CN107587275B

CN107587275B - Sewing device

Info

Publication number: CN107587275B
Application number: CN201710929045.0A
Authority: CN
Inventors: 施益明; 郁慧超
Original assignee: Shanghai Yuyi Machinery Equipment Co ltd
Current assignee: Shanghai Yuyi Machinery Equipment Co ltd
Priority date: 2017-10-09
Filing date: 2017-10-09
Publication date: 2024-03-26
Anticipated expiration: 2037-10-09
Also published as: CN107587275A

Abstract

The invention discloses a sewing device, which comprises a frame, a sewing machine supported on the frame, and a tension mechanism positioned on the feeding side of the sewing machine and used for enabling a sewing edge of a material to be sewn to have a certain pretightening force. The sewing device can ensure the pretightening force of the sewing edge in the sewing process, so that the sewing edge can be always aligned, and the sewing cost is reduced.

Description

Sewing device

Technical Field

The invention relates to the field of sewing machines, in particular to a sewing device with a back tension mechanism.

Background

When a sewing machine is used for sewing long threads (such as curtains, beds and the like), the length of a single sewing thread reaches more than 2.5 meters in the processes of splicing and hemming, and the condition of irregular sewing finally occurs by a common sewing method, if the sewing machine is pulled by a person at the back, two persons are needed for sewing one thread, and the labor cost is doubled. And the continuous and consistent tension cannot be maintained, and uneven sewing tension can occur. When large articles such as curtains and beds are sewn, due to heavy fabric, a sewing worker can take a lot of labor and effort when moving and stacking the fabric, and the labor intensity is high.

Disclosure of Invention

The invention mainly aims to provide a sewing device, which realizes the alignment of two belts of sewing cloth on one sewing side by replacing manual work by a back tension mechanism, thereby reducing the manual labor, lowering the sewing cost, ensuring the alignment stability and improving the sewing quality.

In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a sewing device, its characterized in that includes frame, support in the sewing machine of frame and be located the tension mechanism that is used for making the seam limit of waiting to sew up the material have certain pretightning force of feeding side of sewing machine, tension mechanism includes along the guide rail that the feeding direction supported on the frame and the clamping mechanism that is used for pressing from both sides tight seam limit of slidable setting on the guide rail one end.

Preferably, the guide rail is provided with a synchronous belt connected with the clamping mechanism, and the synchronous belt can drive the clamping mechanism to move in the feeding direction.

Preferably, the clamping mechanism comprises a sliding block matched with the guide rail, a bottom plate for fixing the sliding block, a fixed block for fixing the bottom plate and a movable block which is fixed on the bottom plate and can move up and down, and a part of the movable block is positioned right above the fixed block.

Preferably, an air cylinder with an air cylinder rod facing upwards is arranged on the bottom plate, and the air cylinder rod is fixedly connected with the moving block.

Preferably, the movable block is connected to the bottom plate through a connecting block, a clamping sliding rail vertically arranged is arranged on the bottom plate, and a sliding groove matched with the clamping sliding rail is arranged on the connecting block.

Preferably, the sewing machine further comprises a supporting plate arranged on the feeding side of the sewing machine, and a slit for the moving block and the fixed block to pass through in the feeding direction is formed in the supporting plate.

Preferably, the upper surface of the support plate is aligned with the working plane of the sewing machine.

Preferably, a conveyor belt is provided on one side of the support plate, seen in the feed direction, the upper surface of said conveyor belt being aligned with the upper surface of the support plate.

Compared with the prior art, the invention has the following beneficial effects:

the sewing device is provided with the tension mechanism, when a longer cloth is sewn, one end of a sewn part of the cloth is fixed on the feeding mechanism of the sewing machine, the other end of the sewn part of the cloth is fixed on the tension mechanism, so that the sewn part of the cloth has a certain pretightening force, and the pretightening force is kept unchanged or changed slightly in the sewing process, so that the two sewing edges can be always aligned; meanwhile, labor is saved, and sewing cost is reduced.

Drawings

FIGS. 1 and 2 are perspective views of a preferred embodiment according to the present invention;

FIG. 3 is a mating view of a rail and clamping mechanism in accordance with a preferred embodiment of the present invention;

fig. 4 is an enlarged view at a according to a preferred embodiment of the present invention.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.

A sewing device as claimed in figures 1 to 4 comprising a frame 11, a sewing machine 1 supported on the frame 11, a tensioning mechanism located on the feed side of the sewing machine 1. The tension mechanism is used for aligning the sewing edges of two fabrics to be sewn and has a certain pretightening force (tension), and the two sewing edges are always aligned before sewing by the pretightening force.

Specifically, the tension mechanism includes a guide rail 6 supported on the frame 11 along the feeding direction, a slider 61 engaged with the guide rail 6, and a clamping mechanism 7 fixed to the slider 61, the slider 61 being slidable along the feeding direction relative to the guide rail 6, the clamping mechanism 7 being capable of clamping the end of the cloth to be sewn.

In order to realize the automatic sliding of slider 61, be provided with on guide rail 6 along the hold-in range 8 of feed direction setting, hold-in range 8 and slider 61 fixed connection are provided with torque motor 5 in the one end of keeping away from sewing machine 1 of guide rail 6, torque motor 5's output shaft and hold-in range 8 transmission are connected and then can drive hold-in range 8 and remove.

The clamping mechanism 7 comprises a bottom plate 71 fixed on the slide block 61, a fixed block 72 fixed on the bottom plate 71 and a moving block 73 fixed on the bottom plate 71 in a vertically movable manner, wherein part of the moving block 73 is positioned right above the fixed block 72 so as to clamp or unclamp cloth when the moving block 73 moves vertically.

Specifically, the moving block 73 is supported on the bottom plate 71 through a connecting block 74 in a manner of being capable of moving up and down, a clamping sliding rail 75 extending up and down is provided on the bottom plate 71, a sliding groove (not shown) matched with the clamping sliding block 75 is provided on the connecting block 74, and stability of the moving block 73 in moving up and down can be ensured through the matching of the clamping sliding rail 75 and the sliding groove.

Further, an air cylinder 76 having an air cylinder rod disposed upward is provided on the bottom plate 71, and the air cylinder rod is fixedly connected to the connection block 74, so that the cloth can be clamped or unclamped by the expansion and contraction of the air cylinder 76.

The torque motor 5 and the cylinder 76 are both in signal connection with a controller. The moving block 73 is provided with two switch buttons connected with a controller in a signal manner, wherein one switch button is used for controlling the air cylinder 76 so as to control the clamping and the loosening, the other switch button is used for controlling the starting and the closing of the torque motor 5, and the two switch buttons are mainly used for facilitating the clamping and the starting of the torque motor 5. When the cloth is aligned manually, the cloth is placed in the clamping mechanism 7, clamping is realized by directly pressing a switch button, and starting of the torque motor 5 is realized by pressing another switch button.

A position sensor 77 is provided at one end of the guide rail 6 near the sewing machine 1, which is in signal connection with a controller, and when the clamping mechanism 7 moves to a position where the position sensor 77 is located, the controller controls the torque motor 5 to stop, and a cylinder rod of the cylinder 76 protrudes upward to loosen cloth.

Further, in order to support the cloth, a support plate 4 is provided above the guide rail 6, and an upper surface of the support plate 4 is leveled with an upper surface of a work platform of the sewing machine 1. And, be provided with slit 42 in the position department that corresponds with clamping mechanism 7 on backup pad 4, the upper end of movable block 73 and fixed block 72 passes slit 42 and is located the top of backup pad 4, and clamping mechanism 7's other part is located the below of backup pad 4, can carry out certain support to the cloth like this, makes things convenient for operating personnel to operate, avoids cloth and other structure contact and then the dirty cloth, has also guaranteed the safety of operation simultaneously.

Further, when the cloth is large, in order to enable the cloth that does not need to be sewn to move together without affecting the cloth at the sewn place, a conveyor belt 3 is provided on one side of the support plate 4, the upper surface of the conveyor belt 3 is aligned with the upper surface of the support plate 4, and the driving direction of the conveyor belt 4 coincides with the feeding direction. The frame 11 is provided with a motor 9 in transmission connection with the conveyor belt 4, the motor 9 is in signal connection with a controller, and the movement and the speed of the movement of the conveyor belt can be controlled through the controller. The movement of the timing belt 8 and the conveyor belt 3 are of the prior art and will not be described in detail here.

The sewing machine 1 is provided with a display screen 2 connected with a controller in a signal mode, the display screen 2 can set the cloth feeding speed of a torque motor 5, a motor 9 and a cloth feeding mechanism of the sewing machine, synchronous feeding of cloth can be achieved, and the fact that the cloth can be aligned all the time at a sewing position is guaranteed. The cloth feeding of the sewing machine belongs to the prior art and is not described in detail here. Because the cloth feeding mechanism clamps the cloth, the cloth feeding mechanism and the clamping mechanism can ensure that the cloth has a certain pretightening force to realize alignment. Meanwhile, buttons in the display screen 2 can also control the torque motor 5, the motor 9, a cloth feeding mechanism of the sewing machine and the air cylinder 76.

In use, one end of the sewing position of the cloth is aligned and fixed in the cloth feeding mechanism of the sewing machine 1, then the other end is aligned and the corresponding position of the clamping mechanism 7 is moved to clamp the other end of the sewing position of the cloth, a certain pretightening force is generated between the two ends of the cloth, then the sewing machine 1, the torque motor 5 and the motor 9 are started, when the clamping mechanism 7 moves to the position of the position sensor 77, the controller controls the torque motor 5 to stop, the air cylinder 76 is loosened, and the sewing machine continues to operate until all the tail ends of the sewing position of the cloth are completely sewn. Due to the adoption of the torque motor 5, the pretightening force on the sewing edge of the cloth can be kept unchanged or changed in a certain range, and the sewing edge can be kept aligned all the time.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The sewing device is characterized by comprising a frame, a sewing machine supported on the frame and a tension mechanism positioned on the feeding side of the sewing machine and used for enabling a sewing edge of a material to be sewn to have a certain pretightening force, wherein the tension mechanism comprises a guide rail supported on the frame along the feeding direction and a clamping mechanism slidably arranged on one end of the guide rail and used for clamping the sewing edge;

the clamping mechanism comprises a sliding block matched with the guide rail, a bottom plate for fixing the sliding block, a fixed block for fixing the bottom plate and a movable block which is fixed on the bottom plate and can move up and down, and a part of the movable block is positioned right above the fixed block;

the sewing device further comprises a supporting plate arranged on the frame and located on the feeding side of the sewing machine, and slits for the moving block and the fixed block to pass through in the feeding direction are formed in the supporting plate.

2. The sewing apparatus of claim 1, wherein the guide rail is provided with a timing belt coupled to the clamping mechanism, the timing belt being capable of driving the clamping mechanism to move in the feed direction.

3. A sewing apparatus as claimed in claim 2, wherein an upward-facing cylinder is provided on the base plate, and the cylinder rod is fixedly connected to the moving block.

4. A sewing apparatus as claimed in claim 1, wherein the movable block is connected to the base plate via a connecting block, a vertically arranged clamping rail is provided on the base plate, and a chute is provided on the connecting block which cooperates with the clamping rail.

5. A sewing apparatus as defined in claim 1, wherein the upper surface of the support plate is aligned with a work plane of the sewing machine.

6. A sewing apparatus as claimed in claim 1, wherein a conveyor belt is provided on one side of the support plate, as seen in the feed direction, the upper surface of the conveyor belt being aligned with the upper surface of the support plate.