JPH0535077U - Horizontal hook of sewing machine - Google Patents

Abstract

(57) [Summary] [Purpose] Foreign matter that has entered the horizontal hook of the sewing machine flows out of the horizontal hook to ensure a stable drive of the horizontal hook. [Composition] With respect to the horizontal hook of the sewing machine, in the same direction as the outer hook rotating direction from an oil supply hole 6 formed in the sliding contact surface of the outer hook so as to supply oil to the sliding contact surface between the inner hook 2 and the outer hook 3. A foreign matter reservoir groove 7 extending toward the outside of the shuttle is formed, and a foreign matter outflow path 9 extending from the reservoir groove 7 to the outside of the outer shuttle is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a horizontal hook of a sewing machine, and more particularly, to a horizontal hook of a sewing machine configured so that foreign matter that has entered between an inner hook and an outer hook is discharged to the outside of the hook.

[0002]

[Prior Art]

 A shown in FIG. 3 is a horizontal shuttle of the sewing machine, and this horizontal shuttle A is provided below the sewing needle N of the sewing machine via the cloth W and the needle plate 1.

The horizontal shuttle A includes an inner shuttle 2 for storing a lower thread (not shown), and a sword tip K for catching an upper thread (not shown) supplied below the cloth W by driving the sewing needle N up and down. , The outer hook 3 that rotates so as to pass the captured upper thread through the inner hook 2.

Since the outer hook 3 of the horizontal hook A rotates at a high speed of 8000 rpm during sewing, the sliding contact surface between the inner hook 2 that does not rotate and the outer hook 3 is always lubricated. Need to continue.

FIG. 4 is an explanatory view showing the oil supply path of the horizontal shuttle A. In the figure, reference numeral 4 is a rotary shaft for rotating the outer shuttle 3 of the horizontal shuttle A. Inside the rotary shaft 4, there is a vertical path 5 whose inner diameter increases as it goes upward as shown in the figure. The lower end of the vertical path 5 reaches the oil tank.

[The upper end of the vertical path 5 is bifurcated as shown in the figure, and the ends thereof reach the sliding contact surface S between the inner hook 2 and the outer hook 3, respectively.

In the horizontal shuttle A formed as described above, the outer shuttle 3 (rotary shaft 4) is rotated so that the centrifugal oil is used to raise the lubricating oil in the vertical path 5 and Lubricating oil can be supplied to the outer pot 3.

On the other hand, FIG. 5 is a front view showing the outer pot 3. (The inner hook 2 is omitted.) In the figure, 6 and 6 are end holes of the oil feed passage formed in the outer hook 3, that is, the oil feed holes. The oil feed holes 6 and 6 are the inner hook 2 and the outer hook 3. It is formed on the sliding contact surface S portion of the above, so that the lubricating oil passing through the oil supply path can be properly supplied between the two pots.

By the way, in the horizontal hook A which is divided into the inner hook 2 and the outer hook 3, unnecessary foreign matter (particularly cloth dust) is apt to enter between the two hooks, and the foreign matter is sewn during sewing (rotation). At the time), there is a disadvantage that the oil fill hole 6 formed on the sliding contact surface enters and closes the oil fill hole 6.

When such inconvenience occurs and the lubricating oil is no longer supplied to the horizontal hook A, the horizontal hook A rotating at a high speed easily causes seizure, forcing replacement of the horizontal hook A and reducing the sewing cost. High efficiency and low sewing work efficiency.

For this reason, a storage groove is nowadays proposed to collect the foreign matter at a predetermined position at the time of sewing (when rotating) so as to prevent the foreign matter from entering the supply hole 6.

In FIG. 5, reference numerals 7 and 7 denote reservoir grooves provided in the vicinity of the supply holes 6 and 6. The reservoir groove 7 extends from the oil supply hole 6 in the rotating direction of the outer pot (indicated by an arrow), Since the foreign matter 8 is formed toward the outside, the foreign matter 8 is collected in the groove so that the foreign matter 8 does not enter the oil supply hole 6, and the oil supply hole 6 can be prevented from being blocked.

[0013]

[Problems to be solved by the device]

 However, the above conventional technique has the following problems. In the storage groove 8 shown in FIG. 5, it is possible to temporarily trap foreign matter that has entered the horizontal hook A and prevent the supply hole 6 from being blocked, but it is possible to use the sewing machine for a long period of time. In the above, there is a limit to the accumulation of the foreign matter 8 and eventually the foreign matter 8 is allowed to enter the oil supply hole 6.

In order to prevent the above-mentioned inconvenience, a method of periodically checking the amount of foreign matter accumulated in the collecting groove 7 can be considered, but such detailed inspection of the horizontal hook A is left to the sewing manufacturer. Could not be carried out as it would hinder the sewing work.

[0015]

[Means for Solving the Problems]

 The horizontal hook of the sewing machine according to the present invention has been made in order to solve the above-mentioned conventional problems. Therefore, a lubricating hole formed in the sliding contact surface of the outer hook so as to lubricate the sliding contact surface between the inner hook and the outer hook. Therefore, by forming a foreign material reservoir groove that extends in the same direction as the outer hook rotating direction toward the outside of the hook, and by forming a foreign material outflow path from this reservoir groove to the outside of the outer hook, It is an attempt to solve a problem.

[0016]

[Action]

 The horizontal hook of the sewing machine according to the present invention is inserted between the inner hook and the outer hook in the foreign material storage groove extending toward the outside of the hook in the same direction as the outer hook rotation direction from the oil feed hole of the outer hook. Guide the foreign matter and let this foreign substance flow out of the horizontal hook from the foreign substance outflow route by centrifugal force together with the lubricating oil fed from the oil filling hole.

[0017]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. The same parts as those in the conventional example are designated by the same reference numerals, and duplicate description will be omitted.

1 and 2 are views showing an embodiment of a horizontal hook of a sewing machine according to the present invention. In FIG. 1, 6 and 6 are refueling holes opened on the circumferential contact surface S of the outer hook 3, and 7 and 7 are in the same direction as the rotation direction of the outer hook 3 (shown by an arrow) from the refueling holes 6 and 6. , It is a reservoir groove that extends toward the outside of the hook.

Denoted at 9 and 9 are foreign matter outflow paths formed in the storage grooves 7 and 7, respectively, and their tips extend to the outside of the outer pot 3, as shown in the figure.

The operation of the horizontal hook of the sewing machine having the above-described reservoir groove 7 and foreign matter outflow path 9 will be described with reference to FIG.

The outer pot 3 of the horizontal pot is rotationally driven as described above, and this rotational drive feeds lubricating oil from the supply hole 6 which is the tip of the feed path onto the circumferential contact surface S in the horizontal pot.

Then, the supplied lubricating oil flows out in a direction opposite to the rotation direction of the outer pot 3 as indicated by the arrow in the figure by the rotation of the outer pot 3.

The oil directed toward the supply hole 6 is discharged to the outside of the horizontal kettle through the foreign matter flow passage 9 by the centrifugal force caused by the rotation of the outer kettle 3.

Here, the foreign matter 8 that has entered the horizontal kettle flows out of the horizontal kettle through the foreign matter outflow path 9 together with the lubricating oil that flows due to the rotation of the outer kettle 3.

Further, since the lubricating oil supplied to the horizontal kettle increases its supply amount according to the lubricating oil that has flown out, there is no problem in driving the horizontal cauldron, and the lubricating oil that has flown out is well known. It reaches the oil pan, is filtered by the filter, and then is supplied again to the circulation device, so it is not eliminated.

[0026]

[Effect of the device]

 As described above, the horizontal hook of the sewing machine according to the present invention forms the foreign matter storage groove extending outward from the hook in the same direction as the outer hook rotation direction from the oil supply hole formed in the outer hook. At the same time, since a foreign matter outflow path from this reservoir groove to the outside of the outer hook is formed, foreign matter that enters the horizontal hook can flow out of the horizontal hook with the lubricating oil by the centrifugal force of the outer hook. As a result, stable driving of the horizontal hook can be secured, and sewing costs and work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a horizontal hook of a sewing machine according to the present invention.

FIG. 2 is an explanatory diagram showing movement states of lubricating oil and foreign matter by a reservoir groove and a foreign matter outflow path formed in an outer hook of the horizontal hook of the sewing machine shown in FIG.

FIG. 3 is a side view showing an installation state of a conventional horizontal hook in a sewing machine.

4 is an explanatory view showing a supply path formed in a horizontal hook of the sewing machine shown in FIG.

FIG. 5 is an explanatory view showing a reservoir groove formed in an outer pot of the horizontal hook of the sewing machine shown in FIG. 3 and foreign substances collected in the reservoir groove.

[Explanation of symbols]

 2 Inner hook 3 Outer hook 6 Oil supply hole 9 Foreign matter outflow route

Claims (1)

[Scope of utility model registration request] 1. A bobbin for storing a bobbin thread, and a rotatably arranged so that the bobbin thread is placed on the bobbin and catches the bobbin thread supplied from a sewing needle of a sewing machine to cross the bobbin thread and the bobbin thread. In the horizontal hook of the sewing machine consisting of the outer hook and the outer hook, the oil feeding hole formed in the sliding contact surface of the outer hook in the same direction as the outer hook rotating direction supplies oil to the sliding contact surface between the inner hook and the outer hook. A horizontal hook for a sewing machine, wherein a foreign material reservoir groove extending toward the outside of the hook is formed, and a foreign material outflow path extending from the reservoir groove to the outside of the outer hook is formed.