JP3213096U - Sample container holder and electronic balance provided with the same - Google Patents

Abstract

A sample container holder capable of holding various types of sample containers on a weighing pan is provided. A sample container holder 50 is used in an electronic balance including a weighing pan and holds a sample container in which an object to be measured is accommodated on the weighing pan, and includes a plurality of metal wires on a horizontal plane. Each of the metal wires is deformed in the vertical direction by being pressed with a predetermined force or more in the vertical direction, comprising a net-like portion 51 composed of 51a, 51b and a plurality of legs 52 extending downward from the mesh portion. When the pressing is stopped, the deformed shape is maintained. The diameter of the metal wire is 1 mm or more and 3 mm or less, and the material is preferably tin. [Selection] Figure 5

Description

  The present invention relates to a sample container holder and an electronic balance including the sample container holder, and more particularly to a sample container holder used in an electronic balance including a windshield that prevents the influence of airflow.

In a laboratory or the like, an electronic balance is used to weigh an object to be measured such as powder. At this time, the measurer checks the displayed measurement result while placing the object to be measured on the placing surface of the weighing pan formed on the upper surface of the electronic balance using a spatula or spoon (spatula). By doing so, an object to be measured having a target weight is obtained.
By the way, in fields such as the pharmaceutical industry and the chemical industry, various amounts of objects are measured in a laboratory, such as weighing a large amount of objects to be measured or weighing a small amount (for example, 0.1 mg) of an object to be measured. The measurement object is being weighed. At this time, when weighing a small amount of an object to be measured, a very small amount of weighing is extremely important. However, since the air flow in the weighing chamber becomes unstable due to the opening and closing of the door, it takes time to stabilize the measured value. In particular, when weighing objects under the influence of airflow blown out from air conditioning, the weighing pan will shake (vibrate) due to airflow from the air conditioning, and the displayed measurement results will not be determined indefinitely. May fluctuate.

Then, the electronic balance provided with the windshield for preventing the influence of an airflow is disclosed (for example, refer patent document 1).
1 is a plan view showing an example of an electronic balance equipped with a windshield, FIG. 2 is a side view of the electronic balance of FIG. 1 in a closed state, and FIG. 3 is a front sectional view similar to FIG. FIG. 4 is a side view of the door opening state similar to FIG.
The electronic balance 1 includes an electronic balance body 10 having a weighing mechanism, a windshield 20 that prevents the influence of airflow, and a weighing pan 40 with a mounting portion on which an object to be measured is placed.

  The electronic balance body 10 includes a flat housing 10a, a panel portion 10b provided on the front side of the upper surface of the housing 10a, a conical convex portion 10c provided at the center of the upper surface of the housing 10a, and an interior of the housing 10a. A weighing mechanism 10d.

  The weighing pan 40 with a mounting portion has a weighing pan 40a having a circular mounting surface with a diameter D (for example, 8 to 9 cm) when viewed from above, and a mounting formed with a hole formed in the central portion of the lower surface of the weighing pan 40a. Part 40b. Thereby, the weighing pan 40 with an attachment part is attached to the upper surface of the electronic balance main body 10 by inserting the convex part 10c of the electronic balance main body 10 into the hole of the attachment part 40b.

The windshield 20 includes four front side walls 30a made of glass, a rear side wall 30b made of glass, metal or plastic, and four sides formed in parallel with each other between the four corners of the front side wall 30a and the four corners of the rear side wall 30b. A frame (side wall) 30 having a guide pillar portion 30c, a glass square upper opening opening / closing member 21, a glass square right opening opening / closing member 22, and a glass square left opening Part opening / closing member 23.
The four guide pillars 30c are formed with grooves that allow the upper opening / closing member 21, the right opening / closing member 22, and the left opening / closing member 23 to slide in the front-rear direction. When the left and right ends of the upper opening / closing member 21 are inserted, the upper opening / closing member 21 is attached to the upper surface of the frame 30 so as to be movable in the front-rear direction. By inserting the upper and lower ends, the right opening opening / closing member 22 is attached to the right side surface of the frame 30 so as to be movable in the front-rear direction, and the upper and lower ends of the left opening opening / closing member 23 are inserted. Thus, the left opening opening / closing member 23 is attached to the left side surface of the frame 30 so as to be movable in the front-rear direction.
The upper opening / closing member 21 is attached to the upper surface of the frame body 30 to serve as an upper wall.

In addition, a gripping portion 21 a protruding upward is formed on the front portion of the upper surface of the upper opening opening / closing member 21, and a gripping protrusion protruding rightward is formed on the front portion of the right opening of the right opening opening / closing member 22. A portion 22 a is formed, and a grip portion 23 a that protrudes to the left is formed in the front portion of the left side surface of the left opening opening / closing member 23.
Thereby, the measurer can open the upper opening of the frame 30 as shown in FIG. 4 by grasping the grip 21a by hand and sliding the upper opening / closing member 21 backward, as shown in FIG. As shown, the upper opening can be closed by sliding it forward. Further, by grasping the grip portion 22a by hand and sliding the right opening opening / closing member 22 backward, the right opening portion of the frame body 30 is opened as shown in FIG. 4, or the forward opening as shown in FIG. The right opening can be closed by sliding it to the right. Further, by grasping the grip portion 23a by hand and sliding the left-side opening opening / closing member 23 backward, the left-side opening portion of the frame 30 is opened, or by sliding forward, the left-side opening portion is closed. Can be done.

  By mounting such a windshield 20 on the electronic balance body 10 from above, the weighing pan 40 with a mounting portion is disposed inside the windshield 20. Then, the measurer grasps the object to be measured using a spatula or a spoon at the center of the mounting surface of the weighing pan 40b by holding the grip 22a or the like and sliding it backward to open the right opening. After placing and placing the object to be measured on the weighing pan 40b, the gripping portion 22a and the like are grasped by hand and slid forward to close the right opening and the like, thereby displaying the measurement displayed on the panel portion 10b. Check the results.

  By the way, in the weighing measurement when the object to be measured is a liquid or the like, the test object or the flask placed on the placing surface of the weighing dish 40a is not placed on the placing surface of the weighing dish 40a. An object to be measured may be accommodated in the (sample container). At this time, a sample container holder for tilting a test tube or flask serving as a sample container and holding it on the mounting surface of the weighing pan 40a is used.

  By using the sample container holder, the mouth of the sample container such as a test tube or flask is arranged near the right opening and the distance to the sample container is reduced, so that a pipette or the like is held inside the windshield 20. Thus, the object to be measured can be easily accommodated in the sample container without putting a hand.

Japanese Patent Laid-Open No. 9-43041

However, it is necessary to prepare a sample container holder that matches the shape of the sample container to be used. When using various types of sample containers, a sample container holder must be prepared for each sample container. There was a problem that the cost was increased.
SUMMARY OF THE INVENTION An object of the present invention is to provide a sample container holder that can hold various types of sample containers on a weighing pan and an electronic balance including the sample container holder.

  A sample container holder of the present invention made to solve the above problems is used in an electronic balance equipped with a weighing pan, and a sample for holding a sample container in which an object to be measured is stored on the weighing pan. A container holder, comprising a mesh portion made of a plurality of metal wires on a horizontal plane and a plurality of legs extending downward from the mesh portions, each metal wire being pressed in a vertical direction with a predetermined force or more. Thus, when it is deformed in the vertical direction and is stopped from being pressed with a predetermined force or more, the deformed shape is maintained.

  Here, the “predetermined force” is an arbitrary force determined in advance by a designer or the like, and is an amount of force that can be deformed by a measurer or the like without being deformed by the weight of the sample container.

  As described above, according to the sample container holder of the present invention, the shape can be easily changed, and various sample containers can be held by one sample container holder.

(Means and effects for solving other problems)
In the above device, the diameter of the metal wire may be 1 mm or more and 3 mm or less.

In the above device, the sample container may be a test tube or a flask.
In the present invention, the mesh portion may include a plurality of vertical metal wires and a plurality of horizontal metal wires.

  The electronic balance of the present invention is provided downward from the sample container holder, the weighing pan, the electronic balance body having the weighing mechanism, the upper wall, and the peripheral portion of the upper wall. And a windshield in which an opening and an opening / closing member capable of opening and closing the opening are formed, and the windshield is placed on the electronic balance body from above. Thus, a weighing pan may be arranged inside the windshield.

The top view which shows an example of an electronic balance provided with a windshield. The side view of the closed state in the electronic balance of FIG. Front sectional view similar to FIG. The side view of the door open state similar to FIG. The perspective view which shows an example of the sample container holder which concerns on 1st embodiment of this invention. Front sectional drawing which shows the electronic balance at the time of hold | maintaining an Erlenmeyer flask with the sample container holder of this invention. Front sectional drawing similar to FIG. 6 when a round bottom flask is used. The perspective view which shows an example of the sample container holder which concerns on 2nd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments described below, and it goes without saying that various aspects are included without departing from the spirit of the present invention.

<First embodiment>
The electronic balance 1 includes an electronic balance body 10 having a weighing mechanism, a windshield 20 that prevents the influence of airflow, a weighing pan 40 with a mounting portion on which an object to be measured is placed, and a sample container holder 50. .

FIG. 5 is a perspective view showing an example of a sample container holder according to the first embodiment of the present invention.
The sample container holder 50 includes a net-like portion 51 that is quadrangular in plan view, and (M + N−4) leg portions 52 that extend downward from the peripheral edge of the square net-like portion 51.

The net-like portion 51 extends in the vertical direction and has N vertical metal wires 51a arranged in the horizontal direction with a predetermined interval, and M horizontal directions extending in the horizontal direction and arranged in the vertical direction with a predetermined interval. It is an M-row N-column network composed of metal lines 51b.
The predetermined interval is an arbitrary interval determined in advance by a designer or the like, and is an interval at which sample containers S and S ′ described later can be placed and deformed, and is 0.5 cm or more and 2 cm or less. It is preferable.

The legs 52 extend downward by a predetermined distance from both ends of the N vertical metal wires 51a and both ends of the M horizontal metal wires 51b (peripheral edges of the square mesh portion 51) (M + N-4). ) Book metal wire.
The predetermined distance is preferably 0.5 cm or more and 2 cm or less.

And it is preferable that the diameter of the said metal wire is 1 mm or more and 3 mm or less, As a material of the said metal wire, tin etc. are mentioned, for example.
According to such a net-like part 51 and the leg part 52, it can be deformed by being pressed by a measurer's hand with a predetermined force or more, and it is deformed when the pressing with a predetermined force or more is stopped. The shape can be maintained.

Next, a method for using the sample container holder 50 according to the present invention will be described.
(1) When using an Erlenmeyer flask as a sample container (see FIG. 6)
First, the measurer presses a predetermined position in the mesh portion 51 of the sample container holder 50 downward by hand, thereby forming an inverted triangular recess in a side view. Next, the measurer places the Erlenmeyer flask S serving as the sample container in the inverted triangular recess of the mesh part 51 of the sample container holder 50. Next, the measurer grasps the grip 22a of the electronic balance 1 with his / her hand and slides it backward to open the right opening and the like so that the lower end of the leg 52 is placed on the mounting surface of the weighing pan 40a. Place the sample container holder 50 on which the Erlenmeyer flask S is held. At this time, the mouth of the Erlenmeyer flask S is arranged in the vicinity of the right opening.

  Then, the measurer uses a pipette or the like to store the object to be measured in the Erlenmeyer flask S, and after storing the object to be measured, the gripper 22a or the like is gripped by the hand and slid forward to open the right opening. Etc., and the measurement result displayed on the panel unit 10b is confirmed.

(2) When a round bottom flask is used as a sample container (see FIG. 7)
First, the measurer presses a predetermined position in the mesh portion 51 of the sample container holder 50 downward by hand to form a hemispherical concave portion in a side view. Next, the measurer places the round bottom flask S ′ in the hemispherical concave portion of the mesh portion 51 of the sample container holder 50. Next, the measurer grasps the grip 22a of the electronic balance 1 with his / her hand and slides it backward to open the right opening and the like so that the lower end of the leg 52 is placed on the mounting surface of the weighing pan 40a. Place the sample container holder 50 on which the round bottom flask S ′ is held. At this time, the mouth of the round bottom flask S ′ is arranged in the vicinity of the right opening.

  Then, the measurer uses a pipette or the like to store the object to be measured in the round bottom flask S ′, and after storing the object to be measured, grips the gripping part 22a by hand and slides it forward to the right side. By closing the opening or the like, the measurement result displayed on the panel portion 10b is confirmed.

  As described above, according to the sample container holder 50 of the present invention, the shape can be easily changed, and sample containers of various shapes such as the Erlenmeyer flask S and the round bottom flask S ′ can be obtained with one sample container holder 50. Can be held.

<Second embodiment>
FIG. 8 is a perspective view showing an example of a sample container holder according to the second embodiment of the present invention.
The sample container holder 60 includes a net-like portion 61 that is circular in plan view, and four leg portions 62 that extend downward from the peripheral edge of the circular net-like portion 61.

  The mesh portion 61 has the same center, and is a mesh composed of N annular metal wires 61a having different radii from the center and M transverse metal wires 61b extending in the circumferential direction from the center. It is a body. The method for installing the sample containers S and S 'is as described above.

  As described above, according to the sample container holder 60 of the present invention, the shape can be easily changed, and sample containers of various shapes such as the Erlenmeyer flask S and the round bottom flask S ′ can be obtained with one sample container holder 60. Can be held.

  The present invention can be used for an electronic balance equipped with a windshield that prevents the influence of airflow.

DESCRIPTION OF SYMBOLS 1 Electronic balance 40 Weighing pan 50 Sample container holder 51 Net-like part 51a Longitudinal metal wire 51b Lateral metal wire 52 Leg part S Sample container

Claims (5)

Used for electronic balances equipped with weighing pans,
A sample container holder for holding a sample container in which an object to be measured is stored on the weighing pan,
A net-like portion composed of a plurality of metal wires on a horizontal plane;
A plurality of legs extending downward from the mesh portion;
Each metal wire is deformed in the vertical direction by being pressed in the vertical direction with a predetermined force or more, and when it is stopped being pressed with the predetermined force or more, the deformed shape is maintained. A sample container holder.   The diameter of the said metal wire is 1 mm or more and 3 mm or less, The sample container holder of Claim 1 characterized by the above-mentioned.   The sample container holder according to claim 1 or 2, wherein the sample container is a test tube or a flask. The mesh portion includes a plurality of vertical metal wires,
The sample container holder according to any one of claims 1 to 3, further comprising a plurality of lateral metal wires. The sample container holder according to any one of claims 1 to 4,
The weighing pan;
An electronic balance body having a weighing mechanism;
A windshield having an upper wall and a side wall provided downward from the peripheral edge of the upper wall, and an opening and an opening opening / closing member capable of opening and closing the opening are formed on the side wall. And
An electronic balance characterized in that a weighing pan is disposed inside the windshield by placing the windshield on the electronic balance body from above.

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