JPS6015356B2 - Sewing machine needle hook timing change adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for changing the operating timing of a sewing machine needle and hook.

In sewing work, due to the type and thickness of the material to be sewn, as well as the resulting differences in needle and thread count, in order to obtain a good result, the meeting of the sewing machine needle and hook, that is, the timing of operation of both, is important. It is well known that there is a need to change and adjust the

However, these changes and adjustments can only be made by a skilled person who knows the configuration of the sewing machine and is skilled in the adjustment techniques and sewing-related techniques, and it takes time and requires the use of instruments. was also needed.

Moreover, it was not something that female sewing workers or housewives could easily do. The present invention provides a device that allows any person to easily change and adjust the needle hook timing of the sewing machine without requiring any skill.

For reference, we will explain the procedure for changing and adjusting the needle hook timing on a vertical hook type sewing machine for single thread stitching on the main warp.

In making the change, first, the pot, which is transmitted and driven by the geta, is made free with respect to the lower shaft.

Then, the amount of needle rise is determined using a meter or the like. Next, loosen the needle bar holding screw, move the needle bar, and determine the height and corresponding position of the needle with respect to the tip of the hook, which is rotatable with respect to the lower kettle, and then loosen the needle bar holding screw. to be tense.

After determining the gap between the needle and the tip of the hook, the hook is fixedly set on the lower rat at that position. In this way, the conventional work that requires technology, instruments, time, etc. is simplified and streamlined in the apparatus of the present invention as follows.

1 is a sewing machine head; 2 is a bed; 3 is an upper shaft to which a hand wheel 4 is fixed; a belt 5 drives a lower shaft 6 from the upper shaft 3;

A needle 8 is fixed to the lower part of a needle bar 7, and vertical movement is applied from the upper ball through a drive system winning member of the needle bar and vertical movement from the upper ball.

9 is the pot (details are omitted from illustration).

(hereinafter referred to as a hook), is driven by the geta 6, and the needle 8
In addition to cooperation with the sewing machine, sewing is performed by cloth feeding and thread tightening, but since these are well-known matters, a description of the general matters will be omitted below. ID'ma pot shaft, lower koshiki 6
The rotor 9 is supported on the bed 2 in parallel with the above, and the pot 9 is fixed to one end, and the driven gear 11 is fixed to the other end.

92, even if the boss part electric 2 Ayuko X number of Kong troops 2b are perforated even if the boss electric gear 1 engages with the turtle, the collar electric turtle fixed to the lower shaft 6 with a screw groove is attached. It is stopped in one direction (the right side as seen in the diagram) and is regulated by a ring tortoise horse for free play.

Further, in the inner bottom part 2c of the drive gear WS, there are provided a total of nine recessed parts 2c, . It will be done.

(The shapes and dimensions of these recesses are all the same, but for the sake of convenience in later explanations, they are coded into three, Denmitsu c and ~c3.) Army A, 9 Tomi Turtle A29 Den Tsuru A30... Kawashu... Ba Chi
In the large part of the color g turtle, the sea bream direction is coded 8, c
a23 Even if the through hole is drilled at the angular position shown in 83, > Qian 2 > 83, there are nine through holes in total, even if the three in the above position are considered as one unit. has been done.

Each of the through holes is provided with a threaded portion on one side, and the springs are inserted and removed from each of the poles and the screws are energized from the screw to the ball electric mouse side. The force applied to the ball is adjusted by tightening the screw.

As can be seen from Figure 1, the three ball turtles 8 in the through-holes of the tortoise fins, which are still in force, are inserted into their respective seats. In the state where the concave part c, is pressed together, the through holes Kametsuru Kame and 3 in 4a3 respectively.
Each of the balls is also deviated by the angular range indicated by 8 and 28, respectively, with respect to each catch recess c2 and c3 (as will be described later).This deviation is the amount of needle rise. In this embodiment, the rotation angle of the upper shaft corresponds to 3o and 6G).

Press the push button to engage the spring 2 in the hole 2a of the bed 2 with the drive gear flea umbrella.
It is always energized upward from the skin, and its upper position is regulated by the stop collar 2. As shown in Fig. 2, an index wing a is stamped at the appropriate place on the opposite end of the sewing machine head, and a numerical value a for the amount of feed and needle up is stamped on the handshake wheel side (see Figure 2).

Now, rotate the wheel tortoise from the illustrated state (indicator wing a and numerical value 2.Q match), and set numerical value i.Q to the index tortoise a. If you match 6, you will get ``Hari-Ha? Rutchi-Hashi 8-sama 240 mountains 1.8 = 0.4
If the lake goes down and the value of 2.4 matches, then only the 0.4 side will go up. Figures S (tortoise-2), 6 and 7 (1-2) show the height adjustment mechanism of the needle 8 provided at the part indicated by the arrow A of the t blind blade illustrated needle T. 7 is the needle set screw 22
A through hole 7b is provided above the base line 7a and the needle set screw 2, and a pin 23 with a face is loosely held in the through hole 7b to stop the movement in the mar direction. It is regulated by the mother. On the surface of the head of the face pin 23, the symbol 1 and the melon steel are marked on the counterfeit three equal parts.
In the center of the pin with the face corresponding to the crab, there is ~Matsuri (
As shown by reference numerals 8 and d8 in the figure, cutting flat portions 23a and 230 having different depths are provided.

Therefore, as you can see from now on, change the symbol 1 (shown in Figure 5-1) of the faceted pin dew weight that matches the base line 7a of the needle bar to symbol D or symbol Mochi and operate the needle clamp screw 2. Moreover, the fixed height of the needle thread fixed to the needle thread 7 can be changed.

The device of the present invention is constructed as described above, and its functions and effects will be described below.

In general, materials to be sewn in sewing can be roughly divided into thin materials and medium materials.
Depending on the thickness of the material, adjusting the operation timing of the needle and hook on the sewing machine is also possible.If these three types can be adjusted, a satisfactory sewing result can be obtained in most cases. The symbol 1 and the ratio m are also thin, respectively.
It is designed to accommodate medium and thick materials. Therefore, the operation timing of the needle hook is as shown in Fig. 2 and Fig. 2. In the latter case, the base line Ta
This section explains the case of changing from a state in which the set is compatible with sewing medium-sized items (where the and symbol B match) to sewing light-weight items.

First, the bush button 19 on the bed 2 is pressed down to engage and maintain its tip with the hole size 2b of the drive gear 12.

(By operating the handwheel 4, you can easily find the engagement position for both.) Next, turn the handwheel to match the indicator turtle a with the symbol 1 (number = 1.6) that corresponds to the sewing of thin materials, and the upper shaft 3,
The collar blade 4 fixed to the lower ball 6 of the belt 5 through the lower shaft 6 rotates (approximately 3 degrees), but the driving gear 12 does not rotate because the push button 19 is kept depressed.

Therefore, the hook is also immovable in both the rotational and axial directions. Since only the collar 14 extends over the stationary drive gear 12, the through holes 14a. , 14, and 14a3 (nine balls in total) are supported by the pressure of the spring 17 and rotate integrally. As can be seen in FIG. 2, before the change, that is, when setting the filling stitch, this ball 16 had only three through holes 14a in the collar 14.
The recesses 12c of the drive gear 12 are aligned with the recesses 12c of the drive gear 12, respectively. Then, connect the other through holes 14 to each 3 in 14a3.
The position of each ball is indicated by the symbol 3? for each concave turtle 2c2 and 12c3 of the turmoil gear where each ball is to be seated.
It was deviated by an angle indicated by 28. From this state, each ball 16 in the three through-holes 1-a2 corresponding to the thin fabric sewing set position is fixed in the recess 12c2 of the drive gear to be seated, respectively, by turning the collar mother turtle (approximately 30 times). This increases the mutual rotational resistance between the collar 14 and the drive gear 12 in the set.

As a result, each of the three balls corresponding to the medium and thick sets is placed at an angular position that is offset by 3o from the seating recesses 12c and 12c3, respectively.

After doing this, the push button 19 can be released from being held down since the appropriate correlation between the hook point and the needle lift amount for sewing thin materials is established.

Next, change the symbol of the headed pin 23 provided on the needle bar 7 to the fifth
-2 As shown in Figure 5-1, the base line 7a is converted from B to 1 and matched. By this, headed pin 2
The central shaft of No. 3 has a cross-sectional arrangement as shown in FIGS. 7-12 to 7-1, and the needle is placed upwards only at the base indicated by d, and the relationship between the tip of the hook and the thread hole of the needle ( thread scoop)
etc. are set at preset timing positions suitable for sewing thin materials. The above explanation has been about changing from medium to thin, but changing from thin, medium, or thick can be done using the same operating procedure as described above.

In addition, in this embodiment, ball seating recesses were provided at equally divided locations on the drive gear, and through holes were provided at unequal locations in the collar, but this arrangement may also be reversed. Needless to say. As described above, in the device of the present invention, changes and adjustments to the needle hook operation timing of a sewing machine, which conventionally required technology, measurement, adjustment effort, etc., can be made by operating a push button to change each change provided on the hand wheel and needle twill. The adjustment means makes it possible to perform the adjustment reliably and easily, and the effect is remarkable.

A simple outline of the drawings: FIG. 1 is a center sectional zero view of a sewing machine equipped with the device of the present invention;
Fig. 2 is an explanatory diagram of the hazumi part of the sewing machine shown in Fig. 1, Fig. 3 is a sectional view of the driving part between the bottom and hook of the sewing machine shown in Fig. 1, and Fig. 4 is a right side view of Fig. 3; 5(1-2) is an enlarged side view of the needle height adjusting mechanism in the direction of disappearance of FIG. 1A, FIG. 6 is a central vertical sectional view of FIGS. Each figure is an explanatory sectional view of a headed pin.

1...Sewing machine head, 2...Bed, 3...
・・Upper ball, 4・・・Hazumi wheel, 6・・・Lower shaft,
7...Needle, 8...Needle, 9...Kettle, 10.
...Kettle axis, 11...Junior 0 sardine gya, 12...
Riot Gya, 14...Color, 16...Ball, 19...
...Push button, 22... Needle fixing screw, 23
・・・・・・Pin with head.

Figure 2 Figure 5-1 Figure 5-2 Figure 1 Figure 3 Figure 4 Figure 6 Figure 7-1 Figure 7-2

Claims (1)

[Claims] 1. A hand wheel, needle bar, and lower shaft that interlock with the upper shaft of the sewing machine;
a collar fixed on the lower shaft; a driving gear for the shaft disposed on the collar and having a clutch mechanism therebetween; and the collar and the driving gear are capable of mutual rotation and axial movement. This can be prevented by keeping the relationship between the lower shaft and the hook shaft unchanged by operating change adjustment displays and means provided on the sewing machine head handwheel and the appropriate positions below the needle bar, respectively.
A needle hook timing change adjustment device for a sewing machine, which adjusts the needle lift amount and needle height by changing the relationship between the hook shaft and the upper shaft.