Sewing machine with follow-up edge covering function

Abstract

The utility model provides a follow-up hemming sewing machine. The follow-up hemming sewing machine comprises a hemmer, a first transmission mechanism and a moving mechanism. The moving mechanism is connected between the hemmer and the first transmission mechanism; the moving mechanism can move in a reciprocating mode in the feeding direction of feeding teeth of the sewing machine. The first transmission mechanism works to drive the moving mechanism to move in a reciprocating mode so that the hemmer can move in a reciprocating mode along with the moving mechanism. And the hemmer and the feeding teeth move synchronously. According to the sewing machine with the follow-up hemming function, the hemmer is fixed to the moving mechanism, the moving mechanism is connected with the first transmission mechanism, the first transmission mechanism drives the moving mechanism to enable the hemmer and the feeding teeth to move synchronously, and the phenomena of bag disengaging, bag missing and the like are prevented when large-stitch-length turning hemming is sewn.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing, in particular to a sewing machine with follow-up hemming. Background Art

[0002] At present, the installation method of the hemming machine on the market is mainly fixed. The advantage of the fixed type is that it is easy to install, but the disadvantage is that it is easy to get rid of or leak the bag when sewing large stitch length turns. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a sewing machine with follow-up hemming, which aims to solve the problem in the prior art that the hemming is prone to slipping and leaking when sewing hemming with large stitch length and turns.

[0004] To achieve the above-mentioned purpose, the utility model provides a sewing machine with follow-up hemming, including a crimper, a first transmission mechanism, and a moving mechanism; the moving mechanism is connected between the crimper and the first transmission mechanism; the moving mechanism can move back and forth along the feeding direction of the feed dog of the sewing machine; the first transmission mechanism drives the moving mechanism to move back and forth so that the crimper moves back and forth with the moving mechanism; the crimper moves synchronously with the feed dog.

[0005] Furthermore, the moving mechanism is a guide plate, and the guide plate can be moved along a direction parallel to the feeding direction of the feed dog and is arranged on the base of the sewing machine.

[0006] Furthermore, guide pressure plates are respectively provided on both sides of the reciprocating movement direction above the upper surface of the guide plate, and the guide pressure plates are fixedly connected to the base; the guide plate can move between the two guide pressure plates; and the lower surface of the guide plate is connected to the first transmission mechanism.

[0007] Furthermore, the first transmission mechanism includes a first crank, a second crank and a first connecting rod, the two ends of the first connecting rod are rotatably connected to the first crank and the second crank respectively, the first crank and the second crank are fixedly connected to the tooth lifting shaft and the feed shaft of the sewing machine respectively; the first connecting rod is rotatably connected to the lower surface of the guide plate.

[0008] Furthermore, the ends of the first crank and / or the second crank connected to the first connecting rod are provided with a fork-shaped structure with an opening, and the fork-shaped structure is connected to the first connecting rod via a pin.

[0009] Furthermore, a groove is provided on one of the lower surface of the guide plate and the middle portion of the first connecting rod, and a pin is fixedly provided on the other one, and the free end of the pin is located in the groove.

[0010] Furthermore, it also includes a second transmission mechanism, which includes a third crank, a fourth crank and a second connecting rod. The two ends of the second connecting rod are rotatably connected to the third crank and the fourth crank respectively. The third crank and the fourth crank are fixedly connected to the tooth lifting shaft and feed shaft of the sewing machine respectively; the second connecting rod is provided with a feed tooth.

[0011] Furthermore, the ends of the third crank and / or the fourth crank connected to the second connecting rod are provided with a fork-shaped structure with an opening, and the fork-shaped structure is connected to the second connecting rod via a pin.

[0012] Furthermore, at least one guide rod is provided on the base of the sewing machine at a position corresponding to the crimper.

[0013] The utility model provides a sewing machine with follow-up hemming. The hemming device is fixed on a moving mechanism, and the moving mechanism is connected to a first transmission mechanism. The first transmission mechanism drives the moving mechanism to make the hemming device and the feed dog move synchronously, thereby preventing the hemming device from falling off or leaking when sewing hemming with a large stitch length and turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 This is a schematic diagram of the structure of the crimping device provided in an embodiment of the present application installed on a base;

[0016] Figure 2 yes Figure 1 Exploded diagram of the transmission mechanism;

[0017] Figure 3 yes Figure 1 Schematic diagram of the transmission mechanism.

[0018] Among them, the reference numerals in the figures are:

[0019] 10 crimping device 20 feeding dog 30 base

[0020] 40 guide plate 41 guide pressure plate 51 first crank

[0021] 52 second crank 53 first connecting rod 54 groove

[0022] 55 connecting seat 60 lifting shaft 70 feeding shaft

[0023] 81 third crank 82 fourth crank 83 second connecting rod

[0024] 90 guide rod DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0026] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0027] An embodiment of the present utility model provides a sewing machine with follow-up hemming, comprising a crimper 10, a first transmission mechanism, and a moving mechanism; the moving mechanism is connected between the crimper 10 and the first transmission mechanism; the moving mechanism can move back and forth along the feeding direction of the feed dog 20 of the sewing machine; the first transmission mechanism drives the moving mechanism to move back and forth so that the crimper 10 moves back and forth with the moving mechanism; the crimper 10 moves synchronously with the feed dog 20.

[0028] When implementing it specifically, Figures 1 to 3 As shown, the hem crimper 10 is located above the base 30 of the sewing machine. A movable mechanism is mounted on the base, capable of reciprocating along the feed direction (hereinafter referred to as the "forward-backward direction") of the sewing machine's feed dog 20. A first transmission mechanism is located below the base 30. Driven by the first transmission mechanism, the hem crimper 10 moves synchronously with the feed dog, thereby preventing bag slippage and leakage when sewing large-gauge, curved hems. The hem crimper 10 is conventional technology and will not be described in detail here.

[0029] The utility model provides a sewing machine with follow-up hemming. The hemming device is fixed on a moving mechanism, and the moving mechanism is connected to a first transmission mechanism. The first transmission mechanism drives the moving mechanism to make the hemming device and the feed dog move synchronously, thereby preventing the hemming device from falling off or leaking when sewing hemming with a large stitch length and turning.

[0030] Preferably, the moving mechanism is a guide plate 40 , and the guide plate 40 is movably arranged on the base 30 of the sewing machine in a direction parallel to the feeding direction of the feed dog 20 .

[0031] In a specific embodiment, the movable mechanism is a guide plate 40. The middle portion of the guide plate 40 is a first surface, and two stepped surfaces are provided on both sides along the front-to-back direction. The first surface is higher than the stepped surfaces on both sides and is used to fix to the hemming device 10. The stepped surfaces on both sides in the front-to-back direction are lower than the upper surface of the base 30, and a portion is located below the lower surface of the base 30, so that the guide plate 40 can reciprocate along the front-to-back direction of the sewing machine.

[0032] Preferably, guide pressure plates 41 are respectively provided on both sides of the reciprocating movement direction above the upper surface of the guide plate 40, and the guide pressure plates 41 are fixedly connected to the base 30; the guide plate 40 can move between the two guide pressure plates 41; the lower surface of the guide plate 40 is connected to the first transmission mechanism.

[0033] In specific implementation, at least a portion of the step surfaces on the front and rear sides of the guide plate 40 abuts against the guide pressure plate 41, and the guide pressure plate 41 is fixed on the base 30 of the sewing machine, and the lower surface of the guide plate 40 is connected to the first transmission mechanism, that is, the upper and lower surfaces of the guide plate 40 are constrained, so that the guide plate 40 can move between the two guide pressure plates.

[0034] Preferably, the first transmission mechanism includes a first crank 51, a second crank 52 and a first connecting rod 53, the two ends of the first connecting rod 53 are rotatably connected to the first crank 51 and the second crank 52 respectively, the first crank 51 and the second crank 52 are fixedly connected to the tooth lifting shaft 60 and the feed shaft 70 of the sewing machine respectively; the first connecting rod 53 is rotatably connected to the lower surface of the guide plate 40, as shown in the figure.

[0035] Preferably, the ends of the first crank 51 and / or the second crank 52 connected to the first connecting rod 53 are provided with a fork-shaped structure with an opening, and the fork-shaped structure is connected to the first connecting rod 53 via a pin.

[0036] In specific implementation, in this embodiment, a fork-shaped structure with an opening is provided at the end of the first crank 51 and the first connecting rod 53. The fork-shaped structure is connected to the first connecting rod 53 via a pin, thereby facilitating disassembly, assembly and maintenance.

[0037] Preferably, a groove 54 is provided on one of the lower surface of the guide plate 40 and the middle portion of the first connecting rod 53 , and a pin is fixedly provided on the other one, with the free end of the pin located in the groove 54 .

[0038] In a specific implementation, the groove 54 can be directly formed below the guide plate 40, that is, a protrusion is formed below the guide plate 40, and the groove 54 is provided in the protrusion. Alternatively, a connecting seat 55 can be fixedly connected below the guide plate 40, and the groove 54 is provided on the connecting seat 55, thereby facilitating production and installation.

[0039] Preferably, it also includes a second transmission mechanism, which includes a third crank 81, a fourth crank 82 and a second connecting rod 83. The two ends of the second connecting rod 83 are rotatably connected to the third crank 81 and the fourth crank 82 respectively. The third crank 81 and the fourth crank 82 are fixedly connected to the tooth lifting shaft 60 and the feed shaft 70 of the sewing machine respectively; the second connecting rod is provided with a feed tooth.

[0040] In a specific implementation, the first transmission mechanism and the second transmission mechanism are arranged in parallel, so that the feed dog 20 and the crimper 10 can move synchronously.

[0041] Preferably, the ends of the third crank 81 and / or the fourth crank 82 connected to the second connecting rod 83 are provided with a fork-shaped structure with an opening, and the fork-shaped structure is connected to the second connecting rod via a pin.

[0042] In specific implementation, in this embodiment, a fork-shaped structure with an opening is provided at the end of the third crank 81 and the second connecting rod 83, and the fork-shaped structure is connected to the second connecting rod 83 via a pin, thereby facilitating disassembly, assembly and maintenance.

[0043] Preferably, at least one guide rod 90 is provided on the base 30 of the sewing machine at a position corresponding to the hemming device 10. In a specific embodiment, the guide rod 90 is a guide rod 90 vertically arranged on the upper surface of the base 30, and is used to guide the hemming strip during hemming sewing so that it can enter the hemming device 10 correctly and smoothly.

[0044] The above are merely optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A sewing machine with follow-up hemming, characterized by: It includes a crimper, a first transmission mechanism, and a moving mechanism; the moving mechanism is connected between the crimper and the first transmission mechanism; the moving mechanism can move back and forth along the feeding direction of the feed dog of the sewing machine; the first transmission mechanism drives the moving mechanism to move back and forth so that the crimper moves back and forth with the moving mechanism; the crimper moves synchronously with the feed dog.

2. The sewing machine with follow-up hemming according to claim 1, characterized in that: The moving mechanism is a guide plate, and the guide plate can be moved along a direction parallel to the feeding direction of the feed dog and is arranged on the base of the sewing machine.

3. The sewing machine with follow-up hemming according to claim 2, characterized in that: Guide pressure plates are respectively provided on both sides of the reciprocating movement direction above the upper surface of the guide plate, and the guide pressure plates are fixedly connected to the base; the guide plate can move between the two guide pressure plates; the lower surface of the guide plate is connected to the first transmission mechanism.

4. The sewing machine with follow-up hemming according to claim 3, characterized in that: The first transmission mechanism includes a first crank, a second crank and a first connecting rod. The two ends of the first connecting rod are rotatably connected to the first crank and the second crank respectively. The first crank and the second crank are fixedly connected to the tooth lifting shaft and the feed shaft of the sewing machine respectively; the first connecting rod is rotatably connected to the lower surface of the guide plate.

5. The sewing machine with follow-up hemming according to claim 4, characterized in that: The ends of the first crank and / or the second crank connected to the first connecting rod are provided with a fork-shaped structure with an opening, and the fork-shaped structure is connected to the first connecting rod via a pin.

6. The sewing machine with follow-up hemming according to claim 4, characterized in that: A groove is provided on one of the lower surface of the guide plate and the middle portion of the first connecting rod, and a pin is fixedly provided on the other of the guide plate, with the free end of the pin being located in the groove.

7. The sewing machine with follow-up hemming according to any one of claims 1 to 6, characterized in that: It also includes a second transmission mechanism, which includes a third crank, a fourth crank and a second connecting rod. The two ends of the second connecting rod are rotatably connected to the third crank and the fourth crank respectively. The third crank and the fourth crank are fixedly connected to the tooth lifting shaft and the feed shaft of the sewing machine respectively; the second connecting rod is provided with a feed tooth.

8. The sewing machine with follow-up hemming according to claim 7, characterized in that: The ends of the third crank and / or the fourth crank connected to the second connecting rod are provided with a fork-shaped structure with an opening, and the fork-shaped structure is connected to the second connecting rod via a pin.

9. The sewing machine with follow-up hemming according to claim 1, characterized in that: At least one guide rod is provided on the base of the sewing machine at a position corresponding to the crimping device.

Images