JPH1066794A - Holing machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a conventional sewing machine combining eyelets and sleeping holes, it is not easy to change or adjust specifications when changing specifications, so it is demanded that specifications can be changed easily. Is coming. SOLUTION: According to a mode set by an eyelet hole mode for performing eyelet buttonhole sewing and a sleephole mode for performing sleephole buttonhole sewing, and a mode set by the mode switching means, A jump feed data creating means for creating jump feed data from the drilling position to the sewing start position or jump feed data from the sewing end position to the drilling position is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can form a desired overlock stitch on a work cloth set on a feed table by driving the movement of a feed table and the rotation of a needle bar by an electric motor. Related to sewing machine.

[0002]

2. Description of the Related Art Conventionally, in this type of hole sewing machine, a lower knife is provided at a position separated from a needle bar by a predetermined distance, and a punching knife which comes into contact with and separates from the upper knife from above. A hammer is provided to be swingable. Then, when the work cloth is set on the feed base and the start switch is pressed, a hole is formed in the work cloth by cooperation of the lower knife and the hammer, and then a distance obtained by subtracting a sewing length from the predetermined distance. The feed bar moves by the amount, and the sewing machine starts. Thereafter, the movement of the feed bar and the rotation of the needle bar are performed by a predetermined amount in synchronization with the vertical movement of the needle bar, so that a desired overhole stitch can be formed.

[0003]

However, in the above-described hole holing machine of the control system, when performing the eyelet overhole sewing, a lower knife and a hammer dedicated to the eyelet hole for forming the eyelet hole are used. Necessary, and similarly, when performing a sleeping hole overlock sewing, a lower knife and a hammer dedicated to the sleeping hole for forming the sleeping hole are required. For this reason, when changing the specification of the buttonhole sewing, a change work such as a change to a lower knife and a hammer according to the specification and an adjustment work are involved, so that the work efficiency is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a hole hog sewing machine that can reduce the time required for changing and adjusting operations when changing the specifications of the button hog sewing. To provide.

[0005]

In order to achieve the above object, according to a first aspect of the present invention, there is provided a boring machine, comprising: a boring mechanism for forming a hole in the work cloth by cooperation of a lower knife and a hammer; A feed mechanism for feeding and moving a feed bar when the needle bar is raised, and a drive for simultaneously driving the needle bar and the looper so as to repeat a seam forming operation for forming a seam on the work cloth by cooperation of a sewing needle and a looper. A mechanism, a rotation mechanism for rotating a looper base and a needle bar provided with the looper, and a stitch data specifying a feed amount of the feed base for each stitch and a rotation angle of the needle bar and the looper base. The eyelet sewing machine provided with a control device for controlling the driving mechanism, the feed mechanism, and the rotation mechanism based on the eyelet eyehole sewing mode, and the sleephole mode sewing the sleeping eyehole sewing machine. Mode switching means for selectively setting the data, and, according to the mode set by the mode switching means, the idle feed data from the punching position to the sewing start position or the idle feed from the sewing end position to the sewing position. Empty feed data creating means for creating data.

The operation will be described in detail. The jump feed data generating means outputs the jump feed data from the punching position to the sewing start position or the jump feed data from the sewing end position to the punching position in accordance with the mode set by the mode switching means. Create feed data. After piercing by the piercing mechanism, the control device controls the feeding mechanism based on the idle feed data created by the idle feed data creating means, and moves the work cloth to the needle bar lower position. Thereafter, the drive mechanism, the feed mechanism, and the rotation mechanism are controlled based on the stitch data. As a result, a buttonhole stitch based on the stitch data is formed on the work cloth.

According to a second aspect of the present invention, there is provided a buttonhole sewing machine according to the first aspect of the present invention, comprising: an input unit for inputting basic data for sewing a buttonhole sewing; A stitch data creating means for creating stitch data including a needle drop position for each needle and a rotation amount of the needle bar.

In operation, the stitch data creating means creates stitch data including a needle drop position for each stitch and a rotation amount of the needle bar based on the basic data set by the input means. The following has the same effect as the first aspect. That is, a desired buttonhole stitch can be easily sewn only by inputting and setting desired sewing basic data.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

[0010] As shown in FIG.
A bed portion 1 having a substantially rectangular box shape is integrally formed with an arm portion 2 continuously extending forward from an upper portion of a rear portion thereof, and is placed on a sewing machine table 16. The sewing machine table 16 has a sewing machine motor 24 (see FIG. 3) as a driving source of a drive mechanism for synchronously driving the needle bar 4, the looper 6a (see FIG. 2), and a hole such as a sewing length as described later. An operation panel (corresponding to input means) 23 for setting basic sewing data for sewing, a foot-operated start switch 20 and the like are provided. Further, as will be described later, a microcomputer for controlling the operation of each mechanism is provided. Is provided.

A needle bar 4 provided with a sewing needle 3 is provided at the lower part of the distal end of the arm portion 2 so as to be vertically movable. Although not shown in detail, the rotation of a main shaft 5 rotated by the driving of the sewing machine motor 24 is provided. The force is transmitted by the cam mechanism and is driven up and down while swinging left and right by a predetermined width. In this case, one rotation of the main shaft 5 causes the needle bar 4 to move up and down twice between a left swing position and a right swing position. The bed unit 1 is provided with a looper base 6 having two loopers 6a facing the needle bar 4, and these two loopers 6a rotate the main shaft 5 via a cam mechanism (not shown). Thus, the needle bar 4 is driven in synchronization with the vertical movement of the needle bar 4.

Further, the needle bar 4 and the looper base 6 are provided in the bed 1 by a .theta.-direction drive motor 26 composed of a stepping motor and a rotating mechanism (corresponding to rotating means) 8 composed of a gear mechanism 7. , Each of which is integrally rotated about a vertical axis in a horizontal plane.

The bed section 1 is provided with a lower knife 9 fixedly disposed on the rear side of the looper base 6, and a punching hammer 10 which comes into contact with and separates from the lower knife 9 from above. It is movably provided. The hammer 10 is driven by a hammer drive mechanism 12 including an air cylinder 11 (see FIG. 3) provided in the bed 1 and cooperates with the lower knife 9 to form an eyelet hole as shown in FIG. Alternatively, a sleeping hole as shown in FIG. 9 is formed in the work cloth.

A feed stand 13 on which a work cloth is set is provided on the upper surface of the bed 1. The feed base 13 has a thin rectangular box shape as a whole, and a portion corresponding to the looper base 6 and the lower knife 9 on its lower surface is open. As shown in FIG. 2, a metal cross plate 14 having an opening 14a is provided on the upper surface of the feed table 13. An X-direction moving mechanism (not shown) that feeds the feed table 13 in the X-direction (left-right direction) by driving an X-direction drive motor (corresponding to an electric motor) 30 in the bed 1. A Y-direction moving mechanism (not shown) that feeds and moves in a Y direction (front-back direction) orthogonal to the X direction by driving a Y-direction drive motor (corresponding to an electric motor) 32 is provided. A cloth holder (not shown) for holding a work cloth is provided on the cross plate 14 at both left and right sides of the opening 14a.

Next, an outline of a control system of the holing machine M will be described with reference to a block diagram of FIG.

The control device 35 of the sewing machine M comprises a microcomputer including a CPU 36, a ROM 37 and a RAM 38, and an input interface 40 and an output interface 41 connected to the microcomputer via a bus 39 such as a data bus. The input interface 40 receives signals from the start switch 20, the presser foot switch 21 connected to the presser foot, the timing signal generator 22, and the operation panel 23.

From the output interface 41,
A drive circuit 25 for the sewing machine motor 24, a drive circuit 27 for the θ-direction drive motor 26, and the hammer drive mechanism 12
In addition to the drive circuit 29 for the electromagnetic switching valve 28 for driving the air cylinder 11 provided in the, the drive circuit 31 for the X-direction drive motor 30, and the drive circuit 33 for the Y-direction drive motor 32, A drive signal and a drive pulse signal are output to each of the operation panels 23. Here, the X-direction drive motor 30 and the Y-direction drive motor 32 are each configured by a stepping motor. The timing signal generator 22 is provided in association with the main shaft 5 of the sewing machine M,
It detects the rotational phase of the main shaft 5 and outputs a phase signal.

The ROM 37 stores a drive control program for controlling the sewing machine motor 24, the various motors 26, 30, and 32, and the electromagnetic switching valve 28, and a control program for a buttonhole sewing control, which will be described later. The R
The AM 38 is provided with various memories, buffers, and the like in addition to the stitch data memory 38a that stores the stitch data of the created buttonhole stitch.

Next, as shown in FIG. 4, the operation panel 23 displays a "sewing length", a "pitch", and a "number of needles at the tip end" as basic data for sewing of the buttonhole sewing. The item names for inputting are described, and a select key 2 for sequentially switching the input of these numerical values for each item is described.
3b, an LED display 23a for displaying a numerical value input for each item, a numerical value up key 23c for changing the input numerical value to the increasing side, and a numerical value down key 23d for changing the numerical value to the decreasing side. In addition, display lamps 23e to 23g are provided for each item to indicate the selection by lighting. Further, a hole shape selection switch 23h is provided for selectively selecting a hole shape from an eyelet hole and a sleeping hole.

Next, a method of creating stitch data and jump feed data will be described with reference to the flowchart of FIG. However, the reference symbol Si (i = 10, 11, 12)
...) represent each step.

When the work clamp switch 21 is operated, the work clamp is turned on, and then S10 is executed. The operation panel 2
In step 3, the numerical values of the "sewing length", "pitch", and "number of stitches at the tip" and the state of the hole shape selection switch 23h are read. Here, the value of “sewing length” is “A”,
The value of “pitch” is “B”, and the value of “tip number of stitches” is “C”.

Next, it is determined whether the state of the hole shape selection switch 23h is an eyelet hole or a sleeping hole (S11). If the state of the hole shape selection switch 23h is eyelet hole, the process proceeds to S12.
To create the eyelet stitch data. The method of creating the eyelet stitch data is described in [Reference number 9607520.
0], and the description is omitted. Next, in S13, the idle feed data for eyelet sewing is created. Here, the attachment position of the lower knife 9 is determined in advance, and the distance from the tip MA of the lower knife to the needle drop position N is L.
It is assumed that Also, the end H in front of the hammer
An eyelet hammer 1 slightly larger than the sewing length A so that B is located at a distance of (LA) from the needle drop position.
0a is assumed to be attached in advance (see FIG. 6). Thus, the idle feed amount F1 for eyelet sewing is F1
= (LA). Next, in S14, it is determined whether the start switch 20 has been pressed. Start switch 20
Is pressed, the process proceeds to S15, and the buttonhole sewing process is executed based on the jump feed data obtained in S13 and the stitch data obtained in S12.

On the other hand, if the state of the hole shape selection switch 23h is a sleep hole, the process proceeds to S16, where stitch data of the sleep hole is created. Since the seam data of the sleeping hole can be created by the same method as that of the eyelet hole, the description is omitted. Next, S
In step 17, skip feed data for sewing a sleeping hole is created. Here, it is assumed that the distance from the lower knife tip MA to the needle drop position N is L as in the case of the eyelet hole. Also,
The end HB in front of the hammer moves from the needle drop position to (LA-
It is assumed that a sleep hole hammer 10b having the same size as the sewing length A is attached in advance so as to be located at the distance D) (see FIG. 7). Note that D is a predetermined distance for causing the sleep hole hammer 10b to contact only the straight portion of the lower knife 9.

As described above, the idle feed amount F2 for sewing the sleeping hole is
Is determined by F2 = (LAD). Next, in S14, it is determined whether the start switch 20 has been pressed. When the start switch 20 is pressed, the process proceeds to S15, and the buttonhole sewing process is executed based on the jump feed data obtained in S17 and the stitch data obtained in S16.

The overhole sewing process will be described in detail. First, an eyelet hole or a sleeping hole is formed in a work cloth by cooperation of the hammer 10 and the lower knife 9. Next, the feed base 13 is moved to the sewing start position. When the feed base 13 has moved to the sewing position, the sewing machine motor 24 is started to start sewing. After that, the needle position X in the X direction
(J), the X-direction drive motor 30 based on the stitch data including the Y-direction needle drop position Y (j) and the rotation angle θ (j).
The Y direction drive motor 32 and the θ direction drive motor 26 are timed and driven. Here, j (= 1, 2, 3,...) Is a stitch number. When the sewing of the last needle is completed, the sewing machine motor 24 is stopped, and the work clamp is turned off. And the feeder 13
To its original position.

In the above-described embodiment, the pre-sewn type sewing process in which sewing is performed after forming eyelets or sleep holes in the work cloth has been described. For example, various changes may be made to the above-described embodiment based on existing technology or a technology obvious to those skilled in the art, such as changing to a scalpel type sewing process.

[0027]

As is apparent from the above description, according to the buttonhole sewing machine according to the first aspect, the eyelet hole mode in which the eyelet buttonhole sewing is performed and the sleephole mode in which the sleephole keyhole sewing is performed are selected. In accordance with the mode switching means to be set uniformly and the mode set by the mode switching means, the jump feed data from the punching position to the sewing start position or the jump feed data from the sewing end position to the punching position is created. Since the jump feed data creating means is provided, when the specifications of the buttonhole sewing are changed, an excellent effect is obtained that only the hammer according to the specifications needs to be replaced.

According to the holing machine according to the second aspect,
An effect similar to that of claim 1 is obtained, but an input means for inputting basic data for sewing of a buttonhole sewing, a needle drop position and a needle bar for each stitch based on the basic data input by the input means. Since the stitch data creating means for creating the stitch data including the amount of rotation is provided, the desired buttonhole stitch can be easily sewn only by inputting and setting the desired basic sewing data.

[Brief description of the drawings]

FIG. 1 is a side view of a boring machine according to an embodiment of the present invention.

FIG. 2 is a partial plan view of a feed stand of the holing machine;

FIG. 3 is a block diagram of a control system of the holing machine.

FIG. 4 is a plan view of an operation panel.

FIG. 5 is a schematic flowchart of a routine of the buttonhole sewing control.

FIG. 6 is an explanatory diagram illustrating a positional relationship between a lower knife and a hammer with respect to a needle drop position during eyelet buttonhole sewing.

FIG. 7 is an explanatory diagram for explaining a positional relationship between a lower knife and a hammer with respect to a needle drop position at the time of a sewing operation of a sleeping hole.

FIG. 8 is an explanatory diagram for explaining a stitch of an eyelet hole buttoning;

FIG. 9 is an explanatory diagram for explaining a seam of a sleeping hole;

[Explanation of symbols]

 M Overhole sewing machine 3 Sewing needle 4 Needle bar 9 Lower knife 10 Hammer 13 Feed bar 23 Operation panel 26 θ axis direction drive motor 30 X axis direction drive motor 32 Y axis direction drive motor 35 Controller 36 CPU 37 ROM 38 RAM

Claims (2)

[Claims] 1. A work cloth set on a feed base,
A hole punching mechanism for forming a hole in the work cloth in cooperation with a lower knife and a hammer, a feed mechanism for feeding and moving the feed base when the needle bar is raised, and a sewing needle. A driving mechanism for simultaneously driving the needle bar and the looper so as to repeat a stitch forming operation for forming a seam on the work cloth in cooperation with the looper, and rotating the looper base and the needle bar provided with the looper. A rotation mechanism, and a control device that controls the drive mechanism, the feed mechanism, and the rotation mechanism based on stitch data that specifies a feed amount of the feed base for each stitch and a rotation angle of the needle bar and the looper base. A mode switching means for selectively setting an eyelet hole mode for performing eyelet buttonhole sewing and a sleephole mode for performing holehole buttonhole sewing, and And a jump feed data creating unit that creates jump feed data from the hole punching position to the sewing start position or jump jump data from the sewing end position to the hole punching position in accordance with the mode set by the means. Sewing machine. 2. An input means for inputting basic data for sewing of the buttonhole sewing, and a stitch including a needle drop position and a rotation amount of a needle bar for each stitch based on the basic data input by the input means. The sewing machine according to claim 1, further comprising a stitch data creating unit that creates data.