JP2018130406A - End edge part automatic correction device and sewing machine including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely perform position adjustment of end edge parts of both fabrics automatically in sewing overlapped fabrics.SOLUTION: In an end edge part automatic correction device 10 for automatically correcting deviation from a predetermined position of an end edge part of each fabric substantially orthogonal to a feed direction of the fabric in a sewing machine, by a controller 51, a lower side fabric pressing drive part 23 is operated based on detection of a lower side detection part 24, and between a lower side action position and a lower side non-action position, a lower side fabric pressing part 22 is operated at least once, and also, a lower side fabric end edge part is moved to a predetermined position by driving a lower side feeding conveyance part 21. An upper side fabric pressing drive part 33 is operated based on detection of an upper side detection part 34, and between an upper side action position and an upper side non-action position, an upper side fabric pressing part 32 is operated at least once, and also, an upper side fabric end edge part is moved to a predetermined position by driving an upper side feeding conveyance part 31.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automatic edge correction device that automatically corrects the left and right positions of the edge of a fabric when sewing with a sewing machine, and a sewing machine including the same.

  2. Description of the Related Art Conventionally, there is known a hemline sewing machine including a folding guide device that folds an edge portion of a fabric and feeds it up and down before a needle drop position on a sewing machine bed. For example, as in Patent Document 1, a feed belt and a fabric presser are disposed in front of a folding guide device with a fabric feed path interposed therebetween, and a rotary based on the detection result of a fabric end detector disposed in front of these opposed portions. 2. Description of the Related Art An automatic edge correction unit that moves a cloth presser up and down by an operation of a solenoid and sandwiches the cloth with a feed belt to apply a lateral movement force is known.

Japanese Patent Laid-Open No. 2006-116636

  For example, it is common that the edge part (cuff part) of the body constituting the shirt and the edge part of the sleeve part have different curved shapes, and have such different curved edge parts. When guiding the two fabrics to the sewing machine side, the sewing manufacturer adjusts the distance between the edge and the needle drop position while holding both fabrics with both hands and moving both fabrics in the direction perpendicular to the feed direction. Must. In order to perform such adjustment work, a skill of sewing work having a high skill level is required. For this reason, when an inexperienced operator performs a sewing operation, there is a possibility that defects such as wrinkles may occur in the stitched portion.

  However, in the sewing machine of Patent Document 1, a lateral movement force is automatically applied to one piece of fabric, and when sewing two pieces of fabric having edge portions with different curved shapes, A moving force in the left-right direction cannot be applied to each of the two pieces of fabric. For this reason, the other fabric must be adjusted left and right with human hands, and it will nevertheless require excellent skills like a skilled worker. It was difficult.

  The present invention has been made in view of such a point, and an object of the present invention is to automatically and reliably adjust the positions of the edge portions of both fabrics in the overlap stitching of fabrics.

  In order to achieve the above object, according to the present invention, an adjustment mechanism corresponding to each of the upper and lower fabrics is provided so that the position of the edge portion can be automatically adjusted.

  Specifically, in the first invention, the lower cloth and the upper cloth each having end edges are arranged on the front side of the sewing machine that sews the edge parts of the upper cloth while feeding them in the feeding direction. It is premised on an automatic edge correction device that automatically corrects a deviation from a predetermined position of the edge of each fabric in a direction substantially orthogonal to the feed direction.

The edge automatic correction device is
A lower feed conveying unit that is provided in front of the needle drop position of the sewing machine and has a lower feed surface that moves in a direction substantially orthogonal to the feed direction below the feed path of the lower fabric,
A lower cloth presser portion provided above the lower feed conveyance section and having a lower working end facing the lower feed surface across the lower cloth feed path;
The lower action position where the lower action end moves and the lower dough is sandwiched between the lower action face and the lower action position where the lower action end moves and moves away from the lower feed face A lower fabric presser drive unit that moves the lower fabric presser unit at least once between the non-acting position;
A lower detection unit that is disposed in the vicinity of the lower fabric presser and detects the position of the edge of the lower fabric;
An upper feed conveyance unit having an upper feed surface that is provided in front of the needle drop position of the sewing machine and moves in a direction substantially orthogonal to the feed direction above the feed path of the upper fabric;
An upper fabric presser portion provided below the upper feed conveyance unit and having an upper working end facing the upper feed surface across the upper fabric feed path;
Between the upper working position where the upper working end moves to sandwich the upper fabric between the upper feeding surface and the upper non-working position where the upper working end moves and separates from the upper feeding surface An upper fabric presser drive unit that moves the upper fabric presser unit at least once;
An upper side detection unit that is disposed in the vicinity of the upper side fabric presser and detects the position of the edge of the upper side fabric;
Based on the detection of the lower detection unit, the lower fabric press driving unit is operated, and the lower fabric press unit is moved at least once between the lower operation position and the lower non-operation position. A lower control for driving the lower feed conveyance unit to move the lower fabric edge to a predetermined position, and
Based on the detection of the upper detection unit, the upper fabric press driving unit is operated to move the upper fabric press unit at least once between the upper operating position and the upper non-operating position, And a control unit that performs upper control for driving the upper part and moving the upper fabric edge to a predetermined position.

  According to the above configuration, the control unit operates the lower fabric press driving unit based on the detection of the lower detection unit, and at least moves the lower fabric press unit between the lower operation position and the lower non-operation position. The lower cloth is appropriately adjusted to be displaced from the predetermined position by performing the lower control for moving the lower cloth edge to the predetermined position by driving the lower feeding and conveying section one or more times. . The control unit operates the upper fabric presser driving unit based on the detection of the upper detection unit, moves the upper fabric presser unit at least once between the upper operating position and the upper non-operating position, The upper fabric is driven to perform the upper control for moving the upper fabric edge to the predetermined position, so that the deviation of the upper fabric from the predetermined position is appropriately adjusted. For this reason, since the deviation of the lower fabric and the upper fabric from the predetermined positions is automatically corrected, when these fabrics have curved edges, However, it is possible to obtain a predetermined quality stitch very easily. Thereby, depending on the case, one worker can operate two sewing machines. The “near side” means a side closer to the sewing manufacturer than the sewing machine. The term “substantially orthogonal” means that it may be slightly inclined from 90 ° as well as a case of being completely orthogonal. “Near the upper fabric presser” means that it may be placed at any position such as the back side or the near side as viewed from the operator as long as it is near the upper fabric presser.

In the second invention, in the first invention,
At least the lower feed conveyance unit, the lower fabric presser unit, and the lower fabric presser drive unit constitute a unit and constitute a lower automatic correction unit,
At least the upper feed conveyance unit, the upper fabric presser unit, and the upper fabric presser drive unit constitute a unit to constitute an upper automatic correction unit,
The lower automatic correction unit and the upper automatic correction unit are configured to be retractable or removable from the sewing machine, respectively.

  According to the above configuration, the lower automatic correction unit that adjusts the position of the edge of the lower fabric and the upper automatic correction unit that adjusts the position of the edge of the upper fabric can be retracted from the sewing machine. These are easy to evacuate when necessary. Also, one automatic correction unit can be removed depending on the work content, such as when sewing one piece of fabric. For this reason, workability is good and it can be used for other models.

In the third invention, in the second invention,
At least one of the lower automatic correction unit and the upper automatic correction unit is configured to be retractable by an actuator.

  According to the above configuration, by driving the actuator, at least one of the lower automatic correction unit and the upper automatic correction unit can be retreated, so that only the unit that is desired to be retreated is retreated or both units are retreated at once. As a result, workability is extremely improved.

In the fourth invention, in the third invention,
The lower automatic correction unit and the upper automatic correction unit are configured to be retractable by extending and contracting one air cylinder.

  According to the above configuration, by driving one air cylinder, the lower automatic correction unit and the upper automatic correction unit can be retracted at a time, so that workability is extremely improved.

In a fifth invention, in any one of the second to fourth inventions,
A hinge part swingably attached to the sewing machine;
And an engaging portion that can be engaged with the sewing machine.

  According to the above configuration, maintenance and the like can be easily performed by opening the lower automatic correction unit and the upper automatic correction unit around the hinge portion when necessary.

In a sixth invention, in any one of the first to fifth inventions,
The lower side detection unit and the upper side detection unit are configured as a unit, and the lower cloth presser part and the upper work presser part have a lower working end and a side on which the lower cloth and the upper cloth are inserted rather than the upper working end. Located on the opposite side.

  According to said structure, a lower side detection part and the said lower side detection part are excellent in maintainability with a compact and space-saving structure.

  In the sewing machine of the seventh invention, the edge automatic correction device of any one of the first to sixth inventions is provided so as to be retractable or removable on the front side in the feed direction of the needle drop position in the sewing machine. .

  According to said structure, the sewing machine with high commercial property which can perform position adjustment of the edge part of both fabrics automatically and reliably in the fabric oversewing is obtained.

  As described above, according to the present invention, the lower fabric presser drive unit is operated based on the detection of the lower detection unit, and the lower fabric presser unit is positioned between the lower operation position and the lower non-operation position. Is moved at least once, and the lower feed conveyance unit is driven to move the fabric edge to a predetermined position, and the upper fabric press driving unit is operated based on the detection of the upper detection unit. By moving the upper fabric retainer at least once between the upper non-acting position and driving the upper feed conveyance unit to move the fabric edge to a predetermined position, It is possible to automatically and reliably adjust the positions of the edge portions of both fabrics in the overlap stitching.

It is a perspective view which shows the edge part automatic correction apparatus which concerns on embodiment of this invention. It is a perspective view which shows the sewing machine provided with the edge part automatic correction apparatus. It is the perspective view which looked at the edge part automatic correction device from another direction. It is a perspective view which shows a lower side automatic correction unit and an upper side automatic correction unit. It is a perspective view which shows an upper side automatic correction unit. It is the schematic which shows the shape before the sewing of the body part and sleeve part in a shirt. It is a perspective view which expands and shows a lower side detection part and an upper side detection part. It is a perspective view which expands and shows a part of sewing machine apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 shows a sewing machine 50 provided with an edge automatic correction device according to an embodiment of the present invention. As shown in FIG. 1, the sewing machine 50 includes a sewing machine 1, an edge automatic correction device 10, and a control unit. And a main motor 52 for driving the sewing machine 1 as a main element. Electric power is supplied from the power source 53 to the sewing machine 50, and high-pressure air is supplied from the air source 54 via the air valve 55.

  Hereinafter, each device will be described in detail. In this embodiment, for example, the sewing machine device 1 and the edge automatic correction device 10 are installed on a work table (not shown), and the controller 51, the main motor 52, and the air valve 55 are installed under the work table. For ease of explanation, in the following explanation, “upper (upper side)” and “lower (lower side)” represent the positional relationship of the sewing machine 50 in the vertical direction. Further, when referring to the sewing machine 1 as viewed from the sewing manufacturer using the sewing machine 50, the “front side” represents a side closer to the sewing manufacturer than the sewing machine 1, while the “back side” Represents the positional relationship on the side farther than the sewing machine 1 from the sewing manufacturer. Further, the “left-right direction” represents a direction orthogonal to a cloth feeding direction A, which will be described later, in a plan view.

-Configuration of sewing machine-
As shown in FIG. 2, the sewing machine device 1 is an overlock sewing machine mainly used for edge stitching, and specifically, two upper and lower fabrics W1, W2 ( As shown in FIG. 6, the edge portions are configured so as to be sewn together while being fed in the feed direction A as viewed from the sewing manufacturer in a state where the both edge portions are overlapped. In FIG. 6, the upper fabric W <b> 1 indicates the sleeve portion of the shirt, and the lower fabric W <b> 2 indicates the body of the shirt.

  The sewing machine device 1 includes a main body 2, and a cylinder bed 3 having a substantially rectangular box shape is attached to a substantially center in the vertical direction of the main body 2. As shown in an enlarged view in FIG. 8, a needle plate 4 for horizontally placing a cloth to be fed in the feeding direction A from the front side is horizontally disposed on the upper portion of the cylinder bed portion 3. A sewing head portion 5 is attached above the cylinder bed portion 3. A sewing bar 7 that extends downward toward the needle plate 4 and a sewing needle 7 that is fixed to the lower end of the needle bar are provided below the sewing head portion 5. The sewing machine head unit 5 incorporates a drive mechanism for reciprocating the needle bar up and down. A presser plate 9 is provided on the arm portion 8 below the sewing head portion 5. With such a sewing machine 1, the fabric is placed on the upper surface of the needle plate 4, and the main body portion 2 is driven while being pressed by the presser plate 9, so that the end edge of the fabric is edge stitched with the sewing needle 7. Can be done.

-Configuration of automatic edge correction device-
As shown in FIG. 2, the edge automatic correction device 10 is provided on the front side of the sewing machine 1 that sews while feeding the edge portions of the lower fabric W2 and the upper fabric W1 each having an edge portion in the feed direction A. It is arranged and configured to automatically correct the deviation from the predetermined position of the edge of each fabric in the left-right direction substantially perpendicular to the fabric feed direction A in this sewing machine.

  Specifically, the edge automatic correction device 10 includes a correction device main body 11 made of, for example, a steel plate, and the correction device main body 11 is, for example, a sewing machine device via a hinge portion 11a having a swing shaft extending in the vertical direction. 1 is swingably attached. On the opposite side of the correction device main body 11 from the hinge portion 11 a, an engagement pin 12 is provided as an engagement portion that can be engaged with the sewing machine device 1. This engagement pin 12 can be engaged with the U-shaped portion 2b at the tip of the engagement arm 2a extending from the sewing machine 1, and has a screw portion 12a that can be tightened in the engaged state.

  As shown in FIG. 3, an air cylinder 13 as an actuator is fixed to a portion near the hinge portion 11 a of the correction device main body 11 via a cylinder fixing portion 14, and the tip of the piston rod 13 a of the air cylinder 13 is fixed. In addition, the unit support 15 is connected. Specifically, the cylinder tube of the air cylinder 13 is fixed to the mounting bracket 14a of the cylinder fixing portion 14, and the cylinder side roller 15a fixed to the unit support portion 15 is guided in the cylinder guide hole 14b of the cylinder fixing portion 14. It has become. A plate-like unit base portion 16 is connected to the unit support portion 15. Further, a supported bar 16 a extends below the unit base portion 16, and this supported bar 16 a is supported by a guide block 11 b provided in the correction device main body 11 so as to be slidable. Thus, since the unit base part 16 is supported so that sliding movement is possible up and down, it can slide stably.

  As shown in FIG. 4, the lower automatic correction unit 20 and the upper automatic correction unit 30 are fixed to the unit base portion 16.

  The lower automatic correction unit 20 includes at least a lower feed conveyance unit 21, a lower fabric presser unit 22, and a lower fabric presser drive unit 23. That is, the lower feed belt 21b is provided in front of the needle drop position of the sewing machine 1, and has a lower feed belt 21b having a lower feed surface 21a that moves in the left-right direction below the feed path of the lower fabric W2. And a lower drive pulley 21c, a lower driven pulley 21d, and a lower transfer electric motor 21e (shown in FIG. 1 and the like) for rotating the lower drive pulley 21c. Yes. By rotating the lower conveyance electric motor 21e forward and backward, the lower conveyance belt 21b can move in either the left or right direction. In the present embodiment, the lower feeding and conveying unit 21 is covered with the lower belt cover 21f so that the cloth and fingers cannot be touched.

  As shown in FIG. 4, the lower fabric retainer 22 is provided above the lower feed transport unit 21 (directly above the lower feed surface 21a), and lower feed across the feed path of the lower fabric W2. A hemispherical lower working end 22a facing the surface 21a is integrally formed. The lower working end 22a may be ball-shaped and rollable.

  The lower fabric presser drive unit 23 has a lower operation position where the lower operation end 22a moves and the lower fabric W2 is sandwiched between the lower operation end 22a and the lower operation end 22a moves. The lower fabric presser 22 is repeatedly moved between the lower non-operating position (the state shown in FIG. 4) and separated from the lower feed surface 21a, and is connected to the base end side of the lower fabric presser 22. The lower presser support pin 23a, the lower presser link mechanism 23b provided with the lower presser support pin 23a at the tip, and the lower presser solenoid 23c for driving the lower presser link mechanism 23b are provided. . The lower presser solenoid 23c is composed of, for example, a rotary solenoid, and when an electric signal is sent, the lower presser solenoid 23c rotates by a predetermined angle, and the lower presser link mechanism 23b is driven to switch the lower fabric presser part 22 to the lower operation position. It is like that. When the lower presser solenoid 23c is not driven, the lower fabric presser 22 is returned to the lower non-operating position by, for example, a lower return spring (not shown).

  And as shown in FIG. 3, the lower side detection part 24 which detects the edge part position of the lower side fabric W2 in the back | inner side seeing from the operator of the lower side conveyance conveyance part 21 and the lower side fabric pressing part 22 is shown. Is provided. As shown in an enlarged view in FIG. 7, the lower detection unit 24 is attached to a sensor mounting bracket 25, and is provided below the plate-like sensor separator 26 provided in the sensor mounting bracket 25. . The lower detection unit 24 includes a pair of lower fabric light-emitting units 24a and a lower fabric light-receiving unit 24b, and the lower fabric light-receiving unit 24b detects the light from the pair of lower fabric light-emitting units 24a. Are also received, when only one of them is received, and when neither is received, thereby detecting a shift in the end position of the lower fabric W2 and sending a signal to the controller 51.

  Similarly, as shown in FIG. 5, the upper automatic correction unit 30 includes at least an upper feed conveyance unit 31, an upper fabric presser unit 32, and an upper fabric presser drive unit 33. That is, the upper feed conveyance unit 31 is provided in front of the needle drop position of the sewing machine 1, and has an upper conveyance belt 31b having an upper feed surface 31a that moves in the left-right direction below the feed path of the upper fabric W1, and its upper side. The upper drive pulley 31c, the upper driven pulley 31d, and the upper transport electric motor 31e that rotate the upper drive pulley 31c are provided. By rotating the upper conveying electric motor 31e forward and backward, the upper conveying belt 31b can move in either the left or right direction. In the present embodiment, the upper feed conveyance unit 31 is covered with the upper belt cover 31f so that the cloth and fingers cannot be touched.

  The upper fabric holding portion 32 is provided below the upper feed conveyance portion 31 (below the upper feed surface 31a), and has a hemispherical upper working end 32a facing the upper feed surface 31a across the feed path of the upper fabric W1. It is integrally formed. The upper working end 32a may be ball-shaped and rollable.

  The upper fabric presser drive unit 33 moves away from the upper feed surface 31a by moving the upper work end 32a and holding the upper fabric W1 between the upper feed end 31a and the upper work end 32a. The upper fabric presser 32 is repeatedly moved between the upper non-operating position (the state shown in FIG. 5), the upper presser support pin 33a connected to the base end side of the upper fabric presser 32, and the upper presser support pin 33a. An upper presser link mechanism 33b provided with a presser support pin 33a at the tip thereof and an upper presser solenoid 33c for driving the upper presser link mechanism 33b are provided. The upper presser solenoid 33c is also composed of, for example, a rotary solenoid. When an electrical signal is sent, the upper presser solenoid 33c rotates by a predetermined angle, and the upper presser link mechanism 33b is driven to switch the upper fabric presser part 32 to the upper operation position. . When the upper presser solenoid 33c is not driven, the upper fabric presser 32 is returned to the upper non-operating position by an upper return spring (not shown), for example.

  And as shown in FIG. 3, the upper side detection part 34 which detects the edge part position of the upper side fabric W1 is provided in the back | inner side seeing from the operator of the upper side conveyance conveyance part 31 and the upper side fabric pressing part 32. . As shown in an enlarged view in FIG. 7, the upper side detection unit 34 is provided on the upper side of the sensor separator 26 and includes a pair of upper fabric light emitting units 34 a and an upper fabric light receiving unit 34 b. When the light receiving unit 34b receives light from the pair of upper fabric light emitting units 34a, it is determined whether only one of the light is received, or neither is received, thereby shifting the end position of the upper fabric W1. It detects and sends a signal to the controller 51.

  In the present embodiment, the lower detection unit 24 and the upper detection unit 34 are configured as a sensor unit 27. For this reason, it has a compact and space-saving configuration and is excellent in maintainability, but each unit may be configured separately.

  In addition, as shown in FIG. 5, at least the upper fabric feed unit 31, the upper fabric presser unit 32, and the upper fabric presser drive unit 33 are configured as a unit to configure the upper automatic correction unit 30. For this reason, the upper side automatic correction unit 30 is configured to be detachable independently.

  Then, the controller 51 operates the lower fabric presser drive unit 23 based on the detection of the lower detection unit 24 to repeatedly move the lower fabric presser unit 22 between the lower operation position and the lower non-operation position. At the same time, based on the lower control for driving the lower feed conveying unit 21 to move the lower fabric edge to a predetermined position and the detection of the upper detection unit 34, the upper fabric press driving unit 33 is operated to operate the upper side action. The upper fabric pressing portion 32 is repeatedly moved between the position and the upper non-operating position, and the upper control for moving the upper fabric edge to a predetermined position by driving the upper feed conveyance portion 31 is performed. Yes. As a configuration of the controller 51, the lower control and the upper control may be performed on one circuit board, or may be performed on separate circuit boards.

−Operation of automatic edge correction device−
Next, the operation of the edge automatic correction device 10 according to the present embodiment will be specifically described.

  As shown in FIG. 6, for example, the edge of the sleeve (upper fabric W1) that is cuffed to the cuff of the shirt body (lower fabric W2) is sharper than the cuff portion of the body. Generally, it is formed in a curved line (that is, a curvature is large). When the lower fabric W2 and the upper fabric W1 are simultaneously fed in the feeding direction A, the controller 51 automatically adjusts the deviation (left / right deviation) from the predetermined position.

  Specifically, as the lower control, when the lower fabric light receiving unit 24b receives the light of the lower fabric light emitting unit 24a of the lower detection unit 24 and the lower fabric W2 is shifted to the left. Upon detection, the controller 51 sends a signal to the lower presser solenoid 23c to drive the lower presser link mechanism 23b and strike the lower fabric W2 against the lower feed surface 21a with the lower fabric presser 22 as the lower working position. . Specifically, the lower presser solenoid 23c is repeatedly turned on and off at a high speed, and the lower fabric presser 22 repeatedly presses and releases the lower fabric W2. At the same time or around that time, the lower conveying electric motor 21e is driven to drive the lower conveying belt 21b to the right. As a result, the lower fabric W2 is struck against the lower conveyor belt 21b with an appropriate force and is forced to move to the right. Note that if the lower fabric presser 22 continues to press the lower fabric W2, problems such as kinking of the lower fabric W2 occur. When the lower detection unit 24 detects that the left lower fabric light emitting unit 24a does not receive the light and the deviation is corrected, the controller 51 stops the on / off command to the lower presser solenoid 23c, and the lower fabric is stopped. Return the presser part 22 to the lower non-operating position. Then, the driving of the lower conveyance belt 21b is stopped.

  On the contrary, if the lower fabric light receiving unit 24b detects that the lower fabric light emitting unit 24a does not receive the light from the lower fabric light emitting unit 24a and the lower fabric W2 is shifted to the right, the controller 51 causes the lower presser solenoid 23c. A signal for repeatedly turning on and off at high speed is sent to drive the lower presser link mechanism 23b to strike the lower fabric W2 on the lower feed surface 21a with the lower fabric presser 22 as the lower acting position. At the same time or around that time, the lower conveying electric motor 21e is driven to drive the lower conveying belt 21b to the left. As a result, the lower fabric W2 is forcibly moved to the left by the lower conveying belt 21b. When the lower detection unit 24 receives light from the lower fabric light emitting unit 24a on the right side and detects that the deviation has been corrected, the controller 51 stops the on / off command to the lower presser solenoid 23c, and the lower fabric is stopped. Return the presser part 22 to the lower non-operating position. Then, the driving of the lower conveyance belt 21b is stopped. In addition, when the lower presser portion 22 once strikes the lower fabric W2 and the displacement is corrected, an on / off command may be sent to the lower presser solenoid 23c only once.

  On the other hand, as the upper control, when the upper fabric light-receiving unit 34b does not receive the light of both the upper fabric light-emitting units 34a of the upper detection unit 34 and the upper fabric W1 is shifted to the left, the controller 51 detects the upper presser. A signal is sent to the solenoid 33c to drive the upper presser link mechanism 33b to strike the upper fabric W2 on the upper feed surface 31a with the upper fabric presser 32 as the upper working position. Specifically, the upper presser solenoid 33c is repeatedly turned on and off at a high speed, and the upper fabric presser unit 32 repeatedly presses the upper fabric W1 and releases it. At the same time or around that time, the upper conveying electric motor 31e is driven to drive the upper conveying belt 31b to the right. As a result, the upper fabric W1 is struck against the upper conveyor belt 31b with an appropriate force and is forced to move to the right. Note that if the upper fabric presser 32 continues to press the upper fabric W1, problems such as kinking of the upper fabric W1 occur. When the upper detection unit 34 receives the light from the left upper fabric light emitting unit 34a and detects that the deviation has been corrected, the controller 51 stops the on / off command to the upper presser solenoid 33c and moves the upper fabric presser unit 32 to the upper side. Return to the non-acting position. Then, the driving of the upper conveyance belt 31b is stopped.

  Conversely, when the upper fabric light receiving part 34b receives light from both upper fabric light emitting parts 34a and detects that the upper fabric W1 is shifted to the right, the controller 51 repeatedly turns on and off the upper presser solenoid 33c at a high speed. A signal is sent to drive the upper presser link mechanism 33b to strike the upper fabric W1 against the upper feed surface 31a with the upper fabric presser 32 as the upper working position. At the same time or around that time, the upper conveying electric motor 31e is driven to drive the upper conveying belt 31b to the left. As a result, the upper fabric W1 is forcibly moved to the left side by the upper conveying belt 31b. When the upper detection unit 34 again detects that the right upper fabric light emitting unit 34a does not receive the light and the deviation is corrected, the controller 51 stops the on / off command to the upper presser solenoid 33c and the upper fabric presser unit 32. Return to the upper non-operating position. Then, the driving of the upper conveyance belt 31b is stopped. In addition, when the upper presser portion 32 once strikes the upper fabric W1 and the displacement is corrected, an on / off command may be sent to the upper presser solenoid 33c only once.

  As described above, the shift of the end positions of the lower fabric W2 and the upper fabric W1 is automatically corrected. Therefore, when these fabrics W1 and W2 have curved edge portions, inexperienced workers Even so, it is possible to obtain a predetermined quality stitch very easily. Thereby, depending on the case, one worker can operate the two sewing machines 50.

  In the present embodiment, by driving and shortening one air cylinder 13, the unit base portion 16 moves to the right side with respect to the correction apparatus main body 11, and the lower automatic correction unit 20 and the upper automatic correction unit 30 are moved once. Can be evacuated. For this reason, workability is extremely improved.

  In the present embodiment, when necessary, the screw portion 12a can be loosened and the engaging pin 12 can be pulled forward to open the lower automatic correction unit 20 and the upper automatic correction unit 30 around the hinge portion 11a. For this reason, maintenance etc. can be performed easily.

  In the sewing machine 50 of the present embodiment, since the edge automatic correction device 10 is provided so as to be retractable or removable before the needle drop position in the sewing machine 1, adjustment of the left and right deviation of the cloth edge position is possible. Is not necessary, the edge automatic correction device 10 can be removed from the sewing machine 50, and can be easily retracted when necessary, such as during maintenance or cloth replacement.

  Therefore, according to the edge edge automatic correction device 10 according to the present embodiment, the position adjustment in the left and right direction of the edge edges of both the fabrics W1, W2 can be automatically and reliably performed in the fabric overlap stitching. In addition, the sewing machine 50 with high merchantability can be obtained in which the lateral position adjustment of the edge portions of both the fabrics W1, W2 can be performed automatically and reliably in the overlap sewing of the fabrics W1, W2.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above-described embodiment, the sewing machine 1 is an overlock sewing machine mainly used for edge stitching. However, the present invention is also applied to a sewing machine that folds and sews one edge of a cloth as in Patent Document 1. The invention can be applied. In this case, the upper automatic correction unit 30 may be retracted or removed.

  In the above embodiment, the upper automatic correction unit 30 is configured to be removable independently, but may be configured to be retractable independently without being removed. Further, the lower automatic correction unit 20 may also be configured by at least a lower feed conveyance unit 21, a lower fabric presser unit 22, and a lower fabric presser drive unit 23 that are configured as a single unit. . Then, the lower automatic correction unit 20 can be removed alone or retracted alone. This makes it easy to retract these when necessary, and the lower automatic correction unit 20 or the upper automatic correction unit 30 can be removed depending on the work contents, such as when sewing one piece of fabric. For this reason, workability is good and it can be used for other models.

  In the above embodiment, the lower feed transport unit 21 and the upper feed transport unit 31 are belt drive mechanisms, but may be realized by other transport means such as a plurality of rollers arranged and driven by a chain or the like.

  In the above embodiment, the lower fabric presser drive unit 23 and the upper fabric presser drive unit 33 are driven by a rotary solenoid. However, the lower fabric presser unit 22 and the upper fabric presser unit 32 are driven up and down by an air cylinder. Alternatively, the flat cam may be driven by a stepping motor to drive the lower and upper fabric presser portions 22 and 32 up and down.

  In the above embodiment, the lower automatic correction unit 20 and the upper automatic correction unit 30 can be retracted by the air cylinder 13 as an actuator. However, actuators other than the air cylinder (for example, a combination of an electric motor and a ball screw) May be configured to be evacuated. Further, at least one of the lower automatic correction unit 20 and the upper automatic correction unit 30 may be configured to be retractable by an actuator.

  In the above embodiment, optical non-contact type sensors are used as the lower side detection unit 24 and the upper side detection unit 34. However, these sensors are not limited to optical types, and any non-contact type sensors may be used. A sensor may be used.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

1 Sewing machine
2 Body
2a Engaging arm
2b U-shaped part
3 Cylinder bed
4 Needle plate
5 Sewing head
7 Sewing needle
8 Arm
9 Presser plate
10 Automatic edge correction device
11 Corrector body
11a Hinge part
11b Guide block
12 Engagement pin
12a Screw part
13 Air cylinder
13a Piston rod
14 Cylinder fixing part
14a Mounting bracket
14b Cylinder guide hole
15 Unit support
15a Cylinder side roller
16 Unit base
16a Supported rod
20 Lower automatic correction unit
21 Lower feed conveyor
21a Lower feed surface
21b Lower conveyor belt
21c Lower drive pulley
21d Lower driven pulley
21e Lower transfer electric motor
21f Lower belt cover
22 Lower fabric presser
22a Lower working end
23 Lower fabric presser drive section
23a Lower presser support pin
23b Lower presser link mechanism
23c Lower presser solenoid
24 Lower detector
24a Light emitting part for lower fabric
24b Light receiving part for lower fabric
25 Sensor mounting bracket
26 Sensor separator
27 Sensor unit
30 Upper automatic correction unit
31 Upper feed conveyor
31a Upper feed surface
31b Upper conveyor belt
31c Upper drive pulley
31d Upper driven pulley
31e Upper transfer electric motor
31f Upper belt cover
32 Upper presser part
32a Upper working end
33 Upper fabric presser drive section
33a Upper presser support pin
33b Upper presser link mechanism
33c Upper presser solenoid
34 Upper side detection part
34a Light emitting part for upper fabric
34b Light receiving part for upper fabric
50 sewing machines
51 Controller (control unit)
52 Main motor
53 Power Source
54 Air source
55 Air valve
W1 Upper fabric
W2 Lower fabric

Claims (7)

Each of the fabrics in the direction substantially perpendicular to the feeding direction of the fabric in the sewing machine is arranged on the front side of the sewing machine that sews the edges of the lower fabric and the upper fabric that have respective edge portions while feeding them in the feeding direction. An edge automatic correction device for automatically correcting deviation from a predetermined position of the edge,
A lower feed conveying unit that is provided in front of the needle drop position of the sewing machine and has a lower feed surface that moves in a direction substantially orthogonal to the feed direction below the feed path of the lower fabric,
A lower cloth presser portion provided above the lower feed conveyance section and having a lower working end facing the lower feed surface across the lower cloth feed path;
The lower action position where the lower action end moves and the lower dough is sandwiched between the lower action face and the lower action position where the lower action end moves and moves away from the lower feed face A lower fabric presser drive unit that moves the lower fabric presser unit at least once between the non-acting position;
A lower detection unit that is disposed in the vicinity of the lower fabric presser and detects the position of the edge of the lower fabric;
An upper feed conveyance unit having an upper feed surface that is provided in front of the needle drop position of the sewing machine and moves in a direction substantially orthogonal to the feed direction above the feed path of the upper fabric;
An upper fabric presser portion provided below the upper feed conveyance unit and having an upper working end facing the upper feed surface across the upper fabric feed path;
Between the upper working position where the upper working end moves to sandwich the upper fabric between the upper feeding surface and the upper non-working position where the upper working end moves and separates from the upper feeding surface An upper fabric presser drive unit that moves the upper fabric presser unit at least once;
An upper side detection unit that is disposed in the vicinity of the upper side fabric presser and detects the position of the edge of the upper side fabric;
Based on the detection of the lower detection unit, the lower fabric press driving unit is operated, and the lower fabric press unit is moved at least once between the lower operation position and the lower non-operation position. A lower control for driving the lower feed conveyance unit to move the lower fabric edge to a predetermined position, and
Based on the detection of the upper detection unit, the upper fabric press driving unit is operated to move the upper fabric press unit at least once between the upper operating position and the upper non-operating position, And a control unit that performs an upper control for driving the upper part and moving the upper fabric edge to a predetermined position. In the edge automatic correction device according to claim 1,
At least the lower feed conveyance unit, the lower fabric presser unit, and the lower fabric presser drive unit constitute a unit and constitute a lower automatic correction unit,
At least the upper feed conveyance unit, the upper fabric presser unit, and the upper fabric presser drive unit constitute a unit to constitute an upper automatic correction unit,
The edge automatic correction device, wherein the lower automatic correction unit and the upper automatic correction unit are configured to be retractable or removable from the sewing machine, respectively. In the edge automatic correction device according to claim 2,
At least one of the lower automatic correction unit and the upper automatic correction unit is configured to be retractable by an actuator. In the edge automatic correction device according to claim 3,
The lower edge automatic correction unit and the upper automatic correction unit are configured to be retractable by expanding and contracting one air cylinder. The edge automatic correction device according to any one of claims 2 to 4,
A hinge part swingably attached to the sewing machine;
An automatic edge correction device having an engagement portion engageable with the sewing machine. In the edge automatic correction device according to any one of claims 1 to 5,
The lower side detection unit and the upper side detection unit are configured as a unit, and the lower cloth presser part and the upper work presser part have a lower working end and a side on which the lower cloth and the upper cloth are inserted rather than the upper working end. An edge automatic correction device characterized by being arranged on the opposite side. A sewing machine, wherein the automatic edge correction device according to any one of claims 1 to 6 is provided so as to be retractable or removable on the front side in the feed direction of a needle drop position in the sewing machine.

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