Hemming device for sewing double-layer cuff edge

Abstract

According to the hemming device for sewing the double-layer cuff edge, a fixed-distance transmission structure is arranged, when the hemming device is used, a synchronous wheel is driven to rotate through a first driving element, so that a synchronous belt is driven to move, the synchronous belt is in contact with cloth in a pull cylinder, and thus the cloth is driven to pass through the pull cylinder to complete hemming; and the output length of the cloth can be controlled through the number of turns of rotation of the synchronous wheel, so that the output length of the cloth after hemming can be effectively controlled, the subsequent existence of redundant cuff cloth is avoided, the waste of the cloth is reduced, and meanwhile, the waste of the labor cost for removing the redundant cloth is also avoided.

Description

Technical Field

[0001] The utility model belongs to, and particularly relates to a hemming device for sewing double-layer cuff edges. Background Art

[0002] At present, the use of a drawtube is a relatively common device in the sewing field. The drawtube is also called a hemming device or an edge sewing device, and its common name is a nozzle. The drawtube is used to hem the fabric, so that both sides of the single-layer fabric are folded inward, and the inlay is placed in the gap channel of the inlay position. After being accurately aligned with the cuff edge of the sleeve body, the accurate positioning of the double-layer cuff edge (with inlay) sewing can be achieved. By adjusting the adjustment groove of the fixing part, cuffs of different widths can be sewn.

[0003] The existing drawtube structure cannot accurately control the length of the fabric passing through the drawtube. When sewing the cuff with a sewing machine, there is usually redundant cuff fabric, which is likely to cause waste of fabric and the excess fabric needs to be removed by secondary processing to keep the cuff beautiful, further causing waste of labor. Summary of the Utility Model

[0004] In order to solve the above problems existing in the prior art, the purpose of the utility model is to provide a hemming device for sewing double-layer cuff edges.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A hemming device for sewing double-layer cuff edges, the hemming device comprising: a drawtube for hemming a single-layer fabric into a double-layer fabric; a fixed-distance transmission mechanism in contact with the fabric in the drawtube and driving the single-layer fabric through the drawtube; the fixed-distance transmission mechanism includes a first driving element, a synchronous pulley and a synchronous belt. The first driving element is in transmission connection with the synchronous pulley, the synchronous belt is in contact with the fabric in the drawtube, and the synchronous pulley drives the synchronous belt to move, thereby driving the fabric to move in the drawtube.

[0007] Optionally, the drawtube includes a feeding groove and a hemming groove; the feeding groove is used for inputting the fabric, one end of the hemming groove is communicated with the feeding groove, and the width of the hemming groove gradually becomes smaller from one end to the other end, and the notch of the hemming groove faces the synchronous belt.

[0008] Optionally, the drawtube is installed on one side of a bottom plate, and a translation mechanism is arranged on the other side of the bottom plate. The translation mechanism is used to drive the fixed-distance transmission mechanism to approach or move away from the drawtube.

[0009] Optionally, the translation mechanism includes a second driving element and a mounting plate. The second driving element is arranged on the side of the bottom plate far from the drawtube. The second driving element is used to drive the mounting plate to approach or move away from the drawtube, and the fixed-distance transmission mechanism is mounted on the mounting plate.

[0010] Optionally, the drawing cylinder is inclined and arranged on the bottom plate. A first cushion plate is arranged on the bottom plate, and the second driving element is installed on the first cushion plate. The first cushion plate makes the synchronous belt parallel to the fabric inside the drawing cylinder.

[0011] Optionally, a second cushion plate is arranged on one side of the bottom plate away from the translation mechanism, and the drawing cylinder is installed on the second cushion plate.

[0012] Optionally, an adapter plate is installed on the mounting plate, and the first driving element and the synchronous pulley are both installed on the adapter plate.

[0013] Optionally, the adapter plate is L-shaped. At least one synchronous pulley is arranged at each end and the corner of the adapter plate. The synchronous pulley at one end of the adapter plate is in transmission connection with the first driving element.

[0014] Optionally, a tension pulley is also arranged at the corner of the adapter plate.

[0015] Optionally, a vertical connecting plate is arranged on the adapter plate, and the connecting plate is installed on the mounting plate.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The present utility model provides a hemming device for double-layer cuff edge sewing. By setting a fixed-distance transmission structure, during use, the first driving element drives the synchronous pulley to rotate, thereby driving the synchronous belt to move. Then, the synchronous belt contacts the fabric inside the drawing cylinder, thereby driving the fabric to complete hemming through the drawing cylinder. And the output length of the fabric can be controlled by the number of turns of the synchronous pulley, so that the output length of the fabric after hemming can be effectively controlled, thereby avoiding redundant cuff fabric in the subsequent process, reducing waste of fabric, and at the same time avoiding waste of labor costs for removing excess fabric. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present utility model.

[0019] Figure 2 is a top view of the present utility model.

[0020] Figure 3 is a schematic structural diagram of the translation mechanism.

[0021] Figure 4 is Figure 3 an enlarged schematic diagram of area A in

[0022] Figure 5 and Figure 6 is a schematic structural diagram of the fixed-distance transmission mechanism.

[0023] Figure 7 is a bottom view of the fixed-distance transmission mechanism.

[0024] Figure 8 It is a schematic diagram of the structure of the draw-in bobbin.

[0025] Figure 9 It is Figure 8 An enlarged schematic diagram of area B in it.

[0026] Figure 10 It is Figure 8 A schematic diagram of the structure of the hemming groove in it.

[0027] In the figure: 1 - bottom plate, 2 - translation mechanism, 21 - first cushion plate, 22 - second driving element, 23 - mounting plate, 3 - draw-in bobbin, 31 - feeding groove, 32 - hemming groove, 33 - second cushion plate, 4 - fixed-distance transmission mechanism, 41 - first driving element, 42 - adapter plate, 43 - connecting plate, 44 - synchronous pulley, 45 - tension pulley, 46 - synchronous belt. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0029] Such as Figures 1 - 9 A hemming device for sewing double-layer cuffs shown, the hemming device includes: a draw-in bobbin 3, and the draw-in bobbin 3 is used to hem a single layer of fabric through a gradually narrowing hemming groove 32 and form a double-layer fabric at the edge of the fabric. The output end of the draw-in bobbin 3 is connected to the sewing needle of the sewing machine, and the hemmed cuffs output from the draw-in bobbin 3 can be directly used for further processing. The draw-in bobbin 3 belongs to the prior art in the field of sewing machines, and its specific installation position will not be elaborated here.

[0030] A fixed-distance transmission mechanism 4, which contacts the fabric in the draw-in bobbin 3 and drives the single-layer fabric through the draw-in bobbin 3; the fixed-distance transmission mechanism 4 includes a first driving element 41, a synchronous pulley 44 and a synchronous belt 46, the first driving element 41 is in transmission connection with the synchronous pulley 44, the synchronous belt 46 contacts the fabric in the draw-in bobbin 3, and the synchronous pulley 44 drives the synchronous belt 46 to move, thereby driving the fabric to move in the hemming groove 32 of the draw-in bobbin 3.

[0031] In use, the first driving element 41 drives the synchronous pulley 44 to rotate, thereby driving the synchronous belt 46 to move. Then, the synchronous belt 46 contacts the fabric inside the drawing cylinder 3, thereby driving the fabric to complete hemming through the drawing cylinder 3. Moreover, the output length of the fabric can be controlled by the number of rotations of the synchronous pulley 44, so that the output length after the fabric is hemmed can be effectively controlled, thereby avoiding redundant cuff fabric in the subsequent process, reducing fabric waste, and also avoiding waste of labor costs for removing excess fabric.

[0032] As Figure 8 and Figure 9 shown, the drawing cylinder 3 specifically includes a feeding groove 31 and a hemming groove 32; the feeding groove 31 is used for inputting fabric, one end of the hemming groove 32 is communicated with the feeding groove 31, and the width of the groove body of the hemming groove 32 gradually decreases from one end to the other end, and the notch of the hemming groove 32 faces the synchronous belt 46.

[0033] Specifically, the feeding groove 31 is formed by two parallel sheet bodies, and the fabric is slightly clamped between the two sheet bodies. Without external force, the fabric will not move or fall off.

[0034] After the fabric passes through the feeding groove 31, it enters the hemming groove 32, and the hemming groove 32 is obliquely arranged on the bottom plate 1. The two side walls of the hemming groove 32 curl towards the center (as Figure 10 shown). After the fabric enters the hemming groove 32, the two side edges of the fabric curl towards the center along the side walls of the hemming groove 32, thereby forming the hem of the cuff.

[0035] In this embodiment, the sewing machine has a certain traction on the fabric at the outlet end of the drawing cylinder 3. When the fabric needs to move in the hemming groove 32, the synchronous belt 46 that presses against the fabric needs to rotate synchronously to drive the fabric to rotate. When the synchronous belt 46 stops rotating, the fabric stops output. When it is necessary to replace the fabric, the synchronous belt 46 needs to be moved away from the hemming groove 32. For this reason, a translation mechanism 2 is also provided in this embodiment.

[0036] Specifically, the drawing cylinder 3 is installed on one side of the bottom plate 1, and a translation mechanism 2 is arranged on the other side of the bottom plate 1. The translation mechanism 2 is used to drive the fixed-distance transmission mechanism 4 to approach or move away from the drawing cylinder 3.

[0037] As Figures 1 - 4 shown, the translation mechanism 2 includes a second driving element 22 and a mounting plate 23. The second driving element 22 is arranged on the side of the bottom plate 1 away from the drawing cylinder 3. The second driving element 22 is used to drive the mounting plate 23 to approach or move away from the drawing cylinder 3, and the fixed-distance transmission mechanism 4 is installed on the mounting plate 23.

[0038] Preferably, the second driving element 22 is a reciprocating cylinder, and when the piston cylinder of the second driving element 22 extends and presses against the curling groove 32, the cloth can only be moved by the synchronous belt 46. When the synchronous belt 46 stops after rotating for a certain length, the cloth also stops being output, and the length of the synchronous belt 46 is determined by the number of rotations of the synchronous wheel 44, so the output length of the cloth is always equal to the moving length of the synchronous belt 46.

[0039] Preferably, the first driving element 41 is a servo motor, which can accurately control the start and stop positions, thereby accurately controlling the number of rotations of the synchronous wheel 44, and further accurately controlling the length of the cloth output from the pull tube 3.

[0040] In this embodiment, when the piston rod of the second driving element 22 is retracted, the cloth in the hemming groove 32 can move freely, and the cloth can be taken out and replaced.

[0041] In this embodiment, the width of the synchronous belt 46 is between the width of the large end and the width of the small end of the curling groove 32 , so that the synchronous belt 46 can extend into the curling groove 32 .

[0042] In this embodiment, a second pad 33 is provided on the side of the bottom plate 1 away from the translation mechanism 2, and the pull cylinder 3 is mounted on the second pad 33. The second pad 33 makes the curling groove 32 present an inclined state as a whole (such as Figure 1 and Figure 8 As shown), the pull cylinder 3 is tiltedly arranged on the base plate 1, a first pad 21 is arranged on the base plate 1, and the second driving element 22 is installed on the first pad 21. The first pad 21 makes the synchronous belt 46 parallel to the cloth in the pull cylinder 3, so that the synchronous belt 46 can always pull the cloth along the length direction of the curling groove 32.

[0043] In this embodiment, the bottom plate 1 is mounted on the workbench of the sewing machine, and one end of the first pad 21 is provided with a plurality of strip grooves (such as Figure 3 As shown), the strip groove can control the installation position of the first pad 21 on the base plate 1, so as to be closer to or farther away from the pull tube 3; the other end has a wedge-shaped surface, and the second driving element 22 is installed on the wedge-shaped surface of the first pad 21 so as to remain parallel to the curling groove 32.

[0044] In this embodiment, a vertical connecting plate 43 is provided on the adapter plate 42 , the connecting plate 43 is mounted on the mounting plate 23 , and the first driving element 41 and the synchronous wheel 44 are both mounted on the adapter plate 42 .

[0045] like Figures 5 - 7 As shown, the adapter plate 42 is L-shaped, and a synchronous wheel 44 is provided at least at both ends and a corner of the adapter plate 42 . The synchronous wheel 44 at one end of the adapter plate 42 is drivingly connected to the first driving element 41 .

[0046] Specifically, a tension pulley 45 is further provided at the corner of the adapter plate 42. The synchronous pulley 44 at the corner is located at the apex of the corner, and the tension pulley 45 is located at the included angle of the corner. The tension pulley 45 makes the synchronous belt 46 form an L-shaped loop as a whole. At the same time, the tightness of the synchronous belt 46 on the synchronous pulley 45 can be controlled by changing the distance between the tension pulley 45 and the synchronous pulley 44 at the corner.

[0047] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0049] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A hemming device for sewing double-layer cuff edges, characterized in that: The crimping device comprises: A pull tube (3) is used to curl the single-layer cloth to form a double-layer cloth; A fixed-distance transmission mechanism (4) contacts the cloth in the pull cylinder (3) and drives the single-layer cloth to pass through the pull cylinder (3); The fixed-distance transmission mechanism (4) comprises a first driving element (41), a synchronous wheel (44) and a synchronous belt (46); the first driving element (41) is connected to the synchronous wheel (44) in a transmission manner; the synchronous belt (46) is in contact with the fabric in the pull cylinder (3); the synchronous wheel (44) drives the synchronous belt (46) to move, thereby driving the fabric to move in the pull cylinder (3).

2. A hemming device for double-layer cuff sewing according to claim 1, characterized in that: The pull tube (3) comprises a feed trough (31) and a curling trough (32); the feed trough (31) is used to input fabric, one end of the curling trough (32) is connected to the feed trough (31), and the width of the curling trough (32) gradually decreases from one end to the other end, and the notch of the curling trough (32) faces the synchronous belt (46).

3. A hemming device for double-layer cuff sewing according to claim 1, characterized in that: The pull cylinder (3) is installed on one side of the base plate (1), and a translation mechanism (2) is provided on the other side of the base plate (1). The translation mechanism (2) is used to drive the fixed-distance transmission mechanism (4) to move closer to or farther away from the pull cylinder (3).

4. A hemming device for double-layer cuff sewing according to claim 3, characterized in that: The translation mechanism (2) comprises a second driving element (22) and a mounting plate (23), wherein the second driving element (22) is arranged on a side of the base plate (1) away from the pull cylinder (3), and the second driving element (22) is used to drive the mounting plate (23) to move closer to or away from the pull cylinder (3), and a fixed-distance transmission mechanism (4) is installed on the mounting plate (23).

5. A hemming device for double-layer cuff sewing according to claim 4, characterized in that: The pull cylinder (3) is arranged obliquely on the bottom plate (1), a first pad (21) is arranged on the bottom plate (1), the second driving element (22) is mounted on the first pad (21), and the first pad (21) makes the synchronous belt (46) parallel to the cloth in the pull cylinder (3).

6. A hemming device for sewing double-layer cuff edges according to claim 5, characterized in that: A second pad (33) is provided on the side of the bottom plate (1) away from the translation mechanism (2), and the pull cylinder (3) is mounted on the second pad (33).

7. A hemming device for double-layer cuff sewing according to claim 4, characterized in that: An adapter plate (42) is mounted on the mounting plate (23), and the first driving element (41) and the synchronous wheel (44) are both mounted on the adapter plate (42).

8. A hemming device for sewing double-layer cuff edges according to claim 7, characterized in that: The adapter plate (42) is L-shaped, and a synchronous wheel (44) is provided at least at two ends and a corner of the adapter plate (42), and the synchronous wheel (44) at one end of the adapter plate (42) is drivingly connected to the first driving element (41).

9. A hemming device for sewing double-layer cuff edges according to claim 7, characterized in that: A tensioning wheel (45) is also provided at the corner of the adapter plate (42).

10. A hemming device for double-layer cuff sewing according to claim 7, characterized in that: A vertical connecting plate (43) is provided on the adapting plate (42), and the connecting plate (43) is mounted on the mounting plate (23).

Images