KR102326271B1 - Fabric clamping apparatus for sewing - Google Patents

Abstract

The present invention relates to a fabric clamping device for sewing, which includes: a template installed on a work bench of a sewing machine, on which a fabric to be sewn is placed; and a plurality of clamping jigs installed spaced apart from each other at a predetermined position on the template, and clamping and pulling an edge of the fabric positioned on the template during operation. By automatically performing several operations at the same time to keep the fabric flat on the template, it is possible to reduce the number of workers and time, and it is possible to respond to various fabrics using a common template.

Description

Fabric clamping apparatus for sewing}

The present invention relates to a fabric fixing device for sewing for fixing a fabric or fabric to be sewn to a template.

In general, the environment for manufacturing clothes after industrialization is a method of sewing textiles by operating a sewing machine through manpower, and even in the case of mass production, a labor-intensive production method is mainly used. However, after the advancement of the automated mass production system, the development and utilization of various automated machinery to increase productivity is actively progressing. This is a developing and applied reality. In particular, in a mass production site equipped with a garment manufacturing industry, after fixing the fabric or fabric to be sewn on a template for sewing cloth or fabric, using a sewing machine, automatic or semi-automatic (worker) sewing is performed.

Here, the template acts as a frame for the position and pattern of sewing and the progress line, and fixes the fabric so that it can cope with the pushing and progress errors of the fabric that may be caused by the resistance force the fabric receives with respect to the speed and direction of the sewing machine. It plays a role in maintaining the shape of the fabric. In order to successfully and effectively perform the sewing process using such a template, the fabric should be configured to be positioned on the template, and tension should be applied to the entire fabric in the outward direction to proceed with the process without wrinkling or slipping. Specifically, when fixing the fabric to the template, the fabric is positioned on the template to match the pattern, and then the fabric is fixed using a fixing means such as a pin so that the fabric can be kept taut. Then, after fixing the template on which the fabric is fixed to the sewing machine workbench, the fabric is sewn with the sewing machine.

Here, in order to position the fabric on the template and keep it taut, one or two workers are required to pull the fabric in all directions. Moreover, for fabrics with additional fillers (cotton, feathers, etc.) inserted, such as winter clothing, it is necessary to secure performance such as preventing deformation of shape and volume and uniformity of distribution of fillers, so the importance of positioning and fixing the fabric is significant Since the difficulty of the work is very high, and the quality and productivity of the product are greatly affected according to the skill of the worker, it is essential to introduce a formal process technology and related equipment. In addition, depending on the type (design) of the fabric to be sewn, the fabric fixing pin is reinstalled on the template or a separate template is required.

On the other hand, recently, various fixing jigs for sewing have been developed to easily fix the fabric to be sewn, but these fixing jigs have the inconvenience of having to replace the jig according to the design of the fabric, and the work of pulling the fabric taut is still a worker There is still a problem that it takes a considerable amount of time to work.

Prior Art Document 1: Korean Patent Registration No. 10-2098703 (2020.04.10. Announcement)

Prior Art Document 2: Korean Patent Registration No. 10-2029589 (2019.10.08. Announcement)

The present invention was invented to solve the above problems, and it provides a fabric fixing device for sewing that can reduce the number of workers and time by automatically performing several operations at the same time to fix the fabric on a template and keep it flat. intended to provide

In addition, an object of the present invention is to provide a fabric fixing device for sewing that can respond to various fabrics using a common template.

In order to achieve the above object, the present invention is installed on the work table of the sewing machine, the template on which the sewing target fabric is placed; and a plurality of clamping jigs installed to be spaced apart from each other at predetermined positions on the template, and clamping and pulling the edge of the fabric positioned on the template during operation.

According to one embodiment, the clamping jig, the body made of a longitudinal member; a pair of clampers installed to face each other up and down on the front side of the main body and formed in an oval shape to be rotatable about a central axis, respectively; a pair of springs installed on the inner upper surface and the lower surface of the main body in a vertical direction, respectively, pressing the rear ends of the clampers located inside the main body in a vertical direction to open the front side of the pair of clampers; and a pneumatic or electric actuator installed movably in the horizontal direction on the rear side of the main body and pressing the rear ends of the pair of clampers in the horizontal direction to close the front sides of the pair of clampers characterized in that

Preferably, the pair of clampers are provided with serrated portions to face each other on the outer circumferential surface extending from the central axis to the front end, so that when the actuator is operated, it clamps and pulls the distal end located between the pair of clamps. do.

According to another embodiment, the clamping jig is made of a plate shape extending in the longitudinal direction, the lower clamper having a pair of supports extending in the vertical direction on both sides of the center, respectively; an upper clamper rotatably hinged between the pair of supports and selectively engaged with the lower clamper; and an actuating mechanism for rotating the upper clamper.

Here, the operating mechanism includes movable members for rotating the upper clamper and a pneumatic or electric actuator for moving the movable members, and the movable members are configured to engage with a locking protrusion formed on the rear upper portion of the upper clamper. a first movable member having a locking protrusion at a front end and having a shape increasing in thickness toward a rear side and having a cam surface formed on a surface facing the lower clamper; and a vertical bar positioned under the first movable member and extending in a vertical direction so that an upper end thereof is in contact with a cam surface of the first movable member and a horizontal bar extending in a horizontal direction in parallel with the lower clamper; and a second movable member horizontally moved on the lower clamper by operation.

Preferably, the upper clamper is formed of a triangular-shaped member that increases in thickness from the front side to the rear side when viewed from the side, and each of the lower surface of the upper clamper and the upper surface of the lower clamper is provided with serrated portions. do.

On the other hand, the clamping jig is characterized in that it is detachable on the template so that the position can be changed according to the design on the fabric.

The fabric fixing device for sewing according to the present invention can reduce the number of working people and time by automatically performing several operations at the same time to fix the fabric on the template and keep it flat.

In addition, the fabric fixing device for sewing according to the present invention allows the operator to change the installation position of the clamping jig without having to replace the template according to the design of the fabric, so that it is possible to respond to various fabric designs by using one template in common do.

1 is a perspective view schematically showing a fabric fixing device for sewing according to the present invention together with a sewing machine.
2 is a plan view showing a fabric fixing device for sewing according to the present invention.
Figure 3 is a side cross-sectional view schematically showing an example of the clamping jig of the fabric fixing device for sewing according to the present invention.
4A to 4C are views showing the clamping jig of FIG. 3 , FIG. 4A is a view showing a release state of the clamping jig, FIG. 4B is a view showing a fixed state of the clamping jig, and FIG. 4C is a view showing the clamping jig of the distal end It is a drawing showing the state of being fixed while pulling the fabric from both sides.
5A to 5C are views schematically showing another example of a clamping jig of a fabric fixing device for sewing according to the present invention, and FIG. 5A is a view showing a release state of the clamping jig, FIG. 5B is a clamping jig It is a view showing a first fixed state, and Figure 5c is a view showing a second fixed state of the clamping jig.

Hereinafter, a preferred embodiment of a fabric fixing device for sewing according to the present invention will be described with reference to the accompanying drawings. For reference, in describing the present invention below, terms referring to the components of the present invention are named in consideration of the function of each component, so it should not be construed as limiting the technical components of the present invention. will be

1 to 2, the sewing fabric fixing device according to the present invention is a device for spreading and fixing the fabric 10 to be sewn on the work table 21 of the sewing machine 20, the sewing machine 20 It includes a plurality of clamping jigs (clamping jig; 200) for clamping and pulling a template (100) installed on the work table (21) and the sewing target fabric 10 placed on the template (100).

The template 100 is a plate-shaped member that is detachably installed on the work bench 21 of the sewing machine 20 , and the fabric 10 to be sewn, that is, fabric is placed on the template 100 . This fabric 10 is placed on the template 100 by the manual operation of the operator.

The clamping jigs 200 are installed to be spaced apart from each other at predetermined positions on the template 100 . Specifically, the clamping jigs 200 are installed to surround the fabric 10 at the edge portion of the template 100, and clamp and pull the edge of the fabric 10 spread on the template 100 during operation. (10) serves as a fixing means to make it unfold taut.

Here, the clamping jig 200 may be detachably configured on the template 100 to change a position on the template 100 according to the design of the fabric 10 . Accordingly, the operator can change the installation position of the clamping jig 200 without replacing the template 100 according to the design of the fabric, so that it is possible to respond to various fabric designs by using one template in common.

Referring to FIG. 3 , each clamping jig 200 includes a body 210 , a pair of clampers 220 , a pair of springs 230 , and an actuator 240 .

The body 210 is a hollow member, and may have a cylindrical shape or a rectangular parallelepiped shape. An opening having a predetermined interval is provided in the front of the main body 210 (the part to which the fabric is fixed) so that a pair of clampers 220 are installed, and an actuator 240 is provided in the rear (opposite of the opening) of the main body 210 . Parts are provided for operation.

A pair of clampers 220 are installed to face each other up and down in the opening on the front side of the main body 210 . Each of the clampers 220 is made of an arc-shaped member extending long in the horizontal direction to be rotatable about the central axis 221 . In addition, half of the clamper 220 is disposed inside the main body 210 with respect to the central axis 221 , and the other half is exposed to the outside of the main body 210 .

A pair of springs 230 are installed to apply an elastic force in a vertical direction to the inner upper surface and lower surface of the main body 210 , respectively. This spring 230 presses the rear end of each clamper 220 located inside the main body 210 in the vertical direction so that the pair of clampers 220 can rotate symmetrically with each other about the horizontal axis. , so that the front side of the pair of clampers 220 exposed to the outside of the main body 210 can be opened. That is, the spring 230 applies an elastic force in the vertical direction so that the rear portions of the pair of clampers 220 rotate in a direction in which they engage with each other. Here, the front side of the clamper 220 exposed to the outside of the main body 210 is a part into which the sewing target fabric is inserted and clamped.

The actuator 240 is installed movably in the horizontal direction on the rear side of the main body 210 to simultaneously press the rear ends of the pair of clampers 220 in the horizontal direction. To this end, a pneumatic cylinder 250 for moving the actuator 240 in the horizontal direction may be installed on the rear side of the actuator 240 . Alternatively, a transmission device (not shown) for horizontally moving the actuator 240 may be used instead of the pneumatic cylinder 250 . Here, the actuator 240 includes a horizontal shaft 241 connected to a pneumatic cylinder or a transmission device and a pressing piece 242 having a predetermined thickness provided at the front end of the shaft 241 . And, the pressing piece 242 is made of a streamlined surface facing the pair of clampers 220, enters between the pair of clampers 220 by the operation of a pneumatic cylinder or a transmission device, and a pair of clampers ( 220 is in contact with the actuator 240 at the same time. When the actuator 240 contacts and pressurizes the rear ends of the clampers 220 at the same time, the pair of clampers 220 rotate while forming symmetry with each other. That is, the actuator 240 applies a force that allows the clamper 220 to rotate in a direction to compress the spring 230 against the elastic force of the spring 230 . Accordingly, the front side of the pair of clampers 220 may be closed to clamp the fabric.

Preferably, the pair of clampers 220 are provided with serrated portions 222 to face each other on the outer peripheral surface extending from the central axis 221 to the front end in the portion exposed to the outside of the main body 210 . . The sewing target fabric 10 is clamped between the sawtooth portions 222 . Here, when the actuator 240 operates and presses the rear end of the clampers 220, the sawtooth portions 222 facing each other are engaged and the pair of clampers 220 rotate while forming symmetry with each other. Accordingly, the distal end clamped between the sawtooth portions 222 may be pulled toward the rear side of the clamper 220 by rotation of the clampers 220 .

An operation example of the clamping jig 200 will be described with reference to FIGS. 4A to 4C . First, as shown in FIG. 4A , in a state in which the actuator 240 is not operated, the clampers 220 are in an open state on the front side by the elastic force of the spring 230 . At this time, the operator inserts the fabric 10 between the open clampers 220 . Then, as shown in Fig. 4b, when the actuator 240 operates, the pressing piece 242 of the actuator 240 enters between the pair of clampers 220 and rotates the clampers 220 in a symmetrical direction, Let the front side of the clampers 220 be closed. The distal end 10 is then clamped between the sawtooth portions 222 facing each other. At this time, since the clampers 220 are rotated in an elliptical shape, the clamped fabric 10 is further pulled toward the rear side of the clamping jig 200 . And, as shown in Fig. 4c, since the clamping jigs 200 are arranged to surround the edge of the fabric 10, the fabric 10 can be stretched by the clamping jigs 200 arranged to face each other. have.

In this way, in the fabric fixing device for sewing according to the present invention, the fabric is clamped by a pair of clampers 220 rotated by the actuator 240 and the fabric is pulled taut at the same time, so that the operator is on the template 100 There is no need to directly pull the fabric placed on the Therefore, the fabric fixing device for sewing according to the present invention can reduce the number of working people and time by automatically performing an operation for fixing the fabric on the template and keeping it flat.

5A to 5C , the fabric fixing device for sewing according to the present invention may include a clamping jig 300 having a different shape from the aforementioned clamping jig 200 . Specifically, the clamping jig 300 includes a lower clamper 310 , an upper clamper 320 selectively engaged with the lower clamper 310 , and an actuating mechanism for rotating the upper clamper 320 .

The lower clamper 310 is made of a plate-shaped member extending in the longitudinal direction, and has a pair of supports 311 extending in the vertical direction on both sides of the center, respectively. The upper clamper 320 is rotatably hinged between the pair of supports 311 to be selectively engaged with the lower clamper 310 . The upper clamper 320 is formed of a triangular-shaped member whose thickness increases from the front side to the rear side when viewed from the side, and has a locking protrusion 321 having a shape protruding toward the front at the rear upper portion. The actuating mechanism includes movable members 330 and 340 for rotating the upper clamper 320 and an actuator 350 for moving the movable members 330 and 340 . Here, the actuator 350 may be driven by a pneumatic or electric method like the actuator 240 described above. That is, the actuator 350 has a shaft shape movable in the horizontal direction by the pneumatic cylinder 360 or a transmission device.

The movable members 330 and 340 are divided into a first movable member 330 and a second movable member 340 . The first movable member 330 has a locking protrusion 331 at its front end to engage the locking protrusion 321 of the upper clamper 320 . In addition, the first movable member 330 has a shape that increases toward the rear when viewed from the side, and a cam surface 332 is formed on a bottom surface facing the lower clamper 310 . The second movable member 340 is positioned below the first movable member 330 , and includes a vertical bar 341 and a lower portion extending vertically so that the upper end contacts the cam surface 332 of the first movable member 330 . It includes a horizontal bar 342 extending in the horizontal direction in parallel with the clamper 310 . And, the rear side of the horizontal bar 342 is connected to the actuator 350 so that the second movable member 340 can move in the horizontal direction on the lower clamper 310 by the operation of the actuator 350 .

With this configuration, when the actuator 350 is operated, the vertical bar 341 slides into contact with the cam surface 332 of the first movable member 330 while the second movable member 340 moves to the rear side, so that the locking protrusion The first movable member 330 is rotated upwardly using the interlocked portion of the ones 321 and 331 as a rotation axis. Then, the locking protrusion 331 of the first movable member 330 presses the locking protrusion 321 of the upper clamper 320 to rotate the upper clamper 320 downward. Accordingly, the upper clamper 320 and the lower clamper 310 are engaged to clamp the fabric 10 inserted between the upper clamper 320 and the lower clamper 310 . Subsequently, when the actuator 350 is further operated to move the second movable member 340 further to the rear side, the lower clamper 310 moves to the rear side by the rearward movement of the second movable member 340 to hold the fabric. The entire clamping jig 300 being clamped is moved to the rear side. Accordingly, the fabric clamped by the clamping jig 300 may be pulled taut. Here, the horizontal bar 342 of the second movable member 340 is connected to the lower clamper 310 to be slidable only by a predetermined distance on the lower clamper 310 , so that the lower part is caused by the movement of the second movable member 340 . The clamper 310 and the clamping jig 300 including the clamper 310 can move backward as a whole.

Preferably, the lower surface of the upper clamper 320 and the upper surface of the lower clamper 310 are provided with sawtooth-shaped portions, respectively, so that the fabric 10 can be firmly clamped.

An operation example of the clamping jig 300 will be described with reference to FIGS. 5A to 5C . First, as shown in FIG. 5A , in a state in which the actuator 350 is not operated, the upper part by the engagement of the locking protrusion 331 of the first movable member 330 and the locking protrusion 321 of the upper clamper 320 is engaged. The clamper 320 and the lower clamper 310 maintain a spaced apart state from each other. In this state, the operator inserts the fabric 10 between the upper clamper 320 and the lower clamper 310 spaced apart. Subsequently, as shown in FIG. 5B , when the actuator 350 operates, the vertical bar 341 of the second movable member 340 moves backward while the horizontal bar 342 of the second movable member 340 moves backward. 1 It slides along the cam surface 332 of the movable member 330 . Then, as the first movable member 330 rotates upward, the locking protrusion 331 of the first movable member 330 presses the locking protrusion 321 of the upper clamper 320 so that the upper clamper 320 moves downward. By rotating, the upper clamper 320 and the lower clamper 310 are engaged with each other. Accordingly, the fabric is clamped to the clamping jig 300 . In this state, as shown in FIG. 5C , when the actuator 350 operates to further move the horizontal bar 342 of the second movable member 340 to the rear side, the second movable member 340 moves to the rear side. As a result, the lower clamper 310 moves to the rear side, so that the clamping jig 300 clamping the distal end moves to the rear as a whole. Then, since the clamping jigs 300 are arranged to surround the edge of the fabric 10 , the fabric 10 can be stretched out by the clamping jigs 300 arranged to face each other.

In this way, in the fabric fixing device for sewing according to the present invention, the upper clamper 320 and the lower clamper 320 are selectively engaged by the actuator 350, and the clamping jig 300 is horizontally moved to the rear side as a whole. Since the fabric is pulled taut at the same time as this clamping, there is no need for an operator to directly pull the fabric disposed on the template 100 . Therefore, the fabric fixing device for sewing according to the present invention can reduce the number of working people and time by automatically performing an operation for fixing the fabric on the template and keeping it flat.

The embodiments of the present invention described above are merely illustrative of the technical idea of the present invention, and the protection scope of the present invention should be interpreted by the following claims. In addition, various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. It should be interpreted as being included in the scope of rights.

10: fabric 20: sewing machine
21: workbench 100: template
200: clamping jig 210: body
220: clamper 221: central shaft
222: toothed portion 230: spring
240: actuator 241: shaft
242: press piece 250: pneumatic cylinder
300: clamping jig 310: lower clamper
311: support 320: upper clamper
321: locking protrusion 330: first movable member
331: locking projection 332: cam surface
340: second movable member 341: vertical bar
342: horizontal bar 350: actuator
360: pneumatic cylinder

Claims (7)

a template installed on the work bench of the sewing machine, on which the fabric to be sewn is placed; and
It includes a plurality of clamping jigs installed at a predetermined position on the template and spaced apart from each other and clamping and pulling the edge of the fabric positioned on the template during operation,
The clamping jig may include: a lower clamper having a plate shape extending in a longitudinal direction and having a pair of supports extending in a vertical direction on both sides of the center; an upper clamper rotatably hinged between the pair of supports and selectively engaged with the lower clamper; and an actuating mechanism for rotating the upper clamper,
The actuating mechanism includes: movable members for rotating the upper clamper; and a pneumatic or electric actuator for moving the movable members,
The movable members include:
a first movable member having a locking protrusion at its front end to engage with the locking protrusion formed on the rear upper portion of the upper clamper, the first movable member having a shape increasing in thickness toward the rear and having a cam surface formed on a surface facing the lower clamper; and
a vertical bar positioned under the first movable member and extending in a vertical direction so that an upper end thereof contacts a cam surface of the first movable member, and a horizontal bar extending in a horizontal direction in parallel with the lower clamper; Fabric fixing device for sewing, characterized in that it comprises a second movable member moving in the horizontal direction on the lower clamper by the.
According to claim 1,
The upper clamper is formed of a triangular-shaped member whose thickness increases from the front side to the rear side when viewed from the side, and the lower surface of the upper clamper and the upper surface of the lower clamper are each provided with serrated parts. Fabric for sewing fastening device.
According to claim 1,
The clamping jig is a fabric fixing device for sewing, characterized in that detachable on the template so that the position can be changed according to the design on the fabric. delete delete delete delete

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