JP3013835U - Curve stitch machine for multi-needle sewing machine - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The curved pattern set in the control means is smoothly stitched by the operating means and the feed dog drive mechanism to perform continuous machining of the curved pattern. [Structure] A tooth receiving arm 3 rotatably supporting a large number of feed dogs 1 is supported at a single point on the axis center, and is alternately applied to the left or right by a pair of wires 19 of an operating means 26. Needle plate 23 configured to press and having a guide groove 9 communicating with a widened portion for allowing left and right movements of the feed dog at a seat provided on the sewing machine table A above the tooth receiving arm.
The sewing machine table is formed by arranging the parts downward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a machine for continuously processing a curved pattern on a material to be processed by multi-needle sewing through a control means and an operating means in which a curved pattern is set in advance.

[0002]

[Prior art]

 Japanese Patent Laid-Open No. 63-63488 discloses a material feeding mechanism having an adjustable feeding direction for a sewing machine using a single sewing needle. In the case of the above, since each feed dog is built-in integrally, in the case of multiple needles with two or more needles, it is difficult to turn to the left and right like a car without a working gear and it is difficult to rotate. It has the drawback of not being smooth. Therefore, if the operator does not assist the operator in bending the work material by following the change of the direction of the material slider to the left or right, the work material will be fed in the straight direction and the correct curve will be obtained. There was an inconvenience that the pattern could not be sewn.

[0003]

[Problems to be solved by the device]

 The problem to be solved by this invention is to automatically and continuously apply an S-shaped or other similar complicated curved pattern by individually making the feed dogs of the feed dog drive mechanism of the sewing machine free. It is an object of the present invention to provide a pattern stitching mechanism for multiple needles.

[0004]

[Means for Solving the Problems]

 The technical means taken by the present invention to solve the above-mentioned problems is that the tooth receiving arm for multi-needle sewing is supported by the swing arm of the sewing machine table by the one-point support so as to be rotatable left and right and has the relief portion. A plurality of long and short feed dogs are individually rotatably attached to the tooth receiving arm, and a needle plate having a guide groove for horizontally swinging each feed tooth is provided facing the tooth receiving arm and the guide is provided. For each groove, a diverging widened part that follows the swing of the tooth receiving arm to rotate the feed teeth in the same direction all at once is provided, and it is opposed to the driven side of the tooth receiving arm via the arm. Each end of the wire is supported, and the base of the wire is connected to a pair of rack rods that mesh with the pinion of the forward / reverse rotation motor with a curve detection sensor. Set control means and Via the actuating means configured to perform a continuous curve pattern to be processed fabric material.

[0005]

[Action]

 The work material is fed between the presser foot on the sewing machine table and the needle plate, and the work material is sewn by the feeding operation of the elliptical locus by the feed dog group and the movement operation of multiple sewing needles. Therefore, the actuating means begins to operate following the control means in which the necessary curved pattern is set, and the tooth receiving arm during the feeding movement of the workpiece is tilted leftward or rightward in the plane. By this operation, the feed dog group moves in the cloth feed direction while engaging with the narrow portion of the guide groove, and when it reaches the widened portion connected to the guide groove, each feed tooth is set as the tooth receiving arm. Tilt all in the opposite direction. At this time, since each feed dog is free, the stitch interval between adjacent feed teeth gradually decreases from the one that is closer to the inside of the curve where each feed tooth curves, and the stitch interval increases gradually as it goes outward. Since the feeding movement is performed while changing each other, the cloth material to be processed is smoothly curved to correctly and continuously machine the curved pattern as instructed by the control means.

[0006]

【Example】

 An embodiment will be described below with reference to the drawings. As shown in FIGS. 1, 2 and 3, a forward and reverse rotatable motor (14) includes a bracket (15) at a lower portion of a sewing machine table (A). The motor (14) has a detection sensor (not shown) for detecting a curved pattern, and a pinion (17) provided on the output shaft (16) has a pair of rack rods (18, 18) are engaged with each other, and the base ends of the flexible wires and other wires (19, 19) are connected to these rack rods (18), respectively, and the operation of extending these wires (19, 19) is performed. The ends (20, 20) are rotatably supported by the guides (22, 22) attached to the bar (21a) of the arm (21) fixed to the lower part of the sewing machine table (A), and the operating means (26). Make up.

The feed dog (1) shown in FIG. 1, FIG. 3 and FIG. 4 has a relief portion (1b) in each of them, and at the bottom thereof, a tooth receiving arm (3) via a vertically extending shaft (2). The shaft hole (4) is rotatable and communicates at a right angle with the screw hole (5) provided on the side surface of the tooth receiving arm (3) at a right angle. When the shaft (2) is fitted into (4), the shaft (2) communicates with the annular groove (6) provided in the shaft (2) so that the shaft (2) and the screw hole (5) have a protrusion (7). By screwing (8) and engaging the protrusion (7) with the annular groove (6), the feed dog (1) moves downward on the needle plate (23) described later with the shaft (2) at the center. The feed dog (1) has a long tooth and a short tooth which are alternately arranged while engaging with the open guide groove (9) vertically and swingably. Is provided only at the tip of each feed dog (1), and the remaining part is provided as a relief (1b). By not doing so, a small turn curve can be created for each feed dog (1), and the cloth material to be processed (D) is sent with a small number of tooth rows (C) and the cloth material is not damaged. To form.

As shown in FIGS. 4 and 5, the downward shaft hole (4a) is formed in the center of the lower surface of the tooth receiving arm (3), and the shaft hole (4a) is formed by the pillow material (11). A shaft (2a) having a ring groove (12) at the lower end is fitted into the shaft hole (4a), and the shaft (2a) is inserted into the shaft hole (10) of the bracket (13). ), And a snap ring (27) is fitted in the ring groove (12) protruding outside the lower end of the shaft hole (10) to prevent it from coming off. A screw hole (5a) for fixing the bracket (13) to a swing arm (B) described later via a screw (8a) is screwed to the end in common with the swing arm (B).

The needle plate (23) is detachably arranged on the seat (24) of the sewing machine table (A) as shown in FIGS. 4 and 6, and the needle plate (23) has a normal needle. A large number of guide grooves (9) are arranged in parallel for each group of holes (25), and the extended end of each guide groove (9) goes in and out of each guide groove (9) to form an elliptical shape. The group of the feed dogs (1) performing the movement of the shape trajectory is provided with a divergent widening portion (9a) which can be tilted to the left or right according to a curved line.

The motor (14) is interlocked with a control means (not shown) having a large number of data of necessary curved patterns in advance. Further, the swing arm (B) is linked to a normal feed dog drive mechanism (F), and the swing arm (B) is swung up and down and back and forth around a pivotal support (G). During the continuous feed motion of the tooth receiving arm (3) in an elliptical locus, the feed teeth (1) group of the tooth receiving arm (3) and the presser foot (H) facing the upper surface of the sewing machine table (A). The cloth material (D) to be processed is intermittently pressed against the lower surface and is connected so as to feed the material in the direction of arrow P.

Now, a description will be given of the case where the cloth material (D) fed into the sewing machine table (A) in the direction of the arrow P is given a predetermined curved pattern set in advance by the control means. And the feed dog drive mechanism (F) actuate together with the needle moving mechanism of the above to sew with the sewing needle (J) on the work material (D) on the sewing machine table (A) and the oval shape of the swing arm (B). The movement of the feed dogs (1) group due to the rotational movement of the locus protruding and retracting in the direction of arrow P in each guide groove (9) of the needle plate (23) and waiting above the approaching direction of each feed dog (1). The work cloth (D) is transferred in the direction of arrow P in cooperation with the presser foot (H) that presses the work cloth (D) between each feed dog (1) momentarily. (See Figure 1)

In parallel with this hand movement process, the sensor of the motor (14) continues to detect the curved pattern so that the curved pattern is sewn as set, and the tooth receiving arm (3) is moved back and forth in the horizontal direction about the axis (2a). The cloth material (D) to be processed is continuously swung to a desired curved pattern. At this time, each feed dog (1) moves from the position of the feed dog (1) shown in FIG. 6 and moves along the curve of the control means in the direction opposite to the inclination of the tooth receiving arm (3). Tilt all at once via (26). At this time, as for the feed dogs (1), the stitch interval on the side closer to the curve is gradually changed, while the stitch interval on the far side is increased, and the feed tooth (1a) and the guide groove (9) shown by the chain line in FIG. The curved portion is smoothly sewn as shown in FIG. 7 while the widened portion (9a) of FIG. The feed dog (1a) can perform an elliptical locus feed motion while tilting to the left or right by the curved left or right curve. At this time, each feeding tooth (1) reliably feeds the cloth material (D) to be processed with a minimum hooking amount by the relief portion (1b). The swing motion of the tooth receiving arm (3) to the left and right follows the forward and reverse rotations by the motor (14) of the actuating means (26), and the wires (19, 19) are alternated between the rack rod (18) and the wire (19, 19). Then, the tooth receiving arm (3) is caused to swing left and right with each working end (20).

[0013]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

Since a plurality of feed dogs are rotatably supported on the tooth receiving arm about the shaft so as to be rotatable left and right, the feed teeth are moved in the left or right direction all at once in accordance with the left or right swing of the tooth receiving arm. When swinging, the stitch interval of the feed dogs near the curved side is gradually changed, and the stitch interval of the feed teeth at the far position is gradually changed. Since it can be automatically performed by engaging with the widened portion, the cloth material to be processed can be accurately fed along the curved pattern regardless of the curvature of the curved pattern.

A pair of rack rods are meshed with the small gears of the forward and reverse rotation motors attached to the sewing machine table via brackets, and a pair of wires are connected to each rack rod to connect the respective working ends of both wearers. Since the guides supported by the arm and the bar are provided with actuating means facing the both ends of the tooth receiving arm, the left and right swinging motions of the tooth receiving arm can be performed according to the preset curved pattern. Can be transmitted reliably.

[0016] Each feed dog provided on the tooth receiving arm can be freely swung individually, and since each feed tooth has a relief portion, a variety of curved stitches with a small curvature can be sewn. Not only the curved smock shirring sewing process can be performed easily, but also freely.

[Brief description of drawings]

FIG. 1 is a partial omission of a sewing machine table equipped with the present invention,
It is a partially broken side sectional view.

FIG. 2 is an enlarged side sectional view taken along line XX in FIG.

3 is a partially enlarged plan view of the line ZZ in FIG. 1 with a part thereof omitted.

FIG. 4 is an explanatory view showing an operating procedure of the main part of the present invention.

FIG. 5 is an explanatory view showing the disassembling and assembling procedure of the tooth receiving arm of the present invention with a part thereof omitted.

FIG. 6 is a partially enlarged plan view of the needle plate of the present invention, showing the correspondence with the feed dog.

FIG. 7 is an explanatory diagram showing the outline of curved pattern sewing.

[Explanation of symbols]

 1 Feed dog 2a Shaft 3 Tooth receiving arm 9 Guide groove 9a Widened part 14 Motor 17 Small gear 18 Rack rod 19 Wire 21 Arm 22 Guide 23 Needle plate 26 Actuating means A Sewing machine table D Work material I Arm J Sewing needle

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[Procedure amendment]

[Submission date] December 29, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

Claims (3)

[Scope of utility model registration request] 1. A sewing machine table (A) which is operated through an actuating means (26) for giving a left and right bending feed to a cloth material (D) to be subjected to a preset curved pattern and a control means in which the curved pattern is set. ), A multi-needle sewing machine including a tooth receiving arm (3) having a large number of sewing needles (J) and a needle plate (23) for guiding the feed dog (1) in the left and right curved directions. Curve sewing machine in Japan. 2. A widened portion () which is formed by expanding and extending a guide groove (9) and each guide groove (9) of the same number as the sewing needle (J) below the sewing needle (J) and the arm (I). The needle plate according to claim 1, which has 9a). 3. The action of a pair of wires (19, 19) on the driven side of a tooth receiving arm (3) which can swing left and right around an axis (2a) via an arm (21) and a guide (22). A pair of rack rods (18, 1) that support the ends (20, 20) so that they can move back and forth and that engage the base ends of the wires (19, 19) with the pinion (17) of the forward-reverse rotation motor (14).
8. The actuating means according to claim 1, which is connected to 8).