JP3045415U - Turbidity measurement standard plate holder - Google Patents

Abstract

(57) [Problem] To provide a turbidity measurement standard plate holder for stably holding a turbidity measurement standard plate in turbidity measurement. The turbidity measurement standard plate, which is a rectangular plate-like body (A) whose central portion is a standard turbidity body, has an internal space that is received while sliding downward from above, And the outer surface shape is a rectangular plate-like body (B), and when a turbidity measurement standard plate is installed at the center thereof, at least a portion of the turbidity measurement standard plate of the turbidity measurement standard The rectangular plate-shaped body (B) has an external shape that is slid into the film holder receiver of the turbidity measuring device, and is provided so as to penetrate a window having an area that allows light from the light source to hit and transmit. It is a turbidity measurement standard plate holder.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a turbidity measurement standard plate holder. The holder of the present invention holds a turbidity measurement standard plate and is installed at a predetermined position of a device (hereinafter referred to as a turbidity measuring device) for measuring turbidity of a plastic film, a plastic plate, glass, etc. Used for turbidity measurement.

[0002]

[Prior art]

 The more transparent a plastic film, a plastic plate, and a glass are, the higher the utility value is. One of the measures of the transparency is turbidity (haze), which is based on ASTM standard D-1003 (Haze and Luminous Transmittance of Haze). Transparent Plastics). A turbidity measuring device for measuring turbidity based on this standard is REFLECTANCE TRANSMITTANCE METER HR-100 (hereinafter abbreviated as turbidity meter) manufactured by Murakami Color Research Laboratory. Shown in

In FIG. 1, a light beam from a lamp 1 passes through a condenser lens 3, an interchangeable filter 5, a variable aperture 7, a shutter 9, and a collimator lens 11, and irradiates a target sample supported on a film holder receiver 13 with light. The transmitted light or the scattered light is measured by the light receiving element 15 or the reflected light measuring window 17 or the like. Using this device, the object of turbidity measurement (plastic film, plastic plate, glass plate, etc.) is directly fixed to the turbidity measurement object installation location 16 by the sample holder 14, or as shown in FIG. Attach it to the sample holder, attach it to the film holder receiver 13 provided at the turbidity measurement object installation location 16, and install it at a right angle to the light coming from the light source. Is measured, and this value is substituted into a turbidity calculation equation by a computer to measure turbidity.

This instrument uses a sample whose turbidity is known first, that is, a turbidity measurement standard plate, and adjusts a computer installed in conjunction with this instrument. If a turbidity measurement standard plate of 0 is installed in the film holder receiver 13 and the measurement is made, the correct turbidity of the unknown sample can be measured quickly unless the computer display is set to 10. Impossible. Therefore, the turbidity measurement standard plate must first be installed at a right angle to the light beam at the place where the turbidity measurement standard plate is installed. However, as shown in FIG. It is composed of a transparent glass plate, and comprises a light transmitting part constituting the standard turbid body 21 and a non-transmitting part 23 whose surrounding surface is painted black. The turbidity measuring plate 19 cannot often be installed at right angles to the light beam. The reason will become clear in the following explanation.

The purpose of a turbidity meter is to measure a turbidity measurement object, and the turbidity measurement object has a large number of samples to be measured. For installation at right angles, a special film holder is used, a film is mounted on the film holder, and the film is inserted into the film holder receiver 13 fixed to the turbidity measurement object installation location, and the measurement is performed. However, it is a reliable method of measuring turbidity without labor.

FIG. 4 shows the film holder 24 described above. As shown in (a) of the figure, the film holder 24 has a plate member 25 having a cylindrical portion 26 at the center and two sheets having a circular hole 28 into which the cylindrical portion 26 can be fitted as shown in (d). A sample film is formed on the cylindrical portion 26, and the sample film is covered with the circular hole 28 so that the sample film is integrated as shown in FIG. Then, it is dropped into the film holder receiver 13 shown in FIG. 1 to be fixed, and is used for measurement. The thickness of the film holder 24 is determined so that the film holder 24 can fit into the space of the film holder receiver 13 exactly. The film holder 24 is designed so that it can be securely mounted on the film holder 13.

When the frequency of use of the turbidity measurement standard plate and the frequency of use of the film holder are compared, the latter is several hundred times larger than the former, and the use of the film holder is prioritized, and the “receiving” portion of the film holder is provided. This is because it is more reasonable to use standard equipment. That is, the turbidity measurement standard plate is usually made of a glass plate, and has various thicknesses depending on the type. In most cases, the turbidity measurement standard plate does not fit tightly in the “receiving” portion of the film holder. Therefore, depending on the type of turbidity measurement standard plate, even if the turbidity measurement standard plate is placed on the “receiving” part of the film holder, the optical axis of the light from the light source must be centered on the measurement part of the turbidity measurement standard plate. In addition, the turbidity measurement standard plate is not perpendicular to the optical axis and tilts, so that the amount of transmitted light is incorrect and normal turbidity measurement becomes impossible. Also, the turbidity measurement standard plate is small, so it is difficult to hold, the surface is easily stained, and the material is glass, so that it is easily broken.

[0008]

[Problems to be solved by the invention]

 As mentioned above, the turbidity measurement standard plate can be used as it is because the size of the film holder receiver and the size of the turbidity measurement standard plate are different. Another object of the present invention is to provide a holder having a structure that can be mounted on a film holder receiver.

[0009]

[Means for Solving the Problems]

 The present inventor is easy to manufacture, has a simple structure, is easy to assemble and clean, can install a turbidity measurement standard plate inside, and fits tightly into the film holder receiver. Completed a turbidity measurement standard plate holder with a structure that can be used. That is, the present invention has an internal space that can be received by sliding a turbidity measurement standard plate, which is a rectangular plate-like body, the center of which is a standard turbidity body, from top to bottom. When the turbidity measurement standard plate is installed in the center of the turbidity measurement device, the turbidity measurement device is attached to at least all of the turbidity measurement standard plates. It is provided through a window with an area large enough to allow light from the light source to strike and pass through.The external shape of the rectangular plate-like body is shaped so that it can be received while sliding into the film holder receiver of the turbidity meter. It is a standard measurement plate holder.

[0010]

[Embodiment of the invention]

 The turbidity measurement standard plate used in the present invention has a structure as shown in FIG. 2 as described above. For example, a product manufactured by Kyoritsu Co., Ltd. has a length of 100 mm, a width of 30 mm, and a thickness of 5 mm, and is located at the center. The standard turbid body has a circular shape and a diameter of 25 mm, and the other portions are filled with black paint. Fig. 3 shows the turbidity measurement standard plate holder of the present invention.

The structure of the turbidity measurement standard plate holder of the present invention may be any method as long as it has the shape shown in FIG. More specifically, the turbidity measurement standard plate holder 31 forms an internal space 35 having a constant thickness in a rectangular plate-like body 33 which can be received while sliding the turbidity measurement standard plate downward from above, When a turbidity measurement standard plate is installed at the center of the rectangular plate-shaped body 33, at least the portion of the standard turbidity body of the turbidity measurement standard plate can be transmitted by light from the light source of the turbidity measurement device. A window 37 having an area of about 30 mm is provided so as to penetrate in the thickness direction, and the external shape and dimensions of the rectangular plate 33 are almost tightly received while sliding on the film holder receiver 13 of the turbidity measuring device. It has a shape. The thickness of the internal space 35 is selected to be thicker than expected of the turbidity measurement standard plate. Further, as shown in FIG. 5, a screw hole is provided near the upper end opening of the internal space 35, and these holding screws 39 are screwed in so as to press the upper edge of the turbidity measurement standard plate 19 to be inserted. It is desirable.

The turbidity measurement standard plate holder of the present invention may be manufactured by, for example, cutting a single plate-shaped body using a machine tool or an electric discharge machine, and machining each surface of the two plates. It may be cut out into a predetermined shape by a machine or an electric discharge machine, then combined, and integrated with an adhesive or a bolt with a thread, or may be manufactured by injection molding of plastic. The external shape of the turbidity measurement standard plate holder 31 of the present invention needs to be a shape that can be inserted into the film holder receiver 13 while sliding. The shape of the film holder is as shown in FIG. 4, and the external shape of the film holder must match the receiving shape of the film holder receiver 13 shown in FIG. 1 except for the clearance fit dimensions.

[0013]

[Effect of the invention]

 The holder of the present invention has the following effects. 1. Even if a commercially available turbidity measurement standard plate is attached to the turbidimeter as it is, it does not match the size of the turbidimeter film holder receiver, so the optical axis does not come to the center of the measurement part, and correct turbidity measurement can be performed. Although it is impossible, by attaching a holder, accurate turbidity can be measured. 2. The commercially available turbidity measurement standard plate was small and difficult to hold, and was easily stained. However, it was solved by attaching a holder. 3. The commercially available turbidity measurement standard plate was made of glass and thus was easily broken. However, it was solved by attaching a holder.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view of a turbidity measuring device for measuring turbidity.

FIG. 2 shows a turbidity measurement standard plate, (a) is a front view,
(B) is AA sectional drawing.

FIG. 3 is a perspective view of the turbidity measurement standard plate holder of the present invention.

4A and 4B show a film holder, wherein FIG. 4A is a perspective view of a plate member having a cylindrical portion, FIG. 4B is a perspective view of a plate member having a circular hole, and FIG. 4C is a perspective view of an assembled film holder. It is.

FIG. 5 is a view showing a modification of the holder of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp 3 Condenser lens 5 Exchangeable filter 7 Variable aperture 9 Shutter 11 Collimator lens 13 Film holder receiver 14 Sample holder 15 Light receiving element 16 Turbidity measurement object installation place 17 Reflection light measurement window 19 Turbidity measurement standard plate 21 Standard turbidity Degree body 23 Non-transmitting part 24 Film holder 25 Plate member 26 Cylindrical part 27 Plate member 28 Circular hole 31 Turbidity measurement standard plate holder 33 Rectangular plate 35 Internal space 37 Window 39 Holding screw

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) The creator Shinji Hasegawa 8-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Japan Unicar Corporation Kawasaki Kogyosho (72) The creator Rumi Tanaka 8-, Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa 1. Inside of Nihon Unicar Co., Ltd. Kawasaki Plant

Claims (2)

[Utility model registration claims] 1. A turbidity measuring standard plate having a rectangular platy body (A) whose central portion is a standard turbidity body has an internal space that can be received while sliding downward from above. When the turbidity measurement standard plate is installed in the center of the turbidity measurement standard plate at least in the portion of the turbidity measurement standard plate, The external shape of the rectangular plate-shaped body (B) is a shape that can be received while sliding on the film holder receiver of the turbidity measuring device. It is a turbidity measurement standard plate holder. 2. The turbidity measurement standard plate holder according to claim 1, further comprising means for pressing said turbidity measurement standard plate near an entrance of said internal space.