KR20060052109A - Sewing machine - Google Patents

Abstract

It is possible to change the height of the center presser foot at an arbitrary timing, thereby realizing a sewing machine which can perform sewing efficiently.

The sewing machine 100 which operates the sewing needle 108 and the holding frame 111 to form needle stitches according to the plurality of needle stitches data, based on sewing pattern data composed of a plurality of needle stitches data stored in the EEPROM 72. In the presser foot data, the center presser foot height adjustment control means for adjusting the height of the center presser foot 29 of the center presser foot device 1 based on the center presser foot height data stored as part of the sewing pattern data together with the needle stitch data. It was set as the structure provided with the control apparatus 1000. FIG.

Description

Sewing machine {SEWING MACHINE}

1 is a perspective view showing a sewing machine according to the present invention.

Figure 2 is an enlarged perspective view showing the vicinity of the holding frame and the center presser foot of the sewing machine according to the present invention.

3 is a side view of the center presser foot height adjustment before the center presser foot device.

4 is an exploded perspective view of the center presser foot device.

5 is an exploded perspective view of the center presser foot device.

It is a side view explaining the retraction mechanism (before retraction) of a central presser foot.

7 is a side view illustrating the retraction mechanism (during retraction) of the central presser foot.

Fig. 8 is a side view illustrating the retraction mechanism (after retraction) of the central presser foot.

9 is a side view of the center presser foot height of the center presser foot device after adjustment.

10 is a plan view showing an operation panel of the sewing machine.

It is explanatory drawing which shows the sewing pattern data of a sewing machine.

12 is an explanatory diagram showing a crotch (needle stitch shape) based on sewing pattern data.

13 is a block diagram showing a control device of the sewing machine.

It is explanatory drawing which shows the program pattern data of a sewing machine.

15 is a flowchart showing the operation of the sewing machine according to the present invention.

Fig. 16 is a flowchart showing the sewing processing operation of the sewing machine according to the present invention.

Explanation of symbols on the main parts of the drawings

1: center presser foot device 2: main shaft

2a: main shaft motor 29: center presser foot

42: center presser foot motor 70: ROM

71: RAM

72: EEPROM (memory means, center presser foot height memory means)

73: CPU 74a: operation panel

100: electronic cycle sewing machine (sewing machine) 101: sewing machine body

102: sewing machine frame 108: sewing needle

108a: needle bar 111: holding frame (cloth holding part)

1000: control device (center presser foot height adjustment control means)

The present invention relates to control of a sewing machine having a central presser foot device.

Conventionally, in sewing machines which hold the fabric by the frame-shaped cloth presser and convey it in the XY direction, such as a cycle sewing machine or an embroidery sewing machine, when the needle rises, it rises and flutters with the needle due to friction with the transition needle. The central presser foot device is installed to prevent this.

This center presser foot device has a center presser foot that moves up and down along the up and down movement of the needle in a state pressed downward by the elastic force. The central presser foot is normally coupled to the fabric at the lower end of the needle when the lower end is engaged with the cloth by the elastic force without following the lowering of the needle, and the needle penetrates the cloth to the elastic force when it is lifted out of the cloth. This pressurizes the cloth by pushing down the center presser foot, and the center presser foot rises along the needle after the needle is pulled out of the cloth.

In such a center presser foot device, in order to be able to adjust the height (center presser foot height) from the needle plate at the rising position of the center presser foot, to displace the rocking point of the rocking member for moving the center presser foot up and down. It is known that it can adjust (for example, refer patent document 1).

[Patent Document 1] Japanese Patent Laid-Open No. S63 (1988) -296783

However, in the conventional center presser foot device, it is impossible to change the center presser foot height during the sewing operation. For this reason, in order to correspond to the thickness of raw materials, such as cloth to sew, it is necessary to adjust the rocking member to adjust the height of the center presser foot before sewing, resulting in a decrease in productivity.

An object of the present invention is to provide a sewing machine capable of efficiently sewing by making it possible to change the height of the center presser foot at an arbitrary timing such as during a sewing operation.

In order to solve the above problems, the invention according to claim 1, the sewing needle which moves up and down, the retaining portion which can be moved relative to the direction intersecting with the shanghai east direction of the sewing needle and the sewing needle, and the vertical movement of the sewing needle A plurality of sewing pattern data comprising a central presser foot device having a central presser foot for pressing the sewing object downward so that the sewing object held in the cloth holding part does not rise together with the sewing needle. A sewing machine for storing a needle stitch according to a plurality of needle stitch data by operating said sewing needle and said cloth holding unit on the basis of a storage means for storing and said sewing pattern data stored in said storage means,

A center presser foot for controlling the drive unit based on the center presser foot height data relating to the center presser foot height stored in the storage means and a drive device connected to the center presser foot device to change the height of the center presser foot which is the rising position of the center presser foot; It is characterized by including a height adjustment control means.

According to the invention of claim 2, the sewing needle which moves up and down, the cloth holding part which is relatively movable in the direction intersecting with the shanghai east direction of the sewing needle by holding the sewing object, and can be moved up and down along the vertical movement of the sewing needle, A central presser foot device having a central presser foot for pressing the sewing object downward so that the sewing object held by the cloth holding portion does not rise together with the sewing needle, and memory means for storing a plurality of sewing pattern data consisting of needle stitch data; A sewing machine for forming needle stitches according to a plurality of needle stitches data by operating said sewing needle and said cloth retainer based on said sewing pattern data stored in said storage means,

A drive device connected to the center presser foot device to change the height of the center presser foot which is the raised position of the center presser foot, and a center for storing the center presser foot height data relating to the height position of the center presser foot of the center presser foot device in correspondence with the sewing pattern data. And a presser foot height adjustment control means for adjusting the height of the presser foot height of the center presser foot device based on the presser foot height storage means and the center presser foot height data stored in the center presser foot storage means.

Embodiment

Embodiment of this invention is described based on FIG.

In this embodiment, the electronic cycle sewing machine will be described as an example of the sewing machine. The electronic cycle sewing machine has a holding frame as a cloth holding part for holding a cloth, which is to be sewn, to be sewn, and as the holding frame moves relative to the sewing needle, predetermined sewing data (needle stitch pattern) is applied to the cloth held in the holding frame. It is a sewing machine that forms stitches on the basis of.

Here, the direction in which the sewing needle 108 to be described later moves up and down is called the Z-axis direction (up and down direction), and one direction orthogonal to this is called the X-axis direction (front and rear direction), and the Z-axis direction and the X-axis direction The direction orthogonal to both directions of is defined as the Y-axis direction (left and right directions).

Electronic cycle sewing machine 100 (hereinafter, the sewing machine 100), the sewing machine main body 101 is provided on the upper surface of the sewing machine table (T), as shown in Figure 1, the sewing machine main body is provided below the sewing machine table (T) It is comprised by the pedal R etc. for operating 101.

As shown in Fig. 1, the sewing machine main body 101 is provided with a sewing machine frame 102, the outer shape of which has a substantially o-shape when viewed from the side. The sewing machine frame 102 includes a sewing machine arm portion 102a which forms an upper portion of the sewing machine main body 101 and extends in the front and rear directions, and a sewing machine bed portion 102b which forms a lower portion of the sewing machine main body 101 and extends in the front and rear directions. And a vertical body portion 102c connecting the sewing machine arm portion 102a and the sewing machine bed portion 102b.

The sewing machine main body 101 has a power transmission mechanism disposed in the sewing machine frame 102, and has a main shaft 2 (see FIG. 4) and a lower shaft (not shown) extending in the front-rear direction so that rotation is possible. The main shaft 2 is disposed inside the sewing machine arm portion 102a, and the lower shaft (not shown) is disposed inside the sewing machine bed portion 102b.

The main shaft 2 is connected to the main shaft motor 2a (see FIG. 13), and is provided with a turning force by the main shaft motor 2a. In addition, the lower shaft (not shown) is connected to the main shaft 2 via a vertical axis (not shown). When the main shaft 2 is rotated, the power of the main shaft 2 is lowered through the vertical axis (not shown). To the side, the lower axis being pivoted.

The front end of the main shaft 2 is connected to the needle bar 108a moving up and down in the Z-axis direction in accordance with the rotation of the main shaft 2, and as shown in Fig. 2 at the lower end of the needle bar 108a. A sewing needle 108 is provided.

Moreover, the encoder 2b (refer FIG. 13) is provided in the drive extraction shaft or the main shaft of the main shaft motor 2a. The encoder 2b detects the rotation angle of the main shaft of the main shaft motor 2a. For example, the encoder 2b outputs a pulse signal to the control device 1000 whenever the main shaft of the main shaft motor 2a rotates by 1 °. It is. In addition, according to one rotation of the main shaft 2, the needle bar 108a makes one reciprocating motion.

In addition, a kiln (not shown) is provided at the front end of the lower shaft (not shown). When the lower shaft rotates together with the main shaft 2, needle stitches are formed by the cooperation of the sewing needle 108 and the kiln (not shown).

In addition, since the connection configuration of the main shaft motor 2a, the main shaft 2, the needle bar 108a, the sewing needle 108, the lower shaft (not shown), the kiln (not shown), and the like are the same as those conventionally known, It will not be described in detail here.

In addition, in order to prevent the fabric from being lifted up or down due to the up and down movement of the sewing needle 108, the sewing machine arm 102a moves up and down in association with the up and down movement of the needle bar 108a, and lowers the fabric around the sewing needle 108. The center presser foot device 1 (refer FIG. 3) which has the center presser foot 29 pressurized by this is provided. Moreover, the center presser foot device 1 is arrange | positioned inside the sewing machine arm part 102a, and the sewing needle 108 is inserted through the through-hole formed in the front end side of the center presser foot 29, and is provided.

1 and 2, the needle plate 110 is disposed on the sewing machine bed portion 102b, and the holding frame 111 and the sewing needle 108 are disposed above the needle plate 110. This is arranged.

The holding frame 111 is attached to the attachment member 113 disposed at the front end of the sewing machine arm portion 102a, and the attachment member 113 is provided with an X-axis motor 76a disposed in the sewing machine bed 102b; The Y-axis motor 77a is connected as a drive means (see FIG. 13).

The holding frame 111 holds the cloth as a to-be-sealed object, and moves the held cloth in front, rear, left and right directions for each of the holding frames 111 in accordance with the driving of the X-axis motor 76a and the Y-axis motor 77a. By moving the holding frame 111 and the operation of the sewing needle 108 and the kiln (not shown), the needle stitches are formed on the fabric based on the needle stitching data of the predetermined sewing pattern data.

In addition, the holding frame 111 is composed of a cloth pressing part (not shown) and a lower plate (not shown), and the attachment member 113 is driven by the cloth pressing part motor 79b disposed in the sewing machine arm 102a. It is possible to drive up and down, and to hold the cloth between the lower plate and the lower part when the cloth presses descend.

The pedal R drives the sewing machine 100 and operates as an operation pedal for moving the needle bar 108a (the sewing needle 108) up and down, or for operating the holding frame 111. That is, the pedal R includes a sensor (stepping amount detecting means) composed of, for example, a variable resistor, for detecting the stepping operation position where the pedal R is stepped on, and the output signal from the sensor is pedaled. It is output to the control apparatus 1000 mentioned later as an operation signal of (R), and the control apparatus 1000 is comprised so that it may drive and operate the sewing machine 100 according to the operation position and operation signal.

The center presser foot device 1 is provided in the main shaft 2 which drives the needle bar 108a provided with the sewing needle 108 in the up-down direction, as shown in FIGS. An eccentric cam 3 is fixed to the main shaft 2, and a connecting link 4 is connected to the eccentric cam 3. The oscillation shaft holder 5 is connected to the connection link 4, and one end of the oscillation shaft 6 is connected to the oscillation shaft holder 5.

3 to 5, the proximal end of the center presser foot adjustment arm 7 for adjusting the amount of movement of the center presser foot in the vertical direction D1 is fixed to the other end of the swing shaft 6. A groove cam 7a is formed in the central presser foot adjustment arm 7. The groove cam 7a is an arc-shaped long hole, and the desired position of the groove cam 7a and one end of the first link 8 are rotated by the adjusting nut 9 and the stepped screw 10. This is fixed freely. The fixed position is formed from a position intersecting the axis line of the swing shaft 6 to a range of a predetermined position on one end side of the center presser foot adjustment arm 7 at this intersection position, and within this range, it can be adjusted as desired. have.

The other end part of the 1st link 8 is connected so that rotation is free by the length part of the 2nd link 11, and the stepped screw 12. As shown in FIG. In addition, the groove cam 7a to which the adjusting nut 9 is engaged is centered on the shaft center of the stepped screw 12 when the center presser foot 29 is at the bottom dead center of the vertical reciprocating motion. Be part of an arc. The positioning link 13 is connected to the back side of the second link 11.

The positioning link 13 is attached to the sewing machine frame 102 as the sewing machine housing freely by a stepped screw 14 near its central portion, and the position of the stepped screw 14 is determined by the center presser foot 29. This coincides with the position of the stepped screw 12 at the bottom dead center.

A spring hanger 13a is formed at one end of the positioning link 13, a spring hanger 15a is fixed to the sewing machine frame 102, and a coil spring 16 is interposed between these spring hangers. The one end of the positioning link 13 to which 13a is attached is pressed down to pull down. That is, the coil spring 16 presses the connection part P1 downward when the connection part P1 with the 3rd link 20 in the 2nd link 11 as a center presser foot rocking part moved upwards. It functions as a pressurizing means. A stopper 17 is connected to the other end of the positioning link 13, and connected to one end of the second link 11 and the other end of the positioning link 13 by one end screw 18. It is. In addition, the stopper 17 is attached to the sewing machine frame 102 together with the positioning link 13 by the stepped screws 14 so as to be free to rotate. Above the one end 17a of the stopper 17, a restricting member 19 is provided to restrict the stopper 17 from rotating upward. In addition, the restriction member 19 may be substituted as a part of the sewing machine frame (102). Then, the center presser foot rocking mechanism M1 is configured by the first link 8, the second link 11, and the positioning link 13.

One end of the third link 20 is connected to the other end of the second link 11 so that rotation is free by the stepped screw 21. Rotation is freely connected to the other end of the third link 20 so that one end of the fourth link 22 is in series with the longitudinal direction of the third link 20 by a stepped screw 23. The center presser foot link member 24 is formed by the third link 20 and the fourth link 22.

The link relay plate 25 is connected to the other end of the fourth link 22 by a stepped screw 26. A center presser foot holder 27 is fixed to the link relay plate 25, and a center presser foot stand 28 extending in the vertical direction is held in the center presser foot holder 27. At the lower end of the center presser foot stand 28, a center presser foot 29 is attached to press the fabric onto the needle plate during sewing. The coil spring 30 is provided in the upper end of the center presser foot stand 28, and is attached to the center presser foot holder 27 by the bolt 31 and the nut 32. As shown in FIG.

The stepped screw 23 connects the third link 20 and the fourth link 22 together with the square piece 33 and the guide member 34. That is, the guide member 34 is provided on the front side of the fourth link 22, and the square piece 33 is installed on the front side of the guide member 34, and the third link 20, The four links 22, the square pieces 33, and the guide member 34 are connected with one step screw 23.

The square piece 33 serves as a spacer to fill the gap between the stepped screw 23 and the connecting portion P3 of the third link 20 and the fourth link 22, and provides a backlash of each link. It prevents and drives each member smoothly.

The guide member 34 is a substantially triangular plate member, and the upper end portion 34t is rotatably attached to the sewing machine frame 102 by a stepped screw 35. In the vicinity of the lower end of the guide member 34, a hole 34a having a long length in the vertical direction is formed. The long hole 34a is formed to have a width slightly larger than the diameter of the threaded portion of the stepped screw 23, and the stepped screw 23 is inserted into the long hole 34a. That is, the guide member 34 allows the connecting portion P3 of the third link 20 and the fourth link 22 to move in the up-down direction D1 of the center presser foot 29, and further, the third link ( The movement in the direction D3 across the series direction D2 of the 20 and the fourth link 22 is regulated.

Further, one end of the moving link 36 as a moving means for moving the guide member 34 in the direction transverse to the series direction of the third link 20 and the fourth link 22 is provided at the guide member 34. The screw 37 is connected so that rotation is free in the upper vicinity of the long hole 34a. An eccentric cam 38 is connected to the other end of the movable link 36, and one end of the variable shaft 39 is connected to the eccentric cam 38. The other presser foot motor 42 as a drive means is connected to the other end of the variable shaft 39 via a bearing 40 and a bevel gear 41. That is, the driving of the center presser foot motor 42 is transmitted in the order of the variable shaft 39, the eccentric cam 38, and the moving link 36 so that the moving link 36 moves the guide member 34.

The bevel gear 43 meshes with the bevel gear 41, so that the drive of the center presser foot motor 42 can be output in the direction D5 orthogonal to the axial direction of the variable shaft 39. At the rear end of the bevel gear 43, a bearing 44, a central presser foot lifting cam 45, and the like are connected coaxially.

As shown in Figs. 6 to 8, the center presser foot lifting cam 45 is formed in the shape of an arc having a substantially equal distance from the center of rotation to the outer circumferential surface on the center line passing through the center of rotation (hereinafter, The holding portion 45a), and the other side is a shape in which the distance from the center of rotation to the outer circumferential surface is larger than the distance from the center of rotation to the outer circumferential surface of the holding portion 45a, and changes smoothly (hereinafter, the change portion 45b). Is).

The center presser foot lifting cam 45 lifts the center presser foot raising member 46 which raises the center presser foot 29 to the retraction height position P5 after finishing sewing, and at one end of the center presser foot raising member 46. The outer peripheral surface of the center presser foot lifting cam 45 abuts on the outer peripheral surface of the cylindrical roller 47 provided. That is, when the holding part 45a of the center presser foot lifting cam 45 is in contact with the roller 47, the center presser foot raising member 46 does not rise (see Fig. 6), but the center presser foot lifting cam 45 The center presser foot raising member 46 is made to rise when the change part 45b of the abutment contact | abuts the roller 47 (refer FIG. 7 and FIG. 8). That is, the center presser foot retraction mechanism M2 is comprised by the center presser foot lifting cam 45, the center presser foot raising member 46, and the roller 47. As shown in FIG.

The center presser foot raising member 46 is attached to the sewing machine frame 102 by a pin 48 at its intermediate portion so as to be free to rotate. The center presser foot raising member 46 is provided so that the other end thereof is located below the center presser foot holder 27, and the change portion 45b of the center presser foot lifting cam 45 abuts against the roller 47. By raising the other end of the center presser foot raising member 46, the center presser foot holder 27 can be raised to raise the center presser foot 29 to the retracted height position P5 (see Fig. 8). In addition, a spring hook 49 is provided on the sewing machine frame 15 so as to be located above the center presser foot lift member 46, and one end of the coil spring 50 is hung on the spring hook 49, and the other The end part is caught in the vicinity of one end of the center presser foot raising member 46. Thereby, the one end of the center presser foot raising part 46 is always pressurized upward.

Next, the operation of the center presser foot device 1 having the above-described configuration will be described based on FIGS. 3 to 8.

When the main shaft 2 or the eccentric cam 3 is rotated by driving the main shaft motor 2a, the distal end of the connecting link 4 is in a direction orthogonal to the axis of the main shaft 2 (third link 20 ) And the swing shaft holder 5 connected to the connection link 4 also swing in the same direction. As the swing shaft holder 5 swings, the swing shaft 6 also swings, so that one end of the first link 8 is the swing point and the other end of the first link 8 is the axis of the swing shaft 6. It swings in the direction orthogonal to the direction (direction D3 intersecting with respect to the serial direction D2 of the third link 20 and the fourth link 22). According to the swing of the other end of the first link 8, the other end of the second link 11 swings in the series direction D2 of the third link 20 and the fourth link 22, and the second link The third link 20 and the fourth link 22 connected to the other end of (11) swing in the series direction (up-down direction; D2). In accordance with the fluctuations of the third link 20 and the fourth link 22, the center presser foot 28 connected to the fourth link 22 moves downward along the up-down direction D1, so that the center presser foot 29 ) Moves up and down.

Next, the adjustment operation of the center presser foot height position P4 by the center presser foot device 1 having the above-described configuration will be described based on FIGS. 3 to 9.

When the CPU 73 of the control apparatus 1000 described later executes the control program, the center presser foot motor 42 starts driving based on the sewing pattern data and the center presser foot height data stored in the EEPROM 72 described later. do.

The drive of the center presser foot motor 42 is transmitted to the movable shaft 39 through the bevel gear 41 and the bearing 40, and the movable shaft 39 starts to rotate. As the movable shaft 39 rotates, the eccentric cam 38 also rotates, and the movable link 36 is in a direction substantially orthogonal to the axis of the movable shaft 39 (third link 20 and fourth link 22). Rocking in the direction D3 crossing the series direction D2. By oscillation of the movable link 36, the guide member 34 swings in the direction D3 transverse to the series direction D2 of the third link 20 and the fourth link 22.

At this time, as shown in FIG. 9, the stepped screw 23 of the connection part P3 of the 3rd link 20 and the 4th link 22 connected with the elongate hole 34a of the guide member 34 is the screw. Since the portion of the third link 20 and the fourth link 22 are restricted in the direction D3 intersecting with the serial direction D2 by the long hole 34a, the portion is transmitted by swinging. Since there is no place to release the force, the stepped screws 23 move upward along the long hole 34a, and as the stepped screws 23 move along the guide member 34, they are connected side by side in series. The angle (theta) which the 3rd link 20 and the 4th link 22 which were existed changes, and the center presser foot link member 24 becomes roughly shaped. When the center presser foot link member 24 is approximately shaped, the distance L between both ends of the center presser foot link member 24, that is, one end of the third link 20 and the other end of the fourth link 22. The distance L between them becomes short, and the center presser foot 29 moves upward along the up-down direction D1. Thereby, the center presser foot height position P4 can be adjusted from the needle plate of the center presser foot 29.

In addition, the sewing machine 100 (the sewing machine main body 101), as shown in Figs. 1 and 10, has an operation panel 74a for the operator to perform various setting operations for the sewing machine or input operation of various data. . The operation panel 74a and the sewing machine main body 101 are connected by a wired or wireless line (not shown).

The operation panel 74a includes a plurality of groups of operation keys capable of various settings of the sewing machine, various data input operations, a data display portion 74d for displaying various setting states, and the like.

As shown in Fig. 10, the operation panel 74a includes a data display section 74d, a ready key 74e, a reset key 74f, a + / forward key 74g, a-/ retract key 74h, and a pattern No. Key 74i, X zoom factor key 74j, Y zoom factor key 74k, speed key 74l, presser foot height key 74m, program key ("Pr1", "Pr2", "Pr3", &Quot; Pr4 ": 74o, and LEDs 90, 91 and the like for indicating the operating state of the sewing machine or each key, and the like are provided.

The data display portion 74d displays a portion where the LED 91 is lit, various data numbers corresponding to the keys, data values, and the like.

The preparation key 74e is a key for performing an operation for confirming the data or numerical value changed by the + / forward key 74g, the-/ retract key 74h, or the like.

The reset key 74f is a key for performing an operation for resetting data or numerical values changed by the + / forward key 74g, the − / retract key 74h, or the like.

The + / forward key 74g and the − / retract key 74h are keys for performing operations for changing various data numbers and data values (forward transfer; +, reverse transfer;-).

The pattern No. key 74i retrieves sewing pattern data corresponding to the sewing pattern data in order to select desired sewing pattern data, for example, when sewing is performed by sewing pattern data that is set and stored in advance. The key for displaying the sewing pattern No.

Here, the sewing pattern will be described.

The sewing pattern is a needle stitch pattern for sewing. In order to execute the needle stitch pattern, data of the X direction movement amount and the Y direction movement amount (needle stitch indicating the needle drop position) when the holding frame 111 is moved Data) is represented by sewing pattern data formed by a plurality of combinations. 11 and 12 show actual sewing pattern data and an example of a sleeping pattern. When a crochet is made according to the sewing pattern data of pattern No. 1 shown in Fig. 11 from the origin position (0, 0), the crotch is shown in Fig. 12, and needle stitches are formed.

In the sewing pattern data shown in Fig. 11, preliminary feed (1), preliminary feed (2), preliminary feed (3). The sewing 16 and the sewing 17 are data (parameters) of the X-direction moving amount and the Y-direction moving amount when the holding frame 111 is moved. In the "preliminary transfer", the needle bar 108a (the sewing needle 108) does not operate, and only the holding frame 111 moves, and in the "sewing", the needle bar 108a (the sewing needle 108 together with the holding frame 111). )) Is operated to form needle stitches. In addition, "center presser foot height", "thread cutting", and "end" are commands for the operation of the center presser foot device 1, the thread cutting device (not shown), and the sewing machine 100, respectively, Numerical data (e.g., central presser foot height data (parameter) indicating the height position of the central presser foot).

In addition, "15" in the numerical data of the X movement amount (Y movement amount) and the center presser foot movement amount represents "1.5 mm".

The X enlargement reduction rate key 74j and the Y enlargement reduction rate key 74k are keys for displaying the enlargement reduction rate of the pattern when the sewing pattern is executed.

The speed key 74l is a key for displaying the sewing machine speed at the time of sewing.

The center presser foot height key 74m is a key for displaying the height of the center presser foot 29 of the center presser foot device 1 at the time of sewing.

Program key ("Pr1", "Pr2", "Pr3", "Pr4"; 74o) is a data (program) for performing tailor sewing, which is a combination of sewing pattern data, enlargement / reduction ratio, sewing machine speed, center presser foot height, and the like. Pattern data).

In addition, various types of data such as sewing data set and inputted through various keys on the operation panel 74a are output to the control apparatus 1000 described later and stored in the EEPROM 72 described later.

Moreover, the sewing machine 100 (the sewing machine main body 101) is provided with the control apparatus 1000 for controlling the operation | movement of each part and each member mentioned above as shown in FIG.

As shown in FIG. 13, the control device 1000 includes a ROM 70, a RAM 71, an EEPROM 72, and a CPU 73.

The ROM 70 stores and stores control programs, control data, and various sewing data of the sewing machine 100 (the sewing machine main body 101).

The RAM 71 is provided with various work memories, counters, etc., and is used as a work area during sewing operation or data processing, and temporarily stores a program or data read from the ROM 71.

The EEPROM 72 stores input various data and various parameters.

In particular, the EEPROM 72 stores, as the storage means, sewing pattern data (eg, sewing pattern data of pattern No. 1 in FIG. 11, etc.) formed by combining a plurality of needle stitch data input through the operation panel 74a. It is supposed to be.

The EEPROM 72 also stores data of X magnification and Y magnification, sewing machine speed data, center presser foot height data, and the like. In particular, the EEPROM 72 functions as a center presser foot height storage means for storing center presser foot height data in correspondence with sewing pattern data in which a plurality of needle stitch data are combined. In addition, the sewing pattern data to which the center presser foot height data correspond may not contain the center presser foot height data, and may be included as the sewing pattern data of pattern No. 1 of FIG.

Further, the EEPROM 72 stores program pattern data (e.g., program pattern data " in FIG. 14 ") in which these sewing pattern data, data of X magnification or Y magnification, sewing machine speed data, center presser foot height data, etc. are combined. Pr1 "," Pr2 "," Pr3 "," Pr4 "), and the like.

The CPU 73 uses the RAM 71 as a work area (work area) to perform various operation processes, arithmetic processing, and the like based on the control program stored in the ROM 70.

Then, the control device 1000, based on the center presser foot height data stored in the EEPROM 72 as part of the sewing pattern data together with the plurality of needle stitch data, the height of the center presser foot 29 of the center presser foot device 1 It serves as a center presser foot height adjustment control means for adjusting the pressure.

In addition, the control apparatus 1000 is based on the center presser foot height 29 of the center presser foot device 1 based on the center presser foot height data stored in the EEPROM 72 serving as the center presser foot height storage means in correspondence with the sewing pattern data. It functions as a center presser foot height adjustment control means for adjusting the height of the.

Moreover, the control apparatus 1000 as a height adjustment control means adjusts the height of the center presser foot 29 of the center presser foot device 1 by controlling the drive of the center presser foot motor 42.

The CPU 73 is connected to the operation panel 74a via the interface 74, and selects and changes sewing pattern data based on data input from the operation panel 74a.

In addition, the CPU 73 is connected to the cloth presser switch 74b and the start switch 74c via the interface 74, and an instruction signal is input from the cloth presser switch 74b and the start switch 74c. In this case, a process of sewing is performed on each part of the sewing machine 100 based on the above-mentioned sewing pattern data or the like.

In addition, the CPU 73 is connected to the main shaft motor drive circuit 75b for driving the main shaft motor 2a through the interface 75, thereby controlling the rotation of the main shaft motor 2a, thereby driving mechanism. (E.g., needle bar 108a, main shaft 2, etc. to which sewing needle 108 is attached). The main shaft motor 2a is provided with an encoder 2b, and in the main shaft motor drive circuit 75b for driving the main shaft motor 2a, the main shaft motor 2a receives a pulse signal output from the encoder 2b. A signal generated by processing to correspond to the rotation angle of (2) is input to the CPU 73 through the interface 75, and the CPU 73 can recognize the rotation angle of the main shaft 2 by this signal. Can be.

In addition, for example, a servo motor can be applied to the main shaft motor 2a.

In addition, the CPU 73 drives the X-axis motor 76a and the Y-axis motor 77a which are provided in the holding frame 111 for holding the cloth to be sewn through the interface 76 and the interface 77, respectively. It is connected to the axial motor drive circuit 76b and the Y-axis motor drive circuit 77b to control the operation in the X-axis direction and the Y-axis direction of the holding frame 111.

In addition, the CPU 73 is connected to the center presser foot motor driving circuit 78b for driving the center presser foot motor 42 for operating the center presser foot 29 of the center presser foot device 1 through the interface 78. The operation of the central presser foot device 1 is controlled.

In addition, the CPU 73 is connected to the cloth presser motor driving circuit 79b for driving the cloth presser motor 79a for moving the cloth presser (not shown) up and down through the interface 79. Control the operation of the press.

In addition, for example, a pulse motor can be applied to the X-axis motor 76a, the Y-axis motor 77a, the center presser foot motor 42, and the cloth presser motor 79a.

In addition, the CPU 73 is connected to the X-axis origin sensor 80a and the Y-axis origin sensor 80b for detecting the home position of the holding frame 111 through the interface 80, and the holding frame 111 is connected to the CPU 73. A signal indicating whether or not it has returned to this home position is input, and control is performed based on the signal.

In addition, the CPU 73 is connected to the center presser foot origin sensor 80c for detecting the home position of the center presser foot 29 of the center presser foot device 1 via the interface 80, and the center presser foot device 1. A signal indicating whether or not the central presser foot 29 is located in the normal arrangement is input, and control is performed based on the signal.

In addition, the CPU 73 is connected to the cloth pressing portion home sensor 80d for detecting the home position of the cloth pressing portion (not shown) via the interface 80, and whether the cloth pressing portion is returned to the home position. Signal is inputted, and control is performed based on the signal.

Next, operation | movement of the sewing machine 100 which concerns on this invention is demonstrated based on the flowchart shown to FIG. 15, FIG.

First, the main power supply (not shown) of the sewing machine 100 is operated ON, and in the state where the sewing machine 100 is activated, program keys ("Pr1", "Pr2", "Pr3", "Pr4"); When the control device 1000 detects the signal of pressing 74o (step S101; Yes), the control device 1000 determines a predetermined value according to the pressed program key 74o from the program pattern data stored in the EEPROM 72. Program pattern data is selected, extracted, expanded to RAM 71, and set (step S102).

Then, when the control apparatus 1000 does not detect the signal in which the program key 74o is pressed (step S101; No) or after setting the program pattern in step S102, the control proceeds to step S103.

Subsequently, the control device 1000 receives a signal in which the pattern No. key 74i, the X zoom factor key 74j, the Y zoom factor key 74k, the speed key 74l, and the center presser foot height key 74m are pressed. If it detects (step S103; Yes), the control apparatus 1000 displays the setting content or setting data according to each key on the data display part 74d, and lights up the corresponding LED 91 (step S104).

Then, the controller 1000 presses the pattern No. key 74i, the X zoom factor key 74j, the Y zoom factor key 74k, the speed key 74l, and the center presser foot height key 74m. Is not detected (step S103; No), or after the operation in step S104, the process proceeds to step S105.

Subsequently, when the control device 1000 detects a signal in which the + / forward key 74g and the − / retract key 74h are pressed (step S105; Yes), the control device 1000 displays the data display part 74d. The set setting contents and setting data are changed (step S106).

Then, when the control apparatus 1000 does not detect a signal in which the + / forward key 74g and the − / retract key 74h are pressed (step S105; No), or after the setting change in step S106, the process goes to step S107. To fulfill.

Subsequently, the control apparatus 1000 monitors whether the preparation key 74c is operated, and when the control apparatus 1000 does not detect a signal in which the preparation key 74c is pressed (step S107; No). Then, the process returns to step S101. On the other hand, when the control apparatus 1000 detects the signal in which the preparation key 74c is pressed (step S107; Yes), it confirms the setting changed in step S106, and advances to step S108.

Subsequently, the control apparatus 1000 determines that the pattern No., X enlargement reduction rate, Y enlargement reduction ratio, sewing machine speed, and center presser foot height of the program selected and set in step S102 are changed (step S108; Yes). The data of the program pattern is written into the EEPROM 72 (step S109), and the flow proceeds to step S112. On the other hand, if the control device 1000 determines that the program has not been changed (step S108; No), the process proceeds to step S110.

Then, the control apparatus 1000 determines whether or not the data of the center presser foot height is changed (step S110).

If the control device 1000 determines that the data of the center presser foot height is changed (step S110; Yes), the control device 1000 writes the changed new center presser foot height data to the EEPROM 72 (step S111). On the other hand, when the control apparatus 1000 determines that the data of the center presser foot height is not changed (step S110; No), or moves to step S112 after data writing in step S111.

Next, the control device 1000 drives the cloth pressing unit motor 79a to perform an origin search for moving the cloth pressing unit (not shown) to the detection position of the cloth pressing unit origin sensor 80d (step S112). . Also, the origin position of the cloth pressing portion is the cloth pressing portion falling position.

In addition, the control apparatus 1000 drives the center presser foot motor 42 to perform home search for moving the center presser foot to the detection position of the center presser foot origin sensor 80c (S113). The origin position of the center presser foot is the center presser foot rising position.

In addition, the control apparatus 1000 drives the X-axis motor 76a and the Y-axis motor 77a to move the holding frame 111 to the detection position of the X-axis origin sensor 80a and the Y-axis origin sensor 80b. After performing the circular check color to move, the holding frame 111 is moved to the sewing start position of the selected sewing pattern data (step S114).

And the control apparatus 1000 drives the cloth pressing part motor 79a, and raises a cloth pressing part (not shown) (step S115).

Next, the control apparatus 1000 determines whether the cloth pressing part SW 74b is pressed (step S116).

When the control apparatus 1000 does not detect the signal to which the cloth pressing part SW 74b was pressed (step S116; No), it returns to step S116. On the other hand, when the control apparatus 1000 detects the signal to which the cloth pressing part SW 74b is pressed (step S116; Yes), the cloth pressing part motor 79a is driven, and the cloth pressing part (not shown) is carried out. (Step S117).

In addition, the control apparatus 1000 determines whether the cloth pressing part SW 74b is pressed (step S118).

When the control apparatus 1000 detects the signal pressed by the cloth pressing part SW 74b (step S118; Yes), the cloth pressing part motor 79a is driven to raise the cloth pressing part (not shown). (Step S119), the process returns to step S116. On the other hand, when the control apparatus 1000 does not detect the signal to which the cloth pressing part SW 74b was pressed (step S118; No), it progresses to step S120.

Next, the control apparatus 1000 determines whether the start SW 74c is pressed (step S112).

If the control apparatus 1000 does not detect the signal to which the start SW 74c was pressed (step S120; No), it returns to step S118. On the other hand, when the control apparatus 1000 detects the signal to which the start SW 74c is pressed (step S120; Yes), it performs a sewing operation process (step S121), and transfers to step S122 after completion | finish of the process. .

Then, the control apparatus 1000 drives the X-axis motor 76a and the Y-axis motor 77a to move the holding frame 11 from the sewing end position to the sewing start position (step S122).

Further, the control device 1000 drives the cloth pressing unit motor 79a, raises the cloth pressing unit (not shown) (step S123), and returns to step S116, whereby the sewing operation is repeated.

Next, the sewing operation processing in step S121 will be described based on the flowchart shown in FIG.

The sewing machine 100 sews based on the sewing pattern data in the program pattern data selected in step S101 or the plurality of needle stitch data in the sewing pattern data selected in step S102.

First, the control apparatus 1000 determines whether the needle stitch data of the selected sewing pattern data is "preliminary transfer" data (step S201).

If the control apparatus 1000 determines that the needle stitch data is "preliminary transfer" data (step S201; Yes), the control apparatus 1000 moves the X-axis motor 76a and the Y-axis motor 77a to the "preliminary transfer" data. The driving frame is driven based on the X moving amount and Y moving amount in the step (step S202).

Then, when the control apparatus 1000 determines that the needle stitch data is not "preliminary transfer" data (step S201; No), or the operation in step S202, the control proceeds to step S203.

Next, the control apparatus 1000 determines whether the needle stitch data of the selected sewing pattern data is "end data (end command)" (step S203).

If the control device 1000 determines that the needle stitch data is "end data (end command)" (step S203; Yes), the sewing operation processing (subroutine) ends and returns to the main routine. On the other hand, if the control apparatus 1000 determines that the needle stitch data is not "end data (end command)" (step S203; No), the process proceeds to step S204.

Next, the control apparatus 1000 determines whether the selected sewing pattern data is selected as the program pattern data (step S204).

If the control device 1000 determines that the sewing pattern data is selected as the program pattern data (step S204; Yes), the control device 1000 operates the center presser foot motor 42 according to the center presser foot height data in the program pattern data. By operating, the center presser foot 29 is lowered to a predetermined height and arranged (step S205), and the process proceeds to step S207.

On the other hand, if the control device 1000 determines that the sewing pattern data is not selected as the program pattern data (step S204; No), the control device 1000 determines the center presser foot motor 42 according to the center presser foot height data in the sewing pattern data. ), The center presser foot 29 is lowered to a predetermined height and arranged (step S206), and the flow advances to step S207.

Next, the control apparatus 1000 outputs the sewing machine speed command to the main shaft motor drive circuit 75b according to the set sewing machine speed, and turns on the sewing machine rotation command to turn on the main shaft of the sewing machine 100 ( 2) is rotated and the needle bar 108a (sewing needle 108) is operated (step S207).

Next, the control apparatus 1000 determines whether the needle stitch data of the selected sewing pattern data is "thread cutting data (thread cutting command)" (step S208).

If the control device 1000 determines that the needle stitch data is "thread cutting data (thread cutting command)" (step S208; Yes), the control proceeds to step S213.

On the other hand, if the control apparatus 1000 determines that the needle stitch data is not "thread cutting data (thread cutting command)" (step S208; No), it progresses to step S209.

Next, the control apparatus 1000 determines whether the needle stitch data of the selected sewing pattern data is "sewing" data (step S209).

If the control device 1000 determines that the needle stitch data is "sewing" data (step S209; Yes), the control device 1000 sets the X-axis motor 76a and the Y-axis motor 77a to X of the "sewing" data. The driving frame is driven based on the movement amount and the Y movement amount, and the holding frame 111 is moved to form needle stitches in cooperation with the sewing needle 108 (needle bar 108a) (step S210).

Then, when the control apparatus 1000 determines that the needle stitch data is not "sewing" data (step S209; No), or the operation in step S210, the process proceeds to step S211.

Next, the control apparatus 1000 determines whether the needle stitch data of the selected sewing pattern data is "center presser foot height data (center presser foot height command)" (step S211).

If the control device 1000 determines that the needle stitch data is "center presser foot height data (center presser foot height command)" (step S211; Yes), the controller 1000 presses the center presser foot motor 42 according to the center presser foot height data. ), The center presser foot 29 is lowered to a predetermined height to change the arrangement (step S212), and the process returns to step S208. On the other hand, when the control apparatus 1000 determines that the needle stitch data is not "center presser foot height data (center presser foot height command)" (step S211; No), the control returns to step S208.

In step S213, the control device 1000 outputs the thread cutting command to the thread cutting device (not shown), cuts the thread, turns off the sewing machine rotation command, and outputs the sewing machine stop command (step S213). ), The sewing needle 108 waits for the needle to stop at the position (step S214).

If the control device 1000 determines that the main shaft 2 has stopped and the sewing machine 100 has stopped (step S214; Yes), the control device 1000 operates the center presser foot motor 42 to operate the center presser foot. (29) is raised to a predetermined height and placed in the standby position (step S215), and the process returns to step S201.

Thus, when sewing the sewing machine 100 according to the present invention based on the sewing pattern data stored in the EEPROM 72, the center presser foot height data stored as part of the sewing pattern data, and the sewing pattern The height position of the center presser foot 29 of the center presser foot device 1 is controlled by controlling the operation of the center presser foot motor 42 of the center presser foot device 1 based on the center presser foot height data stored in correspondence with the data. Can be adjusted to change.

That is, the sewing machine 100 includes the sewing pattern data by including the center presser foot height data for adjusting the height of the center presser foot 29 of the center presser foot device 1 in the sewing pattern data and the program pattern data in advance. When sewing is performed on the basis of the program pattern data, the center presser foot height data functions as an instruction in the sewing data for sewing, and the height position of the center presser foot 29 can be adjusted. By adjusting the height of the center presser foot 29 in (1), the height of the center presser foot 29 can be changed.

As a result, the sewing machine 100 may be referred to as a sewing machine capable of changing the height of the center presser foot 29 at an arbitrary timing, so that sewing can be performed efficiently.

In the above embodiment, the EEPROM 72 is described as an example of the storage means and the center presser foot height storage means. However, the present invention is not limited thereto, and other storage means (magnetic recording medium, optical recording) are not limited thereto. Medium, semiconductor memory, etc.) may be provided.

In addition, it may be a drive mechanism such as one-axis drive or circular arc drive, instead of the XY mechanism.

Moreover, of course, it can change suitably also about other specific detailed structure.

According to the invention as set forth in claim 1, the sewing machine operates the sewing needle and the cloth retainer based on the sewing pattern data stored in the storage means to form the stitches according to the plurality of needle stitches data. The height of the center presser foot of the center presser foot device can be adjusted based on the center presser foot height data stored as a part of. That is, by including the center presser foot height data for adjusting the height of the center presser foot of the center presser foot device in the sewing pattern data in advance, the sewing machine performs sewing based on the sewing pattern data, and the center presser foot height data is Functions like the instruction in the sewing pattern data for sewing, and the height position of the center presser foot can be adjusted, so that the height of the center presser foot can be adjusted to the center presser foot device at a desired timing, thereby changing the height of the center presser foot. .

Thus, such a sewing machine can be said to be a sewing machine that can perform the sewing efficiently by being able to change the height of the center presser foot at an arbitrary timing.

According to the invention as set forth in claim 2, the sewing machine operates the sewing needle and the cloth holding unit based on the sewing pattern data stored in the storage means, and when the needle stitches according to the plurality of needle stitching data are formed, the sewing machine is made to correspond to the sewing pattern data. The height of the center presser foot of the center presser foot device can be adjusted based on the center presser foot height data stored in the center presser foot height storage means. In other words, by creating the program pattern data including the center presser foot height data corresponding to the sewing pattern data in advance, the sewing machine performs sewing based on the program pattern data, so that the center presser foot height data is sewn from the program pattern data. Since it functions as a command and the height position of a center presser foot can be adjusted, it becomes possible to adjust the height of a center presser foot to a center presser foot device at a desired timing, and to change the height of a center presser foot.

Thus, such a sewing machine can be called a sewing machine that can efficiently perform sewing by allowing the height of the center presser foot to be changed at an arbitrary timing.

Claims (2)

The sewing needle moving up and down, A cloth holding part capable of holding the object to be relatively moved in a direction crossing the shanghai east direction of the sewing needle; A center presser foot device having a center presser foot capable of elevating according to the up and down movement of the sewing needle, and pressing the sewing object downward so that the sewing object held in the cloth holding part does not rise with the sewing needle; Memory means for storing a plurality of sewing pattern data consisting of needle stitch data; A sewing machine for forming needle stitches according to a plurality of needle stitches data by operating said sewing needle and said cloth retaining unit based on said sewing pattern data stored in said storage means, A driving device connected to the center presser foot device to change the height of the center presser foot, which is a rising position of the center presser foot, And a center presser foot height adjustment control means for controlling the drive device on the basis of the center presser foot height data relating to the center presser foot height stored in the storage means. The sewing needle moving up and down, A cloth holding part which is capable of moving relative to a direction crossing the shanghai east direction of the sewing needle by maintaining the sewing object; A center presser foot device having a center presser foot capable of elevating according to the up and down movement of the sewing needle, and pressing the sewing object downward so that the sewing object held in the cloth holding part does not rise with the sewing needle; Memory means for storing a plurality of sewing pattern data consisting of needle stitch data; A sewing machine for forming needle stitches according to a plurality of needle stitches data by operating said sewing needle and said cloth retaining unit based on said sewing pattern data stored in said storage means, A driving device connected to the center presser foot device to change the height of the center presser foot, which is a rising position of the center presser foot, Center presser foot height storage means for storing the center presser foot height data relating to the height position of the center presser foot of the center presser foot device in correspondence with the sewing pattern data; And a presser foot height adjustment control means for adjusting the height of the center presser foot of the center presser foot device based on the center presser foot height data stored in the center presser foot storage means.

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