JPH0779887B2 - Folding device for cloth to be sewn in a sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is suitable for forming two folds or three folds on the upper end of the curtain by sewing with a sewing machine when sewing the curtain. The present invention relates to a foldable device for a cloth to be sewn in a sewing machine.

(Prior Art) When sewing a curtain, a fold is formed along the upper edge of the curtain. FIG. 8 is an example of the folds described above, in which the upper edge of the curtain A is folded in two and the lower part of the fold line is sewn along the first seam line Ba in the lateral direction to fix the fold line, and then the curtain A Make a vertical fold C by pinching the upper part of your finger with your finger, press this fold C with your finger and insert it between the cloth support plate and the cloth retainer of the sewing machine, lower the cloth retainer and press the fold C by the urging force. After that, the sewing machine was driven and the folds C were sewn along the second suture line Bb and the third suture line Bc to fix the folds C. Note that the number of fold mountain Ca and fold valley Cb is arbitrary, but in general, fold mountain Ca is 2
~ 3 pieces are formed, and the number of fold valleys Cb is one less than that of fold mountains Ca. Although the third suture line Bc is shown in FIG. 8 in the vertical direction, it may be formed in the lateral direction.

(Problems to be solved by the invention) Conventionally, since the folds are formed by manually pinching the curtain, the folding position varies depending on the worker, and the position of the folds when the folds of the curtain are taken and conveyed to the sewing machine. Misalignment,
Therefore, there is a problem that the height H of the fold mountain Ca and the depth D of the fold valley Cb vary greatly, resulting in poor appearance and low productivity.

The present invention provides a pleating device in which the height H of the folds Ca and the depth D of the folds Cb are automatically set, and two folds or three folds can be selected and formed. It is provided.

(Means for Solving the Problems) The puckering device for the cloth to be sewn in the sewing machine of the present invention is
In a sewing machine including a cloth support plate 2 and a cloth retainer 6 that sandwich a cloth to be sewn A and move back and forth and left and right along the upper surface of the table 1 of the sewing machine, the table 1 formed on the front side of the table 1 is a flat plate. The three folds forming spatula 11 having the edge 11a facing the side in the width direction of the sewing machine and the needle grooves 11b in the front-rear direction opening at a plurality of positions of the edge 11a are arranged in parallel in the vertical direction and the folds in the upper stage. The forming spatula 11 can be lowered so that the forming spatula 11 can be stacked on the middle fold forming spatula 11, and between the space between the cloth support plate 2 and the cloth presser 6 and the standby position in front of the table 1. The fold forming spatula 11 and the table 1 are provided at the standby position so that they can move forward and backward.
And the two fold forming spatula 21 which are formed of a flat plate and have an edge 21a in the width direction of the sewing machine facing the fold forming spatula 11 side and the standby positions on the front and side of the table 1. Is provided so that it can be moved back and forth in the width direction of the sewing machine.
Also, the fixing needle 9 of the fabric A to be sewn is provided above and above the plurality of needle grooves 11b of the fold forming spatula 11 which has entered between the cloth pressers 6 so as to be able to move up and down.

(Operation) When the fold forming spatula 11 and the fold forming spatula 21 are respectively in the standby position and the three fold forming spatula 11 are separated into the upper, middle and lower three stages, these three pieces are provided. Spatula for fold formation of 11
Hang the cloth A to be sewn so as to cover the edge 11a,
Thereafter, the spatula forming spatula 21 is moved from its standby position to the front of the table 1, that is, between the table 1 and the spatula forming spatula 11 at the standby position. Then, a spatula for forming Fukuyama
11 is advanced to the position of the fold forming spatula 21 and one fold forming spatula 11 and one fold forming spatula 21 are alternately engaged with each other, whereby the above-mentioned sewn fabric A is bent in a zigzag shape. Subsequently, the spatula forming spatula 21 is retracted to the initial standby position, whereby the spatula forming spatula 21 is pulled out from the sewn fabric A in the bent state, and then the spatula forming spatula 11 is further removed. The cloth A to be sewn in the bent state by moving it forward
Is inserted between the cloth support plate 2 and the cloth retainer 6 on the table 1. Then, the cloth presser 6 is biased downward to sandwich the cloth A to be sewn between the cloth support plate 2 and the cloth presser 6, and then the fixing needle 9 at the upper standby position is lowered to sew the cloth. The cloth A to be sewn is fixed by piercing the cloth A, then the fold forming spatula 11 is retracted to the original standby position, and the fixing needle 9 is further raised to the standby position, and then the sewing machine is driven. The sewing machine needle 8 is moved up and down, and the cloth support plate 2 and the cloth presser 6 are moved back and forth and left and right to sew the cloth A to be sewn, whereby the folds C of the cloth A to be sewn are fixed. The above is the case of forming three folds, but the upper fold forming spatula 11 is lowered to the top of the middle fold forming spatula 11 in advance and two upper and middle fold forming spatulas are formed. When 11 are piled up, two folds are formed.

The height H of the fold ridge Ca is set by the depth of penetration when the fold forming spatula 11 advances and enters between the cloth support plate 2 and the cloth retainer 6, and the depth of the fold valley Cb. The depth D is set by the engagement depth when the spatula-forming spatula and the spatula-forming spatula are meshed with each other, that is, the amount of advancement of the spatula-forming spatula and the adjustment of the front and rear positions of the spatula-forming spatula.
Further, when the fold forming spatula and the fold forming spatula are engaged with each other, the vertical intervals of the three fold forming spats are compressed, and the vertical intervals of the fold forming spatula are also compressed accordingly. It is desirable to reduce the shift of the folds C, and the height H of the folds Ca and the depth D of the folds Cb are set more accurately.

(Embodiment) In FIG. 1, a cloth supporting plate 2 for supporting a cloth to be sewn, for example, a curtain A from below is slidably placed on the upper surface of a table 1, and the curtain is provided above the cloth supporting plate 2. A
Is provided with a cloth pressing device 3 for pressing the cloth from above, and the cloth supporting plate 2 and the cloth pressing device 3 sandwich the curtain A therebetween, and integrally move the table back and forth and left and right. The cloth pressing device 3 includes a pair of left and right holder arms 4 and 4 (see FIG. 2) integrally connected to the cloth support plate 2 and a front end portion thereof (a right side in FIGS. 1 and 2 is a front side). And a pair of L-shaped levers 6a, 6a, which are swingably attached to the left and right rear edges of the guide plate 5 and extend forward, and a pressing bar 6b fixed between the tips thereof. And a holding air cylinder 7 swingably mounted on the holder arms 4 and 4, and the tip of a piston rod 7a of the holding air cylinder 7 has the above-mentioned shape. L-shaped lever
The cloth presser 6 is connected to the tip of a short arm 6c protruding upward from the base of 6a, and the cloth presser 6 swings up and down in accordance with the operation of the air cylinder 7. A sewing machine needle 8 is provided above the cloth pressing device 3 so as to be able to move up and down, and a window 5a and a groove 5b that allow the sewing machine needle 8 to move up and down are formed in a desired shape on the guide plate 5. Further, in front of the sewing machine needle 4, four pressing needles 9 which are moved up and down by driving an air cylinder (not shown) are provided, and when the pressing needles 9 descend, a gap between the front edge of the guide plate 5 and the pressing bar 6b is provided. Enter 10.

In front of the table 1, three pleats 11 for forming folds are provided in parallel with each other, with their edges 11a in the width direction facing the rear side, that is, the table 1 side, and in three stages vertically. As shown in FIG. 2, the presser needle 9 is provided on the fold forming spatula 11.
Corresponding to the above, four needle grooves 11b are provided in the front-rear direction, and one end thereof is opened to the edge 11a. Then, the front edge of the lower fold forming spatula 11 is fixed to the upper surface of the inverted L-shaped spatula support 12 as shown in FIG. The piston rod 13a of the spatula tightening air cylinder 13 fixed to the center of the lower surface of the spatula support 12 penetrates through the central portions of the lower and middle fold forming spatula 11 to project upward, and the projecting end has the upper stage. The center of the fold forming spatula 11 is connected.
Of the total four guide rods 15, 16 inserted into the left and right sliding guides 14 fixed to the left and right sides of the spatula-tightening air cylinder 13, the inner two guide rods 15 are It penetrates through the lower and middle fold forming spatula 11 to project upward, and the projecting ends are connected to two places near the center of the upper fold forming spatula 11 and further to the above four guide rods 15 and 16. Outer two guide rods 16 penetrate the lower fold forming spatula 11 and project upward, and the ends of the middle fold forming spatula 11 are connected to the projecting ends. Then, flange-shaped stoppers are provided on the lower ends of the two inner guide rods 15 and the two outer guide rods 16, respectively.
15a and 16a are fixed, and the inner stopper 15a abuts the lower surface of the outer stopper 16a. Therefore, when the piston rod 13a of the spatula-tightening air cylinder 13 projects upward, the upper fold forming spatula 11 rises, which causes the inner guide rod 15, the lower end stopper 15a and the outer stopper 16a, and the outer guide rod 15. When the middle fold forming spatula 11 is pushed up via 16 and the piston rod 13a is retracted, the upper fold forming spatula 11 is lowered, whereby the inner guide rod 15 and the outer guide rod 16 are moved. It is pushed down in order. In addition, a pleated air cylinder 17 is connected to the vertical portion of the inverted L-shaped spatula support 12, and the fold forming spatula 11 is driven to move to the standby position shown in FIG. 1 and FIG. It reciprocates between the lower space of the cloth presser 6 at the rear.

In FIGS. 1 and 2, between the spatula forming spatula 11 at the standby position and the table 1, two spatula forming spatula 21 are provided.
However, the edge 21a in the width direction is provided forward, that is, toward the fold forming spatula 11 side. That is, a piston rod 22 and two guide rods 23, 23 that are driven by an air cylinder for forming a fold valley (not shown) to advance and retreat in the width direction are arranged on the front side of the table 1 and these pistons are arranged. A spatula support plate 25 that is long in the width direction is fixed to the tips of the rod 22 and the guide rod 23 via a connector 24, and a plurality of vertically movable guide rods 26 are provided below the spatula support plate 25. Spatula for forming the upper and lower folds
21 are provided at intervals and so that they can be pushed down elastically. In addition, the two fold forming spatula 21 are fixed to the guide rod 26 which is urged by the spring in the spring case 27 on the spatula supporting plate 25 and protrudes, so that the upper fold forming spatula 21 is formed. Spatula 11 for forming the upper and middle folds
The height is set so that the spatula 21 for forming folds in the lower tier is located at the middle height of the spatula 11 for forming folds in the middle and lower tiers, respectively. Then, the fold forming spatula 21 advances and retreats in the width direction between the position shown in FIG. 2 and the standby position at the side (upper part in FIG. 2) by sliding of the piston rod 22.

In the above structure, when the fold forming spatula 11 is in the standby position shown in FIG. 1 and the fold forming spatula 21 is in the side standby position (above FIG. 2), the above three folds are formed. Spatula for mountain formation
The curtain A is hooked on the edge 11a of 11 and then the fold forming spatula 21 is advanced from its standby position to the operating position shown. Then, as shown in Fig. 4, a spatula for forming a fold mountain.
11 is advanced toward the spatula forming spatula 21 and the spatula forming spatula 11 and the spatula forming spatula 21 are engaged with each other to form the curtain A.
Form folds on. Then, the spatula-tightening air cylinder 13 is driven to lower the upper and middle fold forming spatula 11 and the two fold forming spatula 21 respectively, and the interval between the spars 11 and 21 is compressed. The valley forming spatula 21 is retracted to the side standby position and the fold forming spatula 21 is pulled out from the fold forming spatula 11 between the three fold forming spats 11 as shown in FIG. Hold the curtain A in between. Subsequently, the fold forming spatula 11 is moved forward again, and is inserted between the cloth support plate 2 and the cloth presser 6 on the table 1 as shown in FIG. Then, by driving the pressing air cylinder 7 (see FIG. 1), the cloth presser 6 is swung downward to press the folds of the curtain A as shown in FIG. 9 is lowered to pierce the fold portion, the fold forming spatula 11 is first retracted to the standby position, and the pressing needle 9 is further raised to the standby position, and then the curtain A is driven by the sewing machine. The folds of the are sewn together.

In the above embodiment, a spacer is sandwiched between the sliding guide 14 for the fold forming spatula 11 and the inner stopper 15a, and the upper fold forming spatula 11 is lowered to the middle position so that the upper and middle stages. By stacking the two sheets of the above, the three fold forming spatula 11 become substantially two sheets.
Two folds are formed by the joint work of one fold forming spatula 11 and two lower fold forming spatula 21. That is, the three mountains are transformed into the two mountains. Further, the mounting position of the spatula support 12 with respect to the air cylinder 17 for folds can be changed in the front-rear direction so that the height H of the folds (see FIG. 8) can be adjusted. Further, the depth D of the fold can be adjusted by changing the mounting position of the fold forming spatula 21 with respect to the connector 24 for the fold forming spatula 21 in the front-back direction.

(Effect of the Invention) The present invention provides three fold forming spatulas and two fold forming spatulas on the front side of a table of a sewing machine, and a fixing needle for a cloth to be sewn above the table. Can be set up and down freely,
When a cloth to be sewn such as a curtain is hung so as to cover the edge of the fold forming spatula, one fold forming spatula and one fold forming spatula are alternately engaged with each other to form the sewn cloth.
The folds such as the ridges and the three ridges are formed, and the folds are carried by the fold forming spatula between the cloth support plate and the cloth retainer on the table of the sewing machine and sandwiched between the cloth support plate and the sewn fabric. It is fixed by piercing the above-mentioned fixing needle, and then the fold forming spatula and the fixing needle are returned to the original state, and after that, sewing with a sewing machine is started, so that the height of the fold and The depth of folds is set automatically,
A uniform product having no variation in these sizes can be efficiently and easily produced. Moreover, of the three fold forming spats, the upper one can be lowered and stacked on the lower one, so when the upper fold forming spatula is set in the raised position, the three folds are folded. It can be formed, and when set in the lowered position, it can form two folds of folds.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a front view of FIG. 1, and FIGS. 4 to 7 are main parts for explaining the operation. A side view and FIG. 8 are perspective views of the folds of the cloth to be sewn (curtain). A: Cloth to be sewn (curtain), 1: sewing machine table, 2: cloth support plate, 3: cloth pressing device, 6: cloth pressing, 8: sewing needle, 9:
Fixing needle, 11: spatula forming spatula, 11a: edge, 11b: needle groove, 21: spatula forming spatula, 21a: edge.

Claims (1)

[Claims] 1. A sewing machine having a cloth support plate and a cloth presser for holding a cloth to be sewn and moving back and forth and left and right along a table top surface of the sewing machine, wherein the table side is formed of a flat plate on the front side of the table. 3 fold-forming spatula with a widthwise edge facing the sewing machine and needle grooves in the front-rear direction that open at multiple points of this edge are vertically parallel and descend the upper fold-forming spatula. In order to allow it to be stacked on the middle fold forming spatula, and to be able to advance and retreat in the front-back direction between the space between the cloth support plate and the cloth retainer and the standby position in front of the table. Between the fold forming spatula at the standby position and the table, there are provided two fold forming spatula formed of a flat plate and having an edge in the sewing machine width direction facing the fold forming spatula side. Between the front and side standby positions It is installed so that it can move back and forth in the thin width direction, and the needle for fixing the cloth to be sewn is raised and lowered above the plurality of needle grooves of the fold forming spatula that have entered between the cloth support plate and the cloth retainer. A foldable device for a cloth to be sewn in a sewing machine, which is provided freely.