JP2018089050A - Oil supply mechanism for sewing machine, oil container and sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil supply mechanism for sewing machine capable of preventing leakage of a lubrication oil from an injection port, an oil container and a sewing machine.SOLUTION: An opposing surface 141A faces an injection port 24 for refilling a lubrication oil to an oil container 100. A surface area of the opposing surface 141A is larger than an opening area of the injection port 24. An opposing member 141 blocks an oil droplet which falls into the oil container 100 by running down a post part 3 after oil supply to a drive mechanism, splashes on an oil surface vibrating due to the drive of a sewing machine and jumps toward the injection port 24. The opposing member 141 protrudes upward from a second bottom wall 108 of the oil container 100. Therefore, the oil droplet splashing on the oil surface does not go toward the injection port 24 by going through the opposing member 141 and the oil surface. An upper end part 141B of the opposing member 141 crosses a virtual line B connecting an edge part 24A of the injection port 24 and an edge part 27A of an opening part 27 by a straight line. Therefore, when supplying oil, even when the sewing machine is in a tilted state and the momentum of the lubrication oil discharged from a nozzle tip is strong, the lubrication oil always hits the opposing surface 141A, runs down on the opposing surface 141A and is stored in the oil container 100.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an oil supply mechanism for supplying oil to a sewing machine, an oil container, and a sewing machine.

  For example, the sewing machine described in Patent Document 1 includes an oil tank that stores lubricating oil supplied to the drive mechanism. The oil tank is provided with an inlet for injecting oil into the tank body at the lower part of the front surface. The injection port is connected to an injection path that inclines backward in the tank body. The injection path guides oil to the upper part of the tank body. The tank body includes a filter at the top. When refueling, if the sewing machine tilts and the tank body tilts backward, the inlet will face upward. The operator removes the cap from the inlet and puts oil from the inlet. The oil passes through the injection path from the injection port, passes through the filter, and is stored in the tank body. The full position of the tank body is below the filter, and even if the sewing machine stands up, the oil does not return to the inlet.

JP 2008-228784 A

  The sewing machine vibrates during driving, and the oil level in the tank body may vibrate. When the oil level of the oil in the tank body of Patent Document 1 vibrates, there is a possibility of entering the injection path. Since the injection path is inclined, the oil that has entered the injection path flows to the injection port. If the operator forgot to put on the cap of the inlet port that was removed by the operator during refueling and the inlet port was open, oil could leak out of the oil tank from the inlet port.

  An object of the present invention is to provide a sewing machine oil supply mechanism, an oil container, and a sewing machine that can prevent leakage of lubricating oil from an inlet.

  According to the first aspect of the present invention, there is provided a sewing machine including an oil container that is provided in a bed portion of the sewing machine and that stores lubricating oil, and a supply mechanism that supplies the lubricating oil stored in the oil container to an oil supply object. In the oil supply mechanism, the oil container is positioned below the opening that opens on the upper surface of the bed portion, the upper portion is opened, the oil supply object is positioned above the opening, and the supply mechanism is configured to supply the oil. The lubricating oil supplied to the object is dripped into the oil container through the opening, and the oil supply mechanism is positioned below the opening and in the height position of the oil surface of the lubricating oil stored in the oil container An injection port that is provided in the sewing machine at a position higher than the injection port, and communicates the inside and the outside of the sewing machine, and a position closer to the injection port than the injection port on the inner side of the sewing machine and directly below the opening. The opening area of the inlet facing the inlet Oil supply mechanism of the sewing machine, characterized in that the remote surface area provided opposing member having a wide facing surface is provided.

  The sewing machine vibrates when driven, and the oil level of the lubricating oil in the oil container vibrates. The lubricating oil supplied to the oil supply object passes through the opening and becomes oil droplets and falls on the oil surface. The opposing member prevents oil droplets that bounce off the vibrating oil surface and fly toward the injection port from reaching the injection port. Therefore, the oil supply mechanism can prevent the lubricating oil from leaking from the injection port to the outside of the sewing machine even if the injection port is open when the sewing machine is driven.

  1st aspect WHEREIN: The lower end part of the said opposing surface of the said opposing member is from the height position of the oil level at the time of the minimum amount which is the minimum quantity of lubricating oil accommodated in the said oil container required for the drive of the said sewing machine. May also be located below. The opposing surface of the opposing member is always immersed in the lubricating oil. The oil drop dripped through the opening does not pass between the opposing member and the oil surface even if it jumps on the oil surface. Therefore, the oil supply mechanism can further prevent the lubricating oil from leaking from the injection port to the outside of the sewing machine even if the injection port is open when the sewing machine is driven.

  In the first aspect, the facing member may protrude upward from the bottom of the oil container. The opposing surface of the opposing member must be immersed in the lubricating oil. The oil drop dripped through the opening does not pass between the opposing member and the oil surface even if it jumps on the oil surface. Therefore, the oil supply mechanism can further prevent the lubricating oil from leaking from the injection port to the outside of the sewing machine even if the injection port is open when the sewing machine is driven.

  1st aspect WHEREIN: The said sewing machine inclines in the direction opposite to the said injection hole with respect to the said standing state where the pedestal part standing from the position of the said opening part of the said bed part extends in an up-down direction, and the said standing state It is possible to switch to a tilted state, and when the sewing machine is in the tilted state, it is possible to inject lubricating oil into the oil container through the inlet, and the upper end portion of the facing surface of the facing member is You may cross | intersect at least the virtual line which connects the internal side edge part of the said sewing machine of an entrance, and the edge part of the said opening part with a straight line. When injecting lubricating oil into the oil container, the user of the sewing machine tilts the sewing machine and inserts the injection nozzle into the injection port. The lubricating oil discharged from the nozzle tip hits the opposite surface and flows into the oil container along the opposite surface. Since the upper end of the opposing surface is located between the inlet and the opening, even if the momentum of the lubricating oil discharged from the nozzle tip is strong, the lubricating oil always strikes the opposing surface and goes beyond the opposing surface toward the opening. Never fly. Therefore, the oil supply mechanism can reliably store the lubricating oil injected from the injection port in the oil container.

  1st aspect WHEREIN: The said oil container may be fixed to the said bed part, and the said inlet may open to the side surface of the said bed part above the said oil container. By providing the injection port on the side surface of the bed portion, the injection port is positioned farther upward from the position of the oil surface when it is full than when it is provided on the side surface of the oil container. Oil droplets are difficult to reach the height of the injection port even if they bounce off the oil surface. Therefore, the oil supply mechanism can prevent the lubricating oil from leaking from the injection port to the outside of the sewing machine even if the injection port is open during driving.

  According to the second aspect of the present invention, in the oil container of the sewing machine that is provided on the upper surface of the bed portion of the sewing machine and stores the lubricating oil, the oil container is located below the opening that opens on the upper surface of the bed portion. The upper part is opened, the oil supply object is located above the opening, and the lubricating oil supplied to the oil supply object is dropped into the oil container through the opening, and below the opening and With respect to the injection port provided in the sewing machine at a position higher than the height position of the oil level of the lubricating oil stored in the oil container, the injection port is located on the inner side of the sewing machine and directly below the opening. An oil container for a sewing machine is provided, which is provided with an opposing member that opposes the inlet at a close position and has an opposing surface having a surface area larger than the opening area of the inlet.

  The sewing machine vibrates when driven, and the oil level of the lubricating oil in the oil container vibrates. The lubricating oil supplied to the oil supply object passes through the opening and becomes oil droplets and falls on the oil surface. The opposing member prevents oil droplets that bounce off the vibrating oil surface and fly toward the injection port from reaching the injection port. Therefore, the oil container can prevent the lubricating oil from leaking from the injection port to the outside of the sewing machine even if the injection port is open when the sewing machine is driven.

  2nd aspect WHEREIN: The lower end part of the said opposing surface of the said opposing member is from the height position of the oil level at the time of the minimum amount which is the minimum quantity which the lubricating oil accommodated in the said oil container is required for the drive of the said sewing machine May also be located below. The opposing surface of the opposing member is always immersed in the lubricating oil. The oil drop dripped through the opening does not pass between the opposing member and the oil surface even if it jumps on the oil surface. Therefore, the oil container can further prevent the lubricating oil from leaking from the injection port to the outside of the sewing machine even if the injection port is open when the sewing machine is driven.

  In the second aspect, the facing member may protrude upward from the bottom. The opposing surface of the opposing member must be immersed in the lubricating oil. The oil drop dripped through the opening does not pass between the opposing member and the oil surface even if it jumps on the oil surface. Therefore, the oil container can further prevent the lubricating oil from leaking from the injection port to the outside of the sewing machine even if the injection port is open when the sewing machine is driven.

  In a second aspect, when the sewing machine is in a tilted state in which a pedestal portion standing from the position of the opening of the bed portion tilts in a direction opposite to the injection port with respect to an upright state extending in the vertical direction, Lubricating oil can be injected through the injection port, and the upper end portion of the opposing surface of the opposing member is a virtual connecting the inner side edge portion of the sewing machine and the edge portion of the opening portion with a straight line. You may at least intersect the line. When injecting lubricating oil into the oil container, the user of the sewing machine tilts the sewing machine and inserts the injection nozzle into the injection port. The lubricating oil discharged from the nozzle tip hits the opposite surface and flows into the oil container along the opposite surface. Since the upper end of the opposing surface is located between the inlet and the opening, even if the momentum of the lubricating oil discharged from the nozzle tip is strong, the lubricating oil always strikes the opposing surface and goes beyond the opposing surface toward the opening. Never fly. Therefore, the oil container can reliably accommodate the lubricating oil injected from the injection port in the oil container.

  According to the third aspect of the present invention, there is provided an oil supply mechanism including an oil container for storing lubricating oil, a supply mechanism for supplying the lubricating oil stored in the oil container to an oil supply object, and the oil container. In the sewing machine comprising a bed part, the oil container is located below the opening part opened on the upper surface of the bed part and the upper part is opened, and the oil supply object is located above the opening part, The lubricating oil supplied to the oil supply object by the supply mechanism is dropped into the oil container through the opening, and the oil supply mechanism is disposed below the opening and in the lubricating oil stored in the oil container. Provided in the sewing machine at a position higher than the height position of the oil level, an injection port that communicates the inside and outside of the sewing machine, and an inner side of the sewing machine with respect to the injection port and directly below the opening Opposite the inlet at a position near the inlet, the Sewing machine characterized in that the surface area than the opening area of the inlet is provided with a counter member having a wide facing surface is provided.

  The sewing machine vibrates when driven, and the oil level of the lubricating oil in the oil container vibrates. The lubricating oil supplied to the oil supply object passes through the opening and becomes oil droplets and falls on the oil surface. The opposing member prevents oil droplets that bounce off the vibrating oil surface and fly toward the injection port from reaching the injection port. Therefore, the sewing machine can prevent the lubricating oil from leaking from the injection port to the outside of the sewing machine even if the injection port is open when the sewing machine is driven.

1 is a front view of a sewing machine 1. FIG. FIG. 3 is a perspective view of the appearance of the tilted sewing machine 1 and the internal structure of the bed portion 2. 1 is a longitudinal sectional view of the sewing machine 1 in which the inside of the circle A is enlarged. It is sectional drawing of the bed part 2 planarly seen by the II line | wire of FIG. 3 is a front view of a presser foot drive mechanism 50 and an oil supply mechanism 80. FIG. FIG. 2 is a perspective view of a drive mechanism inside the sewing machine 1. 2 is a perspective view of an oil container 100. FIG. FIG. 6 is a cross-sectional view of the oil container 100 viewed from the left side along the line II-II in FIG. 5. It is sectional drawing of the oil container 100 looked at the right side by the III-III line of FIG. It is sectional drawing which looked at the bed part 2 of the tilted state on the left side. 3 is a plan view of an oil supply mechanism 80. FIG.

  An embodiment of the present invention will be described with reference to the drawings. The mechanical configuration of the sewing machine 1 will be described. In the following description, left, right, front, back, and top and bottom indicated by arrows in the figure are used. The sewing machine 1 is provided on the sewing machine base 6. The sewing machine base 6 includes a rectangular hole 6A. The sewing machine 1 includes a bed 2, a pedestal 3, and an arm 4.

  As shown in FIGS. 1 to 4, the bed portion 2 is a base of the sewing machine 1. The bed unit 2 includes a bed body 20 and an under cover 23. The bed body 20 includes a bed 21 and a fixing portion 22. The bed 21 has a substantially rectangular plate shape in plan view and extends in the left-right direction. When the sewing machine 1 is in the standing state, the bed 21 is engaged with the rectangular hole 6 </ b> A of the sewing machine base 6. The standing state is a state in which the pedestal 3 is vertically erected with respect to the upper surface (horizontal plane) of the sewing machine base 6. The bed 21 is provided with a needle plate 11 (see FIG. 6) on the left side. The needle plate 11 has a needle hole (not shown) on the left side. The needle plate 11 opens a feed dog hole 12 around the needle hole.

  The fixed portion 22 protrudes downward from the bottom surface of the bed 21. The fixing portion 22 is provided in a wall shape along the outer periphery of the bed 21. The lower rotating shaft 37, the shuttle drive mechanism 30, and the feed base drive mechanism 40 are each assembled to the fixed portion 22. The lower rotating shaft 37, the shuttle drive mechanism 30, and the feed base drive mechanism 40 will be described later. The fixing portion 22 has an attachment portion 26 for attaching the oil container 100 of the oil supply mechanism 80 to the right end portion.

  The front wall 26A, the rear wall 26B, the right wall 26C, and the partition wall 26D of the fixing portion 22 constitute the attachment portion 26. The partition wall 26D is a wall portion that connects the front wall 26A and the rear wall 26B back and forth. The partition wall 26D separates the part surrounded by the front wall 26A, the rear wall 26B, the right wall 26C, and the partition wall 26D from the other part on the left side of the partition wall 26D. The lower surfaces of the front wall 26A, the rear wall 26B, the right wall 26C, and the partition wall 26D are at the same height position.

  The sewing machine 1 includes an oil supply mechanism 80 that supplies lubricating oil to the drive mechanism. The oil supply mechanism 80 includes an oil container 100 that stores lubricating oil. The oil container 100 is a box-shaped container that is open at the top. The upper surface of the oil container 100 has substantially the same shape as the lower surface of the attachment portion 26. The packing 28 (see FIG. 3) is sandwiched between the upper surface of the oil container 100 and the lower surface of the attachment portion 26. The upper surface of the oil container 100 is in close contact with the lower surface of the mounting portion 26 via the packing 28 and is fixed to the mounting portion 26 with screws. The space in the oil container 100 and the space in the attachment portion 26 are isolated from other spaces in the bed portion 2. The bed 21 has an opening 27 (see FIG. 3) that communicates with the inside of the attachment portion 26. The oil container 100 receives and stores oil droplets that travel through the pedestal 3 and drop into the mounting portion 26 from the opening 27. The oil container 100 is connected in a sealed state in the mounting portion 26 and the pedestal portion 3. Therefore, the oil droplets dripping from the pedestal 3 always accumulate in the oil container 100. The oil supply mechanism 80 will be described later.

  The fixing portion 22 opens the injection port 24 at the right end portion of the front wall 26A (see FIG. 4). The injection port 24 is located above the oil container 100. The injection port 24 communicates the inside and the outside of the mounting portion 26. The height of the oil surface C (see FIG. 8) when the oil container 100 fully stores the lubricating oil is lower than the height of the first bottom wall 105 of the oil container 100. The height of the injection port 24 is located further upward from the position of the oil level C than when the injection port is provided in the front wall 101 of the oil container 100. Therefore, the height of the injection port 24 is a height that is difficult to reach even if the oil droplet dripped from the pedestal column portion 3 jumps on the oil surface C that vibrates as the sewing machine 1 is driven. During normal use of the sewing machine 1, the inlet 24 is closed with a plug member 25. The stopper member 25 prevents the lubricating oil in the oil container 100 from leaking from the injection port 24 to the outside of the sewing machine 1.

  The under cover 23 has a box shape with an open top, and is substantially rectangular in plan view and extends in the left-right direction. The under cover 23 is attached to the lower surface of the sewing machine base 6 in accordance with the formation position of the rectangular hole 6A. The inner surface of the rectangular hole 6A and the inner surface of the under cover 23 form a recess. When the sewing machine 1 is in the standing state, the bed 21 covers the rectangular hole 6A and the concave portion of the under cover 23 from above. The lower surface of the bed 21, the inner surface of the rectangular hole 6 </ b> A, and the inner surface of the under cover 23 form an internal space that accommodates the lower rotary shaft 37, the shuttle drive mechanism 30, the feed base drive mechanism 40, and the oil container 100.

  The pedestal 3 is provided at the right end of the bed 2 and extends upward. The pedestal 3 has an opening 3A at the lower end. The inside of the pedestal 3 and the inside of the attachment 26 of the bed 2 are connected via the opening 3 </ b> A and the opening 27 of the bed 21. The pedestal 3 includes a sewing machine motor 10 and a connecting rotary shaft 36. The sewing machine motor 10 is provided on the upper part of the pedestal column part 3 and fixed to the right side surface. The pulley 9 is provided on the right side of the sewing machine motor 10 and is fixed to a drive shaft extending to the right side of the sewing machine motor 10. A drive shaft extending to the left side of the sewing machine motor 10 is connected to the upper rotary shaft 35 via the joint 13. The pedestal 3 is attached with a pulley cover (not shown) on the right side. The pulley cover bulges to the right of the pedestal 3 and the pulley 9 projects from the opening on the right side. The connecting rotation shaft 36 is provided in the pillar 3 and extends in the vertical direction. The connecting rotary shaft 36 transmits the rotational driving force of the upper rotary shaft 35 to the lower rotary shaft 37.

  The arm portion 4 extends leftward from the upper end of the pedestal column portion 3. The arm part 4 faces the upper surface of the bed part 2. The upper rotating shaft 35 is provided in the arm portion 4 and extends in the left-right direction. The left end portion of the arm portion 4 is a tip portion 5. The tip portion 5 extends downward.

  The distal end portion 5 includes a presser foot 15 and a sewing needle 8 below. The distal end portion 5 includes a presser bar 16, a spring 17, a presser foot drive mechanism 50, a balance drive mechanism 70, and a needle bar drive mechanism 75. The balance drive mechanism 70 and the needle bar drive mechanism 75 will be described later. The presser bar 16 extends in the up-down direction within the distal end portion 5. The lower end of the presser bar 16 protrudes downward from the lower end of the tip portion 5. The presser foot 15 is provided at the lower end of the presser bar 16. The spring 17 is connected to the upper end of the presser bar 16. A knob 18 provided at the upper end of the tip 5 fixes the upper end of the spring 17. The spring 17 biases the presser bar 16 downward. The presser foot drive mechanism 50 moves the presser bar 16 upward while driving, and moves the presser foot 15 above the needle plate 11.

  As shown in FIG. 5, the presser foot drive mechanism 50 includes a crank 51, a shaft 52, a locking member 53, and a lever 54. The locking member 53 is provided at a substantially central portion of the presser bar 16 in the vertical direction. The locking member 53 has a rod shape and extends rearward. The locking member 53 is fixed to the presser bar 16 with a screw on the left side. The shaft 52 of the crank 51 is provided on the right side of the locking member 53. The crank 51 is a bent plate material. The shaft 52 supports the bent portion of the crank 51 in a swingable manner. A portion extending leftward from the bent portion of the crank 51 is located below a portion extending rearward of the locking member 53. The lever 54 is provided on the rear side of the crank 51. The operator uses the lever 54 when manually moving the presser foot 15 up and down.

  The upper end of the portion extending upward from the bent portion of the crank 51 is connected to the left end of the linkage 55. The linkage 55 extends rightward in the arm portion 4. The right end of the linkage 55 is connected to the crank 57. The crank 57 is provided in the upper part inside the pillar 3. The crank 57 is a bent plate material. The shaft 56 supports the bent portion of the crank 57 in a swingable manner. The knee-lifting rod 58 is connected to the right end of the portion extending rightward from the bent portion of the crank 57. The knee-lifting bar 58 extends in the vertical direction in the pedestal 3 and the bed 2. The lower end portion 58A of the knee-raising bar 58 protrudes downward from the oil container 100 through the insertion hole 114 (see FIG. 8) of the oil container 100.

  The under cover 23 of the bed unit 2 includes a knee pad 19 (see FIG. 1) that can be operated by an operator on the front surface. The knee pad 19 is connected to the vertical axis 62. The vertical axis 62 extends above the knee pad 19, bends to the right, and is connected to the horizontal axis 60 via a joint 59. The horizontal axis 60 extends rearward, and the rear part is located in the under cover 23. The bottom portion of the under cover 23 supports the horizontal shaft 60 in a rotatable manner. The knee-raising member 61 (see FIG. 3) is provided in the under cover 23 and fixed to the horizontal shaft 60. The knee-raising member 61 is a bent plate material and extends to the right of the horizontal axis 60. When the sewing machine 1 is in the standing state, the right end portion of the knee-raising member 61 is located below the knee-raising bar 58. The spring (not shown) urges the horizontal shaft 60 clockwise when viewed from the front, and moves the right end of the knee-raising member 61 downward.

  When the presser foot drive mechanism 50 is not driven, the knee pad 19 is located on the left side of the horizontal axis 60. The right end portion of the knee-raising member 61 is located below the movable range. The knee-lifting bar 58 is movable up and down. The spring 17 pushes down the presser bar 16 with an urging force. The crank 51 does not restrict the downward movement of the locking member 53. The presser foot 15 moves downward and presses the cloth on the needle plate 11.

  When the knee pad 19 is operated, the operator moves the knee pad 19 to the right using the knee. The horizontal axis 60 rotates counterclockwise when viewed from the front, and moves the right end portion of the knee-raising member 61 upward. The right end portion of the knee-raising member 61 abuts on the lower end portion 58A of the knee-raising rod 58 and pushes the knee-raising rod 58 upward. The knee-lifting bar 58 moves upward and rotates the crank 57 counterclockwise when viewed from the front. As the crank 57 rotates, the linkage 55 moves to the right and rotates the crank 51 clockwise as viewed from the front. The portion of the crank 51 that extends to the left from the bent portion moves upward and pushes up the locking member 53. The presser bar 16 moves up against the biasing force of the spring 17. The presser foot 15 moves upward to release the cloth.

  The drive mechanism of the sewing machine 1 will be described with reference to FIG. The sewing machine 1 includes a main drive mechanism 34. The main drive mechanism 34 includes an upper rotating shaft 35, a connecting rotating shaft 36, and a lower rotating shaft 37. The upper rotating shaft 35 extends in the left-right direction within the arm portion 4. The connecting rotation shaft 36 extends in the up-down direction within the pedestal 3. The lower rotating shaft 37 extends in the left-right direction within the bed portion 2.

  The right end of the upper rotating shaft 35 is connected to the sewing machine motor 10 via the joint 13. The sewing machine motor 10 rotates the upper rotary shaft 35. The supply unit 92 supports a substantially central portion of the upper rotation shaft 35 in the left-right direction. The supply unit 92 has a substantially cylindrical shape. Details of the supply unit 92 will be described later.

  The upper rotating shaft 35 includes an eccentric portion 39 and a bevel gear 35 </ b> A between the supply portion 92 and the sewing machine motor 10. The bevel gear 35 </ b> A is provided on the right side of the eccentric portion 39. The bevel gear 35 </ b> A transmits a driving force to the connecting rotary shaft 36. The axis of the eccentric portion 39 is eccentric from the axis of the upper rotary shaft 35. The eccentric portion 39 is connected to the upper end portion of the rod 45. The rod 45 transmits driving force to the feed base driving mechanism 40. The left end of the upper rotating shaft 35 is connected to the balance driving mechanism 70 and the needle bar driving mechanism 75. The sewing machine motor 10 rotates the upper rotary shaft 35 and transmits driving force to the balance driving mechanism 70 and the needle bar driving mechanism 75. The balance drive mechanism 70 includes a balance 14 and moves the balance 14 up and down. Since the structure of the balance drive mechanism 70 is well known, description thereof is omitted.

  The needle bar drive mechanism 75 includes a needle bar 7. The needle bar 7 is positioned above the needle plate 11 and extends in the up-down direction within the tip portion 5. The lower end portion of the distal end portion 5 faces the needle plate 11. The lower end portion of the needle bar 7 is exposed from the lower side of the distal end portion 5. The needle bar 7 has a sewing needle 8 attached to the lower end. The needle bar drive mechanism 75 reciprocates the needle bar 7 and the sewing needle 8 up and down as the upper rotary shaft 35 rotates. When the needle bar 7 is lowered, the lower end of the sewing needle 8 passes through the needle hole and reaches the upper portion of the rotary hook 31. A bobbin case (not shown) accommodates a bobbin (not shown) wound with a lower thread and is attached to the rotary hook 31. The sewing needle 8 holds the upper thread. The rotary hook 31 cooperates with the sewing needle 8 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 11 and forms a stitch on the cloth.

  The bevel gear 36 </ b> A is provided at the upper end of the connection rotation shaft 36. The bevel gear 36 </ b> A meshes with the bevel gear 35 </ b> A of the upper rotating shaft 35. The connecting rotation shaft 36 rotates as the upper rotation shaft 35 rotates. The bearing portion 63 supports a substantially central portion of the connecting rotary shaft 36 in the vertical direction. The bearing portion 63 has a cylindrical shape. The connecting rotary shaft 36 includes a bevel gear 36 </ b> B below the bearing portion 63. The lower end of the connecting rotary shaft 36 is connected to the oil supply pump 150. Oil supply pump 150 is arranged in oil container 100.

  The bevel gear 37 </ b> A is provided at the right end of the lower rotating shaft 37. The bevel gear 37 </ b> A meshes with the bevel gear 36 </ b> B of the connection rotation shaft 36. The lower rotating shaft 37 rotates as the connecting rotating shaft 36 rotates. The connecting rotary shaft 36 transmits a rotational driving force that causes the sewing machine motor 10 to rotate the upper rotary shaft 35 to the lower rotary shaft 37. The bearing portion 64 supports a substantially central portion of the lower rotating shaft 37 in the left-right direction. The bearing portion 64 has a cylindrical shape. The left end of the lower rotating shaft 37 is connected to the shuttle drive mechanism 30.

  The shuttle driving mechanism 30 includes a rotary shuttle 31. The rotary hook 31 is provided at the left end of the lower rotary shaft 37. The rotary hook 31 is driven as the lower rotary shaft 37 rotates and rotates in synchronization with the vertical movement of the sewing needle 8.

  The feed base drive mechanism 40 is a mechanism that moves the feed base 41 in the front-rear direction and the up-down direction and transports the sewing object. The feed base drive mechanism 40 includes a feed base 41, a vertical feed shaft 42, a horizontal feed shaft 43, and a feed motor 44. The feed base 41 is provided below the needle plate 11 and substantially parallel to the needle plate 11. The feed base 41 is provided with a feed dog (not shown) at the center of the upper surface. The feed dog extends in the front-rear direction and has an uneven portion at the top. The uneven portion of the feed dog is located in the feed dog hole 12. At the time of sewing, the feed base 41 protrudes the uneven portion of the feed dog from the feed dog hole 12 onto the needle plate 11 and sandwiches the cloth with the presser foot 15.

  The bed portion 2 supports the vertical feed shaft 42 so as to be rotatable. The vertical feed shaft 42 is provided behind the lower rotary shaft 37 in the bed portion 2. The vertical feed shaft 42 extends in the left-right direction in parallel with the lower rotation shaft 37. The vertical feed shaft 42 has a cylindrical shape, and supplies the lubricating oil transported from the oil container 100 by the transport pipe 85 to the link member 46. The right end portion of the vertical feed shaft 42 is connected to the lower end portion of the rod 45. The rod 45 extends rearward and downward from the eccentric portion 39 of the upper rotating shaft 35. The rod 45 moves up and down via the eccentric portion 39 as the upper rotary shaft 35 rotates, and swings the vertical feed shaft 42. The link member 46 is provided at the left end of the vertical feed shaft 42. The link member 46 is connected to the rear end of the feed base 41. When the vertical feed shaft 42 swings, the link member 46 moves the feed base 41 in the vertical direction. The vertical movement of the feed base 41 is synchronized with the vertical movement of the sewing needle 8.

  The feed motor 44 is provided on the left side of the oil container 100 in the bed portion 2. The feed motor 44 is a pulse motor and reciprocally rotates the drive shaft within a predetermined angle range. A drive shaft of the feed motor 44 is connected to one end of the link mechanism 47. The other end of the link mechanism 47 is fixed to the right end of the horizontal feed shaft 43. The horizontal feed shaft 43 is provided on the front side of the lower rotary shaft 37 and on the left side of the feed motor 44 in the bed portion 2. The horizontal feed shaft 43 extends in the left-right direction in parallel with the lower rotation shaft 37. The horizontal feed shaft 43 has a cylindrical shape, and supplies the lubricating oil transported from the oil container 100 to the link member 48 by the transport pipe 84. The link member 48 is provided at the left end portion of the horizontal feed shaft 43. The link member 48 is connected to the front end of the feed base 41. When the feed motor 44 is driven, the link mechanism 47 reciprocates the horizontal feed shaft 43 within a predetermined angle range. When the horizontal feed shaft 43 reciprocates, the link member 48 reciprocates the feed base 41 in the front-rear direction.

  The oil supply mechanism 80 of the sewing machine 1 will be described. The oil supply mechanism 80 includes an oil container 100, an oil supply pump 150, transport pipes 81 to 87, a joint 94, a plunger pump 91, and a supply unit 92.

  The oil container 100 will be described with reference to FIGS. 3, 4, and 7 to 10. The oil container 100 is formed of a metal such as aluminum. The oil container 100 includes a front wall 101, a first rear wall 102, a first left wall 103, a right wall 104, a first bottom wall 105, a second rear wall 106, a second left wall 107, and a second bottom wall 108. .

  The first bottom wall 105 and the second bottom wall 108 are formed in the entire area in the mounting portion 26 in a plan view and have a substantially rectangular shape. The second bottom wall 108 has a substantially rectangular shape, and is located in a region on the right front side in the attachment portion 26. The first bottom wall 105 has a bent shape, is provided in a portion on the left side from the rear side of the second bottom wall 108, and is positioned above the second bottom wall 108. The second rear wall 106 and the second left wall 107 rise substantially vertically from the rear end and the left end of the second bottom wall 108, respectively. The upper end of the second rear wall 106 is connected to the front end of a portion extending rightward from the left rear portion of the first bottom wall 105. The upper end of the second left wall 107 is connected to the right end of the portion extending forward from the left rear portion of the first bottom wall 105. The left end of the second rear wall 106 and the rear end of the second left wall 107 are connected.

  The first rear wall 102 and the first left wall 103 rise substantially vertically from the rear end and the left end of the first bottom wall 105, respectively. The left end of the first rear wall 102 and the rear end of the first left wall 103 are connected. The front wall 101 and the right wall 104 rise substantially vertically from the front and right ends of the first bottom wall 105 and the second bottom wall 108, respectively. The left end of the front wall 101 is connected to the front ends of the first left wall 103 and the second left wall 107, and the right end of the front wall 101 is connected to the front end of the right wall 104. The rear end of the right wall 104 is connected to the right ends of the first rear wall 102 and the second rear wall 106. The upper ends of the front wall 101, the first rear wall 102, the first left wall 103, and the right wall 104 are at the same height position.

  The region surrounded by the front wall 101, the first rear wall 102, the first left wall 103, the right wall 104, and the first bottom wall 105 is a region that mainly receives oil drops dripping from the pedestal 3. This region is referred to as an oil receiving region 120. The area surrounded by the front wall 101, the second rear wall 106, the second left wall 107, the right wall 104, and the second bottom wall 108 is an area that receives oil drops dripping from the pedestal 3 and contains lubricating oil. is there. This region is referred to as an oil collection region 125.

  The oil collection area 125 includes a hook oil area 130 and a drive oil area 140. The hook oil region 130 contains lubricating oil supplied to the hook drive mechanism 30. The drive oil region 140 contains lubricating oil to be supplied to the main drive mechanism 34, the feed base drive mechanism 40, the balance drive mechanism 70, and the needle bar drive mechanism 75. The hook oil region 130 has a substantially rectangular shape in plan view and is located on the left front side of the second bottom wall 108. The driving oil region 140 has a substantially L-shaped bent shape in plan view, and is located on the right side from the rear side of the hook oil region 130. The first partition wall 111 and the second partition wall 112 separate the hook oil region 130 and the drive oil region 140. The first partition wall 111 rises substantially vertically from the rear end of the hook oil region 130 and separates the hook oil region 130 and the drive oil region 140 in the front-rear direction. The left end of the first partition wall 111 is connected to the second left wall 107. The upper end of the first partition wall 111 is located below the first bottom wall 105. The second partition wall 112 rises substantially vertically from the right end of the hook oil region 130 and separates the hook oil region 130 and the drive oil region 140 in the left-right direction. The front end of the second partition wall 112 is connected to the front wall 101.

  The upper part of the hook oil region 130 is opened. The upper part of the hook oil region 130 is a circulation part 113 through which the lubricating oil flows between the hook oil region 130 and the drive oil region 140. The upper end of the second partition wall 112 is positioned below the upper end of the first partition wall 111. That is, the second partition wall 112 has a form in which the upper end portion is cut out downward. A portion above the upper end of the second partition wall 112 also functions as the circulation portion 113.

  The upper surface of the second bottom wall 108 is an inclined surface 108A that is inclined downward from the rear side toward the front side (see FIG. 9). The lubricating oil in the oil collection area 125 moves from the rear side to the front side in the oil collection area 125 along the inclined surface 108A. The hook oil region 130 is located on the left front side of the drive oil region 140. Even if the amount of the lubricating oil is small, the hook oil region 130 contains the lubricating oil flowing from the driving oil region 140 and secures the lubricating oil supplied to the hook driving mechanism 30.

  A left rear portion of the hook oil region 130 forms a recess 131 that is recessed leftward in the oil receiving region 120. The recess 131 extends the amount of lubricating oil contained in the hook oil region 130. The second left wall 107 and the front wall 101 in the hook oil region 130 including the inside of the recess 131 include a shelf 132 having the same height as the upper end of the first partition wall 111.

  In the hook oil region 130, a wire mesh filter 133 (see FIG. 4) is provided in the circulation portion 113. The filter 133 has an edge on the shelf 132 and covers the open portion at the top of the hook oil region 130. The right end portion of the filter 133 is bent downward and disposed on the right side of the second partition wall 112 to cover the open portion at the top of the second partition wall 112. The filter 133 is screwed to a boss standing from the second bottom wall 108 in the hook oil region 130 and fixed to the hook oil region 130. Therefore, the lubricating oil in the oil receiving area 120 and the lubricating oil in the driving oil area 140 always pass through the filter 133 when moving into the hook oil area 130. The filter 133 removes foreign matters larger than the mesh from the lubricating oil moving into the hook oil region 130.

  The magnet 136 is provided on the second bottom wall 108 at the right front portion in the hook oil region 130. The magnet 136 adheres iron powder or the like included in the lubricating oil in the hook oil region 130. An oil feed hole 134 for feeding lubricating oil to the hook drive mechanism 30 is provided in the front end portion of the second left wall 107 in the hook oil region 130. That is, the oil feeding hole 134 is located at the front end portion of the oil container 100. As shown in FIG. 10, the sewing machine 1 tilts in a tilted state during refueling. The tilted state is a state in which the pedestal 3 is tilted backward with respect to the upper surface (horizontal plane) of the sewing machine base 6. When the sewing machine 1 is in a tilted state, the front side is tilted upward with the hinge portion 2A at the rear of the bed portion 2 as an axis. The lubricating oil in the oil collection area 125 moves to a portion located on the rear side of the oil collection area 125 in the oil receiving area 120. Since the oil feeding hole 134 is located at a high position in the oil collecting region 125, it is located at a higher position than the level position of the oil level D in the tilted state. Therefore, when in the tilted state, the oil feeding hole 134 does not send out the lubricating oil.

  At the time of refueling, the operator checks the amount of refueling through a refueling window 117 (see FIG. 2) provided on the first bottom wall 105 of the oil container 100. Since the oil supply window 117 is provided on the first bottom wall 105, the oil supply window 117 faces the front side when the sewing machine 1 is tilted. Therefore, since the operator can easily visually recognize the oil supply window 117 during refueling, it is easy to check the amount of oil supply.

  As shown in FIGS. 3, 4, and 7 to 10, the cylindrical felt 135 is provided in the oil feed hole 134 (see FIG. 7). The right end portion of the felt 135 projects into the hook oil region 130. Therefore, when lubricating the hook drive mechanism 30, the lubricating oil in the hook oil region 130 always passes through the felt 135. The felt 135 removes foreign matter that has passed through the filter 133 and could not adhere to the magnet 136 from the lubricating oil supplied to the shuttle drive mechanism 30. Therefore, the oil container 100 supplies lubricating oil from which foreign matters have been removed to the shuttle drive mechanism 30.

  Oil pump 150 is arranged in drive oil region 140. Oil supply pump 150 is located on the right rear side of hook oil region 130 in plan view. The oil supply pump 150 is connected to the lower end of the connecting rotary shaft 36. The oil supply pump 150 rotates the impeller by the rotation of the connecting rotary shaft 36, sucks up the lubricating oil in the drive oil region 140, and sends it out to the transport pipe 86.

  The facing member 141 rises substantially vertically from the front end portion of the second bottom wall 108. The opposing member 141 has a thickness in the front-rear direction, has a plate shape with a width in the left-right direction, and extends upward. The lower part of the facing member 141 extends rightward and is connected to the right wall 104. The upper end portion 141 </ b> B of the facing member 141 extends above the upper end of the oil container 100 and is above the inlet 24 of the bed portion 2. The front surface of the facing member 141 is a facing surface 141A. The facing surface 141A faces the injection port 24. The surface area of the facing surface 141 </ b> A is larger than the opening area of the injection port 24. The opposing member 141 prevents the oil droplets dripped from the pedestal 3 from entering the injection port 24 when the oil droplet bounces on the oil surface that vibrates as the sewing machine 1 is driven.

  The opposing member 141 intersects the virtual line B (see FIG. 10). The imaginary line B is an imaginary line that connects the edge portion 24 </ b> A inside the fixed portion 22 of the injection port 24 and the edge portion 27 </ b> A of the opening portion 27 of the bed 21 with a straight line. That is, the upper end portion 141B of the facing member 141 is located above the imaginary line B. As shown in FIG. 10, the sewing machine 1 tilts in a tilted state during refueling. The operator inserts an injection nozzle 156 of the oil supply container 155 into the injection port 24 and supplies oil. The direction in which the injection nozzle 156 faces intersects with the extending direction of the facing member 141. Lubricating oil released from the nozzle tip 156A of the injection nozzle 156 hits the opposing surface 141A and flows into the oil container 100 through the opposing surface 141A. The opposing member 141 that intersects the imaginary line B prevents the lubricating oil discharged from the nozzle tip 156 A of the injection nozzle 156 from flying toward the opening 27.

  The facing member 141 is located closer to the injection port 24 than directly below the pedestal 3 in the front-rear direction. The farther the facing member 141 is from the injection port 24, the more the clearance between the facing member 141 and the front wall 26A is generated. The lubricating oil contained in the oil container 100 vibrates as the sewing machine 1 is driven. Therefore, when the oil drop dripping from the pedestal part 3 jumps on the vibrating oil surface, it may fly vigorously and enter between the opposing member 141 and the front wall 26A and reach the injection port 24. The distance between the facing member 141 and the front wall 26A is preferably a distance that allows the nozzle tip 156A to abut against the facing surface 141A when the operator inserts the injection nozzle 156 halfway into the injection port 24, for example. .

  The facing member 141 extends upward from the second bottom wall 108. Therefore, even when the amount of the lubricating oil stored in the oil container 100 is the lower limit amount that is the minimum amount necessary for driving the sewing machine 1, the facing surface 141A is always immersed in the lubricating oil. Even if the oil drop dripped from the pedestal part 3 jumps on the oil surface that vibrates as the sewing machine 1 is driven, it does not pass between the opposing member 141 and the oil surface.

  As shown in FIGS. 3, 4, and 7 to 10, the second rear wall 106 of the drive oil region 140 has a connection path 142 at the left end. The connection path 142 has a groove shape inclined with respect to the second rear wall 106 and extends from the lower front side to the upper rear side. The connection path 142 connects the upper surface of the second bottom wall 108 and the upper surface of the first bottom wall 105. The discharge hole 126 is provided behind the connection path 142 at the rear end of the first bottom wall 105. The discharge hole 126 penetrates the first bottom wall 105 up and down, and communicates the inside and the outside of the oil container 100.

  During normal use of the sewing machine 1, the oil container 100 fastens a screw (not shown) to the discharge hole 126. The screw is provided with an O-ring at the screw neck and closes the discharge hole 126. When draining, the sewing machine 1 is switched from the standing state to the tilted state. The lubricating oil in the oil collection area 125 moves into the oil receiving area 120. The lubricating oil flows from the oil collecting area 125 to the oil receiving area 120 through the connection path 142. The discharge hole 126 discharges the lubricating oil in the oil receiving area 120 to the outside of the oil container 100. Since the connection path 142 is inclined, even if the amount of the lubricating oil in the oil collection area 125 becomes small, the lubricating oil in the oil collection area 125 does not remain and flows to the oil receiving area 120.

  The first left wall 103 of the oil receiving area 120 opens a recovery hole 121 (see FIG. 7) at the rear. The oil container 100 collects the lubricating oil circulated through the shuttle drive mechanism 30 into the oil receiving area 120 from the collection hole 121. The first left wall 103 opens a supply hole 122 at the front. The oil container 100 supplies lubricating oil to the feed base drive mechanism 40 through the supply hole 122.

  The first bottom wall 105 of the oil receiving area 120 has an insertion hole 114. The insertion hole 114 opens at the rear part of the first bottom wall 105, and allows the knee-lifting bar 58 to pass in the vertical direction. The first bottom wall 105 includes a cylindrical portion 115 protruding upward. The cylindrical portion 115 extends in a cylindrical shape upward from the first bottom wall 105 around the insertion hole 114. A cylindrical hole 115A of the cylindrical portion 115 is connected to the insertion hole 114 and allows the knee-lifting bar 58 to pass in the vertical direction. The upper end of the cylindrical portion 115 is located above the upper ends of the front wall 101, the first rear wall 102, the first left wall 103, and the right wall 104.

  The covering member 145 is provided on the side surface of the knee-lifting bar 58. The covering member 145 is, for example, a resin such as rubber, and includes an upper covering portion 146 and a side surface covering portion 147. The upper cover 146 has a circular plate shape, and a holding hole 146A is opened at the center. The side cover 147 has a cylindrical shape extending downward from the outer peripheral side edge of the upper cover 146. The inner surface of the holding hole 146A is in close contact with the outer surface of the knee-lifting bar 58. The covering member 145 covers the cylindrical portion 115 from above and moves up and down together with the knee-lifting rod 58.

  The oil container 100 is provided with a protection member 160 on the cylindrical portion 115. The protection member 160 is a resin such as rubber, for example, and includes a bottom wall portion 161 and a peripheral wall portion 162. The bottom wall portion 161 has a circular plate shape, and a holding hole 161A is opened at the center. The inner surface of the holding hole 161A is in close contact with the outer surface of the cylindrical portion 115. The peripheral wall portion 162 is provided on the outer peripheral side edge portion of the bottom wall portion 161 and extends in a cylindrical shape in the vertical direction. The bottom wall portion 161 has four through holes 163 on the outer peripheral side edge portion. The through hole 163 causes oil drops dropped on the upper surface of the bottom wall portion 161 through the covering member 145 to flow below the bottom wall portion 161. When the presser foot drive mechanism 50 is driven, the covering member 145 moves upward together with the knee-lifting bar 58. When the covering member 145 is positioned at the uppermost position in the vertical movement range, the lower end of the side surface covering portion 147 is positioned on the upper side of the cylindrical portion 115. Therefore, even if the cover member 145 moves to any position in the vertical movement range, the protection member 160 does not expose the tubular portion 115 and prevents the lubricating oil from adhering to the tubular portion 115.

  As shown in FIGS. 5, 6, and 11, the plunger pump 91 of the oil supply mechanism 80 supplies lubricating oil to the shuttle driving mechanism 30. The plunger pump 91 is provided on the right side of the rotary hook 31 of the hook drive mechanism 30. The plunger pump 91 includes a pump metal 911 and a plunger 912. The pump metal 911 has a substantially cylindrical shape and supports a substantially central portion of the lower rotating shaft 37 in the left-right direction. The plunger 912 is provided in the pump metal 911 and can advance and retreat in the radial direction of the pump metal 911. The plunger pump 91 is an oil supply pump that is driven when the plunger 912 advances and retreats as the lower rotary shaft 37 rotates. The oil container 100 is provided with a joint 137 in the oil feed hole 134 of the hook oil region 130 on the outer wall side of the second left wall 107. One end of the transport pipe 81 is connected to the joint 137. The transport pipe 81 is piped in the bed portion 2 to the left of the oil container 100, and the other end is connected to the plunger pump 91. The plunger pump 91 sucks the lubricating oil transported from the oil container 100 by the transport pipe 81 and supplies the lubricating oil to the rotary hook 31 via the lower rotating shaft 37.

  The oil container 100 is provided with a joint 123 (see FIG. 7) in the recovery hole 121 of the oil receiving area 120 on the outer wall side of the first left wall 103. One end of the transport pipe 82 is connected to the joint 123. The transport pipe 82 is piped to the left in the bed portion 2, and the other end is connected to the plunger pump 91. The plunger pump 91 collects excess lubricating oil supplied to the rotary hook 31 and sends it to the transport pipe 82. The oil container 100 receives the lubricating oil transported by the transport pipe 82 from the collection hole 121 into the oil receiving area 120 and stores it in the oil collecting area 125.

  The transport pipes 83 to 85 of the oil supply mechanism 80 supply lubricating oil to the feed base drive mechanism 40. The oil container 100 is provided with a joint 124 (see FIG. 7) in the supply hole 122 of the oil receiving area 120 on the outer wall side of the first left wall 103. One end of the transport pipe 83 is connected to the joint 124. The transport pipe 83 is piped to the left in the bed portion 2 and the other end is connected to the right mounting port 96 of the joint 94.

  As shown in FIG. 11, the joint 94 includes a main body portion 95, a right attachment port 96, a left attachment port 97, and a rear attachment port 98. The right mounting port 96, the left mounting port 97, and the rear mounting port 98 are provided on the right side, the left side, and the rear side of the main body portion 95, respectively. The main body portion 95 is a pipe that branches into two hands inside, and connects the right attachment port 96, the left attachment port 97, and the rear attachment port 98 within the main body portion 95.

  One end of the transport pipe 84 is connected to the left mounting port 97 of the joint 94. The transport pipe 84 is piped inside the bed portion 2 to the left of the joint 94. The other end of the joint 94 is connected to the horizontal feed shaft 43 of the feed base drive mechanism 40. One end of the transport pipe 85 is connected to the rear mounting port 98 of the joint 94. The transport pipe 85 pipes the inside of the bed portion 2 to the rear and to the left of the joint 94. The other end of the joint 94 is connected to the vertical feed shaft 42 of the feed base drive mechanism 40.

  The transport pipes 83 to 85 and the joint 94 pass the wick 88 inside. The wick 88 is exposed in the oil container 100 from the transport pipe 83 through the supply hole 122. The end portion of the wick 88 extends over the hook oil region 130 and is fixed to a boss provided on the second bottom wall 108 in the drive oil region 140 with a screw 108B (see FIG. 4). Therefore, the oil container 100 always maintains the state where the wick 88 is immersed in the lubricating oil. The wick 88 extends from the transport tube 84 into the horizontal feed shaft 43 and extends from the transport tube 85 into the vertical feed shaft 42. The oil container 100 supplies lubricating oil to the feed base drive mechanism 40 by wick fueling using the capillary action of the wick 88.

  The oil supply pump 150 of the oil supply mechanism 80 supplies lubricating oil to the main drive mechanism 34 via the transport pipe 86. The transport pipe 86 is piped into the pedestal 3. The transport pipe 86 connects the oil supply pump 150 and the supply unit 92. The supply unit 92 has a hole 92A on the right side surface. The supply unit 92 takes in the lubricating oil sent out by the oil supply pump 150 and transported by the transport pipe 86 from the hole 92A. The supply unit 92 sends lubricating oil to an oil supply hole (not shown) provided in the upper rotary shaft 35. The oil supply hole extends in the left-right direction along the axis of the upper rotation shaft 35 in the upper rotation shaft 35. The oil supply holes have openings (not shown) in the vicinity of the eccentric portion 39 and the bevel gear 35A, respectively, and connect the inside of the supply portion 92 to the eccentric portion 39 and the vicinity of the bevel gear 35A. When the upper rotating shaft 35 rotates, the lubricating oil flowing through the oil supply hole overflows from the opening and moistens the eccentric portion 39 and the bevel gear 35A. The lubricating oil supplied to the bevel gear 35A suppresses heat generation caused by friction between the bevel gear 35A and the bevel gear 36A, and prevents a seizure phenomenon.

  As the bevel gear 35A and the bevel gear 36A rotate, the lubricating oil changes into a mist and is discharged to the surroundings. The mist-like lubricating oil scatters in the pillar 3 and moisturizes the bevel gear 36B, the bevel gear 37A, and the like. The lubricating oil suppresses heat generation caused by friction between the bevel gear 36B and the bevel gear 37A, and prevents a seizure phenomenon. When the lubricating oil splashed into the pillar 3 falls down, the oil container 100 located below the pillar 3 receives and stores the lubricating oil. The oil container 100 reuses the lubricating oil stored in the oil collecting area 125. The lubricating oil circulates inside the sewing machine 1.

  The transport pipe 87 of the oil supply mechanism 80 supplies lubricating oil to the balance drive mechanism 70 and the needle bar drive mechanism 75. The transport pipe 87 is piped in the arm portion 4. One end of the transport pipe 87 extends into the pillar 3 and the other end is connected to the supply unit 76. The supply unit 76 is provided at the distal end 5 and supplies lubricating oil transported by the transport pipe 86 to the balance drive mechanism 70 and the needle bar drive mechanism 75. The transport tube 87 passes the wick 89 (see FIG. 5) inside. The wick 89 is exposed in the pedestal 3 from one end of the transport tube 87. The end of the wick 89 exposed in the pedestal 3 is positioned above the oil container 100.

  A part of the lubricating oil scattered in the form of a mist in the pillar 3 adheres to the end of the wick 89 exposed in the pillar 3. The transport tube 87 transports the lubricating oil to the supply unit 76 by wick fueling using the capillary action of the wick 89. The supply unit 76 supplies lubricating oil to the balance drive mechanism 70 and the needle bar drive mechanism 75. The wick 89 is not always immersed in the lubricating oil. Therefore, the transport pipe 87 suppresses the amount of lubricating oil transported to the supply unit 76.

  As described above, the sewing machine 1 vibrates when driven, and the oil level of the lubricating oil in the oil container 100 vibrates. The lubricating oil supplied to the eccentric part 39 and the bevel gear 35 </ b> A scatters into the pillar 3 and falls downward, passes through the opening 27, and drops as oil droplets on the oil surface. The opposing member 141 prevents the oil droplets that bounce off the vibrating oil surface and fly toward the injection port 24 from reaching the injection port 24. Therefore, the oil supply mechanism 80 can prevent the lubricating oil from leaking from the injection port 24 to the outside of the sewing machine 1 even if the injection port 24 is open when the sewing machine 1 is driven.

  The facing member 141 extends upward from the second bottom wall 108. Therefore, even when the amount of lubricating oil stored in the oil container 100 is the lower limit amount that is the minimum amount necessary for driving the sewing machine 1, the facing surface 141A is always immersed in the lubricating oil. Even if the oil droplet dripped through the opening 27 bounces off the oil surface, it does not pass between the opposing member 141 and the oil surface. Therefore, the oil supply mechanism 80 can further prevent the lubricating oil from leaking from the injection port 24 to the outside of the sewing machine 1 even if the injection port 24 is open when the sewing machine 1 is driven.

  When injecting lubricating oil into the oil container 100, the user of the sewing machine 1 puts the injection nozzle 156 into the injection port 24 with the sewing machine 1 tilted. The lubricating oil discharged from the nozzle tip 156A hits the opposing surface 141A and flows into the oil container 100 through the opposing surface 141A. Since the upper end portion 141B of the facing surface 141A is located between the injection port 24 and the opening portion 27, even if the momentum of the lubricating oil discharged from the nozzle tip 156A is strong, the lubricating oil always hits the facing surface 141A and hits the facing surface 141A. It does not fly toward the opening 27 beyond. Therefore, the oil supply mechanism 80 can reliably store the lubricating oil injected from the injection port 24 in the oil container 100.

  By providing the inlet 24 in the front wall 26A of the fixed portion 22 of the bed portion 2, the inlet 24 is positioned away from the position of the oil level when full in comparison with the case where it is provided on the side surface of the oil container 100. To do. Even if the oil droplet bounces on the oil surface, it is difficult to reach the height of the injection port 24. Therefore, the oil supply mechanism 80 can prevent the lubricating oil from leaking from the injection port 24 to the outside of the sewing machine 1 even if the injection port 24 is open during driving.

  The present invention can be variously modified in addition to the above embodiment. The opposing member 141 is provided so as to protrude upward from the second bottom wall 108, but may be provided so as to protrude leftward from the right wall 104. In this case, the upper end portion 141B of the facing member 141 only needs to cross at least the virtual line B. Alternatively, the facing member 141 may be provided on the fixed portion 22 of the bed portion 2. In this case, the lower end portion of the opposing member 141 extends downward so that the opposing surface 141A is always immersed in the lubricating oil even when the amount of lubricating oil accommodated in the oil container 100 is the lower limit amount necessary for driving the sewing machine 1. It is good to.

  The upper end portion 141B of the facing member 141 may not be positioned above the imaginary line B. In this case, the opposing member 141 may be configured so that the opposing surface 141A faces the injection port 24 and the surface area of the opposing surface 141A is larger than the opening area of the injection port 24.

  The oil supply pump 150 may not be provided. In this case, the transport pipe 86 connects the inside of the oil container 100 and the supply unit 92, and the supply unit 92 may be provided with a pump similar to the plunger pump 91 inside. The transport pipe 86 may be provided so as to be immersed in the lubricating oil even when the amount of the lubricating oil stored in the oil container 100 is the lower limit amount necessary for driving the sewing machine 1.

  The opposing member 141 is not limited to a plate shape, and may be a block shape. A partition wall may be provided instead of the facing member 141, and the partition wall may isolate the region connected to the injection port 24 from the oil collection region 125.

  In the above description, the main drive mechanism 34 corresponds to the “refueling object” of the present invention. The oil supply pump 150 and the supply unit 92 correspond to the “supply mechanism” of the present invention. The bed 21 corresponds to the “upper surface” of the bed portion of the present invention. The second bottom wall 108 corresponds to the “bottom” of the present invention. The front wall 26A corresponds to the “side surface” of the bed portion of the present invention.

DESCRIPTION OF SYMBOLS 1 Sewing machine 2 Bed part 3 Leg column part 21 Bed 24 Inlet 24A Edge part 26A Front wall 27 Opening part 34 Main drive mechanism 80 Oil supply mechanism 92 Supply part 100 Oil container 108 Second bottom wall 141 Opposing member 141A Opposing surface 141B Upper end part 150 Oil pump

Claims (10)

An oil container that is provided in the bed portion of the sewing machine and contains lubricating oil;
In an oil supply mechanism of a sewing machine comprising a supply mechanism for supplying lubricating oil contained in the oil container to an oil supply object,
The oil container is located below the opening that opens on the upper surface of the bed part, and the upper part is open,
The refueling object is located above the opening,
The lubricating oil supplied to the oil supply object by the supply mechanism is dropped into the oil container through the opening,
The oil supply mechanism is
An injection port provided in the sewing machine at a position below the opening and above the height position of the oil level of the lubricating oil accommodated in the oil container, and communicating the inside and the outside of the sewing machine,
An opposing member having an opposing surface that faces the inlet at a position closer to the inlet than the inside of the sewing machine and directly below the opening with respect to the inlet, and has a larger surface area than the opening area of the inlet. A sewing machine oiling mechanism characterized by being provided.   The lower end portion of the facing surface of the facing member is positioned below the height position of the oil surface when the amount of lubricating oil stored in the oil container is the minimum amount necessary for driving the sewing machine. The oiling mechanism for a sewing machine according to claim 1, wherein   The sewing machine oil supply mechanism according to claim 2, wherein the facing member protrudes upward from a bottom portion of the oil container. The sewing machine is switched between a standing state in which a pedestal portion standing up from the position of the opening of the bed portion extends in a vertical direction and a tilted state in which the sewing machine tilts in a direction opposite to the injection port with respect to the standing state. Is possible,
When the sewing machine is in the tilted state, lubricating oil can be injected into the oil container through the inlet,
The upper end portion of the facing surface of the facing member at least intersects with an imaginary line that connects the inner side edge of the sewing machine and the edge of the opening with a straight line. 4. The oil supply mechanism for the sewing machine according to any one of items 1 to 3. The oil container is fixed to the bed part,
The sewing machine oil supply mechanism according to any one of claims 1 to 4, wherein the injection port opens on a side surface of the bed portion above the oil container. In the oil container of the sewing machine that is provided on the upper surface of the bed portion of the sewing machine and stores the lubricating oil
The oil container is located below the opening that opens on the upper surface of the bed part, and the upper part is open,
The refueling object is located above the opening,
The lubricating oil supplied to the oil supply object is dropped into the oil container through the opening,
With respect to the inlet provided in the sewing machine at a position below the opening and above the height of the oil level of the lubricating oil stored in the oil container, the inside of the sewing machine and the opening An oil container for a sewing machine provided with a facing member having a facing surface facing the inlet at a position closer to the inlet than directly below and having a surface area larger than an opening area of the inlet.   The lower end portion of the facing surface of the facing member is positioned below the height position of the oil surface when the amount of lubricating oil stored in the oil container is the minimum amount necessary for driving the sewing machine. The oil container for a sewing machine according to claim 6, wherein the oil container is a sewing machine.   8. The sewing machine oil container according to claim 7, wherein the facing member protrudes upward from the bottom. When the sewing machine is in a tilted state in which the pedestal that stands up from the position of the opening of the bed portion tilts in the direction opposite to the injection port with respect to the standing state extending in the vertical direction, through the injection port Lubricating oil can be injected,
The upper end portion of the facing surface of the facing member at least intersects with an imaginary line that connects an inner side edge of the sewing machine of the injection port and an edge of the opening with a straight line. To 8. The sewing machine oil container according to claim An oil supply mechanism that includes an oil container that contains lubricating oil, and a supply mechanism that supplies the lubricating oil contained in the oil container to an oil supply object;
A bed portion for providing the oil container;
In a sewing machine equipped with
The oil container is located below the opening that opens on the upper surface of the bed part, and the upper part is open,
The refueling object is located above the opening,
The lubricating oil supplied to the oil supply object by the supply mechanism is dropped into the oil container through the opening,
The oil supply mechanism is
An injection port provided in the sewing machine at a position below the opening and above the height position of the oil level of the lubricating oil accommodated in the oil container, and communicating the inside and the outside of the sewing machine,
An opposing member having an opposing surface that faces the inlet at a position closer to the inlet than the inside of the sewing machine and directly below the opening with respect to the inlet, and has a larger surface area than the opening area of the inlet. A sewing machine characterized by being provided.

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