JP2001190877A - Staggered sewing machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To make it possible to switch the stitching order of a seamed pattern or the like in which straight stitches and zigzag stitches are alternately repeated, and to use the stitched pattern as a design pattern. To provide a staggered sewing machine that can easily and stably provide a good finish, and can flexibly respond to various sewing processes and usage requirements such as sewing specifications. When stitch data of stitched stitches and linear stitches are alternately repeated in a stitch table by operating respective setting switches 11a to 11f, a stitch at the start of sewing is stored. The setting and setting of the number of stitches when the stitching start is a straight stitch and the setting of the stitch number of the staggered stitch can be switched and stored. Accordingly, the stepping motor 22 is driven based on the position data stored in each data order of the stitch table 42 to selectively switch the movement control of the needle bar 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zigzag sewing machine that forms a zigzag stitch pattern on a sewn object in accordance with a predetermined sewing order of stitch data stored in a memory.

[0002]

2. Description of the Related Art Conventionally, various staggered sewing machines have been proposed. In this type of sewing machine, a cloth is moved and conveyed by a predetermined amount in a predetermined conveying direction while moving in a swing direction orthogonal to the cloth conveying direction. Staggered stitching is performed by intermittently swinging the needle with a pulse motor. The swing amount of the sewing needle in the swing direction that forms the zigzag stitch pattern is created based on the stitch width and stored in the memory, and by selecting the storage pattern, the stitch data is stored on the cloth in a predetermined sewing order. A predetermined zigzag stitch pattern is formed.

For example, Japanese Patent Publication No. 64-11319 discloses a stitch control signal stored in an electronic storage device constituted by a microcomputer, and a sewing machine capable of forming a stitch pattern. And a stitch adjusting device that can adjust at least one of the cloth feed amount, a predetermined portion of a stitch constituting a predetermined pattern is limited for each stitch formation, an adjustment signal is made valid, and a stitch excluding the predetermined portion is formed. Is invalid, the predetermined portion is adjusted based on the adjustment position, and for other portions, the conversion relation is standardly set in the pattern and is fixed by the computer independently of the adjustment position and controlled by the computer. It describes a method for controlling the stitches of an electronic sewing machine. In the electronic sewing machine control method described above,
By arbitrarily adjusting the movement amount of the stitch in the width direction or the feed direction of the stitch with respect to a predetermined stitch, the pattern shape of the previously specified pattern is partially reduced or enlarged as necessary, and the entire pattern is enlarged. As a change in shape.

[0004] For example, Japanese Utility Model Publication No. 6-16602 discloses a sewing machine in which a stitch control signal is stored in an electronic storage device composed of a microcomputer.
The needle position adjusting means has a needle amplitude adjustment mode and a needle base position adjustment mode, and for a specific pattern such as knitting, the needle position is adjusted by the needle base position adjustment mode while the needle amplitude is kept constant. And a computer controlled sewing machine. In the conventional sewing machine described above, when sewing a specific pattern such as a knitting stitch, the needle position is guided at a constant needle amplitude in accordance with the fact that the cloth position guided according to the cloth guide position of the cloth press fluctuates due to the cloth presser. The position is adjusted.

Further, for example, Japanese Patent Publication No. 7-100090 discloses a sewing machine which can form a seam pattern based on a seam control signal including a seam pattern stored in an electronic storage device constituted by a microcomputer. ,
A cross stitch forming device in a computer controlled sewing machine is described in which a cross stitch width setting device and a cross stitch depth setting device are activated in connection with selection of a cross stitch pattern and a cross stitch is formed. ing. In the above-described conventional seam forming apparatus in the sewing machine, the finish of the seam sewing is determined by the seam width setting device and the seam depth setting device which are activated by selecting the seam pattern. The adjustment setting of the sewing depth and the adjustment setting of the knitting sewing width are easily performed.

[0006]

However, in the above-described conventional sewing machine, the amplitude of the needle or the feed amount of the cloth for a specific sewing pattern is adjusted by computer control to adjust the shape of the sewing pattern and the position of the needle relative to the cloth. The sewing order is fixed by computer control, and the start of sewing is always the same even for sewing patterns such as knitting. That is, in the conventional cross-stitch pattern, the stitching can be started from a zigzag stitch where the needle is swayed for the purpose of pressing the folded back cloth. In recent years, the use of sewing patterns such as knot stitches has been increasingly used as design patterns. However, as described above, stitching can be always started from a staggered stitch, so design stitching from the same starting point in a different direction is performed. When applying, staggered seams at the beginning of sewing overlap, which is a design problem. When the sewing is to be started from a straight stitch, the user must manually turn the pulley of the sewing machine before and after the sewing operation to move the needle up and down a predetermined number of times to advance the sewing order. In addition, there is a problem that a large amount of labor is required at the time of starting sewing, and a human error is easily induced, and a stable sewing operation cannot be performed. Furthermore, since the start of sewing is a staggered stitch, and the amount of movement of the needle in the width direction is large, when the needle is moved in the horizontal direction, the thread may be pulled, and the first stitch may fall out. As a result, it is difficult to flexibly respond to various sewing processes and sewing specifications of the user.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems. In a sewing pattern such as a cross-stitch pattern in which straight stitches and zigzag stitches are alternately repeated, the sewing order is switched. By switching the first stitch, when using such a sewn pattern as a design pattern, a good finish can be obtained simply and stably, and it can be used in various sewing processes and sewing specifications. An object of the present invention is to provide a staggered sewing machine that can flexibly respond.

[0008]

According to a first aspect of the present invention, there is provided a zigzag stitch sewing machine which conveys a sewn object in a predetermined conveying direction, and which swings the sewing machine in a direction perpendicular to the conveying direction of the sewn object by an actuator. Swing the sewing needle in the direction
In a zigzag stitch sewing machine that forms a stitch pattern in which a staggered stitch having a predetermined width and a straight stitch having a predetermined number of stitches are alternately formed on a sewn body, when forming a stitch pattern on the sewn body, A sewing start setting means for setting which of a stitch and a straight stitch to start sewing is provided.

In the staggered sewing machine according to the first aspect of the present invention, the zigzag stitch having a predetermined width and the linear stitch having a predetermined number of stitches are alternately repeated by swinging in a direction perpendicular to the conveying direction of the workpiece by the actuator. At this time, the straight stitch and the zigzag stitch are alternately repeated according to the set sewing order based on the sewing start setting means. Therefore, the user manually rotates the pulley of the sewing machine before starting the sewing. There is no need to advance the order, and stitch settings at the start of sewing can be performed simply and stably. Therefore, when using as a design pattern, it is possible to always start sewing from straight stitches by setting the sewing start, so that it is possible to obtain a good finish even when performing multiple design stitches from the same starting point Therefore, it is possible to flexibly respond to use requests such as various sewing processes and sewing specifications.

Further, a staggered sewing machine according to claim 2 is
The staggered sewing machine according to claim 1, further comprising a stitch number setting means for setting the number of stitches forming the straight stitch when the straight stitch is set by the sewing start setting means.

In the staggered sewing machine according to the second aspect, when a straight stitch is set at the start of sewing by the sewing start setting means, the number of stitches forming a straight stitch pattern is set by the stitch number setting means. Thereby, in addition to the effect of the staggered sewing machine described in claim 1, the appearance can be further pursued by finely adjusting the stitches at the start of sewing, which is preferable in design. In addition, when the stitch start is a staggered stitch and the needle moves in the width direction so much that the first stitch comes off, only one stitch at the start of the stitch can be used as a straight stitch. In addition, it is possible to achieve a thread pull-out preventing effect while maintaining the design in which the stitches are staggered at the start.

Further, the staggered sewing machine according to claim 3 is
The sewing object is transported in the predetermined transport direction, and the sewing needle is swung in a swing direction orthogonal to the transport direction of the sewing object by the actuator, so that the zigzag stitch having a predetermined width and the predetermined width are applied to the sewing object. In a staggered sewing machine that forms a stitch pattern that alternates between staggered stitches with a predetermined number of stitches with a small width, a staggered stitch with a predetermined width and a staggered stitch with a small width A sewing start setting means for setting which of the staggered stitches to start sewing is provided.

According to the third aspect of the present invention, the staggered sewing machine has a staggered stitch having a predetermined width and a predetermined number of stitches having a width smaller than the predetermined width by being oscillated by the actuator in a direction orthogonal to the conveying direction of the workpiece. When repeating the staggered seam alternately,
Based on the sewing start setting means, the zigzag stitches having a predetermined width and the zigzag stitches having a small width are alternately repeated in accordance with the set sewing order. Such a seam pattern is advantageous in that when a stretchy cloth is sewn together, the seam can be expanded and contracted in accordance with the elasticity of the cloth, but even in this case, the user must manually It is not necessary to rotate the pulley of the sewing machine to advance the sewing order, and stitch settings at the start of sewing can be performed easily and stably. Therefore, when used as a design pattern, in addition to the design of the stitch pattern, it is possible to always start sewing from a zigzag stitch having a width smaller than the predetermined width by setting the sewing start. A good finish can be obtained even when a plurality of design stitches are performed, and it is possible to flexibly respond to various sewing processes, sewing specifications, and other usage requirements.

Further, the staggered sewing machine according to claim 4 is
The staggered sewing machine according to claim 3, further comprising a stitch number setting means for setting the number of stitches for forming the staggered stitch having a small width when the stitch having a small width is set by the sewing start setting means. It is characterized by the following.

In the staggered sewing machine according to the fourth aspect, when a staggered stitch having a width smaller than a predetermined width is set at the start of sewing by the sewing start setting means, the staggered stitch having a width smaller than the predetermined width is set by the stitch number setting means. Set the number of stitches that form the pattern. Thereby, in addition to the effect of the staggered sewing machine of claim 3,
By finely adjusting the stitches at the start of sewing, the appearance can be further pursued, which is preferable in design. In addition, when the sewing start is a staggered stitch having a predetermined width and the amount of movement of the needle in the width direction is large and the first stitch is pulled out, only one stitch at the start of sewing is reduced to a width smaller than the predetermined width. The staggered stitches can also be used, and the effect of preventing thread pull-out can be achieved while keeping the design in which the stitches start at staggered stitches of a predetermined width.

The staggered sewing machine according to claim 5 is
5. The staggered sewing machine according to claim 1, wherein the sewing position in the predetermined sewing order is reset while forming the stitch pattern in accordance with the predetermined sewing order set by the sewing start setting means. A sewing order resetting means for returning a sewing position to the head of the sewing order is provided.

In the staggered sewing machine according to the fifth aspect, the sewing position in the predetermined sewing order set by the sewing start setting means during the formation of the stitch pattern is reset by the sewing order reset means, and the sewing position is reset to the beginning of the predetermined sewing order. Return the sewing position. Thereby, in addition to the effect of the staggered sewing machine according to any one of claims 1 to 4, when the sewing body is newly replaced and the sewing is started, the sewing position is reset and the sewing position is set at the head of the predetermined sewing order. It can be returned and the stitch at the start of sewing can always be the same.

The staggered sewing machine according to claim 6 is
The staggered sewing machine according to any one of claims 1 to 5, further comprising a staggered stitch number setting means for setting the number of stitches within a predetermined width in the swinging direction.

In the staggered sewing machine according to the sixth aspect, the staggered stitch number setting means sets the number of stitches to be sewn by the sewing needle until the stitch reaches a predetermined width orthogonal to the conveying direction of the sewn object. Thereby, in addition to the effect of the staggered sewing machine according to any one of claims 1 to 5, so-called two-point staggered sewing,
The zigzag stitching by multi-point zigzag, such as three-point zigzag, is performed, so that the design appearance of the zigzag stitch pattern can be improved and the stitching strength can be improved.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a zigzag stitch sewing machine according to the present invention will be described in detail based on an embodiment embodying the present invention with reference to the drawings. First, a schematic configuration of a staggered sewing machine according to the present embodiment will be described with reference to FIG. FIG. 1 is an external perspective view of a staggered sewing machine 1 of the present embodiment.

In FIG. 1, a sewing machine 1 includes a sewing machine bed 3 provided on a work table 9, a pillar 27 standing upright from the right end of the machine bed 3, and a pillar 27. And an arm portion 2 extending leftward so as to face the sewing machine bed portion 3.

The work table 9 is mounted on a work table 21. Below the work table 9 on the work table 21, a drive motor 17 for driving the sewing machine 1 and a control box 25 for performing main control of the sewing machine 1 are attached. A pedal 19 for instructing a sewing operation by the sewing machine 1 is swingably supported at a lower end of the work table 21. The pedal 19 is provided with a connecting rod 23 extending vertically.
Is connected to the control box 25 via the

The pedal 19 can swing between a neutral position, a front depressed position on the toe side with respect to the neutral position, and a depressed position on the heel side with respect to the neutral position. The control box 25 outputs an activation signal corresponding to the position of the pedal to the drive motor 17 side. The control box 25 is a signal for stopping the sewing operation when the position of the pedal 19 is in the neutral position, a signal for executing the sewing operation when the position of the pedal 19 is the front depressed position, and the position of the pedal 19 is the depressed position. In the case of, a signal for executing the sewing end operation is output. Here, the sewing end operation is to perform thread cutting for exchanging the sewing object and stop the sewing needle 16 at the upper side.

When the pedal 19 is in the neutral position and the front depression position, the return switch 19A (see FIG. 3) is in the off state. When the pedal 19 is at the stepping-back position, the stepping-back switch 19A is in the ON state.

The pulley 12 is provided above the right end of the pillar 27. The head of the arm 2 is provided at the left end of the arm 2, and a sewing needle 16 protrudes from below the head in a direction perpendicular to the upper surface of the sewing machine bed 3.
The rotation of the pulley 12 and the vertical movement of the sewing needle 16 are configured to interlock with each other. An operation panel 2C is disposed on the front surface of the arm portion 2. The operation panel 2C includes a sewing start selection switch 11a, a sewing start linear portion stitch number setting switch 11b, a stitch width setting switch 11c, and a linear portion needle. A number setting switch 11d and a staggered part number setting switch 11e are provided.

FIG. 2 is a perspective view of a main part showing a schematic internal configuration of the sewing machine 1. From the lower part of the head of the arm part 2, the sewing needle 1
The tip of the needle bar 4 supporting the projection 6 protrudes. A cloth presser 6 is provided below the head of the arm 2 so as to protrude therefrom. A feed dog 8 is provided on the sewing machine bed 3 at a position facing the cloth presser 6. The feed dog 8 is driven by a horizontal feed mechanism. The horizontal feed mechanism is embodied by, for example, a configuration described in Japanese Patent Publication No. 2623522. Therefore, the sewing object (not shown) placed on the sewing machine bed section 3 is intermittently transported by the feed dog 8 in the sewing object transport direction (the arrow Y direction in the illustration).

A staggered stitch pattern is formed on the sewing object by the sewing needle 16 at the tip of the needle bar 4 which is moved up and down by the driving force transmitted from the driving motor 17 via the belt 10 and the pulley 12. . Here, the operation timing generator 31 detects the rotation of the pulley 12 to
An operation timing signal is generated at the time when the sewing needle 16 moves up and comes out of the sewing object.

The needle bar 4 is held via a U-shaped needle bar holding portion 14 so as to be vertically movable. The needle bar holder 14 is
It is connected to one end of a shaft 18 horizontally arranged in the arm 2. The shaft 18 is held via a shaft holding portion 20 so as to be able to swing in the width direction (the direction indicated by the arrow X in the figure) of the sewing object. Here, the sewing body width direction (arrow X
Direction) is orthogonal to the above-described sewing body conveying direction (arrow Y direction in the drawing). A connecting member 26 is provided near the center of the shaft 18. A stepping motor 22 and a plurality of link members 24 are provided in the pillar 27. The driving force of the stepping motor 22 is transmitted from the plurality of link members 24 via the connecting members 26 to the shaft 18.
It is configured to be transmitted to.

Therefore, the amount of movement of the sewing needle 16 in the width direction of the sewing body (the direction of the arrow X) is determined by the step amount of the stepping motor 22. The step amount of the stepping motor 22 is controlled by a pulse signal generated by a pulse generator 28. The pulse generator 28
Is determined by the stitch data stored in the stitch table 42. That is, the amount of movement of the sewing needle 16 in the sewing body width direction (the direction of the arrow X) is controlled based on the stitch data stored in the stitch table 42.

FIG. 3 is a block diagram showing the main configuration of the control box 25. As shown in FIG. The control box 25 is connected with a pedal 19, a pulse generator 28, a drive motor 17, a stepping motor 22, an operation timing generator 31, an operation panel 2C, a RAM 41, a ROM 43, a CPU 44, a return switch 19A, and the like via a bus 45. It is constituted by that.

The sewing start selection switch 11a is a switch for selecting and instructing whether to start sewing of a preset cross stitch pattern or the like from staggered stitches or from straight stitches.

In addition, the setting switch 1 for the number of stitches in the straight section at the start of sewing
Reference numeral 1b denotes a switch for setting the number of stitches in a linear portion at the start of sewing when starting sewing from a straight stitch in a cross stitch pattern.

The stitch width setting switch 11c is used to set the stitch width of the staggered stitch, which is the width that the movement amount of the sewing needle 16 can take in the width direction of the sewn object (the direction orthogonal to the transport direction of the sewn object). This is a switch for setting.

The straight portion stitch number setting switch 11d is a switch for setting the number of stitches in the entire straight portion along the conveying direction of the sewing object in the case of a knitting pattern or the like. The staggered part score setting switch 11e is used to set the number of stitches until the stitch width of the zigzag stitch in the width direction of the sewn body set by the stitch width setting switch 11c in the case of a cross stitch pattern or the like. This is a switch for setting. From a plurality of staggered stitch patterns (multiple staggered stitch patterns such as a two-point staggered stitch pattern, a three-point staggered stitch pattern, a four-point staggered stitch pattern, etc .; hereinafter, an N-point staggered stitch pattern) The operator can set a desired staggered stitch pattern type.

The RAM 41 has a sewing start selection switch 11
a, stores the setting state of each setting switch of the stitch start switch 11b, the stitch width setting switch 11c, the stitch number setting switch 11d, and the staggered stitch point setting switch 11e, and also stores stitch data. Seam table 4
2 for reading and writing data required for performing various control operations by the control box 25.

The ROM 43 stores various sewing machine control programs such as a stitch data creation program for creating stitch data to be described later and a stepping motor drive control program for moving sewing needles in the width direction to execute a sewing operation to be described later. Contains the program.

The CPU 44 is a central processing unit that controls the entire operation of the sewing machine 1 and executes all processes related to the operation of the sewing machine 1 and manages data.

Next, a stitch data creation program for creating the stitch table 42 of the RAM 41 will be described with reference to FIGS. FIG. 4 is an explanatory diagram showing a flowchart of a stitch data creation program for creating the stitch table 42. FIG. 4 shows the entire processing of the stitch data creation program, and FIG. Is shown. FIG. 6 is an explanatory diagram schematically showing the stitch tables 42 (a) to 42 (f) created by the processing of FIG. Among them, 42 (a) to 42 (c) are schematic diagrams of a so-called two-point staggered pattern in which the staggered portion is formed of two stitches, and straight stitches and staggered stitches each having five stitches are provided. 4 shows a stitch table for eyes. Also, 42 (d) ~
(F) shows a multi-point staggered stitch table in the case where the number of stitches in the staggered portion is 2, 3, and 4, respectively. FIG. 7 shows a sewing pattern sewn based on the stitch data stored in the stitch tables 42 (a) to 42 (f).

In FIG. 4, in step (hereinafter, abbreviated as S) 1, input of a stitch width set by the stitch width setting switch 11c is waited (S1: NO), and when the input is confirmed (S1: YES) The stitch width is stored in the RAM 41 (S2). Next, the input of the number of stitches of the straight portion set by the straight portion stitch number setting switch 11d is waited (S3: NO). When the input is confirmed (S3: YES), the number of stitches of the straight portion is stored in the RAM 41 (S4). ). Further, the control waits for the input of the staggered part number set by the staggered part number setting switch 11e (S5: NO), and when the input is confirmed (S5: YES).
The staggered score is stored in the RAM 41 (S6). Subsequently, when the number of stitches of the linear portion at the start of sewing is designated by the number-of-stitches-of-straight-line-portion setting switch 11b (S7: YES),
Waiting for the input of the number of stitches at the start of sewing (S8: NO), when the input is confirmed (S8: YES), the number of stitches at the start of sewing is stored in the RAM 41 (S9). If the number of stitches at the start of sewing is stored in S9, or if the number of stitches in the linear portion at the start of sewing is not specified (S7: NO), the setting of the stitching start is performed in the staggered portion with the stitching start selection switch 11a. If there is (S10: YES), the staggered portion data is written into the stitch table 42 by the processing described with reference to FIG.
1) Write linear portion data for the number of stitches of the linear portion stored in S4 (S12). When the setting of the sewing pattern at the start of sewing is not a staggered portion but a straight portion (S10: NO),
If the number of stitches at the start of sewing is stored in S9 (S13:
YES), the straight line data for the number of stitches set in S9 is written into the stitch table 42 (S14), the staggered portion data is written from the processing of FIG. 5 (S15), and the remaining straight line data is further written. Write (S16). If the number of stitches at the start of sewing is not stored in S9 (S13: NO), linear portion data corresponding to the number of stitches of the linear portion stored in S4 is written in the stitch table 42 (S17). The zigzag part data is written by the processing of 5 (S18). Then, end data is written at the end of the stitch table 42 (S1).
9).

When writing the staggered portion data in the stitch table 42 in S11, S15 and S18, first write the current coordinates based on the flowchart shown in FIG. Proceed in advance (S21).
Next, it is determined whether or not the zigzag score matches the zigzag score set by the zigzag score setting switch 11e and stored in the RAM 41 (S22 to S24). Then, the writing operation is performed in each step from S22 to S24 and the subsequent steps that match the stored score.

First, when it is determined in S22 that two points are staggered (S22: YES), coordinates obtained by subtracting the stitch width from the current coordinates are written in the data order set in S21 (S45). The data order on the stitch table 42 is advanced by one (S46), and the current coordinates are replaced with the coordinates written in S45 (S47).

Also, instead of two-point staggered (S22: N
O), if it is determined in S23 that the three points are staggered (S23: YES), the coordinates obtained by subtracting the value obtained by dividing the stitch width by 2 from the current coordinates are written in the data order set in S21 ( S48). The data order on the stitch table 42 is advanced by one (S49), the current coordinates are replaced with the coordinates written in S48 (S50), and the number of times of writing is determined. If the number of times of writing is less than two (S51: N
O), the process returns to S48, and the coordinates obtained by subtracting the value obtained by dividing the stitch width by 2 from the current coordinates are written in the set data order (S48). If the number of writings reaches two (S5
1: YES), the coordinates obtained by subtracting the value obtained by dividing the stitch width by 2 from the current coordinates are written in the set data order (S5).
2). The data order on the stitch table 42 is advanced by one (S
53) Replace the current coordinates with the coordinates written in S52 (S54).

Further, the case of N-point staggered operation will be described.
If it is determined in S24 that there are four or more N-point staggered (S24: YES), the stitch width is set to (N-1) from the current coordinates.
The coordinates obtained by subtracting the value divided by the above are written in the data order set in S21 (S25). The data order on the stitch table 42 is advanced by one (S26), the current coordinates are replaced with the coordinates written in S25 (S27), and the number of times of writing is determined. If the number of times of writing is less than (N-1) (S28: NO), the process returns to S25, and the data in which the coordinates obtained by subtracting the value obtained by dividing the stitch width by (N-1) from the current coordinates are set. Write the order (S25). If the number of times of writing reaches (N-1) (S28: YES), the coordinates obtained by adding the value obtained by dividing the stitch width by (N-1) to the current coordinates are written in the set data order (S29). . The data order on the stitch table 42 is advanced by one (S30), and the current coordinates are replaced with the coordinates written in S29 (S3
1) The number of times of writing is determined. If the number of times of writing is less than (N-2) (S32: NO), the process returns to S29, and the coordinates obtained by adding the value obtained by dividing the stitch width by (N-1) to the current coordinates are set. Write in data order (S2
9). This process is repeated until the number of writing reaches (N-2) (S32).

A specific example of stitch data created according to the flowcharts shown in FIGS. 4 and 5 will be described below.
The stitch tables 42 (a) to 42 (a) to 6 (c) in FIGS.
(C) shows a two-point staggered sewing pattern.
In FIG. 6 (a), the stitch pattern starts with a straight stitch, the number of stitches is 5 points, the stitch number at the start of stitching is not specified, and the staggered portion is set to 2 staggered, and the stitch width is a predetermined width. Is set to E. Therefore, a two-point staggered pattern is stored following the straight stitch pattern having five stitches, and the stitch table 42 is stored.
In (a), the coordinates of the sewing needles in each data order are as follows: the straight stitch pattern position A is the data order 1 to 5, the start position A of the two-point staggered is the data order 6, and the stitch width position E is the data order 7 , And the end data is stored in data order 8. The sewing pattern actually sewn is shown in FIG.
It is as follows.

In FIG. 6B, the cross stitch pattern starts with a two-point staggered stitch pattern, the stitch width of which is E of a predetermined width, and
The number of stitches for the straight stitch is set to five. Accordingly, a straight stitch having five stitches is stored following the two-point staggered stitch, and the coordinates of the stitches at each data order in the stitch table 42 (b) are determined by the start position A of the two-point staggered data. In the order 1, the stitch width position E is stored in the data order 2, the straight stitch pattern position A is stored in the data orders 3 to 7, and the end data is stored in the data order 8. The sewing pattern actually sewn is as shown in FIG.

In FIG. 6 (c), the stitch pattern starts from the straight stitch, the number of stitches specified at the start of sewing is 3 points, the number of stitches of the straight stitch is 5 points, and the staggered portion is 2 staggered. And the stitch width is set to a predetermined width E. Therefore, a two-point zigzag stitch follows a straight stitch having three stitches, and a further five stitches.
Two points, which are the remaining number of the straight stitches of the point, are stored. The coordinates of the stitches at each data order in the stitch table 42 (c) are such that the straight stitch position A is in the data order 1 to 3, and the two-point staggered. Start position A is in data rank 4, stitch width position E is in data rank 5, and straight stitch position A is in data ranks 6-7.
, And the end data is stored in data order 8. The sewing pattern actually sewn is as shown in FIG.

The stitch tables 42 (d)-(f) in FIGS. 6 (d)-(f) show 2 to 4 staggered sewing patterns. In FIG. 6 (d), the stitch pattern starts from the two-point zigzag stitch and the stitch width is E of a predetermined width.
In addition, the number of stitches of the straight stitch is set to two. Therefore, a straight stitch having two stitches is stored following the two-point staggered stitch, and the coordinates of the stitches at each data order in the stitch table 42 (d) are the start positions A of the two-point staggered data. At the rank 1, the stitch width position E is stored at the data rank 2, the straight stitch position A is stored at the data ranks 3 and 4, and the end data is stored at the data rank 5. The sewing pattern actually sewn is as shown in FIG.

In FIG. 6 (e), the stitch pattern starts from three staggered stitches, the stitch width is set to E of a predetermined width, and the number of stitches of the straight stitch is set to two points. Therefore, a straight stitch having two stitches is stored following the three-point staggered stitch, and the coordinates of the stitches at each data order in the stitch table 42 (e) are the start position A of the three-point staggered data. In order 1,
The position C which is half the stitch width is in data rank 2, the stitch width position E is in data rank 3, and the position C which is half the stitch width.
Is in data rank 4 and straight stitch position A is in data ranks 5-6.
, And the end data is stored in data rank 7. The sewing pattern actually sewn is as shown in FIG.

In FIG. 6 (f), the cross stitch pattern starts with four staggered stitches, the stitch width is set to E of a predetermined width, and the number of stitches of the straight stitch is set to two points. Therefore, a straight stitch having two stitches is stored following the four-point staggered stitch, and the coordinates of the stitches at each data order in the stitch table 42 (f) are the start positions A of the four-point staggered data. In order 1,
A position B at one-third of the stitch width is in data rank 2, a position D at two-thirds of the stitch width is data rank 3, a stitch width position E is data rank 4, and a stitch width Position D of two-thirds is in data rank 5, and position B of one-third of the stitch width is data rank 6.
, The end data is stored in the linear stitch position A in the data ranks 7 and 8 and in the data rank 9. The sewing pattern actually sewn is as shown in FIG.

Next, based on the data stored in the stitch table 42, the stepping motor 22 controls
The process of swinging the X-ray 6 in the X direction will be described with reference to FIG. FIG. 8 is a flowchart of a drive control program for the stepping motor 22.

In FIG. 8, first, in S33, the position data A of the data order 1 is read in accordance with the sewing order in the stitch table 42, and the stepping motor is moved to move the needle bar 4 to the needle drop position corresponding to the position data. 22 is driven.

Thereafter, in S34, the stitch table 4
After adding 1 to the data rank of the data to be read from 2, the process proceeds to S35. In S35, it is determined whether or not the data order corresponds to end data.

In S35, when it is determined that the data order corresponds to the end data (S35: YES), the data order is made first to read the position data repeatedly, and then the process proceeds to S36. When it is determined that the order does not correspond to the end data (S35: NO), the process directly proceeds to S36. In S36, the position data corresponding to the data order is read from the stitch table 42.

In S37, the movement amount (oscillation amount) of the needle bar 4 (the sewing needle 16) is calculated by subtracting the current position data (the position data read in S33) from the position data read in S36. . In the following S38, it is determined whether or not an operation timing signal has been generated from the operation timing generator 31. Operation timing generator 3
1 when the operation timing signal is generated (S3
8: YES), the stepping motor 22 is driven by the movement amount calculated in S37, and the process returns to S34.

In S38, if it is determined that the operation timing signal is not generated from the operation timing signal generator 31 (S38: NO), the processing after S40 is performed.

In step S40, the foot switch 19A is turned off.
It is determined whether or not N has been set, and the return switch 19
If A is not ON (S40: NO), S is executed again.
Return to 38. On the other hand, if the return switch 19A is ON (S40: YES), the process proceeds to S41. Thereby, the stitch order of the stitch data stored in the stitch table 42 is reset.

In S41, the data order of the position data read from the stitch table 42 is made first, and
At S42, the position data corresponding to the data order is read. Thereby, the sewing position is reset, the sewing position can be returned to the head of the predetermined sewing order, and the sewing can be started from the same stitch. Further, in S43, S42
By subtracting the data of the current position from the position data read in, the movement amount (oscillation amount) of the needle bar 4 (sewing needle 16) is calculated. Note that this movement amount is the movement amount to the position of the first stitch data. Thereafter, the process returns to S38.

Here, each of the above-mentioned processes will be specifically described based on each data, taking the stitch table 42 (a) as an example. In the following description, it is assumed that data is read from the position data of the first data rank.

First, the first position data A in the data order is read, and the stepping motor 22 is driven based on the position data A to move the needle bar 4 to the needle drop position corresponding to the position data A (S33). . Thereafter, the position data A of the data order 2 is read by adding the data order by 1, and the current position data A is subtracted from the position data A of the data order 2 to obtain the needle bar 4.
Is calculated (S34, S35: NO, S3
6, S37). In this case, the moving amount of the needle bar 4 is zero at the straight stitch of the cross stitch pattern. Each time an operation timing signal is generated from the operation timing generation device 31, the stepping motor 22 corresponds to the amount of movement.
Is driven to move the needle bar 4 (S38: YES, S
39). Each of the above processes is performed from the third position data A to the seventh position data E in the data order of the stitch table 42 (a).
The same is done until. When the processing for the position data E is completed, the data becomes end data (S35:
YES), returning to the position data A having the first data rank again, and performing the same processing. The above process is a process for forming a cross stitch pattern. In addition, the stitch table 42 (b)-
Similar processing is performed for (f).

Here, with respect to each component constituting this embodiment, the stepping motor 22 corresponds to the actuator according to claims 1 and 3, and the stepping motor 22 swings in a direction perpendicular to the direction in which the sewing object is conveyed. The swing amount of the sewing needle is determined by the step amount of the stepping motor 22.
The stitching start selection switch 11a is used to set which of a staggered stitch and a straight stitch to start sewing when forming a stitch pattern on a sewn body according to claims 1 to 5, or a staggered stitch having a predetermined width. This corresponds to a sewing start setting means for setting which of a stitch and a staggered stitch having a small width is to be started.
A stitch number setting switch for setting the number of stitches forming a straight stitch when the start of the straight stitch is set by the stitch start setting means. It corresponds to. As will be described later, when the straight stitch portion in the configuration of the cross stitch pattern is a staggered stitch having a first swing amount smaller than a predetermined width,
This corresponds to a stitch number setting unit that sets the number of stitches forming a staggered stitch having a small width. The staggered part number setting switch 11e corresponds to the staggered stitch number setting means for setting the number of stitches of the sewing needle within a predetermined width in the swinging direction. The step-back switch 19A interlocked with the pedal 19 resets the sewing position in the predetermined sewing order while forming the stitch pattern and returns the sewing position to the head of the predetermined sewing order. It corresponds to reset means.

As described in detail above, in the zigzag stitch sewing machine 1 according to the present embodiment, the sewing start selection switch 11a,
By operating the setting switches of the straight section stitch number setting switch 11b, the stitch width setting switch 11c, the straight section stitch number setting switch 11d, and the staggered point number setting switch 11e, the stitching stitch and the straight stitch are operated. When storing stitch data such as a cross stitch pattern that alternately repeats stitches in the stitch table 42, setting of the pattern at the start of sewing, setting of the number of stitches when the sewing start is a straight stitch pattern, and setting of the staggered stitch pattern The setting of the number of sewing needles can be switched and stored. Therefore, it is possible to selectively switch the movement control of the needle bar 4 by driving the stepping motor 22 based on the position data stored in each data order of the stitch table 42. Thus, for example, when using the seam stitch pattern as a design pattern, the start of sewing can be selected as either a straight stitch or a staggered stitch by switching the sewing start selection switch 11a. It can be sewn in good design.

When the sewing is started from a straight stitch, the number of stitches at the start of sewing can be set by the stitch start linear portion stitch number setting switch 11b, so that the appearance can be further improved. In addition, the stitch width of the staggered stitch is adjusted by the stitch width setting switch 11c, the number of stitches of the linear portion is changed by the straight portion stitch number setting switch 11d, and the staggered portion is set by the staggered portion number setting switch 11e. The number of stitches can be changed, and these functions also contribute to the improvement of design appearance. Further, by switching the sewing start to the straight stitch, it is possible to prevent the thread from coming off due to the horizontal swing of the needle at the staggered stitch, and it is also possible to improve the stitching strength by making the staggered portion a multi-point stitch. As a result,
It is possible to flexibly respond to various sewing processes and sewing specifications of the user.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various improvements and modifications can be made without departing from the gist of the present invention. For example,
In the above embodiment, the bark stitches are formed by repeating the linear stitches and the staggered stitches. However, as shown in FIG. 9, the staggered stitches having the first swing amount smaller than the predetermined width are repeated a predetermined number of times. After that, a staggered stitch of a second swing amount having a predetermined width is inserted. By repeating this alternately, a knitting pattern is formed. When this pattern is used, when a stretchable cloth is sewn together, the seam can be expanded and contracted in accordance with the stretchability of the cloth, which is convenient. Also,
The appearance of the design also improves.

[0064]

As described above, in the staggered sewing machine according to the first aspect, a staggered stitch having a predetermined width and a straight stitch having a predetermined number of stitches are swung by an actuator in a direction orthogonal to the conveying direction of the workpiece. The eyes and the eyes are alternately repeated according to the sewing order set by the sewing start setting means, so that the user does not need to manually turn the pulley of the sewing machine to advance the sewing order before starting sewing. Stitches can be set easily and stably. Therefore, when a pattern that alternately repeats a staggered stitch and a straight stitch having a predetermined number of stitches is used as a design pattern, it is possible to always start sewing from the straight stitch by setting the sewing start. Therefore, it is possible to obtain a good finish even when performing a plurality of design stitches, and it is possible to flexibly respond to various sewing processes and use requirements such as sewing specifications.

In the staggered sewing machine according to the second aspect, when sewing is started from the straight stitch by the sewing start setting means, the number of stitches forming the straight stitch pattern is set by the stitch number setting means.
Thereby, in addition to the effect of the staggered sewing machine described in claim 1, the appearance can be further pursued by finely adjusting the stitches at the start of sewing, which is preferable in design. In addition, when the stitch start is a staggered stitch and the needle moves in the width direction so much that the first stitch comes off, only one stitch at the start of the stitch can be used as a straight stitch. In addition, it is possible to achieve a thread pull-out preventing effect while maintaining the design in which the stitches are staggered at the start.

In the staggered sewing machine according to the third aspect, the staggered stitch having a predetermined width and the predetermined number of stitches having a width smaller than the predetermined width are swung by the actuator in a direction perpendicular to the conveying direction of the sewing object. The staggered stitch is alternately repeated according to the set sewing order based on the sewing start setting means, so that when the stretchable cloth is sewn, the stitch can be expanded and contracted in accordance with the elasticity of the cloth. It is convenient. In addition, there is no need for the user to manually turn the pulley of the sewing machine to advance the sewing order before starting sewing, thereby making it possible to easily and stably set a stitch at the start of sewing. . Therefore, when used as a design pattern,
In addition to the seam pattern design, it is possible to always start sewing from a zigzag stitch whose width is smaller than the specified width by setting the sewing start, so that a good finish is achieved even when multiple design stitches are applied from the same starting point It is possible to flexibly respond to various sewing processes and usage requirements such as sewing specifications.

In the staggered sewing machine according to the fourth aspect, when sewing is started from a staggered stitch having a width smaller than a predetermined width by the sewing start setting means, a staggered stitch pattern having a width smaller than the predetermined width is formed by the stitch number setting means. Set the number of stitches to be formed. Thus, in addition to the effect of the staggered sewing machine according to claim 3, the appearance can be further pursued by finely adjusting the stitches at the start of sewing, which is preferable in design. In addition, when the sewing start is a staggered stitch having a predetermined width and the amount of movement of the needle in the width direction is large and the first stitch is pulled out, only one stitch at the start of sewing is reduced to a width smaller than the predetermined width. The staggered stitches can also be used, and the effect of preventing thread pull-out can be achieved while keeping the design in which the stitches start at staggered stitches of a predetermined width.

Further, in the staggered sewing machine according to the fifth aspect, the sewing position in the predetermined sewing order set by the sewing start setting means during the formation of the stitch pattern is reset by the sewing order resetting means. Return the sewing position to the beginning. Thereby, in addition to the effect of the staggered sewing machine according to any one of claims 1 to 4, when the sewing body is newly replaced and the sewing is started, the sewing position is reset and the sewing position is set at the head of the predetermined sewing order. It can be returned and the stitch at the start of sewing can always be the same.

Further, in the staggered sewing machine according to the sixth aspect, the number of stitches to be sewn by the sewing needle is set by the staggered stitch number setting means until the sewing needle reaches a predetermined width orthogonal to the conveying direction of the sewing object. . Thus, in addition to the effect of the staggered sewing machine according to any one of claims 1 to 5, a so-called 2
The zigzag stitching is performed by multi-point zigzag such as dot zigzag, three-point zigzag, etc., so that the design appearance of the zigzag stitch pattern can be improved and the stitching strength can be improved.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a staggered sewing machine.

FIG. 2 is a perspective view of a main part of the staggered sewing machine.

FIG. 3 is a block diagram of a staggered sewing machine.

FIG. 4 is a flowchart of creating a stitch table.

FIG. 5 is a flowchart of writing staggered portion data in creating a stitch table.

FIG. 6 is an explanatory diagram schematically showing a stitch table.

7 is an explanatory diagram showing a sewing pattern sewn based on stitch data stored in a stitch table of FIG. 5;

FIG. 8 is a flowchart of a drive control program for a stepping motor.

FIG. 9 shows a staggered stitch having a first swing amount smaller than a predetermined width;
It is a mimetic diagram showing a cross stitch pattern having a staggered stitch of a second swing amount having a predetermined width.

[Explanation of symbols]

 1 Staggered sewing machine 4 Needle bar 11a Sewing start pattern selection switch 11b Sewing start straight stitch number setting switch 11c Stitch width setting switch 11d Linear stitch number setting switch 11e Staggered stitch number setting switch 16 Sewing needle 22 Stepping motor 41 RAM 42 Sewing Eye table 43 ROM 44 CPU

Claims (6)

[Claims] 1. A staggered stitch having a predetermined width on a sewn object while the sewn object is conveyed in a predetermined conveying direction and a sewing needle is swung by an actuator in a swing direction orthogonal to the conveying direction of the sewn object. A staggered sewing machine that forms a stitch pattern that alternately repeats a linear stitch with a predetermined number of stitches.When forming a stitch pattern on the body to be sewn, either of the staggered stitch and the linear stitch is used. A staggered sewing machine comprising sewing start setting means for setting whether to start sewing. 2. A stitch number setting means for setting the number of stitches forming a straight stitch when the sewing start setting means sets a start of a straight stitch. The staggered sewing machine according to 1. 3. A staggered stitch having a predetermined width on the sewn object while the sewn object is conveyed in a predetermined conveying direction and the sewing needle is swung by an actuator in a swing direction orthogonal to the conveying direction of the sewn object. And a zigzag stitch sewing machine that forms a stitch pattern that alternately repeats a staggered stitch with a predetermined number of stitches having a width smaller than the predetermined width, wherein a stitch pattern is formed on the body to be sewn. A staggered sewing machine comprising stitching start setting means for setting which of a staggered stitch and a staggered stitch of a small width to start sewing. 4. A stitch number setting means for setting the number of stitches forming a staggered stitch having a small width when a staggered stitch having a small width is set by the sewing start setting means. The staggered sewing machine according to claim 3. 5. While the stitch pattern is being formed in accordance with the predetermined sewing order set by the sewing start setting means, the sewing position in the predetermined sewing order is reset and the sewing position is returned to the head of the predetermined sewing order. The staggered sewing machine according to any one of claims 1 to 4, further comprising a sewing order reset unit. 6. The staggered sewing machine according to claim 1, further comprising a staggered stitch number setting means for setting the number of stitches within a predetermined width in the swing direction.