JPH1147617A - Draft chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to replace easily a light source of a light fitment from a front surface side of a main body by forming an opening at a front side of a space for a light provided at an upper front part of a treating chamber and providing a freely attachable and detachable check panel so that it covers the opening. SOLUTION: Relating to a draft chamber 1 in which an experiment accompanied with a generation of gas is executed, the space for the light is provided at the upper front part of the treating chamber 5 of the chamber main body 2, and the light fitment 7 is provided in the space 6 and an air curtain box 4 is provided so that it covers the opening 8 formed at the front surface of the main body on the front side of the space for the light. In such a case, relating to the air curtain box 4, an opening and closing door 10 are provided at the front surface of the box main body 9, and a filter 11 is provided at inside and also the freely attachable and detachable check panel 2 is provided on a rear surface side. That is, a replacement of the light source is possible by opening the check panel 12 by forming a rear surface opening in accordance with the opening 8 of the draft chamber main body 2 at the rear surface side of the box main body 9 so that the opening may be covered with the check panel 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a draft chamber of an air curtain type, and more particularly, to a work of replacing a light source of a lighting device provided in a lighting space isolated from a processing chamber and a damper angle of an upper exhaust duct. The present invention relates to a draft chamber that is easy to maintain including adjustment.

[0002]

2. Description of the Related Art Conventionally, an illumination space separated from a processing chamber of a draft chamber body is provided at an upper front portion of the processing chamber.
An air curtain type draft chamber having a structure in which a lighting fixture is mounted in the space, an exhaust duct is provided in an upper rear portion of the processing chamber, and an air curtain box is integrally or optionally provided in an upper front portion of the main body is provided. ing.

[0003] Usually, an experiment involving the generation of gas is performed in the processing chamber of the draft chamber. Therefore, the lighting fixture is installed in an illumination space completely isolated from the processing chamber. In addition, in many cases, experimental equipment is still installed inside the processing room.If the light source of the lighting fixture deteriorates or cuts out in such a situation, the upper body is positioned in the processing room to increase the lighting space. It is virtually impossible to replace the light source of the lighting fixture by removing the partitioning cover.

Therefore, in order to replace the light source of the lighting fixture,
For example, if there is enough space above the draft chamber, remove the top plate of the main body of the draft chamber and insert your hand from above to replace the light source, but the light source is attached to the lighting fixture downward, and the draft chamber When the height of the main body is high and an air curtain box is present in front of the main body, the operation becomes very difficult. That is,
If the air curtain box is integrated with the draft chamber body, or if it can be optionally installed on the upper front of the draft chamber body, the upper front of the body is fixed. In order to replace the light source in such a case, the experiment in the processing chamber must be interrupted, the experimental equipment must be removed, and then the processing must be performed from the inside of the processing chamber. However, such replacement work is not possible when an important experiment is being performed, and at present, it is continued until a series of experiments is completed without illumination even if the operation is somewhat inconvenient.

On the other hand, an exhaust duct and a damper for adjusting the flow rate are provided at the upper part of the draft chamber main body. Usually, the draft chamber main body is a horizontally long box body, and the exhaust duct is provided at the center of the upper surface. Is provided, when a plurality of draft chambers are arranged side by side or when the space between the draft chambers is small, maintenance including adjustment of the angle of the exhaust duct and the damper from the side is difficult.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention is to solve the problem by providing an illumination space separated from the processing chamber at the upper front of the processing chamber of the draft chamber body. The point of providing a draft chamber in which a light source of a lighting device can be easily replaced from a front side of a main body and maintenance including adjustment of a damper angle of an upper exhaust duct can be easily performed in a draft chamber in which a lighting device is mounted. It is in.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an air curtain box having a downwardly-directed air supply port at an upper portion of a front surface of a draft chamber main body, and an air curtain box above a processing chamber of the draft chamber main body. A draft chamber provided with a lighting space separated from the processing chamber at a front portion thereof, and a lighting device mounted in the space, wherein an opening is formed in a front surface of a main body on a front side of the lighting space, The curtain box has an opening / closing door on the front surface of the box body and has a detachable filter inside, and a detachable inspection panel is provided on the rear side corresponding to the opening so as to cover the opening from the front from the front. A draft chamber was formed in which the light source removably attached to the lighting device could be oriented toward the opening.

[0008] The illumination device is rotatably provided so that the light source is oriented toward the opening.
It is more preferable to provide a locking means for maintaining a state in which the light source of the lighting device is oriented toward the lower processing chamber and a state in which the light source is oriented toward the opening.

Further, the present invention is a draft chamber provided with an air curtain box having an air supply port facing downward at an upper portion of a front surface of a draft chamber body, wherein the air curtain box has an opening / closing door on a front surface of the box body. A draft chamber having a detachable filter inside and a detachable inspection panel on the rear side from the front corresponding to an opening formed on the upper front side of the processing chamber of the draft chamber main body. did.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Fig. 1 shows a draft chamber 1 according to the present invention, Figs. 2 to 4 show details of each part, Figs. 5 to 7 show main parts of the present invention, and reference numeral 2 in the figure denotes a draft chamber main body. Illumination devices 4 indicate air curtain boxes.

In the draft chamber 1 of the present embodiment, an illumination space 6 isolated from the processing chamber 5 is provided at an upper front portion of the processing chamber 5 of the draft chamber main body 2, and a lighting fixture 7 is mounted in the space 6. , An air curtain box 4 is provided on the upper front part of the main body 2. An opening 8 is formed in the front surface of the main body on the front side of the lighting space 6, and the air curtain box 4 is provided so as to cover the opening 8. Here, the air curtain box 4
Has an opening / closing door 10 on the front surface of the box body 9 and detachable filters 11 and 11 inside,
This is a structure having a detachable inspection panel 12 on the rear side from the front. The lighting fixture 7 is rotatable so that the light sources 13, 13 such as fluorescent lamps, which are detachably attached to the lighting fixture 7, are oriented toward the opening 8. , 14. In addition, the draft chamber 1 having a structure in which the air curtain box 4 does not exist.
In this case, the inspection panel 12 is detachably mounted directly on the main body 2 so as to cover the opening 8 of the draft chamber main body 2.

More specifically, the draft chamber main body 2 is provided with an exhaust duct port 15 at an upper rear portion of the processing chamber 5 and a damper 16A for adjusting a flow rate above the exhaust duct port 15. An exhaust duct 16 is provided, and a front opening 17 provided on the front side excluding the upper part is provided with a glass door 18 which can be opened and closed up and down.
Is provided with a support rod 19 for supporting a laboratory instrument on its inner rear surface. The lighting space 6 is
It is formed so as to be isolated from the processing chamber 5 by a light transmitting plate 20.

The air curtain box 4 has a filter 11, which is usually provided with an inspection panel 12, and is provided with a filter 11, a mesh panel or the like for purifying the air supply, averaging the air pressure, and equalizing the air supply. 11 is attached, and the door 1
0 is closed, the air sent from the air supply duct 21 provided at the upper part is passed through the filters 11 and 11, then blown out from the punching plate 23 provided at the air inlet 22 at the lower end, and opened upward to a predetermined position. An air curtain is formed toward the front opening 17 below the glass door 18, and exhaust air is exhausted from the exhaust duct 16, thereby sucking odors and the like in the processing chamber 5 from the exhaust duct port 15, and The odor is prevented from leaking to the outside.

The air curtain box 4 has a rear opening 24 formed on the rear surface of the box main body 9 so as to correspond to the opening 8 of the draft chamber main body 2. The rear opening 24 is provided with the inspection panel 12 from the front. It can be closed by mounting and can be opened by removing the inspection panel 12. The back opening 24 communicates with the opening 8 in front of the lighting space 6, and opens and closes the door 10, removes the filters 11, 11, and removes the inspection panel 12. Is opened to the front side and the damper 16 of the exhaust duct 16 is opened.
A is also exposed on the front side. The back opening 24 is formed over the entire length of the box body 9 in the lateral direction,
Both sides of the inspection panel 12 are detachably screwed to the rear ends of the side plates 9A, 9A of the box body 9 (not shown). The filter 11 is provided with receiving portions 25, 25 fixed in the depth direction on both side surfaces of the air curtain box 4.
The two side edges are placed on the main body and can be detachably mounted. Here, a sealing material is provided around the frame body of the filter 11, and when the opening / closing door 10 is closed in a state where the sealing material is mounted inside the box body 9, the sealing material becomes The surface and the inner surface of the door 10 are pressed against and sealed, and no special material such as a screw is provided. The lower end of the opening and closing door 10 is hinged at hinges 26 and 26 so as to be freely openable and closable, and a fastening device (not shown) for maintaining a closed state is provided at an upper portion. .

The illuminating device 3 has both ends of the illuminating device 7 rotatably mounted on both side plates 14 and 14 forming the illuminating space 6 with horizontal support shafts 27 and 27.
A locking means 28 is provided for maintaining a state in which the light source 13 of the lighting device 7 is oriented toward the processing chamber 5 below and a state in which the light source 13 is oriented toward the opening 8. In this embodiment, as shown in FIG. 3 and FIG.
8, a bar 29 is provided on one side or both sides of the front end of the lighting fixture 7 and protrudes and retracts laterally, and a plurality of engaging holes 30 are provided in the side plate 14 corresponding to the bar 29. The lighting fixture 7 is maintained in an immovable state by engaging the bar 29 in a predetermined engaging hole 30. Specifically, the lighting fixture 7 is in a horizontal state, that is, a state in which the light source 13 faces the lower processing chamber 5, the lighting fixture 7 is in a vertical state, that is, the light source 13 is completely facing the opening 8, and the lighting When the tool 7 is inclined at about 45 degrees, that is, when the light source 13 is inclined toward the opening 8, the engagement holes 30,...

In a normal use state, the bar 7 is engaged with the engaging hole 30 so that the lighting fixture 7 is horizontal.
The inside of the processing chamber 5 is illuminated by the light sources 13 and 13 directed to the lower processing chamber 5. Therefore, the light source 1
In the case where the air conditioner 3 is deteriorated or cut off, the opening / closing door 10 of the air curtain box 4 is opened, the filters 11 and 11 inside are removed, the inspection panel 12 is removed, and the rear opening 24 is opened. Then, the lighting fixture 7 is exposed through the inside of the air curtain box 4 (see FIG. 5). In this state, the light source 13 of the lighting fixture 7 faces downward, and it is difficult to attach and detach the light source 13. Therefore, the bar 29 is pulled out from the engagement hole 30, and the lighting fixture 7 is moved around the support shafts 27, 27. The light source 13 is oriented so as to face the opening 8 and is set to an inclined state or a vertical state, and the bar 29 is again engaged with the corresponding engaging hole 30 to maintain the state (FIGS. 6 and 7). reference). Then, a hand is inserted from the inside of the air curtain box 4 through the back opening 24 and the opening 8 of the draft chamber main body 2, and the light source 13 facing the opening 8 is detached. After replacing the target light source 13, the lighting fixture 7 is returned to the original state in which the light source 13 is directed downward, and the inspection panel 12 is attached, and the rear opening 24 is mounted.
Is closed, the filters 11, 11 are mounted at predetermined positions, the opening and closing door 10 is closed, and a series of operations is completed. All of these operations for replacing the light sources 13 can be performed from the front side of the draft chamber 1. Similarly, maintenance such as checking the exhaust duct 16 provided with a damper 16A provided in the center of the upper surface of the draft chamber main body 2 and adjusting the angle of the damper 16A to adjust the flow rate is also performed from the opening 8. be able to. Further, although not shown, a drive unit for a glass door 18 for opening and closing the front opening 17 is provided on the upper portion of the draft chamber main body 2, and maintenance of this drive unit can be performed in the same manner.

However, in the present invention, the lighting fixture 7
The rotating mechanism for directing the light source 13 to the processing chamber 5 and the opening 8 is not limited to the pivoting mechanism using the support shaft 27, and the lighting fixture 7 is connected to the lighting space 6 via a free arm or a link mechanism. It is also contemplated to be mounted within. Similarly, in the present invention, the locking means 28 for maintaining the state in which the lighting fixture 7 is oriented in a predetermined direction is not limited to the locking rod 29 and the engagement hole 30. Although various locking structures can be adopted, it is necessary that the operation can be easily performed by inserting a hand from the inside of the air curtain box 4 through the back opening 24 and the opening 8 of the draft chamber main body 2.

Next, the light source 13 will be described with reference to FIGS.
A description will be given of another mounting structure of the lighting fixture 7 which can be oriented toward the opening 8. The lighting fixture 7 has a light source 13 such as a fluorescent lamp removably attached along the inside of a hood 31 that is open downward and has a substantially U-shaped cross section. 32 protruding. In addition, the holding fittings 3 are provided along both side plates 14 and 14 of the lighting space 6.
3 or 33, or the side plate 14 itself is
The holding bracket 33 is provided with a shoulder 34 for supporting the locking portion 32 of the lighting fixture 7 at an upper portion thereof, and an inward folded piece 35 formed at an upper end thereof is provided with the hood 3.
A step 36 is formed to stop the rear end of the step 1. And
When the lighting fixture 7 is mounted in the lighting space 6, the lower part of the hood 31 is fitted between the holding fittings 33, 33, and the locking portions 32, 32 at both ends are connected to the holding fittings 33, 33. The rear end of the hood 31 is supported on the shoulders 34, 34 and the step 3
6 and 36, the light source 13 faces the lower light-transmitting plate 20.

When replacing the light source 13 of the lighting fixture 7, the opening and closing door 10 of the air curtain box 4 is opened as described above, the filters 11, 11 are removed, and the inspection panel 12 is removed to the front to open. Open the part 8. And
As shown in FIG. 11, the user inserts his hand from the front of the box body 9 and lifts the hood 31 while holding the light source 1.
3 with the hood 31 with one hand.
The light source 13 is replaced while supporting the light source, and then the lighting fixture 7 is mounted at a predetermined position as described above.

[0020]

According to the draft chamber of the present invention described above, the inspection panel is removed from the front side of the draft chamber to expose the opening, and the lighting device is displaced so that the light source is oriented toward the opening. The light source can be easily replaced by inserting a hand through the opening from the inside of the air curtain box, and a series of replacement work of the light source can be performed from the front side of the draft chamber. It can be performed even if it is arranged. Also, a draft space is provided in the upper front part of the processing chamber of the draft chamber main body, which is provided with an illumination space separated from the processing chamber, a lighting fixture is mounted in the space, and an air curtain box is provided in the upper front part of the main body. Even if it is, the opening and closing door of the air curtain box is opened, the filter inside is removed, and after the inspection panel is removed, the light source can be easily replaced as described above. Also, maintenance including adjustment of the angle of the exhaust duct provided at the upper part of the draft chamber main body and the damper for adjusting the flow rate thereof can be easily performed through the opening.

In the case where a locking means for maintaining a state in which the light source of the lighting device is oriented toward the lower processing chamber and a state in which the light source is oriented toward the opening is provided, the It is not necessary to support the tool with one hand so that the tool does not move, and since the replacement work can be carried out with both hands holding the light source, not only is the work easy, but also the light source may suddenly collide with other parts and be damaged. Is also small.

[Brief description of the drawings]

FIG. 1 is an overall simplified sectional view of a draft chamber according to the present invention.

FIG. 2 is an exploded perspective view of the air curtain box.

FIG. 3 is a simplified perspective view showing a main part of the lighting device of the present invention.

FIG. 4 is a perspective view showing an example of a locking means.

FIG. 5 is a partial cross-sectional view showing a state where an opening / closing door of an air curtain box is opened and a filter and an inspection panel are removed.

FIG. 6 is a partial cross-sectional view showing a replaceable state in which a lighting device is inclined by about 45 degrees so that a light source faces an opening.

FIG. 7 is a partial cross-sectional view showing a replaceable state in which a lighting device is vertical so that a light source is completely directed to an opening.

FIG. 8 is a partial simplified cross-sectional view showing another embodiment of a lighting device.

FIG. 9 is also a simplified plan view.

FIG. 10 is an exploded perspective view of the main part.

FIG. 11 is a partial simplified cross-sectional view showing a state where the light source is directed to the opening.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Draft chamber 2 Draft chamber main body 3 Lighting device 4 Air curtain box 5 Processing room 6 Lighting space 7 Lighting tool 8 Opening 9 Box main body 10 Opening door 11 Filter 12 Inspection panel 13 Light source 14 Side plate 15 Exhaust duct opening 16 Exhaust duct 17 Front opening 18 Glass door 19 Support rod 20 Translucent plate 21 Air supply duct 22 Air supply port 23 Punching plate 24 Back opening 25 Receiving part 26 Hinge 27 Support shaft 28 Locking means 29 Bar rod 30 Engagement hole 31 Food 32 Locking part 33 Holding bracket 34 Shoulder 35 Folded piece 36 Step

Claims (4)

[Claims] An air curtain box having an air supply port facing downward is provided at an upper part of a front surface of a draft chamber main body, and an illumination space isolated from the processing chamber is provided at an upper front part of a processing chamber of the draft chamber main body. A draft chamber in which a lighting fixture is mounted in a space, wherein an opening is formed in a front surface of a main body on a front side of the lighting space, wherein the air curtain box has an opening / closing door on a front surface of the box main body and has an interior. A light source having a removable filter provided on the rear side corresponding to the opening and a removable inspection panel provided to cover the opening from the front, and a light source removably attaching the lighting device to the lighting device. A draft chamber characterized in that it can be oriented toward the opening. 2. The draft chamber according to claim 1, wherein the lighting fixture is rotatably provided so that the light source is oriented toward the opening. 3. A locking means for maintaining a state in which the light source of the lighting device is oriented toward the lower processing chamber and a state in which the light source is oriented toward the opening. 2. The draft chamber according to 2. 4. A draft chamber provided with an air curtain box having an air supply port facing downward at an upper part of a front surface of a draft chamber main body, wherein the air curtain box has an opening / closing door on a front surface of the box main body and has an interior. A draft panel having a detachable filter on the rear side and a detachable inspection panel provided on the rear side from the front corresponding to an opening formed on the upper front side of the processing chamber of the draft chamber body.