JPH05281169A - Thermobalance apparatus - Google Patents

Abstract

PURPOSE:To improve measuring accuracy by preventing the rolling of supporting rods. CONSTITUTION:The tip parts of two supporting rods 11 and 12 are located in a furnace 15. A sample to be measured and a standard sample are held at the tip parts. The supporting rods 11 and 12 are vertically moved in the reverse direction to each other in response to the change in mass of the sample to be measured. A balance rod 16 supports one point of each of the supporting rods 11 and 12 so that the rods are freely oscillated. The balance rod 16 allows the vercial movement of the supporting rods 11 and 12 caused by the change in mass of the sample to be measured. Supporting wires 17 and 18 support the base-end parts of the supporting rods 11 and 12 so as to allow the vertical movement of the supporting rods 11 and 12. This apparatus is constituted of these parts. The supporting wires 17 and 18 are constituted of two pieces of wire parts 17A and 17B and 18A and 18B, respectively. The supporting wires support the supporting rods 11 and 12 from the right and left directions so as to allow the vertical movement of the supporting rods 11a and 12 and so as to regulate the right and left movement. As a result, the oscillations of the supporting rods in front and rear and right and left are regulated, and the precise measurement can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermobalance device for measuring a change in mass of a sample to be measured due to heat, and more particularly to a thermobalance device for preventing rolling which deteriorates measurement accuracy.

[0002]

2. Description of the Related Art Generally, a thermobalance device having a structure as shown in FIG. 2 is known.

Reference numerals 1 and 2 in the figure denote support rods for holding a sample to be measured and a standard sample, respectively. Each of the supporting rods 1 and 2 is formed in a crank shape as a whole, and sample tips 3 and 4 for holding a sample to be measured and a standard sample are provided at the tip end (upper end in the figure) of each. The sample pans 3 and 4 are located in the heating furnace 5, and the sample to be measured and the standard sample are heated under the same conditions. The support rods 1 and 2 are supported by a balance rod 6. The balance rod 6 has support rods 1 and 2 at its left and right ends.
2 is supported, and its central portion is supported on the base side of the device. As a result, the support rods 1 and 2 swing and the balance rod 6 itself also swings, and when there is a change in mass between the sample to be measured and the standard sample housed in the sample pans 3 and 4, the support rod 1 ，
2 moves upside down.

Wires 7 and 8 are attached to the base ends (lower ends in the figure) of the support rods 1 and 2, respectively. The wires 7 and 8 are attached one by one, one end of which is fixed to the base ends of the support rods 1 and 2, and the other end of which is fixed to the base side of the device. The wires 7 and 8 allow the support rods 1 and 2 to move in the vertical direction, and regulate the swing in the front-back direction (the direction of arrow 9 in the drawing).

[0005]

However, in the above-mentioned conventional thermobalance device, the vertical movement of each of the support rods 1 and 2 is allowed in a state in which the wires 7 and 8 restrict the swing in the front-back direction. However, since the wires 7 and 8 are only provided one by one, it is not possible to regulate the swing in the lateral direction (the direction perpendicular to the drawing), which causes a problem that the measurement accuracy decreases. is there.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a thermobalance device in which the rolling of the support rod is reliably prevented and the measurement accuracy is improved.

[0007]

In order to solve the above-mentioned problems, a tip portion is located in a furnace, and a sample to be measured and a standard sample are respectively held at the tip portion, and the sample to be measured is changed according to the change in mass. Two support rods that move in opposite directions to each other, a balance unit that swingably supports one point of each of the support rods, and allows the vertical movement of the two support rods due to a change in the mass of the sample to be measured, and the support A thermobalance device consisting of a wire for allowing the rod to move up and down and supporting the rod from the left and right directions with respect to the support rod so as to allow the rod to move up and down and regulate the left and right movements. It is characterized in that a plurality of them are arranged.

[0008]

With the above structure, the supporting rod is supported by the plurality of wires while the movement of the supporting rod in the front-rear direction and the left-right direction is restricted. As a result, the support rod is restricted from swinging back and forth and to the left and right, and is allowed to move only up and down to enable precise measurement.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

First, the first embodiment will be described. FIG. 1 is a schematic perspective view showing a thermobalance device according to a first embodiment. The overall configuration of this thermobalance device is almost the same as the above-mentioned conventional technique. Reference numerals 11 and 12 in the figure denote support rods for holding the sample to be measured and the standard sample, respectively. This support rod 1
Reference numerals 1 and 12 are formed in a crank shape, and sample pans 13 and 14 are provided at the tips thereof. The sample pans 13 and 14 are located in the heating furnace 15. Reference numeral 16 denotes a balance rod supported on the base side of the apparatus, which supports the support rods 11 and 12, respectively, and supports each support rod 11 when there is a mass change between the sample to be measured and the standard sample in the sample pans 13 and 14. , 12 are allowed to move up and down.

The base ends of the support rods 11 and 12 are
Support wires 17 and 18 are provided for restricting swinging back and forth and left and right while allowing the vertical movement of the support rods 11 and 12. The support wires 17 and 18 are each 2
It is composed of wire portions 17A, 17B and 18A, 18B. These wire portions 17A, 17B and 18
As for A and 18B, one end portion of the two support rods 11 are collectively
It is attached to 12 base ends. The other end of each wire is supported in the left-right direction (direction of arrow 20 in the figure).
It is located on both sides of 12 and is attached to the base side of the device.

With the above configuration, when the sample to be measured contained in the sample dish 13 is heated in the heating furnace 15 and the mass changes, the mass balance between the supporting rod 11 and the supporting rod 12 is lost, and each supporting rod is broken. The rods 11 and 12 move upside down. For example, if the measured sample becomes lighter than the standard sample,
The entire supporting rod 11 including the sample to be measured becomes lighter than the entire supporting rod 12 including the standard sample, and the balance rod 16 rotates to move the supporting rod 11 upward and the supporting rod 12 downward. At this time, the support rods 11 and 12 move up and down, with the wire portions 17A and 17B and 18A and 18B of the support wires 17 and 18 restricting the front and rear and left and right swings.

As a result, the rolling of the support rods 11 and 12 is reliably prevented, and the measurement accuracy of the thermobalance device is greatly improved.

Next, a second embodiment will be described. Figure 3
FIG. 3 is an overall configuration diagram showing a thermobalance device according to a second embodiment.

Reference numerals 21 and 22 in the figure denote support rods for holding a sample to be measured and a standard sample, respectively. This support rod 21,
22 is formed in a crank shape similarly to the first embodiment, and sample pans 23 and 24 are provided at the tip end thereof. The sample pans 23 and 24 are located in the heating furnace 25.

Reference numeral 26 is a balance section. The balance unit 26 swingably supports the support rods 21 and 22 and allows the support rods 21 and 22 to move up and down due to changes in the mass of the sample to be measured. Specifically, it is roughly configured by a first arm portion 28 and a second arm portion 29. The middle portion of the first arm portion 28 is rotatably supported on the base side of the apparatus, and the tip portion rotatably supports the intermediate portion of the support rod 21. The second arm portion 29 is the first arm portion 2.
Similar to 8, the intermediate portion is rotatably supported on the base side of the device, and the tip portion rotatably supports the intermediate portion of the support rod 22. The base ends of the arms 28 and 29 are connected by a wire 30, and when one of the arms 28 and 29 is rotated by vertically moving one of the support rods 21 and 22, the other arm is connected via the wire 30. The parts 29 and 28 are also rotated so that the other support rods 22 and 21 move in the opposite direction to the one support rods 21 and 22.

Between the base ends of the support rods 21 and 22 and the base side of the apparatus, support wires 32 and 33 for connecting them are provided.
Is provided. The supporting wires 32 and 33 are each composed of two wire portions (see FIG. 1) as in the first embodiment.
See)). Each of these wire portions is similar to the wire portions 17A, 17B and 18A, 18B of FIG.
One end thereof is attached together to the base ends of the support rods 21 and 22, and the other end is attached to both sides of the support rods 21 and 22 on both sides of the support rods 21 and 22 and attached to the base side of the apparatus.

With the above-mentioned structure, as in the first embodiment, the supporting rods 21 and 22 are restricted from swinging forward and backward and left and right by two wire portions of the supporting wires 32 and 33, respectively. , Move up and down.

As a result, similarly to the first embodiment, the rolling of the support rods 21 and 22 is reliably prevented, and the measurement accuracy of the thermobalance device is greatly improved.

Next, a third embodiment will be described. Figure 4
[Fig. 8] is a configuration diagram showing a thermobalance device according to a third embodiment.

Reference numerals 41 and 42 in the figure denote support rods for holding the sample to be measured and the standard sample, respectively. This support rod 41,
42 is formed in a crank shape as in the first embodiment, and sample pans 43 and 44 are provided at the tip end thereof. The sample pans 43 and 44 are located in the heating furnace 45.

Reference numeral 46 is a balance section. The balance unit 46 supports the support rods 41 and 42, and allows the support rods 41 and 42 to move up and down due to a change in the mass of the sample to be measured. In particular,
It is roughly configured by a first arm portion 48 and a second arm portion 49. The first arm portion 48 has an intermediate portion (specifically, the first arm portion 4).
8 is rotatably supported by the base side of the apparatus from both ends of 8) and its tip end is rotatably supported by the intermediate portion of the support rod 41. Similarly to the first arm portion 48, the second arm portion 49 rotatably supports an intermediate portion (specifically, a position where the ratio of a to b is the same as that of the first arm portion 48) to the base side of the device. The tip end is rotatably supported by the base end of the support rod 42. The base end portion of the first arm portion 48 and the locking portion 49A of the second arm portion 49 (the position displaced from the pivotal support portion 49B of the second arm portion 49 toward the tip end portion by b) are connected by the wire 50. .. As a result, when one of the support rods 41, 42 moves up and down to rotate one of the arm portions 48, 49, the other arm portion 49, 48 also rotates via the wire 50 and the other support rod 42. , 41 is one support rod 41, 4
It is designed to move in the opposite direction of 2.

A support wire 53 is provided between the base end portion of the support rod 41 and the base side of the apparatus to connect them. The supporting wires 53 are each composed of two wire portions (see FIG. 1) as in the first embodiment.

This wire portion is the wire portion 17 of FIG.
Similar to A, 17B and 18A, 18B, one end of the two is attached together to the base end of the support rod 41, and the other end is located on both sides of the support rod 41 and is located on the base side of the device. It is installed.

Further, a support wire 54 is provided between the intermediate portion of the support rod 42 and the base side of the apparatus to connect them. The supporting wire 54 is composed of two wire portions 54A and 54B, respectively, and is constructed in the same manner as the supporting wire 53.

Reference numeral 56 is a detection rod, 57 is a displacement detector, and the detection rod 56 and the displacement detector 57 are the first arm 4
The rotation amount of 8 (the shift amount of the support rod 41 and the support rod 42) is detected. Reference numeral 58 is a magnet, and 59 is a control coil. The control coil 59 is controlled by an external control circuit (not shown), and the control coil 59 is controlled so that a force such that the displacement of the displacement detector 57 is always zero acts on the magnet 58. Compensation current is applied to. This compensation current is detected as a change in weight.

With the above-mentioned structure, similarly to the first embodiment, the supporting rods 41, 42 are restricted from swinging forward and backward and left and right by the wire portions of the supporting wires 53, 54.
Move up and down. Thereby, the same effect as that of the first embodiment can be obtained.

[0028]

As described above in detail, according to the thermobalance device of the present invention, a plurality of wires are arranged in the lateral direction with respect to the supporting rod so that the lateral movement of the supporting rod is restricted. It becomes possible to reliably prevent the rolling of the support rod that accommodates and supports the measurement sample and the standard sample. This makes it possible to greatly improve the measurement accuracy. Furthermore, since only a plurality of wires are provided, the measurement accuracy can be improved at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a thermobalance device of the present invention.

FIG. 2 is an overall configuration diagram showing a conventional thermobalance device.

FIG. 3 is an overall configuration diagram showing a second embodiment of the present invention.

FIG. 4 is an overall configuration diagram showing a third embodiment of the present invention.

[Explanation of symbols]

11, 12 ... Support rod, 16 ... Balance bar, 17, 18 ... Support wire, 17A, 17B, 18A, 18B ... Wire part.

Claims (1)

[Claims] 1. A support rod having a tip located in a furnace, which holds a sample to be measured and a standard sample respectively, and which moves upside down in response to changes in the mass of the sample to be measured. , A balance part that swingably supports one point of each support rod and allows vertical movement of the two support rods due to a change in mass of a sample to be measured, and a wire that supports the support rods by allowing the vertical movement thereof. A thermobalance device consisting of, wherein the vertical movement of the support rod is allowed and the horizontal movement is restricted,
A thermobalance device comprising a plurality of the wires arranged in the left-right direction with respect to a support rod.