JPS59216951A - Weft yarn draw-passing apparatus of drum type weft yarn storing apparatus - 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 Field of the Invention The present invention relates to a weft thread pulling device for setting weft threads in a drum-type weft storage device of a loom.

<Prior art> Conventionally, for example, JP-A-57. As shown in Japanese Patent No. 39360, the weft thread is drawn from one end surface of the rotating shaft into a shaft hole formed in the shaft core, and is pulled out from the outlet on the outer peripheral surface of the intermediate portion of the rotating shaft. In a drum-type weft storage device in which the weft is wound around a drum supported at the end and stored, it is necessary to pull the weft through a shaft hole when cutting the weft. For this reason, in the device described in the same publication, an air injection nozzle for drawing the weft thread is provided opposite to the entrance of the shaft hole, and it is extremely easy to draw the weft thread along with the air flow. The weft can be pulled through.

However, in order to create such an air flow for drawing the weft threads, a pressure higher than a predetermined value is required, and in looms that use high-pressure air, such as air-injection looms, it is easy to use high-pressure air. However, for looms that do not use high-pressure air, such as water-jet looms, there is a problem in that a high-pressure air generator and piping must be newly installed.

<Purpose of the Invention> In view of these problems, the present invention aims to generate pressurized air for weft thread pulling without using a special high-pressure air supply source, thereby making it possible to pull the weft thread through. With the goal.

(Objective of the Invention) For this reason, the present invention utilizes the air discharged from a blower provided in a loom, but the air discharged from the blower has a large amount of air but has a low pressure, so it cannot be used as is. , the flow rate on the discharge side of the blower is regulated and the pressure on the discharge side is increased during use.

Specifically, a thread guide tube is inserted into the entrance of the shaft hole of the rotating shaft, and air is introduced between the outer circumferential surface of the tip of the thread guide tube and the inner circumferential surface of the shaft hole in the weft drawing direction. A valve device is provided in the middle of a pipe that forms an air outlet and connects the outlet of the blower and the air outlet.

<Example> Examples will be described below.

Fig. 1 shows an outline of a water jet loom, in which 1 is a warp beam, 2 is a warp, 3 is a bank roller, 4 is a heddle, and 5 is a reed. A weft yarn 8 stored in a weft storage device (to be described later) is inserted together with water jet from an insertion nozzle 7, and the weft yarn 8 is beaten onto a cloth front 9 by a reed 5 to weave a woven fabric 10. The woven fabric 10 is then pulled by a weaving density adjusting device 12 through a dewatering tube 11 and wound around a cross roller 13.

Here, the dehydration cylinder 11 has a slit 14 and communicates with a suction port 17 of a blower 16 via a steam/water separator 15. Therefore, when the blower 16 sucks air through the slit 14, it sucks the moisture contained in the woven fabric 1o together with the air, thereby dehydrating the woven fabric 10.

18 is a discharge port of the blower.

Next, the weft storage device 20 will be explained with reference to FIGS. 2 and 3.

Bolt 2 is attached to bracket 21 fixed to the frame of the loom.
2 fixes the housing 23, and this housing 2
A rotary shaft 25 is rotatably supported at 3 via a bearing 24. A gear 26 is fixed in the middle of the rotating shaft 25, and the rotating shaft 25 is rotated from the main shaft of the loom at a predetermined transmission ratio. Further, a handle 28 for manual rotation is fixed to the rear end of the rotating shaft 25 by a NAND 27.

A drum support 30 is attached to the tip of the rotating shaft 25 via a bearing 29 so as to be relatively rotatable, and a drum 32 is fixed to the drum support 30 by a port 31. A permanent magnet 33 is embedded in a part of the drum 32. A permanent magnet 35 is attached to a stay 34 projecting from the bracket 21, and these magnets 33. ．． 35 keeps the drum 32 stationary. The outer peripheral surface of the drum 32 has a tapered portion 36 that tapers from the rear end side and a straight portion 37 that is connected to the tapered portion 36.
is formed. However, the straight portion 37 is also slightly tapered. Further, holes 38 and 39 are formed on the outer circumferential surface of the drum 32 near the boundary between the tapered part 36 and the straight part 37 and near the tip of the straight part 37, and these holes 38 and 39 are respectively engaged at predetermined timings. Stop pins 40 and 41 move in and out.

An arm 42 is wound around the center of the rotating shaft 32 in a direction perpendicular thereto.
is attached and fixed with a nut 43, and a guide 44 is provided at the tip of the wrapping arm 42.

A fiber guide tube 46 is inserted into the shaft hole 45 of the rotating shaft 25 from the rear end side and fixed with an adhesive or the like. Tube 46
A thread guiding hole 47 is formed in the shaft center of the shaft, and the outer circumferential surface of the distal end portion is tapered (48). Further, the shaft hole 45 is connected to the rotating shaft 2.
It communicates with an outlet 50 with a guide 49 that opens on the outer circumferential surface of 5.

At this point, the weft yarn 8 is passed through the guide hole 47 of the guide pipe 46 to the shaft hole 45 of the rotating shaft 25, pulled out through the outlet 50, passed through the guide 44 of the winding arm 42, and then placed on the drum 32. After being locked with the locking pin 40 or the locking pin 41, it is passed through the weft insertion nozzle 7, and the rotation of the rotating shaft 25 causes the wrapping arm 42 to rotate around the drum 32 held stationary. As a result, the weft yarn 8 is wound around the drum 32 and stored, and is pulled out and inserted by the weft insertion nozzle 7 at the weft insertion timing. 51 is a cover for regulating ballooning.

The weft drawing device includes an air jet port 5 between the outer circumferential surface of the tapered part 47 of the yarn guide tube 46 and the inner circumferential surface of the shaft hole 45 of the rotating shaft 25.
2, and a rotating shaft 2 is attached to the rear part of this air outlet 52.
One end of the air guide hole 53 bored in the hole 5 is exposed. The other end of the air guide hole 53 faces an air chamber 56 formed around the rotating shaft 25 by a cover 54 and a gasket 55. Then, the nipple 57 is shortened to the cover 54,
One end of a pipe 58 is connected and fixed to this nipple 57. On the other hand, referring to FIG. 4, a manual on-off valve 59 is provided at the discharge port 18 of the blower 16, and a branch pipe 6 is installed from the side wall upstream of the on-off valve 59 in a direction perpendicular to the discharge direction.
o is provided. Then, the other end of the pipe 58 is connected and fixed to the branch pipe 60.

The reason why the branch pipe 60 is provided at right angles is to prevent almost any air from flowing toward the branch pipe 60 when the on-off valve 59 is opened.

The on-off valve 59 is constructed as shown in FIG. 5 IA1. That is, a valve body insertion hole 63 is formed in the frame body 61 and is perpendicular to an air passage 62 that connects to the discharge port 18 of the blower 16. It can be inserted freely. A through hole 66 facing the air passage 62 is formed in the valve body 64 .

A compression spring 68 is interposed between a spring retainer 67 fixed to one end of the valve body 64 and the frame body 61, so that the valve body 64 is held at a predetermined position. A handle 6 for rotational operation is provided at the other end of the valve body 64.
9 is provided. Therefore, by operating the handle 69 and rotating the valve body 64 so that the through hole 66 is in the same direction as the air passage 62 as shown in FIG. 5 IBI, the valve can be opened. By making the through hole 66 perpendicular to the air passage 62 as shown in FIG. 5(C), the valve can be brought into a closed state.

Further, in FIG. 4, 70 is a limit switch, which is fixed to the casing of the blower 16 via a stay 71, and is closed when the handle 69 is operated to the fully closed position of the on-off valve 59. There is. However, it is not necessarily closed only in the fully closed position, but may be closed in a partially open position as long as a predetermined pressure air can be obtained to the branch pipe 60 side.

This limit switch 70 is incorporated into the circuit shown in FIG.

To explain the circuit shown in FIG. 6, a series circuit of an auxiliary equipment starting switch 72 and a relay 73 is connected to the power source via a normally closed contact 84b of a relay 84, which will be described later. It is inserted into the power supply circuit 75 of the drive motor 74. Further, a relay 76 is connected in parallel with the relay 73, and a contact 76 of this relay 76
a is inserted into the power supply circuit 78 of the left and right heat cutters 77. In addition, in parallel with the auxiliary equipment starting switch 72,
A series circuit of the normally closed stop switch 79 and the self-holding contact 73b of the relay 73 is connected. Also, relay 7
A series circuit of a loom starting switch 8o and a relay 81 is connected in parallel with 3 and 76, and the contact 8 of this relay 81
1a is inserted into a power supply circuit 83 of a loom driving motor 82. Further, a self-holding contact 81b of a relay 81 is connected in parallel with the loom starting switch 80.

Further, a series circuit of a limit switch 7o and a relay 84 is connected to the power supply, and a contact 84a of this relay 84 is connected to a power supply circuit 85 provided in parallel with a power supply circuit 75 having a contact 73a for the loom drive motor 82. It is inserted.

Next, the effect will be explained.

First, the normal starting operation of a loom will be explained.

Normally, the on-off valve 59 is operated to the fully open position and the limit switch 70 is in the open state, so the relay 84 is inactive and the contact 84b is in the closed state.

When the auxiliary equipment starting switch 72 is closed in this state,
Relays 73 and 76 are energized, self-holding contact 73b is closed and self-holding is performed, and contacts 73a and 76 are energized.
6a is closed, and the blower drive motor 74 and heat cutter 77 are activated.

Next, when the loom starting switch 80 is closed, the relay 81 is energized, the self-holding contact Blb is closed and self-holding is performed, and the contact 81a is closed and the loom driving motor 82 is operated.

If the stop switch 79 is opened, the relay? 3.76°81 self-holding is released and the loom and auxiliary equipment stop.

Prior to the above-mentioned starting operation, the weft 8 is stored in the weft storage device 20.
When opening, first rotate the handle 69 of the on-off valve 59 counterclockwise as shown in Figure 4 until it is in the fully closed position (Figure 5 (C)).
). This closes the limit switch 70, energizes the relay 84, opens the contact 84b, and closes the contact 84a, causing the blower drive motor 74 to operate.

As a result, the blower 16 operates and discharges the air sucked in from the slit 14 of the dehydration cylinder 11 to the discharge port 18 side, but since it is closed by the on-off valve 59, it is discharged to the branch pipe 60 side, and the air is discharged to the pipe 58 side. and into the air chamber 56 via the nipple 57. Then, the air reaches the air outlet 52 from the air chamber 56 through the air guide hole 53, is ejected from the air outlet 52, and flows inside the shaft hole 45 toward its tip. Here, since the cross-sectional area of the air jet port 52 is extremely small relative to the discharge flow rate of the blower 16, the flow rate is converted into a pressure head, producing a high-speed airflow flowing from the shaft hole 45 to the outlet 50. This airflow generates a negative pressure airflow toward the tip in the thread guide tube 46, so when the tip of the weft yarn 8 is brought to the rear end of the thread guide tube 46, that is, the entrance of the thread guide tube 47, the air flow causes It gets sucked in. Besides, when it comes out of the thread guide tube 47,
It is blown away by the high-speed airflow in the shaft hole 45 and flies out from the outlet 50, completing the drawing of the weft yarn 8.

Even if you accidentally close the auxiliary equipment start switch 72 and the loom start switch 80 during this process, the contact 84b remains open, so the heat cutter 77 and the loom drive motor 8
2 does not operate, and the loom can be started by returning the on-off valve 59 to the fully open position. Therefore, there is no fear of forgetting to operate the on-off valve 59.

According to experiments, a friction blower of 400 W and a discharge flow rate of 1.6♂/min was used as the blower 16, and the total cross-sectional area of the slit 14 was set to 52.5.4. When the cross-sectional area of the air outlet 52 is 0.133 eTa, the blower discharge side pressure is 200 mm/A when the on-off valve 59 is fully open.
q, while when fully open, 600mm/A
q, and it was confirmed that it was fully usable.

In addition to the above-mentioned on-off valve 59, a switching valve 90 as shown in FIG. 7 may be used as the valve device. This switching valve 90
A 7-shaped passage 92 is formed in a rotatable cylindrical valve body 91, and the discharge port 18 of the blower 16 is connected to the atmosphere opening port 9.
3 or the air passage 94 on the drawing device side. Of course, during normal operation, Fig. 7A
The discharge port 18 is connected to the atmosphere opening port 93 as shown in FIG. 1, and at the time of drawing, the discharge port 18 is connected to the drawing-side air passage B94 as shown in FIG. 7 IBI. The above-mentioned pipe 58 is connected to this air passage 94. In this case as well, it is desirable to prevent the loom from starting when the state is switched to the state shown in FIG. 7 (Bl).

<Effects of the Invention> As explained above, according to the present invention, an air flow of sufficient pressure for drawing the weft can be generated by the blower provided in the loom without using a special high-pressure air supply source. This provides the effect that the weft can be pulled through.

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a side view of the entire loom, FIG. 2 is a front sectional view of the weft storage device,
Figure 3 is a plan view of the same as above, Figure 4 is a schematic diagram of the air path for drawing the weft, Figure 5 (~ is a sectional view of the opening/closing valve, Figure 5+B
), icl is a sectional view of AJ in the same figure according to the operating state, and FIG. 6 is a circuit diagram of the drive circuit of the loom.
Figure m+, (B) is a sectional view of the switching valve according to the operating state showing another embodiment. 8... Weft 11... Dewatering tube 16... Air blower 18... Discharge port 20... Weft storage device 2
5... Rotating shaft 32... Drum 42... Wrapping arm 45... Shaft hole 46... Yarn guide tube 50...
・Outlet port 52...Air outlet 56...Air chamber
58...Pipe 59...Opening/closing valve 69...Handle 70...Limit switch 74...
Blower drive motor 90...Switching valve patent applicant
Fujio Sasashima, Patent Attorney, Nissan Motor Co., Ltd. Figure 5 (B) Figure 7 (B)

Claims (1)

[Claims] The weft (8) is passed from one end surface of the rotating shaft (25) through the shaft hole (45) formed in the shaft core portion thereof, and is pulled out from the outlet (50) on the outer peripheral surface of the intermediate portion of the rotating shaft (25). Rotating shaft (25
) In a drum-type weft storage device that stores yarn by winding it around a drum (32) supported at the other end, a yarn guide tube (46) is inserted into the entrance of the shaft hole (45), An air jet port (52) for jetting air in the weft (8) drawing direction is formed between the outer circumferential surface of the tip of the yarn guide tube (46) and the inner peripheral surface of the shaft hole (45). , a drum-type weft storage characterized in that a valve fi (59, 90) is provided in the middle of a pipe (58) connecting the discharge port (18) of the blower (16) and the air jet port (52). Weft thread drawing device of the device.