JP2022018644A - Moisture permeability measuring device - Google Patents

Abstract

To provide a moisture permeability measuring device for preventing a malfunction due to moisture of an actuator.SOLUTION: A moisture permeability measuring device includes: a housing having a constant temperature constant humidity chamber and an auxiliary chamber therein that communicates with the constant temperature and humidity chamber through a communication hole; an adjusting unit for adjusting humidity and temperature of the constant temperature and humidity chamber; a container supporting unit for supporting the container so that a container housing a measuring target is positioned in the constant temperature and humidity chamber and having an opening and closing unit; a weight measuring unit for measuring weight of the measuring target through the container supporting unit; and an elevation mechanism that vertically raises and lowers the container together with the container supporting unit to cause the container supporting unit to move away from the weight measuring unit and cause the opening/closing unit to close the communication hole at the time of raising and that places the container supporting unit on the weight measuring unit to make it into a weight measurable state and causes the opening/closing unit to open the communication hole at the time of lowering. The elevation mechanism is arranged so as to straddle from an inside of the auxiliary chamber to an outside of the auxiliary chamber.SELECTED DRAWING: Figure 3

Description

The present invention relates to a moisture permeability measuring device for measuring the moisture permeability of an object to be measured.

As a device for measuring the moisture permeability of a material such as a film, for example, a balance unit that measures the sample weight with a leg-length mounting plate placed on a weighing plate, a constant temperature and humidity chamber, a moist air generator, and a recording analysis unit. A water vapor transmission rate and mass change measuring device composed of the above has been proposed (see, for example, Patent Document 1). The leg length installation dish has a leg that is placed on the weighing dish of the balance section through a through hole made in the bottom plate of the constant temperature and humidity chamber. Further, a positioning cap is provided on the leg portion. Further, the leg length installation dish is moved up and down in the vertical direction by an actuator arranged inside the constant temperature and humidity chamber or the support base. Then, when the leg length installation dish is raised, the positioning cap fits into the through hole to close the through hole and seals the constant temperature and humidity chamber. The moisture permeability of the sample is measured in a constant temperature and humidity chamber in this state.

Japanese Unexamined Patent Publication No. 2019-74418

In the water vapor transmission rate and mass change measuring device, the actuator is arranged inside a constant temperature and humidity chamber or a support base. The humidity of the constant temperature and humidity chamber is set high, and the inside of the support base also communicates with the constant temperature and humidity chamber through the through hole, so that the humidity is high. Placing an electrically driven actuator in a humid place may cause a malfunction.

In view of such circumstances, the present invention is intended to provide a moisture permeability measuring device for preventing a failure due to moisture of an actuator.

The present invention is for solving the above-mentioned problems, and the moisture permeation measuring device of the present invention is located in a constant temperature and humidity chamber and below the constant temperature and humidity chamber, and has itself and the constant temperature and humidity chamber. A housing having an auxiliary chamber inside that communicates with the constant temperature and humidity chamber through a communication hole provided in the boundary wall, a humidity control unit that adjusts the humidity of the constant temperature and humidity chamber, and the temperature of the constant temperature and humidity chamber. A container support section having a temperature control section for adjusting, a container support section having an opening / closing section for opening / closing the communication hole, and a container support section for supporting the container so that the container for accommodating the object to be measured is located in the constant temperature / humidity chamber. A weight measuring unit that is located on the lower side of the unit and measures the weight of the object to be measured through the container support unit, and the container is moved up and down together with the container support unit. The communication hole is closed in the opening / closing part while being separated from the measuring part, and the container support part is placed on the weight measuring part at the time of lowering so that the weight can be measured, and the communication hole is provided in the opening / closing part. The elevating mechanism is provided with an elevating mechanism for opening, and the elevating mechanism is arranged so as to extend from the inside of the auxiliary chamber to the outside of the auxiliary chamber.

Further, in the moisture permeability measuring device of the present invention, the elevating mechanism has an electric drive unit that generates power by electricity and a power transmission unit that transmits the power of the electric drive unit, and at least the power transmission unit. A part thereof is arranged inside the auxiliary chamber, and the electric drive unit is arranged outside the auxiliary chamber.

Further, in the moisture permeability measuring device of the present invention, the electric drive unit is a motor, and the power transmission unit includes a pressing member provided so as to be able to press the container support unit upward, and the rotation of the motor. It has a drive shaft that rotates by transmitting power, and a conversion unit that converts the rotation of the drive shaft into an up-and-down movement of the pressing member along the vertical direction. When the pressing member rises, the container When the support portion is pressed to raise the container support portion and the pressing member is lowered, the container support portion is lowered, and the pressing member, at least a part of the drive shaft, and the conversion portion are provided in the auxiliary chamber. It is characterized by being placed in.

Further, in the moisture permeability measuring device of the present invention, the opening / closing portion has a lid portion that can cover and close the communication hole, and the surface of the boundary wall on the auxiliary chamber side and the upper surface of the lid portion. An annular sealing member surrounding the communication hole is arranged between them.

Further, in the moisture permeability measuring device of the present invention, an annular concave surface for holding the sealing member is formed on at least one of the surface on the auxiliary chamber side or the upper surface of the lid portion of the boundary wall. ..

Further, in the moisture permeability measuring device of the present invention, the contact portion between the power transmission unit and the container support portion and / or the contact portion between the container support portion and the housing is preliminarily attached to the contact portion between the container support portion and the housing with the constant temperature and humidity chamber as a reference. It is characterized by comprising a centering mechanism for centering the container support portion deviated from the set reference center position to the reference center position.

Further, in the moisture permeability measuring device of the present invention, the centering mechanism includes a centering convex portion provided on the power transmission portion, a centering hole provided on the container support portion side and receiving the centering convex portion. The centering convex portion and / or the centering hole is characterized in that a tapered surface for guiding to the reference center position is formed.

Further, in the moisture permeability measuring device of the present invention, the temperature adjusting unit includes a Pelche element, and the Pelche element heats and cools the outer wall of the constant temperature and humidity chamber.

Further, in the moisture permeability measuring device of the present invention, the humidity adjusting unit includes a steam generating unit that generates water vapor, a steam supply pipe that is connected to the constant temperature and humidity chamber and supplies the steam to the constant temperature and humidity chamber. A moisture absorbing portion made of a material capable of absorbing the liquefied moisture of the steam supplied from the steam supply pipe is provided in the constant temperature and humidity chamber.

Further, the moisture permeability measuring device of the present invention is characterized by including a blower unit that blows water vapor inside the constant temperature and humidity chamber in the horizontal direction.

According to the moisture permeability measuring device of the present invention, it is possible to obtain an excellent effect that a failure due to moisture of the actuator can be prevented.

It is a front side perspective view of the moisture permeability measuring apparatus in embodiment of this invention. It is a back side perspective view of the moisture permeability measuring apparatus in embodiment of this invention. (A) is a cross-sectional view taken along the line AA of the moisture permeability measuring device in FIG. (B) is a plan view of a constant temperature / humidity constant chamber of the moisture permeability measuring device according to the embodiment of the present invention. The upper part of (A) is an enlarged sectional view near the boundary between the constant temperature and humidity chamber and the first auxiliary chamber of the moisture permeability measuring device according to the embodiment of the present invention, and the lower part is the upper side of the upper part in the vertical direction. It is a plan view when viewed from the plan view. (B) is an enlarged cross-sectional view of a state in which a pressing member, an opening / closing portion, and a boundary wall of the moisture permeability measuring device according to the embodiment of the present invention are separated from each other. FIG. 3 is a cross-sectional view taken along the line BB of the moisture permeability measuring device in FIG. (A) and (B) are cross-sectional views in which the operation of the elevating mechanism of the moisture permeability measuring device according to the embodiment of the present invention is arranged in chronological order. (A) and (B) are cross-sectional views in which the operation of the elevating mechanism of the moisture permeability measuring device according to the embodiment of the present invention is arranged in chronological order. (A) is a figure which shows the state which detected the completion of ascending of the container support part in the position detection part of the moisture permeation measuring apparatus in embodiment of this invention. (B) is a figure which shows the photo sensor of the moisture permeation measuring apparatus in embodiment of this invention. (C) is a figure which shows the state which has detected that the container support part has been lowered by the position detection part of the moisture permeation measuring apparatus in embodiment of this invention. (A) to (C) are cross-sectional views in which the container support portion is centered at the center position in chronological order by the centering mechanism of the moisture permeability measuring device according to the embodiment of the present invention. (A) to (C) are sectional views of a modification of the centering mechanism of the moisture permeability measuring device according to the embodiment of the present invention. It is a perspective view of the state which covered the device cover with the moisture permeability measuring device in embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 11 are examples of embodiments of the present invention, in which the parts with the same reference numerals as those in FIG. 1 represent the same objects, and the basic configuration is the same as that of the conventional one shown in the drawings. be.

<Overall configuration>
With reference to FIGS. 1 to 3, the moisture permeability measuring device 1 according to the embodiment of the present invention measures the moisture permeability of the object to be measured. As shown in FIG. 3A, the moisture permeability measuring device 1 includes a housing 2, a humidity adjusting unit 3, a temperature adjusting unit 4, a container support unit 5, a weight measuring unit 6, and an elevating mechanism 7. A centering mechanism 8 and a control unit 9 are provided.

<Case>
As shown in FIGS. 1 to 3, the housing 2 has a constant temperature and humidity chamber 20, a first auxiliary chamber 21, and a second auxiliary chamber 22 inside. The constant temperature and humidity chamber 20, the first auxiliary chamber 21, and the second auxiliary chamber 22 are arranged in the vertical direction V in order from the upper side. The vertical direction V is parallel to the vertical direction. The constant temperature and humidity chamber 20 is a room in which the temperature and humidity are kept constant. As shown in FIGS. 3A and 3B, the constant temperature and humidity chamber 20 accommodates a container 100 for accommodating the measurement object 130. Examples of the object to be measured 130 include packaging materials for the purpose of moisture proofing such as plastic film and processed paper.

The container 100 preferably satisfies the conditions of the "permeation humidity test method for moisture-proof packaging material" (cup method: JIS Z 0208) defined by Japanese Industrial Standards. As shown in FIG. 3, the container 100 contains calcium chloride (anhydrous) 120 (CaCl ₂ ), and the object to be measured 130 is set above the calcium chloride (anhydrous) 120. The particle size of calcium chloride (anhydrous) 120 meets the conditions of the "permeation humidity test method for moisture-proof packaging material".

<First auxiliary room>
As shown in FIGS. 1 to 3, the first auxiliary room 21 is a room adjacent to the constant temperature and humidity chamber 20 in the vertical direction V, and is located below the constant temperature and humidity chamber 20. A communication hole 24 is provided in the boundary wall 23 between the constant temperature and humidity chamber 20 and the first auxiliary chamber 21. The constant temperature and humidity chamber 20 communicates with the first auxiliary chamber 21 through the communication hole 24.

Further, the boundary wall 23 has an annular concave surface 27 as shown in FIG. 3 (A). As shown in the upper view of FIG. 4A, the annular concave surface 27 forms a part of the ceiling surface 21A of the first auxiliary chamber 21, which is the surface of the boundary wall 23 on the first auxiliary chamber 21 side, and forms the boundary wall. It is dented toward the upper side in the thickness direction (vertical direction V) of 23. Then, as shown in the lower diagram of FIG. 4A, the annular concave surface 27 is an annular surface and surrounds the communication hole 24 along the ceiling surface 21A.

The communication hole 24 penetrates the central region of the boundary wall 23 in the vertical direction V. The communication hole 24 is closed by the opening / closing portion 52, which will be described later, while the moisture permeability of the object to be measured 130 is being measured. As a result, the constant temperature and humidity chamber 20 is shut off from the first auxiliary chamber 21 and is in a sealed state.

<Second auxiliary room>
As shown in FIGS. 1 to 3, the second auxiliary room 22 is a room adjacent to the first auxiliary room 21 in the vertical direction V, and is located on the lower side of the first auxiliary room 21. The boundary wall 25 between the first auxiliary chamber 21 and the second auxiliary chamber 22 is provided with three communication holes 26. Since FIG. 3A is a cross-sectional view, only two communication holes 26 are drawn, but in reality, there is another communication hole 26 on the front side of the paper. The first auxiliary chamber 21 communicates with the second auxiliary chamber 22 through three communication holes 26. The three communication holes 26 are for passing the three support legs 53 of the container support portion 5, which will be described later.

<Humidity adjustment unit>
The humidity adjusting unit 3 adjusts the humidity of the constant temperature and humidity chamber 20. As shown in FIG. 3A, the humidity adjusting unit 3 includes, for example, a container 30, a heating unit 31, a plug unit 32, a water supply unit 33, an air supply unit 34, a steam supply unit 35, and humidity. It has a measuring unit 36, a blowing unit 37, and a moisture absorbing unit 38. The container 30, the heating unit 31, the plug unit 32, the water supply unit 33, and the air supply unit 34 form a steam generation unit that generates steam.

Water is supplied to the container 30 through the water supply unit 33. The heating unit 31 heats the water in the container 30. In the present embodiment, as shown in FIG. 3A, the heating unit 31 is composed of a heater installed on the bottom surface of the container 30 and heats the water inside the container 30 from the outside bottom surface side of the container 30.

As shown in FIG. 3A, the plug portion 32 plugs and closes the opening 30A of the container 30. The plug portion 32 is formed in a columnar or partial cone shape. The plug portion 32 has holes 321 to 323 that penetrate the plug portion 32 in the vertical direction V. The hole 321 is for passing the water supply pipe 331 described below. The hole 322 is for passing the air supply pipe 342 described below. The hole 323 is for passing the steam supply pipe 351 described below.

The water supply unit 33 is for supplying water from the outside of the container 30 to the inside of the container 30. As shown in FIG. 3A, the water supply unit 33 includes a funnel 330, a water supply pipe 331, and a water supply side opening / closing unit 332. A water supply pipe 331 is connected to the funnel 330. The tip of the water supply pipe 331 extends to the inside of the container 30 through the hole 321 of the plug portion 32. When water is poured from the funnel 330, the water enters the container 30 through the water supply pipe 331. The water supply side opening / closing unit 332 opens / closes the water supply unit 33. When the water supply unit 33 is closed by the water supply side opening / closing unit 332, the communication between the inside and the outside of the container 30 is cut off, and when the water supply unit 33 is opened by the water supply side opening / closing unit 332, the inside and the outside of the container 30 communicate with each other. The water supply side opening / closing portion 332 is composed of, for example, a lid of the funnel 330, a plug of the water supply pipe 331, or a valve for opening / closing the water supply pipe 331.

The air supply unit 34 supplies air to the water in the container 30. As a result, the water inside the container 30 is whipped and easily vaporized. As shown in FIG. 3A, the air supply unit 34 includes a pump 341, an air supply pipe 342, and an air side opening / closing unit 343. An air supply pipe 342 is connected to the pump 341. The tip of the air supply pipe 342 extends into the water of the container 30 through the hole 322 of the plug portion 32. The air sent from the pump 341 is supplied into the water through the air supply pipe 342. The air side opening / closing unit 343 opens / closes the air supply unit 34. The air-side opening / closing portion 343 is composed of, for example, a valve included in the pump 341.

The steam supply unit 35 supplies the steam in the container 30 to the constant temperature and humidity chamber 20. The humidity of the constant temperature and humidity chamber 20 is adjusted by the supply of steam. As shown in FIG. 3A, the steam supply unit 35 includes a steam supply pipe 351 and a steam side opening / closing unit 352. One end side of the steam supply pipe 351 is passed through the hole 322 of the plug portion 32, and the other end side is connected to the constant temperature and humidity chamber 20. The steam inside the container 30 is supplied to the constant temperature and humidity chamber 20 from the discharge port 353 of the steam supply pipe 351 through the steam supply pipe 351. The steam side opening / closing unit 352 opens / closes the steam supply unit 35. When the steam supply unit 35 is closed by the steam side opening / closing unit 352, the communication between the inside of the container 30 and the constant temperature / humidity chamber 20 is cut off, and when the steam supply unit 35 is opened by the steam side opening / closing unit 352, the inside of the container 30 and the constant temperature are constant temperature. The constant humidity chamber 20 communicates with each other. When supplying the water vapor inside the container 30 to the constant temperature and humidity chamber 20, it is preferable that the water supply side opening / closing unit 332 blocks the communication between the outside and the inside of the container 30 through the water supply unit 33.

According to the conditions of the "permeation humidity test method for moisture-proof packaging material" (cup method: JIS Z 0208) defined by Japanese Industrial Standards, the humidity of the constant temperature and humidity chamber 20 needs to be 90%. Therefore, as shown in FIGS. 3A and 3B, a humidity measuring unit 36 for measuring the humidity of the constant temperature and humidity chamber 20 is provided in the constant temperature and humidity chamber 20. The measurement result of the humidity measuring unit 36 is transmitted to the control unit 9. The control unit 9 opens and closes the steam side opening / closing unit 352 according to the measurement result of the humidity measuring unit 36 to keep the humidity of the constant temperature / humidity chamber 20 at 90%.

The blower unit 37 blows the water vapor inside the constant temperature and humidity chamber 20 in the horizontal direction. The blower portion 37 is composed of a fan 370. As shown in FIG. 3B, the front side of the fan 370 faces the container 100, and the back side of the fan 370 faces the discharge port 353 of the steam supply pipe 351. In this case, the fan 370 blows water vapor in the horizontal direction toward the container 100.

When the air is blown horizontally toward the container 100 by the fan 370, the air is reflected on the constituent surfaces of the container 100 and the constant temperature and humidity chamber 20 around the container 100, and the air is reflected on the container 100 and the measurement as shown in FIG. 3 (B). Air circulates around the object 130 (see the thick arrow in FIG. 3B). As a result, air convection occurs around the container 100 and the object to be measured 130. As a result, the temperature and humidity of the constant temperature and humidity chamber 20 are made uniform, and the temperature and humidity of the constant temperature and humidity chamber 20 become constant.

As shown in FIGS. 3A and 3B, the moisture absorbing portion 38 is made of a material that absorbs moisture, and is, for example, the discharge port 353 of the steam supply pipe 351 in the constant temperature and humidity chamber 20. It is placed directly below (behind the fan 370). When steam is supplied from the steam supply pipe 351, water droplets liquefied from the steam drips from the discharge port 353 of the steam supply pipe 351, and the water droplets are accumulated in the constant temperature and humidity chamber 20. The water absorbing unit 38 absorbs the liquefied water (water droplets). The location of the moisture absorbing portion 38 is not limited to directly below the discharge port 353 (behind the fan 370), and may be another location in the constant temperature and humidity chamber 20. Examples of the material that absorbs moisture include sponges, cloths, and non-woven fabrics. Further, the moisture absorbed by the moisture absorbing portion 38 is efficiently vaporized by the air flow in the constant temperature and humidity chamber 20 generated by the blowing air of the fan 370.

<Temperature control unit>
The temperature adjusting unit 4 adjusts the temperature of the constant temperature and humidity chamber 20. As shown in FIGS. 1 and 2, the temperature adjusting unit 4 has a Pelche element 40, a heat sink 41, and a fan 42. The Pelche element 40 is provided so as to be in contact with the heat receiving surface 41A of the heat sink 41. The heat sink 41 has fins 41B on the side opposite to the heat receiving surface 41A. The fan 42 is arranged on the fin 41B side of the heat sink 41, and blows air from the fin 41B toward the heat receiving surface 41A. The temperature adjusting unit 4 is fixed to the housing 2 in a state where the Pelche element 40 is in contact with the outer wall 2A of the constant temperature and humidity chamber 20 of the housing 2.

According to the conditions of the "permeation humidity test method for moisture-proof packaging material" (cup method: JIS Z 0208) defined by Japanese Industrial Standards, the temperature of the constant temperature and humidity chamber 20 needs to be 40 degrees. Therefore, as shown in FIGS. 3A and 3B, a temperature measuring unit 43 for measuring the temperature of the constant temperature and humidity chamber 20 is provided in the constant temperature and humidity chamber 20. The measurement result of the temperature measuring unit 43 is transmitted to the control unit 9. The control unit 9 controls the Pelche element 40 according to the measurement result of the temperature measurement unit 43, and keeps the temperature of the constant temperature and humidity chamber 20 at 40 degrees. Specifically, the Pelche element 40 heats and / or cools the outer wall 2A of the constant temperature and humidity chamber 20 under the control of the control unit 9 to keep the temperature of the constant temperature and humidity chamber 20 at 40 degrees. In the present embodiment, the humidity measuring unit 36 and the temperature measuring unit 43 are composed of temperature / humidity sensors having both functions, but the present invention is not limited to this, and the humidity measuring unit 36 and the temperature measuring unit 43 are composed of separate sensors independent of each other. May be done.

<Container support>
As shown in FIG. 3A, the container support portion 5 supports the container 100 so that the container 100 is located in the constant temperature and humidity chamber 20. As shown in FIG. 5, the container support portion 5 has a container-side support base 50, a support pillar 51, an opening / closing portion 52, a support leg portion 53, and a leg-side support base 54.

As shown in FIG. 5, the container-side support base 50 has a mounting surface 50A on which the container 100 is placed. The container-side support base 50 supports the container 100 mounted on the mounting surface 50A. The support column 51 is a tubular tube member that supports the container-side support base 50. The support pillar 51 is connected to the container-side support base 50 in the central region of the container-side support base 50 on one end side, passes through the communication hole 24, and is connected to the opening / closing portion 52 on the other end side.

The opening / closing portion 52 opens / closes the communication hole 24. The opening / closing portion 52 is connected to the support pillar 51 in the central region of the opening / closing portion 52. Specifically, the opening / closing portion 52 has a lid portion 520 and a sealing member 521, as shown in the upper view of FIG. 4A. The lid portion 520 is formed in a plate shape, for example, and has a shape and size that can cover and close the communication hole 24. The lid portion 520 is connected to the support column 51. Further, the lid portion 520 has a lid side hole 523 that penetrates in the thickness direction of the lid portion 520. The lid side hole 523 constitutes a part (centering hole) of the centering mechanism 8 described later.

As shown in the upper view of FIG. 4A, the seal member 521 is convex starting from the upper surface 520A facing the communication hole 24 side (upper side) of the lid portion 520, and is connected in an annular shape to the boundary wall 23. It is configured to be insertable on the annular concave surface 27. The seal member 521 is composed of, for example, an annular packing having a substantially circular cross section. When the packing serving as the sealing member 521 is pressed against the annular concave surface 27, the packing surrounds the communication hole 24 and cooperates with the lid portion 520 to close the communication hole 24 from the first auxiliary chamber 21 side. That is, the sealing member 521 and the annular concave surface 27 form a sealing mechanism that closes the communication hole 24 and seals the constant temperature and humidity chamber 20. If the sealing mechanism is configured as described above, the constant temperature and humidity chamber 20 can be reliably sealed.

The ceiling surface 21A of the first auxiliary chamber 21 may not be provided with the annular concave surface 27. In this case, the seal member 521 is pressed against the flat surface portion of the ceiling surface 21A and cooperates with the lid portion 520 to close the communication hole 24 from the first auxiliary chamber 21 side. Further, the seal member 521 may be provided so as to be convex from the ceiling surface 21A of the first auxiliary chamber 21. In this case, an annular concave surface corresponding to the annular concave surface 27 may be provided on the upper surface 520A of the lid portion 520 facing the ceiling surface 21A in the vertical direction V. In any case, the seal member 521 is arranged between the upper surface 520A of the lid portion 520 and the ceiling surface 21A of the first auxiliary chamber 21.

As shown in FIGS. 3 to 5, the support leg portions 53 extend downward from the opening / closing portion 52 in the vertical direction V, and three support leg portions 53 are provided in the present embodiment. Since FIGS. 3 and 5 to 7 are cross-sectional views, only two support legs 53 are drawn, but in reality, there is another support leg 53 on the front side of the paper. Then, the support leg portion 53 passes through the communication hole 26 provided in the boundary wall 25 and extends from the first auxiliary chamber 21 to the second auxiliary chamber 22. The lower end of the support leg portion 53 is fixed to the leg-side support base 54 in the second auxiliary chamber 22. The leg-side support base 54 is configured in a plate shape.

The container support portion 5 moves up and down in the vertical direction V by an elevating mechanism 7 described later. When the container support portion 5 is lowered, as shown in FIG. 6A, the leg-side support base 54 comes into contact with the measurement surface 60 which is the upper surface of the weight measurement portion 6. Then, the total weight of the container support portion 5, the container 100, the calcium chloride (anhydrous) 120, and the measurement object 130 is applied to the weight measurement unit 6 through the measurement surface 60. When the container support portion 5 rises, as shown in FIG. 5, the leg-side support base 54 separates from the measurement surface 60 of the weight measurement unit 6, and no weight is applied to the weight measurement unit 6.

<Weight measurement unit>
The weight measuring unit 6 is located on the lower side of the container support portion 5 (leg-side support base 54), and measures the weight of water absorbed by the calcium chloride 120 through the measuring object 130 through the container support portion 5. It is a thing. When the container support portion 5 is placed on the measurement surface 60 which is the upper surface of the weight measurement unit 6, the total weight of the container support portion 5, the container 100, the calcium chloride (anhydrous) 120 and the measurement object 130 is the weight measurement unit 6. The weight is measured by the weight measuring unit 6. The weight measuring unit 6 is composed of, for example, an electronic balance.

<Elevating mechanism>
The elevating mechanism 7 moves the container 100 up and down together with the container support portion 5 in the vertical direction V. As shown in FIGS. 3A and 5, for example, the elevating mechanism 7 includes a motor 70, a first gear 71, a second gear 72, a drive shaft 73, a conversion unit 74, and a pressing member 75. , And a position detection unit 76.

The motor 70 rotates the first gear 71. As shown in FIG. 5, the first gear 71 is configured to mesh with the second gear 72. The first gear 71 has a smaller diameter and fewer teeth than the second gear 72. When the first gear 71 rotates, the second gear 72 rotates. As shown in FIGS. 3A and 5, the drive shaft 73 is connected to the center of the second gear 72, and the drive shaft 73 also rotates in conjunction with the rotation of the second gear 72. That is, the rotational power of the motor 70 is transmitted to the drive shaft 73 through the first gear 71 and the second gear 72.

The conversion unit 74 converts the rotation of the drive shaft 73 into a vertical movement of the pressing member 75 in the vertical direction V. As shown in FIG. 5, the conversion unit 74 has, for example, a cam 740 and a guide unit 741. The cam 740 is connected to the drive shaft 73, and the cam 740 also rotates in conjunction with the rotation of the drive shaft 73. The cam 740 is composed of, for example, a mushroom-shaped cam.

The pressing member 75 is moved by the cam 740 in the vertical direction V by a predetermined stroke. As shown in FIG. 6A, when the pressing member 75 is located at the lowest point of the moving range of the pressing member 75 in the vertical direction V (hereinafter referred to as the pressing member moving range), the cam 740 is the pressing member. Not in contact with 75. When the rotation mechanism including the motor 70, the first gear 71, the second gear 72, and the drive shaft 73 rotates clockwise from this lowest point state, the cam 740 comes into contact with the receiving surface 750 of the pressing member 75. Then, as shown in FIG. 6B, the pressing member 75 is gradually pushed up toward the upper side in the vertical direction V. Then, as shown in FIG. 7A, when the pressing member 75 reaches the highest point of the pressing member moving range, thereafter, as shown in FIG. 7B, the cam 740 receives the pressing member 75. The pressing member 75 gradually descends while in contact with the surface 750. Then, by the time the cam 740 completes one rotation, the cam 740 separates from the pressing member 75, and the pressing member 75 returns to the lowest point of the pressing member moving range (see FIG. 6A). That is, in the process of one rotation of the cam 740, the pressing member 75 is pressed by the cam 740 and can reciprocate between the lowest point and the highest point of the pressing member moving range.

The guide portion 741 guides the pressing member 75 in the vertical direction V. As shown in FIG. 5, the guide portion 741 is composed of two guide members 744 having an L-shaped surface 745 on the side facing the pressing member 75. The two guide members 744 are fixed inside the housing 2 at positions near the side surface 755 of the pressing member 75 and at positions such that the pressing member 75 is sandwiched from both sides of the pressing member 75 in the width direction.

As shown in FIG. 5, the L-shaped surface 745 has a guide surface 745A extending in the vertical direction V and a support surface 745B capable of supporting the pressing member 75 at the lowest point. The guide surface 745A faces the side surface 755 in the vicinity of the side surface 755 of the pressing member 75. While the pressing member 75 is pushed up by the cam 740, the pressing member 75 is guided in the vertical direction V by the guide surface 745A. Further, an L-shaped surface 751 is also provided on the side surface 755 of the pressing member 75. Of the L-shaped surface 751, the surface 751A extending in the width direction of the pressing member 75 comes into contact with the support surface 745B, so that the pressing member 75 is supported by the guide member 744 at the lowest point.

The pressing member 75 is provided so that the container support portion 5 can be pressed upward. Specifically, as shown in FIG. 5, the pressing member 75 is provided so as to be movable in the vertical direction V directly under the lid portion 520. That is, the pressing member 75 is not constrained to a specific location. When the pressing member 75 rises, the pressing member 75 facing the opening / closing portion 52 (cover portion 520) presses the lid portion 520 and pushes up the container support portion 5. Further, when the pressing member 75 is lowered, the container support portion 5 is lowered together with the lid portion 520.

Further, as shown in FIG. 5, the pressing member 75 has a pressing side convex portion 753. Then, as shown in the upper diagram of FIG. 4A, the pressing side convex portion 753 has a vertical direction V starting from a facing surface (pressing surface 752) facing the opening / closing portion 52 (cover portion 520) in the vertical direction V. It becomes convex on the upper side of. Further, the pressing side convex portion 753 is tapered so that the width of the pressing side convex portion 753 in the horizontal direction H becomes smaller as the pressing side convex portion 753 moves away from the facing surface (pressing surface 752) along the convex direction of the pressing side convex portion 753. The surface 754 is provided at or near the tip of the pressing side convex portion 753. Further, as shown in the upper view of FIG. 4A, the tapered surface 754 is preferably provided on both sides in the width direction of the pressing side convex portion 753 orthogonal to the convex direction. The pressing side convex portion 753 configured as described above constitutes the centering mechanism 8 in cooperation with the lid side hole 523.

The position detection unit 76 detects the position of the container support unit 5. Specifically, the position detection unit 76 detects both that the container support portion 5 is located at the highest point and that the container support portion 5 is located at the lowest point. As shown in FIG. 8A, such a position detection unit has a home sensor flag 760 and a photo sensor 761. The drive shaft 73 is connected to the center of the home sensor flag 760, and rotates in conjunction with the rotation of the drive shaft 73.

Further, the home sensor flag 760 is composed of a disk member having a first notch portion 762 and a second notch portion 763. The first notch portion 762 and the second notch portion 763 are portions in which a part of the disk member is cut out in a fan shape. The first notched portion 762 is a portion in which a part of the disk member is cut out by the central angle θ1 of the disk member. The second notch portion 763 is a portion in which a part of the disc member is cut out by the central angle θ2 of the disc member. The central angle θ1 is larger than the central angle θ2. Further, the home sensor flag 760 is made of a material capable of blocking light.

As shown in FIG. 8B, the photo sensor 761 has a light emitting unit 764, a light receiving unit 765, and an arrangement unit 766. The arrangement unit 766 arranges the light emitting unit 764 on one plane side of the home sensor flag 760, and arranges the light receiving unit 765 on the other plane side of the home sensor flag 760 so as to face the light emitting unit 764. The arrangement portion 766 has, for example, a U-shaped surface 767. The light emitting portion 764 is attached to one side of the facing surfaces of the U-shaped surface 767, and the light receiving portion 765 is attached to the other side. The arrangement portion 766 is installed on the photosensor side base portion 768.

When the home sensor flag 760 rotates together with the drive shaft 73, the light receiving unit 765 receives the optical signal from the light emitting unit 764 in the phase section corresponding to the first notch portion 762 and the second notch portion 763. continue. At this time, the reception duration in the light receiving unit 765 is different between the phase section corresponding to the first notch portion 762 and the phase section corresponding to the second notch portion 763. For example, when passing through the start point 762A of the phase section corresponding to the first notch portion 762, the container support portion 5 reaches the highest point in the vertical direction V, and the start point 763A of the phase section corresponding to the second notch portion 763 is reached. The container support portion 5 is set to reach the lowest point in the vertical direction V when passing through. Then, since the reception continuation time in the light receiving unit 765 is longer in the phase section corresponding to the first notch portion 762, in the state where the reception continuation time is long, the container support unit 5 of the control unit 9 is completed to rise. Judge that you are doing. On the other hand, since the reception continuation time in the light receiving unit 765 is shorter in the phase section corresponding to the second notch portion 763, in the state where the reception continuation time is short, the container support portion 5 of the control unit 9 is completely lowered. Judge that you are doing.

As described above, if the phase section corresponding to the first notch portion 762 and the second notch portion 763 is set, the control unit 9 takes a photo so that the container support portion 5 is located at the highest point or the lowest point. The operation of the motor 70 can be controlled according to the signal from the sensor 761.

The components constituting the elevating mechanism 7 can be divided into an electric drive unit that generates power by electricity and a power transmission unit that transmits the power of the electric drive unit. The electric drive unit includes a motor 70 and a position detection unit 76. The power transmission unit includes a first gear 71, a second gear 72, a drive shaft 73, a conversion unit 74, and a pressing member 75.

In the moisture permeability measuring device 1 of the present embodiment, the constant temperature and humidity constant chamber 20, the first auxiliary chamber 21, and the second auxiliary chamber 22 have a structure that allows communication with each other. Therefore, not only the constant temperature and humidity chamber 20, but also the first auxiliary chamber 21 and the second auxiliary chamber 22 have relatively high humidity. Therefore, it is preferable that the electric drive unit, which may be damaged by humidity, is arranged outside the constant temperature and humidity chamber 20, the first auxiliary chamber 21, and the second auxiliary chamber 22. In addition, outside the constant temperature and humidity chamber 20, the first auxiliary room 21, and the second auxiliary room 22, the outside of the housing 2 and even inside the housing 2, the constant temperature and humidity chamber 20, the first auxiliary. A room that does not communicate with either the room 21 or the second auxiliary room 22 is included. Such a place is preferable as a place for arranging the electric drive unit because the influence of humidity can be suppressed. In the present embodiment, as shown in FIGS. 1 and 2, for example, it is assumed that the electric drive unit is installed on the installation base unit 10 provided around the housing 2. The installation base portion 10 in the present embodiment is a portion in which the boundary wall 25 inside the housing 2 is extended to the outside of the housing 2, but is not limited thereto. The installation table portion 10 includes all the tables provided around the housing 2.

On the other hand, since the power transmission unit is more resistant to humidity than the electric drive unit, it may be arranged in either the first auxiliary chamber 21 or the second auxiliary chamber 22. However, even in the power transmission unit, if rust is generated due to humidity, it is preferable to arrange the power transmission unit outside the constant temperature and humidity chamber 20, the first auxiliary chamber 21, and the second auxiliary chamber 22 as much as possible. Since the influence of humidity can be suppressed outside the constant temperature and humidity chamber 20, the first auxiliary chamber 21, and the second auxiliary chamber 22, the part of the power transmission unit that is easily affected by humidity is the constant temperature and humidity chamber. 20 、 It is preferable to arrange it outside the first auxiliary room 21 and the second auxiliary room 22.

<Centering mechanism>
The centering mechanism 8 centers the container support portion 5 deviating from the preset reference center position with respect to the constant temperature and humidity chamber 20 to the reference center position. At the reference center position, as shown in FIG. 4B, when the seal member 521 and the annular concave surface 27 are viewed in a plan view from the upper side in the vertical direction V, the seal member 521 as a whole is the annular concave surface 27 in the horizontal direction H. It is superimposed on the first region surrounded by (in FIG. 4B, the region in the range between the outer surface 27A and the inner surface 27B of the annular concave surface 27). That is, when the seal member 521 moves relative to the annular concave surface 27 in the vertical direction V, the seal member 521 is positioned at a position where the entire seal member 521 fits in the first region. Similarly, at the reference center position, as shown in FIG. 4B, when the pressing side convex portion 753 and the lid side hole 523 are viewed in a plan view from the upper side in the vertical direction V, the pressing side convex portion is formed in the horizontal direction H. The 753 is superimposed on the second region (in FIG. 4B, the region between the outer surface 523A and the inner surface 523B of the lid side hole 523), which is entirely surrounded by the lid side hole 523. That is, when the pressing side convex portion 753 moves relative to the lid side hole 523 in the vertical direction V, the pressing side convex portion 753 is located at a position where the entire pressing side convex portion 753 fits in the second region.

Further, at the reference center position, as shown in FIG. 3A, the support leg portion 53 is located at a position where the support leg portion 53 does not come into contact with the communication hole 26 of the boundary wall 25. As a result, at the reference center position, when the container support portion 5 is lowered by the elevating mechanism 7 and placed on the measurement surface 60 of the weight measurement unit 6, the container support portion 5 is around as shown in FIG. 6 (A). It is in a state where it does not come into contact with the housing 2 and the power transmission unit of the above.

As shown in FIG. 4B, the centering mechanism 8 is composed of a lid side hole 523 of the lid portion 520 and a pressing side convex portion 753 of the pressing member 75. The lid side hole 523 has a size into which the pressing side convex portion 753 can be inserted. In particular, the hole width of the lid side hole 523 in the horizontal direction H is preferably the same as or slightly larger than the width of the pressing side convex portion 753 in the horizontal direction H. As shown in FIG. 5, even if the pressing side convex portion 753 moves in the horizontal direction H in the lid side hole 523, the hole of the lid side hole 523 does not come into contact with the communication hole 26. The width and the width of the pressing side convex portion 753 are determined.

As shown in FIG. 4B, when the container support portion 5 is located at the reference center position, in the horizontal direction H when the pressing side convex portion 753 and the lid side hole 523 are viewed in a plan view from the upper side in the vertical direction V. , The pressing side convex portion 753 is entirely superimposed on the first region of the lid side hole 523. Therefore, when the pressing member 75 moves upward in the vertical direction V, the tapered surface 754 of the pressing side convex portion 753 just fits into the lid side hole 523 without contacting the opening 523C of the lid side hole 523. ..

On the other hand, as shown in FIG. 9A, when the container support portion 5 is deviated from the reference center position, the pressing side convex portion 753 and the lid side hole 523 are flat in the vertical direction V from the upper side in the vertical direction V. When viewed, in the horizontal direction H, the pressing side convex portion 753 partially overlaps with the first region of the lid side hole 523, and the rest is located outside the first region. That is, in the horizontal direction H, the pressing side convex portion 753 is in a state in which a part thereof protrudes from the lid side hole 523. Therefore, when the pressing member 75 moves to the upper side in the vertical direction V, as shown in FIG. 9B, the tapered surface 754 of the pressing side convex portion 753 becomes the lower side (pressing side convex portion) of the lid side hole 523. Contact the opening 523C (proximal to 753). However, when the pressing side convex portion 753 moves upward as it is, the entire container support portion 5 is guided to the tapered surface 754 together with the opening 523C of the lid side hole 523, and slides in the direction along the tapered surface 754. Then, as shown in FIG. 9C, the pressing side convex portion 753 is fitted into the lid side hole 523. That is, the pressing side convex portion 753 functions as a centering convex portion, and the lid side hole 523 functions as a centering hole for receiving the centering convex portion. Then, in the process of moving the power transmission portion having the centering convex portion (pressing side convex portion 753) upward, the container support portion 5 having the centering hole (cover side hole 523) is centered toward the reference center position. Will be done.

As shown in FIG. 9B, in order for the container support portion 5 to be centered, in the horizontal direction H when the pressing side convex portion 753 and the lid side hole 523 are viewed in a plan view from the upper side in the vertical direction V. Both tapered surfaces 754 provided on both sides of the pressing side convex portion 753 in the width direction (horizontal direction H) need to overlap with the first region of the lid side hole 523. If the container support portion 5 is displaced from the reference center position to such an extent that the entire tapered surface 754 is located outside the first region of the lid side hole 523, the container support portion 5 is not centered. If the moisture permeability measuring device 1 is configured so that the support leg 53 comes into contact with the communication hole 26 before the entire tapered surface 754 is located outside the first region of the lid side hole 523, it will not be centered. It doesn't become a situation.

<Modification example of centering mechanism>
Further, as shown in FIG. 10A, a tapered surface 524 may be provided on the lower side of the lid side hole 523. The tapered surface 524 starts from the opening 523C on the lower side of the lid side hole 523 and advances in the vertical direction V upward along the penetration direction of the lid side hole 523 (thickness direction of the lid portion 520), and is horizontally H. The hole width of the lid side hole 523 in the above is inclined so as to be small. If the lid side hole 523 is configured in this way, the container support portion 5 deviated from the reference center position can be centered at the reference center position even if the pressing side convex portion 753 does not have the tapered surface 754. As shown in FIG. 10A, when the pressing side convex portion 753 and the lid side hole 523 are viewed in a plan view from the upper side in the vertical direction V, the pressing side convex portion 753 as a whole is the lid side hole in the horizontal direction H. If the container support portion 5 is displaced from the reference center position so as to overlap with the 523 and overlap with the tapered surface 524, when the pressing side convex portion 753 moves upward in the vertical direction V, the pressing side convex portion 753 Is guided by the tapered surface 524, and the container support portion 5 is centered at the reference center position.

As shown in FIG. 10B, when the pressing side convex portion 753 has a tapered surface 754 and the lid side hole 523 has a tapered surface 524, the container support portion 5 is larger than the reference center position. The container support portion 5 is centered at the reference center position even if it is displaced. That is, the amount of deviation of the container support portion 5 from the reference center position for exhibiting the centering function can be increased. When the pressing side convex portion 753 and the lid side hole 523 are viewed in a plan view from the upper side in the vertical direction V, the pressing side convex portion 753 on the same side in the horizontal direction H has the tapered surface 754 and the tapered surface 524 of the lid side hole 523. If is superimposed, the container support portion 5 is centered at the reference center position.

Further, as shown in FIG. 10C, a recess 230 corresponding to the lid side hole 523 of the lid portion 520 is provided on the boundary wall 23 (housing 2), and corresponds to the pressing side convex portion 753 of the pressing member 75. The lid-side convex portion 522 may be provided on the upper surface 520A of the lid portion 520 (container support portion 5). The lid-side convex portion 522 has a tapered surface 525 corresponding to the tapered surface 754. Even if the container support portion 5 is deviated from the reference center position, when the container support portion 5 is pushed up by the pressing member 75 and the tapered surface 525 comes into contact with the opening 231 of the recess 230, the container support portion 5 becomes the tapered surface 525. It is guided to the reference center position and centered. Further, as the centering mechanism 8, both the lid side hole 523 of the lid portion 520 and the pressing side convex portion 753 of the pressing member 75, and both the concave portion 230 of the boundary wall 23 and the lid side convex portion 522 of the lid portion 520 are provided. May be good. In this case, the lid-side convex portion 522 functions as a centering convex portion, and the concave portion 230 functions as a centering hole. Further, the centering mechanism 8 is formed by the annular concave surface 27 corresponding to the concave portion 230 and the seal member 521 having the tapered surface 526 (see FIG. 10C) corresponding to the lid side convex portion 522 and the tapered surface 525. It may be configured. That is, the sealing mechanism may be configured to also serve as the centering mechanism 8. In this case, the seal member 521 functions as a convex portion for centering, and the annular concave surface 27 functions as a hole for centering.

As described above, the centering mechanism 8 is provided at the contact portion between the power transmission unit and the container support portion 5 and / or at the contact portion between the container support portion 5 and the housing 2. For example, when the weight of the container support portion 5 is measured by the weight measuring unit 6 in a state where the container support portion 5 is in contact with the communication hole 26 (see FIG. 5) of the boundary wall 25, the container is supported by the contact with the communication hole 26. Since the portion 5 is supported by the communication hole 26, the entire weight of the container support portion 5, the container 100, the calcium chloride (anhydrous) 120 and the measurement object 130 is dispersed and applied to the communication hole 26 and the weight measurement unit 6. As described above, at the reference center position, when the container support portion 5 descends and is placed on the measurement surface 60 of the weight measurement unit 6, the container support portion 5 is placed on the surrounding housing 2 and the power transmission unit or the like. The weight can be measured by the weight measuring unit 6 without contact. Therefore, if the container support portion 5 can be centered at the reference center position by the centering mechanism 8, the total weight of the container support portion 5, the container 100, the calcium chloride (anhydrous) 120, and the measurement object 130 can be accurately measured by the weight measuring unit 6. It becomes possible to do.

<Device cover>
As shown in FIG. 11, the moisture permeability measuring device 1 according to the embodiment of the present invention may be entirely covered with the device cover 200. In this case, a transparent cover 210 made of a transparent material is provided as a part of the device cover 200 so that the liquid crystal panel 61 of the weight measuring unit 6 can be visually recognized from the outside. Further, an opening 220 is provided in the area corresponding to the operation unit 62 so that the operation unit 62 of the weight measurement unit 6 can be operated from the outside.

<Operation of moisture permeability measuring device>
First, by rotating the rotation mechanism, the container support portion 5 is raised to the highest point, and the communication hole 24 is closed by the opening / closing portion 52. As a result, the constant temperature and humidity chamber 20 is in a sealed state. Then, the humidity adjusting unit 3 is operated to reduce the humidity in the constant temperature and humidity chamber 20 to 90%. Further, the temperature adjusting unit 4 is operated to set the temperature in the constant temperature and humidity chamber 20 to 40 degrees. In the constant temperature and humidity chamber 20 in this state, a container 100 containing calcium chloride (anhydrous) 120 and the object to be measured 130 is housed.

Then, after a predetermined time has elapsed in the same state, the container support portion 5 is lowered to the lowest point by rotating the rotation mechanism, and the weight of the container support portion 5 in which the container 100 is placed is placed. Is measured by the weight measuring unit 6. This is done at predetermined time intervals. The increase in weight from the previous time is the permeation amount of water vapor in the object to be measured 130. The moisture permeability of the object to be measured 130 can be determined based on the permeation amount of water vapor at predetermined time intervals. The control unit 9 monitors the measurement results of the humidity measuring unit 36 and the temperature measuring unit 43 so that the humidity of the constant temperature and humidity chamber 20 is maintained at 90% and the temperature is maintained at 40 degrees. And the temperature adjusting unit 4 is operated.

It should be noted that the moisture permeability measuring device of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made within a range not deviating from the gist of the present invention.

1 Moisture Permeability Measuring Device 2 Housing 2A Outer Wall of Constant Temperature and Humidity Room 3 Humidity Control Unit 4 Temperature Control Unit 5 Container Support Unit 6 Weight Measuring Unit 7 Elevating Mechanism 8 Centering Mechanism 9 Control Unit 10 Installation Base 20 Constant Temperature and Humidity Room 21 1st auxiliary room 21A Ceiling surface 22 2nd auxiliary room 23,25 Boundary wall 24,26 Communication hole 27 Circular concave surface 37 Blower 38 Moisture absorption part 40 Pelche element 52 Opening and closing part 53 Support leg part 61 Liquid crystal panel 62 Operation part 70 Motor 71 1st gear 72 2nd gear 73 Drive shaft 74 Conversion part 75 Pressing member 76 Position detection part 100 Container 130 Measurement target 200 Equipment cover 351 Steam supply pipe 353 Discharge port 520 Lid part 521 Circular convex part 523 Lid side hole 753 Pressing Side convex part 754 Tapered surface

Claims (10)

It has a constant temperature and humidity chamber and an auxiliary chamber that is located below the constant temperature and humidity chamber and communicates with the constant temperature and humidity chamber through a communication hole provided in the boundary wall between itself and the constant temperature and humidity chamber. With the housing
A humidity control unit that adjusts the humidity of the constant temperature and humidity chamber,
A temperature control unit that adjusts the temperature of the constant temperature and humidity chamber,
A container support portion having an opening / closing portion for opening / closing the communication hole while supporting the container so that the container for accommodating the object to be measured is located in the constant temperature / humidity chamber.
A weight measuring unit located below the container support and measuring the weight of the object to be measured through the container support.
The container is moved up and down together with the container support portion, the container support portion is separated from the weight measuring portion when ascending, the communication hole is closed in the opening / closing portion, and the container support portion is weighed when descending. An elevating mechanism that allows the communication hole to be opened in the opening / closing part while placing it on the part so that the weight can be measured.
Equipped with
The elevating mechanism is arranged so as to extend from the inside of the auxiliary chamber to the outside of the auxiliary chamber.
Moisture permeability measuring device. The elevating mechanism
An electric drive unit that produces power by electricity,
The power transmission unit that transmits the power of the electric drive unit and
Have,
At least a part of the power transmission unit is arranged inside the auxiliary chamber.
The electric drive unit is arranged outside the auxiliary chamber.
The moisture permeability measuring device according to claim 1. The electric drive unit is a motor.
The power transmission unit is
A pressing member provided so that the container support portion can be pressed upward, and
A drive shaft that rotates by transmitting the rotational power of the motor,
A conversion unit that converts the rotation of the drive shaft into an up-and-down movement of the pressing member along the vertical direction.
Have,
When the pressing member rises, the container support portion is pressed to raise the container support portion.
When the pressing member is lowered, the container support portion is lowered, and the container support portion is lowered.
The pressing member, at least a part of the drive shaft, and the conversion unit are arranged in the auxiliary chamber.
The moisture permeability measuring device according to claim 2. The opening / closing portion has a lid portion that can cover and close the communication hole.
An annular sealing member surrounding the communication hole is arranged between the surface of the boundary wall on the auxiliary chamber side and the upper surface of the lid portion.
The moisture permeability measuring device according to any one of claims 1 to 3. An annular concave surface for holding the sealing member is formed on at least one of the surface on the auxiliary chamber side or the upper surface of the lid portion of the boundary wall.
The moisture permeability measuring device according to claim 4. The container deviates from the reference center position preset with respect to the constant temperature and humidity chamber at the contact portion between the power transmission portion and the container support portion and / or the contact portion between the container support portion and the housing. A centering mechanism for centering the support portion at the reference center position is provided.
The moisture permeability measuring device according to claim 2 or 3. The centering mechanism is
A centering convex portion provided on the power transmission unit and a convex portion for centering,
A centering hole provided on the container support side and receiving the centering convex portion,
Have,
The centering convex portion and / or the centering hole is characterized in that a tapered surface for guiding to the reference center position is formed.
The moisture permeability measuring device according to claim 6. The temperature control unit includes a Pelche element.
The Pelche element is characterized in that it heats and cools the outer wall of the constant temperature and humidity chamber.
The moisture permeability measuring device according to any one of claims 1 to 7. The humidity control unit is
A steam generator that generates steam and
A steam supply pipe connected to the constant temperature and humidity chamber and supplying the steam to the constant temperature and humidity chamber,
Have,
The constant temperature and humidity chamber is characterized by disposing a moisture absorbing portion made of a material capable of absorbing the liquefied moisture of the steam supplied from the steam supply pipe.
The moisture permeability measuring device according to any one of claims 1 to 8. It is characterized by including a blower portion that blows water vapor inside the constant temperature and humidity chamber in the horizontal direction.
The moisture permeability measuring device according to any one of claims 1 to 9.

Images