JP2541125Y2 - Sewing machine cloth feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention relates to a mechanism for supplying lubricating oil to a mechanism for reciprocating a feed bar on which a feed dog is mounted. The present invention relates to a cloth feeding device for a sewing machine having a cover.

(Prior Art) For example, in an overlock sewing machine, a feed base to which a feed dog is attached at the tip is formed in such a form that the tip projects out of the sewing machine frame through an opening formed on one side wall of the sewing machine frame. A feed mechanism is provided in the sewing machine frame, and a feed mechanism for causing the feed table to perform a feed motion is provided in the sewing machine frame. As is well known, the feed mechanism is provided near the main shaft of the sewing machine and converts a unidirectional rotation of the main shaft into a reciprocating motion. And a feed mechanism for reciprocating the table. The motion conversion mechanism is configured to include a double eccentric wheel and a feed rod attached to the main shaft, and these slide violently with the rotation of the main shaft. Is supplied. In this case, since the lubricating oil is scattered by the operation of the motion conversion mechanism, a cover is provided so as to cover the motion conversion mechanism from above. This cover is configured to cover the upper half of the motion conversion mechanism.

(Problems to be Solved by the Invention) By the way, conventionally, if the lubricating oil is prevented from being scattered from the upper half of the motion conversion mechanism, the adhesion of the lubricating oil to the surrounding portion is effectively prevented. The cover has a structure that covers the upper half of the motion conversion mechanism.

However, in a sewing machine provided with this kind of cover, lubricating oil sometimes slightly oozes from a mouth portion for leading a leading end of a feed bar to the outside of a sewing machine frame. As a countermeasure for this, the sealing of the mouth portion is reinforced, but it has not been satisfactory.

When the cause of the oozing of the lubricating oil from the mouth was investigated, the following was found. The lubricating oil coming out of the upper part of the motion converting mechanism is shielded by the cover, but the lubricating oil coming out of the lower part of the motion converting mechanism scatters around. This lubricating oil may adhere to the side surface of the feed base or the inner surface of the wall where the mouth is located. When the lubricating oil adheres to the side surface of the feed table, the lubricating oil easily travels along the side surface of the feed table and reciprocates to reach the sealing portion of the mouth. However, since the sealing performance with respect to the side surface of the feed table is structurally difficult to be strengthened unlike the upper surface and the lower surface, the lubricating oil easily oozes out. Further, when lubricating oil adheres to the inner surface of the wall where the mouth is located, the lubricating oil penetrates between the seal holding member and the wall by capillary action and reaches the sealing portion of the mouth. As can be seen, the scattering of the lubricating oil from the motion converting mechanism, particularly toward the feed plate, and the scattering of the lubricating oil toward the inner surface of the wall where the mouth is present were not negligible.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cloth feeding device for a sewing machine that can prevent the lubricant oil from oozing out from a feed-out port of a sewing machine frame. .

[Structure of the Invention] (Means for Solving the Problems) In the sewing machine cloth feeding device of the present invention, a sewing machine frame having a mouth formed on one side wall and a tip end protruding out of the sewing machine frame through the mouth. A feeder provided in the sewing machine frame as described above, a motion conversion mechanism provided in the sewing machine frame and located near the feeder and converting unidirectional rotation of a main shaft into reciprocating motion, A feed mechanism provided in the sewing machine frame for reciprocating the feed base based on reciprocating motion of the motion conversion mechanism; and a cover for covering the motion conversion mechanism, supplying lubricating oil to the motion conversion mechanism. Wherein the plate portion facing the one side wall portion of the sewing machine frame and the plate portion facing the feed base are respectively suspended down to a lower end portion of the motion conversion mechanism portion. Characterized in was formed so that.

(Operation) According to the above means, the cover that covers the motion conversion mechanism is
In the sewing machine frame, the plate portion facing the one side wall portion where the mouth is located and the plate portion facing the feed stand are formed so as to respectively hang down to the lower end portion of the motion conversion mechanism portion. Lubricating oil can be prevented from scattering to the inside of the wall where the mouth is located.
Accordingly, it is possible to effectively prevent the lubricating oil from seeping out from the outlet for leading out the feed plate.

(Embodiment) An embodiment in which the present invention is applied to an overlock sewing machine will be described below with reference to the drawings.

The overall structure is as shown in FIG. 7. The open lower surface of the sewing machine frame 1 is closed by the oil receiver 2, the needle plate 3 and the cross plate 4 are arranged on the upper surface, and the needle bar is located above the needle plate 3. A mechanism 5 is provided. The needle plate 3 is provided with a feed dog groove, from which the main feed dog 6 and the differential feed dog 7 project upward. Each of the feed dogs 6 and 7 is driven by a feed mechanism 10 via a main feed stand 8 and a differential feed stand 9 described later.

As shown in FIG. 1, the main feeder 8 and the differential feeder 9
The front end of each of the sewing machine frames 1 passes through an opening 11 formed in the front side wall 1a.
It is arranged in the sewing machine frame 1 so as to protrude outside. The main feed dog 6 and the differential feed dog 7 are attached to the respective distal ends. Mouth 11
Is provided with a seal member 12 via a seal retainer 13. The seal member 12 has lip portions 12a and 12a at upper and lower portions, respectively, as shown in FIG.
2a is configured to be in sliding contact with the upper and lower surfaces of the main feed base 8 and the differential feed base 9.

The feed mechanism 10 is provided below the cross plate 4 in the interior of the sewing machine frame 1, and includes a motion conversion mechanism section 14, as shown in FIGS.
And a feed mechanism 15. Motion conversion mechanism 14
The two eccentric wheels 18, which form a double eccentric wheel 17 by being fitted and connected in a double ring shape to a main shaft 16 provided so as to pass below the main feed bar 8 and the differential feed bar 9. A feed rod 20 which reciprocates with this double eccentric wheel 17 while attaching 19
And a ratchet 21 for connecting / disconnecting the eccentric rings 18 and 19 to the eccentric ring 18 side.
And a ratchet stopper 22. The motion converter 14 converts the rotational motion of the main shaft 16 into a reciprocating motion of the feed rod 20 (indicated by an arrow A in FIG. 2), and moves the ratchet stopper 22 to engage with the ratchet 21. This is a known structure in which the combined eccentric amount of the double eccentric wheel 17 can be adjusted by removing it. The adjustment button 23 for moving the ratchet stopper 22 is provided in a penetrating state on the front wall 1a of the sewing machine frame 1 as shown in FIG.

The feed mechanism 15 is configured as follows. Feed shaft 24
The feed arm 25 is rotatably connected to the feed rod 20, whereby the reciprocating motion of the feed rod 20 is converted into the swing motion of the feed shaft 24 via the feed arm 25. A main feed arm 27 is mounted near the upper end of the feed shaft 24 in FIG. 2, and the tip of the main feed arm 27 is rotatably connected to the main feed base 8 via a main feed link 28. I have. Thus, the swinging motion of the feed shaft 24 can be transmitted as the horizontal reciprocating motion of the main feed base 8 via the main feed arm 27 and the main feed link 28. The amount of movement of the main feed bar 8 in the horizontal direction can be adjusted by pressing the adjustment button 23 to change the combined eccentricity of the double eccentric wheel 17.

On the other hand, near the base end of the feed shaft 24, an arc-shaped differential feed arm 29 is attached.
Among them, a differential feed link 30 is rotatably attached to a portion corresponding to the center of the circular arc of the differential feed arm 29, and the tip of the operation feed link 30 has a square piece 31 with respect to the differential feed arm 29. It is mounted so that the position can be changed via. With this, feed shaft 24
Can be transmitted as a horizontal reciprocating motion of the differential feed base 9 via the working feed arm 29 and the differential feed link 30. The horizontal movement amount of the differential feeder 9 can be changed not only by adjusting the combined eccentric amount in the motion conversion mechanism 14, but also by changing the position of the square piece 31 in the differential feed arm 29. It can be changed by adjusting. Thereby, it is possible to adjust only the moving amount of the differential feeder 9 while keeping the moving amount of the main feeder 8 constant. For such an adjustment, a differential adjustment knob (not shown) is provided on the outside of the sewing machine frame 1, and by operating the differential adjustment knob, a differential adjustment knob (not shown) is provided. The adjustment shaft 32 is rotated.
Further, a differential adjusting arm 33 is attached to the adjusting shaft 32, and an adjusting link 34 is provided between the tip of the differential adjusting arm 33 and the square piece 31, so that the operation of the differential adjusting knob is performed. It is transmitted to the square piece 31.

Next, L is provided on the lower surface of the main feed base 8 and the differential feed base 9.
A guide arm 35 having a character shape is provided integrally, and this guide arm 35 is provided.
A feed angle piece 36 is provided between the feed slides 8 and 9 so as to be relatively slidable with respect to the feed slides 8 and 9. The feed angle piece 36 is provided with an eccentric cam mechanism 37 fitted to the main shaft 16 so as to reciprocate both feed stands 8, 9 up and down as the main shaft 16 rotates. As a result, the feed tables 8, 9 and the feed teeth 6, 7 perform a so-called four-feed movement in which the horizontal movement by the feed mechanism 10 and the vertical movement by the eccentric cam mechanism 37 are combined. Although not shown, an oil supply path is formed in the main shaft 16 for lubrication of the feed mechanism 10, and the lubricating oil pumped from the oil tank by the pump passes through the oil supply path and the motion conversion mechanism. Department
14 is supplied.

Now, the motion conversion mechanism section 14 is provided with a cover 38 so as to cover it. As shown in FIG. 5, the cover 38 extends from the edge of the upper plate 39 having a size and shape capable of covering almost the entirety of the motion conversion mechanism 14 from above.
1, 42, 43, 44, and 45 are vertically suspended so as to be integrated with each other, and the right side surface of the cover 38 is almost open. An adjustment button that opens at the lower end of the plate 40
23 A recess 46 for escape is formed, a recessed portion 47 for escape of the main shaft 16 opened at the lower end of the plate portion 42 is formed, and
45 has a feed rod 20 opening at the lower end and a recess 48 for escape.
Are formed. Further, mounting portions 49 and 50 are formed on the upper plate portion 39 of the cover 38.

This cover 38 is, as shown in FIG.
It is arranged so as to cover from above and is fixed to the sewing machine frame 1 by screwing its mounting portions 49 and 50 to female screw portions (not shown) formed on the sewing machine frame 1. . In this case, FIG. 2 and FIG.
As shown in the drawing, plate portions 40 and 41, which are plate portions facing the front side wall portion 1a of the sewing machine frame 1, and plate portions 42, which are plate portions facing the main feed stand 8 and the differential feed stand 9, 43, 44 are the lower end of the motion conversion mechanism 14 in advance, that is, the lower end of the feed rod 20.
It is formed to hang down to 20a. The plate portion 45 facing the feed mechanism portion 15 is also formed to hang down to the lower end portion 20a (see FIG. 1) of the feed rod 20.

According to the above-described embodiment, when the main shaft 16 rotates, the feed mechanisms 8 and 9 are reciprocally driven in the horizontal direction (the direction in and out of the opening 11) by the feed mechanism 10, and at the same time, by the eccentric cam mechanism 37. Reciprocated up and down. At this time, since the lubricating oil is supplied to the motion converting mechanism 14, excess lubricating oil is released from the motion converting mechanism 14.

In this case, if the lubricating oil sometimes adheres to the side surface of the feed base 9 or the inner surface of the front wall portion 1a where the mouth portion 11 exists,
Lubricating oil easily reaches the sealing portion of the mouth portion 11. However, according to the present embodiment, the cover that covers the motion conversion mechanism 14 is attached to the front wall of the sewing machine frame 1 where the mouth 11 is located.
Plate portions 40 and 41 facing 1a and plate portions 42 and 41 facing feed bar 9
43, 44 are respectively formed so as to hang down to the lower end of the motion converting mechanism 14 (the lower end 20a of the feed rod 20), so that the lubricating oil scatters from the motion converting mechanism 14 particularly to the feed table 9 side. It is possible to prevent the lubricating oil from being scattered toward the inner side of the front side wall 1a where the mouth 11 is present, thereby effectively preventing the lubricating oil from seeping out from the mouth 11 for leading out the feed plate 9.

Note that, in the above embodiment, the feed mechanism
Since the plate 45 facing the bottom 15 also has a structure that hangs down to the lower end of the motion conversion mechanism 14, the lubricating oil can be effectively prevented from scattering to the feed mechanism 15 side. There may be a configuration without any.

[Effect of the Invention] As is clear from the above description, the present invention covers the cover,
In the sewing machine frame, the plate facing the side wall where the mouth is located and the plate facing the feed stand are respectively formed so as to hang down to the lower end of the motion conversion mechanism. It is possible to prevent the lubricating oil from scattering to the table side and to the inner wall of the sewing machine frame where the mouth is located. It has an excellent effect of preventing oozing.

[Brief description of the drawings]

1 is a longitudinal sectional view of a feed mechanism, FIG. 2 is a plan view of the same, FIG. 3 is a longitudinal sectional view taken along line III-III of FIG. 4 is a longitudinal sectional view taken along the line IV-IV of FIG. 2, FIG. 5 is a perspective view of a cover, FIG. 6 is a perspective view showing a seal structure, and FIG. 7 is a perspective view of the entire overlock sewing machine. It is. In the drawing, 1 is a sewing machine frame, 1a is a front side wall (one side wall), 5 is a needle bar mechanism, 6 is a main feed dog (feed dog), 7 is a differential feed dog (feed dog), and 8 is a main feed dog. Stand (feed stand), 9 is a differential feed stand (feed stand), 10 is a feed mechanism, 11 is a mouth, 12 is a seal member, 13 is a seal holder, 14 is a motion conversion mechanism,
15 is a feed mechanism, 16 is a spindle, 20 is a feed rod, 20a is a lower end, 38 is a cover, 40 and 41 are plates (plates facing one side wall), and plates 42, 43 and 44 are plates Part (plate part facing the feed base).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kazutoshi Umeda 9-35, Horitadori, Mizuho-ku, Nagoya City, Aichi Prefecture Inside Brother Industries, Ltd. (72) Masahiro Fukushima 9-chome, Horitadori, Mizuho-ku, Nagoya-shi, Aichi Prefecture No. 35 Inside Brother Industries, Ltd. (72) Inventor Takashi Oguri 1040, Terakawato-cho, Mizunami-shi, Gifu Inside Mizunami Seiki Co., Ltd. (56) References JP-B-59-22558 (JP, B2)

Claims (1)

(57) [Scope of request for utility model registration] 1. A sewing machine frame having a mouth formed on one side wall, a feed base provided in the sewing machine frame such that a tip end protrudes out of the sewing machine frame through the mouth, and the sewing machine frame. A motion conversion mechanism provided in the vicinity of the feed table and configured to convert one-way rotation of the main shaft into reciprocating motion; and the feed table provided in the sewing machine frame based on reciprocating motion by the motion conversion mechanism. And a cover for covering the motion conversion mechanism, and supplying lubricating oil to the motion conversion mechanism, wherein the cover includes the one side wall portion of the sewing machine frame. And a plate portion facing the feed table is formed so as to hang down to a lower end portion of the motion conversion mechanism.