JP6755846B2 - Environment forming device and through hole structure - Google Patents

Description

The present invention relates to an environment forming device that forms a desired environment in a room. In particular, the present invention relates to an environment forming device having a through hole penetrating a heat insulating wall.
The present invention also relates to a through-hole structure attached to a through-hole formed in a heat insulating wall.

As an example of an environment forming device, an environmental test device is known, which is a device for examining the performance and durability of products and parts such as electric devices as objects to be tested. The environmental test apparatus has a test chamber, and can artificially create a predetermined environment such as a temperature environment (for example, high temperature or low temperature) or a humidity environment (for example, high humidity or low humidity) in the test chamber. It is a thing.

As one form of the environmental test apparatus, there is one having a housing covered with a heat insulating wall and having an air conditioner inside the housing. In addition, many environmental test devices have a blower.
The blower is installed for the purpose of eliminating variations in temperature and humidity in the test chamber and for circulating air between the area where the air conditioner is installed and the test chamber.
The blower is generally driven by a motor.

As described above, the environmental test apparatus artificially creates a high temperature environment, a low temperature environment, a high humidity environment, and the like. Here, in general, the usage environment that a motor can withstand is limited, and when a general motor is used in a high temperature environment, a low temperature environment, or a high humidity environment, its life is significantly shortened and it breaks down early. In some cases.
Therefore, like the environmental test apparatus disclosed in Patent Document 1, a structure is adopted in which the motor is installed outside the housing covered with the heat insulating wall, and the blades installed in the housing are rotated from the outside through the shaft through the heat insulating wall. May be done.
Further, Patent Document 1 discloses a means for forming a hole through which the shaft is inserted.

According to Patent Document 1, in the conventional environmental test apparatus, a through hole is formed in the heat insulating wall 201 by using the through hole forming member 200 as shown in FIG.
The through hole forming member 200 has flanges 203 and 205 attached to both ends of the pipe 202. According to Patent Document 1, the pipe 202 and the flanges 203 and 205 are joined by a sealing material, and airtightness between the two is ensured.

However, the air pressure in the test chamber 207 changes due to opening and closing the door of the environmental test apparatus, and the inner wall 208 on the test chamber 207 side of the heat insulating wall 201 moves, so that the pipe 202 and the flanges 203 and 205 are separated from each other. A pulling force may be generated, and the sealing material may be cut and the airtightness may be impaired. As a result, there was a concern that the air in the test chamber 207 would leak into the heat insulating wall 201.
For example, when the inside of the test chamber 207 is filled with steam, the steam may spread in the heat insulating wall 201 and water may be accumulated in the heat insulating wall 201.

Japanese Unexamined Patent Publication No. 2010-19478

In addition to the problems described in Patent Document 1, the wall surface of the heat insulating wall 201 is moved by the inner wall 208 of the heat insulating wall 201 on the test room 207 side due to a sudden change in the temperature of the test room 207. There is also a concern that the sealing material between the flanges 203 and 205 may be cut off and the airtightness may be impaired.

Focusing on the above-mentioned problems of the prior art, it is an object of the present invention to provide an environment forming apparatus provided with a through hole having a higher airtightness to a heat insulating wall and a through hole component to be attached to the through hole. Is.

The invention according to claim 1 for solving the above-mentioned problems has a housing having a heat insulating wall at least partially, and the heat insulating wall is a space between wall materials formed between facing wall materials. In an environment forming device having a structure in which a heat insulating material is provided and having a through hole portion penetrating the heat insulating wall, the through hole portion includes a through hole forming member, the wall material, and the through hole forming member. The through hole forming member has a pipe portion forming an inner wall of the through hole portion and a flange portion having a wall surface facing region facing at least one of the wall materials. A seal arrangement portion is provided in the wall surface facing region, and the seal member has a line portion surrounding the open end of the pipe portion, and the line portion relates to the main seal portion and the main seal portion. It has an auxiliary seal portion that projects to the outer side and / or the inner side, the auxiliary seal portion is thinner than the main seal portion, and the seal member is attached to the seal arrangement portion. When the seal member is installed and no external force is applied to the seal member, the main seal portion protrudes from any part of the wall surface facing region, and the auxiliary seal portion has the same protruding position as a part of the wall surface facing region. The through hole forming member is installed on the wall material in a state where the main seal portion is pressed against the wall material or at least protrudes from any portion of the wall surface facing region. It is an environment forming device.

In the environment forming apparatus of the present invention, an airtightness between the flange portion and the wall material is ensured by using a sealing member having a unique configuration, and air or the like in the housing is prevented from entering the inside of the heat insulating wall. I'm out.
Unlike the sealing material, the sealing member used in the present invention is solid and has a certain shape.
The seal member used in the present invention has a main seal portion and an auxiliary seal portion that projects outward and / or inward side with respect to the main seal portion.
Further, in the present invention, the seal member is installed in the seal arrangement portion of the through hole forming member, and when no external force is applied to the seal member, the main seal portion of the seal member is located from any portion of the flange portion facing the wall surface. Also protrudes. Therefore, when the flange portion is pulled toward the wall material side of the housing with a screw or the like, the main seal portion comes into contact with the wall material of the housing.
The seal member used in the present invention has an auxiliary seal portion, and the auxiliary seal portion is thinner than the main seal portion. The auxiliary seal portion has the same protruding position as a part of the wall surface facing region of the flange portion, or protrudes from any portion of the wall surface facing region.
Therefore, if the flange portion is strongly attracted to the wall material side of the housing, the auxiliary seal portion comes into contact with the wall material, and the torque required for tightening the screws or the like increases, making further tightening difficult.
Therefore, excessive tightening of the flange portion is suppressed, and the sealing member is rarely crushed.

The invention according to claim 2 is the environment forming apparatus according to claim 1, wherein the main seal portion has a substantially circular cross-sectional shape, and the auxiliary seal has a flat cross-sectional shape.

Since the cross-sectional shape of the main seal portion is substantially circular, the sealing property is high. Since the cross-sectional shape of the auxiliary seal is flat, the force required for compression is large and it is difficult to be crushed.

The auxiliary seal portion may be in contact with the wall material (claim 3).

The invention according to claim 4 is characterized in that the flange portion is fixed to the wall material by a fastening element having a shaft portion, and the line portion surrounds the outside of the shaft portion. The environment forming apparatus according to any one.

In the present invention, the flange portion is fixed to the wall material by a fastening element having a shaft portion such as a screw.
In the environment forming apparatus of the present invention, since the line portion of the seal member surrounds the outside of the shaft portion, the shaft portion is in the region surrounded by the seal member. Therefore, the screw insertion hole or the like through which the shaft portion is inserted is also within the region surrounded by the seal member, and airtightness is ensured.

According to the fifth aspect of the present invention, the contour shape when the seal member is viewed from the front is obtained from the basic contour portion located at the open end of the pipe portion when mounted on the flange portion and the basic contour portion. The environment forming apparatus according to claim 4, further comprising an overhanging portion overhanging to the outside, and at least a part of the fastening element is arranged on the overhanging portion.

In the environment forming apparatus of the present invention, the seal member has a foundation contour portion located at the open end of the pipe portion and an overhanging portion protruding outward from the foundation contour portion. At least a part of the fastening element for fixing the flange portion is arranged on the overhanging portion. Therefore, the screw insertion hole or the like through which the fastening element is inserted is also within the area surrounded by the seal member, and airtightness is ensured.

In the invention according to claim 6, the flange portion has a threaded portion on which a female screw or a male screw is formed, the threaded portion does not penetrate the flange portion, and the flange portion has a separately prepared screw or nut. The environment forming apparatus according to any one of claims 1 to 5, wherein the environment forming device is fixed to the wall material via the same.

In the environment forming apparatus of the present invention, the flange portion has a threaded portion, but the threaded portion does not penetrate the flange portion.
Therefore, the threaded portion is highly airtight.

In the invention according to claim 7, the flange portion communicates with the pipe portion and has a protruding portion protruding from the wall surface facing region, and the protruding portion is engaged with an opening of the wall portion. The environment forming apparatus according to any one of claims 1 to 6, characterized in that.

The through-hole forming member used in the present invention has a protruding portion on the flange portion that communicates with the pipe portion, and the protruding portion is engaged with the opening of the wall portion. Therefore, the environment forming apparatus of the present invention can be easily positioned when the through hole forming member is attached.

The invention relating to the structure of the through-hole portion is a through-hole structure attached to a through-hole portion formed in a heat insulating wall having facing wall materials, wherein the through-hole structure is a through-hole forming member and the wall material. It has a seal member interposed between the through hole forming member and the through hole forming member, and the through hole forming member faces a pipe portion forming an inner wall of the through hole portion and a wall surface facing at least one of the wall materials. It has a flange portion having a region, a seal arrangement portion is provided in the wall surface facing region, the seal member has a line portion surrounding the open end of the pipe portion, and the line portion includes a main seal portion. The auxiliary seal portion has an auxiliary seal portion protruding to the outer side and / or the inner side with respect to the main seal portion, the auxiliary seal portion is thinner than the main seal portion, and the seal member is When the seal member is installed in the seal arrangement portion and no external force is applied to the seal member, the main seal portion protrudes from any part of the wall surface facing region, and the auxiliary seal portion is one of the wall surface facing regions. The through hole forming member is installed in the wall material in a state where the protrusion position is the same as that of the portion or the portion protrudes from any portion of the wall surface facing region and at least the main seal portion is pressed against the wall material. It is characterized by that.

The through-hole structure of the present invention is recommended as a configuration for attaching to a through-hole formed in, for example, an environment forming device.

The environment forming device of the present invention has a through hole through which a shaft of a blower or the like is inserted in the heat insulating wall of the housing, and the airtightness of the through hole with respect to the heat insulating wall is high.
Further, the through-hole constituent member of the present invention is highly airtight.

It is explanatory drawing which conceptually explained the cross section of the environmental test apparatus of embodiment of this invention from the side view. It is an enlarged sectional view of a part of the heat insulating wall of the environmental test apparatus of FIG. It is an exploded perspective view which observed the heat insulating wall of FIG. 2 from the inner side wall material side. It is an exploded perspective view which observed the heat insulating wall of FIG. 2 from the outer wall material side. (A) is a side view of a through hole forming member used in the environmental test apparatus of FIG. 1, (b) is a front view thereof, (c) is a rear view thereof, and (d) is a cross-sectional view thereof. Is. (A) is a front view of the inner seal member, (b) is an enlarged cross-sectional perspective view thereof, and (c) is an enlarged cross-sectional view taken along the line AA of (a). (A) is a front view of the outer seal member, (b) is a cross-sectional enlarged perspective view thereof, and (c) is a cross-sectional enlarged view of (a) BB. (A), (b) and (c) are a cross-sectional view showing the behavior when the through hole forming member is attached to the inner inner wall and a partially enlarged view thereof. It is an exploded perspective view which observed the heat insulating wall of the environmental test apparatus of another embodiment of this invention from the inner side wall material side. (A) and (b) are sectional views of the heat insulating wall of the environmental test apparatus of another embodiment of the present invention. It is an enlarged sectional view of a part of the heat insulating wall of the environmental test apparatus of the prior art.

Hereinafter, embodiments of the present invention will be further described.
The environmental test apparatus 1 of the embodiment of the present invention is characterized by a through hole portion 5 through which the shaft 3 of the blower 2 is inserted. Prior to the explanation of the feature portion, the outline of the environmental test apparatus 1 will be briefly described.
As shown in FIG. 1, the environmental test apparatus 1 of the embodiment of the present invention has a housing 7 covered with a heat insulating wall 6 in the same manner as the known one. An opening 13 is provided on the front surface of the housing 7, and a door 10 is provided in the opening 13. Inside the housing 7, there is a space that functions as a test room 8.
The housing 7 has an inner housing 11 made of stainless steel or the like and an outer housing 12 made of steel plate or stainless steel or the like, and a heat insulating material 15 such as glass wool is built in the space between the two. Is.
Therefore, the heat insulating wall 6 has a structure in which a heat insulating material 15 such as glass wool is provided in the space 22 between the wall materials 20 and 21 facing each other.
For convenience of explanation, the wall material 20 on the test chamber 8 side, which is a part of the inner housing 11, is referred to as an inner side wall material 20, and is a part of the outer housing 12 and constitutes the outer shell of the housing 7. The wall material 21 may be referred to as an outer wall material 21.

In the present embodiment, the heat insulating tank 25 is formed by the housing 7 and the door 10. There is a partition 26 inside the heat insulating tank 25, which is largely divided into a test room 8 and an air conditioning unit 27.
The partition 26 has ventilation openings 30, 31, and 32 at the upper and lower ends and in the center, and the test chamber 8 and the air conditioning unit 27 are communicated with each other by the ventilation openings 30, 31, 32.
In the present embodiment, the central ventilation opening 31 functions as an air blowing portion for blowing air from the air conditioning unit 27 to the test chamber 8, and the ventilation openings 30 and 32 provided at the upper and lower ends are inside the test chamber 8. It functions as an air introduction unit that introduces air into the air conditioning unit 27.

An air conditioner 33 and a blower 2 are built in the air conditioner 27.
The air conditioner 33 is composed of a humidifying device 36, a cooling device 37, and a heating heater (heating device) 39. Since all of these devices are known, detailed description thereof will be omitted.
The blower 2 has a blade portion 40 and a drive motor 41, and the blade portion 40 is installed inside the housing 7 in the vicinity of the ventilation opening 31 in the center of the partition 26.
The drive motor 41 is located outside the housing 7, and both are connected by a shaft 3. The shaft 3 is inserted through a through hole 5 formed in the heat insulating wall 6.

When the blower 2 is started, the air in the test chamber 8 is introduced into the air conditioning unit 27 from the upper and lower ventilation openings (air introduction units) 30 and 32. Then, the air conditioner 27 is in a ventilation state, air comes into contact with the air conditioner 33 to exchange heat and adjust the humidity, and the adjusted air is blown into the test chamber 8 from the central ventilation opening (air blowout part) 31. ..
Further, a temperature sensor and a humidity sensor (not shown) are provided in the vicinity of the central ventilation opening (air blowing portion) 31.
When the environmental test device 1 is used, the blower 2 is operated to control the air conditioner 33 so that the detected values of the temperature sensor and the humidity sensor approach the temperature and humidity of the set environment.

Next, the through-hole portion 5, which is a characteristic configuration of the present invention, will be described. The through hole portion 5 is a hole that penetrates the heat insulating wall 6 of the housing 7, and the shaft 3 of the blower 2 is inserted therethrough.
In the present embodiment, the through-hole portion 5 is composed of the through-hole forming member 50 as shown in FIG. 2, and the airtightness between the through-hole portion 5 and the wall members 20 and 21 is ensured by the seal members 51 and 52. It prevents the air in the housing 7 from leaking into the heat insulating wall 6.
For convenience of explanation, the seal member 51 interposed between the inner side wall member 20 and the through hole forming member 50 is referred to as an inner seal member 51, and a seal interposed between the outer wall member 21 and the through hole forming member 50. The member 52 may be referred to as an outer seal member 52.
Further, as auxiliary members, a packing retainer 43 and a packing material 45 are used.

As shown in each figure, the through hole forming member 50 is provided with flange portions 55 and 56 at both ends of the pipe portion 53. The through hole forming member 50 is installed in the space between wall materials 22 formed between the wall materials 20 and 21, and one flange portion 55 is located on the side of the space 22 between wall materials of the inner side wall material 20. Will be installed. For convenience of explanation, the flange portion 55 may be referred to as a housing-side internal flange portion 55. The other flange portion 56 is installed on the wall material space 22 side of the outer wall material 21. For convenience of explanation, the flange portion 56 may be referred to as an outer flange portion 56.

The surface of the housing-side internal flange portion 55, except for the protruding wall 58 described later, functions as a wall surface facing region 28 (see FIG. 3).
As shown in FIG. 3, the housing-side internal flange portion 55 has a circular front view and has an opening 57 in the center that communicates with the pipe portion 53. The periphery of the opening 57 is covered with a protruding wall 58 that projects perpendicularly to the surface of the flange portion 55. The protruding wall 58 surrounds the opening 57 in an annular shape.
A seal arrangement portion 60 is provided on the outside of the protruding wall 58. The seal arrangement portion 60 is a concave groove, which is located on the outside of the protruding wall 58 and surrounds the opening 57 in an annular shape.
The surface of the inner flange portion 55 on the housing side, and the outer region of the seal arrangement portion 60 is flat, but female screw holes 61 for fixing the through hole forming member 50 to the inner side wall member 20 are provided at three places. There is.
The female screw hole 61 is a non-penetrating hole 62 as shown in FIG. 5 (d).
In the present embodiment, in order to secure a fitting margin for the female screw hole 61, a build-up portion 65 is provided on the back surface side of the flange portion 55, and the build-up portion 65 does not penetrate from the surface of the inner flange portion 55 on the housing side to the build-up portion 65. A hole 62 is provided.

Next, the outer flange side inner flange portion 56 will be described.
The entire surface of the outer flange portion 56 on the outer shell side functions as a wall surface facing region 98 (see FIG. 4).
As shown in FIG. 5C, the front shape of the outer flange portion 56 on the outer shell side is based on a circle and has ear portions 66 at three locations. The three ear portions 66 are all in the shape of a small arc and are arranged at equal intervals. That is, the outer flange portion 56 has a foundation circle portion (foundation contour portion) 38 divided into three, and a small arc-shaped ear portion (overhanging portion) protruding outward between the foundation circle portions (foundation contour portion) 38. ) 66.
A protruding wall 78 that protrudes perpendicularly to the surface of the outer flange portion 56 is provided in a region corresponding to the foundation circle portion 38, which is the outer peripheral end portion of the outer flange portion 56.
When the protruding wall 78 is viewed from the front, it has an arc shape, and the center of each arc coincides with the center of the circle at the opening end of the pipe portion 53. That is, the protruding wall 78 is installed concentrically with the open end of the pipe portion 53.
Further, a female screw hole 67 is formed in each ear portion 66. The female screw hole 67 is a non-penetrating hole 68 as shown in FIG. 5 (d).

The outer flange portion 56 also has an opening 71 in the center that communicates with the pipe portion 53.
In the outer flange portion 56, the periphery of the opening 71 is directly formed as a seal arrangement portion 72. That is, the protruding wall 78 provided at the outer peripheral end of the foundation circle 38 functions as a seal guide for preventing the outer seal member 52 from falling off, and substantially the entire surface of the outer flange portion 56 functions as the seal arrangement portion 72.

The pipe portion 53 is provided with a through hole 46 inside, and penetrates in the longitudinal direction.
There is a partition portion 90 inside the pipe portion 53 and in the vicinity of the outer flange portion 56 on the outer shell side. The partition portion 90 is a partition in which the inside of the pipe portion 53 is partially narrowed, and has a through hole 47 in the center. The region extending from the partition portion 90 to the inner flange portion 55 on the housing side is tapered in a direction in which the inner diameter increases toward the inner flange portion 55 on the housing side.
The region extending from the partition portion 90 to the outer flange portion 56 is a straight portion having the same inner diameter. The region extending from the partition portion 90 to the outer flange portion 56 functions as the packing insertion portion 48.

Next, the inner seal member 51 shown in FIG. 6 will be described.
The inner seal member 51 is formed of a flexible resin such as silicone rubber. The inner seal member 51 has a circular front view. That is, the inner seal member 51 is composed of a thin and thin line portion 73, and when the line portion 73 is observed as a whole, it has a circular shape.
The inner diameter of the central opening 76 of the inner sealing member 51 is slightly larger than the outer diameter of the circle formed by the protruding wall 58 of the inner flange portion 55 on the housing side.
The width of the line portion 73 of the inner seal member 51 is large enough to fit into the concave groove of the seal arrangement portion 60 of the inner flange portion 55 on the housing side.

The cross-sectional shape of the line portion 73 is the same for all portions, and as shown in FIG. 6C, there is a substantially circular main seal portion 75, and plate-shaped auxiliary seal portions 77 are provided on both sides thereof. ..
The auxiliary seal portion 77 projects on both the outer side and the inner side with respect to the main seal portion 75.
That is, the inner seal member 51 has a circular front view, and the auxiliary seal portion 77 has a fin-shaped outer auxiliary seal portion 77a protruding from the main seal portion 75 toward the outside of the circle and a fin toward the inside of the circle. It is composed of an inner auxiliary seal portion 77b overhanging in a shape.
The width F of the inner auxiliary seal portion 77b is wider than the width E of the outer auxiliary seal portion 77a.

The front surfaces and the back surfaces of the auxiliary seal portions 77 on both sides form the same plane.
The thickness A of the auxiliary seal portion 77 is thinner than the thickness B of the main seal portion 75. Since the auxiliary seal portion 77 projects from the center of the main seal portion 75 in the height direction (thickness direction) to the side surface side, the auxiliary seal portion 77 is assisted when the auxiliary seal portion 77 is placed on a horizontal floor surface without applying an external force. The height of the upper surface 100 of the seal portion 77 is lower than that of the top of the main seal portion 75, and the height of the lower surface 101 is higher than that of the lower portion of the main seal portion 75.
Further, the thickness B of the main seal portion 75 is larger than the depth C of the concave groove of the seal arrangement portion 60 described above. The height D from the floor surface to the upper surface 100 of the auxiliary seal portion 77 when the inner seal member 51 is placed on the horizontal floor without applying an external force is larger than the depth C of the concave groove of the seal arrangement portion 60.

Next, the outer seal member 52 shown in FIG. 7 will be described.
The outer seal member 52 is also molded of a flexible resin such as silicone rubber. The outer seal member 52 is based on a circle when viewed from the front, and has ear portions (overhanging portions) 80 formed at three locations.
The three ear portions 80 are all in the shape of a small arc and are arranged at equal intervals. That is, the outer seal member 52 has a foundation circular portion (foundation contour portion) 81 divided into three, and a small arc-shaped ear portion (overhanging portion) 80 between them.
That is, the outer seal member 52 is composed of a thin line portion 83, and when the line portion 83 is observed as a whole, the outer seal member 52 has a circular shape in which three portions protrude outward.
The central opening 85 of the outer seal member 52 is circular. That is, the outer shape of the outer seal member 52 is a circle having three convex portions, but the central opening 85 is a perfect circle or a shape close to it.

The cross-sectional shape of the line portion 83 differs depending on the portion. As a common point of the cross-sectional shape, as shown in FIG. 7C, there is a main seal portion 86 in each portion, and plate-shaped auxiliary seal portions 87 are provided on both sides thereof.
The auxiliary seal portion 87 projects on both the outer side and the inner side with respect to the main seal portion 86.
That is, the outer seal member 52 has a shape based on a circle when viewed from the front, and has a fin-shaped outer auxiliary seal portion 87a protruding from the main seal portion 86 toward the outside of the circle and a fin-shaped protrusion toward the inside. There is an inner auxiliary seal portion 87b.
The width H of the inner auxiliary seal portion 87b is larger than the width G of the outer auxiliary seal portion 87a.

The front surfaces and the back surfaces of the auxiliary seal portions 87 on both sides form the same plane.
The thickness J of the auxiliary seal portion 87 is thinner than the thickness I of the main seal portion 86.
Further, the thickness I of the main seal portion 86 is larger than the height K of the protruding wall 78 of the outer flange portion 56 on the outer shell side.
Since the auxiliary seal portion 87 projects from the center of the main seal portion 86 in the height direction (thickness direction) to the side surface side, the auxiliary seal portion 87 is assisted when the auxiliary seal portion 87 is placed on a horizontal floor surface without applying an external force. The height of the upper surface 103 of the seal portion 87 is lower than that of the top of the main seal portion 86, and the height of the lower surface 105 is higher than that of the lower portion of the main seal portion 86.
The height M from the floor surface to the upper surface 103 of the auxiliary seal portion 87 when the outer seal member 52 is placed on the horizontal floor without applying an external force is from the height K of the protruding wall 78 of the outer flange portion 56 on the outer shell side. Is also big.

The contour shape when the main seal portion 86 is viewed from the front is a shape along the outer edge of the outer shape of the outer seal member 52, which is based on a circle and has ear portions (overhanging portions) 80 at three locations. is there.
In the selvage portion (overhanging portion) 80 of the outer seal member 52, the inner auxiliary seal portion 87b is formed in a film shape in a wide range. The central opening 85 surrounded by the inner auxiliary seal portion 87b has a shape of a perfect circle or a shape close to it.

A through hole 88 is provided in the inner auxiliary seal portion 87b of the ear portion 80.
As described above, the through hole 88 is provided in the inner auxiliary seal portion 87b, and the through hole 88 is opened in the region surrounded by the main seal portion 86.
Further, when the outer seal member 52 is attached to the seal arrangement portion 72 of the outer outer flange portion 56, the through hole 88 of the outer seal member 52 communicates with the female screw hole 67 of the outer outer flange portion 56. Therefore, the female screw hole 67 of the outer flange portion 56 on the outer shell side is opened in the region surrounded by the main seal portion 86 of the outer seal member 52.

Next, the positional relationship between the heat insulating wall 6, the through hole forming member 50, the sealing members 51, 52, and the like will be described.
In the present embodiment, the inner seal member 51 is attached to the seal arrangement portion 60 of the inner flange portion 55 on the housing side. That is, the inner seal member 51 is fitted in the groove of the seal arrangement portion 60 of the inner flange portion 55 on the housing side.

Further, the outer seal member 52 is attached to the seal arrangement portion 72 of the outer shell side inner flange portion 56.
That is, the foundation circle portion (foundation contour portion) 81 of the outer sealing member 52 is arranged on the foundation circle portion (foundation contour portion) 38 of the outer shell side inner flange portion 56, and the arc-shaped protrusion provided on the outer shell side inner flange portion 56. The outer peripheral portion of the outer sealing member 52 is held by the wall 78.
Further, the selvage portion (overhanging portion) 80 of the outer sealing member 52 is arranged on the selvage portion (overhanging portion) 66 of the outer flange portion 56 on the outer shell side.
When the outer sealing member 52 is attached to the outer flange portion 56, the base circular portion 81 of the outer sealing member 52 is housed in a position concentric with the opening end of the pipe portion 53.

As described above, the heat insulating wall 6 has a structure in which the heat insulating material 15 is provided in the space between the wall materials 22 formed between the wall materials 20 and 21 facing each other.
As shown in FIGS. 3 and 4, openings 91 and 92 are provided in the portions corresponding to the through holes of the wall materials 20 and 21. That is, the inner side wall material 20 is provided with the test room side opening 91, and the outer wall material 21 is provided with the outer wall side opening 92.

Then, a through hole forming member 50 is installed in the space between the wall materials 20 and 21 facing each other, and the through hole 46 in the pipe portion 53 of the through hole forming member 50 is formed between the opening 91 on the test chamber side and the outer shell side. The opening 92 is communicated.
That is, the wall surface facing region 28 of the housing side inner flange portion 55 is in contact with the inner wall surface member 20, and the inner wall surface member 51 is interposed in the wall surface facing region 28 and the inner wall surface material 20 in a compressed state.
In particular, in the inner seal member 51, the main seal portion 75 is compressed and strongly pressed against the inner side wall member 20, and the plate-shaped auxiliary seal portion 77 is in a state of being lightly in contact with the inner side wall member 20.
Further, the outer wall material 21 is in contact with the wall surface facing region 98 of the outer shell side inner flange portion 56, and the outer sealing member 52 is interposed between the wall surface facing region 98 and the outer wall material 21 in a compressed state.
In particular, in the outer seal member 52, the main seal portion 86 is compressed and strongly pressed against the outer wall material 21, and the plate-shaped auxiliary seal portion 87 is in a state of being lightly in contact with the outer wall material 21.

Further, in the present embodiment, the protruding wall 58 surrounds the opening 57 of the inner flange portion 55 on the housing side in an annular shape, and the protruding wall 58 is inserted into the opening 91 of the wall material 20 as shown in FIG. ..

In the present embodiment, the through hole forming member 50 is installed between the wall materials 20 and 21, so that the through hole portion 5 is formed in the heat insulating wall 6, and the shaft 3 of the blower 2 has a through hole as shown in FIG. It is inserted into the part 5.
Inside the through-hole forming member 50, there is a packing insertion portion, and a packing material 45 such as a felt-shaped, mat-shaped, or blanket-shaped packing material 45 is pushed in to cover the periphery of the shaft 3. The outer shell side opening 92 has a plate-shaped packing retainer 43 to prevent the packing material 45 from popping out.

In the present embodiment, the through hole forming member 50 is fixed to the wall materials 20 and 21 facing each other by screws 96 and 97 which are temporary fastening elements.
That is, the inner side wall material 20 is provided with three screw insertion holes 93 around the opening 91 on the test chamber side, the screw 96 is inserted into the screw insertion hole 93 from the test chamber side, and the screw 96 is inserted into the internal flange portion on the housing side. The internal flange portion 55 on the housing side is fixed to the inner side wall member 20 by engaging with the female screw hole 61 of 55. A sealing material is applied to the screw 96.
Further, the outer wall material 21 is also provided with three screw insertion holes 95 around the outer shell side opening 92, the screw 97 is inserted into the screw insertion hole 95 from the outside of the outer shell, and the screw 97 is inserted into the outer shell side inner flange portion 56. The inner flange portion 56 on the outer shell side is fixed to the outer wall material 21 by engaging with the female screw hole 67 of the above. No sealant is applied to the screws 97.

When the inner flange portion 55 on the housing side is fixed to the wall material space 22 side of the inner side wall material 20, the main seal portion 75 of the inner seal member 51 is in contact with the wall material space 22 side of the inner side wall material 20. , It is in a state where it is slightly pressed and the height is lowered.
Further, the auxiliary seal portion 77 of the inner seal member 51 is also in contact with the wall material space 22 side of the inner side wall member 20.

The relationship between the outer shell side inner flange portion 56 and the outer wall material 21 is also the same, and when the outer shell side inner flange portion 56 is fixed to the wall material space 22 side of the outer wall material 21, the outer seal member 52 The main seal portion 86 is in contact with the wall material space 22 side of the outer wall material 21, and is slightly pressed to lower the height.
Further, the auxiliary seal portion 87 of the outer seal member 52 is also in contact with the wall material space 22 side of the outer wall material 21.

Here, the inner seal member 51 and the outer seal member 52 both surround the open end of the pipe portion 53 in an annular shape, and at least the main seal portions 75 and 86 are between the inner flange portions 55 and 56 and the wall materials 20 and 21. Since it is interposed in a compressed state, the space between the pipe portion 53 and the wall material 22 is completely sealed, and the space between the internal flange portions 55 and 56 and the wall material 22 is insulated. The flow of gas and liquid is prevented.
Therefore, airtightness is ensured between the pipe portion 53 and the space 22 between the wall materials.

Focusing on the vicinity of the inner flange portion 55 on the housing side, a screw insertion hole 93 for fixing the inner flange portion 55 on the housing side to the inner side wall member 20 is formed in the inner side wall member 20.
However, since the screw 96 is coated with the sealing material, the screw insertion hole 93 is substantially closed by the sealing material, and the air in the housing 7 is prevented from entering the space between the wall materials 22.
Further, in the present embodiment, since the female screw hole 61 on the housing side internal flange portion 55 side is non-penetrating, even if the air in the test chamber enters the housing side internal flange portion 55 through the groove of the screw, the wall material There is no way out to the space 22 side, and it is not possible to enter the space 22 between wall materials.

On the other hand, in the outer flange portion 56, the shaft portion 110 of the screw 97 passes through the through hole 88 formed in the selvage portion 80 of the auxiliary seal portion 87b of the outer seal member 52 and engages with the outer side inner flange portion 56. It fits. Here, since the through hole 88 is opened in the region surrounded by the main seal portion 86 of the outer seal member 52, the screw insertion hole 95 is the main seal portion of the outer seal member 52 in the space between the wall materials 22. It opens in the area surrounded by 86. Therefore, the periphery of the screw insertion hole 95 is sealed by the main seal portion 86.
Further, since the female screw hole 67 on the outer shell side inner flange portion 56 side is non-penetrating, even if the air outside the housing 7 enters the outer shell side inner flange portion 56 through the groove of the screw, the space between the wall materials 22 There is no way out, and it is not possible to invade the space between wall materials 22.

Next, the behavior of the seal members 51 and 52 when the through hole forming member 50 is fixed between the wall members 20 and 21 facing each other will be described.
Focusing on the inner seal member 51, the seal member 51 is attached to the seal arrangement portion 60 of the housing side inner flange portion 55 as described above.

Looking at the natural state in which no external force is applied to the seal member 51, in the wall surface facing region 28 of the inner flange portion 55 on the housing side, the main seal portion 75 of the seal member 51 is the innermost as shown in FIG. 8A. It is a position that protrudes toward the wall material 20 side.
That is, the inner flange portion 55 on the housing side has a protruding wall 58 that surrounds the periphery of the opening 57, but the protruding wall 58 enters the opening 91 of the wall material 20 as shown in FIG. 2, and therefore faces the wall material 20. do not do.
In the housing-side internal flange portion 55, the area facing the wall material 20 is limited to the outer region of the protruding wall 58.

Here, when the dimensional relationship between the seal arrangement portion 60 and the seal member 51 is confirmed, the thickness A of the auxiliary seal portion 77 is thinner than the thickness B of the main seal portion 75.
Further, the auxiliary seal portion 77 projects laterally from the position of the intermediate height of the main seal portion 75, and when placed in the horizontal posture, the position of the maximum height of the main seal portion 75 is the position of the auxiliary seal portion 77. Higher than the highest height position.
Further, the thickness B of the main seal portion 75 is larger than the depth C of the concave groove of the seal arrangement portion 60 described above. Therefore, a part of the main seal portion 75 protrudes from the concave groove of the seal arrangement portion 60, and in the wall surface facing region 28, as shown in FIG. 8A, the main seal portion 75 of the seal member 51 protrudes most. Become.
Further, since the height D from the floor surface to the upper surface of the auxiliary seal portion 77 when the inner seal member 51 is placed on the horizontal floor is larger than the depth C of the concave groove of the seal arrangement portion 60, the wall surface facing region 28 The portion protruding next to the main seal portion 75 is the auxiliary seal portion 77 of the inner seal member 51.

In this state, when the internal flange portion 55 on the housing side is pulled toward the inner side wall member 20 side by the screw 96 described above, the tip of the main seal portion 75 is on the wall material space 22 side of the wall material 20 as shown in FIG. 8B. In contact with. After that, since the main seal portion 75 is compressed, the torque required to rotate the screw 96 is slightly increased.
When the screw 96 is further tightened, the wall material 20 comes into contact with the auxiliary seal portion 77 of the seal member 51 as shown in FIG. 8C, and the torque required to rotate the screw 96 increases extremely.
Therefore, the assembling worker feels that the screw 96 has been sufficiently tightened, and stops further screw tightening.
At this time, the inner seal member 51 is in a state where a margin is left in elasticity, and is not in a completely crushed state, but has elasticity enough to ensure airtightness.

Although the behavior of the inner seal member 51 has been described, the same behavior can be expected for the outer seal member 52.
That is, when looking at the natural state in which no external force is applied to the outer seal member 52, the main seal portion 86 of the outer seal member 52 is at the most protruding position in the wall surface facing region 98 of the outer flange portion 56. Next to the main seal portion 86, the portion protruding in the wall surface facing region 98 is the auxiliary seal portion 87 of the outer seal member 52.

Therefore, when the inner flange portion 56 on the outer shell side is pulled toward the outer wall material 21 side by the screw 97, the tip of the main seal portion 86 first contacts the wall material 21, then the auxiliary seal portion 87 of the seal member 52, and the screw 97 is screwed. The torque required to rotate is extremely increased.
Therefore, the assembling worker feels that the screw 97 has been sufficiently tightened, and stops further screw tightening.
At this time, the outer seal member 52 is in a state where a margin of elasticity is left, and is not in a crushed state but has elasticity enough to ensure airtightness.

When the housing side inner flange portion 55 is attached to the inner side wall material 20, the protruding wall 58 formed in advance on the housing side inner flange portion 55 is engaged with the opening 91 of the wall material 20 to guide the protruding wall 58. As a result, it is desirable to attach the screw 96. By adopting this measure, the positioning work and the centering work of the through hole forming member 50 are reduced.

Further, the tightening pressure of the main seal portions 75 and 86 can be arbitrarily changed by changing the material type and hardness of the seal members 51 and 52 and changing the thickness of the auxiliary seal portions 77 and 87.

The through hole forming member 50 adopted in the above-described embodiment is provided with flange portions 55 and 56 at both ends of the pipe portion 53, and the structures of the two flange portions 55 and 56 are different.
However, the present invention is not limited to this configuration, and flange portions having the same shape and structure may be provided at both ends of the pipe portion 53.
For example, flange portions having a structure such as the housing-side internal flange portion 55 having a circular front view and having female screw holes 61 provided on the outside of the seal arrangement portion 60 may be provided at both ends of the pipe portion 53.
On the contrary, like the outer flange portion 56 on the outer shell side, the structure has a plurality of ear portions 66, and the female screw hole 67 opens in the region surrounded by the main seal portion 86 of the outer seal member 52. May be provided at both ends of the pipe portion 53.

Further, the shape of the flange portions provided at both ends of the pipe portion 53 may be opposite to that of the above-described embodiment. That is, a flange portion having a structure in which the front view is circular like the housing-side internal flange portion 55 and the female screw hole 61 is provided on the outside of the seal arrangement portion 60 is installed on the outer wall material 21 side, and the inside of the outer shell side. A flange portion having a plurality of ear portions 66 such as the flange portion 56 may be installed on the inner side wall member 20 side.

The recommended configuration is such that the female screw hole of the flange portion opens in the region surrounded by the main seal portion of the sealing member, and a structure such as the above-mentioned outer shell side inner flange portion 56 is desirable. In addition, a flange portion 115 having a form as shown in FIG. 9 can also be considered.
In the through hole forming member 111 shown in FIG. 9, there is a groove-shaped seal arrangement portion 112 near the outer periphery of the flange portion 115, and a female screw hole 113 is provided inside the concave groove-shaped seal arrangement portion 112.

In the embodiment described above, the through hole forming member 50 has flange portions 55 and 56 at both ends of the pipe portion 53, and the two flange portions 55 and 56 are both on the wall material space 22 side of the wall materials 20 and 21. Although it is provided at a position facing the wall, one of them may be provided on the outside of the wall materials 20 and 21.
Further, both flange portions may be provided on the outside of the wall materials 20 and 21.
Further, the flange portions 55 and 56 may be provided only on one of the pipe portions 53.
The through hole forming member 50 may be divided into a plurality of members.

When adopting a configuration in which both flange portions are arranged outside the wall members 20 and 21, it is desirable to divide the through hole forming member 50 into a plurality of members as described above.
For example, as shown in FIG. 10A, a through hole forming member piece 103 in which a flange portion 100 and a part of a pipe portion 101 are integrated and a female screw 102 is formed at an end portion, a flange portion 105, and a pipe portion. A through hole forming member piece 106 in which a part of 107 is integrated and a male screw 108 is formed at an end thereof may be individually formed, and the female screw 102 and the male screw 108 may be engaged with each other in the space between wall materials 22.
When the flange portions 100 and 105 are arranged outside the wall materials 20 and 21, the seal arrangement portion 60 is provided on the pipe portions 101 and 107 sides.

Further, as shown in FIG. 10B, a through hole forming member piece 113 in which the flange portion 110 and a part of the pipe portion 111 are integrated and a male screw 112 is formed at the end portion is separately prepared, and the through hole forming member is prepared separately. The wall material 20 (or 21) may be sandwiched between the flange portion 110 of the piece 113 and the flange portion 55 of the through hole forming member 50 shown in FIGS. 2 to 5. In FIG. 10B, a screw 117 is formed on the outer periphery of the pipe portion 111 of the through hole forming member piece 113 and is engaged with the screw 116 formed on the inner surface of the through hole forming member 50, but the wall material 20 (or The flange portion 110 and the flange portion 55 may be directly fastened with a screw penetrating the 21).

In the embodiment described above, the female screw holes 61 and 67 are provided in the flange portions 55 and 56, but a male screw may be erected in the portion and a nut provided outside the wall materials 20 and 21 may be engaged. ..
The fastening element to which the through hole forming member 50 is attached is not limited to a screw, and may be a stud, a clip, or the like.

In the embodiment described above, the height D from the floor surface when the inner seal member 51 is placed on the horizontal floor to the upper surface 100 of the auxiliary seal portion 77 is larger than the depth C of the concave groove of the seal arrangement portion 60. Although it is made larger, both may be the same.
Similarly, the height M from the floor surface to the upper surface 103 of the auxiliary seal portion 87 when the outer seal member 52 is placed on the horizontal floor is the same as the height K of the protruding wall 78 of the outer flange portion 56 on the outer shell side. There may be.

In the embodiment described above, the axial blower is shown as the blower 2, but it may be a centrifugal blower.
Further, the through hole portion 5 is not limited to the one through which the shaft 3 of the blower 2 is inserted, and may be used as a through hole for supplying power to an object to be tested in the test chamber 8 or taking out a sensor signal, for example. ..

Further, the structure of the through hole portion 5 is not limited to the one provided in the heat insulating wall 6 of the environmental test apparatus 1, and is also applied to the through hole formed in an apparatus for creating a low temperature environment or a high temperature environment such as a heat treatment apparatus or a freezer. can do.

In the embodiment described above, the cross-sectional shape of the pipe portion 53 of the through-hole forming member 50, that is, the cross-sectional shape of the through-hole is circular, but the cross-sectional shape of the through-hole is arbitrary, and is elliptical or polygonal. May be good. Further, the cross-sectional shape of the through hole may be an asymmetrical irregular shape.
The front shape of the seal member is not limited to that exemplified as the embodiment. The front shape of the seal member need only be able to surround the opening 57 of the pipe portion 53 of the through hole forming member 50, and does not have to be similar to the shape of the opening 57.
For example, the shape of the opening 57 may be circular, and the front shape of the seal member may be oval or have an ear portion.

In the embodiment described above, all the screws 96 for fixing the inner flange portion 55 on the housing side are outside the region surrounded by the inner sealing member 51, and all the screws 97 for fixing the inner flange portion 56 on the outer shell side are all. Although it is in the area surrounded by the seal member 52, the screw in the area of the seal member and the screw on the outside may be mixed with respect to one flange portion.

1 Environmental test equipment (environment formation equipment)
2 Blower 3 Shaft 5 Through hole 6 Insulation wall 7 Housing 8 Test room 20 Wall material (inner side wall material)
21 Wall material (outer wall material)
22 Space between wall materials 38 Foundation circle (foundation contour)
41 Drive motor 50 Through hole forming member 51 Seal member (inner seal member)
52 Seal member (outer seal member)
53 Pipe 55 Flange (Internal flange on the housing side)
56 Flange part (inner flange part on the outer shell side)
58 Protruding wall 61 Female screw hole 66 Ear part (overhanging part)
60, 72 Seal arrangement part 73 Line part 75, 86 Main seal part 77, 87 Auxiliary seal part 78 Protruding wall 80 Ear part (overhanging part)
81 Foundation circle (basic contour)
88 Through hole 100, 105 Flange part 103, 106, 113 Through hole forming member piece 101, 107, 111 Pipe part

Claims (8)

It has a housing having a heat insulating wall at least partially, and the heat insulating wall has a structure in which a heat insulating material is provided in a space between wall materials formed between facing wall materials, and penetrates the heat insulating wall. In an environment forming device having a through hole portion
The through-hole portion has a through-hole forming member and a seal member interposed between the wall material and the through-hole forming member.
The through hole forming member has a pipe portion forming an inner wall of the through hole portion and a flange portion having a wall surface facing region facing at least one of the wall materials, and a seal arrangement portion is provided in the wall surface facing region. Provided,
The seal member has a line portion that surrounds the open end of the pipe portion, and the line portion includes a main seal portion and an auxiliary seal portion that projects outward and / or inward side with respect to the main seal portion. The auxiliary seal portion is thinner than the main seal portion.
The seal member is installed in the seal arrangement portion and is installed.
In a state where no external force is applied to the seal member, whether the main seal portion protrudes from any part of the wall surface facing region and the auxiliary seal portion has the same protruding position as a part of the wall surface facing region. Alternatively, it protrudes from any part of the wall surface facing region and
An environment forming device characterized in that the through hole forming member is installed on the wall material at least in a state where the main seal portion is pressed against the wall material. The environment forming apparatus according to claim 1, wherein the main seal portion has a substantially circular cross-sectional shape, and the auxiliary seal has a flat cross-sectional shape. The environment forming apparatus according to claim 1 or 2, wherein the auxiliary seal portion is in contact with the wall material. The environment formation according to any one of claims 1 to 3, wherein the flange portion is fixed to the wall material by a fastening element having a shaft portion, and the line portion surrounds the outside of the shaft portion. apparatus. The contour shape when the seal member is viewed from the front has a basic contour portion located at the opening end of the pipe portion when mounted on the flange portion, and an overhanging portion protruding outward from the basic contour portion. The environment forming apparatus according to claim 4, wherein at least a part of the fastening elements is arranged on the overhanging portion. The flange portion has a threaded portion on which a female screw or a male screw is formed, the threaded portion does not penetrate the flange portion, and the flange portion is fixed to the wall material via a separately prepared screw or nut. The environment forming apparatus according to any one of claims 1 to 5, characterized in that. Claims 1 to 1, wherein the flange portion communicates with the pipe portion and has a protruding portion protruding from the wall surface facing region, and the protruding portion is engaged with an opening of the wall portion. The environment forming apparatus according to any one of 6. It is a through-hole structure attached to a through-hole formed in a heat insulating wall having facing wall materials.
The through-hole structure has a seal member interposed between the through-hole forming member, the wall material, and the through-hole forming member.
The through hole forming member has a pipe portion forming an inner wall of the through hole portion and a flange portion having a wall surface facing region facing at least one of the wall materials, and a seal arrangement portion is provided in the wall surface facing region. Provided,
The seal member has a line portion that surrounds the open end of the pipe portion, and the line portion includes a main seal portion and an auxiliary seal portion that projects outward and / or inward side with respect to the main seal portion. The auxiliary seal portion is thinner than the main seal portion.
The seal member is installed in the seal arrangement portion and is installed.
In a state where no external force is applied to the seal member, whether the main seal portion protrudes from any part of the wall surface facing region and the auxiliary seal portion has the same protruding position as a part of the wall surface facing region. Alternatively, it protrudes from any part of the wall surface facing region and
A through-hole structure, wherein the through-hole forming member is installed on the wall material with at least the main seal portion being pressed against the wall material.

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