JPS5811349Y2 - Inner pot attachment/detachment structure of horizontal pot - Google Patents

Description

[Detailed description of the invention] The present invention relates to a horizontal hook for a sewing machine equipped with a movable rotation stopper, and its purpose is to prevent the movable rotation stopper from attaching or detaching the inner hook from the outer hook and to remove the hook from the outer hook. It is an object of the present invention to provide a structure for attaching and detaching an inner hook of a horizontal hook, which allows the inner hook to be moved to a position where the horizontal hook is not rotated, and which is configured so that the inner hook does not interfere with the movable rotation stopper.

In other words, with a horizontal hook of a sewing machine, it is necessary to remove the inner hook from the outer hook and reinstall it when loading the hook or cleaning lint accumulated between the outer hook and the inner hook. In the conventional example of a horizontal hook equipped with a sewing machine, when attaching and detaching the inner hook, it takes time and effort to manually turn the flywheel of the sewing machine in order to move the movable rotation stopper to a position where the inner hook can be easily attached and detached.
Furthermore, if the flywheel is not turned by hand or if the hand is turned in an inappropriate position, there is a problem in that when the inner pot is attached or removed, the inner pot and the related machinery of the horizontal hook interfere with each other, resulting in deformation or damage to both.

The present invention is intended to solve the above-mentioned problems of the conventional example.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In this embodiment, the thrust direction position of the so-called cover-type horizontal hook, that is, the inner hook, is regulated by the outer hook in the downward direction of the thrust, and in the upward direction of the thrust by a cover member that provides a gap through which the sewing thread can pass. A case will be described in which the present invention is applied to a cover-type horizontal hook, but the present invention is not limited to this cover-type horizontal hook.

In FIG. 1, reference numeral 1 denotes an inner hook, and in the downward thrust direction, the lower surface 3 of the race surface 2 of the inner hook 1 is regulated by the upper surface 6 of the race surface 5 of the outer hook 4, and in the upward thrust direction, the inner hook 1 The upper surface 7 of is regulated by the back surface 9 of the throat plate 8 and the back surface 11 of the square plate 10 with a gap through which the sewing thread can pass.

The side surface of the race surface 2 of the inner hook 1 engages with the race side wall 12 of the outer hook 4 to restrict its planar position, and the forward direction B of rotation of the outer hook 4 is movable as will be described later. The rotation is regulated by a rotation stopper 13, and the reverse direction C of rotation is regulated by a reverse rotation stopper 16, which has a front side wall 14 of the inner hook 1 screwed to the throat plate 8 by screws 15.

A bobbin storage chamber 17 is formed approximately in the center of the inner hook 1, and a bobbin thread tension device 18 is attached to the side thereof, and the bobbin thread 19 passes through a hole 20 of the bobbin thread tension device to an outlet 21.
The lower thread tension is applied by the lower thread tension spring 22.

Reference numeral 23 denotes a relief portion formed in the inner pot 1 to prevent interference between the inner pot and a movable rotation stopper 13, which will be described later, when the inner pot is attached or removed.

A screw gear 24 is integrally attached to the outer hook 4 by brazing or the like, and the screw gear is pivotally connected to a shaft 27 that is fixed 26 to the bed 25.

The square plate 10 is engaged with a dovetail groove 37 formed in the bed 25 as shown in FIG.
can be moved along.

The movable rotation stopper 13 is pressed against a cam 28 formed below the outer hook 4 by a spring 29, with the pin 38 as the center of rotation, and is caused to swing in synchronization with the rotation of the outer hook 4, thereby locking the movable rotation stopper 13. Pieces 30 and 31 alternately cut out 3 of the inner pot.
The inner hook 1 comes into contact with the side walls 34 and 35 of 2 and 33 to restrict the rotational position of the inner hook 1 in the forward direction B, and together with the reversal stopper 16, restricts the rotational direction position of the inner hook.

An actuating plate 36 is fixed to the locking piece 31 and indicates the direction in which the movable rotation stopper 13 is released.

That is, when the movable rotation stopper 13 is in the state shown in FIG. 1, the actuating plate 36 engages the locking piece 31 and the side wall 35 to prevent the inner pot 1 from being removed from the outer hook 4. , D to release the engagement by turning it in the upward direction.

In the horizontal hook having the above configuration, to remove the inner hook 1 from the outer hook 4, first pull the square plate 10 to the right in FIG. After completely exposing the needle plate 8 (FIG. 3) and removing the throat plate 8, press the operating plate 36 in the D top direction with your fingers or the like to release the engagement between the locking piece 31 and the side wall 35. This can be done by pulling out the inner pot 1 diagonally upward to the right in FIG.

In this case, since the inner pot 1 is formed with a relief part 23, the tip of the other locking piece 30 that has entered deeply into the notch 32 of the inner pot 1 is located diagonally above the right side. The inner pot 1 will not be damaged during the process of pulling it out.

The attachment of the inner pot 1 to the outer hook 4 can be carried out by the reverse operation of the removal described above.

As described above, the present invention provides an inner pot for attaching and detaching a horizontal hook, which is configured so that the movable rotation stopper can be moved to a position where attachment and detachment is least hindered when the inner pot is attached and detached, and the inner pot is configured so that the inner pot does not interfere with the movable rotation stop. This provides a structure that is easier and more reliable to operate than the conventional example in which the movable rotation stopper was manually rotated by turning the flywheel of the sewing machine when attaching and detaching the inner hook. The problem of interference between the horizontal hook and the related machines of the horizontal hook causing deformation or damage to both is also solved, and its practical effects are therefore significant.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention, and FIG. 1 is an exploded perspective view of a horizontal pot, FIG. 2 is a sectional view showing the sliding part between the square plate and the bed, and FIGS. 3 and 4 are views of the inner pot. It is a sectional view showing a removal process. 1 is an inner hook, 4 is an outer hook, 13 is a movable rotation stopper, 23 is a relief part, 28 is a cam, 29 is a spring, 30.31 is a locking piece, 3
6 is the actuation plate, 38 is the pin.

Claims (1)

[Scope of utility model registration request] In a horizontal hook of a sewing machine, a pair of locking pieces of a movable rotation stopper are pivotally supported by a pin on the outside of the outer hook, are biased by a spring about the pin, and are pressed against a cam formed below the outer hook. An actuating plate is attached to one side, and the movable rotation stopper is rotated by operating the actuating plate, so that the vicinity of the tip of the other locking piece is moved above the relief part formed in the inner hook, regardless of the rotational phase of the outer hook. A removable structure for an inner pot of a horizontal pot, characterized in that it is configured so that it can be placed in the same position.