JPS62191556A - Method for boring cloth in embroidering machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a rolling stitch sewing machine for sewing eyelets. Regarding how to.

(Prior Art) As a conventional technology, there is, for example, Japanese Unexamined Patent Publication No. 58-4.695.

(Problems to be Solved by the Invention) In conventional boring devices of this type, for example, the eyelets were incised by the shearing action of a scalpel, so there were problems such as parts of the thread remaining uncut and problems with the direction of fabric transport. There were problems such as the necessity of controlling the direction of the knife, which made the mechanism complicated, and the sharpness of the knife deteriorating over time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for boring fabric to be pulled into a thread-stitch sewing machine, which eliminates the above-mentioned problems.

(Means for Solving the Problems) The present invention involves cutting the outline of the eyelet area of the fabric whose transfer is controlled according to the pattern of the eyelet with a heater scalpel heated to the melting humidity of the fabric. The gist is a boring method that cuts out shaped pieces of cloth.

(Function) When applying an eyelet to a heat-fusible fabric, the present invention applies a heating scalpel heated to the melting temperature of the fabric to the fabric whose transfer is controlled according to the eyelet pattern. The eyelet area is configured to be fused along its contour.

(Example) Next, a first example of a device used in the present invention and a method of implementing the present invention using this device will be illustrated and explained.

The eyelet-printed fabric N is placed on the XY-axis plane orthogonal coordinate system by following the eyelet-printing pattern.

A single-head type or multi-head type equipped with a fabric transfer device that is driven and controlled based on a transfer signal from a command device that stores X and Y data corresponding to the eyelet pattern in order to control the transfer intermittently in the Y direction. In this yawn-stitch sewing machine, an elevating member 2 supported so as to be movable up and down relative to the front end of a head body 1 of a sewing machine head M is attached to a main shaft 3 that is rotatably suspended horizontally through the head body 1. It is linked to a crank mechanism and reciprocated in the vertical direction at a fixed position, and an engaging portion 2a that is open to the front and both sides is recessed in its front portion.

The slide case 4 is supported so as to be slidable in the lateral direction relative to the front end of the head body 1, and the slide case 4 is provided with a horizontal direction in response to a switching signal from a command device (not shown) to control the movement of the slide case 4 in the horizontal direction. A slide shaft 5 whose forward and backward movement is controlled is fixed, and an appropriate number of needle bars 6 arranged in parallel at equal intervals are mounted on the slide case 4.
and a female rod 7 are suspended so as to be able to move up and down independently, and a transmission rod 8 installed opposite each needle bar 6 and female rod 7 is suspended so that it can be moved up and down, and furthermore, this transmission rod 8
an interlocking pin protruding in the tangential direction for engaging the two joint portions 2a at the operating position opposite the lifting member 2 and selectively driving the needle bar 6 or the female rod 7 up and down in the operating position; The female rod 7 and the transmission rod 8 can be lowered jointly by engaging with the engaging groove 10a having a cross-sectional opening shape formed circumferentially on the lower end of the sleeve 10 fitted on the upper part of the female rod 7. In order to connect the rod 7 so that its rotation is restricted, a planar U-shaped locking piece 11 extending forward is attached, and the female rod 7 is moved to the operating position together with the transmission rod 8. When displaced, a transmission rod 8 connected to the elevating member 2 via the interlocking pin 9 moves up and down, and the knife rod 7 is moved up and down in conjunction with the transmission rod 8.

A heater knife 12 attached to the lower end of the female rod 7 via a heat insulating member 17 is powered by an AC power source in order to make use of the fabric N and punch a melting hole H in the thermally meltable fabric N when the female rod 7 moves downward. Connection terminal 2 for one variable voltage regulator connected to 18
0, 20 and lead wires 21 and 21, and can heat the heater scalpel 12 to a temperature suitable for melting various types of fabrics N, respectively. And heater female 1
2 is formed with a round bar-shaped base 12a and a conical tip 12b connected below the base 12a. A ceramic heater is used in which a tungsten metal thin film is coated, a 0.25 M thick ceramic of the same quality is pressure-bonded, and then fired.

A horizontal plate 13 placed horizontally below the female rod 7 has a cross section of the heater knife 12 for inserting the heater knife 12 when the heater knife 12 moves downward and perforates the melt hole 1 in the fabric N. A female hole 14 having a slightly expanded shape is provided.

A cloth presser foot 15, which has a hollow side shape, is attached to the lower part of the female rod 7 in order to press the circumference of the perforated part of the cloth N between the horizontal plate 13 and the horizontal plate 13 when the melting hole H is perforated. is biased downward.

The fabric N, which is intermittently transferred based on the eyelet pattern and is in a stopped state, is heated to a predetermined temperature and is actually used by the heater knife 12 that descends at the operating position, and a circular melting hole H is formed in the fabric N. At the same time, the punching operation is repeated each time the fabric N is intermittently transferred and the heater scalpel 12 descends, so that a group of melt holes H arranged endlessly along the contour of the eyelet shape are punched almost continuously. The outline of the eyelet area of the fabric N is cut by repeated lifting and lowering motions of the heater scalpel 12, and the piece N1 of the eyelet shape surrounded by the group of fused holes H is cut out from the fabric N, and an eyelet is bored in the fabric N. can do.

Note that even if the melting holes H are drilled at a slight distance from each other, depending on the heating temperature conditions of the original terminus 12 and the thermal properties of the fabric, the threads in each melting hole H may become carbonized or brittle, and the cloth piece N1 may be cut off. can do.

Next, the functions and effects of the above embodiment will be explained.

Now, in this example, the eyelet is attached to the lower end of the female rod 7 that moves up and down in the operating position, and is used to punch a melting hole 1 in the fabric whose transfer is controlled intermittently according to the pattern of the eyelet. The heated heater scalpel 12 is used every time the female rod 7 moves downward to continuously pierce the melted holes I" group arranged along the outline of the eyelet pattern C, and the outline of the eyelet area A of the fabric N is touched with the heater knife. It is constructed so that the eye reflex 1 to the patterned cloth pieces N1 are cut out from the cloth N by fusing at 12.

Therefore, when boring the fabric N, the eyelet area A
The eyelet can be accurately thermally cut by sequentially heat-melting the threads around the periphery of the eyelet, and the eyelet can be smoothly shaped, and the problem of deterioration of boring performance over time can be solved.

In particular, since the threads on the peripheral edge of the eyelet are thermally welded to each other by fusing the cloth piece N1, the edges of the eyelet can be prevented from fraying and the shape of the eyelet can be balanced and stabilized.

Furthermore, since a ceramic heater scalpel is used in this example, it is possible to suppress welding of molten fibers to the heater knife 12, and also to suppress wear of the heater knife 12 over time, significantly improving the durability of the heater knife 12. It has a potentially improving effect.

Next, a second embodiment of the present invention will be described. In this example, when boring an eyelet, the heater knife is lowered at the start position at the start of fusing and is held at the lower end with a melt hole formed in the fabric N. At the start position, the fabric N applied to the heater scalpel is controlled to be transferred intermittently or continuously according to the eyelet pattern according to the instructions from the command device, and the outline of the eyelet area A of the fabric N is started using the stationary heater knife. The cloth piece N1 in the shape of an eyelet is cut out by sequentially and continuously melting and cutting from the starting position to the starting position, and then TR is applied to the heater knife.

In particular, in this example, the outline of the eyelet area Δ is continuously melted while the heater scalpel is kept stationary, which has the effect of increasing the speed and efficiency of the boring operation.

In addition, when continuously melting the eyelet, as shown in FIG. 6, a heater knife 12A is installed in which a pit 22 with a reduced outer diameter of the tip 22a is fitted near the tip of the heater knife body 12aA using a heat-resistant metal or ceramic material. When used, the cutting width is reduced and the eyelet shape becomes sharp, making it possible to cut eyelet shapes with acute angles.

For other functions and effects of the second embodiment, please refer to the first embodiment.
Since it is almost the same as the embodiment, its explanation will be omitted.

(Effects of the Invention) That is, the present invention melts the outline of the eyelet area of the fabric whose transfer is controlled according to the eyelet pattern with a heater scalpel heated to the melting temperature of the fabric to remove the eyelet pattern from the fabric. By cutting out the pieces, the eyelet can be accurately thermally fused to prevent the edges of the eyelet from fraying, and the problem of deterioration of boring performance over time can be solved.

Note that the shape of the heater knife is not limited to the above embodiment.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG.
The figures are the same front view, Fig. 3 is a plan view of the fabric to explain the boring state, Fig. 4 is an enlarged side view of the heater knife, Fig. 5 is an electric circuit diagram, and Fig. 6 applies to the second embodiment. It is a side view showing a heater knife. 7...Female rod 12,12A...Heater knife A...Eyelet area N...Fabric N1
...piece of cloth

Claims (1)

[Claims] A piece of cloth having an eyelet shape is cut from the cloth by cutting the outline of the eyelet area of the cloth whose transfer is controlled according to the eyelet pattern with a heater scalpel heated to the melting temperature of the cloth. A method of boring fabric on a thread sewing machine.