JPS58136805A - Formation of bead flange hole - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bead hole forming device for a sewing machine for making bead pockets, and particularly to a bead hole forming device for making bead pockets sloping in the upper and lower inner baskets of jackets, etc. This relates to a forming method.

Conventionally, in order to form a bead pocket, the first
・As shown in Figure 1, bend both sides of the welt hole WO, and use sewing machine N with two needles (first cause) to form two parallel stitches at both ends, while sewing the middle between the two needles. The sewing machine automatically stops when a seam of a predetermined length is formed by cutting open the space between both seams with a center knife M placed in Cut both ends of the incision S (1 into a V-shape YO, Y
I try to make an incision at l. .

However, the underarm part of the suit shown in Figure 1θ) PI.

When forming a bead hole with a vertically sloping shape as shown in P2, due to the clothing design, the pocket both ends Kl
, K2 must always be aligned vertically, so the stitches at this time should be aligned with the incision S1 as shown in Figure 12.
The shape formed by the two seams Q and Q along the line and the line connecting both ends must be a parallelogram. Therefore, when forming both stitches along the cloth feeding direction G in a parallelogram shape with a double needle as described above, the method is as shown in, for example, Japanese Patent Publication No. 15.6 of 1983, etc. As shown in FIG. 12, first, only one of the two needle bars (corresponding to the lower stitch G in FIG. 12) is driven in the section Dl, and then both needle bars are driven in the section D2. The desired stitch is obtained by driving the needle bar 1 and then driving only the other needle bar (opposed to the upper stitch in FIG. 12) in section D3. Therefore, in contrast to the case of forming a seam for a normal pocket shown in FIG. 1I, when forming a seam for an inclined pocket shown in FIG. The length of the pocket incision was 4
1. If the width from the incision to one seam Q is taken and the inclination angle of the pocket is θ, then 1. x=J31-g O=h t
aiθ. From this, in order to accurately align the incision position of the corner knife with both ends of the incision S1 in the inclined pocket, it is necessary to increase the distance between the corner knives by the above ht-.

However, in the conventional method, the distance between the corner knives must be manually corrected every time the inclination angle θ of the pocket is set, and this adjustment work 1 is extremely complicated.

In the present invention, the adjustment operation described above is automatically performed in accordance with the setting of the inclination angle θ of the pocket. An object of the present invention is to provide a method for forming a bead hole.

Hereinafter, the present invention will be described in detail with reference to the drawings. In FIG. 1, a sewing machine having two needles N spaced apart from each other in a direction perpendicular to the cloth feeding direction is mounted on a table 1. Although not shown, this sewing machine For example, the needle bar of
A means for selectively stopping one of the two needle bars, as shown in Japanese Patent No. 6, is provided.

A workpiece conveying device 2, which is disposed on a table 1 so as to be movable along the cloth feeding direction of the sewing machine, has a screw shaft 4 connected to a screw hole (not shown) formed in a support frame 2a that hangs below the table 1. Engage and connect the body fabric at its right end (Fig. 1) in the upper blade of the table.

[Mi Support the gripper 8 that holds the hem cloth.] The screw shaft 4 is driven by the stepping motor STMI to a preparation position (sixth
), the first position (81, A), which is located further ahead in the cloth feeding direction and is the end point of the stitching; can be moved to the second position (Fig. 9) where it should be inserted.

The center scalpel M cuts open the material to be sewn between the two stitches at an intermediate portion between the two needles N in conjunction with an operating mechanism (not shown) disposed below the bed to form an incision SO. It is possible to appear and retract from the bottom of the table to the top.

The support 7 fixed below the table 1 has its tip facing the lower side of the table 1 ahead of the sewing section of the sewing machine in the cloth feeding direction, and is a movable body that can move parallel to the cloth feeding direction ahead of the support 7 in the cloth feeding direction. 8 is supported on the machine frame.

A connecting body 9 is loosely fitted into the connecting portion 8a projecting upward from the movable body 8 and the support frame 2a of the sewing material conveying device 2, and is arranged parallel to the screw rotation number and slidably along the cloth feeding direction. do. The right end (Fig. 1) of the connecting body 9 is a free end to which a locking portion 9a is fixed, and the left end is fixed to a coiled spring lO whose one end is fixed to the machine frame to apply a rightward acting force. Further, the locking means CP is operated by the action of the air cylinder ACI fixed to the support frame 2a, so that the support frame 2a and the connecting body 9 can be engaged. The protrusion 7a of the support body 7 supports a first rotating body 5 rotatably about a vertical axis, and the moving body 8 supports a second rotating body 6 rotatably about a vertical axis. , the first and second rotating bodies 5 and 6 are provided with a gear 5a and a gear 6a that mesh with each other so as to rotate at a constant speed about their respective rotational axes, and the gear 5& is provided with a stepping motor STM2 fixed to the support 7. A gear 11 whose rotation is controlled by is in mesh.

Further, the first and second rotating bodies 5 and 6 are arranged so that they are opposed to each other in pairs on parallel lines to the cloth feeding direction.
Zr', -', @tutsu (3 m) support hole 5 b t 5 c + 5 d and hit that penetrates vertically at a predetermined rotation angle
ib, o'c, and ea are bored, and three types of corner knives with different opening angles of the V-shaped opening ends correspond to the inclination angle θ of the pocket, and the support holes of each pair of both rotating bodies are On the other hand, when a pair of corner knives face each other on a line parallel to the cloth feeding direction, their V-shaped opening ends face outward from each other. , a pair of corner knives facing each other are pushed upward by the action of air cylinders AC2 and AC3, which are respectively fixed to the movable body 8.

An air cylinder AC4 fixed to the machine frame has a plunger fixed to the movable body 8, and is biased to move the movable body 8 to a position where the gears 5a and 6a of the first and second rotating bodies 5 and 6 mesh,
When the locking portion 9a of the connecting rod 9 engages with the connecting portion 8a, the movable body 8 moves upward in the cloth feeding direction following the locking portion 9a.

In front of the first rotary body 5 in the cloth feeding direction, a substantially dogleg-shaped arm body 18 whose intermediate portion is rotatably supported on the machine frame around a vertical axis has one end attached to the outer peripheral surface of the first rotary body 5. A sliding roller 19 is supported rotatably around a vertical axis, and is disposed at the other end of the arm body 18 so as to be opposed to the moving path of the connecting rod 9. A stopper 18a is provided which restricts the backward movement of the connecting rod 9 in the cloth feeding direction by contacting the locking portion 9a, and this stopper 18a is connected to the adjustment knob 1.
The connecting rod 9 moves along the moving path by the rotation of the connecting rod 8b or the swinging of the arm 18. Further, the arm body 18 receives an acting force that constantly presses the roller 19 against the outer circumferential surface of the first rotating body 5 by the spring 28 . On the outer periphery of the first rotary body 5, which the roller 19 is in pressure contact with, there are adjusters 20, 21, 22 of different thickness corresponding to each corner knife, and the corresponding corner knives 16, 14, or 12 are arranged parallel to each other. The adjustment bodies 21 and 22 are each fixed at a rotation angle at which the rollers 1 and 9 engage when they are positioned on the line, and the adjustment bodies 21 and 22 have approximately the same thickness, and the thickness is different from the thickness of the adjustment body 20. , mux ==-ht7(
h: Width between stitch Q and incision 81 in FIG. 12, θ・
：The inclination angle of the bead edge in Fig. 12) The stopper 18 is added by the roller 19 and the arm body 18 by the angle of inclination of the bead edge in Fig.
The thickness is increased so that b is moved in the cloth feeding direction.

Next, the electric circuit of this invention will be explained.

In FIG. 5, OSW is an operation switch for starting and stopping the sewing machine. DSI is the stitch length L (11th.
12), and DS2 is the digital switch motherboard for setting the data corresponding to θ in FIG. 12! The MC is mine. It is a black computer, OSW, 'DS
l, DS2 information is input and each operating circuit DH+, D
Stepping motor STMI via R2, AD, MD
, STM2. Air cylinder AC1~4. Performs drive zero stop control of motor M connected to the main shaft of the sewing machine. In particular, the setting value of the digital switch DSI corresponds to the control of the needle bar drive stop device and the rotation control of the stepping motor STM2 (not shown), and is determined by the inclination angle of the pocket (Fig. 12) (Fig. 12). Corresponding to that θ, it is for making the Nermes face each other at the working position. Other control sequences are described in detail in, for example, the specification of Japanese Patent Application No. 53-69129 filed by the present applicant, so below, the method for setting the width between the corner knives in the opposing state will be explained with reference to FIGS. 6 to 9. I will use it to explain. Now, it is assumed that the distance between the engaging body 9a of the connecting rod 9 and the connecting portion 8a of the movable body 8 is a constant value X. Let's then form the bead of a long seam. Then, the problem becomes when to operate the air cylinder Act and lock the support frame 2a of the sewing material transport mechanism 2 and the connecting rod 9 by the locking mechanism. For example, when a stitch of length J is formed after sewing starts, air cylinder Ac
If t is turned on (Fig. 7), the distance between the engaging body 9a of the connecting rod 9 and the connecting part 8a of the movable body 8 is X-(L-〆) when a long stitch is formed. Yes (Figure 8). As can be seen from FIG. 8, the distance the cloth must be conveyed from the sewing end position to the protruding position of the corner knife is constant regardless of the stitch length L. Moreover, as can be seen from FIG. 11, the width tl of the corner knife to be set.

(FIG. 9) is tz=L-za (a is the width of the corner knife as shown in FIG. 11.12).

From these facts, the distance traveled by the movable body 8 in the cloth feeding direction from FIG. 8 to FIG.
10ds), and if the initial width between the corner knives is 10, then in order for the width between the corner knives to be appropriate for many stitches, D - (x - L + o') = t 1
-t 0 = L-2 (1 - t O must be satisfied.

From now on, it will be Me D + 2 d 10t O-x, and Sunawachi Microphone Viewer ytC (hereinafter My:l >
The value of d r tO, D + x is set as a constant in d r tO, D + x, and the operation timing d of the air cylinder hc regardless of the stitch length L is stored.

Conversely, if we transform the above equation, we get tl=L-2d=D+L+(+t
o -x The microcomputer MC keeps the value constant! If you set it as Δtl=-cX, considering X as a variable.

That is, the position of the stopper 18a is changed to the left by %X (first
If you shift it to the figure), the distance between the two and three female
Increase by X.

In one embodiment of the present invention, the above principle is used.

Next, the present invention will be explained in detail.

First, as shown in Fig. 11, the incision S is made with a corner knife.
A case will be described in which a bead hole is formed such that the opening edges formed at both ends of O are substantially perpendicular to the longitudinal direction of the cutout SO. As shown in FIG. 1, with the gear 5a of the first rotating body 5 and the gear 6a of the second rotating body 6 meshing, the stitch length is set to the digital switch DS2, and the digital switch DSI is set to the stitch length. By setting "0", the stepping motor STM2 rotates so that the corner knife 16 of the first rotating body 5 and the corner knife 17 of the second rotating body 6 are opposed to each other in the operating position. Then, the adjusting body 20 fixed to the outer periphery of the first rotating body 5 comes into contact with the roller 19. Then, the knob 18b of the arm body 18 is rotated so that the distance between the engaging body 9& of the connecting rod 9 and the connecting part 8a of the movable body 8 becomes a predetermined value X (FIG. 6).

After the selection and positioning of the corner knives 16 and 17 are completed in this manner, the body material MO is set on the sewing material conveying device 2 as is well known, and the sewing machine is started. When the sewing material conveying device 2 is sent to the position shown in Fig. 6, the sewing machine is activated to start sewing, and at the same time, the center knife M is activated to cut a straight incision SO into the body material MO and the cloth WO. . When stitches = D+2a+to-x are formed, the air cylinder ACI is activated and the locking mechanism CP engages the connecting rod 9 with the sewing material conveying device 2 (FIG. 7). From then on, the connecting rod 9 is driven by the sewing material conveying device 2.

When a stitch of length L is formed, the sewing machine will automatically stop,
At this time, the distance between the engaging body 9a of the connecting rod 9 and the connecting part 8a of the movable body 8 is reduced by x-(L
- area) (Figure 8). Thereafter, the sewing material conveying device 2 is conveyed by a certain distance D (FIG. 8) in the cloth feeding direction, but only when the sewing material conveying device 2 has conveyed x-(L-cl) The engaging body 9a of 9 is the movable body 8
Thereafter, the movable body 8 is driven by the sewing material conveying device 2 via the engaging body 9a of the connecting rod 9, and the gear 5a
, Qa are disengaged, and the second connecting body 6 moves in the cloth feeding direction (to the left in FIG. 1). Then, when the sewing material conveying device 2 finishes moving a certain distance, the stepping motor S
TMI stops and transport ends. At this time, the rear end of the incision SO in the cloth feeding direction is located exactly above the center knife 14, but on the other hand, the movable body 8. That is, since the second connecting body 6 has moved by D-(x-L+〆) in the cloth feeding direction, the center knife 15 is different from the center knife 14 by D-(x-L 0('() 10 to
The distance will be . However, due to the microcomputer MC, 5=D+2
Since it was set as d+t 07X, the above distance is L
-2d, and the corner knife 15 is located exactly at the tip of the incision SO in the cloth feeding direction. At this time, the air cylinders AC2 and ACa are activated simultaneously, and as shown in FIG.
o.

Y i wo JE4. After this, air cylinder AC4
At the same time, the locking mechanism CP is released and the entire device returns to the state shown in FIG. 1.

Next, as shown in 12th rjJ, V-shaped grooves Y2. A case will be described in which a bead hole is formed such that Y8 is inclined with respect to the longitudinal direction of the cutout S1.

Assuming that the stitch length is the same as above, and setting the digital switch DSI to a predetermined value corresponding to the inclination angle of the pocket opening shown by Wl in FIG. The corner knife 14 of No. 5 and the corner knife 15 of the second rotating body are rotated so as to face each other in the operating position. Then, instead of the adjusting body 20, the adjusting body 21 fixed to the outer periphery of the first rotating body 5 comes into contact with the roller l-9, but since the adjusting body 21 is formed thicker than the adjusting body 20 by a predetermined amount, The stopper 18a is pushed forward in the cloth feeding direction by an amount of X = htan19 (I is shown in FIG. 12) via the roller 19° arm, and the engaging member 9a of the connecting rod 9 is also pushed by an amount of △X. Left side (
Therefore, the set value X in FIG. 6 becomes X-ΔX.

In this way, when the body material M1 and the welt w1 are set on the sewing material conveying device 2 and the sewing machine is started, the digital switch D
In relation to the setting value of SI, as shown in Fig. 12, one needle bar is controlled to stop driving during the sewing period, and in the end, two stitches of length L with different starting points are made. will be formed. Since the following operating conditions are the same as those for forming the beading shown in FIG. 11, the description will be made based on the state in which seam formation is completed as shown in FIG. 8, omitting the intermediate steps.

The seam in Figure 12 and the seam in Figure 11 are equal in that the length of the seam is L, but in the seam in Figure 12, one seam is different from the other. Since the stitches are formed at different angles, the overall fabric feed amount until the seam formation is completed is longer in Fig. 12, and therefore the cutting amount of the center knife M is longer by ht- for the welt edge in Fig. 12. . Now, as shown in FIG.
In the case of the bead hole shown in the figure, the distance between the center knives is D-(x-
However, in the case of the beaded hole shown in FIG. Since the initial distance X (Fig. 6) with 8a is set in advance to X-△X, in this case, the distance between center knife 14. . However, the ward is set to a certain value by the microcomputer MC.
-x, so by substituting this equation into the above equation, the distance between the center knives 14 and 15 is L -2d+b, x
-L -2d +htanθ, and the increment △X'-htanθ of the incision S1 with respect to the incision SO in Fig. 12 is compensated, and the air cylinder AC2
, AC8 to make both ends of the incision s1 V
Letter-shaped incision Y2. Y8 is formed.

Next, other embodiments of the invention will be described.

This embodiment differs from the above embodiment in that the distance between the corner knives is adjusted by electrical control of a microcomputer MC. That is, in FIG. 8, the arm body 18 and the adjustment body 20
．． 21 and 22 are removed and shown in Fig. 6 (not shown).
The stoppers 18a are fixed to all 91 frames so that the distance from the connecting portion 8a is a constant distance X.

When the engagement timing between the support frame 2a and the connecting rod 9 is p (q indicates the stitch length after the start of stitch formation) as shown in FIG. q(θ) corresponding to the angle θ
-Me ht anθ (cl is the support frame 2 in the above embodiment
The microcomputer MC is programmed to store the engagement timing or the arithmetic expression in advance in the storage section of the microcomputer MC so as to set the engagement timing based on the arithmetic expression (the engagement timing between the connecting rod 9 and the connecting rod 9). As a result, as shown in the above implementation, the distance between the corner knives is D-(X-
However, the movement of the second rotating body is controlled based on the data in the storage unit, and the distance between the corner knives becomes I, -240 htan θ. Therefore, the corner knife The width between them will be corrected.

As described above, according to the present invention, in the bead hole forming device which is G-shaped so as to form a bead hole that is vertically inclined by selecting a corner knife, the cam is Since the distance between the corner knives can be automatically adjusted by means or microcomputer control, the distance between the central incision and both ends can be adjusted even for an inclined pocket hole without requiring any adjustment by the operator. A beautiful bead hole can be formed in which the incision end matches the V-shaped incision.

In both of the embodiments described above, the width between the corner knives is set by moving the second rotating body by connecting the sewing material conveying device to the connecting rod via the locking means.
For example, a dedicated actuation means (stepping motor, servo motor, linear motor) for moving the second rotary body is separately provided, and the width between the corner knives is set by operating this actuation means under the control of the microcomputer MC. You can also do this.

[Brief explanation of the drawing]

1 and 2 are front views of the bead hole forming device according to the present invention,
Figure 3 shows the rotating body, rollers, and arms. FIG. 5 is a block diagram of the control circuit; FIGS. 6 to 9 are diagrams showing each stage of transporting the sewing material;
FIG. 10 is a view of a suit with diagonal pocket holes, and FIG. 11 is a partially sectional plan view of a bead hole whose opening edge is perpendicular to the central cutout. Name of agent: Patent attorney Nagoya-Yu 1 Written amendment 1 Indication of the case 1983 Patent Application No. 18337 2 Name of the invention Method for forming beaded holes Address 1 person, 8-2 Kokuryo-cho, Chofu-shi, Tokyo
Name (339) Ryoutosou ME Electric Co., Ltd. Representative Director Makoto Uchiyama 4 Deputy Representative 182 Address 8-2-15, Kokuryo-cho, Chofu-shi, Tokyo
May 25, 1980 6 "Brief explanation of drawings" column of the specification subject to the amendment 7 Contents of the amendment As shown in the attached sheet 1 Figures 1 and 2 show the bead hole according to this invention Forming device 11:
, a top view, and FIG. 3 shows the rotary body, roller, and arm body. Figure 4 is a diagram showing the relative state of the stopper, Figure 4 is a diagram showing the positional relationship of the corner knife, Figure 5 is a block diagram of the control circuit,
Figures 6 to 9 are diagrams showing each stage of transporting the sewing material, Figure 10 is a diagram of a pocket hole with diagonal pocket holes, and Figure 11 is a welt hole whose open edge is perpendicular to the incision in the center. 12th partial cross-sectional plan view of
The figure is a partially sectional plan view of a bead hole in which the opening edge is inclined with respect to the central cutout. ”

Claims (1)

[Claims] A sewing machine with a twin needle is operated to sew two stitches on the body of the cloth laterally parallel to the cloth feeding direction and separated in a direction crossing the cloth feeding direction. Make an incision of a specific length in a straight line parallel to the fabric feeding direction between the i eye lines, and use a pair of V-shaped corner scalpels that open outward at both ends of the incision to make the incision in the lateral direction of the body. Increase the moving distance in accordance with the size of the inclination angle, move in the cloth feeding direction to correspond to both ends of the incision, operate both corner knives, and cut V-shaped notches at both ends of the incision. How to form a bead hole.