JPH088775Y2 - Machine for adjusting the amount of sewing machine included - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to a device for adjusting the amount of insertion of a sewing machine in a sewing machine capable of sewing with a sewing machine.

(Prior Art) In a vertical feed sewing machine, the upper feed is fed more than the lower feed to sew the upper fabric so that the upper fabric is gathered.

Conventionally, Japanese Patent Laid-Open No. 64-83295 proposes a device for adjusting the amount of insertion of a sewing machine. However, this does not limit the setting of the amount of insertion of the sewing machine to a fixed amount, and it is possible to set it in multiple stages. As a feature, it is described that it divides into several stages like the case of sewing sleeves and body and improves work efficiency in the sewing process that requires false stitching,
It is possible to sew continuously only by setting the amount of false insertion in two steps.
In order to set in multiple stages, it is necessary to stop the sewing machine once during sewing, perform manual dial adjustment, and continue sewing after changing the setting value of the amount of insertion.

(Problems to be solved by the invention) In the above-mentioned conventional device, it takes time to manually adjust the dial, and the amount of insertion cannot be set quickly and surely.
There is a drawback that the production efficiency and the quality of sewn products are deteriorated. In addition, the operation noise is generated from the stopper part where the metal collides with each other at the time of the false insertion operation, which gives noise to the operator and the number of component parts is large Also, there were problems such as difficult maintenance.

In the present invention, in a vertical feed sewing machine that performs false stitching by making the upper feed amount larger than the lower feed amount, the position of the stopper that restricts the momentum of the solenoid that is the starting means when performing false stitch sewing is set to the stepping motor, pulse By varying the position of a motor or the like capable of detecting the position, the amount of misalignment can be arbitrarily adjusted.

[Constitution of device]

(Means for Solving the Problems) For this reason, the present invention is directed to an upper feed adjustment that adjusts the swing width of the upper feed arm fixed to the upper feed shaft to adjust the horizontal momentum of the upper feed dog that follows the upper feed shaft. A lever, a starting means for setting the upper feed adjusting lever to the insertion position, a cable having one end supported by the sewing machine main body and being bent and the other end being supported at a fixed position close to the starting means, and one end for the upper feed A sewing machine having a wire connected to an adjusting lever, the middle of which is loosely fitted in a cable, and the other end of which is locked to a starting means, wherein the upper feed momentum can be increased or decreased by operating the starting means. A stopper that is movably supported by a position-detectable motor is provided at a position facing
This is a means for solving the problem.

(Operation) The upper feed adjusting lever is rotated about the shaft as a fulcrum to change the swing width of the upper feed arm connected to the upper feed shaft to convert the upper feed amount. When the desired upper feed amount is set, the stopper position is set by inputting a signal of the current stopper position to the control circuit and rotating the motor capable of detecting the position via the drive circuit. Next, when the sewing operation is started and it is necessary to perform false stitching, by activating the activation means, the wire whose other end is locked by the activation means is pulled by an amount corresponding to the momentum, and the upper feed adjusting lever is rotated. The oscillating width of the upper feed arm is increased, and the upper feed amount is increased to cause a difference between the upper and lower feed amounts, thereby enabling false stitching.

(Embodiment) The present invention will be described below with reference to embodiments of the drawings.
4 to 4 show an embodiment of the present invention. First of all, referring to FIG. 4, a description will be given of the insertion (the operation of converting the upper feed amount by the rotation of the upper feed adjustment lever 1). Reference numeral 1 denotes an upper feed adjustment lever which swings around the shaft 2 in the direction of arrow C. It is connected via a link 5 to an upper feed lever 7 that rotates about a shaft 8. 24 is an upper feed arm whose one end is fixed to the upper feed shaft 25 and whose other end is connected to a feed adjuster 29 via intermediate links 23a and 23b. An upper feed rod 27 is connected to an eccentric cam 28 that rotates by an upper shaft 26, and one end of the upper feed rod is supported by the other ends of the intermediate links 23a and 23b so as to float with respect to each other. When the upper shaft 26 rotates, the operation of the upper feed rod 27 that follows the eccentric cam 28 swings the upper feed arm 24 in the direction of arrow D via the intermediate link 23a. As a result, the upper feed shaft 25 is driven to rotate, and the upper feed tooth (not shown) that follows the upper feed shaft 25 makes a horizontal reciprocating motion to perform the upper feed.

By the way, the intermediate shaft 23b and the floating shaft fulcrum 23c of the upper feed rod 27 are linked to the feed adjuster 29 via the intermediate link 23b. Therefore, when the upper feed adjusting lever 1 swings in the direction of arrow C, the floating shaft fulcrum 23c moves in the direction of arrow E.
Rocks in the direction. Therefore, the operation of the upper feed rod 27 is restricted, and the swing width of the upper feed arm 24 changes. That is, as the upper feed adjusting lever 1 rotates clockwise about the shaft 2,
The swing width of the upper feed arm 24 increases, and the amount of upper feed by the upper feed tooth increases. This allows false sewing.

Next, referring to FIG. 1, an explanation will be given of an embodiment of the device for adjusting the amount of insertion of the present invention. An upper feed adjusting lever 1 pivotally supported on a shaft 2
Has a display piece 1a and a protrusion 1b, and has a first wire end 3 rotatably supported by a step screw 3a and an upper feed link 5 rotatably supported by a step screw 5a. Reference numeral 4 denotes an upper feed adjusting portion, and a dial 4a having an eccentric cam portion (not shown) which is rotatably supported by a lever 4d by a step screw 4e,
A pin 4b, one end of which contacts and presses the eccentric cam part, and the other end of which contacts and presses the protrusion 1b of the upper feed adjusting lever 1, and the pin 4b.
It is composed of a spring hook 4c that locks one end of a spring 6 for pressing. The other end of the upper feed link 5 is attached to the upper feed lever 7 fixed to the upper feed adjusting lever shaft 8 by a step screw 5b.
It is rotatably supported by. The other end of the spring 6 is locked to the pin 5c of the upper feed link 5. 9 has one end attached to the first wire end 3, and the other end has a stepped screw on an operating arm 13 fixed to a solenoid 12 described later.
The wire is fixed to the second wire end 14 rotatably supported by 14a with a nut 9a. This wire has one end fixed to the first cable end 11 fixed to the sewing machine main body F with the nut 10a, and the other end fixed to the second cable end 15 arranged on the lower surface of the sewing machine table T with the nut 10b. The cable 10 is loosely fitted inside. Solenoid 12
Is fixed to a bracket 16 arranged on the lower surface of the table T.

Reference numeral 17 is a stepping motor arranged at a position facing the operating arm 13 and is attached to the lower surface of the table T by a bracket 18. Shaft part 17 of stepping motor 17
A stopper 19 having a male screw portion and a female screw portion corresponding to the a is arranged on the same line as the stepping motor 17, and is provided with an arrow B along a guide 20 attached to the lower surface of the table T. A cushioning material 21 is attached to the tip of the stopper 19 which is movable in the direction. twenty two
Is a position detecting sensor for detecting the position of the stopper 19, and is attached to the bracket 18.

2 shows brackets 16 and 18, second cable end 1
5 shows the arrangement in which the guide 20 is attached to the rear lower surface of the table T. Further, FIG. 3 shows a circuit configuration for driving and controlling the stepping motor 17 according to a known technique.

Next, the operation will be described. When the dial 4a of the upper feed adjusting section 4 is rotated in the direction of arrow A, the contact pin 4b abuts on the protrusion 1b of the upper feed adjusting lever 1 to rotate the upper feed adjusting lever 1 about the shaft 2 as a fulcrum, and The swing amount of the upper feed arm 24 connected to the upper feed shaft 25 in FIG. 4 is changed to convert the upper feed amount. The conversion of the upper feed amount is performed by rotating the dial 4a while watching the indicated value on the display piece 1a of the upper feed adjusting lever 1. On the other hand, for setting the position of the stopper 19, when the desired upper feed amount is set by a selection switch (not shown) of the operation unit of the stepping motor 17, the upper feed amount change signal and the signal for the current stopper position are output from the position detection sensor 22. It is input to the control circuit and is performed by the rotation of the motor 17 via the drive circuit, and the stopper 19 moves along the guide 20 to set it at a desired position.

Next, when the sewing operation is started and it is necessary to carry out the false stitching, the worker on the worker side W activates the solenoid 12. Therefore, the operating arm 13 of the solenoid 12 rotates until it comes into contact with the cushioning material 21 at the tip of the stopper 19, the wire 9 is pulled by an amount corresponding to the momentum, and the upper feed adjusting lever 1 rotates about the shaft 2 as a fulcrum. When the upper feed arm 24 moves, the swing width of the upper feed arm 24 increases, and the upper feed amount increases, which causes a difference in the upper and lower feed amounts, enabling the false stitching.

[Effect of device]

As described in detail above, the present invention is configured, and the amount of insertion is set by changing the motor whose position can be detected by operating the switch. Therefore, quick and easy fine adjustment is possible. Further, in the present invention, the number of constituent parts is small, assembly and maintenance are easy, and by providing a cushioning material on the stopper portion, the noise caused by the false operation can be reduced.

In addition, since the present invention is provided with the activation means on the rear side of the table, it is safe because it does not disturb the work and the operator does not touch it under normal conditions, and the space before and after the table is secured. Other peripheral devices (auxiliary table, presser foot lifting solenoid, etc.) can be easily installed.
Further, since the activation means is located at a position away from the worker, the worker is not so concerned about the effect.

[Brief description of drawings]

FIG. 1 is a front view of a device for adjusting the amount of insertion of an embodiment of the present invention, FIG. 2 is a perspective view showing an arrangement position of the adjusting device, and FIG. 3 is a position of a stopper which regulates an upper feed momentum. Block diagram showing the drive circuit and control circuit of the motor
FIG. 4 is a schematic view showing a link mechanism for explaining the false stitching. Description of the main parts of the figure 1 ... Top feed adjustment lever, 2 ... Shaft 4 ... Top feed adjustment part, 5 ... Top feed link 6 ... Spring, 7 ... Top feed lever 8 ... Top feed adjustment lever Axis, 9 ... Wire 10 ... Cable, 12 ... Solenoid 13 ... Actuating arm (starting means) 17 ... Stepping motor (motor capable of detecting position) 19 ... Stoppers 23a, 23b ... Intermediate link, 24 …… Upper feed arm 25 …… Upper feed shaft, 26 …… Upper shaft 27 …… Upper feed rod, 28 …… Eccentric cam

Claims (2)

[Scope of utility model registration request] 1. An upper feed adjusting lever for adjusting the swing width of an upper feed arm fixed to an upper feed shaft to adjust a horizontal momentum of an upper feed tooth following the upper feed shaft, and an upper feed adjusting lever Starting means for setting to the retracted position, a cable with one end supported by the sewing machine body and bent and the other end supported at a fixed position close to the starting means, one end connected to the upper feed adjustment lever, and the middle part in the cable In a sewing machine having a wire that is loosely fitted and has the other end locked to the starting means, and the upper feed momentum can be increased or decreased by operating the starting means, position detection is possible at a position facing the starting means. A device for adjusting the amount of insertion of a sewing machine, which is provided with a stopper movably supported by a different motor. 2. The sewing machine amount adjusting device according to claim 1, wherein the starting means is provided on the rear side of the table.