KR101388592B1 - Oil tank of sewing machine - Google Patents

Abstract

The oil of the sewing machine can be surely improved in performance by preventing at least one of changing the supply amount of lubricating oil with respect to the sliding part and releasing the lubricating oil from the air escape hole to the outside when tilting the sewing machine main body. Provide a tank.

On the ceiling wall (2U) of the tank body (2), the ceiling cover part (7) having an air chamber (7a) in communication with the internal space (2a) of the tank body (2) is provided so as to protrude, and A reflux port 8 is formed in the ceiling cover portion 7. Also, when the sewing machine main body B is tilted and knocked down, the jet for preventing the lubricant L stored in the tank body 2 from being ejected from the air escape hole 10 to the outside of the tank body 2 is blown out. The stopping wall 12 is provided on the inner surface of the ceiling wall 2U of the tank body 2.

Description

Oil tank of sewing machine {OIL TANK OF SEWING MACHINE}

BRIEF DESCRIPTION OF THE DRAWINGS It is typical sectional drawing which showed the principal part of 1st Embodiment of the oil tank of the sewing machine which concerns on this invention.

2 is a plan view of Fig.

3 is a left side view of Fig.

4 is a cross-sectional view taken along line A-A of FIG. 1 to include an air escape hole in a state in which the sewing machine main body of the oil tank shown in FIG. 1 is tilted down.

5 is a partially enlarged cross-sectional view showing a modification of the jet blocking wall of FIG.

6 is a partially enlarged cross-sectional view showing another modified example of the jet blocking wall of FIG.

7 is a view similar to FIG. 1 showing a main part of a second embodiment of an oil tank of a sewing machine according to the present invention.

8 is a plan view of FIG. 7.

9 is a schematic front view showing the main part of a sewing machine having a conventional oil tank.

10 is a left side view of FIG. 9.

11 is a schematic cross-sectional view showing a main part of an oil tank of a conventional sewing machine.

12 is a plan view of Fig.

FIG. 13 is a left side cross-sectional view of FIG. 11.

FIG. 14 is a cross-sectional view taken along line B-B of FIG. 11 to include an air escape hole in a state where the sewing machine main body of the oil tank shown in FIG. 11 is tilted down.

          Explanation of symbols on the main parts of the drawings

1,1A: oil tank 2: tank body

2a: storage space 3: oil supply port

5: supply port 7: ceiling cover

7a: air chamber 8: reflux port

10: air escape hole 12, 12A, 12B, 22: blowout barrier

21: Ceiling cover part for increase 21a: Storage space for increase

M: sewing machine B: sewing machine body

F: Sewing Machine Frame FB: Sewing Machine Bed

FP: leg pillar L: lubricant

La: Oil plane RL: Hardness center axis

The present invention relates to an oil tank of a sewing machine for storing lubricating oil supplied to a sliding portion of the sewing machine.

Conventionally, in a sewing machine (mainly an industrial sewing machine), an oil supply mechanism for supplying lubricating oil to a sliding portion such as a drum driving mechanism or a needle bar shanghai donggu is provided. As such a lubrication mechanism, the structure which installs the oil pan which stores lubricating oil under the sewing machine bed, and supplies the lubricating oil stored in the oil pan to a sliding site | part by a pump or an oil shim.

In such a sewing machine, it is known that the oil tank which stores lubricating oil is provided in the inside of the sewing machine main body, for example, below the sewing machine bed (for example, refer patent document 1).

Figure 9 shows a conventional sewing machine having an oil tank, the conventional sewing machine (M) is configured so that the sewing machine main body (B) is tilted and knocked down at a predetermined position on the sewing machine table (sewing machine stand; T). It is. The sewing machine frame F of the sewing machine main body B includes a sewing machine bed FB, a sewing machine arm FA extending in parallel with the sewing machine bed FB above the sewing machine bed FB, and a sewing machine bed FB. And the sewing machine arm FA are formed in a substantially U shape having a leg column FP which connects the sewing machine arm FA at the rear end side of the side opposite to the sewing machine head portion which is the free end side of the sewing machine arm FA.

Moreover, the oil tank 101 for storing the lubricating oil supplied with respect to the sliding part of a drum is attached to the inside of the sewing machine main body B, for example. For example, the oil tank 101 is disposed below the sewing machine bed FB, and when the maintenance is performed, as shown by the two-dot chain line in FIG. 10, the oil tank 101 is centered on the hardness central axis RL. It is to fall down with the sewing machine body (B). Moreover, as an arrangement position of the oil tank 101, there exists also a structure arrange | positioned inside the leg post part FP.

11 to 13 are views showing the configuration of an essential part of an example of the conventional oil tank 101, the conventional oil tank 101 is a tank body 102 formed in a horizontally long rectangular parallelepiped shape, for example, hollow inside. The inside has a storage space 102a for storing the lubricating oil L. As shown in FIG. An oil supply port 103 is formed in the lower portion of the right side wall 102R of the tank body 102 to supply lubricating oil L inside the tank body 102, and the oil supply port 103 has a tank. A cylindrical oil supply nozzle 104, which is installed on the outer surface of the right side wall 102R of the main body 102, is provided so that the inner hole 104a communicates with the oil supply port 103. One end of the oil supply pipe having flexibility is connected to the oil supply nozzle 104.

The lower part of the left side wall 102L of the tank body 102, a supply port 105 for supplying the lubricating oil L stored in the tank body 102 to the sliding portion is formed, the supply port 105 ), A cylindrical supply nozzle 106 that stands up on the outer surface of the left wall 102L of the tank body 102 is provided so that the inner hole 106a communicates with the supply port 105. One end of the flexible supply pipe is connected to the supply nozzle 106.

In the upper portion of the left side wall 102L of the tank body 102, a reflux port 107 for refluxing the lubricant L supplied to the sliding portion to the tank body 102 is formed, and the reflux port 107 ), A cylindrical reflux nozzle 108 standing on the outer surface of the left wall 102L of the tank body 102 is provided so that the inner hole 108a communicates with the reflux port 107. One end of the flexible reflux pipe is connected to the reflux nozzle 108.

An air escape hole 109 is formed in the ceiling wall 102U of the tank body 102 so as to communicate the inside and the outside of the tank body 102, and the inside of the tank body 102 through the oil supply port 103. When lubricating oil L, the air present in the tank body 102 can be discharged to the outside of the tank body 102 as the oil surface La, which is the liquid level of the lubricating oil L, rises. have. In addition, when the oil surface La of the lubricating oil L inside the tank body 102 is lowered, air existing in the outside of the tank body 102 can be introduced into the tank body 102. have. That is, the air escape hole 109 can open the internal space 102a which is the inside of the tank main body 102 to air | atmosphere.

In addition, as shown in FIG. 14, the air escape hole 109 has the sewing machine main body B positioned so as to be located above the oil surface La of the lubricating oil L in a state where the sewing machine main body B is tilted and knocked down. It is arrange | positioned away from the longitudinal center axis | shaft RL in a normal state which does not tilt down. In addition, the longitudinal center axis RL thereof is disposed in parallel with the longitudinal direction (left and right direction in FIG. 9) of the sewing machine bed FB, and in the left and right directions in FIGS. 11 and 12 of the tank body 102. It is arranged parallel to the direction shown.

Reference numeral 102D in FIG. 11 of the tank body 102 denotes a bottom wall, reference numeral 102F in FIG. 12 is a front side wall, and reference numeral 102B in FIG. 12 is a rear side wall.

As for the maximum flow volume of the lubricating oil L stored in the tank main body 102, the oil surface La of the lubricating oil L after tilting down the sewing machine main body B is the air escape hole 109. It is set to be located below.

According to the oil tank 101 having such a configuration, the lubricating oil L is supplied to the inside of the tank body 102 through the oil supply port 103, and the lubricating oil L inside the lubricated tank body 102 is supplied. Through the port 105, it is supplied to sliding parts, such as a northern part. Then, the surplus lubricating oil (L) supplied to the sliding portion is refluxed into the tank body 102 through the reflux port 107. In addition, since the inside of the tank body 102 is opened to the atmosphere by the air escape hole 109 communicating with the inside and outside of the tank body 102 formed in the ceiling wall 102U of the tank body 102, the tank body No pressure is applied to the lubricant L inside the 102. As a result, the lubricating oil L can be easily introduced into the tank body 102 from the oil supply port 103 and the reflux port 107.

[Patent Document 1] Japanese Patent Publication No. 2003-164689

In the conventional oil tank as described above, the flow rate of the lubricating oil L stored in the tank body 102 may be lubricated in excess of the preset maximum flow rate. In this case, the oil surface La of the lubricating oil L is located above the reflux port 107, and the reflux port 107 is blocked by the lubricating oil L stored in the tank body 102. As a result, the oil surface La of the lubricating oil L stored inside the tank body 102 is located above the reflux port 107, and the oil surface La of the lubricating oil L is the reflux port. In the case where it is located below 107, the flow resistance of the lubricating oil L returned to the tank main body 102 changes, and there exists a problem that the quantity of the lubricating oil L supplied to the sliding part changes.

In addition, in the oil tank 101 of the conventional sewing machine, when the sewing machine main body B is tilted down by maintenance, etc., the lubricating oil (L) stored inside the tank main body 102 by the force when tilting it down is dropped (L). A wave is generated by vibrating the oil surface (La) of the tank), and the top part of the wave contacts the ceiling wall (102U) of the tank body (102), and a part of the lubricating oil (L) in contact with the tank body (2). There was a problem that the air flows out from the air escape hole 109 as it flows downward along the inner surface of the ceiling wall 102U and reaches the air escape hole 109.

An object of the present invention is to reliably supply oil to a part of a sewing machine regardless of the amount of lubricating oil stored in the oil tank.

In addition, an object of the present invention is to prevent the lubricating oil is blown out from the air escape hole when the sewing machine main body is tilted down.

The oil tank of the sewing machine according to the present invention is characterized in that the tank main body (2) for storing lubricating oil, the oil supply port (3) for lubricating oil into the tank main body, and the inside of the tank main body are stored. An oil tank of a sewing machine having a supply port (5) for supplying lubricating oil to a sliding part and a reflux port (8) for refluxing the lubricating oil supplied to the sliding part to the tank main body, the tank main body The ceiling cover portion 7 having an air chamber communicating therein with the inner space of the tank body is provided so as to protrude, and the reflux port is formed in the ceiling cover portion.

By adopting such a configuration, the air chamber can prevent the reflux port from being blocked by the lubricant stored in the tank body regardless of whether the flow rate of the lubricant stored in the tank body is large or small. The flow resistance of the lubricating oil returned to the tank body can be made constant. As a result, the supply amount of the lubricating oil to the sliding part can be made constant.

The oil tank of another sewing machine according to the present invention is characterized in that the tank body (2) is disposed inside the sewing machine main body (B) mounted so as to be able to tilt down on the sewing machine table (FB (F)) and stores lubricating oil. Oil supply port (3) for lubricating oil into the tank body, a supply port (5) for supplying the lubricating oil stored in the tank body to the sliding portion, and the lubricating oil supplied to the sliding portion A reflux port 8 for refluxing the tank body is formed, and an air escape hole 10 for opening the inside of the tank body to the atmosphere is formed in the ceiling wall 2U of the tank body. An oil tank of a sewing machine, wherein when the sewing machine main body is tilted and knocked down, the lubricating oil stored in the tank body is prevented from being ejected from the air escape hole to the outside of the tank body. In the point that the ejection stop wall (12, 12A, 12B, 22) is installed on the top wall inner surface of the tank body.

By adopting such a configuration, the jet blocking wall can block the lubricant oil trying to reach the air escape hole along the inner surface of the ceiling wall of the tank body in front of the air escape hole when the sewing machine main body is tilted down. When the sewing machine main body is tilted and knocked down, the lubricant can be prevented from blowing out from the air escape hole.

In another oil tank of the sewing machine according to the present invention, the ceiling cover of the tank main body is provided so that the ceiling cover part having an air chamber therein communicating with the inner space of the tank main body protrudes, and the reflux port is provided on the ceiling. It is preferable that it is provided in the cover part.

Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.

The structure of the sewing machine in which the oil tank of the sewing machine according to the present embodiment is installed is the same as that of the conventional sewing machine (see FIGS. 9 and 10) described above, and a detailed description thereof will be omitted and only the oil tank will be described.

1 to 3, the oil tank (1; hereinafter, simply referred to as 'oil tank') of the sewing machine according to the present embodiment, the tank body (2) formed in a horizontally long rectangular parallelepiped shape having an interior space; Has The internal space of the tank body 2 is a storage space 2a for storing the lubricating oil L. As shown in FIG. In addition, the tank main body 2 has the right side wall 2R shown on the right side of FIG. 1, the left side wall 2L shown on the left side of FIG. 1, and the right side wall 2R and the left side wall 2L shown below in FIG. After connecting the front side wall 2F connecting one end side (lower part of FIG. 2), and the other end side (upper part of FIG. 2) of the right side wall 2R and the left side wall 2L shown above in FIG. It is comprised mainly by the side wall 2B, the bottom wall 2D shown below of FIG. 1, and the ceiling wall 2U shown above of FIG.

What is necessary is just to set as the shape of the said tank main body 2 as needed, such as a shape of a sewing machine main body (symbol B of FIGS. 9 and 10), a design concept, and the like, and the horizontally long rectangular parallelepiped which is especially hollow inside this embodiment. It is not limited to a shape. For example, when the oil tank 1 is disposed below the sewing machine bed (symbol FB in FIGS. 9 and 10), the cross section may have a concave shape so that the lower axis may be passed from below when viewed from the sewing machine head. Of course, it is important to have a shape that does not interfere with other components installed inside the sewing machine body.

In the lower part of the right side wall 2R of the said tank main body 2, the oil supply port 3 for supplying lubricating oil L to the inside of the tank main body 2 is formed, The said oil supply port 3, the tank A cylindrical oil supply nozzle 4, which is mounted on the outer surface of the right side wall 2R of the main body 2, is provided so that the inner hole 4a communicates with the oil supply port 3. In addition, the oil supply port 3 and the internal hole 4a of the oil supply nozzle 4 of this embodiment are formed in the same size. One end of the flexible oil supply pipe is connected to the oil supply nozzle 4.

In the lower part of the left side wall 2L of the tank body 2, a supply port 5 for supplying the lubricating oil L stored in the tank body 2 to the sliding portion is formed, and the supply port 5 ), A cylindrical supply nozzle 6, which is mounted on the outer surface of the left wall 2L of the tank body 2, is installed so that the inner hole 6a communicates with the supply port 5. In addition, the supply port 5 of this embodiment and the inner hole 6a of the supply nozzle 6 are formed in the same size. One end of the flexible supply pipe is connected to the supply nozzle 6.

On the upper surface of the tank body 2, in detail, on the left lower corner of FIG. 2 of the ceiling wall 2U, the ceiling cover part 7 formed in a case shape with a lower opening is integrally formed so as to protrude upward. It is installed. The interior space of the ceiling cover part 7 communicates with the storage space 2a which is the interior space of the tank body 2, and the interior space of the ceiling cover part 7 is a ceiling wall of the tank body 2. It is arranged above 2U and becomes the air chamber 7a.

On the left side wall 7L of the ceiling cover portion 7 shown on the left side of FIG. 1, a reflux port 8 for refluxing the lubricant L supplied to the sliding portion to the tank body 2 is provided with an air chamber 7a. It is formed to communicate with. In other words, the reflux port 8 is arranged below the fabric information of the air chamber 7a. In the reflux port 8, a cylindrical reflux nozzle 9, which is mounted on the outer surface of the left wall 7L of the ceiling cover part 7, is installed, and the inner hole 9a communicates with the reflux port 8. It is installed as possible. Furthermore, one end of the flexible reflux pipe is connected to the reflux nozzle 9. The reflux port 8 and the inner hole 9a of the reflux nozzle 9 of the present embodiment are formed in the same size.

The shape of the ceiling cover portion 7 can be selected from various shapes, such as a cylindrical shape with a bottom and an angular cylindrical shape with a bottom, according to the needs of a design concept or the like. In addition, as the installation position of the ceiling cover part 7, if it is a position which does not interfere with the formation position of the air escape hole 10 mentioned later, it may be based on the necessity of a design concept from arbitrary positions of the outer surface of the ceiling wall 2U. You can choose. Of course, the ceiling cover 7 may be provided on the side of the tank body 2. In this case, it is important to arrange the height position of the ceiling of the ceiling cover portion 7 above the ceiling wall 2U of the tank body 2. In addition, it is important to install so as not to interfere with other components installed inside the sewing machine body.

The reflux port 8 is not limited to the left wall 7L of the ceiling cover portion 7, but may be formed at any position of the ceiling cover portion 7. It is desirable to form it as close to the ceiling as possible. Of course, it can also be formed in the upper surface of the ceiling cover part 7.

In the vicinity of the upper right corner in FIG. 2 of the ceiling wall 2U of the tank body 2, air existing in the tank body 2 is discharged to the outside of the tank body 2, or the tank body An air escape hole 10 for introducing air existing outside of (2) into the tank body 2 is formed. As shown in FIG. 4, the air escape hole 10 is in a normal state in which the sewing machine main body is not tilted down so as to be located above the oil surface La of the lubricating oil L in a state where the sewing machine main body is tilted down. Is located far from the longitudinal center axis (RL) at.

In addition, the longitudinal center axis RL thereof is disposed in parallel with the longitudinal direction (left and right direction in FIG. 9) of the sewing machine bed (symbol FB in FIG. 9), and the tank body 2 is illustrated in FIGS. 1 and 2. It is arrange | positioned in parallel with the direction shown to the left-right direction of. Moreover, as shown by the dashed-dotted line of FIG. 1, the cylindrical body 11 which surrounds the air escape hole 10 can also be provided in the outer surface of 2U of ceiling walls.

Inside the tank main body 2, when the sewing machine main body is tilted and knocked down, a jet stopper for preventing the lubricant L stored in the tank main body 2 from being blown out from the air escape hole 10 to the outside. The wall 12 is formed.

The ejection blocking wall 12 of the present embodiment is formed in a flat plate shape extending vertically toward the bottom wall 2D on the inner surface of the ceiling wall 2U, and the right end is connected to the right wall 2R. The left end is connected to the left wall 2L. In addition, the blow-off blocking wall 12 is formed of the air escape hole 10 and the rear wall 2B shown above in FIG. 2, which are far away (outside) of the longitudinal center axis RL from the air escape hole 10. It is arranged in between. That is, the jet blocking wall 12 of this embodiment is formed in parallel with the longitudinal center axis RL in the air separation hole 10 far from the longitudinal center axis RL of the sewing machine main body. The lower end of the jet blocking wall 12 is disposed above the bottom surface, which is the upper surface (inner surface) of the bottom wall 2D of the tank body 2. What is necessary is just to set the position of the lower end of the said injection blocking wall 12 as needed, such as a design concept.

The blow-off blocking wall 12 may have a short length in the left and right directions in FIG. 1 and may have a cylindrical shape surrounding the air escape hole 10. It may be of various shapes, such as a planar semicircle, a planar triangle, and a planar semi-ellipse, which surround at least the distance from the air escape hole 10 to the longitudinal center axis RL. That is, as the jet blocking wall 12, when the sewing machine main body is inclined and knocked down, the lubricating oil L supplied and stored in the storage space 2a which is the inside of the tank main body 2 is the inner wall of the tank main body 2; What is necessary is just to be able to prevent it from blowing out from the air escape hole 10 along the inner surface of 2U of ceiling walls which are a part. The jet blocking wall 12 may have a plurality of holes penetrating in the thickness direction.

FIG. 5 shows an example of the short-stop ejection blocking wall 12A in the left and right directions. 6 shows an example of the cylindrical jet blocking wall 12B surrounding the air escape hole 10.

The oil tank 1 of this embodiment is integrally molded by resin, such as polypropylene.

Other configurations are the same as those of the conventional oil tank, and thus detailed description thereof will be omitted.

Next, the effect | action of this embodiment which consists of a structure mentioned above is demonstrated.

According to the oil tank 1 of this embodiment, the lubricating oil L is supplied to the storage space 2a inside the tank main body 2 through the oil supply port 3, and the tank main body 2 refueled like the conventional art. The internal lubricating oil (L) is supplied to the sliding portion through the supply port (5), the surplus lubricating oil (L) supplied to the sliding portion is the storage space inside the tank body (2) through the reflux port (8) To reflux (2a).

Moreover, according to the oil tank 1 of this embodiment, when the lubricating oil L flows into the storage space 2a inside the tank main body 2 through the oil supply port 3 and / or the reflux port 8, Since the inside of the tank body 2 is opened to the atmosphere by the air escape hole 10 communicating with the inside and outside of the tank body 2 formed in the ceiling wall 2U of the tank body 2, the tank body ( No pressure is applied to the lubricant (L) inside 2).

That is, when lubricating oil L is supplied to the storage space 2a inside the tank main body 2 through the oil supply port 3, as the oil surface La which is the oil surface of the lubricating oil L rises, The air present in the tank body 2 can be discharged to the outside of the tank body 2. In addition, when the oil surface La of the lubricating oil L stored in the storage space 2a inside the tank main body 2 falls, the tank main body will follow the lowering of the oil surface La of the lubricating oil L. Air existing outside (2) can be introduced into the tank body (2). As a result, the lubricating oil L can be easily introduced into the storage space 2a inside the tank body 2 from the oil supply port 3 and / or the reflux port 8.

Moreover, according to the oil tank 1 of this embodiment, the air chamber 7a which communicates with the storage space 2a in the tank main body 2 inside is provided in the ceiling wall 2U of the tank main body 2 inside. Since the ceiling cover part 7 protrudes, and the reflux port 8 is formed in the left wall 7L of the ceiling cover part 7, air is always present in the air chamber 7a. . That is, even if the position of the oil surface La becomes the same height as the inner surface of the ceiling wall 2U of the tank body 2 by filling and supplying the lubricating oil L inside the storage space 2a of the tank body 2, Since the air chamber 7a is independently positioned on the oil surface La, air present in the air chamber 7a is not discharged to the outside from the air escape hole 10 and is compressed to a negligible degree. It stays inside the air chamber 7a in a state.

Therefore, according to the oil tank 1 of this embodiment, unlike the conventional one, the oil surface La of the lubricating oil L is located below the reflux port 8, and the storage space inside the tank main body 2 ( The reflux port 8 is not blocked by the lubricating oil L stored in 2a). That is, regardless of the flow rate of the lubricating oil L stored in the storage space 2a, the reflux port 8 is always in communication with the air chamber 7a in which air is present.

Therefore, according to the oil tank 1 of this embodiment, the flow resistance of the lubricating oil L returned to the tank main body 2 does not change, but the flow volume of the lubricating oil L stored in the storage space 2a is not changed. Irrespective of whether, the supply amount of the lubricating oil L to a sliding part can be kept constant.

Moreover, according to the oil tank 1 of this embodiment, when the sewing machine main body is tilted and fell, the lubricating oil L stored in the storage space 2a inside the tank main body 2 is tanked from the air escape hole 10. When the jet stop wall 12 is installed on the inner surface of the ceiling wall 2U of the tank main body 2 to prevent it from being blown out of the main body 2, when the sewing machine main body is tilted and knocked down due to maintenance or the like, When tilted and knocked down, as the lubricant L stored in the tank body 2 flows, the oil surface La of the lubricant L vibrates and a wave is generated, and the top of the wave is the tank body 2 In contact with the ceiling wall (2U), a part of the lubricating oil (L) in contact with it flows downward along the inner surface of the ceiling wall (2U) of the tank body (2U) and falls downward in the dropped direction. E.g., the ejection blocking wall 12 makes it possible to reach I can stop it. At this time, the lubricating oil L in contact with the jetting blocking wall 12 flows from the lower end of the jetting blocking wall 12 toward the oil surface La along the jetting blocking wall 12.

Therefore, according to the oil tank 1 of this embodiment, even when the sewing machine main body is inclined and fell down vigorously, the lubricating oil L can be prevented from blowing out from the air escape hole 10 outside.

Therefore, according to the oil tank 1 of this embodiment, when the supply amount of the lubricating oil L changes with respect to a sliding site | part, and / or when the sewing machine main body tilts and falls, the lubricating oil L will air-departure hole 10 It is possible to surely achieve high performance by reliably and easily preventing the jetting from the outside to the outside.

Moreover, according to the oil tank 1 of this embodiment, as shown in FIG. 4, it is formed in parallel with the hardness center axis RL in the air separation hole 10 far from the hardness center axis RL of the sewing machine main body. Since the ejection blocking wall 12 is provided, the lubricating oil L is inclined along the inner surface of the ceiling wall 2U and flows downward in the down direction to reach the air escape hole 10. It can be easily prevented.

Moreover, as shown in FIG. 6, when the jetting stop wall 12B formed so that the circumference | surroundings of the air escape hole 10 is provided is provided, the lubricating oil L is directed in all directions along the inner surface of the ceiling wall 2U. It is possible to more reliably and easily prevent attempting to reach the air escape hole 10 from the air.

7 and 8, a second embodiment of the oil tank according to the present invention will be described.

The oil tank 1A of the present embodiment is configured to increase the amount of storage of the lubricating oil L by placing the height position of the air escape hole 10 above the height position of the reflux port 8.

That is, in the oil tank 1A of this embodiment, as shown in FIG. 7 and FIG. 8, the upper surface of the tank main body 2, in detail, the ceiling cover part 7 in the ceiling wall 2U is not formed. As shown in FIG. 8, for example, the ceiling cover 7 is provided at the lower left corner of FIG. 8 on the upper surface of the tank body 2, so that the air escape hole of the upper surface of the tank body 2 ( In the right part of FIG. 8 including the formation part of 10), the enlarged ceiling cover part 21 formed in the case shape which opened the lower part is integrally provided so that it may protrude upwards. The internal space of the ceiling cover portion 21 for extension is an enlarged storage space 21a of the lubricating oil L, and communicates with the storage space 2a which is the internal space of the tank body 2. Then, the air escape hole 10 is formed in the ceiling wall 21U of the ceiling cover portion 21 for increase, and the ejection blocking wall 22 on the inner surface of the ceiling wall 21U of the ceiling cover portion 21 for increase. Is installed.

As described above, an air chamber 7a and an enlarged storage space 21a communicating with the internal space of the tank body 2 are formed above the ceiling wall 2U of the tank body 2. The reflux port 8 is connected to the air chamber 7a. The reflux port 8 is connected to a sliding portion that requires the supply of lubricating oil L, such as the north, by a connecting member such as a tube (not shown). For this reason, the air chamber 7a is closed, which is not directly opened to the atmosphere due to the fact that the path by the connecting member is relatively long, or that the lubricating oil L is usually present in the sliding portion. It is a system. When the oil surface La rises above the ceiling wall 2U, air is trapped in the air chamber 7a.

On the other hand, in the enlarged storage space 21a, the air escape hole 10 is formed in the upper surface. For this reason, when the oil surface La of the lubricating oil L rises above 2U of the ceiling walls, the lubricating oil L will be mainly filled in the enlarged storage space 21a.

The ejection blocking wall 22 of this embodiment is formed in the inner surface of the ceiling wall 21U in the shape of the flat plate extended perpendicularly to the bottom wall 2D of the tank main body 2, and the right end is extended. It is connected to the right side wall 21R of the ceiling cover part 21, and the left end is connected to the left side wall 21L of the ceiling cover part 21 for extending. In addition, the blow-off blocking wall 22 is an air escape hole 10, which is far from the air escape hole 10 (outside) of the longitudinal center axis RL, and an enlarged ceiling cover portion 21 shown above in FIG. Is arranged between the rear side walls 21B. That is, the jet stop wall 22 of this embodiment is formed in parallel with the hardness center axis RL in the air separation hole 10 far from the hardness center axis RL of the sewing machine main body. In addition, the lower end of the jet blocking wall 22 is arrange | positioned in the substantially intermediate position of the height direction shown in the up-down direction of FIG. 7 of the extending ceiling cover part 21 as shown in FIG.

In addition, the shape of the extending ceiling cover part 21 of this embodiment is an example, Various shapes can be used as needed, such as a design concept. Of course, it is important to install so as not to interfere with other components installed inside the sewing machine body.

Since other configurations are the same as those of the oil tank 1 of the first embodiment, the same reference numerals are used in the drawings for the configuration that is the same as or equivalent to the oil tank 1 of the first embodiment. The description thereof will be omitted.

According to the oil tank 1A of this embodiment which consists of such a structure, the same effect as the oil tank 1 of 1st Embodiment mentioned above can be achieved, and as shown in FIG. 21) The lubricating oil L can also be stored in the enlarged storage space 21a therein, and the storage amount of the lubricating oil L can be increased. As a result, the frequency of maintenance for replenishing the lubricating oil L can be reduced, and the convenience of use can be improved.

In addition, according to the oil tank 1A of the present embodiment, the air chamber 7a is provided above the ceiling wall 2U of the tank main body 2 and communicates with the internal space of the tank main body 2, and is for increasing the volume. It is provided with the storage space 21a, the reflux port which is provided in the air chamber 7a, and is connected to the sliding part of a sewing machine by the connection member, such as a tube, and the air escape hole 10 formed in the storage space 21a for increase. When the oil surface La of the lubricating oil L rises above the ceiling wall 2U, the lubricating oil L is filled in the enlarged storage space 21a. In addition, it is more preferable that the upper surface of the enlarged storage space 21a is higher than the upper surface of the air chamber 7a.

In addition, when the sewing machine main body is tilted and knocked down, the jetting prevention wall 22 of this embodiment has the lubricating oil L as the lubricating oil L stored in the tank body 2 flows when tilted and knocked down. The oil surface La vibrates and a wave is generated, and the top of the wave contacts the ceiling wall 21U of the ceiling cover portion 21 for extension, so that a part of the lubricating oil L in contact with that is extended. It is possible to reliably and easily prevent the flow of the inlet 21 from falling down along the inner surface of the ceiling wall 21U of the part 21 and trying to reach the air escape hole 10 at this time. The lubricating oil L in contact with 22 flows down from the lower end of the jetting blocking wall 22 toward the oil surface La along the jetting blocking wall 22.

In addition, this invention is not limited to each embodiment mentioned above, A various change is possible as needed.

According to the oil tank of the sewing machine according to the present invention, by installing an air chamber, the reflux port is prevented from being blocked by the lubricating oil stored in the tank body, regardless of whether the flow rate of the lubricating oil stored in the tank body is small or small. Therefore, the flow resistance of the lubricating oil returned to the tank body can be made constant. As a result, the supply amount of the lubricating oil to the sliding part can be made constant.

In addition, when the sewing machine main body is tilted and knocked down by installing the jet blocking wall, the lubricating oil which tries to reach the air escape hole along the inner surface of the tank body of the tank body can be prevented right in front of the air escape hole. Lubrication oil can be prevented from blowing out from the air escape hole when it is dropped.

Claims (3)

A tank main body for storing lubricating oil, an oil supply port for lubricating oil into the tank body, a supply port for supplying lubricating oil stored in the tank body to the sliding part, and a sliding part A reflux port for refluxing the lubricated oil to the tank body is provided, and the oil supply port and the supply port are installed in the tank body as an oil tank of a sewing machine. Further provided with a ceiling cover part having an air chamber therein communicating with the inner space of the tank body, The ceiling cover part is provided to protrude from the ceiling wall or the side surface of the tank body, The height position of the ceiling of the ceiling cover part is disposed above the ceiling wall of the tank body, The reflux port is provided in the ceiling cover portion, the oil tank of the sewing machine. It is disposed inside the main body of the sewing machine mounted so as to be tilted to the sewing machine table, and at the same time the tank body for storing lubricating oil, an oil supply port for lubricating oil into the tank body, and stored in the tank body. A supply port for supplying lubricating oil to the sliding part and a reflux port for returning the lubricating oil supplied to the sliding part to the tank main body are provided, and the inside of the tank main body is placed on the ceiling wall of the tank main body. An oil tank of a sewing machine having an air escape hole for opening, When the sewing machine main body is inclined and knocked down, a jet blocking wall for preventing the lubricant oil stored in the tank body from being ejected from the air escape hole to the outside of the tank body is provided on the inner surface of the ceiling wall of the tank body. Oil tank of the sewing machine characterized in that there is. 3. The method of claim 2, On the ceiling wall of the tank body, a ceiling cover part having an air chamber communicating therewith with the inner space of the tank body is provided to protrude. The oil tank of the sewing machine, characterized in that the reflux port is formed in the ceiling cover.

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