuring the stability of the folding pressing member during the rising and falling process.

[0020] 3. The arrangement of two sets of first sliding components and two sets of second sliding components ensures the stability of the longitudinal movement of the folding pressing component by allowing the two first sliding components to slide along the corresponding mounting plates during the longitudinal movement of the folding pressing component. When the folding pressing component is raised or lowered, the two second sliding components move up and down along the corresponding first sliding components to ensure the stability of the vertical movement of the folding pressing component. This further ensures that the folding pressing component will not shake or deviate during its operation, thereby ensuring the accuracy of the fabric folding. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0022] Figure 2 This is a schematic diagram of the structure of Example 2.

[0023] Figure 3 A schematic diagram of the structure for implementing the three-part structure.

[0024] Figure 4 This is a schematic diagram of the structure of Example 4.

[0025] Figure 5 This is a side view of Example 4.

[0026] Figure 6 This is a schematic diagram of the structure in Example 4, omitting the workbench and frame.

[0027] In the picture:

[0028] 100-Frame; 1-Workbench; 2-Lifting Cylinder; 21-Push Plate; 3-Folding Press;

[0029] 4-Locking mechanism; 41-Locking element; 42-Locking plate;

[0030] 5-First sliding member; 51-First slide rail; 52-First sliding block;

[0031] 61-Mounting plate; 63-Connecting block; 631-Strip hole; 64-Mounting base;

[0032] 7-Second sliding member; 71-Second slide rail; 72-Second sliding block. Detailed Implementation

[0033] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0034] Example 1

[0035] like Figure 1As shown, a folding adjustment mechanism for a platform-type coverstitch machine is an improvement on a conventional platform-type coverstitch machine. The platform-type coverstitch machine includes a frame 100 (only a portion of the frame is shown in the figure). The feeding mechanism of the platform-type coverstitch machine conveys the fabric. During the conveying process, the fabric is folded and the folded position is sewn by the coverstitch machine to form a rolled edge. In this embodiment, both the feeding mechanism and the sewing structure after the fabric is folded can be implemented using existing conventional technologies, so they will not be described in detail.

[0036] For ease of description, the orientation of this utility model during normal use is taken as the reference direction of this utility model, and the length direction of the workbench is taken as the horizontal direction, i.e. the front-to-back direction, and the width direction of the workbench is taken as the vertical direction, i.e. the left-to-right direction. The side of the sewing machine closest to the platform-type cover-up sewing machine is taken as the left side, and the other side is taken as the right side.

[0037] In this embodiment, the hem adjustment mechanism includes a worktable 1, a lifting cylinder 2, a hem pressing member 3, a locking mechanism 4, and a first sliding member 5. The worktable 1 is mounted on the frame 100 of the aforementioned platform-type overlock sewing machine. The first sliding member 5 is installed on the lower side of the worktable 1 in a manner that allows it to slide left and right. The cylinder body of the lifting cylinder 2 is directly or indirectly mounted on the first sliding member 5. The lifting cylinder 2 is arranged vertically, and the cylinder body of the lifting cylinder 2 is located on the lower side of the piston rod of the lifting cylinder 2. The piston rod of the lifting cylinder 2 is connected to the lower side of the hem pressing member 3. The locking mechanism 4 is used to position the first sliding member 5. The locking mechanism 4 includes a locking member 41 and a locking plate 42. The locking plate 42 is fixedly mounted on the front or rear side wall of the first sliding member 5, and the locking member 41 is detachably mounted on the locking plate 42 and the frame 100 so as to position the first sliding member 5 on the frame 100.

[0038] Specifically, the cylinder body of the aforementioned lifting cylinder 2 is fixedly installed on the left side of the first sliding member 5, and the first sliding member 5 is indirectly slidably installed on the lower side of the workbench 1 through the first sliding structure. More specifically, the frame 100 is fixedly installed with a mounting plate 61, which is arranged in the left-right direction. The frame 100 and the mounting plate 61 are installed using a conventional installation structure. For example, the left end of the mounting plate 61 has multiple through holes, which are arranged sequentially in the front-back direction. The lower side of the frame 100 has threaded holes corresponding to each through hole, with each through hole and threaded hole corresponding one-to-one. Bolts are screwed into each corresponding through hole and threaded hole, i.e., bolts are screwed into the through holes and threaded holes sequentially. The structure of the first sliding structure is as follows: Figure 5As shown, the first sliding structure includes a first slide rail 51 and a first sliding block 52 that are in sliding engagement. The sliding structure of the first sliding member 5 is as follows: the first slide rail 51 is fixedly installed on the lower side of the mounting plate 61, and the first slide rail 51 is arranged in the left-right direction. The first sliding block 52 is installed on the upper side of the first sliding member 5. In this way, the first sliding member 5 can slide to the left or right relative to the mounting plate 61 through the sliding engagement of the first slide rail 51 and the first sliding block 52.

[0039] As a preferred embodiment, the first sliding member 5 is an L-shaped sliding block with its vertical side on the left. The cylinder body of the lifting cylinder 2 is fixedly installed on the vertical side of the first sliding member 5, and a push plate 21 is fixedly installed on the free end of the piston rod of the lifting cylinder 2. The push plate 21 is fixedly installed on the lower side of the folding pressing member 3. The two can be installed in the existing conventional way. In this way, the first sliding member 5 slides along the left or right side, driving the lifting cylinder 2 to slide, thereby driving the folding pressing member 3 to slide. Preferably, a connecting plate 63 is installed on the vertical side of the first sliding member 5, and the cylinder body of the lifting cylinder 2 is fixedly installed on the left side of the connecting plate 63. The lifting cylinder 2 is arranged vertically. The connecting plate 63 has a strip hole 631, which is arranged vertically. The vertical side of the first sliding member 5 has an adjustment hole corresponding to the strip hole 631. The strip hole 631 and the adjustment hole are equipped with bolts. The bolts pass through the strip hole 631 and the adjustment hole in sequence to fix the connecting block 63 on the first sliding member 5. In this way, the lifting cylinder 2 can adjust the position of the connecting plate 63 relative to the first sliding member 5 to raise or lower the folding pressing member 3, that is, adjust the distance between the folding pressing member 3 and the table surface of the worktable 1.

[0040] Furthermore, in the above-mentioned locking mechanism, the locking plate 42 is fixedly installed on the left or right side wall of the first sliding member 5. Both are installed using existing conventional installation structures, which will not be elaborated here. The locking plate 42 is arranged in the front-back direction, and the locking plate 42 is provided with mounting holes. The frame 100 is also provided with mounting holes. The two mounting holes correspond to each other and are equipped with locking members 41. In this embodiment, the locking member 41 can be a screw, rivet, or bolt. When locking, the locking member 41 is screwed into the mounting hole on the locking plate 42 and the other mounting hole in sequence to fix the first sliding member 5.

[0041] Furthermore, the aforementioned folding pressing element 3 is an L-shaped lower pressing plate. This L-shaped lower pressing plate adopts the lower pressing plate in existing conventional platform-type overlock sewing machines, such as the L-shaped lower pressing plate mentioned in the lifting and folding mechanism for a platform-type overlock sewing machine with publication number CN 219586338 U. Alternatively, the folding pressing element 3 can also directly adopt the folding pressing element mentioned in the lifting and folding mechanism for a platform-type overlock sewing machine with publication number CN 219586338 U.

[0042] Furthermore, the hemming adjustment mechanism also includes a tubing mechanism, which is installed on this side pressing member 3 to hem one side of the fabric. The tubing mechanism adopts the tubing mechanism in the existing conventional platform-type coverstitch machine. In this embodiment, the structure and installation structure of the tubing mechanism are the same as those mentioned in the lifting hemming mechanism for a platform-type coverstitch machine disclosed in CN 219586338 U, so they will not be described in detail.

[0043] This embodiment describes a folding adjustment mechanism for a platform-type overlock sewing machine. The specific working process is as follows: Before use, if it is necessary to adjust the folding distance, the locking member 41 is manually removed. Then, the position of the first sliding member 5 relative to the worktable 1 is adjusted. The sliding of the first sliding member 5 drives the lifting cylinder 2 to slide, thereby causing the folding pressure member 3 to slide. This adjusts the folding distance between the folding pressure member 3 and the left side of the worktable 1. Then, the locking member 41 in the locking mechanism 4 is screwed into the two mounting holes in sequence to fix the first sliding member 5, ensuring that the first sliding member 5 can no longer slide.

[0044] After adjusting the folding gap, the present invention begins operation. One side of the fabric enters the folding area from the folding gap. This folding area refers to the space between the lower side of the L-shaped pressure plate and the workbench surface. The fabric hangs naturally along the left side of the workbench 1. Air is then blown into the folding area through the piping mechanism to fold the fabric along the left side of the workbench 1. During this process, the piston rod of the lifting cylinder 2 is in a retracted state. After the fabric is folded, the lifting cylinder 2 actuates, extending its piston rod and causing the folding pressure piece 3 to move upwards, thus folding the fabric... The lower side of the edge pressing piece 3 gradually approaches the worktable 1, that is, the distance between the lower side of the edge pressing piece 2 and the table surface of the worktable 1 becomes smaller, until the edge of the fabric is clamped between the worktable 1 and the lower side of the edge pressing piece 3, so that it can be pressed by the feeding mechanism of the platform-type coverstitch machine. During the upward movement, the pipeline mechanism does not move. Then the edge is sewn by the coverstitch machine to form a rolled edge. Then the piston rod 22 of the lifting cylinder 20 retracts so that the lower side plate 32 of the edge pressing piece 30 moves away from the worktable 10. Then the above steps are repeated to achieve the sequential rolled edge of multiple pieces of fabric.

[0045] This embodiment provides a hem adjustment mechanism for a platform-type overlock sewing machine. Compared with the prior art, the first sliding member 5 and the lifting cylinder 2 are not separate but are concentrated in the same mechanism. This reduces the size of the hem adjustment mechanism. Furthermore, since the first sliding member 5 can be directly or indirectly locked onto the frame 100, it can prevent misoperation of the platform-type overlock sewing machine when the hem spacing does not need to be adjusted (such as during use), thus ensuring the accuracy of the hem spacing.

[0046] Example 2

[0047] like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the first sliding member 5 and the first sliding structure together form the first sliding assembly. The first sliding assembly is used to adjust the folding distance of the folding pressing member 3. In this embodiment, there are two sets of the first sliding assembly, and the locking mechanism is adjusted.

[0048] Specifically, the two first sliding components are arranged side by side, and the two first sliding components are arranged sequentially from front to back. Using two sets of first sliding components can improve the stability of the folding pressing member 3 when moving longitudinally. In this embodiment, there are two lifting cylinders 2, and the two lifting cylinders 2 are paired with the two first sliding members 2 one-to-one. The cylinder bodies of the two lifting cylinders 2 are fixedly installed on the left end face of the first sliding member 2, and the two lifting cylinders 2 move synchronously. The piston rods of the two lifting cylinders 2 are connected to the lower side of the folding pressing member 3. In this way, the piston rods of the two lifting cylinders 2 move synchronously, driving the folding pressing member 3 to move up or down, thereby improving the stability of the folding pressing member 3 when it is raised or lowered, and ensuring that the folding pressing member 3 is not easily deviated or shaken.

[0049] Furthermore, the specific structure of the aforementioned locking mechanism is as follows: a locking plate 42 is disposed between the two first sliding members 5, that is, the front end of the locking plate 42 is fixedly installed on the rear side wall of the first sliding member 5 located on the front side, and the rear end of the locking plate 42 is fixedly installed on the front side wall of the first sliding member 5 located on the rear side; another locking plate 42 is installed between the two mounting plates 61, the two locking plates 42 are arranged side by side, and the mounting structure at both ends of the locking plate 42 is the same as that of the aforementioned locking plate 42, so it will not be described in detail; mounting holes are respectively opened on the two locking plates 42, and locking members 41 are provided in the two corresponding mounting holes. In this way, when locking, the locking members 41 are screwed into the two mounting holes in sequence, and the first sliding member 5 and the frame 100 are indirectly installed together through the locking members 41. Since the position of the frame 100 is fixed, the locking of the locking members 4 can prevent the first sliding member 5 from sliding and position it in the corresponding position; when disassembling, the locking members 4 are screwed out from the two mounting holes to unlock the first sliding member 5.

[0050] This embodiment provides a folding adjustment mechanism for a platform-type overlock sewing machine. It employs two sets of first sliding components to further improve the stability of the folding pressure piece 3 during longitudinal and vertical movement, and to prevent the folding pressure piece 3 from shifting or shaking.

[0051] Example 3

[0052] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the folding adjustment mechanism further includes a second sliding member 7, which is installed on the left side wall of the first sliding member 5 in a manner that allows it to slide up and down. In addition, the installation position of the locking mechanism has been adjusted in this embodiment.

[0053] Specifically, the second sliding member 7 is a sliding block in the shape of a straight line. The second sliding member 7 is arranged vertically, and the upper end of the second sliding member 7 is fixedly installed on the left side wall of the vertical side of the folding edge pressing member 3. The first sliding member 7 is slidably installed on the left side wall of the first sliding member 5 through the second sliding joint. The cylinder body of the above-mentioned lifting cylinder 2 is fixedly installed on the locking plate 42.

[0054] The second sliding structure is the same as the first sliding structure. Specifically, the second sliding structure includes a second slide rail 71 and a second sliding block 72 that are slidably engaged. The second sliding block 72 is provided on the left side wall of the first sliding member 5. The second sliding block 72 is arranged vertically. The second slide rail 71 is fixedly installed on the right side wall of the second sliding member 7. The second slide rail 71 is arranged vertically. In this way, the second sliding member 7 slides relative to the first sliding member 5 through the sliding engagement of the second slide rail 71 and the second sliding block 72.

[0055] Furthermore, the specific structure of the locking mechanism is as follows: the frame 100 is indirectly mounted with a mounting base 64 via a mounting plate 61. That is, the mounting base 64 is fixedly mounted on the front or rear side wall of the lower side of the mounting plate 61. The mounting base 64 is located on the right side of the locking plate 42, and the left side wall of the mounting base 64 and the locking plate 42 are respectively provided with corresponding mounting holes. Locking members 42 are provided in the two corresponding mounting holes. In this way, the first sliding member 5 is fixed by screwing the locking members 42 into the two mounting holes.

[0056] In this embodiment, the specific working process of the second sliding member 7 is as follows: the piston rod of the lifting cylinder 2 moves, taking the extension of the piston rod as an example. The extension of the piston rod pushes the folding pressing member 3 to move upward. Since the folding pressing member 3 and the second sliding member 7 are assembled together, the second sliding member 7 will slide upward along the second slide rail 71 during the upward movement of the folding pressing member 3. In this way, the cooperation between the second sliding member 7 and the lifting cylinder 2 further improves the stability of the folding pressing member 3 during the up and down movement.

[0057] Example 4

[0058] like Figure 4-6 As shown, the difference between this embodiment and embodiment three is that the second sliding member 7 and the second sliding structure together form the second sliding assembly, which is used to drive the folding pressing member 3 to rise and fall. In this embodiment, there are two sets of the second sliding assembly.

[0059] Specifically, the two second sliding components are arranged side by side, and the two second sliding components are arranged sequentially from front to back. Using two sets of second sliding components can improve the stability of the folding pressing part 3 when it moves up and down. In this embodiment, there is one lifting cylinder 2, which is fixedly installed in the middle position of the locking plate 42. The locking plate 42 is located between the first sliding parts 5. That is, the front end of the locking plate 42 is fixedly installed on the rear side wall of the first sliding part 5 located on the front side, and the rear end of the locking plate 42 is fixedly installed on the front side wall of the first sliding part 5 located on the rear side. The mounting base 64 and the locking plate 42 are assembled with the same locking mechanism as in Embodiment 3, which will not be described again here.

[0060] This embodiment provides a hem adjustment mechanism for a platform-type overlock sewing machine. It employs two sets of first sliding components and two sets of second sliding components to further improve the stability of the hem pressing member 3 during longitudinal and vertical movement, and to prevent the hem pressing member 3 from shifting or shaking.

[0061] The above description is only a preferred embodiment of this invention. All equivalent changes and modifications made within the scope of the claims of this utility model shall fall within the scope of the claims of this utility model.

Claims

1. A hem adjustment mechanism for a platform-type overlock sewing machine, characterized in that: The device includes a lifting cylinder, a hemming presser, and a worktable mounted on the frame of a platform-type overlock sewing machine. A first sliding member is mounted on the lower side of the worktable in a manner that allows it to slide longitudinally along the worktable, and a locking mechanism is used to position the first sliding member. The cylinder body of the lifting cylinder is directly or indirectly mounted on the first sliding member, and the piston rod of the lifting cylinder is connected to the hemming presser. The locking mechanism includes a locking member and a locking plate arranged laterally. The locking plate is mounted on the side wall of the first sliding member, and the locking member is detachably mounted on the locking plate and the frame.

2. The hem adjustment mechanism for a platform-type overlock sewing machine according to claim 1, characterized in that: The first sliding member is indirectly slidably mounted on the lower side of the workbench via a first sliding structure. The first sliding structure includes a first slide rail and a first sliding block that are slidably engaged. A mounting plate arranged longitudinally is mounted on the frame. The first slide rail arranged longitudinally is mounted on the lower side of the mounting plate. The first sliding block is mounted on the upper side of the first sliding member.

3. The hem adjustment mechanism for a platform-type overlock sewing machine according to claim 2, characterized in that: The locking plate and the frame are respectively provided with corresponding mounting holes, and the locking element is provided in the two corresponding mounting holes.

4. The hem adjustment mechanism for a platform-type overlock sewing machine according to claim 2, characterized in that: The first sliding member and the first sliding structure together form a first sliding assembly for adjusting the folding distance of the folding pressure member. There are two sets of the first sliding assembly, and the two first sliding assemblies are arranged side by side. The lifting cylinder is respectively installed on the end of the first sliding member of the two first sliding assemblies away from the frame.

5. The hem adjustment mechanism for a platform-type overlock sewing machine according to claim 4, characterized in that: The locking plate is located between the two first sliding members, and the two ends of the locking plate are respectively installed on their respective adjacent first sliding members. Another locking plate is installed between the two mounting plates. The two locking plates are respectively provided with corresponding mounting holes, and the locking members are provided in the two corresponding mounting holes.

6. The hem adjustment mechanism for a platform-type overlock sewing machine according to claim 2, characterized in that: It also includes a second sliding member that is mounted on the first sliding member in a way that allows it to slide up and down. The upper end of the second sliding member is mounted on the folded edge pressing member, and the second sliding member is slidably mounted on the first sliding member through a second sliding structure; wherein, the cylinder body of the lifting cylinder is fixedly mounted on the locking plate.

7. The hem adjustment mechanism for a platform-type overlock sewing machine according to claim 6, characterized in that: The frame is indirectly mounted with a mounting base via the mounting plate. The mounting base and the locking plate are respectively provided with corresponding mounting holes, and the locking element is provided in the two corresponding mounting holes.

8. The hem adjustment mechanism for a platform-type overlock sewing machine according to claim 6, characterized in that: The second sliding member and the second sliding structure together form a second sliding assembly for driving the folding pressure member to rise and fall. There are two sets of the second sliding assembly, and the two sets of the second sliding assembly are arranged side by side. The two sets of the second sliding assembly share the same lifting cylinder, and the cylinder body of the lifting cylinder is installed in the middle position of the locking plate.

9. A hem adjustment mechanism for a platform-type overlock sewing machine according to claim 6 or 7, characterized in that: The locking plate is located between the two second sliding members, and the two ends of the locking plate are respectively installed on their respective adjacent first sliding members. The frame is indirectly installed with a mounting base through the mounting plate. The mounting base and the locking plate are respectively provided with corresponding mounting holes, and the locking member is provided in the two corresponding mounting holes.

10. A hem adjustment mechanism for a platform-type overlock sewing machine according to any one of claims 1-8, characterized in that: The first slider is an L-shaped slider block.

Images