KR100822504B1 - A sewing machine for overlocking botton holes - Google Patents

Abstract

It is a subject to provide the button sewing machine which can improve the workability of button sewing machine sewing.

As a means for solving this problem, the button knitting sewing machine 20 according to the present invention has a cloth pressing portion 70 for pressing the sewing object, and pressing driving means for driving the cloth pressing portion (cloth pressing cylinder 86, X-axis motor ( 82), the Y-axis motor 83), a movable member (mass support 51 or cloth cutting scalpel 52) which is detachably attached to the sewing machine arm 33 and capable of shangdong movement, and the push driving means. Control means (CPU 13) for controlling the driving is provided. In addition, when the movable member is detached from the lifted position, the control means controls the driving of the push driving means to move the cloth presser to a position away from the movable member. Done.

Description

Button sewing machine sewing machine {A SEWING MACHINE FOR OVERLOCKING BOTTON HOLES}

The present invention relates to a button sewing machine for forming a buttonhole and at the same time forming a needle sewing on the periphery of the button hole.

A sewing machine (button sewing machine), which forms a button sewing sewing machine by arranging a series of sewing stitches around the button hole by arranging a straight or so-called eyelet-shaped incision groove (bow hole) on a cloth to be sewing. Is known.

The sewing machine is usually movable to any position in the horizontal plane with a pair of cloth cutting scalpels and a scalpel and the sewing object placed on the upper surface to be placed in the position to insert the sewing object in the vertical direction to form a buttonhole in the sewing object. At the same time, the fabric feeder and the material to be pressed are pressed on the upper surface of the fabric feeder, and a fabric presser which integrally moves with the fabric feeder is provided.

As shown in Fig. 9, the cloth pressing portion 100 includes a pressing arm 101 and a pressing foot 102 disposed on one end side of the pressing arm. The other end of the pusher 101 is connected to the air cylinder 105 under the transfer carriage 104 via several connecting members 103, and the pusher foot is driven by driving the air cylinder 105. 102 can be moved in a substantially vertical direction.

Then, in the state in which the sewing object is fixed on the cloth carrier 104 by the cloth pressing part 100, for example, one of the scalpel attached to the sewing machine arm side and the cloth cutting blade toward the other side attached to the sewing machine main body side. By lowering, it becomes a structure which forms a buttonhole in the to-be-sealed | blocked material.

In recent years, a button cutting sewing machine having a configuration in which the driving of the mesothelial or the cloth cutting blade is performed by a motor such as a pulse motor in place of an actuator such as a conventional solenoid is also known.

Moreover, in the button sewing machine which can form eyelet sewing, a sewing machine is known that forms needle sewing while turning needle bars when forming a sewing seam around the eyelet part, but in such a sewing machine, the sewing thread is replaced. In this case, by using the needle bar turning function, an operation means for turning the needle insertion direction of the needle hole toward the operator side is provided, and the operator rotates the needle during the replacement of the sewing thread by operating the operation means. All.

However, in general, the cloth presser is placed at the position where the cloth cutting knife or the mess receiver is fitted from both the left and right sides thereof. There was a problem of lowering the efficiency.

In addition, in the sewing machine configured to drive the scalpel or the cloth cutting blade by the cloth cutting motor, the cloth cutting motor is energized even when the mesh tray or the cloth cutting blade in the ascending position is energized, so that the power source of the sewing machine is not cut. This was also a cause of deterioration of the replacement work since it was not possible to manually move the measuring blade or the cloth cutting blade to confirm the mounting position.

In addition, when changing the sewing thread, besides the method of passing the tip of the new sewing thread through the hole of the needle, for example, the thread thread from the threading part to the needle with the sewing thread used so far through the needle hole of the sewing needle There is a method of changing the sewing thread by cutting a new part through the needle hole by cutting near the part and tying the cut part with a new sewing thread and pulling the other end of the cut part of the thread used up to that point. However, since the needle bar turning used when replacing the sewing thread conventionally only turns the needle bar so that the thread insertion direction of the needle hole is toward the worker side, the situation is good when the thread is changed by the former method, but the thread is removed by the latter method. When changing, the thread had to be pulled in the opposite direction from the worker, so the workability was extremely poor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a button sewing machine which can improve the workability of a button sewing machine in consideration of the above circumstances.

In order to solve the above problems, the button sewing machine sewing machine 20 is a needle bar 40 to move shanghai while supporting the sewing needle 41, and an electrically driven push drive means (cloth push cylinder 86), The cloth pressing part 70 which is arrange | positioned so that it can move to an up-down direction and a horizontal direction by the X-axis motor 82 and the Y-axis motor 83, and presses in the vicinity of the sewing position of the to-be-sealed object in a lowered position, and a sewing machine arm With the cloth cutting means 50 which can form a buttonhole in the to-be-sealed object by lowering the movable member (the receiving tray 51 or the cloth cutting blade 52) which is detachably attached to the 33 or can be moved. In a button sewing machine, in which a button hole is formed in the sewing material to form a knitting seam around the button hole, the push driving means is controlled to move the cloth pressing part in a direction away from the movable member in an up position. Control means CPU 13 is provided.

According to the button tightening sewing machine of the present invention, when the movable member in the lifted position is detached, the control means controls the driving of the push driving means, so that the cloth presser is moved to a position away from the excrement position of the movable member. The fabric presser is not obstructed, making it easy to replace.

The movable member refers to, for example, a cloth cutting scalpel (hereinafter, simply referred to as a scalpel) formed in a straight or eyelet shape or a scalpel arranged at a position opposite to the scalpel. Therefore, you may arrange | position any of a scalpel or a scalpel to a side which descends. In this case, as the scalpel, for example, it may be a member made of resin elasticity or the like, or simply an opening for inserting a scalpel may be arranged.

According to the sewing machine of the present invention, when the movable member is attached and detached, the cloth presser is moved away from the movable member by the downward movement, which is the normal operation of the cloth presser. Can be suppressed.

According to the button knitting machine of the present invention, when the sewing machine is provided with a device for moving the cloth presser in the horizontal direction, the cloth presser is moved away from the movable member by moving the cloth presser using this apparatus when the movable member is attached or detached. In this way, it is not necessary to arrange a new device for moving the fabric pressing part, and the manufacturing cost of the sewing machine can be reduced.

In addition, the button knitting sewing machine of the present invention has a cloth cutting drive means (cloth cutting motor 85) for electrically driving the movable member, the control means to block the energization to the cloth cutting drive means to manually move the movable member It is possible to make Shanghai East possible.

According to the button tightening sewing machine of the present invention, since the movable member can be moved manually by blocking the energization to the cloth cutting driving means, the mounting position or cloth of the movable member is lowered by manually lowering the movable member when the movable member is detached. The cutting position can be confirmed, and the button hole can be precisely formed.

In addition, the button sewing sewing machine of the present invention is provided with a transfer table 60 that is movable in the horizontal direction in the state to put the object to be put, the cloth pressing portion is movable with the transfer table and the push drive means is a transfer table By moving, the cloth pressing portion can be moved to a position away from the movable member.

The button knitting sewing machine of the present invention is provided with turning means (orbiting motor 84) for turning the needle bar about the axis of the needle bar, and the control means controls the driving of the turning means so that the needle bar is the axis of the needle bar. It can be turned approximately 180 ° around.

According to the button sewing machine of the present invention, when the movable member is attached and detached, the needle bar pivots about 180 ° about the axis of the needle bar, for example, an operator located in front of the sewing machine, that is, working toward the direction along the cloth feed direction. In the worker, when the thread passes through the sewing needle, it can be passed in front of him, so that the thread can be easily passed.

The button sewing machine of claim 1 is arranged to be movable in up and down direction and horizontal direction with the needle bar 40 which moves up and down while supporting the sewing needle 41, and the sewing position of the sewing object in the descending position. A cloth pressing portion 70 for pressing the vicinity, a turning means for turning the needle rod (a turning motor 84), and a command signal for turning the needle rod 180 degrees by the turning means when replacing the sewing thread. In a button sewing machine equipped with an operation means (exchange mode key 90d), a control means (CPU 13) for controlling the turning means to reverse the needle bar by 180 ° whenever the operation means is operated. It is characterized by comprising:

According to the button sewing machine of claim 1, the needle bar can be reversed by 180 ° every time the operating means is operated when the sewing thread is replaced, so that the needle can be directed in the direction according to the method of replacing the thread. It is done efficiently. In other words, when replacing the sewing thread with the tip of the new sewing thread passing through the needle hole, the thread insertion side of the needle hole can be passed through to the operator's direction. The thread can be tensioned in the state opposite to the thread insertion side of the needle hole, that is, the side from which the tension chamber emerges toward the operator's direction, so that the thread is easily replaced.

In addition, the button knitting sewing machine of the present invention, the scalpel and the cloth cutting scalpel is arranged detachably facing up and down on the sewing machine arm and the sewing machine bed, and at least one of the cloth cutting scalpel and the scalpel shangdong And a control means (CPU 13) for blocking the energization to the cloth cutting motor when the cloth cutting blade or the female receiving device is detached to allow the cloth cutting blade or the receiving device to be manually moved.

According to the button sewing sewing machine of the present invention, by cutting the energization to the cloth cutting motor it is possible to manually move the cloth cutting scalpel or the female receiving means that when the movable member is attached to the cloth cutting scalpel or the female receiving tray to a position close to each other manually It is possible to check the positional relationship of the cloth cutting scalpel or the receiving blade to each other by close to it can form a buttonhole precisely.

According to the button sewing machine of claim 1, the needle bar can be reversed by 180 ° every time the operating means is operated when the sewing thread is replaced, so that the needle can be directed in the direction according to the method of replacing the thread. It is done efficiently. In other words, when replacing the sewing thread with the tip of the new sewing thread passing through the needle hole, the thread insertion side of the needle hole can be passed through to the operator's direction. The thread can be tensioned in the state opposite to the thread insertion side of the needle hole, that is, the side from which the tension chamber emerges toward the operator's direction, so that the thread is easily replaced.

Next, the button knitting sewing machine 20 according to the present invention will be described with reference to the drawings.

In addition, in the following description, as shown in FIGS. 1 and 4, the vertical direction refers to the axial direction of the needle bar 40, the front and rear directions refer to the cloth transfer direction, and the horizontal direction refers to the front and rear directions in the horizontal plane. Point to the orthogonal direction.

1 and 5, sewing machine 20 (then simply referred to as "sewing machine 20") is sewing machine frame 30, needle bar 40, cloth cutting means 50, transfer table 60 And a driving unit 80 composed of a cloth pressing unit 70 and various actuators, and a control device (control unit) 10 controls the driving of various actuators of the driving unit 80.

The sewing machine frame 30 extends forward from the upper side of the bed portion 31, a follower portion 32 standing up from the rear of the bed portion 31, and the follower portion 32, which form an approximately rectangular box shape. It consists of a sewing machine arm 33 and the like. And to drive the various mechanisms (needle bar 40, cloth cutting means 50, transfer table 60, cloth pressing portion 70, etc.) constituting the sewing machine 20 inside the sewing machine frame 30. For storing the drive unit 80 (the main shaft motor 81, the X-axis motor 82, and the like). In addition, since it is a well-known technique about the specific drive method of the various mechanisms by the drive part 80, detailed description is abbreviate | omitted.

The needle bar 40 is disposed along the up and down direction at the front end of the sewing machine arm 33, and supports the sewing needle 41 at the lower end thereof. Oscillation and rotation in the axial direction are possible.

The cloth cutting means 50 is arranged to form a buttonhole in the cloth, and includes a scalpel 51 as a movable member and a cloth cutting blade 52 as a fixed cloth cutting member.

The mass receiving 51 is protruded downward from the lower surface side of the sewing machine arm 33 and is movable up and down by the cloth cutting motor 85 stored in the sewing machine arm 33.

In addition, a plurality of mass receivers 51 are prepared corresponding to the shape of the button hole to be formed, and are detachable to the sewing machine arm 33 side. Reference numeral 51a is an attachment screw for attaching the mass receiver 51.

The cloth cutting scalpel 52 is disposed on the bed portion 31 so as to face the scalpel 51. In a state where the cloth is placed between the scalpel 51 and the cloth cutting blade 52, the bottom of the cloth tray 51 is moved downward to coincide with the cloth cutting blade 52 to form a button hole having a predetermined shape in the cloth. can do.

The transfer table 60 is a device for moving the fabric to an arbitrary position in the front, rear, left and right directions while the fabric is placed on its upper surface.

The conveyance table 60 forms a thin rectangular box, and is connected to the X-axis motor 82 and the Y-axis motor 83, which will be described later, so that the controller 10 controls the driving of these motors to an arbitrary position. Move. Thereby, a button hole can be formed in the predetermined position of the cloth put on the feed table 60, and a button knitting seam can be formed.

In addition, the upper surface of the conveyance table 60 is centered on the axis of the sewing machine (the line in the front and rear direction passing the vertical trajectory of the sewing needle 41) in which the right transfer plate 61 and the left transfer plate 62 extend in the front-rear direction. It is arranged symmetrically.

The cloth presser 70 has a right cloth presser 71 and a left cloth presser 72, and the right cloth presser 71 and the left cloth presser 72 are used to transfer the cloth to the feed table 60. It is a member which moves integrally with the conveyance stand 60 simultaneously with pushing. In addition, since the right cloth presser 71 and the left cloth presser 72 are disposed to face left and right about the axis of the sewing machine, and have a symmetrical shape with respect to the axis, the right cloth presser ( 71) will be described only.

The right cloth pressing portion 71 has a pressing arm 71a and a pressing foot 71b.

The pressing arm 71a is axially supported by the support portion 63 disposed on the conveyance table 60. Then, at one end of the pressing arm 71a, the cloth is axially supported by the presser foot 71b, which is a substantially rectangular plate body, and is disposed below the feed table 60 at the other end via a plurality of connecting members. It is connected to the press cylinder 86.

Therefore, by driving the cloth pressing cylinder 86, the right cloth pressing part 71 can be rotated in the plane orthogonal to the cloth transfer surface about the axis 63a.

In addition, the right foot pressing portion 71 is moved further downward, that is, in the state in which the pressing arm 71a is rotated counterclockwise about the axis 63a in FIG. It becomes a structure which the right conveyance plate 61 of the upper surface of the feed stand 60 contacts.

Since the cloth pressing portion 70 has such a structure, it is possible to press the left and right sides of the portion where the button hole of the fabric is formed at the time of forming the button hole, and while pressing the left and right sides of the button hole formed when sewing the button, It can move integrally with the cloth transfer table (60).

Although not shown, each of the X-axis motor 82, the Y-axis motor 83, the swing motor 84, and the cloth cutting motor 85 has an X-axis origin sensor 82b for detecting the home position, and an Y-axis origin. The sensor 83b, the turning origin sensor 84b, and the cloth cutting origin sensor 85b are arranged.

Next, the structure of the control apparatus 10 is demonstrated with reference to the block diagram of FIG.

The control device 10 is composed of a ROM 11, a RAM 12, a CPU 13, and the like.

The control unit 10 is connected to the operation panel 90, the push switch 91, the start switch 92 via the interface (I / F) 14, and the main shaft motor 81 and the X-axis motor 82. And various actuators of the drive unit 80 including the Y-axis motor 83, the turning motor 84, the cloth cutting motor 85, the cloth pressing cylinder 86 and the like. .

In addition, a spindle motor drive circuit for driving each motor between the interface 14, the spindle motor 81, the X-axis motor 82, the Y-axis motor 83, the swing motor 84, and the cloth cutting motor 85. (81a), the X-axis motor drive circuit 82a, the Y-axis motor drive circuit 83a, the swing motor drive circuit 84a, the cloth cutting motor drive circuit 85a are interposed, and the interface 14 and the cloth push cylinder A cloth pressing cylinder driving solenoid valve 86a is interposed between the 86.

Further, the control device 10 is connected to the X-axis origin sensor 82b, the Y-axis origin sensor 83b, the line member point sensor 84b, and the cloth cutting origin sensor 85b through the interface 14.

The ROM 11 stores a drive control program for controlling the drive of various actuators of the drive unit 80.

The RAM 12 stores several pattern data to be described later corresponding to each sewing shape (sewing pattern) set in advance, and stores the changed pattern data when the pattern data is changed by the operation panel 90. In addition, the RAM 12 temporarily stores data (seam data) related to, for example, a transfer amount relating to a seam, calculated by the CPU 13 based on the drive control program.

The pattern data refers to a series of setting data required for forming a button sewing sewing such as sewing length and the number of needles. These data can also be arbitrarily changed in the operation panel 90.

The CPU 13 calculates seam data consisting of the amount of cloth feed, the amount of revolution of the needle, and the like at each needle drop point based on the set pattern data and the drive control program. And based on this seam data, the drive of each motor etc. is controlled through each drive circuit.

Although not shown, the CPU 13 also performs drive control on other components of the sewing machine 20, such as thread cutting and loopers, and confirms whether these components are operating normally.

On the operation panel 90, as shown in Fig. 6, a pattern number determined for each sewing pattern is selected, and the pattern number operation unit 90a for displaying and displaying the pattern data of the selected sewing pattern, and if necessary, change the pattern data. Exchange mode key selected at the time of exchange of the preparation key 90c, the receiving tray 51, and the thread S after the data operation unit 90b for setting, various data related to the button sewing sewing, 90d) is disposed.

The push switch 91 is a switch selected when the cloth pressing part 70 moves up and down.

The start switch 92 is a switch that is selected when the button trimming is performed.

The main shaft motor driving circuit 81a is arranged to control the driving mechanism of the needle bar 40 and the looper by controlling the driving of the main shaft motor 81. In addition, since the detector (not shown) for detecting the needle position is disposed in the spindle motor 81, the movement of the feed table 60 in synchronization with the needle position is performed based on the seam data calculated by the CPU 13 as described below. In addition, the needle bar 40 and the looper can be turned.

The X-axis motor drive circuit 82a and the Y-axis motor drive circuit 83a control the driving of the X-axis motor 82 and the Y-axis motor 83, respectively, in the X-axis direction (left and right directions) of the feed table 60. ) And Y-axis direction (forward and backward) to control the movement.

The swing motor driving circuit 84a controls the driving of the swing motor 84 to rotate the needle rod 40 and the looper when forming the seam radially, for example, the eyelet portion of the eyelet knitting seam. Is placed.

The cloth cutting motor driving circuit 85a controls the driving of the cloth cutting motor 85 so as to move the mass receiver 51. The drive circuit 85a receives the motor current off signal output from the CPU 13 to cut off (off) the supply current to the cloth cutting motor 85. In this way, when the current to the cloth cutting motor 85 is cut off, it is possible to manually move the mass receiver 51 connected to the cloth cutting motor 85 manually.

In addition, as shown in FIGS. 1 to 4, the fleece 87 is disposed at this time to move the scalpel 51 and is connected to the scalpel 51 by a connecting mechanism (not shown) to the cloth cutting motor 85. When the supply current is interrupted, the mass receiver 51 can be moved by turning by hand.

Next, the control method of the sewing machine by the control apparatus 10 which concerns on a present Example with reference to the flowchart of FIG. 7 and FIG. 8 is demonstrated.

First, in the main routine shown in FIG. 7, various data necessary for sewing the button are set by the pattern number operation unit 90a and the data operation unit 90b of the operation panel 90 (step S100).

Next, the operation of the preparation key 90c is monitored (step S101). In this case, when the preparation key 90c is on-operated (YES), the cloth pressing part 70 is lowered to come into contact with the upper surface of the feed table 60. It enters a state (step S102), and it moves to step S103. If No, the flow returns to step S100 to enable data setting again, and the standby state until the ready key 90c is on.

In step S103, an origin search for detecting the origin position of the transfer feeder 60, the needle bar 40, the looper, the receiving tray 51, etc. is performed by each origin sensor.

And in step S104, the conveyance stand 60 is moved to the so-called set position set in front so that the cloth can be easily set to the conveyance stand 60, and the cloth pressing part 70 is raised in step S105. Also in this state, when the sewing machine 20 is viewed from the side as shown in FIG. 1, the mesothel 51 is in a raised position, and the pressing arm 71a of the cloth presser 70 is attached to the mesothele 51, in particular, It overlaps with the screw 51a.

When the operation of the replacement mode key 90d is monitored in step S106, that is, when the replacement mode key 90d is not on (No), when the cloth cutting band or the sewing needle 41 is not necessary, step S108. Go to. In the case of YES, that is, when the exchange mode key 90d is on, it moves to the exchange mode subroutine shown in FIG. 8 (step S107).

In the exchange mode subroutine, as shown in FIG. 2, first, the cloth pressing part 70 is lowered (step S200), and the feed table 60 moves to the home position set at the back, and the needle bar 40 and the looper are at the origin. It rotates approximately 180 degrees to the axial direction from a position (step S201), and the electric current of the cloth cutting motor 85 is turned off (step S202). Then, the operation of the replacement mode key 90d is monitored (step S203).

During this time, the operator exchanges the sewing needle 41 or the sewing thread S together with the scalpel 51. In addition, since the current of the cloth cutting motor 85 is turned off, by manually winding the scalpel 51 in the ascending position by winding the fleece 87 by hand, the mounting position or the cloth cutting position of the scalpel 51. You can check.

When the operator wants to turn the direction of the needle bar 40 again in order to correspond to the desired method of changing the sewing thread during the end of the replacement operation, the operation mode key 90d is turned on in step S203. In addition, the exchange mode key 90d which does not need to rotate the direction of the needle bar 40 moves to step S207 without being operated on.

In step S204, whether the needle bar 40 is in the home position is detected.

If the needle bar 40 is in the home position (Yes), the needle bar 40 is rotated approximately 180 degrees in the axial direction (step S205). If the needle bar 40 is not at the home position and is at a position rotated 180 degrees (No), the needle bar 40 is rotated to the home position (step S206) (see Fig. 3).

In this manner, each time the operation mode key 90d is operated in step S203, a command signal for inverting the needle bar 40 by about 180 degrees is output. Accordingly, the needle bar 40 is inverted by 180 degrees. The exchange of 41) and the seal S can be performed quickly.

In step S207, when the operation of the preparation key 90c is monitored and the preparation key 90c is not operated on, the operation returns to step S203, and the standby state is performed until the preparation key 90c is operated on.

When the preparation key 90c is turned on, a current is supplied to the cloth cutting motor 85 (step S208), and the home position is searched for the mass receiver 51 after the replacement (step S209).

Then, the feed bar 60 is moved again to the set position and at the same time, the needle bar 40 and the looper are rotated to the origin position (step S210). In addition, in step S210, when the needle bar 40 and the looper are in a home position, it will not turn.

After that, by raising the cloth pressing part 70 (step S211), the exchange mode subroutine ends and returns to step S106.

As described above, when the replacement mode key 90d is not on in step S106, the operation of the push switch 91 is monitored in step S108. If the push switch 91 is not on, the process moves to step S106, and the standby switch 91 is in a standby state until the push switch 91 is on, and when the push switch 91 is on, the cloth pressing unit 70 is turned on. It lowers and pushes a cloth to a press stand (step S109). In addition, the cloth is set on the conveyance table 60 in the set position up to this point.

If the cloth is to be reset at this point in time, the push switch 91 is turned on in step S110, the cloth pressing part 70 is raised (step S111), and the process returns to step 106.

When the push switch 91 is not turned on in step S110, the operation of the start switch 92 is monitored (step S112).

If the start switch 92 is not turned on in step S112, the process returns to step S110 to be in a standby state until the start switch 92 is turned on, and if the start switch 92 is turned on, a mess receiver (51) is lowered, and a buttonhole is formed in the cloth in the state pushed by the feeder 60 to perform button sewing sewing (step S113). After the button sewing sewing is completed, the process proceeds to step S114.

In step S114, the feed bar 60, the needle bar 40, the looper, etc., are present at the position at which the bobbin sewing is completed. Therefore, the feed bar 60 is moved to the set position and the needle bar 40 at the same time. Move the looper to the origin position.

Then, the cloth pressing portion 70 is raised (step S115) and the flow returns to step S106.

The series of control by the control device 10 of the sewing machine is finished.

According to the button knitting machine 20 according to the present embodiment, when the cloth pressing part 70 is viewed from the lower side, that is, from the side only by turning on the exchange mode key 90d when the scalpel 51 is replaced, The pressing part 70 moves to the position which does not overlap with the scalpel 51, especially the mounting screw 51a, and the conveying stand 60 moves to the origin position, and the cloth pressing part is disposed on the conveying table 60. The 70 moves in the direction away from the mass receiver 51. Therefore, the cloth pressing portion 70 is not obstructed at the time of replacing the receiving tray 51, thereby facilitating the replacement operation.

In addition, the fabric presser 70 moves downward to the home position of the feed table 60 while the fabric presser 70 moves to a position away from the sewing needle 41. Work becomes easy.

In addition, there is no need to arrange a new device for moving the cloth pressing part 70, and the cloth pressing part 70 is removed from the measuring bowl 51 by using a general feeder 60 equipped with a normal button sewing machine. Can fall off. Therefore, the manufacturing cost of the sewing machine can be suppressed.

Further, the needle bar 40 is turned about 180 degrees in the axial direction by the on operation of the replacement mode key 90d in the main routine. Therefore, the operator usually located in front of the sewing machine 20, for example, when passing the thread (S) to the sewing needle 41 can be passed from the front to facilitate the thread exchange operation.

Further, the needle bar 40 can be inverted 180 degrees in the axial direction for every on operation of the exchange mode key 90d in the exchange mode subroutine. Thus, for example, when replacing the thread (S), the thread (S) used up to now passes through the sewing needle (41) in the state of the thread (S), for example, cut near the thread fitting part Even when the new thread S passes through the sewing needle 41 by tying the end of the cut part and the new thread S and tensioning the other end of the cut part of the thread S used so far. For example, by turning the sewing needle 41 in a desired direction, the direction in which the sewing thread S is tensioned tends to be easily tensioned (arrow A in FIG. 3), thereby improving workability of the thread exchange operation. .

In addition, since the measuring bowl 51 can be moved manually by turning off the current of the cutting cloth motor 85, for example, cutting the measuring cloth 51 by manually lowering the measuring tray 51 to a position close to the cutting cloth blade 52. The position with the scalpel 52 can be confirmed, and a button hole can be formed precisely.

In addition, in the present embodiment, the button knitting machine 20 is provided with a feeder 60, and the cloth pressing portion 70 moves together with the feeder 60, but the feeder 60 is not limited thereto. ) May not be provided. In this case, it is possible to improve the workability of the replacement work by moving the cloth pressing portion 70 downward when the measuring bowl 51 is replaced.

In the present embodiment, the case where the scalpel 51 as the movable member and the cloth cutting scalpel 52 as the fixing member has been described, is not limited thereto, but the cloth cutting scalpel 52 as the movable member and the fixing member are not limited thereto. It is also possible to arrange the scalpel 51 as a.

In addition, when the cloth presses 70 are lowered at the time of replacing the scalpel 51, and the transfer table 60 is moved to the home position, or when the power supply to the cloth cutting motor 85 is cut off, the exchange mode key 90d is used. The needle bar 40 is inverted by 180 degrees every time it is operated. However, the needle bar 40 is not limited to this, but the fabric presser 70 or the feeder 60 is not moved and the power to the cloth cutting motor 85 is not interrupted. The needle bar 40 may be inverted by 180 degrees each time the key 90d is operated.

In addition, although the cloth press part 70 is lowered and the conveyance stand 60 moves to the origin position at the time of the replacement of the scalpel 51, it is not limited to this, for example, the cloth press part 70 or the feed table ( It is also possible to move the scalpel 51 manually by turning off the current of the cloth cutting motor 85 without moving 60, and at this time, it is provided with a structure capable of turning the needle bar 40. It may be.

In addition, in the button sewing machine according to the present invention, the order of button sewing sewing is not a problem. That is, it does not matter whether it is a so-called sun scissor which forms a buttonhole in a cloth, and then knits around a buttonhole, or a so-called hummer which forms a buttonhole after a needle thread is sewn to a predetermined place of cloth.

In addition, the control method of the button knitting machine 20 by the control apparatus 10 is not limited to what was shown in the Example of this invention, It can change within the scope of this invention.

1 is a side view of main parts of a sewing machine according to an embodiment;

2 is a side view of main parts of the sewing machine according to the embodiment;

3 is a side view of main parts of the sewing machine according to the embodiment;

4 is a front view of main parts of the sewing machine according to the embodiment;

5 is a block diagram showing the structure of a sewing machine.

6 illustrates an operation panel.

7 is a flowchart showing a control method of the sewing machine.

8 is a flowchart illustrating a method of controlling a sewing machine.

Fig. 9 is a side view of the main portion showing a typical cloth pressing portion and a transition feeder.

※ Explanation of symbols about main part of drawing ※

10: control means (CPU) 20: button sewing machine sewing

33: sewing machine arm 40: needle bar

41: sewing needle 50: cloth cutting means

51: scalpel 52: cloth cutting scalpel

60: feed tray 70: cloth press

82: X axis motor 83: Y axis motor

84: turning means (slewing motor)

85: cloth cutting drive means (cloth cutting motor)

86: cloth pressing cylinder 90d: operation means (exchange mode key)

Claims (1)

A needle bar that moves up and down while supporting the sewing needle, and is movable so as to be movable in the up and down direction and in the horizontal direction, and a cloth pressing part for pressing the sewing position near the sewing object in the lowered position, and turning means for turning the needle bar. In the button sewing machine with a sewing machine having an operation means for outputting a command signal for turning the needle bar 180 ° by the turning means when changing the sewing thread, And a control means for controlling the pivoting means to reverse the needle rod by 180 ° whenever the operation means is operated.

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