JP2000140476A - Cooling and lubricating device for sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of constituting members, to reduce manufacture and assembly costs and to stably keep a prescribed cooling and lubricating performance to a needle tip and a needle thread over the long period of time. SOLUTION: Oil storage tanks 3 and 6 are integrally formed at frame parts 1A and 1C projected forward from a sewing machine frame 1. An oil guiding member for guiding a cooling and lubricating oil stored in one oil storage tank 3 so as to be stuck to the tip part of a sewing machine needle by contact with the tip part and the oil guiding member for guiding the cooling and lubricating oil stored in another oil storage tank 6 so as to be stuck to the needle thread by the contact with the needle thread are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling and lubricating device for a sewing machine, and more particularly, to applying a cooling lubricating oil to the tip of a sewing machine needle during operation of the sewing machine, or to a needle thread supplied to the sewing machine needle. The present invention relates to a cooling lubrication device for a sewing machine configured to deposit cooling lubricating oil.

[0002]

2. Description of the Related Art When a sewing needle approaches a bottom dead center, the tip of the needle penetrates into an impregnating material of cooling lubricant, so that cooling lubricant is attached to the tip of the sewing needle to cool the sewing needle. The cooling lubrication device for sewing needles, which reduces the frictional resistance between the sewing material and the sewing needle by preventing the sewing needle from generating heat and extending the life of the sewing needle, is disclosed in, for example, Japanese Utility Model Publication No. It is conventionally known as disclosed in, for example, US Pat.

[0003] Further, when a cooling lubricating oil is applied to the needle thread supplied to the sewing machine needle in the middle of the supply path to cool and lubricate the needle thread, high-speed operation using heat-sensitive synthetic fiber is performed. Conventionally, a needle thread lubricating apparatus which prevents breakage of the thread and improves the passage of the needle thread to the sewn material is also known.

By the way, in both the conventionally known needle cooling lubrication device and the needle thread lubrication device, an oil storage tank for storing and replenishing cooling lubrication oil is manufactured separately from the sewing machine frame. Means for fixing the separate oil storage tank to the sewing machine frame via a screw or the like has been employed.

[0005]

However, in the conventional cooling and lubricating apparatus in which the oil storage tank is manufactured separately from the sewing machine frame and fixed to the sewing machine frame as described above, the number of constituent members increases accordingly. This not only increases the manufacturing and assembly costs, but also causes the oil storage tank itself to vibrate at a frequency different from that of the sewing machine frame due to the loosening of the oil storage tank screws and other fixed parts due to the effects of vibration and the like accompanying the sewing machine operation. As a result, the cooling lubricating oil is guided from the oil storage tank to the middle of the movement path of the sewing needle and the supply path of the needle thread, and the cooling lubricating oil is attached to the needle tip and the needle thread. The installed oil feed pipe and oil impregnated material may fluctuate or sway, impeding the adhesion of lubricating oil to the needle tip or needle thread, and deteriorating the specified cooling and lubrication performance during long use. There is a problem in that.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made to reduce the manufacturing and assembling costs and to provide a cooling lubrication system for a sewing machine capable of maintaining a predetermined cooling lubrication performance stably for a long period of time. It is intended to provide a device.

[0007]

To achieve the above object, a cooling lubrication device for a sewing machine according to the present invention comprises an oil storage unit integrally formed on a sewing machine frame and a cooling lubrication oil stored in the oil storage unit. An oil guide member that guides the oil supply member to an intermediate part of at least one of the movement path of the sewing needle and the supply path of the needle thread. It is characterized in that it is configured to be attached to a sewing needle and / or a needle thread.

According to the present invention having the above-described structure, the oil storage portion for storing the cooling lubricating oil necessary for cooling and lubricating the sewing needle and / or the needle thread is formed integrally with the sewing machine frame. In addition, compared to a case where an oil storage tank is manufactured separately from the sewing machine frame and the oil storage tank is fixed to the sewing machine frame, the number of constituent members and the number of assembly steps can be reduced. Further, since the oil storage part is a part of the sewing machine frame, even if it is affected by vibrations accompanying the operation of the sewing machine, the oil storage part vibrates integrally with the sewing machine frame, so that the oil guide member and the sewing machine needle And / or the state of contact with the needle thread is always stably maintained, and a predetermined cooling and lubricating performance can be secured.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a sewing machine needle cooling / lubricating device (needle tip cooling device) A provided in an overlock sewing machine to which the present invention is applied and a configuration in the vicinity thereof;
FIG. 2 is a perspective view showing a configuration of a needle thread lubricating apparatus B provided in the overlock sewing machine and the vicinity thereof, and FIG. 3 is an external perspective view of a sewing machine frame 1 in the overlock sewing machine.

In the sewing machine frame 1, a thick frame portion 1A having a flat upper surface is formed integrally with the left side of the sewing machine frame 1 below the needle plate 2 shown in FIG. I have. A first oil storage tank 3 for storing cooling lubricating oil is formed in an upward opening state by drilling a bottomed hole having an appropriate depth downward from the upper surface of the protruding thick frame portion 1A.

A plurality of needles attached to the main frame portion 1B of the sewing machine frame 1 in which a main operating mechanism such as a main shaft (not shown) is installed as shown in FIG. Between one of the needle thread tension adjusters 4 (commonly called thread tensioner) 4 and the needle thread reeling lever (commonly known as thread path) 5, a cubic shape is formed toward the front (operator side). Frame portion 1C is integrally formed so as to protrude. This cubic protruding frame portion 1C
In addition, a second oil storage tank 6 for storing cooling lubricating oil is formed in an upward opening state by forming a bottomed hole having an appropriate depth downward from the upper surface thereof.

A cap 7 is removably fitted to the opening of the first oil storage tank 3, and one end of an oil feed pipe 8 as shown in FIG. Communication is established. A cylindrical lubricator 9 is connected to the other end of the oil supply pipe 8, and a cooling lubricating oil impregnated material 10 such as a felt is provided inside the cylindrical lubricator 9, with only its tip portion outward. The cooling lubricating oil stored in the first oil storage tank 3 is moved by the sewing machine needle 12 by the oil supply pipe 8, the cylindrical lubricator 9, and the cooling lubricating oil impregnated material 10, which are filled and held in an exposed state. An oil guide member for guiding to the path is configured. By fixing the tubular oiler 9 of the oil guide member to the lower part of the needle plate 2 via the bracket 11, when the sewing machine needle 12 descends to near the bottom dead center as shown in FIG. The needle tip cooling device A is configured such that the needle tip 12a enters the cooling lubricating oil impregnated material 10 and makes the cooling lubricating oil moistened in the impregnating material 10 adhere to the tip 12a of the sewing machine needle 12. .

An L-shaped bracket 1 is provided on the upper surface of the cubic projecting frame portion 1C forming the second oil storage tank 6.
The lower end portion of the L-shaped bracket 13 is immersed in the cooling lubricating oil stored in the second oil storage tank 6, and the lubricating oil is supplied to the uppermost portion by capillary action. An oil guide member 14 made of, for example, felt or nonwoven fabric, which can be kept in a wet state, is provided therein. The oil guiding member 14 causes the needle thread 15 to face the middle of the supply path of the needle thread 15 to the sewing needle 12 from the leftmost needle thread tension adjuster 4 to the needle thread feed lever 5. Cooling lubricating oil that is in contact with and wet
The needle thread lubricating device B to be attached to the fifth thread 5 is constituted.

As shown in FIG. 1, a differential feed adjusting device 16 is provided on the left side of the protruding thick frame portion 1A of the needle tip cooling device A in which the oil storage tank 3 is integrally formed.
Is installed. The differential feed adjusting device 16 adjusts the feed amount of a feed dog (not shown) by vertically moving a lever 17 that projects forward, and loosens an adjustment nut 18 that projects to the left side. 17 is configured to be movable and fixed at a predetermined position by tightening an adjustment nut 18.

According to the overlock sewing machine equipped with the needle tip cooling device A and the needle thread lubrication device B as described above, when the sewing needle 12 descends with the sewing operation and reaches near the bottom dead center, the needle tip 12a Enters the cooling lubricating oil impregnated material 10, and the cooling lubricating oil moistened in the impregnated material 10 adheres to the tip 12 a of the sewing needle 12. As a result, the sewing needle 12 is cooled, and in the next descending step, the needle tip 12a to which the cooling lubricating oil is attached penetrates the sewn cloth. The frictional resistance with the sewing cloth is reduced, and the heat generation of the sewing needle 12 is suppressed.

On the other hand, the needle thread 15 is continuously supplied to the sewing machine needle 12 via the needle thread tension adjuster 4 and the needle thread reeling lever 5, and at this time, the needle thread 15 reaches the needle thread reeling lever 5. In the middle of the needle thread supply path, the oil guide member 14 comes into surface contact with the needle thread 15, and the cooling lubricating oil that is wet to the oil guide damaging material 14 adheres to the needle thread 15. Thereby, even when the overlock sewing machine is operated at a high speed using a synthetic fiber which is weak to heat as the needle thread 15, it is possible to prevent the needle thread 15 from being cut or the needle hole from being broken, and to sew. The needle thread 15 can smoothly pass through the cloth.

As described above, the first and second oil storage tanks 3 and 6 of the needle tip cooling device A and the needle thread oil supply device B which exhibit a cooling and lubricating function for the sewing needle 12 and the needle thread 15 are integrally formed with the sewing machine frame 1. As a result, the number of components is reduced compared to a case where an oil storage tank manufactured separately from the sewing machine frame is It is possible to reduce man-hours. Further, since the first and second oil storage tanks 3 and 6 are a part of the sewing machine frame 1, even if the first and second oil storage tanks 3 and 6 are affected by vibrations or the like accompanying the sewing operation, each of the oil storage tanks 3 and 6 is not affected.
6 vibrates integrally with the sewing machine frame 1, so that the relative positional relationship between the cooling lubricating oil impregnated material 10 serving as an oil guiding member and the sewing needle 12 and the relative positional relationship between the oil guiding member 14 and the needle thread 15 are always constant. As a result, the contact state between the two can be maintained stably, and the predetermined cooling and lubricating performance can be ensured stably even during long-term use.

In particular, since the oil storage tank 3 in the needle tip cooling device A is formed integrally with the sewing machine frame 1, the oil storage tank 3 is different from the case where a separate oil storage tank is fixed to the sewing machine frame in the left side portion of the sewing machine frame 1. When the dynamic feed adjusting device 16 is provided, the differential feed adjusting device 16 can be mounted at a position where the adjusting operation can be easily performed without the separate oil storage tank being in the way. Also, a neat configuration can be obtained.

In the above embodiment, both the oil storage tank 3 of the needle tip cooling device A and the oil storage tank 6 of the needle thread oil supply device B are integrally formed with the sewing machine frame 1. Only one oil storage tank 3 or 6 may be formed integrally with the sewing machine frame 1. In this case, as described above, it is preferable to form the oil storage tank 3 of the needle tip cooling device A integrally with the sewing machine frame 1, which also has the advantage of simplifying the structure for connection with the differential feed adjusting device 16.

Further, in the above embodiment, the present invention is applied to the overlock sewing machine, but it is needless to say that the present invention may be applied to any other sewing machine.

[0021]

As described above, according to the present invention, the oil storage portion for storing the cooling lubricating oil necessary for cooling and lubricating the sewing machine needle and / or the needle thread is formed integrally with the sewing machine frame. Is compared to the conventional one that fixes the oil storage tank manufactured separately to the sewing machine frame,
The number of components and the number of assembling steps can be reduced, so that manufacturing and assembling costs can be reduced. In addition, since the oil reservoir is only a part of the sewing machine frame, the oil reservoir does not rattle to the sewing machine frame or vibrate separately even if it is affected by vibrations accompanying the operation of the sewing machine. Since it vibrates integrally, the contact state between the oil guide member and the sewing machine needle and / or the needle thread is always kept in a stable state,
There is an effect that predetermined cooling lubrication performance can be stably maintained over a long period of time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sewing machine needle cooling / lubricating device (needle tip cooling device) provided in an overlock sewing machine to which the present invention is applied, and a configuration in the vicinity thereof.

FIG. 2 is a perspective view showing a configuration of a needle thread lubrication device provided in the overlock sewing machine and a configuration in the vicinity thereof;

FIG. 3 is an external perspective view of a sewing machine frame of the overlock sewing machine.

FIG. 4 is an enlarged perspective view of a main part showing a specific configuration of the sewing machine needle cooling lubrication device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sewing machine frame 1A protruding thick frame portion 1C cubic protruding frame portion 2 needle plate 3 first oil storage tank (oil storage section) 4 needle thread tension adjuster 5 needle thread reeling lever 6 second oil storage tank (oil storage section) 8 Oil feed pipe (component of oil guide member) 9 cylindrical oiler (component of oil guide member) 10 cooling lubricating oil impregnated material (component of oil guide member) 12 sewing machine needle 14 belt-shaped oil guide member 15 needle thread A needle Pre-cooling device B Needle thread lubrication device

Claims (1)

[Claims] An oil storage unit formed integrally with a sewing machine frame; and an oil guide for guiding cooling lubricating oil stored in the oil storage unit to an intermediate portion of at least one of a movement path of a sewing needle and a supply path of a needle thread. A sewing machine needle and / or a needle thread, the cooling lubricating oil being attached to the sewing machine needle and / or the needle thread. Cooling lubrication device.