CN1195914C - Lubricating device for sewing machine - Google Patents

Abstract

This invention provides an oiler for a sewing machine, that can adjust the quantity of oil supplied to a part requiring oiling (bobbin case), irrespectively of revolution of a sewing machine and smoothly regulate the quantity of oil supplied to the part requiring oiling. The oiler for the sewing machine has an oil tank 2 arranged in the head of the sewing machine, a plunger pump 4 driven by transmission of a driving force by the driving of the sewing machine and pumping up a lubricant from the oil tank 2 and supplying it to the bobbin case 9, an oil supply pipe 3 making the oil tank 2, the plunger pump 4 and the bobbin case 9 work in combination, and guiding the lubricant pumped up by the plunger pump 4 to the bobbin case 9, a circulation route 8 branching from the oil supply pipe 3, and returning some of the lubricant to be supplied to the bobbin case 9 to the oil tank 2. The circulation route 8 has an oil quantity adjusting section 7 adjusting the quantity of oil supplied to the bobbin case 9 by adjusting the quantity of oil flowing in the circulation route 8, and the oil supply pipe 3 has a filter removably attached to remove foreign matter in the oil supply pipe 3.

Description

Sewing machine oil supply device

technical field

The present invention relates to a sewing machine oil supply device for supplying oil to sliding parts such as a rotary hook of an industrial sewing machine.

Background technique

For example, in the hook portion of a sewing machine, lubricating oil is supplied to the mating portion of the inner hook and the outer hook so that the outer hook rotates uniformly with respect to the inner hook. As this oil supply method, there is a method of forcibly supplying oil by installing an oil pump that draws lubricating oil from the oil tank located on the sewing machine base, or by using the capillary phenomenon or surface tension between the oil tank and the oil supply point to supply oil to the hook. Point oil supply, that is, through the connection of the oil core, the lubricating oil is transferred in the oil core, and the oil is supplied from the oil tank to the oil supply point. The power used by these oil supply pumps is generally output from the main shaft of the sewing machine.

As an example of the above-mentioned lubricating device for supplying lubricating oil to the hook portion of the sewing machine, there is a technology disclosed in Japanese Utility Model Registration No. 2536954 shown in FIG. 4 .

The sewing machine oil supply device 100 of this publication is an oil tank 102 located in the base portion 101, which is connected to the hook portion 103, and an oil supply pump 104 driven by the rotation of the hook shaft 103a which drives the hook portion 103, and connected to the oil tank 102. The oil supply pipe 105 and the oil discharge pipe 106 of the oil supply pump 104 and the oil tank 102, the lubricating oil tank 107 that is located in the oil tank 102 and connected with the oil drain pipe 106, one end is immersed in the lubricating oil in the lubricating oil tank 107, and the other end is connected to the needle bar mechanism 108 and supply the twisted rope 109 of lubricating oil etc. to form.

In this sewing machine lubricating device 100, when the sewing machine is driven and the lubricating pump 104 is driven by the driving force of the hook portion 103 (rotation of the hook shaft 103a), the lubricating pump 104 supplies lubricating oil from the oil tank 102 through the lubricating pipe 105. The oil is drawn out, and a part of lubricating oil is supplied to the hook portion 103 through the oil supply passage in the hook shaft 103a, while the remaining lubricating oil is returned to the lubricating oil groove 107 in the oil tank 102 through the oil discharge pipe 106.

However, in the oil supply device 100 having the above structure, the amount of oil supplied to the hook portion 103 depends on the oil supply operation speed of the oil pump 104, that is, the rotation speed of the hook shaft 103a while the sewing machine is rotating.

Therefore, in the oil supply device 100 having the above configuration, if the amount of oil supplied to the hook portion 103 is to be changed, the rotational speed of the hook shaft 103a, that is, the driving speed of the sewing machine must be changed.

For this reason, the current situation is that the mechanism for adjusting the pipe diameter of the oil discharge pipe 106 that is separated from the hook portion 103 and should be recovered to the oil tank flows through is provided so that the rotational speed of the hook shaft (the speed of the sewing machine) is not changed. driving speed) to change the amount of oil supplied to the hook portion 103.

However, in the above structure, when the lubricating oil is drawn from the oil tank 102 by the oil pump 104, the foreign matter (impurity) mixed into the oil tank 102 is also drawn out, and it is blocked at the pipe diameter adjustment part, which may cause the pipe diameter to be incorrectly adjusted and supplied to the oil tank. The amount of oil at the oil point (hook portion 103) cannot be adjusted well.

Contents of the invention

In view of the above circumstances, the present invention provides an oil supply device for a sewing machine that can adjust the amount of oil supplied to an oil supply point (hook portion) regardless of the rotational speed of the sewing machine, and at the same time can uniformly adjust the amount of oil supplied to the oil supply point. .

In order to solve the above problems, the first aspect of the present invention is an oil supply device for a sewing machine. The oil supply device is provided with: for example, as shown in FIG. An oil pump (such as a plunger type oil pump 4) driven by a driving force that can extract lubricating oil from the above-mentioned oil tank and supply it to an oil supply point (for example, the hook portion 9) is connected to the above-mentioned oil tank, the oil pump, and the oil supply point respectively. The lubricating oil extracted from the above-mentioned oil tank is directed to the oil supply pipeline (for example, oil supply pipe 3) of the above-mentioned oil supply point, and a part of the lubricating oil supplied to the above-mentioned oil supply point is returned to the return line of the oil tank branched from the above-mentioned oil supply pipeline. Oil pipeline 8, installed on the above-mentioned oil return pipeline, adjusts the oil quantity flowing through the oil return pipeline to adjust the oil quantity supplied to the oil point (such as the oil quantity adjustment part 7), equipped with a The filter 5 installed on the above-mentioned oil supply pipeline in a detachable manner to filter foreign matter in the above-mentioned oil supply pipeline is characterized in that the filter has: two sides on the input side and output side of the lubricating oil A hollow main body part with an open end; used to install the oil pipes that constitute the above-mentioned oil supply pipeline, and are respectively detachably installed on the two openings of the main part to form a through hole through which lubricating oil flows; it is arranged in The above-mentioned filter member covering the through hole of the output side joint member in the main body.

According to the first aspect of the present invention, the oil quantity adjusting member for adjusting the amount of lubricating oil supplied to the above-mentioned oil supply point is installed on the oil return pipeline branched from the oil supply pipeline. The filter is installed freely on the road, so although the oil pump driven by the driving force transmitted from the driving device of the sewing machine structurally provides lubricating oil to the oil supply point, it can be connected with the drive of the oil pump, that is, to the oil pump. The amount of lubricating oil supplied to the oil supply point is adjusted independently of the driving force of the oil pump, and at the same time, the lubricating oil drawn by the oil pump can be filtered by the filter before the oil amount adjusting member.

Therefore, there is no phenomenon that lubricating oil mixed with foreign matter flows into the oil quantity regulating member and causes foreign matter to clog, and the oil quantity regulating member can correctly regulate the quantity of oil supplied to the oil supply point. In addition, it is possible to supply lubricating oil free from foreign substances (impurities) not only to the oil quantity adjustment member but also to the oil supply point.

According to the present invention, the filter is composed of a joint part, a main part, and a filter part. The main part is detachably mounted together with respect to the joint part. At the same time, the filter part is detachably arranged in the main part, so if When foreign matter in lubricating oil filtered out by the filter member accumulates in the main body, maintenance such as removing the main body to remove foreign matter and replacing the filter member is easy.

A second aspect of the present invention is the sewing machine oil supply device according to the first aspect of the present invention, wherein the oil pump is driven by the rotation of the hook shaft driven by the driving device of the sewing machine, and the oil supply point supplied by the oil pump is It is the hook part.

According to the second aspect of the present invention, in the oil amount adjusting member for adjusting the amount of oil supplied to the rotary hook, there is no lubricating oil flow phenomenon in which foreign matter is mixed in, and the amount of oil supplied to the rotary hook can be correctly adjusted to drive the rotary hook smoothly. department.

In addition, the above-mentioned filter is installed on the oil supply line before the rotary hook, so there is no phenomenon that the lubricating oil mixed with foreign matter flows in the rotary hook, and the rotary hook can be driven more smoothly.

The third aspect of the present invention is the sewing machine oil supply device according to the first aspect of the present invention, which is characterized in that, for example, as shown in FIG. It is composed of foreign matter accumulated inside.

According to the description of the third aspect of the present invention, the same effect as that of the invention described in any one of the first or second aspects of the present invention can be obtained. Therefore, just by looking at the main body parts, it is possible to easily confirm the timing of maintenance such as removing foreign matter.

Description of drawings

Fig. 1 is an overall configuration diagram showing an oil supply device for a sewing machine as an example to which the present invention is applied.

Fig. 2 is an enlarged view of a filter provided in the sewing machine oil supply device of the present invention shown in Fig. 1 .

Fig. 3 is a diagram showing a modified example of the filter.

Fig. 4 is a diagram showing a conventional sewing machine oil supply device.

Detailed ways

Next, an embodiment of an oil supply device for a sewing machine according to the present invention will be described with reference to FIGS. 1 to 3 . In addition, the sewing machine oil supply device according to the present invention is installed on an industrial sewing machine.

The sewing machine oil supply device 1 related to the present invention shown in Fig. 1 is composed of an oil tank 2 positioned in the sewing machine base, an oil supply pipe (oil supply pipeline) 3, a plunger type oil pump (oil pump) 4, a filter 5, an oil It is composed of quantity regulating part 7 and oil return pipeline 8.

The lubricating oil is stored in the oil tank 2 and connected with the plunger type oil pump 4 through the oil supply pipe 3 . A filter 5 is attached to the oil supply pipe 3 in order to filter the lubricating oil flowing through the oil supply pipe 3 .

As shown in FIG. 2 , on the filter 5 , detachable first and second joint members 51 and 52 are respectively fitted to both open ends 53 a and 53 b of a hollow cylindrical main body member 53 .

The first joint part 51 and the second joint part 52 have the same shape, and the inlay parts 51a, 52a and the outer circle part are respectively connected to the first supply tank connected to the lower part of the oil tank 2 in a sealed state by the outer circle part. The oil pipe 31 and the second oil supply pipe 32 connected to the plunger type oil pump 4 are the connecting parts 51b, 52b which are embedded in a closed state, and pass through these embedded parts 51a, 52a and connecting parts 52b, 53b, and are connected to the first oil supply pipe. The oil pipes 31, 32 are connected to each other through holes 51c, 52c.

The inner diameter (diameter between inner walls surrounding the through hole 51 c ) A of the first joint member 51 is smaller than the inner diameter B of the first oil supply pipe 31 connected thereto.

Here, the opening area of the first joint member 51, specifically, the cross-sectional area of the through hole 51c (the area surrounded by the inner wall) is smaller than the opening area of the first oil supply pipe 31 (the area inside the oil supply pipe 31). 1/2 of the cross-sectional area). Therefore, the cross-sectional area of the joint part on the input side of the filter is smaller than that of the oil supply line, so foreign matter entering the filter is difficult to return to the oil supply line on the input side, preventing foreign matter from flowing back.

The main body part 53 of this embodiment is made of a transparent resin tube, the inside of which can be observed from the outside.

In addition, the cross-sectional area (opening area) of the hollow portion inside the main body member 53 is larger than the opening area of the fuel supply pipe 3, preferably 1.5 to 8 times. In this structure it is about 8 times. Therefore, the filtering ability of the above-mentioned body member for lubricating oil can be improved.

The inner peripheral surface of the main body member 53 and the opposing surfaces of the first and second joint members 51 and 52 form a filter chamber 53c.

On the lubricating oil downstream side of the filter chamber 53c (upper in Fig. 2), a foam material 54 (filter member) for filtering the lubricating oil flowing through the main body part 53 is detachably provided, and on the lubricating oil upstream side of the filter chamber 53c (The lower part of Fig. 2) forms a space (foreign matter storage space).

The foam material 54 is generally a batt-like substance in which fibers used as a filter member are intertwined. Since the foam material 54 is provided in the main body part 53, that is, the filter cavity 53c, when the lubricating oil extracted from the oil tank 2 by the plunger oil pump 4 flows through the filter cavity 53c, foreign matter (lines) of the lubricating oil is mixed in the oil tank 2. first-class impurities) cannot pass through the foam material 54 and be stored in the space below the foam material 54 in the filter cavity 53c, only the lubricating oil flows to the plunger oil pump 4 side by the second joint part 52.

In this way, since the inside of the main body part 53 of the filter 5 can be observed from the outside, it is possible to confirm the accumulation of foreign matter (impurities) in the main body part 53, and the main body part 53 of the filter 5 can be easily removed from the first joint part. 51 or the second joint part 52, and take out the stored foreign matter.

The structure of the plunger type oil pump 4 located in the hook shaft bearing 92 is the same as the existing one, consisting of a plunger stop screw 41, a plunger spring 42, and a plunger 43, and the rotation of the hook shaft 91 drives the plunger 43 . By driving the plunger 43, lubricating oil is drawn from the oil tank 2 through the oil supply pipe 3, and at the same time supplied to the hook portion 9, part of the lubricating oil supplied to the hook portion 9 is supplied to the oil return line 8 for returning to the oil tank 2. .

The oil return line 8 is connected to the first oil return line 81 between the oil supply line for supplying oil to the hook portion 9 in the plunger type oil pump 4 and the joint part 82 installed on the oil quantity adjustment member 7 . The second oil return pipe 83 connecting the joint part 82 and the distribution part 84, the third oil return pipe 85 for connecting the distribution part 84 and the oil tank 2, the fourth oil return pipe 87 for guiding the lubricating oil from the distribution part 84 to the float chamber 86, The float chamber 86 is composed of a third oil supply pipe 88 for supplying lubricating oil to each oil supply point such as the needle bar of the sewing machine head 11. In addition, not shown in the figure, there is also a well-known mechanism for returning the remaining lubricating oil at each oil supply point of the sewing machine head 11 to the oil tank 2 .

The structure of the oil quantity regulating member 7 is the same as that of the conventional one, and the flow area of the first oil return pipe 81 is enlarged or reduced by rotating the knob portion 71 to adjust the flow rate of the first oil return pipe 81 .

That is, if the flow regulating member 7 increases the resistance of the lubricating oil flowing through the first oil return pipe 81 to reduce the flow rate of the first oil return pipe 81, the amount of oil supplied to the hook portion 9 by the plunger oil pump 4 increases. If the resistance of lubricating oil flowing through the first oil return pipe 81 is reduced to increase the flow rate of the first oil return pipe 81, the amount of oil supplied to the rotary hook portion 9 by the plunger oil pump 4 will decrease.

The bottomed cylindrical float chamber 86 is connected to the oil tank 2 through the connection pipe 25 connected to the bottom, and the fourth oil return pipe 87 is connected to the upper part of the cylinder wall. The float 86 a located inside the float chamber 86 moves up and down in the float chamber 86 according to the amount of oil in the oil tank 2 . The end of the oil quantity indicating rod 86b whose root is fixed on the float 86a protrudes from the top of the float chamber 86, and this end is inserted into the oil quantity indicating window 86c fixed on the sewing machine main body.

Therefore, the oil quantity of the oil tank 2 can be observed through the position of the end of the oil quantity indicating rod 86b in the oil quantity indicating window 86c.

In addition, a third oil return pipe 88 is connected directly below the connection portion of the float chamber 86 to the fourth oil return pipe 87 . The twisted rope 89 as the oil core is inserted in the third oil return pipe 88 , and its one end 89 a hangs in the float chamber 86 .

Therefore, the lubricating oil that flows into the float chamber 86 through the 4th oil return pipe 87 is absorbed by the end 89a of the twisted rope 89 below, and is passed through the twisted rope 89 to guide each oil supply point of the sewing machine head 11 (such as the connection with the needle bar mechanism). The part in contact with the needle bar, the contact part between the upper shaft and the bearing) to supply oil.

Next, the operation of the sewing machine oil supply device 1 of this embodiment will be described.

The rotary plunger oil pump 4 of the rotary hook shaft 91 draws lubricating oil from the oil tank 2 through the first oil supply pipe 31, the filter 5 and the second oil supply pipe 32, and supplies the lubricating oil to the connection between the rotary hook shaft 91 and the rotary hook shaft bearing 92. Oil is supplied to the hook portion 9 at the same time as the sliding portion is supplied with oil, and at the same time, a part of lubricating oil is supplied to the oil return line 8 to which the oil amount adjusting member 7 is attached.

At this time, because the lubricating oil extracted from the oil tank 2 by the plunger type oil pump 4 is filtered by the filter 5, impurities such as thread ends mixed in the oil tank will not be supplied to the sliding parts of the hook shaft 91 and the hook shaft bearing 92 and The rotary hook part 9, or the oil quantity adjustment part 7.

Therefore, since there is no impurity clogging phenomenon in the oil quantity adjusting part 7, there is no existing phenomenon that the oil quantity cannot be adjusted or the oil quantity adjustment is incorrect. In addition, in this sewing machine oil supply device 1, the amount of oil supplied to the hook portion 9 can be accurately and uniformly adjusted regardless of the rotation of the sewing machine.

Therefore, the filtered lubricating oil sent to the oil return line 8 is sent from the plunger type oil pump 4 to the first oil return pipe 81, the joint member 82, the second oil return pipe 83, and the distribution part 84, and part of it passes through the third oil return pipe. 82 returns to the oil tank 2, and a part is sent to the 4th oil return pipe 87 and the float chamber 86. A part of the lubricating oil sent to the float chamber 86 is absorbed by an end 89a of the twist rope 89, is sent to each oil supply point of the sewing machine head 11 through the 3rd oil supply pipe 88, and then returns to the oil tank 2. At this time, the lubricating oil has been filtered, so there is no phenomenon that it is blocked by foreign matter in the oil return line 8 . In addition, lubricating oil in the float chamber 86 that is not absorbed by the twist rope 89 is recovered to the oil return tank 2 through the connecting pipe 25 at the bottom. The lubricating oil thus recovered to the oil return tank 2 is driven and circulated by the plunger type oil pump 4 .

In the sewing machine oil supply device 1 having the above-mentioned structure, the filter 50 having the structure shown in FIG. 3 may be used instead of the filter 5 .

The filter 50 is composed of a main body part 53 having the same structure as that of the above-mentioned present embodiment, and is detachably fitted in the opening of the upstream side (below in FIG. 3 ) of the main body part 53, and the first oil supply on the side of the fuel tank 2. The first joint member 51 connected to the pipe 31 is detachably fitted in the opening on the downstream side (upper side in FIG. 3 ) of the main body member 53, and is connected to the second oil supply pipe 32 on the side of the plunger type oil pump 4. The second joint member 56 is constituted, and at the same time, the mesh member (filter member) 57 covering the protruding portion 56b in the main body member 53 is attached.

Therefore, the net member 57 covers the through hole 56d passing through the inlay portion 56a of the second joint member 56 and the protrusions 56b, 56c, filters the lubricating oil flowing through the filter 50, and sends only the lubricating oil to the output side, that is, On the plunger type oil pump 4 side, foreign substances (impurities) mixed into the lubricating oil are stored in the space below the mesh member 57 inside the main body member 53 .

In addition, although in the above embodiment, the filter 5 is located between the first oil supply pipe 31 and the second oil supply pipe 32, the present invention is not limited to this case, and it is installed on the oil quantity regulating member 7, the rotary hook Between the oil supply points such as the part 9 and the oil tank 2, as long as the lubricating oil from the oil tank 2 can be filtered structurally before the supply oil quantity regulating member 7 and the hook part 9, any structure can be used.

In addition, as for the foam and net members of the filter member, any material can be used as long as it is a material for filtering lubricating oil. Of course, other specific detailed structures can also be appropriately changed.

As described above, according to the sewing machine oil supply device according to the first aspect of the present invention, the oil quantity regulating member is installed on the oil return line branched from the oil supply line, and at the same time, because the above-mentioned oil supply line is detachable With a filter installed, the amount of oil supplied to the above-mentioned oil supply point can be adjusted regardless of the driving speed of the oil pump. At the same time, the lubricating oil pumped by the oil pump can be filtered by the filter before reaching the oil amount adjustment part of the oil return line. Filtration prevents lubricating oil mixed with foreign matter from flowing into the oil quantity adjustment part or clogging with foreign matter, and the oil quantity supplied to the oil supply point can be accurately adjusted.

According to the sewing machine lubricating device according to the second aspect of the present invention, lubricating oil mixed with foreign matter does not flow into the oil amount adjusting member for adjusting the amount of oil supplied to the hook, and the supply to the hook can be accurately adjusted. The amount of oil is sufficient to drive the rotary hook smoothly.

According to the sewing machine lubricating device according to the third aspect of the present invention, when foreign matter accumulates in the main body due to filtering lubricating oil flowing through the filter member, the main body of the filter can be easily removed from the joint member. This makes it easy to remove foreign matter and perform maintenance such as replacement of filter elements.

According to the sewing machine lubricating device according to the fourth aspect of the present invention, since the above-mentioned filter is constructed so that foreign matter accumulated inside can be observed, it is possible to easily confirm the maintenance timing for removing foreign matter by simply looking at the main body.

Claims (4)

1. lubricating device for sewing machine, described device comprises: the fuel tank that is positioned at sewing machine base; By the drive force that the driving of Sewing machines is transmitted, and can from above-mentioned fuel tank, extract lubricating oil and supply to oil pump to oil drop; Be communicated with above-mentioned fuel tank, oil pump respectively, give oil drop, the above-mentioned oil feed line of giving oil drop will be led by the lubricating oil that above-mentioned oil pump extracts; From above-mentioned oil feed line, branch away, will supply with the return line that an above-mentioned part of giving the lubricating oil of oil drop is returned fuel tank; The oil mass that is installed on the above-mentioned return line, is flowing in the return line by adjusting is regulated the fuel-flow control parts that supply to the oil mass of oil drop; Be installed on the above-mentioned oil feed line cleaner in order to the foreign matter in the above-mentioned oil feed line of filtering detachable; It is characterized in that:

This cleaner has: at the main element of the hollow of the both ends open of the input side of lubricating oil and outlet side; Be used for installing the oil pipe that constitutes above-mentioned oil feed line, be installed in joint component on two peristomes of main element, that form the through hole that flows through lubricating oil removably respectively; Be configured in the above-mentioned filter element that main part is interior, be covered with the through hole of outlet side joint component.

2. according to the lubricating device for sewing machine of claim 1 record, it is characterized in that oil pump is driven by the rotation of the rotary shuttle shaft that drive unit drove of Sewing machines, is rotating shuttle portion by the above-mentioned fuel feeding point of above-mentioned oil pump feed.

3. according to the lubricating device for sewing machine of claim 1 record, it is characterized in that the main element of above-mentioned cleaner can be observed the mode that accumulates in inner foreign matter and constitute during with the foreign matter in the above-mentioned oil feed line of filtering.

4. according to the lubricating device for sewing machine of claim 2 record, it is characterized in that the main element of above-mentioned cleaner can be observed the mode that accumulates in inner foreign matter and constitute during with the foreign matter in the above-mentioned oil feed line of filtering.

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