JPS6031518B2 - Sewing jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a jig used during sewing using a sewing machine, and particularly for sewing a curved part of a cut sewing member to a straight part of a cut sewing member. Regarding structure.

Generally, when sewing trim covers, etc. that cover the cushioning material of automobile seats, sewing parts such as the main part and side parts (hereinafter simply referred to as sewing parts) that are cut into a predetermined shape are made using a sewing machine. However, in the case of this sewing, as shown in Fig. 1, sewing member b having a curved end is often sewn to sewing member a having a straight end. .

This is because it is necessary to give a predetermined swell to the sewing part b with respect to the sewing member a after sewing is completed. By the way, in the above-mentioned sewing work, conventionally, the sewing starting ends c and d of sewing members a and b are overlapped with each other with the sewing start ends c and d held up, and the sewing parts are sandwiched between the presser foot and the feed dog of the sewing machine, and then the sewing is started. Drive the needle of the sewing machine into the starting edges c and d. Then, align the straight edge green g at the end of sewing component a with the curved edge green h at the end of sewing component b by a short sewing length, and after sewing the aligned portions, connect the straight edge g to the curved edge again. By repeating sewing a number of times while aligning the edges h with a small sewing length, the sewing members a and b are sewn to the sewing end ends e and f. For this reason, although a high degree of skill and careful attention are required, there are many variations among workers, making it impossible to perform sewing work with a good yield. In view of the above-mentioned conventional situation, an object of the present invention is to overlap a sewing member having a straight portion and a sewing member having a curved portion so that the starting ends of the sewing member are substantially aligned, and to place the sewing member between the presser foot and the feed dog of the sewing machine. By simply driving the sewing machine after pinching the sewing end of the sewing member having a curved part with a clip, the sewing member having a straight part can be moved straight in the sewing feed direction of the sewing machine, and the sewing member having a curved part can be sewn. To provide a sewing machine that allows a sewing member to be swung to copy and sew a curved part of another sewing member to a straight part of the sewing member.

Hereinafter, details of embodiments of the picking device according to the present invention will be explained with reference to FIGS. 2 to 5.

As shown in the second figure, the jig 1 of the present invention includes a guide board 2 fixed on a table i of a sewing machine. It is made up of a presser foot j and a feed dog k of the sewing machine, and is located on one side in front of the sewing machine in the sewing feed direction (same as the arrow x direction), and is detachable.

This guide board 2 is formed into a flat plate shape, and the feed dog k
A guide end surface 4 extends in a straight line in the sewing feed direction of the sewing machine in front of the sewing machine. Further, a first guide hole 5 and a second guide hole 6 are bored in the guide substrate 2, and the first guide hole 5 has an elongated shape meandering in a predetermined shape along the guide end surface 4. The second guide hole 6 is located in the middle of the first guide hole 5 and is linearly elongated in a direction substantially orthogonal to the guide end surface 4 . The first of these
The guide hole 5 and the second guide hole 6 are formed so as to be separated from each other. An actuating arm 7 is disposed on the guide board 2.
is movably placed thereon, and the actuating arm 7 is in the form of an elongated strip extending from the second guide hole 6 to the first guide hole 5. Pins 8 and 9 are installed in the portions of the actuating arm 7 that extend over the first guide hole 5 and the second guide hole 6, respectively, and these pins 8 and 9 are shown in FIGS. 3 and 4, respectively. As shown in the figure, rollers 10 and 11 are rotatably fitted. That is, as shown in FIG.
is positioned in the first guide hole 5 and protrudes from the actuating arm 7, and a roller 0 having an outer diameter slightly smaller than the hole width of the first guide hole 5 is attached to the protruding portion of the pin 8. ing. Further, as shown in FIG. 4, the pin 9 is positioned in the second guide hole 6 when the operating arm
The protruding portion of the pin 9 has a rod having an outer diameter slightly smaller than the width of the second guide hole 6.
11 is attached. As shown in the second figure, a clip 12 is integrally formed at the tip of the operating arm 7 extending from the first guide hole 5 toward the guide machine surface 4, and the clamping portion of the clip 12 is connected to the guide. It projects slightly beyond the end face 4.

This clip 12 consists of a fixed piece 13 extending integrally from the operating arm 7 and a movable piece 14 rotatably supported on this fixed piece 13, and this movable piece 14 is attached between the fixed piece 13. The movable piece 14 located at the rear of the support shaft 15 of the fixed piece 13 and the movable piece 14 is urged in the closing direction by a spring (not shown), while resisting the elastic force of the spring. By pressing the movable piece 14, the tip of the movable piece 14 is lifted, and the tip of the clip 12 is opened. Further, one end of a hanging strip 16 is fixed to the actuating arm 7 located near the pin 8, and this hanging strip 16 is extended in front of the first guide hole 5 and rotatably fixed on the table i. It is passed around the reversing roller 7. The extender of the hanging cord 16 that is passed around the roller 7 connects the through hole 18 drilled in the table i to the table i.
A weight 19 is fixed to the end of the suspension string 16 which penetrates downward. When the sewing end f of the sewing member b having a curved portion is sewn by the weight 19 in the direction of the arrow X while being held by the clip 12 as described later,
Tension is applied to the sewing member b in the direction opposite to the sewing feed direction. Further, a clamping member 20 is provided at the tip of the guide end surface 4 located on the feed dog k side, and this clamping part village 20 is located at the fifth
As shown in the figure, it is fixed to the table i with mounting screws 21,
The clamping member 20 and the guide end surface 4 are provided with sewing members a and b during sewing.
The local parts of the edges of the seam margin g and h are arranged in a state where they are moved in the direction of the arrow x. According to the embodiment configured as described above, the local portions of the greens g and h at each end of the sewing member a having a straight portion and the sewing member b having a curved portion are sandwiched between the sewing member 20.
While positioning the sewing members a and b on the guide end surface 4, the sewing start ends c and d of the sewing members a and b are placed approximately in line with each other, and the sewing machine is inserted between the presser foot j and the feed dog k, and the sewing end end of the sewing member b is placed between the presser foot j and the feed dog k. f is held between the clips 12.

At this time, the linear end green g of the sewing member is brought into contact with the guide end surface 4. By driving the sewing machine after setting the sewing sections a and b in this way, the sewing members a and b are moved in the arrow direction by the elastic pressing of the presser foot j and the feeding drive of the feed dog k. The sewing machine uses an upper thread (not shown) from a needle that is intermittently transferred and moves up and down in synchronization with the feed dog k', and a lower thread from a bobbin (not shown) attached to the bottom of the feed dog k'. sewn. By the way, when the sewing member b held by the clip 12 is sewn and fed in the direction of the arrow X, the operating arm 7 draws a regulated trajectory due to the cooperation of the first guide hole 5 and the second guide hole 6. That is,
As the clip 12 moves in the direction of the arrow X while receiving resistance from the weight 19, the pin 8 follows the first guide hole 5 and the pin 9 follows the second guide hole 6, so that the actuating arm 7 moves in the direction of the arrow Z. Composite movement in the direction of arrow W, clip 1
2 is moved in the direction of arrow X while swinging in the direction of arrow Y. Therefore, the sewing member b is sewn while being swung in the direction of the arrow Y, with the curved end green h of the end of the sewing member b substantially aligned with the straight end green g of the end of the sewing member a. As explained above, according to the present invention, the sewing start ends of the sewing members to be sewn together are sandwiched between the presser foot and the feed dog of the sewing machine, and the sewing end ends of the sewing members having curved portions are placed in the IJ clip. After clamping, just by driving the sewing machine, the curved part of another sewing part is sewn by copying the straight part of the sewing part, so uniform sewing is always ensured and reliable sewing is possible. This mechanism not only allows for efficient work, but also has a simplified structure in which the sewing member having a curved portion is swung along the curve by the combined movement of the first guide hole 5 and the second guide hole 6. There is less load on the sewing feed drive of the sewing machine, and it is possible to provide reliable rocking motion at low cost.

Furthermore, since the guide board is disposed on one side of the sewing machine in the sewing feed direction, it is possible to easily feed sewing members to the sewing machine.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a sewing member having a general straight line portion and a sewing member having a curved portion; 3 is a sectional view taken along line mm in FIG. 2, FIG. 4 is a sectional view taken along line W-N in FIG. 2, and FIG. 5 is a sectional view taken along line V-V in FIG. DESCRIPTION OF SYMBOLS 1... Picker, 2... Guide board, 4... Guide end surface, 5... First guide hole, 6... Second guide hole, 7
... Operating arm, 8, 9... Pin, 12... Clip, a
, b... Sewing member. Figure 2 Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. In a sewing jig for sewing a curved part of another sewing member onto a straight part of a sewing member using a sewing machine, a guide plate fixedly positioned at one end in front of the sewing machine in the sewing feed direction; The end face of the guide board located in front of the feed dog of the sewing machine is formed in a straight line along the sewing feed direction of the sewing machine, and the guide end face that guides the straight part of the sewing member and the guide board in a state where they intersect with each other. first and second guide holes formed therein; and an actuating arm that draws a predetermined synthetic locus of movement along the curved portion of the another sewing member while being regulated by the first and second guide holes; A sewing jig comprising a clip at the tip of an operating arm protruding from the guide end surface for removably holding the sewing end of the another sewing member.