JP2013072648A - Environmental test device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an environmental test device including such a configuration that work efficiency in gasket exchange is improved further.SOLUTION: For the environment test device, a proximity member 6 and a sealing member 7 are disposed between a test chamber and an opening/closing door, the opening/closing door is closed, and the sealing member 7 is closely attached to the opening/closing door to secure airtightness inside the test chamber. The sealing member 7 includes a seal part 8 to be actually and closely attached to the opening/closing door, and an attachment association part 9 mounted on the proximity member 6. The sealing member 7 includes two overhang parts 13 and 14, and a bent part 18 provided on one overhang part 13. The proximity member 6 is a frame-like member and has an inner side recess 22 to which the sealing member 7 is to be attached on an inner edge. The sealing member 7 is fixed in the state of a holding posture by disposing the inner side recess 22 between the two overhang parts 13 and 14 and engaging the bent part 18 with the inner side recess 22.

Description

  The present invention relates to an environmental test apparatus that can be adjusted to a target temperature and humidity within a predetermined test chamber, and in particular, a seal structure between an apparatus main body and an opening / closing body attached to the apparatus main body so as to be freely opened and closed. About.

  There is an environmental testing device as a device for testing the performance and durability of products and materials. This type of environmental test apparatus includes a test chamber on which a specimen to be tested is placed, and adjusts the temperature and humidity in the test chamber to a desired test environment.

  By the way, the contents of the environmental test vary depending on the sample body, and the sample body may be exposed to a low temperature environment or a high temperature environment. In addition, not only the temperature environment but also the humidity environment may be changed at the same time. Therefore, during the environmental test, there is a significant difference in temperature and humidity between the test chamber and the external environment. That is, if the test chamber, which is a limited space, is affected by the external environment during the environmental test, the desired test environment adjusted at the corner may be disturbed, and the reliability of the test may be greatly reduced. Therefore, the environmental test apparatus is configured to maintain high airtightness in the test chamber.

  Here, in a normal environmental test apparatus, an opening communicating with the outside is provided in an apparatus main body provided with a test chamber, and a sample body is taken in and out through the opening. And the environmental test apparatus is set as the structure which can close the opening with the opening / closing door attached so that opening and closing was possible with respect to the apparatus main body. That is, in the environmental test apparatus, in order to ensure sufficient airtightness in the test chamber, the sealing performance between the apparatus main body and the open / close door is important.

  Therefore, conventionally, a seal structure has been adopted in which a gasket formed in a long shape is bonded and fixed between a device main body and an open / close door with a sealant to ensure a sealing property in a test chamber. More specifically, a gasket is attached along the opening edge of the apparatus main body to form a seal structure. Thereby, when the open / close door is closed, the gasket is in close contact with the open / close door, and the gap between the apparatus main body and the open / close door is sealed, so that high airtightness in the test chamber is ensured.

However, when the gasket is used continuously over a long period of time, there is a problem that sufficient sealing performance cannot be maintained due to deterioration of quality over time or deterioration of durability.
For this reason, when the quality deterioration or durability of the gasket becomes serious, the problem is solved by replacing the gasket with a new one. However, it is difficult to remove the gasket bonded with the sealant from the main body of the apparatus, and the replacement work takes time and effort.

  Therefore, Patent Document 1 discloses a technology of a seal structure that enables a gasket to be fixed at a predetermined position without bonding with a sealant or the like. Specifically, in the seal structure of Patent Document 1, the gasket is attached so as to sandwich the end portion of the frame provided in the apparatus main body, and the gasket is prevented from moving in the dropping direction so that the gasket does not fall off the frame. It is set as the structure which has arrange | positioned the interior board in the position to do. Thereby, the work efficiency at the time of gasket exchange improves dramatically compared with the case where it adheres using a sealant.

JP-A-10-288451

  However, in Patent Document 1, since the interior plate is arranged at a position that prevents the gasket from moving in the drop-off direction, when the gasket is attached, the gasket itself is not pushed in with a plate-like member such as a spatula. Further improvement has been desired from the viewpoint of work efficiency when exchanging gaskets.

  Therefore, in view of the problems of the prior art, an object of the present invention is to provide an environmental test apparatus having a configuration that can further improve the working efficiency at the time of gasket replacement.

  In order to solve the above problems, the invention described in claim 1 is to open and close a test chamber in which a desired temperature and / or humidity environment is formed and an opening communicating the test chamber and the outside to the outside. In an environmental test apparatus having an openable / closable body, it has a sealing member that contributes to maintaining airtightness in the test chamber, and the sealing member is close to the test chamber side and the open / close body side when the open / close body is closed. The sealing member has a piece-like seal portion and an attachment-related portion connected to one end of the seal portion and related to attachment to the proximity portion. The related part is formed by an extension part extending from one end of the seal part and two or more extension parts that intersect the extension part and project in the same direction. Bent in the direction intersecting the overhang direction of the overhang The adjacent portion has a sandwiched portion, and the sandwiched portion is disposed between the adjacent overhang portions, and at least the overhang portion having the bend portion and the overhang portion. An engagement groove is formed in the sandwiched portion disposed between another adjacent overhanging portion, and the sealing member pushes the space between the adjacent overhanging portions into the sandwiched portion. It is an environmental test apparatus characterized by taking a holding posture by setting a sandwiched portion to a fitted state and further engaging a bent portion with an engagement groove.

  The environmental test apparatus of the present invention includes a sealing member (corresponding to a gasket) and a characteristic configuration in the proximity portion in order to improve work efficiency when replacing the gasket. Specifically, the sealing member includes an attachment-related portion, and the attachment-related portion has two or more overhang portions, one of which is bent in a direction intersecting with the overhang direction of the overhang portion. A bent portion is provided, the proximity portion includes a sandwiched portion, and an engagement groove is provided in the sandwiched portion. Then, the sealing member pushes between the adjacent projecting portions into the sandwiched portion, puts the sandwiched portion into a fitted state, and further engages the bent portion of the projecting portion with the engagement groove of the sandwiched portion. As a result, the sealing member is held and fixed to the proximity portion. That is, by taking the holding posture, the sealing member is in a state where movement in the direction to be pushed into the sandwiched portion and the extraction direction opposite to that direction is restricted while maintaining the sandwiched portion. In other words, even if the sealing member is not restricted in movement by another member (such as the interior plate described above), the fitting state with the sandwiched portion is maintained by the action of the bent portion. As a result, the proximity portion to which the sealing member is attached and the surrounding structure are simplified, so that the operation of pushing the sealing member to a predetermined position using a spatula or the like as in the prior art is omitted. Therefore, according to the present invention, since the sealing member can be fixed at a predetermined position simply by manual attachment, the attachment can be easily performed without trouble. As a result, it is possible to provide an environmental test apparatus with high work efficiency when replacing the sealing member.

Here, in general, when a long sealing member is attached so as to draw a substantially square shape, the seal part rises at the corner that forms the square (from the side of the sealing member mounting side when the opening / closing body is closed) There is a feature that a state of projecting to the facing test chamber side or the open / close door side is more conspicuous than other portions (straight line portions). Therefore, the square corners of the sealing member are more susceptible to deterioration in quality and durability over time than in other locations. Therefore, in order to avoid such a problem, for example, instead of using a series of long objects, it may be possible to employ a configuration in which the sealing member is abutted at the corner, but in this case, the seal at the corner is used. Sex cannot be secured. That is, when the sealing members are butted together at the corners, the seal part when the opening and closing body is closed is deformed in the inside and outside of the opening, so a gap is formed at the joint where the sealing members are butted together, and the entire sealing member There was a concern that the continuity of the test room could not be maintained, and the airtightness in the test room could not be expected.
In view of such circumstances, when using a long sealing member and mounting the sealing member so as to draw a square, take measures to prevent the sealing member from abutting at the corners of the square. However, it can be said that it is suitable from the viewpoint of ensuring the sealing performance of the sealing member.

  Therefore, in order to solve such a problem, the invention according to claim 2 is such that the seal portion is a curved shape bent outward from the opening on the basis of the holding posture of the sealing member, and the overhang portion is The overhanging portion that is arranged inside the curve of the seal portion and has a bent portion is located in the vicinity of the proximal end side of the seal portion, and the bent portion bends in a direction opposite to the direction in which the seal portion is located. It is set as the environmental test apparatus of Claim 1 characterized by the above-mentioned.

  According to such a configuration, since the seal part is a curved shape bent outwardly of the opening communicating with the inside and outside of the test chamber based on the holding posture of the sealing member, normally, when the opening / closing body is closed, the seal part is: The outside of the curve contacts the opening / closing body side or the test chamber side. The sealing member is pressed inward in the direction of the curve of the seal portion, so that the curved portion is substantially planar, and is in surface contact when the opening / closing body is completely closed. Thereby, even if the seal member is deformed to some extent, any portion in surface contact is kept in contact and the sealing performance is maintained, so that the sealing performance can be prevented from being reduced due to the deformation.

  Here, as described above, when the sealing member is attached in a square shape, the rise of the seal portion at the corner portion (deformation inward of the opening communicating with the inside and outside of the test chamber based on the base end side of the seal portion) occurs. Stand out. This is because, in the corner portion, as shown in FIGS. 11 and 12, when the sealing member is bent, a tensile force that pulls left and right in the longitudinal direction is generated, and the tensile force acts to flatten the seal portion. is there. For example, as shown in FIGS. 12 and 13, the conventional sealing member 107 has a substantially flat shape as a whole by the action of a tensile force. Further, when a change with time (deterioration of quality and deterioration of durability) is further added to the portion where the rise of the seal portion is conspicuous, the shape of the entire sealing member becomes considerably distorted, and the initial seal portion 108 It becomes difficult to maintain the shape, and it becomes difficult to ensure sufficient sealing performance.

Therefore, in the present invention, the bending portion resists the tensile force that acts to flatten the seal portion. That is, according to the present invention, on the proximal end side of the seal portion, the bent portion is engaged with the engagement groove, and the bent portion is pulled toward the extension portion side, whereby the distal end side is curved with respect to the seal portion. This is a configuration in which a force that is attracted in the inner direction (force that rotates in the inner direction of the curve with respect to the base end side of the seal portion) is applied. And the force which rotates in the direction which the front-end | tip of this curve faces is a direction opposite to the direction of the force which raises a seal | sticker part. As a result, the turning force cancels or reduces the force that raises the seal portion, so that deformation of the seal portion can be suppressed. For this reason, in the present invention, the rise of the seal portion is significantly reduced as compared with the prior art.
Therefore, in the present invention, even if there is a condition that the seal part of the sealing member can rise due to a tensile force (for example, a corner part when attached to a square shape), the deformation is arranged in the vicinity of the base end of the seal part. Since it can suppress by the force which acts on a bending part, the malfunction which a seal | sticker part stands | starts up unlike the past cannot occur. As a result, according to the present invention, it is possible to prevent the sealing performance from acceleratingly decreasing due to deterioration in quality and durability over time.

  The invention according to claim 3 is the environmental test apparatus according to claim 1 or 2, characterized in that the bent portion has a protrusion protruding in a direction close to the extension portion on the side facing the extension portion. .

  According to such a configuration, the action of pulling the bent part toward the extension part can be further increased, and accordingly, the force against the rising acting on the seal part is increased. That is, according to the present invention, it is possible to further reduce the rise of the seal portion.

  The invention according to claim 4 is the environmental test apparatus according to any one of claims 1 to 3, wherein the projecting portion having the bent portion has a cross-sectional area that decreases toward the tip. .

Generally, force stress in a member is concentrated on a portion that supports the action of external force. In other words, the support portion of such an external force needs to be stronger than the other portions.
Therefore, in the environmental test apparatus of the present invention, the stress of the force of the overhang portion when the moment of the force rotating inside the opening is applied to the seal portion is concentrated on the base end side. The strength of the side was intensively increased. Thereby, it is possible to provide a reasonable sealing member with no waste in strength.

  In the invention according to claim 5, one of the pair of overhanging portions that brings the sandwiched portion into a fitted state has a protruding portion that protrudes in a direction facing the bent portion, and the sandwiched portion is: 5. The environmental test apparatus according to claim 1, further comprising a protrusion engaging groove with which the protrusion engages.

  According to this configuration, since the sealing member can be prevented from coming off by both the bent portion and the protruding portion, the possibility of falling off can be further reduced.

  The environmental test apparatus according to the present invention has a configuration in which a bent portion is provided in an overhang portion of a sealing member to which an engaged portion is fitted, and a holding posture is obtained by engaging with an engaging groove of the engaged portion. Therefore, since the sealing member can be fixed at a predetermined position simply by manual attachment, the attachment can be easily performed without trouble. Thereby, the work efficiency at the time of replacement | exchange of a sealing member can be improved reliably. Moreover, since the bending part was provided in the overhang | projection part located in the base end vicinity of a seal part, the excessive standing | starting-up of a seal part can be suppressed. As a result, it is possible to prevent an accelerating decrease in sealing performance due to a deterioration in quality over time or a decrease in durability.

It is a perspective view which shows the environmental test apparatus which concerns on embodiment of this invention. It is a perspective view which shows the state which opened the opening / closing door of the environmental test apparatus of FIG. It is AA sectional drawing which shows the seal structure of the environmental test apparatus of FIG. It is a perspective view which shows a proximity member. It is DD sectional drawing which shows the proximity member of FIG. It is a perspective view which shows a part of sealing member. It is FF sectional drawing which shows the sealing member of FIG. It is a BB direction sectional view showing the environmental testing device of FIG. It is explanatory drawing which shows the sealing member at the time of opening and closing a door, and a proximity member, (a) is sectional drawing of a linear part, (b) is sectional drawing (GG sectional drawing of FIG. 11) of a corner | angular part. It is sectional drawing which shows the relationship between the close_contact | adherence member at the time of opening-and-closing door closing, and a proximity member. FIG. 3 is an enlarged perspective view conceptually showing a part C of the environmental test apparatus of FIG. 2. (The arrow indicates the tensile force of the member generated when the sealing member is bent) It is an expansion perspective view which shows the conventional sealing member notionally, and is an enlarged view of the part located in the corner | angular part of a proximity member. (The arrow indicates the tensile force of the member generated when the sealing member is bent) It is HH sectional drawing which shows the relationship between the close_contact | adherence member of FIG. 12, and a proximity | contact member.

Below, the environmental test apparatus 1 which concerns on embodiment of this invention is demonstrated.
As shown in FIGS. 1 and 2, the environmental test apparatus 1 of the present embodiment includes an apparatus main body 2 having a test chamber 5 and an opening / closing door 3, and in order to ensure airtightness in the test chamber 5, A characteristic seal structure is provided between them. More specifically, as shown in FIG. 3, the seal structure of the environmental test apparatus 1 includes an outer seal portion 45 attached to the open / close door 3 side, an inner seal portion 46 attached to the device main body 2 side, Although formed by the heat insulation space 47 between them, the characteristic configuration of the present embodiment is applied to the inner seal portion 46 on the apparatus main body 2 side.
Moreover, although the environmental test apparatus 1 of this embodiment is equipped with the apparatus (humidification heater, freezing circuit, heating apparatus, air blower, etc.) which contributes to temperature and humidity adjustment like well-known things, it is not related to this invention in particular. Therefore, in the following description, explanations regarding them will be omitted, and description will be made by paying attention to the characteristic configuration.

  The apparatus main body 2 has an outer frame formed by the outer member 20, and the test chamber 5 is accommodated therein. More specifically, the apparatus main body 2 includes a heat insulating member (not shown) arranged inside the outer member 20 to form a heat insulating structure, and an interior wall 15 that forms the test chamber 5 is further inside the heat insulating member. It is arranged. That is, the apparatus main body 2 is configured not to be affected by external temperature changes in the test chamber 5 by the above-described heat insulating structure. Further, the apparatus main body 2 is provided with a square-shaped opening 11 that communicates the inside and the outside of the test chamber 5 on the front side, and a sealing structure that is a characteristic configuration of the present embodiment along the opening 11. A proximity member 6 and a sealing member 7 are provided. The opening 11 is a portion surrounded by the interior wall 15 that forms the test chamber 5.

The proximity member 6 is made of resin and is a rectangular frame member as shown in FIG. As shown in FIG. 2, the proximity member 6 is disposed in front of the apparatus main body 2 and is a gap between the outer member 20 and the interior wall 15 and closes a portion where a heat insulating member (not shown) is located. So that it is fixed. That is, the proximity member 6 has an outer edge set to a size along the outer member 20, and an inner edge set to a size along the interior wall 15.
As shown in FIG. 8, the interior wall 15 and the outer member 20 have bent portions 30 and 31 that are bent on the front side of the apparatus main body 2, and the proximity member 6 is located at the bent portions 30 and 31. On the other hand, it is fixed using fastening means such as screws.

  Further, the proximity member 6 has a continuous stepped cross-sectional shape as shown in FIG. That is, the proximity member 6 is formed in the order of the inner concave portion 22, the intermediate convex portion 23, and the outer concave portion 24 from the opening 11 side to the outer side with reference to the state of being attached to the apparatus main body 2. Each of the concave portions 22 and 24 and the convex portion 23 is formed in a frame shape along the outer edge or inner edge of the proximity member 6 (or along the opening 11 of the apparatus main body 2). The inner concave portion 22 and the outer concave portion 24 are stepped portions that are recessed toward the back side of the apparatus main body 2, and the intermediate convex portion 23 is a stepped portion that protrudes toward the front side of the apparatus main body 2.

  Further, as shown in FIG. 5, a bent portion engaging groove 16 is provided in the front side plane 25 on the end side of the inner concave portion 22 (the edge end side of the opening 11), and a protrusion is formed on the back side plane 26. An engagement groove 17 is provided. The engaging grooves 16 and 17 are each formed in a frame shape along the outer edge or inner edge of the proximity member 6 (or along the opening 11 of the apparatus main body 2). The bent portion engaging groove 16 is positioned closer to the opening 11 than the protruding portion engaging groove 17.

The sealing member 7 is a so-called gasket, and is a long member having flexibility as shown in FIG. Specifically, as shown in FIG. 2, the sealing member 7 has a length that can surround the edge of the opening 11 of the apparatus body 2. As shown in FIG. 7, the sealing member 7 includes a piece-like seal portion 8 that contacts the opening / closing door 3 and extends in the longitudinal direction of the sealing member 7, and an attachment-related portion related to attachment to the proximity member 6. 9 and the cross-sectional shape thereof is formed in a substantially “F” shape.
In the following description, the cross section is used as a reference.

  The seal portion 8 is a curved portion formed in an arc shape having a central angle θ of approximately 60 to 80 degrees. More specifically, the arc of the seal portion 8 is a circle having a diameter of 15 to 20 mm, preferably 16 to 19 mm, more preferably 18 mm, and one end in the curve direction is on the side of the attachment-related portion 9 described later. The other end portion in the curve direction is a free end portion.

The seal portion 8 includes a rib 37 and a branch piece 36 that extend in the longitudinal direction of the sealing member 7.
The rib 37 enhances the strength of the free end, and is a portion that is located at the free end of the seal portion 8 and protrudes outward from the curved inner surface 38.
The branch piece 36 prevents turning-up due to a pressure change (especially a positive / negative change) in the test chamber 5, and is located at a substantially central portion in the circumferential direction of the seal portion 8 and is a portion protruding outward from the outer surface 35. is there. In other words, the branch piece 36 is a direction in which the protruding direction intersects the curved direction of the seal portion 8. More specifically, the protruding direction of the branch piece 36 is a direction rotated in a range of an angle M = more than 90 degrees to less than 180 degrees with respect to the direction in which the free end of the seal portion 8 faces.

  The attachment-related portion 9 includes an extension portion 12 that extends linearly from the fixed end portion of the seal portion 8, and two extension portions 13 and 14 that intersect the extension portion 12 and protrude in the same direction. It is a part which has. In other words, the attachment-related portion 9 is a portion in which the two overhang portions 13 and 14 are paired and a notch-shaped insertion portion 21 is provided between them. More specifically, the attachment-related portion 9 is configured so that the two overhang portions 13 and 14 are both located on the side toward which the curve of the seal portion 8 is directed, that is, on the side toward which the free end portion is directed. Hereinafter, the seal-side overhanging portion (13) is positioned at one end portion of the extension portion 12, that is, in the vicinity of the fixed end portion (base end) of the seal portion 8, and another overhanging portion (hereinafter referred to as a base portion overhang). 14 is also configured to be located at the other end of the extension 12. In the present embodiment, the overhang portions 13 and 14 overhang in a direction substantially orthogonal to the extension portion 12.

The cross-sectional area of the seal-side overhang portion 13 is gradually reduced from the end portion (base end portion) side of the extension portion 12 toward the tip in the overhang direction. That is, the seal side overhanging portion 13 has a configuration in which the rigidity on the support side is higher than the rigidity on the tip side.
The base overhanging portion 14 has a cross-sectional area that is substantially uniform in the overhanging direction, and includes an engagement protrusion 40 and a base side protrusion 41 that extend in the longitudinal direction of the sealing member 7.
The engagement protrusion 40 is formed on the surface of the base overhanging portion 14 facing the seal side overhanging portion 13 on the distal end side of the base overhanging portion 14. That is, the engagement protrusion 40 protrudes in a direction substantially orthogonal to the surface on which the seal-side protruding portion 13 exists. In other words, the engagement protrusion 40 is a protrusion protruding in the direction in which the seal portion 8 is located.
The base side protrusion 41 is formed on the surface of the base overhanging portion 14 on the side opposite to the surface on which the engagement protrusion 40 is disposed. That is, the base side protrusion 41 protrudes in a direction opposite to the side where the seal side protruding portion 13 exists and in a direction substantially orthogonal to the side. In other words, the base-side ridge portion 41 is a convex portion that protrudes in the direction opposite to the direction in which the seal portion 8 is located.

Furthermore, the attachment-related portion 9 has a bent portion 18 that intersects the protruding direction of the seal-side protruding portion 13. The bent portion 18 is located on the distal end side of the seal side overhanging portion 13, slightly inclined to the base end side of the seal side overhanging portion 13 with respect to the overhanging direction, and close to the base overhanging portion 14. It is a part bent in the direction. In other words, the bent portion 18 is a portion bent from the tip of the seal side overhang portion 13 in a direction away from the direction in which the seal portion 8 is located and in a direction close to the extension portion 12.
Further, the bent portion 18 has a bent portion side protrusion 27 extending in the longitudinal direction of the sealing member 7. The bent portion side ridge portion 27 is a convex portion protruding outward from the surface of the bent portion 18 facing the extension portion 12.

  The open / close door 3 is a known door having a heat insulating structure.

Next, the positional relationship between the proximity member 6 and the sealing member 7 in the environmental test apparatus 1 will be described.
In the environmental test apparatus 1 of the present embodiment, as shown in FIG. 2, a proximity member 6 is disposed on the front surface of the apparatus body 2, and a sealing member 7 is attached to the proximity member 6. Specifically, the proximity member 6 is fixed to the bent portion 30 located between the outer member 20 and the interior wall 15 with a screw or the like so as not to interfere with the opening 11 on the front side of the apparatus main body 2. ing. At this time, as shown in FIG. 8, a gap 32 is formed between the proximity member 6 and the apparatus main body 2. Specifically, the gap 32 is formed between the back surface side plane 26 in the inner recess 22 and the bent portion 30. Further, in the proximity member 6, the bent portion engaging groove 16 opens toward the front side, and the protruding portion engaging groove 17 opens toward the back side.

  On the other hand, the sealing member 7 is arranged such that the two projecting portions 13 and 14 sandwich the end side (the sandwiched portion) of the inner recess 22 of the proximity member 6. In other words, the end portion of the inner concave portion 22 is inserted into the insertion portion 21 formed by the pair of overhang portions 13 and 14. That is, the base overhanging portion 14 is arranged in a gap 32 formed by the back surface side plane 26 of the proximity member 6 and the bent portion 30 of the apparatus main body 2, and the seal side overhanging portion 13 is in front of the inner recess 22. It is arranged along the side plane 25. Specifically, as shown in FIG. 9A, the sealing member 7 has the engagement protrusion 40 of the base overhanging portion 14 fitted in the protrusion engaging groove 17, and the seal-side overhanging portion 13 at the distal end. The positioned bent portion 18 is fitted in the bent portion engaging groove 16. More specifically, in the state where the base overhanging portion 14 is inserted into the gap 32, the engaging protrusion 40 is fitted into the protrusion engaging groove 17, and the base side protruding portion 41 causes the inner recessed portion 22 side to be engaged. The seal-side overhanging portion 13 is disposed at a position facing the base overhanging portion 14 with the inner recess 22 interposed therebetween, and the bent portion 18 is opposed to the seal-side overhanging portion 13. The bent portion-side protrusion 27 is fitted in the bent portion engaging groove 16 in a substantially orthogonal posture and presses the inner direction of the opening 11 (left direction in FIG. 9).

Next, the operation of each part when the sealing member 7 is attached will be described.
In the present embodiment, basically, the sealing member 7 is fitted and attached to the end of the proximity member 6 fixed to the apparatus main body 2. In other words, the space between the protruding portions 13 and 14 of the sealing member 7 from the opening 11 side of the apparatus main body 2 is arranged at the end of the inner concave portion 22 of the proximity member 6, and then pushed into the inner concave portion 22. It is press-fitted between the parts 13 and 14. At this time, the base overhanging portion 14 promotes the gap 32 formed between the bent portion 30 and the inner concave portion 22, and when the engagement protrusion 40 is fitted into the protrusion engaging groove 17, The position is fixed. The seal-side overhanging portion 13 is propelled along the front side plane 25 of the proximity member 6 while the tip of the bent portion 18 is deformed in a direction intersecting the pushing direction, and the bent portion 18 is engaged with the bent portion. The position is fixed when the groove 16 is fitted. As a result, the sealing member 7 is attached to the proximity member 6 (holding posture).
When the open / close door 3 is closed with respect to the sealing member 7 in the holding posture, as shown in FIG. 10, the inner wall of the open / close door 3 and the front side flat surface 35 of the seal portion 8 are in surface contact with each other, The protrusion 36 is in point contact.

Next, a characteristic action in the sealing member 7 in the holding posture will be described.
As described above, in the environmental test apparatus, when the seal portion of the sealing member rises, there is a problem of reducing the airtightness in the test chamber. In particular, at the portion (corner portion) where the long sealing member is bent, the rising of the seal portion stands out more than the other portions from the beginning of attachment. Further, when a change with time (deterioration of quality and deterioration of durability) is further added to the portion where the rise of the seal portion is conspicuous, the shape of the entire sealing member becomes considerably distorted, and the sealing member 7 and the open / close door The contact state as described above with 3 cannot be maintained, and it becomes impossible to ensure sufficient sealing performance.

Therefore, in the present embodiment, a force that opposes the rising of the seal portion 8 is applied to the bent portion 18 in advance.
Here, attention is paid to the posture of the bent portion 18 before and after the sealing member 7 is attached.
Before the attachment to the proximity member 6, the bent portion 18 takes a posture in which the tip is slightly directed toward the extension portion 12 as shown in FIG. 7. On the other hand, the distal end of the bent portion 18 after being attached to the proximity member 6 is substantially perpendicular to the seal side protruding portion 13 as shown in FIG. That is, after the attachment of the proximity member 6, the bent portion 18 is disposed at a position that is moved in a direction slightly away from the extension portion 12 side from the initial position.

As a result, a force is generated in the bent portion 18 to return to the initial position (position before being attached to the proximity member 6). However, since the bent portion 18 is engaged with the bent portion engaging groove 16, the bent portion 18 itself cannot return to the initial position. Therefore, the force acts so as to attract the proximal end side of the seal portion 8 to the bent portion 18 side via the seal side overhang portion 13. That is, the bent portion 18 is arranged in the vicinity of the proximal end of the seal portion 8 and engaged with the bent portion engaging groove 16, thereby applying a force to the bent portion 18, and applying the force to the curve of the seal portion 8. Can be converted into a force that can maintain the pressure, that is, a force that suppresses the rising of the seal portion 8, so that the rising of the seal portion 8 (the base end of the seal portion 8 shown in FIG. The shortest (vertical) length from the part to the tip is α.).
Furthermore, in the present embodiment, since the bent portion-side ridge portion 27 is provided on the surface of the bent portion 18 on the extension portion 12 side, the force for returning the posture acting on the bent portion 18 can be further increased. . Therefore, in the present embodiment, the force acting on the seal portion 8 is also increased, and as a result, the rise of the seal portion 8 can be made smaller.

  In particular, due to this action, the rise of the seal portion 8 at the corner of the opening 11 is significantly reduced. That is, as shown in FIGS. 9B and 11, the tensile force generated by bending the sealing member 7 is reduced by the action of the bent portion 18, so that other portions (straight line portions) shown in FIG. ), The degree of rise can be reduced. Specifically, the shortest (vertical) length from the base end portion to the tip end of the seal portion 8 at this time is β, which is shorter than the conventional one. This is clear even when compared with the conventional sealing member 107 shown in FIGS.

  As described above, in the above-described embodiment, when the sealing member 7 is pushed into and attached to the proximity member 6, they are configured to engage with each other. Therefore, a force (a force in the extraction direction) opposite to a certain pushing direction is applied. Unless otherwise, the holding posture is maintained. Therefore, in this embodiment, unlike the prior art, there is no need to arrange other members having a function of preventing the dropout of the close member and maintaining the holding posture in the extraction direction, and a tool is used when attaching the sealing member. There is no need. Therefore, in this embodiment, since the operator can easily attach the sealing member 7 by hand, work efficiency when replacing the sealing member can be improved.

  In the above embodiment, the bent portion 18 slightly inclined toward the extension portion 12 is provided in the vicinity of the proximal end of the seal portion 8, and the bent portion 18 is engaged with the bent portion engaging groove 16 of the proximity member 6. Therefore, a force that opposes the rising can be applied to the seal portion 8 in advance. For this reason, even when the sealing member 7 is bent and attached, the rising of the seal portion 8 does not stand out as compared with other places.

In the said embodiment, although the structure which provided the bending part side protrusion 27 in the bending part 18 was shown, this invention is not limited to this. That is, a configuration in which the bent portion side ridge portion 27 is not provided may be employed.
Moreover, in the said embodiment, although the structure which inclined the bending part 18 to the extension part 12 side was shown slightly, this invention is not limited to this. In other words, the bent portion 18 may be substantially orthogonal to the seal-side protruding portion 13 and the posture of the bent portion 18 may be changed only by the bent portion-side ridge portion 27. In short, any configuration may be employed as long as the bending portion 18 is arranged in the bending portion engaging groove 16 and the bending portion 18 is subjected to the same force as the force shown in the embodiment.

  In the said embodiment, although the structure which provided the bending part side protrusion 27 formed in series in the elongate direction of the sealing member 7 in the bending part 18 was shown, this invention is not limited to this, bending Instead of the part-side ridge 27, a configuration in which convex portions are arranged at regular intervals may be employed.

In the above-described embodiment, the configuration in which the sealing member 7 and the proximity member 6 are attached to the inner seal portion 46 corresponding to the apparatus main body 2 side is shown. However, the present invention is not limited to this, and the inner seal portion 46 on the apparatus main body 2 side is provided. Alternatively or in addition, a configuration may be adopted in which a proximity member having the same structure as described above is provided in the outer seal portion 45 on the door 3 side, and a sealing member is attached to the proximity member.
Further, in place of the inner seal portion 46 provided on the apparatus main body 2 side, the proximity member 6 and the sealing member 7 having the same structure as the above embodiment are provided on the opening / closing door 3 side, and the inner sealing portion is provided on the opening / closing door 3 side. A configuration with a function may be used.

DESCRIPTION OF SYMBOLS 1 Environmental test apparatus 2 Main body 3 Opening / closing door
5 Test chamber 6 Proximity member (proximity part)
7 Sealing member 8 Sealing part 9 Mounting related part 11 Opening 12 Extension part 13 Seal side overhanging part (overhanging part)
14 Base overhang (overhang)
16 Bending part engaging groove (engaging groove)
17 Projection engaging groove 18 Bent part 27 Bent part ridge (protrusion)
40 Engagement protrusion (protrusion)
41 Base ridge

Claims (5)

In an environmental test apparatus having a test chamber in which a desired temperature and / or humidity environment is formed, and an opening / closing body capable of opening and closing the opening communicating with the outside with respect to the outside.
It has a sealing member that contributes to maintaining airtightness in the test chamber, and the sealing member is provided in a proximity portion where the test chamber side and the open / close body side face each other when the open / close body is closed. ,
The sealing member has a piece-like seal portion and an attachment-related portion connected to one end portion of the seal portion and related to attachment to the proximity portion,
The attachment-related part is formed of an extension part extending from one end part of the seal part and two or more extension parts that intersect the extension part and project in the same direction. Is provided with a bent portion bent in a direction intersecting the protruding direction of the protruding portion,
The proximity portion has a sandwiched portion, and the sandwiched portion is disposed between adjacent projecting portions, and at least another projecting portion having a bent portion and another projecting portion adjacent to the projecting portion An engagement groove is formed in the sandwiched portion disposed between and
The sealing member takes a holding posture by pushing between the adjacent projecting portions into the sandwiched portion to bring the sandwiched portion into a fitted state, and further engaging the bent portion with the engagement groove. Environmental test equipment. The seal part is a curved shape bent in the outward direction of the opening on the basis of the holding posture of the sealing member,
The overhanging portion is disposed on the curved inner side of the seal portion, and the overhanging portion having the bent portion is located in the vicinity of the proximal end side of the seal portion,
The environmental test apparatus according to claim 1, wherein the bent portion is bent in a direction opposite to a direction in which the seal portion is located.   The environmental test apparatus according to claim 1, wherein the bent portion has a protrusion protruding in a direction approaching the extension portion on a side facing the extension portion.   The environmental test apparatus according to claim 1, wherein the projecting portion having the bent portion has a smaller cross-sectional area toward the tip. One of the pair of overhanging portions that bring the sandwiched portion into a fitted state has a protruding portion that protrudes in a direction facing the bent portion,
The environmental test apparatus according to claim 1, wherein the sandwiched portion has a protrusion engaging groove with which the protrusion is engaged.

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