JP7039889B2 - Sewing equipment - Google Patents

Description

The present invention relates to a sewing device.

Conventionally, a sewing device that integrally moves a sewing machine head and a hook portion, which are separate bodies, in a horizontal direction is known. The sewing machine disclosed in Patent Document 1 includes a sewing machine head base, an elevating mechanism, a sewing machine head, and a hook portion. The sewing machine head base supports the elevating mechanism, and the elevating mechanism supports the sewing machine head so that it can move up and down. The hook is below the sewing machine head. The sewing machine moves the sewing machine head base and the hook portion in the horizontal direction integrally. The elevating mechanism moves the sewing machine head up and down between a lowering position, which is a vertical position during sewing operation, and an ascending position retracted upward from the lowering position.

Japanese Unexamined Patent Publication No. 2000-116975

However, in the above sewing machine, if the lifting device is stopped due to a power failure or the like while the sewing machine head is in the raised position, the sewing machine head may fall due to its own weight. For example, if the sewing machine head falls to a lowered position when the sewing machine object is taken out, it is difficult for the operator to safely take out the sewing machine object.

An object of the present invention is to move the upper support downward against the intention of the operator when the upper support supporting the needle bar that can move up and down is in a position retracted upward from the position during sewing operation. It is to provide a sewing device to regulate.

The sewing apparatus according to the present invention includes a lower base, a kettle mechanism including a needle plate provided on the lower base including a needle hole, and a kettle mechanism having a kettle below the needle hole and provided on the lower base. An upper base, a support that is vertically movablely connected to the upper base, and a needle bar that is vertically movablely supported by the support and has a sewing needle attached to the lower end above the needle hole. It is provided with a needle bar mechanism, a moving mechanism that integrally moves the kettle mechanism and the needle bar mechanism in the first direction parallel to the horizontal direction, and the needle bar mechanism is provided on the upper base and supported. The body is provided with a vertical drive unit that moves the body up and down between an operating position at which the sewing needle can pass through the needle hole and a retracting position retracted upward from the operating position, and the support is in the operating position. In the case, in a sewing device in which the moving mechanism moves the kettle mechanism and the needle bar mechanism while the kettle and the needle bar operate in synchronization with each other to perform sewing on the object to be sewn, the upper base is used. A locking mechanism is provided , and the locking mechanism is a lock that exits from the movable range of the support and enters the movable range of the support and faces the support in the retracted position from below. When the lock member is provided with a lock member that moves between the positions and a lock drive unit that moves the lock member between the lock release position and the lock position, and the lock member is in the lock release position, the lock member is provided. It does not restrict the support in the retracted position from moving toward the actuated position, but it regulates the support in the retracted position from moving toward the actuated position when it is in the locked position. It is characterized by doing.

According to the above configuration, when the support is in the operating position, the hook and the needle bar mechanism move integrally in the first direction as the upper base and the lower base move by the moving mechanism, and the sewing device moves. Perform the sewing operation. When the support is in the retracted position, the locking mechanism regulates the movement of the support towards the operating position. Therefore, when the upper support that supports the vertically movable needle bar is in a position retracted upward from the position during the sewing operation, the sewing device moves the upper support downward against the intention of the operator. Can be regulated.

The sewing device includes a control unit that drives and controls the vertical drive unit and the lock drive unit, and the control unit drives and controls the vertical drive unit to move the support from the operating position to the retracted position. An evacuation control unit that moves, and a first lock control unit that drives and controls the lock drive unit after the support is moved by the evacuation control unit to move the lock member from the unlocked position to the locked position. May be provided. After the retract control unit moves the support to the retracted position, the first lock control unit moves the lock member to the locked position. Since the lock member is moved by the control unit, the sewing device can move the lock member to the lock position at an appropriate time.

In the sewing device, the lock member is a shaft member that extends horizontally and moves between the unlocked position and the locked position along the axial direction, and the support is the support at the operating position. It includes a fitting hole that opens toward the lock member in the unlocked position, has a tubular portion extending in the axial direction, and the lock member has the fitting hole in the tubular portion when it is in the locked position. The control unit may include a second lock control unit that moves the lock member from the unlocked position to the locked position when the support is in the operating position. In this case, the sewing device can restrict the movement of the support to the retracted position even when an upward external force generated by a sudden factor acts on the support in the operating position.

In the sewing device, the needle bar mechanism includes an adjusting mechanism for adjusting the support position of the support with respect to the upper base in a second direction parallel to the horizontal direction and orthogonal to the first direction. The locking member may move between the locking position and the unlocking position along an axial direction parallel to the second direction. The adjusting mechanism adjusts the connection position of the support with respect to the upper base in the second direction, so that the sewing device can optimize the positional relationship between the needle bar and the needle hole in the second direction. The direction in which the adjusting mechanism adjusts the position of the needle bar and the direction in which the locking member moves coincide with each other. Therefore, even when the adjusting mechanism adjusts the position of the needle bar in the second direction, the sewing device does not need to adjust the movable range of the lock member. Therefore, the sewing device can simplify the position adjustment of the needle bar by the adjusting mechanism.

The sewing device may be provided on the upper base and may be provided with a lower damper that comes into contact with the support moving from the retracted position toward the operating position from below and decelerates the support. The sewing device can absorb the momentum of the support moving from the retracted position to the operating position with the lower damper.

The sewing device may be provided on the upper base and may include a positioning portion for positioning the support in contact with the lower damper at the operating position. The sewing device can stably stop the support moving downward from the retracted position at the operating position.

In the sewing device, the positioning portion is provided on the upper base and a contact portion that contacts and stops the support from below, fixes the contact portion, and adjusts the fixing position of the contact portion in the vertical direction. It may be provided with a possible fixing portion. Since the fixed position of the contact portion with respect to the fixed portion can be adjusted in the vertical direction, the positioning portion can adjust the operating position of the support in the vertical direction. Therefore, the sewing device can stabilize the sewing operation.

The sewing device is provided on the upper base, and is brought into contact with the support moving from the operating position toward the retracted position by the driving force of the vertical drive unit from above to decelerate the support. It may be equipped with a damper. The sewing device can absorb the momentum of the support moving from the operating position to the retracting position with the upper damper.

The sewing device includes a base portion that supports the kettle mechanism and the movement mechanism, a sewing machine motor fixed to the base portion, a first drive transmission unit that transmits the driving force of the sewing machine motor to the needle rod, and the above. It has a second drive transmission unit that transmits the driving force of the sewing machine motor to the kettle, and has a synchronization mechanism that synchronously drives the needle bar and the kettle with the driving force of the sewing machine motor, and the first drive transmission unit has. A spline shaft that extends in the first direction, is rotatably supported by the base portion around the axis, and is rotated by the driving force of the sewing machine motor, and the upper base that is rotatable with the first direction as the axial direction. A drive pulley, which is a pulley with teeth that is supported by a table, movably fits into the spline shaft in the first direction, and rotates integrally with the spline shaft, and can rotate with the first direction as the axial direction. An upper shaft that is supported by the support and connected to the needle rod, a driven pulley that is a pulley with teeth fixed to the upper shaft, and an annular base that bridges the drive pulley and the driven pulley. A toothed belt having a plurality of tooth portions arranged at equal intervals in the extending direction of the base portion and engaging with the drive pulley and the driven pulley, and a toothed belt provided on the upper base and the toothed belt. A first belt facing member that faces the first portion that meshes with the drive pulley with a gap, and a portion of the toothed belt that meshes with the driven pulley. A second belt facing member facing the second portion with a gap is provided, and the separation distance of the upper shaft from the spline shaft is in the retracted position rather than when the support is in the operating position. The time is shorter, and the facing distance between the first belt facing member and the first portion and the facing distance between the second belt facing member and the second portion are both maximum with respect to the base portion of the tooth portion. It may be less than or equal to the amount of protrusion of. When the support moves from the operating position to the retracted position, the first belt facing member and the second belt facing member can suppress the toothed belt from falling off from the drive pulley and the driven pulley. Therefore, the sewing device can suppress the phase shift between the drive pulley and the driven pulley.

The sewing device includes a base portion that supports the kettle mechanism and the movement mechanism, a sewing machine motor fixed to the base portion, a first drive transmission unit that transmits the driving force of the sewing machine motor to the needle rod, and the above. It has a second drive transmission unit that transmits the driving force of the sewing machine motor to the sewing machine, and has a synchronization mechanism that synchronously drives the needle bar and the sewing machine by the driving force of the sewing machine motor. The sewing machine motor is the first. A drive transmission unit and an output shaft connected to the second drive transmission unit are provided, and the control unit drives and controls the sewing machine motor to control the excitation state of the sewing machine motor at a predetermined rotation position of the output shaft. The retracting control unit includes an excitation control unit that is held in a specific excitation state, and the retracting control unit drives and controls the vertical drive unit after the drive control of the sewing machine motor by the excitation control unit to move the support from the operating position. You may move to the retracted position. When the support moves from the operating position to the retracted position, the sewing machine motor is in a specific excitation state, so that the output shaft is difficult to rotate. Therefore, when the support moves from the operating position to the retracting position, the sewing device can prevent the toothed belt from falling off from the drive pulley and the driven pulley.

The perspective view of the sewing apparatus 1. The perspective view of the needle bar mechanism 2 and the hook mechanism 4. An enlarged perspective view of the needle bar mechanism 2. The left side view of the synchronization mechanism 8. A perspective view of the upper base 37 and the vertical drive unit 310. FIG. 3 is a cross-sectional perspective view of the needle bar mechanism 2 in which the upper support 22 is in the operating position. The right side view of the needle bar mechanism 2 in which the upper support 22 is in the operating position. The perspective view of the fastening hole 413, the elongated hole 414, and the fastening member 415. Another perspective view of the fastening hole 413, the elongated hole 414, and the fastening member 415. A perspective view of the first wall portion 421 and the second wall portion 422. The electric block diagram of the sewing apparatus 1. Flow chart of sewing process. The right side view of the needle bar mechanism 2 in which the upper support 22 is in the retracted position. FIG. 3 is a cross-sectional perspective view of the needle bar mechanism 2 in which the upper support 22 is in the retracted position. The perspective view of the bolt 425 screwed into the facing hole 424. FIG. 3 is a perspective view of a bolt 425 in contact with the first wall portion 421.

The sewing apparatus 1 of the first embodiment of the present invention will be described. The following description uses left and right, front and back, and up and down indicated by arrows in the figure.

The schematic structure of the sewing apparatus 1 will be described. As shown in FIGS. 1 to 3, the sewing device 1 includes a base portion 10, a needle bar mechanism 2, a hook mechanism 4, an X moving mechanism 6, a Y moving mechanism 7, a synchronization mechanism 8, and a control unit 9 (see FIG. 11). Be prepared. The base portion 10 is a structure assembled in a substantially rectangular shape. The base portion 10 supports the needle bar mechanism 2, the hook mechanism 4, the X moving mechanism 6, the Y moving mechanism 7, and the synchronization mechanism 8. The base portion 10 includes a holding plate 90, a left support 98, a right support 97, a pair of lower rails 125, and a pair of upper rails 128. The holding plate 90 has a rectangular shape in a plan view. The left support 98 and the right support 97 are rectangular plate-shaped members viewed from the side, and are arranged in the left-right direction with the holding plate 90 in between. The pair of lower rails 125 extend in the left-right direction below the holding plate 90 and are arranged at intervals in the front-rear direction. The pair of upper rails 128 extend in the left-right direction above the holding plate 90 and are arranged at intervals in the vertical direction.

The needle bar mechanism 2 is supported by a pair of upper rails 128 so as to be movable left and right, and is located above the holding plate 90. The needle bar mechanism 2 includes an upper base 37, a needle bar 24, and the like. The upper base 37 has a substantially rectangular shape when viewed from the front. The upper base 37 is connected to the pair of upper rails 128 via a slider 34 so as to be movable left and right. The sliders 34 are provided in pairs on the upper and lower ends of the upper base 37, respectively, and the upper slider 34 engages with the upper rail 128 from below, and the lower slider 34 engages with the upper rail from the front. The upper base 37 is provided with an insertion hole 38 opened in the left-right direction substantially at the center in the up-down direction. The needle bar 24 can move in the vertical direction, which is the axial direction. A sewing needle 39 (see FIG. 3) is attached to the lower end of the needle bar 24. Details of the configuration of the needle bar mechanism 2 will be described later.

The hook mechanism 4 is located below the holding plate 90. The hook mechanism 4 includes a lower base 42, a hook 16, a needle plate 50, and a thread trimming mechanism. The lower base 42 has a substantially rectangular parallelepiped box shape. The lower base 42 is connected to the pair of lower rails 125 via a slider 54 so as to be movable left and right. The slider 54 is provided at the four lower corners of the lower base 42. The lower base 42 includes insertion holes 48 and 49. The insertion hole 48 is provided on the left side of the lower base 42, and the insertion hole 49 is provided on the right side of the lower base 42. The hook 16 is provided on a lower shaft 44, which will be described later, extending in the left-right direction inside the lower base 42. The hook 16 accommodates a bobbin wound with bobbin thread. The needle plate 50 is fixed to the upper part of the lower base 42. The needle plate 50 has a needle hole 53. The needle hole 53 is above the hook 16. The thread trimming mechanism is provided below the needle plate 50. The thread trimming mechanism includes a fixed blade, a movable blade, and a thread trimming pulse motor 57. The movable blade receives power from the thread trimming pulse motor 57 and moves with respect to the fixed blade. The thread trimming mechanism cuts the needle thread and the bobbin thread in cooperation with the movable blade and the fixed blade.

The X moving mechanism 6 integrally moves the needle bar mechanism 2 and the hook mechanism 4 in the left-right direction. The X-moving mechanism 6 includes belts 121 and 122, and an X-moving pulse motor 82 (see FIG. 11). Both the belts 121 and 122 have a substantially oval shape that is long in the left-right direction in a plan view. Both one end and the other end of the belt 121 are fixed to the back surface of the upper base 37. That is, the X moving mechanism 6 is connected to the upper base 37. Both one end and the other end of the belt 122 are fixed to the back surface of the lower base 42. The X-moving pulse motor 82 moves the belts 121 and 122 in the same direction by the same amount. Therefore, the X moving mechanism 6 moves the needle bar mechanism 2 along the pair of upper rails 128 and the hook mechanism 4 along the pair of lower rails 125.

The Y moving mechanism 7 moves the cloth, which is the object to be sewn, in the front-back direction relative to the needle bar mechanism 2 and the hook mechanism 4. The Y-moving mechanism 7 includes a cloth holder 95 and a Y-moving pulse motor 83 (see FIG. 11). The cloth holder 95 is supported by the holding plate 90. The Y-moving pulse motor 83 is connected to the cloth holding body 95 and moves the cloth holding body 95 in the front-rear direction. The cloth holder 95 has an upper frame 93, a lower frame 92, a left air cylinder 239, and a right air cylinder 219. The upper frame 93 and the lower frame 92 are rectangular frames in a plan view, and a cloth is sandwiched between them. The left air cylinder 239 and the right air cylinder 219 are connected to the upper frame 93. The upper frame 93 opens and closes up and down with respect to the lower frame 92 using the left air cylinder 239 and the right air cylinder 219 as drive sources.

The synchronization mechanism 8 will be described with reference to FIGS. 1, 2, and 4. The synchronization mechanism 8 includes a sewing machine motor 81, a first drive transmission unit 18, and a second drive transmission unit 19. The sewing machine motor 81 is fixed to the right surface of the left support 98. The output shaft 81A of the sewing machine motor 81 projects to the left from the left support 98. The sewing machine motor 81 fixes the connecting pulley 133 to the tip of the output shaft 81A.

The first drive transmission unit 18 transmits the drive force of the sewing machine motor 81 to the needle bar 24. The first drive transmission unit 18 includes an upper spline shaft 3 and the like. The upper spline shaft 3 extends in the left-right direction and is rotatably supported by the left support 98 and the right support 97. The upper spline shaft 3 has a groove extending in the left-right direction on the outer peripheral surface. The upper spline shaft 3 is inserted into the insertion hole 38 of the upper base 37. The upper spline shaft 3 is connected to the upper base 37 via a ball spline bearing supported by the insertion hole 38. Therefore, the upper base 37 is connected to the upper spline shaft 3 so as to be movable left and right. The ball spline bearing supported by the insertion hole 38 rotates integrally with the upper spline shaft 3. The upper spline shaft 3 fixes the upper pulley 134 to a portion protruding to the left from the left support 98. Details of the configuration of the first drive transmission unit 18 will be described later.

The second drive transmission unit 19 includes a lower spline shaft 5, a first pulley 45, an intermediate shaft 51, a second pulley 46, a timing belt 47, a lower shaft 44, and a swing mechanism. The lower spline shaft 5 extends in the left-right direction and is rotatably supported by the left support 98 and the right support 97. The lower spline shaft 5 has a groove extending in the left-right direction on the outer peripheral surface. The lower spline shaft 5 is inserted into the insertion holes 48 and 49 of the lower base 42. The lower spline shaft 5 is connected to the lower base 42 via a ball spline bearing supported by the insertion hole 49. Therefore, the lower base 42 is connected to the lower spline shaft 5 so as to be movable left and right. The ball spline bearing supported by the insertion hole 49 rotates integrally with the lower spline shaft 5. The lower spline shaft 5 fixes the lower pulley 135 to the portion of the lower spline shaft 5 projecting to the left from the left support 98. The lower pulley 135 is connected to the upper pulley 134 and the connecting pulley 133 via a belt 136. Therefore, the sewing machine motor 81 rotates the connecting pulley 133, and by rotating the upper pulley 134 and the lower pulley 135 via the belt 136, the upper spline shaft 3 and the lower spline shaft 5 rotate synchronously.

The first pulley 45 is a toothed pulley including a ball spline bearing supported by the insertion hole 49 inside. The intermediate shaft 51 extends in the left-right direction above the rear of the lower spline shaft 5 and is rotatably supported by the lower base 42. The intermediate shaft 51 projects to the right from the lower base 42. The second pulley 46 is fixed to the right end of the intermediate shaft 51. The timing belt 47 spans the first pulley 45 and the second pulley 46. The lower shaft 44 extends in the left-right direction inside the lower base 42 and can reciprocate. The lower shaft 44 fixes the hook 16 to the left end portion. The swing mechanism connects the intermediate shaft 51 and the lower shaft 44. The swing mechanism converts the one-way rotation of the intermediate shaft 51 into the reciprocating rotation of the lower shaft 44. Therefore, the hook 16 swings back and forth together with the lower shaft 44 in conjunction with the rotation of the lower spline shaft 5.

The needle bar mechanism 2 will be described with reference to FIGS. 3, 5, and 6. In addition to the upper base 37 and the needle bar 24, the needle bar mechanism 2 includes a pair of guide rails 61, four sliders 62, a pair of connecting bodies 63, an upper support body 22, an upper shaft 25, and a balance mechanism.

The pair of guide rails 61 are rails fixed to the front surface of the upper base 37 and extending in the vertical direction, and are arranged at intervals in the left-right direction. Two of the four sliders 62 are movably connected to the left guide rail 61, and the remaining two are vertically movably connected to the right guide rail 61. One of the pair of connecting bodies 63 is fixed to the two sliders 62 connected to the guide rail 61 on the left side, and the other of the pair of connecting bodies 63 is fixed to the two sliders 62 connected to the guide rail 61 on the right side. The connecting body 63 includes a support wall portion 63A having a rectangular side view. The support wall portion 63A projects forward from the front surface of the connecting body 63 and extends in the vertical direction.

The upper support 22 has a substantially box shape that is long in the left-right direction. The upper support 22 is fixed to the pair of support wall portions 63A by a fastening member 415 (see FIGS. 8 and 9) described later. Therefore, the upper support 22 is supported by the upper base 37 so as to be movable up and down. The upper support 22 includes a tubular portion 353 and a facing portion 355 (see FIG. 6). The tubular portion 353 has a cylindrical shape extending in the front-rear direction. The fitting hole 354, which is a cylindrical hole of the tubular portion 353, opens rearward. The facing portion 355 extends downward from the tubular portion 353. The balance mechanism is provided on the upper support 22. The balance 29 of the balance mechanism moves up and down in conjunction with the vertical movement of the needle bar 24.

The first drive transmission unit 18 of the synchronization mechanism 8 will be described with reference to FIGS. 3, 5, and 7. In addition to the upper spline shaft 3, the first drive transmission unit 18 includes an upper shaft 25, a drive pulley 71, a driven pulley 72, a toothed belt 73, a first belt facing member 75, and a second belt facing member 76.

The upper shaft 25 extends in the left-right direction and is rotatably supported by the upper support 22. The upper shaft 25 is connected to the needle bar 24 at the left end portion via the crank portion 17 (see FIG. 9). The crank portion 17 converts the rotation of the upper shaft 25 into the vertical movement of the needle bar 24. The sewing needle 39 (see FIG. 3) attached to the lower end of the needle rod 24 can pass through the needle hole 53 of the needle plate 50 as the needle rod 24 moves up and down. The holding plate 90 (see FIG. 1) has an elongated hole that penetrates in the vertical direction and extends in the horizontal direction at a position corresponding to the needle hole 53. The sewing needle 39 passes through the elongated hole and the needle hole 53. The upper shaft 25 is connected to the balance mechanism. The balance mechanism has a balance 29. The balance 29 moves up and down by the rotation of the upper shaft 25.

The drive pulley 71 is a toothed pulley including a ball spline bearing supported by the insertion hole 38 inside. The drive pulley 71 rotates integrally with the upper spline shaft 3. The drive pulley 71 has teeth on the outer peripheral surface. The driven pulley 72 is a pulley with teeth fixed to the right end of the upper shaft 25. The driven pulley 72 has teeth on the outer peripheral surface. The toothed belt 73 includes a base portion 73A and a plurality of tooth portions 73B. The base portion 73A has an endless shape having a substantially annular shape in the side view, and is bridged over the drive pulley 71 and the driven pulley 72. The plurality of tooth portions 73B are provided over the inner surface of the base portion 73A. The plurality of tooth portions 73B mesh with the tooth portions of the drive pulley 71 and the tooth portions of the driven pulley 72. The maximum protrusion amount of the tooth portion 73B from the base portion 73A (hereinafter referred to as the maximum protrusion amount of the tooth portion 73B) corresponds to the dimension L in FIG. 7. Hereinafter, the portion of the toothed belt 73 that meshes with the drive pulley 71 is referred to as a first portion 73C, and the portion that meshes with the driven pulley 72 is referred to as a second portion 73D.

The first belt facing members 75 are provided on the upper base 37 in pairs of upper and lower parts, and are located on the outer side (opposite side of the tooth portion 73B) with respect to the base portion 73A, respectively. The first belt facing member 75 faces the first portion 73C with a gap. The second belt facing member 76 is provided on the upper support 22 and is located on the outer side (opposite side of the tooth portion 73B) with respect to the base portion 73A. The second belt facing member 76 faces the second portion 73D with a gap. The facing distance between the first belt facing member 75 and the first portion 73C and the facing distance between the second belt facing member 76 and the second portion 73D are both equal to or less than the maximum protrusion amount of the tooth portion 73B. The first belt facing member 75 can move up and down with respect to the upper base 37, and the facing distance with the first portion 73C can be adjusted. The second belt facing member 76 can move up and down with respect to the upper support 22, and the facing distance with the second portion 73D can be adjusted.

The vertical drive mechanism 300 will be described with reference to FIG. The vertical drive mechanism 300 includes a vertical drive unit 310, a positioning unit 320, an upper damper 330, and a lower damper 340. The vertical drive unit 310 is a mechanism for moving the upper support 22 (see FIG. 6) up and down. The vertical drive unit 310 is fixed to the upper base 37 at a position in the left-right direction between the pair of support wall portions 63A. The vertical drive unit 310 is, for example, an air cylinder. The vertical drive unit 310 includes a drive shaft 311 extending in the vertical direction. By driving the vertical drive unit 310, the drive shaft 311 moves up and down. The drive shaft 311 fixes the connecting plate 312 to the upper end. The connecting plate 312 has a rectangular plate shape when viewed from the front. The connecting plate 312 is fixed to the upper support 22 (see FIG. 3). Therefore, by driving the vertical drive unit 310, the upper support 22 moves up and down between the operating position (see FIG. 6) and the retracted position (see FIG. 14). The operating position is the vertical position of the upper support 22 that allows the sewing needle 39 to pass through the needle hole 53 (see FIG. 2). The retracted position is a vertical position of the upper support 22 retracted upward from the operating position. When the upper support 22 is in the operating position, the sewing device 1 performs a sewing operation on the cloth. When the upper support 22 is in the retracted position, the needle bar 24 does not move up and down.

The positioning unit 320 positions the upper support 22 at the operating position. The positioning unit 320 includes an installation unit 321, a screw hole 322, and a nut 323. The installation portion 321 projects rearward from the connecting plate 312. The screw hole 322 penetrates the installation portion 321 in the vertical direction. The bolt 329 is, for example, a threaded rod, which is screwed into the screw hole 322. The upper end of the bolt 329 has an opening hole that opens upward. The nut 323 is screwed into the bolt 329. The nut 323 is pressed against the upper surface of the installation portion 321. Hereinafter, when the installation portion 321 and the screw hole 322 and the nut 323 are collectively referred to, they are referred to as a fixing portion 325. The fixing portion 325 fixes the bolt 329, and the fixing position of the bolt 329 can be adjusted in the vertical direction. Details of the adjustment method using the fixed portion 325 will be described later.

The upper damper 330 and the lower damper 340 are known hydraulic dampers as an example. The upper damper 330 includes an upper movable portion 331, and the lower damper 340 includes a lower movable portion 341. The upper movable portion 331 and the lower movable portion 341 are axial members whose axial direction is the vertical direction. The upper dampers 330 are provided in pairs on the left and right, and are fixed to the upper base 37. The upper movable portion 331 can come into contact with the contact portion 63B from above when the upper support 22 rises toward the retracted position. The contact portion 63B has a rectangular shape protruding rearward from the rear surface of the connecting body 63. The lower damper 340 is fixed to the installation portion 371 of the upper base 37. The installation portion 371 has a rectangular shape protruding forward from the upper base 37. The lower damper 340 projects upward from the installation portion 371. The lower damper 340 includes a lower movable portion 341. The lower movable portion 341 can come into contact with the upper support 22 descending toward the operating position from below.

The lock mechanism 350 will be described with reference to FIG. The lock mechanism 350 is provided on the upper base 37. The lock mechanism 350 regulates the ascent of the upper support 22 in the operating position and the lowering of the upper support 22 in the retracted position. The lock mechanism 350 includes a lock drive unit 352 and a lock member 351. The lock drive unit 352 is fixed to the upper base 37. The lock drive unit 352 is, for example, an air cylinder. The lock drive unit 352 includes a drive shaft 352A extending in the front-rear direction. When the lock drive unit 352 is driven, the drive shaft 352A moves back and forth. The lock member 351 is a cylindrical shaft member extending in the front-rear direction as an axial direction. The outer diameter of the lock member 351 is slightly smaller than the inner diameter of the fitting hole 354. The front end of the drive shaft 352A fits into a hole formed inside the lock member 351 and is fixed to the lock member 351. Therefore, the lock member 351 moves in the front-rear direction between the unlocked position and the locked position as the lock driving unit 352 is driven. In FIG. 6, the lock member 351 in the unlocked position is shown by a solid line, and the lock member 351 in the locked position is shown by a two-dot chain line. The unlock position is the position in the front-rear direction of the lock member 351 that exits rearward from the movable range of the upper support 22. The lock position is a position in the front-rear direction of the lock member 351 that enters the movable range of the upper support 22. The lock position is a position in front of the unlock position. When the upper support 22 is in the operating position, the lock member 351 that has moved from the unlocked position to the locked position fits into the fitting hole 354. In this case, the locking mechanism 350 restricts the upward movement of the upper support 22. When the upper support 22 is in the retracted position, the lock member 351 that has moved from the unlocked position to the locked position faces the lower end of the facing portion 355 from below (see FIG. 14). In this case, the lock mechanism 350 restricts the lowering of the upper support 22 in the retracted position.

The adjustment mechanism 400 will be described with reference to FIGS. 8 to 10. The adjusting mechanism 400 is a mechanism that adjusts the position where the upper base 37 supports the upper support 22 in the front-rear direction. The operator uses the bolt 425 (see FIGS. 15 and 16) when adjusting the support position of the upper support 22 with respect to the upper base 37 in the front-rear direction. Hereinafter, in the description of the configuration of the adjusting mechanism 400, it is assumed that the upper support 22 is in the operating position (see FIG. 5).

As shown in FIGS. 8 and 9, the adjusting mechanism 400 includes a fastening hole 413, an elongated hole 414, and a fastening member 415. Four fastening holes 413, elongated holes 414, and fastening members 415 of this example are provided. Two fastening holes 413 are provided in each of the right wall portion and the left wall portion of the upper support 22. The fastening hole 413 opens outward in the left-right direction. Two elongated holes 414 are provided in each of the two support wall portions 63A. Each elongated hole 414 faces each fastening hole 413. The fastening member 415 is inserted into the elongated hole 414 and fastened to the fastening hole 413 facing the elongated hole 414. Therefore, the upper support 22 is fixed to the pair of support wall portions 63A by the fastening member 415.

As shown in FIG. 10, the adjusting mechanism 400 includes a first wall portion 421 and a second wall portion 422. The first wall portion 421 is a wall portion provided at the lower end portion of the upper support 22. The second wall portion 422 is a wall portion provided at the lower end portion of the upper base 37. The first wall portion 421 and the second wall portion 422 face each other with a space in the front-rear direction. The first wall portion 421 includes a facing hole 424. The facing hole 424 is a screw hole that opens toward the rear. The second wall portion 422 includes a through hole 428 and a screw hole 423. The through hole 428 and the screw hole 423 penetrate the second wall portion 422 in the front-rear direction. The screw hole 423 is substantially coaxial with the facing hole 424. The screw hole 423 is to the left of the through hole 428. The inner diameter of the through hole 428 is larger than the outer diameter of the shaft portion 425A (see FIG. 15) of the bolt 425.

The bolt 425 shown in FIG. 15 includes a shaft portion 425A and a head portion 425B. The head portion 425B is provided at one end in the axial direction of the shaft portion 425A, and the outer diameter is larger than the outer diameter of the shaft portion 425A. The outer diameter of the head 425B is larger than the inner diameter of the through hole 428 (see FIG. 10). The operator can insert the shaft portion 425A of the bolt 425 from the rear into the through hole 428 and screw it into the facing hole 424, and the head portion 425B of the bolt 425 can be brought into contact with the second wall portion 422 from the rear. .. As shown in FIG. 16, the operator can screw the shaft portion 425A of the bolt 425 into the screw hole 423 from the rear and abut the first wall portion 421 from the rear.

The electrical configuration of the sewing device 1 will be described with reference to FIG. The control unit 9 of the sewing device 1 includes a microcomputer, an input interface 87 and an output interface 88 connected to the microcomputer via a data bus or the like, drive circuits 181 to 189, and the like. The microcomputer includes a CPU 11, a ROM 12, a RAM 13, and a storage device 14. The CPU 11 comprehensively controls the operation of the sewing device 1. The ROM 12 stores in advance a program or the like for executing a sewing process (see FIG. 12) described later. The RAM 13 temporarily stores various information generated during execution of various processes. The RAM 13 stores the first flag. The first flag indicates whether or not the sewing operation by the sewing device 1 is completed. When the first flag is 0, the sewing device 1 has not finished the sewing operation, and when the first flag is 1, the sewing device 1 has finished the sewing operation. The storage device 14 is non-volatile and stores various set values.

Each drive circuit 181 to 189 is connected to the output interface 88. The drive circuit 181 is connected to the sewing machine motor 81 and drives the sewing machine motor 81 based on the control command of the CPU 11. The sewing machine motor 81 can transition to a specific excitation state. The specific excitation state is the excitation state of the sewing machine motor 81 that holds the output shaft 81A (see FIG. 4) at a predetermined rotation position. When the sewing machine motor 81 is in the specific excitation state, the output shaft 81A of the sewing machine motor 81 becomes difficult to rotate. The drive circuit 182 is connected to the X-moving pulse motor 82 and drives the X-moving pulse motor 82 based on the control command of the CPU 11. The drive circuit 183 is connected to the Y-moving pulse motor 83 and drives the Y-moving pulse motor 83 based on the control command of the CPU 11. The drive circuit 184 is connected to the thread trimming pulse motor 57 and drives the thread trimming pulse motor 57 based on the control command of the CPU 11. The drive circuit 185 is connected to the right air cylinder 219 and drives the right air cylinder 219 based on the control command of the CPU 11. The drive circuit 186 is connected to the left air cylinder 239 and drives the left air cylinder 239 based on the control command of the CPU 11. The drive circuit 187 is connected to the vertical drive unit 310 and drives the vertical drive unit 310 based on the control command of the CPU 11. The drive circuit 188 is connected to the lock drive unit 352 and drives the lock drive unit 352 based on the control command of the CPU 11. The drive circuit 189 is connected to the display unit 198 and displays various information on the display unit 198 based on the control command of the CPU 11.

The power supply SW15, encoders 191 to 194, operation unit 196, and the like are connected to the input interface 87. The power supply SW15 turns on the power of the sewing device 1. The encoder 191 is connected to the sewing machine motor 81 and detects the rotation position and the rotation speed of the output shaft 81A of the sewing machine motor 81. The CPU 11 inputs the detection result of the encoder 191 to the input interface 87. The detection result of the encoder 191 indicates the vertical position of the needle bar 24 and the sewing needle 39. The encoder 192 is connected to the X-moving pulse motor 82, and detects the rotation direction, the rotation position (that is, the rotation angle phase), and the rotation speed of the output shaft of the X-movement pulse motor 82. The CPU 11 inputs the detection result of the encoder 192 to the input interface 87. The rotation angle phase of the output shaft of the X-moving pulse motor 82 indicates the left-right position of the needle bar mechanism 2 and the hook mechanism 4. The encoder 193 is connected to the Y-moving pulse motor 83, and detects the rotation direction, the rotation position (that is, the rotation angle phase), and the rotation speed of the output shaft of the Y-movement pulse motor 83. The CPU 11 inputs the detection result of the encoder 193 to the input interface 87. The rotation angle phase of the output shaft of the Y-moving pulse motor 83 indicates the position in the front-rear direction of the cloth holder 95. The encoder 194 is connected to the thread trimming pulse motor 57, and detects the rotation direction, rotation position, and rotation speed of the output shaft of the thread trimming pulse motor 57. The CPU 11 inputs the detection result of the encoder 194 to the input interface 87. The operation unit 196 detects various instructions, and the CPU 11 inputs the detection result of the operation unit 196 to the input interface 87.

The sewing process will be described with reference to FIGS. 6 and 12 to 16. Before the start of the sewing process, the sewing device 1 is in the initial state. When the sewing device 1 is in the initial state, the upper support 22 is in the operating position and the locking member 351 is in the locking position and fits into the fitting hole 354 (see FIG. 6). When the operator operates the power switch 15 to turn on the power of the sewing device 1, the CPU 11 starts the sewing process.

The CPU 11 overwrites the first flag of storage in the RAM 13 with 0 and stores it (S11). The CPU 11 puts the sewing machine motor 81 in a specific excitation state (S13). The output shaft 81A (see FIG. 4) of the sewing machine motor 81 is in a state where it is difficult to rotate.

The CPU 11 drives and controls the lock drive unit 352 to move the lock member 351 from the lock position to the unlock position (S15). The lock member 351 disengages rearward from the fitting hole 354 (arrow P1 in FIG. 6) and retracts rearward from the movable range of the upper support 22. The upper support 22 can move upward. The CPU 11 drives and controls the vertical drive unit 310 to raise the upper support 22 from the operating position to the retracted position (S17). When the upper support 22 is raised (arrow R1 in FIG. 6), the distance between the axis of the upper shaft 25 and the axis of the upper spline shaft 3 becomes shorter, and the toothed belt 73 loosens (see FIG. 13). The first belt facing member 75 and the second belt facing member 76 prevent the toothed belt 73 from falling off from the drive pulley 71 and the driven pulley 72. The upper right portion of the upper support 22 that rises toward the operating position hits the upper movable portion 331 (see FIG. 5) of the upper damper 330 from the lower side. The upper damper 330 absorbs the rising momentum of the upper support 22 via the upper movable portion 331, and the upper support 22 decelerates. The upper support 22 reaches the retracted position (see FIGS. 13 and 14), and the vertical drive unit 310 is driven and stopped.

The CPU 11 drives and controls the lock drive unit 352 to move the lock member 351 from the unlocked position to the locked position (S19). The lock member 351 moves to a position directly below the facing portion 355 (arrow Q1 in FIG. 14) and enters the movable range of the upper support 22. The lock mechanism 350 restricts the downward movement of the upper support 22 in the retracted position.

The CPU 11 drives and controls the right air cylinder 219 and the left air cylinder 239 to move the upper frame 93 upward (see FIG. 1) (S21). The upper frame 93 is separated upward from the lower frame 92. The CPU 11 determines whether or not the first flag stored in the RAM 13 is 1 (S23). When the first flag is 0 (S23: NO), the CPU 11 determines whether or not the upper frame lowering instruction has been detected (S25). The upper frame lowering instruction is an instruction for moving the upper frame 93, which is separated upward from the lower frame 92, downward. The CPU 11 waits until the operator inputs the upper frame lowering instruction to the operation unit 196 (S25: NO). When the operator arranges the cloth between the lower frame 92 and the upper frame 93 and inputs the upper frame lowering instruction to the operation unit 196 (S25: YES), the CPU 11 drives the left air cylinder 239 and the right air cylinder 219. Controlled to lower the upper frame 93 (S27). The cloth holder 95 (see FIG. 1) sandwiches the cloth between the upper frame 93 and the lower frame 92.

The CPU 11 drives and controls the lock drive unit 352 to move the lock member 351 from the lock position to the unlock position (S29). The lock member 351 exits rearward from the movable range of the upper support 22 (arrow Q2 in FIG. 14). The upper support 22 in the retracted position can move downward. The CPU 11 drives and controls the vertical drive unit 310 to move the upper support 22 from the retracted position to the operating position (S31). The upper support 22 descends together with the drive shaft 311 at a speed faster than free fall (arrow R2 in FIG. 14). When the upper support 22 is lowered, the lower surface of the installation portion 321 comes into contact with the lower movable portion 341 of the lower damper 340 (see FIG. 5) from above. The lower damper 340 absorbs the downward momentum of the upper support 22 via the lower movable portion 341, and the upper support 22 decelerates. The lower end of the bolt 329 (see FIG. 5) comes into contact with the upper surface 372 at the rear of the installation portion 371. The bolt 329 stops the upper support 22 at the operating position. The vertical drive unit 310 is driven and stopped (S31).

The CPU 11 drives and controls the lock drive unit 352 to move the lock member 351 from the unlocked position to the locked position (S33). The lock member 351 moves forward (arrow P2 in FIG. 6) and fits into the fitting hole 354. The locking mechanism 350 restricts the upward movement of the upper support 22 in the operating position. The CPU 11 drives and controls the sewing machine motor 81 to release the specific excitation state of the sewing machine motor 81 (S35).

The CPU 11 drives and controls the sewing machine motor 81, the X-moving pulse motor 82, and the Y-moving pulse motor 83 to execute the sewing operation (S37). When the sewing machine motor 81 is driven, the synchronization mechanism 8 synchronously drives the hook mechanism 4 and the needle bar mechanism 2. The needle bar 24 and the hook 16 operate in synchronization with each other. By driving the X-moving pulse motor 82, the X-moving mechanism 6 integrally moves the hook mechanism 4 and the needle bar mechanism 2 in the left-right direction. By driving the Y-moving pulse motor 83, the Y-moving mechanism 7 moves the cloth holder 95 that holds the cloth in the front-rear direction. The hook 16 entangles the bobbin thread drawn from the bobbin case with the needle thread held by the sewing needle 39 below the needle hole 53. The balance 29 pulls the needle thread entwined with the bobbin thread onto the needle plate 50 to form a stitch on the cloth. The thread trimming pulse motor 57 is driven after the stitch is formed, so that the thread trimming mechanism cuts the needle thread and the bobbin thread (S37).

The CPU 11 overwrites the first flag of storage in RAM 13 with 1 and stores it (S39), and shifts the processing to S13. The CPU 11 executes the above-mentioned S13 to S21. After the upper support 22 moves from the operating position to the retracted position, the lock member 351 moves to the locked position, and the upper frame 93 moves upward from the cloth. Since the first flag is 1, (S23: NO), the CPU 11 that has executed S23 shifts the processing to S41. The CPU 11 releases the specific excitation state of the sewing machine motor 81 and ends the sewing process. At the end of the sewing process, the upper support 22 is in the retracted position, so that the operator can take out the sewn cloth without being caught by the sewing needle 39.

With reference to FIGS. 8, 9, 15, and 16, the work of adjusting the support position of the upper support 22 with respect to the upper base 37 in the front-rear direction will be described. By adjusting the support position of the upper support 22 in the front-rear direction, the operator adjusts the position of the needle bar 24 relative to the hook 16 so that the sewing needle 39 is located directly above the needle hole 53 (see FIG. 2). Can be optimized. At the start of work, the upper support 22 is in the operating position.

With reference to FIGS. 8, 9, and 15, the adjustment work of displacing the support position of the upper support 22 rearward will be described. Before the adjustment work, the sewing needle 39 is in the front-rear direction position on the front side of the center of the needle hole 53. The operator loosens the four fastening members 415 to the extent that they do not fall off, and makes the upper support 22 movable back and forth with respect to the upper base 37.

The operator inserts the shaft portion 425A of the bolt 425 into the through hole 428 (see FIG. 16) of the second wall portion 422 from the rear and hits the facing hole 424 of the first wall portion 421. The operator rotates the bolt 425 in the fastening rotation direction (arrow V) in which the head 425B is displaced forward. After the shaft portion 425A begins to screw into the facing hole 424, the head portion 425B comes into contact with the second wall portion 422 from behind. The operator further rotates the bolt 425 in the fastening rotation direction. As the shaft portion 425A is further screwed into the facing hole 424, the bolt 329 urges the upper support 22 rearward through the facing hole 424. Therefore, the upper support 22 moves backward (arrow W). At this time, the pair of connecting bodies 63 (see FIG. 4) are displaced rearward together with the upper support 22 while the fastening member 415 is inserted into the elongated hole 414 and screwed into the fastening hole 413. When the sewing needle 39 moving together with the upper support 22 reaches directly above the needle hole 53, the operator stops the rotation of the bolt 425 and fastens the four fastening members 415 to the fastening holes 413, respectively. The upper support 22 is fixed to the upper base 37. The operator rotates the bolt 425 in the direction opposite to the fastening rotation direction. The bolt 425 disengages from the facing hole 424 and the through hole 428. The worker finishes the adjustment work.

With reference to FIGS. 8, 9, and 16, the adjustment work of displacing the support position of the upper support 22 forward will be described. Before the adjustment work, the sewing needle 39 is located in the front-rear direction position behind the center of the needle hole 53. Hereinafter, the description overlapping with the above-mentioned adjustment work of displacing the support position of the upper support 22 rearward will be simplified. The operator loosens the four fastening members 415 to the extent that they do not fall off.

The operator screwes the shaft portion 425A of the bolt 425 into the screw hole 423 of the second wall portion 422 from the rear. The operator further rotates the bolt 425 screwed into the screw hole 423 in the fastening rotation direction (arrow A in FIG. 16). As the bolt 425 rotates, the shaft portion 425A is displaced forward and comes into contact with the first wall portion 421 from the rear. At this time, the head 425B is separated rearward from the second wall portion 422. When the operator further rotates the bolt 425 in the fastening rotation direction, the shaft portion 425A urges the first wall portion 421 forward. Therefore, the upper support 22 moves forward (arrow B). When the sewing needle 39 moving together with the upper support 22 reaches directly above the needle hole 53, the operator stops the rotation of the bolt 425 and fastens the four fastening members 415 to the fastening holes 413, respectively. The operator rotates the bolt 425 in the direction opposite to the fastening rotation direction. The bolt 425 comes off the screw hole 423. The worker finishes the adjustment work.

With reference to FIG. 5, the work of adjusting the operating position of the upper support 22 in the vertical direction by the operator will be described. The upper support 22 is in a retracted position at the start of work, for example. The operator rotates the nut 323 and moves it upward along the bolt 329. The bolt 329 can move up and down together with the lower damper 340. After moving the bolt 329 to a desired vertical position, the operator rotates the nut 323 and presses it against the upper surface of the installation portion 321. The fixing portion 325 fixes the bolt 329. Therefore, the operator can adjust the operating position of the upper support 22 to a desired vertical position.

As described above, when the upper support 22 is in the operating position, the X moving mechanism 6 integrally moves the upper base 37 and the lower base 42 in the left-right direction. The hook 16 and the needle bar mechanism 2 move integrally in the left-right direction, and the sewing device 1 executes a sewing operation on the cloth. When the upper support 22 is in the retracted position, the lock member 351 that has moved to the lock position faces the facing portion 355 from below. Therefore, the lock mechanism 350 regulates the lowering of the upper support 22 toward the operating position. Therefore, when the upper support 22 that supports the needle bar 24 that can move up and down is in the retracted position that is retracted upward from the operating position during the sewing operation, the sewing device 1 moves the upper support 22 against the intention of the operator. You can regulate the downward movement of.

The CPU 11 moves the upper support 22 from the operating position to the retracted position (S17), and then moves the lock member 351 from the unlocked position to the locked position (S19). The lock member 351 moves to the lock position under the control of the CPU 11. Therefore, the sewing device 1 can move the lock member to the lock position at an appropriate time. Therefore, the lock member 351 that moves toward the lock position does not come into contact with the upper support 22 that is moving up and down.

Before executing the sewing operation (S37), the CPU 11 moves the upper support 22 to the operating position (S31) and moves the lock member 351 to the locked position (S33). The lock member 351 fits into the fitting hole 354, and the lock mechanism 350 restricts the upward movement of the upper support 22 in the operating position. During the sewing operation of the sewing device 1, the sewing device 1 can restrict the movement of the upper support 22 to the retracted position even when an upward external force generated by a sudden factor acts on the upper support 22.
Therefore, the sewing device 1 can stabilize the sewing operation.

The sewing device 1 includes an adjusting mechanism 400. The adjusting mechanism 400 adjusts the support position of the upper support 22 with respect to the upper base 37 in the front-rear direction. Therefore, the sewing device 1 can optimize the positional relationship between the needle bar 24 and the needle hole 53 in the front-rear direction so that the sewing needle 39 is located directly above the needle hole 53. For example, when the movement direction of the lock member 351 is not the front-rear direction but the left-right direction, it may be necessary to adjust the position of the lock member 351 in the front-rear direction as the position of the needle bar 24 is adjusted by the adjustment mechanism 400. There is sex. In the present embodiment, the position adjusting direction of the needle bar 24 by the adjusting mechanism 400 and the moving direction of the lock member 351 are both in the front-rear direction. Therefore, even when the adjusting mechanism 400 adjusts the front-back direction position of the needle bar 24, the sewing device 1 does not need to adjust the front-back direction position (that is, the movable range) of the lock member 351. Therefore, the sewing device 1 can simplify the position adjustment of the needle bar 24 by the adjusting mechanism 400.

When the lower movable portion 341 comes into contact with the upper support 22 that descends toward the operating position by the driving force of the vertical drive portion 310, the lower damper 340 decelerates the upper support 22. Therefore, the sewing device 1 can absorb the momentum of the upper support 22 descending from the retracted position to the operating position by the lower damper 340. Therefore, the sewing device 1 can suppress damage to the installation portion 321 and the upper support 22 and the like.

When the bolt 329 comes into contact with the upper support 22, the positioning portion 320 positions the upper support 22 at the operating position. Therefore, the sewing device 1 can stably stop the upper support 22 descending from the retracted position at the operating position.

By loosening the nut 323, the operator moves the bolt 329 inserted through the screw hole 322 up and down. Therefore, since the fixing position of the bolt 329 with respect to the fixing portion 325 can be adjusted in the vertical direction, the positioning portion 320 can adjust the operating position of the upper support 22 in the vertical direction. Therefore, the sewing device 1 can stabilize the sewing operation.

The upper movable portion 331 comes into contact with the upper support 22 that rises from the operating position to the retracted position by the driving force of the vertical driving portion 310, so that the upper damper 330 decelerates the upper support 22. Therefore, the sewing device 1 can absorb the momentum of the upper support 22 rising from the operating position to the retracted position by the upper damper 330. Therefore, the sewing device 1 can suppress damage to the upper support 22 and the like.

The distance between the axis of the upper shaft 25 and the axis of the upper spline shaft 3 is shorter when the upper support 22 is in the retracted position than when it is in the operating position. The facing distance between the first belt facing member 75 and the first portion 73C and the facing distance between the second belt facing member 76 and the second portion 73D are both equal to or less than the maximum protrusion amount of the tooth portion 73B (dimension L in FIG. 5). Is. Therefore, even when the toothed belt 73 loosens as the upper support 22 rises to the operating position, the first belt facing member 75 and the second belt facing member 76 still have the drive pulley 71 and the driven pulley of the toothed belt 73. It is possible to suppress the dropout from 72. Therefore, for example, the operator does not bridge the dropped toothed belt 73 between the drive pulley 71 and the driven pulley 72, and the phase relationship between the drive pulley 71 and the driven pulley 72 does not shift. Therefore, the sewing device 1 can suppress the phase shift between the drive pulley 71 and the driven pulley 72.

Before the upper support 22 moves to the retracted position (S17), the CPU 11 puts the sewing machine motor 81 in a specific excitation state (S13). The output shaft 81A of the sewing machine motor 81 in the specific excitation state is difficult to rotate. When the posture of the toothed belt 73 changes as the upper support 22 rises to the retracted position, the toothed belt 73 urges the drive pulley 71 in the rotational direction, and the rotational force acts on the drive pulley 71. There is a time. Even at this time, since the sewing machine motor 81 is in the specific excitation state, the drive pulley 71 is difficult to rotate. Therefore, when the upper support 22 rises from the operating position to the retracted position, the sewing device 1 can suppress the toothed belt 73 from falling off from the drive pulley 71 and the driven pulley 72.

In the above description, the upper support 22 is an example of the support of the present invention. The X moving mechanism 6 is an example of the moving mechanism of the present invention. Bolt 329 is an example of a contact portion of the present invention. The upper spline shaft 3 is an example of the spline shaft of the present invention. The left-right direction is an example of the first direction of the present invention. The anteroposterior direction is an example of the second direction of the present invention. The CPU 11 that executes S17 is an example of the evacuation control unit of the present invention. The CPU 11 that executes S19 is an example of the first lock control unit of the present invention. The CPU 11 that executes S13 is an example of the excitation control unit of the present invention. The CPU 11 that executes S33 is an example of the second lock control unit of the present invention.

The present invention is not limited to the above examples. The lock member 351 may be, for example, a shaft member whose axial direction is from the front upper part to the rear lower part, instead of the shaft member whose axial direction is the front-rear direction. In this case, the lock member 351 may move in the axial direction and move between the lock position and the unlock position. The lock member 351 may be, for example, a rectangular parallelepiped member instead of the shaft member. In this case, the tubular portion 353 may have a square tubular shape instead of a cylindrical shape.

The upper support 22 in the retracted position may freely fall toward the operating position, for example, triggered by the drive of the vertical drive unit 310, instead of descending faster than the free fall by the driving force of the vertical drive unit 310. .. The upper damper 330 and the lower damper 340 may be, for example, elastic members instead of the hydraulic damper, as long as the descending upper support 22 can be decelerated. Elastic members are provided at the upper part and the lower part of the upper base 37, respectively. The vertical drive unit 310 and the lock drive unit 352 may be, for example, a solenoid or a motor instead of the air cylinder.

The lock member 351 in the operating position may come into contact with the facing portion 355 of the upper support 22 in the retracted position so as to face each other. Instead of fitting the lock member 351 in the operating position into the fitting hole 354 of the upper support 22 in the operating position, for example, the lock member 351 may face the upper support 22 in the operating position with a gap from above. good.

1 Sewing device 2 Needle bar mechanism 3 Upper spline shaft 4 Pot mechanism 6 X Moving mechanism 8 Synchronous mechanism 10 Base part 11 CPU
16 Kama 18 1st drive transmission unit 19 2nd drive transmission unit 22 Upper support 24 Needle bar 25 Upper shaft 37 Upper base 39 Sewing needle 42 Lower base 50 Needle plate 53 Needle hole 71 Drive pulley 72 Driven pulley 73 Toothed belt 73A Base 73B Tooth 73C First part 73D Second part 75 First belt facing member 76 Second belt facing member 81 Sewing machine motor 81A Output shaft 310 Vertical drive part 320 Positioning part 325 Fixed part 329 Bolt 330 Upper damper 340 Lower damper 350 Lock mechanism 351 Lock member 352 Lock drive part 353 Cylindrical part 354 Fitting hole 355 Opposing part 400 Adjustment mechanism

Claims (10)

A hook mechanism having a lower base, a needle plate including a needle hole provided in the lower base, and a hook below the needle hole and provided in the lower base.
An upper base, a support that is movably connected to the upper base, and a needle bar that is movably supported by the support and has a sewing needle attached to the lower end above the needle hole. With the needle bar mechanism
It is equipped with a moving mechanism that integrally moves the hook mechanism and the needle bar mechanism in the first direction parallel to the horizontal direction.
The needle bar mechanism is provided on the upper base, and the support is moved up and down between an operating position at which the sewing needle can pass through the needle hole and a retracting position retracted upward from the operating position. Equipped with a vertical drive unit
When the support is in the operating position, the hook and the needle bar operate in synchronization with each other while the moving mechanism moves the hook mechanism and the needle bar mechanism to perform sewing on the sewing object. In sewing equipment
The upper base is equipped with a lock mechanism.
The lock mechanism is
A lock member that moves between a lock release position that exits the movable range of the support and a lock position that enters the movable range of the support and faces the support in the retracted position from below. ,
A lock drive unit that moves the lock member between the unlocked position and the locked position.
Equipped with
The lock member is
When in the unlocked position, the support in the retracted position is not restricted from moving towards the actuating position.
A sewing device comprising restricting the support in the retracted position from moving toward the operating position when in the locked position . A control unit that drives and controls the vertical drive unit and the lock drive unit is provided.
The control unit
An evacuation control unit that drives and controls the vertical drive unit to move the support from the operating position to the evacuation position.
It is characterized by including a first lock control unit that drives and controls the lock drive unit to move the lock member from the unlocked position to the lock position after the support is moved by the evacuation control unit. The sewing device according to claim 1. The lock member is a shaft member that extends in the horizontal direction and moves between the unlocked position and the locked position along the axial direction.
The support includes a fitting hole that opens toward the lock member at the unlocked position in the actuated position and comprises a tubular portion extending in the axial direction.
When the lock member is in the lock position, the lock member is fitted into the fitting hole of the tubular portion.
The sewing according to claim 2, wherein the control unit includes a second lock control unit that moves the lock member from the unlocked position to the lock position when the support is in the operating position. Device. The needle bar mechanism includes an adjusting mechanism for adjusting the support position of the support with respect to the upper base in a second direction parallel to the horizontal direction and orthogonal to the first direction.
The sewing device according to claim 2 or 3, wherein the lock member moves between the lock position and the unlock position along an axial direction parallel to the second direction. Claims 1 to 4 provided on the upper base and provided with a lower damper that comes into contact with the support moving from the retracted position toward the operating position from below and decelerates the support. The sewing device according to any one of the above. The sewing apparatus according to claim 5, further comprising a positioning portion provided on the upper base and positioning the support in contact with the lower damper at the operating position. The positioning unit is
A contact portion that contacts and stops the support from below,
The sewing apparatus according to claim 6, further comprising a fixing portion provided on the upper base, fixing the contact portion, and adjusting the fixing position of the contact portion in the vertical direction. The upper base is provided with an upper damper that is provided on the upper base and comes into contact with the support that moves from the operating position toward the retracted position by the driving force of the vertical drive unit from above and decelerates the support. The sewing apparatus according to any one of claims 1 to 7, wherein the sewing apparatus is characterized. The base portion that supports the hook mechanism and the moving mechanism, and
It has a sewing machine motor fixed to the base portion, a first drive transmission unit that transmits the driving force of the sewing machine motor to the needle rod, and a second drive transmission unit that transmits the driving force of the sewing machine motor to the kettle. A synchronization mechanism for synchronously driving the needle bar and the kettle with the driving force of the sewing machine motor is provided.
The first drive transmission unit is
A spline shaft that extends in the first direction, is rotatably supported by the base portion around the axis, and is rotated by the driving force of the sewing machine motor.
A drive that is a toothed pulley that is rotatably supported by the upper base with the first direction as the axial direction, is movably fitted to the spline shaft in the first direction, and rotates integrally with the spline shaft. With the pulley,
An upper shaft that is rotatably supported by the support with the first direction as the axial direction and is connected to the needle bar.
A driven pulley, which is a toothed pulley fixed to the upper shaft,
A tooth having an annular base that bridges the drive pulley and the driven pulley, and a plurality of tooth portions that are arranged at equal intervals in the extending direction of the base, and that mesh with the drive pulley and the driven pulley. With a belt and
A first belt facing member provided on the upper base and facing the first portion of the toothed belt that meshes with the drive pulley with a gap.
A second belt facing member provided on the support and facing the second portion of the toothed belt that meshes with the driven pulley with a gap is provided.
The distance between the upper shaft and the spline shaft is shorter when the support is in the retracted position than when the support is in the operating position.
The facing distance between the first belt facing member and the first portion and the facing distance between the second belt facing member and the second portion are both equal to or less than the maximum protrusion amount of the tooth portion with respect to the base portion. The sewing apparatus according to any one of claims 1 to 8 , wherein the sewing device is provided. The base portion that supports the hook mechanism and the moving mechanism, and
It has a sewing machine motor fixed to the base portion, a first drive transmission unit that transmits the driving force of the sewing machine motor to the needle rod, and a second drive transmission unit that transmits the driving force of the sewing machine motor to the kettle. A synchronization mechanism for synchronously driving the needle bar and the kettle with the driving force of the sewing machine motor is provided.
The sewing machine motor includes an output shaft connected to the first drive transmission unit and the second drive transmission unit.
The control unit includes an excitation control unit that drives and controls the sewing machine motor to bring the excitation state of the sewing machine motor into a specific excitation state in which the output shaft is held at a predetermined rotational position.
2. The evacuation control unit is characterized in that, after the drive control of the sewing machine motor by the excitation control unit, the vertical drive unit is driven and controlled to move the support from the operating position to the retracted position. The sewing machine described in.

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