CN218540010U

CN218540010U - Double circular seam cylinder table type sewing machine

Info

Publication number: CN218540010U
Application number: CN202222834155.8U
Authority: CN
Inventors: 吉川和志
Original assignee: Morimoto Seisakusho KK
Current assignee: Morimoto Seisakusho KK
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-02-28
Anticipated expiration: 2032-10-26

Abstract

The present application relates to a double circular seam cylinder table sewing machine (1) which uses a longitudinal pendulum looper. The sewing machine comprises a second transmission mechanism (4) for transmitting the movement of the main shaft (13) to the transmission shaft (15). The second transfer mechanism includes a transfer crank lever (41), a transfer link lever (42), and a transfer swing lever (43). The sewing machine further comprises a conveying amount adjusting mechanism (2) which is positioned at the rear side of the machine table part in the length direction than the second conveying mechanism. The conveying amount adjusting mechanism includes: a transmission adjusting rod shaft (21), wherein the transmission adjusting rod shaft (21) is arranged in parallel with the main shaft; a third transmission mechanism (5) which transmits the motion of the transmission adjusting rod shaft; and an adjusting rod (22) fixedly installed at a rear end of the transmission adjusting rod shaft, and changing an angle of the transmission adjusting rod shaft by moving, thereby changing an angle of the transmission shaft.

Description

Double circular seam cylinder table type sewing machine

Technical Field

The present application relates to the field of sewing machines, and more particularly, to a dual circular seam cylinder table type sewing machine.

Background

In a double circular sewing cylinder table type sewing machine using a longitudinal looper, it has been a big problem in the prior art how to perform a tight sewing, that is, to reduce the feed amount at the end of sewing to reduce the stitch length (as shown by C in fig. 1) and thus to prevent a thread slip.

As shown in fig. 2, in a double circular seam cylinder table type sewing machine using a pitch looper of the related art, there is a technique of changing an eccentric amount by a push button type feed amount adjusting mechanism 500 to change a cloth feed amount. However, the sewing machine shown in fig. 2 cannot change the cloth feed amount during continuous sewing, and thus there is no way to perform close sewing without interruption at the end stage of sewing.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a double circular sewing cylinder table type sewing machine using a longitudinal looper capable of performing close sewing at the sewing end stage.

In a first aspect of the present application, a double circular seam cylinder table type sewing machine using a longitudinal looper includes a table portion constituted by a main body table portion and a cylinder table portion, a main shaft, a transfer shaft arranged in parallel with the main shaft, and a feed dog. The cloth feeding dog is installed on a cloth feeding dog pedestal, a first pin of the cloth feeding dog pedestal is in pivot supporting connection with one end of an eccentric mechanism, the eccentric mechanism is externally embedded in a first eccentric wheel fixed on the main shaft, and a second pin of the cloth feeding dog pedestal is connected to the conveying shaft through a first conveying mechanism. The first transmission mechanism is inserted through and fixed on the transmission shaft, and the first transmission mechanism is rotatably connected with the second foot of the cloth feeding tooth table seat through a pin. The sewing machine further includes a second transfer mechanism that transfers the motion of the main shaft to the transfer shaft. The second transmission mechanism comprises a transmission crank rod, a transmission connecting rod and a transmission swing rod. One end of the transmission crank rod is externally embedded in a second eccentric wheel fixed on the main shaft, and the other end of the transmission crank rod is provided with a two-fork part. Two ends of the transmission connecting rod are respectively provided with a hole, one end of the transmission connecting rod is positioned between the two fork parts of the transmission crank rod, and a pin is inserted through the two fork parts of the transmission crank rod and the one end of the transmission connecting rod. The transmission swing rod is provided with a hole at one end, the transmission swing rod is inserted and fixed on the transmission shaft through the hole, the other end of the transmission swing rod is provided with a two-fork part, and the transmission connecting rod and the transmission swing rod are rotatably connected through a pin inserted through the hole in the two-fork part of the transmission swing rod and the hole at the other end of the transmission connecting rod. The sewing machine further includes a conveying amount adjusting mechanism located further on a rear side in a longitudinal direction of the table portion than the second conveying mechanism. The conveying amount adjusting mechanism includes: a conveyance adjustment lever shaft disposed parallel to the main shaft; a third transmission mechanism that transmits the motion of the transmission adjustment lever shaft; and an adjusting rod fixedly installed at a rear end of the transmission adjusting rod shaft, and changing an angle of the transmission adjusting rod shaft. The third transmission mechanism comprises a connecting rod and an adjusting handle, one end of the connecting rod is rotatably supported on a pin inserted through the transmission crank rod and the transmission connecting rod in a shaft supporting mode, the other end of the connecting rod is rotatably connected to a supporting shaft at one end of the adjusting handle, and the transmission adjusting rod is fixedly connected to the other end of the adjusting handle in a shaft supporting mode.

By adopting the structure, particularly the conveying amount adjusting mechanism, the movement of the feed dog can be adjusted in the working process of the sewing machine, so that the conveying amount can be adjusted, and the close sewing at the sewing finishing stage can be realized. Further, since the conveying amount adjusting mechanism is located further on the rear side in the longitudinal direction of the table portion than the second conveying mechanism, it is possible to avoid a large number of components included in the drum table portion and a large volume of the drum table portion.

A double circular seam cylinder table sewing machine of a second aspect of the present application is characterized in that, in the double circular seam cylinder table sewing machine of the first aspect, the adjusting lever is operated by an air cylinder or a foot pedal.

The amount of movement of the adjustment lever can be accurately controlled by using the air cylinder or the foot pedal, thereby achieving accurate control of the amount of adjustment.

A second aspect of the present invention is the double circular seam cylinder table type sewing machine according to the first aspect, wherein a scale plate is provided on a rear side of the adjustment lever, a circular arc window is formed in the scale plate, and stopper members are provided on both sides of the circular arc window, respectively, and restrict a movement range of the adjustment lever.

By arranging the scale plate with the arc-shaped window, the position of the adjusting rod can be visually confirmed, so that the conveying amount can be controlled more accurately. The provision of stop members on either side of the window can help prevent excessive movement of the adjustment lever.

A double circular seam cylinder table sewing machine according to a fourth aspect of the present application is the double circular seam cylinder table sewing machine according to the third aspect, wherein an upper stopper of the stopper members corresponds to a position at the time of normal sewing, and a lower stopper of the stopper members corresponds to a position at the time of tight sewing.

By making the upper stopper member of the stopper members correspond to a position at the time of normal sewing and the lower stopper member of the stopper members correspond to a position at the time of close sewing, it is possible to help control the conveying amount more accurately.

A double circular seam cylinder table type sewing machine according to a fifth aspect of the present application is characterized in that, in the double circular seam cylinder table type sewing machine according to the first to fourth aspects, a reset device is fixed to a table portion of the sewing machine, and the reset device is connected to the transfer adjustment lever shaft through a reset device connecting member.

Through this structure, can make the conveying regulating rod axle automatic re-setting to can adjust repeatedly.

A double circular seam cylinder table sewing machine of a sixth aspect of the present application is characterized in that in the double circular seam cylinder table sewing machine of the fifth aspect, the return means is a spring.

The spring is a common resetting device, has simple structure, good stability and lower cost, and is suitable for industrial application.

The double circular seam cylinder table type sewing machine of the seventh aspect of the present application is characterized in that, in the double circular seam cylinder table type sewing machine of the first to fourth aspects, the sewing machine further includes an automatic thread cutting device, and after sewing is completed, the automatic thread cutting device automatically cuts off an upper thread and a lower thread.

The structure can automatically cut off the upper thread and the lower thread after the sewing is finished.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate one embodiment of the application and together with the description, serve to explain the principles of the application. It will be apparent to those skilled in the art that other embodiments may be devised without the use of inventive faculty.

Fig. 1 shows a schematic view of a closed seam at the end stage of sewing.

FIG. 2 is a schematic view of a prior art double circular seam cylinder table type sewing machine using a pitch looper.

FIG. 3 is a schematic view of a double circular seam cylinder table sewing machine using a pitch looper of the present application.

Fig. 4 is a schematic top view of the sewing machine of the present application.

Fig. 5 is a perspective view of a transport mechanism of the sewing machine of the present application.

Fig. 6 is an exploded schematic view of a transport mechanism of the sewing machine of the present application.

Fig. 7 is an enlarged view of a portion a shown in fig. 6.

Fig. 8 is an enlarged view of a portion B shown in fig. 6.

Fig. 9 is a partial side view showing a sewing machine of the present application.

Detailed Description

Embodiments will now be described more fully with reference to the accompanying drawings.

FIG. 3 is a schematic view of a double circular seam cylinder table sewing machine 1 of the present application using a pitch looper. As shown in fig. 3, a sewing machine 1 of the present application includes a machine base portion including a sewing machine arm 10, a main body machine base portion 11, and a cylinder machine base portion 12, a main shaft 13, a feed dog 14, and a feed amount adjusting mechanism 2. In the present application, a side of the sewing machine 1 closer to the feed dog 14 in the longitudinal direction is referred to as a front side, and a side farther from the feed dog 14 is referred to as a rear side. The body table portion 11 is located on the rear side, and the cylinder table portion 12 is located on the front side. In comparison with the prior art shown in fig. 2, the sewing machine 1 of the present application is provided with a feed amount adjusting mechanism 2 instead of the push button type feed amount adjusting mechanism 500, and the feed amount adjusting mechanism 2 is provided at the rear side in the longitudinal direction of the sewing machine 1. By providing the feed amount adjusting mechanism 2 at the rear side in the longitudinal direction of the sewing machine 1, the number of components included in the cylinder table section 12 can be effectively reduced, and the cylinder table section 12 can be prevented from becoming large in volume, thereby reducing hindrance at the time of sewing.

Fig. 4 is a schematic top view of the sewing machine 1 of the present application. As shown in fig. 4, the transfer shaft 15 is disposed parallel to the main shaft 13 and the transfer adjustment lever shaft 21. The transmission shaft 15 and the transmission adjusting rod shaft 21 are respectively positioned at two sides of the main shaft 13 when viewed from the top.

Fig. 5 is a perspective view of the transfer mechanism of the sewing machine 1 of the present application. As shown in fig. 5, a conveyance amount adjustment mechanism 2 is formed on the rear side. The adjusting rod 22 is fixedly mounted on the rear end of the transmission adjusting rod shaft 21. A dial plate 23 and an air cylinder 24 are also fixed to the frame of the sewing machine 1. Wherein the adjustment rod 22 can be driven by an air cylinder 24. Of course, the adjustment lever 22 may also be actuated by other mechanisms known to those skilled in the art, such as a foot pedal. The scale plate 23 has an arc-shaped window 231, and the operator can easily confirm the position of the adjustment lever 22 through the arc-shaped window 231 and the scale marks on the side of the window.

Fig. 6 is an exploded schematic view of the conveyance mechanism of the sewing machine 1 of the present application. For convenience of explanation, a portion shown in a and a portion shown in B in fig. 6 will be described in detail as fig. 7 and 8, respectively.

Fig. 7 is an enlarged view of a portion a shown in fig. 6. As shown in fig. 7, the feed dog 14 is fixed to a feed dog stand 17 by a mount 16. Of course, the feed dog 14 may be directly fixed to the feed dog bed 17, which is not particularly limited. The first leg 171 of the feed dog abutment 17 is pivotally connected to the eccentric mechanism 18. The eccentric mechanism 18 is coupled to the main shaft 13 by being fitted over a first eccentric 19 fixed to the main shaft 13. Thus, the feed dog base 17 and the feed dog 14 are moved up and down by the first eccentric wheel 19 and the eccentric mechanism 18 in accordance with the rotation of the main shaft 13. The hole of the second leg 172 of the feed dog base 17 is rotatably connected to the first transfer mechanism 3 by inserting the pin 31. The first transfer mechanism 3 is inserted and fixed by the transfer shaft 15, and swings as the transfer shaft 15 swings right and left, and the feed dog base 17 and the feed dog 14 also swing. Thereby synthesizing an elliptical motion of the feed dog 14 by the above motion.

Fig. 8 is an enlarged view of a portion B shown in fig. 6. As shown in fig. 8, the movement of the main shaft 13 is transmitted to the transmission shaft 15 through the second transmission mechanism 4 including the transmission crank lever 41, the transmission connecting rod 42, and the transmission swing lever 43.

The transfer crank shaft 41 is externally fitted on a second eccentric 45 fixed to the main shaft 13 through a bearing 44, whereby the transfer crank shaft 41 reciprocates when the main shaft 13 rotates. The other end of the transmission crank lever 41 is formed with a bifurcated portion 411, and the bifurcated portion 411 has a hole formed therein.

The transfer link 42 has holes formed at both ends thereof. One end of the transfer link 42 is disposed between the two-forked portions 411 of the transfer crank lever 41, and a pin 412 is inserted through the two-forked portions 411 of the transfer crank lever 41 and one end of the transfer link 42. The other end of the transfer link 42 extends between the two forks 431 of the transfer lever 43, and a pin 432 is inserted through the two forks 431 of the transfer lever 43 and the other end of the transfer link 42.

The transfer swing lever 43 is inserted and fixed by the transfer shaft 15.

With the above structure, the rotation of the main shaft 13 is transmitted to the transmission shaft 15 through the second transmission mechanism 4, so that the transmission shaft 15 is swung. Then, the feed dog table 17 and the feed dog 14 perform an elliptical motion by the main shaft 13 and the transfer shaft 15.

The sewing machine 1 further includes the conveying amount adjusting mechanism 2, and as described above, the conveying amount adjusting mechanism 2 is located more on the rear side in the longitudinal direction of the table portion than the second conveying mechanism 4. The conveyance amount adjustment mechanism 2 includes a conveyance adjustment lever shaft 21 provided in parallel with the main shaft 13.

The movement of the transmission adjusting lever shaft 21 is transmitted by the third transmission mechanism 5 comprising the connecting rod 51 and the adjusting handle 52. As shown in fig. 8, one end of the link 51 is rotatably supported by a pin 412 through which the transmission crank lever 41 and the transmission connecting lever 42 are inserted. The other end of the link 51 is rotatably connected to a support shaft 521 at one end of the adjustment lever 52. The conveyance adjusting lever shaft 21 is fixed to the other end of the adjusting handle 52.

The adjustment lever 22 is fixedly mounted on the rear end portion of the conveyance adjustment lever shaft 21, and when the adjustment lever 22 is rotated, the conveyance adjustment lever shaft 21 is also rotated, and in turn, the adjustment lever 52 is rotated, so that the relative position of the fulcrum 521 with respect to the conveyance crank shaft 41 is changed. Accordingly, the inclination angle of the link 51 with respect to the horizontal plane is changed. Therefore, when the adjustment lever 22 is rotated, the rotation locus of the link 51 changes, changing the locus of the reciprocating motion of the transmission crank lever 41. Further, by changing the locus of the reciprocating motion of the transfer crank lever 41, the amount of movement of the transfer link lever 42 in the left-right direction can be changed, and the swing angle of the transfer shaft 15 fitted and fixed to the transfer lever 43 about the axis can be changed. As can be seen from the above process, when the adjustment lever 22 is rotated, the swing angle of the transfer shaft 15 can be changed, whereby swing adjustment of the feed dog bed 17 and the feed dog 14, that is, adjustment of the feed amount can be achieved, thereby achieving close sewing at the sewing end stage.

As shown in fig. 8, one end of a spring 46 as a return means is connected to a fixing piece 47 fixed to the machine base. The other end of the spring 46 is connected to a return device connection 48 passing through the transfer adjustment lever shaft 21. The reset means, due to its tendency to reset, can assist in resetting the rotated transfer adjust lever shaft 21.

As shown in fig. 9,

stopper members

232a and 232b are provided on both sides of the circular arc-shaped window 231 of the scale plate 23, respectively, to limit the movement range of the adjustment lever 22. For example, when the adjustment lever 22 is moved to the upper stopper 232a of the stoppers, the feed amount at this time corresponds to the feed amount at the time of normal sewing, and when the adjustment lever 22 is moved to the lower stopper 232b of the stoppers, the feed amount at this time corresponds to the feed amount at the time of tight sewing. The cloth feeding amount during sewing is usually larger than that during close sewing.

In addition, when the sewing is finished, the upper thread and the lower thread can be automatically cut off by an automatic thread cutting device. For example, the contents of japanese patent application laid-open No. 10-108990 may be referred to for this automatic thread cutting device, and details thereof are not repeated herein.

It is to be understood that the application is not limited to the details of construction, the arrangements of the drawings, or the manner of implementation that have been set forth herein, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A double circular seam cylinder table type sewing machine uses a longitudinal and transverse curved needle, which is characterized in that,

the sewing machine comprises a machine table part consisting of a body machine table part and a cylinder machine table part, a main shaft, a conveying shaft arranged in parallel with the main shaft and a cloth feeding tooth,

the feed dog is arranged on a feed dog pedestal, a first pin of the feed dog pedestal is in pivot supporting connection with one end of an eccentric mechanism, the eccentric mechanism is externally embedded in a first eccentric wheel fixed on the main shaft, a second pin of the feed dog pedestal is connected to the conveying shaft through a first conveying mechanism,

the first transmission mechanism is inserted and fixed on the transmission shaft, the first transmission mechanism is rotatably connected with the second foot of the feed dog seat through a pin,

the sewing machine further comprises a second transmission mechanism which transmits the motion of the main shaft to the transmission shaft,

the second transmission mechanism comprises a transmission crank rod, a transmission connecting rod and a transmission swing rod,

one end of the transmission crank rod is externally embedded in a second eccentric wheel fixed on the main shaft, the other end of the transmission crank rod is provided with a two-fork part,

holes are respectively formed at both ends of the transmission connecting rod, one end of the transmission connecting rod is positioned between the two fork parts of the transmission crank rod, a pin is inserted through the two fork parts of the transmission crank rod and the one end of the transmission connecting rod,

a hole is formed at one end of the transmission swing rod, the transmission swing rod is inserted and fixed on the transmission shaft through the hole, a two-fork part is formed at the other end of the transmission swing rod, a pin is inserted through the hole in the two-fork part of the transmission swing rod and the hole at the other end of the transmission connecting rod, so that the transmission connecting rod and the transmission swing rod can be rotatably connected,

the sewing machine further includes a conveying amount adjusting mechanism located further on a rear side in a longitudinal direction of the table portion than the second conveying mechanism,

the conveying amount adjusting mechanism includes:

a transport adjustment lever shaft disposed parallel to the main shaft,

a third transmission mechanism that transmits the motion of the transmission adjustment lever shaft, an

A regulating rod fixedly installed at a rear end portion of the transfer regulating rod shaft to change an angle of the transfer regulating rod shaft,

the third transmission mechanism comprises a connecting rod and an adjusting handle, one end of the connecting rod is rotatably supported on a pin inserted through the transmission crank rod and the transmission connecting rod in a shaft supporting mode, the other end of the connecting rod is rotatably connected to a supporting shaft at one end of the adjusting handle, and the transmission adjusting rod is fixedly connected to the other end of the adjusting handle in a shaft supporting mode.

2. The dual circular seam cylinder table sewing machine of claim 1 wherein the adjustment lever is operated by an air cylinder or a foot pedal.

3. The dual-circular-seam cylinder table type sewing machine of claim 2, wherein a scale plate is provided at a rear side of the adjusting lever, the scale plate having a circular-arc window formed therein, and stop members provided at both sides of the circular-arc window, respectively, the stop members limiting a movement range of the adjusting lever.

4. The dual circular seam cylinder table sewing machine of claim 3, wherein an upper one of the stop members corresponds to a position at the time of normal sewing, and a lower one of the stop members corresponds to a position at the time of close sewing.

5. The dual circular seam cylinder table sewing machine of any of claims 1-4, wherein a reset device is secured to the table portion of the sewing machine, the reset device being coupled to the feed adjustment lever shaft by a reset device coupling.

6. The dual-lockstitch cylinder table sewing machine of claim 5, wherein the return device is a spring.

7. The dual ring seam cylinder table sewing machine of any of claims 1-4 further comprising an automatic thread cutting device that automatically severs the upper and lower threads after sewing is complete.