JP2007061480A - Oil receiving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil receiving device by which a manufacturing cost can be reduced and the oil surface height can be easily and accurately observed. <P>SOLUTION: This oil receiving device has a main body 19 which surrounds a sliding part and protects the lubricating oil from spluttering, a bottom board 20 which forms the bottom of the main body 19 and has a drain 23 from which the lubricating oil provided to the sliding part is drained, a window 29 through which the oil surface height of the lubricating oil can be viewed while a sewing machine frame 10 is positioned in its tilted position, and a stop cap 26 which is attachable to and detachable from the drain 23. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an oil receiver, and in particular, an oil receiver capable of easily and accurately observing the oil level height of lubricating oil stored in an oil receiver that surrounds a feed transmission mechanism with a simple structure. Relates to the device.

  Conventionally, the feed transmission mechanism in industrial sewing machines has been lubricated with oil from an oil tank in order to prevent problems such as seizure due to overheating that occurs during the operation of the sewing machine. The mechanism is designed to maintain a lubricated state. The lubricated oil after lubrication is stored in an oil receiving portion attached to the main body frame so as to surround the feed transmission mechanism, and then scattered by the rotational motion of a cam which is one of the components of the feed transmission mechanism. The feed transmission mechanism is lubricated again (see, for example, Patent Document 1).

  Further, the oil receiving portion described above is a box-shaped member having an open upper end and a lower end, or a headed tubular member having an open lower end, and the lower end is closed by a sealing member. Such a sealing member includes a bottom plate portion in which a discharge port for discharging lubricating oil is formed, and a sealing plug that can be attached to and detached from the discharge port. The sealing plug is removed from the discharge port. By doing so, the lubricating oil stored in the oil receiving portion is discharged to the outside.

By the way, the industrial sewing machine is generally capable of tilting to a tilted position in which the main body frame is tilted about the horizontal axis from the standing position (see, for example, Patent Document 2). An oil level inspection window is provided for confirming the oil level of the lubricating oil stored in the oil receiver when the feed transmission mechanism or the like is moved to the tilted position during inspection work. This oil level inspection window is formed of a transparent or translucent material, and is bonded and sealed to the bottom plate portion in order to prevent leakage of lubricating oil stored in the oil receiving portion.
Japanese Patent Laid-Open No. 2003-311062 JP 2003-326068 A

However, since the oil level inspection window described above undergoes a number of processing steps such as coating, bonding, and drying during bonding and sealing operations to the bottom plate portion, much time and labor are required in the manufacture of the sealing member and, in turn, the sewing machine. As a result, there is a problem that productivity is reduced.
Further, since the oil level inspection window and the sealing plug are provided separately and independently on the bottom plate portion, there is a problem that the manufacturing cost increases due to an increase in the number of parts constituting the sewing machine. ing.

In addition, if the tilt angle of the main body frame changes due to different parts attached to the main body frame according to the specifications of the sewing machine, or if the amount of lubricating oil stored in the oil receiver changes, etc. A change occurs in the oil level height of the lubricating oil visually recognized from the viewing window, and it is very difficult to accurately observe the oil level height.
Therefore, as countermeasures against such changes in oil level height, for example, the size of the oil level inspection window is increased in order to enlarge the visible range, or different parts for each machine specification are added to the machine body frame. Although the proposal of attachment etc. is examined, in any case, various problems, such as a manufacturing cost rising, will arise.

  The present invention has been made in view of the above-described points, and an object thereof is to provide an oil receiver capable of suppressing the manufacturing cost and observing the oil level height easily and accurately. .

In order to solve the above problems, an oil receiver according to the invention described in claim 1 is:
The main body frame is provided in a sewing machine that can be switched between an upright position that is a posture for sewing and a tilted position that is tilted about the horizontal axis from the upright position. In the oil receiving device for storing the lubricating oil supplied to the sliding portion that slides,
A body portion surrounding the sliding portion and preventing splashing of lubricating oil;
Forming a bottom surface of the main body, and a bottom plate having an opening for performing a discharge operation of lubricating oil to be lubricated to the sliding portion;
A window part capable of visually recognizing the oil surface height of the lubricating oil in a state where the main body frame is disposed at an inclined position, and a sealing plug removable from the opening part. And

  In the oil receiver according to the invention described in claim 2, the window is configured so that the window is in accordance with the inclination angle of the main body frame at the tilt position or the amount of lubricating oil stored in the oil receiver. It is characterized in that the thickness dimension of can be changed.

According to the first aspect of the present invention, the main body part that surrounds the sliding part and prevents the scattering of the lubricating oil and the bottom surface of the main body part are formed, and the operation of discharging the lubricating oil to be injected into the sliding part is performed. A bottom plate having an opening, and a sealing plug detachably attached to the opening, including a window capable of visually checking the oil level of the lubricating oil in a state in which the main body frame is disposed at an inclined position. As a result, the sealing plug performs the function of sealing the stored lubricating oil and the function of observing the oil level of the lubricating oil. In addition, it is possible to eliminate the complicated operation of making the window portion with respect to the bottom plate portion.
Therefore, by reducing the time, labor, and cost required for the window manufacturing operation, productivity can be improved and manufacturing cost can be suppressed.

According to the second aspect of the present invention, the thickness dimension of the window portion can be changed according to the inclination angle of the main body frame at the inclined position or the amount of lubricating oil stored in the oil receiving device. Lubricating oil that can be seen from the window by changing the tilt angle of the main body frame due to different parts attached to the main body frame in accordance with the specifications of the above, or by changing the amount of lubricating oil stored in the oil receiving device Even if the oil level changes, the oil level of the lubricating oil can be easily and accurately changed by replacing the sealing plug or adding a transparent or translucent member to the inner surface of the window. It becomes possible to observe.
Therefore, the adaptability of the sewing machine to the usage environment or usage status can be improved, and convenience can be improved.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

First, the sewing machine 1 according to the present embodiment will be described with reference to FIGS.
As shown in FIG. 1, the sewing machine 1 according to this embodiment includes a substantially rectangular sewing table 3 supported by four legs 2, and a sewing machine body 4 disposed on the upper surface of the sewing table 3. Yes.
Among these, an operation provided on the upper surface of the sewing machine table 3 is provided with an input unit for setting and inputting sewing data for causing each mechanism unit of the sewing machine body 4 to execute various sewing operations, and a display unit for displaying the sewing data. A panel 5 is provided and is connected to the sewing machine body 4 via a wired or wireless line (signal line) (not shown).
On the other hand, as shown in FIG. 2, a storage tank 6 for storing lubricating oil is provided on the lower surface side of the sewing machine table 3 and below the sewing machine main body 4, and the sewing machine main body 4 is driven by a pump (not shown). It is supplied to each sliding part provided inside. As shown in FIG. 1, a lower part of the sewing machine table 3 has a power switch 7 that can be pushed, a pedal 8 for operating the sewing machine 1, and a control unit for controlling the operation of each part of the sewing machine 1. 9 and 9 are provided.

  As shown in FIG. 3, the sewing machine body 4 is provided with a sewing machine frame 10 whose outer shape is formed in a substantially U shape when viewed from the front. The sewing machine frame 10 includes a sewing machine arm portion 11 that forms an upper portion of the sewing machine body 4 and extends in the longitudinal direction of the sewing machine table 3, a sewing machine bed portion 12 that forms a lower portion of the sewing machine body 4 and faces the sewing machine table 3, and It comprises a vertical body portion 13 that connects the portion 11 and the sewing bed portion 12 and extends in a direction orthogonal to the longitudinal direction of the sewing arm portion 11 and the sewing bed portion 12.

The sewing machine body 4 having the above-described configuration is connected to the sewing machine table 3 via a hinge mechanism (not shown) provided on the rear side of the sewing machine body 4, and is used when sewing a sewing product indicated by a solid line in FIG. 2. It is possible to switch between an upright position, which is the posture of FIG. 2, and a tilt position, which is a posture when performing maintenance or the like of the sewing machine body 4 indicated by a broken line in FIG.
Here, the tilted position refers to a position where the sewing machine body 4 is tilted to the rear side by a predetermined angle by rotating around the horizontal axis from the standing position by a hinge mechanism.

Further, as shown in FIGS. 1 and 3, a sewing machine motor 14 serving as a power source for sewing work is provided on the upper portion of the vertical body portion 13 of the sewing machine body 4, and an upper shaft (not shown) connected to the sewing machine motor 14. And a power transmission mechanism mainly including a lower shaft (not shown) that rotates when a driving force is applied from the upper shaft via another belt mechanism (not shown).
Among these, the upper shaft is provided so as to be rotatable along the longitudinal direction inside the sewing machine arm portion 11. Further, as shown in FIGS. 1 and 3, a needle bar 15 is connected to the other end of the upper shaft via a cam or a rod (not shown), and the lower part of the needle bar 15 is replaceable. A sewing needle 16 is provided. Below the needle bar 15 and the sewing needle 16 in the sewing bed portion 12, a cloth feeding mechanism 17 for feeding the material to be sewn is provided.

  On the other hand, the lower shaft is provided so as to be rotatable along the longitudinal direction inside the sewing machine bed portion 12, and an eccentric cam or the like is connected to one end side of the lower shaft connected via the belt mechanism described above. Gears and the like are attached, and these constitute a transmission mechanism of the cloth feed mechanism 17 to a plurality of feed shafts (not shown). And each member of these transmission mechanisms comprises the sliding part. The sliding portion is disposed in the lower part of the vertical body portion 13 and inside the oil receiving device 18 formed in a substantially rectangular parallelepiped shape.

As shown in FIGS. 1 and 4, the oil receiver 18 includes a main body 19 and a bottom plate 20 that forms the lower surface of the oil receiver 18. As shown in FIG. 5, the oil receiving device 18 having such a configuration stores lubricating oil therein, and the above-described eccentric cam or gear of the sliding portion touches the stored lubricating oil. The sliding portion is lubricated with lubricating oil.
Of these, the main body portion 19 excludes the lower portion of the sliding portion because when the lubricating oil is supplied to the sliding portion, the lubricating oil scatters to the outside of the oil receiving device 18 due to the rotational operation of the sliding portion. It forms a partition that surrounds the surroundings. An air hole 21 for introducing air into the oil receiver 18 is formed on the wall surface of the main body 19.
On the other hand, as shown in FIG. 6, the bottom plate portion 20 is a detachable plate-like member, and a plurality of insertion holes are formed in the edge portion of the plate-like member. Bolts 22 threaded with male screws are inserted through these insertion holes, and the bottom plate portion 20 is fixed to the main body portion 19.

Further, as shown in FIG. 5, the bottom plate portion 20 is provided with a discharge port 23 for discharging lubricating oil, and a convex portion 24 protruding downward is formed in the vicinity of the discharge port 23. ing.
Further, two marks 25 for observing the oil level height of the lubricating oil stored in the oil receiving device 18 are formed on the bottom plate portion 20.

The above-described discharge port 23 is provided with a substantially headed cylindrical sealing plug 26 integrally formed of a transparent or translucent plastic or the like, and a female screw threaded on the inner peripheral wall surface of the discharge port 23. And can be mounted by screwing a male screw threaded on the outer peripheral wall surface on the opening side of the sealing plug 26.
Further, as shown in FIG. 7, the head portion of the sealing plug 26 is provided with a protruding portion 27 extending in the outer diameter direction, and between the protruding portion 27 and the bottom plate portion 20. An O-ring 28 formed of a flexible resin such as rubber is disposed. The O-ring 28 is compressed and deformed in the radial direction by a force applied inward of the oil receiving device 18 when the sealing plug 26 is mounted. The sealing performance between the stopper 26 and the bottom plate portion 20 is improved.

  In addition, although the O-ring 28 in this embodiment is shape | molded by the resin which has flexibility, if it compresses and deforms to radial direction with the force applied, it will not be specifically limited.

A substantially circular window 29 is provided at the head of the sealing plug 26 described above so as to be substantially concentric with the sealing plug 26. The window portion 29 is formed so that the both sides thereof are smooth and have a predetermined thickness dimension so that the lubricating oil stored in the oil receiving device 18 at the tilted position can be visually recognized. It has become.
Further, as shown in FIG. 6, a plurality of grooves 30 that are spaced at equal intervals along the circumferential direction are formed on the outer periphery of the window portion 29, and a predetermined engagement member is engaged with these grooves 30. Thus, the sealing plug 26 is rotated and removed.

  The sealing plug 26 in the present embodiment is integrally formed of a transparent or translucent resin as a whole, but is not particularly limited. For example, only the window portion 29 is transparent or It may be formed of a translucent resin. The sealing plug 26 is formed using a transparent or translucent resin as a raw material, but is not particularly limited as long as it is a transparent or translucent material. For example, the sealing plug 26 is an inorganic material such as glass. May be.

Here, the relationship between the mark 25 described above and the window 29 in the sealing plug 26 will be described with reference to FIGS. 2 and 6.
As described above, the sewing machine body 4 can be tilted to the tilt position indicated by the broken line in FIG. The mark 25 indicates whether or not the oil amount is within an appropriate range from the liquid level height when the sewing machine body 4 is tilted to the tilt position. That is, as shown in FIG. 6, one mark indicates the lower limit of the oil level, and the other mark indicates the upper limit of the oil level. With these marks 25, it is possible to easily determine whether or not the amount of stored lubricating oil is an appropriate amount.
Here, the upper limit of the oil level height of the stored lubricating oil means the oil level height of the lubricating oil that does not leak from the air hole 21 of the main body 19 at the standing position. The lower limit of the oil level is the oil level of the lubricating oil that can be supplied to the sliding part during operation.

  Note that the mark 25 in the present embodiment is formed with two marks 25 including a mark indicating the upper limit (upper limit position) and a mark indicating the lower limit (lower limit position), but at least the mark indicating the upper limit and the lower limit Any one of the marks indicating suffices to be formed. In addition, a mark may be attached to a standard position located between the upper limit position and the lower limit position.

In addition, the window portion 29 in the present embodiment has a predetermined thickness dimension, but is not limited thereto. For example, the sewing machine 1 is an external device for adding a new function to the outside of the sewing machine body 4. In such a case, the tilt angle at the tilt position of the sewing machine body 4 is changed and adjusted. At this time, as shown in FIG. 8, another sealing plug having a different thickness dimension of the window portion 29 is used according to the tilt angle at the tilt position, or a desired thickness dimension is set on the inner surface side of the window portion 29. It may be configured such that the thickness dimension of the window portion 29 can be appropriately changed by separately attaching the transparent or translucent adjustment member 31 that is provided.
Specifically, when the tilt angle from the standing position to the tilted position decreases, the oil level that is visually recognized from the window portion 29 increases. In this case, the sealing with a large thickness dimension of the window portion 29 is performed. Replace with plug 26. On the other hand, when the inclination angle is increased, the oil level is lowered. In this case, the sealing plug 26 having a small thickness of the window portion 29 is replaced. And the thickness dimension of the window part 29 of the sealing plug 27 is suitably changed and adjusted so that it may be settled in the range of the appropriate oil level height shown by each of the mark 25 mentioned above.

  Further, the window portion 29 in the present embodiment is fixed to the head of the sealing plug 26, but is not particularly limited. For example, the depth relative to the entire sealing plug 26 is deep. It may be provided so that the movement can be adjusted in the direction.

Next, the operation of the sewing machine 1 in the present embodiment will be described with reference to FIG.
When the user presses the power switch 7 to turn it ON, the sewing machine motor 14 is supplied with power, and the sewing machine motor 14 is rotationally driven in accordance with the operation of the pedal 8, and the needle bar 15 moves up and down, that is, the hand movement is started. The Further, in synchronism with the start of hand movement, the sewing machine motor 14 and the cloth feed mechanism 17 are controlled based on the data set on the operation panel 5, and the sewing material is fed at a predetermined cloth feed pitch, so that sewing is performed. Work is performed.
Thereafter, the same operation is repeatedly executed until a desired sewing is obtained, and a series of sewing operations is completed.

At this time, for example, the sewing machine body 4 is tilted once a week to clean the shuttle (not shown), and at the same time, the amount of lubricating oil stored in the oil receiving device 18 and the state of the lubricating oil are checked. Can do.
Further, since the stored lubricating oil can be viewed through the window portion 29 of the sealing plug 26 in the bottom plate portion 20, the function of the lubricating plug to seal the stored lubricating oil and the lubricating oil By performing the function of observing the oil level height, it is not necessary to separately provide a window portion on the bottom plate portion 20, and a strict and complicated window portion manufacturing operation for the bottom plate portion 20 can be eliminated.

  Further, since the sealing plug 26 is integrally formed of a transparent or translucent resin, the window portion 29 can be easily made from an inexpensive material.

  Furthermore, since a mark 25 is provided around the window portion 29 in the bottom plate portion 20 to indicate that the stored amount of lubricating oil is an appropriate amount, based on this mark 25, it is easy from the viewpoint of the oil level. In addition, it is possible to easily determine whether the amount of lubricating oil is an appropriate amount by observing accurately.

  Furthermore, by exchanging with another sealing plug 26 having a different thickness dimension of the window portion 29, it is possible to cope with fluctuations in the oil level due to changes in the tilt angle of the sewing machine frame 10 at the tilt position. Therefore, the oil level height of the lubricating oil visually recognized from the window portion 29 is changed by changing the tilt angle of the sewing machine frame 10 due to different parts attached to the sewing machine frame 10 according to the specifications of the sewing machine 1. Even in this case, the oil level height of the lubricating oil can be easily and accurately observed by replacing the sealing plug 26 or adding a transparent or translucent member to the inner surface side of the window portion 29.

It is a front view which shows the whole structure of a sewing machine. It is a longitudinal cross-sectional view which shows the aspect of the sewing machine main body in a standing position and a tilting position. It is a perspective view which shows the aspect of a sewing machine main body. It is a front view which shows the external appearance structure of an oil receiver. It is a longitudinal cross-sectional view which shows the internal structure of an oil receiver. It is a front view which shows the external appearance structure of a baseplate part and a sealing stopper. It is a longitudinal cross-sectional view which expands and shows the aspect of the sealing stopper in an inclination position. It is a longitudinal cross-sectional view which expands and shows the aspect of the other sealing stopper in an inclination position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewing machine 4 Sewing machine main body 18 Oil receiving device 19 Main body part 20 Bottom plate part 23 Outlet 25 Mark 26 Sealing plug 29 Window part 31 Adjustment member

Claims (2)

The main body frame is provided in a sewing machine that can be switched between an upright position that is a posture for sewing and a tilted position that is tilted about the horizontal axis from the upright position. In the oil receiving device for storing the lubricating oil supplied to the sliding portion that slides,
A body portion surrounding the sliding portion and preventing splashing of lubricating oil;
Forming a bottom surface of the main body, and a bottom plate having an opening for performing a discharge operation of lubricating oil to be lubricated to the sliding portion;
A window part capable of visually recognizing the oil surface height of the lubricating oil in a state where the main body frame is disposed at an inclined position, and a sealing plug removable from the opening part. Oil receiving device.   The window portion is capable of changing a thickness dimension of the window portion according to an inclination angle of the main body frame at the tilt position or an oil amount of lubricating oil stored in the oil receiving device. The oil receiver according to claim 1.

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