JPH0595487U - Post type sewing machine rotary hook cover - Google Patents

Abstract

(57) [Abstract] [Purpose] In a post-type sewing machine, the rotary hook cover is properly closed even when the rotary hook base equipped with the rotary hook is moved. [Constitution] The rotary hook cover is provided with a position adjusting device capable of adjusting the position with respect to the needle plate direction. The position adjusting device is provided with a plurality of screw holes formed in the hook base in the needle plate direction A plurality of adjusting screw bodies screwed together, a contact plate for contacting the protruding tip of the adjusting screw body and holding the installation portion of the rotary hook cover, and a fixing means for fixing the contact plate to the hook base. Configure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary hook cover for a post-type sewing machine, and more particularly to a rotary hook cover for a post-type sewing machine that is properly closed even when the rotary hook is moved in position.

[0002]

[Prior Art]

 FIG. 2 is a view showing a post-type sewing machine. In this post-type sewing machine, a lower side sewing mechanism portion including a rotary hook for holding a lower thread is formed in an upright type (post type) as shown in the figure. ing.

FIG. 3 is a perspective view showing this lower side sewing mechanism portion. In the figure, K is a rotary hook provided on the left and right, and this rotary hook K is equipped with a sword tip Ka as is well known. A loop of the needle thread formed by the up-and-down drive of the sewing needle of the sewing machine is caught by the sword tip Ka, and the needle thread is passed through the hook to cross the held lower thread and the needle thread to form a stitch. You can do it.

Reference numeral 1 is a needle plate having a needle drop hole 1a for a sewing needle, and 2 is a rotary hook cover provided on a hook base 3 by a hinge 4 so as to be opened and closed in the arrow direction.

The rotary hook cover 2 has an upper surface that is horizontal along the needle plate 1, functions as a placing table for the workpiece, and serves as a protective cover for the rotary hook K. There is.

[0006]

[Problems to be solved by the device]

 However, the rotary hook cover of the conventional post-type sewing machine has the following problems.

The tip of the rotary hook may be damaged due to an accident at the time of sewing or the like. If such a tip is not seriously damaged so that the tip of the blade must be replaced, a sharpening tool such as a grindstone is used to correct it. To do.

When the sword tip of the rotary hook is polished and corrected as described above, the radius of gyration of the sword tip is naturally small, that is, it is separated from the needle thread loop, and the needle thread may not be properly captured. ..

In order to prevent such an inconvenience, a method of moving a shuttle base (3 shown in FIG. 3) in which the rotary shuttle is installed toward the needle plate is adopted.

However, when the shuttle base is moved in the direction of the needle plate, the rotary hook cover 2 (right side in the figure) is not completely closed as shown in FIG. There is a possibility that a gap will be created and the top surface will tilt, making the placement of the sewing object unstable, or the rotary hook cover 2 will open during sewing work, which may cause injury to the operator. ..

[0011]

[Means for Solving the Problems]

 The rotary hook cover of the post-type sewing machine according to the present invention is made in order to solve the above-mentioned conventional problems, and a position adjusting device capable of adjusting the position of the installation part of the rotary hook cover with respect to the needle plate direction. This position adjusting device is attached to the hook base with a plurality of screw holes formed in the direction of the needle plate, a plurality of adjusting screw bodies screwed into the screw holes, and the protruding tip of the adjusting screw body. An object of the present invention is to solve the above-mentioned conventional problems by providing a contact plate that is in contact with the rotary hook cover and holds the installation part of the rotary hook cover, and a fixing means that fixes the contact plate to the hook base.

[0012]

[Action]

 The rotary hook cover of the post-type sewing machine according to the present invention changes the position of the abutment plate by adjusting the protrusion amount of the adjusting screw that is screwed into the screw hole provided in the hook base, and the rotating portion with the installation portion held by the contact plate is changed. Change the position of the hook cover so that the rotary hook cover is completely closed.

[0013]

[Example of device]

 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. FIG. 1 is a view showing an embodiment of a cover of a post type sewing machine according to the present invention.

FIG. 1 is an exploded perspective view showing a configuration state of the position adjusting means. In the figure, 3a is a screw hole formed in the shuttle base 3 toward the needle plate 1, and in this embodiment, three screw holes are provided. Has been formed. Reference numeral 6 is an adjusting screw body into which the screw holes 3a are respectively screwed.

Reference numeral 7 is a contact plate whose one surface (the left surface in the drawing) abuts on the projecting tip of the adjusting screw pair 6 and the other surface (the right side in the drawing) abuts on the hinge 4, which serves as a fixing means. By means of 8, the rotary cover 2 and the installation portion (hinge 4) are fixed to the hook base 3.

The rotary hook cover of the post-type sewing machine configured as described above adjusts the protrusion amount of the adjusting screw body 6 protruding from the screw hole 3a, so that the contact plate 7, the hinge 4, that is, the rotary hook cover. 2 and the needle plate 1 can be adjusted, and the rotary hook cover 2 can be properly closed by moving the rotary hook cover 2 in a direction opposite to the moving direction of the shuttle base 3. ..

In FIG. 1, if the hinge 4 has good strength, the hinge 4 may be used in place of the contact plate 7, and the contact plate 7 may be omitted.

[0018]

[Effect of the device]

 Since the rotary hook cover of the post-type sewing machine according to the present invention is configured by providing the position adjusting device capable of moving the position with respect to the needle plate direction in the installation portion of the rotary hook cover as described above, it is possible to move the hook base. In this case, the rotary hook cover can be properly closed by adjusting the rotary hook cover position in the direction opposite to the moving direction of the hook base, and the workpiece can be properly placed on the horizontal upper surface of the rotary hook cover. It is possible to place it on the machine and prevent the unnecessary opening of the rotary hook cover during sewing, thus ensuring safety.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration state of a rotary hook cover of a post-type sewing machine according to the present invention.

FIG. 2 is a side view showing a post-type sewing machine.

FIG. 3 is an external perspective view showing a lower side sewing mechanism portion of a conventional post-type sewing machine.

FIG. 4 is an external perspective view showing an improperly closed state of the rotary hook cover that occurs when the hook base is moved in the needle plate direction in the post-type sewing machine of FIG. 3.

[Explanation of symbols]

 1 Needle plate 3 Hook base 3a Screw hole 4 Installation part (hinge) 6 Adjustment screw body 7 Contact plate

Claims (1)

[Scope of utility model registration request] 1. A rotary hook cover of a post-type sewing machine, which has an upper surface that is horizontal along a needle plate surface, acts as a placement table for a workpiece, and is openably and closably mounted on a hook base. A position adjusting device is provided to adjust the position of the cover installation part with respect to the needle plate direction, and this position adjusting device is screwed into the screw holes formed in the shuttle base toward the needle plate direction. A plurality of adjusting screw bodies, a contact plate that contacts the protruding tip of the adjusting screw body and holds the installation portion of the rotary hook cover, and a fixing means that fixes the contact plate to the hook base. A rotary hook cover of a post-type sewing machine characterized by the above.