JPH06117992A - Door device for environmental tester - Google Patents

Abstract

PURPOSE:To obtain an environmental tester which does not need a dead space for turning or laterally sliding a door and still has a simple structure and a low cost. CONSTITUTION:A door device for an environmental tester is for closing an opening 4 of a testing chamber 3 of an environmental tester body 1, and comprises an outer door 10 vertically movable with respect to the opening 4, a guide elevating mechanism 6 for guiding the door 10 to vertically move the door 10, an inner door 11 for sealing the opening 4, a linkage 15 for coupling the door 11 to the door 10, a positioning mechanism 7 for positioning the door 11 to an opening sealing position, and an energizing spring 16 of the door 11. The linkage 15 so connects the door 11 to the door 10 as to relatively move between an initial position and an advanced position near the opening 4 from the initial position, and the spring 16 energizes the door 11 upward to the door 10. The mechanism 7 is engaged with the door 11 when the door 10 is disposed oppositely to the opening 4 to position the door 11 to a sealed position of the opening against the spring 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetically sealed door device used in an environment test device such as a constant temperature device, a constant temperature and humidity device, and a thermal shock device for conducting reliability tests on various parts and devices.

[0002]

2. Description of the Related Art Generally, an environmental test apparatus has an opening on the front surface through which a sample is taken in and out, and the opening is opened and closed by a door. The door is connected to the main body of the device by a hinge and is opened / closed by the swinging motion of the door. The door is attached to the main body of the device so as to be slidable in the left-right direction, and the door is separately provided at the closed position by the driving means. There is a device which is pressed in the opening direction so as to be in close contact with the seal member at the peripheral edge of the device opening.

[0003]

However, in the case of the door that performs the turning operation, a large space for opening and closing the door is required in front of the device, and the space cannot be used for anything other than opening and closing the door. It has become a space. Also, in the case of the sliding door, there is a problem that a space for opening and closing the door is required beside the device.

Further, in the case of the slide type door, there is a problem that the driving means for pressing the door against the sealing member of the apparatus opening and bringing them into close contact with each other is complicated and expensive as mentioned above. Therefore, it is an object of the present invention to provide an environmental test device that does not require a dead space for turning a door or slides left and right, and yet can be configured simply and inexpensively.

[0005]

In order to solve the above problems, the present invention is directed to a door assembly in a vertical direction from an opening open position deviated from a test chamber opening of an environmental test apparatus main body to a closed position of the opening. The present invention provides a door device that can be reciprocated and can keep the door assembly open and sealed by a simple mechanism, and is configured as follows.

That is, in the door device according to the present invention, an outer door which can be raised and lowered between a facing position facing the opening and an open position vertically deviating from the facing position, and the outer door facing each other. A guide elevating mechanism for guiding and elevating between a position and an open position, an inner door that abuts a peripheral wall portion of a device body surrounding the opening to seal the opening, and the inner door is connected to the outer door. A link mechanism is included. By the link mechanism, the inner door is connected to the outer door so as to be relatively movable between an initial position and a forward position closer to the opening than the initial position. Further, a biasing mechanism that biases the inner door with respect to the outer door in a direction from the facing position of the outer door to the open position, and engages the inner door when the outer door is at the facing position. And a positioning mechanism that moves the inner door from the initial position to the forward position against the biasing mechanism and positions the inner door at the opening sealing position.

The positioning mechanism can be constituted by a rod-shaped member fixed to the apparatus body, or can be constituted by a piston cylinder mechanism supported by the apparatus body. In the case of a piston cylinder mechanism, its piston rod engages the inner door. The urging mechanism can be constituted by, for example, a spring provided between the outer door and the link mechanism.

[0008]

When the opening of the test chamber of the apparatus main body is opened, the outer door is at the opening open position vertically separated from the opening, and the inner door occupies substantially the same position as the outer door. At the opening open position, the positioning mechanism is not engaged with the inner door, so the inner door is biased by the biasing mechanism to occupy the initial position.

When the opening of the apparatus main body test chamber is closed, the outer door is raised to the facing position by the guide lifting mechanism. Almost at the same time when the outer door reaches the facing position, the positioning mechanism engages with the inner door, and the inner door is moved relative to the outer door from the initial position to the forward position against the biasing mechanism. , Closes the opening in close contact with the peripheral wall portion around the opening in the advanced position.

When the outer door is lowered from the opening closed state, the inner door moves relative to the outer door simultaneously with the start of the descent due to the action of the link mechanism and the biasing mechanism. Therefore, the inner door returns to the initial position and is released from the close contact state with the opening peripheral wall portion. This prevents the inner wall from rubbing against the peripheral wall when the outer door descends together with the outer door.

[0011]

1 is a schematic vertical sectional view of an embodiment of the invention, and FIG. 2 is a view taken along the line II-II of FIG. In FIG. 1, the environmental testing device includes a device body 1 and a door device 2. The apparatus main body 1 has a test chamber 3 for accommodating a sample therein. The test chamber 3 can communicate with an external space through an opening 4 on the front surface of the device body 1. Test room 3 (not shown in the drawing)
An air-conditioning unit is provided continuously to obtain a desired temperature or temperature / humidity atmosphere.

The door device 2 is provided with a door assembly 5, a guide lifting mechanism 6 (FIG. 2), and a positioning mechanism 7. The door assembly 5 is guided and driven by the guide elevating / lowering mechanism 6 to face the opening 4 (a position shown by a solid line in FIGS. 1 and 2) and an open position below it (a virtual line in FIGS. 1 and 2). Position
Move between and. A sample can be taken in and out of the test chamber 3 through the opening 4 when the door assembly 5 is in the open position.

The door assembly 5 includes an outer door 10 and an inner door 11. The outer door 10 is a substantially box-shaped exterior frame that opens to the opening 4 side, and the inner door 11 is housed inside the outer frame. The inner door 11 is composed of a plate-shaped body that houses a heat insulating material, and is in a vertical posture parallel to the opening surface of the opening 4. An airtight seal 12 is provided on the peripheral portion of the surface of the inner door 11 facing the opening 4. The seal 12 may be attached to the peripheral wall 14 surrounding the opening 4 of the apparatus body 1.

Further, the door assembly 5 is provided with a link mechanism 15 and a tension coil spring 16. As shown in FIG. 2, two link mechanisms 15 are provided on the left and right side portions of the door assembly 5 at intervals of two vertically. As shown in Figure 1,
Each link mechanism 15 includes a lever 17, and a support shaft pin 18 that rotatably connects the central portion of the lever 17 to the outer door 10.
A connecting pin 19 that rotatably connects one end of the lever 17 to the inner door 11 is provided. These pins 18 and 19 extend in the width direction of the door assembly 5, that is, in the direction parallel and horizontal to the opening surface of the opening 4. The link mechanism 15 is shown in FIG.
As seen from the side, it is bent, specifically,
In the initial position shown by the solid line in FIG. 1, the connecting pin 19 occupies a position above the spindle pin 18 and slightly retracted from the opening 4 and displaced. The other end of the link mechanism 15, that is, the end opposite to the connecting pin 19 is located farther from the opening 4 than the support shaft pin 18.

The tension coil spring 16 extends substantially in the vertical direction, and its upper end is connected to the other end of the lever 17 and its lower end is connected to a connecting portion such as a bracket provided on the outer door 10. The positioning mechanism 7 is constituted by a vertical air piston cylinder 20 in the illustrated embodiment, and is provided above both side portions of the door assembly 5 in the raised position (position facing the opening). The cylinder body of the air cylinder 20 is fixed to the upper part of the apparatus body 1 via a bracket. The piston rod 22 of the air cylinder 20 projects downward from the cylinder body and has a roller 23 or other suitable engaging portion at the lower end.

When the door assembly 5 is in the raised position shown by the solid line in FIG. 1, the piston rod 22 protrudes downward through an opening provided in the upper wall of the outer door 10, and the roller 23 of the inner door 11 extends. It is in contact with the upper end surface. The roller 23 is rotatably connected to the lower end of the piston rod 22 via a support shaft extending in the door width direction. Therefore, with the roller 23 in contact with the upper end of the inner door 11, the inner door 11 can be reasonably moved in the direction approaching the opening 4 and the opposite direction.

As shown in FIG. 2, the guide lifting mechanism 6 has two
They are provided individually and are arranged on the outer side (left side and right side) in the width direction of the door assembly 5. Each guide lifting mechanism 6 includes a vertical air piston cylinder 25 extending along the side edge of the door assembly 5 and a guide rail mechanism 26. The air cylinder 25 has a cylinder body fixed to the apparatus body 1 (FIG. 1), a piston rod 27 protruding downward from the cylinder body, and connected to the outer door 10 via a bracket 270. The guide rail mechanism 26 has a nesting structure which is already known in itself, and includes an outer rail 261 and an inner rail 262, and extends in a contracted state shown by a solid line in FIG. 2 and extends downward as shown by an imaginary line. Can be expanded and contracted between the stretched state. The outer rail 261 is fixed to the apparatus main body 1, and the inner rail 262 can move so as to expand and contract with respect to the outer rail as the outer door 10 moves up and down.

Each guide rail mechanism 26 is located between the air cylinder 25 and the side edge of the door assembly 5,
When the door assembly 5 is in the lower open position, the guide rail mechanism 26 does not interfere with sample loading and unloading through the opening 4. When the door assembly 5 is located at the upper opening facing position, the lower end of the guide rail mechanism 26 is located at substantially the same position as the lower end of the door assembly 5.

The air cylinder 25 raises and lowers the door assembly 5 between the upper opening facing position and the lower opening position as described above. In order to position the door assembly 5 accurately and firmly at those positions. In the illustrated embodiment, a so-called fall prevention type cylinder is used as the air cylinder 25. In addition to the piston / cylinder mechanism for driving the piston rod 27, this cylinder is provided with a pair of auxiliary piston / cylinder mechanisms 28 for fixing the piston rod 27 at the positions corresponding to the above-mentioned positions. There is. As such a drop-prevention type cylinder device, for example, a "CMA2-Q" type cylinder device or a "SCA2-Q" type cylinder device manufactured by KD Corp. can be used.

The operation will be described. When the piston rod 27 is projected, the guide rail mechanism 26 is in an extended state,
The door assembly 5 occupies the aforementioned lowered position (opening position). When the piston rod 27 is retracted upward from this state, the guide rail mechanism 26 is also contracted, and the outer door 10 is guided to and supported by the guide rail mechanism 26 and rises to the opening facing position. The inner door 11 is the outer door 1 via the link mechanism 15.
Since it is connected to 0, the inner door 11 also rises to almost the same position as the outer door 10 and faces the opening 4.

When the door assembly 5 reaches the raised position, the air cylinder 20 is driven, and the roller 23 at the lower end of the piston rod 22 engages with the upper end of the inner door 11 to push the inner door 11 downward. Until then, the inner door 11 is held at the initial position by the spring 16 via the link mechanism 15 and apart from the opening 4. However, the inner door 11 is initially pushed by the piston rod 22 and the lever 17 pivots. From the position, the seal 12 moves obliquely downward to the forward position on the side of the opening 4, and the seal 12 comes into close contact with the opening peripheral wall portion 14 around the opening 4. As a result, the test chamber 3 is hermetically closed.

When the opening 4 is opened, the outer door 10 in the raised position is lowered by the guide elevating mechanism 6 to the lower open position. Simultaneously with the start of this descending operation, the inner door 11 is locked by the action of the link mechanism 15 and the spring 16.
It moves obliquely upward relative to 0, moves away from the opening peripheral wall portion 14 and returns to the initial position. Therefore, in the descending operation of the door assembly 5, the seal 12 does not descend while rubbing against the opening peripheral wall portion 14.

Although the air cylinder 20 is used as the positioning mechanism in the above embodiment, a rod-shaped member may be used instead of the air cylinder 20. In that case, the rod-shaped member is fixed to the apparatus main body 1, and as the door assembly is raised,
The rod-shaped member pushes down the upper end of the inner door 11. Further, according to the present invention, the structure of each part of the door apparatus of the above embodiment may be turned upside down, and the opening may be closed by moving the door assembly from top to bottom.

[0024]

As described above, according to the present invention, it is possible to provide a door device for an environmental testing device which does not require a dead space for turning the door or sliding left and right and yet can be constructed simply and inexpensively. it can.

[Brief description of drawings]

1 is a schematic vertical sectional view of an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

[Explanation of symbols]

 1 Device Main Body 2 Door Device 3 Test Room 4 Opening 5 Door Assembly 6 Guide Elevating Mechanism 7 Positioning Mechanism 10 Outer Door 11 Inner Door 12 Seal 14 Open Circumferential Wall 15 Link Mechanism 16 Spring 17 Lever 18 Spindle Pin 19 Connecting Pin 20 Air Piston cylinder 22 Piston rod 23 Roller 25 Air piston cylinder 26 Guide rail mechanism 27 Piston rod

Claims (4)

[Claims] 1. A door device for closing an opening of a test chamber of a main body of an environmental testing device, which can be raised and lowered between a facing position facing the opening and an opening position vertically displaced from the facing position. An outer door, a guide elevating mechanism for elevating and lowering the outer door between the facing position and the open position, and an inner door capable of abutting a peripheral wall portion of the apparatus body surrounding the opening to seal the opening, A link mechanism that connects the inner door to the outer door, a positioning mechanism that positions the inner door at a position that seals the opening, and a biasing mechanism of the inner door, and the link mechanism includes the inner door. Is movably connected to the outer door between an initial position and a forward position closer to the opening than the initial position, and the biasing mechanism connects the inner door to the outer door. Attached to the door in the direction from the facing position of the outer door to the open position. The positioning mechanism engages the inner door when the outer door is in the facing position, and moves the inner door from the initial position to the forward position against the biasing mechanism. A door device for an environmental testing device, which is moved and positioned at the opening sealing position. 2. The door device for an environmental testing device according to claim 1, wherein the positioning mechanism is a rod-shaped member fixed to the device body. 3. The door device for an environmental testing device according to claim 1, wherein the positioning mechanism is a piston cylinder mechanism supported by the apparatus body, and a piston rod of the piston cylinder mechanism engages with the inner door. 4. The door device for an environmental testing device according to claim 1, wherein the urging mechanism is a spring provided between the outer door and the link mechanism.