JPH02161991A - Speed controller for electronic sewing machine - Google Patents

Abstract

PURPOSE:To eliminate the need for the complicated operation of a speed setting means and to improve user's operability by providing a speed commanding means to designate the rotating speed of a sewing machine at a time using an activation stop commanding means lower than the rotating speed at the time of maximum stepping to use a controller. CONSTITUTION:A speed commanding means 3 outputs speed designation information at the time of the maximum stepping of a controller 4 of 100rpm when a speed setting means 1 is in a right edge and 800rpm when it is in a left edge according to connection presence information and a set speed signal. For example, when the scale of the speed setting means 1 is set to 7, the speed command information of 700rpm are outputted. Next, when the controller 4 is not mounted to a sewing machine main body, a controller connection discriminating means 2 outputs connection absence information. The speed commanding means 3 outputs the speed designation information of 100rpm when the speed setting means 1 is in the right edge and the speed designation information of 600rpm are outputted when the means 1 is in the left edge according to the connection absence information and set speed signal.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a speed control fJrJ function using both a start/stop key provided on the sewing machine body and a controller (foot controller or finger controller) that is detachable from the sewing machine body. The present invention relates to speed setting of a speed setting means (for example, a slide volume, etc.) in a sewing machine equipped with the present invention.

(Prior Art and Problems to be Solved by the Invention) Some conventional sewing machines allow the setting speed to be adjusted by operating a speed setting means 1 (for example, a slide volume) provided on the sewing machine body. In such a sewing machine, in order to make effective use of the speed setting means l, when using the controller 4 (foot controller or finger controller), the set speed is set at the maximum pedal stroke, and when the start/stop key is used, the set speed is set at the set speed. I made the sewing machine motor rotate. However, sewing work using a sewing machine frequently involves high-speed sewing in straight-line seams and low-speed sewing in small areas such as the edge of the fabric.In particular, high-speed sewing is required to complete the seam formation at a desired position on the fabric. It was difficult. When using the controller 4, even if the speed setting of the speed setting means I is set to high-speed sewing, the desired speed can be adjusted by adjusting the amount of pressure on the controller without taking your hand off the workpiece cloth, making it easy to sew at the desired position. I was able to complete the eye formation. However, when performing sewing work on the sewing machine using the start/stop key without using the controller 4, if you perform the work with the speed setting means 1 set to high-speed sewing as when using the controller, the stitches will be sewn at the desired position. When the operator wants to finish forming, it is necessary for the operator to operate the speed setting means 1 to temporarily lower the sewing speed. Therefore, it was difficult to complete the seam formation at a desired position. Is there a method in which the operator starts the sewing work after lowering the set speed of the speed setting means l, or is there a method in which the sewing work is performed using the controller 4 and then the sewing work is continued using the start/stop key? The operation of the speed setting means 1 was troublesome. Furthermore, when performing sewing work using the start/stop key, it is necessary to manually operate the start/stop key to start and stop the sewing machine, and the work is performed with one hand removed from the workpiece cloth. Therefore, setting the sewing speed to be the same as when using the controller, which allows both hands to be used freely, has the disadvantage of giving the operator a sense of uneasiness.

(Means for Solving the Problems) The present invention has been made in view of the above problems, and it sets the sewing speed corresponding to the setting scale of the speed setting means I on the sewing machine main body when the controller 4 is attached to and detached from the sewing machine main body. Make related and different.

1. When using the controller, press the pedal to the maximum and set the speed as set by the speed setting means.

2. When using the start/stop key, compared to when using the controller, set an upper limit to the speed at higher speeds (a speed that allows seam formation to be completed at the desired position), and when the speed is below the upper limit, the set speed is maintained, and when the speed is higher than the upper limit In this case, you can automatically disable the set speed and keep it at the upper limit speed, eliminating the hassle of speed setting!
This allows sewing work to be performed smoothly without the need for manual operations.

3.Furthermore, in a sewing machine that has different sewing speed upper limit values suitable for forming the sewing pattern depending on the type of sewing pattern, the sewing speed upper limit value for the selected sewing pattern is set to the upper limit (stitch formation ends at the desired position). If the speed exceeds
Said 1.2. perform the following actions.

If the sewing machine motor does not exceed the speed set by the speed setting means I when the controller is used, the sewing machine motor is rotated at the speed set by the speed setting means I when the start/stop key is used, and the speed is controlled.

(Example) This embodiment will be explained according to the drawings.

FIG. 1 is an external view of the electronic sewing machine of the present invention, in which speed setting means 1 and pattern selection means 10 are provided on the front of the sewing machine, and start/stop command means 5 is provided on the lower left jaw of the sewing machine. Further, a detachable controller 4 is placed on the right side of the sewing machine body.

FIG. 2 is an electrical block diagram of an embodiment of claim I of the present invention, and the configuration will be explained based on the drawing.

The speed setting means 1 is a variable resistor for setting the rotational speed of the sewing machine to a desired speed, and the resistance value changes linearly by sliding the sewing machine in the left and right directions.

The controller connection determining means 2 is a means for determining whether the controller 4 is attached to or detached from the sewing machine body, and outputs information regarding the presence or absence of connection. Normally, the determination is made using a dedicated detection switch or a signal from the controller 4.

The speed command means 3 uses the set speed signal of the speed setting means 1 and the connection presence/absence information of the controller connection determination means 2 to
The speed at maximum depression is specified when the controller 4 is used, and the speed when the start/stop command means 5 is used is specified. Two types of graphs showing speed designation information corresponding to the scale of the speed setting means 1 are shown in FIGS. 4 and 5.

The controller 4 is an operating body that controls the speed to a desired speed by the amount of pedal operation, and is a variable resistor that is removably installed in the sewing machine body and whose resistance value changes in proportion to the operation in one direction. It also has a function to start and stop the stitch forming operation of the sewing machine.

The start/stop command means 5 is an automatic return type switch for starting and stopping the stitch forming operation of the sewing machine.

The microcomputer 6 activates either the controller 4 or the start/stop command means 5 based on the connection presence/absence information of the controller connection determination means 2, and determines whether the operation amount of the controller 4 or the start/stop signal of the start/stop command means 5 is activated. commands to start and stop the sewing machine are sent to the sewing machine motor drive means 7. When the controller 4 is used at the same time, the speed is determined from the speed designation information of the speed command means 3 and the signal corresponding to the operation amount of the controller 4, and the speed control information corresponding to the speed is sent to the sewing machine motor drive means 7. Output. Similarly, when the controller 4 is not used, the speed designation information of the speed command means 3 is directly converted into corresponding speed control information and output. In addition, the sewing machine main shaft (not shown) from the speed detection means 9
The speed control information is corrected based on the rotational speed signal so as to maintain the determined speed.

The sewing machine motor drive means 7 is a means for controlling the driving of the sewing machine motor 8, and operates according to instructions from the microcomputer 6.

Sewing machine motor 8 is the main sewing machine! II (not shown), the rotational speed varies in relation to the power supplied from said sewing machine motor drive means 7.

The speed detecting means 9 detects the rotational speed of the sewing machine main shaft (not shown) and outputs a rotational speed signal to the microcomputer 6.

Next, the operation will be explained. When the controller 4 is attached to the sewing machine main body, the controller connection determining means 2 outputs connection information.

The speed command means 3 follows the connection information and the set speed signal as shown in graphs (A) in FIGS. 4 and 5. When the speed setting means 1 is at the right end, the speed setting means 3 is at the right end; outputs speed designation information of 800 [rpm] at the time of maximum depression of the controller 4. For example, when the scale of the speed setting means l is set to 7, the speed is 700 [r
pm] is output. The microcomputer 6 determines whether to start or stop the operation of the sewing machine based on the connection information and a signal corresponding to a resistance value proportional to the pedal operation amount of the controller 4, and when starting operation, increases the speed to the maximum based on the speed designation information. The controller 4 outputs speed control information that generates a speed corresponding to the operation amount of the controller 4.

For example, if the operation of the controller 4 is set to 1/2 of the maximum depression position, speed control information of 350 rpm, which is 1/2 of the speed designation information of 700 rpm, is output.

The sewing machine motor driving means 7 supplies the sewing machine motor 8 with electric power corresponding to a rotational speed of 350 rpm of the sewing machine main shaft (not shown) in accordance with the speed control information. Furthermore, the microcomputer 6 controls the sewing machine main shaft (
Based on the rotational speed signal (not shown), the speed control information is corrected to 350 rpm.

Next, if the controller 4 is not attached to the sewing machine main body, the controller connection determining means 2 outputs the no-connection information.

The speed command means 3 follows the no-connection information and the set speed signal as shown in the graphs (B) of FIGS. 4 and 5, when the speed setting means 1 is at the right end, it is l 00 [rpm; when it is at the left end, it is l 00 [rpm]. 600 [Output rpml speed specification information.

For example, when the scale of the speed setting means 1 is set to 7, the speed specification information of 600 [rpm] is output in the graph characteristic shown in FIG.
Outputs ml speed specification information.

The microcomputer 6 determines whether to start or stop the operation of the sewing machine based on the no-connection information and the start/stop signal from the start/stop command means 5, and also provides speed control information for generating a speed corresponding to the speed from the speed designation information when starting the operation. Output. For example, the speed control information of 600 [rl)m] is output in the graph characteristic shown in FIG. 4, and about 530 [rl) m] in the graph characteristic shown in FIG.

The following operations are the same as when using a controller.

Flowcharts regarding the setting of speed control information are shown in FIG. 6 (corresponding to the graph characteristics in FIG. 4) and FIG. 7 (corresponding to the graph characteristics in FIG. 5).

The flow chart diagram in FIG. 6 will be explained.

If the controller is installed, it sets the speed designation information corresponding to the set speed signal using the controller (
(See Figure 4(A)).

Next, speed control information is set from the ratio of speed designation information and controller operation amount. If NO, the start/stop command means is used and the signal of the setting speed means is 6 or more, or if Yes, the speed designation information is set to 600 [rl)m]. Set speed control information corresponding to speed specification information. If the set speed signal is not 6 or more, speed designation information corresponding to the set speed signal is set using the start/stop command means (see FIG. 4(B)).

Set speed control information corresponding to the set speed designation information.

Next, the flowchart shown in FIG. 7 will be explained.

If the controller is installed, it sets the speed designation information corresponding to the set speed signal using the controller (
(See Figure 5(A)). Speed control information is set from the ratio of the set speed designation information and the amount of operation of the controller. N
If o, speed designation information corresponding to the set speed signal using the start/stop command means is set (see FIG. 5(B)).

Set speed control information corresponding to the set speed designation information.

FIG. 3 is an electrical block diagram of an embodiment of claim 2 of the present invention, and is a case of a sewing machine that has different sewing speed upper limit values suitable for forming sewing patterns depending on the type of sewing pattern. Based on this, blocks different from those in FIG. 2 will be explained.

The pattern selection means 10 is provided with a plurality of automatic return type switches for manually selecting a desired sewing pattern from a large number of sewing patterns. Outputs pattern information of the pattern selected by the operation.

The sewing data generating means 11 stores sewing data including needle amplitude control data and cloth feed control data for forming stitches of the sewing pattern.

Upper shaft timing signal detection means 12 detects the rotational phase of the sewing machine main shaft (not shown) and outputs amplitude phase information and feed phase information. Usually detected using a light sensor and a shielding plate.

The pattern forming means 13 is composed of an amplitude actuator (not shown) that controls the amount of swing of the sewing needle in the amplitude direction, and a feed actuator (not shown) that controls the amount of feed of the work cloth in the back and forth direction, each of which has the above-mentioned amplitude phase. Stitch formation is performed by driving based on the information and the feed phase information.

The speed command means 3 uses the controller 4 based on the pattern information of the selected pattern from the pattern selection means 10, the setting speed signal of the speed setting means 1, and the connection presence/absence signal of the controller connection determination means 2. In this case, the speed at the maximum depression is specified, and the speed at the time when the start/stop command means 5 is used is specified.

Furthermore, the upper limit value of the sewing speed is different depending on the type of the selected pattern, which is suitable for forming the sewing pattern.

A graph showing speed designation information corresponding to the scale of the speed setting means 1 is shown in FIG. In FIG. 8, graphs (A) and (C) show characteristics that differ depending on the type of pattern.

Regarding the speed control of the sewing machine, the microcomputer 6 enables either the controller 4 or the start/stop command means 5 based on the connection presence/absence information of the controller connection determination means 2, and determines the operating amount of the controller 4 or the start/stop command. From the start/stop signal of the means 5, commands for starting and stopping the operation of the sewing machine are output to the sewing machine motor driving means 7.

When the controller 4 is used at the same time, the speed is determined from the speed designation information of the speed command means 3 and the signal corresponding to the operation amount of the controller 4, and the speed control information corresponding to the speed is sent to the sewing machine motor drive means 7. Output. Similarly, when the controller 4 is not used, the speed designation information of the speed command means 3 is directly converted into corresponding speed control information and output. Further, the speed control information is corrected based on the rotational speed signal of the sewing machine main shaft (not shown) from the speed detecting means 9 so as to maintain the determined speed.

Furthermore, regarding the formation of a sewing pattern, the sewing data corresponding to the pattern information of the pattern selected by the pattern selection means 10 is read from the sewing data generation means 11 every time one stitch is formed, and the upper axis timing signal is detected. Based on the phase information of the means 12, the pattern forming means 13 is driven to form stitches on the work cloth.

Next, the operation will be explained. When the pattern selection means 10 selects a pattern whose sewing speed upper limit value is in the group of high-speed sewing patterns,
The speed command means 3 follows the high-speed sewing pattern information, and the graph (A) in FIG. 8, which has the same graph characteristics as the previous FIG. (B) operates at the sewing machine motor speed of the start/stop command means for the high-speed sewing pattern group. For example, when the scale of the speed setting means I is set to 7, if the controller 4 is attached to the sewing machine body, the scale is 700.
It outputs speed designation information of [rpm], and if it is not installed, it outputs speed designation information of 600 [rpm] (regular speed).

In addition, when the sewing speed upper limit value selects a pattern from the low-speed sewing pattern group, the speed command means 3 selects the eighth sewing speed according to the low-speed sewing pattern information.
Graph (C) in the figure shows that the sewing machine operates at the maximum controller depression state for the low-speed sewing pattern group or at the sewing machine motor speed using the start/stop command means. For example, the scale of the speed setting means l is set to 7.
When set to , speed designation information of about 440 [rpm] is output regardless of whether the controller 4 is attached to the sewing machine body or not. When the scale is set to 8, speed designation information of 500 [rpm] is output.

Next, the flowchart shown in FIG. 9 will be explained. If the low-speed sewing pattern is NO, the selected pattern becomes the high-speed sewing pattern mode, which is the same as the explanation of FIG. 6, so the explanation will be omitted. Yes
In this case, the machine enters the low-speed sewing pattern sewing mode and sets the speed designation information corresponding to the set speed signal (see FIG. 8(C)).

Next, it is determined whether the controller is attached, and if Yes, the speed control information is set based on the speed designation information and the ratio of controller operation 1. If NO, the start/stop command means mode is entered and speed control information corresponding to the set speed designation information is set.

The microcomputer 6 inputs pattern information from the pattern selection means 10 and reads sewing data for the first stitch of the pattern from the sewing data generation means 11. The control of the sewing machine motor 8 is the same as the operation shown in FIG. 2 described above, so a description thereof will be omitted. Every time the sewing machine motor starts operating, the sewing data is read from the sewing data generating means 11 every time the sewing machine motor starts operating, and the amplitude actuator of the pattern forming means 13 is actuated based on the amplitude phase information of the upper shaft timing signal detecting means 12. (
Based on the feed phase information, a feed actuator (not shown) is driven to sequentially form stitches on the work cloth.

(Effects of the Invention) As described above, according to the present invention, in a sewing machine equipped with a speed control function using both a start/stop key provided on the sewing machine body and a controller that is detachable from the sewing machine body, the speed increases when the start/stop key is used. By setting an upper limit on the speed (speed at which seam formation can be completed at the desired position), below the upper limit, the set speed will be followed, and above the upper limit, the set speed will be automatically invalidated and the speed will reach the limit. It has become possible to provide an easy-to-use sewing machine that does not require the operation of a troublesome speed setting means.

In addition, even for sewing machines that have different upper limit sewing speeds that suit the formation of sewing patterns depending on the type of sewing pattern, if the sewing speed is below the upper limit, the set speed will be applied, and if it is above the upper limit, the set speed will be automatically invalidated and the sewing speed will be set to the upper limit. By doing so, you can now perform sewing tasks smoothly without having to perform cumbersome speed setting operations.

[Brief explanation of the drawing]

FIG. 1 is an external view of an electronic sewing machine according to the present invention, FIG. 2 is an electrical block diagram of an embodiment of claim 1 of the present invention, and FIG. 3 is an electrical block diagram of an embodiment of claim 2 of the present invention. , FIG. 4 and FIG. 5 are examples of graphs showing speed designation information corresponding to the scale of the speed setting means 1 of the present invention (corresponding to FIG. 2), and FIG. 6 corresponds to the graph characteristics of FIG. 4. FIG. 7 is a flowchart regarding the setting of speed control information corresponding to the graph characteristics of FIG. 5, and FIG. 8 is a flowchart regarding the setting of speed control information corresponding to the graph characteristics of FIG. Examples of graphs showing information (corresponding to Figure 3),
FIG. 9 is a flowchart regarding the setting of speed control information corresponding to the graph characteristics shown in FIG. Patent applicant: Janome Sewing Machine Industry Co., Ltd. Figure 4: Fast-reel setting:! - Beast's scale diagram Speed setting means scale

Claims (2)

[Claims] (1) Sewing machine motor drive means 7 for driving the sewing machine motor operatively connected to the sewing machine main shaft, speed setting means 1 for setting the rotational speed of the sewing machine to a desired speed by an external operation provided on the sewing machine body, and the sewing machine body A controller 4 is detachably installed in the sewing machine and is normally released by elastic force, and outputs a signal corresponding to the amount of operation in proportion to the operation in one direction, and a controller 4 is installed in the sewing machine body to start and stop the stitch forming operation of the sewing machine. In an electronic sewing machine, the electronic sewing machine has a start/stop command means 5 that performs start/stop commands, and a controller connection determination means 2 that determines whether the controller is attached to or detached from the sewing machine body. Based on the information, at least with respect to the set speed signal in the high-speed region, a speed specified such that the rotational speed of the sewing machine when the start/stop command means 5 is used is lower than the rotational speed at the maximum depression when the controller is used. A speed control device for an electronic sewing machine, comprising a command means 3. (2) Sewing machine motor drive means 7 for driving the sewing machine motor operatively connected to the main shaft of the sewing machine, speed setting means 1 for setting the rotational speed of the sewing machine to a desired speed by an external operation provided on the sewing machine body, and the sewing machine body A controller 4 is detachably provided on the sewing machine and is normally released by elastic force and outputs a signal corresponding to the amount of operation in proportion to the operation in one direction, and a controller 4 is provided on the sewing machine body and starts and stops the stitch forming operation of the sewing machine. A start/stop command means 5, a pattern selection means 10 for selecting a desired sewing pattern from a large number of sewing patterns by external operation, and sewing data storing sewing data for forming stitches of the selected sewing pattern. a generating means 11; an upper shaft timing signal detecting means 12 that detects a predetermined rotational phase of the sewing machine main shaft and outputs phase information; In an electronic sewing machine having a pattern forming means 13 for forming a stitch 1 by controlling the amount of feed in the front-rear direction, and a controller connection determining means 2 for determining whether the controller is attached to or detached from the sewing machine main body, the pattern selection means 10 If the upper limit of sewing speed suitable for pattern formation of the pattern selected based on the information exceeds the predetermined speed, the setting speed signal of the speed setting means 1 and the connection of the controller connection determining means 2 are determined. Based on the information, at least for the set speed signal in the high speed range, the rotational speed of the sewing machine when the start/stop command means 5 is used is specified to be lower than the rotational speed at the maximum depression when the controller 4 is used. . In addition, when the speed does not exceed the predetermined specified speed, the start/stop command means 5 is used regardless of the connection presence information of the controller connection determination means 2 for the set speed signal in the entire speed range. A speed control device for an electronic sewing machine, comprising a speed command means 3 which makes the rotational speed of the sewing machine the same as the rotational speed at maximum depression when the controller 4 is used.