KR20020092795A - Sewing machine and control method thereof - Google Patents

Abstract

PURPOSE: To reduce troubles by shortening the time required for recovering yarn breakage. CONSTITUTION: This control method for a sewing machine controls the sewing machine in which the end part of a table for placing a sewing frame is provide with a recessed part allowing a worker to enter. The control method comprises steps (step S101, S103) of retreating the sewing frame from the upper side of the recessed part when the sewing frame is positioned on the upper side of the recessed part at the time of detecting yarn breakage to stop the drive of the sewing frame. The sewing machine has a plurality of sewing machine heads, and comprises a step (step S102) of cutting a yarn by the sewing machine head having not yarn breakage before the retreating step, and a step (step S106) of returning the sewing frame to the position before retreating in restarting embroidery processing from the state of stopping the embroidery process through the retreating step.

Description

Sewing machine and its control method {SEWING MACHINE AND CONTROL METHOD THEREOF}

The present invention relates to a sewing machine provided with a recess into which an operator can enter at an end of a table on which a sewing machine is placed, and a control method thereof. In addition, in a sewing machine, since the left and right directions are conventionally referred to as the X direction (or the V direction) and the front and rear direction are referred to as the Y direction (or the H direction), the present specification also applies thereto.

In a multi-head sewing machine having a large inner (Y direction) dimension of a table on which a sewing machine is placed, the distance from the end of the table to the sewing machine head is spaced, so that the thread is exchanged and the thread is broken. Maintenance work, etc. becomes difficult etc. For this reason, like the sewing machine 50 shown in FIG. 5, the worker (H) is provided in the front end part of the table 52 so that the worker H may approach the sewing machine head 51 at the time of work | work. The recessed part 53 into which H) can enter is provided.

By the way, when thread break | fever generate | occur | produces and drive of the sewing machine 54 is stopped automatically, as shown in FIG. 5, the sewing machine 54 is located above the recessed part 53, and the worker H is recessed. There may be times when the part 53 cannot be entered. At this time, the worker H first cuts the thread in the sewing machine head 51 which is not thread broken by manual operation, and retracts the sewing frame 54 from the upper side of the recess 53 by manual operation. I'm letting you. Then, the thread 53 enters the recess 53 and the thread is passed through the sewing machine head 51 which has been thread broken. After that, the sewing frame 54 is returned to its original position by manual operation, and the sewing frame processing is resumed. In this way, if the sewing frame 54 is located above the recess 53 at the time of thread breakage, there is a problem that the restoration work of thread breakage takes time and the product takes up.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sewing machine and a control method thereof which can solve the above problems, reduce the time for restoring thread breaks, and reduce the number of articles.

1 is a plan view of a sewing machine using a control method according to an embodiment of the present invention,

2 is a plan view showing another state of the sewing machine;

3 is a block diagram showing a control system of the sewing machine;

4 is a flowchart showing the flow of thread breaking processing of the sewing machine, and

5 is a plan view showing a conventional sewing machine.

(Explanation of the sign)

1: embroidery sewing machine 4: table

4a: recess 5: sewing frame

7: frame drive mechanism 8: sewing machine head

22: thread break detection device 23: thread cutting device

S100: Thread Break H: Worker

In order to achieve the above object, the control method of the sewing machine of the present invention is a control method of the sewing machine having a recess into which the operator can enter at the end of the table on which the sewing machine is placed. When the sewing frame is located above the concave portion when it is to be stopped, the step includes causing the sewing frame to retract from the upper side of the concave portion.

The sewing machine is a multi-head sewing machine having a plurality of sewing machine heads, and may include a state including cutting a thread in a sewing machine head that is not broken before the step of evacuating.

In the case where the sewing process is restarted from the state in which the sewing process is stopped through the evacuation step, a state including the step of returning the sewing frame to the position before the evacuation before the restart is made. Can be illustrated.

The position where the said recessed part is provided is not specifically limited if it is an edge part of a table, but illustrates the state provided in the front side, the back side, the right side, or the left side of a table.

In addition, the sewing machine of the present invention is a sewing machine provided with a table provided with a recess into which an operator can enter at an end, a sewing frame placed on the table, and a shuttle driving device for driving the sewing machine. When the thread breakage is detected by the thread breakage detection device and the thread breakage detection device, when the sewing frame is located above the concave portion, the frame drive mechanism is configured to retract the sewing frame from the upper side of the concave portion. It is provided with a control unit to operate.

The sewing machine is a multi-head sewing machine having a plurality of sewing machine heads, and each sewing machine head is provided with a thread cutting device together with the thread break detection device, and the control unit is not thread broken before the sewing machine is evacuated. It can be exemplified a state that is configured to cut the thread by the thread cutting device in the non-sewing machine head,

The thread cutting device may illustrate a state embedded in a bed installed at a position directly below the sewing machine head.

When the control unit causes the sewing frame to be retracted and causes the sewing process to be restarted from the state in which the sewing processing is stopped, the control unit returns to the position before the sewing frame to be retracted before the restart. It can illustrate the state made into the structure which makes the said frame drive mechanism operate so that it may rotate.

The recessed portion can exemplify a state provided at an end of the front side, the rear side, the right side, or the left side of the table.

The recess is provided at the front end and the rear end of the table, and the control unit is the front end of the sewing frame when the sewing frame is located above either of the recess at the front end or the recess at the rear end. The state which made the said structure drive mechanism operate so that it may retract in the place which is not located above both the recessed part of the recessed part or the recessed part of a rear end part is mentioned.

The recess is provided at the front end and the rear end of the table, and the control unit is the front end of the sewing frame when the sewing frame is located above either of the recess at the front end or the recess at the rear end. The state which made it the structure which makes the said frame drive mechanism operate so that it may retract in the place which is not located above one of the recessed part of the recessed part or the recessed part of a rear end part can be illustrated.

The state which set the inner length of the said recessed part to 0.2-1 m can be illustrated.

The state which set the width | variety of the said recessed part to 0.6 m or more can be illustrated.

Embodiment of the Invention

EMBODIMENT OF THE INVENTION The sewing machine of one Embodiment which actualized this invention, and its control method are demonstrated with reference to drawings. First and FIG. 2 is a plan view showing a multi-head embroidery sewing frame 1 using the control method of the present invention. The embroidery frame 1 is supported by a pair of left and right struts 2 standing on the floor, and a lower frame (not shown) and an upper frame which are supported between the lower part and the upper part of the two struts 2 and extend in the left and right directions, respectively. It has a machine frame which consists of (3), and the said lower frame is supported substantially horizontally on the table 4. On the table 4, the sewing frame 5 of the shape of a flat horizontal length quadrangular frame is mounted, The drive body 6 is coupled to the short sides of the left and right both sides of the frame 5, respectively, and the X-direction drive mechanism 7a of the frame drive mechanism 7 provided below the table 4, respectively. The sewing frame 5 is driven in the X direction through the driving body 6 and the sewing frame 7b is driven by the Y-direction driving mechanism 7b of the frame driving mechanism 7 provided below the table 4. (5) is driven in the Y direction, and a plurality of sewing machine heads (8) are disposed on the front and rear surfaces of the upper frame (3). Are arranged in rows at predetermined intervals, and a plurality of beds 9 are arranged in the lower frame in rows at approximately the same height as the table 4 at a position just below each sewing machine head 8. As noted, Sewing is performed on the processing tool spread and hold | maintained widely in the sewing frame 5 by the cooperation of the needle which reciprocates up and down by the sewing machine head 8, and the pot rotated and driven by the bed 9.

The table 4 is provided with the recessed part 4a which the worker H can enter in the front end part. The size of the concave portion 4a is not particularly limited. For example, when the width in the Y direction of the embroidery sewing machine 1 is about 3.5 m and the width in the Y direction of the sewing frame 5 is about 1.6 m. The case where the inner length of the recessed part 4a is set to 0.2-1m, respectively, More preferably, it is 0.3-0.9m can be illustrated. In addition, the width of the concave portion 4a is not particularly limited, but it is preferable to set the width of the concave portion 4a so that the worker H of at least an average body shape can enter and exit comfortably in the Y direction, for example, 0.6 m or more, More preferably, setting to 0.9 m or more can be illustrated.

3 is a block diagram showing a configuration of a part related to the control method of the embroidery sewing machine 1. The embroidery sewing machine 1 is provided with the control part 20 which incorporated the microprocessor (not shown) as shown to the same figure. The control unit 20 is provided in the operation panel 21, each inner frame head 8, and a thread break detection device 22 for detecting thread breaks, and the upper thread and / or built in each bed 9. Thread cutting device 23 for cutting the lower thread, X-direction drive mechanism 7a and Y-direction drive mechanism 7b of frame drive mechanism 7 for driving sewing machine 5, and sewing machine head 8 The upper shaft drive mechanism 24 for vertically driving the needle of the needle, and the lower shaft drive mechanism 25 for rotationally driving the pot which cooperates with this needle are connected. The control unit 20 stores a control program including embroidery processing (not shown) or thread cutting processing (step S100) described later, a work area used by the control program, and various information including embroidery data. A storage unit 27 is provided. In the work area, information for embroidery processing, coordinates of the sewing frame 5 before execution of the thread breaking process described later, and the like are stored. The control unit 20 is operated in accordance with the control program, and controls the respective mechanisms so as to form the embroidery pattern represented by the embroidery data into a workpiece.

Next, the processing contents in the control unit 20 will be described. First, the embroidery processing will be described. In this processing, the upper shaft driving mechanism 24 and the lower shaft driving mechanism 25 are operated, and in synchronization with these mechanisms, the sewing frame for each needle is made from the embroidery data. Embroidery processing is performed by reading the positional information of (5) and driving the sewing frame 5 by the frame driving mechanism 7. During thread processing, if thread break is detected by the thread break detection device 22, the upper shaft drive mechanism 24 and the lower shaft drive mechanism 25 are stopped to call the thread break processing (step S100). do. When the thread breaking process (step S100) is finished, the upper shaft drive mechanism 24 and the lower shaft drive mechanism 25 are operated again, and the frame drive mechanism 7 is operated in synchronization with them to embroider. It is supposed to resume processing.

Subsequently, the yarn breaking process (step S100) will be described with reference to the flowchart shown in FIG. In this process, first, it is checked whether the sewing frame 5 is located above the recessed part 4a (step S101). And when it is not located above the recessed part 4a, it progresses to step S104 immediately. Moreover, when located above the recessed part 4a, the thread cutting device 23 is operated in the whole sewing machine head 8, and the upper thread and the lower thread are cut | disconnected (step S102), and the present The positional information of the sewing frame 5 is stored in the working area of the storage unit 27, the frame drive mechanism 7 is operated to allow the sewing frame 5 to be retracted from the upper side of the recess 4a ( The flow advances to step S103 and step S104.

Subsequently, in step S104, an instruction to restart the embroidery processing is waited until input from the operation panel 21 is input. Here, before inputting the instruction to start again, the worker H performs the thread passing operation at the sewing machine head 8 in which the thread break has occurred, or, if necessary, the embroidery before the thread break occurs by manual operation. The stitch back may be stitched up to the machining position (the stitch back may be configured to be automatically performed by the embroidery sewing machine 1).

By the way, when the instruction to start again by the operator is input (step S104), for example, by checking whether or not the positional information of the sewing frame 5 before retraction is stored in the work area, the sewing frame 5 ) Is checked for retirement (step S105). Then, when retracting, the frame driving mechanism 7 is operated on the basis of the positional information of the sewing frame 5 before retraction to return to the position before retracting the sewing frame 5 (step S106). ). Then, the processing returns to the embroidery processing which is the call origin of this processing (step S108).

In addition, in step S103, as a position of the evacuation line of the sewing frame 5, if the sewing frame 5 is a position which is not located in the upper side of the recessed part 4a, it will not specifically limit, for example As an example, the machine origin of the drive mechanism 7 and the position set on the operation panel 21 are illustrated.

According to the sewing machine and the control method of the present invention as described above, when the sewing frame 5 is located above the recess 4a when the thread break is detected and the drive of the sewing frame 5 is to be stopped. And the step (steps S101 and 103) of causing the sewing frame 5 to be retracted from the upper side of the recess 4a, the sewing frame 5 when the sewing frame 5 interferes with the thread passing operation. ), And the width of the product can be reduced. On the other hand, when the sewing frame 5 is not retracted when it does not interfere, the amount of time that does not operate the frame can be started immediately. The time efficiency is good.

In addition, the sewing machine head (not to be cut off) is included, as it includes a step of cutting the thread (step S102) from the sewing machine head 8 that is not cut off before the steps (S101 and 103). The thread of 8) can be reliably cut and the width of the thread can be reduced, so that the thread of the sewing machine head 8 is placed on the fabric, without forgetting to perform the thread cutting operation on the sewing machine head 8, which is not broken. The worker H does not fail to move the sewing frame 5 as it is, and loosen the thread extra.

When the embroidery processing is restarted from the state in which the embroidery processing is stopped through the step of retracting (steps S101 and S103), the sewing frame 5 is retracted before the restarting is started again. Since it includes the step (step S106) of returning to the position before making it work, the work of returning the sewing frame 5 to the original position is no longer forgotten, and the width of the work is reduced. Can be.

In addition, this invention is not limited to the said embodiment, For example, it can also be changed suitably in the range which does not deviate from the meaning of invention as follows.

(1) For example, as shown by the dashed-dotted line in FIG. 2, the control method of this invention is applied to the sewing machine in which the recessed part 4b which an operator H can enter is provided also in the rear end part of the table 4. FIG. To use. In this case, it is determined in step S101 whether the sewing frame 5 is located above which of the recessed portion 4a or recessed portion 4b. Moreover, in step S103, the place which is not located above any of the recessed part 4a and the recessed part 4b, the place which is not located above the recessed part 4a or the recessed part 4b, etc. It is made to retract the bar (5).

(2) Use the control method of the present invention in a sewing machine having a single sewing machine head (8). In this case, step S102 can be eliminated.

According to the sewing machine and the control method of the present invention, it is possible to shorten the time for restoring the thread break and at the same time reduce the number of articles.

Claims (12)

A control method of a sewing machine having a recess into which an operator can enter at an end of a table on which a sewing frame is placed, And when the sewing frame is located above the concave portion when the thread break is detected and the drive of the sewing frame is to be stopped, the step of causing the sewing frame to be retracted from the upper side of the concave portion. Control method of sewing machine. The sewing machine according to claim 1, wherein the sewing machine is a multi-head sewing machine having a plurality of sewing machine heads, and the cutting machine comprises cutting a thread in a sewing machine head which is not broken before the step of retracting the sewing machine. Control method. The method of claim 1 or 2, wherein when the sewing process is restarted from the state in which the sewing process is stopped through the step of retracting, causing the sewing frame to be retracted before the restarting of the sewing process. Control method of a sewing machine comprising the step of returning to the previous position. In a sewing machine comprising a table provided with a recess into which an operator can enter, an sewing frame placed on the table, and a mold driving device for driving the sewing frame, When the thread break is detected by the thread detection device and the thread break detection device, the sewing frame is located above the recess, when the thread break is detected, the sewing frame is retracted from the upper side of the recess. Sewing machine comprising a control unit for operating the frame drive mechanism. The sewing machine according to claim 4, wherein the sewing machine is a multi-head sewing machine having a plurality of sewing machine heads, and each sewing machine head includes a thread cutting device together with the thread break detection device, and the control unit is configured to retract the sewing machine. Sewing machine characterized in that the configuration to allow the thread to be cut by the thread cutting device in the sewing machine head that is not previously broken. The sewing machine according to claim 5, wherein the thread cutting device is embedded in a bed installed at a position directly below the sewing machine head. 7. The control unit according to any one of claims 4 to 6, wherein when the control unit causes the sewing frame to be retracted and causes the sewing process to be restarted in a state in which the sewing processing is stopped, the control unit starts before the restart. And the shuttle drive mechanism is operable to return the sewing frame to a position prior to the evacuation. The sewing machine according to claim 4, wherein the recess is provided at an end of a front side, a rear side, a right side, or a left side of the table. The said concave part is provided in the front end part and the back end part of the said table, The said control part is a case where the said sewing frame is located in any one upper side of the recess part of the front end part, or the recess part of a rear end part, A sewing machine, characterized in that the sewing drive mechanism is operated to retract the sewing machine to a place which is not located above both of the recesses of the front end portion or the recesses of the rear end portion. The said concave part is provided in the front end part and the back end part of the said table, The said control part is a case where the said sewing frame is located in any one upper side of the recess part of the front end part, or the recess part of a rear end part, A sewing machine characterized in that the sewing drive mechanism is operated so that the sewing machine is evacuated to a place which is not located above one of the recesses at the front ends or the recesses at the rear ends. The sewing machine according to any one of claims 4 to 6 and 8 to 10, wherein an inner length of the concave portion is set to 0.2 to 1 m. The sewing machine according to any one of claims 4 to 6 and 8 to 10, wherein the width of the concave portion is set to 0.6 m or more.