JPH033589Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is designed to eliminate weaving damage caused by misexplosion of wefts in fragment looms that sequentially weave a plurality of different fragment wefts to weave flowers, tatami mats, etc. This relates to a device that prevents this without stopping the loom.

<Prior Art> Various methods have been used in the past to stop weft formation and eliminate weaving defects when a weft misfire occurs. For example, in bag weaving using a piece loom equipped with a single stitch device, four weft strips are repeatedly woven, but if one of the weft strips fails, the loom is stopped by the dry stitch prevention mechanism. The method was to manually rotate the loom to remove the remaining three weft strips and then restart the loom. Recently, a method has been proposed in which even if a weft fails, one or several wefts that go around to the next identical weft are forcibly made to fail, and weaving continues without stopping the loom. (Utility Model Publication No. 59-189884, Japanese Patent Application Publication No. 59-26557)
No. etc.). For example, a method such as installing a shielding plate at the entrance of the latspa to prevent the latitudinal rays from entering the latitudinal passage.

However, even if there is an unexploded weft strip and it is detected by the single stitching device, it is impossible to stop the ejection of the weft strip to be woven next because the weft strip to be woven next is already on the verge of being sent to the injection roll. Therefore, in order to prevent the weft stripes from being woven in, as mentioned above, it is possible to install a shielding plate at the weft opening to prevent the weft strips ejected by the injection roll from entering the weft channel, or to remove them with a removal machine. Although these methods have been proposed and put into practice, they have the disadvantage that the ends of the latitudinal rays obstruct the latitudinal passage because they clog the front of the latspa mouth or fold up the latitudinal rays to form a bent state.

In order to solve these problems, the present applicant has previously proposed Utility Application No. 60-36599
There is a weave damage prevention device (No. 20224). This device prevents the next weft from ejecting into the weft even if a misfire occurs in the weft that is being continuously ejected at high speed. This is a weaving damage prevention device with a new structure that operates stably when applied to a method of preventing weaving scratches, in which a certain number of unexploded weft strips are weaved in from the beginning of the next cycle. A cutting blade having blades on both sides is installed at a position along the upper surface of the lower frame of the distribution plate of each weft strip to cut the weft strip fed to the injection roll position so as to be lowered by the operation of a solenoid. It reached a certain point.

<Problems to be solved by the invention> The above-mentioned device of the applicant's Jitsugan Sho (Publication of Utility Model Publication No. 2-20224) solves the problems of the prior art which the device aims to solve. Although this device has a new structure and has been improved upon, it was discovered that the blade of the cutting blade was easily damaged and needed to be replaced at a relatively early stage.

<Means for Solving the Problems> The present invention solves the above-mentioned difficulties, and its structure is such that each weft strip is fed to the injection roll position along the upper surface of the lower frame of the distribution plate 10. It is characterized in that a vertically movable rod 13 is provided above a position for pressing the weft strip, and cutting scissors 11 are provided at a position to cut the weft strip that has moved downward as the vertically movable lever 13 is lowered. be.

<Operation> The device as described above senses the presence of an unfired weft, and the vertical movement rod 13 descends to press downward the weft that is scheduled to be ejected next to the unfired weft, and the pressure is increased. Immediately before the cutting scissors 11, which are installed to cut the weft strip at the position where the weft strip is cut, are sent to the injection roll, approximately
Cut it short by about 10cm so that it does not reach the injection roll so that it does not eject into the weft direction. Thereafter, using a known method, such as a jacquard mechanism or a ratchet mechanism, only one cycle is left unexploded, and the weft is woven from the same type of weft as the unexploded weft.

<Examples> Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view of a fragmentary loom equipped with the weaving flaw prevention device of the present invention. FIG. 2 is an enlarged side view of the weft supply device showing how the cutting scissors are arranged, and FIG. 3 is a front view of the main part. FIG. 4 is a side view of a cutting scissor portion showing another embodiment.

In order to enable weaving using a plurality of different weft strips, the illustrated fragmentary loom is provided with a weft supply device 3 on the left and right sides of the loom main body 1, which enables selective weaving of weft strips 2a to 2d. ing. In order to select these weft strips, a plurality of selection cams 4 are provided on the main body of the device, and a cam rod 5 that swings by touching the cam rods and a selection rod 6 connected at a substantially right angle to the cam rods are used to supply the weft strips. The needle levers 8a to 8d provided at the bottom of the weft guide grooves 7a to 7d of the device 3 are operated, and the weft strips 2a to 2d are sent one by one to the injection roll 9 and then to the rattling opening 19 by the feed pawl 14. A conventionally known structure is used to send the information.

The present invention is a weaving damage prevention device installed in such a shearing loom, and the injection roll is installed at the center of the distribution plate 10 provided in the supply device 3 of each weft and along the lower frame of the distribution plate. The latitudinal strip 2a sent to the position
A vertically movable rod 13 is provided above 2d, and cutting scissors 11 are provided at a position to cut the weft that has moved downward due to the lowering of this vertically movable rod 13. It is characterized in that it is operated in a specific manner.

The operation of the vertical moving rod 13 can be mechanically connected to the cam rod 5 as shown in FIG.
As shown in the figure, it is due to the solenoid 12,
For this purpose, by using a publicly known empty puncture sensing mechanism (for example, Japanese Patent Publication No. 57-17986), which is not shown in the figure, even if the unfired signal obtained by the empty puncture sensing needle is detected, the camrod 5 The stopper 25 is activated, or this non-fire signal is sent to the control circuit and converted into an activation signal for the solenoid 12. As a result, as mentioned above, just before the weft strip scheduled to be injected next to the unexploded weft strip is sent to the injection roll by the feed pawl 14, about 10 cm of the part that contacts the injection roll is removed. It is guided so that it is caught between the scissor blades of cutting scissors 11, which will be explained below, and when the cutting scissors 11 close, it is cut and shortened to prevent it from being ejected into the weft direction.

In the cutting scissors 11 shown in FIGS. 1 and 2, the arm parts 20, 20 are connected to the rotation shafts 21, 21 of the feed claw 14, and the scissors blades are rotated regularly each time in conjunction with these rotations. It is installed to open and close. When the vertical movement lever 13 is lowered by the above-mentioned misfiring signal, the weft strip to be sent to the injection roll 9 is pushed downward by the feed claw 14, enters the opening of the cutting scissors 11 and is cut, and the weft strip to be sent to the injection roll 9 is cut. It is cut off at the front as shown in Figure 3.

The two feed claws 14, 14 are rotated by the rotation of the feed cam 15 located below the main body of the device, so that the two feed claws 14, 14 move toward the branch rod 16 at the central fulcrum.
and swings via the transmission rods 17 and 18 to send the weft strips in the direction of the injection roll 9. The side shape of the feed pawl 14 is divided into three sections, front and rear, as shown in FIG. 3, and the weft strips 2 are completely fed by these three feed pawls 14a to 14c. The cut end weft strip falls downward, and the remaining weft strips accumulate on the gutter of the weft strip supply device together with the original defective short weft strips. At this time, the control circuit counts the number of weft lines that stop ejection at the same time, and only one cycle of ejection is determined to be a failure. As for this non-explosion means, various conventionally known methods can be adopted.

Another example of the operating mechanism of the cutting scissors 11 shown in FIG.
Unlike the one that synchronizes with the movement of the feed claws 14, 14 as in the previous example, this type is operated by a solenoid 22, and utilizes the above-mentioned well-known empty puncture sensing mechanism to detect the error obtained with the empty puncture sensing needle. The generated signal is sent to the control circuit and converted into an activation signal for the solenoid 22, and the scissors blades are opened and closed by the opening/closing arms 23, 23 of the solenoid 22 connected to the arm parts 20, 20 of the cutting scissors 11. Rather than opening and closing all the time, the cutting scissors 11 operate only when necessary, that is, when empty pricking.

<Effects of the invention> As described above, the weaving damage prevention device of the fragmentary loom according to the present invention, when a weft misfire occurs, completely removes the next weft from the weft from the weft. This device solves a problem that has been strongly desired in the past, since it can be removed without causing secondary troubles such as clogging the front of the latspa or interfering with the latitudinal passage. This device completely prevents weaving damage, and also has the advantageous features of automatically repairing misfires without stopping the machine, and producing high-quality products with high efficiency. The cutting shears that cut the latitudinal strips to remove them from the latitudinal strips are more durable than the cutting blades whose blades are simply plate-shaped edges, and are economically advantageous because they require less maintenance. It is something.

[Brief explanation of drawings]

FIG. 1 is a side view of a fragmentary loom equipped with the weaving flaw prevention device of the present invention. FIG. 2 is an enlarged side view of the weft supply device showing how the cutting scissors are arranged, and FIG. 3 is a front view of the main part. FIG. 4 is a side view showing another example of the cutting scissors portion. 3... Weft supply device, 9... Injection roll, 10
... Distribution plate, 11 ... Cutting scissors, 12, 22 ... Solenoid, 13 ... Vertical movement rod, 20 ... Arm portion of cutting scissors, 21 ... Rotating shaft of feed claw, 23 ... Opening/closing arm.

Claims (1)

[Scope of utility model registration request] In a fragment loom that weaves using two or more different weft strips, the vertically movable rod 13 is moved above the position where the weft strips are pressed along the upper surface of the lower frame of the distribution plate 10 of each weft strip to the injection roll position. Provided with the vertically movable rod 1
3. A weaving flaw prevention device for a fragmentary loom, characterized in that cutting scissors 11 are provided at a position for cutting the weft strips that have moved downward as a result of the lowering of the weave.