JPS5899988A - Attachment of sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an attachment suitable for use in a sewing machine, particularly a free arm type sewing machine, which is removably connected to a throat plate so as to be substantially flush with the throat plate. .

When sewing buttonholes or embroidery using a buttonhole sewing device or embroidery device, conventionally the square plate that is attached to the throat plate is generally removed, and instead a pinion for driving the device is placed on the upper side. Either a square plate with an intermittent feed mechanism that engages with the operating mechanism of the sewing machine and rotates the pinion intermittently is attached to the side, or the needle is connected to and disconnected from a spring that normally biases the square plate in the closing direction. It is relatively troublesome to attach and detach the copper plate to and from the plate, and the movement of the operating mechanism lifts up the copper plate together with the intermittent feed mechanism to open and close the plate, so
The stitching performed by the machine that is attached to it will be unstable.

In order to prevent opening and closing due to the throat plate sticking up, increasing the force of the spring impedes the smooth movement of the device and causes problems such as increased wear on parts.

When connecting a square plate like the one described above to the throat plate of a free arm type sewing machine so as to protrude from the bed, it is necessary to take further care to ensure that the square plate is horizontal. Is it possible to connect the square plate to the throat plate by inserting it? If it is simply inserted, there is a risk of it falling off due to carelessness, and since the square plate is held in a cantilevered manner, do not place your hand on the corner plate. During operation, the presser foot tilts depending on how well the presser is adjusted, making it impossible to drive the pinion or the buttonhole sewing device, embroidery sewing device, etc. placed on top of the pinion, and there is a risk that the pinion may fall off.

The present invention is locked by insertion, and can be easily and securely attached to the throat plate, and when removing the gun, the lock can be released with a single touch.The needle plate is connected to an arm-type sewing machine bed. The purpose of this invention is to use the lid cover which is attached to the shaft as a support so that bobbins etc. can be taken in and out by opening and closing the bed side Iζ when stacking, thereby making the installation firm. Embodiments of the invention will be described with reference to the drawings. The illustrated attachment 1 is removably attached to a free arm type sewing machine bed 2, and the operating mechanism (
An intermittent feed mechanism 3 (an example of such a mechanism is shown in Japanese Patent Application No. 1983/G41.273 proposed by the present applicant Kasaki) interlocks with a A pinion 5 is rotated intermittently, thereby driving a buttonhole sewing device, an embroidery sewing device, etc. mounted on the throat plate 6 and the case.
Inside, in addition to the intermittent feed mechanism described above, there is also a base plate 10 attached to the ceiling inside the case 4 and having support pieces 9.9 formed at both ends of the negative side protruding from the case 4, and a base plate 10 extending from the base plate. It is rotatably supported by a bending branch 11, and has hooks 12 and 12 at both ends on the negative side.
A protruding piece 13 is formed in the middle part, and a knob 1 is formed on the other side.
4, and a spring 16 which is hooked between the projection piece 13 and the intermittent feed mechanism 3, and which always biases the bracket l-15 in the direction of the arrow in FIG. The bed 2 is preferably provided with an insert 18 for the support piece 9 under the throat plate 6, or a lock 19 for hooking.

Attachment 1 to bed 2 is attached using support piece 9.
Insert it into 18 and remove the attachment.
This is done by pushing.

As a result, the hook 12 pivots on the locking portion 19 against the action of the spring 16, and then crosses over and locks the locking portion 19 (see FIG. 7).

The attachment is then locked to the bed. The attachment is removed by pushing up the knob 14 against the action of the spring 16, removing the flap 12 from the locking part 19 to release the lock, and then pulling out the attachment 1.

In the above case, the hook faces upward and is hooked to a downward locking portion (6), or conversely, the hook may be directed downward and hooked to an upward locking portion. In other words, the attachment 1 is attached to the bed 2 in the form of a cantilever, and depending on the degree of pressure applied to the attachment, it may tilt, and the pinion (3 pinions) may be attached to the buttonhole sewing device placed above the attachment. It separates from the embroidery machine and becomes unable to drive the 11* machine.

To deal with this problem, a lid cover is provided on the bed side with its lower end pivoted to the bed machine frame.By opening and closing the lid cover, the bobbin can be taken in and out, and its upper end does not support the bottom of the attachment. That's how it is.

That is, after opening the lid cover 20 and attaching the attachment 1 as described above, the lid cover is pushed in the direction of the arrow in FIG. 3, and its upper end is pressed against the lower surface of the attachment. In order to prevent the lid cover supporting the attachment from opening and coming off the attachment during work, it is preferable to provide a convex portion 21 on the bottom surface of the case 4, and to lock the upper end of the cover to the convex portion. The upper end of the lid cover can be locked to the convex portion by pushing the cover in while lifting the attachment.

When the cover is provided on the bed side as described above, the upper edge of the machine frame that forms the opening into which the lid cover fits is attached to the locking part 1.
9, which is desirable since there is no need to form a new stopper.

The above is an example in which the present invention is applied to an attachment attached to a free-arm type sewing machine bed, or it is also possible to apply the present invention to a conventional square plate equipped with an intermittent feed mechanism. In this case, since the square plate attachment is supported on the bed, not only the center wall is not used as a support for supporting the attachment from below, but also the support piece can be omitted.

The attachment of the present invention is locked by inserting the hook under the throat plate as described above.
Therefore, the attachment can be installed easily and reliably, and the lock can be released or removed easily with a single touch.

In addition, when the attachment of the present invention is attached to a free arm type sewing machine bed, a cover that can be opened and closed and which allows bobbins etc. to be taken in and taken out is provided on the bed side and pivoted to the cover Ml. The attachment can be supported in a cantilevered manner on the bed by 2.
Depending on how much pressure is applied to the rear attachment, it will not tilt and the installation will be more stable.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a free arm type sewing machine with an attachment attached, Figure 2 is a paper view of the attachment,
Figure rjA3 is a perspective view of the locking device, and Figure 9 is a vertical view of the attachment in the installed state. 1... Attachment 21 Bed 30 Intermittent feed mechanism 4... Case 5o Binion 6...
Throat plate 9--Support piece 10--Bed plate 12--Hook 1
4-*Knob 15-Bladder/) 16-Spring 18...
Insert 19... Locking part 2o... Lid cover attorney Akira Sato - 111 Figure 113 Flash

Claims (1)

[Scope of Claims] (1) An attachment that is removably connected to a needle plate mounted on a sewing machine bed, which is rotatably supported by the attachment, and is normally held in place by the action of a spring 16. It has a locking device including a hook 12 that is biased in the direction and a knob 14 integrated with the hook, and when the attachment 1 is pushed toward the throat plate 6, the locking portion 19 provided on the bed side It pivots against the action of the spring 16 and then latches and is locked in the connected state, while
Attachment (2) in which the lock is released by pushing the knob 14; This is an attachment that is attached to a free arm' type sewing machine bed, and the bed 2-@ is equipped with a cover whose lower end is pivotally supported on the bed machine culm and which allows bobbins etc. to be taken in and out by opening and closing the attachment. Attachment 1 is provided and is supported in a cantilevered manner so as to protrude from bed 2 by the connecting means, or attachment (4) is supported at the upper end of the lid cover in the open state. The attachment (6) connecting means according to claim 3, in which a convex portion 21 for locking the upper end of the fish cover is provided on the ms, is rotatably supported by the attachment, and is always supported by the action of the spring 16. The attachment according to claim 3, which includes a locking device having a flap 12 that is biased in one direction and that is hooked to a locking portion on the side of the blade, and a knob 14 that is integrated with the hook. (6) The attachment according to claim 5, wherein the connecting means further includes a support piece 9 inserted into the insert under the throat plate.