JP2002235261A - Weft-insertion pump for water-jet loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the weft-insertion and prevent the lowering of the quality of woven fabric by suppressing the pulsation of the pressure of water jet a weft-insertion pump 1 of a water-jet loom. SOLUTION: A plunger 17 is displaced against the elastic forces of springs 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, and 34 in the suction stroke of the plunger 17 to store the energy in the springs 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, and 34, the ejection stroke of the plunger 17 is carried out by the energy stored in the springs 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, and 34 and the water jet is supplied to the weft-insertion nozzle 2. In this weft-insertion pump 1 of a water- jet loom having the above action, the springs 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, and 34 are composed as plural springs having different characteristic frequencies to suppress the pulsation of the pressure of the water jet by suppressing the resonance of the oscillation of the springs 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, and 34 with the pressure variation of the water jet and the vibration of the pump driving system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a weft insertion pump device of a water injection loom for supplying injection water to a weft insertion nozzle.

[0002]

2. Description of the Related Art A weft insertion pump device of a water injection loom is
Japanese Utility Model Publication No. 7-26381 and JP-A-10-29964.
No. 3, as disclosed in Japanese Unexamined Patent Publication No. 3 (1993), this is a kind of plunger pump, and stores a spring in a plunger suction process.
At the subsequent weft insertion, the spring in the cylinder is released by releasing the spring that has been charged, the water in the cylinder is pressurized by the movement of the plunger, the pressurized water is sent to the weft insertion nozzle, and the jetted water is jetted from the weft insertion nozzle. I do.

[0003]

In the conventional weft insertion pump device, the spring has a certain natural frequency. For this reason, when the vibration of the spring during the operation of the plunger and the fluctuation of the pressure of the jet water resonate, the spring vibrates very vigorously, generating a large pressure pulsation in the jet water, which destabilizes the weft insertion, and consequently, The quality of the woven fabric is reduced.

Accordingly, an object of the present invention is to stabilize the weft insertion by suppressing the pressure pulsation of the injection water in the weft insertion pump device of the water injection loom, thereby preventing the quality of the woven fabric from being deteriorated. .

[0005]

SUMMARY OF THE INVENTION In view of the above, according to the present invention, in a weft insertion pump device of a water jet loom, a spring is configured to act as a plurality of springs having different natural frequencies. This suppresses the resonance between the vibration of the spring and the pressure fluctuation of the jet water and the vibration of the pump drive system, and reduces the pressure pulsation of the jet water.

Specifically, in the claims,
In the weft insertion pump device for a water jet loom of the first aspect, in the plunger suction process, the plunger is displaced against the elasticity of the spring to accumulate the spring, and the accumulated spring discharges the plunger. Performing the process, in a weft insertion pump device of a water injection loom that supplies injection water to the weft insertion nozzle, the spring is configured to act as a plurality of springs having different natural frequencies from each other, and the vibration of the spring The resonance with the fluctuation of the pressure of the jet water and the vibration of the pump drive system is suppressed, and the pressure pulsation of the jet water is reduced.

According to a second aspect of the present invention, the weft insertion pump device for a water jet loom according to the second aspect has separate springs on both sides of a flange portion of a spring receiver fixed to a plunger. The spring is configured to operate.

[0008]

FIG. 1 shows a weft insertion pump device 1 of a water jet loom according to the present invention and a drive system thereof.
In FIG. 1, a weft insertion pump device 1 of a water jet loom is interposed in a path of a pipe 3 to a weft insertion nozzle 2, sucks water 4 in a suction step, and discharges water of a predetermined pressure in a subsequent discharge step. 4 is supplied to the weft insertion nozzle 2 as jet water, whereby the weft Y is inserted.

The weft insertion pump device 1 of the water jet loom comprises a cam lever 8 having a D-shaped cam 6 and a cam follower 8a interlocking with the main shaft 5 of the water jet loom and having a lever shaft 7 as a swing center. , Cam lever 8 and weft insertion pump device 1
The connection rod 10 is connected to the ball joint 9 and the connection pins 11 at both ends thereof. The swing angle of the cam lever 8 is regulated by an adjusting stopper screw 8b in order to adjust a stroke of a plunger 17 described later.

Next, FIG. 2 shows an internal structure of the weft insertion pump device 1 of the water jet loom of the present invention. In FIG.
The pump device 1 for weft insertion of a water jet loom comprises a housing 1
In the second flow path 13, check valves 14 and 15 are provided on the suction side and the discharge side, and are interposed in the path of the pipe 3 with the check valves 14 and 15 incorporated therein. The housing 12 is integrated with the cylinder 16 by a fixing means such as a screw between the check valves 14 and 15, and has a plunger 17 inside the cylinder 16 in a state capable of reciprocating sliding movement with a predetermined stroke. . Of course, the inside of the cylinder 16 communicates with the flow path 13.

The plunger 17 is connected at its rear end to the ball joint 9 by fixing means such as a screw, and is integrated with a cylindrical spring receiver 18 by tightening the fixing means. The spring receiver 18 forms an annular flange 19 on the front end side of the plunger 17. This collar 19
Is opposed to the spring receiving surface 21 at the inner bottom of the cup-shaped spring case 20. The cup-shaped spring case 20 is attached to the housing 12 by screws 22 and is prevented from rotating by a lock nut 23 at an appropriate position.

The present invention relates to a pump device 1 for weft insertion of a water jet loom.
9 and a spring receiving surface 21 on the inner bottom of the cup-shaped spring case 20, a plurality of, for example, two coil-shaped springs 24, 25 having different natural frequencies are pivoted about the center in the sliding direction of the plunger 17. The springs 24 and 25 are configured so as to function as a plurality of springs having different natural frequencies from each other.

During operation of the weft insertion pump device 1 of the water jet loom, the cam 4 rotates the cam lever 8 to retract the plunger 17 in the suction process, thereby sucking the water 4 into the cylinder portion 16 and The two springs 24 and 25 are charged, and the stored springs 24 and 25 are rapidly released in the subsequent discharge process. At this time, the plunger 17 moves forward by the repulsive force of the two springs 24 and 25, and pressurizes the water 4 inside the cylinder portion 16 while supplying water of a predetermined pressure to the weft insertion nozzle 2 as jet water for weft insertion. Supply 4.

Cylinder 1 due to advance of plunger 17
At the time of pressurizing operation on the water 4 in the two
4 or 25, for example, the elastic frequency of the spring 24 matches the frequency of the pressure fluctuation of the jet water (water 4) at the time of weft insertion, and even if they attempt to resonate, the natural frequency differs. Since the other spring 25 prevents the spring 24 from vibrating, the conventional resonance phenomenon is suppressed.

As described above, the two springs 24 and 25 having different natural frequencies allow the elastic frequency of the springs 24 and 25 and the pressure fluctuation of the injection water and the frequency of the pump drive system such as the cam 6 and the cam lever 8 to be controlled. Can be avoided, and excessive elastic vibrations of the springs 24 and 25 due to pressure fluctuation of the injection water and resonance with vibration of the pump drive system can be suppressed. For this reason, excessive pressure fluctuation of the injection water can be suppressed, and pressure pulsation of the injection water due to a so-called surging phenomenon can be suppressed.

Further, since the pressure pulsation of the jet water is suppressed, it is possible to prevent the quality of the woven fabric from being deteriorated. Further, a large-capacity spring force can be obtained in the limited space at present, which can contribute to space saving.

FIGS. 3 to 7 show another example of the weft insertion pump device 1 of the water jet loom.

First, in the weft insertion pump device 1 of the water jet loom shown in FIG. 3, a plurality of, for example, two springs 26 and 27 having different natural frequencies are provided in series in the sliding direction of the plunger 17. . With this configuration, the same operation and effect as those of the weft insertion pump device 1 of the water jet loom of FIG. 2 can be obtained.

In the weft insertion pump device 1 of the water jet loom shown in FIG. 4, the structure shown in FIG. 2 and the structure shown in FIG. 3 are combined to form two springs 28 and 29 having different natural frequencies and a natural frequency. Are provided in series with respect to the sliding direction of the plunger 17, and further, the springs 30, 3 in series with the series springs 28, 29 are provided.
And 1 are incorporated in parallel. With this structure, the operation and effect of the configuration of FIG. 2 and the operation and effect of FIG. 3 are simultaneously obtained, and the resonance phenomenon at more resonance points is suppressed.

Further, in the weft insertion pump device 1 of the water jet loom of FIG. 5, at least one spring 32 is incorporated between the inner surface of the housing 12 and the spring receiving surface 21 of the spring case 20. An intermediate portion of the spring 32 is passed through the insertion hole 19a of the flange 19 of the spring receiver 18, and is held and fixed at the position of the hole 19a. According to this example, the spring 3
2 is one, but the springs 32 of each part located on both sides of the flange 19 act independently as two springs having different natural frequencies. Then, by changing the fixing position of the spring 32 with respect to the flange 19, the effective number of turns of each spring 32 on both sides of the flange 19 can be changed, and the spring constant can be changed.

Incidentally, in the example of FIG.
2, two or three or more springs are provided concentrically around the center in the sliding direction of the plunger 17, and a part of the springs is formed as a flange. Alternatively, the spring 19 and the flange 19 of the spring receiver 18 may be integrally provided at the position of the hole 19a.

As shown in FIG.
Is not the hole 19a for insertion of the flange 19, but the flange 19 is interposed between the wires of the spring 32,
Can be engaged. The fixed or engaged position of the spring 32 with respect to the collar 19 of the spring receiver 18 can be adjusted as needed to select a natural frequency or to change the stroke of the plunger 17.

In the weft insertion pump device 1 of the water jet loom shown in FIG. 7, a spring 33 is incorporated between the inner surface of the housing 12 and the flange 19 of the spring receiver 18. A spring 34 is also incorporated between the spring receiving surface 21 and the flange 19 of the spring receiver 18. Here, the two springs 33 and 34 have different natural frequencies. In the example of FIG. 7, another spring may be provided concentrically in a double or multiple manner with respect to the springs 33 and 34.

In all of the above examples, each spring 24,
25, 26, 27, 28, 29, 30, 31, 32, 3
The springs 3 and 34 can be replaced with springs having different natural frequencies as needed in order to effectively suppress the resonance phenomenon.
By exchanging springs having different spring constants, a jet of water at a required pressure can be obtained.

[0025]

According to the first aspect of the present invention, even when the frequency of one of the springs coincides with the frequency of the pressure fluctuation of the injection water and attempts to resonate during the operation of the plunger, the other spring having a different natural frequency will be used. Acting to reduce the resonance, the conventional resonance phenomenon can be suppressed. Thereby, the fluctuation of the pressure of the jet water and the frequency of the pump drive system are avoided, and the excessive vibration of the spring due to the fluctuation of the pressure of the jet water and the resonance with the vibration of the pump drive system can be suppressed. For this reason, excessive pressure fluctuation of the injection water can be suppressed, and pressure pulsation of the injection water due to a so-called surging phenomenon can be suppressed. Further, by suppressing the pressure pulsation of the jet water, it is possible to prevent the quality of the woven fabric from being deteriorated. Further, a large-capacity spring force can be obtained in the current limited space, which can contribute to space saving.

According to the second aspect of the present invention, the spring is configured so as to act as separate springs on both sides of the spring receiving flange at the boundary, whereby the spring receiving flange inserted through the spring is formed. By changing the position of the part with respect to the sliding direction of the plunger, it is possible to change the effective number of turns of the springs on both sides of the flange. This changes the spring constant of each spring on both sides, so that the natural frequency of the spring can be easily adjusted without replacing the spring.

[Brief description of the drawings]

FIG. 1 is a weft insertion pump device 1 of a water jet loom of the present invention.
FIG. 2 is a side view of a driving system for the vehicle.

FIG. 2 is a weft insertion pump device 1 of the water injection loom of the present invention.
FIG.

FIG. 3 is a weft insertion pump device 1 of the water jet loom of the present invention.
It is sectional drawing of another example of (a).

FIG. 4 is a weft insertion pump device 1 of the water jet loom of the present invention.
It is sectional drawing of another example of (a).

FIG. 5 is a weft insertion pump device 1 of the water jet loom of the present invention.
It is sectional drawing of another example of (a).

FIG. 6 is a cross-sectional view of a main part in a state where the spring 32 is engaged with the spring receiver 18 halfway.

FIG. 7 is a weft insertion pump device 1 of the water jet loom of the present invention.
It is sectional drawing of another example of (a).

[Explanation of symbols]

 Reference Signs List 1 pumping device for weft insertion of water jet loom 2 weft insertion nozzle 3 pipe 4 water 5 main shaft 6 cam 7 lever shaft 8 cam lever 8a cam follower 8b stopper screw 9 ball joint 10 connecting rod 11 connecting pin 12 housing 13 flow path 14 check Valve 15 Check valve 16 Cylinder 17 Plunger 18 Spring receiver 19 Flange 19a Hole 20 Spring case 21 Spring receiving surface 22 Screw 23 Lock nut 24 Spring 25 Spring 26 Spring 27 Spring 28 Spring 29 Spring 30 Spring 31 Spring 32 Spring 33 Spring 34 spring

Claims (2)

[Claims] In a suction process of a plunger, a spring is stored by displacing the plunger against the elasticity of the spring, and a discharging process of the plunger is performed by the stored spring. A weft insertion pump device for a water injection loom, wherein the spring acts as a plurality of springs having different natural frequencies from each other. 2. The water injection according to claim 1, wherein the spring is configured so as to act as separate springs on both sides of the flange of the spring receiver fixed to the plunger. Pump device for weft insertion of a weaving machine.