Sewing machine

Abstract

The present invention addresses the problem of suppressing positional displacement of a liner. The sewing machine includes: a table on which an object to be sewn is placed; the sewing machine main body is used for sewing at a sewing position on the workbench; and a cloth pressing mechanism for pressing the sewing object at a preparation position on the workbench. The table includes: a liner placement hole formed at a preparation position; an interlining support plate disposed in the interlining configuration hole and supporting an interlining component to be sewed on the sewing object; and a lifting mechanism for moving the lining support plate in the vertical direction.

Description

Technical Field

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

[0002] Sometimes, a plurality of pieces of fabric are overlapped and aligned to be sewn by a sewing machine. Patent Document 1 discloses a sewing machine that sews a flap by overlapping and sewing a small piece of fabric as a flap on a main piece of fabric as a body.

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2005-110963 Summary of the invention

[0006] [Problems to be solved by the invention]

[0007] Patent Document 1 discloses that two pieces of fabric are overlapped and sewn, but sometimes three or more pieces of fabric are overlapped and sewn. For example, sometimes a flap is arranged on the upper side of the body fabric, and a lining part (lining cloth) of the flap is arranged on the lower side of the body fabric, and the three pieces are sewn together. In this case, in the process of overlapping and arranging the fabrics, the position of the lining part is sometimes shifted due to friction with the body. The lining part is also sometimes hidden under the body, and it is difficult to suppress the position shift of the lining part relative to the body.

[0008] An object of an embodiment of the present invention is to suppress positional deviation of a lining part.

[0009] [Technical means to solve the problem]

[0010] According to an embodiment of the present invention, there is provided a sewing machine, comprising: a worktable on which an object to be sewn is placed; a sewing machine body for sewing at a sewing position on the worktable; and a cloth pressing mechanism for pressing the object to be sewn at a preparation position on the worktable, wherein the worktable comprises: a lining arrangement hole formed at the preparation position; a lining support plate arranged at the lining arrangement hole and supporting lining parts to be sewn to the object to be sewn; and a lifting mechanism for moving the lining support plate in an up-and-down direction.

[0011] [Effects of the Invention]

[0012] According to the embodiment of the present invention, positional deviation of lining parts can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a perspective view showing an example of the sewing machine according to the first embodiment.

[0014] Figure 2 It is a perspective view showing the head of the sewing machine according to the first embodiment.

[0015] Figure 3 It is a perspective view showing the first cloth pressing mechanism.

[0016] Figure 4 This is a perspective view of the lining arrangement hole of the table as viewed from the upper surface side.

[0017] Figure 5 This is a perspective view of the lining arrangement hole of the table as viewed from the bottom surface side.

[0018] Figure 6 It is a schematic diagram showing a state where the lining support plate is arranged in the lowered position.

[0019] Figure 7 It is a schematic diagram showing a state where the lining support plate is arranged in the raised position.

[0020] Figure 8 This is a schematic diagram showing a state where a sewing object is pressed by a pressing plate.

[0021] Fig. 9 This is a schematic diagram showing the flow of sewing operations (pre-process).

[0022] Fig.10 This is a schematic diagram showing the flow of sewing operations (sewing process).

[0023] [Explanation of Symbols]

[0024] 1. Sewing machine

[0025] 2: Workbench

[0026] 3: Sewing machine needle

[0027] 4: Sewing objects

[0028] 4A: First Fabric

[0029] 4B: Second fabric

[0030] 4C: Lining parts

[0031] 10: Sewing machine body

[0032] 11: Sewing machine stand

[0033] 11A: Horizontal arm

[0034] 11B: Base

[0035] 11C: Vertical Arm

[0036] 11D: Head

[0037] 12: Needle bar

[0038] 14: Actuator

[0039] 21: Top plate

[0040] 22: Feet

[0041] 23: Lining configuration hole

[0042] 23A: Edge

[0043] 24: Lining support plate

[0044] 25: Lifting mechanism

[0045] 25A: Main body

[0046] 25B: Rod

[0047] 25C: Bracket

[0048] 26: Guide

[0049] 26A, 26B: L-shaped member

[0050] 26C: Positioning unit

[0051] 30: Operating device

[0052] 31: Operation panel

[0053] 32: Operation pedal

[0054] 40: Control device

[0055] 50: Cloth pressing mechanism

[0056] 50A: First cloth pressing mechanism

[0057] 50B: Second cloth pressing mechanism

[0058] 51: First pressing plate

[0059] 52: Second pressing plate

[0060] 52A: End

[0061] 52B, 52C: Pressing part

[0062] 53: Mobile mechanism

[0063] 54: θ-axis drive unit

[0064] 55: Z-axis drive unit

[0065] 56: X-axis drive unit

[0066] 61: Press plate

[0067] 62: Mobile mechanism

[0068] MK: Mark

[0069] PB: Handover position

[0070] PS: Sewing position

[0071] PW: Ready Position

[0072] Q1: Ascending position

[0073] Q2: descending position DETAILED DESCRIPTION

[0074] Hereinafter, the embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto. The structural elements of the embodiments described below can be combined as appropriate. In addition, some structural elements may not be used.

[0075] In the present embodiment, a local coordinate system (hereinafter referred to as "sewing machine coordinate system") is defined for the sewing machine 1. The sewing machine coordinate system is defined by an XYZ orthogonal coordinate system. In the present embodiment, the positional relationship of each part is described based on the sewing machine coordinate system. The direction parallel to the X-axis in the specified plane is set as the X-axis direction. The direction parallel to the Y-axis in the specified plane orthogonal to the X-axis is set as the Y-axis direction. The direction parallel to the Z-axis orthogonal to the specified plane is set as the Z-axis direction. In addition, in the present embodiment, the plane containing the X-axis and the Y-axis is called the XY plane. The plane containing the X-axis and the Z-axis is called the XZ plane. The plane containing the Y-axis and the Z-axis is called the YZ plane. The XY plane is parallel to the specified plane. The XY plane, the XZ plane, and the YZ plane are orthogonal. In addition, in the present embodiment, the XY plane is parallel to the horizontal plane. The Z-axis direction is the up and down direction. The +Z direction is the up direction, and the -Z direction is the down direction. In addition, the XY plane may also be inclined relative to the horizontal plane.

[0076] use Figure 1 and Figure 2 The sewing machine 1 will be described. Figure 1 It is a perspective view showing an example of the sewing machine 1 according to the present embodiment. Figure 2 1 is a perspective view showing the head of the sewing machine 1 of the present embodiment. In the present embodiment, the sewing machine 1 is an electronic cycle sewing machine. The sewing machine 1 includes: a workbench 2, a sewing machine body 10, and a cloth pressing mechanism 50. The sewing machine 1 includes: an operating device 30 operated by an operator; and a control device 40 for controlling the sewing machine 1.

[0077] The work table 2 is provided with a sewing object 4 (see Figure 2). The workbench 2 has: a top plate 21, which provides a working surface for sewing operations; and legs 22, which support the top plate 21. The top plate 21 is supported by the legs 22 to be approximately parallel to the XY plane. The working surface is the upper surface of the top plate 21. Hereinafter, the upper surface of the top plate 21 is sometimes referred to as the "upper surface of the workbench 2". On the upper surface of the workbench 2, there are set: a sewing position PS, which is an area for sewing operations using the sewing machine body 10; and a preparation position PW, which is a region for assembling the sewing object 4 before sewing (refer to Figure 2 ) is an area for placing multiple pieces of fabric.

[0078] The sewing machine body 10 is mounted on the upper surface of the table 2. The sewing machine body 10 is disposed at the sewing position PS to perform sewing. The sewing machine body 10 includes a sewing machine frame 11, a needle bar 12 supported by the sewing machine frame 11, and an actuator 14 that generates power to move the needle bar 12.

[0079] The sewing machine frame 11 includes: a horizontal arm 11A extending in the Y-axis direction; a base 11B arranged below the horizontal arm 11A; a vertical arm 11C connecting the end of the +Y side of the horizontal arm 11A to the base 11B; and a head 11D arranged on the -Y side of the horizontal arm 11A.

[0080] like Figure 2 As shown, the needle bar 12 holds the sewing machine needle 3. The needle bar 12 holds the sewing machine needle 3 in such a manner that the sewing machine needle 3 becomes parallel to the Z axis. The needle bar 12 is supported by the head 11D so as to be movable in the Z axis direction.

[0081] like Figure 1 As shown, the actuator 14 generates power to move the needle bar 12 in the Z-axis direction. The actuator 14 includes a pulse motor. The actuator 14 is disposed on the horizontal arm 11A.

[0082] Inside the horizontal arm 11A, there is a horizontal arm shaft extending in the Y-axis direction. The actuator 14 is connected to the end of the horizontal arm shaft on the +Y side. The end of the horizontal arm shaft on the -Y side is connected to the needle bar 12 via a power transmission mechanism arranged inside the head 11D. The horizontal arm shaft rotates by the operation of the actuator 14. The power generated by the actuator 14 is transmitted to the needle bar 12 via the horizontal arm shaft and the power transmission mechanism. As a result, the sewing machine needle 3 held by the needle bar 12 reciprocates in the Z-axis direction. A needle plate with a needle hole is provided below the head 11D of the workbench 2.

[0083] A timing belt extending in the Z-axis direction is arranged inside the vertical arm 11C. In addition, a base shaft extending in the Y-axis direction is arranged inside the base 11B. Pulleys are arranged on the horizontal arm shaft and the base shaft, respectively. The timing belt is mounted on the pulleys arranged on the horizontal arm shaft and the pulleys arranged on the base shaft. The horizontal arm shaft and the base shaft are connected via a power transmission mechanism including a timing belt.

[0084] A shuttle is arranged inside the base 11B (directly below the needle bar 12). The shuttle contains a bobbin placed in a bobbin case. The horizontal arm shaft and the base shaft rotate respectively by the operation of the actuator 14. The power generated by the actuator 14 is transmitted to the shuttle via the horizontal arm shaft, the timing belt, and the base shaft. As a result, the shuttle rotates synchronously with the reciprocating movement of the needle bar 12 in the Z-axis direction.

[0085] The cloth pressing mechanism 50 presses the sewing object 4 at the preparation position PW. The cloth pressing mechanism 50 performs a placement operation of a plurality of pieces of cloth constituting the sewing object 4 at the preparation position PW. The cloth pressing mechanism 50 conveys the sewing object 4 from the preparation position PW to the sewing position PS. In addition, the cloth pressing mechanism 50 moves the sewing object 4 for forming a sewing pattern at the sewing position PS.

[0086] The cloth pressing mechanism 50 includes: a pressing plate (51, 52, 61) for pressing the sewing object 4; and a moving mechanism for moving the pressing plate from the preparation position PW toward the sewing position PS. The cloth pressing mechanism 50 includes: a first cloth pressing mechanism 50A for pressing the sewing object 4 at the preparation position PW; and a second cloth pressing mechanism 50B for receiving the sewing object 4 from the first cloth pressing mechanism 50A and pressing the sewing object 4 when sewing at the sewing position PS.

[0087] Figure 3 1 is a perspective view showing the first cloth pressing mechanism 50A. The first cloth pressing mechanism 50A includes a first pressing plate 51, a second pressing plate 52, and a moving mechanism 53 for moving the pressing plates.

[0088] The first pressing plate 51 is held by the moving mechanism 53 in a state substantially parallel to the upper surface (XY plane) of the workbench 2. The first pressing plate 51 extends linearly in the Y-axis direction, and the end portion in the +Y direction is held by the moving mechanism 53. The first pressing plate 51 is movable in the X-axis direction and the Z-axis direction by the moving mechanism 53. The first pressing plate 51 is arranged at a pressing position for pressing the sewing object 4 to the upper surface of the workbench 2 by moving in the -Z direction, and is arranged at a retreat position away from the upper surface of the workbench 2 in the +Z direction by moving in the +Z direction.

[0089] The second pressing plate 52 is a plate-shaped member, and is held by the moving mechanism 53 at the end 52A. The second pressing plate 52 is held by the moving mechanism 53 so as to be rotatable about the end 52A in the θX direction. Therefore, the second pressing plate 52 is located on the upper surface of the workbench 2 between a pressing position substantially parallel to the upper surface of the workbench 2 and a retreat position (θX) in which the second pressing plate 52 is rotated to stand up from the upper surface of the workbench 2 in the +Z direction and is separated from the upper surface of the workbench 2. Figure 3 The second pressing plate 52 has a comb-shaped pressing portion 52B and a pressing portion 52C. The pressing portion 52B and the pressing portion 52C are connected to each other. The pressing portion 52B and the pressing portion 52C are arranged at intervals in the X direction so that when the second pressing plate 52 is located at the pressing position, the first pressing plate 51 is located between the pressing portion 52B and the pressing portion 52C.

[0090] The moving mechanism 53 holds the first pressing plate 51 and the second pressing plate 52. The moving mechanism 53 includes: a θ-axis driving unit 54, a Z-axis driving unit 55, and an X-axis driving unit 56. The θ-axis driving unit 54 supports the end 52A of the second pressing plate 52, and rotates the second pressing plate 52 in the θX direction. The Z-axis driving unit 55 supports the first pressing plate 51 and the θ-axis driving unit 54 (the second pressing plate 52), and moves them in the Z-axis direction. The X-axis driving unit 56 supports the Z-axis driving unit 55, and moves the Z-axis driving unit 55 in the X-axis direction. The X-axis driving unit 56 is provided on the top plate 21 of the workbench 2. The θ-axis driving unit 54 has a θ-axis actuator, and the θ-axis actuator generates a driving force to rotate the second pressing plate 52 in the θX direction. The Z-axis driving unit 55 has a Z-axis actuator, and the Z-axis actuator generates a driving force to move the first pressing plate 51 and the θ-axis driving unit 54 in the Z-axis direction. The X-axis driving section 56 has an X-axis actuator that generates a driving force for moving the Z-axis driving section 55 in the X-axis direction.

[0091] Thus, the first cloth pressing mechanism 50A can press the sewing object 4 to the upper surface of the table 2 through the first pressing plate 51 and the second pressing plate 52, so that it moves from the preparation position PW to the sewing position PS (see FIG. Figure 1 ) The first cloth pressing mechanism 50A can move the first pressing plate 51 and the second pressing plate 52 from the preparation position PW to the handover position PB located between the preparation position PW and the sewing position PS. The handover position PB is an overlapping position of the movable range of the first cloth pressing mechanism 50A and the movable range of the second cloth pressing mechanism 50B. At the handover position PB, the sewing object 4 is handed over from the first cloth pressing mechanism 50A to the second cloth pressing mechanism 50B. The first cloth pressing mechanism 50A can also be moved to the sewing position PS.

[0092] like Figure 2As shown in FIG. 1 , the second cloth pressing mechanism 50B is disposed at the sewing position PS. The second cloth pressing mechanism 50B may be provided in the sewing machine body 10 .

[0093] The second cloth pressing mechanism 50B includes: a pressing plate 61; and a moving mechanism 62 that holds the pressing plate 61. The pressing plate 61 is formed in a frame shape in such a way that the sewing part of the sewing object 4 is exposed and the surrounding of the sewing part is pressed. The pressing plate 61 is held by the moving mechanism 62 in a state that is substantially parallel to the upper surface (XY plane) of the workbench 2. The pressing plate 61 is arranged in a pressing position for pressing the sewing object 4 to the upper surface of the workbench 2 by moving in the -Z direction, and is arranged in a retreat position away from the upper surface of the workbench 2 in the +Z direction by moving in the +Z direction. The moving mechanism 62 moves the pressing plate 61 in the X-axis direction, the Y-axis direction, and the Z-axis direction. The moving mechanism 62 includes an X-axis actuator that generates a driving force to move the pressing plate 61 in the X-axis direction, a Y-axis actuator that generates a driving force to move the pressing plate 61 in the Y-axis direction, and a Z-axis actuator that generates a driving force to move the pressing plate 61 in the Z-axis direction.

[0094] The second cloth pressing mechanism 50B can move the pressing plate 61 between the handover position PB and the sewing position PS. The second cloth pressing mechanism 50B receives the sewing object 4 from the first cloth pressing mechanism 50A at the handover position PB. The second cloth pressing mechanism 50B can freely move the pressing plate 61 along the upper surface of the workbench 2 in the X-axis direction and the Y-axis direction within a predetermined moving range including the handover position PB and the sewing position PS. Thus, the second cloth pressing mechanism 50B can move the sewing object 4 along the upper surface of the workbench 2 while pressing the sewing object 4 with the pressing plate 61.

[0095] like Figure 1 As shown in FIG. 1 , the operating device 30 receives an operation input from an operator. When the operating device 30 is operated, the sewing machine 1 is operated. In the present embodiment, the operating device 30 includes an operation panel 31 and an operation pedal 32 .

[0096] The operation panel 31 has: a display device, including a flat panel display such as a liquid crystal display (LCD: Liquid Crystal Display) or an organic electroluminescent display (OELD: Organic Electroluminescence Display); and an input device, which generates input data by being operated by an operator. The input device of the operation panel 31 is capable of accepting operations related to sewing processing. In the present embodiment, the input device includes a touch sensor configured on a display screen of the display device. That is, in the present embodiment, the operation panel 31 includes a touch panel having the function of an input device. The operation panel 31 is mounted on the upper surface of the workbench 2. The operating pedal 32 is configured below the workbench 2. The operator operates the operating pedal 32 with his foot. The sewing machine 1 is operated by the operator operating at least one of the operation panel 31 and the operation pedal 32.

[0097] The control device 40 outputs a control signal for controlling the sewing machine 1. The control device 40 includes a computer system. The control device 40 has: a storage device including a non-volatile memory such as a read-only memory (ROM) or a storage and a volatile memory such as a random access memory (RAM); and a processor such as a central processing unit (CPU).

[0098] The control device 40 is connected to the actuator 14 that moves the sewing machine needle 3 in the Z-axis direction, the actuators of the first cloth pressing mechanism 50A (θ-axis actuator, Z-axis actuator, X-axis actuator), the actuators of the second cloth pressing mechanism 50B (X-axis actuator, Y-axis actuator, Z-axis actuator), and the operating device 30. In addition, the control device 40 is connected to a drive amount sensor that detects the drive amount of the actuators of the actuator 14, the first cloth pressing mechanism 50A, and the second cloth pressing mechanism 50B.

[0099] The control device 40 controls the actuator 14 based on the detection data of the drive amount sensor of the actuator 14. For example, the control device 40 determines the operation timing of the actuator 14 based on the detection data of the drive amount sensor.

[0100] The control device 40 performs feedback control on the pressing operation and the moving operation of each pressing plate based on the detection data of the drive amount sensors of each actuator of the first cloth pressing mechanism 50A and the second cloth pressing mechanism 50B.

[0101] [Structure of lining support]

[0102] like Figure 3As shown, in this embodiment, the workbench 2 includes: a lining material arrangement hole 23; a lining material support plate 24, which is arranged in the lining material arrangement hole 23; and a lifting mechanism 25 (refer to Figure 5 ) to move the lining support plate 24 in the up and down direction. Figure 4 This is a perspective view of the lining arrangement hole 23 of the table 2 as viewed from the upper surface side. Figure 5 This is a perspective view of the lining arrangement hole 23 of the table 2 as viewed from the lower surface side.

[0103] like Figure 4 As shown, the lining arrangement hole 23 is a concave portion formed at the preparation position PW of the workbench 2. The lining arrangement hole 23 is used to set the lining parts 4C (see Figure 6 ) hole. Figure 4 In the example, the lining arrangement hole 23 is a through hole that penetrates the workbench 2 (top plate 21) in the thickness direction. When the thickness of the top plate 21 is large, the lining arrangement hole 23 may be a non-through recessed portion that is recessed from the upper surface of the workbench 2 in the -Z direction. The lining arrangement hole 23 is formed in a shape and position corresponding to the shape and arrangement position of the pre-set lining part 4C. Figure 4 In the example of FIG. 1 , the lining arrangement hole 23 is formed in a rectangular shape extending in the Y-axis direction. The lining arrangement hole 23 has an opening shape that is larger than the lining component 4C in a plan view and can receive the entire lining component 4C.

[0104] The lining support plate 24 is a flat plate member arranged in the lining configuration hole 23. The lining support plate 24 supports the lining part 4C to be sewn to the sewing object 4. The lining support plate 24 is supported by the lifting mechanism 25 so that the upper surface of the lining support plate 24 is parallel to the upper surface of the workbench 2 (i.e., the XY plane). The lining support plate 24 is supported to be able to move in the Z-axis direction in the lining configuration hole 23. The lining support plate 24 has a shape that is substantially equal to the inner periphery of the lining configuration hole 23 when viewed from above. The so-called substantially equal refers to a small gap that allows the lining support plate 24 to be smaller than the inner periphery of the lining configuration hole 23 so as to allow the lining support plate 24 to move up and down smoothly inside the lining configuration hole 23.

[0105] like Figure 5 As shown in FIG. 1 , the lifting mechanism 25 is disposed on the lower surface side of the workbench 2 (top plate 21) and is fixed to the top plate 21 from the lower surface side by a bracket 25C. The lifting mechanism 25 is a direct-acting actuator. Figure 5In the example of the embodiment, the lifting mechanism 25 is an air cylinder. The lifting mechanism 25 includes a main body 25A having a cylinder body, and a rod 25B that moves forward and backward relative to the main body 25A, and is installed in a posture that the rod 25B faces the Z-axis direction. The top end of the rod 25B is fixed to the lower surface of the lining support plate 24. Thus, the lifting mechanism 25 supports the lining support plate 24 from below. The lifting mechanism 25 raises the lining support plate 24 in the +Z direction by advancing the rod 25B in the +Z direction, and lowers the lining support plate 24 in the -Z direction by retreating the rod 25B in the -Z direction. The lifting mechanism 25 is connected to a pressure source such as a compressor via an air path, and the solenoid valve provided on the air path is controlled by the control device 40, thereby operating according to the control of the control device 40. The lifting mechanism 25 can also be implemented by an electromagnetic direct-acting actuator such as a solenoid. The lifting mechanism 25 can also be implemented by a direct-acting mechanism formed by combining a cam mechanism or a screw feed mechanism with an electric motor.

[0106] like Figure 4 As shown in FIG. 1 , the workbench 2 has a guide 26 provided along the periphery of the lining arrangement hole 23 on the lower surface of the workbench 2. Figure 5 In the figure, for convenience, the guide member 26 is omitted. The guide member 26 is fixed to the lower surface of the workbench 2 (top plate 21). Figure 4 In the example of FIG. 2 , the guide 26 includes an L-shaped member 26A and an L-shaped member 26B along two sides of the rectangular lining arrangement hole 23. The guide 26 is provided along the entire periphery of the lining arrangement hole 23 by the L-shaped member 26A and the L-shaped member 26B. The side surfaces of the L-shaped member 26A and the L-shaped member 26B along the periphery of the lining arrangement hole 23 extend in the Z-axis direction. Thus, the guide 26 guides the movement of the lining support plate 24 in the Z-axis direction. The lifting mechanism 25 moves the lining support plate 24 in the Z-axis direction along the guide 26.

[0107] In addition, the guide 26 functions as a positioning member for the lining part 4C. The guide 26 has a positioning portion 26C that contacts the outer periphery of the lining part 4C inside the lining arrangement hole 23. By making the lining part 4C contact the positioning portion 26C, the position and orientation of the lining part 4C in the X-axis direction can be positioned to a regular position. The positioning portion 26C is a side surface of the guide 26. In this embodiment, the positioning portion 26C is composed of the +X side side surface of the L-shaped member 26A. The positioning portion 26C is a surface extending linearly along the Y-axis direction, and the position and range of the positioning portion 26C when viewed from above are consistent with the side 23A on the -X side of the lining arrangement hole 23. That is, the positioning portion 26C aligns the lining part 4C at a position in contact with the side 23A on the -X side of the lining arrangement hole 23 and in a direction along the side 23A (i.e., the Y-axis direction).

[0108] The moving range of the lining support plate 24 by the lifting mechanism 25 will be described. The lifting mechanism 25 moves the lining support plate 24 to the raised position Q1 (see Figure 7 ) and the descending position Q2 (refer to Figure 6 ) Figure 6 It is a schematic diagram which shows the state which arrange|positioned the lining support plate 24 at the lowered position Q2. Figure 7 It is a schematic diagram which shows the state which arrange|positioned the lining support plate 24 at the raised position Q1.

[0109] like Figure 6 As shown in the figure, the lowered position Q2 is a position where the upper surface of the lining part 4C provided on the lining support plate 24 is lower than the upper surface of the table 2 (top plate 21). Therefore, when the lining support plate 24 is located at the lowered position Q2, the lining part 4C provided on the lining support plate 24 does not contact the cloth (first cloth 4A) on the top plate 21.

[0110] In addition, the thickness of the guide 26 in the Z-axis direction corresponds to the stroke amount of the lining support plate 24 in the Z-axis direction based on the lifting mechanism 25. That is, the thickness of the guide 26 is greater than the distance from the lower surface of the top plate 21 to the descending position Q2 of the lining support plate 24. Therefore, even when the lining support plate 24 is arranged in the descending position Q2, it is surrounded by the guide 26. The guide 26 prevents the lining part 4C from falling from the gap between the lower surface of the workbench 2 and the lining support plate 24. In addition, Figure 6 In the figure, for convenience of explanation, the upper surface of the lining support plate 24 is shown as being arranged below the top plate 21 in the lowered position Q2, but the upper surface of the lining support plate 24 may be located between the upper and lower surfaces of the top plate 21.

[0111] like Figure 7 As shown, the rising position Q1 is a position where the upper surface of the lining support plate 24 is at the same position as the upper surface of the workbench 2 or is higher than the upper surface of the workbench 2. Figure 7 In the example of , the rising position Q1 is a position where the upper surface of the lining support plate 24 and the upper surface of the workbench 2 (top plate 21) are at the same height. Therefore, when the lining support plate 24 is at the rising position Q1, the pressing plate can move the lining part 4C from the lining support plate 24 to the workbench 2 (top plate 21) without being caught on the lining arrangement hole 23. The upper surface of the lining support plate 24 can also be slightly above the upper surface of the workbench 2 (+Z direction). The reason is that: even in the above case, the lining part 4C can be moved from the lining support plate 24 to the workbench 2 without being caught on the edge of the lining arrangement hole 23.

[0112] Next, the positional relationship among the sewing object 4, the lining support plate 24, and the pressing plate will be described. Figure 8 It is a schematic diagram showing a state where the sewing object 4 is pressed by the pressing plates (the first pressing plate 51 and the second pressing plate 52).

[0113] like Figure 8 As shown, in this embodiment, the sewing object 4 is composed of a first cloth 4A, a second cloth 4B, and a lining component 4C, and these three cloth components are overlapped and sewn together by the sewing machine body 10.

[0114] The first cloth 4A is the largest cloth component, and is larger than the lining arrangement hole 23 in a plan view. The first cloth 4A is arranged so as to cover the lining arrangement hole 23 (and the lining component 4C). The second cloth 4B is a cloth component smaller than the first cloth 4A, and may be larger or smaller than the lining arrangement hole 23 in a plan view. The second cloth 4B is arranged on the first cloth 4A in a position overlapping with the lining arrangement hole 23 (i.e., the lining component 4C). The lining component 4C is a cloth component smaller than the first cloth 4A, and is smaller than the lining arrangement hole 23 in a plan view. The lining component 4C is supported by the lining support plate 24 on the inner side of the lining arrangement hole 23.

[0115] The sewing object 4 is, for example, the front body of a polo shirt. In this case, the first fabric 4A is the fabric of the front body, the second fabric 4B is the fabric part of the flap, and the lining part 4C is the lining (lining cloth) corresponding to the flap. In this case, the flap (second fabric 4B) and the lining part 4C are straight strips (rectangular shapes) when viewed from above.

[0116] The pressing plate of the first cloth pressing mechanism 50A presses the first cloth 4A, the second cloth 4B, and the lining part 4C from above the lining arrangement hole 23. Specifically, the first pressing plate 51 presses the first cloth 4A at a position away from the lining arrangement hole 23. The first pressing plate 51 is arranged at a position away from the lining arrangement hole 23 in the +X direction, and presses only the first cloth 4A. The -X side surface of the first pressing plate 51 also functions as a positioning portion for the second cloth 4B. That is, by making the +X side end of the second cloth 4B contact the side end surface of the first pressing plate 51, the second cloth 4B can be arranged in a regular position.

[0117] The second pressing plate 52 presses the first cloth 4A, the second cloth 4B, and the lining parts 4C at a position overlapping with the lining arrangement hole 23. The second pressing plate 52 is arranged in a range including a position directly above the lining arrangement hole 23. Therefore, at the preparation position PW, the first cloth 4A, the second cloth 4B, and the lining parts 4C are pressed against the lining support plate 24 by the second pressing plate 52, and are clamped by the second pressing plate 52 and the lining support plate 24. The first cloth pressing mechanism 50A moves the first pressing plate 51 and the second pressing plate 52 in the XY direction while maintaining the pressing state, thereby moving the sewing object 4 (a stack of three cloth parts) on the workbench 2.

[0118] [Sewing machine movement]

[0119] Next, the flow of the sewing operation of the sewing machine 1 according to the present embodiment will be described. The sewing operation of the sewing machine 1 is controlled by the control device 40 . Fig. 9 This is a schematic diagram showing the process of sewing (pre-process). Fig.10 This is a schematic diagram showing the flow of sewing operations (sewing process).

[0120] In the sewing operation, first, the sewing object 4 is placed on the table 2 at the preparation position PW of the table 2 (top plate 21) as a pre-sewing process. Fig. 9 As shown in FIG. 1 , a mark MK for positioning the sewing object 4 is marked on the upper surface of the workbench 2 (top plate 21) at the preparation position PW. A portion of the mark MK may be provided on the lining support plate 24. In the previous process, the control device 40 uses the lifting mechanism 25 to place the lining support plate 24 at the lowered position Q2 (refer to FIG. 1 ). Figure 6 ). The control device 40 arranges the first cloth pressing mechanism 50A at the preparation position PW, and arranges the first pressing plate 51 and the second pressing plate 52 at the retreat position.

[0121] Initially, the lining component 4C is placed on the lining support plate 24 at the lowered position Q2 (step S1). The operator places the lining component 4C on the lining support plate 24 in the lining arrangement hole 23. At this time, the lining component 4C is placed on the lining support plate 24 by the alignment with the mark MK and the positioning portion 26C of the guide 26 (see Figure 4 ) to position the lining part 4C.

[0122] Next, the first cloth 4A is placed at the preparation position PW on the workbench 2 (step S2). The operator places the first cloth 4A based on the mark MK on the workbench 2. The first cloth 4A covers the lining arrangement hole 23. Figure 6As shown in FIG. 1 , since the lining support plate 24 is located at the lowered position Q2, the lining component 4C is supported while being kept out of contact with the first cloth 4A on the table 2. Therefore, even if the operator adjusts the position of the first cloth 4A on the table 2, the lining component 4C can be prevented from being displaced as the first cloth 4A moves.

[0123] Next, the first cloth pressing mechanism 50A presses the first cloth 4A with the first pressing plate 51 (step S3). When the control device 40 receives the operation input with the operation device 30, the lining support plate 24 is arranged at the raised position Q1 (see FIG. 1 ) with the lifting mechanism 25. Figure 7 ), and the Z-axis driving unit 55 of the first cloth pressing mechanism 50A is used to lower the first pressing plate 51 from the upper retreat position toward the -Z direction. Figure 7 As shown in FIG. 1 , the first pressing plate 51 pushes the first cloth 4A toward the top plate 21. At this time, the second pressing plate 52 is kept in a state of being arranged in a retreat position away from the upper surface of the table 2 by the θ-axis driving unit 54. In addition, by arranging the lining support plate 24 in the raised position Q1, as shown in FIG. Figure 7 As shown, the lining component 4C is in contact with the lower surface of the first cloth 4A.

[0124] Next, the second cloth 4B is set at the preparation position PW on the workbench 2 (step S4). The operator sets the second cloth 4B at a predetermined position on the first cloth 4A with the first pressing plate 51 as the position reference. Even if the operator adjusts the position of the second cloth 4B on the first cloth 4A, the first cloth 4A pressed by the first pressing plate 51 will not be displaced. Since the first cloth 4A does not shift in position, the position of the lining part 4C on the lower side of the first cloth 4A can also be prevented from shifting in position. Through step S4, the first cloth 4A, the second cloth 4B and the lining part 4C arranged in an overlapping manner constitute the sewing object 4.

[0125] Next, the first cloth pressing mechanism 50A presses the sewing object 4 using the second pressing plate 52 (step S5). When the control device 40 receives the operation input using the operating device 30, the θ-axis driving unit 54 of the first cloth pressing mechanism 50A rotates the second pressing plate 52 from the upper retreat position toward the upper surface of the workbench 2. As a result, Figure 8 As shown, the second pressing plate 52 pushes the sewing object 4 (the first cloth 4A, the second cloth 4B and the lining part 4C) toward the lining support plate 24 and in the -Z direction to determine the relative position of each cloth. Thus, the previous process at the preparation position PW is completed.

[0126] Next, the sewing process based on the sewing machine body 10 is performed. Fig.10As shown, the control device 40 uses the first cloth pressing mechanism 50A to move the sewing object 4 from the preparation position PW, and transfers the sewing object 4 from the first cloth pressing mechanism 50A to the second cloth pressing mechanism 50B (step S6). The control device 40 uses the X-axis driving unit 56 to move the pressing plate from the preparation position PW to the handover position PB in the -X direction while keeping the sewing object 4 pressed by the pressing plate (the first pressing plate 51 and the second pressing plate 52). At this time, the control device 40 uses the moving mechanism 62 to configure the pressing plate 61 of the second cloth pressing mechanism 50B at the handover position PB in a retreat position away from the upper surface of the workbench 2. Therefore, the pressing plate (the first pressing plate 51 and the second pressing plate 52) of the first cloth pressing mechanism 50A moves along the upper surface of the workbench 2 to a position directly below the pressing plate 61 of the second cloth pressing mechanism 50B.

[0127] The control device 40 uses the Z-axis driving unit 55 of the first cloth pressing mechanism 50A to raise the pressing plates (the first pressing plate 51 and the second pressing plate 52) to a retreat position away from the upper surface of the workbench 2. As a result, the cloth pressing based on the first cloth pressing mechanism 50A is released. Then, the control device 40 uses the X-axis driving unit 56 to move the pressing plate from the handover position PB to the preparation position PW in the +X direction. Thereafter, the control device 40 uses the moving mechanism 62 to lower the pressing plate 61 of the second cloth pressing mechanism 50B from the retreat position toward the pressing position. As a result, the second cloth pressing mechanism 50B presses the sewing object 4 through the pressing plate 61 (performs cloth pressing). As a result, the handover of the sewing object 4 to the second cloth pressing mechanism 50B is completed.

[0128] Next, the control device 40 moves the sewing object 4 from the handover position PB to the sewing position PS by the second cloth pressing mechanism 50B, and then performs sewing of the sewing object 4 by the sewing machine body 10 (step S7). The control device 40 drives the sewing machine body 10 (needle bar 12 and shuttle) by the actuator 14, and moves the pressing plate 61 of the second cloth pressing mechanism 50B in a sewing pattern based on the sewing data. As a result, the first cloth 4A, the second cloth 4B and the lining parts 4C constituting the sewing object 4 are sewn together.

[0129] After the sewing of the sewing machine body 10 is completed, the control device 40 uses the moving mechanism 62 to raise the pressing plate 61 of the second cloth pressing mechanism 50B in the +Z direction to release the cloth pressing. Thus, the operator takes out the sewn object 4 from the workbench 2. Through the above steps, a sewing operation is completed.

[0130] At the start time of step S7, the control device 40 returns the first cloth pressing mechanism 50A to which the sewing object 4 has been delivered to the standby position PW, and uses the lifting mechanism 25 to place the lining support plate 24 at the lowered position Q2 (see Figure 6 ). The operator can start the preparation (pre-process) of the second sewing object 4 while sewing the first sewing object 4 using the sewing machine body 10. Therefore, after the sewing of the first sewing object 4 is completed, the sewing of the next second sewing object 4 can be started in a short time.

[0131] [Effect]

[0132] As described above, in this embodiment, the table 2 includes: the lining arrangement hole 23 formed at the preparation position PW; the lining support plate 24 arranged in the lining arrangement hole 23 and supporting the lining part 4C to be sewn to the sewing object 4; and the lifting mechanism 25 to move the lining support plate 24 in the up-down direction. Thus, the lining part 4C can be arranged in the lining arrangement hole 23, and the cloth other than the lining part 4C can be placed in the state where the lining support plate 24 is lowered. As a result, when placing each cloth, the lining part 4C can be prevented from being displaced due to contact with other cloth (first cloth 4A) arranged on the upper side.

[0133] In addition, in the present embodiment, the pressing plate presses the first cloth 4A arranged so as to cover the lining arrangement hole 23, the second cloth 4B arranged overlapping on the first cloth 4A, and the lining parts 4C supported by the lining support plate 24 from above the lining arrangement hole 23. Thus, even when three or more cloth parts are overlapped and sewn, the lining parts 4C can be effectively prevented from being displaced due to contact with the first cloth 4A. After the cloth is placed, the overlapping cloths can be moved together by moving the pressing plate while the lining support plate 24 is raised. In addition, the cloth pressing mechanism 50 includes: a first cloth pressing mechanism 50A; and a second cloth pressing mechanism 50B, which receives the sewing object 4 from the first cloth pressing mechanism 50A and presses the sewing object 4 when sewing at the sewing position PS. Thus, while the sewing object 4 is being sewn by the sewing machine body 10 and the second cloth pressing mechanism 50B, cloth pressing of the next sewing object 4 can be started by the first cloth pressing mechanism 50A at the preparation position PW.

[0134] In addition, in the present embodiment, the cloth pressing mechanism 50 includes: a first pressing plate 51 for pressing the first cloth 4A at a position away from the lining arrangement hole 23; and a second pressing plate 52 for pressing the first cloth 4A, the second cloth 4B, and the lining component 4C at a position overlapping the lining arrangement hole 23. Thus, the first pressing plate 51 can suppress the deformation and positional deviation of the largest first cloth 4A, and the second pressing plate 52 can press the three cloth components together.

[0135] In addition, in the present embodiment, the ascending position Q1 is a position where the upper surface of the lining support plate 24 is at the same position as the upper surface of the table 2 or is higher than the upper surface of the table 2, and the descending position Q2 is a position where the upper surface of the lining component 4C provided on the lining support plate 24 is lower than the upper surface of the table 2. Thus, in the descending position Q2, the lining component 4C can be maintained in a state of not contacting other fabrics, and the positional deviation of the lining component 4C can be effectively suppressed. In the ascending position Q1, when the lining component 4C is moved, the lining component 4C can be prevented from being caught in the lining arrangement hole 23 and being displaced.

[0136] In addition, in the present embodiment, the lining arrangement hole 23 is a through hole that penetrates the workbench 2 in the thickness direction. Thus, the lifting mechanism 25 can be easily arranged on the lower surface side of the workbench 2. The workbench 2 has a guide 26 arranged along the periphery of the lining arrangement hole 23 on the lower surface of the workbench 2. Thus, the lining support plate 24 can be correctly moved up and down. Even in the case where the thickness of the top plate 21 of the workbench 2 is small, the guide 26 can be used to suppress the falling of the lining part 4C. In addition, the lining arrangement hole 23 has an opening shape that is larger than the lining part 4C when viewed from above, and the guide 26 has a positioning portion 26C that contacts the outer periphery of the lining part 4C inside the lining arrangement hole 23. Thus, the lining part 4C can be easily placed in the lining arrangement hole 23. In the above case, the lining part 4C can also be correctly placed in the regular position by the positioning portion 26C.

[0137] [Other embodiments]

[0138] In the embodiment, an example is shown in which the sewing object 4 is the front body of a polo shirt, etc., and the second cloth 4B and the lining parts 4C as the front are respectively arranged on the two sides of the first cloth 4A as the front body, but the sewing object is not particularly limited. The structure of the embodiment can suppress the positional deviation of the lining parts in the operation of arranging and sewing relatively small lining parts on the lower surface side of relatively large cloth. The sewing object can be composed of two pieces of cloth (surface parts and lining parts) instead of three pieces of cloth, and can also be composed of four or more pieces of cloth. Sewing is not limited to sewing of the front, nor is it limited to sewing of clothes.

[0139] In addition, as described above, the lining arrangement hole 23 may be a non-through recessed portion instead of a through hole that penetrates the top plate 21. In this case, the lifting mechanism 25 may be arranged at the bottom of the recessed portion, or a rod insertion hole may be provided at the bottom of the recessed portion, and the rod 25B of the lifting mechanism 25 may be inserted into the rod insertion hole from the lower surface side of the top plate 21.

Claims

1. A sewing machine comprising: A workbench, on which sewing objects are placed; A sewing machine body, which performs sewing at the sewing position of the workbench; as well as a cloth pressing mechanism for pressing the sewing object at a preparation position of the workbench, The workbench comprises: a lining material configuration hole formed at the preparation position; a lining support plate, which is arranged in the lining arrangement hole and supports the lining parts to be sewn to the sewing object; and The lifting mechanism enables the lining support plate to move in the up and down directions.

2. The sewing machine according to claim 1, wherein The cloth pressing mechanism comprises: A pressing plate for pressing the sewing object; and a moving mechanism for moving the pressing plate from the preparation position toward the sewing position, The pressing plate presses the first fabric, the second fabric, and the lining part from above the lining arrangement hole. The first fabric is arranged to cover the lining arrangement hole. The second fabric is arranged on the first fabric at a position overlapping with the lining arrangement hole. The lining part is supported on the lining support plate.

3. The sewing machine according to claim 2, wherein The cloth pressing mechanism comprises: a first pressing plate, pressing the first fabric at a position away from the lining arrangement hole; as well as The second pressing plate presses the first cloth, the second cloth, and the lining component at a position overlapping the lining arrangement hole.

4. The sewing machine according to any one of claims 1 to 3, wherein The lifting mechanism moves the lining support plate between a raised position and a lowered position. The rising position is a position where the upper surface of the lining support plate is at the same position as the upper surface of the workbench or is higher than the upper surface of the workbench. The descending position is a position where the upper surface of the lining part provided on the lining support plate is lower than the upper surface of the workbench.

5. The sewing machine according to any one of claims 1 to 3, wherein The lining arrangement hole is a through hole that penetrates the workbench in the thickness direction. The workbench has a guide member provided along the periphery of the lining arrangement hole on the lower surface of the workbench, The lifting mechanism moves the lining support plate along the guide.

6. The sewing machine according to claim 5, wherein The lining arrangement hole has an opening shape larger than the lining part in a plan view, The guide has a positioning portion that contacts the outer periphery of the lining component in the lining arrangement hole.

7. The sewing machine according to any one of claims 1 to 3, wherein The cloth pressing mechanism comprises: a first cloth pressing mechanism, pressing the sewing object at the preparation position; as well as The second cloth pressing mechanism receives the sewing object from the first cloth pressing mechanism and presses the sewing object when sewing at the sewing position.

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