JPH038355Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a workroom configured such that a worker can work by inserting only his/her arm into the workroom, such as a workroom in a draft chamber or a clean bench. The invention relates to a door device.

[Conventional technology]

The work room of this type of draft chamber is equipped with a large door that can be opened and closed at the front of the work room so that items can be taken in and out of the work room and cleaning can be carried out without any hindrance. By drilling a window hole through which the arm can be inserted, the work can be performed while preventing the scattering of chemicals, etc.;
Publication No. 193142 discloses that a large door is provided with horizontally long window holes on the left and right, and a pair of left and right sliding doors are provided at the locations of the window holes so as to be able to slide horizontally. .

[Problem that the invention attempts to solve]

According to this prior art, by opening either one of the left and right sliding doors relative to the window hole, the worker can work while moving left and right, so that the worker can reach within the working room. It has the advantage of being able to widen the range.

However, work in this type of workroom is not necessarily carried out by one person; in some cases, it may be necessary for multiple people to insert their arms into the workroom and work at the same time. With the structure of the prior art, in which a pair of sliding doors on the left and right sides are provided in the window hole so that they can slide horizontally, only half of the area of the window hole can be opened, so the window hole was formed to have a wide area on the left and right sides. However, there was a problem in that it was difficult for multiple people to insert their arms into the work chamber and work at the same time.

This invention allows even if one person works in the work room.
To provide a door device which allows a plurality of people to work at the same time without opening the front side of a large door more than necessary.

[Means to solve the problem]

In order to achieve this purpose, the present invention provides a work chamber such as a draft chamber in which a large door that closes the opening is attached to an opening formed in the front of the closed working chamber so that the large door can be opened and closed. A plurality of window holes large enough to allow a person's arm to be put in and taken out are bored in the door at appropriate intervals in the left and right direction, and small doors are installed on the front or back side of the large door to individually block each of the window holes. At least the left and right edges of the small door are provided so that they can move up and down in close contact with the front or back surface of the large door, and the left and right edges of the small door are provided at the lower edge of each of the small doors. A fixing member having a clamping piece that comes into contact with the side where the doors are not in close contact is provided so as to extend along the lower edge of each of the small doors, and the clamping piece of each fixing member is attached to each of the fixing members. The structure is such that screw-type fastening means are provided to press both ends of the door against the large door.

[Functions and effects of the idea]

In this configuration, with the large door closed, any small door is slid upward, the screw-type fastening means is rotated, and both left and right ends of the clamping piece of the fixing member are pressed against the large door, and the clamping piece is pressed against the large door. By sandwiching and fixing the left and right edges of the window hole in the large door between the left and right ends of the piece and the left and right ends of the small door, the small door can be fixed at any height position so that it cannot fall.
When the screw-type fastening means is loosened and the large door is released from being held between the holding piece and the small door, the small door can be freely moved up and down.

Therefore, according to the present invention, any window hole can be opened individually, so if one person is working, one window hole can be opened, and if multiple people are working, multiple windows can be opened. By doing this, whether working alone or with multiple people, work can be carried out in a manner that minimizes the spread of chemicals, etc. to workers. It has the effect of being extremely easy to perform.

In addition, each small door can be fixed to the large door at any height, so when handling hazardous materials or toxic gases, prioritize safety by reducing the window opening area to avoid dangerous work. In this way, it is possible to accurately choose between safety and ease of work, depending on the content of the work, such as opening the window wide and giving priority to ease of work.

Furthermore, since each fixing member extends along the lower edge of each small door, each fixing member also functions as a reinforcing member for the lower edge of the small door.
It also has the effect of preventing damage to the lower edge of each small door without providing a separate protective member.

In addition, by sandwiching and fixing the large door between the clamping piece of the fixing member and the small door, the small door can be fixed at an arbitrary height position. It is only necessary to provide a fixing member to the large door, and there is no need to provide a separate member or perform any special processing on the large door, so the structure of the door device can be simplified accordingly.

〔Example〕

Next, an embodiment in which the present invention is applied to a draft chamber will be described based on the drawings. In the drawing, reference numeral 1 indicates a draft chamber in which the front side of the working chamber 1a is wide open over the entire frontage, A large door 3 with a handle 4 that covers the entire opening 2 is installed inside the opening 2 so that its vertical and vertical positions can be adjusted freely. A device 6 is provided, and an air supply device 5 is provided.
An air curtain is formed along the opening 2 by injecting air, while the air in the room is forcibly exhausted by the exhaust device 6 to maintain a negative pressure inside the room, so that the air in the room is forced out from the opening 2. Prevents leakage to the outside.

An operation panel 7 is provided on the front surface of the draft chamber 1.

Three window holes 8 are drilled in the lower half of the large door 3 along the left and right direction, each large enough for a worker to insert both arms and work freely. A small door 9 for covering each window hole 8 is arranged on the back surface of the location so that the left and right edges of the small door 9 are in close contact with the back surface of the large door 3, and A guide body 11 for guiding each of the small doors 9 to move up and down along the back surface of the large door 3 is fixed to the upper portions of the left and right edges of each of the window holes 8.

The large door 3 and the small door 9 are each made of a transparent plate such as an acrylic resin or a glass plate so that the inside can be seen through.

As shown in FIGS. 4 to 8, each of the small doors 9 is constructed such that its height can be adjusted freely by a fixing member 10 made of a metal plate fixed to its lower end.

That is, the fixing member 10 includes an attachment piece 10b fixed to the back surface of the lower end of the small door 9, a connecting piece 10c extending from the lower end of the attaching piece 10b into the window hole 8, and an upward direction from the tip of the connecting piece 10c. The mounting piece 10 is formed into a substantially hollow shape with a reinforcing piece 10d extending from the upper end of the holding piece 10a into the window hole 8.
While fixing b to the small door 9 by an appropriate means such as gluing,
By forming the left and right length of the clamping piece 10a to be longer than the width of the window hole 8, the left and right ends of the clamping piece 10a and the left and right ends of the small door 9 can be connected to the window hole of the large door 3. It is configured so that the left and right end portions of 8 can be sandwiched.

In this case, by forming the left and right ends of the connecting piece 10c and the reinforcing piece 10d into guide portions that are in close contact with the left and right inner surfaces of the window hole 8, the small door 9 can be connected to the large door 3.
It is constructed so that it can smoothly slide up and down along the back surface of the.

A bolt 12 as a screw type fastening means is attached to the mounting piece 10b of the fixing member 10.
is fixed so as to extend through the clamping piece 10a, and a nut 13 is screwed onto the bolt 12 from the surface direction of the clamping piece 10a.
is screwed in to deform the fixing member 10 against elasticity, and presses both ends of the clamping piece 10a against the surface of the large door 3, so that the left and right edges of the small door 9 and the left and right ends of the clamping piece 10a close the large door 3. By pinching the left and right side parts of the window hole 8, the small door 9 can be fixed to the large door 3 at any height position.

In this case, the clamping piece 1 of the fixing member 10
Cushion material 14 having appropriate elasticity and coefficient of friction, such as rubber, is pasted on the inner surfaces of both left and right ends of 0a, that is, the contact points with the outer surface of the large door 3, and fixed in the raised position. This prevents the small door 9 from accidentally sliding down. Further, a groove 9a for passing the bolt 12 is cut out at the lower end of the left and right middle portion of the small door 9.

Note that the bolt 12 and nut 13 are
As shown by the dashed line in the figure, two locations may be provided at both left and right ends of the fixing member 10. Also,
In the embodiment, the bolt 12 and nut 13 were used as the screw-type fastening means, but as the screw fastening means, only a bolt with a cutout like a butterfly bolt was used. , clamping piece 10a
It is also possible to screw it into a female threaded hole drilled in the mounting piece 10b while passing through the mounting piece 10b.

In the above configuration, by moving the large door 3 upward to fully open the opening 2, it is possible to take equipment in and out of the work room and to clean it without any hindrance. By raising one of the small doors 9 to the upper position and tightening the nut 13 to fix it in the raised position, it is possible to insert an arm into the work chamber 1a through the opened window hole 8 and perform various operations. .

In this case, each window hole 8 is opened by individually sliding each small door 9 up and down, and since any window hole 8 can be opened individually and selectively, one person can By opening one window 8 when working with a person, and opening multiple windows 8 when working with multiple people, even when working alone, multiple people can work together. Even when working, it is possible to perform the work extremely easily while minimizing the scattering of chemicals and the like to the workers.

In addition, each small door 9 can be fixed at any height so that it cannot fall, so when handling hazardous materials or toxic gases, the opening area of the window hole 8 can be made small to prioritize safety. When the work is not being carried out, the window hole 8 is opened wide to give priority to the ease of work, and the choice between safety and ease of work can be made accurately according to the content of the work. be.

Furthermore, since the fixing member 10 extends along the lower edge of the small door 9, the fixing member 10 plays a role as a reinforcing member for the lower edge of the small door 9. Even if the small door 9 is of low strength, damage to the small door 9 can be prevented.

In addition, when the reinforcing piece 10d extending toward the inside of the window hole 8 is bent and formed on the clamping piece 10a of the fixing member 10 as in the embodiment, the clamping piece 10a
Since the small door 8 is prevented from being bent and deformed in the front-rear direction, the advantage is that the small door 9 can be securely fixed even if the clamping piece 10a is fastened at one place. be.

Furthermore, if both the left and right ends of the fixing member 10 are configured as guide parts, the small door 9 can be smoothly moved up and down simply by providing the guide body 11 at the top of the large door 3, which reduces the number of parts in the door device. This has the advantage of preventing an increase in the manufacturing cost of the door device.

In the above embodiment, the large door 3 was provided on the inner surface of the working chamber 1a, but the large door 3 may be configured to move up and down along the outer surface of the working chamber 1a. The small door 9 may be arranged along the outer surface of the large door 3.

Furthermore, the present invention also applies to work rooms such as draft chambers and clean benches that have openings formed on multiple sides of the work room so that workers can insert their arms from multiple sides into the work room. Further, the present invention can be applied not only to a workroom in which the large door moves up and down, but also to a workroom in which the large door is structured as a sliding door.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the draft chamber, and FIG. 2 is a perspective view of the draft chamber.
3 is a front view of the main part of FIG. 1, FIG. 4 is a sectional view of FIG. 3, FIG. 5 is a sectional view of FIG. 3, and FIG. 6 is a sectional view of FIG. FIG. 7 is a cross-sectional view taken from FIG. 5, and FIG. 8 is a perspective view of the small door. 1...Draft chamber, 1a...Working room,
2...Opening, 3...Large door, 5...Air supply device, 6
...Ventilation system, 8...Window hole, 9...Small door, 10...
...fixing member, 10a... clamping piece, 12... bolt, 13... nut.

Claims (1)

[Scope of utility model registration request] Opening 2 formed in the front of the closed work chamber 1a
In a working room such as a draft chamber, which is equipped with a large door 3 that closes the opening 2 so as to be openable and closable, a window hole 8 large enough to allow a person's arm to be put in and taken out is provided in the large door 3 in the left and right direction. A plurality of small doors 9 are drilled at appropriate intervals on the front or back surface of the large door 3 to individually close each window hole 8, and at least both left and right edges of the small door 9 are on the surface of the large door 3. Or each is provided so as to move up and down in close contact with the back surface, and on the lower edge of each of these small doors 9, both left and right ends are connected to the side of the front and back surfaces of the large door 3 that the small door 9 is not in close contact with. Fixing member 1 with abutting clamping piece 10a
0 is provided to extend along the lower edge of each small door 9, and each fixed member 10 is provided with a
1. A door device for a work room such as a draft chamber, characterized in that screw-type fastening means 13 are provided to press both ends of the clamping piece 10a against the large door 3.