JPS646783Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a thread guide device for a sewing machine.

The needle thread of a sewing machine is pulled out from the spool, and then threaded through the thread guide, thread tensioner, thread take-up spring, and a thread hole at the tip of the top pin before being threaded into the needle. Recently, however, in order to simplify the appearance, the thread tensioner and top pin have been built into the arm, making thread distribution a tedious task. For this reason, some beginners do not know how to thread the needle or make mistakes when threading the needle.

The present invention has been made in view of the above circumstances, and includes a first guide member attached to a boss portion protruding from the end surface of the arm so as to define a clearance between the boss portion and the end surface of the arm; The arm 11
a second guide member attached to define a clearance between a downward protrusion formed on an end face of the arm and an end face of the first guide member and a lower surface of the first guide member, respectively; a face plate attached to the rear of the end face of the arm so as to define a clearance between the end face of the second guide member, and the end face of the arm and the rear face of the second member, and the end face of the second member. When viewed from the front of the arm and from above the arm, the third guide member is attached to define a clearance between the arms, and the clearances are sequentially connected to each other.
a plurality of fins formed on the rear surface of the second member at predetermined intervals and extending vertically and rearward; and a plurality of fins formed on the third guide member and facing each other between the fins. and a plurality of slits, the number of which is one less than the number of fins, extending in the vertical direction;
a take-up bin having a plurality of thread hooking portions, one less than the number of fins, each passing through the slit and extending between the fins, and scooping up the yarn guided into the groove by the thread hooking portions. It is something.

As a result, according to the present invention, thread distribution can be completed simply by guiding the upper thread along the groove, and the above-mentioned problems can be solved. Furthermore, since the thread can be picked up by the thread hook part of the thread take-up during thread distribution, it is no longer necessary to pull the thread take-up up to near the top dead center when distributing the thread, which has a great practical effect. Further, the plurality of fins other than those at both ends can prevent the thread from becoming slack and entering between the fins, thereby preventing the thread from coming off the thread take-up.

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

1 to 6, a first guide member 14 is attached to the end 12 of the arm 11 of the sewing machine 10 by screws 13, 13', and the end surface 12 of the arm 11 and the first guide member 14 are attached to the end 12 of the arm 11 of the sewing machine 10. Right end surface 14
A clearance 15 is formed between f. That is, two protruding boss portions (not shown) are formed on the end surface 12 of the arm 11, and the upper left portion 14 of the first guide member 14 is formed on the boss portion.
a and the inner part 14c of the lower forked part 14b are brought into contact, and then the first guide member 14 is inserted between the right end surface 14f of the first guide member 14 and the end surface 12 of the arm 11 by screws 13 and 13'. It is attached to the end face 12 so that a predetermined clearance 15 is formed. Thus, the first guide member 14 has a generally square shape, and has a thread guide 16 formed in the upper left portion 14a and a guide surface 17 formed in the outer portion 14d of the lower forked portion 14b. A thread tension plate 18 is attached to the upper right portion 14e of the first guide member 14, and the spool 1 rotatably mounted on the arm 11 is attached to the upper right portion 14e of the first guide member 14.
The needle thread 20 wound around the needle thread 9 is guided through a thread guide 16, a thread tension disc 18, and a guide surface 17, and is passed through a thread take-up spring 27 fixed to a screw 13'.

The thread tension disc 18 is located at the upper right corner 1 of the first guide member 14.
By rotating a pair of opposing plates 22, 22' mounted on a shaft 21 fixed to the shaft 4e and a dial 50 mounted on the shaft 21, the spring 2
The clamping force of the upper thread 20 is adjusted by changing the biasing force applied to the plates 22, 22' of No. 3.

24 is a second guide member fixed to the downward protrusion 12a of the end surface 12 of the arm 11 with a screw 25;
b is hollowed out and is lower than the left upper part 24g, and when the second guide member 24 is attached to the end face 12 of the arm 11, the right end face 24d of the second guide member 24
and the right lower part c have a clearance 25 between them and the left end surface 14g and the lower surface 14h of the first guide member 14, respectively.
and a clearance 26.

A face plate 28 is attached to the rear part 12b of the end face 12 of the arm 11 by a hinge means (not shown), and forms a clearance 30 between the end face 28a of the face plate 28 and the left end face 24e of the second guide member 24.

A third guide member 31 is disposed behind the second guide member 24, and its upper part 31a is bent and fixed to a boss portion 32 of the arm 11 parallel to the bed (not shown) with a screw 33. There is. The intermediate portion 31b of the third guide member 31 has a first portion 31c facing the three fins 24a of the second guide member 24,
The first guide member 14 is substantially perpendicular to the first portion 31c.
The second part 31 parallel to the fin 24a farthest from
It consists of d. Therefore, a pair of vertical grooves 31e, 31e are carved in the first part 31c,
Further, the lower part 31f of the third guide member 31 is fixed to the lower part of the second guide member 24 with a screw 34. A clearance 35 is formed between the first portion 31c of the intermediate portion 31b of the third guide member 31 and the fin 24a. Second part 3 of intermediate part 31b of third guide member 31
1d and the end surface 28a of the face plate 28 form a clearance 38 between the fin 24a that is farthest from the first guide member 14.

Clearance 15, 25, 26, 30, 35,
38 forms a groove 39 through which the needle thread is passed;
When viewed from the front of the arm 11, it has a 〓 shape, and when viewed from above, it also has a 〓 shape.

The take-up pin 40 is configured to reciprocate in the vertical direction between the top dead center and the bottom dead center, which are shown by solid lines and imaginary lines in FIG. 3, by a link mechanism 42 that interlocks with the upper shaft 41. . Thus, the tip of the thread take-up 40 is bifurcated (threading part) 40a, 40a, and the bifurcated slits 31e, 40a are slits 31e, 40a.
31e and is located between the fins 24a of the third guide member 31 and the second guide member 24, and the upper thread 2
0 is inserted into the clearance 35 from above, the upper thread 20 is inserted into the two prongs 40a, 40a of the thread take-up 40.
It is designed to be placed on top. Further, the link mechanism 42 moves the needle bar 44 on which the needle 48 is mounted to the take-up pin 4.
It is designed to be driven in synchronization with 0. 45
is the presser bar.

In order to pass the needle thread 20 through the thread 43a of the needle 43, the needle thread 20 may be pulled out from the spool 19, passed through the thread hook 24c, and then passed along the cross-shaped groove 39. In the process, the upper thread 20 is
8. Thread take-up spring 27 is passed through, and thread take-up 4
It will be in a state where it can be scooped up by the two prongs 40a and 40a of 0. After exiting the groove 39, the upper thread 20 can be easily passed through the needle 43a of the needle 43 via the hook 46.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an arm of a sewing machine to which a thread guide device according to the present invention is applied, FIG. 2 is a view in the direction of arrow A in FIG.
FIG. 4 is a cross-sectional view taken along the line in FIG. 2, FIG. 5 is a cross-sectional view taken along the line in FIG. 3, and FIG. 6 is a cross-sectional view taken along the line in FIG. 4. 11... Arm, 14... First guide member, 24
... second guide member, 28 ... face plate, 31 ... third
Guide member, 31e...Slit, 39...Groove, 4
0...Tenbin, 40a...2 prongs.

Claims (1)

[Claims for Utility Model Registration] (a) The first guide member 14 is attached to a boss portion protruding from the end surface 12 of the arm 11 so as to define a clearance 15 between the boss portion and the end surface 12 of the arm 11: (b) Clearances 25 and 26 are defined between the downward protrusion 12a formed on the end surface 12 of the arm 11 and the end surface of the first guide member 14, and between the lower surface of the first guide member 14, respectively. (c) A face plate 28 is installed to define a clearance 30 between the rear part 12b of the end surface 12 of the arm 11 and the end surface of the second guide member 24: (c) d) The second member 2 is attached to the end surface 12 of the arm 11.
4 and the end surface of the second member 24, respectively: (e) the clearances 15, 25, 26, 35,
The arm 1 is formed by sequentially connecting 38 to each other.
(f) A groove 39 is formed in the rear surface of the second member 24 at a predetermined interval and extends vertically and rearward. (g) A plurality of fins 24a formed on the third guide member;
a plurality of slits 31e that are one less than the number of fins 24a that are opposed to each other between the slits 31a and extend in the vertical direction; A thread guide device for a sewing machine, comprising: (i) a take-up bin 30 having a plurality of thread threading portions 40a and scooping up the thread guided into the groove 39 by the thread threading portions 40a;