JPH08136431A - Jig for measuring specific gravity - Google Patents

Abstract

PURPOSE: To provide a jig for measuring specific gravity enabling to measure mass in water with comparatively good accuracy even for members having specific gravity lower than 1.0. CONSTITUTION: Provided are a first pan part 1 interposed in water for use, a suspending and supporting part 2 for suspending and supporting the first pan part 1, and an engaging part 2A provided on the upper end part of the suspending and supporting part 2. The first pan part 1 is formed of a wire- shaped elastic member in a spiral shape and in which its central part is in a slightly downwardly protruded state. A second pan part 3 locked at its one end part with the suspending and supporting part at predetermined intervals is equipped above the first pan part 1. The second pan part 3 is formed of a wire-shaped elastic member in a spiral shape and in which its central part is in a slightly upwardly protruded state. An opening part 3A is provided at the central part of the second pan part 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a specific gravity measuring jig, and more particularly to a specific gravity measuring jig suitable for measuring the specific gravity of a member lighter than water.

[0002]

2. Description of the Related Art Generally, the specific gravity of a substance is "mass in air /
(Mass in air-mass in water) ". Therefore, it is essential to measure the mass in water. In this case, the mass measurement in water and in the air has been conventionally performed by the method disclosed in Japanese Patent Publication No. 6-78975.

On the other hand, in such a conventional example, there is an inconvenience that a suspending mechanism for suspending the object to be measured must be additionally provided, and the whole apparatus is large-scaled. For this reason, in recent years
A specific gravity measuring device having a hanging mechanism shown in Fig. 1 has been developed.

The specific gravity measuring device shown in FIGS. 8 to 9 is
A mass measuring device 51 formed in a flat shape, and a member cradle 5 having a U-shaped cross section and arranged at a predetermined interval above the mass measuring device 51 so as to straddle the entire mass measuring device 51.
2 and a beaker 53 placed on the member receiving base 52
And a jig suspension member 54 that is connected to the back side of the above-described mass measuring instrument 51 and extends upward to input the mass information of the object to be measured into the mass measuring instrument 51, and the jig suspending member 54. A specific gravity measuring jig 55 that is detachably moored is provided.

The jig suspending member 54 is formed in a U shape as a whole, and its lower end supporting portion 54A is horizontally projected from the weighing region of the mass measuring instrument 51 in the rear direction, and an intermediate supporting member connected to this is supported. The part 54B is set in a state of standing up,
An upper end support portion 54C connected to the intermediate strut portion 54B is arranged toward the weighing area at the center of the mass measuring instrument 51 described above in a direction along the lower end support portion 54A described above. The upper end support portion 54C of the jig suspension member 54 is provided with a locking groove 54Ca for suspending the above-described specific gravity measuring jig 55 at the tip thereof.

Further, the specific gravity measuring jig 55, as shown in FIG. 6 to FIG.
5A, a drooping support part 55B that droops and supports the saucer part 55A at one end thereof, and a disc-shaped engaging part 55C that is provided at the upper end of the drooping support part 55B and that engages with the locking groove 54Ca described above. It has and. Also, the saucer portion 55A
Is formed of a wire-shaped elastic member in a spiral shape with the central portion thereof protruding somewhat downward. The hanging support portion 55B described above is formed in a state in which the wire-shaped elastic member of the tray portion 55A extends upward from one end thereof.

In the actual measurement, first, as shown in FIG. 8, a beaker 53 containing a predetermined amount of water is placed on the center of the member receiving base 52. Then, the specific gravity measuring jig 55
The engaging portion 55C of is engaged with the locking groove 54Ca of the jig hanging member 54, and the receiving tray portion 55A is submerged in the beaker 53. Then, the scale of the liquid crystal display portion 51A of the mass measuring instrument 51 in this case is adjusted to zero.

Next, the member to be measured M is placed on the upper end support portion 54C of the jig suspending member 54, and the mass of the member to be measured M in air is measured. Then, the member to be measured M is placed on the tray 55A in the beaker 53, and the mass of the member to be measured M in water is measured. The respective mass data of the member M to be measured in air and in water are displayed on the liquid crystal display section 51A described above each time, and the mass measuring device 5
It is stored in the memory inside the unit 1, and at the same time, its specific gravity is calculated in the calculation unit.

In this case, by operating the switching means (not shown), the calculated specific gravity is switched and displayed on the liquid crystal display section 51A described above, and is also printed and output by the printing means (not shown). It has become.

[0010]

However, in each of the embodiments described above, there is a disadvantage that the mass of a resin material such as polypropylene or polyethylene whose specific gravity is less than 1.0 and floats in water cannot be measured. It was happening. For resin materials having a specific gravity of less than 1.0, if air bubbles adhere to the measuring jig, the mass measurement thereof will be seriously adversely affected. Therefore, how to suppress the adhesion of bubbles to the measurement jig has been one of the more important issues than in the past.

[0011]

An object of the present invention is to improve the disadvantages of the conventional example, and in particular, to measure the specific gravity of a member having a specific gravity of less than 1.0 in water with relatively high accuracy. The purpose is to provide a jig for use.

[0012]

According to a first aspect of the present invention, there is provided a first tray portion arranged to be used in water, and a hanging support portion for suspending and supporting the first tray portion at one end thereof.
An engaging portion provided at the upper end of the hanging support portion is provided. The first tray portion is formed of a wire-like elastic member in a spiral shape with the central portion thereof protruding somewhat downward. Above the first saucer portion, there is provided a second saucer portion whose one end is locked to the hanging support portion at a predetermined interval. Then, the second saucer portion is formed by a wire-shaped elastic member in a spiral shape with the center portion thereof protruding somewhat upward, and an opening is provided in the center portion of the second saucer portion. Is taking.

According to the second aspect of the present invention, the wire rod-shaped elastic member forming the second tray has a cross-sectional shape of a vertically elongated elliptical shape. This aims to achieve the above-mentioned object.

[0014]

When the object to be measured is lighter than water, the object to be measured is moored to the second tray part by the action of the second tray part. Therefore, when the specific gravity measuring device according to the present invention is equipped with a specific gravity measuring device, the specific gravity can be measured even if the object to be measured is lighter than water. Since the member is formed in a spiral shape and the central portion is projected slightly upward, the member to be measured is always captured by the central portion of the second tray portion.

Further, due to the action of the opening provided in the central portion of the second tray portion, bubbles and the like gathering in the central portion during the measurement are
The information passes without adhering to the saucer. The bubbles adhering to the first tray portion 1 and the second tray portion 3 are vertically oscillated over the specific gravity measuring jig while holding the object to be measured M, so that the bubbles attached to the specific gravity measuring jig. Can be easily removed. In this case, by sandwiching the object to be measured M between the first saucer section 1 and the second saucer section 3,
The object to be measured M does not come off even with a relatively large vibration.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In the embodiment shown in FIGS. 1 to 4,
The specific gravity measuring jig 10 is used by being arranged in water.
The saucer portion 1 is provided with a hanging support portion 2 that suspends and supports the first saucer portion 1 at one end portion around the first saucer portion 1, and an engaging portion 2A provided at an upper end portion of the hanging support portion 2. here,
The first tray portion 1 is formed of a wire-shaped elastic member in a spiral shape with the central portion thereof protruding somewhat downward.
The hanging support portion 2 is made of the same material as that of the first tray portion 1, and is set in a state in which a wire-like elastic member extends upward from the peripheral end portion of the first tray portion 1. ing.

Then, above the first saucer portion 1, a second end is secured to the drooping support portion 2 at a predetermined interval.
The saucer part 3 is equipped. The second saucer portion is made of the same material (wire-like elastic member) as that of the first saucer portion 1 described above, and is formed in a spiral shape with the central portion thereof protruding somewhat upward. An opening 3A is provided at the center of the second tray 3. The openings 3A prevent bubbles collected in the central portion from staying in the second tray portion 3.

Further, the wire member of the wire-like elastic member constituting the second receiving tray portion 3 and the first receiving tray portion 1 described above,
Its cross-sectional shape is formed in a vertically elongated elliptical shape,
This makes it difficult for bubbles to adhere to the wire rod portions of the first and second tray portions 1 and 3.

The second tray 3 is supported so as to be vertically movable along the above-mentioned hanging support 2. Further, the second tray portion 3 is rotatably mounted around the hanging support portion 2 while being supported by the hanging support portion 2. Reference numeral 3B indicates a connecting member made of an elastic member.

For this reason, the object to be measured M can be kept in water by being sandwiched between the first saucer portion 1 and the second saucer portion 3, whereby the object to be measured can be measured, for example, when air bubbles adhere. By applying vertical vibration to the entire jig for measuring specific gravity while holding M, bubbles attached to the jig for measuring specific gravity can be easily removed. In this respect, it is possible to greatly improve the measurement accuracy of the specific gravity measurement for the object to be measured having a specific gravity of 1.0 or less, which is particularly susceptible to the influence of bubbles.

Here, in the present embodiment, the diameter of the wire rod in each of the first tray portion 1 and the second tray portion 3 is 0.8 [m].
m] and the distance between the wire rods is 1.0 [mm]. In this case, it was confirmed that the bubbles hardly adhered, and even if the bubbles adhered, it could be confirmed that the bubbles could be easily removed by slightly vibrating.

More specifically, the diameter of the wire is set to 0.
It was set to 8 mm, and the difficulty of removing bubbles was experimentally confirmed when the distance between the wire rods was variously changed. The result is shown in FIG. As is clear from FIG. 5, when the distance between the wire rods is larger than the diameter of the wire rod, bubbles are less likely to adhere, but when the space between the wire rods is smaller than the diameter of the wire rod, bubbles are likely to adhere. It has been found.

Further, as described above, by making the cross-sectional shape of the wire rods of the first receiving tray portion 1 and the second receiving tray portion 3 an elliptical shape that is vertically long in the vertical direction, it is difficult for air bubbles to adhere while maintaining appropriate strength. There is an advantage that the state can be obtained.

In the above embodiment, the case where the first tray portion 1 and the second tray portion 3 are formed of a wire in a spiral shape is illustrated, but the present invention is not necessarily limited to this. Others, such as a plurality of wires arranged at equal intervals, or a plurality of large and small annular wires arranged concentrically and connecting two or three places with wires, etc., as long as they function equivalently to the above-described embodiment, It may have a configuration of.

[0026]

Since the present invention is constructed and functions as described above, according to this, when this is used for measuring the specific gravity, the specific gravity of a member lighter than water can be easily measured by the action of the second tray. Since the second receiving tray portion is formed in a spiral shape with the wire-like elastic member and the central portion is projected slightly upward, the measured member is always captured by the central portion of the second receiving tray portion. Therefore, it is possible to eliminate the inconvenience that the measured member separates from the second tray portion during measurement due to external vibration or the like.
Since the opening is provided in the central portion of the second tray portion, it is possible to effectively eliminate the inconvenience that air bubbles and the like are collected in the central portion of the second tray portion during measurement, and further, the first tray portion and the first tray portion If the member to be measured is sandwiched between the two receiving trays, the bubbles adhering to the first receiving tray and the second receiving tray can be easily removed by vibrating them. It is possible to significantly improve the measurement accuracy of the mass of the product, and therefore, when measuring the specific gravity of a member lighter than water, it is possible to further improve the measurement accuracy regardless of the size of the object to be measured. It is possible to provide an excellent jig for measuring specific gravity that is not found in the market.

Further, by forming the wire rod of the wire-like elastic member forming the second tray into a vertically elongated elliptical shape in the vertical direction, the wire rod-like elastic members are maintained while maintaining the elastic strength of the wire rod. Since the space can be widened, it is possible to effectively eliminate air bubbles from adhering to the wire portion, and at this point, using this allows the specific gravity of a member lighter than water to be measured with higher accuracy. Therefore, it is possible to provide a jig for specific gravity measurement which is not excellent in the related art and which can improve the reliability of the specific gravity measurement device.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view showing a part of a second tray part which constitutes a part of the embodiment shown in FIG.

FIG. 3 is an explanatory view showing another example of the wire rod used in the embodiment shown in FIG.

FIG. 4 is a perspective view of the embodiment shown in FIG.

5 is a table showing the experimental results of bubble removal in the example shown in FIG.

FIG. 6 is a front view showing a conventional example.

FIG. 7 is a perspective view showing a conventional example.

8 is a perspective view showing an example of the specific gravity measuring apparatus incorporating the conventional example shown in FIG.

9 is a perspective view showing an example of measuring the underwater mass of an object to be measured by the apparatus of FIG.

[Explanation of symbols]

 1 1st saucer part 2 Hanging support part 3 2nd saucer part 3A Opening part 10 Jig for specific gravity measurement

Claims (2)

[Claims] 1. A first tray part disposed and used in water, a hanging support part for hanging and supporting the first tray part, and an engaging part provided at an upper end part of the hanging support part. The first saucer portion is formed in a spiral shape with a wire-like elastic member and the central portion thereof is projected somewhat downward, and at a predetermined interval above the first saucer portion, And a second saucer portion whose part is locked to the hanging support portion, wherein the second saucer portion is formed by a wire-like elastic member in a spiral shape and a central portion thereof is projected somewhat upward,
A jig for measuring specific gravity, characterized in that an opening is provided at the center of the second tray. 2. The jig for specific gravity measurement according to claim 1, wherein the wire rod of the wire-shaped elastic member forming the second tray has a cross-sectional shape in an elliptical shape that is vertically long in the vertical direction. .