JPH06362U - Thread take-up spring device - Google Patents

Abstract

(57) [Abstract] [Purpose] A support provided rotatably on the machine frame between the balance of the sewing machine and the thread supply source and having a circular arc-shaped penetrating portion on the side surface, and a thread hook at the tip. And is stored in the support so as to project the thread hooking portion from the through portion of the support,
A thread take-up device including a thread take-up spring having an upward biasing force, and a thread guide provided on a sewing machine frame between a support and a balance of a sewing machine to hook a sewing thread at high speed operation of the sewing machine. Stabilize the sewing thread without slacking and obtain proper seams. [Structure] Between the support 5 and the thread guiding tool 7, a sewing thread between the thread guiding tool 7 and the thread take-up spring B lowered when the thread 2 draws the sewing thread 1 is formed in a straight line in the sewing machine frame. In the sewing thread path, the thread path stabilizer A that locks the thread take-up spring B is installed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thread take-up spring device, and more particularly to a thread take-up spring device that stabilizes a sewing thread path even when a sewing machine is operated at a high speed and forms an appropriate stitch.

[0002]

[Prior art]

 FIG. 3 is a view showing a sewing machine, and N is a sewing needle which moves up and down and supplies the sewing thread 1 (upper thread) to the cloth. And, 2 is a balance which moves up and down after the seam is formed so as to pull up the sewing thread 1 and properly tighten the seam. By the way, when the sewing thread 1 between the balance 2 which moves the sewing thread 1 up and down and the sewing thread supply source 1a (thread piece) is released, the movement of the balance 2 causes the sewing thread 1 to oscillate unnecessarily. As a result, proper seam formation cannot be formed.

Therefore, between the balance 2 and the suture thread supply source 1a, a thread tension device 3 for applying a predetermined tension to the suture thread 1 and a thread take-up spring device 4 for hanging the suture thread 1 so that the suture thread 1 is not loosened are installed. Has been done.

FIG. 4 is an external perspective view showing the thread tension device 3 and the thread take-up spring device 4. The thread tension device 3 and the thread take-up spring device 4 are integrally formed. The thread tension adjuster 3 stores two thread receiving trays 3b that sandwich the sewing thread 1 and a spring body (not shown) that applies a biasing force to the thread receiving trays 3b. The biasing force of the spring body can be adjusted by rotating the dial 3a.

On the other hand, the thread take-up spring device 4 is rotatably supported by the machine frame M of the sewing machine, has a support 5 having an arcuate penetrating portion 6 on its side surface, and has a thread hooking portion Ba at its tip. A spring body B that is stored in the support body 5 so as to project Ba from the penetrating portion 6 and has an upward biasing force, and a thread guide tool 7 provided in the sewing machine frame M between the support body 5 and the balance 2. And, and are configured.

The thread take-up spring device 4 configured as described above operates as shown in FIG. 5 during sewing. In FIG. 5, the balance 2 is shown as a solid line when it descends and as a dotted line when it rises. Then, the thread take-up spring B pulls up the sewing thread 1 when the balance 2 is descending (solid line position), and is in the descending state (dotted line position) when the balance 2 is ascending, and follows the balance 2 so as not to form slack in the sewing thread 1. Then exercise.

Further, the thread take-up spring B needs to adjust the movement amount by changing the thickness of the cloth to be sewn or the stitch pitch. To adjust the movement amount of the thread take-up spring B, the support 5 is rotated. This is done by adjusting the positions of the thread guide 7 and the upper end 6a of the penetrating portion 6. That is, in order to reduce the driving amount of the thread take-up spring B, the support body 5 is rotated counterclockwise in the figure, and to increase the movement amount, the maintenance body 5 is rotated clockwise in the figure. This is done by limiting the upward movement angle of.

[0008]

[Problems to be solved by the device]

 However, the conventional thread take-up spring device has the following problems. When the sewing machine is operated at a high speed, that is, when the balance is moved up and down at a high speed, the thread take-up spring B of the thread take-up spring device 4 is at a position where the sewing thread 1 becomes linear and stops (shown by a dotted line). ), The speed of movement is so high that it will drop more than necessary.

When such an inconvenience occurs, when the balance starts to descend and loosens the sewing thread 1, a movement time is required until the thread take-up spring B hooks the separated sewing thread 1 and loosens the sewing thread 1. This cannot be solved, and an inconvenience that proper stitches cannot be formed occurs.

[0010]

[Means for Solving the Problems]

 The thread take-up spring device according to the present invention has been made in order to solve the above-mentioned problems, and when the sewing machine draws the sewing thread into the machine frame between the support and the thread guide, An object of the present invention is to provide a thread path stabilizer for locking the thread take-up spring in the sewing thread path in which the sewing thread between the lowered thread take-up spring and the thread guide is linear, to solve the above conventional problems. .

[0011]

[Action]

 In the thread take-up spring device according to the present invention, when the sewing machine operates at high speed, the thread take-up spring, which tends to descend more than necessary, is locked by the thread path stabilizer, and the sewing thread is made linear, thereby eliminating looseness of the sewing thread. Enables proper seam formation.

[0012]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. The same parts as those in the conventional example are designated by the same reference numerals, and duplicate description will be omitted. 1 and 2 are views showing an embodiment of the yarn take-up panel device according to the present invention.

In FIG. 1, A is a yarn path stabilizer, and the yarn path stabilizer A includes a mounting base A1 and an abutment portion A2 provided above the mounting base 1 and made of an elastic material such as a rubber material. It consists of

The contact portion A2 of the thread path stabilizer A is provided when the sewing machine draws the sewing thread 1 into the sewing machine frame M between the support 5 and the thread guide 7 by the mounting base A1. The sewing thread 1 between the lowered thread take-up spring B and the thread guide 7 is fixed to the linear sewing thread path.

As shown in FIG. 2, the thread take-up spring device configured as described above locks the thread take-up spring B and the sewing thread 1 when the sewing machine is driven, so that the thread take-up spring B can be operated even when the sewing machine is operated at a high speed. It prevents excessive movement, keeps the thread take-up spring B in contact with the suture thread 1, and eliminates the looseness of the suture thread 1 when the balance is lowered, thereby enabling proper formation of the stitch.

When changing the moving amount of the thread take-up spring B, the support 5 is rotated to change the distance between the upper end 6 a of the penetrating portion 6 and the thread guide tool 7 as in the conventional case. You can adjust the angle of upward movement.

[0017]

[Effect of device]

 As described above, the thread take-up spring device according to the present invention includes the thread take-up spring that is lowered when the sewing machine draws the sewing thread and the thread guide tool in the machine frame between the support and the thread guide tool. Since the sewing thread path between which the sewing thread is linear is provided with a thread path stabilizer that locks the thread take-up spring, this thread path stabilizer prevents the thread take-up spring from moving more than necessary, and The straightness eliminates the looseness of the sewing thread and enables the formation of proper seams.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a thread take-up spring device according to the present invention.

FIG. 2 is an explanatory diagram showing a state in which the thread take-up spring and the sewing thread are locked by the thread path stabilizer when the thread take-up spring device shown in FIG. 1 is driven.

FIG. 3 is a side view showing the sewing machine.

FIG. 4 is an external perspective view showing a configuration state of a conventional thread take-up spring device.

5 is an explanatory view showing the operation of the thread take-up spring device shown in FIG. 4 during sewing.

6 is an explanatory diagram showing a state in which the thread take-up spring is lowered more than necessary when the sewing machine is driven at high speed in the thread take-up spring device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewing thread 2 Balance 5 Support 6 Penetration part 7 Thread guide tool A Thread path stabilizer B Thread take-up spring M Sewing machine frame

Claims (1)

[Scope of utility model registration request] 1. A support body rotatably provided on a sewing machine frame between a balance of a sewing machine and a sewing thread supply source, and a support body having an arcuate penetrating portion on a side surface, and a thread hooking portion at a tip portion, The thread take-up spring, which is stored in the support body so as to project the tip from the penetrating portion of the support body and has an upward urging force, and the sewing thread provided on the machine frame between the support body and the balance of the sewing machine. In a thread take-up device including a thread guide tool to be hooked, a thread take-up spring lowered when a sewing machine draws a sewing thread into a machine frame between a support and the thread guide tool, and a thread guide tool. A thread take-up spring device, characterized in that a thread path stabilizer for locking the thread take-up spring is provided in the sewing thread path in which the sewing thread between them is linear.