JPH1025646A - Water removing device provided on machine in water jet loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at the sure removal of water content in a woven cloth by arranging a closed space communicating with an outside atmosphere through a partitioning member on a woven fabric transferring, while making a contact with a sucking port of a suction tube. SOLUTION: This water removing device provided on a machine in a water jet loom, is obtained by transferring a woven fabric F, while making a contact with a sucking port 3 of a suction tube 1, and also arranging a closed space H constituted by a partitioning member consisting of a flexible sheet 12, a combination of a frame body with a brush or a frame body having a fallen sideways U-shaped, etc., and the above woven fabric F, communicating with an outside atmosphere through air ventilating ports 18a, 18b having a smaller opening area than that of the above sucking port 3, on the woven fabric F and extending through the whole width of the woven fabric F for aiming at the effective water removal of the woven fabric F.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-machine dewatering apparatus for a water jet loom, and more particularly, to moving a woven fabric in contact with a suction port of a suction tube in a process of winding the woven fabric. This is an improvement in the technique for dewatering woven fabrics, and is particularly effective for low-density woven fabrics, coarse-density woven fabrics, double woven fabrics, and the like in which there is a relatively large space between yarns. In this specification, "upstream, downstream" refers to the direction of movement of the woven fabric with the progress of weaving.
Is used.

[0002]

2. Description of the Related Art When performing on-machine dewatering as described above, a woven fabric moves while contacting on a suction port of a suction tube. However, in the case of a low-density woven fabric such as gauze, for example, dehydration becomes insufficient.

That is, dehydration from a woven fabric is caused by the pressure (negative pressure) in a suction tube. However, if the density of the warp yarns constituting the woven fabric is low, a large amount of air easily flows into the suction tube from the thread of the woven fabric through the suction port. For this reason, the pressure in the suction tube does not become sufficiently low, and as a result, only air is sucked, and a sufficient suction force does not work for the moisture in the woven fabric.

Several proposals have already been made to obtain a sufficient negative pressure. That is, Japanese Patent Application Laid-Open No. 62-15634
In the technique described in No. 5, the low-permeability sheet is brought into full contact with the woven fabric around the suction port of the suction tube, and the air in the woven fabric accompanying the suction is introduced into the suction tube by this sheet. The movement of is suppressed. Further, in the technique described in Japanese Utility Model Application Laid-Open No. 5-66084, the air-impermeable sheet is similarly brought into full contact with the woven fabric or is partially brought into contact with the woven fabric by forming a large number of recesses in the sheet, thereby making the external air Is suppressed from entering the suction tube.

[0005]

All of these prior arts suppress the inflow of air into the suction tube, and thus have the effect of avoiding a decrease in negative pressure. However, there is a problem due to the fact that the low-permeability or air-impermeable sheet is adhered to the woven fabric.

[0006] Since the movement of air is blocked by the presence of the sheet and the air is closed, the accompanying movement of moisture accompanying the movement of air is also inhibited. That is, dehydration becomes insufficient. In addition, since the air inside the woven fabric is hard to move, the moisture in the woven fabric moves to the dry woven fabric portion on the downstream side due to capillary action. This phenomenon is counterproductive for the purpose of dehydration. Due to these factors, it is inevitable that the conventional technique of the type in which the sheet is closely adhered to the woven fabric as described above causes insufficient dewatering.

SUMMARY OF THE INVENTION In view of the above-mentioned state of the art, an object of the present invention is to provide a technique of dewatering a woven fabric by moving the woven fabric while making contact with a suction port of a suction tube. And perfection.

[0008]

Therefore, in the present invention, a closed space is defined on the woven fabric by the partition member and the woven fabric at the suction port portion of the suction tube, and a ventilation port having a smaller opening area than the suction port is formed. The gist of the present invention is that the closed space is communicated with the outside air through the air.

[0009]

The air flows into the suction tube from the ventilation port having a smaller opening area than the suction port through the suction port. Therefore, the amount of inflow of air is suppressed as compared with the conventional case where the outside air flows directly into the suction tube through the suction port, so that the pressure in the suction tube becomes lower and the suction force of the woven fabric against moisture increases. I do. In addition, since a closed space is formed on the woven fabric, the flow of air passing through the woven fabric is ensured and the air does not become closed, and moisture is effectively sucked into the suction tube together with the flow of air. You.

[0010]

1 to 4 show an example of a dewatering device according to the present invention. Since a flexible sheet is used as a partition member, the sheet has a low frictional resistance with a woven fabric. It is desirable to use a small material, for example, a synthetic resin such as Teflon (trade name) having a thickness of about 0.3 mm.

As shown in FIG. 1, a suction tube 1 for performing suction dehydration on a woven fabric F is in contact with the lower surface of the woven fabric F at a suction port 3 upstream of a guide roller 2. The suction port 3 has a slit shape formed over a range longer than the width of the woven fabric F, and the dewatering device 10 is pressed and arranged on the upper surface of the woven fabric F at this portion.

As shown in FIGS. 2 and 3, the frame body 11 extending in the width direction of the woven fabric is front and rear (in a direction intersecting the width direction of the woven fabric).
On both sides, the upper end of the flexible sheet 12 is fixed by a plurality of fastening screws 14 attached at equal intervals in the width direction of the woven fabric. The sheet 12 used is longer than the width of the woven fabric F to be woven. FIG. 2 shows the vicinity of the right end of the frame 11 when the partition member is viewed from the guide roll 2 toward the front of the weaving. At the time of fixing with the fastening screw 14, a spacer 14 is interposed between the sheet 12 and the side surface of the frame 11, and provides a second vent to a closed space described later. In the illustrated example, the frame 11 is appropriately connected to and supported by a frame (not shown) of a loom while being pressed downward by a pair of stays 15 (only one is shown in FIG. 2). However, instead of this, both ends of the frame 11 may be bound to the suction tube 1 by an appropriate band.

As shown in FIG. 3, the sheet 11 is a member having a substantially W-shaped cross section, and the lower portion thereof has a central upper convex portion 1.
2a and lower projections 12b on both sides thereof. A plurality of first ventilation holes 18a are formed in the upper convex portion 12a at regular intervals in the width direction of the woven fabric, and the lower convex portions 12b on both sides are a pair of left and right fixed to the lower surface of the frame 11. The shape is held by the moquette 16. Moquette 16
It is composed of a large number of fine hairs that are dense and extend in the vertical direction. The moquette 16 used is longer than the width of the woven fabric F to be woven. The aforementioned second ventilation port 18b is provided in the frame 1
1 is formed between both front and rear side surfaces and the seat 12.

In the illustrated example, the total opening area of the plurality of first vents 18a formed in the upper convex portion 12a of the sheet 12 is set smaller than that of the suction port 3 of the suction tube 1. . In addition, two second vents 18
The total opening area of b and 18b is also set smaller than that of the suction port 3. Furthermore, the space in the moquette 16 that allows the passage of air, that is, the space between adjacent hairs can be regarded as a vent, and the area of the vent is smaller than the opening area of the suction port 3.

With the above configuration, a kind of closed space H is defined between the central upper convex portion 12a of the sheet 12 and the woven fabric F. The closed space H extends over the entire width of the woven fabric F, and includes the first vent 18a moquette 16 and the second vent hole 18a.
Communicates with the outside air through the ventilation port 18b. At both hem portions of the closed space H, the seat 1 is
2, the lower convex portion 12b is elastically pressed tightly against the woven fabric F. As shown in FIG. 2, both ends of the closed space in the width direction are closed by closing members 17 made of sponge or the like. As the weaving proceeds, the woven fabric F moves in this close contact state. However, if the sheet 12 is formed from a material such as Teflon as described above, the frictional resistance is low. The structure of the cloth F is not disturbed.

Next, the operation will be described with reference to FIG. When the suction by the suction tube 1 is started, as shown by the arrow in the figure, the outside air flows from the second vent port 18b to the moquette 16.
At the same time, the air flows into the closed space H through the first ventilation port 18a, and at the same time, the air flows out of the closed space H into the suction tube 1 through the woven fabric F and the suction port 3. However, since there is a difference in the opening area as described above between the outside air vent to the closed space H and the suction port 3, there is a case where the outside air directly flows from the woven fabric F to the suction port 3 as in the related art. Compared to,
Since the amount of inflow of outside air decreases, the pressure in the closed space H becomes negative. Therefore, even if the woven fabric F has a coarse density, the inside of the closed space H is in a sufficiently negative pressure state.

Further, the flow velocity of the moving air becomes large due to the difference in the opening area. Suction tube 1 from closed space H
Upon moving in, the air passes across the intermediate woven fabric F. By passing the cloth F at a high speed in this manner, the air effectively moves the moisture in the cloth F.
In other words, it has an excellent dehydration effect.

The lower protruding portion 12b of the sheet 12 on the downstream side (right side in FIG. 4) is pressed against the woven fabric F by the moquette 16. Since the water in the woven fabric F is squeezed out into the closed space H by the pressing, the water is effectively prevented from being diffused to the dry woven fabric portion on the downstream side by the capillary phenomenon.

As described above, in the present invention, the opening area of the ventilation port is set smaller than that of the suction port 3 of the suction tube 1. However, the opening area and number of the first ventilation port 18a and the second ventilation port are set. The opening area of 18 b (that is, the thickness of the spacer) may be at least one smaller than the opening area of the suction port 3. The difference in the opening area at this time is appropriately set according to the required water suction force. In the above embodiment, if the outside air passage area of the moquette 16 is set to be smaller than the opening area of the suction port 3, the opening areas of the first ventilation port 18a and the second ventilation port 18b are respectively equal to the suction area. It may be set to be equal to or larger than the opening area of the mouth 3.

In the above embodiment, the flexible sheet 12 is used as the partition member. However, instead of this, as shown in the embodiment shown in FIG. May be attached. In this case, the space between the bristles constituting the brush group 22 serves as a vent.

As shown in FIG. 6, the frame 31 of the dewatering device 30 may be formed in a U-shaped cross section. That is, the side wall 32 extending downward is integrally formed at the front and rear ends of the frame body 31. A vent 33 is formed in the center of the main body 31 in the same manner as the first vent 18a.
It is desirable to apply a coating such as Teflon to the lower end of the substrate. In order to elastically press the side wall 32 against the woven fabric F, a stay supporting the frame body 31 may be provided with an appropriate spring element.

[0022]

According to the present invention, by sufficiently reducing the pressure inside the suction tube without causing a closed state, the flow velocity of the air is increased in a state where a sufficient suction force acts on the moisture of the woven fabric, and the weaving is performed at a high speed. Since the water passes through the cloth, the moisture in the woven cloth also moves. Together, these phenomena make dehydration reliable and complete.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing an arrangement state of a dehydrating apparatus of the present invention.

FIG. 2 is an exploded perspective view showing one embodiment of the dehydrating apparatus of the present invention.

FIG. 3 is a partially sectional side view of the same.

FIG. 4 is an enlarged partial cross-sectional side view showing the same operation.

FIG. 5 is a side view showing another embodiment of the dehydrating apparatus of the present invention.

FIG. 6 is a sectional side view showing still another embodiment of the dehydrating apparatus of the present invention.

[Explanation of symbols]

 1: Suction tube 2: Guide roller 3: Suction port F: Woven cloth H: Closed space 10, 20, 30: Dewatering device 11: Frame 12: Flexible sheet 16: Moquette 17: Sponge closed body 18a, 18b: Vent 22: Brush 33: Vent

Claims (4)

[Claims] 1. A type in which a woven fabric is dewatered by moving the woven fabric while being in contact with a suction port of a suction tube, wherein the woven fabric is placed on the woven fabric by a partition member and the woven fabric at a suction port portion of the suction tube. An on-machine dewatering device for a water jet loom, wherein a closed space is defined, and the closed space communicates with outside air through a vent having a smaller opening area than the suction port. 2. The apparatus according to claim 1, wherein said partition member is formed of a flexible sheet. 3. The apparatus according to claim 1, wherein said partition member is formed by a combination of a frame and a brush. 4. The apparatus according to claim 1, wherein said partition member is defined by a frame having a U-shaped cross section.