JP2015031664A - Sample rotating table, and device for testing photostability including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To irradiate each sample mounted on a sample rotating table with light uniformly as much as possible.SOLUTION: A lower rotating table 25 is rotatably supported on a rotating table body 21, and rotated by a drive motor 22. A first driven shaft 29 supported, rotatably with respect to the lower rotating table 25, on the inner periphery of a vertical wall 26a of a cylindrical member 26 disposed in the rotating table body 21 is driven by the rotation of the lower rotating table 25, thereby rotating a first upper rotating table 30. A second driven shaft 34 supported rotatably with respect to the lower rotating table 25 is driven by transmission of the torque of the first driven shaft 29, thereby rotating a second upper rotating table 35.

Description

  The present invention relates to a sample turntable for rotating a sample and a light stability test apparatus including the sample turntable.

  2. Description of the Related Art Conventionally, a photostability test apparatus having an environmental test room for testing photostability of drugs and the like has been known (see, for example, Patent Document 1). In this light stability test apparatus, a plurality of rod-like fluorescent lamps are arranged in parallel at the top of a box-shaped environmental test chamber, and a sample turntable such as a turntable is provided at the bottom of the environmental test chamber. Then, by rotating the sample mounting surface of the sample turntable while irradiating light from a fluorescent lamp, the sample placed on the sample mounting surface is uniformly irradiated with light.

Japanese Patent No. 4827700

  However, in the above-mentioned Patent Document 1, although the arrangement of the fluorescent lamps is optimized, when the light stability test is performed by placing the sample on the sample placement surface that is rotatably supported by the sample stage, There is a tendency that the center side of the mounting surface is more easily exposed to light.

  The present invention has been made in view of such a point, and an object of the present invention is to make light hitting each sample placed on a turntable as uniform as possible.

  In order to achieve the above object, the present invention utilizes the revolution operation of the lower turntable and the rotation operation of the upper turntable supported thereon.

Specifically, in the first invention,
A turntable body,
A drive motor provided in the rotary table body;
A drive pulley provided integrally with the rotation shaft of the drive motor;
A first transmission belt hung on the drive pulley;
A lower turntable rotatably supported by the turntable body;
A driven portion provided on the lower turntable and on which the first transmission belt is hung;
A cylindrical member provided on the turntable body;
A first driven shaft that is rotatably supported by the lower rotating table, abuts on the inner periphery of the vertical wall of the cylindrical member, and is driven by the rotation of the lower rotating table;
A first upper turntable provided integrally with the first driven shaft;
A first driven pulley provided integrally with the first driven shaft;
A second transmission belt hung on the first driven pulley;
A second driven shaft that is rotatably supported by the lower turntable and on which a second driven pulley on which the second transmission belt is hung is provided integrally with rotation;
And a second upper turntable provided integrally with the second driven shaft.

  According to said structure, the driving force of a drive motor is transmitted to a lower turntable by the 1st transmission belt hung on a drive pulley and a to-be-driven part, and a lower turntable rotates. The first driven shaft supported by the lower rotating table is rotated by abutting the inner periphery of the vertical wall of the cylindrical member to rotate the first upper rotating table, and the rotational force is transmitted via the second transmission belt. And transmitted to the second driven shaft to rotate the second upper turntable. For this reason, since the first upper rotary table and the second upper rotary table revolve while rotating with a single drive motor, light is evenly applied to the sample placed on the first upper rotary table and the second upper rotary table. Can be applied.

In the second invention, in the first invention,
The cylindrical member is supported via a vibration isolating member with respect to the turntable body.

  According to the above configuration, even if there is a dimensional error in each part of the sample turntable, the cylindrical member is supported by the turntable body via the vibration isolator, so the dimensional error is absorbed. Thus, the rotational force of the lower turntable can be smoothly transmitted to the first driven shaft.

In the third invention, in the first or second invention,
A reaction force roller that pushes back the inner periphery of the vertical wall with a predetermined force at a position facing the first driven pulley is rotatably supported on the lower turntable.

  According to the above configuration, the first driven pulley can be pressed against the inner circumference of the vertical wall with an appropriate force by pushing back the inner circumference of the vertical wall with the reaction force roller at the opposing position. Rotates smoothly, and the rotational force is transmitted to the first driven shaft through the inner surface of the vertical wall.

In a fourth invention, in any one of the first to third inventions,
A third driven pulley which is provided integrally with the second driven shaft and is engaged with a third transmission belt;
A third driven shaft that is rotatably supported by the lower turntable and on which a fourth driven pulley on which the third transmission belt is hung is provided integrally with rotation;
And a third upper turntable provided integrally with the third driven shaft.

  According to the above configuration, the rotational force of the second driven shaft is transmitted to the fourth driven pulley via the third transmission belt, whereby the third driven shaft rotates and the third upper turntable is driven. Therefore, it is possible to revolve while simultaneously rotating the three upper turntables. For this reason, more samples can be placed on the upper turntable.

In the fifth invention,
A turntable body,
A drive motor provided in the rotary table body;
A lower turntable rotatably supported by the turntable body and rotated by the drive motor;
A cylindrical member provided on the turntable body;
It is rotatably supported by the lower rotating table, abuts on the inner periphery of the vertical wall of the cylindrical member, and is provided integrally with the tip of the first driven shaft that is driven by the rotation of the lower rotating table. A first upper turntable,
A second upper rotary table that is rotatably supported by the lower rotary table, and is provided integrally with the tip of the second driven shaft that is driven by the rotational force of the first driven shaft. ing.

  According to said structure, while transmitting the rotational force of the lower turntable rotated with a drive motor to a 1st upper turntable via a cylindrical member, a 2nd upper turntable also rotates using the rotation force. Can be made. For this reason, by rotating around the first upper rotary table and the second upper rotary table, light can be uniformly applied to the samples on the first upper rotary table and the second upper rotary table.

A light stability test apparatus according to a sixth aspect of the invention includes an apparatus main body having an environmental test chamber that houses the sample turntable of any one of the first to fifth aspects of the invention,
A light source for irradiating a light beam toward the sample turntable.

  According to said structure, a highly accurate optical stability test can be performed by irradiating light uniformly to the sample on a 1st upper side turntable and a 2nd upper side turntable.

  As described above, according to the present invention, the rotational force of the lower rotary table is transmitted to the first upper rotary table via the cylindrical member, and the second upper rotary table also rotates using the rotational force. By doing so, the light impinging on each sample placed on the sample turntable can be made as uniform as possible.

It is a top view which shows the sample turntable which concerns on embodiment of this invention. It is a front view which shows typically the structure of an optical stability test apparatus. It is a front view of a sample turntable. It is a side view of a sample turntable. It is a bottom view which shows schematic structure of a lower turntable.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 is a schematic front view of a light stability test apparatus 10 having a sample turntable 20 according to an embodiment of the present invention. The light stability test apparatus 10 includes an environmental test chamber 11 that houses the sample turntable 20. A device body 12 having a rectangular parallelepiped box shape is provided. A rectangular plate-shaped opening / closing door (not shown) is attached to the apparatus main body 12 so as to be freely opened and closed on the front side of the apparatus.

  As shown in FIGS. 1, 3, and 4, the sample turntable 20 includes a cuboid turntable main body 21, and a drive motor 22 such as a transmission motor is provided on the turntable main body 21 with its rotation shaft 22a. Are attached to extend vertically. A driving pulley 23 made of, for example, an aluminum alloy or a stainless steel alloy is integrally provided on the rotating shaft 22a. 1, 3, and 4 show a state in which the rotation angle of the lower turntable 25 described later is different for easy viewing.

  An annular first transmission belt 24 made of polyurethane or the like is hung on the drive pulley 23. The first transmission belt 24 is not limited to a polyurethane belt, and may be selected in consideration of weather resistance, wear resistance, and the like. On the other hand, a circular dish-shaped lower turntable 25 made of stainless steel plate or the like is rotatably supported on the upper surface of the turntable body 21. Specifically, three rotation support portions 43 are provided on the outer periphery of the lower turntable 25. Each rotation support portion 43 includes a side roller 43a that abuts on the outer periphery of the lower turntable 25 and a lower surface roller 43b that abuts the lower surface.

  A cylindrical member 26 having an inner diameter slightly larger than the outer diameter of the lower turntable 25 and having a vertical wall 26a rising vertically is provided above the lower turntable 25. A flange portion 26 b that extends horizontally is formed on the entire circumference of the cylindrical member 26, and, for example, three locations of the flange portion 26 b are fixed to the upper surface of the turntable body 21 via a vibration isolation member 27. For example, each of the vibration isolating members 27 is provided on each of the three rotation support portions 43, but the number and mounting position thereof are not particularly limited. Although the vibration isolator 27 of this embodiment is provided with the vibration isolator of silicone, for example, it is not limited to it. By providing this vibration isolating member 27, the cylindrical member 26 is not completely fixed to the turntable body 21, but is allowed to vibrate somewhat, and can absorb dimensional errors such as the mounting position.

  As shown in FIG. 5, a plurality of lower driven parts 28 made of pulleys around which the first transmission belt 24 is hung are provided on the lower surface of the lower rotary base 25. In the present embodiment, twelve lower driven parts 28 are provided on the lower surface of the lower turntable 25. By rotating the drive pulley 23 in a state where the first transmission belt 24 is hung on the lower driven portion 28, the lower rotary base 25 can rotate at a predetermined speed.

  The first driven shaft 29 is rotatably and vertically supported on the upper surface side of the lower rotating table 25, and the first upper rotating table 30 on which the sample S is placed on the tip of the first driven shaft 29. Are connected together in a rotating manner. A first driven pulley 31 is connected to the first driven shaft 29 on the lower side of the first upper turntable 30 so as to rotate together. Under the first driven pulley 31, a contact portion 32 in which a non-slip material such as an elastomer is fitted on the outside of the disk is provided integrally with the rotation, and the contact portion 32 is provided in the vertical wall 26a. It contacts with the circumference and is driven as the lower turntable 25 rotates.

  A second transmission belt 33 is hung on the first driven pulley 31. The second transmission belt 33 may be made of the same material as the first transmission belt 24.

  Further, a second driven shaft 34 extending vertically with an angle of 120 ° with the first driven shaft 29 is rotatably supported on the lower turntable 25. A second upper rotary table 35 on which the sample S is placed is connected to the tip of the second driven shaft 34 in a rotationally integrated manner, and the second driven belt 33 is hung on the lower side thereof. A pulley 36 is provided integrally with the rotation. Below the second driven pulley 36 of the second driven shaft 34, a third driven pulley 37 is provided integrally with the rotation, and a third transmission belt 38 is hung. The third transmission belt 38 may be made of the same material as that of the first transmission belt 24.

  Further, a third driven shaft 39 extending vertically is supported on the lower turntable 25 so as to be rotatable at positions 120 ° apart from the first driven shaft 29 and the second driven shaft 34. A third upper turntable 40 on which the sample S is placed is connected to the tip of the third driven shaft 39 in an integrated manner. The third driven shaft 39 is integrally provided with a fourth driven pulley 41 on which the third transmission belt 38 is hung.

  A reaction force roller 42 that abuts the inner periphery of the vertical wall 26 a is rotatably supported on the lower turntable 25 at a position facing the first driven pulley 31. The reaction force roller 42 is rotatably provided at the tip of a swing arm 42a fixed to the lower rotary base 25 so as to be swingable. The swing arm 42a is configured to be pushed back in the circumferential direction by a coil spring (not shown).

  As shown in FIG. 2, the sample turntable 20 is provided in the lower part of the environmental test chamber 11, and the first to third upper turntables 30, 35, A plurality of fluorescent lamps 15 are arranged as light sources for irradiating light toward 40. The side wall surface of the environmental test chamber 11 is composed of a reflective material 13 having a reflectance of 20% or more of the light emitted from the fluorescent lamp 15, and in this embodiment, a mirror-finished stainless steel plate is used. .

  The plurality of fluorescent lamps 15 are for irradiating the sample S with light rays including ultraviolet rays, are formed in a rod shape, and are provided with plugs (not shown) at both ends thereof. It is attached to the upper space of the environmental test chamber 11 by being inserted into a socket 16 provided at the top of the environmental test chamber 11.

  Below the environmental test chamber 11 in the apparatus main body 12, a control unit 14 is provided for controlling temperature or humidity conditions in the environmental test chamber 11, irradiance of the fluorescent lamp 15, ultraviolet intensity, and the like.

-Light stability test of sample-
Next, a method of using the light stability test apparatus 10 according to the embodiment of the present invention will be described. In the environmental test chamber 11, a light beam containing ultraviolet rays is irradiated from the fluorescent lamp 15 to the sample S such as a medicine placed on the first to third upper turntables 30, 35, and 40. Light stability is tested. Thereby, for example, data of a light resistance test necessary for receiving a manufacturing approval application for a pharmaceutical product can be obtained.

  During the test, light is emitted from the fluorescent lamp 15 while the sample turntable 20 is driven at a predetermined rotation speed.

  First, when the drive motor 22 is driven, the driving force is transmitted to the lower rotary base 25 by the first transmission belt 24 applied to the drive pulley 23 and the lower driven portion 28, and the lower rotary base 25 is Rotate.

  The contact portion 32 of the first driven shaft 29 supported by the lower turntable 25 is rotated by contacting the inner periphery of the vertical wall 26a of the cylindrical member 26, and the first upper turntable 30 is rotated. . At the same time, the rotational force is transmitted to the second driven shaft 34 by the second transmission belt 33, and the second upper rotary table 35 rotates.

  At the same time, the rotational force of the second driven shaft 34 is transmitted to the fourth driven pulley 41 via the third transmission belt 38, the third driven shaft 39 rotates, and the third upper rotary table 40 is also driven.

  For this reason, the first to third upper turntables 30, 35, and 40 revolve while being rotated by one drive motor 22, so the sample placed on the first to third upper turntables 30, 35, and 40 It becomes possible to irradiate light uniformly to S.

  Since the cylindrical member 26 is supported by the turntable body 21 via the vibration isolating member 27, even if a dimensional error has occurred in each component, the dimensional error is absorbed and the lower turntable 25 is absorbed. Can be smoothly transmitted to the first driven shaft 29.

  Further, by pushing back the inner periphery of the vertical wall 26a by the reaction force roller 42 at a position facing the first driven pulley 31, the first driven pulley 31 can be pressed against the inner periphery of the vertical wall 26a with an appropriate force. Thus, the rotational force of the lower turntable 25 is smoothly transmitted to the first driven shaft 29 via the inner surface of the vertical wall 26a.

  Therefore, according to the sample turntable 20 according to the present embodiment, the light hitting each sample S placed on the first to third upper turntables 30, 35, 40 can be made as uniform as possible, and light with high accuracy. A stability test can be performed.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above embodiment, the twelve lower driven parts 28 are provided on the lower surface of the lower turntable 25, but the number thereof is not limited. For example, one large pulley is provided on the lower surface of the lower driven part 28. The first transmission belt 24 may be hung.

  In the above embodiment, the three upper rotary tables 30, 35, and 40 are provided, but only two or four or more may be provided.

  In the above embodiment, the cylindrical member 26 has the vertical wall 26a having an inner diameter slightly larger than the outer diameter of the lower turntable 25. However, the present invention is not limited to this, and the inner diameter of the vertical wall 26a is It may be smaller than the outer diameter of the turntable 25.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

  As described above, the present invention is useful for a sample turntable for rotating a sample such as a medicine and a light stability test apparatus including the sample turntable.

10 Light stability test equipment
11 Environmental test room
15 Fluorescent lamp (light source)
20 Sample turntable
21 Turntable body
22 Drive motor
22a Rotating shaft
23 Drive pulley
24 1st transmission belt
25 Lower turntable
26 Cylindrical member
26a vertical wall
27 Anti-vibration member
28 Lower driven part (driven part)
29 First driven shaft
30 First upper turntable
31 First driven pulley
33 Second transmission belt
34 Second driven shaft
35 Second upper turntable
36 Second driven pulley
37 Third driven pulley
38 3rd transmission belt
39 Third driven shaft
40 Third upper turntable
41 4th driven pulley
42 Reaction force roller

Claims (6)

A turntable body,
A drive motor provided in the rotary table body;
A drive pulley provided integrally with the rotation shaft of the drive motor;
A first transmission belt hung on the drive pulley;
A lower turntable rotatably supported by the turntable body;
A driven portion provided on the lower turntable and on which the first transmission belt is hung;
A cylindrical member provided on the turntable body;
A first driven shaft that is rotatably supported by the lower rotating table, abuts on the inner periphery of the vertical wall of the cylindrical member, and is driven by the rotation of the lower rotating table;
A first upper turntable provided integrally with the first driven shaft;
A first driven pulley provided integrally with the first driven shaft;
A second transmission belt hung on the first driven pulley;
A second driven shaft that is rotatably supported by the lower turntable and on which a second driven pulley on which the second transmission belt is hung is provided integrally with rotation;
A sample turntable including a second upper turntable provided integrally with the second driven shaft. The sample turntable according to claim 1,
The sample turntable characterized in that the cylindrical member is supported on the turntable body via a vibration isolating member. In the sample turntable according to claim 1 or 2,
A sample turntable characterized in that the lower turntable is rotatably supported with a reaction force roller that pushes back the inner circumference of the vertical wall with a predetermined force at a position facing the first driven pulley. . In the sample turntable according to any one of claims 1 to 3,
A third driven pulley which is provided integrally with the second driven shaft and is engaged with a third transmission belt;
A third driven shaft that is rotatably supported by the lower turntable and on which a fourth driven pulley on which the third transmission belt is hung is provided integrally with rotation;
A sample turntable further comprising a third upper turntable provided integrally with the third driven shaft. A turntable body,
A drive motor provided in the rotary table body;
A lower turntable rotatably supported by the turntable body and rotated by the drive motor;
A cylindrical member provided on the turntable body;
It is rotatably supported by the lower rotating table, abuts on the inner periphery of the vertical wall of the cylindrical member, and is provided integrally with the tip of the first driven shaft that is driven by the rotation of the lower rotating table. A first upper turntable,
A second upper rotary table that is rotatably supported by the lower rotary table, and is provided integrally with the tip of the second driven shaft that is driven by the rotational force of the first driven shaft. A sample turntable characterized by that. An apparatus main body having an environmental test chamber for accommodating the sample turntable according to any one of claims 1 to 5;
A light stability testing apparatus comprising: a light source that is provided on the surface of the environmental test chamber and that emits light toward the sample turntable.

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