JP2907648B2 - Jet flow measuring method and jet flow measuring device for fluid jet loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet flow measuring method and a jet flow measuring device for measuring a pressure distribution, a jet direction or a fluid path characteristic of a fluid jetted from a fluid jet nozzle of a fluid jet loom.

[0002]

2. Description of the Related Art Conventionally, a method for measuring the fluid ejection direction and ejection performance of a nozzle of a fluid ejection loom is disclosed in
As disclosed in Japanese Patent Application Laid-Open No. 104743 or Japanese Patent Application Laid-Open No. 60-209049, a pressure sensor for electrically detecting a fluid pressure is provided on a fluid path of a jetting fluid for weft conveyance, and a plurality of pressure sensors are provided. Alternatively, the pressure distribution of the ejected fluid is measured by moving a single pressure sensor. Since this pressure data is obtained as an electrical signal, a processing system having a display, a printer, and the like has been formed to process the data and display it as visible information. Further, as disclosed in JP-A-2-19545, a method and apparatus for measuring the performance of a fluid ejection nozzle using a pressure sensor in the same manner as described above have been proposed. Further, as disclosed in JP-A-61-167052 or JP-A-61-167063, the flow velocity distribution of the jet airflow of the air jet loom and the state of the fluid path by the reed cascade are described. Devices for measuring have also been proposed. In an air-jet loom, the air flow passes through guide grooves formed in a so-called deformed reed blade row, and the shape and dirt of the guide grooves affect the air flow. And the condition of the row of reed blades. In the measurement of the air jet, a pitot tube and a pressure sensor are used to measure a flow velocity, a pressure distribution, and the like in a guide groove formed by the row of reed blades.

[0003]

In the case of the above-mentioned conventional technology, the pressure distribution and the direction of the injected fluid are measured.
Since a pressure sensor is used, a data processing system for the sensor and a system for converting the sensor output into visible information are required, and the configuration of the entire apparatus becomes complicated, and there is a problem that it cannot be easily measured. . Furthermore, since the apparatus is complicated as described above, it is not possible to easily adjust the flow and direction of the jet jet from the fluid jet nozzle on the loom, and to inspect and repair the nozzle and reed blades. There was a disadvantage that work efficiency was poor.

[0004] The present invention has been made in view of the above-mentioned problems of the prior art, and is capable of easily and reliably measuring the pressure, direction, and the like of a jet jet from a fluid jet nozzle. An object of the present invention is to provide a jet flow measuring method and a jet flow measuring device in a loom.

[0005]

SUMMARY OF THE INVENTION The present invention provides a pressure-sensitive film, which undergoes a physical change such as movement or destruction of particles or a change in optical performance when subjected to pressure, by a jet of a fluid jet from a fluid jet nozzle. A jet flow measuring method for a fluid jet loom disposed on a path and measuring the state of the jet by visual change of the pressure-sensitive film due to the pressure of the jet.

According to the present invention, there is provided a pressure-sensitive film which undergoes a physical change by receiving a pressure, and a holding means for detachably disposing the pressure-sensitive film at a predetermined position on a path of a jet flow jetted from a fluid jet nozzle. This is a jet flow measuring device in a fluid jet loom including a member.

[0007]

According to the jet flow measuring method and jet flow measuring device of the fluid jet loom of the present invention, the physical state of the pressure-sensitive film changes by applying the jet jet injected from the fluid jet nozzle to the pressure-sensitive film. This change can be visually recognized, and the state of the jet can be directly measured by looking at the pressure-sensitive film.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, in which the nozzle performance of a fluid injection nozzle 10 is measured. For example, the performance of a main nozzle and a sub-nozzle of an air injection loom for injecting air and feeding a weft is shown. The measurement is performed.
The fluid ejection nozzle 10 is attached to a nozzle support member 12 and is installed at a predetermined position on a measurement table 14. Measuring table 14
Is provided with a film holding member 18 to which a pressure-sensitive film 16 is fixed on one side surface.

The pressure-sensitive film 16 uses, for example, Prescale (trade name) manufactured by Fuji Photo Film Co., Ltd., and has scales 20 formed in a cross shape on the surface. This pressure-sensitive film changes the color density according to the pressure, and the mechanism is to use a film coated with a microencapsulated color former and a film coated with a color developer, When pressure is applied, the microcapsules are broken, and the colorless dye is absorbed by the color developer to form a color. In addition, as another pressure-sensitive film, a surface film having a smooth surface and a receiving plate having the same smooth surface are overlapped, and the film in the pressure-receiving portion is in close contact with the receiving plate, and the light in the portion is May be different from each other. Alternatively, a pressure-sensitive film may be used in which the carbon of the carbon paper is transferred to the mount when pressure is applied by using carbon paper and mount.

In the jet flow measuring method of this embodiment, a fluid jet nozzle 10 to be measured is attached to a nozzle support member 12 and fixed at a predetermined position. The fluid jet nozzle 10 is connected to a fluid pressure source (not shown) to Inject. At this time, the center of the scale 20 of the pressure-sensitive film 16 is positioned at a desired fluid ejection center at the predetermined mounting position of the fluid ejection nozzle 10. Then, after the fluid is ejected toward the pressure-sensitive film 16, the ejection of the fluid is stopped, and the color state of the surface of the pressure-sensitive film 16 is observed.

In general, the performance of the fluid ejection nozzle 10 is evaluated based on the ejection direction, ejection pressure, and convergence of the ejection fluid, and any of these evaluation items deviates from the standard set for each item. Is determined to be defective. The evaluation of the ejection direction is made based on how much the center of pressure of the ejection fluid deviates from a desired position when the ejection hole of the fluid ejection nozzle 10 is oriented in a predetermined direction and the fluid is ejected. In addition, the evaluation of the ejection pressure is based on the maximum pressure or the average pressure on the flat plate when the fluid to be injected is applied to the flat plate at a predetermined position when the fluid is injected into the fluid injection nozzle 10 at a predetermined pressure. Performed by Further, the degree of convergence is evaluated based on whether or not a range of pressure equal to or higher than a predetermined value falls within a certain range in a pressure distribution of the injected fluid at a predetermined position.

For example, in FIG. 1, a slightly upper left portion on the drawing from the center of the scale 20 changes to a dark color.
The center of the darkened portion is the center of the pressure of the ejected fluid, and the ejection direction is determined based on the center of the ejected fluid. The value of the pressure can be determined from the darkness of the color. Further, the degree of convergence of the ejected fluid is determined from the spread of the darkened portion of the pressure-sensitive film 16. Therefore, in the fluid ejection nozzle 10 of FIG. 1, it can be understood that the pressure center of the ejection fluid tends to be slightly shifted to the upper left from the desired position on the drawing.

According to the jet flow measuring method and the jet flow measuring device in the fluid jet loom of this embodiment, the fluid jet direction, jet pressure and convergence of the fluid jet nozzle 10 can be adjusted without using a complicated pressure sensor system. It is easy to understand at a glance on the spot, and the measurement operation can be easily performed in a short time. Further, by forming the film holding member 18 of this embodiment so as to be directly attachable to a loom, it can be used for evaluating the performance of a fluid ejection nozzle attached to the loom and for evaluating the characteristics of the jet flow.

Next, a second embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, a pressure-sensitive film 16 is arranged on a weaving machine (not shown) so as to face a fluid injection hole of a main nozzle 22 for weft insertion. The pressure-sensitive film 16 includes a film holding member 28.
The film holding member 28 has an attachment portion 32 attached to a reed 30 of a loom, and a sub nozzle 34.
And a scale 36 for measuring the distance from the object. The pressure-sensitive film 16 is disposed at a predetermined position in a guide groove 42 formed by the concave portion 40 of each reed blade 38 of the reed 30. In FIG. 2, the main nozzle 22, the sub nozzle 2
4. The illustration of the support mechanism of the reed 34 is omitted.

The method of using the jet flow measuring device of this embodiment is to measure the fluid jetting direction of the main nozzle 22 and the sub-nozzle 34 at the mounting position of the pressure-sensitive film 16 in the same manner as in the first embodiment. The adjustment of the nozzle mounting angle of each nozzle is performed, and the characteristics of the guide groove 42 provided in the reed 30 are measured. Main nozzle 22 and sub nozzle 3
In the adjustment of the mounting angle of 4, the pressure-sensitive film 16 is arranged at a predetermined position from the nozzle tip by the scale 36, the center of pressure of the jet flow is confirmed, and the angle is adjusted to an appropriate angle. In order to measure the characteristics of the guide groove 42, as shown in FIG.
The center of pressure and the degree of convergence of the jet flow in 2 are measured, and dirt on the reed wings 38 is removed at locations having the above characteristics. In the case of this embodiment, even if the scale 20 is not formed on the pressure-sensitive film 16, the position adjustment of the nozzles 22 and 34 and the guide groove 42 are performed based on the relative position of the jet flow with respect to the guide groove 42 at the mounting position. Is possible.

According to the jet flow measuring method and the jet flow measuring device in the fluid jet loom of this embodiment, the color of the pressure-sensitive film 16 can be changed on the loom without using a complicated system such as a pressure sensor. It is possible to easily measure the state of the jet fluid, to easily adjust the mounting angles of the nozzles 22 and 34 and to measure the characteristics of the reed 30 and the like.

Next, a third embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the characteristics of the reed 30 are measured outside the loom.
Is vertically fixed by a holding portion 54 and a holding screw 56 in a groove portion of a holder 52 provided on a horizontal measurement table 50. A nozzle 58 for measurement is provided diagonally forward of the guide groove 42 of the reed 30 in the same positional relationship as the auxiliary nozzle of the loom, and this nozzle 58 is fixed to the moving table 62 via the mounting member 59. I have. The pressure-sensitive film 1 inserted between the reed wings 38
6 is fixed to a moving table 62 via a film holding member 60 and a position adjusting mechanism 61. Position adjustment mechanism 6
1 has an adjusting screw 63 for moving the film holding member 60 in the Y-axis direction in FIG. 4 and a drive motor 65, and a feed nut 70 fixed to the film holding member 60 is screwed to the position adjusting screw 63. doing. Further, the motor 6
5 is attached to a moving member 73, and provided with an adjusting screw 67 for moving the film holding member 60 via the moving member 73 in the X-axis direction in FIG.

The moving table 62 is provided on the guide rail 64 so as to be movable in parallel with the reed 30 and is fixed to the back surface of the moving table 62; And a motor 7 for rotating the feed screw 71.
2, the guide rail 64 is provided so as to be movable on the guide rail 64 to an arbitrary position. The motors 65, 69, 72 are positioned at a plurality of predetermined positions by the feed control device 74. The motors 65 and 69 and the adjusting screws 63,
The moving table 62 may be manually moved instead of the motor 72 instead of providing the motor 67.

The method of using the jet flow measuring device of this embodiment is as follows.
To move the moving table 62 to the measurement position,
The pressure-sensitive film 16 is fixed to the film holding member 60 and inserted between the reed blades 38. The adjustment of the pressure-sensitive film 16 in the XY axis directions is performed by operating the motors 65 and 69. Thereafter, air is jetted from the nozzle 58, and the pressure-sensitive film 1
The performance and characteristics of the reed 30 are evaluated by observing the state of the color 6 and measuring the pressure center, the degree of convergence, the injection direction, and the like of the injection flow.

According to the jet flow measuring method and jet flow measuring device in the fluid jet loom of this embodiment, the characteristics of the reed 30 can be easily measured, and the measurement result can be immediately visually recognized. As a result, it is possible to quickly collect data for determining whether the reed 30 is good or bad.

The pressure-sensitive film of the present invention is not limited to the above-mentioned embodiment, but may be any film as long as it undergoes some physical change upon receiving a fluid pressure and the film can be visually recognized. In addition, the change in color of the pressure-sensitive film is converted into an electric signal using a photoelectric conversion element such as an image sensor, and it is subjected to data processing as it is or
It may be displayed on a display or printed out. The fluid to be measured in the present invention includes both gas and liquid. The present invention can be applied to both a water jet loom and an air jet loom.

[0022]

According to the jet flow measuring method and the jet flow measuring device in the fluid jet loom of the present invention, the state of the jet fluid jetted from the nozzles can be easily visually recognized, and The configuration can be simplified.
Moreover, since the state of the fluid at that position is immediately displayed on the pressure-sensitive film itself, the measurement time is not required, and the adjustment of the nozzle position and the determination of the evaluation can be performed quickly.

[Brief description of the drawings]

FIG. 1 is a perspective view of a jet flow measuring device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a jet flow measuring device according to a second embodiment of the present invention.

FIG. 3 is a front view showing a measurement state of a pressure-sensitive film according to a second embodiment of the present invention.

FIG. 4 is a partially broken front view of an injection flow measuring device according to a third embodiment of the present invention.

FIG. 5 is a partially broken plan view of a jet flow measuring device according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Nozzle 16 Pressure sensitive film 18 Film holding member

Claims (2)

(57) [Claims] 1. A pressure-sensitive film that undergoes a physical change by receiving a pressure is disposed on a path of a jet flow jetted from a fluid jet nozzle, and the physical change of the pressure-sensitive film due to the pressure of the jet flow is visually recognized. A jet flow measuring method for a fluid jet loom, characterized in that the state of the jet flow is measured by grasping the target. 2. A pressure-sensitive film that undergoes a physical change by receiving a pressure, and a holding member that detachably disposes the pressure-sensitive film at a predetermined position on a path of a jet flow jetted from a fluid jet nozzle. A jet flow measuring device for a fluid jet loom, comprising: