JPS6055990A - Multi-pattern sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a multi-pattern sewing machine that automatically forms a desired pattern selected from a large number of predetermined patterns. The present invention relates to a technique for displaying actual dimensions in a direction.

Prior Art In multi-pattern sewing machines that automatically form a desired pattern selected from pre-stored patterns, the number of types of patterns that can be sewn has recently been expanded to, for example, more than 100 types. A number of pattern figures are displayed on the front of the sewing machine. However, because the display area on the front of the sewing machine for displaying the pattern images is limited, the size of the pattern images displayed on the front of the sewing machine has increased as the number of types of patterns that can be sewn increases. There is a tendency to make the pattern smaller and smaller than its actual size. For this reason, in such conventional multi-pattern sewing machines, it is difficult to predict the dimensions of the pattern actually formed on the workpiece cloth from the shape displayed on the front of the sewing machine and set the sewing position. When forming a desired pattern in a limited area on a processed cloth in order to form a pattern, there is an inconvenience that the pattern protrudes from the area where the pattern should be formed or the pattern is unevenly distributed within the area. .

On the other hand, it may be possible to check the actual dimensions in the workpiece cloth feed direction by performing trial sewing of the pattern to be formed prior to actual sewing, but it is not necessary to perform such trial sewing each time the pattern is formed. This means that workers are forced to perform extremely troublesome work.

Purpose of the Invention The present invention has been made against the background of the above circumstances,
The object is to provide a multi-pattern sewing machine that can display the actual dimensions of a desired pattern selected from a large number of patterns in the workpiece cloth feeding direction.

Structure of the Invention In order to achieve the above object, the gist of the present invention is to provide a pattern selection device for selecting a desired pattern from a large number of predetermined patterns, and to be capable of lateral rocking movement. In a sewing machine that forms a selected pattern by means of a sewing pin and a feed dog (J), the sewing machine includes: ■ a storage device that stores pattern length data regarding the length in the feed direction of each pattern among the plurality of patterns; (1) continuous means for reading out pattern length data corresponding to the selected pattern from the storage device; and a display device disposed in the frame. ゛Advantageous Effects of the Invention With this arrangement, when a desired pattern is selected by the pattern selection device, the successive means can respond to that pattern. The pattern length data is read from the storage device, and the length of the desired pattern in the work cloth feeding direction selected according to the read pattern length data is displayed on the display device. Before sewing the selected pattern, the length of the selected pattern in the feed direction can be read from the display device, eliminating the need for trial sewing (you can know the actual dimensions of the selected pattern and can easily process the pattern). It becomes possible to accurately set the sewing position on the cloth, in other words, to set the sewing start position.

Therefore, when forming a selected desired pattern on the work cloth, it is possible to prevent the pattern from protruding from the area on the work cloth where the pattern is to be formed, or from being uneven within that area.

Embodiment FIG. 1 shows the external appearance of a multi-pattern sewing machine to which the present invention is applied. A pillar part 12 is erected on a bed part 10, and an arm part 14 is connected to the pillar part 12 at one end thereof.
It is supported horizontally by A head 16 is formed at the other end of the arm 14, and a sewing needle 18 is provided at the lower end of the head 16 and is driven reciprocally in the vertical direction in synchronization with the rotation of a sewing machine main shaft (not shown). Needle bar 20 and manual F”J
A presser foot 22 is provided which can be moved to a raised position and a lowered position by operation. -force, to, 71
A feed dog 24 is provided near the needle drop point of the sewing needle 18 on the section 10. The feed dog 24 feeds the work cloth by being reciprocally driven in synchronization with the rotation of the main shaft of the sewing machine.

On the pattern display section 26 provided on the front side of the arm section 14, a large number of patterns (approximately 1011 types) consisting of groups A, B, and C are displayed together with two-finger pattern numbers in figures smaller than their actual dimensions. ing. Patterns belonging to Group B are so-called continuous sewing patterns including practical stitches such as straight stitches and decorative patterns, and patterns belonging to Group 8 are Alpha Bent,
Characters such as numbers and patterns belonging to group C are a series of patterns or characters. The patterns belonging to groups A, B, and C are so-called cycle patterns in which each pattern is sewn individually. Below the pattern display section 26, ten pattern selection switches 28 each having a number engraved thereon are arranged to select a desired pattern. Also, on the right side of the pattern display section 26, there is displayed a ``pattern number'' or ``number'' of the pattern in the workpiece cloth feeding direction.
A two-finger numeric display 30, which is a character display for displaying actual dimensions, and a display changeover switch 32, which is a manual operation device for displaying/changing the dimensions of the pattern, are provided on the numeric display 3o. ing. Note that 34 is a start/stop switch for starting and stopping the sewing machine, and 36 is a speed setting device for setting the speed of the sewing machine motor 38 to a desired value.

The multi-pattern stitch sewing machine constructed as described above is equipped with a control circuit shown in FIG. That is, when a two-finger pattern number corresponding to a desired pattern is input to the encoder 4° in accordance with the operation of the pattern selection switch 28, the encoder 40 converts it into pattern number data SM, which is a code signal representing the pattern number. - pattern number data SM is in the starting address memory 42. Capo 7+-L of multiplexer 44, address memory 46 and pattern discrimination circuit 48
are supplied to each. In other words, the pattern selection switch 2
8 and encoder 4o form a pattern selection device that generates pattern number data SM.

The start address memory 42 stores a large number of start addresses. a, the leading address corresponding to the pattern number represented by the input pattern number data SM is supplied to the stitch data generation device 50, and the stitch data generation device 50 generates the pattern corresponding to the pattern number data SM. Generates a series of stitch data for configuration.

A timing signal TS synchronized with the rotation of the sewing machine main shaft (not shown) is supplied to the stitch data generator 5o from a timing signal generator 52, and the stitch data generator 5o generates pattern number data SM in synchronization with the timing signal TS. A series of stitch data for forming a pattern corresponding to the pattern is sequentially supplied to the actuator drive circuit 54. Of course, the stitch data generating device 50 is loaded with the first address from the first address memory 46 at the same time as a pattern selection operation, and also receives a timing signal in addition to the loaded content.
An address counter that counts the number TS by 4, a stitch data memory that stores various types of stitch data in advance, and sequentially outputs stitch data that has been marked ``J'' or ``J'' according to the content of the δ1 number of the address counter, etc. -ing

Each stitch data is composed of a pair of old position signals 31 (and a feed signal SF, and the needle position signals':
sn represents the swinging position of the sewing needle 8, and feed data SF represents the amount and direction of feed of the work cloth. The actuator drive circuit 54 converts the needle position signal S [(and the feed signal SF) into an analog signal, amplifies the power, and supplies the amplified power to the needle swing actuator 56 and the feed actuator 58. The swinging position of the needle bar 20 is moved by driving the swinging mechanism, and the feed actuator 58 adjusts the workpiece cloth feed amount and feed by the feed dog 24 by positioning the rotational position of a feed adjuster (not shown). It changes direction.

The above memory 4G stores an address specifying each pattern length data SL stored in the length data memory 60, and if the pattern number data SM represents a cycle pattern, the pattern is Each time a corresponding address signal is supplied to the length data memory 60, pattern length data SL representing the actual dimension in the work cloth feeding direction of the pattern corresponding to the pattern number data SM is transferred from the length data memory 60 to the multiplexer 44. It is supplied to the input capo-1-11. That is, the length data memory 6o is a storage means for storing the pattern length data SL, and the address memory 46 is used to store the pattern length data SL. This forms continuous output means for reading out the pattern length data SL every time the address-input means is turned on.

The multiplexer 44 allows the pattern number data SM to pass through the multiplexer 44 to the display drive circuit 62 by selecting the person's capo H1 at that time, but when the switching signal 5S (H level ) is supplied, the input port H is selected so that the pattern length data SL is supplied to the display drive circuit 62. The display drive circuit 62 causes the numerical display 30 to numerically display the pattern number represented by the pattern number data SM or the length represented by the pattern length data SL supplied thereto.

Note that this display drive circuit 62 has a blanking signal ν4.
+3+, u+leher) is supplied, the numeric display 30
It has a function to stop the display.

In the pattern discrimination circuit 48, the pattern number data SM
It is determined whether the pattern corresponding to the pattern belongs to the cycle pattern (single sewing pattern) of group A or C of the pattern, or to the continuous sewing pattern of group B, and if it belongs to the cycle pattern, it becomes H level. If the pattern belongs to a continuous sewing pattern, a discrimination signal SJ of level 7 is supplied to the inverter 64 and the motor control circuit 66. Also,
The pattern discrimination circuit 48 stores the number of stitches for each pattern belonging to the cycle pattern, and the pattern number data SM
When the pattern number represented by is a cycle pattern, a stitch number signal SN representing the total number of stitches is supplied to the motor control circuit 66. The inverter 64 converts the signal level of the input signal, inverts the level of the discrimination signal SJ, and supplies it to the AND circuit 68. The switching signal 5S (L level) from the display switching switch 32 is also supplied to the AND circuit 68, and when the signals supplied to the AND circuit 68 are each 14 levels, the blanking signal BL is output.
is supplied to the display drive circuit 62. Therefore, if the pattern corresponding to the pattern number data SM belongs to the continuous sewing pattern, 1. The level discrimination signal SJ is the pattern discrimination circuit 4
8, numeric display on the display 30 is inhibited while the switching signal SS is being output by pressing the display switching switch 32.

The motor control circuit 66 includes, for example, a T-type free-seven-blow flow circuit that alternately generates and extinguishes the starting signal SK in accordance with the pressing operation of the starting/stopping switch 34;
When the discrimination signal SJ is at H level, in other words, when a pattern belonging to the cycle pattern is selected by the pattern selection switch 28, the stitch number represented by the stitch number signal SN is loaded and the number content is zero. A subtraction counter for resetting the flip-flop circuit is provided, and when the start signal SK is output to the monitor drive circuit 70, a timing signal is generated in synchronization with the rotation of the sewing machine main shaft driven by the sewing machine motor 38. The old enemy contents of the subtraction counter are subtracted. Then, when the counter contents reach a predetermined constant value, a low speed command signal S'F is output to the motor drive circuit 70. Next, when the count reaches zero and a raised position signal SU indicating that the flywheel position is in the raised position is supplied from the pulling position detector 72, the output of the start signal SK to the motor drive circuit 70 is performed. make it stop.

In the motor drive circuit 70, while the start signal SK is being supplied, the actual speed of the sewing machine motor 38 supplied from the speed detector 74 is not displayed, but the command speed supplied from the speed setting device 36 is displayed. Electric power is supplied to the sewing machine motor 38 so that the signals coincide with each other, and the sewing machine motor 38 is driven at the speed set by the speed setting device 36. In addition, while the low speed command signal ST is being supplied in addition to the start signal SK, electric power is supplied to drive the sewing machine motor 38 at a predetermined low rotational speed, so that the sewing machine motor 38 is made to have a low speed. On the other hand, in a state where the supply of starting signal SK is stopped, the power supply to the sewing machine motor 38 is stopped and the sewing machine motor 38 is stopped. Therefore, when a pattern belonging to the above-mentioned cycle pattern is selected by the pattern selection process 28, the sewing machine motor 38 is driven at a low speed for a certain period of time before the sewing of that pattern is completed, and The sewing machine motor 38 is automatically stopped when the sewing needle 18 reaches the raised position when the sewing is completed.

The operation of this embodiment will be explained below.

When a continuous sewing pattern belonging to group B is selected by operating the pattern selection switch 28, the pattern number data SM is supplied to the display drive circuit 62 through the multiplexer 44, so that the number display 30 displays the selected pattern. The pattern number of the selected pattern will be displayed. At this time, even if the display 9J change switch 32 is pressed and the input port L of the full-chip precooler 44 is switched to the large capo Ml, the L level discrimination signal SJ output from the pattern discrimination circuit 48 is sent to the inverter 64. It is inverted and set to H level and supplied to the AND circuit 68, and also to the AND circuit !8
Since the II level switching signal SS is supplied to 6B from the display switching switch y~32, the blanking signal 31 is supplied from the ant'' circuit 68 to the display drive circuit 62, and the numeric display 32 is Nothing is displayed.This prevents the pattern number displayed on the number display 30 from being mistaken as the size of the pattern.

When the start/stop switch 34 is pressed in the above state, the start signal SK is supplied from the morph control circuit 6 to the motor drive circuit 70, so that the sewing machine motor 38
is driven at a speed set by a speed setting device 36, and the driving of this sewing machine motor 38 is controlled by a start/stop switch 34.
continues until pressed again. At this time, the stitch data consisting of the first position signal SH and the feed signal SF is sequentially supplied from the stitch data generator 50 to the actuator drive circuit 54 in synchronization with the timing signal 'FS, so that a continuous sewing pattern is created on the workpiece cloth. It is formed continuously.

Next, when the pattern selection switch 28 is operated to select the Z+cycle pattern that falls under the pattern groups A or 4 to C, the numeric display 32 displays two numbers in the same way as when the continuous sewing pattern is selected. The finger pattern number is displayed. At this time, if the operator wants to know the actual N method of the selected cycle pattern in advance of the selected cycle pattern, the operator presses the display changeover switch 32. For this purpose, a switching signal SS is supplied to multiplexer 44 to
)L is switched to the input port H, so pattern length data SL representing the length in the work cloth feeding direction of the pattern corresponding to the pattern number data SM is supplied to the display drive circuit 62 through the multiplexer 44. The actual dimensions in the work cloth feed direction are displayed on the numerical display 30. Therefore, the operator can know the actual method of forming the pattern on the work cloth according to the dimensions displayed on the numerical display 30, and can easily set the sewing position of the pattern. can.

When the start/stop switch 34 is suppressed in the above state, the start signal SK is supplied from the morph control circuit 66 to the motor drive circuit 70, so that the sewing machine motor 38 is driven to rotate at the speed set by the speed setting device 36. Then, a selected desired stitch pattern (cycle pattern) is sewn onto the work cloth according to the same operation as when a continuous pattern is formed. At this time, when the number of stitches of the cycle pattern reaches a predetermined constant number LJ smaller than the total number of stitches, a low speed command signal ST is supplied from the morph control circuit 66 to the motor drive circuit 70. Therefore, the sewing machine motor 38 is driven to rotate at a low speed before it stops.

Next, when the number of stitches of the cycle pattern reaches the total number of stitches and the rising position signal SU is supplied from the position detector 72, the motor drive circuit 70 is output from the morph control circuit 66.
The starting signal SK that was being supplied to the machine is stopped, and the sewing machine motor 38 is stopped at the position where the sewing needle 18 is raised.

Of course, when sewing a cycle pattern, the sewing machine motor 38 is reliably automatically stopped with the stitch I8 raised when the sewing is completed.

In this way, according to the present embodiment, when a cycle pattern is selected by the pattern selection switch 28, the actual modulus of the work cloth feeding direction of the selected cycle pattern is determined by pressing the display changeover switch 32. Since the information is displayed on the display 30, it is extremely easy to set the sewing position on the workpiece cloth with the cycle pattern to be sewn. Of course, in a multi-pattern sewing machine that can sew many types of patterns, the many types of patterns are displayed on the pattern display section 26 on the front of the sewing machine. Since the area is limited, it is inevitable that each pattern image will be displayed smaller than its actual size. For this reason, the operator cannot accurately know the actual dimensions of each pattern from the size of the pattern displayed on the pattern display section 26, and the sewing position of the pattern on the workpiece cloth. This makes it difficult to set the pattern, and in some cases, the pattern may protrude from the area on the fabric where the pattern is to be formed, or the pattern formed within that area may be uneven. However, according to this embodiment, prior to sewing,
Addition of cycle pattern] Since the actual dimensions in the cloth feeding direction are displayed on the display 30, the operator can grasp them, making it much easier to set the stitching position of the pattern on the workpiece cloth. It is possible to form a cycle pattern in a well-balanced manner within the area on which the pattern is to be formed on the cloth without the need for trial sewing.

Next, another embodiment of the present invention will be described.

1) In the embodiment described in 11, the actual length of the selected cycle pattern is displayed optically on the numerical display 30, but in this embodiment, the actual length is displayed audibly. be. In the following description, the same reference numerals are used to denote the same parts as in the above-mentioned embodiments, and the description thereof will be omitted.

In FIG. 3, pattern length data SL output from length data memory 60 is supplied to speech synthesis circuit 80. In FIG.

In the voice synthesis circuit 80, a series of signals necessary for synthesizing a voice signal for audibly displaying each length of the cycle pattern in the workpiece cloth feeding direction is stored, and the voice generation circuit 80 is used as a manual operating body. When the utterance command signal SO is supplied by pressing the switch 82, the pattern length data SL and force from the length data memory 60 are stored, and the pattern length data SL is changed according to the contents of the pattern length data SL. A voice message SV for voice displaying the actual dimensions is synthesized. Then, the audio signal S is supplied to the speaker 86 through the amplifier 84, so that the actual length of the cycle pattern selected by the pattern selection switch 1'1 of the pattern selection switch 28 in the work cloth feeding direction is heard from the speaker 86. Is displayed. Although the speaker 86 is generally installed in the frame of the sewing machine shown in FIG. The sewing machine frame does not refer to the machine frame that directly constitutes the sewing machine shown in FIG. 1, but includes the above-mentioned frame and members.

In this way, according to this embodiment, the pattern selection switch 28
When the cycle pattern is displayed according to the operation, if the operator presses the sound generation switch 82 before sewing the pattern, a pattern representing the actual dimensions in the work cloth feeding direction of the cycle pattern represented by the pattern number data SM is displayed. Since the length data sr- is not displayed and the audio signal SV for audibly displaying the actual method is synthesized and supplied to the speaker 86 through the amplifier 84, the operator can make his/her own selection prior to sewing. The actual q-method of the cycle pattern in the work cloth feeding direction can be known by the sound from the speaker 86. Note that the sound generation switch 82 of this embodiment may be provided at the same position as the display changeover switch 32 described above on the front of the sewing machine. A sound generation switch 82 and a display changeover switch 32 are arranged side by side on the front of the sewing machine.

Although the embodiment of the present invention has been described above based on the drawings, the present invention can also be applied to other aspects.

For example, part or all of the circuit surrounded by a dashed line in the block diagram of FIG. 2 is configured by a so-called microcomputer and is an IM.

Further, the address memory 46 is used to read the pattern length data SL stored in the length data memory 6o, but the pattern number data SM output from the encoder 4o is directly sent to the length data memory 6o as an address signal.
It is also possible to supply it to In such a case, the encoder 40 forms a continuous output means.

The above-mentioned embodiments are merely examples of the present invention, and various modifications may be made to the present invention without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of a sewing machine to which an embodiment of the present invention is applied. FIG. 2 is a block diagram showing the circuit configuration of the embodiment of FIG. 1. FIG. 3 is a block diagram showing the main parts of the circuit configuration according to another embodiment of the present invention. 18: Sewing side 24: Feeding source 30: Numeric display (display device) 4 (i-near address memory (reading means)) 60: Data memory (storage device) 86: Speaker (display device) Applicant: Brother Industries, Ltd.

Claims (3)

[Claims] (1) Equipped with a pattern selection device that selects a desired pattern from among a large number of predetermined patterns, and forms the selected pattern through cooperation between a sewing needle that can swing in the horizontal direction and a feed dog. In the sewing machine, a device for storing pattern length data regarding the length in the feed direction of each pattern among the plurality of patterns; and a retrieval device for reading pattern length data corresponding to the selected pattern from the storage device. , a display device disposed on a sewing machine frame for informing an operator of the length of the selected pattern according to the read pattern length data. (2) The pattern selection device is configured to generate pattern number data representing a pattern number corresponding to the selected pattern, the selection device is configured with a character display capable of optically displaying numbers, and the selection device is configured to include a character display capable of optically displaying numbers; In order to selectively display either the pattern number or the pattern length on the character display, data supplied to the display is changed to the pattern path redata and the pattern length data according to the operation of the manual operating body on the machine frame. 2. The multi-pattern sewing machine according to claim 1, further comprising switching means for switching between. (3) The display device includes a sound generating device that operates in response to the operation of a manual operating body on the sewing machine frame in order to generate a sound representing the length of the selected pattern according to the pattern length data. A multi-pattern sewing machine according to claim 1.