JPH0220272B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The invention of this application relates to a sequin feeding device for a sewing machine. In particular, it relates to a feeding device for belt-shaped spangles.

(Prior Art) In the conventional example, the feeding device for sewing the band-shaped sequins onto the fabric below the needle attached to the needle bar of the sewing machine consists of a sequin feeding roller and a rotation drive device for the shaft of this roller. has. The outline will be explained with reference to the attached FIG. 5.

The sequin feeding roller a has protrusions b protruding from its outer periphery at predetermined intervals (corresponding to the spacing between the holes in the band-shaped sequins). The feed roller a is configured to be rotatable in only one direction by its shaft c. A band-shaped sequin S wound around a bobbin e rotatably provided on a support arm d is introduced into a sequin guide groove f. The feed roller shaft c is provided with a drive device (not shown) connected thereto, and when the drive device rotates in the direction of the arrow, the belt-shaped sequins S introduced and supplied into the guide groove f are
The protrusion b of the sequin feed roller a fits into the hole h, and the sequin strip S is sent out in the direction of the needle drop g. At the position of the needle drop g, the needle i housed in the needle bar case j descends. Sequin piece hole h
At the same time, the cutting device k operates to cut the connecting portion c (FIG. 4) of the sequin strip S.
The cut sequin piece _S1 is sewn onto the fabric by the cooperative action of the needle i to which the sewing thread is attached and the thread take-up l. Next, the band-shaped sequins S are sent out one after another and are repeatedly cut and sewn.

(Problems to be Solved by the Invention) In the conventional example described above, the sequin feed roller a is configured to rotate by the operation of the feed roller shaft c that is fitted and fixed approximately in the center of the sequin feed roller a. It is necessary to provide a driving device. Usually, this shaft is connected to a drive motor or the like, and therefore, there are problems in that a large and complicated device must be employed in addition to the feed roller to operate the feed roller shaft c.

(Means and operations for solving the problem) Therefore, the present invention aims to provide a sequin feeding device with a simple structure, in which a supporting column erected on a side plate is swayed by the elastic force of a spring. a curved arm pivotally connected to be movable; and an actuating arm having one end pivotally connected to the support column so as to be swingable by the elastic force of a separate spring in parallel with the curved arm, and a pin protruding from the other end. a locking arm, one end of which is pivotally connected to the other end of the curved arm, the other end of which is provided with an engagement groove that can fit into the pin of the operating arm, and further has a slit groove in its center; A pin that can be engaged with the slit groove of the locking arm is provided at one end, and the engagement groove of the locking arm is engaged with the pin of the actuating arm through the slit groove and the pin by swinging due to the action of the actuating device. The locking arm is provided with a removable operating lever, and when the needle bar moves up and down, a drive pin provided on the needle bar contacts the outside of the curved arm and swings the curved arm. , the sequin feed roller is intermittently rotated in a predetermined direction by activating a drive lever pivotally connected to a part of the actuation arm via the actuation arm, and a feed roller protrusion that can be engaged with a hole in the band-shaped sequin; The belt-like sequins are sent out by moving the sequins.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 4 is a schematic diagram of the needle bar drive device adopted in the present invention, in which the protrusion 38 of the needle drive ball 36 attached to the needle bar 30 is connected to the needle bar drive box 42 fixed to the needle bar drive bar 40. can be engaged with the groove 44 of. Needle bar drive box 4
When the crank arm 46 connected to the needle bar drive box 42 moves up and down by the operation of the eccentric cam drive device 48, the needle bar drive box 42
The needle bar drive rod 40 slides up and down while being supported by the needle bar drive rod 40, so that the protrusion 3 fits into the groove 44 of the drive box 42.
The needle bar 30 engaged at 8 is supported by bearings 52a and 52b provided in the needle bar case 4, and the needle 32
It also moves up and down. A thread take-up 56 is mounted on the upper surface 54 of the sewing machine head behind the needle bar case 4 so as to be able to rotate in synchronization with the movement of the needle bar 30. Due to this rotation, an end 57 of the thread take-up 56 can be moved up and down. Pull up or loosen the upper thread attached to the needle 30.

In FIG. 3, the side plate on which the sequin feeding device according to the present invention is attached is shown. A pair of interlocking arms 8, 8 and a coil spring 9 are installed diagonally on the needle bar case side plate 2 and the side plate 6 which can be raised and lowered, and one of the interlocking arms is raised and lowered by a cylinder 10, so that the side plate 6 can be moved up and down. It is locked to the side plate 2 so that it can move up and down. Since this locking device for the side plate 6 is not directly related to the present invention, a detailed explanation thereof will be omitted. The lower end of the side plate 6 is provided with a drive lever 12 connected to a feed mechanism of the present invention to be described later, and an actuation lever 16 that is pivotally supported by the drive lever 12 and fixed to a sequin feed roller 14.
As the operating lever 12 is moved up and down by the operation of the feeding mechanism, the sequin feeding roller 14 is intermittently rotated only in the direction of the arrow via the feeding roller 14, and the projection 18 protruding from the outer periphery of the sequin feeding roller 14 rotates through the feeding groove 19. The band-shaped sequins S are continuously supplied from the bobbin 20 rotatably attached to the arm 21, and are inserted into the hole h and moved, thereby being sent out in the direction of the arrow. The connecting portion C of the fed-out sequin strip S is cut by the cutting device 22, and at the same time, the needle 31 attached to the needle bar 30 is inserted into the hole h of the sequin strip _S1 together with the upper thread to penetrate the fabric W. Then, the sequin piece _S1 is sewn onto the fabric W in cooperation with the bobbin thread fed out from a bobbin provided below the work table below the fabric.

A solenoid 24 is located approximately in the center of the side plate 6 that can be raised and lowered.
Attach. This solenoid is linked to an actuation lever 88, which will be described later.

FIG. 1 is a rear view of FIG. 3. A sequin feeding mechanism according to the present invention is disposed on the side plate 6.

A support column 62 is provided protruding from the side plate 6, and this support column 62
The actuating arm 64 is rotatably inserted into the opening (FIG. 2).
A pin 68 projects on the actuating arm 64 proximate the end 66 of the actuating arm 64 . An end portion of the drive lever 12 is pivotally attached to the protruding leg portion 70 . The torsion spring 72 is installed between the operating arm 64 and the support column 62 on the side plate 6 side. Torsion spring 72 is biased clockwise toward FIG. A curved arm 74 is further pivotally supported on the support column 62 so as to overlap the operating arm 64.
Another torsion spring 76 is mounted on the support column 62 between the curved arm 74 and the curved arm 74, and this torsion spring 76 is biased clockwise in FIG. An end of the torsion spring 76 is attached to a pin 75 protruding from the side plate 6. The curved arm 74 has an engagement groove 78 at its end.
A locking arm 82 having a slit groove 80 in the center is pivotally attached 84 to the locking arm 82 . The side plate 6 is provided in the slit groove 80.
A pin 90 provided on the upper surface of the actuating lever 88, which is pivotally supported by a pin 86 protruding from the actuating lever 88, is fitted so as to be movable laterally. When the solenoid 24 is actuated, the operating lever 88 rotates about the pin 86 in the direction of arrow A, and at the same time rotates about the pin 9.
0, the locking arm 82 is moved in the direction of arrow B through the slit groove 80, and the end engagement groove 78 is inserted into the pin 68.
The operating arm 64 and the locking arm 8
2. The curved arms 74 are interlocked with each other to support the support column 62.
It can be rotated as a unit around the center.

Reference numerals 92, 94, and 96 indicate curved arms 74, respectively;
This is a locking pin that restricts movement of the operating arm 64 and operating lever 88. 98 is a lever that rotatably operates the operating arm 64. A support piece 37 is provided on the drive ball 36 of the needle bar 30 housed in the needle bar case 4, and a drive pin 100 is provided protruding from the support piece 37.

Next, the operation of the sequin feeding device will be explained.

When the solenoid 24 is activated and the actuating lever 88 is moved in the direction of the arrow A with the pin 86 as the center, the pin 90 of the actuating lever 88 that is engaged with the slit groove 80 of the locking arm 82 moves in the direction opposite to the arrow A. As the locking arm 82 moves, the locking arm 82 moves in the direction of arrow B, and its engagement groove 78 slides into the root of the pin 68 of the actuating arm 64, and the actuating arm 64 and the curved arm 74 are connected via the locking arm 82. It will be in a linked state. Therefore, when the curved arm 74 is moved left and right in the direction of the arrow, the actuating arm 64 and the curved arm 7
4, they can simultaneously move in the same direction around the support column 62. In this state, if the needle bar 30 is now moved up and down by the operation of a known drive device, the drive pin 100 protruding from the support piece 37 of the drive ball 36 will intermittently come into contact with the outside of the curved arm 74. The curved arm 74 is swung left and right (towards FIG. 1). At this time, it goes without saying that the torsion springs 72 and 76 wound around the support column 62 move together. In response to this swinging motion, the operating arm 64 swings about the support column 62 in the direction of the arrow (FIG. 2).
Due to this swing, the protruding leg portion 70 of the operating arm 64 moves up and down in the direction of the arrow together with the drive lever 12. The movement of the drive lever 12 is transmitted to the sequin feed roller 14 via the operating lever 16, and as described above, this roller rotates intermittently in the direction of the arrow, thereby feeding out the band-shaped sequins S in the direction of the arrow.

Furthermore, a support piece 37 for the needle bar driving ball is provided on the outside of the curved arm 74.
After the driving pin 100 protruding from the upper part comes into contact with the lower part during rising and moves the curved arm 74 and the actuating arm 64 to the left (towards FIG. 1) against the elastic rotational force of the torsion springs 72 and 76, When the drive pin 100 is released from contact with the curved arm 74 during descent, the curved arm 74, The actuating arm 64 is directed to the right (toward Fig. 1)
Move to. In this manner, the swinging movement of both arm portions 74, 64 is performed.

(Effects) The sequin feeding device of the present invention controls the integrated movement of the curved arm, locking arm, and operating arm by turning ON and OFF the solenoid, and also controls the movement of the plurality of arms by raising and lowering the drive pin of the needle bar. The sequin feeding roller stops or starts its movement via the sequin feed roller, and the related components can be placed on the side plate, making it more compact than the conventional large and cumbersome one. It has the effect of not requiring space.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a sequin feeding device of a sewing machine according to the present invention. FIG. 2 is a side view showing the interlocking relationship between the operating arm and the drive lever. FIG. 3 is a side view of the side plate of the needle bar case opposite to that shown in FIG. 1, which can be raised and lowered. FIG. 4 is a schematic side view of the needle bar drive device employed in the present invention. FIG. 5 is a schematic side view of a conventional sequin feeding device. FIG. 6 is a plan view of band-shaped sequins. 4... Needle bar case, 6... Side plate that can be raised and lowered, 1
2... Drive lever, 24... Solenoid, 30...
Needle bar, 31... Needle, 36... Needle driving ball, 37...
Support piece, 62... Support column, 64... Operating arm, 6
8,86,90...Pin, 70...Protruding leg, 7
2, 76... Torsion spring, 74... Curved arm,
78...Engagement groove, 80...Slit groove, 82...
Locking arm, 88...operating lever, 100...driving pin.

Claims (1)

[Scope of Claims] 1. A curved arm 74 pivotally attached to the support column 62 erected on the side plate 6 so as to be swingable by the elastic force of a spring, and a curved arm 74 swingable in parallel with the curved arm 74 by the elastic force of another spring. an actuating arm 64 having one end pivotally connected to the support column 62 and a pin 68 protruding from the other end;
A locking arm 82 is provided with an engagement groove 78 that can be fitted into the locking arm 82, and further has a slit groove 80 in the center thereof, and a swingable operating lever 88 that is provided with a pin 90 that fits into the slit groove 80. The engaging groove 78 of the locking arm 82 can be engaged with and detached from the pin 68 of the operating arm 64 via the pin 90 and the slit groove 80 by the swinging of the operating lever 88, and by the vertical movement of the needle bar 30. The drive pin 100 contacts the outside of the curved arm 74 and causes the curved arm 74 to swing, thereby causing the locking arm 8
2. Sequin feeding of a sewing machine characterized by operating the drive lever 12 pivotally connected to a part of the operating arm 64 via the operating arm 64 to intermittently rotate the sequin feeding roller 14 in a predetermined direction. Device. 2. The sequin feeding device for a sewing machine according to claim 1, wherein the spring is a torsion spring. 3. The sequin feeding device for a sewing machine according to claim 1, wherein torsion springs are installed in the operating arm and the support column, and in the curved arm and the support column, respectively. 4. A sequin feeding device for a sewing machine according to claim 1, wherein a drive pin provided upright on a support piece provided on a needle bar drive ball can freely come into contact with the outside of a curved arm during operation of the needle bar. 5. The sequin feeding device for a sewing machine according to claim 1, having an operating arm having a drive lever pivotally connected to the protruding leg.