Semi-automatic hem fall tacking device

Abstract

The application relates to a semi-automatic hem folding and sewing device, which comprises a gas conveying and blowing mechanism, a cloth guide plate mechanism and a driving mechanism. The gas conveying and blowing mechanism comprises a body and a main gas blowing component, the main gas blowing component comprises a gas blowing hole, the body is provided with a boss, and a gas flow channel is arranged on the boss. The cloth guide plate mechanism is movably connected with the body and located on the opposite side of the main gas blowing component, and the cloth guide plate mechanism comprises a seat body and a cloth guide plate. The cloth guide plate covers the gas flow channel, and a flow guide groove is arranged on the cloth guide plate corresponding to one of the gas flow channels. The driving mechanism is arranged on the side of the body and comprises a frame and a pneumatic cylinder. The two ends of the pneumatic cylinder are respectively connected with the support and the seat body. The cloth guide plate mechanism is driven by the pneumatic cylinder and can move on the body. In this way, the generation of turbulent flow can be reduced by guiding the gas through the flow guide groove, so that the hem can be closely attached to the lower surface of the cloth guide plate.

Description

Technical Field

[0001] This application relates to the technical field of a sewing machine, and more particularly to a semi-automatic hem folding and sewing device. Background Technology

[0002] In the sewing process of some garments, the fabric is folded and sewn, such as the hem or cuffs of a top. In the early days of manual sewing, the edge of the fabric was folded inward along the fold beforehand, and then the sewing machine was used to sew the fabric on both sides of the fold together after the fold was completed.

[0003] The aforementioned sewing method requires a high level of experience and skill from the sewing personnel, as well as special techniques for sewing different materials. Under numerous requirements and conditions, it is rare to consistently produce high-quality products. Therefore, devices that assist in the hemming process have emerged to address this issue. These devices not only reduce the skill and proficiency required of the sewing personnel but also consistently maintain a high yield rate for most sewing products made of the same material.

[0004] While similar devices available on the market can achieve hemming, their sewing stability is not high, and they still require special hand gestures from personnel to achieve the desired sewing standard. Therefore, a certain level of skill is required from the sewing personnel.

[0005] In view of this, the applicant has devoted himself to researching and applying theoretical principles to address the shortcomings of the prior art, and has made every effort to solve the aforementioned problems, which has become the target of the applicant's improvement. Utility Model Content

[0006] One objective of this application is to provide a semi-automatic hem folding and sewing device, wherein when the air blows through the air hole to the guide plate, the air is guided by the guide groove to reduce the generation of turbulence, thereby enabling the hem of the sewing material to adhere tightly to the lower surface of the guide plate.

[0007] To achieve the above objectives, this application provides a semi-automatic hem folding and sewing device, including a gas conveying and blowing mechanism, a guide plate mechanism, and a driving mechanism. The gas conveying and blowing mechanism includes a body and a main blowing component fixed to the body. The main blowing component includes multiple blowing holes. The middle section of the body has a boss, and multiple gas channels are provided at the positions of the boss corresponding to each blowing hole. The guide plate mechanism is movably connected to the body and located on the opposite side of the main blowing component. The guide plate mechanism includes a base and a guide plate fixed to the base. The guide plate covers each gas channel, and a guide groove is provided on the guide plate corresponding to one of the gas channels. The driving mechanism is located on the side of the body. The driving mechanism includes a bracket and a pneumatic cylinder. The bracket is fixed to the body, and the two ends of the pneumatic cylinder are respectively connected to the bracket and the base. The guide plate mechanism is driven by the pneumatic cylinder and can move on the body.

[0008] In one embodiment, the guide groove extends along the moving direction of the guide plate.

[0009] In one embodiment, the guide channel includes a front guide section, a middle guide section extending from the front guide section, and a rear guide section extending from the middle guide section.

[0010] In one embodiment, the cross-section of the leading section is an arc-shaped groove with a depth increasing inward.

[0011] In one embodiment, the cross-section of the middle guide section is a straight groove.

[0012] In one embodiment, the cross-section of the rear guide section is an arc-shaped groove with a depth decreasing inward.

[0013] In one embodiment, there are two guide grooves and two air blowing holes, and three gas flow channels. One guide groove is configured to be aligned with the front gas flow channel and the front air blowing hole to jointly form the front folded edge area. The other guide groove is configured to be aligned with the rear gas flow channel and the rear air blowing hole to jointly form the rear folded edge area.

[0014] In one embodiment, it further includes a flat-blowing pre-folding nozzle, which is fixed to the body and formed on the front side of the main blowing component.

[0015] In one embodiment, it further includes an oblique-blowing pre-folding nozzle, which is fixed to the body and formed in front of the horizontal-blowing pre-folding nozzle.

[0016] In one embodiment, it further includes a slanted pre-folding nozzle, which is fixed to the body and formed on the front side of the main blowing component.

[0017] In one embodiment, the gas delivery and blowing mechanism further includes an airflow guide plate fixed to the body and formed below the main blowing member.

[0018] In one embodiment, the gas delivery and blowing mechanism further includes an adjusting screw, and the body is provided with a screw hole corresponding to the position of the main blowing component. The adjusting screw is screwed into the screw hole and used to adjust the elevation angle generated by the main blowing component and the airflow guide plate.

[0019] In one embodiment, the guide plate mechanism further includes a lever assembly disposed below the guide plate.

[0020] In one embodiment, the lever assembly includes a lever, a torsion spring, and a fastening assembly, wherein the fastening assembly passes through the torsion spring and the lever and is fixed to the guide plate.

[0021] In one embodiment, the lever is provided with a receiving groove, and a positioning groove communicating with the receiving groove is provided around the receiving groove. The torsion spring has a first arm and a second arm. The torsion spring is disposed in the receiving groove, the first arm is embedded and fixed in the positioning groove, and the second arm is hooked on the side of the lever.

[0022] This application also has the following advantages: it is not only simple and easy to adjust, but also extremely convenient and user-friendly for operators and maintainers. Attached Figure Description

[0023] Figure 1 This is an exploded view of the guide plate mechanism of this application.

[0024] Figure 2 This is an appearance drawing of the guide plate mechanism assembly of this application.

[0025] Figure 3 This is an exploded view of the semi-automatic hem folding and sewing device of this application.

[0026] Figure 4 This is an appearance drawing of the semi-automatic hem folding and sewing device assembly of this application.

[0027] Figure 5 This is another perspective view of the semi-automatic hem folding and sewing device of this application.

[0028] Figure 6 This is a cross-sectional view of the semi-automatic hem folding and sewing device assembly of this application.

[0029] Figure 7 This is a cross-sectional view from another direction of the semi-automatic hem folding and sewing device of this application.

[0030] Figure 8 This is a schematic diagram showing the semi-automatic hem folding and sewing device of this application in use.

[0031] Figure 9 This is a cross-sectional view of the semi-automatic hem folding and sewing device of this application in use.

[0032] Figure 10 This is a stitch diagram of the garment sewn by the semi-automatic hem folding and sewing device of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10: Gas delivery and blowing mechanism;

[0035] 11: Ontology;

[0036] 111: Boss;

[0037] 112: Gas flow channel;

[0038] 113: Screw hole;

[0039] 12: Main air blowing component;

[0040] 121: Concave arc-shaped opening;

[0041] 122: Air inlet;

[0042] 13: Linear guide rail;

[0043] 14: Airflow guide plate;

[0044] 15: Adjusting screws;

[0045] 20: Guide plate mechanism;

[0046] 21: base;

[0047] 22: Guide plate;

[0048] 221: Flow guide channel;

[0049] 222: Leading section;

[0050] 223: Mid-frontal guidance segment;

[0051] 224: Post-guided section;

[0052] 23: Toggle lever assembly;

[0053] 231: Lever;

[0054] 2311: Reception slot;

[0055] 2312: Positioning groove;

[0056] 232: Torsion spring;

[0057] 2321: First arm body;

[0058] 2322: Second arm body;

[0059] 233: Screw fastening assembly;

[0060] 30: Drive mechanism;

[0061] 31: Bracket;

[0062] 32: Pneumatic cylinder;

[0063] 321: Cylinder block;

[0064] 322: Pull rod;

[0065] 40: Flat-blown pre-folding nozzle;

[0066] 50: Inclined pre-folding nozzle;

[0067] 9: Sewing materials;

[0068] 91: Lines. Detailed Implementation

[0069] The detailed description and technical content of this application are explained below with reference to the accompanying drawings. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit this application.

[0070] Please see Figures 1 to 7 As shown, this application provides a semi-automatic hem folding and sewing device for sewing machines (not shown) to sew the hem or cuff of garments. This semi-automatic hem folding and sewing device mainly includes a gas conveying and blowing mechanism 10, a guide plate mechanism 20, and a drive mechanism 30.

[0071] The gas delivery and blowing mechanism 10 mainly includes a body 11, a main blowing component 12, and a linear slide rail 13. The body 11 is generally a long strip-shaped block. The main blowing component 12 is fixed on the right side of the body 11 and is connected to the internal gas delivery channel (not shown) of the main blowing component 12 through a gas delivery pipe (not shown). The other end of the gas delivery pipe is connected to a gas pressure source (not shown). The main blowing component 12 has a concave arc-shaped opening 121, and multiple blowing holes 122 are provided near the lower end of the concave arc-shaped opening 121 in the area adjacent to the body 11 (e.g., ...). Figure 4 As shown, a boss 111 extends from the middle section of the body 11. Multiple gas channels 112 are provided on the boss 111 corresponding to the positions of each air inlet 122. In this embodiment, there are two air inlets 122 and three gas channels 112, with two air inlets 122 respectively aligned with the first and last gas channels 112. A linear slide rail 13 is mounted on the left side of the body 11.

[0072] The guide plate mechanism 20 is movably connected to the body 11 and located on the opposite side of the main air blowing component 12. It mainly includes a base 21 and a guide plate 22. The base 21 is fixed below the guide plate 22, and the guide plate 22 is fixed above the aforementioned linear slide rail 13. The side of the guide plate 22 away from the base 21 covers the aforementioned gas flow channels 112. At least one guide groove 221 is formed on the inner surface of the guide plate 22 facing the body 11. This guide groove 221 corresponds to one of the aforementioned gas flow channels 112. In this embodiment, there are two guide grooves 221 and three gas flow channels 112 (e.g., ...). Figure 7 As shown), the guide groove 221 is configured to face the gas flow channel 112 and the air blowing hole 122 on the front side, so as to jointly form the front folded edge area, and the other guide groove 221 is configured to face the gas flow channel 112 and the air blowing hole 122 on the rear side, so as to jointly form the rear folded edge area.

[0073] The drive mechanism 30 is located on the side of the main body 11 and mainly includes a bracket 31 and a pneumatic cylinder 32. The bracket 31 is fixed to the main body 11, and the two ends of the pneumatic cylinder 32 are connected to the bracket 32 ​​and the base 21, respectively. The guide plate mechanism 20 is driven by the pneumatic cylinder 32 and can move on the main body 11 under the combined action of the linear slide rail 13. The pneumatic cylinder 32 includes a cylinder body 321 and a pull rod 322. One end of the cylinder body 321 is connected to the bracket 31 by bolts, and one end of the pull rod 322 is connected to the cylinder body 321, while the other end is connected to the base 21 by bolts.

[0074] In one embodiment, the gas delivery and blowing mechanism 10 further includes an airflow guide plate 14, which is fixed on the body 11 and formed below the main blowing member 12, to guide the flow direction of the gas blown out of each blowing hole 122, so that the hem can be more stable and flat.

[0075] In one embodiment, the gas delivery and blowing mechanism 10 further includes an adjusting screw 15 (e.g., Figure 6 As shown), the body 11 is provided with a screw hole 113 corresponding to the position of the main air blowing component 12 (as shown). Figure 6 As shown, the adjusting screw 15 is screwed into the screw hole 13. Under normal circumstances, keeping the main air blowing component 12 and the airflow guide plate 14 in a horizontal position is sufficient for most sewing fabric needs. However, for very thin sewing fabrics, it is necessary to adjust the main air blowing component 12 and the airflow guide plate 14 to tilt upwards at an appropriate angle so that the space between the end edge of the airflow guide plate 14 and the guide plate 22 can be reduced, so as not to cause excessive folding or curling of the sewing fabric.

[0076] In one embodiment, the guide groove 221 extends along the moving direction of the guide plate 22 and mainly includes a front guide section 222, a middle guide section 223 extending from the front guide section 222, and a rear guide section 224 extending from the middle guide section 223. The cross-section of the front guide section 222 is an arc-shaped groove with a depth increasing inward, the cross-section of the middle guide section 223 is a straight groove, and the cross-section of the rear guide section 224 is an arc-shaped groove with a depth decreasing inward. In this way, when gas enters this guide groove 221, it can generate an adsorption force on the surrounding fabric, so that the fabric can be tightly attached to the inner surface of the guide plate 22.

[0077] In one embodiment, the guide plate mechanism 20 of this application further includes a lever assembly 23, which is disposed below the guide plate 22. The lever assembly 23 mainly includes a lever 231, a torsion spring 232, and a screw assembly 233. The screw assembly 233 passes through the torsion spring 232 and the lever 231 and is screwed to the guide plate 22. The lever 231 is provided with a receiving groove 2311, and a positioning groove 2312 communicating with the receiving groove 2311 is provided around the receiving groove 2311. The torsion spring 232 has a first arm 2321 and a second arm 2322. The torsion spring 232 is disposed in the receiving groove 2311, the first arm 2321 is embedded and fixed in the positioning groove 2312, and the second arm 2322 is hooked on the side of the lever 231. When in use, when the hem is almost completely sewn, the starting point will touch the lever 231 and be pushed to the guide plate 22. At this time, the sensor senses and sends a signal to the controller to drive the drive device 30, so that the guide plate 22 is removed from the hem and the machine starts counting stitches until the starting point is reached and then stops.

[0078] In one embodiment, the semi-automatic hem folding and sewing device of this application further includes a flat-blowing pre-folding nozzle 40, which is fixed to the aforementioned body 11 and formed on the front side of the main air blowing member 12. One end of the flat-blowing pre-folding nozzle 40 is connected to an air pressure source (not shown in the figure). The flat-blowing pre-folding nozzle 40 blows air into the edge of the sewing material before it reaches the guide plate 22, so that it can bend along the front edge of the guide plate 22.

[0079] In one embodiment, the semi-automatic hem folding and sewing device of this application further includes an oblique-blowing pre-folding air nozzle 50, which is fixed to the aforementioned body 11 and formed in front of the horizontal-blowing pre-folding air nozzle 40. The oblique-blowing pre-folding air nozzle 50 is used to pre-blow air onto the edge of the sewing material before it reaches the horizontal-blowing pre-folding air nozzle 40, causing it to bend. Similarly, only the oblique-blowing pre-folding air nozzle 50 can be provided, without the horizontal-blowing pre-folding air nozzle 40. In this case, the oblique-blowing pre-folding air nozzle 50 is formed in front of the main air blowing member 12.

[0080] Please see Figures 8 to 10 As shown, during operation, when the fabric edge of the body 11 is aligned with the needle, more fabric is left at the edge as the needle moves to the left; conversely, less fabric is left as the needle moves to the right. In the initial state, the guide plate 22 is pushed to the extended position on the left by the drive mechanism 30. At this time, the sewing operator folds the fabric along the crease and places it above the airflow guide plate 14 and under the presser foot of the sewing machine (not shown), with the edge of the fabric aligned with the edge of the body 11. When the presser foot of the sewing machine is lowered, the guide plate 22 moves into the concave arc-shaped opening 121 of the main air blowing component 12. After it is in place, the air holes 122, the flat pre-folding nozzle 40, and the oblique pre-folding nozzle 50 of the main air blowing component 12 blow air simultaneously, making the lower side of the fabric fold smooth due to the airflow. Figure 10 This is a real-world diagram of the fabric 9 and its stitch 91 sewn using the semi-automatic hem-folding and sewing device of this application.

[0081] In addition, when sewing thinner or elastic fabrics, the air volume needs to be reduced to prevent wrinkles; conversely, when sewing thicker fabrics, the increased thickness reduces air permeability, so the air flow rate of the nozzle needs to be large to keep the fabric smooth.

[0082] The above description is only a preferred embodiment of this application and is not intended to limit the patent scope of this application. Other equivalent changes that utilize the patent spirit of this application should all fall within the patent scope of this application.

Claims

1. A semi-automatic hem folding and sewing device, characterized in that, include: A gas delivery and blowing mechanism includes a body and a main blowing component fixed to the body. The main blowing component includes multiple blowing holes. The middle section of the body has a boss, and multiple gas flow channels are provided on the boss at positions corresponding to each of the blowing holes. A guide plate mechanism, movably connected to the body and located on the opposite side of the main air blowing component, includes a base and a guide plate fixed to the base. The guide plate covers each of the gas flow channels, and a guide groove is provided on the guide plate corresponding to one of the gas flow channels; and A drive mechanism is provided on the side of the main body. The drive mechanism includes a bracket and a pneumatic cylinder. The bracket is fixed to the main body. The two ends of the pneumatic cylinder are respectively connected to the bracket and the base. The guide plate mechanism is driven by the pneumatic cylinder and can move on the main body.

2. The semi-automatic hem folding and sewing device as described in claim 1, characterized in that, The guide groove extends along the moving direction of the guide plate.

3. The semi-automatic hem folding and sewing device as described in claim 2, characterized in that, The guide channel includes a front guide section, a middle guide section extending from the front guide section, and a rear guide section extending from the middle guide section.

4. The semi-automatic hem folding and sewing device as described in claim 3, characterized in that, The cross-section of the leading section is an arc-shaped groove with a depth increasing inward.

5. The semi-automatic hem folding and sewing device as described in claim 3, characterized in that, The cross-section of the middle guide section is a straight groove.

6. The semi-automatic hem folding and sewing device as described in claim 3, characterized in that, The cross-section of the rear guide section is an arc-shaped groove with a depth decreasing inward.

7. The semi-automatic hem folding and sewing device as described in claim 1, characterized in that, There are two guide channels and two air blowing holes, and three gas flow channels. One of the guide channels is arranged opposite the front gas flow channel and the front air blowing hole to form the front folded edge area. The other guide channel is arranged opposite the rear gas flow channel and the rear air blowing hole to form the rear folded edge area.

8. The semi-automatic hem folding and sewing device as described in claim 1, characterized in that, It also includes a flat-blowing pre-folding nozzle, which is fixed to the body and formed on the front side of the main blowing component.

9. The semi-automatic hem folding and sewing device as described in claim 8, characterized in that, It also includes a slanted pre-folding nozzle, which is fixed to the body and formed on the front side of the flat pre-folding nozzle.

10. The semi-automatic hem folding and sewing device as described in claim 1, characterized in that, It also includes a slanted pre-folding nozzle, which is fixed to the body and formed on the front side of the main blowing component.

11. The semi-automatic hem folding and sewing device as described in claim 1, characterized in that, The gas delivery and blowing mechanism also includes an airflow guide plate, which is fixed on the body and formed below the main blowing component.

12. The semi-automatic hem folding and sewing device as described in claim 11, characterized in that, The gas delivery and blowing mechanism also includes an adjusting screw. The body has a screw hole corresponding to the position of the main blowing component. The adjusting screw is screwed into the screw hole and is used to adjust the elevation angle of the main blowing component and the airflow guide plate.

13. The semi-automatic hem folding and sewing device as described in claim 1, characterized in that, The guide plate mechanism also includes a lever assembly, which is disposed below the guide plate.

14. The semi-automatic hem folding and sewing device as described in claim 13, characterized in that, The lever assembly includes a lever, a torsion spring, and a screw assembly, wherein the screw assembly passes through the torsion spring and the lever and is fixed to the guide plate.

15. The semi-automatic hem folding and sewing device as described in claim 14, characterized in that, The lever is provided with a receiving groove, and a positioning groove communicating with the receiving groove is provided around the receiving groove. The torsion spring has a first arm and a second arm. The torsion spring is disposed in the receiving groove, the first arm is embedded and fixed in the positioning groove, and the second arm is hooked to the side of the lever.

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