JPH067880B2 - Holding mechanism for sewn objects - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a holding mechanism adapted to automatically sew a sewn item.

[Prior Art] In general, when sewing a plurality of sewn objects to be sewn, for example, two pieces of cloth, it is well known to perform so-called shirring in which the upper cloth has a space (wavy) with respect to the lower cloth. Has been.

Conventionally, the presser foot of such a folding device is shown in FIGS. 9 and 10.
It was automatically performed by the holding mechanism as shown in the figure. This holding mechanism is for holding the collar portion of the cloth which is folded back with the front body, and holds the cloth by the rotatable collar presser 40 and collar presser receiver 41. Collar presser
A roller 42 and a presser spring 43 are provided at 40, and the presser spring 43 presses the roller 42 against the collar presser receiver 41 side.

Further, below the roller 42, a cam 44 that is linearly moved left and right along a cam shaft 45 by a cylinder 46 is provided.

Before holding the fabric, place the roller 42 on the cam 44 and hold the collar
40 is opened and the cam 44 is moved to the right by the cylinder 46, whereby the collar presser 40 is closed sequentially from the left side to hold the cloth. At that time, the shirring pin is inserted in advance between the two pieces of cloth, the front body and the folded back, to perform the shirring.

[Problems to be Solved by the Invention] In the above-described conventional holding mechanism, since the collar presser 40 is opened and closed by using the above-described single cam 44, it is necessary to open and close the collar presser 40. It was necessary to move the cam 44 by about twice the width of the collar presser 40, which had the drawback of taking up a lot of space.

[Means for Solving the Problems] A holding mechanism of the present invention for solving the above-described conventional problems is provided with a plurality of holding members arranged side by side along the edge of a sewing object, and facing each of the holding members. A pressing member receiver provided,
The cam means includes a plurality of squeezing members that can be inserted between the workpieces arranged between the pressing members, cam means for moving the pressing members up and down, and drive means for driving the cam means. , 2 corresponding cam peaks for each pressing member
It is characterized in that the pressing members are arranged in rows, and the pitch of the cam peaks and valleys is changed to give a differential to the pressing member to move up and down.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 to 8 show an embodiment in which the holding mechanism of the present invention is applied to a sewing machine which is a machine exclusively for front end ground sewing of men's clothing.

First, the overall structure of the sewing machine will be described with reference to FIG. This sewing machine includes a frame 1 having a sewing mechanism 2 and a cloth setting table 3, and an intermediate presser mechanism 4 for pressing a workpiece placed on the cloth setting table 3, a left end holding device 5 and a right end holding device 6. It is equipped with. Reference numeral 7 is an operation panel for controlling sewing. The sewing mechanism 2 moves forward, backward, leftward and rightward to sew a workpiece on the cloth setting base 3.

The left end holding device 5 and the right end holding device 6 are respectively arranged on the left and right sides of the cloth setting table 3 and hold the hem portion or the collar portion of the left front body or the right front body set on the cloth setting table 3.

The left end holding device 5 and the right end holding device 6 are each provided with a collar holding mechanism 9 and a hem holding mechanism 10 on a base plate 12 as shown in FIG. The left end holding device 5 and the right end holding device 6 are rotatably provided with respect to the frame body 1 of the sewing machine, and are rotated by the drive mechanism 30. That is, by rotating the left end holding device 5 and the right end holding device 6 according to the material (left front body or right front body) placed on the cloth setting table 3, the collar is held on the collar portion of the left front body (or right front body). The mechanism 9 is positioned so that the hem holding mechanism 10 is associated with the hem portion to hold each hem.

The collar holding mechanism 9 has a substantially L-shaped collar presser as shown in FIG.
11, collar holder 13, cam drive cylinder 15, cam
17, cam roller 19, and cylinder 21 for driving the pin
And is formed by the sham pin 23.

As shown in FIG. 1, the collar pressing member 11 and the collar pressing receiver 13 are arranged in a substantially <shape according to the shape of the collar portion of the cloth as shown in FIG.

The collar presser 11 is provided so as to be vertically rotatable with respect to the base plate 12, and the collar presser receiver 13 is fixed to the base plate 12 so as to face the collar presser 11. By this, collar hold
When 11 is pushed down, the fabric can be sandwiched and held by the collar retainer 11 and the collar retainer receiver 13. Further, a presser spring 14 is provided between the base plate 12 and the collar presser 11 to constantly urge the collar presser 11 toward the lower collar presser receiver 13 side.

Cam rollers 19 are provided below the collar presser 11, respectively. The cam roller 19 is provided such that the position thereof is shifted back and forth between the adjacent collar pressers 11. That is, the cam rollers 19 provided for every other one with respect to the collar presser 11 are arranged in a line.

The cam driving cylinder 15 is attached to the upper portion of an L-shaped support plate 12a fixed on the base plate 12, and a cam 17 is connected to the rod thereof via a cam connection plate 16.

As shown in FIG. 4, the cam 17 is formed so that a plurality of peaks are provided in two rows and the peaks in each row are staggered. Further, the pitch of the peaks is gradually increased from the left side of the cam 17, and the pitch of the valleys is gradually decreased. Further, the distance between the valleys corresponds to the distance between the cam rollers 19, and as shown in FIG. 4, all the cam rollers 19 are arranged so as to ride on the mountain of the cam 17. Here, when the cam roller 19 falls from the mountain of the cam 17, the pitch of the mountain of the cam 17 is gradually increased from the left side, so that the cam roller 19 riding on the mountain on the left side of the cam 17 falls faster (with a shorter stroke). . On the contrary, when the cam roller 19 rides on the mountain of the cam 17, the pitch of the valley of the cam 17 is gradually reduced from the left side, so that the cam roller 19 on the right side of the cam 17 is faster (with a shorter stroller).
Ride up. As a result, the cam roller 19 or the collar presser 11 can be moved up and down with a differential.

Further, the cam 17 is composed of two cam receiving shafts extending in parallel.
Guided by 18. The drive of the cam drive cylinder 15 is transmitted to the cam 17 via the cam connection plate 16,
Moves left and right along the cam receiving shaft 18.

The bob pin 23 is made up of a plurality of bob pin connection plates.
It is provided so as to be rotatable up and down with respect to a support portion 22a provided on 22. The shirring pins 23 are arranged at a position slightly higher than the collar presser receiving portion 13 between the collar pressers 11, and via the seizure pin driving cylinder 21 and the shirring pin connecting plate 22 provided on the base plate 12. Connected.
By driving the cylinder 21 for driving the shirring pin, the shirring pin 23 is projected and retracted in the longitudinal direction from between the collar pressers 11.

Each locking pin 23 is provided with a locking projection 23a, and the locking projection 23a is adapted to be hooked on the tip of the locking pin upper and lower plate 20 provided on the collar presser 11. That is,
With collar presser 11 closed and retracted pin 23 retracted,
As shown in FIGS. 5 and 6, the locking projections 23a are hooked on the tips of the upper and lower plates 20 of the buckling pin. Further, under each of the buckling pins 23, buckling pin receivers 24 are arranged so as to face each other.

Next, the operation of the collar holding mechanism 9 configured as described above will be described.

First, in the initial state, the cam roller 19 of the collar presser 11 is cammed.
It fell from a pile of 17 and the collar presser 11 is closed. Also, FIG.
As shown in (a), the locking projections 23a of the buckling pins 23 are hooked on the buckling pin upper and lower plates 20 of the collar presser 11.

When the cloth holding signal is sent, the cam driving cylinder 15 operates and the cam 17 moves to the left. By moving the cam 17,
The cam roller 19 rides on the mountain of the cam 17 and the collar presser 11 is shown in FIG.
Lift and open as in (b). Further, the shirring pin 23 is lifted at the same time by the seizing pin upper and lower plates 20 attached to the collar presser 11. In this state, the fabric (the collar part of the predecessor)
Place it on the collar holder 13 and set it.

Next, when the shirring pin 23 is pushed forward by the shirring pin driving cylinder 21, the locking projection 23a is disengaged from the shirring pin upper and lower plate 20, and the shirring pin 23 falls on the dough (see FIG. 7). (c)). At this point, another fabric (collar portion on the return wall) is set on the shirring pin 23. Also, in this state, the cam drive cylinder 15 operates and the cam 17
When is moved to the right side, the cam roller 19 is differentially dropped from the mountain of the cam 17, so that the collar presser 11 is sequentially lowered from the left side to clamp the cloth (FIG. 7 (d)), and at the same time, it is bullied. FIG. 8 shows a state in which the dough is squeezed.

At the time of sewing, since the needle of the sewing mechanism 2 hits the buckling pin 23, the buckling pin 23 is pulled in by the buckling pin driving cylinder 21. Pull-in retracted pin 23
The locking projections 23a of the above are again mounted on the buckling pin upper and lower plates 20 and hooked (FIG. 7 (e)).

After sewing, the cam driving cylinder 15 is operated to lift the collar presser 11 by the cam 17 (the buckling pin 23 is also lifted at the same time), and the cloth is taken out.

In addition, although the case where the present invention is applied to the sewing machine collar holding mechanism has been described in the above embodiment, it is needless to say that the present invention can be applied to the holding mechanism of other sewing objects.

[Effects of the Invention] As described above, according to the holding mechanism of the present invention, a plurality of pressing members that are arranged side by side along the edge of the sewn item, and a pressing member that is provided so as to face each of the pressing members. Member receiving,
The cam means includes a plurality of squeezing members that can be inserted between the workpieces arranged between the pressing members, cam means for moving the pressing members up and down, and drive means for driving the cam means. , 2 corresponding cam peaks for each pressing member
A cam means for vertically moving a holding member for holding a workpiece by arranging the holding members in rows and changing the pitch of the cam peaks and troughs so that the pressing member has a differential structure to move up and down. The amount of movement can be reduced, and the effect of requiring less space can be obtained.

[Brief description of drawings]

1 is a plan view of an embodiment to which a holding mechanism according to the present invention is applied, FIG. 2 is a plan view of a sewing machine to which the present invention is applied, and FIG.
1 is a view showing a state seen from the direction of arrow Q in FIG. 1, FIG. 4 is a view showing a state seen from the direction of arrow R of FIG. 1, and FIG. 5 is a partial perspective view of a holding mechanism according to the present invention. FIG. 6 is a view showing a state seen from the direction of arrow S in FIG. 5, FIGS. 7 (a) to 7 (e) are views for explaining the operation of the holding mechanism according to the present invention, and FIG. FIG. 9 is a front view of a conventional holding mechanism, and FIG. 10 is a side view of the holding mechanism shown in FIG. 9. 1: Frame, 2: Sewing mechanism 5: Left end holding device, 6: Right end holding device 9: Collar holding mechanism, 10: Hem holding mechanism 11: Collar presser, 12: Base plate 13: Collar presser receiver, 15: For cam drive Cylinder 17: Cam, 19: Cam roller 20: Bock pin top and bottom plates 21: Bock pin drive cylinder 23: Bock pin

Claims (1)

[Claims] 1. A plurality of pressing members arranged side by side along an edge of a sewn object, pressing member receivers provided to face each of the pressing members, and the pressing members arranged between the pressing members. A plurality of squeezing members that can be inserted between the sewn items, cam means for moving the pressing member up and down, and driving means for driving the cam means are provided, and the cam means are arranged to face each pressing member. And movable in a direction that crosses the holding member 2
There are rows of cams, the two rows of cams have a plurality of cam lobes arranged in the direction of movement thereof and capable of contacting the pressing member, and the two rows of cams have one cam lobe and the other cam lobe. The pitches of the cam peaks are arranged so as to be offset from each other in the moving direction of the cams.
A holding mechanism for an article to be sewn, wherein each pressing member is sequentially moved up and down by movement of a row cam.