JPH0631679U - Vertical full rotary hook device of sewing machine - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Fine sewing debris generated from cloth and sewing threads, a small amount of lubricating oil, or a mixture of both, is scattered by the rotation of the lower hook of the feed dog, and becomes the above-mentioned component parts. Avoiding problems with sewing work due to adhesion or intrusion of sliding parts. A tongue 30 made of a flexible and wear-resistant material is provided, and the periphery of the hook is cleaned by the rotation of the outer hook by the tongue. That is, as shown in FIG. 1, the circumferential position is a boundary point 32 between the straight line 13 parallel to the base 14 of the thread dividing spring 8 provided on the outer circumference of the outer hook 2 and the rising curve 31, and the highest point 33 of the rising curve 31. The axial position is the radial dimension or dimension C in the range between the straight line 13 of the thread splitting spring 8 and the thread splitting spring bottom 14, that is, in the rectangular area surrounded by the two-dot chain lines A and B in FIG. Leather that is dimensioned to make light contact with the components around the hook device when the sewing machine is operating,
The tongue piece 30 made of a material having flexibility and abrasion resistance such as artificial leather or synthetic resin was provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a full rotary hook of a sewing machine, mainly a vertical full rotary hook.

[0002]

[Prior art]

 Conventionally, in a sewing machine, as shown in FIG. 6, a bobbin (not shown) in which a lower thread is wound, a bobbin case 1, an outer hook 2, and an inner hook 3 are provided inside a lower portion of an actual sewing position. , Feed dog 4, feed dog base 5, feed up / down device 6, feed front / rear device (not shown) and the like are densely arranged in a narrow space. Further, in recent years, the opener device 7 for improving the sewing and the automatic thread trimming device (not shown) for improving the efficiency of the sewing work have become increasingly crowded, and the surroundings of the hook device Is 90 degrees to the left and right along the outer circumference of the hook device with respect to the lowered position of the needle, and there is only a gap of about 1 mm to 2 mm from the outer circumference of the hook device.

[0003]

[Problems to be solved by the device]

 As mentioned above, in addition to overcrowded arrangement, sewing materials have been diversified. Fine sewing debris generated from these cloths and sewing threads, a small amount of lubricating oil, or a mixture of both, is scattered by the rotation of the hook on the lower surface of the tooth and the lower part of the needle hole. A cloth and thread coated with a coating agent that is used for sewing such as air bags that requires a needle is developed, and when these are used, the coating agent melts due to the high heat generated by the needle or the hook device and is a paste with adhesiveness. It often happens that the particles adhere to the above-mentioned components and hinder smooth operation. In particular, there are many intrusions around the needle hole, the lower part of the feed dog, the sliding part between the outer hook 2 and the inner hook 3 of the hook device, and the inside of the bobbin case 1, and it is demanded in the sewing industry to solve this drawback. However, there is no fundamental solution. The present invention solves this problem without changing the structure of the conventional sewing machine.

[0004]

Means for Solving the Problems A tongue piece 30 made of a flexible and wear-resistant material such as leather, artificial leather, or synthetic resin is provided on the outer peripheral portion of the outer pot where it does not interfere with the flow of yarn, and Rotate the hook to clean around the hook with this tongue. That is, as shown in FIG. 1, the circumferential position is the boundary point 32 between the straight line 13 parallel to the base 14 of the thread dividing spring 8 provided on the outer circumference of the outer hook 2 and the rising curve 31, and the highest point 33 of the rising curve 31. The axial position is the radial dimension or dimension C in the range between the straight line 13 of the thread split spring 8 and the thread split spring bottom 14, that is, the rectangular area surrounded by the two-dot chain lines A and B in FIG. Was provided with a tongue piece 30 made of a soft and wear-resistant material such as leather, artificial leather or synthetic resin, which is so dimensioned as to lightly contact the components around the hook device during the operation of the sewing machine.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a development view of a thread splitting spring according to the present invention, in which the shape and thickness of the outer circumference, the size and position of the screw holes 15, 16, 17, 18 for the four machine screws 9 to 12 are conventional. It is the same as the type of thread split spring.

In order to attach the tongue piece member 19 according to the present invention to this thread splitting spring, a tongue piece window 20 is provided in the area between the screw holes 17 and 18 by pressing or the like. The size and position are inside the rectangle surrounded by the sides A and B, and the width is D and the length is F. The dimension H in FIG. 2 is set to 1 mm to 2 mm so that the bottom side 21 of the thread split spring is not divided in order to maintain the shape of the thread split spring. In the embodiment, the F dimension is 6 mm and the D dimension is 1 mm, and the position of this window in the longitudinal direction of the thread splitting spring is approximately the center position of the screw holes 17 and 18.

FIG. 5 is a perspective view of the tongue piece member 19 used in the present invention. The material used is a flexible and wear-resistant material such as natural leather, artificial leather, or synthetic resin, and is composed of a mounting flat portion 29 and a tongue piece 30. The dimension G has a tongue piece window 20 provided on the thread split spring 8. The thickness E is the same as the width D of the tongue window 20. The angle J was set to an obtuse angle of 100 to 120 degrees so that the tongue piece could smoothly contact the peripheral portion of the hook device. Further, the width K is set to be 2 mm to 3 mm larger than the width G to expand the cleaning range. The dimension C in FIG. 1 (B) is set to 2 mm, but depending on the arrangement of the components of the sewing machine used, the effect may be exerted by extending it further, and it is effective to extend the width K as well. In some cases

FIG. 3 is a development view of the vicinity of the position where the thread split spring of the outer hook 2 is attached, 22 is a sword tip for capturing a loop (not shown) of the upper thread, and 23 is a thread split spring 8. This is the mounting surface, and in the conventional type outer pot, it forms a flat cylindrical surface. The tapped holes 24, 25, 26, 27 in which female screws are cut are provided at positions corresponding to the thread split spring mounting small screws 9, 10, 11, 12, respectively.

In the present invention, a tongue mounting seat 28 is provided between the tap holes 26 and 27 of the thread split spring mounting surface 23 as shown in FIGS. 3 and 4. That is, the depth L is slightly shallower than the thickness E of the tongue member, that is, the flat portion 29 of the tongue member is inserted into the tongue mounting seat 28, and the tongue 30 is attached to the tongue of the thread split spring. When the thread split spring is attached to the thread split spring mounting surface 8 of the outer hook through the window 20 with the machine screws 9, 10, 11 and 12, the tongue piece is securely fixed by tightening the machine screws 11 and 12. The depth should be such that there is no gap between the thread split spring and the outer hook. Further, it goes without saying that the dimensions M and N are dimensions into which the attachment flat portion 29 of the tongue piece can be inserted.

In the present embodiment, the dimensions are as described above, but since various types of sewing machines are currently provided in the sewing industry, the dimensions and shape can be changed according to each type. Should.

[0011]

[Effect of device]

 The effect of the present invention is that the development of the sewing machine mechanism makes the arrangement of the components near the hook device more densely arranged. In addition, the diversification of the sewing materials makes it possible to obtain minute sewing scraps and traces of fine sewing scraps generated from these cloths and sewing threads. Lubricating oil, or mixture of both, melted and pasty coating agent, etc. is scattered around the needle hole, under the feed dog, etc. by rotation of the hook and adheres to the above-mentioned components or To the sliding part of the hook device to prevent smooth operation, or to stop the sewing machine due to baking of the hook due to entering the sliding part between the outer hook and the inner hook of the hook device, or to enter the inside of the bobbin case. Defects such as dirt on the bobbin thread are resolved, and troubles such as the stop of the sewing machine due to these causes can be eliminated. Further, the hook device according to the present invention has basically the same shape as the conventional one, and the sewing machine can be used without any design change. Further, the tongue piece can be formed into an effective shape for each user according to the model used. You can change it freely.

[Brief description of drawings]

FIG. 1A is a front view of a hook device according to the present invention. (B) Rear view of the hook device according to the present invention.

FIG. 2 is an exploded view of a thread split spring according to the present invention.

FIG. 3 is an exploded view of a thread split spring mounting portion of an outer hook according to the present invention.

FIG. 4 is a partial cross-sectional view of FIG.

FIG. 5 is a perspective view of a tongue member used in an embodiment of the present invention.

FIG. 6 is a layout view of components around the shuttle device.

FIG. 7 is a front view of a conventional hook device.

[Explanation of symbols]

 1 bobbin case 2 outer hook 3 inner hook 4 feed dog 8 thread split spring 9 thread split spring mounting small screw 10 thread split spring mounting small screw 11 thread split spring mounting small screw 12 thread split spring mounting small screw 13 thread split spring straight line Part 19 Tongue member 20 Tongue window 22 Sword tip 23 Thread split spring mounting surface 29 Tongue mounting flat part 30 Tongue piece 31 Rising curve part of thread split spring 33 Highest point of rising curve part of thread split spring

Claims (1)

[Scope of utility model registration request] 1. In a full-rotary hook having a thread splitting spring on the outer circumference of the outer hook, the outer peripheral position of the outer hook that does not interfere with the vertical movement of the needle and the path of the thread forming the stitch, that is, FIG. As shown in, the circumferential position is a straight line (13) parallel to the bottom side (14) of the thread split spring (8) provided on the outer circumference of the outer hook (2).
Boundary point (32) between the rising curve (31) and the rising curve (31)
The range between the highest point (33) of 1) and the axial position is the range between the straight line (13) of the thread splitting spring and the bottom side (14) of the thread splitting spring, that is, the side indicated by the two-dot chain line in FIG. In the range of the rectangle surrounded by (A) and the side (B), the thickness 0.
A tongue piece made of a soft and wear-resistant material such as leather, artificial leather or synthetic resin having a size of 1 mm to 2 mm in the radial direction, that is, the dimension (C) is such that it lightly contacts the components around the hook device ( 30) A vertical full rotary hook device for a sewing machine characterized by being provided with