JP2016032521A - Oil tank for sewing machine and sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil tank for a sewing machine capable of increasing an amount of a lubrication oil which can be stored in the oil tank without expanding the size of the oil tank in the horizontal direction, and a sewing machine.SOLUTION: A sewing machine 1 has an oil tank 100 on a right end part and a front end side of a bed part 2. The oil tank 100 includes a body part 110 and a swelling part 120. The swelling part 120 is arranged in a lower end part of a leg part 3. A storage chamber 111 of the body part 110 and an evacuation chamber 121 of the swelling part 120 communicate via a communication hole 155. In a standing state of the sewing machine 1, a lubrication oil stays inside the storage chamber 111. In a tilted state of the sewing machine 1, a part of the lubrication oil flows into the evacuation chamber 121. An oil surface of the lubrication oil does not reach the position of an oil supply hole 150 in the vertical direction.SELECTED DRAWING: Figure 14

Description

  The present invention relates to a sewing machine oil tank and a sewing machine that contain lubricating oil for the sewing machine.

  In the sewing machine described in Patent Document 1, an oil tank that supplies oil to the hook is provided in the vicinity of the hook mechanism in the bed portion. The oil tank has an air hole on the upper front side. The oil tank leaves an air layer in the upper part, and the level position where the oil level does not reach the air hole is defined as the full position.

JP 2006-87810 A

  However, there is a desire to increase the amount of oil stored in the oil tank. Since the sewing machine has a plurality of mechanisms such as a shuttle mechanism in the bed portion, it is difficult to expand the size of the oil tank. There are times when the oil is replenished beyond the full position to increase the amount of oil stored in the oil tank. During maintenance, the sewing machine tilts the bed, pedestal, and arm backwards. In this case, the oil tank is inclined and the upper and front corners are arranged on the upper side. Oil beyond the full position could leak out of the air holes.

  An object of the present invention is to provide an oil tank for a sewing machine and a sewing machine that can increase the amount of lubricating oil that can be accommodated in the oil tank without expanding the size of the oil tank in the horizontal direction.

  According to the first aspect of the present invention, a change is made between the standing state in which the pedestal portion standing from the bed portion stands perpendicular to the horizontal plane and the tilted state in which the pedestal portion tilts with respect to the horizontal plane. A sewing machine oil tank that is fixed to the bed portion of a possible sewing machine and contains at least lubricating oil to be supplied to the hook, the first containing portion having a first chamber capable of containing the lubricating oil, and the first An oil supply port for accommodating the lubricating oil in a chamber, and the wall portion constituting the first chamber of the first accommodating portion is open to the first wall portion positioned above in the standing state, A first hole that communicates the first chamber with the outside of the first housing part, a second hole that opens at a position different from the first hole in the first wall part, and the first wall part A second chamber provided on the opposite side of the first chamber and having a second chamber communicating with the first chamber through the second hole; A container portion, and in the tilted state, the second housing portion is positioned in the tilting direction of the pedestal portion with respect to the first housing portion, and the second hole is positioned below the first hole. A sewing machine oil tank is provided.

  The oil tank is assembled to the sewing machine with the first wall portion disposed above the first chamber. During maintenance, the sewing machine is placed with the oil tank tilted. During maintenance, the oil tank has the first hole positioned above the second hole. When the oil tank is inclined, the lubricating oil in the first chamber can flow into the second chamber via the second hole located below the first hole. Therefore, it is not necessary to limit the amount of lubricating oil supplied to the first chamber so that the lubricating oil does not leak from the first hole when the oil tank is inclined. Therefore, the amount of the lubricating oil can be increased without expanding the size of the oil tank in the horizontal direction.

  The oil tank according to the first aspect is one of the wall portions constituting the second chamber of the second housing portion, the second wall portion positioned above in the tilted state, and the first wall portion You may have the inclination part which is a wall part which connects between. The inclined portion may be inclined from the second wall portion, and the second wall portion side end portion may be positioned below the first wall portion side end portion in the inclined state. During maintenance of the sewing machine, the inclined portion is inclined with the first wall portion side facing upward in the inclined state. When the lubricating oil flows into the second chamber from the first chamber, the air in the second chamber can be easily pushed out through the second wall portion and the inclined portion into the first chamber. Therefore, the lubricating oil can surely move into the second chamber so as to fill the second chamber, and does not leak from the first hole.

  In the first aspect, the first wall portion may include an extending portion in which an opening peripheral edge portion of the first hole extends to the opposite side to the first chamber. When the oil tank is inclined, the inner wall of the extending portion is inclined toward the first chamber. When the oil tank is tilted with the lubricating oil filled to the first chamber, the lubricating oil that has entered the extending section travels along the inner wall of the extending section and enters the first chamber from the first hole. Absent.

  The oil tank according to the first aspect is one of the wall portions constituting the first chamber of the first housing portion, and is provided on a third wall portion facing the first wall portion in the first chamber. A third hole opening at a position opposite to the opening position of the second hole with respect to the opening position of the first hole in a plan view, and provided below the first chamber in the standing state, A third housing portion having a third chamber communicating with the first chamber via a third hole, and communicating with the third chamber and the outside of the third housing portion opened to the third housing portion; You may further provide the 4th hole which can attach the transport pipe which transports the said lubricating oil. The oil tank can easily receive the lubricating oil in the third chamber, and can reliably send the lubricating oil to the outside through the fourth hole. In addition, when the oil tank is inclined due to the maintenance of the sewing machine, the position of the third hole that opens to a position opposite to the position on the opposite side of the second hole from the first hole is a position higher than the first hole. Therefore, when the oil tank is inclined, the position of the third hole is higher than the level position of the oil level of the lubricating oil. Accordingly, during maintenance, the first chamber does not supply the lubricant to the third chamber, so the oil tank does not send the lubricant from the fourth hole, and the supply destination mechanism is not covered with the lubricant.

  The oil tank of the first aspect opens to the first wall portion, the first hole, a fifth hole different from the second hole, and the first storage portion from the first chamber through the fifth hole. A gauge rod extending outward, provided at an end of the gauge rod in the first chamber, having a lighter specific gravity than the lubricating oil, and projecting inward from the inner wall of the fifth hole, the gauge You may further provide the some projection part which supports a stick | rod so that a movement is possible. By providing the float in the first chamber, the oil tank can improve the follow-up of the remaining amount display with respect to the change in the remaining amount of the lubricating oil, as compared with the case where the float is provided outside the first chamber. The plurality of protrusions are in contact with the gauge rod to which the lubricant is adhered, and support the gauge rod in the fifth hole. Since the contact area with the protrusion is smaller than the contact area with the inner wall when there is no protrusion, the gauge rod is less likely to adhere to the inner wall of the fifth hole. Therefore, the oil tank can reliably indicate the remaining amount of the lubricating oil.

  In the first aspect, the fifth hole may open at a position opposite to the opening position of the second hole with respect to the opening position of the first hole in the first wall portion. When the oil tank is tilted during maintenance of the sewing machine, the position of the fifth hole that opens to the position opposite to the second hole from the first hole is higher than the first hole. It is higher than the standard position. Therefore, during maintenance, the gauge rod and float can be placed in a state where they are surely floated from the lubricating oil, so the oil tank can expedite the drainage of the gauge rod and float and facilitate smooth maintenance. .

  In the oil tank according to the first aspect, when the first storage portion is fixed to the bed portion of the sewing machine, at least a part of the second storage portion may be located inside the leg pillar portion of the sewing machine. . The oil tank can further increase the capacity of the second chamber. The oil tank can increase the amount of lubricating oil in the first chamber that can flow into the second chamber when tilted, and can suppress the first chamber from projecting below the bed portion.

  According to a second aspect of the present invention, comprising: a bed portion; a pedestal portion standing from the bed portion; and an oil tank that is fixed to the bed portion and contains at least lubricating oil supplied to the hook. In a sewing machine that can change between a standing state in which a pedestal portion stands perpendicular to a horizontal plane and a tilted state in which the pedestal portion tilts with respect to a horizontal plane, the oil tank can store the lubricating oil A first accommodating portion having a first chamber, and an oil supply port for accommodating the lubricating oil in the first chamber, wherein the upright of the wall portions constituting the first chamber of the first accommodating portion A first hole that opens to the first wall portion located above in the state and communicates the first chamber with the outside of the first housing portion, and a position different from the first hole in the first wall portion. A second hole to be opened and provided on the opposite side of the first wall with respect to the first wall, and the second hole A second accommodating portion having a second chamber communicating with the first chamber, and in the tilted state, the second accommodating portion is positioned in the tilting direction of the pedestal with respect to the first accommodating portion. In addition, a sewing machine is provided in which the second hole is located below the first hole.

  The oil tank is assembled to the sewing machine with the first wall portion disposed above the first chamber. During maintenance, the sewing machine is placed with the oil tank tilted. During maintenance, the oil tank has the first hole positioned above the second hole. When the oil tank is inclined, the lubricating oil in the first chamber can flow into the second chamber via the second hole located below the first hole. Therefore, it is not necessary to limit the amount of lubricating oil supplied to the first chamber so that the lubricating oil does not leak from the first hole when the oil tank is inclined. Therefore, the amount of the lubricating oil can be increased without expanding the size of the oil tank in the horizontal direction.

  2nd aspect WHEREIN: When the said 1st accommodating part is fixed to the said bed part, the said oil tank WHEREIN: At least one part of said 2nd accommodating part may be located inside the said pedestal part. The oil tank can further increase the capacity of the second chamber. The sewing machine can increase the amount that the lubricating oil in the first chamber can flow into the second chamber when the oil tank is inclined, and can suppress the first chamber from protruding below the bed portion.

FIG. 3 is a perspective view in which a bed portion 2 of the sewing machine 1 is partially broken. FIG. 2 is a front view in which a bed portion 2 of the sewing machine 1 is partially broken. It is the perspective view which looked at the oil tank 100 from the upper left front. It is the perspective view which looked at the oil tank 100 from the upper right front. 1 is a front view of an oil tank 100. FIG. 1 is a plan view of an oil tank 100. FIG. 2 is a left side view of the oil tank 100. FIG. 2 is a right side view of the oil tank 100. FIG. 2 is a rear view of the oil tank 100. FIG. 2 is a bottom view of the oil tank 100. FIG. It is sectional drawing of the oil tank 100 seen in the arrow direction by the BB line of FIG. It is sectional drawing of the oil tank 100 seen in the arrow direction by the AA line of FIG. FIG. 3 is a right side view in which the sewing machine 1 in a standing state is partially broken. FIG. 2 is a right side view in which the sewing machine 1 in a tilted state is partially broken.

  An embodiment of the present invention will be described with reference to the drawings. A schematic configuration of the sewing machine 1 will be described with reference to FIGS. 1 and 2. 1 are the left side, right side, front side, rear side, upper side, and lower side of the sewing machine 1, respectively.

  As shown in FIGS. 1 and 2, the sewing machine 1 includes a machine casing 9. The machine frame 9 supports various mechanisms for driving the sewing machine 1. The sewing machine 1 includes a bed 2, a pedestal 3, an arm 4, and a tip 5. The bed portion 2 extends in the left-right direction, and includes a lower shaft (not shown), a hook mechanism 20, an oil supply mechanism 10, and the like. The upper surface of the bed part 2 is a plane. The bed 2 is mounted on a table 15 (see FIG. 2). The pedestal 3 extends upward from the right end of the bed 2 and includes a timing belt, a sewing motor, etc. (not shown) inside. The arm part 4 extends from the upper side of the pedestal part 3 to the left side. The arm portion 4 faces the upper surface of the bed portion 2 and includes a main shaft (not shown) and the like inside. The arm part 4 includes a tip part 5 on the left side. The tip portion 5 includes a balance drive mechanism, a needle bar drive mechanism, and the like (not shown).

  The main shaft in the arm portion 4 has a right end connected to the sewing machine motor of the pedestal column portion 3 and a left end connected to the balance drive mechanism and the needle bar drive mechanism of the tip portion 5. The sewing machine motor rotates the main shaft and transmits a driving force to the needle bar vertical movement mechanism and the balance driving mechanism. The needle bar drive mechanism includes a needle bar (not shown) and moves the needle bar up and down. A needle bar (not shown) is attached to the lower end of the needle bar. The needle bar drive mechanism moves the needle bar and the sewing needle up and down. The balance drive mechanism includes a balance (not shown) and moves the balance up and down.

  The lower shaft in the bed portion 2 extends in the left-right direction. The lower shaft is connected to the main shaft via the timing belt of the pedestal 3. The shuttle mechanism 20 in the bed portion 2 includes a rotary shuttle (not shown), a plunger pump 21, a shuttle shaft 22, and the like. The lower shaft is connected to the shuttle shaft 22 through a gear (not shown). The hook shaft 22 connects the rotary hook to the left end. The sewing machine motor rotates the shuttle shaft 22 and the rotary shuttle via the timing belt and the lower shaft. A bobbin case (not shown) that houses a bobbin (not shown) around which a lower thread is wound is attached to the rotary hook. The rotary hook cooperates with the sewing needle, and entangles the lower thread pulled out from the bobbin case with the upper thread held by the sewing needle. The balance raises the upper thread entangled with the lower thread onto a needle plate (not shown) provided on the upper surface of the bed 2 and forms a seam on the work cloth.

  The oil supply mechanism 10 supplies lubricating oil to the shuttle mechanism 20 and a needle bar drive mechanism (not shown). The oil supply mechanism 10 includes an oil tank 100, transport pipes 91, 92, 93, and an oil supply pipe 94. The oil tank 100 is provided fixed to the right end portion and the front end side (see FIG. 13) in the bed portion 2. A part of the oil tank 100 (a bulging portion 120 described later) is provided in the lower end portion of the pedestal column portion 3.

  The transport pipes 91 and 92 are piped to the lower part of the bed part 2 and connect the plunger pump 21 of the shuttle mechanism 20 and the oil tank 100. The plunger pump 21 is a plunger-type oil supply pump and supplies lubricating oil to a rotary hook (not shown) via a hook shaft 22. The transport pipe 91 transports lubricating oil supplied from the oil tank 100 to the plunger pump 21. The transport pipe 92 collects the lubricating oil from the plunger pump 21 and transports it to the oil tank 100. The transport pipe 93 is piped in the pedestal 3 and the arm 4 to connect the needle bar drive mechanism and the oil tank 100. The transport pipe 93 has a wick (not shown) inserted therethrough. The oil tank 100 supplies lubricating oil to the needle bar drive mechanism by wick fueling using the capillary action of the wick. The oil supply pipe 94 is piped into the pedestal 3, and connects the oil supply port 31 that opens to the front wall of the pedestal 3 and the oil tank 100. The pedestal part 3 opens a window part 32 under which the position of the gauge rod 162 (see FIG. 3) can be confirmed from the outside below the fuel filler port 31.

  The configuration of the oil tank 100 will be described with reference to FIGS. As will be described later, the sewing machine 1 is used in a standing state in which the pedestal portion 3 stands vertically with respect to the upper surface of the table 15 during normal use. During the maintenance, the sewing machine 1 is tilted so that the pedestal 3 is tilted with respect to the upper surface of the table 15. In the standing state, the oil tank 100 has an upper wall portion 112 (see FIG. 3) positioned above the storage chamber 111 (see FIG. 5). In the tilted state of the oil tank 100, the front wall portion 113 (see FIG. 3) is positioned above the storage chamber 111. The configuration of the oil tank 100 described below is based on the orientation when the sewing machine 1 is in the standing state.

  As shown in FIGS. 3 to 10, the oil tank 100 includes a main body portion 110, a bulging portion 120, and an oil feeding portion 130. The main body 110 is a box having a storage chamber 111 that can store lubricating oil therein. The shape of the main body 110 is a substantially rectangular shape that is long in the left-right direction when viewed from the front and a substantially rectangular shape that is long in the front-rear direction when viewed from the side. The bulging portion 120 is a box having a retreat chamber 121 that can contain lubricating oil. The bulging portion 120 is integrally provided on the upper rear side of the main body 110 and protrudes upward from the main body 110. The evacuation chamber 121 of the bulging portion 120 communicates with the storage chamber 111 of the main body portion 110. The oil feeding section 130 is a box having an oil feeding chamber 131 that can contain lubricating oil. The oil feeding unit 130 is integrally provided at the front lower portion of the main body 110 and protrudes downward from the main body 110. The oil feeding chamber 131 of the oil feeding unit 130 communicates with the storage chamber 111 of the main body 110.

  The main body 110 includes an upper wall part 112, a front wall part 113, a left wall part 114, a first right wall part 115, a second right wall part 116, a first rear wall part 117, which constitute a wall part of the housing chamber 111. A second rear wall portion 118 and a bottom wall portion 119 are provided. The upper wall portion 112 and the bottom wall portion 119 are substantially L-shaped wall portions, respectively. The front wall portion 113, the left wall portion 114, the first right wall portion 115, the second right wall portion 116, the first rear wall portion 117, and the second rear wall portion 118 are substantially rectangular wall portions. The storage chamber 111 includes a first storage chamber 140 and a second storage chamber 145. The first storage chamber 140 has a box shape that is long in the left-right direction. The second storage chamber 145 has a box shape whose length in the left-right direction is shorter than that of the first storage chamber 140. The second storage chamber 145 is disposed on the left rear end side of the first storage chamber 140 and communicates with the first storage chamber 140. The wall portion of the first storage chamber 140 includes a part of the upper wall part 112, a part of the front wall part 113, a part of the left wall part 114, a first right wall part 115, a first rear wall part 117, and a bottom wall part 119. Consists of a part. The wall portion of the second storage chamber 145 includes a part of the upper wall part 112, a part of the left wall part 114, a second right wall part 116, a second rear wall part 118, and a part of the bottom wall part 119. .

  Upper wall part 112 opens oil supply hole 150 in a portion extending in the left-right direction on the front side in the front-rear direction of L-shape. The oil supply hole 150 is located on the front side of the bulging portion 120. The oil supply hole 150 is an oil supply port for storing lubricating oil in the storage chamber 111 and communicates with the first storage chamber 140 of the storage chamber 111 and the outside. The peripheral edge of the opening of the oil supply hole 150 forms a tubular guide portion 151 that extends to the opposite side, that is, to the upper side of the storage chamber 111. The guide portion 151 communicates with the oil supply hole 150 and has an upper end portion opened. The guide 151 guides one end of the oil supply pipe 94 (see FIG. 1) to the oil supply hole 150. The other end of the oil supply pipe 94 is connected to the oil supply port 31 of the pedestal 3.

  The upper wall part 112 opens the communication hole 155 in the part extended in the front-back direction back side among L shapes. The communication hole 155 communicates the second storage chamber 145 in the storage chamber 111 of the main body 110 and the retracting chamber 121 of the bulging portion 120. The bulging portion 120 covers the communication hole 155 from above. The bulging portion 120 has a substantially rectangular shape that is long in the vertical direction when viewed from the front, and has a trapezoidal shape whose lower side is longer in the front-rear direction than the upper side when viewed from the side. The bulging portion 120 includes an upper wall portion 122, a front wall portion 123, a left wall portion 124, a right wall portion 125, a first rear wall portion 126, a second rear wall portion 127 that constitute the wall portion of the evacuation chamber 121, an inclination A wall 128 is provided.

  The upper wall portion 122 is a rectangular wall portion extending in the left-right direction, and is provided above the communication hole 155. The front wall portion 123 is a wall portion having wall surfaces in the front-rear direction, and extends from the front side of the upper wall portion 122 toward the lower side. The inclined wall portion 128 extends downward from the lower side of the front wall portion 123 and is inclined forward. The inclined wall portion 128 is connected to the upper wall portion 112 of the main body portion 110 at the opening peripheral edge portion on the front side of the communication hole 155. The front wall portion 123 and the inclined wall portion 128 constitute a front wall portion of the evacuation chamber 121.

  The first rear wall 126 extends from the right side of the rear side of the upper wall 122 toward the lower side and is inclined rearward. The first rear wall portion 126 is connected to the upper wall portion 112 of the main body portion 110 at the opening peripheral edge portion on the right rear side of the communication hole 155. The second rear wall portion 127 extends straight from the left side of the rear side of the upper wall portion 122 to the lower side. The surface of the second rear wall 127 is curved inward. The bulging portion 120 has a substantially L shape that matches the curved shape of the second rear wall portion 127 in plan view. The second rear wall portion 127 is connected to the upper wall portion 112 of the main body portion 110 at the opening peripheral edge portion on the rear left side of the communication hole 155.

  The left wall portion 124 and the right wall portion 125 are wall portions having wall surfaces in the left-right direction, respectively. The left wall portion 124 extends from the left side of the upper wall portion 122 toward the lower side. The right wall portion 125 extends from the right side of the upper wall portion 122 toward the lower side. The lower side of each of the left wall portion 124 and the right wall portion 125 is connected to the upper wall portion 112 of the main body portion 110 at the opening peripheral edge portions on the left side and the right side of the communication hole 155.

  The upper wall 112 of the main body 110 opens a detection hole 160 on the right front side of the oil supply hole 150. The detection hole 160 is located on the upper wall portion 112 on the opposite side of the communication hole 155 with respect to the oil supply hole 150. The opening peripheral edge of the detection hole 160 forms a tubular guide portion 163 that extends to the opposite side, that is, the upper side of the accommodation chamber 111.

  The detection hole 160 and the guide portion 163 are inserted through a gauge rod 162 extending in the vertical direction. The gauge rod 162 is provided with a float 161 at the lower end. The float 161 is lighter than the lubricating oil and floats on the oil surface. The bottom wall portion 119 includes a plurality of guide protrusions 141 extending upward in the accommodation chamber 111. The plurality of guide protrusions 141 guide the float 161 inside the enclosure. The float 161 moves up and down on the inner side surrounded by the guide protrusion 141 in accordance with the remaining amount of the lubricating oil in the storage chamber 111. The gauge bar 162 moves up and down in the guide portion 163 as the float 161 moves. The inner diameter of the guide portion 163 is larger than the outer diameter of the gauge rod 162. The guide part 163 includes four protrusions 164 that protrude inward from four circumferential positions on the upper end of the inner wall. The tip of each of the protrusions 164 is positioned at the center of the guide portion 163 in the radial direction, and positions the gauge rod 162 at the center of the guide portion 163 and supports it in a movable manner. The upper end portion of the gauge rod 162 protrudes above the upper end of the guide portion 163. When the oil tank 100 is fixed to the bed part 2, the sewing machine 1 arranges the upper end part of the gauge bar 162 at a position that can be confirmed from the outside through the window part 32 (see FIG. 1) of the pedestal part 3. The gauge bar 162 reports the remaining amount of lubricating oil stored in the storage chamber 111 according to the position of the upper end portion with respect to the window portion 32.

  The upper wall 112 opens a maintenance hole 165 (see FIG. 4) on the right side of the detection hole 160. The maintenance hole 165 is a work hole for removing foreign matters mixed in the lubricating oil during maintenance of the sewing machine 1. The oil tank 100 has a stopper member 166 attached to the maintenance hole 165 when the sewing machine 1 is normally used. The plug member 166 closes the maintenance hole 165 from above.

  The upper wall portion 112 opens a supply port 170 on the rear side of the maintenance hole 165. The opening periphery of the supply port 170 forms a tubular guide portion 171 extending upward. The guide part 171 connects one end of the transport pipe 93. The other end of the transport pipe 93 is disposed in the vicinity of a needle bar drive mechanism (not shown). One end of the wick (not shown) provided inside the transport tube 93 is disposed in the first storage chamber 140 through the supply port 170. The inner diameter of the supply port 170 is substantially the same as the outer diameter of the wick. The wick supplies lubricating oil in the first storage chamber 140 from the supply port 170 to the needle bar drive mechanism by wick fueling.

  The upper wall portion 112 forms a slit 172 having a width substantially the same as the outer diameter of the wick between the maintenance hole 165 and the supply port 170. The slit 172 has one end connected to the maintenance hole 165, extends in a direction away from the maintenance hole 165, and connects to the supply port 170. One end side of the wick is formed with a knot, and the knot is inserted into the first storage chamber 140 from the maintenance hole 165 and disposed in the supply port 170 through the slit 172. The knot of the wick is larger than the inner diameter of the supply port 170. Therefore, the knot of the wick prevents the wick from coming out of the supply port 170. The plug member 166 that closes the maintenance hole 165 prevents the wick from coming out of the maintenance hole 165 via the slit 172.

  The bottom wall portion 119 opens a communication hole 175 at the right end. The oil feeding section 130 covers the communication hole 175 from below. The oil feeding section 130 has a curved lower wall portion and extends in the left-right direction. The oil feeding section 130 is a substantially cylindrical body having an oil feeding chamber 131 capable of feeding lubricating oil therein. The communication hole 175 communicates the first storage chamber 140 of the storage chamber 111 and the oil feeding chamber 131 of the oil feeding section 130. The oil feeding part 130 opens a supply hole 133 in the left wall part 132 on the left side. The supply hole 133 communicates between the oil feeding chamber 131 and the outside. The oil feeding section 130 is provided with a joint 134 for connecting the transport pipe 91 (see FIG. 2) in the supply hole 133.

  The bottom wall portion 119 opens a discharge port 180 at the rear end portion on the second rear wall portion 118 side (see FIG. 12). The discharge port 180 communicates the second storage chamber 145 of the storage chamber 111 with the outside. The discharge port 180 is a hole for discharging the lubricating oil in the storage chamber 111 to the outside of the oil tank 100 during maintenance of the sewing machine 1. The bottom wall portion 119 is provided with a flow path plate 185 on the outer wall side of the discharge port 180. The flow path plate 185 extends along the bottom wall portion 119. The flow path plate 185 is a plate-like member whose length in the extending direction from the base end portion 186 to the distal end portion 187 is longer than the length in the width direction orthogonal to the extending direction. The flow path plate 185 has a base end portion 186 at the discharge port 180. The flow path plate 185 has the distal end portion 187 disposed on the rear side of the base end portion 186 with the extending direction directed in the front-rear direction. The flow path plate 185 is disposed with the width direction directed in the left-right direction, and extends in parallel with the bottom wall portion 119 from the proximal end portion 186 toward the distal end portion 187.

  The base end portion 186 of the flow path plate 185 communicates the opening of the discharge port 180 over the entire circumference. That is, the discharge port 180 also opens to the base end portion 186 of the flow path plate 185. The distal end portion 187 is located on the rear side of the main body portion 110. The flow path plate 185 includes a pair of restricting portions 188 that protrude downward and extend in the extending direction (front-rear direction) at both ends in the width direction (left-right direction). The pair of restriction portions 188 extend from the base end portion 186 side to the tip end portion 187. By providing the pair of restricting portions 188, the channel plate 185 forms a groove-shaped channel between the base end portion 186 and the tip end portion 187 with the opening facing downward. The flow path plate 185 includes a protruding portion 189 that protrudes upward at the tip end portion 187. The protrusion 189 connects the rear surface to the lower surface of the flow path plate 185. During normal use of the sewing machine 1, the oil tank 100 closes the discharge port 180 by fastening a screw 184 having an O-ring (not shown) on the screw neck to the discharge port 180.

  The bottom wall portion 119 includes a fixing portion 102 that extends to the left side in parallel with the bottom wall portion 119 and opens the through hole 101 in the vertical direction at the left end portion. The oil tank 100 includes a fixing portion 104 that opens the through hole 103 vertically between the second right wall portion 116 and the first rear wall portion 117. The oil tank 100 is fixed to the bed part 2 by fastening a fixing screw (not shown) passed through the through holes 101 and 103 to the machine frame 9 of the bed part 2.

  A connecting portion between the front wall portion 113 and the left wall portion 114 forms a recess 190 having a shape in which a part in the vertical direction is recessed in the storage chamber 111. Of the wall portions constituting the recess 190, the side wall portion 191 having a wall surface in the left-right direction opens a recovery hole 192 at the lower end portion. The collection hole 192 communicates with the first storage chamber 140 and the outside. In the recess 190, a joint 193 that connects the transport pipe 92 (see FIG. 2) is provided in the recovery hole 192.

  The upper wall portion 112, the front wall portion 113, the first rear wall portion 117, and the bottom wall portion 119 are arranged on the inner wall surface of the first storage chamber 140 on the left side of the formation position of the communication hole 175 of the bottom wall portion 119. Fixing portions 105 (see FIG. 5) for fixing (not shown) are provided. The filter removes foreign matters and the like from the lubricating oil traveling from the first storage chamber 140 to the oil feeding chamber 131 when the sewing machine 1 is normally used. The operator can take out the foreign matter or the like removed from the lubricating oil by the filter from the maintenance hole 165.

  As shown in FIGS. 1 and 2, the oil tank 100 having the above-described configuration is provided on the right end portion and the front end side (see FIG. 13) in the bed portion 2. The oil tank 100 is fixed in the bed portion 2 in such a direction that the upper wall portion 112 is disposed on the upper side of the storage chamber 111 and the oil supply hole 150 is disposed on the front side of the communication hole 155 when the sewing machine 1 is standing. To do. The bulging portion 120 has a part on the upper side arranged in the lower end portion of the pedestal column portion 3. In the oil tank 100, since the bulging portion 120 is arranged in the pedestal column portion 3, it is not necessary to arrange the main body portion 110 and the bulging portion 120 in a limited space in the bed portion 2. It can suppress that 110 protrudes below the bed part 2. FIG. The oil tank 100 can increase the capacity of the evacuation chamber 121 of the bulging portion 120. The oil tank 100 can increase the amount of lubricating oil flowing from the storage chamber 111 of the main body 110 arranged in the bed portion 2 into the retraction chamber 121 of the bulging portion 120 when the sewing machine 1 is tilted.

  As shown in FIG. 13, during normal use of the sewing machine 1, the pedestal 3 is erected vertically with respect to the horizontal surface of the table 15, and the sewing machine 1 is in an erected state. The upper wall portion 112 of the main body portion 110 is located above the accommodation chamber 111. Lubricating oil accumulates in the storage chamber 111 of the main body 110 with the bottom wall 119 on the lower side. The oil supply hole 150 is located above the storage chamber 111. The guide portion 151 protrudes upward from the opening peripheral edge portion of the oil supply hole 150. Therefore, the lubricating oil does not leak from the oil supply hole 150 even if the oil level of the lubricating oil is located near the upper wall portion 112 in the storage chamber 111.

  The screw 184 closes the discharge port 180 provided in the bottom wall portion 119. Therefore, the lubricating oil does not leak from the discharge port 180. In the standing state, the bulging portion 120 is located above the main body portion 110. That is, the evacuation chamber 121 is located above the storage chamber 111. The oil feeding chamber 131 of the oil feeding unit 130 is located below the first housing chamber 140 in the housing chamber 111. The lubricating oil smoothly flows from the storage chamber 111 into the oil feeding chamber 131 through the communication hole 175. Therefore, the oil feeding section 130 can reliably send the lubricating oil from the supply hole 133 to the plunger pump 21 (see FIG. 1) of the shuttle mechanism 20 through the transport pipe 91. The wick (not shown) is immersed in the lubricating oil, and the lubricating oil in the storage chamber 111 is reliably supplied to the needle bar drive mechanism (not shown) by the wick filling.

  The float 161 floats on the oil surface of the lubricating oil, and the gauge rod 162 is arranged at a position corresponding to the remaining amount of the lubricating oil in the vertical direction. By providing the main body 110 with the float 161 and the gauge rod 162, the oil tank 100 can follow the change in the position of the upper end of the gauge rod 162 with respect to the change in the remaining amount of the lubricant, that is, follow the indication of the remaining amount of the lubricant. Can increase the sex. The protrusion 164 provided in the guide portion 163 of the detection hole 160 (see FIG. 6) through which the gauge rod 162 is inserted supports the gauge rod 162 in a point-contact manner at the radial center of the guide portion 163. For example, when the lubricating oil adheres to the gauge rod 162, the protruding portion 164 prevents the gauge rod 162 from adhering to the inner wall of the guide portion 163. Therefore, the gauge rod 162 can reliably indicate the remaining amount of the lubricating oil.

  As shown in FIG. 14, during maintenance of the sewing machine 1, the sewing machine 1 is tilted around the hinge part 17 provided at the rear part of the bed part 2 so that the front side is on the upper side. The support bar 16 standing on the table 15 supports the rear part of the arm portion 4 of the sewing machine 1, and the sewing machine 1 is in a tilted state in which the pedestal 3 is tilted with respect to the horizontal surface of the table 15. The front wall portion 113 of the main body portion 110 is located above the accommodation chamber 111. The second rear wall portion 118 is located below the accommodation chamber 111. The bulging portion 120 is located in a tilting direction with respect to the storage chamber 111. The tilt direction is a direction in which the vertical direction of the pillar 3 in the standing state is tilted with respect to the horizontal plane of the table 15 in the tilted state. In the tilted state, the sewing machine 1 is tilted by, for example, 60 degrees to 80 degrees with respect to the standing state.

  The communication hole 155 that opens to the rear portion of the upper wall portion 112 in the standing state is located at the lower rear side of the storage chamber 111 in a tilted state. Part of the lubricating oil in the storage chamber 111 passes through the communication hole 155 and flows into the evacuation chamber 121 of the bulging portion 120. Therefore, the level position of the oil level of the lubricating oil in the tilted state is lowered as compared with the case where the retreat chamber 121 is not provided. In the upright state, the oil supply hole 150 positioned on the front side of the communication hole 155 in the upper wall portion 112 is positioned above the communication hole 155 in a tilted state. Since a part of the lubricating oil flows from the storage chamber 111 to the retracting chamber 121, the oil surface of the lubricating oil does not reach the position of the oil supply hole 150 in the vertical direction. Since the oil tank 100 includes the bulging portion 120, the level position of the oil level of the lubricating oil does not become higher than the oil supply hole 150 in a tilted state. Therefore, the oil tank 100 can relax the restriction on the amount of lubricating oil supplied to the storage chamber 111, and increases the storage amount of the lubricating oil without expanding the size of the storage chamber 111 in the horizontal direction as compared with the conventional case. be able to.

  The oil supply hole 150 includes a guide portion 151. The guide portion 151 extends to the opposite side of the storage chamber 111. The vertical position of the oil supply hole 150 in the tilted state is lower than the vertical position of the opening of the guide portion 151. Therefore, when oil is supplied to the oil tank 100 in a standing state, for example, when the lubricating oil fills the storage chamber 111 until the oil level comes into contact with the lower surface of the upper wall portion 112, the lubricating oil is It does not leak from the guide 151 opening.

  The bulging portion 120 includes an inclined wall portion 128. In the tilted state, the inclined wall portion 128 and the front wall portion 123 are located above the retreat chamber 121. When the lubricating oil flows from the storage chamber 111 into the retraction chamber 121, the air in the retraction chamber 121 is pushed through the front wall portion 123 and the inclined wall portion 128 and pushed out into the storage chamber 111. The inclined wall portion 128 is positioned such that the end portion on the upper wall portion 112 side of the storage chamber 111 is higher in the vertical direction than the end portion on the front wall portion 123 side. Since the oil tank 100 includes the inclined wall portion 128, the air in the retreat chamber 121 can be easily pushed out into the storage chamber 111. Therefore, since the lubricating oil can surely move from the inside of the storage chamber 111 into the retreat chamber 121, it does not leak from the oil supply hole 150 in a tilted state.

  The oil tank 100 is provided on the front side of the bed portion 2. Therefore, in the tilted state, the vertical position of the supply hole 133 is higher than the vertical position of the shuttle mechanism 20. The communication hole 175 that connects the first storage chamber 140 and the oil feeding chamber 131 in the storage chamber 111 is positioned on the front side of the oil tank 100 with respect to the communication hole 155 in the standing state. In the tilted state, the communication hole 175 is located above the communication hole 155. Therefore, the vertical position of the communication hole 175 in the tilted state is higher than the level position of the oil level of the lubricating oil. Since the lubricating oil in the oil feeding chamber 131 flows down into the first storage chamber 140, the oil feeding section 130 does not send out the lubricating oil from the supply hole 133 when in the tilted state. Therefore, the shuttle mechanism 20 is not covered with lubricating oil.

  The detection hole 160 (see FIG. 6) through which the gauge rod 162 of the float 161 is inserted is positioned in front of the oil supply hole 150 in the standing state. In the tilted state, the detection hole 160 is located above the oil supply hole 150. Therefore, in the tilted state, the oil tank 100 can reliably arrange the gauge rod 162 and the float 161 at a position higher than the oil level of the lubricating oil, and can speed up the drainage of the gauge rod 162 and the float 161.

  The present invention can be variously modified in addition to the above embodiment. The front wall portion 123 of the bulging portion 120 is a wall portion having a wall surface in the front-rear direction, but may be a wall portion whose lower end side is inclined more forward than the upper end side. The front wall portion 123 and the inclined wall portion 128 may be an integral wall portion. The inclined wall portion 128 may not be provided. In this case, the lower side of the front wall portion 123 may be connected to the upper wall portion 112 of the main body portion 110. The second storage chamber 145 of the main body 110 may have the same length in the left-right direction as the length of the first storage chamber 140. In this case, the length of the evacuation chamber 121 in the left-right direction may be the same as the length of the first storage chamber 140.

  You may form the oil supply hole 150 and the detection hole 160 of the upper wall part 112 in the same position of the front-back direction. That is, the oil supply hole 150 and the detection hole 160 may be formed side by side in the left-right direction. The oil supply hole 150 of the upper wall portion 112 and the communication hole 175 of the bottom wall portion 119 may be formed at the same position in the front-rear direction. The guide part 151 provided in the oil supply hole 150 may not be provided. The number of protrusions 164 provided in the guide part 163 of the detection hole 160 is not limited to four, but may be three, or may be five or more. Although the bulging portion 120 is disposed at a part on the upper side within the lower end portion of the pedestal column portion 3, the entire bulging portion 120 may be disposed within the lower end portion of the pedestal column portion 3.

  The oil feeding unit 130 may not be provided. In this case, for example, a supply hole that communicates the first storage chamber 140 with the outside may be provided in the front wall portion 113, and a joint may be provided in the supply hole to connect to the transport pipe 91 (see FIG. 2). The bottom wall 119 does not need to open the communication hole 175 at the right end.

  The float 161 may not be located inside the enclosure of the plurality of guide protrusions 141 in the storage chamber 111. In this case, if the float 161 and the gauge rod 162 are arranged outside the storage chamber 111 and the upper end portion of the gauge rod 162 can be confirmed via the window portion 32 (see FIG. 1) of the pedestal column portion 3. Good.

  In the present embodiment, the storage chamber 111 corresponds to the “first chamber” of the present invention. The main body part 110 corresponds to a “first housing part”. The upper wall portion 112 corresponds to a “first wall portion”. The oil supply hole 150 corresponds to a “first hole”. The communication hole 155 corresponds to a “second hole”. The evacuation chamber 121 corresponds to a “second chamber”. The bulging portion 120 corresponds to a “second housing portion”. The front wall portion 123 corresponds to a “second wall portion”. The inclined wall portion 128 corresponds to an “inclined portion”. The guide part 151 corresponds to an “extension part”. The bottom wall portion 119 corresponds to a “third wall portion”. The communication hole 175 corresponds to a “third hole”. The oil feeding chamber 131 corresponds to a “third chamber”. The oil feeding section 130 corresponds to a “third housing section”. The supply hole 133 corresponds to a “fourth hole”. The detection hole 160 corresponds to a “fifth hole”.

DESCRIPTION OF SYMBOLS 1 Sewing machine 2 Bed part 3 Leg pillar part 20 Hook mechanism 91 Transport pipe 100 Oil tank 110 Main body part 111 Storage chamber 112 Upper wall part 119 Bottom wall part 120 Swelling part 121 Retreat chamber 123 Front wall part 128 Inclined wall part 130 Oil supply Part 131 Oil feeding chamber 133 Supply hole 150 Oil supply hole 151 Guide part 155 Communication hole 160 Detection hole 161 Float 162 Gauge rod 164 Projection part 175 Communication hole

Claims (9)

It is fixed to the bed portion of the sewing machine that can change between a standing state in which the pedestal portion standing upright from the bed portion stands perpendicular to the horizontal plane and a tilted state in which the pedestal portion tilts with respect to the horizontal plane. An oil tank for a sewing machine that contains at least lubricating oil to be supplied to the hook,
A first accommodating portion having a first chamber capable of accommodating the lubricating oil;
It is an oil supply port for accommodating the lubricating oil in the first chamber, and is open to the first wall portion positioned above in the standing state among the wall portions constituting the first chamber of the first accommodating portion. And a first hole that communicates the first chamber with the outside of the first housing portion,
A second hole opening at a position different from the first hole in the first wall,
A second housing portion provided on the opposite side of the first chamber with respect to the first wall portion, and having a second chamber communicating with the first chamber through the second hole;
The sewing machine characterized in that, in the tilted state, the second housing portion is positioned in the tilting direction of the pedestal portion with respect to the first housing portion, and the second hole is positioned below the first hole. Oil tank. A wall portion that is one of the wall portions constituting the second chamber of the second housing portion and connects between the first wall portion and the second wall portion positioned above in the tilted state. Having an inclined portion that is
The said inclined part inclines from said 2nd wall part, and the 2nd wall part side edge part is located below rather than the 1st wall part side edge part in the said inclination state. Oil tank for sewing machine.   3. The oil tank for a sewing machine according to claim 1, wherein the first wall portion includes an extending portion in which an opening peripheral edge portion of the first hole extends to a side opposite to the first chamber. The first housing portion is one of the wall portions constituting the first chamber, and is provided on a third wall portion facing the first wall portion in the first chamber, and the first hole in a plan view. A third hole opening at a position opposite to the opening position of the second hole with respect to the opening position of
A third housing portion provided below the first chamber in the upright state and having a third chamber communicating with the first chamber through the third hole;
And further comprising a fourth hole that opens to the third housing portion, communicates the third chamber and the outside of the third housing portion, and can be attached with a transport pipe for transporting the lubricating oil. The oil tank for sewing machines according to any one of claims 1 to 3. A first hole, a fifth hole different from the second hole,
A gauge rod extending from the first chamber to the outside of the first housing portion through the fifth hole;
Provided at the end of the gauge rod in the first chamber, a float having a lighter specific gravity than the lubricating oil,
The sewing machine according to any one of claims 1 to 4, further comprising a plurality of protrusions provided so as to protrude inward from the inner wall of the fifth hole and movably supporting the gauge rod. Oil tank.   The said 5th hole opens in the said 1st wall part in the position on the opposite side to the opening position of the said 2nd hole with respect to the opening position of the said 1st hole. Sewing machine oil tank.   The at least one part of said 2nd accommodating part is located inside the said pedestal part of the said sewing machine when the said 1st accommodating part is fixed to the said bed part of the said sewing machine, The Claim 1 to 6 characterized by the above-mentioned. The oil tank for a sewing machine according to any one of the above. The bed section,
A pedestal portion standing from the bed portion;
An oil tank that is fixed to the bed portion and contains at least lubricating oil supplied to the hook;
In a sewing machine capable of changing between a standing state in which the pedestal portion stands perpendicular to a horizontal plane and a tilted state in which the pedestal portion tilts with respect to a horizontal plane,
The oil tank is
A first accommodating portion having a first chamber capable of accommodating the lubricating oil;
It is an oil supply port for accommodating the lubricating oil in the first chamber, and is open to the first wall portion positioned above in the standing state among the wall portions constituting the first chamber of the first accommodating portion. And a first hole that communicates the first chamber with the outside of the first housing portion,
A second hole opening at a position different from the first hole in the first wall,
A second housing portion provided on the opposite side of the first chamber with respect to the first wall portion, and having a second chamber communicating with the first chamber through the second hole;
The sewing machine characterized in that, in the tilted state, the second housing portion is positioned in the tilting direction of the pedestal portion with respect to the first housing portion, and the second hole is positioned below the first hole. .   9. The sewing machine according to claim 8, wherein the oil tank has at least a part of the second storage portion located inside the pedestal portion when the first storage portion is fixed to the bed portion. 10. .

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