JP2018130471A - Oil supply mechanism of sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil supply mechanism of a sewing machine capable of reducing replenishing frequency of a lubrication oil, and capable of surely lubricating a transmission mechanism.SOLUTION: A transmission mechanism 40 includes an upper side connection part 50, a lower side connection part 70 and a connecting rod 45. The upper side connection part 50 converts a rotating operation of an upper shaft into a reciprocating vertical operation of the connecting rod 45. The lower side connection part 70 converts the reciprocating vertical operation of the connecting rod 45 into a reciprocating rotation operation of a lower shaft 36. The transmission mechanism 40, a supply mechanism 110 and an oil storage part 150A are arranged in a partition part 15 for partitioning them from other mechanisms in a sewing machine 1. A flip-up member 120 is connected to the lower side connection part 70, and reciprocates and rotates between an advance position and an upper position being interlocked with the vertical movement of the connecting rod 45. The flip-up member 120 scoops a lubrication oil in the oil storage part 150A at the advance position, and in the process of moving to the upper position, flips up the lubrication oil into the partition part 15 to lubricate the transmission mechanism 40. The oil storage part 150A stores the lubrication oil which drips downward in the partition part 15, and circulates the lubrication oil.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an oil supply mechanism of a sewing machine that supplies lubricating oil to an oil supply object.

  There is a sewing machine that converts the rotational motion of the upper shaft into a reciprocating motion and transmits it, and rotates the lower shaft. For example, the sewing machine described in Patent Document 1 includes a crank mechanism. A shaft portion of a crank portion provided on the upper shaft is rotatably connected to an upper ring portion of the crank rod. The crank rod is provided with a grease tank. When the sewing machine is driven, the grease in the grease tank oozes out to the upper ring portion through the supply path and lubricates the crank portion.

JP 2009-213695 A

  However, the grease in the grease tank is reduced by consumption accompanying the operation of the sewing machine. In this case, the user needs to replenish the grease tank with grease. If the user fails to replenish the grease, the grease may be depleted and the crank portion may be seized at the shaft portion, possibly causing damage to the crank rod.

  An object of the present invention is to provide an oil supply mechanism for a sewing machine that can reduce the replenishment frequency of lubricating oil and can reliably lubricate a transmission mechanism.

  According to one aspect of the present invention, there is provided a transmission mechanism that is connected to an upper shaft that is rotated by driving of a motor and a lower shaft that is positioned below the upper shaft, and that transmits a driving force of the upper shaft to the lower shaft. An oil supply mechanism for a sewing machine, provided below the transmission mechanism of the sewing machine, comprising: an oil storage part for storing lubricating oil; and a supply mechanism for supplying the transmission mechanism with the lubricating oil stored in the oil storage part. The transmission mechanism, the oil storage portion, and the supply mechanism are disposed in a partition portion that partitions an arrangement region inside the sewing machine from another mechanism, and the oil storage portion is disposed in the partition portion and the supply mechanism is connected to the transmission mechanism. The transmission mechanism connects the transmission member extending in the vertical direction and the upper shaft to the upper end portion of the transmission member, and rotates the upper shaft. Convert to reciprocating up and down movement of the transmission member A side connection portion, and a lower connection portion that connects a lower end portion of the transmission member to the lower shaft and converts a reciprocating vertical movement of the transmission member into a reciprocating rotation operation of the lower shaft, and the supply mechanism includes: , Provided above the oil reservoir, connected to the transmission mechanism, interlocked with the reciprocating up and down movement of the transmission member, and an entry position for entering the oil reservoir and an upper position above the oil reservoir A jumping member having a moving part that reciprocates between positions; and when the jumping member moves to the entry position, the jumping member immerses the moving part in lubricating oil and moves from the entry position to the upper position. Thus, a lubricating oil supply mechanism for a sewing machine is provided, in which the lubricating oil adhering to the moving part is splashed into the partition part.

  The moving part of the splash member reciprocates with a driving force by which the transmission mechanism transmits the rotation of the upper shaft to the lower shaft, and splashes the lubricating oil in the oil reservoir into the partition. Therefore, the splash member jumps up the lubricating oil in accordance with the rotation of the upper shaft. That is, if the upper shaft rotates at a high speed, the jumping member operates at a high speed and splashes the lubricating oil, so that the lubricating oil can be splashed to a height that can sufficiently lubricate the transmission mechanism. Therefore, the supply mechanism can reliably lubricate the transmission mechanism. The lubricating oil that has lubricated the transmission mechanism moves downward in the partition and returns to the oil reservoir. That is, since the oil supply mechanism can circulate the lubricating oil in the partition portion, the need for replenishing the lubricating oil can be greatly reduced.

  In this aspect, the supply mechanism is configured such that one end of the supply mechanism can contact the upper connecting portion, and extends downward from the one end to the inside of the partition, and is disposed below the one end in the partition. There may be provided a wick member that feeds lubricating oil adhering to the portion to the upper connecting portion by wick fueling. When the upper shaft rotates at a low speed, the splashing member operates at a low speed, so that there is a possibility that the lubricating oil cannot be splashed up to a height that lubricates the transmission mechanism. The supply mechanism includes a wick member that can come into contact with the upper connecting portion, and supplies lubricating oil to the transmission mechanism by wick fuel supply using the capillary action of the wick member. Since the wick member supplies lubricating oil to the upper connecting portion, the transmission mechanism can be sufficiently lubricated even when the splashing member cannot splash the lubricating oil to a sufficient height by the reciprocating movement of the moving portion.

  In this aspect, the other end portion of the wick member may be disposed in the partition portion below the upper connection portion and above the spring member. The wick fuel supply has a larger supply amount as the distance for feeding the lubricant is shorter. An oil supply mechanism arrange | positions the other end part of a wick member above a splash member. Therefore, since the distance which feeds lubricating oil can be shortened, the supply mechanism can lubricate a transmission mechanism reliably.

  In this aspect, the other end of the wick member may be disposed in contact with the side surface of the transmission member. The lubricating oil that has lubricated the upper shaft and the upper coupling portion of the transmission mechanism flows downward along the side surface of the transmission member whose upper end portion is coupled to the upper coupling portion. Therefore, the supply mechanism can maintain the other end portion of the wick member in the lubricating oil on the side surface of the transmission member, and can stably supply the lubricating oil to the upper connecting portion.

  In this aspect, the supply mechanism may include a storage mechanism that stores lubricating oil above the splash member, and the other end portion of the wick member may be disposed in the storage mechanism. The storage mechanism is provided above the splash member, and the other end of the wick member is disposed. Part of the lubricating oil splashed by the spring member stays in the storage mechanism while returning to the oil storage section. Therefore, the supply mechanism can maintain the other end portion of the wick member in the lubricating oil by the storage mechanism, and can stably supply the lubricating oil to the upper shaft and the upper coupling portion of the transmission mechanism. .

  In this aspect, the upper connecting portion is provided integrally with the upper shaft and includes a crank shaft that is eccentric with respect to the axis of the upper shaft, and the crank shaft is capable of rotating the upper end portion of the transmission member. You may support. The crankshaft is provided integrally with the upper shaft, and rotatably supports the upper end portion of the transmission member. Since the upper end portion of the transmission member only needs to have a size corresponding to the size of the diameter of the crankshaft, the configuration of the connection portion (upper coupling portion) between the upper shaft and the transmission member can be reduced. Therefore, the sewing machine can reduce the space in the partition part. Therefore, the region to which the splashed lubricating oil is applied can be reduced, so that the supply mechanism can stably supply the lubricating oil to the upper shaft and the upper coupling portion of the transmission mechanism.

  In this aspect, the upper connecting portion is formed in a disk shape, and includes an eccentric ring having a fixing hole for inserting and fixing the upper shaft at a position eccentric with respect to the shaft center, and the eccentric wheel includes the transmission The upper end of the member may be rotatably supported. The eccentric wheel has a fixing hole, and the outer shaft has a relatively large outer diameter because the upper shaft having an axis that is eccentric with respect to the shaft center is inserted into the fixing hole. Therefore, since the opposing area of the outer peripheral surface of the eccentric wheel and the inner peripheral surface of the upper end portion is large, the oil supply mechanism needs to supply a large amount of lubricating oil. The supply mechanism can stably supply a large amount of lubricating oil to the upper shaft and the upper coupling portion of the transmission mechanism by splashing a large amount of lubricating oil from the oil storage portion at a time by the splash member.

  In this aspect, the lower connecting portion includes a swing gear that meshes with a gear tooth provided on the lower shaft, a gear shaft that is fixed to the swing gear and serves as a rotation center of the swing gear, A connecting shaft extending in parallel with the gear shaft and rotatably supporting the lower end of the transmission member; and a swinging member extending perpendicular to the connecting shaft and connected to the gear shaft and the connecting shaft. May be. In the supply mechanism, the lubricating oil that has jumped into the partition portion moves downward in the partition portion, and the lubricating oil reaches a portion of the transmission mechanism that has a structure in which the gear shaft rotates together with the swing gear. Therefore, the oil supply mechanism can supply the lubricating oil stably.

  In this aspect, the lower connecting portion bears a swinging gear meshing with a gear tooth provided on the lower shaft, a rotation center of the swinging gear, and rotatably supports the swinging gear. A gear shaft, a connecting shaft that extends parallel to the gear shaft and rotatably supports the lower end of the transmission member, and extends orthogonally to the connecting shaft, and is connected to the swing gear and the connecting shaft. And a rocking member. The supply mechanism is a process in which the lubricating oil splashed up in the partitioning part moves downward in the partitioning part, and the lubricating oil is also applied to a part of the transmission mechanism that has a structure that supports the rotation of the swinging gear. Reach. Therefore, the oil supply mechanism can supply the lubricating oil stably.

  In this aspect, the jumping member includes a fixed portion that is connected to the moving portion and fixed to the swinging gear, and the moving portion is moved upward and downward with the reciprocating rotation of the swinging gear. You may reciprocate between positions. By fixing the fixed portion to the swinging gear that reciprocally rotates around the gear shaft, the moving portion of the spring member surely moves back and forth between the entry position and the upper position. Therefore, the oil supply mechanism can splash the lubricating oil in the oil reservoir into the partition by the spring member.

  In this aspect, the spring member includes a fixing portion that is connected to the moving portion and is fixed to the lower end portion of the transmission member. You may reciprocate between the upper positions. By fixing the fixing portion to the lower end portion of the transmission member that reciprocates up and down, the moving portion of the spring member surely reciprocates between the entry position and the upper position. Therefore, the oil supply mechanism can splash the lubricating oil in the oil reservoir into the partition by the spring member.

  In this aspect, the jumping member includes a fixed portion that is connected to the moving portion and is fixed to the gear shaft, and the moving portion is configured to perform the reciprocating rotation operation of the gear shaft with the entry position and the upper position. You may reciprocate between. By fixing the fixed portion to the reciprocatingly rotating gear shaft, the moving portion of the spring member surely reciprocates between the entry position and the upper position. Therefore, the oil supply mechanism can splash the lubricating oil in the oil reservoir into the partition by the spring member.

  In this aspect, the moving part of the spring member may have a scooping part for scooping lubricating oil stored in the oil storage part on the side opposite to the fixed part side. When the moving part moves to the entry position, the scooping part scoops up the lubricating oil in cooperation with the moving part, so that the splashing member can splash more lubricating oil into the partitioning part and stabilize the lubricating oil. Can be supplied.

  In this aspect, the spring member may be formed by integrally forming the moving portion and the fixed portion, and the scooping portion may be formed by folding an end portion on the opposite side to the fixed portion side upward. Good. The spring member can be formed at low cost by forming the plate material by bending it.

1 is a perspective view of a sewing machine 1. FIG. 2 is a right side view of the sewing machine 1. FIG. 2 is a perspective view of a drive mechanism 30 and an oil supply mechanism 100. FIG. FIG. 6 is an exploded perspective view of a lower connection part 70. FIG. 3 is a cross-sectional view of the sewing machine 1 viewed from the front along the line II in FIG. 2 when the spring member 120 is in the approach position. FIG. 3 is a cross-sectional view of the sewing machine 1 viewed from the front along the line II-II in FIG. 2. 3 is a perspective view of an oil container 150. FIG. 2 is a plan view of an oil container 150. FIG. FIG. 9 is a cross-sectional view of an oil container 150 viewed from the front along the line IV-IV in FIG. 8. FIG. 9 is a cross-sectional view of the oil container 150 viewed from the front along the line VV in FIG. 8. 3 is a perspective view from below of an oil container 150. FIG. 1 is a perspective view of a sewing machine 1 in a tilted state. It is sectional drawing which looked at the sewing machine 1 of the tilting state at the time of oil draining by the III-III line | wire of FIG. FIG. 3 is a cross-sectional view of the sewing machine 1 tilted during refueling as viewed from the front along the line III-III in FIG. 2. 3 is a perspective view of a spring member 120. FIG. FIG. 3 is a cross-sectional view of the sewing machine 1 viewed from the front along the line II in FIG. 2 when the spring member 120 is in the upper position. FIG. 9 is a cross-sectional view of the oil container 150 viewed from the front along the line IV-IV in FIG. 8 when the spring member 120 is in the upper position. FIG. 9 is a cross-sectional view of the oil container 150 viewed from the front along the line IV-IV in FIG. 8 when the spring member 120 is in the approach position. 4 is a perspective view of an upper connecting part 250. FIG. 7 is an exploded perspective view of a lower connecting portion 370. FIG. 5 is a cross-sectional view of a state in which a spring member 420 is fixed to a swing gear 471. FIG. FIG. 6 is a cross-sectional view of a state in which a spring member 520 is fixed to a lower ring portion 548 of a linkage 545 FIG. 6 is a perspective view of a state in which a core material 632 is wound around a continuous rod 645.

  An embodiment of the present invention will be described. In the following description, left, right, front, back, and top and bottom indicated by arrows in the figure are used.

  The overall structure of the sewing machine 1 will be described. As shown in FIGS. 1 and 2, the sewing machine 1 is a tacking sewing machine that forms tacking stitches on a cloth. The sewing machine 1 is provided on a sewing machine base 20 (see FIG. 13). The sewing machine 1 includes a bed portion 2, a pedestal column portion 3, and an arm portion 4. The bed portion 2 extends in the front-rear direction, and includes a half-turn hook 8 (see FIG. 3), a feed base (not shown), a cloth feed mechanism (not shown), and the like. The bed unit 2 includes a needle plate 9. The needle plate 9 has a needle hole (not shown) on the upper surface of the front end portion. The feed plate 11 is located on the needle plate 9 and is fixed to the feed base.

  The pedestal 3 extends upward from the rear side of the bed 2 and includes a sewing machine motor 21 (see FIG. 3) on the back wall. The arm portion 4 includes a top shaft 31 (see FIG. 3) that extends forward from the upper end of the pedestal column portion 3 substantially parallel to the bed portion 2 and is driven by a sewing machine motor 21 therein. The front end portion 5 of the arm portion 4 projects downward from other portions of the arm portion 4. The front end portion 5 supports the needle bar 6 so as to be movable up and down. The needle bar 6 extends downward from the lower end of the front end portion 5. The sewing needle 7 can be attached to and detached from the lower end of the needle bar 6 and is driven in the vertical direction by driving the upper shaft 31 together with the needle bar 6.

  The sewing machine 1 is provided with a presser foot device 10 at the top of the bed portion 2. The presser foot device 10 includes a presser foot 12. The presser foot 12 is positioned above the needle plate 9. The presser foot device 10 raises and lowers the presser foot 12 and presses the cloth as a sewing object from above. The presser foot device 10 is driven by a presser foot motor (not shown). The presser foot motor is provided inside the pedestal 3.

  The cloth feed mechanism includes an X feed motor 25 on the left side in the bed portion 2 and a Y feed motor 26 (see FIG. 6) on the left side in the pedestal portion 3. The cloth feed mechanism drives the X feed motor 25 and the Y feed motor 26 to move the cloth presser 10, the feed plate 11, and the feed base in the X direction (left and right direction) and the Y direction (front and back direction). The sewing machine 1 feeds the cloth in the X direction and the Y direction in accordance with the vertical movement of the sewing needle 7, and forms a tack seam on the cloth.

  During normal use, the sewing machine 1 is used in a standing state. The standing state is a state in which the pedestal column portion 3 stands perpendicular to the upper surface (horizontal plane) of the sewing machine base 20. During maintenance, the sewing machine 1 is tilted in the tilting direction. The tilted state is a state in which the pedestal 3 is tilted with respect to the upper surface (horizontal plane) of the sewing machine base 20. The tilting direction of the sewing machine 1 is leftward. When the sewing machine 1 is in a tilted state, the right surface side is tilted upward with the hinge portion 2A at the lower left portion of the bed portion 2 as an axis (see FIG. 12).

  The drive mechanism 30 of the sewing machine 1 will be described with reference to FIGS. The drive mechanism 30 includes a sewing machine motor 21, an upper shaft 31, a lower shaft 36, a transmission mechanism 40, a balance drive mechanism 80, a needle bar drive mechanism 85, and a shuttle drive mechanism 90.

  The upper shaft 31 extends in the front-rear direction within the arm portion 4. The rear end of the upper shaft 31 is connected to the output shaft of the sewing machine motor 21 via a joint 32. The sewing machine motor 21 rotates the upper shaft 31 about the axis A. The joint 32 is provided with a spring wheel 33 at the rear end. The spring wheel 33 stabilizes the rotation of the upper shaft 31.

  The balance driving mechanism 80 and the needle bar driving mechanism 85 are provided in the front end portion 5. The front end of the upper shaft 31 is connected to the balance drive mechanism 80 and the needle bar drive mechanism 85. The sewing machine motor 21 rotates the upper shaft 31 and transmits the driving force accompanying the rotation of the upper shaft 31 to the balance driving mechanism 80 and the needle bar driving mechanism 85. The balance drive mechanism 80 includes a balance 14. The balance drive mechanism 80 moves the balance 14 up and down as the upper shaft 31 rotates. Since the structure of the balance drive mechanism 80 is well known, description thereof is omitted. The needle bar drive mechanism 85 includes the needle bar 6. The needle bar drive mechanism 85 reciprocates the needle bar 6 and the sewing needle 7 up and down as the upper shaft 31 rotates. When the needle bar 6 is lowered, the lower end of the sewing needle 7 passes through the needle hole and reaches the upper part of the half-turn hook 8. A bobbin case (not shown) accommodates a bobbin (not shown) wound with a lower thread and is attached to the half-turn hook 8. The sewing needle 7 holds the upper thread. The half rotary hook 8 cooperates with the sewing needle 7 and entangles the upper thread and the lower thread. The balance 14 pulls the upper thread entangled with the lower thread onto the needle plate 9 to form a stitch on the cloth.

  The lower shaft 36 extends in the front-rear direction in the bed portion 2 and reciprocates around the axis E. The shuttle driving mechanism 90 is provided at the front end in the bed portion 2. The front end of the lower shaft 36 is connected to the shuttle drive mechanism 90. The shuttle drive mechanism 90 includes a half-turn shuttle 8. The half-turn hook 8 is driven as the lower shaft 36 is reciprocated and reciprocated in synchronization with the vertical movement of the needle bar 6. The lower shaft 36 includes a helical gear 37 at the rear end. The helical gear 37 meshes with the swing gear 71 of the transmission mechanism 40.

  The transmission mechanism 40 transmits the driving force generated by the rotation of the upper shaft 31 to the lower shaft 36. The transmission mechanism 40 includes a linkage 45, an upper connection part 50, and a lower connection part 70. The continuous rod 45 is rod-shaped and extends in the vertical direction within the pillar 3. The upper connection portion 50 connects the upper end portion of the linkage 45 to the upper shaft 31. The lower connecting portion 70 connects the lower end portion of the linkage 45 to the lower shaft 36.

  The upper connecting portion 50 is a link mechanism that converts the rotation operation of the upper shaft 31 into the reciprocating vertical operation of the linkage 45. The upper connecting part 50 includes a crank part 51, bearings 53 and 54, balancers 55 and 56, and a needle bearing 60.

  The crank portion 51 is provided on the upper shaft 31 and rotates integrally with the upper shaft 31. The crank part 51 has a crankshaft 52. That is, the crankshaft 52 is provided integrally with the upper shaft 31. The axis B of the crankshaft 52 is eccentric with respect to the axis A of the upper shaft 31 and is provided in parallel. That is, the crank portion 51 is provided on the upper shaft 31 by bending a part of the upper shaft 31 and forming a portion extending in parallel with the upper shaft 31 as the crank shaft 52. When the upper shaft 31 rotates about the axis A, the axis B of the crankshaft 52 circulates around the axis A.

  The upper shaft 31 fixes a pair of cylindrical bushes (not shown) to the front side and the rear side of the crank portion 51. The bearings 53 and 54 are annular bearings holding a plurality of ball rollers between the outer ring and the inner ring. The bearings 53 and 54 are provided on the front side and the rear side of the crank portion 51, respectively. The outer rings of the bearings 53 and 54 are fixed to the machine frame of the sewing machine 1. The inner rings of the bearings 53 and 54 are fitted into the bushes, and the upper shaft 31 is rotatably supported. The balancers 55 and 56 are provided on the front side of the bearing 53 and the rear side of the bearing 54, respectively, and are fixed to the upper shaft 31. The balancers 55 and 56 suppress the unbalance of the centrifugal force acting on the upper shaft 31 due to the rotation of the crankshaft 52. The positions of the center of gravity of the balancers 55 and 56 are located on the side opposite to the axis B of the crankshaft 52 with respect to the position of the axis A of the upper shaft 31.

  The needle bearing 60 is a cylindrical needle bearing that holds a plurality of needle rollers. The needle bearing 60 can be divided into an upper part and a lower part. The needle bearing 60 sandwiches the crankshaft 52, and the crankshaft 52 supports the needle bearing 60 rotatably. The linkage 45 has an annular upper ring portion 46 at the upper end. The upper ring part 46 can be divided into an upper part and a lower part. The lower part of the upper ring portion 46 is connected to the continuous 45 main body. In the state where the needle bearing 60 is held in the ring, the upper ring portion 46 fixes the upper portion to the lower portion with a screw. Therefore, the crankshaft 52 supports the upper ring portion 46 through the needle bearing 60 so as to be rotatable. An upper portion of the upper ring portion 46 has an oil supply hole 47 opened on the upper surface. The upper ring portion 46 takes in the lubricating oil from the oil supply hole 47 and lubricates the needle bearing 60 and the crankshaft 52.

  The lower connecting portion 70 is a link mechanism that converts the reciprocating vertical movement of the linkage 45 into the reciprocating rotational movement of the lower shaft 36. The lower connecting portion 70 includes a lever member 76, a washer 79, a swinging gear 71, bearings 72 and 73, collars 74 and 75, and an auxiliary shaft 77.

  The lever member 76 transmits the reciprocating vertical movement of the linkage 45 to the swing gear 71. The lever member 76 includes a connecting shaft 76B, a swinging rod 76C, and a gear shaft 76A. The connecting shaft 76B has a substantially cylindrical shape extending in the front-rear direction. The linkage 45 has an annular lower ring portion 48 at the lower end. The lower ring portion 48 rotatably supports the connecting shaft 76B within the ring. The washer 79 has a disc shape and is fixed to the front end of the connecting shaft 76B inserted through the lower ring portion 48 to prevent the lower ring portion 48 from coming off from the connecting shaft 76B.

  The swing rod 76C has one end at a connection portion with the rear end portion of the connecting shaft 76B, and has a substantially oval shape extending from one end perpendicular to the rear end portion of the connecting shaft 76B. The gear shaft 76A is provided at the other end of the swing rod 76C and has a substantially cylindrical shape protruding rearward. The axis C of the gear shaft 76A and the axis D of the connecting shaft 76B extend in parallel and are eccentric.

  The swing gear 71 is fixed to the gear shaft 76A. The gear shaft 76 </ b> A serves as a rotation center of the swing gear 71. The oscillating gear 71 includes an annular support portion 71A and a tooth portion 71B protruding in the radial direction from the support portion 71A. The support 71A is fixed to the gear shaft 76A with screws. The tooth portion 71B protrudes in a fan shape radially outward from a part of the outer peripheral surface of the support portion 71A. The tooth portion 71 </ b> B is formed as a helical tooth, and meshes with the helical gear 37 of the lower shaft 36.

  The bearings 72 and 73 are provided on the front side and the rear side of the swing gear 71, respectively. The bearings 72 and 73 are annular bearings holding a plurality of ball rollers between the outer ring and the inner ring. The inner rings of the bearings 72 and 73 are fitted into the gear shaft 76A, and the gear shaft 76A and the swing gear 71 are rotatably supported. The outer rings of the bearings 72 and 73 are fitted into the inner surfaces of the cylindrical collars 74 and 75. The collars 74 and 75 are fixed to the machine frame of the sewing machine 1 with screws. Therefore, when the linkage 45 reciprocates up and down, the shaft center D of the connecting shaft 76B reciprocates around the shaft center C of the gear shaft 76A. Therefore, the lever member 76 swings around the axis C. When the lever member 76 swings, the swing gear 71 reciprocates and rotates the lower shaft 36 reciprocally.

  The auxiliary shaft 77 is fixed to the rear end of the gear shaft 76A. The auxiliary shaft 77 has a mounting portion 77A and a shaft portion 77B. The gear shaft 76A has a through hole penetrating in the front-rear direction. The attachment portion 77A is longer than the gear shaft 76A. The attachment portion 77A is inserted through the through hole from the rear side of the gear shaft 76A and fixed to the gear shaft 76A with a screw. The distal end portion of the attachment portion 77A protrudes to the front side of the swing rod 76C. The tip of the attachment portion 77A has a D-shaped cross section, and the spring member 120 of the supply mechanism 110 is fixed to the tip of the attachment portion 77A with a screw. The shaft portion 77B has substantially the same diameter as the gear shaft 76A, and has a collar portion 77C for retaining the rear end. The shaft portion 77B extends the gear shaft 76A, and the collar portion 77C prevents the bearings 72, 73, etc. from coming off. When the linkage 45 reciprocates up and down, the auxiliary shaft 77 reciprocates together with the gear shaft 76A.

  When the sewing machine motor 21 is driven, the upper shaft 31 rotates about the axis A. The balance drive mechanism 80 and the needle bar drive mechanism 85 connected to the upper shaft 31 move the balance 14 and the needle bar 6 up and down, respectively. The crankshaft 52 that supports the upper ring portion 46 of the linkage 45 circulates around the axis A of the upper shaft 31. By rotation of the crankshaft 52, the linkage 45 reciprocates up and down and reciprocates up and down the connecting shaft 76B. The axis C of the connecting shaft 76B that supports the lower ring portion 48 of the linkage 45 moves along an arcuate track centering on the axis D of the gear shaft 76A. In the lever member 76, the gear shaft 76A reciprocates around the axis C. The rocking gear 71 fixed to the gear shaft 76A performs a reciprocating rotation operation about the axis C. The oscillating gear 71 transmits the driving force accompanying the reciprocating rotation operation via the helical gear 37, and reciprocates the lower shaft 36. A shuttle driving mechanism 90 connected to the lower shaft 36 reciprocates and rotates the half-rotating shuttle 8. Therefore, the half-turn hook 8, the balance 14, and the needle bar 6 are driven synchronously.

  The oil supply mechanism 100 will be described. The oil supply mechanism 100 includes a supply mechanism 110 and an oil container 150. The supply mechanism 110 supplies the transmission mechanism 40 with the lubricating oil stored in the oil reservoir 150 </ b> A of the oil container 150. The supply mechanism 110 includes a spring member 120 and an oil feed mechanism 130. The supply mechanism 110 will be described later. The transmission mechanism 40, the supply mechanism 110, and the oil storage unit 150A are disposed in the partition unit 15. The partition 15 partitions the arrangement area of the transmission mechanism 40, the supply mechanism 110, and the oil storage part 150 </ b> A inside the sewing machine 1 from the arrangement area of other mechanisms by the machine frame of the sewing machine 1 and the oil container 150. Other mechanisms such as the balance drive mechanism 80, the needle bar drive mechanism 85, and the shuttle drive mechanism 90 are provided outside the partition portion 15. The machine frame of the sewing machine 1 holds the outer rings of the bearings 53 and 54 of the upper coupling portion 50 at the upper portion of the partition portion 15. An oil seal (not shown) is provided between the machine frame of the sewing machine 1 and the bearings 53 and 54 to close the gap between the machine frame and the bearings 53 and 54. The machine frame of the sewing machine 1 holds the collars 74 and 75 of the lower connection part 70 and the outer ring of a bearing (not shown) that rotatably supports the lower shaft 36 at the lower part of the partition part 15. The oil seal is provided between the machine frame and the collars 74 and 75 and the bearing, and closes the gap between the machine frame and the collars 74 and 75 and the bearing.

  The part constituting the partition 15 of the machine 1 machine frame has openings 15A and 15B (see FIG. 5) in the upper and lower parts. The upper opening 15A sandwiches an annular packing (not shown) and covers it with a lid (not shown). The lid member prevents the lubricating oil from leaking out from the opening 15A. The lid member has an air hole (not shown) that communicates the inside and outside of the partition 15. When the temperature in the partition part 15 rises as the transmission mechanism 40 is driven, the air holes let the air expanded in the partition part 15 escape to the outside. Therefore, the air hole prevents the expanded air from pushing out the lubricating oil from the gap between the packings and leaking the lubricating oil to the outside. The oil container 150 covers the lower opening 15B of the machine frame from below. The partition part 15 isolates the transmission mechanism 40 and the supply mechanism 110 from other mechanisms. After lubricating the transmission mechanism 40, the oil container 150 receives and stores the lubricating oil that falls downward in the partition portion 15. The lubricating oil circulates in the partition 15.

  The oil container 150 will be described. As shown in FIGS. 7 to 11, the oil container 150 is a box-shaped container whose top is opened. The oil container 150 has an oil reservoir 150A and a flange 151. The oil reservoir 150A is located below the transmission mechanism 40. 150 A of oil storage parts receive and accommodate the lubricating oil which the supply mechanism 110 supplies to the transmission mechanism 40 within the partition part 15 and moves downward and drops. The flange 151 has an annular shape that protrudes laterally from the upper opening of the oil container 150. The shape of the upper surface 151 </ b> A of the flange portion 151 is a shape that follows the shape of the opening portion 15 </ b> B of the partition portion 15. The packing 16 (see FIG. 5) has an annular shape and is fitted into an annular groove 151B provided on the upper surface 151A of the flange 151. The groove portion 151B is a groove that dents the upper surface 151A downward. The oil container 150 has the upper surface 151A in close contact with the lower surface of the opening 15B through the packing 16, and is fixed to the machine frame of the sewing machine 1 with a screw. Therefore, the lubricating oil does not leak from between the oil container 150 and the opening 15B. The opening 15 </ b> B opens at a position on the right side in the left-right direction at the approximate center in the up-down direction in the bed portion 2. Therefore, the oil container 150 is disposed in the bed portion 2 at a position below the approximate center in the vertical direction and on the right side from the approximate center in the horizontal direction.

  The oil container 150 is formed of a metal such as aluminum. The oil container 150 includes a flange 151, a first bottom wall 164, a first front wall 161, a first rear wall 162, a right wall 163, a second bottom wall 174, a second front wall 171, a second rear wall 172, a left It has a wall 173, a third front wall 181, a third rear wall 182, an oblique wall 183, an intermediate wall 184, and a shelf wall 185.

  The first bottom wall 164 constitutes a part of the bottom surface of the oil container 150 and is provided in a region on the right side of the center of the oil container 150 in plan view. The first bottom wall 164 has a substantially trapezoidal shape in which the rear left side protrudes rearward than the right side in plan view, and the right front corner is recessed. The first front wall 161, the first rear wall 162, and the right wall 163 each rise substantially vertically from the front end, the rear end, and the right end of the first bottom wall 164, and the upper end portion is connected to the inner peripheral side end portion of the flange portion 151. To do.

  The second bottom wall 174 constitutes a part of the bottom surface of the oil container 150 and is provided in a region on the left side of the center of the oil container 150 in plan view. The second bottom wall 174 has a substantially rectangular shape in plan view. The second bottom wall 174 is located below the first bottom wall 164. The second front wall 171, the second rear wall 172, and the left wall 173 each rise substantially vertically from the front end, rear end, and left end of the second bottom wall 174, and the upper end is connected to the inner peripheral side end of the flange 151. To do.

  The shelf wall 185 is provided in a substantially central region of the oil container 150 in plan view, and is substantially parallel to the first bottom wall 164 and the second bottom wall 174. The shelf wall 185 has a substantially trapezoidal shape in which the rear right side projects rearward from the left side in plan view. The shelf wall 185 is provided below the flange 151 and above the first bottom wall 164. The inclined wall 183 extends obliquely downward to the right from the right end of the shelf wall 185 and is connected to the left end of the first bottom wall 164. The middle wall 184 extends substantially vertically downward from the left end of the shelf wall 185 and is connected to the right end of the second bottom wall 174. The third front wall 181 rises substantially vertically from the front end of each of the oblique wall 183, the middle wall 184, and the shelf wall 185, and the upper end portion is connected to the inner peripheral side end portion of the flange portion 151. The left and right ends of the third front wall 181 are connected to the second front wall 171 and the first front wall 161, respectively. The first front wall 161, the second front wall 171, and the third front wall 181 integrally form a front wall portion of the oil container 150. The third rear wall 182 rises substantially vertically from the rear ends of the inclined wall 183, the middle wall 184, and the shelf wall 185, and the upper end portion is connected to the inner peripheral side end portion of the flange portion 151. The left and right ends of the third rear wall 182 are connected to the second rear wall 172 and the first rear wall 162, respectively. The first rear wall 162, the second rear wall 172, and the third rear wall 182 together constitute a wall portion on the rear side of the oil container 150.

  The oblique wall 183, the middle wall 184, and the shelf wall 185 form a partition wall 180 that separates the oil reservoir 150A into two regions in the left-right direction. In the partition wall portion 180, the inclined wall 183 and the middle wall 184 extend upward from the first bottom wall 164 and the second bottom wall 174 to a position below the upper surface 151A, respectively. Oil storage unit 150 </ b> A includes an oil supply area 160 and an oil collection area 170. The oil supply area 160 is an area on the right side of the partition wall portion 180. The first bottom wall 164, the first front wall 161, the first rear wall 162, the right wall 163, and the oblique wall 183 surround the oil supply region 160. The oil supply area 160 is an area for storing the lubricating oil that the spring member 120 supplies to the transmission mechanism 40. The oil collection area 170 is an area on the left side of the partition wall portion 180. The second bottom wall 174, the second front wall 171, the second rear wall 172, the left wall 173, and the middle wall 184 surround the oil collection area 170. The oil collection area 170 is an area for receiving lubricating oil that is received and dropped from the transmission mechanism 40 as it is driven, and returns to the oil reservoir 150A.

  The oil container 150 has a magnet (not shown) disposed in the oil supply region 160. The first bottom wall 164 has an assembly portion 168 for assembling a magnet at the left front corner. The magnet adsorbs iron powder and the like contained in the lubricating oil by magnetic force, and removes the iron powder and the like from the lubricating oil.

  The oil container 150 has a discharge hole 152 in the oil collection area 170. The discharge hole 152 is formed in the left rear corner portion of the second bottom wall 174. The discharge hole 152 penetrates the second bottom wall 174 up and down, and communicates the inside and the outside of the oil container 150. The discharge hole 152 is a hole for discharging the lubricating oil in the oil reservoir 150 </ b> A to the outside during maintenance of the sewing machine 1. The discharge hole 152 is located at the left end of the oil container 150. As shown in FIG. 13, when the sewing machine 1 is tilted, the oil container 150 is tilted with the left side facing downward. At this time, the oil collection area 170 is located below the oil supply area 160. The inclined wall 183 is located below the oil supply region 160 and is inclined downward in a direction away from the first bottom wall 164. Therefore, the lubricating oil in the oil supply region 160 flows on the inclined surface 183A (see FIG. 17) and moves not to the oil collecting region 170 side. The discharge hole 152 provided in the oil collection area 170 is located at the lowest position in the entire area of the oil reservoir 150A in the tilted state. Therefore, the discharge hole 152 can discharge all the lubricating oil in the oil collection area 170.

  During normal use of the sewing machine 1, the oil container 150 fastens the screw 153 to the discharge hole 152. The screw 153 is provided with an O-ring 154 at the screw neck and closes the discharge hole 152. The oil container 150 includes a protrusion 155 at the opening portion of the discharge hole 152. The protruding portion 155 protrudes in a cylindrical shape from the periphery of the opening portion of the discharge hole 152 toward the outside of the oil container 150 at the outer wall of the second bottom wall 174. The X feeding motor 25 of the cloth feeding mechanism is located on the left side of the oil container 150 (see FIG. 6). As shown in FIGS. 12 and 13, when the sewing machine 1 is tilted, the X feed motor 25 is positioned below the oil container 150. The protrusion 155 guides the lubricating oil discharged from the discharge hole 152 to the side above the X-feed motor 25. Therefore, if the lubricating oil discharged from the discharge hole 152 is received by the oil recovery container 157 below the projecting portion 155, the lubricating oil does not sag to the X-feed motor 25 or the like.

  As shown in FIG. 6, the sewing machine 1 opens an injection port 2 </ b> B on the right surface of the bed portion 2. The injection port 2B communicates the inside and the outside of the partition portion 15. The inlet 2B is located above and to the right of the oil container 150. As shown in FIG. 14, when the sewing machine 1 is tilted, the user inserts the nozzle of the oil supply container 158 into the injection port 2B and supplies oil. After refueling, the inlet 2B closes the screw 2C (see FIG. 6) with an O-ring provided on the screw neck. Since the injection port 2B is provided in the bed part 2, the lubricating oil accumulates in the partition part 15 in the bed part 2 from the injection port 2B. The second bottom wall 174 of the oil container 150 opens a window portion 156 on the right front side of the discharge hole 152. When the sewing machine 1 is in a tilted state, the user can check the amount and the full position of the lubricating oil in the oil reservoir 150A through the window 156. In the tilted state, the oil container 150 is located below the inlet 2B. Therefore, lubricating oil accumulates in the partition part 15 containing the oil container 150, and does not immerse the inlet 2B.

  As shown in FIG. 6, when the sewing machine 1 is in the standing state, the oil container 150 is positioned below the inlet 2B. The lubricating oil accumulated in the partition 15 in the bed 2 moves into the oil container 150. The height of the oil level S (see FIG. 5) when the oil container 150 fully stores the lubricating oil in the oil reservoir 150A is higher than the height of the upper surface 185A of the shelf wall 185, and the upper surface 151A of the flange 151 Lower than the height of. Since the injection port 2B is located above the oil container 150, the sewing machine 1 can prevent oil leakage without leaving the injection port 2B immersed in the lubricating oil.

  The supply mechanism 110 will be described. As shown in FIG. 15, the spring member 120 of the supply mechanism 110 is formed by bending a plate material. The spring member 120 has a fixed part 121 and a moving part 125. The fixing part 121 is a part that fixes the spring member 120 to the lower connection part 70 of the transmission mechanism 40. The fixing part 121 is formed in a substantially rectangular shape and has two screw holes 122. The screw that passes through the screw hole 122 is fastened to the attachment portion 77 </ b> A of the auxiliary shaft 77, and the fixing portion 121 is fixed to the auxiliary shaft 77.

  The moving part 125 extends in a plate shape from one end of the fixed part 121 and bends approximately 45 degrees with respect to the fixed part 121. The moving part 125 has a scooping part 126 on the side opposite to the fixed part 121. The scooping portion 126 is a portion where the end portion of the moving portion 125 is bent at a substantially right angle on the upper side, which is the side where the moving portion 125 is bent with respect to the fixed portion 121. As for the plate | board width of the moving part 125, the scooping part 126 side is narrower than the fixed part 121 side. The surface of the moving unit 125 opposite to the side on which the scooping portion 126 bends with respect to the moving unit 125 is a sending unit 127.

  As shown in FIG. 5, the spring member 120 having the fixing portion 121 fixed to the attachment portion 77A is located above the oil storage portion 150A. The spring member 120 is reciprocally rotated together with the gear shaft 76 </ b> A in conjunction with the reciprocating vertical movement of the linkage 45. When the spring member 120 is positioned at one end of the rotation range, the moving part 125 including the scooping part 126 enters the oil supply area 160 of the oil storage part 150A. The position of the spring member 120 in this case is referred to as an entry position. As shown in FIG. 16, when the spring member 120 is located at the other end of the rotation range, the moving part 125 including the scooping part 126 is located above the oil supply area 160. The position of the spring member 120 in this case is referred to as an upper position. The jump member 120 reciprocates between the entry position and the upper position, and reciprocates the moving unit 125 between the entry position and the upper position.

  As shown in FIG. 17, the spring member 120 rotates from the entry position to the upper position (see arrow J). The jumping member 120 jumps up the lubricating oil adhering to the moving part 125 into the partition part 15 in the process of rotating to the upper position when the moving part 125 is immersed in the lubricating oil at the approach position (see arrow N). . Furthermore, since the scooping part 126 scoops up the lubricating oil in the oil supply region 160 in cooperation with the moving part 125, the splashing member 120 can splash more lubricating oil into the partition part 15. The lubricating oil jumps upward in the partition portion 15 and lubricates the upper connecting portion 50 of the transmission mechanism 40. The lubricating oil that has lubricated the transmission mechanism 40 receives heat generated when the transmission mechanism 40 is driven. The lubricating oil travels from the upper connecting portion 50 through the linkage 45, lubricates the lower connecting portion 70, and falls into the oil reservoir 150A. Further, the lubricating oil travels along the inner surface of the partition 15 and falls into the oil reservoir 150A.

  When the splash member 120 splashes the lubricating oil in the oil supply area 160, the oil level of the lubricating oil in the oil supply area 160 becomes lower than the oil level of the lubricating oil in the oil collection area 170. Therefore, the lubricating oil in the oil collection area 170 moves over the partition wall portion 180 and moves into the oil supply area 160 (see arrow L).

  As shown in FIG. 18, when the spring member 120 is located at the entry position, the delivery unit 127 faces the inclined surface 183 </ b> A of the inclined wall 183 in the fuel supply region 160. The upper surface of the inclined surface 183A is inclined toward the oil collection region 170 rather than the bottom. In the process in which the spring member 120 rotates from the upper position to the entry position (see arrow K), the delivery unit 127 pushes the lubricating oil in the oil supply region 160 from the upper right side to the left side with respect to the inclined surface 183A. . The lubricating oil moves along the inclined surface 183A, moves over the partition wall portion 180, and moves into the oil collection region 170 (see arrow M). That is, when the splash member 120 rotates from the upper position to the entry position, the lubricant oil received from the transmission mechanism 40 and falling into the oil reservoir 150A is sent from the oil supply area 160 to the oil collection area 170 by the delivery section 127. To do.

  The supply mechanism 110 does not use the lubricating oil in the oil collection area 170 for lubrication of the transmission mechanism 40, but uses the lubricating oil in the oil supply area 160 for lubrication of the transmission mechanism 40. Therefore, the lubricating oil in the oil collection area 170 stays in the oil collection area 170 except for the amount moved to the oil supply area 160. The capacity of the oil collection area 170 is larger than the capacity of the oil supply area 160. Accordingly, during the stay, the heat of the lubricating oil diffuses widely in the oil collection area 170. The temperature of the lubricating oil decreases in the oil collection area 170 until it moves from the oil collection area 170 over the partition wall portion 180 to the oil supply area 160. That is, the oil collecting area 170 can cool the lubricating oil while the lubricating oil stays in the oil collecting area 170.

  The reciprocating rotation of the spring member 120 is synchronized with the rotation of the upper shaft 31. Therefore, when the upper shaft 31 rotates at a high speed, the jumping member 120 reciprocates at a high speed, and when the upper shaft 31 rotates at a low speed, the jumping member 120 reciprocates at a low speed. The rotation speed when the upper shaft 31 rotates at a high speed is, for example, the rotation speed when the sewing machine motor 21 rotates at a speed equal to or higher than the median speed at which the upper shaft 31 can rotate. The rotational speed at which the upper shaft 31 rotates at a low speed is, for example, the rotational speed when the sewing machine motor 21 rotates at a speed lower than the median value at which the upper shaft 31 can rotate. When the spring member 120 reciprocates at low speed, the lubricating oil does not jump higher than when the spring member 120 reciprocates at high speed. In this case, the lubricating oil does not reach the upper part in the partition part 15 and the upper connecting part 50 may not be lubricated. Therefore, the supply mechanism 110 is provided with the oil feeding mechanism 130 to compensate for the insufficient supply of the lubricating oil by the spring member 120.

  As shown in FIG. 5, the oil feed mechanism 130 pipes an oil feed pipe 131 in the partition portion 15. The oil feed pipe 131 extends up and down along the machine 1 machine frame on the right side in the partition portion 15, and a core material 132 made of braid is inserted therein. That is, the core material 132 extends in the vertical direction in the partition portion 15. The oil feeding mechanism 130 feeds the lubricating oil by wick fuel supply using the capillary action of the core material 132 and supplies the lubricating oil to the transmission mechanism 40. The upper end portion 132 </ b> A of the core material 132 is in contact with the lubrication member 133. The oil supply member 133 is a felt member, for example. The oil-lubricating member 133 is fixed to a plate material provided in the opening 15 </ b> A above the partition 15. As shown in FIG. 16, when the upper shaft 31 rotates and the upper ring portion 46 of the linkage 45 is positioned above the upper shaft 31, the oil supply member 133 contacts the oil supply hole 47 of the upper ring portion 46. That is, the upper end portion 132 </ b> A of the core material 132 can contact the oil supply hole 47 of the upper ring portion 46 through the oil supply member 133.

  The lower end portion 132 </ b> B of the core material 132 is disposed in a storage mechanism 136 provided in the partition portion 15 near the connection portion between the bed portion 2 and the pedestal portion 3. The storage mechanism 136 is a felt member, for example, and is laid on a plate provided in a shelf shape at a position that does not interfere with the movable range of the linkage 45. The storage mechanism 136 is provided above the splash member 120. That is, the lower end portion 132 </ b> B of the core material 132 is provided below the upper connecting portion 50 and above the spring member 120. The height position at which the storage mechanism 136 is provided in the partition portion 15 is preferably a height position where the splashed lubricating oil reaches sufficiently when the splash member 120 reciprocates at low speed. In this case, the storage mechanism 136 can be moistened with the lubricating oil that the jumping member 120 jumps up, not only when the jumping member 120 reciprocates at a high speed but also at a low speed, and stores the lubricating oil. be able to.

  When lubricating oil is fed upward with wick fueling, the lubricating oil moves against gravity. Therefore, the amount of lubricating oil that the core material 132 can feed at a time decreases as the length of the core material 132 increases. When the storage mechanism 136 is provided above the jumping member 120, the storage mechanism 136 is closer to the upper connecting portion 50 in the vertical direction. In this case, the length of the core material 132 can be made relatively short, and the distance for feeding the lubricating oil by wick fueling can be made shorter. Therefore, the core material 132 can feed the lubricating oil to the upper connecting part 50 more reliably by the wick fueling.

  Part of the lubricating oil that lubricates the transmission mechanism 40 by the spring member 120 and falls downward in the partition portion 15 adheres to and penetrates the storage mechanism 136. The lubricating oil that has penetrated into the storage mechanism 136 penetrates into the lower end portion 132 </ b> B of the core material 132. The core material 132 supplies the lubricating oil from the lower end portion 132B to the upper end portion 132A by wick fueling. Lubricating oil penetrates oil supply member 133 from upper end 132A. The oil supply member 133 supplies lubricating oil to the oil supply hole 47 of the upper ring portion 46 of the linkage 45 that comes into contact with the rotation of the upper shaft 31. Therefore, the supply mechanism 110 can supply the lubricating oil to the upper connecting portion 50 even when the upper shaft 31 rotates at a low speed and the splash member 120 cannot raise the lubricating oil to the height of the upper connecting portion 50. .

  As shown in FIG. 5, the portion where the bed 2 and the pedestal 3 are connected in the partition 15 is located above the lower connecting portion 70. The helical gear 37 of the lower shaft 36 is located on the left side of the connecting portion between the bed portion 2 and the pedestal column portion 3. Therefore, the lubricating oil falling downward in the partition portion 15 cannot directly lubricate the helical gear 37. As shown in FIG. 6, the supply mechanism 110 includes a supply member 140 that supplies lubricating oil to the helical gear 37. The supply member 140 is a felt member that is fixed to the bed portion 2 and extends in the vertical direction, whose upper end portion is in contact with the gear teeth of the helical gear 37, and whose lower end portion is located within the oil collection region 170 of the oil container 150. . When the sewing machine 1 is in the standing state, the lubricating oil in the oil collecting region 170 moves from the lower end portion to the upper end portion using the capillary action of the supply member 140 and lubricates the helical gear 37.

  As described above, the moving part 125 of the spring member 120 reciprocates with the driving force by which the transmission mechanism 40 transmits the rotation of the upper shaft 31 to the lower shaft 36, and the lubricating oil in the oil reservoir 150 </ b> A is separated from the partition part 15. Jump up inside. Therefore, the spring member 120 jumps up the lubricating oil in accordance with the rotation of the upper shaft 31. That is, if the upper shaft 31 rotates at a high speed, the jumping member 120 operates at a high speed and splashes the lubricating oil, so that the lubricating oil can be splashed to a height at which the transmission mechanism 40 can be sufficiently lubricated. . Therefore, the supply mechanism 110 can reliably lubricate the transmission mechanism 40. The lubricating oil that has lubricated the transmission mechanism 40 moves downward in the partition 15 and returns to the oil reservoir 150A. That is, the oil supply mechanism 100 can circulate the lubricating oil in the partition portion 15, so that the necessity of replenishing the lubricating oil can be greatly reduced.

  When the upper shaft 31 rotates at a low speed, the splash member 120 operates at a low speed, and therefore, there is a possibility that the lubricating oil cannot be splashed up to a height at which the transmission mechanism 40 is lubricated. The supply mechanism 110 includes a core material 132 that can come into contact with the upper connecting portion 50, and supplies lubricating oil to the transmission mechanism 40 by wick fuel supply that uses the capillary action of the core material 132. Since the core material 132 is in contact with the upper connecting portion 50 to supply the lubricating oil to the upper connecting portion 50, even if the jumping member 120 cannot rebound the lubricating oil to a sufficient height by the reciprocating movement of the moving portion 125. The transmission mechanism 40 can be sufficiently lubricated.

  The wick fuel supply has a larger supply amount as the distance for feeding the lubricant is shorter. The oil supply mechanism 100 arranges the lower end portion 132 </ b> B of the core material 132 above the spring member 120. Therefore, since the distance which feeds lubricating oil can be shortened, the supply mechanism 110 can lubricate the transmission mechanism 40 reliably.

  The storage mechanism 136 is provided in the partition 15 near the connecting portion between the bed 2 and the pedestal 3. That is, the storage mechanism 136 is provided above the spring member 120 and the lower end portion 132B of the core material 132 is disposed. Part of the lubricating oil splashed by the splash member 120 stays at the storage mechanism 136 while returning to the oil storage unit 150A. Therefore, the supply mechanism 110 can maintain the lower end portion 132 </ b> B of the core material 132 in the state of being immersed in the lubricating oil by the storage mechanism 136, and can stably supply the lubricating oil to the upper shaft 31 and the upper connecting portion 50 of the transmission mechanism 40. Can be supplied.

  The crankshaft 52 is provided integrally with the upper shaft 31 and rotatably supports the upper ring portion 46 at the upper end of the linkage 45. Since the upper ring portion 46 only needs to have a size corresponding to the diameter of the crankshaft 52, the configuration of the connection portion (upper connection portion 50) between the upper shaft 31 and the linkage 45 can be reduced. Therefore, the sewing machine 1 can reduce the space in the partition portion 15. Therefore, since the area to which the splashed lubricant oil is applied can be reduced, the supply mechanism 110 can stably supply the lubricant oil to the upper shaft 31 and the upper connecting portion 50 of the transmission mechanism 40.

  The supply mechanism 110 has a structure in which the gear shaft 76 </ b> A rotates integrally with the swing gear 71 in the transmission mechanism 40 in the process in which the lubricant splashed into the partition 15 moves downward in the partition 15. Even the lubricating oil reaches. Therefore, the oil supply mechanism 100 can supply lubricating oil stably.

  By fixing the fixing portion 121 to the gear shaft 76A that reciprocally rotates, the moving portion 125 of the spring member 120 reliably moves back and forth between the entry position and the upper position. Therefore, the oil supply mechanism 100 can splash the lubricating oil in the oil storage portion 150 </ b> A into the partition portion 15 by the splash member 120.

  The moving part 125 has a scooping part 126, which is a part obtained by bending the end of the moving part 125 upward at a substantially right angle on the opposite side to the fixed part 121. When the moving part 125 moves to the entry position, the scooping part 126 scoops up the lubricating oil in cooperation with the moving part 125, so that the splashing member 120 can splash more lubricating oil into the partition part 15. The lubricant can be supplied stably.

  The spring member 120 can be formed at low cost by forming a plate material by bending it.

  The present invention is not limited to the above embodiment, and various modifications can be made. In the upper connecting portion 50, the crank shaft 52 provided on the upper shaft 31 supports the upper ring portion 46 of the linkage 45, and the rotation operation of the upper shaft 31 is converted into the reciprocating 45 reciprocating vertical motion. Not only this but the upper connection part 250 may be the structure which used the eccentric ring 251, for example. As shown in FIG. 19, the upper connecting portion 250 includes an eccentric ring 251, bearings 53 and 54, balancers 55 and 56, and a needle bearing 260. Since the bearings 53 and 54 and the balancers 55 and 56 have the same configuration as that of the upper connecting portion 50, description thereof is omitted.

  The eccentric wheel 251 is a disk-shaped rotating body with the axis G as the center. The eccentric ring 251 has a fixing hole 252 that opens in a circular shape at a position that is eccentric with respect to the axis G. The fixing hole 252 penetrates the eccentric ring 251 in the front-rear direction. The upper shaft 231 is inserted into the fixing hole 252 and fixed to the fixing hole 252 with a screw. The axis F of the upper shaft 231 is eccentric with respect to the axis G of the eccentric wheel 251. The upper shaft 231 is different from the upper shaft 31 in that the upper shaft 231 does not have the crank portion 51.

  The needle bearing 260 is a cylindrical needle bearing that holds a plurality of needle rollers. The needle bearing 260 holds the eccentric ring 251 in the ring and supports the shaft G so as to be rotatable about the axis G. The continuous rod 245 has an annular upper ring portion 246 at the upper end. The upper ring portion 246 holds the needle bearing 260 in the ring. Therefore, the eccentric ring 251 supports the upper ring portion 246 rotatably via the needle bearing 260. When the sewing machine motor 21 is driven and the upper shaft 231 rotates about the shaft center F, the shaft center G of the eccentric wheel 251 circulates around the shaft center F. Since the upper ring portion 246 circulates around the shaft center F together with the eccentric wheel 251, the linkage 245 can reciprocate up and down, and the lower shaft 36 can reciprocate through the lower connection portion 70.

  The upper connection part 250 includes an eccentric ring 251. The eccentric wheel 251 has a fixing hole 252, and the upper shaft 231 having an axis F that is eccentric with respect to the axis G is inserted through the fixing hole 252, so that the outer diameter is relatively large. Therefore, since the facing area between the outer peripheral surface of the eccentric wheel 251 and the inner peripheral surface of the upper ring portion 246 is large, the oil supply mechanism 100 needs to supply a large amount of lubricating oil. The supply mechanism 110 stably supplies a large amount of lubricating oil to the upper shaft 231 and the upper connecting portion 250 of the transmission mechanism 40 by splashing a large amount of lubricating oil from the oil reservoir 150A at a time by the splash member 120. can do.

  The lower connecting portion 70 is an insulator in which the swing rod 76C is connected to a gear shaft 76A that bears the rotation center of the swing gear 71 and a connection shaft 76B that rotatably supports the lower ring portion 48 of the linkage 45. Using the member 76, the reciprocating up / down motion of the linkage 45 was converted into the reciprocating rotational motion of the lower shaft 36. For example, the lower connecting portion 370 includes a gear shaft 372 that rotatably supports the swing gear 371 and a connecting shaft 373 that rotatably supports the lower ring portion 348 of the linkage 345. The structure using the lever member 376 to which the swinging rod 374 is connected may be used. As shown in FIG. 20, the lower connecting portion 370 includes a lever member 376, a gear shaft 372, a connecting shaft 373, a set collar 377, and a nut 378.

  The lever member 376 includes a swing gear 371 and a swing bar 374. The connecting shaft 373 is inserted into the lower ring portion 348 of the connecting rod 345 and fastened to one end of the swinging rod 374 with a nut 375, and the lower ring portion 348 of the connecting rod 345 is supported so as to be rotatable about the axis P. To do. The swing gear 371 is provided integrally with the swing bar 374 at the other end of the swing bar 374. The tooth portion of the rocking gear 371 protrudes in a fan shape radially outward from the other end of the rocking rod 374 to the side opposite to the one end. The circular support hole opens at the rotation center of the swing gear 371. The gear shaft 372 has a columnar shape centered on the axis Q at the center in the front-rear direction, and extends in the front-rear direction. The gear shaft 372 passes through the support hole and supports the swing gear 371 so as to be rotatable at the center in the front-rear direction. The set collar 377 is fixed to the gear shaft 372 and prevents the lever member 376 from coming off. The shaft center P and the shaft center Q are provided in parallel, and the swing rod 374 extends perpendicular to the shaft centers P and Q.

  When the linkage 345 reciprocates up and down, the axis P of the connecting shaft 373 reciprocates around the axis Q of the gear shaft 372. Therefore, the lever member 376 swings about the axis Q. The gear shaft 372 supports the swinging gear 371 without rotating because the both ends in the front-rear direction are fixed to the machine frame of the sewing machine 1. The oscillating gear 371 meshes with the helical gear 37 of the lower shaft 36 that rotates about the axis R. When the lever member 376 swings, the swing gear 371 reciprocates and rotates the lower shaft 36 reciprocally. In the case where the transmission mechanism includes the lower connecting portion 370, the jump member 120 may be fixed to the other end portion of the swinging rod 374, for example.

  The supply mechanism 110 supports the rotation of the swinging gear 371 without the gear shaft 372 rotating in the transmission mechanism 40 in the process in which the lubricant splashed into the partition 15 moves downward in the partition 15. Since the lubricating oil reaches the portion having the structure, the lubricating oil can be supplied stably.

  The spring member 120 is fixed to the attachment portion 77A of the auxiliary shaft 77 that fixes the gear shaft 76A. As shown in FIG. 21, the fixing portion 421 of the spring member 420 may be fixed to the swing gear 471. The jump member 420 has the same configuration as the jump member 120 of the above embodiment except that the fixing portion 421 is fixed to the swing gear 471. The oscillating gear 471 has the same configuration as the oscillating gear 71 of the above-described embodiment except that the fixing portion 421 can be fixed. The rocking gear 471 reciprocates around the gear shaft 76A. In this case, the moving member 425 reliably reciprocates between the entry position and the upper position in the same locus as the jumping member 120 fixed to the attachment portion 77A. Therefore, the oil supply mechanism 100 can splash the lubricating oil in the oil supply region 160 into the partition portion 15 by the spring member 420.

  As shown in FIG. 22, the fixing portion 521 of the spring member 520 may be fixed to the lower ring portion 548 of the linkage 545. The spring member 520 has the same configuration as the spring member 120 of the above embodiment, except that the fixing portion 521 is fixed to the lower ring portion 548 of the linkage 545. The linkage 545 has the same configuration as the linkage 45 of the above embodiment except that the fixing portion 521 can be fixed to the lower ring portion 548. The ream 545 reciprocates up and down. In this case, the moving part 525 of the spring member 520 is surely reciprocated up and down between the entry position and the upper position. Therefore, the oil supply mechanism 100 can splash the lubricating oil in the oil reservoir 150 </ b> A into the partition portion 15 by the splash member 520.

  The partition 15 does not have to cover the upper opening 15A with an annular packing and cover it with a lid. In such a case, for example, an intricate wall portion may be provided on the outside of the partition portion 15 so that the lubricating oil can be returned to the partition portion 15 even if the lubricating oil leaks from the inside of the partition portion 15 to the outside.

  The core material 132 may be exposed in the partition 15 without passing through the oil feed pipe 131. The lower end portion 132B of the core material 132 may not be disposed in the storage mechanism 136 but may be extended to the oil storage portion 150A and immersed in the lubricating oil. The lower end portion 132 </ b> B of the core material 132 may be positioned above the spring member 120 in the partition portion 15, and the storage mechanism 136 may be omitted. The core material 132 is not limited to the braid, and for example, an elongated felt member may be provided along the inner wall of the partition portion 15 to connect the lubricating member 133 and the storage mechanism 136. The storage mechanism 136 uses a felt member. However, the invention is not limited to this, and for example, a recess or the like may be provided in the partition portion 15 so that lubricating oil can be stored.

  As shown in FIG. 23, the core material 632 may be provided by being wound around the side surface of the linkage 645. In this case, the upper end 632 </ b> A of the core material 632 may be disposed in the oil supply hole 47. The linkage 645 may be provided with a hook 645A for fixing the lower end portion 632B of the core 632 on the side surface, and the lower end portion 632B may be disposed in contact with the side surface of the linkage 45. The lubricating oil that has lubricated the upper shaft 31 and the upper connecting portion 650 of the transmission mechanism 640 flows downward along the side surface of the linkage 645 where the upper ring portion 646 connects to the upper connecting portion 650. Therefore, the supply mechanism 610 can maintain the lower end portion 632B of the core material 632 immersed in the lubricating oil on the side surface of the linkage 645, and can stably supply the lubricating oil to the upper connecting portion 650.

  The splash member 120 is not limited to a plate shape. For example, the spring member 120 may be a member provided with a recess at the tip of a handle extending in a rod shape from the fixed portion 121. The scooping portion 126 is formed by bending the end portion of the moving portion 125, but the present invention is not limited to this, and a concave portion may be formed in the moving portion 125 to form the scooping portion 126. The spring member 120 may be formed as a scooping portion 126 by forming the entire moving portion 125 in a curved shape.

  In the above embodiment, the sewing machine motor 21 corresponds to the “motor” of the present invention. The balance drive mechanism 80, the needle bar drive mechanism 85, and the shuttle drive mechanism 90 are examples of the “other mechanism” of the present invention. The linkage 45 corresponds to the “transmission member” of the present invention. The upper ring portion 46 corresponds to the “upper end portion” of the present invention. The lower ring portion 48 corresponds to the “lower end portion” of the present invention. The upper end portion 132A corresponds to the “one end portion” of the present invention. The lower end 132B corresponds to the “other end” of the present invention. The core material 132 corresponds to the “light core member” of the present invention. The swing bars 76C and 374 correspond to the “swing member” of the present invention.

DESCRIPTION OF SYMBOLS 1 Sewing machine 15 Partition part 21 Sewing machine motor 31 Upper shaft 36 Lower shaft 37 Helical gear 40,640 Transmission mechanism 45,645 Link 46 Upper ring part 48 Lower ring part 50 Upper connection part 52 Crankshaft 70 Lower connection part 71 Swing Moving gear 76A Gear shaft 76B Connecting shaft 76C Oscillating rod 80 Balance drive mechanism 85 Needle bar drive mechanism 90 Hook drive mechanism 100 Oil supply mechanism 110 Supply mechanism 120 Bounce members 121, 421, 521 Fixed portion 125 Moving portion 126 Scoop portion 130 Oil feed Mechanism 132, 632 Core material 132A Upper end 132B, 632B Lower end 136 Storage mechanism 150 Oil container 150A Oil storage 251 Eccentric ring 252 Fixing hole 371 Oscillating gear 372 Gear shaft 373 Connecting shaft 374 Oscillating rod

Claims (14)

Below the transmission mechanism of the sewing machine, which is connected to an upper shaft that rotates by driving the motor and a lower shaft that is positioned below the upper shaft, and that includes a transmission mechanism that transmits the driving force of the upper shaft to the lower shaft. An oil reservoir for providing lubricating oil; and
In an oil supply mechanism for a sewing machine comprising a supply mechanism for supplying lubricating oil to be stored in the oil reservoir to the transmission mechanism,
The transmission mechanism, the oil reservoir, and the supply mechanism are arranged in a partition that partitions an arrangement region inside the sewing machine from other mechanisms,
The oil storage unit receives and stores the lubricating oil that the supply mechanism supplies to the transmission mechanism and moves downward in the partition,
The transmission mechanism is
A transmission member extending in the vertical direction;
Connecting the upper shaft to the upper end portion of the transmission member, and converting the rotational movement of the upper shaft into a reciprocating vertical movement of the transmission member;
A lower connecting portion that connects a lower end portion of the transmission member to the lower shaft, and converts a reciprocating vertical motion of the transmission member into a reciprocating rotational motion of the lower shaft;
With
The supply mechanism is provided above the oil reservoir, connected to the transmission mechanism, and interlocked with the reciprocating vertical movement of the transmission member, and enters the oil reservoir, and above the oil reservoir. A jumping member having a moving part that reciprocates between the upper position located at
When the jumping member moves to the entry position, the jumping member immerses the moving part in lubricating oil, and splashes the lubricating oil adhering to the moving part into the partition part in the process of moving from the entry position to the upper position. Sewing machine oil supply mechanism characterized by the above.   The supply mechanism has one end portion that can contact the upper connection portion, extends downward from the one end portion in the partition portion, and adheres to the other end portion disposed below the one end portion in the partition portion. 2. The sewing machine oil supply mechanism according to claim 1, further comprising a wick member that feeds lubricating oil to the upper connecting portion by wick supply. 3.   3. The sewing machine oil supply mechanism according to claim 2, wherein the other end portion of the wick member is disposed in the partition portion below the upper connecting portion and above the spring member. 4.   The oil supply mechanism for a sewing machine according to claim 3, wherein the other end portion of the wick member is arranged in contact with a side surface of the transmission member. The supply mechanism includes a storage mechanism that stores lubricating oil above the splash member,
The refueling mechanism for a sewing machine according to claim 3, wherein the other end of the wick member is disposed in the storage mechanism. The upper connecting portion is provided integrally with the upper shaft, and includes a crankshaft that is eccentric with respect to the axis of the upper shaft,
The oil supply mechanism for a sewing machine according to any one of claims 1 to 5, wherein the crankshaft rotatably supports the upper end portion of the transmission member. The upper connecting portion is formed in a disc shape and includes an eccentric ring having a fixing hole for inserting and fixing the upper shaft at a position eccentric with respect to the axis.
The oil supply mechanism for a sewing machine according to any one of claims 1 to 5, wherein the eccentric wheel rotatably supports the upper end portion of the transmission member. The lower connecting portion is
A rocking gear meshing with a gear tooth provided on the lower shaft;
A gear shaft fixed to the rocking gear and serving as a rotation center of the rocking gear;
A connecting shaft that extends in parallel with the gear shaft and rotatably supports the lower end of the transmission member;
The oil supply mechanism for a sewing machine according to claim 6 or 7, further comprising: a swinging member extending orthogonally to the connecting shaft and connected to the gear shaft and the connecting shaft. The lower connecting portion is
A rocking gear meshing with a gear tooth provided on the lower shaft;
A gear shaft that bears the center of rotation of the rocking gear and supports the rocking gear in a rotatable manner;
A connecting shaft that extends in parallel with the gear shaft and rotatably supports the lower end of the transmission member;
The oil supply mechanism for a sewing machine according to claim 6 or 7, further comprising: a swinging member extending perpendicularly to the connecting shaft and connected to the swinging gear and the connecting shaft. The spring member includes a fixed portion that is connected to the moving portion and fixed to the swing gear,
10. The oil supply mechanism for a sewing machine according to claim 8, wherein the moving unit reciprocates between the entry position and the upper position in accordance with a reciprocating rotation operation of the rocking gear. The spring member includes a fixing portion that is connected to the moving portion and is fixed to the lower end portion of the transmission member;
10. The oil supply mechanism for a sewing machine according to claim 8, wherein the moving portion reciprocates between the entry position and the upper position in accordance with a reciprocating vertical movement of the transmission member. The spring member includes a fixed portion that is connected to the moving portion and fixed to the gear shaft,
9. The oil supply mechanism for a sewing machine according to claim 8, wherein the moving unit reciprocates between the entry position and the upper position in accordance with a reciprocating rotation operation of the gear shaft.   13. The sewing machine according to claim 10, wherein the moving portion of the spring member has a scooping portion for scooping lubricating oil stored in the oil storage portion on a side opposite to the fixed portion side. Refueling mechanism. The spring member forms the moving part and the fixed part in an integral plate shape,
14. The sewing machine oil supply mechanism according to claim 13, wherein the scooping portion is formed by folding an end portion opposite to the fixed portion side upward.

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