JPS639068B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stitching sewing machine equipped with a boring device for cutting holes in the fabric to be stitched during stitching. To provide a needle stitch sewing machine equipped with a boring device that is easy to adjust.

Next, an embodiment in which the present invention is applied to a multi-head embroidery sewing machine will be explained with reference to the drawings. This head is mounted so as to be horizontally movable in the left and right direction via rails 2, 2 installed horizontally on the head 1, and the needle bars 3 to 3 (in this example, 5 needle bars are installed in parallel) are mounted on the head 1 so as to be horizontally movable in the horizontal direction. )
are vertically movable, respectively, and a female bar 4 is vertically movable vertically at the right end of the head 1 in parallel with the needle bar 3 so as to be compatible with the needle bar 3.
Each is moved in parallel by horizontal movement of head 1,
Coordination position R with the drive system for selectively driving the needle bar 3 or female bar 4 (in this example, the third row from the left)
Each can move forward and backward alternately.

Reference numerals 5 to 5 denote sewing needles fixed to the lower end of each needle bar 3, and when the needle bar 3 that has advanced to the linked position R moves up and down, the sewing needles 5 fixed to the needle bar 3 are fixed to the lower end of each needle bar 3.
The knitting operation is carried out in cooperation with a lower sewing mechanism (not shown) such as a hook placed below the sewing needle 5, and a command mechanism (not shown) is extended so as to be horizontally transferable below the head 1. Based on the signal, the needle bar 3 is moved horizontally in synchronization with the vertical movement of the needle bar 3, and the stitching corresponding to the signal is applied to the fabric to be stitched.

Next, a description will be given of the boring device B for incising a hole in the fabric to be stitched prior to stitching. Reference numeral 6 denotes a scalpel attached to the lower end of the scalpel rod 4 via a holder 7; It is supported eccentrically with respect to the front of the female rod 4 and is formed into a tapered conical shape, and when the female rod 4 that has advanced to the linked position R is moved up and down, it cannot pierce the fabric to be pierced. A hole is cut in the same cloth, and the size of the cut hole is expanded or contracted depending on the depth of the piercing into the cloth to be pierced.

Reference numerals 8 to 8 designate connection pins attached to the vicinity of the center of each needle bar 3 and female rod 4, respectively, and extend laterally toward the support frame F side.

Reference numeral 9 denotes a guide shaft vertically disposed near the front end of the support frame F, facing the needle bar 3 or female rod 4 at the interlocking position R. Reference numeral 10 denotes an interlocking piece fitted to the guide shaft 9 so as to be slidable up and down. At this front end, an engaging portion 10a for engaging each connecting pin 8 of the needle bar 3 and female rod 4 is recessed in a substantially U-shape on the side, and the interlocking piece 10 moves up and down. At times, the needle bar 3 or female bar 4 linked to the linked position R is alternatively moved up and down in conjunction with the up and down movement of the linking piece 10 via the connecting pin 8.

Reference numeral 11 denotes a drive link pivotally supported in a swingable manner to drive the interlocking piece 10;
a is rotatably connected to the interlocking piece 10 via a connecting member 12, while the rear end portion 11b is fitted onto a support shaft 13 that is rotatably driven by a motor (not shown) so that the rotation angle can be controlled. The center portion 11c is rotatably fitted into the eccentric collar 16.
is connected to the lower end 15a of the crank 15 which is eccentrically supported within the support frame F via a drive shaft 14, and when the crank 15 moves up and down, the drive link 11 swings around the center of the eccentric collar 16. The interlocking piece 10 is swung up and down as a moving fulcrum S, and the support shaft 13 is rotated by a rotation angle set corresponding to the piercing depth of the scalpel 6, for example, 90°, 180°, etc. When the center of the eccentric collar 16 moves, the swing fulcrum S of the drive link 11 is displaced (see FIG. 4), and the vertical dead center position of the interlocking piece 10 is
As D ₁ and D ₂ move, the vertical dead center position of the scalpel rod 4 interlocked with the interlocking piece 10 moves up and down, and as the bottom dead center of the scalpel rod 4 moves, the cloth to be stabbed by the scalpel 6 moves up and down. The penetration depth is increased or decreased.

In this example, when the swing fulcrum S of the drive link 11 is displaced, the movement adjustment range of the bottom dead center D2 of the interlocking piece ₁₀ is expanded compared to the movement adjustment range of the top dead center _D1 . Swing conditions for the drive link 11 are set.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in the needle stitch sewing machine of this example, the sewing needle 5 is attached to the interlocking piece 10 that is installed to be able to move up and down in a fixed position.
The needle bar 3 equipped with a knife 6 and the female bar 4 equipped with a knife 6 are linked so that they can be selectively linked, while the linking piece 1
0, the drive link 11 supported so as to be able to swing and to displace the swing fulcrum S is articulated, and when the swing fulcrum S of the drive link 11 is displaced, the bottom dead center of the knife 6 moves up and down. Since a boring device is provided which is configured to move to increase or decrease the penetration depth of the scalpel 6 into the fabric to be stabbed, the swinging fulcrum S
By controlling the position of the knife, it is possible to easily change the incision conditions for making a hole in the fabric to be pierced.As a result, the work of changing the position of the scalpel, which was conventionally performed to adjust the penetration depth of the scalpel, can be eliminated and the same procedure can be performed. Holes of various sizes can be easily formed in the fabric to be embroidered.
Furthermore, it has the feature of significantly increasing the sewing efficiency of eyelet stitching.

In particular, in this example, the vertical movement positions of the needle bar 3 and the knife bar 4 are made to match, and the vertical movement positions of the sewing needle 5 and the knife 6 are different, so that the sewing needle 5 and the knife 6 are not aligned with respect to the operating position. This has the effect of reliably alternating movement and adjusting the movement of the bottom dead center of the knife 6 without hindering the sewing operation between the sewing needle 5 and the lower sewing mechanism.

That is, in the stabbing sewing machine of the present invention, a sewing needle that is moved up and down at a fixed position is moved horizontally in synchronization with the up and down movement of the sewing needle based on a signal from a command device. A stitching sewing machine configured to perform stitching in response to a signal from the command device in cooperation with a sewing mechanism provided oppositely thereto, and is installed to be able to move up and down in a fixed position. The interlocking piece is equipped with a needle bar that is provided with the sewing needle and is vertically disposed so as to be able to move forward and backward to a position where it is connected to the interlocking piece, and a scalpel for cutting a hole in the fabric to be punctured prior to sewing. and a vertically disposed female rod that is movable forward and backward to the connecting position in place of the needle bar, is provided oppositely so as to be selectively interlocked with the female rod, and a female rod is provided on the interlocking piece for driving the interlocking piece. The articulated drive link is supported so that it can swing and its swing fulcrum is movable, and when the swing fulcrum of the drive link is displaced, the bottom dead center of the knife moves up and down, thereby causing the knife to move up and down. By providing a boring device configured to increase or decrease the piercing depth of the scalpel, it is possible to easily adjust the incision amount of the extraction hole and to improve the efficiency of eyelet piercing. It is an invention.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a schematic front view of the head, FIG. 2 is a side view of the main parts,
FIG. 3 is a side view showing a state in which the swing fulcrum of the drive link is displaced, and FIG. 4 is an enlarged explanatory view of the swing fulcrum. 3... Needle bar, 4... Female bar, 5... Sewing needle, 6...
... Female, 10 ... Interlocking piece, 11 ... Drive link,
S... Swinging fulcrum, B... Boring device.

Claims (1)

[Claims] 1 A sewing needle that moves up and down at a fixed position cooperates with a sewing mechanism installed oppositely below the sewing needle on the fabric to be stitched, which is horizontally transferred synchronously with the up and down movement of the sewing needle based on a signal from a command device. The needle and stitch sewing machine is configured to operate and perform stitches corresponding to signals from the command device, the interlocking piece being installed so as to be movable up and down in a fixed position is provided with the sewing needle and a vertically installed needle bar that can move forward and backward to a linked position with the interlocking piece;
A scalpel is provided for incising a hole in the fabric to be stitched prior to stitching, and selectively interlocks with a vertically installed scalpel rod that can move forward and backward to the interconnection position in place of the needle bar. a drive link articulated to the interlocking piece for driving the interlocking piece is supported such that it can swing and its swing fulcrum can be displaced, and the swing fulcrum of the drive link is A needle stitcher comprising a boring device configured such that when the knife is displaced, the bottom dead center of the knife moves up and down to increase or decrease the piercing depth of the knife into the fabric to be stitched. sewing machine.