CN106245237B - Panel strip sewing machine - Google Patents

Panel strip sewing machine Download PDF

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Publication number
CN106245237B
CN106245237B CN201610390961.7A CN201610390961A CN106245237B CN 106245237 B CN106245237 B CN 106245237B CN 201610390961 A CN201610390961 A CN 201610390961A CN 106245237 B CN106245237 B CN 106245237B
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CN
China
Prior art keywords
sewing
cloth
lining cloth
presser foot
interlining
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Active
Application number
CN201610390961.7A
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Chinese (zh)
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CN106245237A (en
Inventor
相泽明幸
八木泽良纪
森岛伸行
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Juki Corp
Original Assignee
Juki Corp
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Publication date
Priority to JP2015-113548 priority Critical
Priority to JP2015113548A priority patent/JP6530243B2/en
Application filed by Juki Corp filed Critical Juki Corp
Publication of CN106245237A publication Critical patent/CN106245237A/en
Application granted granted Critical
Publication of CN106245237B publication Critical patent/CN106245237B/en
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Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B3/00Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/10Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for making piped openings
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B29/00Pressers; Presser feet
    • D05B29/02Presser-control devices
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B35/00Work-feeding or -handling elements not otherwise provided for
    • D05B35/06Work-feeding or -handling elements not otherwise provided for for attaching bands, ribbons, strips, or tapes or for binding

Abstract

The invention does not need extra cutting operation of lining cloth when sewing at the rear reference position. The control device (60) is provided, which corresponds to the cloth to be arranged at the front reference position (F) or the rear reference position (R) set on the upper surface of the workbench (11), and sews the conveyed cloth from the sewing starting position to the sewing ending position, the lining cloth supply device (40) is provided with actuators (462, 463), the actuators (462, 463) switch the state that the lining cloth (S) can be supplied and the state that the lining cloth (S) can not be supplied along with the conveying of the large presser foot (21), and the control device controls the state switching of the actuators under the condition that the cloth is arranged at the rear reference position, so that the lining cloth is aligned with the sewing starting position relative to the cloth conveyed by the large presser foot.

Description

Panel strip sewing machine
Technical Field
The present invention relates to a sewing machine for performing panel strip sewing.
Background
In the case of performing a panel sewing operation accompanied by the sewing of the interlining fabric S by the conventional panel sewing machine, as shown in fig. 9, the operator places the cloth in a position (sewing start position) where the operator desires to start the sewing operation of the cloth (main cloth and panel cloth (both not shown)) or a position (sewing end position) where the operator desires to end the sewing operation in accordance with each reference position predetermined on the table of the sewing machine.
The welt sewing machine has a large presser foot which presses a cloth from above on an upper surface of a horizontal table and conveys the cloth to a sewing position where a sewing needle is present. When the sewing start position is positioned, the positioning is performed at the front reference position F close to the sewing position, and when the positioning is performed at the sewing end position, the positioning is performed at the rear reference position R far from the sewing position. The front reference position F and the rear reference position R are indicated to the operator by, for example, indicating marks from an indicator lamp from above.
In addition, in the case of sewing a band-shaped interlining fabric S on the back side of a cloth in a fillet sewing, a conventional fillet sewing machine forms an opening at a front reference position of the upper surface of a work table, waits for a front end of the band-shaped interlining fabric S to continue from the opening by a certain amount, catches the front end of the interlining fabric S with a large presser foot moving forward to a sewing position, and conveys the interlining fabric S to the sewing position together with the cloth to perform sewing (for example, see patent document 1).
Patent document 1: japanese patent laid-open publication No. 2007-195806
Further, the front reference position F and the rear reference position R of the welt sewing machine are set at positions separated to some extent in the conveying direction so as to be able to cope with sewing of long welt cloth. Therefore, if the normal length of the molding cloth is aligned with the front reference position F and the rear reference position R, respectively, the cloth is placed at a position far behind (apart from the sewing position) the front reference position F when the rear reference position R is aligned. That is, if Fc is a distance from the front reference position F to the sewing position N, Rc is a distance from the rear reference position R to the sewing position N, and c is a sewing length to be applied to the cloth, in the case of the front reference position F, if Fc is conveyed from the set position, sewing is started, and in the case of the rear reference position R, if Fc is conveyed from the set position (Rc-c), sewing is started.
The opening for supplying the interlining fabric S is provided at the front reference position F so that the interlining fabric can be supplied at both the front reference position F and the rear reference position R, and waits while the front end portion is pulled out by the sewing start side length a from the opening so that the large presser foot holding the cloth placed at the front reference position F can catch the interlining fabric.
In the above-described situation, if the supply of the interlining cloth S is performed during the sewing at the rear reference position R, the large presser foot holding the cloth holds the interlining cloth S drawn out from the opening located at the front reference position F and starts the conveyance, and therefore the interlining cloth S starts to be drawn out from a position very far ahead of the fillet cloth. Therefore, the interlining S is sewn to be longer than necessary (hatched portion in fig. 9), and thus, it is necessary to perform cutting of the extra interlining S by manual work after completion of sewing.
Further, although the above-described problem can be alleviated by setting the rear reference position R to the more front side, the sewing length c can be performed only within the range of (Rc-Fc), and therefore the range of the length of the molding cloth that can be sewn becomes narrow, so it is actually difficult to set the rear reference position R to the more front side.
Disclosure of Invention
The invention aims to provide a sewing machine which can eliminate the need of extra cutting operation of lining cloth when sewing at a rear reference position.
(1)
A welt sewing machine is characterized by comprising:
a large presser foot feeding mechanism which is provided with a large presser foot, presses the cloth loaded on the workbench from the upper part and conveys the cloth to the sewing position;
a sewing machine motor for sewing the cloth;
a lining cloth supply device which holds a roller wound with lining cloth below the worktable and supplies the lining cloth from an opening part on the upper surface of the worktable; and
a control device for sewing the conveyed cloth from the sewing start position to the sewing end position corresponding to the cloth being arranged at one of a front reference position set on the upper surface of the table for aligning the sewing start position of the cloth or a rear reference position for aligning the sewing end position of the cloth,
the lining cloth supply device is provided with an actuator which switches the state that the lining cloth can be supplied and the state that the lining cloth can not be supplied along with the conveying of the big presser foot,
the control device controls the state switching of the actuator so that the sewing starting position of the lining cloth is aligned with respect to the cloth conveyed by the large presser foot when the cloth is arranged at the rear reference position.
(2)
The welt sewing machine according to the above (1), characterized in that,
the actuator of the lining cloth supply device switches between a state of preventing the large presser foot from being supplied and a state of releasing the prevention for the lining cloth in a state of being capable of being supplied along with the conveyance of the large presser foot.
(3)
The welt sewing machine according to the above (1), characterized in that,
the actuator of the lining cloth supply device draws out the lining cloth to a position where the lining cloth can be supplied along with the conveying of the big presser foot.
(4)
The welt sewing machine according to any one of (1) to (3), wherein,
the control device controls the large presser foot feeding mechanism so that the conveying speed generated by the large presser foot feeding mechanism is reduced or stopped when the large presser foot is used for holding and conveying the lining cloth.
(5)
The welt sewing machine according to any one of (1) to (4), wherein,
a length setting unit for setting the length of the supplied lining cloth,
the lining cloth supply device is provided with a cutting part which cuts the supplied lining cloth,
the control device controls the cutting part to cut the lining cloth if the lining cloth is pulled out by the set length by the large presser foot.
(6)
The welt sewing machine according to the above (5), wherein,
the control device controls the large presser foot feeding mechanism to enable the first conveying speed of the clothes before sewing is started to be higher than the second conveying speed of the clothes after sewing is started,
the control device is used for controlling the operation of the motor,
determining whether or not the cutting of the interlining by the cutting section is performed before the start of the sewing, based on the length of the interlining set by the length setting section,
when the cutting of the lining cloth is performed before the sewing is started, the large presser foot feeding mechanism is controlled so that the conveying speed when the lining cloth is cut becomes lower than the first conveying speed.
ADVANTAGEOUS EFFECTS OF INVENTION
In the present invention, the control device controls the actuator of the lining cloth supply device to perform the positioning of the sewing start position of the lining cloth with respect to the cloth conveyed by the large presser foot corresponding to which of the front reference position and the rear reference position the cloth is arranged, so that the lining cloth can be supplied at an appropriate position with respect to the cloth in the case of sewing at any one of the front reference position and the rear reference position, and the supply of extra lining cloth can be suppressed even in the case of sewing at the rear reference position. Further, this eliminates the need for cutting off extra interlining after sewing.
Drawings
Fig. 1 is a perspective view of a welt sewing machine according to the present embodiment.
Fig. 2 is a side view of the welt-sewing machine of fig. 1.
Fig. 3 is a block diagram showing a control system of the welt-sewing machine of fig. 1.
Fig. 4 is an oblique view of the lining cloth feeding device.
Fig. 5 is a front view of the interlining cloth feeding apparatus.
Fig. 6 is a sectional view taken along line V-V of fig. 4.
Fig. 7 is a sectional view of the lining cloth supply device in a state where the lining cloth can be supplied.
Fig. 8 is a sectional view of the lining cloth supply device in a state where the supply of the lining cloth is disabled.
Fig. 9 is an explanatory diagram showing a positional relationship of the interlining at the front reference position and the rear reference position.
Fig. 10 is a timing chart of sewing operation including the lining cloth supply control.
Fig. 11 is a flowchart of a sewing operation including a lining cloth supply control.
Fig. 12 is a timing chart of the sewing operation showing the relationship between the parameter adjustment of the length of the interlining and the operation timing.
Fig. 13 is a timing chart of sewing operation including other lining cloth supply control.
Fig. 14 is a timing chart of sewing operation including other lining cloth supply control.
Fig. 15 is a flowchart of a sewing operation including the interlining supply control of fig. 14.
Fig. 16 is a timing chart of sewing operation including other lining cloth supply control.
Description of the reference numerals
10 filleting sewing machine
11 working table
12 crimping presser foot
13 stitch needle
14 movable cutter
15 needle plate
16 sewing machine motor
20 big presser foot feed mechanism
21 big presser foot
25-foot electric motor
40 lining cloth feeding device
41 lining cloth holding part
42 guide part
44 drive part
46 state switching part
48 cutting part
60 control device
61 CPU
62 memory
64 display panel
65 setting switch (Length setting part)
68 operating pedal
90-angle cutter mechanism
111 opening part
251 coder
441 support block
442 positive feed roller
443 driven feed roller
444 withdrawing motor
462 unclamping cylinder (actuator)
463 locking cylinder (actuator)
481 Movable cutter
482 fixed cutter
Cylinder for 483 cutter
C main cloth (clothing material)
Reference position before F
N sewing positions
Rear reference position of R
S-shaped lining cloth
Sr roller
Detailed Description
[ integral Structure of Filler rod Sewing machine ]
Next, a description will be given of a welt sewing machine 10 as an embodiment of the present invention, based on fig. 1 to 11. Fig. 1 is a perspective view showing an overall schematic configuration of a welt sewing machine 10, fig. 2 is a front view of the welt sewing machine 10, and fig. 3 is a block diagram showing a control system of the welt sewing machine 10. In the present embodiment, the directions of the respective parts of the sewing machine 10 are determined based on XYZ axes shown in the respective drawings. In a state where the sewing machine 10 is installed on a horizontal plane, the Z-axis direction indicates a direction which becomes a vertical direction, the X-axis direction indicates a direction which is horizontal and coincides with a cloth feeding direction, and the Y-axis direction indicates a direction which is horizontal and orthogonal to the X-axis direction.
Further, a direction in which a large presser foot feed mechanism 20 (described later) is positioned in the X-axis direction and conveys a cloth at the time of sewing (downstream side in the conveying direction) is set as a front side, and an upstream side in the conveying direction is set as a rear side.
The welt sewing machine 10 includes: a table 11 as a table, which is a sewing table for sewing the main fabric C as a cloth with the molding fabric and the interlining fabric S; a mark irradiation device 30 which irradiates a point mark indicating a front reference position and a rear reference position of the table 11, which are the sewing references of the main fabric C placed thereon, onto the table 11; a large presser foot feed mechanism 20 as a cloth feed mechanism that holds the main cloth C and feeds the main cloth C; a hemming presser foot mechanism for lifting and lowering a hemming presser foot 12, the hemming presser foot 12 being used for folding back both width direction end parts of a long molding cloth (not shown) sewed with the main cloth C; a needle up-and-down moving mechanism for dropping the main cloth C fed in the X-axis direction by the large presser foot feeding mechanism 20 through the two needles 13; a cutter mechanism for lifting the movable cutter 14 at the front side of the two sewing needles 13 to form a linear cutting seam on the main cloth C and the fillet cloth; a pot mechanism for catching the stitches from the stitches 13 and winding the stitches around the lower thread; a sewing machine frame 80 which is arranged on the workbench 11 and is used for containing and keeping the sewing needle up-down moving mechanism and the cutter mechanism; a corner cutter mechanism 90 for forming a substantially V-shaped slit at a position where both ends of the linear slit are formed; an interlining cloth feeding device 40 that holds a roll Sr around which interlining cloth S is wound below the table 11 and draws out a leading end of the interlining cloth S from an opening 111 in the upper surface of the table 11; and a control device 60 that controls the operations of the above-described respective configurations.
The panel sewing machine 10 corresponds to a so-called automatic panel sewing machine which performs a series of sewing operations according to various parameters required for panel sewing set in advance without requiring any other input operation if sewing is started.
The following describes each part in detail.
[ working table and Sewing machine frame ]
The upper surface of the table 11 is parallel to the X-Y plane and is used in a horizontal state. A needle plate 15 is attached to a needle drop position 15a of the table 11, which is formed by the sewing needle 13. The needle plate 15 has: a needle hole into which two sewing needles 13 are inserted; and a slit into which the movable knife 14 of the knife mechanism is inserted.
In addition, a concave portion is formed in the table 11 to house the base portion 81 of the sewing machine frame 80. Further, on the table 11, a large presser foot feed mechanism 20 and a corner cutter mechanism 90 are arranged on the downstream side in the cloth feed direction of the sewing machine frame 80, and a hemming presser foot mechanism (not shown except for the hemming presser foot 12) is arranged on the upstream side in the cloth feed direction.
In addition, during the sewing operation of the welt sewing machine 10, the worker stands up on the rear end side of the table 11 to perform the operation of placing the main fabric C.
The sewing machine frame 80 is mainly composed of the following components: a base portion 81 provided on the table 11; a longitudinal body portion 82 provided upright from the base portion 81; and an arm portion 83 extending horizontally from an upper portion of the longitudinal body portion 82.
The sewing machine motor 16 is disposed at the lower part of the sewing machine frame 80, the lower shaft for transmitting the rotational driving force of the stitch mechanism from the sewing machine motor 16 is supported in the Y-axis direction inside the base part 81, and the upper shaft for transmitting the vertical movement driving force of the needle vertical movement mechanism from the sewing machine motor 16 is supported in the Y-axis direction inside the arm part 83.
The upper shaft and the lower shaft are fixedly provided with pulleys, respectively, and are linked by a timing belt passing through a longitudinal body portion 82 of the sewing machine frame 80.
[ Up-and-down moving mechanism of sewing needle ]
The needle vertical moving mechanism is composed of a known structure and comprises: two sewing needles 13, which form two needles; two needle bars which hold the respective needles 13 at the lower end thereof; upper and lower metal bearings slidably supporting the needle bars along the longitudinal direction thereof; a needle bar holding portion for holding two needle bars at the same time; a sewing machine motor 16 which is a vertical movement driving source of the needle bar; an upper shaft rotationally driven by the sewing machine motor 16; a rotary hammer fixedly connected to one end of the upper shaft and performing rotary motion; and a crank lever, one end of which is connected to a position eccentric from the rotation center of the rotary hammer, and the other end of which is connected to the needle bar holding portion.
When the upper shaft is rotated, the rotary hammer is similarly rotated, one end of the crank rod circularly moves around the upper shaft, and at the other end, only the moving component in the Z-axis direction of the circular movement at the one end is transmitted to the needle bar holding portion, so that each needle bar reciprocates.
Then, a straight-line stitch is formed in the X-axis direction for the main fabric C and the molding fabric conveyed in the X-axis direction.
[ cutter mechanism ]
The cutter mechanism is provided with: a movable knife 14 forming a linear slit; a cutter bar having a movable cutter 14 at a lower end portion thereof and supported in the arm portion 83 so as to be movable up and down; a cutter motor 17 serving as a driving source for moving the cutter bar up and down; and a transmission mechanism for converting and transmitting the rotational driving force from the cutter motor 17 into a reciprocating driving force in the vertical direction.
That is, the cutter motor 17 is rotationally driven together with the feeding operation of the main fabric C, and the movable cutter 14 is moved up and down by the transmission mechanism, so that the cutting corresponding to the cutter width is repeatedly formed to form the linear cutting.
The cutting edge of the movable cutter 14 is formed in the X-axis direction, and a slit is formed in the X-axis direction for the main fabric C and the molding fabric conveyed in the X-axis direction.
[ kettle mechanism ]
The kettle mechanism is disposed in a base portion 81 of the sewing machine frame 80. This kettle mechanism is provided with: two horizontal kettles which respectively correspond to the two sewing needles 13; a kettle gear provided on the rotation shaft of each horizontal kettle; and a transmission gear fixedly provided to the lower shaft and applying a rotational driving force to each of the pot gears.
The lower shaft is applied with a rotational driving force from an output shaft of the sewing machine motor 16 through a timing belt. When the lower shaft is rotationally driven, the rotational driving force is transmitted to the tank gear via the transmission gears, and the horizontal tanks are rotated via the tank shafts. When the leading end of the sewing needle 13 is lowered to the lower side of the needle plate 15, each horizontal pot catches the thread from the sewing needle, and the horizontal pot is rotated to pass through the thread loop of the thread to insert the lower thread, thereby performing the operation of winding the thread and the lower thread.
[ hemming presser foot mechanism ]
The hemming presser foot mechanism comprises: a hemming presser foot 12 having an inverted T-shaped cross-sectional shape as viewed from the conveying direction of the main fabric C, and configured to wind a molding fabric and feed the molding fabric in the longitudinal direction; and a support mechanism (not shown) for supporting the hemming presser foot 12 in a liftable manner.
The hemming presser foot 12 is composed of a bottom plate facing the upper surface of the table 11, and a vertical plate vertically provided on the upper surface of the flat plate and having an inverted T-shape in cross-sectional view.
The hemming presser foot 12 is disposed behind the sewing needle 13, and is supported by the support mechanism such that a front end portion thereof approaches the sewing needle 13 when the hemming presser foot 12 is lowered.
The support mechanism is provided with: an unillustrated air cylinder serving as a driving source for the raising and lowering operation of the hemming presser 12; a solenoid valve 18 that drives the cylinder; and a plurality of link bodies for converting the driving force of the cylinder into a moving force in the vertical direction and applying the force to the hemming presser foot 12.
In addition, at the time of sewing, the hemming presser foot mechanism lowers the hemming presser foot 12 by the air cylinder, and cooperates with a pair of large presser feet 21 of a large presser foot feed mechanism 20 described later to hold the molding cloth by the pair of large presser feet 21 in a state where both ends in the Y axis direction of the molding cloth are folded back toward the upper surface of the bottom plate of the hemming presser foot 12 so as to be in the cross-sectional shape of the hemming presser foot 12, that is, in a state where the hemming presser foot 12 is wrapped and the inverted T shape is traced. Further, if the large presser foot 21 moves forward, the molding cloth slides out from the hemming presser foot 12 and is conveyed forward together with the main cloth C while maintaining the state of following the inverted T shape, and the two end portions of the molding cloth folded back along the bottom plate of the hemming presser foot 12 to be doubled are respectively dropped and sewn to the main cloth C.
[ Large presser foot feed mechanism ]
The large presser foot feed mechanism 20 includes: a pair of large presser feet 21 (one of which is not shown) which press the main fabric C from above at positions on both sides across the sewing needle 13; a support body 22 for supporting the large presser feet 21 in a liftable manner; a cylinder 23 for moving the large presser foot 21 up and down with respect to the support 22; a solenoid valve 24 that controls driving of the cylinder 23; a presser foot motor 25 which moves the main cloth C pressed by the large presser foot 21 in the cloth feeding direction; and a ball screw mechanism 26 that converts the rotational driving force of the presser motor 25 into a linear driving force in the X-axis direction and transmits the linear driving force to the support body 22.
Each large presser foot 21 is a flat plate having a wedge shape in cross-sectional view and a rectangular shape in plan view, and is supported by the support 22 with its longitudinal direction being along the X-axis direction. The two positions, which are switchable between the upper and lower positions by the driving of the air cylinder 23, are separated from the upper surface of the table 11 in the upper position, and are lowered to be close to the upper surface of the table 11 in the lower position.
The ball screw mechanism 26 supports the support body 22 on the table 11 movably in the X-axis direction, and the movable range of the rear end portions of the two large presser feet 21 supported by the support body 22 is set so as to move from the vicinity of the rear end portion of the table 11 to the vicinity of the corner cutter mechanism 90 located on the front side of the sewing needle 13.
[ Angle knife mechanism ]
The corner cutter mechanism 90 is disposed below the table 11 and on a passage of the large presser foot 21 of the large presser foot feed mechanism 20, and the corner cutter 91 constituted by the pair of cutters 91a and 91b is caused to penetrate the main fabric C conveyed to the working position of the corner cutter 91 from below by the large presser foot feed mechanism 20, thereby forming substantially V-shaped slits V at positions at both ends of the linear slit.
That is, the corner cutter mechanism 90 includes: an air cylinder 92 for moving the corner cutter 91 up and down; a solenoid valve 93 that drives the cylinder 92; and a drive motor 94 for moving and positioning the cutter blade 91a in the X-axis direction.
The cross-sectional shape of the corner cutter 91 as viewed from above is formed in a V-shape, and each main fabric is penetrated from below to form a V-shaped cut.
That is, if the main fabric C on which the stitch and the linear slit are formed is fed to a predetermined position downstream of the movable knife 14 in the fabric feeding direction by the large presser foot feeding mechanism 20, the knife 91a is positioned below one end side of the slit by the driving of the driving motor 94, and then the two knives 91a and 91b are raised to form two V-shaped slits.
[ Mark irradiating device ]
The mark irradiation device 30 includes: a long support plate 31 extending in a cantilever manner from the upper surface of the front end of the arm 83 of the sewing machine frame 80 toward the upstream side in the cloth feeding direction; belt pulleys 32, 32 for the conveyor belt, which are respectively disposed at one end and the other end of the support plate 31; a conveyor belt 33 that is bridged between the two pulleys 32, 32; a target positioning motor 34 as an irradiation position driving unit, which is a stepping motor that rotationally drives one pulley 32; and a target position indicator 35 fixed to the conveyor belt 33 and arbitrarily positioned in the cloth feeding direction by the rotation of the target positioning motor 34.
The target position display 35 includes, for example, an LED, a laser light source, and the like, and irradiates, for example, a point mark, which is a linear point light, vertically downward.
The mark irradiation device 30 supports the target position indicator 35 along a line passing through the midpoint of the needle drop positions 15a of the two needles 13 and extending in the X-axis direction so as to irradiate a range on the upstream side in the cloth feeding direction from the needle drop positions 15 a.
Specifically, the mark irradiation device 30 irradiates the point mark to indicate a front reference position F for positioning the sewing start position of two predetermined stitches to be performed on the main fabric C and the molding cloth and a rear reference position R for positioning the sewing end position of the two predetermined stitches to be performed on the main fabric C, at the rear side of the needle drop position 15a (sewing position) of the two sewing needles 13. Further, the front reference position F and the rear reference position R are both at positions where the distance from the sewing position is known and fixed, and the distance from the sewing position is recorded in the memory of the control device 60.
When the reference positions are instructed to the operator of the sewing machine, the target position indicator 35 is conveyed to a preset front reference position F or rear reference position R by driving the target positioning motor 34, and the point mark is irradiated.
Thus, the operator of the sewing machine can place the main cloth in an appropriate arrangement by aligning the reference position marked on the main cloth C with the irradiation position of the point mark on the table 11.
[ Lining cloth supply device ]
Fig. 4 is an oblique view of the lining cloth feeding device 40, fig. 5 is a front view, and fig. 6 is a sectional view taken along the line V-V of fig. 4.
As shown in these figures, the lining cloth supply device 40 includes: an interlining fabric holding section 41 that rotatably holds the roll Sr around which the band-shaped interlining fabric S is wound; a guide section 42 for guiding the strip-shaped interlining fabric S from the interlining fabric holding section 41 to the opening 111 of the table 11; a drawing drive unit 44 for drawing the strip-shaped interlining fabric S to the opening 111; a state switching part 46 for switching the state of stopping the supply of the lining cloth S and the state of releasing the stopping along with the conveying of the large presser foot 21; and a cutting section 48 for cutting the strip-shaped interlining fabric S in the vicinity of the opening 111.
The interlining fabric holding section 41 is located below the interlining fabric supply device 40, and includes: a roller cover 411 that rotatably supports the roller Sr around the Y axis; and a roller mounting plate 412 that fixes the roller cover 411 to the table 11.
The roll Sr is a roll obtained by winding an endless belt-shaped lining cloth S, and is cut by a cutting section 48 described later after being supplied from the opening 111 by a required length at the time of supply.
The guide section 42 includes: a first cross guide 421 in the form of a flat plate along the Y-Z plane; a second cross guide 422 having a flat plate shape, which is closely opposed to the first cross guide 421 and extends along the Y-Z plane; a flat plate-like third cross guide 423 extending from the upper end of the first cross guide 421 toward the opening 111 obliquely upward; a flat plate-like fourth cross guide 424 closely opposed to the upper surface of the third cross guide 423; and two guide plates 425 and 426 provided between the third and fourth cross guides 423 and 424 and the opening portion 111.
The first to fourth crossing guides 421 to 424 are all metal plates having a width larger than the lining cloth S.
The lower end of the first cross guide 421 is bent forward, and the front end thereof is bent downward. A slit along the Y-axis direction is formed in a tip end opening bent downward.
The lower end of the second cross guide 422 is bent backward at substantially the same height as the bent portion of the first cross guide 421, and the upper end of the second cross guide 422 is bent forward while extending upward from the upper end of the first cross guide 421.
The first cross guide 421 and the second cross guide 422 are fixedly supported by a cross guide base 461 of the state switching portion 46, which will be described later, in a state of being closely opposed to each other with a gap therebetween.
The strip-shaped interlining fabric S drawn out from the roll Sr passes through the slit of the first cross guide 421, passes between the first cross guide 421 and the second cross guide 422, and is guided to the rear end portions of the third and fourth cross guides 423 and 424 by the curved portion of the upper end portion of the second cross guide 422.
The third cross guide 423 and the fourth cross guide 424 are vertically arranged and closely face each other, and are fixedly supported by a support block 441 of the drawer driving unit 44.
Rear end portions of the third and fourth cross guides 423 and 424 are close to an upper end portion of the second cross guide 422, and a driving feed roller 442 of the drawing drive unit 44, which will be described later, is disposed between the upper end portion of the second cross guide 422 and the rear end portions of the third and fourth cross guides 423 and 424. The main feed roller 442 is disposed so that the outer peripheral surface thereof is in contact with the interlining fabric S that spans from the second cross guide 422 to the third and fourth cross guides 423 and 424.
The interlining fabric S having passed through the first and second cross guides 421 and 422 is guided to the proximal end of the opening 111 by the third and fourth cross guides 423 and 424.
The opening 111 of the table 11 is present on the extension lines of the third and fourth cross guides 423 and 424, and two guide plates 425 and 426 are disposed at the proximal ends thereof. These guide plates 425 and 426 are fixedly provided on the lower surface side of the table 11 so that the third and fourth cross guides 423 and 424 open and gradually narrow as they approach the opening 111. As described above, the two guide plates 425 and 426 are arranged such that the third and fourth cross guides 423 and 424 are opened and gradually narrowed, and thus reliably guide the interlining cloth S passed through the third and fourth cross guides 423 and 424 to the opening 111.
Further, between the third and fourth cross guides 423 and 424 and the two guide plates 425 and 426, the movable knife 481 and the fixed knife 482 of the cutting unit 48 are arranged.
The extraction drive unit 44 includes: a support block 441 fixedly supported by the table 11 above the lining cloth holding portion 41; a driving feed roller 442 rotatably supported about the Y axis at a rear end portion of the support block 441; a driven feed roller 443 rotatably supported about the Y axis by the aforementioned cross guide base 461; a drawing motor 444 serving as a driving source for the drawing operation of the liner S; a motor mounting plate 445 fixed to the table 11 and supporting the drawer motor 444; a drive sprocket 446 provided on an output shaft of the extraction motor 444; a driven sprocket 447 concentrically coupled to the driving feed roller 442; and a timing belt 448 which is stretched between the drive sprocket 446 and the driven sprocket 447.
The extraction drive portion 44 is a mechanism that performs a feeding operation for bringing the leading end portion of the lining S extracted from the roll Sr of the lining holding portion 41 into a state of protruding a predetermined length from the opening 111 of the table 11. If the lining cloth S extends outward from the opening 111 to a certain extent, the lining cloth S is caught by friction with the lower surface of the large presser foot 21 or the lower surface of the cloth held by the large presser foot 21 and is conveyed together with the large presser foot 21. The predetermined length of the front end of the liner S drawn out from the opening 111 by the drawing drive portion 44 is a length sufficient for the large presser foot 21 to catch the liner S and draw out the liner S in the conveyance direction.
That is, the drawing drive unit 44 draws only the leading end of the interlining cloth S and does not contribute to the conveyance of the interlining cloth S during sewing.
An opening 111 through which the interlining cloth S is drawn out is formed at a front reference position on the upper surface of the table 11.
In the extraction driving unit 44, the torque of the extraction motor 444 is transmitted from the drive sprocket 446 to the driven sprocket 447 via the timing belt 448, and the drive feed roller 442 is rotated.
The driven feed roller 443 has a smaller diameter than the driving feed roller 442 and is disposed in contact with an upper portion of the outer peripheral surface of the driving feed roller 442. The cross guide base 461 supporting the driven feed roller 443 is attached to the support block 441 so as to be swingable about the Y axis at a position forward of the driven feed roller 443. Accordingly, the driven feed roller 443 can swing up and down, and can be switched between a state of being in contact with the outer peripheral surface of the driving feed roller 442 and a state of being separated upward.
When the liner S is conveyed to the opening 111, the driven feed roller 443 is in contact with the driving feed roller 442 due to the own weight of the cross guide base 461 and the driven feed roller 443, the driving feed roller 442 and the driven feed roller 443 hold the liner S with an appropriate load, and the driving feed roller 442 does not idle and can convey the liner S.
The state switching unit 46 includes: a cross guide base 461 swingably supported by the support block 441 of the aforementioned pull-out drive portion 44; a unclamping cylinder 462 for pushing up the driven feed roller 443 via the cross guide base 461; a lock cylinder 463 for pushing down the driven feed roller 443 via the cross guide base 461; and a cylinder base 464 that supports the cylinders 462, 463.
The cross guide base 461 includes: a main body portion 461a which is a rectangular flat plate along the Y-Z plane; a pair of arm portions 461b extending forward from both ends in the Y-axis direction of the upper end of the front surface of the main body portion 461 a; and an abutting plate 461c provided near the upper end of the rear surface of the body 461a and abutting against the plunger of the unclamping cylinder 462.
The front end portions of the pair of arm portions 461b are rotatably coupled to the support block 441 of the drawer drive unit 44 about the Y axis, and the intermediate portions of the pair of arm portions 461b individually rotatably support both end portions of the driven-feed roller 443.
In addition, the main body portion 461a holds the first cross guide 421 and the second cross guide 422 on the front surface side thereof. The first cross guide 421 and the second cross guide 422 project downward from the lower end of the main body 461 a.
The release cylinder 462 is fixedly supported by the cylinder base 464 in a state in which the plunger is upwardly projectable. Further, the abutment plate 461c of the cross guide base 461, which projects rearward from the upper end of the rear surface of the main body portion 461a, is disposed above the plunger of the unclamping cylinder 462, and the rear end of the cross guide base 461 can be pushed upward via the abutment plate 461c by the projection of the plunger.
As a result, as shown in fig. 7, the driven feed roller 443 supported by the pair of arm portions 461b can be separated from the driving feed roller 442, and the liner S can be released from the state of being restrained by the rollers 442 and 443. When the liner S is caught by the large presser foot 21 and conveyed, the above-described loosened state is set so that the rollers 442 and 443 do not apply resistance to the pulled-out liner S.
The lock cylinder 463 is fixedly supported by the cylinder base 464 in a state where the plunger is protrudable forward. The second cross guide 422 extending downward from the lower end of the main body portion 461a of the cross guide base 461 is disposed in front of the plunger of the locking cylinder 463, and the rear end of the cross guide base 461 can be pushed downward via the second cross guide 422 by the projection of the plunger.
As a result, as shown in fig. 8, the driven feed roller 443 supported by the pair of arm portions 461b and the driving feed roller 442 can be brought into pressure contact with each other, and the liner S passing between these rollers 442, 443 can be restrained against the large presser foot 21.
As described above, the release cylinder 462 is set to the plunger retreated state and the lock cylinder 463 is set to the plunger projected state, so that the driven feed roller 443 and the driving feed roller 442 are brought into pressure contact with each other, and a "non-feeding state" or a "feeding-blocked state" can be established for the liner S.
Further, by setting the unclamping cylinder 462 in the plunger projecting state and the lock cylinder 463 in the plunger retreating state, the driven feed roller 443 is separated upward, and the "feedable state" or the "blocked release state" can be established for the liner S.
In addition, by setting both the unclamping cylinder 462 and the lock-up cylinder 463 to the plunger retreated state, the driven feed roller 443 comes into contact with the driving feed roller 442 by its own weight, and this state is set to the "neutral state".
That is, the unclamping cylinder 462 and the locking cylinder 463 function as an actuator for switching between a state in which the lining cloth S can be supplied and a state in which the lining cloth S cannot be supplied in association with the conveyance of the large presser foot 21.
The cutting unit 48 includes: a movable knife 481 that moves up and down the blade edge upward at the upper front end of the support block 441 of the extraction drive unit 44; a fixed knife 482 fixed to the lower surface of the table 11 with the blade tip facing the movable knife 481; and a cutter cylinder 483 for applying an elevating operation of the movable cutter 481 attached to the upper front end portion of the support block 441.
As described above, the movable knife 481 and the fixed knife 482 are disposed between the front end portions of the third and fourth intersecting guides 423 and 424 and the rear end portions of the two guide plates 425 and 426, and can cut the interlining fabric S passing through between the front end portions and the rear end portions by the raising operation of the movable knife 481.
[ control System of Panel Sewing machine ]
As shown in fig. 3, the control device 60 is connected to: a display panel 64 for displaying various settings related to sewing and the current state of the sewing machine; a setting switch 65, which is attached to the display panel 64 and functions as a setting input unit for selecting a screen for performing various settings and inputting commands and numerical values; and an operation pedal 68 which inputs the start of sewing.
The operation pedal 68 is a means for inputting a drive command for the sewing operation to the control device 60 by a stepping operation. That is, if the operating pedal 68 is depressed, the control device 60 performs operation control for starting sewing.
The setting switch 65 is used by the operator to set various parameters for performing the fillet sewing, for example, a sewing pitch and a rotation speed of the sewing machine motor 16, such as a sewing length C of the fillet sewing which is a parameter when the interlining fabric S is sewn as shown in fig. 9, which of the pre-setting reference and the post-setting reference of the main fabric C and the fillet fabric is performed, a sewing start side length a which is a length from the front end portion of the interlining fabric S to the sewing start position, and a sewing end side length b which is a length from the rear end portion of the interlining fabric S to the sewing end position.
Since the total value of the sewing length c, the sewing start side length a, and the sewing end side length b corresponds to the length of the supplied interlining fabric S, the setting switch 65 functions as a "length setting unit for setting the length of the interlining fabric to be supplied".
In addition, the distance Fc from the front reference position F to the sewing position N and the distance Rc from the rear reference position R to the sewing position N shown in fig. 9 are fixed values, and the control device 60 always stores the values.
The controller 60 is connected to the sewing machine motor 16, the presser foot motor 25, the cutter motor 17, the drive motor 94 for the angle cutter, the target positioning motor 34, and the extraction motor 444, which are controlled by the controller 60, via the respective drivers 16a, 25a, 17a, 94a, 34a, and 444 a.
An encoder 251 for detecting the amount of rotation is attached to the presser motor 25, and the encoder 251 is connected to the control device 60 via a counter 251a for counting the output pulses.
Further, the control device 60 is connected to solenoid valves 18, 24, 93, 465, 466, 484 for controlling operations of a cylinder for moving the hemming presser foot 12 up and down, a cylinder 23 for moving the large presser foot 21 up and down, a cylinder 92 for moving the corner cutter 91 up and down, a release cylinder 462 for releasing the lining cloth supply device 40, a lock cylinder 463, and a cutter cylinder 483 via actuators 18a, 24a, 93a, 54a, 26a, 27 a.
The controller 60 is connected to a light source of the target position display 35 via the driver 35 a.
The control device 60 includes: a CPU61 that performs various controls; and a memory 62 in which various functions of the welt sewing machine 10, which will be described later, a control program for executing an operation, control data, or various sewing data are written.
The memory 62 stores all the various parameters for performing the panel sewing (sewing pitch, rotation speed of the sewing machine motor 16, which is the setting of which of the pre-reference and the post-reference the main fabric C and the panel cloth are placed, the sewing start side length a of the lining cloth S, the sewing end side length b of the lining cloth S, and the like) inputted from the setting switch 65. That is, the memory 62 functions as a storage unit.
The CPU61 executes a control program stored in the ROM 62 to control the release cylinder 462 and the lock cylinder 463 at an appropriate timing when sewing the rear reference position R, and to switch the state of the interlining fabric S from the "supply-blocked state" to the "blocked-released state" by switching the state of the interlining fabric S from the "supply-blocked state" to the "supply-released state" in order to solve the problem that the interlining fabric S is pulled out by an extra length and sewn when the main fabric C and the insert fabric are placed at the rear reference position R.
[ Sewing operation of Lining cloth supply control including rear reference position ]
The sewing operation control including the interlining supply control in the case where the cloth is arranged at the rear reference position R and the sewing is performed will be described in detail with reference to the timing chart of fig. 10 and the flowchart of fig. 11.
Before starting sewing, the front end of the lining cloth S is pulled out forward from the opening 111 by the sewing start side length a (see fig. 9), the release cylinder 462 of the lining cloth supply device 40 is controlled to be in the plunger retreated state, the lock cylinder 463 is controlled to be in the plunger projected state, and the driven feed roller 443 is in the state of stopping the supply of the lining cloth S (the state of fig. 8).
In the above state, if the start of sewing is input from the operator by operating the pedal 68, the CPU61 of the control device 60 controls the target positioning motor 34 and the target position display 35 to irradiate the rear reference position on the upper surface of the table 11 (step S1).
Then, if the operator places the sewing end position pair of the cloth on the table 11 at the rear reference position R and performs the re-depressing operation of the operation pedal 68 indicating that the placement is completed (step S3), the CPU61 controls the air cylinder 23 to lower the large presser foot 21 and hold the cloth at the rear reference position (step S5).
Then, the CPU61 starts the driving of the presser motor 25 and starts the feeding to the sewing position N of the cloth (step S7, FIG. 10: T1).
Further, the CPU61 of the control device 60 controls the presser foot motor 25 of the large presser foot feed mechanism 20 so that the first feed speed of the cloth before the start of sewing (idle feed) is set to a high speed and the second feed speed of the cloth after the start of sewing is set to a low speed. That is, the conveyance from the start of conveyance to the start of sewing is performed at a high speed.
Next, the CPU61 determines whether the cloth has reached the interlining feeding position based on the pulse count value of the encoder 251 of the presser motor 25 (step S9). Since the sewing start position of the cloth reaches the opening 111 (front reference position), the interlining cloth supply position is determined by whether or not the interlining cloth is moved forward by a distance (Rc-c-Fc) from the start of the conveyance.
If the cloth does not reach the interlining cloth feeding position, the determination is repeatedly performed, and if it does (fig. 10: T2), the CPU61 controls the unclamping cylinder 462 to the plunger projecting state, controls the lock cylinder 463 to the plunger retreating state, switches the driven feed roller 443 to the upward separated state, and switches to the "blocked release state" of the feeding of the interlining cloth S (the state of fig. 7, step S11).
Thus, the lining cloth S is released from the restraint by the driven feed roller 443, is pulled out forward by friction with the clothing held by the large presser foot 21, and is conveyed together with the clothing.
Next, the CPU61 determines whether the sewing start position of the cloth has reached the sewing position N based on the pulse count value of the encoder 251 of the presser foot motor 25 (step S13). The arrival at the sewing position N is determined by whether or not the sewing machine advances by a distance (Rc-c) from the start of conveyance.
If the cloth does not reach the sewing position N, the determination is repeatedly performed, and if it reaches (fig. 10: T3), the CPU61 stops the driving of the presser foot motor 25 instantaneously, and then restarts the driving to switch to the conveyance at a low speed (step S15). Further, the driving of the sewing machine motor 16 is started in synchronization with the stop of the presser foot motor 25, and the sewing by the vertical movement of the two sewing needles 13 is started.
Since the presser foot motor 25 cannot be stopped instantaneously in reality, but is stopped after being gradually decelerated, the presser foot motor 25 reaches the sewing position N in step S13, and more precisely, it is determined that the presser foot motor 25 reaches a position before the presser foot motor reaches the sewing position N by a distance required for stopping.
Next, the CPU61 determines whether or not the predetermined end position of the liner S has reached the liner cutting position based on the pulse count value of the encoder 251 of the presser foot motor 25 (step S17).
The lining cloth cutting position indicates a cutting position at which the predetermined end position of the lining cloth S reaches the cutting portion 48. The predetermined end position of the lining cloth S is a position located rearward by the length b of the sewing end side from the sewing end position, and if it is assumed that the cutting position of the cutting portion 48 is located rearward by the distance n from the opening portion 111 (front reference position), the arrival of the cutting position of the lining cloth is determined by whether or not the lining cloth advances by the distance (Rc + b-Fc-n) from the start of the conveyance.
If the cloth does not reach the interlining cutting position, the determination is repeatedly performed, and if the cloth reaches (fig. 10: T4), the CPU61 controls the unclamping cylinder 462 to the plunger retreating state, controls the cutter cylinder 483 to the plunger projecting state, sets the driven feed roller 443 to the neutral state, and cuts the interlining S (the state of fig. 6, step S19).
Next, the CPU61 determines whether the sewing end position of the interlining fabric S has reached the sewing position N based on the pulse count value of the encoder 251 of the presser foot motor 25 (step S21).
The arrival of the sewing end position to the sewing position N is determined by whether or not the sewing machine advances by the distance Rc from the start of conveyance.
If the sewing end position of the interlining cloth S does not reach the sewing position N, the judgment is repeatedly performed, and if it reaches (FIG. 10: T5), the CPU61 stops the driving of the sewing machine motor 16 (step S23).
Further, the forward movement of the large presser foot 21 is continued, and the cloth is conveyed to the corner cutter mechanism 90, and a V-shaped slit is formed at both end portions of the sewing portion (step S25, FIG. 10: T6).
Then, if the entire cloth is conveyed to the front of the opening 111 (fig. 10: T7), the CPU61 performs the pull-out of the interlining for the next sewing.
At this time, the plunger of the cutter cylinder 483 is retracted so that the interlining cloth S can be inserted. Further, since the driven feed roller 443 is already at the neutral position, the driving feed roller 442 is driven to feed the liner S.
Since the interlining cloth S needs to be pulled out forward from the opening 111 by the sewing start length "a", the pull-out motor 444 is driven by the total distance "a + n" from the cutting position of the cutting portion 48 to the opening 111 (step S27).
At the timing when the pulling out of the lining cloth S is completed (T8 in fig. 10), the CPU61 projects the plunger of the lock cylinder 463 to restrain the lining cloth S (step S29).
Then, if the cloth is conveyed to the conveyance end position, the driving of the presser foot motor 25 is stopped, and the sewing operation is ended.
Further, although the sewing start side length a of the interlining fabric S is made to coincide with the previously extracted length, the sewing start side length a can be adjusted by varying the timing of the interlining fabric supply position T2 in the front and rear directions as indicated by the arrow L in the figure, as shown in fig. 12. For example, if the interlining supply position T2 is changed to be further advanced, the sewing start side length a can be made longer than the previous withdrawal length, and if the interlining supply position T2 is further delayed, the sewing start side length a can be made shorter than the previous withdrawal length.
Further, as shown in fig. 12, the sewing end side length b of the interlining fabric S can be adjusted by varying the timing of the interlining fabric cutting position T4 in the front and rear directions as indicated by an arrow K in the figure. For example, if the interlining cut position T4 is changed to be earlier, the sewing end side length b can be shortened, and if the interlining cut position T4 is delayed, the sewing end side length b can be further increased.
[ Sewing operation including the supply control of the lining cloth including the front reference position ]
The sewing operation control including the interlining supply control in the case where the cloth is placed at the front reference position F and the sewing is performed is the same as the sewing operation including the interlining supply control at the rear reference position R described above except for a part. The difference between the above steps will be described with reference to the timing chart of fig. 10 and the flowchart of fig. 11.
In the welt sewing machine 10, since the opening 111 through which the interlining fabric S is drawn out is arranged to coincide with the front reference position F, in the case of a sewing operation including the interlining fabric supply control at the front reference position, the supply of the interlining fabric S is started together with the start of the conveyance of the cloth.
Therefore, if the release cylinder 462 is changed to the plunger projecting state and the lock cylinder 463 is changed to the plunger retreating state at the cloth conveyance start position T1 and the period from the cloth conveyance start position T1 to the sewing position T3 is further shortened as compared with the timing chart of fig. 10, the timing chart of the sewing operation including the interlining supply control at the front reference position is obtained.
Further, with respect to the flowchart of fig. 11, if the determination of the arrival at the lining cloth supply position T2 in step S9 is omitted and the operation control of the plunger projecting state to the release cylinder 462 and the plunger retreating state to the lock cylinder 463 in step S11 is changed to the one executed in synchronization with the start of driving of the presser foot motor 25 in step S7, the sewing operation including the lining cloth supply control at the previous reference position is a flowchart.
[ Effect of the embodiment ]
The panel sewing machine 10 includes a control device 60, and the control device 60 controls the sewing machine motor 16 and the large presser foot feed mechanism 20 to perform sewing from the sewing start position to the sewing end position of the conveyed cloth in accordance with whether the cloth is disposed at the front reference position F where the sewing start position of the cloth is aligned or the rear reference position R where the sewing end position of the cloth is aligned, which is set on the upper surface of the table 11.
The lining cloth supply device 40 includes a release cylinder 462 and a lock cylinder 463 for switching between a state in which the lining cloth S can be supplied and a state in which the lining cloth S cannot be supplied with the conveyance of the large presser foot 21, and the control device 60 controls the state switching by the release cylinder 462 and the lock cylinder 463 so that the sewing start position of the lining cloth S is aligned with respect to the cloth conveyed by the large presser foot 21 when the cloth is disposed at the rear reference position.
Therefore, when the cloth is arranged at the rear reference position, the sewing of the extra length of the lining cloth S by starting the supply of the lining cloth S together with the start of the conveyance of the large presser foot 21 can be avoided, and the stitch can be formed at the predetermined position on the lining cloth S. Therefore, when sewing is performed at any one of the reference position and the rear reference position, the interlining can be supplied at an appropriate position with respect to the cloth, and the operation of cutting off the extra interlining after sewing can be eliminated.
Further, since the unclamping cylinder 462 and the locking cylinder 463 of the lining cloth supply device 40 can switch between a state of preventing supply against the large presser foot 21 and a state of releasing the supply against the large presser foot 21 with respect to the lining cloth S in a state capable of being supplied along with conveyance of the large presser foot 21, it is possible to reduce the occurrence of a supply failure, improve the reliability of the supply operation, and reduce positional deviation of the lining cloth to perform sewing with high accuracy, as compared with a case where the leading end portion of the lining cloth S is normally set to a retracted state and the leading end portion of the lining cloth S is inserted into the lower side of the large presser foot 21 at a necessary timing.
The welt-sewing machine 10 includes a setting switch 65 as a length setting unit, the lining cloth supply device 40 includes a cutting unit 48 for cutting the supplied lining cloth S, and the controller 60 controls the cutting unit 48 to cut the lining cloth S if the lining cloth S is pulled out by a set length by the large presser foot 21.
Thus, the welt-sewing machine 10 can arbitrarily set the length of the supplied interlining fabric S.
Further, since the setting switch 65 arbitrarily sets the sewing length c, the sewing start side length a, and the sewing end side length b, these parameters can be arbitrarily adjusted, and the sewing of the interlining fabric S can be performed as abundantly as necessary.
[ other example (1) of Lining cloth supply control ]
In the welt sewing machine 10, the front end of the lining cloth S is previously extended from the opening 111 and caught by the large presser foot 21 which moves forward, and the supply is performed, but if the large presser foot 21 moves at a high speed to some extent, the lining cloth S slips and cannot be caught by the large presser foot 21, and the supply is not performed.
Therefore, as shown in fig. 13, the CPU61 may control the presser foot motor 25 to stop driving momentarily when the cloth reaches the lining cloth supply position (fig. 13: T2), and then to restart driving and return to the conveyance at high speed again.
Thus, the front end of the lining cloth S can be reliably captured by the large presser foot 21, and the occurrence of the feeding failure of the lining cloth S can be reduced.
In the examples of fig. 11 and 13, the presser foot motor 25 is controlled to be momentarily stopped at the start of sewing, at the time of switching the feed speed of the cloth, or at the time of supplying the interlining cloth, but the control is not limited to the stop, and the control may be performed so as to temporarily decelerate.
[ other example (2) of Lining cloth supply control ]
As described above, in the welt sewing machine 10, the presser motor 25 is controlled so as to feed at a high speed without idle feed accompanying sewing and to feed at a low speed with sewing.
In this case, if the length of the interlining cloth S to be used is short, the interlining cloth S may reach the interlining cloth cutting position T4 before reaching the sewing position T3, as shown in fig. 14.
In this case, the cloth and the interlining fabric S must be cut at the cutting section 48 while being fed at the idle feed speed, that is, at a high speed.
However, it is difficult to accurately cut the terminal end portion of the liner S drawn at a high speed, and there is a possibility that the forming accuracy of the length of the liner S and the sewing end side length b is lowered.
Therefore, when the arrival of the interlining fabric S at the interlining fabric cutting position T4 is before the arrival at the sewing position T3 at the sewing start position, it is possible to perform the interlining fabric supply control in which the driving of the presser foot motor 25 is stopped instantaneously at the arrival of the cloth at the interlining fabric supply position T2, which is an improvement of the control of fig. 13.
Specifically, as shown in fig. 14, when the driving of the presser foot motor 25 is stopped instantaneously after reaching the lining cloth supply position T2 and then the driving is resumed, the presser foot motor 25 is controlled so that the high speed idle feed speed is not generated at that time, and the feed speed is switched to the low speed feed speed during the conveyance accompanying the sewing.
As described above, by switching the conveyance to the low speed by the presser motor 25 at the liner supply position T2 and thereafter, the terminal end portion of the liner S at the cutting section 48 can be cut with high accuracy in the low speed state even when the liner cutting position T4 is located forward of the sewing position T3.
Whether the cut-off position T4 of the interlining fabric has arrived earlier than the sewing position T3 is determined in advance by the CPU61 of the control device 60 based on the set values of various parameters for performing the panel sewing, and the execution of the control is determined.
That is, if the conveyance distance (Rc + b-Fc-n) to the liner cutting position T4 is shorter than the conveyance distance (Rc-c) to the sewing position T3, control should be executed to switch the conveyance speed to a low speed at the liner supply position T2 and thereafter. If the execution conditions are further simplified, the control device 60 determines to execute control for switching the cloth feeding position T2 and the subsequent transport speeds to a low speed when Fc + n > b + c.
Fig. 15 shows a flowchart for executing the processing of fig. 14.
The CPU61 performs irradiation of the rear reference position by the target position display 35 based on the start of sewing input from the operation pedal 68 (step S31), and lowers the large presser foot 21 (step S35) and starts driving of high-speed conveyance by the presser foot motor 25 if the setting of the cloth based on the rear reference position is completed and the operation pedal 68 is depressed again (step S33) (step S37, FIG. 14: T1).
Next, the CPU61 judges whether the cloth has reached the interlining supply position (step S39), and if so (fig. 14: T2), the CPU61 stops the driving of the presser foot motor 25 momentarily, and then restarts the driving to switch to the low-speed conveyance (step S41).
Then, the CPU61 controls the release cylinder 462 to be in the plunger projecting state, controls the lock cylinder 463 to be in the plunger retreating state, and switches to the "blocked release state" of the supply of the lining cloth S (step S43). Thereby, the interlining S is conveyed together with the cloth.
Next, the CPU61 judges whether or not the predetermined terminal end position of the interlining cloth S has reached the interlining cloth cutting position (step S45), and if so (fig. 14: T4), the CPU61 controls the release cylinder 462 to the plunger retreating state, controls the cutter cylinder 483 to the plunger projecting state, and cuts the interlining cloth S (step S47).
Next, the CPU61 judges whether the cloth has reached the sewing position N (step S49), and if it has reached (fig. 14: T3), the CPU61 stops the driving of the presser foot motor 25 instantaneously, restarts the driving, and performs the low-speed conveyance again (step S51).
Thereafter, the CPU61 judges whether or not the sewing end position of the interlining cloth S reaches the sewing position N (step S53), and if so (FIG. 14: T5), the CPU61 stops the driving of the sewing machine motor 16 (step S55).
Then, the cloth is conveyed to the corner cutter mechanism 90, and a V-shaped slit is formed at both end portions of the sewing portion (step S57, FIG. 14: T6).
Then, if the entire cloth is conveyed to the front of the opening 111 (fig. 14: T7), the CPU61 retracts the plunger of the cutter cylinder 483 and performs the extraction of the interlining by the extraction motor 444 (step S59).
If the pulling out of the lining cloth S is completed (fig. 14: T8), the CPU61 projects the plunger of the lock cylinder 463 to restrain the lining cloth S (step S61).
Then, if the cloth is conveyed to the conveyance end position, the driving of the presser foot motor 25 is stopped, and the sewing operation is ended.
As described above, the control device 60 controls the large presser foot feed mechanism 20 so that the feed speed by the large presser foot feed mechanism 20 is reduced or stopped when the large presser foot 21 holds and starts to feed the lining cloth S, as shown in the lining cloth feed position T2 of fig. 13 and 14 and step S41 of fig. 15, and therefore, it is possible to reduce the occurrence of a capturing failure of the lining cloth S by the large presser foot 21 due to a slip or the like, improve the reliability of the feed operation, and reduce the positional deviation of the lining cloth S to perform sewing with high accuracy.
As described above, the CPU61 of the control device 60 is premised on the case where the presser motor 25 of the large presser foot feed mechanism 20 is controlled so that the first feed speed of the cloth before the start of sewing (idle feed) is set to a high speed and the second feed speed of the cloth after the start of sewing is set to a low speed (see step S15 in fig. 11).
The controller 60 determines whether or not the cutting of the lining cloth S by the cutting unit 48 is performed before the start of sewing (whether or not the arrival of the lining cloth cutting position T4 occurs earlier than the arrival of the sewing position T3) based on the lengths (a, b, c) of the lining cloth set by the length setting unit, and controls the presser foot motor 25 to decelerate and convey at the time and thereafter when the sewing start position reaches the lining cloth supply position T2 when the cutting of the lining cloth S is performed before the start of sewing (step S41 in fig. 15) so that the conveying speed at the time of cutting of the lining cloth S becomes a speed lower than the first conveying speed (the same speed as the second conveying speed).
This makes it possible to cut the end portion of the interlining fabric S drawn out at a low speed, and to cut the interlining fabric S at a more accurate length, thereby improving the accuracy of forming the length of the interlining fabric S and the length b on the sewing end side.
[ others ]
The welt sewing machine 10 controls the release cylinder 462 and the lock cylinder 463 to restrain the front end of the lining cloth S so that the lining cloth S is not pulled out by the large presser foot 21 while the front end is partially extended from the opening 111 and caught by the large presser foot 21, and releases the restraint at a necessary timing to supply the lining cloth S.
However, the supply of the interlining cloth S is not limited to the above configuration.
For example, the structure may be such that the front end of the lining cloth S is not projected from the opening 111, and the large presser foot 21 is waited for in a state where it cannot be caught, and the extraction motor 444 is controlled to extract the lining cloth S from the opening 111 at a necessary timing, and the lining cloth S is caught by the large presser foot 21 and supplied (see T2 in fig. 16).
In this case, the pull-out motor 444 functions as an actuator that can switch between a suppliable state and an suppliable state.
Further, in the case of supplying the lining cloth S by the above-described structure, when the lining cloth S is soft or thin, it may be difficult to feed the lining cloth to the lower side of the moving large presser foot 21 from the opening 111.
In the above case, it is preferable that an auxiliary roller supported rotatably about the Y axis is disposed in front of the opening 111, and the height of the upper end of the outer peripheral surface of the auxiliary roller is substantially equal to the height of the upper surface of the table 11. In this case, since the outer peripheral surface of the auxiliary roller is in contact with the lower surface of the large presser foot 21 and is driven, the leading end portion of the lining cloth S drawn out from the opening 111 can be fed to the lower side of the large presser foot 21 by the auxiliary roller, and the lining cloth S can be appropriately supplied.
Further, the setting switch 65 may be used to switch the following control: a control for releasing the restraint and supplying the lining cloth S at a required timing in a state where a part of the front end of the lining cloth S is extended from the opening 111; and a control for controlling the drawing motor 444 to draw the lining cloth S from the opening 111 and supplying the lining cloth S at a required timing without the tip end of the lining cloth S protruding from the opening 111.

Claims (8)

1. A welt sewing machine is provided with:
a large presser foot feeding mechanism which is provided with a large presser foot, presses the cloth loaded on the workbench from the upper part and conveys the cloth to the sewing position;
a sewing machine motor for sewing the cloth;
a lining cloth supply device which holds a roller wound with lining cloth below the worktable and supplies the lining cloth from an opening part on the upper surface of the worktable; and
a control device for sewing the conveyed cloth from the sewing start position to the sewing end position corresponding to the cloth being arranged at one of a front reference position set on the upper surface of the table for aligning the sewing start position of the cloth or a rear reference position for aligning the sewing end position of the cloth,
the welt sewing machine is characterized in that,
the lining cloth supply device is provided with an actuator which switches the state that the lining cloth can be supplied and the state that the lining cloth can not be supplied along with the conveying of the big presser foot,
the control device controls the state switching of the actuator so that the sewing starting position of the lining cloth is aligned with respect to the cloth conveyed by the large presser foot when the cloth is arranged at the rear reference position.
2. A welt-sewing machine as set forth in claim 1,
the actuator of the lining cloth supply device switches between a state of preventing the large presser foot from being supplied and a state of releasing the prevention for the lining cloth in a state of being capable of being supplied along with the conveyance of the large presser foot.
3. A welt-sewing machine as set forth in claim 1,
the actuator of the lining cloth supply device draws out the lining cloth to a position where the lining cloth can be supplied along with the conveying of the big presser foot.
4. A welt-sewing machine according to any one of claims 1 to 3,
the control device controls the large presser foot feeding mechanism so that the conveying speed generated by the large presser foot feeding mechanism is reduced or stopped when the large presser foot is used for holding and conveying the lining cloth.
5. A welt-sewing machine according to any one of claims 1 to 3,
a length setting unit for setting the length of the supplied lining cloth,
the lining cloth supply device is provided with a cutting part which cuts the supplied lining cloth,
the control device controls the cutting part to cut the lining cloth if the lining cloth is pulled out by the set length by the large presser foot.
6. A welt-sewing machine as set forth in claim 4,
a length setting unit for setting the length of the supplied lining cloth,
the lining cloth supply device is provided with a cutting part which cuts the supplied lining cloth,
the control device controls the cutting part to cut the lining cloth if the lining cloth is pulled out by the set length by the large presser foot.
7. A welt-sewing machine as set forth in claim 5,
the control device controls the large presser foot feeding mechanism to enable the first conveying speed of the clothes before sewing is started to be higher than the second conveying speed of the clothes after sewing is started,
the control device is used for controlling the operation of the motor,
determining whether or not the cutting of the interlining by the cutting section is performed before the start of the sewing, based on the length of the interlining set by the length setting section,
when the cutting of the lining cloth is performed before the sewing is started, the large presser foot feeding mechanism is controlled so that the conveying speed when the lining cloth is cut becomes lower than the first conveying speed.
8. A welt-sewing machine as set forth in claim 6,
the control device controls the large presser foot feeding mechanism to enable the first conveying speed of the clothes before sewing is started to be higher than the second conveying speed of the clothes after sewing is started,
the control device is used for controlling the operation of the motor,
determining whether or not the cutting of the interlining by the cutting section is performed before the start of the sewing, based on the length of the interlining set by the length setting section,
when the cutting of the lining cloth is performed before the sewing is started, the large presser foot feeding mechanism is controlled so that the conveying speed when the lining cloth is cut becomes lower than the first conveying speed.
CN201610390961.7A 2015-06-04 2016-06-03 Panel strip sewing machine Active CN106245237B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2015-113548 2015-06-04
JP2015113548A JP6530243B2 (en) 2015-06-04 2015-06-04 Ball edge sewing machine

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CN106245237B true CN106245237B (en) 2020-09-22

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6243508Y2 (en) * 1984-12-20 1987-11-12
JPH1052581A (en) * 1996-08-09 1998-02-24 Juki Corp Binding machine
CN1940163A (en) * 2005-09-30 2007-04-04 重机公司 Pocket mouth pipe edges sewing machine
CN101008138A (en) * 2006-01-27 2007-08-01 重机公司 Automatic piped sewing machine
CN101104984A (en) * 2006-05-01 2008-01-16 Juki株式会社 Binding sewing machine
CN202865560U (en) * 2012-10-21 2013-04-10 鲁泰纺织股份有限公司 Shoulder passing machine provided with insertion strip feeding device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6243508Y2 (en) * 1984-12-20 1987-11-12
JPH1052581A (en) * 1996-08-09 1998-02-24 Juki Corp Binding machine
JP3641324B2 (en) * 1996-08-09 2005-04-20 ジューキ株式会社 Ball stitch machine
CN1940163A (en) * 2005-09-30 2007-04-04 重机公司 Pocket mouth pipe edges sewing machine
CN101008138A (en) * 2006-01-27 2007-08-01 重机公司 Automatic piped sewing machine
CN101104984A (en) * 2006-05-01 2008-01-16 Juki株式会社 Binding sewing machine
CN202865560U (en) * 2012-10-21 2013-04-10 鲁泰纺织股份有限公司 Shoulder passing machine provided with insertion strip feeding device

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JP2016221172A (en) 2016-12-28
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