JP2003144787A - Lubricating device in double needle sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricating device in a double needle sewing machine provided with an oil tank capable of returning circulation oil from two hook saddles at favorable balance. SOLUTION: In a pedestal part of the double needle sewing machine, a drive transmission mechanism and a main tank are disposed. The main tank of a large capacity can thus be disposed. A circulation tank having an air hole at an upper part and a circulation pump are provided to be positioned under hook parts. Excessive oil in the hook parts is thus returned to the main tank while keeping balance of oil feed quantity to the two hook parts in this lubricating device in the double needle sewing machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device provided in a two-needle sewing machine.

[0002]

2. Description of the Related Art Sewing machine mechanisms have parts that require lubricating oil, such as parts that operate heavily, and many sewing machines are equipped with an oil supply device so that these parts are constantly supplied with oil. For example, in a hook portion of a sewing machine, lubricating oil is supplied to a fitting portion or the like of an inner hook and an outer hook to smoothly rotate the outer hook with respect to the inner hook. In addition, as a method of refueling, a pump is installed and forced to feed lubricating oil, or a method of connecting through an oil core and transmitting lubricating oil to this oil core and feeding it from the oil tank to the refueling point of the kettle Etc. Further, in the conventional direct drive sewing machine, the main tank for storing the lubricating oil is arranged in the bed. Furthermore, for example,
As shown in FIG. 3, in the conventional two-needle sewing machine 200, there is no forced reflux mechanism from the shuttle shaft bases 201, 201,
The oil supplied to the shuttle headstocks 201 and 201 is
01, 201 was naturally dropped to the oil pan 203 provided below.

[0003]

The above-mentioned conventional techniques have the following problems. First, in the conventional direct drive sewing machine, since the main tank is arranged under the bed and the space of the bed portion is small, it is not possible to secure a sufficient capacity in the main tank. Second, 2
In this needle sewing machine, in order to change from the oil pan system to the oil tank system, it was necessary to forcibly return the reflux oil from both the left and right shuttle shafts 201, 201 to the oil tank. Left and right hook headstocks 201, 201
It was difficult to balance the refueling of 01. The present invention has been made in view of the above problems, and in a two-needle sewing machine provided with an oil tank, provides an oil supply device for a two-needle sewing machine in which reflux oil is circulated from two shuttle shaft stocks in a well-balanced manner. The purpose is to do.

[0004]

In order to solve the above-mentioned problems, the invention of claim 1 is, for example, as shown in FIG. 1 or FIG. 2, a standing leg portion 102 standing on a sewing machine bed 101, and this standing leg portion 102. An arm 103 that extends in a substantially horizontal direction along the sewing machine bed 101 from which an upper shaft 111 is arranged, and a sewing machine that is arranged on the standing leg 102 side of the arm 103 and drives the upper shaft 111. A two-needle sewing machine oil supply device (1) provided on a two-needle sewing machine (100) equipped with a motor (113) and supplying oil to shuttles (105, 105) of the two-needle sewing machine (100). The tank 106 is characterized in that it is arranged in the standing leg portion 102.

According to the invention of claim 1, the standing leg portion 102.
2 including the arm 103 and the sewing machine motor 113
Since the main tank 106 that stores the oil to be supplied to the shuttles 105, 105 of the two-needle sewing machine 100 is arranged in the standing leg portion 102 of the main needle sewing machine, a space with a relatively large margin is provided in the standing leg portion 102. Since the main tank 106 is arranged, the capacity of the main tank 106 can be increased and the storage amount of oil can be increased. Therefore, the two hook portions 105, 1 provided in the two-needle sewing machine 100 are
The oil consumed by 05 can be stored sufficiently. Particularly, in the direct drive sewing machine, the sewing machine motor 11
Since there is a relatively generous space below 3,
The main tank 106 having a large capacity can be arranged in the space, and the space can be effectively utilized.

According to a second aspect of the present invention, in the oil supply apparatus 1 for a two-needle sewing machine according to the first aspect, the internal space of the standing leg portion 102 is divided into two parts, and one space inside the divided leg part 102 is divided into two spaces. A drive transmission mechanism (for example, a timing belt 120 or the like) that connects the upper shaft 111 and the lower shaft 107 arranged in the sewing machine bed 101 and transmits the driving force of the upper shaft 111 to the lower shaft 107 is arranged. The main tank 106 is arranged in the other space.

According to the second aspect of the present invention, the drive transmission mechanism for transmitting the drive force of the upper shaft 111 to the lower shaft 107 and the main tank 106 are arranged in the internal space of the standing leg portion 102. The space in the section 102 can be effectively utilized, and the main tank 106 having a sufficient capacity can be arranged.

According to a third aspect of the present invention, in the oil supply device 1 for a two-needle sewing machine according to the first or second aspect, an oil supply port 108a for injecting oil into the main tank 106 is provided,
The lubrication port 108a is formed in the upper part of the arm 103.

According to the third aspect of the invention, the oiling portion 108
Since it is formed on the upper part of the arm 103, oil can be smoothly injected into the main tank 106. Also,
Since the oil injection port 108a is located at the upper portion, when oil adheres to the periphery of the oil injection port 108a during oil injection, the standing leg portion 10
2 and prevents the standing leg portion 102 from being soiled. When the sewing machine bed 101 is opened, the standing leg portion 102 may be tilted in the front-back direction.
By forming 8a on the upper part of the arm 103, it is possible to prevent the stored oil from flowing back and flowing out from the oil inlet 108a.

According to a fourth aspect of the present invention, in the oil supply device 1 for a two-needle sewing machine according to any one of the first to third aspects, the main tank 106 is formed of a translucent member, and is internally formed. The standing leg portion 102 in which the main tank 106 is arranged is formed with a cutout portion 102a which is cut out in a vertical direction corresponding to the height of the main tank 106, and the amount of oil inside the main tank 106 is cut through the cutout portion 102a. The feature is that you can see.

According to the invention of claim 4, the main tank 1
No. 06 is formed by a translucent member, and the standing leg portion 102 in which the main tank 106 is arranged is cut out in a vertical direction corresponding to the height of the main tank 106 to form a cutout portion 102a. Since it is equipped with
From the outside of 02, the amount of oil inside the main tank 106 can be visually recognized through the notch 102a. Therefore, the storage amount of the main tank 106 can be easily confirmed with a simple configuration.

According to a fifth aspect of the present invention, in the oil supply device for a two-needle sewing machine according to any one of the first to fourth aspects, the hook portion 1 is provided.
Between the tanks 05 and 105 and the main tank 106, a recirculation tank 109 for storing oil that recirculates from the kettle portion via a flow path (for example, a pipe r), and the recirculation tank 109.
And a reflux pump 110 for returning the oil stored in the main tank 106 to the main tank 106.

According to the invention of claim 5, the hook portions 105, 1
Since a recirculation tank 109 and a recirculation pump 110 are provided between 05 and the main tank 106, oil is recirculated to the recirculation tank 109 via the flow path r through which the oil from the kettle units 105, 105 recirculates. It can be stored, and the oil stored in the reflux tank 109 can be returned to the main tank 106 by the reflux pump 110. Therefore, the surplus oil supplied to the hook portions 105, 105 can be returned to the main tank 106, and the efficiency of oil utilization can be improved, and the surplus oil in the case of being naturally dropped in the oil pan can be treated. Can be reduced.

According to a sixth aspect of the present invention, in the oil supply device 1 for a two-needle sewing machine according to the fifth aspect, an air hole 109a is formed in an upper portion of the recirculation tank 109, and the recirculation tank 10 is provided.
9 is arranged below the shuttles 105, 105.

According to the invention of claim 6, the reflux tank 10
Since an air hole 109a is formed in the upper part of 9 and the reflux tank 109 is arranged below the hook portions 105, 105, the flow path r does not form a closed path, and the hook portions 105, 10
The excess oil of No. 5 naturally flows downward and collects in the reflux tank 109. Further, since the air holes 109a do not apply a pressure to the hook portions 105, 105,
The oil can be recirculated without affecting the oil supply to the two hook portions 105, 105 and without disturbing the balance of the amount of oil supplied to the two hook portions 105, 105.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An oil supply device for a two-needle sewing machine according to the present invention will be described below with reference to the drawings. The refueling device according to the present embodiment is a well-known two-needle sewing machine 1 in which needles (not shown) are provided at the lower ends of a pair of needle bars (not shown).
To prepare for 00. The two-needle sewing machine 100 is shown in FIG.
As shown in FIG. 2 and FIG. 2, two substantially parallel seams are formed, and a standing leg portion 102 erected on the sewing machine bed 101 and an arm 103 extending horizontally from the standing leg portion 102. Of the sewing machine motor 113, which is arranged on the side of the standing leg portion 102 of the sewing machine, which drives the upper shaft 111, and a sewing machine needle (not shown) for forming stitches in cooperation with the sewing machine motor 10.
5, 105 constitutes a main part.

Although not shown, the hook portions 105, 105 are composed of an outer hook and an inner hook fitted into the outer hook. The sewing machine motor 1 for rotating the upper shaft 111 is similar to the conventional one.
It is driven by 13 and rotates.

The output shaft of the sewing machine motor 113 is connected to the upper shaft 111 via a connecting body (not shown). Then, the upper shaft sprocket 120 provided on the upper shaft 111
And a lower shaft sprocket 122 provided on the lower shaft 107.
A timing belt 121 is stretched around the lower shaft 107, and the rotational force of the upper shaft 111 that is rotationally driven by the sewing machine motor 113 is transmitted through the timing belt 121 to rotate the lower shaft 107. When the upper shaft 111 rotates, a balance (not shown) swings and a needle bar holding a sewing needle (not shown) at its tip moves up and down. Also, the lower shaft 10
When 7 rotates, the shuttle shaft (not shown) that meshes with the lower shaft 107 rotates in the opposite direction to the lower shaft 107, and the shuttle rotates or rotates.

As shown in FIGS. 1 and 2, the oil supply device 1 for the two-needle sewing machine 100 according to the present embodiment has a main tank 106 for containing oil, a hook 105,
Oil supply device for supplying oil to various places including 105 (not shown)
A recirculation tank 109 that stores oil via a flow path r through which excess oil recirculated from the kettle units 105 and 105, and a recirculation pump 110 that returns the oil stored in the recirculation tank 109 to the main tank 106. The main part is composed of. Then, the hook portions 105, 105 and the reflux tank 10
9, the reflux pump 110, and the main tank 106,
It is connected via a flow path r through which oil flows back.

An oil groove for guiding oil to a sliding portion with the inner hook is formed in the outer hook, and this oil groove is formed in the hook section 10.
It communicates with the fueling port formed in 5,105.

In the inner space of the standing leg portion 102, the upper shaft 111
A timing belt 121 (drive transmission mechanism) that connects the lower shaft 107 to the main shaft 106 is arranged.
Are arranged. The main tank 106 is formed of a translucent member, and on the front surface side of the exterior of the standing leg portion 102, a notch portion 102a is formed by vertically notching in correspondence with the height of the main tank 106. It is formed, and the amount of oil in the main tank 106 can be confirmed from the outside of the standing leg portion 102.

Further, a lubrication port 108 is provided on the upper part of the arm 103.
The pipe-shaped lubrication part 108 having a is the main tank 1
It is arranged so as to communicate with 06. Therefore, oil is injected into the main tank 106 from the oil injection port 108a.

The reflux tank 109 is composed of the hook portions 105, 105.
It is located further below and is connected to the hook portions 105, 105 via a flow path r formed of a tubular pipe. Further, since the air hole 109a is formed in the upper portion of the reflux tank 109, the hook portion 10 is formed by the air hole 109a.
Air in the oil flow path from 5, 105 is released. As a result, the excess oil supplied to the shuttles 105, 105 passes through the pipe r (flow path) and is located below the reflux tank 1
It naturally flows into 09. The oil that has flowed in is in the reflux tank 1
It is stored in 09.

The reflux pump 110 is composed of a plunger pump. The plunger pump 110 (reflux pump) has the same configuration as the conventional one, and the lower shaft 107
And a plunger (not shown) is driven by rotating the lower shaft 107. This plunger pump 110
Driven by the plunger, the oil tank 1
The oil is sucked up from 06 through the oil supply pipe, and the hook portion 10
The oil stored in the reflux tank 109 is returned to the oil tank 106 while being supplied to the oil tanks 5, 105.

Next, the operation of the oil supply device 1 for the two-needle sewing machine in this embodiment will be described. Oil tank 1
In the two-needle sewing machine 100, 06 is interlocked with a portion having a large movement, for example, the upper shaft 111 of the sewing machine,
The sliding parts (not shown) of the hook shaft and the hook bearing for driving the hooks 5, 105, and the hook portions 105, 1 in which the inner hook and the outer hook make frictional contact.
The oil to be supplied to the oil supply point such as 05 is stored, and the oil in the oil tank 106 is sucked up by a plunger pump (not shown) that is interlocked with the upper shaft via an oil supply pipe (not shown).

The sucked oil is supplied to each place including the shuttles 105, 105 by a supply passage (not shown), and each mechanism operates smoothly. Of these, the hook portions 105, 105
Excess oil of the oil supplied to the
It flows into the pipe r connected to the pipe 5, and naturally flows downward from the pipe r to reach the reflux tank 109. The amount of oil stored in the reflux tank 109 is equal to that of the plunger pump 1.
It is sucked up into the main tank 106 by 10 (reflux pump).

According to the oil supply device for a two-needle sewing machine of the present embodiment, the main tank 106 is arranged in the standing leg portion 102 of the two-needle sewing machine, so the supply device provided with the main tank 106 having a relatively large capacity. Therefore, it is possible to store a sufficient amount of oil that can be supplied to the two shuttles 105, 105 provided in the two-needle sewing machine. Further, since the main tank 106 is formed of a translucent member, and the main tank 106 can be seen from the cutout portion 102a formed in the standing leg portion 102, the amount of oil inside the main tank 106 can be easily confirmed.

Further, the reflux tank 109, which is disposed below the hook portions 105, 105 and has the air holes 109a formed in the upper portion, is connected to the hook portions 105, 1 via the pipe r (flow path).
Since it is connected to the oil tank 05, the excess oil supplied to the shuttles 105, 105 can be naturally recirculated and stored in the recirculation tank 109. At this time, the two hook portions 105,
It does not affect the balance of refueling to 105.
Further, the oil stored in the reflux tank 109 is supplied to the main tank 10 by the plunger pump 110 (reflux pump).
It becomes possible to return to 6. Therefore, excess oil of the oil once supplied can be returned to the main tank 106 again.

The present invention is not limited to the examples shown in the above-mentioned embodiments, and may be appropriately modified without departing from the scope of the present invention. For example, in the present embodiment, the timing belt 120 was used as the driving means, but a non-circular gear is provided on the lower shaft, and this non-circular gear is meshed with the non-circular gear of the main shaft, so that the lower shaft is directly connected to the lower shaft. The driving force may be transmitted to the.

Further, although the flow path from the hook portions 105, 105 to the reflux pump 109 is the tubular pipe r, it may be constituted by an oil core which allows the oil to permeate the felt material to flow.

Further, although the main tank 106 is formed of a translucent member, for example, only one side surface of the main tank 106 may be formed of a translucent member, The point is that the position where the inside of the main tank 106 can be visually recognized from the cutout portion 102a formed in the standing leg portion 102 may be formed by a translucent member.

[0032]

According to the invention of claim 1, since the main tank is arranged in the standing leg portion of the two-needle sewing machine including the standing leg portion, the arm, and the sewing machine motor, the capacity of the main tank is reduced. It is possible to increase the oil storage amount and increase the oil storage amount. Therefore, the oil consumed by the two hook portions provided in the two-needle sewing machine can be sufficiently stored.

According to the second aspect of the present invention, the same effect as that of the first aspect can be obtained, and the drive transmission mechanism and the main tank are arranged in the internal space of the standing leg. Therefore, it is possible to effectively use the space in the standing leg portion and to arrange the main tank having a sufficient capacity.

According to the invention of claim 3, not only the same effects as those of claim 1 or 2 can be obtained, but also since the oil injection port formed in the upper part of the arm is provided, oil can be used as the main oil. Can be smoothly injected into the tank.
Then, it is possible to prevent the oil adhering to the periphery of the lubrication port from dripping on the outer wall surface of the standing leg portion and to lubricate the standing leg portion without polluting it.

According to the invention of claim 4, not only the same effect as that of any one of claims 1 to 3 can be obtained, but also the main tank formed of the translucent member has the cutout portion. The oil amount stored in the main tank can be easily confirmed with a simple configuration, because the oil is stored in the standing leg. Therefore, the main tank 1
The storage amount of 06 can be confirmed.

According to the invention of claim 5, not only the same effects as those of claims 1 to 4 can be obtained, but also a reflux tank provided between the hook portion and the main tank and a reflux pump. With this, the oil from the shuttle can be stored in the return tank via the flow path, and the stored oil can be returned to the main tank by the return pump. Therefore, it is possible to improve the oil utilization efficiency and reduce the processing of the surplus oil when the oil is naturally dropped in the oil pan.

According to the invention of claim 6, not only the same effect as that of claim 5 can be obtained, but also an air hole is formed in the upper part of the reflux tank and the reflux tank is arranged below the hook part. Therefore, the excess oil in the hook portion naturally flows downward in the flow path and collects in the reflux tank. Further, the air holes prevent the balance of the amount of oil supplied to the two hook portions of the two-needle sewing machine from being lost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an oil supply device for a two-needle sewing machine according to the present invention.

FIG. 2 is a schematic cross-sectional view showing an example of an oil supply device for a two-needle sewing machine according to the present invention.

FIG. 3 is a schematic exploded view showing processing of oil in a hook portion of a conventional two-needle sewing machine.

[Explanation of symbols]

1 lubricator 100 2-needle sewing machine 101 sewing machine bed 102 Standing part 103 arm 105 hook 106 Main tank 107 Lower shaft 108a Lubrication port 109 reflux tank 109a air hole 110 reflux pump 111 Upper axis 113 sewing machine motor 121 Timing belt (drive transmission mechanism) r flow path

Claims (6)

[Claims] 1. A standing leg portion erected on a sewing machine bed, an arm extending from the standing leg portion in a substantially horizontal direction along the sewing machine bed, and an upper shaft arranged inside, and a standing leg portion of this arm. A two-needle sewing machine provided on a two-needle sewing machine having a sewing machine motor for driving the upper shaft, and supplying oil to a hook portion of the two-needle sewing machine, An oil supply device for a two-needle sewing machine, characterized in that a main tank that stores the oil supplied to the shuttle portion is arranged in the standing leg portion. 2. The oil supply device for a two-needle sewing machine according to claim 1, wherein the interior space of the stance leg is divided into two parts, and the upper shaft and the sewing machine bed are provided in one space inside the divided stance part. A drive transmission mechanism that connects the arranged lower shaft and transmits the driving force of the upper shaft to the lower shaft is arranged, and the main tank is arranged in the other space. Refueling device for needle sewing machine. 3. The lubrication device for a two-needle sewing machine according to claim 1 or 2, further comprising: an oil inlet for injecting oil into the main tank, the oil inlet being formed in an upper portion of the arm. A unique two-needle sewing machine oil supply device. 4. The oil supply device for a two-needle sewing machine according to claim 1, wherein the main tank is formed of a translucent member, and the main tank is arranged inside the main tank. The standing leg has a notch formed in the vertical direction corresponding to the height of the main tank, and the amount of oil in the main tank can be visually confirmed through the notch, and the refueling of a two-needle sewing machine is possible. apparatus. 5. The oil supply device for a two-needle sewing machine according to any one of claims 1 to 4, wherein oil flowing back from the hook portion via a flow path is stored between the hook portion and the main tank. A refueling device for a two-needle sewing machine, comprising: a recirculation tank; and a recirculation pump for returning the oil stored in the recirculation tank to the main tank. 6. The oil supply device for a two-needle sewing machine according to claim 5, wherein an air hole is formed in an upper portion of the reflux tank, and the reflux tank is disposed below the shuttle portion. A refueling device for a 2-needle sewing machine.