JP2719150B2 - Incubator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a thermostat for performing a heat resistance test, a heat treatment, and the like on various products, parts thereof, various materials, and the like.

[Conventional technology]

Conventionally, this type of thermostat has the following sealing means to prevent the high-temperature gas inside the thermostat from leaking out between the thermostat door and the main body. That is, as shown in FIG. 6, a high-temperature heat-resistant gasket in which glass fiber or ceramic fiber is wound with ceramic paper, ceramic cloth or stainless steel mesh.
1S is disposed around the inner surface of the incubator door 6 and fixed with screws, rivets or the like, and a sealing material S2 made of silicon rubber or the like having a relatively low heat-resistant temperature is additionally provided on the outer peripheral portion of the gasket S1, and the door 6 When the gasket S1 and the sealing material S2 are brought into contact with the thermostat main body 1 when closed, the gasket S1 shown in FIG. 6 is replaced with a string-shaped gasket knitted with ceramic fiber or glass fiber As shown in FIG. 7, the gap G between the opposing surfaces of the door 6 and the main body 1 is reduced to prevent hot air leakage.

[Problems to be solved by the invention]

However, since the gasket in the above-mentioned sealing means does not have elasticity by itself, there is a problem that when the door is repeatedly opened and closed, the gasket is gradually shrunk and damaged, and there is a problem that these gaskets are expensive.

In the case of the above-mentioned sealing means, in order to make the gap between the door 6 and the main body 1 to be a predetermined one, precise assembly and adjustment are required. Since they face each other directly and approach each other, the mating surfaces may be damaged during use of the incubator, and the sealing effect may be reduced. Further, of course, hot air leaks cannot be safely prevented and considerable hot air leaks must be tolerated.

Therefore, an object of the present invention is to provide a thermostat that can prevent the leakage of hot air in the thermostat from the space between the door and the thermostat main body to a practically satisfactory level for a long period of time, and that can be easily and inexpensively prevented. .

[Means for solving the problem]

According to the present invention, there is provided a hot air seal made of an elastic thin plate which is supported by one of a thermostat door and a thermostat main body and which comes into contact with the other of the door and the main body under elastic restoring force when the door is closed. The seal portion itself and one of the door and the main body supporting the seal portion form an opening directed toward the inside of the thermostat when the door is closed, and Is formed in the inner space portion from the opening when the door is closed. A thermostat (a first type thermostat), which is supported by one of a thermostat door and a thermostat main body, and is elastically restored to the other of the door and the main body when the door is closed. Hot air made of elastic thin plate in contact with force A sealing portion, wherein the sealing portion is formed to be bent from the elastic thin plate, and has an opening directed toward the inside of the incubator when the door is closed, and an inner space portion following the opening. A thermostatic chamber (second type thermostatic chamber) characterized in that the thermostatic chamber is a seal section which is pressed against the other of the door and the main body under the atmospheric pressure when gas in the thermostatic chamber enters the inner space.
I will provide a.

Examples of the elastic thin plate forming the hot air sealing portion include various elastic metal thin plates (for example, stainless steel thin plates) and thin plates or membranes made of carbon fiber.

(Operation)

In any of the thermostats according to the present invention, when the thermostat door is closed, the hot air seal portion supported by any one of the door and the thermostat main body is slightly bent or deformed while the hot air seal portion is closed. It contacts the other of the bodies under elastic restoring force.

In the first type thermostat, at the time of closing the door, the seal portion is opened from the opening formed by itself and one of the door and the main body supporting the seal portion, and the inner portion following the opening. When the gas in the thermostat enters the space, it is pressed against the other of the door and the main body under the pressure.

In the second type thermostat, at the time of closing the door, the seal portion is configured to allow the gas in the thermostat to enter the inner space portion that follows from the opening, and thereby the other of the door and the main body under the atmospheric pressure. Pressed to the thing.

Thus, in any of the first and second types of thermostats, in addition to the elastic restoring force, the air pressure also contributes to the pressing contact of the seal portion, and thus, it is possible to easily and reliably prevent the external leakage of hot air in the thermostat. .

Further, since the seal portion has a simple structure and is not easily damaged, it is possible to prevent the leakage of hot air in the thermostat to a practically satisfactory level for a long period of time, and furthermore, it is possible to prevent the leak easily and inexpensively.

〔Example〕

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

FIG. 1 shows a schematic cross section of a thermostat of one embodiment, and FIG. 2 shows an enlarged view of a seal portion between a door and a thermostat main body.

This thermostat is provided with a heater 3 and a blower 4 in a thermostat 2 in a main body 1, and a high-temperature gas heated to 500 to 700 ° C. or more by the heater causes the inside of the bath to be operated by the blower 4. Circulate.

The body opening 5 is opened and closed by a door 6 hinged to the body.

The front surface of the main body 1 surrounding the opening 5 is composed of a vertical surface 11, an inclined surface 12 extending to the inside of the tank following the surface, and a vertical surface 13 continuing to the inclined surface.

The inner surface of the door is the vertical surface 11, inclined surface 12, and vertical surface of the main body.
13, the vertical surface 61, the inclined surface 62, and the vertical surface 63 facing each other.
It has.

Two hot air seal portions 7 and 81 are provided between the main body 1 and the door 6.
Is provided.

The seal part 7 is the same as the conventional gasket S1,
It is made of a high-temperature heat-resistant gasket in which ceramic fibers or glass fibers are wound with ceramic paper or stainless steel mesh (in this example, ceramic fibers are wound with stainless steel mesh).
The seal portion 7 is provided over the entire periphery of the door surface 63 so as to surround the main body opening 5.
To prevent hot air leakage.

As shown in FIG. 2, the seal portion 81 is made of a stainless steel thin plate. The seal portion 81 has a cross-sectional shape of "H" to "K" in which one end 811 is fixed to the door inclined surface 62 with a screw or the like (not shown).
It can be contacted under elastic restoring force while slightly bending to 2. In addition, the seal portion 81 forms an opening 813 that is directed toward the inside of the incubator when the door is closed, and forms an inner space portion 814 that follows the opening with the door inclined surface 62 that supports the seal portion. When opening the door, the inside space from the opening 813
When the gas in the thermostat enters 814, it is pressed against the main body inclined surface 12 under the atmospheric pressure.

Thus, in addition to the elastic restoring force, the air pressure also changes
, Thereby preventing leakage of hot air in the thermostat from between the seal portion 81 and the inclined surface 12 of the main body.

As described above, according to this thermostat, when the door is closed, the seal portions 7 and 81 come into contact with the main body to prevent hot air leakage. Even if the seal portion 7 is broken during repeated use of the thermostat and the door 6 is repeatedly opened and closed, the seal portion 81 made of an elastic stainless steel thin plate is not easily broken, and a desired hot air seal is continuously performed. Can be.

The seal portion 81 is provided over the entire inner surface of the door so as to surround the opening 5 of the main body, but as shown in FIG. 3, a portion where the horizontally extending portion 81a and the vertically extending portion 81b meet when the door is closed. When pressed against, is calculated and cut in advance just to form a seal line L.

It should be noted that such a seal line L is not always required to be formed in a thermostat in which a small amount of hot air leakage is allowed, and hot air leakage from the meeting portion may be allowed. However, generally speaking, it is desirable that the hot air allowable portion is within a range where there is no danger to the operator of the incubator.

Instead of the hot air sealing section 81, another type of hot air sealing section can be adopted. Examples are shown in FIG. 4 and FIG. Each of these seal portions is formed from a stainless steel thin plate.

The seal portion 83 shown in FIG. 4 has one end 831 fixed to the door inclined surface 62 and the other end 832 substantially in contact with the main body inclined surface 12. This seal portion 83 is similar to the seal portion 81, and includes a seal inclined portion 62 that supports the seal portion and itself.
When the door is closed, an opening 833 directed to the inside of the thermostat is formed, and an inner space 834 following the opening is formed.When the gas in the thermostat enters the inner space 834 from the opening 833 when the door is closed, the air pressure is reduced. It is pressed down by the body inclined surface 12. Thus, similarly to the seal portion 81, it is possible to prevent hot air leakage.

The seal portions 81 and 83 shown in FIG. 2 and FIG.
For example, it may be provided on the door vertical surface 61 so as to contact the main body vertical surface 11.

The seal portion 87 shown in FIG.
1 is fixed to the door vertical surface 61, and when the door is closed, it can be fitted and contacted with a recess 112 provided in the main body vertical surface 11 under elastic restoring force.

More specifically, the seal portion 87 is bent from a stainless steel thin plate and has a circular cross section as described above, and has an opening 87 that is directed toward the inside of the thermostat when the door is closed.
2 and an inner space 873 following the opening 872, and when the gas in the thermostat enters the inner space 873 from the opening 872 when the door is closed, it is pressed against the surface of the recess 112 under the pressure.

Thus, in addition to the elastic restoring force, the air pressure also
, Thereby preventing external leakage of hot air in the thermostat.

5 can be provided on other portions, for example, on the inclined surface 62 of the door. In this case, a fitting recess for the seal portion is provided on the main body slope 12.

It should be noted that the present invention is not limited to the above-described embodiment, but can be implemented in various other modes.

For example, in each of the above embodiments, the seal portion is supported by the door 6, but this may be supported by the main body 1 side.

〔The invention's effect〕

As described above, according to the present invention, there is provided a thermostat that can prevent the leakage of hot air in the thermostat from the space between the door and the thermostat main body to a practically satisfactory level for a long period of time, and that can be easily and inexpensively prevented. can do.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of one embodiment of the present invention, and FIG.
FIG. 3 is an enlarged explanatory view of a sealing portion in the thermostat shown in FIG. 3, FIG. 3 is an explanatory view of a sealing state of a portion where a horizontal portion and a vertical portion of a sealing portion made of an elastic thin plate meet, and FIGS. FIGS. 6 and 7 are explanatory diagrams of another example of the seal portion, and are explanatory diagrams of a conventional example. 1 ... thermostat body 6 ... doors 81, 83, 87 ... hot air seals made of elastic thin plates 813, 833, 872 ... openings in the seals 814, 834, 873 ... inner space following the openings in the seals

Claims (2)

(57) [Claims] 1. An elastic thin plate hot air seal portion which is supported by one of a thermostat door and a thermostat main body, and which comes into contact with the other of the door and the main body under elastic restoring force when the door is closed. The seal portion is formed by itself and one of the door and the main body that supports the seal portion, and forms an opening directed toward the inside of the incubator when the door is closed, and the inside that follows the opening. A space portion is formed, and when the door is closed, the gas in the thermostat enters the inside space portion from the opening to be a seal portion pressed against the other of the door and the main body under the atmospheric pressure. Characterized thermostat. 2. A hot air seal portion made of an elastic thin plate which is supported by one of a thermostat door and a thermostat main body, and comes into contact with the other of the door and the main body under elastic restoring force when the door is closed. The seal portion is formed to be bent from the elastic thin plate and has an opening directed to the inside of the thermostat when the door is closed and an inner space portion following the opening, and from the opening to the inner space portion when the door is closed. A thermostatic chamber characterized in that the thermostatic chamber is a seal part which is pressed against the other of the door and the main body under the atmospheric pressure when gas in the thermostatic chamber enters.