JP5209156B2 - Vacuum desiccator and sealing member - Google Patents

Description

  The present invention relates to a vacuum desiccator that can maintain a reduced pressure state of a sliding-type vacuum desiccator, prevent sticking of the lid, and can be easily opened and closed, and a sealing member used therefor.

  2. Description of the Related Art Conventionally, a vacuum desiccator is known in which an object to be held in a reduced pressure is stored and then sucked to easily hold a vacuum. As shown in FIG. 5, such a vacuum desiccator is composed of a desiccator body 10 having an opening 10a and an upper lid 11 covering the opening 10a of the desiccator body 10, and an object to be stored in a vacuum is formed by the opening 10a. The vacuum desiccator is a device that can be housed in the desiccator body 10 from the formed opening, and after the upper lid 11 is covered, and then sucked by a suction device (not shown) connected to the suction port 11a to easily maintain a vacuum or reduced pressure atmosphere. Was known. In such a conventional vacuum desiccator, a sliding surface 10b is provided on the upper surface of the opening 10a of the desiccator body 10 in order to maintain a vacuum or a reduced pressure atmosphere, and the sliding surface 10b of the desiccator body 10 of the upper lid 11 is provided. A sliding surface 11b is provided at a portion in contact with the sliding surface, and a method of ensuring airtightness by applying petrolatum or the like to the sliding surfaces 10b and 11b, or an upper lid through an O-ring to ensure airtightness. A method for facilitating the removal of the upper lid has been known.

  However, when petrolatum is applied to the sliding surfaces 10b and 11b, when the inside of the vacuum desiccator is taken out, the sliding surfaces 10b and 11b are fixed by suction, and the desiccator body 10 and the upper lid 11 are not easily separated. In particular, when the outside air temperature is low, the petroleum jelly becomes hard and warmed with a dryer or the like to soften, and the lid is hit with a wooden mallet to remove it. For this reason, it takes time, and in the worst case, the vacuum desiccator may be damaged or destroyed. Further, when an O-ring is used, a groove for accommodating the O-ring must be provided in the sliding surface 10b of the desiccator body 10, so that the vacuum desiccator becomes expensive.

  Japanese Utility Model Publication No. 58-89649 discloses a vacuum desiccator in which a spacer and an O-ring are mounted between a main body of a vacuum desiccator and an upper lid. There has been proposed a vacuum desiccator that eliminates the need to provide a ring-accommodating groove in the sliding portion of the desiccator body and can be manufactured at low cost. However, in the vacuum desiccator, it is not clearly shown what kind of spacer is used in combination with the O-ring, and the spacer cannot be specifically manufactured.

Problems to be solved by the invention

  The present invention has been made in order to eliminate the above-mentioned drawbacks. It is airtight and can maintain a vacuum or a reduced pressure atmosphere over a long period of time. After maintaining the vacuum or the reduced pressure atmosphere, the upper lid is opened. Furthermore, it is an object of the present invention to provide a vacuum desiccator that eliminates the need to perform operations such as heating and tapping, can be easily removed, and can be easily removed.

Means for solving the problem

  The present inventor has earnestly researched a vacuum desiccator that is airtight and does not impair the degree of decompression over a long period of time and that can be easily opened and closed, and can be easily manufactured from an existing vacuum desiccator. If a Teflon layer is provided between the thin layers of silicon grease applied to the surface, when the pressure inside the desiccator is reduced, the top lid and the desiccator body will be in close contact, the Teflon layer will be compressed, and some silicone grease will surround the Teflon layer. It was found that the inside of the desiccator was kept airtight with higher accuracy by the extruded silicone grease, and the present invention was completed.

That is, the present invention provides: (1) a vacuum having a desiccator body having an opening with a sliding surface provided on the upper surface, and an upper lid provided with a sliding surface closely contacting the sliding surface of the opening of the desiccator body. in a desiccator, about the vacuum desiccator, wherein the sealing member is secured or removably attached between the sliding mating surfaces of the lapping surface and the upper cover of the opening of the desiccator body. Preferably, (2) sealing member, said characterized in that it is provided through a thin layer of grease applied to the sliding mating surface of the sliding mating surface and / or the upper cover of the opening of the desiccator body (1 relates vacuum desiccator described), that (3) sealing member has a smooth surface, small nearly same shape or than the shape of the opening lapping surface of the desiccator body and / or the lapping surface of the upper cover relates vacuum desiccator described above, wherein (1) or (2), (4) sealing member according to any one of (1) to (3), characterized in that a fluorine resin sheet relates vacuum desiccator, (5) sealing member is related to the vacuum desiccator as described in (4), characterized in that it consists of two stacked fluorine resin sheet.

Moreover, this invention has (6) the desiccator main body which has the opening part by which the sliding surface was provided in the upper surface, and the upper cover by which the sliding surface closely_contact | adhered to the sliding surface of the opening part of this desiccator main body was provided. The vacuum desiccator is provided between the sliding surface of the opening of the desiccator body and the sliding surface of the upper lid, and has a smooth surface that does not impair the degree of decompression inside the vacuum desiccator during decompression. about the sealing member to be. Preferably, (7) The sealing member according to (6) above , which is substantially the same as or smaller than the shape of the opening sliding surface and / or the upper lid sliding surface , (8) made of fluororesin about the sealing member according to the above (6) or (7), characterized in that it consists of a sheet.

  As the vacuum desiccator of the present invention, a vacuum having a desiccator body having an opening portion provided with a sliding surface on the upper surface and an upper lid provided with a sliding surface closely contacting the sliding surface of the opening portion of the desiccator body. In the desiccator, it is not particularly limited as long as a sealing member is fixed or detachably mounted between the sliding surface of the opening of the desiccator body and the sliding surface of the upper lid, preferably, The sealing member is provided via a thin layer of grease applied to the sliding surface of the opening of the desiccator body and / or the sliding surface of the upper lid, and the sealing member has a smooth surface. The shape of the opening sliding surface of the desiccator body and / or the shape of the sliding surface of the upper lid is preferably substantially the same or smaller, and the sealing member is Teflon (trade name). Is preferably one made of a fluorine resin sheet and the like, more preferably is preferably made of two-ply fluorocarbon resin sheet.

  The sealing member of the present invention is a vacuum desiccator having a desiccator body having an opening portion provided with a sliding surface on the upper surface, and an upper lid provided with a sliding surface closely contacting the sliding surface of the opening portion of the desiccator body. As long as it has a smooth surface that is disposed between the sliding surface of the opening of the desiccator body and the sliding surface of the upper lid and does not impair the degree of decompression inside the vacuum desiccator during decompression, It is not particularly limited, and is preferably substantially the same as or smaller than the shape of the opening sliding surface and / or the upper lid sliding surface, and is made of a fluororesin sheet such as Teflon (trade name). Is.

  According to the vacuum desiccator of the present invention, since the sealing member is provided between the sliding surface of the desiccator main body opening and the upper lid so as to be fixed or detachable, the inside of the desiccator is depressurized and the external pressure is applied to the upper lid and the desiccator main body. When a load is applied, the sealing member is appropriately compressed to maintain airtightness, and acts as a packing, and can improve the airtightness in cooperation with a thin layer of grease. When the sheet is made of sheet, as the sheet is compressed, some grease is pushed out around the sheet, and this pushed-out grease makes it possible to hold the interior of the desiccator with higher accuracy and reduce the pressure. The state is maintained for a long time, and the degree of vacuum is not impaired. And even after maintaining a vacuum or reduced pressure state for a long period of time, the upper lid can be easily removed. In particular, when two sheets of fluororesin are used, they can be easily opened and closed with a small force. The workability can be remarkably improved.

  The sealing member is preferably substantially the same as or smaller than the shape of the opening sliding surface of the vacuum desiccator or the upper lid sliding surface. When the sealing surface of the opening of the desiccator body and the sliding surface of the upper lid are pressed, if the sealing member is larger than the sliding surface, the sealing effect by the grease is reduced.

  When a fluororesin sheet is used as the sealing member, the thickness is preferably about 0.05 to 0.2 mm, particularly about 0.1 mm from the viewpoint of sealing performance and mechanical strength. What has is more preferable. Further, the shape of the fluororesin sheet is not particularly limited, but in terms of airtightness and ease of removal, a ring shape that is substantially the same shape as the sliding surface of the opening and the upper lid can be suitably exemplified. In this case, one or two or more concentric continuous or non-continuous circumferential grooves can be provided.

  In addition, the grease used in the present invention is preferably a low vapor pressure silicone grease containing silicone as a main component and added with a filler to form a grease. Moreover, it is preferable to form the thin layer of silicone grease by using an amount sufficient to fill the minute irregularities on the sliding surface of the opening and the upper lid. A fluororesin sheet can be easily attached on the thin layer of the silicone grease thus formed.

A preferred embodiment of the vacuum desiccator of the present invention will be described with reference to the drawings.
1 is an exploded perspective view of the vacuum desiccator of the present invention, FIG. 2 is a partial longitudinal sectional view of the vacuum desiccator of the present invention, and FIGS. 3 and 4 are plan views of a fluororesin sheet used in the vacuum desiccator of the present invention. FIG.
As shown in FIG. 1, the vacuum desiccator of the present invention includes a desiccator body 1 and an upper lid 2 that is a lid of the desiccator body 1. The desiccator body 1 is a container for storing articles to be maintained in a vacuum or reduced pressure atmosphere. The lower part is provided with an eye plate 1d, and the upper part is provided with an opening 1a that forms an opening for taking in and out stored articles. The portion in contact with the upper lid 2 of the opening 1a is a sliding surface 1b. On the other hand, the upper lid 2 is provided with a ring-shaped sealing portion 2a having the same diameter as the opening 1a of the desiccator body 1 in contact with the opening 1a of the desiccator body 1, and the opening of the desiccator body 1 of the sealing portion 2a. The sliding surface 2b is formed in the part which contacts the sliding surface 1b of the part 1a. The upper lid 2 is provided with a suction port 2c connected to a suction device (not shown).

  As shown in FIG. 2, a thin layer 4 of silicon grease is applied to each of the sliding surface 1b of the desiccator body 1 and the sliding surface 2b of the upper lid 2, and Teflon or the like is applied to each thin layer. Each of the fluororesin sheets 3 is adhered. As shown in FIG. 1, as the fluororesin sheet, in addition to the fluororesin sheet 3 having substantially the same shape as the sliding surfaces 1b and 2b, as shown in FIG. 3, the inner peripheral sheet 5a on the sliding surfaces 1b and 2b. And a fluororesin sheet set 5 composed of the outer peripheral sheet 5b and, as shown in FIG. 4, two concentric non-continuous circumferential grooves 6a are provided on the fluororesin sheet having substantially the same shape as the sliding surfaces 1b and 2b. A grooved fluororesin sheet 6 can be used. In the case of the grooved fluororesin sheet 6, the thickness is preferably slightly thicker than the thickness of the grooveless fluororesin sheet 3 or the like.

The operation of such a vacuum desiccator will be described.
Silicone grease is thinly applied to the sliding surface 1b of the opening 1a of the desiccator body 1 to form a thin layer 4 of silicone grease, and then a fluororesin sheet 3 is adhered. On the other hand, after thinly applying silicone grease to the sliding surface 2b of the sealing portion 2a of the upper lid 2 to form a thin layer 4 of silicone grease, a fluororesin sheet 3 is adhered. After a predetermined article is stored in the desiccator main body 1, the upper lid 2 is covered, and the desiccator main body 1 and the upper lid 2 are brought into contact with and contacted with the fluororesin sheets 3 adhered through a thin layer 4 of silicone grease. To do. Thereafter, suction is performed by a suction device connected to the suction port 2c, and the inside of the desiccator is made a reduced pressure atmosphere. At this time, due to the reduced pressure in the desiccator, the upper lid 2 and the desiccator body 1 are brought into close contact with each other, the fluororesin sheet 3 is compressed, and the inside of the desiccator can be kept airtight. In particular, the fluororesin sheet 3 is compressed, and some silicone grease is pushed out from the bottom of the fluororesin sheet 3 to the periphery of the fluororesin sheet 3, and the extruded silicone grease increases the airtightness inside the desiccator. Higher accuracy is maintained.

  Apply a thin layer of silicone grease to the sliding surface of the glass desiccator body and top lid of the glass vacuum desiccator to form a thin layer of silicone grease, and then adjust the sliding surface from a 0.1 mm thick Teflon sheet. The two Teflon sheets prepared in this manner were attached to a thin layer of silicone grease applied to the sliding surfaces of the desiccator body and the upper lid, respectively. Next, after covering the desiccator body with an upper lid and wiping off the silicone grease adhering to the outer periphery of the Teflon sheet, the pressure inside the desiccator was reduced to about 15 Pa by a suction device and the suction port cock was closed. A small amount of silicone grease extruded was observed. When the pressure inside the desiccator after 5 days was examined, it was about 15 Pa, the same as the pressure before leaving. Thereafter, when the upper lid was removed, the upper lid and the desiccator main body were easily separated from the contact surface between the Teflon sheets, and it was confirmed that the removal was easy.

Effect of the invention

  According to the vacuum desiccator of the present invention, the vacuum or reduced pressure atmosphere can be maintained over a long period of time, and the upper lid can be easily opened when the upper lid is opened after maintaining the vacuum or reduced pressure atmosphere. Workability can be remarkably improved.

  It is a disassembled perspective view of the vacuum desiccator of this invention.   It is a partial longitudinal cross-sectional view of the vacuum desiccator of this invention.   It is a top view of the sealing member of the other aspect used for the vacuum desiccator of this invention.   It is a top view of the sealing member of the other aspect used for the vacuum desiccator of this invention.   It is a perspective view of the conventional vacuum desiccator.

DESCRIPTION OF SYMBOLS 1 …… Desicator main body 1a …… Opening portion 1b …… Sliding surface 2 …… Upper lid 2a …… Sealing portion 2b …… Sliding surface 2c …… Suction port 3 …… Sheet made of fluororesin such as Teflon (sealing member) )
4 ... Thin layer of silicone grease 5 ... Fluororesin sheet set 6 ... Fluororesin sheet with groove

Claims (3)

An opening of the desiccator body having a desiccator body having an opening portion provided with a sliding surface on an upper surface and an upper lid provided with a sliding surface closely contacting the sliding surface of the opening portion of the desiccator body. A sealing member made of a fluororesin sheet having a thickness of 0.05 to 0.2 mm is attached between the sliding surface of the portion and the sliding surface of the upper lid so as to be fixed or detachable. Features a vacuum desiccator.
2. The vacuum desiccator according to claim 1, wherein the sealing member is provided via a thin layer of grease applied to the sliding surface of the opening of the desiccator body and / or the sliding surface of the upper lid.
The desiccator body opening of the vacuum desiccator having a desiccator body having an opening provided with a sliding surface on the upper surface and an upper lid provided with a sliding surface closely contacting the sliding surface of the opening of the desiccator body. The degree of pressure reduction in the vacuum desiccator during decompression is made of a fluororesin sheet having a thickness of 0.05 to 0.2 mm, which is disposed between the sliding surface of the upper lid and the sliding surface of the upper lid. A sealing member characterized by having a smooth surface that does not impair the surface.

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