JP2009288012A - Measuring instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring instrument which improves ground-contact stability, and moreover is unbulky and does not occupy much space. <P>SOLUTION: The measuring instrument 1 includes measuring cylinders 2, 3 having straight cylindrical measuring portions 20, 30 having graduations marked on their outer peripheral surfaces, and mouth portions 21, 31 provided at ends of the measuring portions 20, 30, and is employed for measuring the volume of a free-flowing material put in the measuring cylinder 2 or 3 by the graduations. The instrument includes the measuring cylinders 2, 3 of a pair arranged side by side in directions reversed vertically. The open area of the mouth portion 21 formed in one measuring cylinder 2 out of the pair of measuring cylinders 2, 3 is larger than the internal cross section in the direction perpendicular to the axis of the measuring portion 20 of the one measuring cylinder 2, and the open area of the mouth portion 31 formed in the other measuring cylinder 3 is larger than the internal cross section in the direction perpendicular to the axis of the measuring portion 30 of the other measuring cylinder 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a measuring instrument for measuring the volume of a fluid on a scale.

  As this type of measuring instrument, a measuring instrument (a graduated cylinder) in which a scale is attached to the outer peripheral surface of a bottomed cylindrical transparent container is generally widely known. In this measuring instrument, the volume of the fluid can be measured by putting the fluid to be measured from the upper end opening and reading the scale at the height position of the liquid level.

By the way, since the above-mentioned measuring instrument has a vertically long shape with a large aspect ratio (height / diameter), there is a problem that the ground contact stability is poor and it is easy to fall down. Therefore, conventionally, for example, a technique for improving the grounding stability by fixing a measuring instrument to a pedestal has been proposed as disclosed in Patent Document 1 below. In this technique, a measuring instrument is erected on a flat plate-like pedestal, and the bottom of the measuring instrument is fixed to the pedestal by fixing means such as a rubber band. According to this technique, since a vertically long measuring instrument is supported by a flat plate-like pedestal, the grounding stability is improved and it is difficult to fall over.
JP-A-9-187663

However, in the above-described prior art, it is difficult to fix the cylindrical measuring instrument vertically with respect to the flat plate-like pedestal, and the measuring instrument is attached to the pedestal at an inclination or detached from the pedestal. In addition, the grounding stability of the measuring instrument may deteriorate.
In addition, since a considerably large pedestal is used to improve the grounding stability of the measuring instrument, the measuring instrument with the pedestal is bulky and takes up space when using or storing the measuring instrument with the pedestal. There is a problem.

  The present invention has been made in consideration of the above-described conventional problems, and an object of the present invention is to provide a measuring instrument that can improve grounding stability and is not bulky and takes up space.

  A measuring instrument according to the present invention is provided with a measuring cylinder having a straight cylindrical measuring part with a scale on the outer peripheral surface, and a mouth provided at an end of the measuring part, and the measuring cylinder is provided in the measuring cylinder. The measuring device for measuring the volume of the contained fluid on the scale has a pair of measuring tubes arranged in parallel in an upside down direction, and is formed on one of the pair of measuring tubes. The opening area of the mouth portion is larger than the inner cross-sectional area in the direction perpendicular to the axis of the measuring portion of the one measuring tube, and the opening area of the mouth portion formed in the other measuring tube is the measuring portion of the other measuring tube. It is characterized by being larger than the inner cross-sectional area in the direction orthogonal to the axis of the part.

Due to such a feature, the measuring instrument has a configuration in which a pair of measuring cylinders are arranged in parallel. Therefore, the horizontal dimension (diameter) of the measuring instrument increases, and the aspect ratio of the measuring instrument decreases.
In addition, since the pair of measuring cylinders are provided in a vertically inverted direction, a mouth portion is provided at each end of the measuring instrument. Accordingly, a mouth is provided at the lower end portion of the measuring instrument regardless of the direction in which the measuring instrument is turned upside down. Since the opening area of the mouth is larger than the cross-sectional area of the measuring unit, the grounding surface of the measuring unit becomes large regardless of the direction in which the measuring unit is turned upside down.
Furthermore, since the opening area of the mouth is larger than the inner cross-sectional area of the measuring part, it is easy to pour fluid into the measuring cylinder.
The “fluid” in the present invention includes fluid solids such as granular aggregates and powders in addition to liquids and viscous bodies.

  In the measuring instrument according to the present invention, the one measuring tube is provided with a bottom portion whose diameter is larger than that of the measuring portion of the one measuring tube, and the inner volume of the bottom portion is measured by the other measuring tube. Preferably it is equal to the maximum possible weight value.

As a result, when measuring the amount of fluid below the maximum measurement value of the other measuring cylinder, place the measuring instrument with the mouth of the other measuring cylinder facing upward and place the fluid inside the other measuring cylinder. Put in and weigh. On the other hand, when measuring the amount of fluid that exceeds the maximum measurement value of the other measuring cylinder, place the measuring instrument with the mouth of one measuring cylinder facing upward and put the fluid in one measuring cylinder. Weigh.
In addition, since the bottom portion has a diameter larger than that of the measuring portion, the height of one measuring tube is kept low, and as a result, the height of the measuring device is kept low.

  In the measuring instrument according to the present invention, it is preferable that the inner cross-sectional area of the other measuring tube in the direction orthogonal to the axis is smaller than the inner cross-sectional area of the one measuring tube in the direction orthogonal to the axis.

  Thereby, the amount of change in the liquid surface position with respect to increase / decrease of the fluid volume is larger in the other measuring tube than in the one measuring tube.

  Further, in the measuring instrument according to the present invention, the one measuring tube and the other measuring tube are separately formed, and the one measuring tube is formed in a bottomless cylindrical shape in which the bottom side of the bottom portion is opened. It is preferable that the opening surface on the bottom surface side of the bottom portion is closed by the mouth portion of the other measuring tube.

Thereby, it is possible to shape | mold one measuring cylinder which has the bottom part diameter-expanded rather than the measurement part with a simple shaping die. In other words, if one of the measuring cylinders is a bottomed cylinder, it is necessary to use a special mold such as a separable mold in order to form the inner surface of the bottom that is larger in diameter than the measuring section. The molding operation becomes complicated. On the other hand, in the measuring instrument according to the present invention, since one measuring cylinder is a bottomless cylindrical shape, the mold forming the inner surface of the bottom portion can be pulled out from the bottom surface side, and the molding operation is simple. .
Also, since the opening surface on the bottom side of one measuring tube is closed by the mouth of the other measuring tube, the opening surface is closed only by combining one measuring tube and the other measuring tube. Fluid can be stored in the measuring cylinder.

According to the measuring instrument according to the present invention, since the aspect ratio of the measuring instrument is small and the lower end portion of the measuring instrument has an enlarged shape in any direction in which the measuring instrument is turned upside down, the measuring instrument The grounding stability can be improved.
In addition, since the aspect ratio of the measuring instrument is small, the grounding stability can be ensured without significantly increasing the lower end portion of the measuring instrument, and the measuring instrument can be made into a bulky shape.

Hereinafter, embodiments of a measuring instrument according to the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a longitudinal sectional view of a measuring instrument 1 in the present embodiment, and (a) and (b) in FIG. 2 is a perspective view of a first measuring cylinder 2 described later, and FIG. 3 is a perspective view of a second measuring cylinder 3 described later. In the present embodiment, one side of the measuring instrument 1 in the axial direction (the lower side in FIG. 1A and the upper side in FIG. 1B) is the A side, and the other side in the axial direction of the measuring instrument 1. The upper side in FIG. 1A and the lower side in FIG.

  As shown in FIG. 1, the measuring instrument 1 is a measuring instrument for measuring the volume of a fluid, and has a configuration in which a pair of measuring cylinders 2 and 3 that are separately injection-molded are combined. This measuring instrument 1 measures the volume of the fluid accommodated in any one of a pair of measuring cylinders 2 and 3 with the scale attached to the outer peripheral surface of the measuring cylinders 2 and 3. More specifically, the measuring instrument 1 includes a first measuring cylinder 2 (corresponding to “one measuring cylinder” in the present invention) and a second measuring cylinder 3 (the “other measuring cylinder” in the present invention) having different measuring ranges. Are arranged in parallel in an upside down orientation.

  As shown in FIGS. 1 and 2, the first measuring cylinder 2 is a transparent resin-made or glass-made cylinder portion, and has a larger internal volume than the second measuring cylinder 3, and has a large area (in FIG. 1). 2.0cc to 4.0cc). The first measuring cylinder 2 is a bottomless cylindrical member whose both ends are open. As a schematic configuration of the first measuring cylinder 2, a straight cylindrical first measuring section 20 with a scale on the outer peripheral surface is provided. And a first opening 21 connected to the end of the first weighing unit 20 on the A side, and a bottom 22 connected to the end of the first measuring unit 20 on the B side.

  The first metering unit 20 is a cylindrical tube unit that measures the volume of the fluid accommodated in the first metering tube 2, and the above-described large-scale scale is pivoted on the outer peripheral surface of the first metering unit 20. It is written side by side in the direction. The scale of the first measuring unit 20 is attached so that the numerical value increases as it goes from the B side to the A side. In FIG. 1, 2.0 cc) is attached.

  The first mouth portion 21 is a funnel for pouring a fluid into the first measuring cylinder 2 and communicates with the first measuring portion 20. The first mouth portion 21 has a substantially eccentric cone shape in which the cross-sectional shape in the direction perpendicular to the axis is gradually enlarged from the B side toward the A side, and the opening area of the first mouth portion 21 (the opening on the A side) The area of the surface 21a is larger than the inner cross-sectional area of the first measuring unit 20 in the direction perpendicular to the axis.

  The bottom portion 22 is a cylindrical portion that accommodates fluid, and communicates with the first measuring portion 20. The bottom portion 22 has a diameter larger than that of the first measuring portion 20, and the internal volume of the bottom portion 22 is equal to the maximum measured value (2.0 cc in FIG. 1) that can be measured by the second measuring portion 30 described later. The bottom portion 22 is a bottomless cylindrical portion whose bottom surface side (B side) is opened, and a tip end surface (B side end surface) of the bottom portion 22 is a tapered outer periphery of a second mouth portion 31 described later. The surface is in contact with the entire surface, and the opening surface on the bottom surface side of the bottom portion 22 is closed by a second mouth portion 31 described later. Further, the bottom portion 22 has a shape such that the second mouth portion 31 is fitted therein. More specifically, the bottom 22 is formed on a C-shaped outer wall portion 22a extending along the outer edge of the opening end of the second mouth portion 31 described later and the outer edge of the second measuring portion 30 described later. A substantially U-shaped inner wall portion 22b extending along the plane, and between the outer wall portion 22a and the base end portion (the A-side end portion) of the inner wall portion 22b and the B-side end portion of the first measuring portion 20 And a tapered portion 22c having a substantially eccentric conical shape. The front end surface (end surface on the B side) of the inner wall portion 22b described above is curved along the outer peripheral surface of the eccentric conical second mouth portion 31 described later.

  As shown in FIGS. 1 and 3, the second measuring cylinder 3 is a transparent resin-made or glass-made cylinder portion, and has an inner volume smaller than that of the first measuring cylinder 2, and a small amount region (in FIG. 1). 0cc to 2.0cc) is a measuring tube that can be measured. The second measuring unit 30 is a bottomed cylindrical member whose end on the A side is closed and the end on the B side is opened. As a schematic configuration of the second measuring unit 3, a scale is provided on the outer peripheral surface. Are provided on the outer peripheral surface of the second mouth portion 31, the second mouth portion 31 connected to the B side end of the second metering portion 30, and the second mouth portion 31. And a fitting portion 32 fitted inside the bottom portion 22 described above.

  The second measuring unit 30 is a bottomed cylindrical part having a substantially semicircular shape (kamaboko shape) in cross-sectional view for measuring the volume of the fluid accommodated in the second measuring cylinder 3, and on the side of the first measuring unit 20. They are arranged in parallel. On the outer peripheral surface of the second measuring unit 30, the above-mentioned small scales are arranged side by side in the axial direction. The scale of the second measuring unit 30 is attached so that the numerical value increases as it goes from the A side to the B side. Further, the inner cross-sectional area of the second measuring unit 30 in the direction orthogonal to the axis is smaller than the inner cross-sectional area of the first measuring unit 20 in the direction orthogonal to the axis.

  The second port portion 31 is a funnel for pouring a fluid into the second measuring cylinder 3 and communicates with the second measuring portion 30. The second mouth portion 31 has a substantially eccentric conical shape in which the cross-sectional shape in the direction perpendicular to the axis is gradually enlarged from the A side toward the B side, and the opening area of the second mouth portion 31 (the opening on the B side) The area of the surface 31a) is larger than the inner cross-sectional area of the second measuring unit 30 in the direction orthogonal to the axis. Moreover, the 2nd opening part 31 is arrange | positioned so that it may cover from the B side with respect to the bottom face of the above-mentioned bottom part 22. FIG.

  The fitting portion 32 is a wall portion that is press-fitted into the B-side end portion of the bottom portion 22 and seals the bottom surface of the bottom portion 22, and hangs down along the axial direction from the outer peripheral surface of the second mouth portion 31. It is (standing up) and formed in an annular shape along the inner peripheral surface of the bottom 22. More specifically, the fitting portion 32 is formed along the C-shaped wall portion 32a in plan view extending along the inner peripheral surface of the outer wall portion 22a of the bottom portion 22 and the inner wall portion 22b of the bottom portion 22 described above. This is a combination of the extended substantially U-shaped wall portion 32b in plan view. The outer peripheral surface of the fitting portion 32 and the inner peripheral surface of the bottom portion 22 are in close contact with each other in a liquid-tight manner.

  Next, the operation of the measuring instrument 1 having the above configuration will be described.

When manufacturing the measuring instrument 1 having the above-described configuration, first, the first measuring cylinder 2 and the second measuring cylinder 3 described above are separately molded by an injection molding method. At this time, since the bottom surface of the bottom portion 22 of the first measuring cylinder 2 is opened, a mold (not shown) on the inner peripheral surface of the bottom portion 22 can be easily pulled out from the bottom surface side of the bottom portion 22.
Next, the first measuring cylinder 2 and the second measuring cylinder 3 are arranged in parallel in the vertically inverted direction, and the second mouth portion 31 is placed on the opening surface on the bottom surface side of the bottom portion 22, and the fitting portion 32 is covered. Press fit into the inside of the bottom 22. Thereby, the 1st measuring cylinder 2 and the 2nd measuring cylinder 3 are combined in parallel, and the measuring device 1 is completed. Since the measuring instrument 1 has a configuration in which the first measuring cylinder 2 and the second measuring cylinder 3 are arranged in parallel, the horizontal dimension (diameter) of the measuring instrument 1 is large. Moreover, since the bottom part 22 is diameter-expanded rather than the 1st measurement part 20, the height of the bottom part 22 is restrained and the height of the measuring instrument 1 is restrained low as a result. Therefore, the aspect ratio of the measuring instrument 1 is reduced.
Further, the bottom surface of the bottom portion 22 is closed by the second mouth portion 31, and the fluid can be accommodated in the first measuring tube 2. Further, since the fitting portion 32 is press-fitted and fitted inside the bottom portion 22, liquid tightness at the bottom portion 22 is ensured, and liquid leakage from the bottom surface of the bottom portion 22 is prevented.

  Further, when the fluid is measured using the measuring instrument 1 having the above-described configuration, first, the measuring instrument 1 is placed on a table or the like. More specifically, when measuring a small amount of fluid (2.0 cc or less), the measuring instrument 1 is placed in a direction in which the second port 31 is disposed on the upper side, as shown in FIG. At this time, the first mouth portion 21 is disposed at the lower end portion of the measuring instrument 1, and the opening area of the first mouth portion 21 is larger than the inner cross-sectional area of the first weighing portion 20. The grounding surface of the vessel 1 becomes large.

Next, the fluid is poured into the second measuring cylinder 3. At this time, since the opening area of the second mouth portion 31 is larger than the inner cross-sectional area of the second metering portion 30, it is easy to pour fluid into the second metering cylinder 3.
Then, after pouring the fluid, the scale of the position of the liquid level is read and the volume of the fluid is measured. At this time, since the inner cross-sectional area of the second measuring tube 3 is smaller than the inner cross-sectional area of the first measuring tube 2, the second measuring tube 3 has a liquid level position with respect to the fluid volume increase / decrease compared to the first measuring tube 2. The amount of change is large.

  On the other hand, when measuring a large amount of fluid (2.0 cc to 4.0 cc) exceeding the maximum measured value (2.0 cc) of the second measuring cylinder 3, as shown in FIG. Place the measuring instrument 1 in the direction of the upper position. At this time, since the measuring instrument 1 has a configuration in which the first measuring cylinder 2 and the second measuring cylinder 3 are arranged in parallel, the horizontal dimension (diameter) of the measuring instrument 1 is large, and the aspect ratio of the measuring instrument 1 is Get smaller. Further, the second mouth portion 31 is disposed at the lower end portion of the measuring instrument 1, and the opening area of the second mouth portion 31 is larger than the inner cross-sectional area of the second measuring portion 30. The ground contact surface of 1 becomes large.

  Next, the fluid is poured into the inside of the first measuring cylinder 2, the scale of the position of the liquid level is read, and the volume of the fluid is measured. At this time, since the opening area of the first mouth portion 21 is larger than the inner cross-sectional area of the first measuring portion 20, the fluid can be easily poured into the first measuring tube 2. Further, since the inner volume of the bottom portion 22 is equal to the maximum measured value of the second measuring cylinder 3, a large amount of fluid that cannot be measured by the second measuring cylinder 3 is measured by the scale of the first measuring section 20.

  According to the measuring instrument 1 having the above-described configuration, the aspect ratio of the measuring instrument 1 is small, and the lower end portion of the measuring instrument 1 is enlarged regardless of the orientation in which the measuring instrument 1 is turned upside down. Therefore, the grounding stability of the measuring instrument 1 can be improved.

In addition, since the aspect ratio of the measuring instrument 1 is small, the grounding stability can be ensured without significantly increasing the lower end portion of the measuring instrument 1, and the measuring instrument 1 can be made not bulky.
Furthermore, since the bottom portion 22 has a diameter larger than that of the first mouth portion 21 and the height of the bottom portion 22 is suppressed and the height of the measuring instrument 1 is suppressed, the aspect ratio of the measuring instrument 1 is reduced, The grounding stability can be improved and the measuring instrument 1 can be downsized.

  When the object to be measured is a small amount of fluid, it is measured by the second measuring cylinder 3, and when the amount of fluid exceeds the maximum measuring value of the second measuring cylinder 3, the measuring instrument 1 is turned upside down to turn the first measuring cylinder. Since the measuring cylinder 2 can measure the fluid, a single meter 1 can measure a wide range of fluid from a small amount to a large amount.

  In addition, since the second measuring cylinder 3 has a larger amount of change in the liquid surface position with respect to the fluid volume increase / decrease than the first measuring cylinder 2, when the second measuring cylinder 3 measures, the first measuring cylinder 2 measures Compared with the case, it is possible to measure the volume of the fluid finely. Thereby, the exact volume of the fluid can be known.

  Further, since the first measuring cylinder 2 has a bottomless cylindrical shape and the mold forming the inner surface of the expanded bottom portion 22 can be pulled out from the bottom surface side, the molding operation is simple, and the measuring instrument 1 Can be easily manufactured.

As mentioned above, although embodiment of the measuring device which concerns on this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the above-described embodiment, the inner cross-sectional area of the second measuring cylinder 3 is smaller than the inner cross-sectional area of the first measuring cylinder 2. It is possible to make the cross-sectional areas equal, or it is possible to make the inner cross-sectional area of the second measuring cylinder 3 larger than the inner cross-sectional area of the first measuring cylinder 2.

  Further, in the above-described embodiment, the bottom portion 22 having an internal volume equal to the maximum measured value of the second measuring tube 3 is provided in the first measuring tube 2, but in the present invention, the bottom portion of the first measuring tube 2 is A configuration in which the diameter is not expanded is also possible.

  Further, in the above-described embodiment, the fitting portion 32 protrudes from the outer peripheral surface of the second mouth portion 31, and this fitting portion 32 is press-fitted and fitted inside the bottom portion 22. If it is the structure which can ensure the liquid-tightness of the bottom part 22, the fitting part 32 can also be abbreviate | omitted. For example, it is possible to secure the liquid tightness of the bottom portion 22 by welding the front end surface of the bottom portion 22 and the outer peripheral surface of the second mouth portion 31.

  In the above-described embodiment, the bottom surface of the bottom portion 22 is opened, the first measuring tube 2 is formed in a bottomless tube shape, and the opening surface on the bottom surface side of the bottom portion 22 is the second surface of the second measuring tube 3. Although it is closed by the mouth portion 31, the present invention can be configured such that the bottom surface of the bottom portion 22 is closed and the first measuring tube 2 is formed in a bottomed tube shape.

  Moreover, in above-described embodiment, the 1st measurement cylinder 2 and the 2nd measurement cylinder 3 are another components shape | molded separately, By combining the 1st measurement cylinder 2 and the 2nd measurement cylinder 3, Although the measuring instrument 1 is formed, a pair of measuring cylinders can be integrally formed in the present invention. For example, as shown in FIG. 4, the internal space of the cylindrical measuring instrument 101 is divided into two by a partition wall 101a, one side of the partition wall 101a is a first measuring tube 102, and the other side of the partition wall 101a is a second weighing. The structure used as the cylinder 103 may be sufficient. The first mouth part 121 of the first measuring tube 102 and the second mouth part 131 of the second measuring tube 103 are arranged at positions opposite to each other. Further, the inner cross-sectional area of the first measuring tube 102 is larger than the inner cross-sectional area of the second measuring tube 103, and the inner volume of the first measuring tube 102 is larger than the inner volume of the second measuring tube 103. A scale in a range from a small amount region to a large amount region is attached to the outer peripheral surface of the first cylindrical measuring unit 120 of the first measuring tube 102, and the straight second cylindrical measuring unit of the second measuring tube 103. The unit 130 is provided with a smaller scale than the first weighing unit 120.

  Moreover, in above-described embodiment, the 1st opening part 21 and the 2nd opening part 31 have comprised the eccentric cone shape, and the bottom part 22 has planar view C-shaped outer wall part 22a and planar view substantially U shape. The inner wall portion 22b having a shape and the tapered portion 22c having a substantially eccentric conical shape are formed, but the shapes of the mouth portion and the bottom portion in the present invention can be appropriately changed. For example, the mouth portion can be formed in a conical shape or a hemispherical shape that is not eccentric, or a straight cylindrical shape that is expanded in a step shape with respect to the measuring portion. It is also possible to form the bottom in a cylindrical shape, a conical shape, or a donut shape surrounding the mouth of the other measuring tube.

In the above-described embodiment, the first measuring cylinder 2 and the second measuring cylinder 3 are each formed by an injection molding method. However, in the present invention, the first measuring cylinder and the second measuring cylinder are formed by other methods. For example, the first measuring cylinder and the second measuring cylinder may be formed by a blow molding method.
In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

It is a longitudinal cross-sectional view of the measuring device for demonstrating embodiment of this invention. It is a perspective view of one measuring cylinder for demonstrating embodiment of this invention. It is a perspective view of the other measuring cylinder for demonstrating embodiment of this invention. It is a longitudinal cross-sectional view of the measuring device for demonstrating other embodiment of this invention.

Explanation of symbols

1, 101 Measuring instrument 2, 102 First measuring cylinder (one measuring cylinder)
3, 103 Second measuring tube (the other measuring tube)
20, 120 First weighing unit (weighing unit)
21, 121 First mouth (mouth)
22 Bottom 30, 130 Second weighing unit (weighing unit)
31, 131 Second mouth (mouth)

Claims (4)

A measuring cylinder having a straight cylindrical measuring unit with a scale on the outer peripheral surface, and a mouth provided at an end of the measuring unit;
In a measuring instrument for measuring the volume of fluid contained in the measuring cylinder with the scale,
A pair of measuring cylinders arranged in parallel in an upside down orientation are provided,
The opening area of the mouth portion formed in one of the pair of measuring tubes is larger than the inner cross-sectional area in the direction perpendicular to the axis of the measuring portion of the one measuring tube, and is formed in the other measuring tube. The opening area of the mouth part is larger than the inner cross-sectional area in the direction orthogonal to the axis of the measuring part of the other measuring cylinder. The measuring instrument according to claim 1,
The one measuring tube is provided with a bottom portion whose diameter is larger than that of the measuring portion of the one measuring tube,
A measuring instrument characterized in that the inner volume of the bottom is equal to the maximum measured value that can be measured by the other measuring cylinder. The measuring instrument according to claim 1 or 2,
A measuring instrument, wherein an inner cross-sectional area of the other measuring tube in the direction orthogonal to the axis is smaller than an inner cross-sectional area of the one measuring tube in the direction orthogonal to the axis. The measuring instrument according to claim 3,
The one measuring tube and the other measuring tube are separately molded,
The one measuring cylinder is formed in a bottomless cylindrical shape in which a bottom surface side of the bottom portion is opened,
An opening surface on the bottom surface side of the bottom portion is closed by a mouth portion of the other measuring tube.

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