JP2006296782A - Lubricating mechanism of sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating mechanism of a sewing machine capable of stably feeding lubricant. <P>SOLUTION: This lubricating mechanism 100 of the sewing machine is provided with an oil pan 10 as a lubricant storage part storing the lubricant to be fed to respective parts of the sewing machine 200, an oil feed pump 20 as a carrier means, interlocked with the driving of the sewing machine 200 and carrying the lubricant to be stored in the oil pan 10, an arm shaft 30, or a rotary shaft, being fed with the lubricant in its inside by an oil feed pump 20, a feed channel 40 communicated with the inside of the arm shaft 30 and feeding the lubricant to the oil feed portions, a first oil wick member 50a and a second oil wick member 50b feeding the lubricant to oil feeding portions from the arm shaft 30 using a capillary phenomenon. A problem that an excessive amount of oil is fed when the sewing machine is stopped can be solved by feeding the oil from a first discharge hole 33 formed in the arm shaft 30 at one end of the first oil wick member 50a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an oil supply mechanism for a sewing machine that supplies a lubricant to each part of the sewing machine from an oil pan below the sewing machine.

In general, a sewing machine is provided with a needle up-and-down moving mechanism that gives a vertical reciprocating motion to a needle bar provided with a needle, and supplies a lubricant that enables a smooth operation of the needle up-and-down moving mechanism. A refueling mechanism is provided.
As this oil supply mechanism, there is known a machine oil supply device that includes a storage part for storing a lubricant and supplies the lubricant to each part of the sewing machine through an oil core having one end immersed in the lubricant stored in the storage part. (For example, refer to Patent Document 1). Further, there is known a sewing machine oil supply device that supplies lubricant stored in a storage portion to each part of the sewing machine by a pump that uses a rotating sewing machine main shaft as a drive source (see, for example, Patent Document 2).
Japanese Utility Model Publication No. 44-15237 Japanese Patent Laid-Open No. 08-164288

  However, in the conventional sewing machine oil supply mechanism shown in Patent Document 1, since the lubricant is always supplied without being driven and moved, the lubricant is stopped even when the sewing machine is stopped and sewing is not performed. Is supplied. For this reason, there is a problem that an excessive amount of lubricant is supplied to the tip of the arm portion located above the sewing position, and the sewing product may be soiled. Moreover, in the oil supply mechanism of the sewing machine shown in the above-mentioned Patent Document 2, since the drive source of the pump that is the conveying means for conveying the lubricant is interlocked with the driving of the sewing machine, for example, when the sewing machine is operated at high speed There is a problem that the amount of lubricant supplied becomes excessive, and that the amount of lubricant supplied is insufficient when operating at low speed.

  An object of the present invention is to provide an oil supply mechanism for a sewing machine that can stably supply a lubricant.

  In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a lubricant reservoir that stores a lubricant supplied to each part of the sewing machine, and a lubricant reservoir that is interlocked with the drive of the sewing machine. Conveying means for conveying the lubricant to be conveyed, a rotating shaft to which the lubricant is supplied by the conveying means, and supplying the lubricant by discharging it to the oil supply location in the sewing machine surface portion in communication with the inside of the rotating shaft Supply hole, a first discharge hole for discharging the lubricant supplied to the inside of the rotating shaft, one end of the supply hole is disposed at any position around the first discharge hole, and the other end is A sewing machine oil supply mechanism comprising: a first oil core member that is disposed so as to be in contact with the oil supply location and that supplies a lubricant to the oil supply location using a capillary phenomenon.

  According to a second aspect of the present invention, in the oiling mechanism for a sewing machine according to the first aspect, the rotation shaft has a second discharge hole, and the rotation shaft is rotated at a position corresponding to the second discharge hole. A support member that is movably supported, and a second oil core member having one end connected to the support member and the other end connected to the oil supply location, and the support member has an inner periphery to an outer periphery. The second oil core member has one end connected to the communication hole.

  The invention according to claim 3 is the oil supply mechanism of the sewing machine according to claim 2, wherein the first oil core member or the second oil core member is wired with knots formed at one or a plurality of locations. It is characterized by being.

  According to a fourth aspect of the present invention, in the oil supply mechanism for a sewing machine according to any one of the first to third aspects, the oil supply portion is a sliding portion between a shaft and a shaft receiving hole, It is provided in a communication hole that communicates from the outside to the receiving hole of the shaft, and an outer end portion is provided with an impregnation member that receives supply of lubricant from the first or second oil core member. .

According to the first aspect of the present invention, the lubricant stored in the lubricant reservoir is transported to the inside of the rotating shaft and supplied to the oil supply location from the supply hole in accordance with the driving of the transport means that is interlocked with the drive of the sewing machine. Is done. In addition, the lubricant conveyed to the inside of the rotary shaft as another supply route is supplied to the oil supply location using the capillary action through the first oil core member as the sewing machine is driven.
When the sewing machine is operated at a high speed, the lubricating oil is mainly supplied from the supply hole to the oil supply location, and the excessive lubricant falls in the middle of the first oil core member, so that excessive supply is avoided. In addition, when the sewing machine is operated at a low speed and the oil supply from the supply hole is reduced or stopped, the capillarity is continued from the first oil core member containing the lubricant to the oil supply location. The lubricant can be supplied. In other words, by supplying the lubricant in combination with the supply hole and the first oil core member, the required amount of lubricant can be stabilized at the oiling location not only during high speed operation but also during low speed operation. Can be supplied.
Further, since the conveying means stops when the sewing machine is stopped, not only the supply of the lubricant from the supply hole but also the supply of the lubricant to the first oil core member is stopped. Therefore, while the sewing machine is stopped, the lubricant is not continuously supplied to the oil supply portion, and the lubricant is always supplied from the oil core member whose one end is immersed in the lubricant reservoir. Compared to a conventional sewing machine oil supply mechanism, the amount of lubricant supplied to the oil supply location after the sewing machine is stopped can be greatly reduced. As a result, it is possible to solve the problem that an excessive amount of lubricant is supplied to the oil supply location while the sewing machine is stopped.
In addition, the first discharge hole formed on the rotation shaft in accordance with the driving of the sewing machine is also rotated in the direction around the shaft, and the lubricant scattered from the first discharge hole to the periphery of the first oil core member. Supplied to one end. Then, a lubricant is supplied from the other end of the first oil core member to the oil supply point using a capillary phenomenon. Accordingly, the lubricant supplied into the rotary shaft as the sewing machine is driven can be quickly supplied to the oil supply location via a route different from the supply hole, and the first oil core member can be used when the sewing machine is stopped. The supply of lubricant to the can be quickly stopped.

  According to the second aspect of the present invention, the lubricant supplied to the inside of the rotary shaft as the sewing machine is driven is also discharged from the second discharge hole and passes through the communication hole formed in the support member. It is supplied to the oil supply location via the oil core member. Thereby, it becomes possible to supply a lubricant to each oil supply location through a supply route different from the supply hole and the first oil core member. Therefore, a plurality of paths for supplying the lubricant to each oil supply location can be secured, and the lubricant can be stably supplied according to the operating speed of the sewing machine.

  According to the invention described in claim 3, the first and second oil core members are formed with knots at one or a plurality of locations, so that the supply of the lubricant becomes duller than other portions, and the fiber density is dense. One or a plurality of portions can be formed, and the amount of lubricant supplied to the oil supply location through the first and second oil core members can be adjusted to an appropriate amount easily and at low cost. . Therefore, the lubricant can be stably supplied to each oil supply location depending on the number of knots, the degree of tightening thereof, and the formation location. Further, the portion where the knot is formed is in a state in which the diameter swells larger than the other portion of the oil core member, so that it can be easily held and locked during wiring inside the sewing machine.

  According to the fourth aspect of the present invention, the lubricant is supplied from the first and second oil core members through the impregnating member to the oil supply portion, that is, the sliding portion between the shaft and the shaft receiving hole. Is done. That is, since the impregnated member that receives the supply of lubricant from the first or second oil core member can hold a predetermined amount of lubricant for a predetermined period, the sliding between the shaft and the shaft receiving hole is difficult. A sufficient amount of lubricant can be stably supplied to the moving part.

  Hereinafter, an embodiment of an oil supply mechanism 100 for a sewing machine according to the present invention will be described in detail with reference to the drawings.

(Overall configuration of the embodiment)
A sewing machine oil supply mechanism 100 (hereinafter referred to as an oil supply mechanism 100) according to the present embodiment is mounted on a so-called lockstitch sewing machine 200 (hereinafter referred to as a sewing machine 200) that performs a main stitch on a cloth that is to be sewn. The main body frame 1 constituting the outer frame of the sewing machine 200 is disposed.
As shown in FIGS. 1 and 2, the sewing machine 200 has a basic configuration for performing a main sewing on a fabric, and includes a sewing motor (not shown) that applies a driving force to each part of the sewing machine 200, and the sewing machine motor. A needle driving mechanism 60 that drives the sewing needle 7 up and down by obtaining a driving force through an upper shaft 30 as a rotating shaft, which will be described later, and a needle driving mechanism 60 that obtains a driving force from the sewing machine motor through the upper shaft 30 on the needle plate 2. An upper feed mechanism 70 for transporting the cloth placed on the sewing machine, and a balance mechanism 80 for pulling up the upper thread in synchronization with the vertical movement of the sewing needle 7.
In the following description, the vertical vertical direction is the Z-axis direction, the longitudinal direction of an arm portion 1c described later of the sewing machine 200 in a state where the sewing machine 200 is installed on the horizontal plane is the Y-axis direction, and parallel to the plate surface of the needle plate 2, The direction orthogonal to the direction is taken as the X-axis direction. Note that the X-axis direction, the Y-axis direction, and the Z-axis direction are orthogonal to each other. The above-described upper feed mechanism feeds the fabric along the X-axis direction.

(Body frame)
The main body frame 1 includes a bed portion 1a disposed on the lower side of the sewing machine 200, a vertical body portion 1b erected from one longitudinal end side of the bed portion 1a, and an upper end side of the vertical body portion 1b. An arm portion 1c extending substantially parallel to the bed portion 1a is provided on the upper side of the bed portion 1a, and has a substantially U-shape when viewed as a whole.

(Needle vertical movement mechanism)
The needle up-and-down moving mechanism 60 is connected to a sewing machine motor (not shown) that is a drive source, and an upper shaft 30 that transmits rotational driving from the sewing motor via a timing belt 61 and a pulley 62, and an upper shaft. A rotating weight 63 and a crank rod 65 are provided as a transmission mechanism that converts 30 rotational driving forces into upper and lower reciprocating driving forces and transmits them to the needle bar 6 that holds the sewing needle 7.

The needle bar 6 is supported so as to be able to reciprocate along the Z-axis direction in a state along the Z-axis direction inside the tip portion of the arm portion 1c, that is, the inside of the surface portion.
On the other hand, the upper shaft 30 is rotatably supported in a state along the Y-axis direction inside the arm portion 1c. The upper shaft 30 is set to a length that covers almost the entire length of the arm portion 1c, and one end portion thereof is connected to the needle bar 6 via the rotary weight 63 and the crank rod 65 described above, and the other end portion thereof is connected to the main body frame 1. A pulley 62 is provided so as to protrude outward.
The rotary weight 63 is rotatably attached to the tip of the upper shaft 30 together with the upper shaft 30. One end of a crank rod 65 is connected to the eccentric part of the rotating weight 63 via a shaft, and a needle bar holder 66 for supporting the needle bar 6 is connected to the other end of the crank rod 65. A connecting portion between the rotating weight 63 and the crank rod 65, that is, a peripheral surface of a shaft that rotatably supports one end of the crank rod 65 with respect to the rotating weight 63, and a crank rod 65 inserted through the shaft. A sliding portion is formed between the inner peripheral surface of the shaft hole. Note that the transmission mechanism is not particularly limited as long as it can convert the rotational motion of the upper shaft 30 into a reciprocating linear motion.

(Upper feed mechanism)
The upper feed mechanism 70 is in contact with the cloth on the needle plate 2 below the tip of the arm portion 1c from above and feeds along the X-axis direction, and a leg-shaped link 71 that supports the upper feed leg 8. A transmission link 72 that transmits the driving force of the reciprocating motion to the leg link 71 by transmitting a swinging force applied from the upper shaft 30 to a three-point link (not shown), and a swinging fulcrum of the three-point link. Supporting link 73.
The above-described components cooperate to give the upper feed leg 8 a reciprocating motion in the vertical direction and the X-axis direction, and the combined movement of the upper feed leg 8 performs an elliptical motion on the needle plate 2. The fabric to be placed is sent.

(Balance mechanism)
The balance mechanism 80 has a lower end rotatably fitted to a shaft 84 supported by the rotary weight 63 of the needle up-and-down moving mechanism 60 described above, and a link balance body 81 having a thread hole through which a needle thread is passed at the tip. And a balance crank 82 that is freely fitted and supported on the sewing machine arm 1 via a shaft and whose tip is pivotally connected to the center portion of the link balance body 81 via a shaft. It is equipped with.
When the upper shaft 30 rotates as the sewing machine 200 is driven, the shaft 84 provided on the rotary weight 63 also rotates around the axis of the upper shaft 30. The rotation of the shaft 84 causes the link balance body 81 to swing about the axis of the shaft 84 and swing about the axis of the shaft 84 by the swing of the balance crank 82 about the balance support shaft 83. And combined movement is given. As a result, the thread hole at the tip of the link balance body 81 moves up and down at a non-uniform speed to control the feeding and picking up of the needle thread.

(Lubrication mechanism)
The oil supply mechanism 100 for the sewing machine according to the present embodiment stores the oil pan 10 as a lubricant reservoir for storing the lubricant supplied to each part of the sewing machine 200 and the oil pan 10 in conjunction with the drive of the sewing machine 200. The oil supply pump 20 as a conveying means for conveying the lubricant to be conveyed, the upper shaft 30 as a rotating shaft to which the lubricant is supplied by the oil supply pump 20, and the oil supply in the sewing machine surface portion communicating with the inside of the upper shaft 30 And a first oil core member 50a and a second oil core member 50b for supplying the lubricant from the upper shaft 30 to the oil supply location using a capillary phenomenon. . Hereinafter, each part will be described in detail.

(Lubricant reservoir)
As shown in FIG. 1 and FIG. 2, the oil pan 10 is formed in a rectangular tray shape, and the longitudinal direction of the bed portion 1 a and the longitudinal direction of the oil pan 10 are parallel to each other. As described above, the bed portion 1a is detachably provided at the bottom. The oil pan 10 stores oil, which is a lubricant supplied to each mechanism unit of the sewing machine 200, and receives an oil leaking from each mechanism unit, that is, a lubricant storage unit in the present embodiment. ing.
A predetermined amount of oil is stored in the oil pan 10, and the lower end of an oil supply pump 20 described later is immersed in this oil.

(Conveying means)
The oil supply pump 20 is provided as a transport unit that supplies oil stored in the oil pan 10 to each mechanism of the sewing machine 200.
A vertical axis 22 is connected to the oil pump 20, and the vertical axis 22 is supported so as to be rotatable along the Z-axis direction in the vertical body portion 1 b. The vertical axis 22 is rotated by obtaining a driving force from the upper shaft 30 via a bevel gear 21 attached to the upper end portion thereof. The oil supply pump 20 is a rotary type and is driven to rotate by a vertical axis 22. One end (lower end) of an oil supply pipe 23 is connected to the oil supply pump 20, and the other end of the oil supply pipe 23 extends into the arm portion 1 c, and the upper shaft 30 is connected to the substantially central portion of the arm portion 1 c. It is connected to a middle metal 31 that is rotatably supported (see FIGS. 1 and 2).
The middle metal 31 has a bore 31b on the inner circumferential side and a communication hole 31a from the outer circumference to the inner circumference of the middle metal 31 and is connected to the other end of the oil supply pipe 23 described above.
That is, when the upper shaft 30 is rotated in conjunction with the sewing machine motor as the sewing machine 200 is driven, the vertical axis 22 connected to the upper shaft 30 via the bevel gear 21 and the oil pump 20 at the lower end thereof are driven. The oil stored in the oil pan 10 is supplied to the inside of the middle metal 31, that is, to the boring 31 b through the oil supply pipe 23.

(Flow path in rotating shaft)
The above-described upper shaft 30 is a long shaft member formed in a substantially cylindrical shape, and a flow path 36 is formed in the inside along the Y-axis direction.
Further, the upper shaft 30 is rotatably supported by the above-described middle metal 31 at a substantially central portion in the arm portion 1c, and an inflow hole 35 is provided at a position facing the inner peripheral surface of the boring 31b of the middle metal 31. Is provided. That is, the oil supplied into the middle metal 31 by the above-described oil supply pump 20 passes through the inflow hole 35 and is supplied to the flow path 36 in the upper shaft 30. That is, the upper shaft 30 is a rotating shaft to which the lubricant is supplied by the conveying means in the present embodiment.

(Supply hole)
The flow path 36 in the upper shaft 30, which is the rotation shaft, is closed on the end side on the pulley 62 side, and the end on the rotating weight 63 side communicates with the flow path 40 formed in the rotating weight 63. Yes.
The flow path 40 is formed from the tip end portion (left end portion in FIG. 2) of the upper shaft 30 to the end face of the rotary weight 63, that is, the end face on the side where the crank rod 65 is connected. The flow path 40 allows oil supplied into the upper shaft 30 by the oil supply pump 20 to pass through the surface portion of the sewing machine 200, that is, to the mechanisms such as the needle up-and-down moving mechanism 60, the upper feed mechanism 70, and the balance mechanism 80 described above. It can be directly supplied, and serves as a supply hole for directly supplying oil to an oil supply point to be described later.
A flow path (not shown) communicating with the flow path 40 is formed inside the balance crank 82 of the balance mechanism 80, and an oil oil is provided at the swing end of the balance crank 82 at the end of the flow path. A supply hole is formed in the surface portion.
Further, the crank rod 65 of the needle drive mechanism 60 is formed with a flow path (not shown) communicating with the flow path 40 in the same manner as the balance crank 82, and a supply hole for scattering oil into the surface portion through the flow path. Is formed.

Further, the upper shaft 30 is formed with first and second discharge holes 33 and 34 for discharging oil supplied therein.
The first discharge hole 33 is provided on the rear side of the above-described middle metal 31, that is, on the right side in FIG. When the upper shaft 30 rotates, the oil supplied to the flow path 36 in the upper shaft 30 is discharged from the first discharge holes 33, and the oil is discharged in the entire circumferential direction around the shaft. ing. An oil supply window 9 is provided on the upper surface of the arm portion 1c at a position facing the first discharge hole 33, and an operator of the sewing machine 200 looks into the oil supply window 9 to look at the discharge hole. The oil discharged from 33 can be confirmed, and it can be confirmed that the oil supply pump 20 is normally driven, the oil is supplied to each mechanism portion, and the like.

  The second discharge hole 34 is provided in the vicinity of the tip portion of the upper shaft 30. That is, the oil that has been supplied from the inflow hole 35 by the oil supply pump 20 and then passed through the flow path 36 to the surface of the sewing machine is transferred from the second discharge hole 34 to the upper shaft before the flow path 40. 30 can be discharged to the outside.

The upper shaft 30 is rotatably supported by a front metal 32 that is a support member at a position corresponding to the second discharge hole 34.
A communication hole 32 a extending from the inner periphery to the outer periphery of the front metal 32 is formed in a part of the peripheral surface of the front metal 32. One end of a second oil core member 50b to be described later is connected to the communication hole 32a. The front metal 32 may be provided with a boring like the middle metal 31.

One end of the first oil core member 50 a is disposed on the rear side (the right side in FIG. 2) inside the sewing machine 200, and the oil discharged from the first discharge hole 33 is applied to supply oil. Is disposed below the upper shaft 30. Further, the other end of the first oil core member is disposed so as to be in contact with an oil supply location described later.
The first oil core member 50a is disposed so as to have an upward slope from the rear side to the front side (the right side to the left side in FIG. 2) of the arm 1c.

One end of the second oil core member 50b is connected to the communication hole 32a of the front metal 32 that is a support member, and the other end is connected to the first oil core member 50a. That is, the oil supplied from the second discharge hole 34 to the second oil core member 50b is supplied to the first oil core member 50a, and the upper feed mechanism 70 is connected to the first oil core member 50a. Oil can be supplied to the balance mechanism 80.
Moreover, the 1st oil core member 50a and the 2nd oil core member 50b are provided with the knot 90a and the bundle wire band 90b as a means to adjust the fiber density in several places (refer FIG. 1). That is, the first oil core member 50a and the second oil core member 50b are formed with a plurality of knots 90a from one end where the oil is supplied to an oil supply location described later. The first oil core member 50a and the second oil core member 50b are fastened and supported by the bundle band 90b to each part in the arm portion 1c at a plurality of locations, and each member constituting an oil supply location described later. It is fastened and fixed so that it can operate integrally.
A first oil core member 50a is attached to the balance mechanism 80 along the upper feed leg 71, the transmission link 72, and the support link 73 that swing, and is attached by a bundle band 90b. The oil is scattered from the member 50a and supplied.

As shown in FIGS. 3 and 4, the connecting portion between the upper feed rod 71 and the two links 72 and 73 of the upper feed mechanism 70 is formed with a shaft receiving hole and is rotated by a step screw as the shaft. Connected as possible. And it is a sliding site | part of a shaft and the receiving hole of a shaft, Comprising: It is provided in the communicating hole 93 communicating from the exterior to the receiving hole of the said shaft, and an outer one end part is said 1st or 2nd oil core member Felt 92 is provided as an impregnating member that receives the supply of lubricant from 50a and 50b.
And this felt 92 is contact | abutted to the knot 90a formed in the 1st or 2nd oil-core member 50a, 50b mentioned above. As a result, oil is supplied to the felt 92 via the first or second oil core members 50a and 50b, and oil is supplied to the sliding portion described above via the felt 92. .

Next, the operation of the sewing machine oil supply mechanism 100 according to the present embodiment will be described in detail with reference to the drawings.
First, the oil supply pump 20 is driven via the upper shaft 30 by driving the sewing machine 200. Then, the oil stored in the oil pan 10 by the drive of the oil pump 20 passes through the oil supply pipe 23 and is supplied from the communication hole 31a of the middle metal 31 to the boring 31b, and further from the inflow hole 35 into the upper shaft 30. It is supplied to the flow path 36.
The oil supplied to the flow path 36, that is, the upper shaft 30, is divided and supplied to the front and rear of the upper shaft 30, that is, to the left and right in FIG.

Here, the oil supplied to one end on the front side of the upper shaft 30, that is, the left side in FIG. 2, passes through the flow path 40 in the rotary weight 63 and passes through the supply holes of the balance crank 82 and the crank rod 65. Directly supplied to each sliding part. Further, a part of the oil supplied to the front side of the upper shaft 30 is discharged from the second discharge hole 34 and is connected to the communication hole 32a of the front metal 32 at one end side of the second oil core member 50b. To be supplied. And the oil supplied to the one end side of the second oil core member 50b is supplied to the other end side of the second oil core member 50b using the capillary phenomenon, and supplied to each oil supply location. Become.
On the other hand, the oil branched to the rear side of the upper shaft 30, that is, the right side in FIG. It is discharged toward. Part of the oil discharged from the first discharge hole 33 is supplied to one end of the first oil core member 50a. And the oil supplied to the one end side of the 1st oil core member 50a is supplied to the other end side of the said 1st oil core member 50a using a capillary phenomenon, and is supplied to each oil supply location. Become.

Here, the operation of the oil supplied via the first oil core member 50a and the second oil core member 50b will be described in more detail.
First, the oil supplied to one end side of the first oil core member 50a is conveyed to the other end side through the first oil core member 50a using the capillary phenomenon as described above. Next, the first oil core member 50a in the present embodiment is fastened and fixed by the bundled band 90b at a plurality of locations, and knots 90a are formed at the plurality of locations, and at the plurality of locations of the first oil core member 50a. The fiber density is adjusted to be condensed. Since the amount of oil passing generally decreases at the location where the fiber density is condensed, the amount of oil supplied to the other end side of the first oil core member 50a depends on the number of the bundled bands 90b and the knots 90a. It is adjusted as appropriate (see FIGS. 3 and 4).
In addition, since the knot 90a of the first oil core member 50a in the present embodiment is disposed so as to be able to contact the felt 92 provided in the communication hole 93 at the oil supply location, they come into contact with each knot 90a. Oil is supplied to the felt 92. As a result, oil is supplied to each sliding portion of each of the oil supply points, that is, the needle up-and-down moving mechanism 60, the upper feed mechanism 70, and the balance mechanism 80 disposed in the sewing machine surface portion through each felt 92. It becomes.
On the other hand, the oil supplied to the one end side of the second oil core member 50b is also made of the second oil core member 50b by utilizing the capillary phenomenon like the oil supplied to the first oil core member 50a. And then conveyed to the other end side. Since the other end of the second oil core member 50b in this embodiment is connected to the first oil core member 50a, the oil supplied to the second oil core member 50b is the first oil core member 50a. And then supplied to each oil supply location in the same manner as the first oil core member 50b.

Next, the oil supply operation when the sewing machine 200 is operated at high speed, low speed, or stopped will be described.
First, when the sewing machine 200 is operated at high speed, oil is supplied to each oil supply location from each supply hole and each oil core member 50a, 50b leading to the flow path 40 as described above.
Next, as the operating speed of the sewing machine 200 becomes lower, the oil is separated in the order of increasing distance from the oil supply pump 20, that is, the flow path 40, the second oil core member 50b, and the first oil core member 50a. The supply of is reduced.
In other words, when the sewing machine 200 is operated at a low speed, first, the supply of oil from the flow path 40 that requires a predetermined pressure to supply oil decreases because the distance from the oil supply pump 20 is long. Next, the oil discharged from the second discharge hole 34 decreases, and the amount of oil supplied through the second oil core member 50b decreases. Since the first discharge hole 33 is close to the inflow hole 35, the first discharge hole 33 is not easily affected by supply shortage, and oil is discharged according to the operation speed until the sewing machine 200 stops. In any case, since the oil is stored in the oil core, it is possible to continuously supply the oil even if the supply amount decreases.
When the sewing machine 200 is stopped, the oil supply pump 20 driven in conjunction with the driving of the sewing machine 200 is stopped, and the oil for the flow path 40, the second oil core member 50b, and the first oil core member 50a is stopped. All supply is stopped.
That is, oil is not supplied to the oil core members 50a and 50b while the sewing machine 200 is stopped, and the oil contained in the oil core members 50a and 50b when the sewing machine 200 stops is not supplied to each oil supply location. As a result, the supply of oil is continued when the sewing machine 200 is stopped and the supply of oil is stopped.

As described above, according to the sewing machine oil supply mechanism 100 according to the present embodiment, it is possible to supply oil stably even with respect to changes in the operation speed, and wasteful oil when the sewing machine 200 is stopped. Supply can be avoided.
Also, by forming a plurality of knots 90a on the first and second oil core members 50a and 50b or fastening them with a bundle band 90b at a plurality of locations, the first and second oil core members 50a and 50b The fiber density can be adjusted, and the amount of oil supplied to the oil supply location through the first and second oil core members 50a and 50b can be adjusted to an appropriate amount.
In addition, a sufficient amount of oil is stably supplied from the first and second oil core members 50a and 50b via the felt 92 to the lubricating portion, that is, the sliding portion between the shaft and the shaft receiving hole. can do. In particular, the knot 90a is very practical because it does not require a dedicated member and can be freely selected.

The oil supply pump 20 only needs to have an anti-total amount of oil that changes according to the driving speed of the sewing machine 200. For example, a plunger pump that is driven by obtaining a driving force from a lower shaft or an upper shaft 30 (not shown). It may be.
Moreover, the 1st oil core member 50a should just be arrange | positioned in the position of the circumference | surroundings along the upper axis | shaft 30, and is not limited to this embodiment. The first oil core member 50 a only needs to be able to receive the supply of oil discharged from the first discharge hole 33 on one end side thereof, and is discharged from the first discharge hole 33. The length from the position where the oil is supplied to the end on the one end side of the first oil core member 50a is not limited.
The second oil core member 50b is connected to the communication line 32a of the front metal 32 at one end thereof and receives supply of oil discharged from the second discharge hole 34, and supplies the oil at the other end side. What is necessary is just to be able to supply to a location. That is, the other end of the second oil core member 50b may be connected to the first oil core member 50a as in the present embodiment, or may be directly connected to the oil supply location.
Further, the position where the first discharge hole 33 is formed is not limited as long as the oil can be supplied to the first oil core member 50a.
Moreover, the 1st or 2nd discharge holes 33 and 34 are not limited to one or two, You may provide three or more.
In the present embodiment, the amount of oil supplied to the oil supply location by the first and second oil core members 50a and 50b is the number of knots 90a of the first and second oil core members 50a and 50b, and the knots. Although it is adjusted according to the fastening strength of 90a, the number of bundled bands 90b, and the fastening strength of the bundled bands 90b, it is not necessarily limited to this. That is, for example, the height of one end of the first oil core member 50a that receives the supply of oil from the first discharge hole 33 and the highest point in the path from the first oil core member 50a to the oil supply location. It is also possible to adjust the amount of oil supplied to the oil supply location via the first and second oil core members 50a and 50b by appropriately adjusting the difference H (see FIG. 5).
Further, instead of the knot 90a, a means for allowing the adjustment amount to be freely adjusted by a member capable of adjusting the fastening amount with respect to the oil core may be used.

1 is a schematic perspective view showing an overall configuration of a sewing machine oil supply mechanism 100 according to the present embodiment. 1 is a front view showing an overall configuration of a sewing machine oil supply mechanism 100 according to the present embodiment. It is the schematic which shows the mode of the oil supply by an oil core member in the oil supply mechanism 100 of the sewing machine which concerns on this embodiment. It is a schematic diagram which shows a mode that the fiber density of the oil core member in this embodiment is adjusted with a bundle band. In the sewing machine oil supply mechanism 100 according to the present embodiment, it is a schematic diagram showing the arrangement of the first oil core member 50a.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body frame 1a Bed part 1b Vertical trunk | drum 1c Arm part 2 Needle plate 6 Needle bar 7 Sewing needle 8 Upper feed leg 9 Oil supply window 10 Oil pan (lubricant storage part)
20 Oil supply pump (conveying means)
21 Bevel gear 22 Vertical axis 23 Lubrication pipe 30 Upper shaft (rotating shaft)
31 Medium metal (support member)
32 Front metal (support member)
33 First discharge hole 34 Second discharge hole 35 Inflow hole 36 Flow path 40 Flow path 50 Oil core 50a First oil core member 50b Second oil core member 60 Needle vertical movement mechanism 61 Timing belt 62 Pulley 63 Rotation Weight 65 Crank rod 66 Needle bar holder 70 Upper feed mechanism 71 Upper feed bar 80 Balance mechanism 81 Link balance body 82 Balance crank 100 Oil supply mechanism 200 Sewing machine

Claims (4)

A lubricant reservoir for storing lubricant supplied to each part of the sewing machine;
Transport means for transporting the lubricant stored in the lubricant storage section in conjunction with the driving of the sewing machine;
A rotating shaft to which a lubricant is supplied by the conveying means;
A supply hole that communicates with the inside of the rotary shaft and discharges and supplies the lubricant to an oil supply location in the sewing machine surface portion;
A first discharge hole for discharging the lubricant supplied into the rotary shaft;
One end thereof is disposed at any position around the first discharge hole and the other end is disposed so as to be in contact with the oil supply location, and a lubricant is supplied to the oil supply location using capillary action. An oil supply mechanism for a sewing machine, comprising: an oil core member. The rotating shaft has a second discharge hole,
A support member that rotatably supports the rotation shaft at a position corresponding to the second discharge hole;
A second oil core member having one end connected to the support member and the other end connected to the oil supply location;
The support member has a communication hole extending from the inner periphery to the outer periphery,
2. The sewing machine oil supply mechanism according to claim 1, wherein one end of the second oil core member is connected to the communication hole. 3.   The oil supply mechanism for a sewing machine according to claim 2, wherein the first oil core member or the second oil core member is wired with knots formed at one or a plurality of locations. The lubrication point is a sliding part between the shaft and the receiving hole of the shaft,
It is provided in a communication hole that communicates from the outside to the receiving hole of the shaft, and an outer end portion is provided with an impregnation member that receives supply of lubricant from the first or second oil core member. The oil supply mechanism for a sewing machine according to any one of claims 1 to 3.

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