JPS5827757Y2 - Sewing machine gear attachment - Google Patents

Description

[Detailed description of the invention] This invention is a sewing machine equipped with a fabric feeding device that acts on both the upper and lower surfaces of two workpiece cloths to be sewn and gathers the gears on at least one of the workpiece cloths. This relates to the gearing attachment used.

For example, in a vertically adjustable feed sewing machine that has an upper feed dog and a lower feed dog that can individually adjust the feed amount, in order to bring the gears closer to the upper workpiece cloth of two pieces of workpiece cloth to be sewn together, it is necessary to The feed amount of the feed dog is set to a large value, and the gears are sewn together by the difference in feed amount.

In this case, since the two workpiece cloths are in contact with each other, the large feed of one workpiece cloth is not transmitted to the other workpiece cloth, and conversely, the feed of the other workpiece cloth is obstructed by the workpiece cloth with a small feed. Therefore, there is a possibility that the gears that are continuously formed may not be formed accurately and uniformly.

The purpose of this invention is to provide a gearing attachment that solves these problems and allows accurate gearing at all times.

First, with reference to FIGS. 1 and 2, an example of a sewing machine to which the gearing attachment of this invention is attached will be explained only with respect to the parts related to this invention. This sewing machine is generally called a vertically adjustable feed sewing machine, and its arm 1 is provided with a needle bar 3 having a sewing machine needle 2 and a presser bar 4, a mounting body 5 is provided at the lower end of the presser bar 4, and a cloth is attached to the lower end of the side of the mounting body 5. Presser foot 6
A fixed leg 7 having a diameter is fixed by a screw 8.

Further, an upper feed dog 9 that performs a known four-feed motion in conjunction with a sewing machine main shaft (not shown) is movably supported on the mounting body 5, and this upper feed dog 9 is attached to the sewing machine bed ( (not shown) Work cloths C1 and C2 are conveyed in cooperation with a lower feed dog 12 that moves in and out of an opening 11 of a throat plate 10 mounted above to perform a known four-feed motion.

The operating timing of the upper feed dog 9 and the lower feed dog 12 is such that when the upper feed dog 9 is lowered to perform a feed motion, the lower feed dog 12 is raised to perform a feed motion.

Furthermore, the upper feed dog 9 and the lower feed dog 12 each have an adjusting device (not shown) that can adjust the feed amount, and the feed amount can be set individually. When the gears are moved closer to C1, the feed amount of the upper feed dog 9 is set to be larger than that of the lower feed dog 12.

Next, the first embodiment of the gearing attachment attached to the vertically adjustable feed sewing machine having the above configuration will be described.
To explain based on FIGS. 7 to 7, reference numeral 21 shown in FIG. 3 indicates the entire gearing attachment, 22 is a mounting plate, which has a concave portion 23 formed at its tip to make the tip trifurcated, and A locking pin 24 is planted on the edge.

This mounting plate 22 has a recess 2 as shown in FIG.
3, it is fixed to the mounting body 5 together with the fixing leg 7 by the screw 8, and at this time, the latching pin 2 is fixed to prevent the mounting plate 22 from rotating around the screw 8.
4 is hung on the upper surface of the mounting body 5.

Reference numeral 25 denotes a support shaft implanted and fixed at the rear end of the mounting plate 22, and when the mounting plate 22 is fixed to the mounting body 5, the work cloth C1, It is arranged so as to extend in a direction perpendicular to the cloth feeding direction of C2.

26 has both end bent portions 26 a , 26 a and a lower bent portion 2
6 b, with bent portions 26 a at both ends thereof.
, 26a are fitted onto the support shaft 25 so as to be rotatable and slidable along the axial direction, and a thumbscrew 27 is screwed into the support shaft 25 from the back side. ing.

Reference numeral 28 denotes a ruler plate fixed to the upper surface of the lower bent portion 26b of the support body 26 by a caulking pin 29, and has a base end 28a extending in the cloth feeding direction and a ruler plate 28 on the cloth feeding side of the base end 28a. A curved portion 28b that is continuously formed and curved so as to surround the support shaft 25, a free end portion 28C extending in a 90° direction on the left from the tip of the base end portion 28a, and the free end thereof. The guide wall 28d is bent so as to extend downward from the tip of the portion 28C in the cloth feeding direction, and engages with the side edges of the workpiece cloths C1 and C2 during sewing to determine the seam allowance.

With this configuration, if the hinges 27 are tightened now, the curved portion 28b of the ruler plate 28 will be pressed onto the support shaft 25, so that the ruler plate 28 can be moved to any position on the support shaft 25. and is fixed at any rotational position (centered on the support shaft).

As shown in FIGS. 4 and 6, 30 is a rotating plate that is rotatably attached to the corner of the ruler plate 28 by a shaft 31, and has a base end 30a, Hoha 9
The plane is formed into an approximately L-shape by the free end 30b which forms an angle of 0°.

30C is a regulating piece bent on the base end 30a- side of the rotating plate 30, and as shown in FIG. 4, the free end 30b
When the ruler plate 28 is disposed perpendicularly to the feed direction of the work cloths C1 and C2, it engages with the edge of the free end 28C of the ruler plate 28, thereby regulating the position of the rotary plate 30 at that position. There is.

Reference numeral 30d designates an operating piece bent on one side of the free end 30b, and is used to rotate the rotating plate 30.

Reference numeral 32 denotes a cloth separating plate for gearing, and in the operating position shown in FIG. a, and its proximal end 32a extends obliquely in the cloth feeding direction from the presser foot 6 as shown in FIGS. 1 and 2.
, and a free end portion 32b located between the upper feed dog 9 and the lower feed dog 12.

Note that 34 is a recess formed at the tip of the free end 32b, which allows the needle 2 to pass through when the cloth separating plate 32 is in the operating position.

A pair of screws 35 are screwed into the free end 30b of the rotating plate 30, pass through the elongated hole 33 of the cloth separation plate 32, and are screwed into the fixed plate 36, so that the cloth can be inserted between the fixed plate 36 and the fixed plate 36. The separation plate 34 is clamped and fixed.

Therefore, by loosening the screw 35, the cloth separating plate 32
can be adjusted by moving along the elongated hole 33.

Because of this configuration, the operating piece 30 of the rotating plate 30
d and rotate the rotary plate 30 together with the cloth separating plate 32 as needed to move the cloth separating plate 32 to the 1st and 2nd degrees 3.4.5.
It can be located in an active position shown by a solid line in the figure and a non-active position shown by a two-dot chain line in FIG.

Note that 37 shown in FIG. 3 is a retaining ring wound around the outer periphery of the support shaft 25, and is adapted to restrict the leftward position of the support body 26.

Next, to explain the operation, in order to set the attachment 21 on the sewing machine for gearing, first fix the mounting plate 22 to the mounting body 5 of the sewing machine with the screws 8, then loosen the wing screw 27 to allow for seam allowance. The ruler plate 28 is adjusted and fixed on the support shaft 25 according to the movement.

At this fixed position, grasp the operation piece 30d of the rotating plate 30 and rotate the cloth separating plate 32 to the operating position.If the concave portion 34 of the separating plate 32 exactly matches the needle drop point, the setting is completed. do.

If the recess 34 does not coincide with the needle drop point, it is necessary to loosen the screw 35 and adjust the movement of the cloth separating plate 32 along the elongated hole 33.

When the sewing machine is operated, the work cloths C1 and C2 are fed by the feeding action of both feed teeth 9.degree. 12 while being guided by the guide wall 28d.

At this time, since the feed amount of the upper feed dog 9 is larger than that of the lower feed dog 12, gears are gathered on the work cloth C1 on the upper side every time the upper feed dog 9 performs feeding.

In this case, the portions of the upper and lower workpiece cloths C1 and C2 that receive the feed action are separated by the cloth separation plate 32, so that the feeds of both workpiece cloths C1 and C2 do not interfere with each other, allowing accurate gearing. Moreover, since both workpiece cloths C1 and C2 are guided and fed by the guide wall 28d, they are accurately sewn together with their gears gathered together and their seam allowances aligned.

Next, if the feed amount of the upper and lower feed dogs 9 and 12 is the same and sewing is performed using only the ruler plate 28, the cloth separating plate 32 is moved to the shaft 31 as shown by the two-dot chain line in FIG. When the cloth separating plate 32 is rotated to the non-working position about Normal sewing can be performed while matching the seam allowances.

When neither the ruler plate 28 nor the cloth separating plate 32 is used, by loosening the thumbscrew 27 and rotating the ruler plate 28 and cloth separating plate 32 upward, sewing can be performed without them getting in the way. can.

Next, a second embodiment of this invention will be explained with reference to FIGS.
The free end 28C of 8 is made obliquely upward to the right and its axis 31
It is possible to tilt the surface slightly.

That is, as shown in FIGS. 8 to 10a, the rotating plate 3
0 and the cloth separating plate 32 are placed in the operating position, the free end 32b of the separating plate 32 runs along the upper surface of the throat plate 10,
As shown in FIGS. 8 to 10, when the rotating plate 30 and the cloth separating plate 32 are rotated to the inactive position, the cloth separating plate 32 and the rotating plate 30- moves diagonally upward, and the free end 32b of the cloth separating plate 32 moves to the throat plate 10.
It is arranged so that it is spaced apart from the upper surface position of.

Therefore, in this second embodiment, when the cloth separating plate 32 is rotated to the inactive position, the cloth separating plate 32 does not rub the upper surface of the throat plate 10, and the throat plate 10 is not scratched. can be prevented.

Other configurations and operations are the same as those in the previous embodiment.

The above embodiment describes the case in which the present invention is applied to a vertically adjustable feed sewing machine in which gears are also applied to the upper workpiece cloth, but the attachment of the present invention has main and sub-feed teeth that cooperate with the presser foot. It can also be implemented in a differential feed sewing machine in which the feed amount of the auxiliary feed dog is increased relative to the main feed dog so that the gears can move closer to the work cloth below.

As exemplified in the embodiments above, this invention has a proximal end attached to the presser bar of the sewing machine so that it can move along one axis extending perpendicular to the cloth feeding direction and rotate around the one axis. a ruler plate having a free end extending toward the cloth feeding side and having a guide wall at its tip for guiding the edge of the work cloth; A gear shifter whose base end is supported by the free end of the ruler plate, and where the free end can take an active position between two workpiece cloths within an area where the cloth feeding device acts and a non-active position away from there. Since the cloth separating plate for gearing is provided, the gearing can be done accurately.

Moreover, the cloth separating plate can be rotated by a ruler plate supported on the presser foot of the sewing machine so that it can move along one axis extending perpendicular to the cloth feeding direction and rotate around the axis. Since it is attached to the cloth separator plate, it is of course possible to rotate the cloth separator plate independently between the working position and the non-working position, and when neither the cloth separating plate nor the ruler plate is used, they can both be turned inactive. It can be rotated into position.

Furthermore, since the ruler plate and the cloth separating plate are constructed as one unit, it is easy to handle and has many practical advantages.

[Brief explanation of the drawing]

Figures 1 to 7 show the attachment of the first embodiment of this invention, in which Figure 1 is a perspective view showing the attached state, Figure 2 is a sectional view showing the geared state, and Figure 3 is a cross-sectional view showing the geared state. Figure 4 is a perspective view showing the entire structure, Figure 4 is a plan view showing the installed state, and Figure 5 is a perspective view showing the entire structure.
The figure is a side view, FIG. 6 is a plan view showing the relationship with the feed dog, FIG. 7 is a sectional view taken along line 7-7 in FIG. 4, and FIGS.
The figures show a second embodiment of this invention, in which Figures 8a and 1) are partial plan views showing the working and non-working states of the separating plate, and Figures 9a and 1) are respectively Figure 8a,
1) is a sectional view taken along the line 9-9, and FIGS. 10a and 10 are sectional views taken along the line 10-10 of FIGS. 8a and 1), respectively.

Claims (1)

[Claims for Utility Model Registration] 1. In a sewing machine equipped with a cloth feeding device configured to act on both the upper and lower surfaces of two pieces of work cloth to be sewn and to gather gears on at least one work cloth, The proximal end is supported on the presser foot of the sewing machine so as to be able to move along one axis extending in orthogonal directions and rotate around the one axis, and the free end extends toward the cloth feeding side. a ruler plate having a guide wall for guiding the edge of the work cloth; a base end supported by the free end of the ruler plate so as to be rotatable around an axis extending in the vertical direction; A cloth separating plate for gearing, which can take an active position between two work cloths in an area where the cloth feeding device acts and a non-working position remote from the working position, is provided. attachment. 2. A utility model according to claim 1, characterized in that the gearing cloth separation plate is movable and adjustable in a direction perpendicular to the cloth feeding direction when it is placed in the working position. Attachment for sewing machine gears. 3. Registration of a utility model, characterized in that the angle of the axis of rotation of the cloth separation plate for gearing is set so that the free end thereof is raised when it is rotated toward the inactive position. An attachment for gearing a sewing machine according to claim 1 or 2.