JPS6221270Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention consists of a main feed dog, a sub-feed dog that can change the amount of feed of the work cloth with respect to the main feed dog, and a sub-feed dog that presses the work cloth against the sub-feed dog. The present invention relates to a pleating device for an overedge sewing machine, which is equipped with a presser foot for pleating a workpiece fabric in cooperation with the feed movement of the machine.

A conventional shirring device for an over-edge sewing machine will be explained based on FIGS. 1 and 2. 1 is a machine frame of an over-edge sewing machine, and a known presser foot 2 and the presser foot 2 cooperate with each other. A main feed dog 3 and a sub feed dog 4 located on the cloth feed side of the main feed dog 3 are provided for feeding the work cloth. The feed amount of the sub-feed dog 4 can be varied with respect to that of the main feed dog 3.

A mounting base 5 protrudes from one side of the machine frame 1 located on the operator's side, and a U-shaped support frame 6 is screwed into the right end of the mounting base 5 and is pivotally mounted by a shaft 7 so as to be horizontally rotatable. . Reference numerals 8 and 9 designate a pair of clamping pieces protruding from the left side of the mounting base 5 to face each other, and the abdomen 10 of the support frame 6 is clamped between the clamping pieces 8 and 9. Reference numeral 11 denotes a locking piece that projects horizontally from the right side surface of the support frame. Reference numeral 12 denotes a holding frame consisting of a hollow cylindrical portion 14 having a through hole 13 and a leg piece 15 protruding from one side of this hollow cylindrical portion 14. An adjustment rod 17 is inserted into a through hole 16 formed in the leg piece 15. The adjustment rod 17 is pivoted to a leg receiver 6a that projects upward from the middle part of the middle side of the support frame 6, and is arranged substantially parallel to both end sides of the support frame 6. At this time, the through hole 16 is set to have an inner diameter slightly larger than the diameter of the adjustment rod 17.

Reference numeral 18 denotes an adjustment knob that is threadably engaged with the upper end of the adjustment rod 17, and a first spring 19 is interposed around the adjustment rod 17 between this knob and the leg piece 15 of the holding frame 12. This first spring 19 is used to constantly apply a force to press the work cloth to a work press plate, which will be described later, and the spring pressure is adjusted by rotating the adjustment knob 18. Reference numeral 20 denotes an operating shaft, which extends in a direction substantially perpendicular to the cloth feeding direction and is connected to the hollow cylindrical portion 14 of the holding frame 12 and bearing portions 21 and 22 integrally formed on both ends of the U-shape of the supporting frame 6. The operating shaft 20 and the holding frame 12 are integrally connected by a set screw 23 screwed into the hollow cylindrical portion 14, so that they twist and rotate as one. Reference numeral 24 denotes a cloth presser plate whose one end is connected to the left end of the operating shaft 20, and the presser portion 24 cooperates with the auxiliary feed dog 4 to perform the action of pleating the workpiece cloth interposed between them. It is something. Reference numeral 26 denotes a lifting arm that moves the presser plate 24 upward by rotating the operating shaft 20. One side of the L-shape is connected to the right end of the operating shaft 20, and the other side is arranged horizontally in the direction of the mounting base 5. .

Reference numeral 27 denotes a handle connection part, one end of which is bent vertically to form a handle connection piece 28, with a handle connection hole 2 in the center.
Open 9. In addition, the handle connecting piece 28 is attached to the other end.
A lifting arm abutting piece 30 is formed that projects parallel to the lifting arm. The center portion of the handle connecting portion 27 is attached to the right side surface of the U-shaped right side of the support frame 6 using a set screw 31 so as to be able to rotate vertically. At this time, the lifting arm abutting piece 30 is arranged at the lower part of the other side of the lifting arm 26. 3
2 is an L-shaped second spring, with one side attached to the support frame 6.
is fixed on the right side of the U-shape, and the other side extends to the upper surface of the attachment portion of the lifting arm abutting piece 30 of the handle connecting piece 27, and abuts downward with a predetermined elastic force.
Therefore, the lifting arm abutting piece 30 is always urged downward and contacts and presses the locking piece 11 of the support frame 6, so that a certain distance l is maintained between the lifting arm 26 and the locking piece 11 of the support frame 6. to face. Reference numeral 33 denotes a handle whose base end is fixed to the handle connection hole 29, and the other end protrudes from the front surface of the machine frame 1 in a right angle direction.

Next, the operation of this conventional example will be explained.

During the sewing operation of the overcut sewing machine, the leg pieces 15 of the holding frame 12 are held against the support frame 6 by the first spring 19.
, the integrally connected actuating shaft 20 receives rotational force in the same direction, and the cloth holding plate 24 is urged to turn in the direction of the sub-feed dog 4, thereby holding the work cloth on the side. Always press the feed dog in 4 directions. Therefore,
Due to the four-feed motion of the sub-feed dog 4, the presser plate 24 rotates in the vertical direction, and this is transmitted to the operating shaft 20 as a torsional rotational motion.
The lifting arm 26 connected to the holder also reciprocates up and down. However, since the lifting arm abutting piece 30 is maintained at a constant distance from the lifting arm 26 by the second spring, the reciprocating movement of the lifting arm 26 is not transmitted to the lifting arm abutting piece 30. Therefore, the handle 33 connected to the handle connecting portion 27 can remain stationary, and vibration and noise can be prevented.

Further, the operation of operating the handle 33 to retract the cloth presser plate 24 to an upper non-operating position will be described. In order to remove the sewing cloth from the cloth presser plate and the feed dog, the cloth presser plate 24 must be retracted upward. By rotating the handle 33 downward, the lifting arm abutting piece 30 is pushed upward against the downward pressing force of the second spring 32 and comes into contact with the lifting arm 26. 26 rotates around the operating shaft 20. In this way, the operating shaft 20
Since the presser foot plate 24, which is integrally fixed to the presser foot 2, can be retracted to an upper inactive position, the work cloth can be removed together with the lifting means for the presser foot 2.

Further, the operation of horizontally rotating the cloth presser plate 24 toward the operator's side by operating the handle 33 will be explained. When threading a needle or looper, the work is obstructed unless the cloth presser plate 24 extending to the sewing section of the sewing machine such as the needle is moved. For this purpose, with the threaded shaft 7 as the pivot point (center), the presser plate 2 is
4 and the support frame 6 supporting it are horizontally rotated to the right to a non-active position in front of the operator, and are operated by a handle 33. This is because when the operator moves the handle 33 horizontally to the right, the support frame 6 is pulled out from the clamping pieces 8 and 9 attached to the mounting base 5 so as to be clamped on the left side of the abdomen of the support frame 6, and then further on the abdomen. It rotates in the right horizontal direction using the screw-in shaft 7 pivoted to the mounting base 5 on the right side as a pivot point (center). When the support frame 6 rotates, the operating shaft 20 and the work press plate 24 fixed to the operating shaft 20 also operate in the same manner.
Therefore, the cloth presser plate 24 that was in contact with the sub-feed dog 4
can be retracted to the right horizontal inactive position.

However, the pleat removing device of the hem stitching machine according to the conventional example is
(Fig. 3) In order to increase the convenience of sewing work by installing the upper surface and the upper surface of the table 35 on the same plane, a hem sewing machine equipped with a shirring device is fitted into the recess 36 of the table 35. In case, the lid 35a of the table 35 is
Even if an attempt is made to open the handle, the handle 33 protrudes vertically from the machine frame 1, and the lower part of one end of the handle connecting portion 27, which is integrally connected to the handle 33, is in contact with the locking piece 11, so that the handle connecting portion The handle 33 could not be rotated upward around the setscrew 31 of No. 27, and the table 35 could not be opened because the handle 33 got in the way.

The purpose of the present invention is to provide each function of the shirring device of the conventional hem stitching machine, namely, a handle vibration isolation mechanism when the hem stitch machine is operated, a mechanism for upwardly rotating the presser foot plate, and a mechanism for rotating the presser plate right horizontally. Another object of the present invention is to provide a handle having a mechanism for rotating and retracting the handle upward.

The present invention will be explained below based on the embodiments shown in FIGS. 4 to 7. In each figure, the same reference numerals are given to the parts corresponding to those shown in FIGS. 1 to 3, and redundant explanation will be omitted.

In the present invention, the handle connecting portion 27 of the conventional example is divided into a handle action piece 37 and a lifting action piece 38. The handle action piece 37 has an L-shape and has a handle 33 connected to its base, and has a screw hole 37a on the base side and a hole 37 on the other side substantially parallel to the handle 33 on the other side.
b.

The lifting action piece 38 has a hole 38a at its base end, a cutout groove 38b on the lower surface of the intermediate portion, and the other end is bent horizontally so that the action piece 3 is opened at a right angle from the lower surface.
Forms 8C. Therefore, the other side of the handle action piece 37 is placed on the right side of the U-shaped right side of the support frame 6, and the fulcrum step screw (engaging protrusion) 39 is inserted into the support screw hole provided approximately at the center of the right side of the support frame 6. They are rotatably screwed together through the hole 37b. Screw hole 3 of handle action piece 37
7a, it overlaps with the hole 38a of the lifting action piece 38 and is rotatably screwed together with a stepped screw 40.
At this time, the head of the step screw (engaging protrusion) 39 fits into the notch groove 38b of the pulling-up action piece 38, and the second spring 32 is attached downward to the upper part of the base end of the action piece 38c of the pulling-up action piece 38. By constantly pressing, the lower part of the proximal end of the action piece 38c is pressed against the support frame 6 by the pressing force.
It comes into contact with the locking piece 11 and presses it. Further, the upper surface of the other end of the working piece 38c is disposed below the lifting arm 26, but the working piece 38c and the lifting arm 26 are not directly in contact with each other, but are arranged opposite to each other with a constant distance 1 between them.

Next, the operation of the present invention will be explained.

First, regarding the handle vibration damping mechanism during operation of the overedge sewing machine, the material presser plate 24, which passes through the work cloth and contacts the vertically vibrating sub-feed dog 4, is connected to the sub-feed dog 4.
This is the operating shaft 20 and the lifting arm 2.
6 in turn. However, as described above, since the lifting arm 26 and the action piece 38c are disposed facing each other with a constant distance therebetween, the lifting action piece 38 remains stationary without being subjected to vibration. Therefore, the handle action piece 37 and the handle 33 can also be made stationary in the same way.

In addition, in order to rotate and retract the presser plate 24 upward, when the handle 33 is rotated downward, the step screw 39
Since the hole 38a of the lifting action piece 38 similarly rotates downward around It rotates upward about the contact point, and this movement contacts the lifting arm 26 against the constant downward pressing force of the second spring 32, and further pushes it upward. The operating shaft 20, which is fixed integrally with the lifting arm 26, rotates in the same direction as the rotation of the lifting arm 26, and can rotate the work presser plate 24 fixed to the other end upward.

Regarding the action of horizontally rotating the presser plate 24 to the right, when the operator moves the handle 33 horizontally to the right, the handle connecting portion 27 and the support frame 6 with the handle connecting portion 27 attached to the right end also move to the right. It is biased in the horizontal direction (Figure 7). As mentioned above, the support frame 6 is held by the clamping pieces 8 and 9 on the left side of the abdomen with respect to the mounting base 5, and is supported by the screw shaft 7 on the right side of the abdomen.
Therefore, when the support frame 6 attempts to move horizontally to the right, the left side of the abdomen of the support frame 6 is pulled out from the clamping pieces 8 and 9, and the support frame 6 is moved to the right of the worker using the screw shaft 7 as the pivot point (center). Rotate horizontally. Then,
Due to the rotation of the support frame 6, the presser plate 24 mounted on the operating shaft 20 is also horizontally rotated to the right from the sewing machine sewing section to the non-operating position through the side in front of the operator. Therefore, the presser plate 24 can similarly be rotated in the right horizontal direction through the operating shaft 20 inserted through the bearings 21 and 22 of the support frame 6.

Finally, to explain the operation of rotating and retracting the handle upward (Fig. 6), the handle 33 is
It can be rotated upward together with the handle action piece 37 about 9 . At this time, the hole 38a of the lifting action piece 38 rotates upward as the handle action piece 37 rotates, but the center point of the rotation is the step screw 3.
9, the amount of upward movement is minute, and the lower part of the action piece 38c is slightly converted into a corresponding horizontal movement and slides on the locking piece 11 of the support frame 6 in the direction of the machine frame. Only. Therefore, the handle 33 can be rotated to a position perpendicular to the upper plane of the support frame 6 without coming into contact with anything. Therefore, the table 35 with the hem sewing machine fitted into the recess 36
When opening the lid 35a upward, it can be opened completely without being obstructed by the handle 33.
Moreover, even when the table 35 is closed, the handle 33
can be rotated downward to return to the position where the step screw 39 of the connecting handle action piece 37 and the notch groove 38b of the lifting action piece 38 come into contact with each other, and each of the above-mentioned mechanical operations can be executed.

As described in detail above, according to the present invention, it is possible to sew a hem without damaging the handle vibration isolation mechanism, the upward rotation mechanism of the presser plate, and the right horizontal rotation mechanism of the presser plate during operation of the conventional hemlock sewing machine. When the sewing machine is fitted into the recess of the sewing machine table, the handle can be rotated upwards so that it does not get in the way when opening and closing the table. can be opened and closed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example of a shirring device installed in an overstitch sewing machine, Fig. 2 is an explanatory diagram showing the cloth feed dog and presser foot plate of an overstitch sewing machine, and Fig. 3 is a perspective view showing a conventional shirring device installed in an overstitch sewing machine. Fig. 4 is a perspective view illustrating that the fabric table surface and the table surface of the overlocking sewing machine are fitted in the recessed portion of the overlocking machine so that the table surface is flush with the surface of the overlocking machine. FIG. 5 is a partially exploded perspective view of the embodiment shown in FIG. 4, FIG. 6 is a perspective view of the embodiment shown in FIG. 4 with the handle rotated upward, and FIG. This figure is a perspective view showing a state in which the handle is rotated in the right horizontal direction in the embodiment shown in FIG. 4. Explanation of symbols, 2... Presser foot, 4... Sub feed dog, 5... Mounting base, 6... Support frame, 7... Screwed shaft, 11... Locking piece, 12... Holding frame, 20 …
... Operating shaft, 24 ... Cloth press plate, 26 ... Lifting arm, 27 ... Handle connection part, 28 ... Handle connection piece,
29... Handle connection hole, 30... Lifting arm contact piece, 31... Set screw, 32... Second spring, 3
3...handle, 34...cloth stand, 35...table,
35a...lid, 36...table recess, 37...
Handle action piece, 37a... screw hole, 37b... hole,
38... Pulling action piece, 38a... Hole, 38b
...Notch groove, 38c... Working piece, 39, 40...
Step screw.

Claims (1)

[Scope of utility model registration request] A support frame 6 which is attached to the operator side of the machine frame of an overcut sewing machine, is pivotally connected to be rotatable in the right horizontal direction, and has a locking piece 11 horizontally protruding from the side surface on the side of the pivot point 7.
and an operating shaft 20 that is rotatably supported by the support frame 6 and extends in a direction substantially perpendicular to the cloth feeding direction.
For pleating the work cloth in cooperation with a feed dog fixed to the end of the operating shaft 20 located on the opposite side of the pivot point 7 of the support frame 6 and located on the operator side of the differential feed sewing machine. The cloth presser plate 24 and the cloth presser plate 2
4, a first spring 19 is stretched between the workpiece holding plate 24 or the operating shaft 20 and the support frame 6, and the operating shaft 20
A lifting arm 26 is fixed to the opposite end of the presser plate 24 and has a tip extending toward the machine frame, and a pivot point 7 of the support frame 6 is located between the lifting arm 26 and the support frame 6. A handle operating piece 37 has a handle 33 that is pivotally mounted on a side surface so as to be pivotable up and down and fixed in a direction perpendicular to the front surface of the machine frame, and has an engaging protrusion 39 on the machine frame side, and a base end. is pivotally attached to the handle attachment portion side of the handle operation piece 37 so as to be rotatable up and down, the notch groove 38b formed on the intermediate lower surface abuts the engagement protrusion 39 of the handle operation piece 37, and the other end is set at a right angle. Extending the action piece 38c bent below the lifting arm 26,
and a lifting action piece 38 whose other end lower part is disposed above the locking piece 11 of the support frame; one end is fixed to the support frame 6, and the other end is constantly pressed downward from the other end upper part of the lifting action piece 38; A second spring 32 is provided to maintain a constant distance l between one end 38c of the lifting arm 26 and the lifting arm 26, and when the handle 33 is rotated upward, the pivoting portion 37 of the handle arm 37 is provided.
The support frame 6 together with the handle action piece 37 is centered around b.
A crimping device for a hem sewing machine, characterized in that it can rotate at least in a vertical direction.