JPH0345985Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a device for drawing warp threads through gaps between reed blades as a preparation process for weaving work in an automatic loom, and in particular, the invention relates to a device for drawing warp threads through gaps between reed blades, and in particular, for drawing warp threads through air currents. This invention relates to a pneumatic reed drawing device.

Problems to be solved by conventional techniques and ideas Conventionally, as disclosed in Japanese Patent Publication No. 57-23020, a nozzle for ejecting pressurized air is made to correspond to the gap between the reed blades, and the airflow causes A pneumatic reed drawing device is known in which the end of the nozzle sucked in from the rear end is blown out from the tip, passed through the gap between the reed blades, and then a door on the side of the nozzle is opened to allow the middle of the warp to escape to the outside. However, with this conventional device, it is necessary to open the nozzle door and release the middle of the warp threads to the outside, which requires a door opening/closing device, which not only complicates the structure, but also takes time to open and close the door. Furthermore, since the door is closed when the warp is fed, if the end of the warp is sucked in from the side, if the warp is stiff, it may end up arching to the suction port. In order to avoid this, it is necessary to insert the warp threads from their tips into the suction port, which has the disadvantage of reducing work efficiency.

Purpose of the invention As described above, the reason why the conventional pneumatic reed drawing device has a door at the relief port on the side of the nozzle is that when the air inside the nozzle flows out from the relief port, the tips of the warp threads also escape. This is because it was emitted from the mouth and could not pass through the gaps between the reed feathers.
To provide a pneumatic reed drawing device capable of passing the ends of warp threads between the reed blades without providing a door at a relief port.

Structure of the invention As a means to achieve the above object, the present invention has a narrow vertical slit groove on the front surface of the nozzle body, the depth of which from the front surface is approximately constant from the top of the side surface or from the top surface to the bottom surface. By forming a yarn supply port on the upper side or top surface, a yarn blowout port on the bottom surface, and a yarn escape port on the front surface, the slit groove is inserted downward into the nozzle body. A nozzle having a slit-shaped air blowing hole that blows compressed air in a substantially parallel flow to generate an air flow from the yarn supply port to the yarn outlet by ejector action is moved in the parallel direction of the reed blades on the upper surface of the reed. In a state where the yarn outlet is aligned with the gap between the reeds, the ends of the warp fed to the yarn supply port are blown out from the yarn outlet and passed through the gap, and the middle of the warp is The thread is released from the nozzle through the thread release port.

Functions and Effects of the Invention The present invention has the above-mentioned configuration, and the depth from the front surface of the slit groove connecting between the yarn supply port and the yarn outlet of the nozzle body is approximately constant, and the air jet hole is provided in the slit groove. Since the pressurized air is blown downward in a substantially parallel flow from the slit groove, the airflow flowing from the yarn supply port to the yarn outlet in the slit groove becomes a substantially straight laminar flow due to the ejector action, and the air flows through the yarn outlet at the front surface. Since the amount of flow out from the thread supply port is extremely small, the ends of the warp threads supplied to the thread supply port do not escape from the thread release port, and are blown out from the thread blowing port and passed through the gaps between the reed feathers, and then the warp threads are The middle of the thread escapes from the thread release port and the reed threading is completed, and since there is no door in the release port, the structure is simple, the cycle time is short, and work efficiency is high. Even when the warp threads are sucked in from the thread outlet, the tips are sucked into the slit groove while the middle part of the warp threads enter the thread release port, and the threads are blown out through the inner end from the thread outlet into the gap between the reed feathers. It has the effect of being able to be drawn through.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

In the figure, reference numeral 1 denotes a nozzle for blowing and drawing the ends of the warp threads c into the gaps between the reed blades b of the reed a. The nozzle 1 moves in the parallel direction of the reeds b at a constant pitch corresponding to each gap between the reed blades b. A narrow vertical slit groove 5 is formed on the front surface of the block-shaped nozzle body 2, which extends from the bottom of the thread introduction part 3 to the bottom surface of the nozzle body 2, and has a depth from the front surface of the nozzle body 2. The upper end of the slit groove 5, which is formed uniformly and opens into the thread introduction part 3, is the thread supply port 6.
The opening at the bottom is the thread outlet 7, and the opening at the front is connected to the protrusion 8 on one side, as shown in FIG.
By protruding a, it becomes a narrower thread escape port 8 through which one or two warp threads c can pass. A narrow ejection hole 10 having a depth spanning the area from the position entered inside to the inner end is formed and communicates with the upper end of the slit groove 5, and this ejection hole 10 is formed at the inner end of the upper end. The communication hole 10a communicates with the air supply hole 11 formed in the nozzle body 2, and
An auxiliary jet hole 13 for blowing air into the gap between the reed blades b to widen the gap is formed at a rear position of the slit groove 5 in the nozzle body 2 and communicates with the air supply hole 11 described above.

Further, on the lower surface of the reed a, a thread suction device 15 for suctioning the ends of the warp threads c to the lower surface side of the reed a is installed such that it moves along a guide 16 integrally with the nozzle 1 described above. This thread suction device 15 is
A suction hole 18 is formed on the upper surface of the main body 17, extending over the front half of the reed a, aligned with the gap between the reed blades b, and gradually becoming narrower and wider toward the lower end. The interior of the suction hole 18 is tilted to negative pressure by blowing air into the air circulation holes 19 which are connected in a manner that they intersect with each other.
A shield 20 is attached at a position below the auxiliary ejection hole 13 to close the lower surface of the gap between the reed blades b.

Next, the operation of this embodiment will be explained.

Yarn outlet 7 and auxiliary outlet 13 of nozzle 1,
In addition, when the suction hole 18 of the thread suction device 15 is aligned with the gap between the adjacent reed blades b of the reed a,
When pressurized air is supplied to the air supply hole 11 of the nozzle 1, the pressurized air is ejected from the communication hole 10a at the upper end of the ejection hole 10, and a substantially straight laminar air flow flows through the ejection hole 10. Pressurized air is blown downward as a parallel flow mainly in the area on the back end side of the slit groove 5, and due to the ejector action, air is blown from the yarn supply port 6 of the slit groove 5 toward the yarn outlet 7 mainly on the back end side. As the air flows in a straight laminar flow, the air blown into the gap between the reed blades b from the auxiliary jet holes 13 hits the shielding body 20, thereby widening the gap between the reed blades b. When pressurized air flows through the air circulation hole 19 of the suction device 15, the inside of the suction hole 18 is tilted to negative pressure, and in this state, the unwinding end of the warp yarn c wound around the reel 23 is picked by hand and pulled out. , when the air flow passes through the nozzle 1 and is applied from the introduction part 3 to the yarn supply port 6 of the slit groove 5, the air flow flowing through the slit groove 5 from the yarn supply port 6 to the yarn outlet 7 is mainly Since the flow becomes a substantially straight laminar flow on the back end side, and the amount flowing out from the thread escape port 8 on the front side is very small, the warp threads c enter the thread release port 8 in the middle while the unwinding end is slit. The yarn is sucked into the groove 5 and blown out from the yarn outlet 7 into the gap between the reed blades b. At the same time, the yarn is sucked into the suction hole 18 tilted by the negative pressure of the yarn suction device 15, so that it passes along the middle of the warp yarn c. While letting the thread escape out of the nozzle 1 through the thread escape port 8, the unreeled end is drawn through the gap between the reed blades b, and at the same time, the warp thread c is drawn toward the front end side of the gap.

As described above, in this embodiment, the air flow mainly flows toward the rear end of the slit groove 5, and the width of the thread escape port 8 is narrowed, so even though the thread release port 8 is not provided with a door. However, the unwinding end of the warp thread c is blown out from the yarn outlet 7 without escaping from the thread escape opening 8. Especially, in the case of a stiff warp thread c, the part of the warp thread c may be unwound while entering the yarn escape opening 8. The ends pass through the inner end of the slit groove 5 and are blown out from the yarn outlet 7, and the warp yarns c are pulled across the upper edge of the door and the edge of the yarn supply opening, as in the case where a door is provided. There is no risk of a situation where suction is not possible due to getting caught.

Furthermore, in this embodiment, the thread suction device 15 is provided on the lower surface side of the reed a to suck the unwinding ends of the warp threads c, so that the warp threads c can be drawn in more reliably. Warp c to one end side of gap between wings b
It is also possible to carry out a pulling operation at the same time.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a partial longitudinal sectional view thereof, FIG. 3 is a sectional view taken along line AA of FIG. 1, and FIG. 4 is a perspective view thereof. a... Reed, b... Reed feather, c... Warp, 1... Nozzle, 2... Nozzle body, 5... Slit groove, 6
... Yarn supply port, 7 ... Yarn outlet, 8 ... Yarn escape port, 10 ... Spout nozzle, 15 ... Yarn suction device, 18
...Suction hole.

Claims (1)

[Claims for Utility Model Registration] 1. By forming narrow vertical slit grooves on the front surface of the nozzle body with a substantially constant depth from the front surface from the top of the side surface or from the top surface to the bottom surface, A yarn supply port is formed on the top surface, a yarn blowout port is formed on the bottom surface, and a yarn escape port is formed on the front surface, and pressurized air is blown downward into the slit groove into the nozzle body as a substantially parallel flow. A nozzle having a slit-shaped air blowing hole that generates an air flow from the yarn supply port to the yarn outlet by an ejector action is disposed on the upper surface of the reed so as to be movable in the parallel direction of the reed blades, and the With the blowout port aligned with the gap between the reed blades, the ends of the warp yarns supplied to the yarn supply port are blown out from the yarn blowout port and passed through the gap, and the middle of the warp threads are passed from the yarn relief port to the outside of the nozzle. A pneumatic reed drawing device characterized by having a configuration in which the reed is released into the air. 2. A yarn suction device having a narrow suction hole that aligns with the gap between the reed blades and suctions the ends of the warp yarns with negative pressure is arranged on the lower surface of the reed so as to move integrally with the nozzle. A pneumatic reed drawing device according to claim 1 of the utility model registration claim, characterized in that: