JP6584964B2 - Sewing machine cutting device - Google Patents

Description

  The present invention relates to a sewing product cutting apparatus that is attached to a sewing machine and can cut a sewing product such as cloth or leather.

  2. Description of the Related Art Conventionally, a sewing machine cutting apparatus for a sewing machine has a fixed frame fixedly attached to a sewing machine body and a movable frame movably attached to the fixed frame. The movable frame is rotatably provided with a rotation shaft to which a rotary blade is attached with a screw. The fixed frame includes a driving unit that drives the rotating shaft via a power transmission unit, and an operating unit that operates the movable frame to move the rotary blade from the non-cutting position of the sewing product to the cutting position of the sewing product. Is provided. The fixed blade that cuts the sewing object in cooperation with the rotary blade is formed on a movable frame (for example, Patent Document 1) or a needle plate provided on the bed portion side that fixes the sewing machine body. (For example, Patent Document 2). The rotary blade has an attachment hole formed substantially at the center. The attachment hole is fitted into the rotation shaft, and a screw is screwed to the end of the rotation shaft, thereby being attached to the rotation shaft.

JP 2007-37650 A JP 2012-65796 A

  In the sewing machine cutting apparatus described above, when replacing the rotary blade, the rotary shaft is unscrewed, the rotary blade is slid in the axial direction of the rotary shaft, and the rotary blade is removed from the rotary shaft. The new rotary blade is attached to the rotary shaft by fitting the mounting hole into the rotary shaft and screwing a screw to the end of the rotary shaft. In this way, the sewing machine cutting apparatus for the sewing machine can replace the rotary blade. The rotary blade of the sewing machine workpiece cutting device is disposed in the vicinity of the sewing needle, and cuts the sewing product parallel to the seam formed by sewing the sewing needle. However, due to the presence of top feed, there is a problem that it is difficult to replace the shaft after removing it from the rotating shaft. Therefore, replacement of the rotary blade must be performed by removing the sewing needle, cloth presser, top feed, etc. from the sewing machine body, or by removing the sewing material cutting device itself, which is inconvenient and easy for anyone to do. There was a problem that could not. Further, the sewing machine cutting device for a sewing machine can be cut at the same time as sewing, and can also be cut at the time of non-sewing, and conversely, it can be cut off at the time of sewing. If the cutting is not performed at the time of sewing, the rotary blade is close to the point where the sewing needle drops, so that the presence of the rotary blade interferes with the problem that the sewing work becomes difficult.

  The invention of the present application has been devised in view of the above problems, and the rotary blade can be moved to a position away from the sewing needle, the replacement space for the rotary blade can be secured, and anyone can easily replace the rotary blade. It is a first object of the present invention to provide a sewing machine cutting apparatus that can perform sewing. In addition to the above-mentioned object, the present invention provides a sewing machine sewing machine cutting apparatus that can increase the safety by allowing the rotary blade to rotate at the cutting position and rotating the rotary blade at other than the cutting position. The purpose of 2. Furthermore, in addition to the above object, the present invention provides a sewing machine cover that facilitates sewing work by moving the rotary blade to a position away from the sewing needle during sewing work with a sewing needle that does not involve cutting work to be sewn. A third object is to provide a sewn product cutting device.

  According to a first aspect of the present invention, there is provided a sewing machine cutting device for a sewing machine having a rotary blade for cutting the sewing material on a bed portion of the sewing machine in order to achieve the first object. A fixed frame that is fixedly attached to the sewing machine body and a movable frame that is attached to the fixed frame via a coupling means, the movable frame comprising a transmission shaft provided on one side of the fixed frame, A rotation shaft provided on the other side; transmission means for transmitting the rotation of the transmission shaft to the rotation shaft; and the rotary blade fixed to the rotation shaft; the fixed frame being driven by the drive means A power transmission unit configured to transmit the power of the shaft and the drive shaft to the transmission shaft, and the connecting means is configured so that the surface of the rotary blade faces the longitudinal direction of the bed portion, and the rotary blade The surface is inclined in the direction substantially perpendicular to the longitudinal direction of the bed As it can be moved to the exchange position of the rotary blade that is characterized by linking the movable frame rotatably to the fixed frame.

  According to a second aspect of the present invention, in order to achieve the first object, the connecting means is rotatably attached to the fixed frame so as to rotate in a direction substantially parallel to the bed portion. The movable frame is configured such that one side of the movable frame is rotatably attached to the coupled body, and the rotary blade on the other side of the movable frame is movable in the vertical direction. And

  According to a third aspect of the present invention, in order to achieve the first object, the power transmission unit is flexibly connected to the first connecting shaft and the first connecting shaft. The second connecting shaft is configured such that the first connecting shaft is connected to the drive shaft, the second connecting shaft is connected to the transmission shaft, and the bent portion substantially coincides with the rotation center of the connecting means. It is characterized by.

  In the sewing machine cutting apparatus according to claim 4 of the present application, in order to achieve the second object, the connecting means is provided with a switch means for turning on / off a driving means for driving the rotary blade. The switch means is turned on when the rotary blade is in the cutting position, and is turned off when the rotary blade is in the non-cutting position.

  According to a fifth aspect of the present invention, in order to achieve the second object, the connecting means includes a first positioning means for positioning the rotary blade at the cutting position, and a rotary blade replacement position. And a switch means for turning on and off a driving means for driving the rotary blade, the switch means being provided in the first positioning means, and the first positioning means is the rotary blade. Is turned on when the first positioning means is not positioned and the first positioning means is turned off.

  In order to achieve the third object, the sewing device cutting apparatus for a sewing machine according to claim 6 of the present application can move the connecting means from the cutting position of the rotary blade to the replacement position of the rotary blade. The movable frame is rotatably connected to the fixed frame so that the movable frame can be moved from the position to the standby position of the rotary blade.

  A sewing machine cutting device for a sewing machine according to the present invention has a rotary blade for cutting a sewing product on a bed portion of the sewing machine. A sewing machine cutting apparatus for a sewing machine includes a fixed frame fixedly attached to a sewing machine body and a movable frame attached to the fixed frame via a connecting means. The movable frame includes a transmission shaft provided on one side thereof, a rotation shaft provided on the other side thereof, transmission means for transmitting rotation of the transmission shaft to the rotation shaft, and the fixed to the rotation shaft. A rotating blade. The fixed frame is provided with a drive shaft that is driven by drive means and a power transmission unit that transmits the power of the drive shaft to the transmission shaft. The connecting means is provided from a cutting position of the rotary blade in which the surface of the rotary blade faces the longitudinal direction of the bed portion to an exchange position of the rotary blade in which the surface of the rotary blade is inclined in a direction substantially orthogonal to the longitudinal direction of the bed portion. The movable frame is rotatably connected to the fixed frame so that it can move.

  In the sewing machine cutting apparatus according to the present invention, when the driving means is operated, the driving shaft on the fixed frame side is driven, and the power of the driving shaft is transmitted to the transmission shaft on the movable frame side via the power transmission unit. The transmission shaft rotates. When the transmission shaft rotates, the rotation shaft is rotated by the transmission means, and the rotary blade fixed to the rotation shaft also rotates. The rotary blade cooperates with a fixed blade provided on the movable frame or a fixed blade formed on the bed portion side of the sewing machine, and cuts the workpiece on the bed portion. When the drive means is stopped, the rotation of the transmission shaft, the rotary shaft and the rotary blade stops. The rotary blade is located in the vicinity of the sewing needle, and the surface of the rotary blade faces the direction side (longitudinal direction side of the bed portion) substantially orthogonal to the sewing direction of the sewing needle. The rotary blade in the cutting position has its surface facing the sewing needle side, and even if it is pulled out from the rotary shaft and removed, the rotary blade surface comes in contact with the sewing needle, presser foot, top feed, etc. It cannot be removed from the rotation axis.

  In the sewing machine cutting apparatus according to the present invention, when the movable frame is rotated with respect to the fixed frame by the connecting means, the rotary blade moves from the cutting position to the replacement position, and the surface of the rotary blade is the length of the bed portion. The direction is inclined toward the direction substantially perpendicular to the direction. The rotary blade in the replacement position is away from the sewing needle, the surface of the rotary blade faces the operator side, and there is no sewing needle, cloth presser, top feed, etc. that could contact the surface of the rotary blade. Therefore, it can be easily extracted from the rotating shaft and removed without touching anywhere. As described above, the sewing machine cutting device according to the present invention can move the rotary blade from the cutting position to the replacement position, can secure a replacement space for the rotary blade, and anyone can easily replace the rotary blade. There is an effect that can be performed.

  The sewing machine cutting apparatus according to the present invention is a coupling body rotatably attached to a fixed frame so that the coupling means rotates in a direction substantially parallel to the bed portion. One side of the movable frame is rotatably attached to the connection body, and the rotary blade on the other side of the movable frame is configured to move in the vertical direction.

  Since the surface of the rotary blade faces the longitudinal direction side (sewing needle side) of the bed portion at the cutting position of the rotary blade, the sewing machine cutting apparatus according to the present invention extracts the rotary blade from the rotary shaft. Even if it is going to be removed, the surface of the rotary blade comes into contact with the sewing needle and it is difficult to remove it from the rotary shaft. In the sewing machine cutting apparatus according to the present invention, the movable frame is rotated with respect to the coupling body, and the rotary blade on the other side of the movable frame is moved upward to separate the rotary blade from the sewing needle. Next, when the coupling body is rotated with respect to the fixed frame, the rotary blade is separated from the sewing needle in the horizontal direction, and the surface of the rotary blade is inclined toward the direction substantially perpendicular to the longitudinal direction of the bed portion. It will be. In this way, the surface of the rotary blade is away from the sewing needle, and the surface of the rotary blade is facing the operator side, and there are no sewing machine parts such as the sewing needle, presser foot, and top feed that touch the surface of the rotary blade. The rotary blade can be easily extracted from the rotary shaft without being removed. As described above, the sewing machine cutting apparatus according to the present invention has an effect that the rotary blade can be safely moved from the cutting position to the replacement position without difficulty.

  In the sewing machine workpiece cutting device according to the present invention, the power transmission unit includes a first connecting shaft and a second connecting shaft that is flexibly connected to the first connecting shaft. The first connecting shaft is connected to the drive shaft, and the second connecting shaft is connected to the transmission shaft. The bent portions of the first connecting shaft and the second connecting shaft are configured to substantially coincide with the rotation center of the connecting means. In the sewing machine cutting apparatus according to the present invention, since the rotation center of the connecting means and the bent portion of the power transmission portion are substantially coincident, the power transmission portion bends smoothly and smoothly when the connecting means is rotated. However, there is an effect that the load applied to the power transmission portion is small and it is difficult to break.

  In the sewing machine cutting apparatus according to the present invention, the connecting means is provided with switch means for turning on / off a driving means for driving the rotary blade. The switch means is turned on when the rotary blade is in the cutting position, and is turned off when the rotary blade is in the non-cutting position. Thus, in the sewing machine cutting apparatus according to the present invention, the switch means is turned on and the rotary blade rotates at the cutting position, but the rotary blade does not rotate at the non-cutting position. There is an effect that it can be exchanged.

  The sewing machine cutting apparatus for a sewing machine according to the present invention comprises: a first positioning means for positioning the rotary blade at the cutting position; a second positioning means for positioning the rotary blade at the replacement position; Switch means for turning on and off the driving means for driving. The switch means is provided in the first positioning means, and is configured to turn on when the first positioning means positions the rotary blade, and to be turned off when the first positioning means does not position the rotary blade. Yes.

  In the sewing machine cutting apparatus according to the present invention, when the rotary blade is positioned by the first positioning means at the cutting position, the switch means is turned on, and when the driving means is operated, the rotary blade is rotated to remove the sewing product. Disconnect. When the driving means is stopped, the rotation of the rotary blade stops. When the positioning of the first positioning means is released, the switch means is turned off, and the rotary blade does not rotate even if the driving means is operated.

  Even if the rotary blade is positioned by the second positioning means at the replacement position, the switch means is in an OFF state and the rotary blade is not rotatable. Can be safely replaced. Further, since the rotary blade is positioned, it is stable and can be easily and easily replaced. As described above, the sewing machine sewing apparatus according to the present invention can position the rotary blade at the cutting position and the exchange position, and the rotary blade becomes non-rotatable when positioned at the exchange position. Is effective.

  In the sewing machine workpiece cutting device according to the present invention, the connecting means can move from the rotary blade cutting position to the rotary blade replacement position, and further from the rotary blade replacement position to the rotary blade standby position. The movable frame is rotatably connected to the fixed frame. The sewing machine cutting apparatus for a sewing machine according to the present invention can perform a cutting operation of a sewing product at a cutting position of the rotary blade, and can easily and easily replace the rotary blade at the rotary blade replacement position. There is an effect that it is possible to perform the sewing work without disturbing the presence of the rotary blade at the standby position.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall front view showing an embodiment of a sewing machine cutting device for a sewing machine according to the present invention. It is the top view which looked at the to-be-sewn material cutting device of the sewing machine of FIG. 1 from the top. Fig. 2 is a side view of the sewing machine cutting device of the sewing machine shown in Fig. 1 as viewed from the side. FIG. 4 is a side view of the sewing machine cutting device of the sewing machine shown in FIG. 3 viewed from the back side. FIG. 4 is a side view of FIG. 3 in which a part of the sewing machine is omitted. FIG. 4 is a side view for explaining the movement of the sewing machine cutting device for the sewing machine of FIG. 3. FIG. 7 is a side view of the sewing machine cutting device of the sewing machine shown in FIG. 6 viewed from the back side. It is a top view explaining the motion of the to-be-sewn material cutting device of the sewing machine of FIG. It is a top view explaining the motion of the to-be-sewn material cutting device of the sewing machine of FIG. FIG. 10 is a plan view illustrating the movement of the sewing machine cutting device of the sewing machine of FIG. 9. FIG. 10 is a rear view of the sewing machine cutting device of the sewing machine shown in FIG.

  The overall configuration of the sewing machine cutting device according to the present invention will be described. As shown in FIGS. 1 to 3, the sewing machine workpiece cutting device 21 includes a rotary blade 61 that cuts the sewing product on the bed portion 2 of the sewing machine 1. The sewing machine cutting device 21 includes a fixed frame 22 fixedly attached to the sewing machine body 10 and a movable frame 51 attached to the fixed frame 22 via a connecting means 41. The movable frame 51 includes a transmission shaft 55 provided on one side thereof, a rotation shaft 56 provided on the other side thereof, transmission means 57 for transmitting the rotation of the transmission shaft 55 to the rotation shaft 56, and rotation. And the rotary blade 61 fixed to the shaft 56.

  The fixed frame 22 is provided with a drive shaft 32 that is driven by the drive means 31 and a power transmission unit 80 that transmits the power of the drive shaft 32 to the transmission shaft 55. The connecting means 41 is configured so that the surface of the rotary blade 61 is substantially orthogonal to the longitudinal direction of the bed portion 2 from the cutting position (see FIG. 2) of the rotary blade 61 where the surface of the rotary blade 61 faces the longitudinal direction of the bed portion 2. A movable frame 51 is rotatably connected to the fixed frame 22 so that the movable blade 51 can be moved to an exchange position (see FIG. 8) of the rotary blade 61 inclined in the direction.

  When the driving means 31 is operated, the sewing machine workpiece cutting device 21 drives the driving shaft 32 on the fixed frame 22 side, and the power of the driving shaft 32 is transmitted through the power transmission unit 80 to the transmission shaft on the movable frame 51 side. The transmission shaft 55 rotates. When the transmission shaft 55 rotates, the rotation shaft 56 is rotated by the transmission means 57, and the rotary blade 61 fixed to the rotation shaft 56 also rotates. The rotary blade 61 cuts the workpiece on the bed portion 2 in cooperation with the fixed blade 64 provided on the movable frame 51 or the fixed blade formed on the bed portion 2 side of the sewing machine 1. When the drive unit 31 is stopped, the rotation of the transmission shaft 55, the rotary shaft 56, and the rotary blade 61 stops. The rotary blade 61 is located in the vicinity of the sewing needle 19, and the surface of the rotary blade 61 faces the direction side (longitudinal direction side of the bed portion 2) substantially orthogonal to the sewing direction of the sewing needle 19. The rotary blade 61 at the cutting position has the surface of the rotary blade 61 facing the sewing needle 19 side, and even if it is extracted from the rotary shaft 56 and removed, the surface of the rotary blade 61 remains the sewing needle 19, the presser foot 16, It cannot contact with the upper feed 18 or the like and cannot be removed from the rotary shaft 56.

  When the movable frame 51 is rotated with respect to the fixed frame 22 by the connecting means 41, the sewing machine cutting device 21 of the sewing machine moves the rotary blade 61 from the cutting position to the replacement position, and rotates as shown in FIG. The surface of the blade 61 is inclined toward the direction side substantially orthogonal to the longitudinal direction of the bed portion 2. The rotary blade 61 in the replacement position is separated from the sewing needle 19, the surface of the rotary blade 61 faces the operator side, and there is a possibility that the rotary needle 61 may come into contact with the surface of the rotary blade 61, the presser foot 16, Since there is no upper feed 18 or the like, it can be easily extracted and removed from the rotating shaft 56 without contacting anywhere. In this way, the sewing machine cutting device 21 of the sewing machine can move the rotary blade 61 from the cutting position to the replacement position, can secure a replacement space for the rotary blade 61, and anyone can easily replace the rotary blade 61. It can be carried out.

  The sewing machine cutting device 21 of the sewing machine is a connecting body rotatably attached to the fixed frame 22 so that the connecting means 41 rotates in a direction substantially parallel to the bed portion 2. One side of the movable frame 51 is rotatably attached to the connection body 41, and the rotary blade 61 on the other side of the movable frame 51 is configured to move in the vertical direction.

  Since the surface of the rotary blade 61 faces the longitudinal direction side (sewing needle 19 side) of the bed portion 2 at the cutting position of the rotary blade 61, the sewing machine workpiece cutting device 21 has the rotary blade 61 to the rotary blade 61. Even if it is attempted to remove and remove, the surface of the rotary blade 61 contacts the sewing needle 19 and is difficult to remove from the rotary shaft 56. As shown in FIGS. 6 and 7, the sewing machine cutting device 21 of the sewing machine rotates the movable frame 51 with respect to the coupling body 41 and moves the rotary blade 61 on the other side of the movable frame 51 upward to move the sewing machine. The rotary blade 61 is separated from the needle 19. Next, as shown in FIG. 8, when the coupling body 41 is rotated with respect to the fixed frame 22, the rotary blade 61 is separated from the sewing needle 19 in the horizontal direction, and the surface of the rotary blade 61 is the bed portion 2. It is inclined to the direction side substantially orthogonal to the longitudinal direction.

  In this manner, the surface of the rotary blade 61 is away from the sewing needle 19 and faces the operator, and the parts of the sewing machine 1 such as the sewing needle 19, the presser foot 16 and the upper feed 18 that are in contact with the surface of the rotary blade 61 are located. Since it does not exist, the rotary blade 61 can be easily extracted from the rotary shaft 56 and removed without contacting anywhere. In this manner, the sewing machine cutting device 21 of the sewing machine can safely move the rotary blade 61 from the cutting position to the replacement position without difficulty.

  As shown in FIGS. 1 and 10, the sewing machine workpiece cutting device 21 has a second connection in which the power transmission portion 80 is flexibly connected to a first connection shaft 81 and a first connection shaft 81. It consists of a shaft 86. The first connecting shaft 81 is connected to the drive shaft 32, and the second connecting shaft 86 is connected to the transmission shaft 55. The bent portions 84 of the first connecting shaft 81 and the second connecting shaft 86 are configured to substantially coincide with the rotation center 46 of the connecting means 41. In the sewing machine cutting device 21 of the sewing machine, the rotation center 46 of the connecting means 41 and the bent portion 84 of the power transmission unit 80 are substantially coincident with each other. It bends smoothly and has little burden on the power transmission unit 80 and is not easily broken.

  As shown in FIG. 1, the sewing machine cutting device 21 of the sewing machine is provided with switch means 75 for turning on / off the driving means 31 for driving the rotary blade 61 in the connecting means 41. The switch means 75 is turned on when the rotary blade 61 is in the cutting position, and is turned off when the rotary blade 61 is in the non-cutting position. As described above, in the sewing machine workpiece cutting device 21, the switch means 75 is turned on and the rotary blade 61 rotates at the cutting position, but the rotary blade 61 does not rotate at the non-cutting position. Can be exchanged.

  As shown in FIGS. 3 and 4, the sewing machine cutting device 21 of the sewing machine positions, on the connecting means 41, the first positioning means 71 that positions the rotary blade 61 at the cutting position, and the rotary blade 61 at the replacement position. It has the 2nd positioning means 72 and the switch means 75 which turns on / off the drive means 31 which drives the rotary blade 61. FIG. The switch means 75 is provided in the first positioning means 71, and is turned on when the first positioning means 71 positions the rotary blade 61, and is turned off when the first positioning means 71 does not position the rotary blade 61. It is comprised so that it may become.

  When the rotary blade 61 is positioned by the first positioning means 71 at the cutting position, the switch means 75 is turned on, and when the drive means 31 is operated, the rotary blade 61 rotates and the sewing machine cutting device 21 of the sewing machine rotates. Cut things. When the driving means 31 is stopped, the rotation of the rotary blade 61 stops. When the positioning of the first positioning means 71 is released, the switch means 75 is turned off, and the rotary blade 61 does not rotate even if the drive means 31 is to be operated. In the sewing machine cutting device 21 of the sewing machine, when the movable frame 51 is rotated with respect to the fixed frame 22 by the connecting means 41, the rotary blade 61 moves from the cutting position to the replacement position.

  As shown in FIG. 6, in the sewing machine cutting device 21 of the sewing machine, even if the rotary blade 61 is positioned by the second positioning means 72 at the replacement position, the switch means 75 is in the OFF state, and the rotary blade 61 cannot rotate. Therefore, the rotary blade 61 can be exchanged safely. Further, since the rotary blade 61 is positioned, it is stable and can be easily and easily exchanged. Thus, the sewing machine cutting device 21 of the sewing machine can position the rotary blade 61 at the cutting position and the exchange position, and when the rotary blade 61 is positioned at the exchange position, the rotary blade 61 becomes non-rotatable. high.

  In the sewing machine cutting device 21 of the sewing machine, the connecting means 41 can move from the cutting position of the rotary blade 61 (see FIG. 2) to the replacement position of the rotary blade 61 (see FIG. 8). The movable frame 51 is pivotably connected to the fixed frame 22 so that the movable frame 51 can be moved from the standby position to the standby position of the rotary blade 61 (see FIG. 9). The sewing machine cutting device 21 of the sewing machine can perform the cutting operation of the sewing product at the cutting position of the rotary blade 61, and can easily and easily replace the rotary blade 61 at the replacement position of the rotary blade 61. In the standby position, the sewing operation can be performed without the presence of the rotary blade 61 being in the way.

  Furthermore, a sewing machine cutting apparatus for a sewing machine will be described in detail. The general configuration of a general sewing machine will be described with reference to FIGS. In the sewing machine 1, a sewing machine body 10 is placed on a table 2 a of the bed 2, and a sewing machine driving pedal is attached to the lower part of the bed 2. Further, a needle bar 12 is attached to the lower portion of the sewing machine head 11 of the sewing machine body 10 so as to be vertically movable. A sewing needle 19 is attached to the lower end of the needle bar 12. A presser bar 15 is disposed vertically on the side of the needle bar 12, and a presser foot 16 is attached to the tip of the presser bar 15.

  An upper feed bar 17 is attached to the side of the presser bar 15, and an upper feed 18 is fixed to the upper feed bar 17. The needle bar 12 and the upper feed bar 17 are respectively disposed on the sewing machine head 11 so as to be movable up and down and swingable. The presser bar 15 is arranged on the sewing head 11 so as to be movable up and down. At the position of the table 2a of the bed portion 2 directly below the needle bar 12, a needle plate is disposed along the moving surface of the sewing object. Further, a lower feed and a rotary hook are attached to the inside of the bed portion 2 below the needle plate. The sewing machine 1 performs a main sewing operation on a material to be sewn such as cloth or leather by a sewing needle 19 attached to a needle bar 12 and the rotary hook.

  As shown in FIG. 1, a cutting device 21 is attached to a position on the front side of the sewing machine body 10 (on the side opposite to the operator's work position). The cutting device 21 is configured to cut a material to be sewn such as cloth or leather in conjunction with or independently of the sewing operation by the sewing needle 19 and the rotary hook. The cutting device 21 includes a fixed frame 22 that is fixedly attached to the front surface of the sewing machine main body 10 with screws or the like, and a movable frame 51 that is attached to the fixed frame 22 via a connecting means 41. In the present embodiment, the fixed frame 22 is fixedly attached to the actuator 35 provided on the front side of the sewing machine body 10 with screws or the like.

  As shown in FIGS. 1 and 2, the fixed frame 22 includes a mounting plate 23 that is fixed to the front side of the sewing machine body 10 with screws and the like, a fixing plate 25 that is fixed to the mounting plate 23 with screws and the like, and a fixing plate 25. The board 27 is fixed to the board 27 by screws or the like, and the motor mounting plate 28 is provided integrally with the board 27. The mounting plate 23 is fixed substantially perpendicularly to the longitudinal direction of the sewing machine body 10 by screws 24 and 24. The fixing plate 25 has a connecting piece 26 integrally fixed to the front portion, and the connecting piece 26 is joined to the lower surface of the mounting plate 23 and screwed to be fixed substantially horizontally.

  The substrate 27 is joined to the lower surface of the fixed plate 25 and screwed, and is fixed to the fixed plate 25 substantially horizontally. A motor mounting plate 28 is integrally provided on the lower surface of the substrate 27 in a direction substantially perpendicular to the substrate 27. A drive motor 31 is fixed to the motor mounting plate 28 with screws or the like. The drive shaft 32 of the drive motor 31 protrudes forward from the motor mounting plate 28 in a substantially horizontal state. The drive shaft 32 is substantially parallel to the longitudinal direction of the sewing machine body 10 and protrudes forward (to the right in FIG. 1) on the sewing needle 19 side.

  The board 27 is provided with connecting means 41. The connecting means 41 includes a rotating plate 42 that is rotatably attached to the substrate 27 by a central shaft 46, a rear block 43 provided behind the rotating plate 42, and a front of the rotating plate 42. A front block 45 and an inclined mounting plate 48 are provided. The rear block 43 is provided with positioning bolts 44. As shown in FIG. 9, the positioning bolt 44 is screwed into the first positioning screw hole 29 or the second positioning screw hole 30 formed in the substrate 27. The first positioning screw hole 29 and the second positioning screw hole 30 are arranged on a circumference around the central axis 46.

  As shown in FIG. 1, the front block 45 is inclined at the front surface 47. The front surface 47 of the front block 45 is inclined so that the thickness of the front block 45 decreases from the lower edge toward the upper edge, the lower end edge protrudes forward, and the upper end edge retracts backward. The inclined mounting plate 48 is joined and fixed to the front surface 47 of the front block 45 with screws. As with the front surface 47 of the front block 45, the inclined mounting plate 48 is inclined such that the lower part protrudes forward and the upper part retracts backward.

  As shown in FIG. 2, the movable frame 51 is provided with a winding transmission means. The movable frame 51 is formed by a front side plate 52, a rear side plate 53, and a fixed shaft that connects and fixes the front side plate 52 and the rear side plate 53. The movable frame 51 has a rotating shaft 56 rotatably attached to the lower portion and a transmission shaft 55 rotatably attached to the upper portion. A belt 57 is wound around the upper transmission shaft 55 and the lower rotation shaft 56, and the rotation of the transmission shaft 55 is transmitted to the rotation shaft 56 via the belt 57.

  Thus, the transmission shaft 55, the rotation shaft 56, and the belt 57 constitute the winding transmission means. However, the pulley is fixed to the transmission shaft 55 and the rotation shaft 56, and the belt is wound around the pair of pulleys. Of course, it may be a hanging transmission means. The transmission means for transmitting the rotation of the transmission shaft 55 to the rotary shaft 56 is not limited to the winding transmission means, and various technical means such as a gear group may be adopted as a matter of course. . As shown in FIG. 1, the rotating shaft 56 protrudes from the front plate 52, and a rotating blade 61 is fixedly attached to the protruding portion of the rotating shaft 56. As shown in FIG. 3, a cover body 62 that covers the upper part of the rotary blade 61 is attached to the front side plate 52 with screws or the like. A fixed blade 64 that cuts the workpiece on the bed 2 in cooperation with the rotary blade 61 is attached to the cover body 62.

  As shown in FIG. 1, the movable frame 51 is rotatably attached to the inclined mounting plate 48. An upper portion of the rear side plate 53 is extended to form a connection plate 58. As shown in FIG. 3, the connecting plate 58 is rotatably connected to the inclined mounting plate 48 via a connecting screw 63 and is in sliding contact with the inclined mounting plate 48. An arcuate guide groove 49 that guides the connecting screw 63 is formed in the inclined mounting plate 48. The guide groove 49 is formed in an arc shape with the transmission shaft 55 as the center. A block piece 65 is attached to the connecting plate 58 with screws 67 or the like. The block piece 65 is provided with positioning bolts 66. As shown in FIG. 5, the positioning bolt 66 is screwed into the first positioning screw hole 71 or the second positioning screw hole 72 formed in the inclined mounting plate 48. The first positioning screw hole 71 and the second positioning screw hole 72 are arranged on a circumference around the transmission shaft 55.

  As shown in FIG. 1, when the movable frame 51 is positioned by screwing the positioning bolt 66 into the first positioning screw hole 71, the rotary blade 61 cuts the sewing product placed on the bed portion 2. It is arranged at a position where it is possible. When the movable frame 51 is positioned by screwing the positioning bolt 66 into the second positioning screw hole 72, as shown in FIGS. 6 and 7, the rotary blade 61 moves upward and leaves the workpiece. As shown in FIG. 1, the inclined mounting plate 48 is provided with a switch 75 that is turned on when pressed by the tip of the positioning bolt 66 when the positioning bolt 66 is screwed into the first positioning screw hole 71.

  As shown in FIGS. 1 and 10, the transmission shaft 55 of the movable frame 51 and the drive shaft 32 of the drive motor 31 are connected by a universal joint 80. The universal joint 80 includes a first connecting shaft 81 and a second connecting shaft 86 that is flexibly connected to the first connecting shaft 81. The first connecting shaft 81 includes a shaft main body portion 82 to which the drive shaft 32 of the drive motor 31 is attached on one side, a substantially U-shaped bearing portion 83 formed on the other side of the shaft main body portion 82, and an inner portion of the bearing portion 83. And a frame body 85 rotatably attached by a first support shaft 84.

  The second connecting shaft 86 includes a shaft main body portion 87 to which the transmission shaft 55 is attached on one side, and a substantially U-shaped bearing portion 88 formed on the other side of the shaft main body portion 87. The frame body 85 is rotatably connected to the second support shaft 89. The bent portion of the universal joint 80, that is, the position of the first support shaft 84, and the rotation center of the connecting means 41, that is, the position of the central shaft 46 substantially coincide with each other.

  In the present embodiment, the fixed blade 64 that cuts the workpiece by cooperation with the rotary blade 61 is provided on the cover body 62, but the needle that the fixed blade is provided on the bed portion 2 of the sewing machine 1. It may be formed on a plate. In this case, the cutting point constituted by the rotary blade 61 and the fixed blade can be arranged at a position that is a fixed distance from the needle drop point of the sewing needle 19 on the worker side of the upper feed 18 when viewed from the worker side. Composed. In this manner, the workpiece cutting device 21 is attached to the sewing machine body 10. Although not shown, the sewing machine 1 is provided with a power switch, a sewing machine driving pedal, and a sewing machine driving motor controller.

  The above configuration can be used as follows. The sewing product cutting device 21 attached to the sewing machine body 10 can move the rotary blade 61 to a cutting position, an exchange position, and a standby position. As shown in FIGS. 1 to 3, the cutting position of the rotary blade 61 is such that the positioning bolt 44 is screwed into the first positioning screw hole 29 formed in the substrate 27, and the positioning bolt 66 is formed in the inclined mounting plate 48. This is the position screwed into the first positioning screw hole 71. Further, the connecting screw 63 is screwed at the position of the upper end portion of the guide groove 49.

  As shown in FIGS. 6 to 8, the exchange position of the rotary blade 61 is such that the movable frame 51 rotates about the transmission shaft 55 and the positioning bolt 44 is screwed into the second positioning screw hole 30 formed in the substrate 27. And the positioning bolt 66 is screwed into the second positioning screw hole 72 formed in the inclined mounting plate 48. Further, the connecting screw 63 is screwed at the position of the lower end portion of the guide groove 49. As shown in FIGS. 9 to 11, the standby position of the rotary blade 61 is such that the positioning bolt 44 is not screwed away from the substrate 27, the rotating plate 42 is in a free state, and the positioning bolt 66 is attached to the inclined mounting plate 48. This is the position screwed into the formed second positioning screw hole 72.

  At the cutting position of the rotary blade 61 described above, the rotating plate 42 is substantially parallel to the longitudinal direction of the bed portion 2 as shown in FIG. As shown in FIG. 1, since the movable frame 51 is joined to the inclined mounting plate 48, the movable frame 51 is inclined toward the sewing needle 19 side, and the rotary blade 61 is inclined obliquely. Thus, the rotary blade 61 is positioned by the positioning bolts 44 and 66 at this cutting position.

  The inclined mounting plate 48 is provided with a switch 75 at the position of the first positioning screw hole 71. When the positioning bolt 66 is screwed into the first positioning screw hole 71, the switch 75 is pressed by the tip of the positioning bolt 66 and is in an on state. The rotary blade 61 is located in the vicinity of the sewing needle 19, and the surface of the rotary blade 61 faces the direction side (longitudinal direction side of the bed portion) substantially orthogonal to the sewing direction of the sewing needle 19. The rotary blade 61 in the cutting position has the surface of the rotary blade 61 facing the sewing needle 19 side, and even if it is extracted from the rotary shaft 56 and removed, the surface of the rotary blade 61 remains the sewing needle 19, the cloth presser 16 and It cannot contact with the upper feed 18 and cannot be removed from the rotary shaft 56.

  When the sewing machine driving pedal is operated in a state where the rotary blade 61 is positioned at the cutting position, the sewing machine 1 is driven by the sewing machine driving motor controller, and sewing work is started on a sewing product (not shown). Since the switch 75 is turned on, at the same time, electric power flows from the sewing machine driving motor controller to the driving motor 31 and the driving motor 31 is rotationally driven. The rotation of the drive shaft 32 of the drive motor 31 is transmitted to the universal joint 80, the transmission shaft 55, the belt 57, and the rotation shaft 56, and the rotary blade 61 fixed to the rotation shaft 56 rotates. As a result, the rotary blade 61 rotates and rotates at the same time as the sewing machine 1 is driven, and the workpiece is cut simultaneously with sewing at the cutting point in cooperation with the fixed blade 64.

  In order to replace the rotary blade 61, the connecting screw 63 is loosened, the positioning bolt 66 is removed from the first positioning screw hole 71 formed in the inclined mounting plate 48, and the transmission shaft 55 is centered as shown in FIGS. The lower part of the movable frame 51 is rotated upward to separate the rotary blade 61 obliquely upward from the workpiece. Next, the connecting screw 63 is screwed at the position of the lower end of the guide groove 49, and the positioning bolt 66 Is positioned by screwing into a second positioning screw hole 72 formed in the inclined mounting plate 48. As shown in FIG. 8, when the positioning bolt 44 is removed from the first positioning screw hole 29 formed in the substrate 27 and the rotating plate 42 is tilted with respect to the longitudinal direction of the bed portion 2, the rotating plate 42 is moved. The movable frame 51 fixed to the center rotates about the central axis 46, and the surface of the rotary blade 61 faces in a direction inclined with respect to the longitudinal direction of the bed portion 2. Next, the positioning bolt 44 is screwed into the second positioning screw hole 30 formed in the substrate 27 and positioned. In this way, the movable frame 51 is fixed to the fixed frame 22.

  The replacement position of the rotary blade 61 is such that the positioning bolt 66 is screwed into the second positioning screw hole 72 formed in the inclined mounting plate 48, and the positioning bolt 44 is in the second positioning screw hole 30 formed in the substrate 27. The rotary blade 61 in this replacement position, which is a position positioned by screwing, is separated from the sewing needle 19, the cloth presser 16 and the upper feed 18, and there is no portion of the sewing machine 1 that contacts the surface of the rotary blade 61. Therefore, it can be easily extracted and removed from the rotating shaft 56 without touching anywhere. Since the positioning bolt 66 is not screwed into the first positioning screw hole 71 in the rotary blade 61, the switch 75 is in an OFF state, and the drive motor 31 is not driven and does not rotate. Therefore, the rotary blade 61 can be safely removed. When the rotary blade 61 is in the replacement position, the sewing machine 1 can perform a sewing operation. However, since the position where the rotary blade 61 can be easily replaced is the position immediately above the bed portion 2, it interferes with the sewing work. Therefore, the rotary blade 61 can be moved to a standby position that does not interfere with the sewing work.

  The standby position of the rotary blade 61 is such that the positioning bolts 44 are formed in the second positioning screw holes 72 formed in the inclined mounting plate 48 and the positioning bolts 44 are formed on the substrate 27 in the second positioning screw. 9 is a position where the rotating plate 42 is greatly tilted with respect to the longitudinal direction of the bed portion 2, and the movable frame 51 fixed to the rotating plate 42 is at the center as shown in FIGS. The position rotates around the shaft 46 and is substantially parallel to the longitudinal direction of the sewing machine body 10.

  As shown in FIG. 11, the rotary blade 61 in the standby position is separated from the sewing needle 19, the cloth presser 16, and the upper feed 18, and is positioned above the bed portion 2. Don't be. Since the positioning bolt 66 is not screwed into the first positioning screw hole 71, the rotary blade 61 is in the OFF state, the current does not flow through the drive motor 31, and it does not drive and does not rotate. Therefore, the sewing work can be performed safely.

  While the present invention has been described above with reference to the illustrated embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea of the present invention. For example, in the above-described embodiment, the belt 57 is used as the conduction means for driving the rotary blade 61. However, the belt 57 may be used instead of the belt 57 for driving.

  Since the workpiece cutting device 21 can set and arrange the cutting position of the rotary blade 61 in the vicinity of the sewing needle 19, any shape of the workpiece to be sewn can be substantially simultaneously with or independently while maintaining the sewing quality. The sewing product can be cut from an arbitrary position with a uniform width from the sewing line, and the quality and productivity of the sewing product can be improved. Further, the sewing product cutting device 21 is configured separately from the sewing machine main body 10, and can be added to an existing sewing machine later to provide a sewing machine with a sewing product cutting function, thereby reducing the cost of the sewing machine main body 10. Is possible. However, the workpiece cutting device 21 may be integrated in a form incorporated in the sewing machine body 10.

  The present invention can be mounted on a sewing machine, and can be widely used as a sewing product cutting device that cuts a sewing product substantially simultaneously with sewing or independently of sewing.

DESCRIPTION OF SYMBOLS 1 Sewing machine 2 Bed part 2a Table 10 Sewing machine main body 11 Sewing machine head 12 Needle bar 15 Presser bar 16 Work clamp 17 Upper feed bar 18 Upper feed 19 Sewing needle 21 Cutting device 22 Fixing frame 23 Mounting plate 24 Screw 25 Fixing plate 26 Connecting piece 27 Substrate 28 Motor mounting plate 29 First positioning screw hole 30 Second positioning screw hole 31 Drive motor (drive means)
32 Drive shaft 35 Actuator 41 Connecting means (connecting body)
42 Rotating Plate 43 Rear Block 44 Positioning Bolt 45 Front Block 46 Center Shaft 47 Front Side 48 Inclined Mounting Plate 49 Guide Groove 51 Movable Frame 52 Front Side Plate 53 Rear Side Plate 55 Transmission Shaft 56 Rotating Shaft 57 Belt (Transmission Means)
58 connecting plate 61 rotary blade 62 cover body 63 connecting screw 64 fixed blade 65 block piece 66 positioning bolt 67 screw 71 first positioning screw hole (first positioning means)
72 Second positioning screw hole (second positioning means)
75 switch (switch means)
80 Universal joint (power transmission part)
81 First connecting shaft 82 Shaft body portion 83 Bearing portion 84 First support shaft 85 Frame 86 Second connecting shaft 87 Shaft body portion 88 Bearing portion 89 Second support shaft

Claims (6)

A sewing machine cutting device having a rotary blade for cutting a sewing product on a bed portion of the sewing machine,
A fixed frame that is fixedly attached to the sewing machine body;
It consists of a movable frame attached to the fixed frame via connecting means,
The movable frame includes a transmission shaft provided on one side thereof, a rotation shaft provided on the other side thereof, transmission means for transmitting rotation of the transmission shaft to the rotation shaft, and the fixed to the rotation shaft. A rotating blade,
The fixed frame is provided with a drive shaft that is driven by drive means and a power transmission unit that transmits the power of the drive shaft to the transmission shaft,
The connecting means is provided from a cutting position of the rotary blade in which the surface of the rotary blade faces the longitudinal direction of the bed portion to an exchange position of the rotary blade in which the surface of the rotary blade is inclined in a direction substantially orthogonal to the longitudinal direction of the bed portion. A sewing machine cutting apparatus for a sewing machine, wherein a movable frame is rotatably connected to a fixed frame so as to be movable. The connecting means is a connecting body rotatably attached to a fixed frame so as to rotate in a direction substantially parallel to the bed portion,
The sewing machine according to claim 1, wherein one side of the movable frame is rotatably attached to the coupling body, and the rotary blade on the other side of the movable frame is configured to be movable in the vertical direction. Sewing material cutting device.   The power transmission unit includes a first coupling shaft and a second coupling shaft that is flexibly coupled to the first coupling shaft, the first coupling shaft being coupled to the drive shaft, and a second coupling shaft. 3. The sewing machine cutting apparatus according to claim 1, wherein the shaft is connected to the transmission shaft, and the bent portion substantially coincides with the rotation center of the connecting means. The connecting means is provided with a switch means for turning on and off a driving means for driving the rotary blade,
4. The sewing machine cutting apparatus according to claim 1, wherein the switch means is turned on when the rotary blade is in the cutting position and turned off when the rotary blade is in the non-cutting position. The connecting means includes a first positioning means for positioning the rotary blade at a cutting position, a second positioning means for positioning the rotary blade at an exchange position, and a switch means for turning on and off a driving means for driving the rotary blade; Have
The switch means is provided in the first positioning means, and is configured to turn on when the first positioning means positions the rotary blade, and to be turned off when the first positioning means does not position the rotary blade. The sewing machine cutting device for a sewing machine according to claim 1, 2 or 3, wherein   The connecting means rotatably connects the movable frame to the fixed frame so as to be able to move from the cutting position of the rotary blade to the replacement position of the rotary blade and further from the replacement position of the rotary blade to the standby position of the rotary blade. 6. The sewing machine cutting device for a sewing machine according to claim 1, wherein the sewing machine has a sewing machine.