JP4299935B2 - Sewing sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bead stitch sewing machine capable of reliably forming a bead.
[0002]
[Prior art]
In general, pocket stitches such as slacks, jackets, and work clothes, and zipper attachments such as jumpers and duvet covers are decorated with a so-called rim (split ball). Such a bead is formed by a bead stitch sewing machine.
[0003]
A conventional general edge stitch sewing machine will be described using the bead stitch sewing machine of the present invention.
[0004]
As shown in FIGS. 1 to 3, the conventional ball edge stitching machine has a two-needle sewing machine 2 having two needles N, a cloth feeding device 3, and a ball edge cloth folding device 4. Yes.
[0005]
The cloth feeding device 3 includes a pair of cloth presser parts 5 that hold the edge cloth K in a state of being overlapped on the cloth W to be sewn at the tip part. With the driving force of the motor 6, on the sewing table T, at least from the set position P1 where both the cloths W, K are set to the sewing position P2 where the both cloths W, K are sewn, in detail, the two on the sewing table T As shown by an imaginary line in FIG. 1 with a sewing position P2 located below the needle of the needle sewing machine 2, the set position P1 located on the upstream side in the sewing direction indicated by the arrow Y in FIG. Between the corner knife position P3 located in the downstream of the sewing direction shown as a continuous line, it is arrange | positioned so that reciprocation is possible along a sewing direction, and it can move up and down. Each cloth presser portion 5 is provided with a ball cloth presser portion 7 that has both functions of holding and folding the ball edge cloth K. With a driving force of an actuator such as a cylinder, it is arranged to be individually movable in a direction orthogonal to the sewing direction. That is, both the ball edge cloth presser portions 7 are formed so as to be freely movable with respect to a presser foot 8 described later.
[0006]
  The ball edge cloth folding device4Has a presser foot 8 having an inverted T-shaped cross section, which includes a horizontal portion 8a and a vertical portion 8b that can be lowered onto the ball cloth K at the set position P1. The presser foot 8 is disposed so as to be movable up and down by a driving force of an actuator such as an air cylinder (not shown). Further, as shown in FIG. 3, a pair of beaded cloth guides 9 are disposed substantially in parallel at a predetermined interval across the vertical portion 8b on the front end side of the presser foot 8 in the sewing direction. . Furthermore, the center knife 10 is disposed at the sewing position P1 so as to be movable up and down by the driving force of an actuator such as an air cylinder (not shown). At the corner knife position P3, two corners are spaced from each other in the sewing direction. The knife 11 is disposed so as to be movable up and down with a driving force of an actuator such as an air cylinder (not shown).
[0007]
In such a conventional stitch stitch sewing machine, after setting the cloth to be sewn W at a predetermined angle on the set position P1 on the sewing table T, the cloth presser portion 5 which is lifted at the set position P1 and stands by is set. The cloth is lowered to press the cloth to be sewn W, and further the ball edge cloth K is set on a predetermined position on the cloth to be sewn W. Thereafter, as shown by the solid line in FIG. 1, the presser foot 8 that is lifted and waiting is lowered as shown by the imaginary line in FIG. 1, and the ball cloth K is applied to the horizontal portion 8 a of the presser foot 8. After pressing from above, the ball cloth presser portion 7 is protruded so as to approach the vertical portion 8b of the presser foot 8, and the ball cloth K has an inverted T-shaped cross section as shown in FIGS. Hold it.
[0008]
Then, in a state where the ball cloth K is superposed on the sewing cloth W and the ball cloth K is held in an inverted T-shaped cross section, the cloth feed motor 6 is driven to move both the cloths W and K together with the cloth presser 5. From the set position P1 to the sewing position P2, the stitches are formed by the two-needle sewing machine 1 at the sewing position P2 below the needle. At this time, since the presser foot 8 is fixed, it does not move, and the ball cloth K is moved under the needle of the two-needle sewing machine 1 along with the cloth W along the longitudinal direction of the fixed presser foot 8. Move to. Further, the upright portion Ka along the vertical portion 8b of the presser foot 8 located at the front end portion in the moving direction of the ball edge fabric K is between the vertical portion 8b of the presser foot 8 and the ball edge fabric guides 9 and 9. By passing through this gap, the sewing machine moves to the sewing position P2 while maintaining the upright state, and moves away from the movement path of the needle N at the sewing position P2. Simultaneously with the start of sewing, the gap between the stitches by the needles N is cut open by the rising of the center knife 10 to form a bead hole.
[0009]
Next, the cloths W and K that have been sewn and cut at the sewing position P2 move to the corner knife position P3, and when the corner knife 11 rises, both ends along the sewing direction of the edge hole have a wedge shape or the like. The formation of the bead is completed by forming a cut in the shape.
[0010]
The operation of each part of the edge stitch sewing machine is controlled by a control means (not shown) different from the present invention.
[0011]
[Problems to be solved by the invention]
  However, in the above-described conventional edge stitch sewing machine, both the cloth presser 5 and the cloths W and K are moved from the set position P1 through the sewing position P2 to the corner knife position P3 at a constant speed. More specifically, since the sewing speed is set to form the seam, when both the fabrics W and K are fed together with the fabric presser 5,, SewingIn the case where the waist of the ball cloth K used for making is weak, the upright portion Ka of the ball cloth K is caught on the ball cloth presser portion 7, and the vertical portion 8 b of the presser foot 8 and the ball cloth guide 9, There is a problem in that it may not be possible to reliably and smoothly pass through the gap between them.
[0012]
In other words, depending on the type of the ball edge cloth, there is a problem that the ball edge cloth cannot be reliably moved to the sewing position under the needle during blank feeding.
[0013]
The present invention has been made in view of these points, and at the time of idling, the edge stitch that can reliably move the edge fabric to the sewing position under the needle regardless of the type of the ball edge fabric. The purpose is to provide a sewing machine.
[0014]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present inventors have made it necessary to obtain an edge stitch sewing machine that can reliably move the ball edge cloth to the sewing position under the needle regardless of the type of the ball edge cloth during the idle feeding. As a result of diligent research over a period of time, it is possible to control the idle feed speed during idle feeding according to the type of ball edge fabric, specifically by slowing it down, regardless of the type of ball edge fabric during idle feeding. The present invention has been completed by finding that the ball edge fabric can be reliably moved to the sewing position under the needle without any problem.
[0015]
  That is, the feature of the edge stitch sewing machine of the present invention according to claim 1 of the claims is a control motor in which the cloth feed motor can control the rotation speed, and the control means controls the movement speed of the cloth presser portion. To control the rotation speed of the cloth feed motor, at least the blank feed speed of the cloth presser during blank feedTo be lateIt is in the point which is comprised. And by adopting such a configuration, the blank feeding speed during blank feeding can beWaist strengthSince it can be controlled according to the type, the ball edge fabric can be reliably moved to the sewing position under the needle without any problem during the idle feeding regardless of the type of the ball edge fabric.In other words, when the ball cloth is weak at the time of empty feed, the upright part of the ball cloth is caught by the ball cloth presser, and the gap between the vertical part of the presser foot and the ball guide It is possible to reliably prevent the inconvenience that it cannot pass reliably and smoothly. That is, even when the waist is weak depending on the type of the ball edge cloth, the gap can be smoothly passed.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings. In addition, the same code | symbol is attached | subjected about the structure same as the conventional thing mentioned above, or the detailed description is abbreviate | omitted.
[0019]
1 to 3 show an embodiment of a bead stitch sewing machine according to the present invention. FIG. 1 is a perspective view showing the main part of the overall configuration, FIG. 2 is a front view of FIG. 1, and FIG. FIG. 4 is a block diagram showing the control system, FIG. 5 is a plan view showing the main part of the operation panel together with the initial screen, and FIG. 6 is the main part of the operation panel. It is a top view shown with a detailed screen.
[0020]
As shown in FIG. 1 and FIG. 2, the ball edge cloth sewing machine 1 of the present embodiment includes a two-needle sewing machine 2 having two needles N, a cloth feed device 3, and a ball edge cloth folding device 4. Have.
[0021]
The cloth feeding device 3 includes a pair of cloth presser portions 5 and 5 that hold the ball edge cloth K in a state of being overlapped on the cloth W to be sewn at the front end portion. With the driving force of the cloth feed motor 6 composed of a servo motor or a pulse motor that can rotate in the forward and reverse directions, the sewing table T is sewn from the set position P1 at which both the cloths W, K are set to both the cloths W, K. In detail, up to the sewing position P2 to be applied, as shown by an imaginary line in FIG. 1, with the arrow Y in FIG. 1, with the sewing position P2 positioned below the needle of the two-needle sewing machine 2 on the sewing table T interposed therebetween. 1 between the set position P1 located upstream in the sewing direction shown and the corner knife position P3 located downstream in the sewing direction shown by a solid line in FIG. 1 so as to be able to reciprocate and move up and down along the sewing direction. Has been.
[0022]
Each cloth presser portion 5 is provided with a ball cloth presser portion 7 that has both functions of holding and folding the ball edge cloth K. With a driving force of an actuator such as a cylinder, it is arranged to be individually movable in a direction orthogonal to the sewing direction. That is, both the ball edge cloth presser portions 7 are formed so as to be freely movable with respect to a presser foot 8 described later.
[0023]
  The ball edge cloth folding device4Has a presser foot 8 having an inverted T-shaped cross section, which includes a horizontal portion 8a and a vertical portion 8b that can be lowered onto the ball cloth K at the set position P1. The presser foot 8 is disposed so as to be movable up and down by a driving force of an actuator such as an air cylinder (not shown). Further, as shown in FIG. 3, a pair of beaded cloth guides 9 are disposed substantially in parallel at a predetermined interval across the vertical portion 8b on the front end side of the presser foot 8 in the sewing direction. .
[0024]
At the sewing position P1, a center knife 10 is disposed so as to be movable up and down, and at the corner knife position P3, two corner knife 11 are disposed so as to be movable up and down at intervals in the sewing direction.
[0025]
As shown in FIG. 4, the control means 15 that controls the operation of the apparatus has at least a CPU 16 and a memory 17 formed of ROM, RAM, or the like having an appropriate capacity. The control means 15 is electrically connected to a cloth feed motor 6, an operation panel 18, a sewing machine driving motor 19 for driving the two-needle sewing machine 2, various switches (not shown) such as a power switch and a sewing start switch. It is connected to the.
[0026]
As shown in FIGS. 5 and 6, the operation panel 18 includes at least a display means 21, a display item selection means 22, an input means 23, a reset switch 24, a ready switch 25, a ready indicator lamp 26, and the like. Has been.
[0027]
The display means 21 is formed by, for example, a touch panel, and the display unit 21A has an initial screen such as when the power is turned on shown in FIG. 5 and an input (setting) and change such as an idle feed speed shown in FIG. , And a detail screen on which selection can be performed can be switched.
[0028]
On the one initial screen, as shown in FIG. 5, a pattern number pictorial symbol 21a representing the type of sewing pattern such as back tack stitching and condensation stitching, a pictorial symbol 21b representing the sewing pattern, and the like can be displayed. An error display is made possible. The pictogram 21b of the present embodiment is configured so that the sewing length value can be displayed together.
[0029]
On the other detailed screen, as shown in FIG. 6, various kinds of sewing such as a pattern number pictogram 21a representing the type of the sewing pattern and a pictorial symbol 21c representing at least the blank feed speed at the time of blank feed are executed. Sewing data necessary for sewing can be displayed.
[0030]
In addition, the items to be displayed on the initial screen and the detailed screen may be set according to the design concept and the like, and are not particularly limited to the configuration of the present embodiment.
[0031]
Furthermore, the display means 21 is configured so that the picture display portion of the item selected by the display item selection means 22 can be easily visually recognized by blinking or the like.
[0032]
The display item selection means 22 is used for switching display items displayed on the display means 21, and has four direction keys 22a arranged in a cross shape. Each time the upward direction key 22a is pressed once, the display part blinkingly displayed on the display means 21 moves to the display part of the next adjacent item, and every time the right direction key 22a is pressed once. The display part blinking on the display means 21 moves to the display part of the item adjacent to the right, and the display part blinking on the display means 21 each time the downward direction key 22a is pressed once. Moves to the display part of the item adjacent to the lower side, and each time the left direction key 22a is pressed, the display part blinking on the display means 21 moves to the display part of the item adjacent to the left. It is supposed to be. Furthermore, the display item selection means 22 of this embodiment is used also when inputting the idle feed speed according to the kind of ball edge cloth so that it may mention later.
[0033]
The input means 23 has a total of twelve input keys 23a including numerical keys 0 to 9 and + and-symbol keys used when inputting at least the idle feed speed.
[0034]
As will be described later, the input unit 23 of the present embodiment also has a function as a selection unit 27 that selects a sewing pattern necessary for a sewing operation to be executed from a plurality of sewing patterns stored in the memory 17. .
[0035]
The preparation completion switch 25 is used by being turned on when executing a sewing operation.
[0036]
The ready indicator 26 is lit when the ready switch 25 is turned on so that the operator can easily see the ready state. In this embodiment, the ready indicator lamp 26 is formed by an LED. Has been.
[0037]
Returning to FIG. 4, the memory 17 has at least a sewing pattern storage unit 31 and a program storage unit 32.
[0038]
On the other hand, the sewing pattern storage unit 31 stores data necessary for sewing such as a pattern number in which a plurality of sewing patterns indicate the type of the sewing pattern, and an idle feed speed corresponding to the type of the ball edge cloth K. That is, the sewing pattern storage unit 31 stores the blank feed speed of the presser foot 5 according to the type of the ball edge cloth K as a part of the sewing pattern for each sewing pattern. In the present embodiment, a plurality of sewing patterns are stored in advance together with pattern numbers.
[0039]
  The other program storage unit 32 stores sewing programs as various control programs for controlling the operation of the sewing machine. The sewing program stored in the program storage unit 32 has a presser foot with an idle feed speed set by an input from the operation panel 18 or an idle feed speed selected from the operation panel 18 when executing a sewing operation. The portion 5 is controlled to be fed from the set position P1 to the sewing position P2, and more specifically, the rotational speed of the cloth feed motor 6 is controlled according to the type of the ball cloth K.RuOf the knit fabric KWaist strengthDepending on the type, it is possible to input an appropriate idle feed speed and automatically execute sewing of the selected sewing pattern. That is, it is important to use the cloth feed motor 6 that can control the rotation speed in order to smoothly and variably control the movement speed of the cloth presser 5.
[0040]
Each of the storage units 94 and 95 can be composed of areas having different addresses of one element or can be composed of individual elements.
[0041]
Next, the operation of the present embodiment having the above-described configuration will be described.
[0042]
The edge stitch sewing machine 1 according to the present embodiment first performs data input (setting) or selection of an idle feed speed prior to sewing.
[0043]
Here, an example of the data input of the idle feed speed by the configuration of the control means 15 and the operation panel 18 described above will be described with reference to the flowchart shown in FIG.
[0044]
As shown in FIG. 7, the data input of the idle feed speed in this embodiment is started by turning on the power by turning on a power switch (not shown). Then, in step ST01, it is determined whether or not to change the pattern number representing the type of the sewing pattern on the initial screen displayed on the display unit 21A of the display means 21 of the operation panel 18 shown in FIG.
[0045]
Note that the pattern number on the initial screen may always be displayed as the pattern number, or it may be the pattern number that was selected when the power was last turned off. It can be set according to.
[0046]
If the determination in step ST01 is NO (the pattern number is not changed), the process proceeds to step ST02, in which it is determined whether or not the ready switch 91 is ON, and the determination in step ST02 is NO (the ready switch 91 is OFF). ), The process waits until the determination in step ST02 becomes YES. If the determination in step ST02 is YES, the process proceeds to step ST03 and enters the execution mode of the sewing operation with the displayed pattern.
[0047]
When the preparation completion switch 25 is ON, the preparation completion indicator lamp 26 is lit. Execution of the sewing operation is started by turning on a sewing start switch (not shown).
[0048]
If the determination in step ST01 is YES (changing the sewing pattern), the process proceeds to step ST04 and whether the pattern number (picture symbol 21a) to be changed is being displayed on the display unit 21A of the display means 21 of the operation panel 18 If the determination in step ST04 is NO (the pattern number to be changed is not displayed), the process proceeds to step ST05 and the input key 89a on the operation panel 18 is operated to set the desired pattern number. Input and return to step ST04.
[0049]
If the determination in step ST04 is YES (the pattern number to be changed is being displayed), the process proceeds to the next step ST06, where the display on the display unit 21A of the display means 21 of the operation panel 18 is set as a detailed screen. Proceed to step ST07.
[0050]
  The initial screen is switched to the detailed screen, for example, the display item selection means22Down arrow key22aThis is done by operating.
[0051]
In addition, when it is set as the detailed screen in step ST06, the sewing data according to a pattern number is displayed with a pictorial symbol.
[0052]
That is, the input means 23 for inputting a pattern number also functions as a selection means 27 that can select a sewing pattern necessary for a sewing operation to be executed from a plurality of sewing patterns stored in the memory 17.
[0053]
Next, in step ST07, it is determined whether or not the needle feed data input is completed. If YES (data input is completed), the process returns to step ST02.
[0054]
If the determination in step ST07 is NO (data input is executed), the process proceeds to the next step ST08 until the determination in step ST07 becomes YES, and the data input mode for the idle feed speed is executed.
[0055]
Here, a specific example of the data input mode of the idle feed speed will be described.
[0056]
The setting for inputting the data of the pre-feed speed is a pictorial symbol 21a having a pattern number representing a sewing pattern corresponding to the type of the rim cloth K to be sewn from now on, for example, the numerical value 1 in the detailed screen shown in FIG. Is displayed, the direction key 22a of the display item selection means 22 is operated to select and blink the pictorial symbol 21c representing the idle feed speed.
[0057]
Next, with the pictogram 21c blinking, the input key 23a of the input means 23 is operated to input the pre-feed speed corresponding to the type of the ball cloth K. In this case, the CPU 16 calculates the rotational speed of the cloth feed motor 6 as the idle feed speed corresponding to the input numerical value based on the control program, and obtains the input numerical feed speed of the cloth feed motor 6. Set the rotation speed.
[0058]
The input of the idle feed speed may be the numerical value of the idle feed speed itself. However, the idle feed speed is classified into 10 stages, for example, the slower one is 1 and the fastest is 10. It is preferable that the numerical value corresponding to each section is input with the input key 23a in the sense that the idle feed speed can be input easily and easily. In this case, sewing data having a data table of the relationship between the input numerical value of 1 to 10 and the rotational speed of the cloth feed motor 6 as the idle feed speed corresponding to this numerical value is stored in the memory 17 and input. The rotation speed of the cloth feed motor 6 may be set from the numerical values of 1 to 10.
[0059]
The idle feed speed input by the above operation is stored in the sewing pattern storage unit 31 of the memory 31 together with the sewing pattern number.
[0060]
Further, as data input, not only the idle feed speed but also various directional symbols (not shown) displayed on the detailed screen are selected by operating the direction key 22a of the display item selection means 22 and corresponding to the selected dimensional symbols. By inputting the value by operating the input key 23a of the input means 23, for example, the number of stitches necessary for forming the stitch, the stitch pitch, and the like can be input.
[0061]
In the present embodiment, on the detailed screen, the data stored in advance in the sewing pattern storage unit 31 together with the pattern number is displayed together with the pictogram on the detailed screen. By inputting the data, the sewing pattern storage unit The data stored in 31 is overwritten and changed. Therefore, when executing new data input, select a new pattern number that does not store all data on the initial screen, or select a pattern number that does not store only the data of the feed rate. Good.
[0062]
  And after setting the to-be-sewn cloth W at the set position P1 on the sewing table T at a predetermined angle, the cloth presser portion 5 which is lifted at the set position P1 and is waiting is lowered and pressed. Is set at a predetermined position on the cloth W, and the cloth is set. After that, waiting above the set positionBall edge cloth folding device 4Cloth presser foot8Is lowered and the ball edge cloth K is pressed from above, and both the ball edge cloth presser portions 7 are projected in a direction perpendicular to the sewing direction so as to approach the vertical portion 8b of the presser foot 8, The cloth K is sandwiched in an inverted T-shaped cross section. FIG. 8 shows a schematic perspective view of the ball edge cloth K held in an inverted T-shaped cross section. Moreover, the schematic sectional drawing of the state which pinched the ball edge cloth K in the cross-section inverted T character shape is shown in FIG.
[0063]
  Then, the ball edge cloth K is overlapped on the cloth W, and the ball edge cloth K is cross-sectionally inverted T-shaped.InWhile being held, the cloth feed motor 6 is driven to leave the cloth presser foot 8 at the set position P1, and the cloth presser 5 and the ball cloth presser 7 together with the cloth pressers 5 and 2 from the set position P1. The sewing machine 2 is preliminarily fed to a sewing position P2 below the needle 2 of the main sewing machine 2 with a preset or selected pre-feeding speed. Thereafter, the sewing machine driving motor 19 is driven to execute a predetermined pattern of sewing to form a seam. Simultaneously with the start of sewing, the gap between the stitches by the needles N is cut open by the rising of the center knife 10 to form a bead hole.
[0064]
Next, the cloths W and K that have been sewn and cut at the sewing position P2 move to the corner knife position P3, and when the corner knife 11 rises, both ends along the sewing direction of the edge hole have a wedge shape or the like. The formation of the bead is completed by forming a cut in the shape.
[0065]
  As described above, according to the edge stitch sewing machine 1 of the present embodiment, the idle feed speed during the idle feed is set toSanoSince it can be controlled according to the type,If the waist of the ball edge fabric is weak,The bead K is bent or the upright part Ka of the bead K is caught by the bead presser 7End upThe gap between the vertical part 8b of the presser foot 8 and the ball edge cloth guides 9 and 9 cannot be surely and smoothly passed.ThatInconvenience can be reliably prevented.That is, even when the waist is weak depending on the type of the ball edge cloth, the gap can be smoothly passed.Therefore, the ball edge cloth K can be reliably moved to the sewing position P2 under the needle without any problem at the time of idle feeding regardless of the type of the ball edge cloth K.
[0066]
  Ie,ballWhen the waist of the edge cloth K is weak, it is possible to easily maintain the posture of the upright portion Ka of the ball edge cloth K by slowing the idle feeding speed at the time of idle feeding.
[0067]
  Further, according to the edge stitch sewing machine 1 of the present embodiment, the idle feed speed can be arbitrarily set by the input means 23, and an appropriate idle feed speed can be set according to the type of the ball edge cloth K..
[0068]
Furthermore, according to the edge stitch sewing machine 1 of the present embodiment, by performing a simple operation of operating the selection means 27, the idle feed speed of the ball edge cloth K corresponding to the type of the sewing pattern is automatically set. The sewing of the selected sewing pattern can be automatically executed.
[0069]
In addition, this invention is not limited to the said embodiment, A various change can be made as needed.
[0070]
【The invention's effect】
  As described above, according to the edge stitch sewing machine of the present invention according to claim 1, the idle feed speed at the time of idle feed is set toWaist strengthSince it can be controlled according to the type,If the waist of the ball edge fabric is weak during empty feeding, the upright part of the ball edge fabric will be caught by the ball edge fabric retainer, ensuring a gap between the vertical part of the work clamp foot and the ball edge fabric guide. And the inconvenience that it cannot pass smoothly can be prevented reliably. That is, even when the waist is weak depending on the type of the ball edge cloth, the gap can be smoothly passed. Therefore,During idle feeding, the ball edge fabric can be reliably moved to the sewing position under the needle regardless of the type of the ball edge fabric.
[0071]
Moreover, according to the ball stitch sewing machine of the present invention according to claim 2, the idle feed speed can be arbitrarily set by the input means, and an appropriate idle feed speed can be set according to the type of the ball edge cloth. Very effective.
[0072]
In addition, according to the ball stitch sewing machine of the present invention according to claim 3, by performing a simple operation of operating the selection means, the idle feed speed of the ball cloth according to the type of the sewing pattern is automatically set. It is possible to set, and there is an extremely excellent effect that sewing of the selected sewing pattern can be automatically executed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of an overall configuration of an embodiment of a bead stitch sewing machine according to the present invention.
FIG. 2 is a front view of a main part of the edge stitch sewing machine of FIG.
FIG. 3 is a perspective view showing a main part of the bead cloth folding device of the bead stitching sewing machine of FIG. 1;
4 is a block diagram showing a control system of the edge stitch sewing machine of FIG. 1. FIG.
5 is a plan view showing an essential part of an operation panel of the edge stitch sewing machine of FIG. 1 together with an initial screen.
6 is a plan view showing the main part of the operation panel of the edge stitch sewing machine of FIG. 1 together with a detailed screen.
FIG. 7 is a flowchart showing an example of data input of the idle feed speed of the edge stitch sewing machine of FIG. 1;
8 is a schematic perspective view showing a state in which the ball edge fabric in the ball edge stitching machine of FIG. 1 is clamped in an inverted T-shaped cross section.
FIG. 9 is a schematic longitudinal sectional view of FIG.
[Explanation of symbols]
1 Sewing machine
2 Two-needle sewing machine
3 Cloth feeder
4 Ball edge folding device
5 Work clamp part
6 Cloth feed motor
7 Ball edge cloth presser
8 Work clamp foot
9 Jade edge cloth guide
15 Control means
16 CPU
17 memory
18 Operation panel
19 Sewing machine drive motor
21 Display means
21A Display section
21a, 21b, 21c
22 Display item selection means
22a Direction key
23 Input means
23a Input key
27 Selection means
31 Sewing pattern memory
32 Program storage
N needle
W cloth sewing cloth
K ball edge fabric
T Sewing table
P1 set position
P2 Sewing position
P3 Corner knife position

Claims (1)

A cloth presser portion that holds the ball cloth on the cloth to be sewn is held, and the cloth presser portion is sewn to both cloths from the set position at which the two cloths are set by the driving force of the cloth feed motor. It controls the cloth feeding device that can move to the sewing position, the bead fabric folding device that has the presser foot having a reverse T-shaped cross section that can be lowered onto the bead fabric at the set position, and controls the operation of each part. Control means, and the cloth feed motor is driven in a state where the ball cloth is bent in an inverted T shape along the cloth presser foot on the cloth to be sewn at the set position to move both cloths from the set position. In the edge stitch sewing machine that feeds to the sewing position,
The cloth feed motor is a control motor capable of controlling the rotation speed,
The control means is configured to control the rotational speed of the cloth feed motor in order to control the movement speed of the cloth presser, and to slow down at least the idle feed speed during the idle feed of the cloth presser. An edge stitch sewing machine characterized by that.

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