JPS6324986A - Yarn passing method and device in needle hole of sewing machine - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in a threading method and device for threading thread through the needle hole of a sewing machine needle.

[Prior Art and its Problems] Recently, the present inventor has developed a method in which the push plate 5 and the piece 7 are connected to each other by an arm 8 within the instrument body 1, as shown in FIG. We have developed a threading device that moves the thread pushing core 6 forward and backward through the pushing plate 5.

However, when using this threading device, the thread pushing core 6
After the tip of the thread presser core 6 entered the needle hole 25 of the sewing machine, the tip of the thread pusher core 6 did not come out of the needle hole 25 unless the pusher plate returned to its old position.

For this purpose, the state in which the push plate 5 is kept pressed, that is,
There is a tendency to lower the threading device and pull out the thread while it is inserted into the tip of the thread presser core 6 or the needle hole 25, and as a result, the tip of the thread presser core or the wall of the needle hole 25 tends to be pulled out. The threading device was damaged by colliding with the threader, and the threading device stopped functioning.

[Object of the Invention] The present invention has been made in order to solve the problems of the prior art as described above, and the thread pushing core can be automatically returned to the old position without returning the pushing plate. To achieve this purpose, a new system that is easy to use and smooth can be restored.
In the threading method in the sewing machine needle hole of the present invention, the tip of the thread presser core is inserted and advanced into the sewing machine needle hole to push out the sewing thread, and only the extruded sewing thread is left there. A thread threading method in a sewing machine needle hole is characterized in that the pusher core is automatically retracted by an arbitrary resistance sensor, and in the thread threading device in a sewing machine needle hole according to the present invention, the thread pusher core is The base end is fixed on both sides of the end of the device main body from which the thread presser core advances, and is equipped with a push plate that moves the thread presser core forward and backward and moves the thread presser core forward and backward. A pair of thread pinching plates extending in the advancing direction are provided with their hands joined together so that the leading end side pinches the advancing thread pushing core. A needle guide passage into which a sewing machine needle is inserted is formed in a direction substantially perpendicular to the advancing direction, and a thread guide groove facing the advance/retreat passage of the thread pusher core is provided in a portion in front of the needle guide passage. In a threading device, a thread pushing core pushed out by a pushing plate receives a load from a resistor at a certain advanced position, is released from its engagement with the pushing plate, and automatically returns to its original position. It is characterized by being configured as follows.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to one drawing. Note that the same reference numerals are used for components common to the conventional one.

FIG. 1 shows a perspective view of a threading device A according to the present invention. In FIG. 1, the threading device A is composed of an operating portion a and a sewing machine needle engaging portion.

The operation part a consists of an instrument body 1, a push plate 5, etc.
As shown in FIGS. 2 and 3, in the lower storage chamber 10 in the device main body l, the thread presser core 6 has a return spring 6b and a piece 7.
is held so that it can move back and forth freely through the
One end of the push plate 5 is pivotally supported by a pivot 13, and the other end is incorporated in a storage chamber 11 that opens upwardly, and is biased in a direction to protrude upwardly and externally via a return spring 9. ,
The base end of the arm 8 is rotatably supported by a pivot 16, and the distal end 81 of the arm 8 is inserted into the storage chamber 15 which opens downward in the push plate 5, and the rear upper edge of the piece 7 and the upper rear edge of the piece 7 via a spring 8a. A stopper 14 that abuts against the front end 71 of the piece 7 is provided in the lower housing chamber 10 at the location where the front end 71 of the piece 7 is located when the thread presser core 6 is advanced to a predetermined position. .

The sewing machine needle engaging portion is connected to the thread clamping plate 4 and the thread stabilizing plate 1.
9. It consists of a ruler plate 20 and the like.

As shown in FIG.
, 4b, each base end 41a, 41b is fixed to each side of the left and right end portions of the instrument main body l from which the thread presser core 6 advances, and each tip end side holds the yarn presser core 6 from which it advances. The shape of the palms together extends in the direction of its advance. And these thread pinching plates 4a.

Those thread pinching plates 42a at the part where the palms join together in 4b
, 42b, a needle guide passage 2 in which the sewing needle 21 (see FIG. 1) is inserted in a direction substantially perpendicular to the advancing direction of the thread pusher core 6 is formed, and the thread nipping plate A thread guide 11t3 facing the forward and backward movement path of the thread pusher core 6 is provided at a portion in front of the needle guide path 2 in 4a and 4b.

This thread guide groove 3 is provided with a thread stabilizing plate 19 or a thread guide 1+W 3 on both sides of the thread so as to close the thread guide groove 3 and press the threaded thread 22 against both sides of the thread nipping plate 4, as shown in FIG. It will be installed. Reference numeral 23 is a mounting portion of the thread stabilizing plate 19, which is fixed to one of the thread pinching plates 4a.

This thread nipping plate 4a is made of a thicker member than the other thread nipping plates 4b, and has more rigidity than springiness.

A portion of this thread pinching plate 4a that fixes the thread stabilizing plate 19 extends vertically upward and forms a ruler fixing portion 20a,
A ruler movable part 2 extends upward from the ruler fixed part 20a, contacts the lower end of the needle attachment part 24, and pinches the upper end of the needle 21.
0b is fitted into the vertically movable portion, and the ruler plate 20
4! I will make it.

20c is a vertical movement guide piece, 20d is a guide slot, 26
27 is a fixing screw, 28 is a screw hole, and 29 is an adjustment scale. The positioning is thus adjusted depending on the type of sewing machine needle. Said other thread pinching plate 4
b (see Fig. 3) has more springiness than rigidity, and when its proximal end 41b is fixed to the instrument main body l, its distal end side is biased to join the distal end side of the mating thread pinching plate 4a. A thread hook 30 is formed above the tip of the hook 30, which extends above the tip of the mating thread nipping plate 4b.

[Operation of unreleased IJI] Next, the operation of the threading base AA configured as described above will be explained.

First, the height of the ruler plate 20 of the two-threader AA is adjusted according to the type of sewing machine needle 21 to be used, and the passage through which the thread pusher core 6 advances is made as shown in FIG. Align it with the needle hole 25 of the sewing machine needle 21.

Next, as shown in FIG.
9, pull down the sewing thread 22 until it catches the bottom of the thread guide groove 3 and insert it (see Figure 2).

Next, ′! on the ruler plate 20 of this threader AA! ! Fit the J-clamping part 26 onto the sewing machine needle 21, and
The distal end of the needle is positioned above the needle guide passage 2, and the abutting and holding portion 26 is raised as shown in FIG.

Then, as shown in FIG.
When the arm 8 is pressed in the direction of arrow A, that is, downward, against the bias of the return spring 8a, the tip 81 of the arm 8 folds downward against the bias of the return spring 8a. 7a, the piece 7 is slid forward against the bias of the return spring 6 until its front end 71 abuts against the stopper 14. At the same time, thread pressing core 6; yo arrow (b)
Move forward in the direction of and reach its tip! The thread 22 is hooked onto the thread 116a, passes through the sewing machine needle hole 25, and is further inserted into the palm joining part 4.
It advances forward against the bias of 3a and 43b and protrudes to the outside.

When the front end 71 of the piece 7 collides with the stopper 14, the arm 8 further overcomes the bias of the return spring 8a due to the load received at that time, and is folded in the folding direction [arrow (d)].
The tip 81 can be removed from the groove/step portion 7a.

The moment this tip 81 disengages from the groove-like stepped portion 7a,
The thread presser core 6 and the piece 7 are returned to their original positions in the open position by the bias of the return spring 6b. In other words, the thread presser core 6 is connected to the stopper 14. It automatically retreats to its original position by sensing the resistance caused by the palm-jointing parts 43a, 43b, etc.

Next, when the pressure on the push plate 5 is released, the push plate return spring 9
The push plate 5 rotates in the direction of the arrow (c) and returns to its original position due to the bias of the arm return spring 8a. is set to engage.

FIG. 4 shows a second embodiment of the threading device of the present invention, in which the needle guide X2 and the thread guide 11133 are provided on the device main body 1 side, and the thread guide plate 19 is provided in the thread guide groove 3. Is the needle hole facing the needle, and is the needle hole positioned comfortably by the needle tip abutting plate 21a?

The structure and operation of the threading operation section a are the same as in the embodiment described above.

In addition, in the two embodiments described above, the push plate 5 of the operation part a is designed to operate in the vertical direction, or as shown in FIGS. Other designs may be used to carry out the present invention, such as locating the actuator in any direction to operate in the left-right direction or in the front-rear direction. In FIG. 5, 101 is an engagement spring between the push plate 5 and the piece 7;
02 is a resistor that folds the engagement spring 101;
3 is a return spring for the push plate 5; in FIG. 6, 104 is an engagement portion between the push plate 5 and the piece 7; 104a is an engagement protrusion on the push plate S side; It is a synapse.

[Effects of the Invention] As described above, according to the method of the present invention, the thread can be smoothly threaded into the sewing machine needle hole with a single touch, and the thread presser core automatically retracts while being caught between the pieces. Then, by threading the thread,
The thread pressing core will not be damaged.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a threading device according to a first embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional side view of the same upper threading device, Fig. 3 is an exploded perspective view of the same upper threading device, and Fig. 4 5 is a vertical cross-sectional side view of a threading device according to a second embodiment of the present invention, FIG. 5 is a vertical cross-sectional plan view of a threading device according to a third embodiment of the present invention, and FIG. FIG. 7 is a vertical side view of a conventional threading base. A-... Threading device, 1... Device body, 2...
Needle guide groove, 3... Thread guide groove, 4... Thread pinching plate, 5... Push plate. 6... Thread press core metal, 6b... Thread press core return spring 7...-piece, 7a... Groove step, 71...
...Front end of piece, 8...Arm. 81...Arm tip, 8a...Arm return spring, 9
... Push plate return spring, 14... Stopper, 19.
...Thread guide plate, 21...Sewing machine needle. 22... Thread, 25... Needle eye. Figure 5

Claims (2)

[Claims] (1) By inserting and advancing the tip of the thread presser core into the sewing machine needle hole, the sewing thread is pushed out, leaving only the extruded sewing thread there, and the thread presser core is automatically moved using an arbitrary resistance sensor. A method for threading a thread through a needle hole of a sewing machine, characterized in that the threading method is configured to move the thread backward. (2) An end portion of the device main body from which the thread presser core advances to the device body, which holds the thread presser core so that it can move forward and backward, and is equipped with a push plate that moves the thread presser core forward and backward. A pair of thread pinching plates are provided on both sides with the proximal ends fixed and the distal ends extending in the advancing direction in a state of folding their palms together so as to sandwich the advancing thread presser core, and the above-mentioned thread pinching plates are placed in front of the part of the thread pinching plates where the palms join together. A thread guide groove that forms a needle guide passage into which a sewing machine tension is inserted in a direction substantially perpendicular to the advancement direction of the thread pusher core, and faces the advancing and retracting passage of the thread pusher core at a portion in front of the needle guide passage. In a threading device configured with a threading device, the thread pushing core pushed out by the push plate receives the load of the resistor at a certain advanced position, and is disengaged from the push plate and automatically returns to the original position. A threading device for a sewing machine needle hole, characterized in that it is configured to return to its original position.