JPH0531274A - Binding sewing machine - Google Patents

Abstract

PURPOSE:To provide the binding sewing machine which can change easily notch length and an angle of a corner cut part at the time of binding, without executing a troublesome work. CONSTITUTION:A shaft 26 in which a knife 25 is fixed to the upper end passes through the upper and the lower supporting plates 30, 31 of a supporting member 27 and is supported so as to be movable vertically, and this shaft 26 is moved vertically by a knife driving step-motor 29 fixed integrally to the supporting member 27. In the knife 25, an inclined blade part 25a is formed and by an ascent amount of the shaft 26, notch length of each comer cut part is varied. A pair of supporting members 27 are supported so as to be turnable around a straight line passing through a back part of knife 25 by the upper plate part 23 and the lower plate part 24 of a base 21, respectively, and turned by a knife angle adjustment step-motor 28, respectively. By this motor 28, an opening angle of the corner cut part is adjusted arbitrarily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bead sewing machine capable of automatically forming straight hole portions and corner cut portions on a work cloth.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
In the state in which the beaded cloth 2 in which both side edge portions are folded back in a ring shape is applied, they are sewn together by two seams 3 extending in parallel, and the straight cloth hole portion 5 is attached to the work cloth 4. There is provided a bead sewing machine in which a notch made up of four corner cut portions 6 continuous with the above is automatically formed.

In this case, although not shown in detail, the straight hole portion 5 is formed by a center knife provided between two sewing needles when the stitch 3 is formed. After the sewing and the formation of the straight hole 5, the work cloth 4 is sent to a predetermined position, and four corner knives driven by an air cylinder are simultaneously projected from below, thereby cutting four corners. The part 6 is formed.

[0004]

By the way, when, for example, an edge trimming pocket extending diagonally is formed on the cloth 1, as shown in FIG. 11, two seams 3 are formed by vertically shifting in the drawing. However, in this case, the corner dimensions of the corner cut portions 6 must be different from each other, and the opening angles of the corner cut portions 6 with respect to the extending direction of the straight hole portion 5 must also be different. I won't.

Conventionally, such a corner cut portion 6 is formed.
In order to change the length dimension, a plurality of corner knives having different cut lengths are prepared and the user replaces them according to the type of sewing. Further, in order to change the opening angle of the corner cut portion 6, the user manually adjusts the mounting angle of the corner knife.

[0006] However, in such a conventional one, there is a problem that the user has to perform a troublesome work such as exchanging a corner knife and adjusting a mounting angle each time the sewing type is changed.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a bead sewing machine capable of easily changing a cutting length and an angle of a corner cut portion without troublesome work. There is

[0008]

In a bead sewing machine of the present invention, a beaded cloth is sewn to a cloth by two seams extending in parallel, and a space between the two seams is formed on the work cloth. And forming straight hole portions parallel to the stitches, and two corner cut portions extending substantially in a V shape from the ends of the straight hole portions and extending in an oblique direction. Are formed on both ends of the work cloth respectively, and are provided on the lower surface side of the support table that supports the work cloth so as to be vertically movable and horizontally rotatable in correspondence with the corner cut portions, and are provided in the ascending direction. A knife having a blade portion that is inclined with respect to the knife, and the knife portion that is raised to project on the upper surface of the support base, and a knife that changes the horizontal direction of the blade portion of each knife to an arbitrary angle. The angle adjusting means and each of the above-mentioned scalpels are respectively raised by an arbitrary raising amount. Characterized in structure in which a scan driving unit.

[0009]

According to the above means, when the knife is lifted by the knife driving means, the work cloth supported by the support is cut by the blade of the knife to form a corner cut portion. At this time, the amount of protrusion of the blade from the support base changes depending on the amount of rise of the knife, but since the blade is inclined with respect to the ascending direction of the knife, the amount of protrusion of the blade causes the work cloth to move. The length dimension of the corner cut portion formed at is changed.

Therefore, by raising each knife by the knife driving means at an arbitrary rising amount, it is possible to form a corner cut portion of an arbitrary length dimension on the work cloth without exchanging the knife. It will be possible.

Further, since the corner cut portion is formed with an opening angle corresponding to the horizontal direction of the knife blade, the knife angle adjusting means can set the horizontal direction of the knife blade to any desired direction. By changing the angle, it becomes possible to form a corner cut portion having an arbitrary opening angle without performing manual adjustment.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Since the work cloth 4 shown in FIGS. 10 and 11 described in the conventional example is also common to this embodiment, detailed description and new illustration are omitted, and common reference numerals are used.

First, with reference to FIG. 5, a schematic structure of a bead sewing machine according to this embodiment will be briefly described. A work table 11 as a support is provided on the main body of the sewing machine, and a sewing machine arm 13 having two needle bars 12 (only one is shown) is provided on the work table 11 at a lower portion of the tip with a predetermined distance. Has been.

The two needle bars 12 are used for the sewing machine motor 1.
4 (only shown in FIG. 6) is driven up and down by a drive mechanism, and cooperates with a thread catcher (not shown) provided on the lower surface side of the work table 11 to sew the work cloth 4. It is adapted to form the eye 3. Although not shown,
A center knife mechanism for forming a linear hole 5 in the work cloth 4 is disposed between the two needle bars 12.

A clamp device 15 for holding the cloth 1 (work cloth 4) on the upper surface of the work table 11 is provided on the work table 11. The clamp device 15 is configured to hold the cloth 1 shown in FIGS. 10 and 11 on both left and right sides thereof with a space for forming the stitches 3, and at a set position shown by a chain double-dashed line in FIG. And a corner cut forming position shown by a solid line.

The clamp device 15 is moved laterally in the figure by a cloth drive mechanism 17 provided on the lower surface side of the work table 11 and having a drive motor 16 as a drive source. Also, on the work table 11,
A binder 18 is provided at the right side of the sewing machine arm 13. The binder 18 is for holding the beaded cloth 2 arranged on the upper surface of the cloth 1 held by the clamp device 15 in a state where both side edge portions are folded back in a ring shape.

As a result, the needle bar 12 is driven by the drive mechanism while the clamp device 15 holding the cloth 1 and the beaded cloth 2 moves from the set position in the direction of arrow A in FIG. The fabric 1 is sewn with a beaded cloth 2 by two seams 3 extending in parallel. At the same time, a straight hole 5 is formed by a center knife mechanism on a work cloth 4 formed by sewing the beaded cloth 2 on the cloth 1.

On the lower surface side of the work table 11, two sets of corner knife devices 19 are provided corresponding to the corner cut forming positions of the clamp device 15. As will be described later in detail, each of the corner knife devices 19 has two sets of knife mechanisms 20 (see FIG. 2), and the knife mechanisms 20 allow the straight hole portions to be formed in the work cloth 4. A total of four corner cut portions 6 are formed so as to spread laterally from the end portion 5 in the left-right direction and extend in a substantially V shape.

Here, in the bead sewing machine according to this embodiment, as shown in FIG. 10, two beads 3 are sewn to a cloth 1 with a bead cloth 2 extending in parallel, Work cloth 4
On the other hand, the sewing work for forming the notches made up of the straight hole portion 5 and the four corner cut portions 6 is automatically performed. However, when the fabric 1 is formed with an edging pocket extending in an oblique direction, for example. As shown in FIG. 11, two stitches 3 are formed by vertically shifting in the figure, and along with this, the length dimension of each corner cut portion 6 and the linear hole portion 5 are formed.
It is necessary to change the angle with respect to.

Therefore, the corner knife device 19 of this embodiment is used.
As described below, the cut length dimension of the corner cut portion 6 and the angle with respect to the linear hole portion 5 can be arbitrarily changed. Hereinafter, the corner knife device 19 will be described in detail with reference to FIGS. 1 to 4. Although FIGS. 1 to 4 show one (right side in FIG. 5) corner knife device 19, the other corner knife device 19 has the same configuration.

The corner knife device 19 has a base 21.
It is configured by incorporating two sets of knife mechanisms 20 into the. The base 21 is configured to integrally have a semi-circular plate-shaped upper plate portion 23 and a lower plate portion 24 so as to extend in the horizontal direction from the upper and lower end portions of a rectangular plate-shaped back plate 22. As shown in FIGS. 3 and 4, each of the upper plate portion 23 and the lower plate portion 24 has two elongated holes 23 symmetrically with respect to the center line k.
a, 23a and 24a, 24a are formed. Further, guide grooves 23b and 24b, which are located on the outer peripheral portion and extend in an arc shape around the center point o, are formed over substantially the whole of the lower surface portion of the upper plate portion 23 and the upper surface portion of the lower plate portion 24, respectively. ..

Two sets of knife mechanisms 20 are provided on the base 21 symmetrically with respect to the center line k. The knife mechanism 20 includes a knife 25, a shaft 26 to which the knife 25 is attached, Support member 2 for supporting the shaft 26
It is composed of 7, 2 stepping motors 28, 29 and the like.

Of these, the support member 27 is composed of two substantially fan-shaped support plates 30 and 31, and a connecting portion 32 connecting the support plates 30 and 31 at the inner peripheral portion.
The support plate 30 is located on the lower surface of the upper plate portion 23 of the base 21, and a protrusion (not shown) is slidably engaged with the guide groove 23b, and the support plate 31 is the lower plate portion. 24
The protrusion not shown in the drawing is located on the upper surface of the guide groove 24b.
Slidably engaged with. With this, the support member 27
Is provided between the upper plate portion 23 and the lower plate portion 24 of the base 21 so as to be movable in the directions of arrows B and C along the guide grooves 23b and 24b around the center point o. Further, as shown in FIGS. 3 and 4, the support plates 30 and 31 are provided with rectangular insertion holes 30a and 31a. The insertion holes 30a and 31a are arranged so as to overlap the elongated holes 23a and 24a.

A gear portion 31b is formed on the outer peripheral edge of the lower support plate 31. On the other hand, a knife angle adjusting motor 28 is attached to the lower surface of the lower plate portion 24, and a gear 28a attached to the rotating shaft of the motor 28 meshes with the gear portion 31b. The knife angle adjusting motor 28 is controlled by a control device which will be described later, and when the knife angle adjusting motor 28 is driven by this, the supporting member 27 is moved toward the base 21 by an arrow. It is adapted to be displaced in the B and C directions.

On the other hand, the shaft 26 is in the form of a rectangular rod that is long in the vertical direction, and has a rack 26a formed on one side thereof, as shown in FIG. The shaft 26 has the insertion hole 3
The support member 27 is supported by the support member 27 so as to be vertically movable by being inserted through 0a and 31a. Both upper and lower ends of the shaft 26 also penetrate the long holes 23a and 24a and project above and below the base 21. In this case, as the support member 27 is moved in the directions of the arrows B and C, the shaft 26 also has the elongated holes 23a,
It is adapted to be moved integrally with the support member 27 within the range of 24a.

The support member 27 has a support plate 3
The motor mounting member 33 so that it is hung between 0 and 31
Is provided, and the knife driving step motor 29 is mounted on the motor mounting member 33. A pinion gear 29a is attached to the rotary shaft of the knife driving step motor 29, and the pinion gear 29a meshes with the rack 26a of the shaft 26. This knife drive motor 29
Is also controlled by a control device which will be described later, whereby the shaft 26 moves up and down with respect to the support member 27 (base 21) by rotating the knife driving motor 29. It is like this.

A female mounting member 34 is attached to the upper end of the shaft 26.
The knife 25 is attached to the knife attachment member 34 by, for example, screwing. As shown in Figure 1,
The knife 25 has a single-edged shape with a sharp edge, the left ridge portion in the figure extends in the vertical direction, and the right blade portion 25a has an inclined shape that widens downward. This scalpel 25 is shown in FIG.
As shown in FIG. 5, the blade tip (ridge) corresponds to the center point o when viewed from the upper surface, and the blade section 25a is attached so as to extend in the radial direction from the center point o.

The corner scalpel device 1 thus configured
As shown in FIG. 5, one of the reference numerals 9 is attached to a support frame 35 fixed to the lower surface of the work table 11, and the other is a support frame 3 that is movable in the left-right direction on the lower surface of the work table 11.
It is attached to 6. At this time, the corner knife device 1
9 is attached so that the center line k is oriented in the left-right direction in the figure, that is, in the direction in which the straight hole portion 5 formed in the work cloth 4 extends. Further, the support frame 36 on the left side in the figure is adapted to be moved in the left-right direction according to the cut length of the linear hole portion 5 by the center knife mechanism, whereby the two sets of corner knife devices 19 are linearly moved. It is positioned in a state where there is a predetermined interval according to the holes 5.

With this, when the support member 27 is rotationally displaced, the knife 25 is also rotated about the center point o accordingly, so that the knife 25 is rotated by the rotational position of the knife angle adjusting motor 28. In other words, the opening angle with respect to the center line k is determined. Then, the knife 25 is raised and lowered by the knife driving motor 29, and by ascending, protrudes upward from the opening formed in the work table 11, and thus, is clamped by the clamp device 15 at the corner cut forming position. With respect to the held work cloth 4, the work cloth 4 is cut by the blade portion 25a.
Is cut to form a corner cut portion 6. In this case, the ascending amount of the knife 25 is changed by the number of rotations (number of energizing pulses) of the knife driving motor 29.

On the other hand, an operation panel 37 as shown in FIG. 7 is provided on the front surface of the main body of the sewing machine. The operation panel 37 has a start key 38 for starting a sewing operation, a program key 39 for setting a mode of the sewing operation desired by the user, a reference setting lever switch 40, a ten key 41, and a plurality of keys. The display unit 42 of FIG. Further, on the operation panel 37, a guide graphic 43 as shown in FIG. 8 is written.

With this operation panel 37, the user sets the reference stitch row and, as shown in the guide pattern 43, the sewing length L, the sewing start side deviation ΔS, and the sewing end side deviation ΔE. In addition, the opening angles a, b, c, d with respect to the extending direction of the straight hole portion 5 and the cut lengths thereof can be input for each of the four corner cut portions 6. Is becoming

Each mechanism of the bead sewing machine constructed as described above is controlled by the control device 44 shown in FIG. This control device 44 includes a CPU 45, R
The microcomputer mainly comprises an OM 46, a RAM 47, etc., and signals from the start key 38, program key 39, reference setting lever switch 40, ten keys 41, etc. of the operation panel 37 are inputted.

The control device 44 receives the input, and stores the program stored in the ROM 46 and the RAM 47.
The sewing machine motor 14 is controlled via the driver 48 based on the data stored in
The drive motor 16 via the driver 50 (only one is shown), and the knife angle adjusting motor 28 is pulse-controlled through the driver 51 (only one shown). The motor 29 is pulse-controlled.

At this time, the control device 44 causes the reference stitch row, the sewing length L, the sewing start side deviation ΔS, and the sewing end side deviation ΔE.
The sewing start position and the sewing end position of the two rows of stitches 3 are calculated based on the input of, and the stitches 3 corresponding to the input are automatically formed on the work cloth 4. .. Then, the rotational position of each knife angle adjusting motor 28 is determined based on the opening angles a, b, c, d of each corner cut portion 6, and the knife driving motor is driven based on the input of each cut length. The number of energizing pulses to the motor 29 is determined by, for example, calculation.

Therefore, the control device 44, each knife angle adjusting motor 28 and the like constitute the knife angle adjusting means of the present invention, and the control device 44 and each knife driving motor 29 etc. form the knife driving means of the present invention. It is composed.

In this case, the corner cut portion 6 is the knife 2
Since it is formed at an angle according to the horizontal direction of the blade portion 25a of No. 5, by determining the rotation position of each knife angle adjusting motor 28, the work cloth is opened at an opening angle corresponding to the rotation position. Each corner cut portion 6 is formed on the surface 4.

The rising amount of the knife 25 is determined by the number of energizing pulses to the knife driving motor 29. Here, since the blade portion 25a is inclined with respect to the rising direction of the knife 25, its blade The corner cut portion 6 formed on the work cloth 4 by the amount of protrusion of the portion 25a from the work table 11.
The length dimension changes. Therefore, each knife driving motor 2
By determining the number of energizing pulses to 9 respectively, each corner cut portion 6 is formed in the work cloth 4 with a cutting length according to the amount of rise of each knife 25.

The four corner cut portions 6 are formed at the same time, but at this time, the rising timings of the four knifes 25 are all the same. With this,
In each corner cutting portion 6, the timing of starting cutting and the blade pressure are made equal.

Next, the operation of the above configuration will be described with reference to FIG. When the power of the bead sewing machine is turned on,
The sewing work is executed according to the flowchart of FIG.
Here, when starting the sewing work, first, the operator inputs and sets a desired sewing length L and the like using the operation panel 37.

At this time, if it is desired to perform the same sewing work as in the previous mode, it is not necessary to newly set the previous setting. Therefore, the start key 38 is turned on (Yes in step S1). ), The sewing work is started.
On the other hand, when it is desired to input, the program key 39 is first turned on (Yes in step S2).

To input data, first, the lever switch 4
The right reference or the left reference is selected by 0 (step S
3). After this selection, the sewing length L of the stitch row on the reference side is input with the ten keys 41 (step S4 or S6),
Further, the deviation ΔS at the sewing start side and the deviation ΔE at the sewing end side are sequentially input (step S5 or S7). Here, for example, in the case of the right reference (Yes in step S3), the sewing length L of the right stitch row is input in step S4, and in step S5, the deviation ΔS on the sewing start side, that is, the left side How much the sewing start point of the stitch row deviates from the right stitch row, and how much the sewing end side deviation ΔE, that is, how much the sewing end point of the left stitch row deviates from the right stitch row Will be input. In the case of left reference, the opposite is true.
As shown in FIG. 10, when the left and right stitches 3 perform the same sewing work, ΔS and ΔE are 0.

Next, at step S8, the opening angles a, b, and
Input c, d and cut length. This input is performed for each of the four corner cut portions 6 on the left and right sides on the sewing start side and the left and right sides on the sewing end side. This completes the input of the mode of sewing work. As a result of this input, the control device 44 determines the sewing start position and the sewing end position of the two rows of stitches 3 as described above, and the rotational position and knife of the knife angle adjusting motor 28 in each knife mechanism 20. The number of energizing pulses to the drive motor 29 is determined and stored in the RAM 47.

When starting the sewing work,
The operator sets the dough 1 on the clamp device 15 at the setting position, and further, the beaded cloth 2 on the dough 1.
Is placed and the binder 18 is operated. As a result, with the beaded cloth 2 having both side edges folded back in a ring shape, the cloth 1
Together with this, it is held by the clamp device 15. Here, when the start key 38 is turned on (step S1
Yes), the sewing work is started.

When the sewing operation is started, first, at step S9, a predetermined number of pulses are energized so that each knife angle adjusting motor 28 is located at the determined rotational position. As a result, the knife 25 of each knife mechanism 20 has an angle a, which is input and set with respect to the center line k when viewed from above.
It is opened at the angles of b, c, and d.

At the next step S10, the forming operation of the stitch 3 and the forming operation of the linear hole portion 5 are executed. In this operation, the left and right needle bars 12 are driven in accordance with the sewing length L and the sewing start side deviation ΔS and the sewing end side deviation ΔE while moving the clamp device 15 in the direction of arrow A at a predetermined speed. , By driving the center knife mechanism in accordance with them. As a result, the seam 3 and the linear hole 5 are formed on the work cloth 4.

When this operation is completed, in step S11, the clamp device 15 is stopped at the corner cut forming position while holding the work cloth 4, and in step S12, the corner cut for the work cloth 4 is continued. The forming operation of the portion 6 is executed. This operation is performed by simultaneously driving the four knives 25 by the knives driving motor 29 as described above. At this time, the number of energizing pulses to each knives driving motor 29 is It is assumed to correspond to the entered cut length.

As a result, each knife 25 is lifted by a predetermined amount, and each blade 25a is projected on the work table 11 by a predetermined amount, so that the work cloth 4 has the blade 25a.
The corner cut portion 6 is formed by cutting the length dimension corresponding to the protruding height of the. At this time, each female 25
Since the horizontal directional direction of the blade portion 25a is open at the angles a, b, c, d with respect to the center line k, the corner cut portion 6 is formed at those opening angles. Become. After each knife 25 descends to the original position, step S
At 13, the holding of the work cloth 4 by the clamp device 15 is released, and the clamp device 15 returns to the set position and is moved.

As described above, according to the present embodiment, the knife 25 having the blade portion 25a inclined with respect to the ascending direction is raised by the knife driving motor 29 at an arbitrary raising amount. By setting the rising amount, it is possible to form a cut in the work cloth 4 with an arbitrary length. Therefore,
It is possible to form a corner cut portion 6 of one kind of knife 25 having an arbitrary length dimension on the work cloth 4 without the need to replace the knife as in the conventional one.

Since the knife angle adjusting motor 28 changes the horizontal direction of the blade portion 25a of the knife 25 to an arbitrary angle, the corner cut portion 6 having an arbitrary angle is formed on the work cloth 4. can do. Therefore, unlike the conventional one in which the user adjusts the angle of the knife by manual adjustment, the corner cut portion 6 of an arbitrary angle can be processed without troublesome adjustment work.
It can be formed into.

In the above embodiment, the user inputs the angles and the cut lengths of all the corner cut portions 6. However, for example, the microcomputer automatically calculates the sewing length L and the deviations ΔS and ΔE. The present invention can be implemented by appropriately changing it within a range not departing from the gist, such as a configuration in which an angle and a cut length are set.

[0051]

As is apparent from the above description, according to the bead sewing machine of the present invention, the vertical movement and the horizontal direction are made on the lower surface side of the support base for supporting the work cloth in correspondence with each corner cut portion. A knife that is rotatably provided and has a blade portion that is inclined with respect to the ascending direction and that is raised so that the blade portion projects onto the upper surface of the support base, and the orientation of the blade portions of each of these knife in the horizontal direction. Since the knife angle adjusting means for changing the direction to an arbitrary angle and the knife driving means for elevating each knife by an arbitrary ascending amount are provided, the cutting length and the angle of the corner cut portion are troublesome. It has an excellent effect that it can be easily changed without work.

[Brief description of drawings]

FIG. 1 is a side view of a corner knife device according to an embodiment of the present invention.

[Figure 2] Front view of the corner knife device

FIG. 3 is a top view of the corner knife device.

4 is a cross-sectional top view of the corner knife device taken along line IV-IV in FIG.

FIG. 5 is a schematic side view of a bead sewing machine.

FIG. 6 is a block diagram showing an electrical configuration.

FIG. 7 is a front view of the operation panel.

FIG. 8 is an enlarged front view of part of the operation panel.

FIG. 9 is a flowchart showing a procedure of sewing work.

FIG. 10 is a plan view of the work cloth showing a state where the sewing work is finished.

FIG. 11 is a plan view of the work cloth showing a state in which sewing different from that in FIG. 10 is applied.

[Explanation of symbols]

In the drawings, 1 is cloth, 2 is ball cloth, 3 is seam, 4 is work cloth, 5 is straight hole portion, 6 is corner cut portion, 11 is work table (support base), 12 is needle bar, 15 Is a clamp device, 18 is a binder, 19 is a corner knife device, 20 is a knife mechanism, 21 is a base, 25 is a knife, 26 is a shaft, 27
Is a supporting member, 28 is a knife angle adjusting motor, 29 is a knife driving motor, 37 is an operation panel, and 44 is a controller.

Front page continuation (72) Inventor Kazushi Inoue 15-1 Naeshiro-cho, Mizuho-ku, Nagoya City Brother Industries, Ltd.

Claims (1)

Claim: What is claimed is: 1. A fabric is sewn with a beaded cloth by two seams extending in parallel, and the seam is located between the two seams with respect to the work cloth. A straight hole parallel to the straight hole is formed, and two corner cut portions that extend in an oblique direction from the end of the straight hole and extend in a substantially V shape are formed at both ends of the straight hole. In the bead sewing machine, the blade portion is provided on the lower surface side of the support table that supports the work cloth so as to be vertically movable and horizontally rotatable corresponding to each of the corner cut portions, and is inclined with respect to the ascending direction. And a knife in which the blade portion is protruded to the upper surface of the support base by being raised, and a knife angle adjusting means for changing the horizontal direction of the blade portion of each knife to an arbitrary angle, respectively, A knife driving hand that raises each knife by an arbitrary amount Welting sewing machine characterized by including and.