JPH053976A - Beading machine - Google Patents

Abstract

(57) [Abstract] [Purpose] In a bead sewing device, various shapes of corner cuts are made without replacement of the corner knife. [Structure] When it is necessary to insert the left and right corner females at different angles in order to perform irregular shape sewing such as so-called diagonal sewing or trapezoidal sewing in the bead sewing, first of all,
The knives are operated, and then the other corner knife is operated to move the sewn product, thereby obtaining different cuts by the corner knife. And sewn items,
By changing the operating speed of the knife, it is possible to obtain cuts of various shapes with the same corner knife without exchanging the knife. The operation control of the conveying device and the corner knife for moving the sewn product is performed by a necessary calculation based on the previously input sewing data, and the result is obtained by a control signal from the control means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bead sewing device for making a trimmed pocket opening.

[0002]

2. Description of the Related Art Conventionally, as a technique of this kind, for example, the one shown in FIGS. 8 to 12 has been disclosed as Japanese Patent Publication No. 61-115. FIG. 8 is a front view of a bead hole forming device according to an embodiment of the invention. In this device, as shown in FIG. 8, lining cloths are placed on the body cloth, and while these are held by the sewn material conveying device 12, the motor MO is operated to move from the preparatory position a to the rear of the sewing machine stitching portion. The fabric and the ball cloth are sewn to each other at the first position B, and both of them are cut open together by the center knife 15 to form a linear groove.

Then, when the sewn material conveying device 12 moves from the first position (b) to the second position (c), the second corner knife mechanism 31.
The corner knives 18, 19, 20, 18 of the first corner knife mechanism 21 and the second corner knife mechanism 31, respectively, which are also moved so that the respective ends of the linear grooves are in fixed positions. '1
It is located right above a predetermined corner knife of 9'and 20 ', and in this state, each corner of the first corner knife mechanism 21 and the second corner knife mechanism 31. The scalpels 18 and 18 'ascend and project to the upper surface of the bed 10, and as shown in FIG. 11, arrow blade-shaped V-shaped grooves Y and Y'are provided at both ends of the linear groove S to form a bead hole in the sewing product. It is a thing.

When the diagonal straight groove S '(for forming the diagonal pocket) as shown in FIG. 12 is formed, both side edges Pa, Pa of the pocket lid P need to be attached along the vertical direction in design. Because there is a V-shaped groove Y,
In the first corner female knife mechanism 21 and the second corner female knife mechanism 31, the corresponding predetermined values are set so that the opening edges Ya and Ya 'of the opening formed by pushing Y'open are also in the vertical direction. Each corner knife 19, 19 'having a shape is selected and a predetermined corner cut is performed.

FIG. 9 is a perspective view of the first corner knife mechanism 21, and FIG. 10 is a plan view of the first and second corner knife mechanisms. In this figure, the corner knife is not shown. Each is equipped with three, but it is usually 7 each for actual use.
Corner knives of various shapes are provided for each book. The selection of the corner knife in each corner knife mechanism operates the stepping motor SM, and this rotation is transmitted to the main gear 33, the first gear 34, and the second gear 35, and the first rotating body 1
7. Rotate the second rotator 26 by a predetermined angle and turn it into a predetermined corner.
This is performed by stopping the scalpels, for example, 18, 18 'or 19, 19' at positions facing each other.

[0006]

However, in the above-mentioned prior art, a large number of corner knives on the moving side and the fixed side are provided according to the sewing pattern, and any one of them may be provided as needed. Since the corner knife of that shape is automatically replaced by driving the motor, the complicated mechanism as described above is required, which not only causes trouble but also saves space. However, there is a problem that it cannot meet the demand for cost saving.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a bead sewing device is provided with a two-needle sewing machine mounted on the upper surface of a bed and a sewing operation, a center-knife operation, while pressing a sewing material mounted on the bed. Conveyor device that moves the sewing product in parallel to the predetermined position for corner knife operation, and it is arranged on the axis of symmetry of the needle. A center knife supported on the machine frame and a V-shaped groove that moves up and down individually to open outward of the linear groove at one end of the linear groove, and when the V-shaped groove is pushed open, the linear groove is formed. A pair of left and right fixed corner knives that form various pattern right-angled or oblique opening edges with respect to the longitudinal direction, and the other end of the linear groove that is movable in the cloth feeding direction and individually moves up and down. Open toward the outside of the straight groove
A pair of left and right movable corner knives that form a V-shaped groove and forms a right-angled or oblique opening edge of various patterns with respect to the longitudinal direction of the linear groove when the V-shaped groove is pushed open And calculating means for calculating the conveying speed and the distance of the conveying device from the sewing deviation amount of the sewing data of various patterns, and synchronizing with the pushing-up operation of any one of the corner knife based on the output of the calculating means. And a control means for operating the transport device to control the movement of the sewn product at a predetermined speed at a predetermined speed, or a two-needle sewing machine mounted on the bed upper surface and a sewing machine mounted on the bed. Sewing motion while holding an object,
Conveyor device that translates the sewn product to a predetermined position for performing center knife operation and corner knife operation, and a transfer device that is placed on the axis of symmetry of the needle and cuts a linear groove during the movement of the sewn product. A center knife that is supported on the machine frame so that it can project from and retract from the top of the bed, and a V-shaped groove that moves up and down individually to open toward the outside of the linear groove and is pushed open. When fixed, a pair of left and right fixed corner knives that form right-angled or oblique opening edges of various patterns with respect to the longitudinal direction of the straight groove, and are movable along the cloth feeding direction and individually move up and down. A V-shaped groove is formed at the other end of the linear groove so as to open toward the outside of the linear groove, and when the V-shaped groove is pushed open, it is perpendicular or oblique to various patterns with respect to the longitudinal direction of the linear groove. A pair of left and right movable coils that form the opening edge
Names, a computing means for computing the knife pushing speed from the sewing deviation amount of the sewing data of various patterns inputted in advance, and a sewn product in synchronism with the operation of the carrying device based on the output of the computing means. It is intended to solve the above-mentioned conventional problems by configuring each corner knife with a control means for controlling the operation at a predetermined push-up speed while moving.

[0008]

In the bead sewing device according to the present invention, the conveying device is set to a predetermined value in synchronization with the operation of a predetermined corner knife projecting at a constant angle and a constant speed. By moving the V-shaped groove by a predetermined distance, the line connecting the ends of the V-shaped groove is always in the vertical direction even if the inclination of the linear groove is changed. And the angle are changed, in other words, the angle of the corner knife is relatively changed with respect to the sewn product by the above-mentioned action to form a corner cut having a desired angle and length. It's about to get.

Contrary to the above, the angle change of the corner knife with respect to the sewn product is set on the basis of the sewing content data while keeping the moving speed of the conveying device constant. It can also be achieved by projecting at a certain speed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 is a front view of a bead sewing device according to an embodiment of the present invention, and FIG. 2 is a block diagram mainly showing its control system. In FIG. 1, 10 is a bed and 11 is a bed 1.
A well-known two-needle sewing machine having two needles N arranged on 0, a conveying device 12 arranged on the bed 10 so as to be movable along the cloth feeding direction, and a supporting frame 13 inserted into the bed 10.
A screw shaft 14 rotated by a stepping motor MO driven and controlled by a control signal from a control means via
The sewing material such as the body cloth M and the ball cloth K (see FIGS. 11 and 12) is grasped and driven by the stepping motor MO to move the sewing material to the rear of the sewing portion of the sewing machine 11. It is conveyed to the 1st position (b) and the 2nd position (c). Reference numeral 15 is a center knife, which is interlocked with an operating mechanism (not shown) disposed below the bed 10 along the axis of symmetry of the needles N, N to allow the sewing product to move from the preparation position a to the first position b. In order to cut open a straight groove S as a pocket hole in (the body cloth M and the ball cloth K), it is provided so as to be able to project from the upper surface of the bed 10. 22
Is a guide rod that is supported below the bed 10 so as to be movable along the cloth feeding direction, and is always pulled to the right by a spring 22S. A clamp 24a is provided at the rear end of the transport device 12, and when the transport device 12 comes to the first position B, the clamp 24a is actuated by the action of the cylinder 24 and the guide rod 2 is moved.
2 is gripped, and the guide rod 22 is moved leftward together with the transport device 12. The movable corner females 2a and 2b, which will be described later, are moved to predetermined positions by the clamps 24a and the guide rods 22. Reference numeral 25 denotes a moving body that is loosely inserted in the guide rod 22. The guide rod 22 moves to the left, and the locking body 22a at the tip is the moving body 2.
When locked with 5, it moves to the left. Reference numeral 30 is a return cylinder that returns the moving body 25 to the original position. Reference numerals 1a and 1b denote a pair of left and right fixed corner females that vertically move so as to project and retract from the upper surface of the bed 10 individually or simultaneously by a cylinder 36 as a driving body fixed to the support body 2a. Reference numeral 2b designates a pair of left and right movable corner females which move up and down individually or simultaneously by a cylinder 37 as a driving body which is fixed to the moving body 25 and which protrudes and retracts from the upper surface of the bed 10. The cylinder 36 is connected to the fixed scalpels 1a and 1b and can be operated simultaneously, and can also be moved left and right by the action of a solenoid or the like to be operated individually. Of course, independent cylinders may be provided on the fixed knife 1a and 1b. In addition, the cylinder-37
Is also the same.

As shown in FIG. 3, these fixed corner female left side 1a, right side 1b and movable corner female left side 2a, right side 2b are each adjacent to two corner females. Each pair is provided so as to move up and down separately from the others, and each pair of corner-female groups face each other and are driven by a control signal from the control means at a predetermined position along the cloth feeding direction. It is driven by the controlled cylinders 36 and 37 to perform a predetermined corner cutting operation.

In FIG. 2, the microcomputer 40
Is composed of a central processing unit (CPU) 41 including a calculation means 41a and a control means 41b, a RAM 42 and a ROM 43, and a program for controlling the CPU 41 is written in the ROM 43. The microcomputer computer 40 has a panel switch 44 and sewing data for various patterns shown in FIG.
The input unit includes a transport device forward / backward movement end sensor that detects the moving range of the transport device 12, a sensor that detects the upper and lower ends of the corner knife provided on the cylinders 36 and 37, and the like. In addition, the output device is a carrier device 12 that operates based on a signal from a pulse generation circuit in accordance with an instruction from the control means 41b, a device that drives cylinders 36 and 37 sewing machine 11 that also operates based on a signal from another pulse generator, and the like. .

Next, the overall operation of the apparatus according to this embodiment will be described with reference to FIGS. 1, 4 and 5, and then the corner.
The cutting operation will be described. In FIG. 5, a sewn product such as a cloth and a ball cloth is set in the carrier device 12 and the panel switch 4 is set.
4, the power is turned on, and the sewing data of each of the patterns (a) to (e) of the bead sewing as illustrated in FIG. 4 is input to the RAM 42 of the microcomputer 40. Then, a desired one of the patterns (a) to (e) is selected (step 1). The sewing operation is started and the transporting device 12 moves from the preparation position a to the first position b in FIG. 1, during which the needle N operates and the stitches L, L are formed at both ends of the cloth K as shown in FIG. (Step 2), at the same time, the center knife 1
5, the linear groove S is cut and formed (step 3), and when the transport device 12 moves to the first position B, the clamp 24a operates to grip the guide rod 22 and move leftward together with the transport device 12. To do. Simultaneously with the movement of the guide rod 22, the locking body 22a locks with the moving body 25 and moves the moving body 25 leftward. Then, when the transport device 12 moves to the second position C, the both ends of the linear groove S are just fixed.
Nares 1a and 1b and movable corners 2a and 2b
Since it is positioned right above, the corner cutting is simultaneously performed and V-shaped grooves Y and Y'are formed (step 4), and a series of sewing operations is completed. This
The narrow cut is a normal pattern, that is, a parallel stitch (see (a) of FIG. 4 and FIG. 11), but various patterns illustrated in FIG. 4 are possible.

Next, the corner cut described above with reference to FIGS. 3, 4, 6, and 7 will be specifically described by taking a so-called diagonal stitching pattern shown in FIG. 4 (c) as an example. To do.
In FIG. 6, the formation of the two stitches L, L by the sewing machine and the straight line groove S (see FIG. 4) by the center cut are completed, and they are fixed and movable directly below both ends (one end and the other end) of the straight line groove S, respectively. Corner females 1a, 1b and 2a, 2b
Is confirmed to be located, the fixed corner female right side 1b and the movable corner female left side 2a are projected and retracted on the upper surface of the table 10 as they are, and are the same as the Y2 portion of the V-shaped groove Y. Y '
Cut one part (step 1). Then, the fixed core
The left side 1a of the knife is started to push up at a constant speed (step 2), and at the same time, the conveying device 12 preliminarily inputs the sewing deviation amount in the sewing data (straight line as illustrated as H in FIG. 4). Based on the appropriate speed calculated by the calculation means 41a from the difference in the parallel movement distance from the end of the groove S to each stitch end) and the calculated distance, the movement is performed by the control signal from the control means 41b (step 3). . In step 2 and step 3, the corner knife pushing-up operation and the movement of the transfer device are completely synchronized. That is, at the same time when the sewn product starts to be cut by pushing up the corner knife, the transport device starts to move and continues moving until the corner knife reaches the top dead center. Stops moving when reaching top dead center. Since the sewn product is pressed against the corner knife during the movement of the carrying device, a corner cut line Y1 having a predetermined length and a predetermined angle is formed depending on the moving speed and the moving distance.

Then, in step 4 shown in FIG. 7, the conveying device is returned to the position of step 1 in FIG. 6, and subsequently, in steps 5 and 6, the corner cut line Y'2 is formed. Predetermined V-shaped grooves Y and Y ′ are formed at both ends of the linear groove S. Since the specific operation during this period is the same as that described above, description thereof will be omitted. In addition, patterns such as ((b): diagonal stitching), ((d): trapezoidal stitching), ((e): trapezoidal stitching) shown in Fig. 4 are automatically input by inputting data such as deviation amount. Needless to say, it is formed. If data having no deviation amount is selected at both end portions of the V-shaped groove, a standard V-shaped groove called parallel sewing (see FIG. 4A) is formed.

In the above-described embodiment, the angle of the knife (that is, Y1, Y'1) is set by changing the operating speed of the conveying device while keeping the corner knife pushing-up speed constant.
The angle) was relatively changed to correspond to the deviation, but the speed of the transfer device was kept constant and various patterns previously input.
The same can be done by calculating an appropriate knife thrusting speed from the sewing deviation amount of the sewing machine by the calculating means and changing the corner knife thrusting speed by the control signal from the controlling means based on the output of the calculation result. The effect can be obtained, and the same effect can be obtained by changing the speeds of both the conveying device and the corner-female.

[0017]

As described above, according to the present invention, it is necessary to cut the left and right corner knives at different angles in order to perform irregular shape sewing such as so-called diagonal sewing or trapezoidal sewing in the bead sewing. If there is one, first one corner
By operating the knife, and then moving the sewn product while operating the other corner knife, different left and right cuts are obtained by the corner knife, and the sewn product and the corner are further cut.
By changing the operating speed of the knife, it is possible to obtain cuts of various shapes with the same corner knife without exchanging the knife. Therefore, a complicated mechanism for automatically converting a large number of corner knives, which is required in the conventional art, is not required, and the sewing efficiency is improved, and the size of the device and the cost cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a bead sewing device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a control system of the same.

FIG. 3 is a front view of fixed and movable corner females having a pair of left and right females, respectively.

FIG. 4 is a plan view showing various patterns in bead sewing.

FIG. 5 is a flow chart showing the overall operation of the bead sewing device according to the embodiment of the present invention.

FIG. 6 is a flowchart showing a corner cutting operation by the apparatus shown in FIG.

FIG. 7 is a continuation of the flowchart of FIG.

FIG. 8 is a front view of a device according to the prior art.

FIG. 9 is a perspective view of the fixed corner knife device in FIG.

FIG. 10 is a plan view of each of the fixed and movable corner knife devices shown in FIG.

FIG. 11 is a plan view showing a state of a body cloth and a ball cloth when a standard bead sewing (parallel sewing) is performed.

FIG. 12 is a plan view showing a state of a body cloth and a bead cloth when atypical bead sewing (oblique stitching) is performed.

[Explanation of symbols]

1a, 1b Fixed corner female 2a, 2b movable corner female 10 beds 11 2-needle sewing machine 12 Conveyor 15 center female 36 cylinders 37 cylinders 41b Control means N sewing needle MO motor 41a computing means 41 Central Processing Unit (CPU)

Claims (2)

[Claims] 1. A two-needle sewing machine mounted on a bed upper surface,
A conveying device for translating the sewn product to a predetermined position for performing the sewing operation, the center knife operation, and the corner knife operation while pressing the sewn product placed on the bed and the sewn product arranged on the axis of symmetry of the needle. A center knife that is supported by the machine frame so that it can be retracted from the top of the bed in relation to the feed so that it cuts the linear groove during movement, and it moves up and down individually or simultaneously at the end of the linear groove toward the outside of the linear groove. A pair of left and right fixed corner knives for forming an opening V-shaped groove and forming right-angled or oblique opening edges of various patterns with respect to the longitudinal direction of the linear groove when the V-shaped groove is pushed open. A V-shaped groove that is movable along the feed direction and moves up and down individually or simultaneously simultaneously to open toward the outside of the linear groove is formed, and a straight line is formed when the V-shaped groove is pushed open. Directly align various patterns with the longitudinal direction of the groove. Or a pair of left and right movable corner knife forming an oblique opening edge, and a computing means for computing the transport speed and the distance of the transport device from the sewing deviation amount of the sewing data of various patterns which are input in advance, And a control means for controlling the movement of the sewn product at a predetermined speed at a predetermined speed in synchronization with the push-up operation of any one of the corner knife based on the output of the computing means. A characteristic bead sewing device. 2. A two-needle sewing machine mounted on a bed upper surface,
A conveying device for moving the sewn product in parallel to a predetermined position for performing the sewing operation, the center knife operation, and the corner knife operation while pressing the sewn object placed on the bed, and the sewn object arranged on the axis of symmetry of the needle. A center knife that is supported by the machine frame so that it can be retracted from the top of the bed in relation to the feed so that it cuts the linear groove during movement, and it moves up and down individually and opens toward the outside of the linear groove at one end of the linear groove. When a V-shaped groove is formed and the V-shaped groove is pushed open, various patterns are formed in the longitudinal direction of the linear groove.
A pair of left and right fixed corner knives forming a right-angled or slanted opening edge of the straight groove, and movable vertically in the cloth feeding direction and individually moving up and down to the other end of the straight groove toward the outside of the straight groove. A pair of left and right movable corners that form a V-shaped groove that opens when opened and forms a right-angled or oblique opening edge of various patterns with respect to the longitudinal direction of the linear groove when the V-shaped groove is pushed open. Calculating means for calculating the knife push-up speed from the sewing deviation amount of the sewing data of various patterns inputted in advance, and the sewn product moves in synchronization with the operation of the carrying device based on the output of the calculating means. And a control means for controlling the operation of each of the corner knife at a predetermined push-up speed.