Sewing machine

Abstract

The invention provides a sewing machine which can easily perform seam test. The sewing machine includes: a needle up-and-down movement mechanism that moves a sewing needle up and down by a sewing machine motor (16); a feeding device (20, 40) for feeding the object (C) to be sewn by using a driving source (25, 26, 45, 46) different from the sewing machine motor (16); a setting input device (96) for setting sewing; and a control device (90) for performing operation control of the needle up-down movement mechanism and the feeding devices (20, 40), the control device (90) executing a seam test mode in which the sewing machine motor (16) is stopped and the feeding operation of the object (C) to be sewn is performed only by the feeding devices.

Description

Technical Field

[0001] The invention relates to a sewing machine. Background Art

[0002] With regard to conventional sewing machines, both the up and down movement of the sewing needle and the feeding action of the sewing object are powered by the sewing machine motor, so it is easy to synchronize the needle drop and the feeding. However, on the other hand, the up and down movement of the sewing needle and the feeding action of the sewing object are linked and cannot be separated (for example, refer to patent document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2015 / 033996 Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In order to perform trial sewing using the above sewing machine, the sewing object can only be actually sewn, and the stitches need to be removed after confirming the quality of the trial sewing. Therefore, trial sewing is a very time-consuming and labor-intensive operation with a high load.

[0008] In addition, since the test sewing workpiece has a hole through which the sewing needle passes, it may be discarded, resulting in a decrease in economic efficiency.

[0009] An object of the present invention is to provide a sewing machine capable of easily performing trial sewing.

[0010] (II) Technical solution

[0011] The sewing machine of the present invention is characterized by comprising:

[0012] A needle up and down moving mechanism, which moves the sewing needle up and down;

[0013] A feeding device for feeding the sewn material;

[0014] A control device for controlling the movement of the needle up and down movement mechanism and the feeding device,

[0015] The control device can execute a trial sewing mode in which the sewing needle is stopped at a non-sewing position and the feeding device is used to feed the sewn object.

[0016] (III) Beneficial effects

[0017] With the above-mentioned structure, the sewing machine of the present invention can perform trial sewing on the sewn object without needle dropping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a rear view of the sewing machine of the embodiment of the invention.

[0019] Figure 2 It is the left side view of the sewing machine.

[0020] Figure 3 It is a three-dimensional diagram of a sewing machine.

[0021] Figure 4 It is a perspective view showing the upper surface of the left end portion of the sewing machine bed portion, with the presser foot leg omitted from illustration.

[0022] Figure 5 It is a three-dimensional view of the guide frame of the lower feed mechanism.

[0023] Figure 6 It is a three-dimensional diagram of the feeding mechanism with four conveyor belts in a front-rear differential feeding state.

[0024] Figure 7 It is a three-dimensional diagram of the feeding mechanism with four conveyor belts in a left and right differential feeding state.

[0025] Figure 8 This is a three-dimensional view of the periphery of the presser mechanism that presses the sewn material from above on the needle plate.

[0026] Fig. 9 This is a rear view of the periphery of the presser foot mechanism.

[0027] Fig.10 It is a three-dimensional diagram of the positioning ruler and its surrounding structure in the use position.

[0028] Fig.11 This is a block diagram showing a control system of a sewing machine.

[0029] Fig.12 This shows an input screen displayed on the input screen of the operation input unit in order to set input setting data.

[0030] Fig.13 Indicates another input screen displayed on the input screen of the operation input unit in order to set input setting data.

[0031] Fig.14 The figure shows a setting screen displayed on the input screen of the operation input unit in order to perform connection setting of a plurality of setting data.

[0032] Fig.15 It is an explanatory diagram showing an example of an imaging element that detects a notch formed in a sewn object as an indicator mark.

[0033] Fig.16 The outer edge shape of the sewn object represented by the outer shape data of the sewn object is shown.

[0034] Fig.17 This is a flowchart of the sewing operation of a sewing machine capable of executing a trial sewing mode.

[0035] Fig.18 This is a top view of the sewing machine which, when the terminal end of the sewing object is detected, performs the operation of sending the sewing object toward the stacking device provided in front.

[0036] Fig.19 (A) indicates a sewn article whose side edge is bent to the left toward the terminal end. Fig.19 (B) shows a sewn article whose side edge portion is bent rightward toward the terminal end.

[0037] Fig. 20 This is a top view of the sewing machine which, when the terminal end of the sewing material is detected, distributes and sends the sewing material toward the left and right stacking devices arranged in front.

[0038] Fig.21 This is a plan view showing an example of a sewn object that is sewn at a plurality of separate locations.

[0039] Fig. 22 The present invention is a top view of a sewing machine that performs idle feeding operation on two separate sewing locations for a sewn object to be sewn at multiple separate locations.

[0040] Fig.23 This is a perspective view showing the upper surface of the left end portion of the sewing machine bed, illustrating an example in which a needle hole is directly formed in a needle plate.

[0041] Description of Reference Numerals

[0042] 11: sewing needle; 12: needle bar; 13: needle hole; 16: sewing machine motor; 20: lower feeding mechanism (feeding device); 21: rear lower left belt; 22: front lower left belt; 23: front lower right belt; 24: rear lower right belt; 25: first motor; 26: second motor; 40: upper feeding mechanism (feeding device); 41: upper left belt; 42: upper right belt; 45: upper left motor; 46: upper right motor; 50: positioning ruler; 57: position adjustment motor; 58: solenoid valve; 70: cloth presser mechanism; 71: presser leg; 73: presser motor; 90: control device; 91: CPU; 94: data storage (storage unit); 941: setting data; 942 : Connection data; 943: Appearance data; 95: Pedal; 96: Operation input unit (setting input device); 961: Input screen; 97: Camera element (sensor); 100: Sewing machine; 101: Needle plate; C, C1, C2: Sewn material; Co: Edge width; D, Dc: Identifier; D1, D2: Feed pitch; G1, G2: Input screen; G3: Setting screen; I1~I4: Icon; K1, K2: Increase / decrease keys; L1, L2: Connecting line; M: Rotation speed; N: Incision; P: Image; Se1~Se3: Interval; T, T1, T2: Stacking device; U1, U2, D1, D2: Feed pitch; W: Pressing force. DETAILED DESCRIPTION

[0043] [Overview of Embodiments of the Invention]

[0044] Hereinafter, the sewing machine 100 according to the embodiment of the present invention will be described in detail.

[0045] Figure 1 1 shows a rear view of the sewing machine 100, Figure 2 1 shows a left side view of the sewing machine 100, Figure 3 A perspective view showing the sewing machine 100 is shown.

[0046] Next, the sewn object C (refer to Fig.10 ) is set as "front", and the upstream side of the feed direction is set as "rear", and in the forward state, the left hand side is set as "left", the right hand side is set as "right", the vertically above is set as "up", and the vertically below is set as "down". The front-to-back direction, the left-right direction, and the up-down direction are orthogonal to each other.

[0047] In the following description, it is assumed that the sewing machine 100 is installed on a horizontal plane, and the front-rear direction and the left-right direction are horizontal.

[0048] As the sewing machine 100 according to the embodiment of the present invention, a lockstitch sewing machine is exemplified.

[0049] The sewing machine 100 includes a sewing machine frame 110, a needle vertical movement mechanism, a lower feed mechanism 20 as a feed device, an upper feed mechanism 40 as a feed device, a cloth presser mechanism 70 as a presser mechanism, a kettle mechanism, and a positioning ruler 50 (see Fig.10 ) and the retreat mechanism 60 (refer to Fig.10 ).

[0050] The needle vertical movement mechanism imparts a vertical movement action to the sewing needle 11 .

[0051] The lower feeding mechanism 20 applies a feeding operation to the workpiece C on the needle plate 101 from below.

[0052] The upper feeding mechanism 40 applies a feeding operation to the workpiece C on the needle plate 101 from above.

[0053] The cloth presser mechanism 70 applies a pressing force to the workpiece C on the needle plate 101 .

[0054] The kettle mechanism captures the thread loop of the upper thread from the sewing needle 11 and winds the lower thread to form a stitch.

[0055] The positioning ruler 50 abuts against the side end of the sewn object and determines the distance from the side end to the seam, that is, the edge width.

[0056] In order to avoid interference when the positioning ruler 50 is used, the retracting mechanism 60 holds the belt guide 44 of the upper feed mechanism 40 in the retracted position.

[0057] In addition, the sewing machine 100 is provided with various structures such as a thread take-up lever mechanism and a thread adjuster which are provided in a general lockstitch sewing machine, but since these are well-known structures, the description thereof will be omitted.

[0058] [Sewing machine stand]

[0059] The sewing machine frame 110 supports or accommodates various structures of the sewing machine 100 .

[0060] The sewing machine frame 110 includes a sewing machine bed portion 111 , a standing machine body portion 112 , and a sewing machine arm portion 113 .

[0061] The sewing machine bed 111 is located at the lower portion of the sewing machine 100 and extends in the left-right direction.

[0062] The upright machine body 112 is uprightly provided from the right end portion of the sewing machine bed 111 .

[0063] The sewing machine arm portion 113 extends toward the left from the upper end portion of the upright body portion 112 .

[0064] [Needle up and down movement mechanism]

[0065] Figure 4It is a perspective view showing the upper surface of the left end portion of the sewing machine bed 111, in which the illustration of a presser foot leg described later is omitted.

[0066] The needle vertical movement mechanism has: a mechanism disposed inside the sewing machine arm 113 in a left-right direction and driven by the sewing machine motor 16 (see Fig.11 ) The upper shaft of the rotation drive.

[0067] In addition, if Figure 1~Figure 4 As shown, the needle vertical movement mechanism comprises: a needle bar 12, which holds the sewing needle 11 at the lower end; and a crank mechanism, which converts the rotation force of the upper shaft into a reciprocating driving force for vertical movement and transmits it to the needle bar.

[0068] In addition, the upper shaft and the crank mechanism are well-known structures, so the description is omitted.

[0069] The needle bar 12 extends in the up-down direction and is supported at the lower left end of the sewing machine arm 113 so as to be able to move up and down.

[0070] The sewing needle 11 is held at the lower end of the needle bar 12 and moves up and down together with the needle bar 12. A needle plate 101 composed of a horizontal flat plate is provided below the needle bar 12 on the upper surface of the sewing machine bed 111.

[0071] Furthermore, a composite opening 102 is formed at the needle drop position of the sewing needle 11 relative to the needle plate 101. In the composite opening 102 of the needle plate 101, the needle hole component 30 having the needle hole 13 and the rear left lower belt 21, the front left lower belt 22, the front right lower belt 23, and the rear right lower belt 24 of the lower feed mechanism 20 described later are exposed upward and arranged. That is, the composite opening 102 is a shape in which a plurality of rectangular openings through which the needle hole component 30 and the lower belts 21 to 24 are exposed are integrally composited.

[0072] [Kettle mechanism]

[0073] like Figure 2 and Figure 3 As shown, the pot mechanism includes an inner pot 14 and an outer pot 15 provided below the needle hole member 30 of the needle plate 101 , and a pot shaft (not shown) for rotating the outer pot 15 .

[0074] The kettle shaft is rotatably supported in the horizontal direction in the sewing machine bed 111. The kettle shaft receives rotation about the horizontal axis at a speed twice that of the upper shaft from the upper shaft via a gear mechanism or a belt mechanism.

[0075] The inner pot 14 is housed inside the outer pot 15. The inner pot 14 houses a bobbin (not shown) for supplying a bobbin thread to the inner side.

[0076] The outer pot 15 is connected to the left end of the pot shaft and rotates around the middle pot 14. The middle pot 14 is restricted from rotating and does not rotate with the outer pot 15. The outer pot 15 has a tip on the outer periphery for catching the thread loop of the upper thread from the sewing needle 11. The outer pot 15 can catch the thread loop of the upper thread with the tip by rotating and pass the lower thread drawn from the inner side of the middle pot 14.

[0077] The outer pot 15 and the middle pot 14 are arranged in a stored state inside a substantially cylindrical guide frame 29 of a lower feed mechanism 20 to be described later.

[0078] [Lower feed mechanism]

[0079] Figure 5 is a perspective view of the guide frame 29 of the lower feed mechanism 20, Figure 6 and Figure 7 It is a perspective view of the lower feeding mechanism 20 . Figure 6 and Figure 7 The following diagram shows a case where the installation states of the lower belts 21 to 24 described later are different.

[0080] The following is based on Figure 1 to Figure 7 The lower feeding mechanism 20 will be described in detail.

[0081] As shown in the drawings, the lower feeding mechanism 20 includes lower belts 21 to 24 as conveyor belts, a first motor 25 , a second motor 26 , rotating shafts 27 and 28 , a first pulley 31 , and a second pulley 32 .

[0082] Furthermore, the lower feeding mechanism 20 includes a guide frame 29 for guiding the lower belts 21 to 24 so as to come into contact with the lower surface of the workpiece C, a first pressing mechanism 33 , and a second pressing mechanism 34 .

[0083] The first motor 25 and the second motor 26 are motors whose motion amounts can be arbitrarily controlled, such as stepping motors or servo motors. The first motor 25 and the second motor 26 are arranged in a front-to-rear manner inside the right end of the sewing machine bed 111 with their output shafts facing leftward.

[0084] A first pulley 31 is connected to the output shaft of the first motor 25 on the front side via a rotating shaft 27 .

[0085] The output shaft of the second motor 26 on the rear side is connected to a second pulley 32 via a rotating shaft 28 .

[0086] The rotating shafts 27 and 28 are both parallel to the left-right direction and are rotatably supported in the sewing machine bed 111 .

[0087] The first pulley 31 and the second pulley 32 are supported rotatably around axes extending in the left-right direction in the left end of the sewing machine bed 111. The first pulley 31 and the second pulley 32 are rotated by the first motor 25 and the second motor 26 via the rotating shafts 27 and 28, respectively.

[0088] The first pulley 31 and the second pulley 32 are arranged to overlap each other when viewed from the front-rear direction, that is, they are at the same height and at the same position in the left-right direction.

[0089] The first pulley 31 and the second pulley 32 can both be provided with all the lower belts 21 , 22 , 23 , and 24 arranged in parallel in the left-right direction.

[0090] That is, the first pulley 31 has a left groove 311 for laying the rear left lower belt 21 and the front left lower belt 22 , and a right groove 312 for laying the front right lower belt 23 and the rear right lower belt 24 , on its outer peripheral surface.

[0091] The second pulley 32 has, on its outer peripheral surface, a left groove 321 for laying the rear left lower belt 21 and the front left lower belt 22 , and a right groove 322 for laying the front right lower belt 23 and the rear right lower belt 24 .

[0092] The width of each lower belt 21-24 is equal, and the left and right grooves 311, 312, 321, 322 are at least twice the width of the belt.

[0093] Thus, each of the lower belts 21 to 24 can be installed by appropriately selecting the first pulley 31 and the second pulley 32 .

[0094] Each of the lower belts 21 , 22 , 23 , 24 is in an endless ring shape and is mounted between the guide frame 29 and the first pulley 31 or between the guide frame 29 and the second pulley 32 .

[0095] In addition, the lower belts 21, 22, 23, and 24 are arranged in order from left to right.

[0096] like Figure 2 As shown, the guide frame 29 (guide member) is arranged to be substantially aligned with the pulleys 31 and 32 in the left-right direction and between the pulleys 31 and 32 in the front-rear direction. The guide frame 29 is arranged above the pulleys 31 and 32 and directly below the needle plate 101.

[0097] like Figure 5 As shown, the guide frame 29 includes a bracket portion 295 for fixing in the sewing machine bed 111 and a cylindrical main body portion 296 for guiding each of the lower belts 21 to 24 .

[0098] The guide frame 29 is disposed directly below the needle plate 101 with the central axis of the main body 296 facing the left-right direction.

[0099] A fitting groove 297 is formed along the front-back direction at the left-right center of the upper outer peripheral surface of the main body 296. A long plate-shaped needle hole component 30 is arranged inside the fitting groove 297. The needle hole component 30 is formed with a needle hole 13 penetrating vertically at the needle drop position.

[0100] The needle hole component 30 is connected to a needle up-and-down moving mechanism (not shown), which uses the aforementioned sewing machine motor 16 as a driving source and moves up and down in the same cycle as the sewing needle 11. The needle hole component 30 uses the needle up-and-down moving mechanism to move up and down in a phase opposite to that of the sewing needle 11. That is, with respect to the formation surface of the needle hole 13 of the needle hole component 30, when the sewing needle 11 is at the lower dead point, the formation surface is at the highest position at the same height as or slightly higher than the upper surface of the needle plate 101, and when the sewing needle 11 is at the upper dead point, the formation surface is at the lowest position at which the drop from the upper surface of the needle plate 101 is the greatest.

[0101] In addition, the main body 296 slides each lower belt 21 to 24 in the circumferential direction on the upper part of its outer peripheral surface to feed the sewn material C. Therefore, the upper part of the outer peripheral surface of the main body 296 is provided with: the first to fourth guide parts 291, 292, 293, 294 for guiding each lower belt 21 to 24.

[0102] The first guide portion 291 is disposed at the left rear of the needle hole 13 , the second guide portion 292 is disposed at the left front of the needle hole 13 , the third guide portion 293 is disposed at the right front of the needle hole 13 , and the fourth guide portion 294 is disposed at the right rear of the needle hole 13 .

[0103] Each guide portion 291-294 is a convex strip extending in the front-to-back direction, and its width in the left-to-right direction is equal to or slightly wider than that of each lower belt 21-24. The rear end of each guide portion 291-294 is a slope whose protrusion amount in the radial direction outward relative to the outer peripheral surface of the main body 296 gradually increases toward the front. In addition, the front end of each guide portion 291-294 is a slope whose protrusion amount in the radial direction outward relative to the outer peripheral surface of the main body 296 gradually decreases toward the front.

[0104] The first guide portion 291 is located on the left side of the pinhole 13 and is located on the rear side of the center of the pinhole 13 along substantially the entire length.

[0105] Furthermore, the first guide portion 291 has a guide surface 291a ( Figure 5The guide surface 291a is located in front of the maximum protrusion of the main body 296 in the radial direction and is flat and horizontal. When viewed from above, the guide surface 291a is configured to face the composite opening 102 of the needle plate 101.

[0106] Furthermore, the guide surface 291 a is set so that the outer side surface of the rear left lower belt 21 that slides in contact with and passes thereon is slightly higher than the upper surface of the needle plate 101 .

[0107] The guide surface 291 a is formed so that the front end portion thereof is slightly rearward of the center of the needle hole 13 , and the rear left lower belt 21 abuts against the workpiece C on the rear side of the center of the needle hole 13 .

[0108] The second guide portion 292 is located on the left side of the needle hole 13 and on the right side of the first guide portion 291 , and is located on the front side of the center of the needle hole 13 along substantially the entire length.

[0109] Furthermore, the second guide portion 292 has a guide surface 292a ( Figure 5 The guide surface 292a is located at the rear side of the maximum protrusion of the main body 296 in the radial direction and is flat and horizontal. When viewed from above, the guide surface 292a is configured to face the composite opening 102 of the needle plate 101.

[0110] Furthermore, the guide surface 292 a is set so that the outer side surface of the front left lower belt 22 that slides in contact with and passes thereon is slightly higher than the upper surface of the needle plate 101 .

[0111] The guide surface 292 a is formed so that its rear end portion is slightly forward of the center of the needle hole 13 , and the front left lower belt 22 abuts against the workpiece C on the forward side of the center of the needle hole 13 .

[0112] The third guide portion 293 is located on the right side of the pinhole 13 and is located on the front side of the center of the pinhole 13 along substantially the entire length.

[0113] Furthermore, the third guide portion 293 has a guide surface 293a ( Figure 5 The guide surface 293a is located at the rear side of the maximum protrusion of the main body 296 in the radial direction and is flat and horizontal. When viewed from above, the guide surface 293a is configured to face the composite opening 102 of the needle plate 101.

[0114] Furthermore, the guide surface 293 a is set so that the outer side surface of the front right lower belt 23 that slides in contact with and passes thereon is slightly higher than the upper surface of the needle plate 101 .

[0115] The guide surface 293 a is formed so that the rear end thereof is slightly forward of the center of the needle hole 13 , and the front right lower tape 23 abuts against the workpiece C on the forward side of the center of the needle hole 13 .

[0116] The fourth guide portion 294 is located to the right of the pinhole 13 and the third guide portion 293 , and is located to the rear of the center of the pinhole 13 along substantially the entire length.

[0117] Furthermore, the fourth guide portion 294 has a guide surface 294a ( Figure 5 The guide surface 294a is located in front of the maximum protrusion of the main body 296 in the radial direction and is flat and horizontal. When viewed from above, the guide surface 294a is configured to face the composite opening 102 of the needle plate 101.

[0118] Furthermore, the guide surface 294 a is set so that the outer side surface of the rear right lower belt 24 that slides in contact with and passes thereon is slightly higher than the upper surface of the needle plate 101 .

[0119] The guide surface 294 a is formed so that the front end portion thereof is slightly rearward of the center of the needle hole 13 , and the rear right lower belt 24 abuts against the workpiece C on the rear side of the center of the needle hole 13 .

[0120] The guide surfaces 291a and 294a are arranged on the rear side of the center of the needle hole 13, and the guide surfaces 292a and 293a are arranged on the front side of the center of the needle hole 13. Therefore, when a speed difference (feeding amount difference) is set between the rear left lower belt 21 and the rear right lower belt 24 on the rear side and the front left lower belt 22 and the front right lower belt 23 on the front side, the lower belts 21 to 24 do not interfere with each other, and a feeding force based on the front and rear feeding speed difference (feeding amount difference) can be applied to the sewn object C. Therefore, a stitch that meets the target of differential feeding in the front and rear directions can be formed, and the sewing quality can be improved.

[0121] The first pressing mechanism 33 applies tension to all the lower belts 21 to 24 that are stretched between the guide frame 29 and the first pulley 31 , thereby suppressing the occurrence of slack.

[0122] like Figure 2 , Figure 3 and Figure 6 As shown, the first pressing mechanism 33 includes a left pressing roller 331 , a right pressing roller 332 , a support plate 333 , and a base block 334 .

[0123] The support plate 333 is in the shape of a flat plate that is long in the front-rear and top-bottom directions, and is supported on the base block 334 in a state where the longitudinal direction thereof faces in the front obliquely upward direction.

[0124] In addition, the support plate 333 supports the left pressure roller 331 and the right pressure roller 332 in a concentric and rotatable manner on the left and right sides of the upper end thereof. The support plate 333 is configured so that the left pressure roller 331 and the right pressure roller 332 abut from the rear and lower sides relative to the outer side surface of the belt stretched between the guide frame 29 and the first pulley 31.

[0125] The base block 334 is used in common with the second pressurizing mechanism 34 described later, and supports the structure of the first pressurizing mechanism 33 and the second pressurizing mechanism 34. The base block 334 is fixedly installed below the guide frame 29 in the sewing machine bed 111.

[0126] The support plate 333 has a long hole along its length direction, and is fastened to the base block 334 by two bolts inserted through the long hole. The length direction of the support plate 333 is oriented in a direction substantially orthogonal to the belt stretched on the first pulley 31. Therefore, the pressing force of the left pressure roller 331 and the right pressure roller 332 on the belt can be adjusted by loosening the bolts and moving the support plate 333 along the long hole. In other words, the tension of the belt stretched between the guide frame 29 and the first pulley 31 can be adjusted.

[0127] The left pressure roller 331 and the right pressure roller 332 have the same outer diameter and are supported by the support plate 333 so as to be rotatable around the same axis in the left-right direction. In addition, the left and right widths of the left and right pressure rollers 331 and 332 are both more than twice the width of each lower belt 21 to 24.

[0128] Thus, the left pressure roller 331 can come into contact with both the rear left lower belt 21 and the front left lower belt 22 stretched between the guide frame 29 and the first pulley 31 .

[0129] Likewise, the right pressure roller 332 can come into contact with both the front right lower belt 23 and the rear right lower belt 24 stretched between the guide frame 29 and the first pulley 31 .

[0130] The second pressing mechanism 34 applies tension to all the lower belts 21 to 24 that are stretched between the guide frame 29 and the second pulley 32 , thereby suppressing the occurrence of slack.

[0131] like Figure 2 , Figure 3 and Figure 6 As shown, the second pressing mechanism 34 includes: a left pressing roller 341 , a right pressing roller 342 , a support plate 343 , and the aforementioned base block 334 .

[0132] The support plate 343 has the same structure as the aforementioned support plate 333 and is supported on the base block 334 in a state where the longitudinal direction thereof faces the rearward and upward direction.

[0133] In addition, the support plate 343 supports the left pressure roller 341 and the right pressure roller 342 concentrically and rotatably on the left and right sides of the upper end thereof. The support plate 343 is configured so that the left pressure roller 341 and the right pressure roller 342 abut against the outer side surface of the belt stretched between the guide frame 29 and the second pulley 32 from the rear and above.

[0134] The support plate 343 also has a long hole, and the support plate 343 can be moved along the long hole. Thus, the pressing force of the left pressure roller 341 and the right pressure roller 342 on the belt stretched on the second pulley 32 can be adjusted. Therefore, the tension of the belt stretched between the guide frame 29 and the second pulley 32 can be adjusted.

[0135] The left pressure roller 341 and the right pressure roller 342 have the same outer diameter and are supported by the support plate 343 so as to be rotatable around the same axis in the left and right directions. In addition, the left and right widths of the left and right pressure rollers 341 and 342 are more than twice the width of each lower belt 21 to 24.

[0136] Thus, the left pressure roller 341 can come into contact with both the rear left lower belt 21 and the front left lower belt 22 stretched between the guide frame 29 and the second pulley 32 .

[0137] Likewise, the right pressure roller 342 can come into contact with both the front right lower belt 23 and the rear right lower belt 24 that are stretched between the guide frame 29 and the second pulley 32 .

[0138] The left pressure roller 331 of the first pressure mechanism 33 and the left pressure roller 341 of the second pressure mechanism 34 can both abut against the rear left lower belt 21 and the front left lower belt 22. Similarly, the right pressure roller 332 of the first pressure mechanism 33 and the right pressure roller 342 of the second pressure mechanism 34 can both abut against the front right lower belt 23 and the rear right lower belt 24.

[0139] Therefore, even if each of the lower belts 21 to 24 is stretched over the first pulley 31 and the second pulley 32 , tension can be applied by either the first pressurizing mechanism 33 or the second pressurizing mechanism 34 .

[0140] Figure 6 The figure shows a state where the front left lower belt 22 and the front right lower belt 23 fed on the front side of the needle drop position are stretched over the first pulley 31 , and the rear left lower belt and the rear right lower belt 21 , 24 fed on the rear side are stretched over the second pulley 32 .

[0141] Figure 7 The figure shows a state where the rear left lower belt 21 and the front left lower belt 22 fed to the left side of the needle drop position are stretched over the first pulley 31 , and the front right lower belt 23 and the rear right lower belt 24 are stretched over the second pulley 32 .

[0142] If the bolts are loosened and the pressure rollers 331 , 332 , 341 , 342 are retracted, the lower belts 21 to 24 can be easily removed from the pulleys 31 , 32 and replaced.

[0143] Therefore, it is easy to select and proceed: Figure 6 Sewing in the erected state, and Figure 7 Sewing in the erected state.

[0144] For example, in Figure 6 In the erected state (set to the front and rear differential feeding state), the so-called pleating sewing can be performed in which the front side is fed faster than the rear side relative to the needle drop position.

[0145] In addition, in the front-rear differential feeding state, it is also possible to perform sewing in which tension is applied to the sewn material C by feeding the front side slower than the rear side with respect to the needle drop position.

[0146] exist Figure 7 In the erection state (set to the left and right differential feeding state), if the left side is fed faster, right-bend curve sewing can be performed, and if the right side is fed faster, left-bend curve sewing can be performed.

[0147] In addition, the curvature can be changed according to the magnitude of the speed difference (feeding amount difference) between the left and right sides, so various curved sewing can be performed.

[0148] [Cloth presser foot mechanism]

[0149] Figure 8 1 is a perspective view of a cloth presser mechanism 70 as a presser mechanism for pressing a workpiece C from above on a needle plate 101. Fig. 9 is the rear view. In addition, Figure 8 The illustration of the positioning ruler 50 and its supporting mechanism 53 described later are omitted.

[0150] The cloth presser mechanism 70 includes a presser leg 71, a presser rod 72, a mounting base 74, and a presser motor 73 (see Fig.11 ), as a height sensor 762 for detecting the presser foot height (refer to Fig.11 ).

[0151] The presser bar 72 is disposed in front of the needle bar 12, and is supported in the vertical direction inside the sewing machine arm portion 113 so as to be movable up and down.

[0152] The upper end of the presser bar 72 is pressed downward by a presser spring (not shown) inside the sewing machine arm 113. The expansion and contraction amount of the presser spring can be adjusted by a presser motor whose movement amount can be arbitrarily controlled. Therefore, the pressing force of the presser leg 71 can be arbitrarily set by controlling the presser motor.

[0153] The presser motor also performs a lifting motion to switch the presser leg 71 between a pressing height for pressing the workpiece C on the needle plate 101 and a release height for separating upward.

[0154] In addition, a height sensor 762 for detecting the height of the presser bar 72 is provided together. Therefore, after the pressing force of the presser leg 71 is set to a predetermined value, when the height of the presser leg 71 changes due to a change in the thickness of the sewn material C, the presser motor is controlled to keep the expansion and contraction amount of the presser spring unchanged, so that the pressing force can be maintained at a constant set value.

[0155] The presser foot leg 71 is mounted on the lower end of the presser foot bar 72 via a mounting platform 74. The mounting platform 74 is a block with a horizontal and flat upper surface and a lower surface. The mounting platform 74 is formed with an insertion hole that can be inserted into the presser foot bar 72 in a vertically penetrating manner. The mounting platform 74 is fixed to the lower end of the presser foot bar 72 by, for example, tightening a screw.

[0156] Furthermore, a lower end portion of a link member 474 of the upper feed mechanism 40 described later is connected to the front end portion of the mounting table 74 so as to be rotatable around an axis extending in the left-right direction.

[0157] The presser leg 71 is disposed above the composite opening 102 of the needle plate 101. The presser leg 71 presses the sewing object C from above so that the conveying force of each lower belt 21 to 24 is appropriately transmitted to the sewing object C. In addition, the presser leg 71 supports the upper left belt 41 and the upper right belt 42 of the upper feed mechanism 40 in a manner that allows conveyance. In addition, the presser leg 71 also has the following function: press each upper belt 41, 42 to the sewing object C so that the conveying force is appropriately transmitted to the sewing object C.

[0158] like Figure 8 and Fig. 9 As shown, the presser leg 71 includes a bottom plate 711 for pressing the workpiece C from above, and a connecting portion 712 attached to the lower end of the presser bar 72 .

[0159] The bottom plate 711 has a so-called boat shape in which the bottom surface is smooth and the upstream side (rear end portion) in the cloth feeding direction is tilted upward.

[0160] The connecting portion 712 is vertically provided on the upper surface of the front end of the bottom plate 711, and is connected to the bottom plate 711 in a manner that allows it to swing to a certain extent around an axis in the left-right direction. The upper portion of the connecting portion 712 is fixed to the lower side of the mounting platform 74, for example, by screwing. In addition, the connecting portion 712 may be joined to the mounting platform 74 by welding or the like, or may be composed of a single component formed by integrating the connecting portion 712 and the mounting platform 74.

[0161] [Upper feed mechanism]

[0162] like Figure 1 , Figure 2 , Figure 8 and Fig. 9As shown, the upper feeding mechanism 40 includes: an upper left belt 41 and an upper right belt 42 serving as conveyor belts, the aforementioned left and right belt guides 43, 44, an upper left motor 45 serving as a driving source for feeding the upper left belt 41, an upper right motor 46 serving as a driving source for feeding the upper right belt 42, and a guiding mechanism 47 for guiding each upper belt 41, 42 from each upper motor 45, 46 to the presser foot 71.

[0163] The left and right belt guides 43 and 44 are installed on the left and right sides of the presser foot leg 71.

[0164] The belt guides 43 and 44 are rotatably mounted on left and right side surfaces of the lower portion of the connecting portion 712 of the presser leg 71 by a support shaft (not shown) extending in the left-right direction.

[0165] When viewed from the side, the front end of each belt guide 43, 44 extends obliquely upward toward the front, and the rear end is in a shape that is suspended obliquely upward toward the rear near the rear end, closest to the needle plate 101. In addition, each belt guide 43, 44 is provided at the rear end with a feed roller 432, 442 that can rotate using an axis along the left-right direction.

[0166] The left and right endless ring-shaped upper belts 41 and 42 are guided so as to pass between the left and right belt guides 43 and 44 and the side surface of the presser foot leg 71. That is, the left and right upper belts 41 and 42 are respectively folded downward along the outer circumference from the upper part of the feed rollers 432 and 442, and are guided so as to move forward along the portion of each belt guide 43 and 44 closest to the needle plate 101, and then are separated in the obliquely upward direction forward. When each upper belt 41 and 42 moves forward along the portion of each belt guide 43 and 44 closest to the needle plate 101, it contacts the sewn object C on the needle plate 101 and is fed forward.

[0167] In addition, in a plan view, the contact position of the workpiece C of the left upper belt 41 overlaps with the contact position of the workpiece C of the front left lower belt 22, and the workpiece C is fed in a sandwiched manner by these belts.

[0168] Similarly, in a plan view, the contact position of the workpiece C of the right upper belt 42 overlaps with the contact position of the workpiece C of the front right lower belt 23, and the workpiece C is fed in a sandwiched manner by these belts.

[0169] As described above, each of the belt guides 43 and 44 is axially supported by the presser foot leg 71 by means of a support shaft. One end of a tension spring 433 and 443 as a spring is connected to the shaft portion 434 and 444 provided at the front end portion of each of the belt guides 43 and 44. The other end of each of the tension springs 433 and 443 is connected to the shaft portions 745 and 746 provided at the left and right side portions of the mounting base 74, respectively, and each of the tension springs 433 and 443 applies tension to the front end portion of each of the belt guides 43 and 44 upward.

[0170] Therefore, the rear end side of each belt guide 43, 44 is applied with downward rotation, and the upper belts 41, 42 that move forward along the portion closest to the needle plate 101 are given a pressing force toward the needle plate 101. Therefore, the upper belts 41, 42 are given a pressing force toward the sewing material C on the needle plate 101.

[0171] The left and right upper motors 45 and 46 use motors whose rotation speed can be controlled, for example, a DC motor, an AC motor, a stepping motor, etc.

[0172] The upper left motor 45 is supported on the front side of the left end portion of the sewing machine arm 113 via a motor bracket 451 in a state where the output shaft faces leftward.

[0173] The upper right motor 46 is supported above the upper left motor 45 via a motor bracket 451 on the front side of the left end portion of the sewing machine arm 113 in a state where the output shaft faces leftward.

[0174] Furthermore, a motor pulley 452 is attached to the output shaft of the upper left motor 45 , and one end of the upper left belt 41 is wound around the motor pulley 452 .

[0175] Furthermore, a motor pulley 462 is attached to the output shaft of the upper right motor 46 , and one end of the upper right belt 42 is wound around the motor pulley 462 .

[0176] The upper left belt 41 is in an endless loop, one end of which is stretched on the motor pulley 452 of the upper left motor 45 , and the other end of which is stretched on the feed roller 432 of the belt guide 43 .

[0177] The upper right belt 42 is also in an endless loop, with one end in an extended loop state being mounted on a motor pulley 462 of the upper right motor 46 , and the other end being mounted on a feed roller 442 at the rear end of the belt guide 44 .

[0178] Furthermore, when viewed from the left-right direction, the path from the motor pulley 452 of the upper left belt 41 to the feed roller 432 and the path from the motor pulley 462 of the upper right belt 42 to the feed roller 442 overlap except for the peripheries of the motor pulleys 452 and 462. In addition, the upper right belt 42 is arranged on the right side relative to the upper left belt 41.

[0179] The guide mechanism 47 guides the upper left belt 41 and the upper right belt 42 along the above-mentioned paths.

[0180] The guide mechanism 47 includes: a pair of first tension rollers 471 arranged on the left and right, a pair of second tension rollers 472 arranged on the left and right, a guide arm 475 composed of upper and lower link parts 473 and 474, and a plurality of guide rollers 476 rotatably arranged at each part on the path of each upper belt 41 and 42.

[0181] The pair of first tension rollers 471 is disposed below the motor pulley 452 . In addition, the pair of second tension rollers 472 is disposed between the motor pulley 452 and the pair of first tension rollers 471 .

[0182] The pair of first tension rollers 471 are rotatable about an axis extending in the left-right direction and have a wide axial width. The pair of first tension rollers 471 press against both the left upper belt 41 and the right upper belt 42 from the outside to apply tension inward thereto.

[0183] The pair of second tension rollers 472 can rotate around an axis along the left-right direction and has a narrow axial width. The pair of second tension rollers 472 is pressed only from the inside with respect to the right upper belt 42 to apply tension toward the outside.

[0184] In addition, since the upper right belt 42 is expanded to the left and right sides by the pair of second tension rollers 472 , interference with the motor pulley 452 located in the middle of the path can be avoided.

[0185] One end of the upper link member 473 constituting the guide arm 475 is connected to the lower end of the motor bracket 451 in a manner that allows rotation around an axis in the left-right direction. In addition, the other end of the upper link member 473 is connected to one end of the lower link member 474 in a manner that allows rotation around an axis in the left-right direction.

[0186] Furthermore, as described above, the other end of the lower link member 474 is connected to the front end of the mounting base 74 so as to be rotatable around an axis extending in the left-right direction.

[0187] At the connection portion between the upper link member 473 and the lower link member 474, there are provided: a guide roller 476 that abuts from the front side on the inner side of the ring relative to the upper left belt 41 and the upper right belt 42, and a guide roller (not shown) that abuts from the front side on the outer side of the ring.

[0188] Thus, the left and right upper belts 41 and 42 can be conveyed using the path along the upper link member 473 and the path along the lower link member 474 .

[0189] Therefore, the presser foot leg 71 is raised and lowered according to the change in thickness and unevenness of the sewn material C, and even when the bending angles of the upper link member 473 and the lower link member 474 change, the left and right upper belts 41 and 42 can maintain the path along the upper link member 473 and the path along the lower link member 474. Therefore, the path length of each upper belt 41 and 42 can be maintained constant, and the change in tension can be suppressed.

[0190] [Positioning ruler]

[0191] The positioning ruler 50 is used to position the side end of the sewn article C in a direction (left-right direction) perpendicular to the feeding direction of the sewn article C. The positioning ruler 50 is preferably positioned in a direction perpendicular to the feeding direction of the sewn article C, but is not limited thereto and may be inclined to a certain degree relative to the perpendicular direction.

[0192] Fig.10 It is a three-dimensional diagram of the positioning ruler 50 and its surrounding structure in the use position.

[0193] like Fig.10 As shown, the positioning ruler 50 is supported by a supporting mechanism 53 .

[0194] The positioning ruler 50 is a plate for abutting against the side end (the right end in this embodiment) of the sewn article C on the needle plate 101, thereby performing sewing at a constant interval along the side end (so-called edge sewing). In the following description, the constant interval of the edge sewing performed along the side end of the sewn article C is referred to as "edge width".

[0195] The positioning ruler 50 is switched between the following positions by the support mechanism 53: a use position in which the positioning ruler 50 is close to or in contact with the upper surface of the needle plate 101, and a non-use position in which the positioning ruler 50 is separated upward from the upper surface of the needle plate 101. Here, the positions and directions of the various parts of the positioning ruler 50 are described on the premise that the positioning ruler 50 is in the use position.

[0196] The positioning ruler 50 includes a contact plate 51 that contacts the side end of the workpiece C, and a connecting portion 52 that extends from the contact plate 51 toward the support mechanism 53. The contact plate 51 and the connecting portion 52 are formed by bending a single metal plate.

[0197] The abutment plate 51 is in the shape of a flat plate parallel to the front-back up-down direction, and its left side is the abutment surface of the sewn object C. When viewed from the side, the abutment plate 51 is generally rectangular, and the front-back direction is the long dimension.

[0198] The lower edge of the abutment plate 51 is linear and horizontal along the front-rear direction when in the use position, and can abut against or approach the upper surface of the needle plate 101 along the entire length of the lower edge.

[0199] When in the use position, the front end portion of the abutment plate 51 is preferably at the same position as the needle hole 13 or at the front side thereof in the front-rear direction.

[0200] The distance from the center of the needle hole 13 to the left side of the abutment plate 51 in the left-right direction is the edge width during sewing. The distance from the center of the needle hole 13 to the left side of the abutment plate 51 in the left-right direction can be adjusted by the support mechanism 53.

[0201] In addition, the abutment plate 51 is configured so that the left side is closer to the right side than the center of the needle hole 13. And the abutment plate 51 can be adjusted in position so that the left side of the abutment plate 51 is close to the position closest to the center of the needle hole 13 in the left-right direction without interfering with the sewing needle 11 and the presser foot leg 71.

[0202] The support mechanism 53 includes a holding shaft 54 ​​for holding the positioning ruler 50 , a cylindrical body 55 for inserting and holding the holding shaft 54 ​​, a rotating arm 56 for holding the cylindrical body 55 , and an actuator (not shown) as a driving source for imparting a rotating motion to the rotating arm 56 .

[0203] The support mechanism 53 rotates the positioning ruler 50 to switch between the use position and the non-use position.

[0204] The holding shaft 54 ​​is supported by a cylindrical body 55 so as to be movable in the left-right direction. The cylindrical body 55 can be moved by a position adjustment motor 57 (see Fig.11 ) The abutment plate 51 of the positioning ruler 50 is adjusted to an arbitrary position in the left-right direction via the retaining shaft 54.

[0205] The rotating arm 56 can be rotated by a position switching cylinder as an actuator, so that the positioning ruler 50 can be switched between the use position and the non-use position.

[0206] In the non-use position, the positioning ruler 50 is separated upward from the needle plate 101 . In the use position, the positioning ruler 50 is brought into contact with or close to the upper surface of the needle plate 101 by the rotation of the rotating arm 56 .

[0207] [Evacuation mechanism]

[0208] When feeding the sewn material, the left and right tape guides 43 and 44 are located at the feeding position where the bottom of the rear end portion is at the height of the upper surface of the needle plate 101.

[0209] When sewing using the positioning ruler 50 is performed, the retracting mechanism 60 moves the tape guide 44 and the feed roller 442 on the right side of the positioning ruler 50 with respect to the needle hole 13 and the upper right tape 42 guided by them to the retracted position.

[0210] like Figure 8 , Fig.10 As shown, the retraction mechanism 60 includes: a retaining member 61 for retaining the right-side belt guide 44 in the retracted position, a support shaft 62 for rotatably supporting the upper end of the retaining member 61, and a torsion coil spring (torsion spring) 63 as an elastic member for urging the rotating end of the retaining member 61 toward a specified position side (front side).

[0211] The holding member 61 has a recessed portion 611 formed at the rotation end portion.

[0212] In addition, an operation piece 612 is formed on the front side of the lower end portion of the holding member 61 so as to stand upright to the right by being bent.

[0213] When the operation piece 612 pushing the lower end of the holding member 61 is rotated backward while the front end of the belt guide 44 is pressed to bring it to the retracted position, the holding member 61 can fit the shaft 444 into the recess 611 from below. Thus, the belt guide 44 is held in the retracted position.

[0214] To return the belt guide 44 to the feeding position, it is sufficient to press the front end of the belt guide 44 or pull up the rear end. This disengages the shaft 444 engaged in the recess 611, and the holding member 61 rotates backward by the torsion coil spring 63. Therefore, the belt guide 44 can also be returned to the feeding position.

[0215] [Use of sewing machine]

[0216] The sewing machine 100 having the above-described structure can perform sewing with upper tape feeding and lower tape feeding.

[0217] In this case, the lower feeding mechanism 20 is Figure 6 The lower belts 21 to 24 are arranged in a manner such that sewing can be performed with feeding at different speeds on the front and rear sides of the needle hole 13.

[0218] In addition, the lower feeding mechanism 20 is Figure 7 The lower belts 21 to 24 are arranged in a manner such that sewing can be performed with different feeding speeds on the left and right sides of the needle hole 13.

[0219] On the other hand, when edge sewing is performed along the right end of the workpiece C, the front end of the right tape guide 44 is pressed to move from the feeding position to the retracted position, and the retracted position is maintained by the retracting mechanism 60 .

[0220] Then, the actuator of the support mechanism 53 of the positioning ruler 50 is driven to move the positioning ruler 50 from the non-use position to the use position.

[0221] Thus, the sewing is performed with the target seam allowance width by feeding the sewing object C while the right end of the sewing object C is always in contact with the left surface of the abutment plate 51 of the positioning ruler 50 .

[0222] [Sewing machine control system]

[0223] Fig.11 1 is a block diagram showing a control system of the sewing machine 100 .

[0224] As shown in the figure, the sewing machine 100 is provided with a control device 90 for controlling the motion of each structure. In addition, the control device 90 is connected to the sewing machine motor 16, the presser foot motor 73, the first motor 25, the second motor 26, the upper left motor 45, the upper right motor 46, and the position adjustment motor 57 via the motor drive circuits 16a, 73a, 25a, 26a, 45a, 46a, and 57a.

[0225] In addition, the sewing machine motor 16, the presser foot motor 73, the first motor 25, the second motor 26, the upper left motor 45, the upper right motor 46, and the position adjustment motor 57 are provided together with encoders 161, 732, 251, 261, 453, 461, and 571 for detecting the rotation speed thereof. These encoders 161, 732, 251, 261, 453, 461, and 571 are also connected to the control device 90 via the motor drive circuits 16a, 73a, 25a, 26a, 45a, 46a, and 57a.

[0226] The control device 90 is connected to the electromagnetic valve 58 via a drive circuit 58 a , and the electromagnetic valve 58 actuates a position switching air cylinder that switches the positioning ruler 50 between a use position and a non-use position.

[0227] The control device 90 includes a CPU 91 , a ROM 92 , a RAM 93 , and a data memory 94 , and executes various operation controls described below.

[0228] The ROM 92 stores basic system programs.

[0229] In addition, various data and programs described later are stored in the data memory 94. In addition, the data memory 94 is composed of a nonvolatile semiconductor memory such as a flash memory, EEPROM, or EPROM, but a storage device such as a HDD may also be used.

[0230] The CPU 91 executes various programs in the ROM 92 and the data memory 94. The RAM 93 is a memory serving as a work area of ​​the CPU 91.

[0231] Furthermore, the control device 90 is connected to an operation input unit 96 as a setting input device via an interface 96 a .

[0232] The operation input unit 96 includes an input screen 961 that displays information required for inputting various settings. The operation input unit 96 is composed of a so-called touch panel or touch screen that has a touch sensor on the input screen 961. However, the display screen and the operation input unit may also be separate structures.

[0233] The control device 90 and the pedal 95 are connected via an interface 95a, and the pedal 95 is operated by stepping on to input the start and stop of sewing, the increase and decrease of the sewing speed, and other instructions.

[0234] In addition, the control device 90 is connected to the height sensor 762 via the interface 762 a , and the height sensor 762 detects the height of the presser leg 71 .

[0235] [Setting data related to sewing]

[0236] The sewing machine 100 can set the input setting data 941 (see Fig.11 ), the setting data 941 determines various settings related to sewing. The operator can set a plurality of setting data 941 with different setting contents by operating the input unit 96, and each setting data 941 can be recorded in the data memory 94. That is, the data memory 94 can function as a storage unit, and the storage unit can store a plurality of setting data that determine settings for sewing.

[0237] An identifier can be set for each of the setting data 941 recorded in the data memory 94 , and a specific setting data 941 can be selected using the identifier.

[0238] The CPU 91 of the control device 90 controls each unit of the sewing machine 100 to perform sewing according to the setting contents of the selected setting data 941 .

[0239] Fig.12 and Fig.13 Input screens G1 and G2 displayed on the input screen 961 of the operation input unit 96 for setting the input setting data 941 are shown.

[0240] The input screens G1 and G2 can be displayed by switching between them.

[0241] exist Fig.12 The identifier D of the setting data is displayed in the upper left corner of the input screen G1, and the setting values ​​of the feed spacing U1 (feed amount for each stitch) of the upper left belt 41 based on the upper left motor 45 and the feed spacing U2 of the upper right belt 42 based on the upper right motor 46 are displayed in the upper center of the input screen G1.

[0242] As described above, the following state can be set: the front left lower belt 22 and the front right lower belt 23 are stretched on the first pulley 31 of the first motor 25, and the rear left lower belt 21 and the rear right lower belt 24 are stretched on the second pulley 32 of the second motor 26 ( Figure 6 : front and rear differential feed status).

[0243] Alternatively, the following state can be set: the rear left lower belt 21 and the front left lower belt 22 are stretched on the first pulley 31 of the first motor 25, and the front right lower belt 23 and the rear right lower belt 24 are stretched on the second pulley 32 of the second motor 26 ( Figure 7 : Left and right differential feed status).

[0244] At the lower center of the input screen G1, it is displayed: which state is the front-rear differential feed state or the left-right differential feed state, and the set values ​​of the feed spacing D1 of each belt based on the first motor 25 and the feed spacing D2 of each belt based on the second motor 26 are displayed.

[0245] Furthermore, the display indicating the front and rear differential feed state is the connection line L1 in the input screen G1, and the display indicating the left and right differential feed state is the connection line L2 in the input screen G1. In the case of indicating the front and rear differential feed state, only the connection line L1 in the input screen G1 is displayed, and the connection line L2 is not displayed. In the case of indicating the left and right differential feed state, the connection line L1 in the input screen G1 is not displayed, and only the connection line L2 is displayed.

[0246] On the right side of the input screen G1, increase and decrease keys K1 and K2 are displayed for setting and inputting the feed pitch of each belt.

[0247] When setting and inputting the feed pitches U1 , U2 , D1 , and D2 , each display field is selected by touch operation or the like, and then the increase and decrease keys K1 and K2 are used to input a numerical value.

[0248] exist Fig.13 The input screen G2 displays a symbol D in the upper left corner of the screen, and displays the set value of the rotation speed M (sewing speed) of the sewing machine motor 16 during sewing in the middle right portion of the screen.

[0249] The input screen G2 is displayed at the lower right center of the screen, showing the set value of the pressing force W of the presser leg 71 by the presser motor 73 , and at the lower right center of the screen, showing the set value of the edge width Co of the positioning ruler 50 .

[0250] Regarding the rotation speed M, pressing force W, and edge width Co of the sewing machine motor 16, when each display field is selected by touch operation or the like, a numerical value input key is displayed, and numerical value setting can be performed.

[0251] As described above, the setting data 941 inputted through the input screens G1 and G2 is recorded in the data memory 94 together with the identifier.

[0252] Furthermore, each recorded setting data can be selected and read out by the identifier.

[0253] If an instruction to execute sewing based on the read setting data 941 is input from the operation input unit 96, the CPU 91 controls the presser foot motor 73 to press the sewn object on the needle plate 101 with the set value of the pressing force W, and controls the position adjustment motor 57 to position the abutment plate 51 to the position of the set value of the edge width Co, and activates the position switching cylinder through the solenoid valve 58 to switch the positioning ruler 50 to the use position.

[0254] In addition, CPU91 starts to rotate the sewing machine motor 16 at the set value of the rotational speed M, and drives the upper left motor 45, the upper right motor 46, the first motor 25, and the second motor 26 at their respective feed intervals U1, U2, D1, and D2 at the specified upper shaft angle for each stitch, thereby feeding the sewn material.

[0255] [Setting data link]

[0256] The recorded plurality of setting data 941 can be linked together to execute sewing.

[0257] Fig.14 The setting screen G3 displayed on the input screen 961 of the operation input unit 96 in order to perform connection setting of a plurality of setting data 941 is shown.

[0258] According to the setting screen G3, the input of setting data 941 can be selected by the identifier D in the order of sewing. The inputted plurality of setting data 941 is recorded in the data memory 94 (refer to Fig.11 ).

[0259] Furthermore, the connection data 942 may include a plurality of identical setting data 941 .

[0260] In the upper left portion of the setting screen G3, an identifier Dc of the connection data 942 is displayed. In the center of the screen, icons I1 to I4 representing a plurality of connected setting data 941 are displayed in the order of execution. Inside each icon I1 to I4, an identifier of the setting data 941 is displayed.

[0261] In addition, a setting button B is displayed below each icon I1 to I4, and the setting button B sets whether to perform thread trimming when switching from each setting data 941 to the next setting data 941. Inside each button B, when thread trimming is not performed, a pattern of a sewing needle in the upper stop is displayed, and when thread trimming is performed, a pattern of scissors is displayed.

[0262] In addition, when sewing is performed based on the connection data 942, it is necessary to set a trigger for switching from each setting data 941 to the next setting data 941. Regarding this trigger, it is possible to cite: switching caused by the operator's input, automatic switching caused by satisfying a specified condition, switching caused by detecting an indication mark set on the sewn object, etc.

[0263] The conversion caused by the operator's input is, for example, a conversion caused by input of a conversion command from the pedal 95 or the operation input unit 96 .

[0264] The automatic switching caused by satisfying a predetermined condition is, for example, switching caused by setting the number of stitches to be sewn according to each setting data 941 and performing sewing of the set number of stitches.

[0265] The so-called conversion caused by detecting the indicator mark set on the sewn object is, for example, the following situation. Fig.15 As shown in the sewing workpiece C, a notch N is formed as an indicator mark, and an imaging element 97 capable of detecting the notch N at the needle drop position is mounted in the sewing machine 100. And, as sewing proceeds, when the notch N is detected at the needle drop position by the imaging element 97, conversion is performed.

[0266] In addition, the sewn article C is not limited to the incision N, and may be a mark written with a pen or the like, a label, or the like that can be detected visually or optically.

[0267] In addition, the detection of the notch N and the mark is not limited to the imaging element 97, and may be performed using other sensors.

[0268] [Acquisition of external shape data]

[0269] The outer shape data indicating the shape of the outer edge of the sewn object included in the cutting pattern data of the sewn object can be acquired.

[0270] If the shape data 943 is recorded in the data memory 94 , the sewing machine 100 can allocate setting data to each of a plurality of sections of the shape represented by the shape data 943 .

[0271] Fig.16The outer edge shape of the sewn object represented by the outer shape data of the sewn object C is shown. The outer edge shape of the sewn object C is composed of a plurality of sections Se1 to Se3 with different shapes such as a straight line shape, a curve shape, and an arc shape. In this case, the CPU 91 extracts the sections of each shape of the outer edge of the sewn object C from the outer shape data, and accepts the input of the setting data according to the section.

[0272] At this time, if Fig.12 As shown, at the lower left of the input screen G1, an image P of the external shape of the sewn object C based on the external shape data is displayed, and the section in the image P of the external shape is also displayed by a dotted line St.

[0273] And, for Fig.16 The sewn article C is extracted, and the intervals Se1 to Se3 are extracted. The setting data 941 described above are input according to each interval. Then, the CPU 91 connects the setting data 941 according to the arrangement order of the intervals to generate connection data 942.

[0274] [Trial sewing mode setting]

[0275] The sewing machine 100 can execute the trial sewing mode according to the setting from the operation input unit 96 .

[0276] If the trial sewing mode is set, the CPU 91 of the control device 90 controls the lower feed mechanism 20, the upper feed mechanism 40, the cloth presser mechanism 70 and the positioning ruler 50 in the same manner as during sewing, according to the setting of the setting data 941, and performs sewing actions other than needle drop. In addition, the sewing machine motor 16 remains in a stopped state, and the sewing needle remains in the upper stop position as the non-sewing position that has not reached the sewn object.

[0277] By actually setting the sewn material at the needle drop position and executing the trial sewing mode, the cloth feeding action based on the setting data 941 can be observed without needle drop, and it can be determined whether the setting content of the setting data 941 is appropriate.

[0278] Fig.17 The flowchart of the sewing operation executed by the CPU 91 of the control device 90 in the sewing machine 100 capable of executing the trial sewing mode is shown.

[0279] Hereinafter, the sewing operation of the sewing machine 100 will be described based on the above-mentioned flowchart.

[0280] Here, an example is shown in which the operation is performed based on the connection data 942 set by the operator through the operation input unit 96 for each section.

[0281] The CPU 91 of the control device 90 first reads each setting data 941 included in the connection data 942 (step S1 ).

[0282] Then, based on the initial setting data 941, the position adjustment motor 57 is controlled to align the abutment plate 51 with the position having the set edge width, and the electromagnetic valve 58 of the position switching cylinder is controlled to lower the abutment plate 51 onto the needle plate 101 (step S3).

[0283] Next, when the operator steps on the pedal 95 (step S5), the CPU 91 determines whether the trial sewing mode is set (step S7). If the trial sewing mode is not set, the sewing machine motor 16 is driven to the rotation speed M set in the setting data 941 (step S9), and the process proceeds to step S11.

[0284] If the trial sewing mode is set, the sewing machine motor 16 is not driven, and the process proceeds to step S11.

[0285] In step S11 , the CPU 91 drives the upper left motor 45 , the upper right motor 46 , the first motor 25 , and the second motor 26 at a predetermined upper shaft angle and at the feed pitches U1 , U2 , D1 , and D2 set in the setting data 941 to feed the sewn material (step S11 ).

[0286] In the trial sewing mode, the sewing machine motor 16 is not driven, so the needle is not dropped, and the workpiece is fed empty for one stitch at the same cycle timing as the set rotation speed M.

[0287] Next, the CPU 91 determines whether a setting data conversion condition has occurred (step S13). For example, when an input operation for converting the setting data 941 is performed from the pedal 95 as described above, when a feeding operation of the number of stitches set in the setting data 941 is performed, or when the incision N of the sewn object C is detected by the imaging element 97 provided in the sewing machine 100, a process of converting from the current setting data 941 to the next setting data 941 is executed.

[0288] When switching to the next setting data 941 , the abutment plate 51 of the positioning ruler 50 is moved to the new edge width according to the setting, and when the mode is not the trial sewing mode, the sewing machine motor 16 is driven at the new rotation speed M (step S17 ).

[0289] Then, the process returns to step S11, and the upper left motor 45, the upper right motor 46, the first motor 25, and the second motor 26 are driven at the new feed pitches U1, U2, D1, and D2 to feed the sewn article.

[0290] On the other hand, in step S13, when the CPU 91 does not determine that the data conversion condition is set, it determines whether the sewing end instruction is input from the pedal 95 (step S15). If the end instruction is not input, the processing returns to step S11 and the sewing action is continued.

[0291] On the other hand, when a sewing end instruction is input from the pedal 95, the CPU 91 stops the driving of the sewing machine motor 16 and executes thread cutting as set in the setting data 941. Then, the presser foot 71 is raised to end the sewing operation.

[0292] In the trial sewing mode, even if thread cutting is set in the setting data 941, the thread cutting operation does not need to be performed.

[0293] [Control of feeding out sewn material (1)]

[0294] When the sewing machine 100 continuously sews a plurality of sewn objects C, a stacking device T for storing a plurality of sewn objects C is sometimes provided in parallel. In this case, in a general sewing machine, after the sewing is completed, a conveying device for conveying the sewn objects C to the stacking device is additionally required, which results in an increase in the size of the system constituting the entire device and an increase in cost.

[0295] Therefore, the control device 90 of the sewing machine 100 can use the belts 21~24, 41, 42 as conveyor belts to perform the first delivery control, that is: control the first motor 25, the second motor 26, the upper left motor 45, and the upper right motor 46, and use the belts 21~24, 41, 42 to perform the delivery action at the terminal end of the sewn object C.

[0296] Regarding the first delivery control described above, whether or not to execute the first delivery control can be set in the setting data 941 and the connection data 942 .

[0297] When the first delivery control is set, the CPU 91 of the control device 90 detects the terminal end of the sewn object during the sewing operation. The detection of the terminal end of the sewn object can be performed by using a sensor or an imaging device, or it can be detected by judging the arrival of the terminal end of the sewn object based on the sewing end action. The sewing end action can be judged by the execution of thread cutting, the input of the sewing end instruction from the pedal 95, etc. In addition, when the number of stitches to be sewn is set in the setting data, it can be judged based on the arrival of the number of stitches.

[0298] Furthermore, if the CPU 91 detects the end of the sewing object C during the sewing operation, Fig.18As shown, after the final needle drops and then after the thread cutting is performed, the first motor 25, the second motor 26, the upper left motor 45, and the upper right motor 46 are driven at a predetermined delivery speed that is higher than that during sewing, and the sewing object C is delivered toward the stacking device T set in the front.

[0299] In order to perform the feeding operation, it is preferable to control the rear end of the sewn material so as not to completely pass between the lower belts 21 to 24 and the upper belts 41 and 42 .

[0300] Thus, a conveying device for conveying the sewn objects C to the stacking device T is no longer required, and the system constituting the entire device can be downsized and the cost can be reduced.

[0301] In addition, the above-mentioned first feeding control is based on the sewing braking accompanied by needle drop, but is not limited to this, and can also be performed when the above-mentioned trial sewing mode is executed.

[0302] [Control of the delivery of sewn material (2)]

[0303] Based on the same topic as the aforementioned first delivery control, the control device 90 of the sewing machine 100 can perform a second delivery control using the belts 21 to 24, 41, 42 as conveyor belts, that is, controlling the first motor 25, the second motor 26, the upper left motor 45, and the upper right motor 46, and performing a delivery action at the terminal end of the sewn object C using the belts 21 to 24, 41, 42.

[0304] Regarding the second delivery control, whether or not to execute the second delivery control may be set in the setting data 941 and the connection data 942 .

[0305] When the second delivery control is set, the CPU 91 of the control device 90 detects the terminal end of the sewn article during the sewing operation. The detection of the terminal end of the sewn article is the same as in the case of the first delivery control.

[0306] like Fig.19 (A) and Fig.19 As shown in (B), there are cases where the side edge of the sewing object C1 bends to the left and to the right toward the terminal. When the side edge of the sewing object C1 bends to the left, when creating the setting data 941, the feed pitch of each belt 21 to 24, 41, 42 is set to be larger on the right side than on the left. Similarly, when the side edge of the sewing object C1 bends to the right, the feed pitch of each belt 21 to 24, 41, 42 in the setting data 941 is set to be larger on the left side than on the right.

[0307] Furthermore, if the CPU 91 detects the end of the sewing object C1 or C2 during the sewing operation, Fig. 20As shown, after the last needle drops and then after the thread cutting is performed, according to the set value of the left and right feed spacing of the last needle, while maintaining the left and right difference of the feed spacing, the first motor 25, the second motor 26, the upper left motor 45, and the upper right motor 46 are driven at a predetermined feeding speed that is higher than that during sewing, toward the stacking device T1 or T2 set on the left and right sides of the front, to perform the feeding action of the sewn object C1 or C2.

[0308] In this case, it is also preferable to control the end of the sewn material so as not to completely pass between the lower belts 21 to 24 and the upper belts 41 and 42 in order to perform the feeding operation.

[0309] Thus, the sewn article C1 whose side edge is bent to the left can be fed to the left stacking device T1, and the sewn article C2 whose side edge is bent to the right can be fed to the right stacking device T2.

[0310] That is, two types of sewn articles C1 and C2 having different shapes can be allocated to different stacking devices T1 and T2 based on the setting data 941 and stored.

[0311] In addition, the second feed control described above is also based on the premise of sewing braking accompanied by needle drop, but is not limited to this, and can also be performed when the above-mentioned trial sewing mode is executed.

[0312] [Dry feed conveying control]

[0313] In the case of a sewing machine in which both the up and down movement of the sewing needle and the feeding action of the sewn material are powered by the sewing machine motor, Fig.21 As shown, the sewn article C to be sewn at multiple separate locations needs to adjust the orientation and needle drop position of the sewn article after sewing at one location is completed, and then reset before sewing the next location.

[0314] Therefore, the control device 90 of the sewing machine 100 is capable of performing idle feeding conveying control on the sewn material C being sewn at multiple separated locations, that is, the sewn material is conveyed from the end end of one separated sewing location to the starting end of another sewing location via an idle feeding action without needle drop, and sewing is continued.

[0315] In addition, "separation" means that the sewn parts are separated from each other and the stitching lines are also disconnected.

[0316] In this case, setting data 941 for performing the idle feed conveying operation is added between setting data 941 corresponding to one of the separated sewing locations and setting data 941 corresponding to the other sewing location in the connection data 942 .

[0317] Regarding the setting data 941 for performing the empty feeding and conveying action, it is set that: the rotation speed M of the sewing machine motor 16 is 0, the pressing force W is a general pressure suitable for cloth feeding, and for the edge width Co, instead of the set value, an instruction is set to put the positioning ruler 50 in the non-use position.

[0318] The setting of the feed pitch of each belt 21 to 24, 41, 42 is constituted by a combination of three operations: a rotation operation, a conveying operation, and a rotation operation.

[0319] The initial turning operation is set to set one of the left and right feed amounts to positive and the other to negative, and to turn directly in the direction from the end position of one sewing location toward the start position of the other sewing location.

[0320] Regarding the conveying action, the feed pitch and the number of stitches are set so that it is possible to reach the start position of another sewing position by straight travel from the end position of one sewing position through idle feed.

[0321] The final swing operation is set to directly generate a swing by making one of the left and right feed amounts positive and the other negative so that the straight conveying direction relative to the idle feed becomes the direction at the start of another sewing position.

[0322] In this way, the control device 90 of the sewing machine 100 performs empty feed conveying control, such as Fig. 22 As shown, the sewn article C can be conveyed from the terminal position of one sewing location separated from each other to the starting position of another sewing location by idle feeding, and sewing can be performed continuously without resetting the sewn article C.

[0323] Furthermore, regarding the setting of the feed pitch of each belt 21 to 24, 41, and 42 in the setting data 941 for performing the idle feed conveying operation, a case where the three combinations of the rotation operation, the conveying operation, and the rotation operation are set is exemplified, but the present invention is not limited to this.

[0324] For example, the feeding pitch of each of the tapes 21 to 24 , 41 , and 42 may be set so as to draw a curve smoothly connected from the end position of one sewing location to the start position of another sewing location.

[0325] [Technical Effects of Embodiments of the Invention]

[0326] In the sewing machine 100, the control device 90 can execute a trial sewing mode, in which the sewing machine motor 16 is stopped, and only the lower feed mechanism 20 and the upper feed mechanism 40 are used to feed the sewing object C. Therefore, the sewing machine 100 does not need to perform needle drop sewing, that is, it can achieve trial sewing. Therefore, it is not necessary to process the sewing thread after confirmation, that is, the sewing action can be confirmed and the workload can be reduced. In addition, there is no needle drop on the sewing object C used for trial sewing, so it is possible to suppress the waste of the sewing object C, and provide a highly economical sewing machine.

[0327] In addition, the lower feed mechanism 20 and the upper feed mechanism 40 feed the sewn material C on the left and right sides of the needle drop position, and the operation input unit 96 can set the feed amount on the left and right sides of the needle drop position of the lower feed mechanism 20 and the upper feed mechanism 40 respectively for the setting data 941.

[0328] Thus, by the left and right differential feeding, good sewing and feeding of the sewn object C can be performed along the trajectory curved to the left and right.

[0329] In addition, the lower feed mechanism 20 of the feeding device feeds the sewn material on both sides of the front and rear of the needle drop position by changing the installation of the belt. The operation input unit 96 can set the feed amount on the front and rear sides of the needle drop position of the lower feed mechanism 20 respectively for the setting data 941.

[0330] This makes it possible to perform good sewing and feeding of the sewn article C by increasing or decreasing the tension of the thread forming the seam of the sewn article.

[0331] The lower feeding mechanism 20 and the upper feeding mechanism 40 feed the sewn article C at the upper and lower sides, respectively. The operation input unit 96 can set the feed amount for the lower and upper sides of the sewn article C for the setting data 941 .

[0332] In addition, the lower feed mechanism 20 and the upper feed mechanism 40 use a conveyor belt to feed the sewn object C. Therefore, unlike the feed teeth, scratches, indentations, etc. will not be generated due to the material of the sewn object. The feed teeth can prevent the presser foot from bouncing up during high-speed feeding action, thereby reducing the accuracy of the feed amount, and can also suppress vibration and noise.

[0333] In addition, the sewing machine 100 has a data storage device 94 that can store a plurality of setting data 941 that determine settings for sewing. The control device 90 performs a feeding operation of the sewn object C using the lower feed mechanism 20 and the upper feed mechanism 40 based on the selected setting data 941.

[0334] On the other hand, the sewing machine 100 can easily and repeatedly perform trial sewing using the trial sewing mode, so the setting data 941 can be corrected quickly and easily, and more appropriate setting data 941 can be obtained, thereby performing better sewing.

[0335] In addition, the control device 90 is capable of connecting multiple selected setting data 941, and using the lower feed mechanism 20 and the upper feed mechanism 40 in sequence to feed the sewn object. Therefore, sewing with different setting contents of the setting data 941 can be performed continuously, and the sewn object C can be sewn more densely and appropriately.

[0336] Since the sewing with different setting contents of the setting data 941 can be continuously performed, the whole sewing operation can be performed more quickly. In addition, for complicated sewing, it can also be performed with higher quality.

[0337] In addition, when the control device 90 connects the selected multiple setting data 941 and sequentially performs the feeding operation of the sewn material C using the lower feeding mechanism 20 and the upper feeding mechanism 40, it switches from one setting data to the next setting data according to the input operation of the operator.

[0338] Therefore, the switching of each setting data 941 is not uniform, and sewing can be performed according to the judgment of the operator, which can improve versatility.

[0339] In addition, when the control device 90 connects the selected multiple setting data 941 and sequentially uses the lower feeding mechanism 20 and the upper feeding mechanism 40 to feed the sewn material C, it automatically switches from one setting data to the next setting data according to the set number of stitches, etc.

[0340] Therefore, when the range of sewing with each setting data 941 is known in advance, the operator does not need to make a judgment, and appropriate sewing can be performed. Thus, when a plurality of sewn objects C are uniformly sewn, the operation can be performed efficiently. In addition, the load on the operator can be reduced.

[0341] In addition, when the control device 90 connects the selected multiple setting data 941 and uses the lower feed mechanism 20 and the upper feed mechanism 40 in sequence to feed the sewn material C, if the incision N serving as an indicator mark is detected by the camera element 97 and the sensor, it switches from one setting data to the next.

[0342] Therefore, even when the range of sewing with each setting data 941 is not known in advance, the operator does not need to make a judgment, and appropriate sewing can be performed.

[0343] Furthermore, even when the shapes of the plurality of sewn articles C vary or elongation occurs during sewing, causing the feed rate to change, it is possible to appropriately handle the situation and efficiently perform the operation. In addition, the load on the operator can be reduced.

[0344] Furthermore, when the control device 90 acquires the outer shape data that determines the outer shape of the sewn article C, it can allocate the setting data 941 to each of the plurality of sections Se1 to Se3 of the outer shape represented by the outer shape data.

[0345] Therefore, when the outer shape data is acquired from the cutting pattern data or the like, appropriate setting data 941 can be set for the sewn object, and appropriate connection data 942 can be set, so that better sewing can be performed.

[0346] The setting data 941 input from the operation input unit 96 includes the feed amounts of the lower feed mechanism 20 and the upper feed mechanism 40 , the pressing force of the cloth presser mechanism 70 , the sewing speed, and the edge width.

[0347] Thereby, the workpiece C can be sewn appropriately.

[0348] In the sewing machine 100, the control device 90 controls the lower feeding mechanism 20 and the upper feeding mechanism 40 to perform a feeding operation at the terminal end of the workpiece C using the conveying belts 21 to 24, 41, and 42.

[0349] Therefore, if the stacking device T is provided in parallel with the sewing machine 100, a conveying device for conveying the sewn objects C to the stacking device T becomes unnecessary, and the system constituting the entire device can be miniaturized and the cost can be reduced.

[0350] In the sewing machine 100, the control device 90 controls the lower feeding mechanism 20 and the upper feeding mechanism 40 to feed the ends of the sewing objects C1 and C2 in different directions using the belts 21 to 24, 41, and 42 according to respective setting data 941.

[0351] Therefore, if the stacking devices T1 and T2 are provided in parallel with the sewing machine 100 , two types of sewn objects C1 and C2 having different shapes can be allocated to the different stacking devices T1 and T2 based on the respective setting data 941 and stored.

[0352] Thus, the sewing machine 100 does not require a conveying device for conveying the sewn objects C to the respective stacking devices T1 and T2 , nor does it require a device for allocating the sewn objects C1 and C2 based on the contents of the setting data 941 .

[0353] This makes it possible to achieve miniaturization and cost reduction of the system constituting the entire device.

[0354] [other]

[0355] The above describes the various embodiments of the present invention. However, the present invention is not limited to the above embodiments. For example, the constituent elements formed integrally by a single component in the embodiments may be replaced by constituent elements divided into a plurality of components and connected or fixed to each other. In addition, constituent elements formed by connecting a plurality of components may be replaced by constituent elements formed integrally by a single component. In addition, the details shown in the embodiments may be appropriately changed within the scope of the main purpose of the invention.

[0356] For example, in the control of the aforementioned trial sewing mode, it is illustrated that: when the drive of the sewing machine motor 16 is stopped, the lower feed mechanism 20 and the upper feed mechanism 40 are used to control the feeding action of the sewn material, but it is not limited to this. As long as the sewing needle 11 is kept in the non-sewing position during the execution of the trial sewing mode, it is not necessary to stop the sewing machine motor 16.

[0357] The state in which the sewing needle 11 is kept at the non-sewing position means a state in which the sewing needle 11 has not reached the sewing object on the needle plate 101 .

[0358] For example, the structure may be as follows, namely: a retraction mechanism is provided, which can lift the needle bar 12 upward to a height at which the front end of the sewing needle 11 does not reach the sewn object on the needle plate 101 even at the lower dead point; in the trial sewing mode, the retraction mechanism is controlled to lift the needle bar 12 while the sewing machine motor 16 is driven.

[0359] Alternatively, the structure may be as follows: a transmission mechanism capable of cutting off or reducing the transmission is installed in the middle of the transmission path from the sewing machine motor 16 to the needle bar, and in the trial sewing mode, the transmission mechanism is controlled to cut off or reduce the transmission when the needle bar 12 does not reach the position of the sewn object (for example, the upper stop position) while the sewing machine motor 16 is driven. In addition, the reduction of the transmission means that the sewing needle moves up and down slightly within the range where the sewing needle does not reach the sewn object.

[0360] In addition, in the case of a mechanism equipped with a transmission mechanism capable of cutting off or reducing the transmission from the sewing machine motor 16, the sewing machine motor 16 may be configured to drive both the needle bar and the feed mechanism.

[0361] In addition, in this case, a transmission mechanism capable of cutting off or increasing or decreasing the transmission may be installed between the sewing machine motor 16 and the feeding mechanism.

[0362] As a "transmission mechanism capable of cutting or reducing transmission" or "transmission mechanism capable of cutting or increasing or decreasing transmission", for example, the following structure can be cited, that is, a reciprocating motion is taken out from a rotating shaft rotated by a sewing machine motor 16 by an eccentric mechanism, and a feed regulating body for changing and adjusting the motion direction of the reciprocating motion is installed to cut off, increase or decrease the reciprocating motion to the downstream side. In the case of this structure, a structure in which the adjustment action of the feed regulating body for changing and adjusting the motion direction is performed by another motor, or a structure in which the action is input manually can be adopted.

[0363] In the case where the sewing machine is managed by the system of the whole factory, or can be connected to an external information processing terminal, the following structure can be adopted, that is, various settings of the sewing machine are performed through the system or the external information processing terminal, the sewing machine obtains data of various settings, and performs various actions according to the settings. In this case, the sewing machine only needs to have a control function to execute the settings, and may not have a function to input various settings.

[0364] In addition, the sewing machine may communicate with an external system or information processing terminal by wire or wirelessly, or may be configured to acquire data set by an external system or information processing terminal from a recording medium.

[0365] In addition, in the above-mentioned sewing machine 100, if Figure 4 As shown in the figure, the structure in which the needle hole 13 is provided on the needle hole component 30 that moves up and down relative to the needle plate 101 at the same cycle as the sewing needle 11 is illustrated, but it is not limited to this. Fig.23 As shown in the figure, the needle hole 13 is formed to penetrate directly into the needle plate 101, and the needle hole 13 is fixed to a member that does not move up and down.

Claims

1. A sewing machine, characterized in that: have: A needle up and down moving mechanism, which moves the sewing needle up and down; A feeding device for feeding the sewn material; A control device for controlling the movement of the needle up and down movement mechanism and the feeding device, The control device can execute a trial sewing mode in which the sewing needle is stopped at a non-sewing position and the feeding device is used to feed the sewn object.

2. The sewing machine according to claim 1, characterized in that: The needle up and down movement mechanism is driven by a sewing machine motor. The feeding device is driven by a driving source different from the sewing machine motor.

3. The sewing machine according to claim 2, characterized in that: A setting input device is provided, which sets the sewing. The feeding device feeds the sewn material on the left and right sides of the needle drop position. The setting input device can set the feed amount by providing a difference between the left side of the needle drop position and the right side of the needle drop position of the feed device.

4. The sewing machine according to claim 2, characterized in that: A setting input device is provided, which sets the sewing. The feeding device feeds the sewn material at both sides of the front and rear of the needle drop position. The setting input device can set the feed amount in such a manner as to provide a difference between the front side of the needle drop position and the rear side of the needle drop position of the feed device.

5. The sewing machine according to claim 2, characterized in that: A setting input device is provided, which sets the sewing. The feeding device feeds the sewn material on both upper and lower sides. The setting input device can set the feed amount so as to provide a difference between the lower side of the sewn object and the upper side of the sewn object.

6. The sewing machine according to claim 1 or 2, characterized in that: The feeding device feeds the sewn material by using a conveyor belt.

7. The sewing machine according to any one of claims 3 to 5, characterized in that: The feeding device feeds the sewn material by using a conveyor belt.

8. The sewing machine according to claim 7, characterized in that A storage unit is provided, which can store a plurality of setting data determining settings for sewing, The control device performs a feeding operation of the sewn article by the feeding device based on the selected setting data.

9. The sewing machine according to claim 8, characterized in that The control device links the selected plurality of setting data and sequentially uses the feeding device to perform the feeding operation of the sewn article.

10. The sewing machine according to claim 9, characterized in that The control device switches from one setting data to the next setting data according to the input operation of the operator when the selected plurality of setting data are linked and the feeding device sequentially performs the feeding operation of the sewn article.

11. The sewing machine according to claim 9, characterized in that The control device automatically switches from one setting data to the next setting data when the selected plurality of setting data are linked and the feeding device sequentially performs the feeding operation of the sewn article.

12. The sewing machine according to claim 9, characterized in that A sensor is provided, the sensor detecting the indication mark from the sewn article being fed, When the control device connects the selected plurality of setting data and sequentially performs the feeding operation of the sewn article by the feeding device, if the indicator mark is detected by the sensor, the control device switches from one setting data to the next setting data.

13. The sewing machine according to claim 9, characterized in that When the control device acquires the outer shape data that determines the outer shape of the sewn object, the control device allocates the setting data to each of a plurality of sections of the outer shape represented by the outer shape data.

14. The sewing machine according to claim 8, characterized in that The setting data input from the setting input device includes at least one of a feed amount of the feed device, a pressing force of a presser mechanism, a sewing speed, and a margin width.

15. A sewing machine, characterized in that: have: The needle up and down moving mechanism uses the sewing machine motor to move the sewing needle up and down; A feeding device that feeds sewn objects using a driving source different from the sewing machine motor; A control device for controlling the movement of the needle up and down movement mechanism and the feeding device, The feeding device uses a conveyor belt to feed the sewn material. The control device controls the feeding device so that the conveyor belt performs a feeding operation at the terminal end of the sewn article.

16. A sewing machine, characterized in that: have: The needle up and down moving mechanism uses the sewing machine motor to move the sewing needle up and down; A feeding device that uses a driving source different from the sewing machine motor to feed the sewn material; A control device for controlling the movement of the needle up and down movement mechanism and the feeding device, a storage unit capable of storing a plurality of setting data determining settings for sewing, The feeding device uses a conveyor belt to feed the sewn material, and feeds the sewn material on the left and right sides of the needle drop position. The control device controls the feeding device so that the rear end portion of the sewn article is fed out in different directions by the conveyor belt according to the setting data.

Images