JP5762384B2 - Box type vacuum dryer - Google Patents

Description

  The present invention relates to a box-type vacuum dryer including an airtight container having an opening, a door that opens and closes the opening of the airtight container, and swinging means that supports the door so as to be swingable. Specifically, the present invention relates to a box-type vacuum dryer that can greatly reduce the space required to open and close the door.

  A box-type vacuum dryer is used when the workpiece is heated and dried under vacuum. As the box type vacuum dryer, there is a shelf type box type vacuum dryer.

  1A and 1B are schematic views showing a conventional shelf-type box-type vacuum dryer, in which FIG. 1A is a top view and FIG. 1B is a side view. A box-type vacuum dryer 10 shown in the figure includes a sealed container 20 having an opening, two doors 30 for opening and closing the opening of the sealed container 20, and swinging the doors 30 from an open position to a closed position. The oscillating means (hinge mechanism 50) that supports the bed 24 is provided. Here, the “closed position” means a position where the door should be present with the door closed. The “open position” means the limit position where the door can swing when the door is opened. In general, the “open position” allows the material to be processed to be taken in and out smoothly from the opening. The position is appropriately set at a position where no door exists in front of the door opening.

  The swinging means of the box type vacuum dryer 10 shown in FIG. The hinge mechanism 50 swings between a container-side connecting portion 51 fixed to the outer surface of the side wall of the sealed container 20 by bolts (not shown), a door-side connecting portion 52 fixed to the side edge of the door 30 by welding. It is comprised with the pin 53 used as the center. The pin 53 is fixed to the door-side connecting portion 52, and the container-side connecting portion 51 supports the pin 53 so that it can swing. Accordingly, the side wall of the sealed container 20 is connected to the door 30 in a state where the door 30 can swing from the open position to the closed position by the hinge mechanism 50 of the swinging means.

  The hinge mechanism 50 of the swinging means shown in the figure has a stopper 54 (see FIG. 1 (a), not shown in FIG. 1 (b)) to restrict the door 30 from swinging beyond the open position. Is provided. The two doors 30 shown in the figure are both in the closed position, and the open position of the right door 30 (the door located in the lower side in FIG. 2A) of the two doors 30 is the same. This is indicated by an imaginary line in FIG.

  Further, the box-type vacuum dryer shown in the figure has a pressing mechanism (not shown) for pressing the closed door 20 against the closed container 30 in order to bring the closed container 20 and the door 30 into close contact with each other, and the atmosphere in the closed container 20. And a plurality of shelves 21 arranged in the hermetic container 20 for placing a tray (not shown) on which the material to be processed is placed. Each of the plurality of shelves 21 has a structure in which a heating heat medium (for example, hot water or steam) circulates therein, and the box-type vacuum dryer shown in the figure has a piping for supplying the heating heat medium to the shelves 21. 22 and a pipe 23 for discharging the heating heat medium circulated through the inside of the shelf 21.

The drying process using the box-type vacuum dryer having such a configuration can be performed by the following procedure, for example.
(1) After placing the tray on which the material to be processed is placed on the shelf 21 in a state where the door 30 is swung to the open position, the door 30 is swung back to the closed position.
(2) After the door 30 in the closed position is brought into close contact with the sealed container 20 by a pressing mechanism (not shown), the atmosphere in the sealed container 20 is exhausted by a pump (not shown) to reduce pressure or vacuum.
(3) In this state, the heating medium is circulated through the shelf 21, and the material to be treated is dried by indirectly heating the material to be treated by heat transfer / radiation.

  Box-type vacuum dryers that are dried in such a procedure are heated under vacuum, so that the moisture content can be kept extremely low despite low temperatures, and they dislike heat-sensitive materials and oxidation. Suitable for drying the material to be treated.

  Various proposals have heretofore been made with respect to box-type vacuum dryers. Patent Document 1 proposes that in a shelf-type box-type vacuum dryer, a plurality of shelves are combined with doors and supported from the floor, and the vacuum chamber is movable as a carriage structure. Thereby, if the vacuum tank of a cart structure is moved, a plurality of shelves can be taken out from the vacuum tank, and the maintainability of the box-type vacuum dryer can be improved.

JP 2004-150781 A

  As described above, a box-type vacuum dryer is used when the material to be treated is heated and dried under vacuum. In a conventional box-type vacuum dryer, there is a case where the door is swingably supported by swinging means of a hinge mechanism. In the swing means of the conventional hinge mechanism, in order to open and close the door, specifically, in order to swing the door in the closed position to the open position and swing the door in the open position to the closed position, a certain space is required. It is necessary to secure. In the box-type vacuum dryer shown in FIG. 1, since the door is opened and closed, no other equipment can be installed in a region within a distance L from the opening of the sealed container, and a distance L from the opening of the sealed container. It is necessary to secure space.

  However, when the box-type vacuum dryer is installed, the distance L may not be ensured due to various restrictions. For this reason, in the box-type vacuum dryer, it has been desired to reduce the space necessary for opening and closing the door.

  In Patent Document 1, no consideration is given to reducing the space required to open and close the door.

  This invention is made | formed in view of such a condition, and it aims at providing the box-type vacuum dryer which can reduce the space required for opening and closing of a door significantly.

  The gist of the present invention is as follows.

A closed container having an open mouth, said the door to open and close the opening of the sealed container, and swinging means for supporting the said door swingably, a box type vacuum dryer and a pump for exhausting the atmosphere of the sealed container The swinging means connects the arm for supporting the door, the outer surface of the side wall of the sealed container, and the arm so that the arm can swing about the vertical axis with respect to the sealed container. A hinge, a second hinge that connects the arm and the side edge of the door, and the door can swing about the vertical axis with respect to the arm; When the angle becomes a predetermined angle, the swing by the second hinge is restricted to maintain the door angle with respect to the arm at a predetermined angle, and the restriction is freely released , and the second hinge closes the position. Stopper that restricts the door of the door from swinging in the opening direction DOO have a, the second hinge, a box type vacuum dryer characterized in that it is connected to the side edge closer to the first hinge among the side edge of the door.

  In the box-type vacuum dryer of the present invention, since the swinging means has the arm, the first hinge, and the second hinge, the second hinge and the tip of the door (side edge not connected to the first hinge) The door can be swung while the distance is short. Thereby, the distance required for swinging and opening and closing the door can be greatly reduced. Further, since the swinging means has a lock mechanism, an operation for swinging and opening and closing the door can be easily performed.

It is the model which shows the conventional shelf type box type vacuum dryer, The figure (a) is a top view, The figure (b) is a side view. It is a top view which shows typically the structural example of the box-type vacuum dryer of this invention, The figure (a) is a state in which a door is in a closed position, The figure (b) is a locking mechanism when a door rock | fluctuates. Each shows the state in which it operates.

  Hereinafter, the box type vacuum dryer of the present invention will be described with reference to a configuration example shown in FIG.

  FIG. 2 is a top view schematically showing a configuration example of the box-type vacuum dryer of the present invention, in which FIG. 2 (a) shows a state where the door is in a closed position, and FIG. 2 (b) shows that the door swings. Each of these shows a state where the lock mechanism is in a position to operate. A box-type vacuum dryer 10 shown in the figure is obtained by changing the swinging means in the box-type vacuum dryer shown in FIG.

  The swinging means of the box-type vacuum dryer shown in the figure includes an L-shaped arm 70 for supporting the door and a first hinge that allows the arm 70 to swing about the vertical axis with respect to the sealed container 20. 60, the second hinge 80 that allows the door 30 to swing about the vertical axis with respect to the arm 70, and the swing of the second hinge 80 under a predetermined condition is regulated to make the angle of the door 30 relative to the arm 70 constant. And a lock mechanism that can freely release the restriction.

  The first hinge 60 shown in the figure is composed of a container side connecting portion 61 fixed to the side wall of the sealed container 20 by a bolt (not shown), a first pin 62, and an arm 70. The first pin 62 is fixed to the end of the arm 70, and the container side connecting portion 61 holds the first pin 62 so as to be able to swing in a state where its axis is vertical. Accordingly, the outer surface of the side wall of the sealed container 20 and the arm 70 are connected, and the arm 70 can swing around the vertical axis with respect to the sealed container 20.

  The second hinge 80 shown in the figure includes an arm 70, a second pin 82, and a door side connecting portion 81 fixed to the side edge of the door 30 by welding. The second pin 82 is fixed to the end of the arm 70 opposite to the first pin, and the door side connecting portion 81 is swingably disposed on the second pin 82. Thus, the side edges of the arm 70 and the door 30 are connected, and the door 30 can swing around the vertical axis with respect to the arm 70.

  Thus, the box-type vacuum dryer of the present invention supports the side edge of the door 30 via the arm 70 in a state where the swinging means can swing by the first hinge 60 and the second hinge 80.

  Here, in the box-type vacuum dryer of the present invention, the direction in which the door 30 in the closed position moves away from the opening without exceeding the opening of the sealed container 20 in the swing by the first hinge 60 or the second hinge 80 is “opening direction”. The direction in which the door 30 in the closed position moves away from the opening beyond the opening of the sealed container 20 is referred to as a “closing direction”. In FIG. 5A, the opening direction and the closing direction of the first hinge 60 are indicated by arrows arranged on both sides of the arm 70, and the opening direction and the closing direction of the second hinge 80 are indicated by arrows arranged on both sides of the door 30. . The arrow shown in the figure is hatched on the arrow indicating the opening direction and cross-hatched on the arrow indicating the closing direction.

  The lock mechanism of the swinging means shown in the figure includes an arm-side hole 91 provided on the surface of the arm 70 and a contact surface with the door-side connecting portion 81, and a surface of the door-side connecting portion 81 and the arm side. A door-side hole 92 disposed on the contact surface with 70, a locking pin (not shown) inserted into the arm-side hole 91 and held in a vertically movable state, and a pin (not shown). It is comprised with the lift mechanism (not shown) pushed up.

  Since the arm-side hole 91 and the door-side hole 92 have the same distance from the swing axis of the second hinge 80 (the axis of the second pin 82), the door 30 is connected to the arm 70 by the second hinge 80. When swinging in the closing direction, the positions of the arm side hole 91 axis and the door side hole 92 axis may coincide. At this time, a pin (not shown) held in the arm side hole 91 so as to be movable up and down falls, and the lower part of the pin exists in the door side hole 92 and the upper part of the pin exists in the arm side hole 91. It becomes a state. Thus, the second hinge 80 restricts the door 30 from swinging with respect to the arm, and the angle of the door 30 with respect to the arm 70 is the angle at which the axis of the arm side hole 91 and the axis of the door side hole 92 coincide. Maintained at.

  On the other hand, the release of the restriction by the lock mechanism is realized by pushing up a pin (not shown) dropped by a lift mechanism (not shown) to eject it from the door side hole 92 and positioning the pin only in the arm side hole 91. . As described above, the lock mechanism shown in the same figure restricts the swinging by the second hinge 80 when the door 30 is swung by the second hinge 80 and the door 30 is at a predetermined angle with respect to the arm 70. While maintaining the position of the door 30 with respect to the predetermined angle, the restriction can be freely released.

  Regarding the box-type vacuum dryer of the present invention that can adopt such a configuration example, an operation of swinging the door in the closed position to the open position and the operation of the swinging means at that time will be described.

  First, the door 30 in the closed position as shown in FIG. 5A is operated to move the door 30 to the side edge side supported by the swing mechanism while maintaining a state substantially parallel to the opening of the sealed container 20. . As a result, the arm 70 swings in the opening direction with respect to the sealed container 20 by the first hinge 60, and the door 30 swings in the closing direction with respect to the arm 70 by the second hinge 80. Eventually, the position of the axis of the arm side hole 91 coincides with the position of the axis of the door side hole 92 as in the right door 30 in FIG. The angle of the door 30 with respect to the arm 70 is restricted and maintained.

  Subsequently, when the door 30 is operated and the arm is swung in the opening direction with respect to the sealed container 20 by the first hinge 60, the door 30 whose rocking with respect to the arm 70 by the second hinge 80 is restricted accordingly. Swing. Eventually, the door 30 reaches the closed position like the right door 30 indicated by an imaginary line in FIG.

  In the box-type vacuum dryer of the present invention provided with the swinging means operating as described above, the swinging means has the arm 70, the first hinge 60, and the second hinge 80 described above. Accordingly, the arm 70 can be swung in the opening direction by the first hinge 60 and the door 30 can be swung in the closing direction by the second hinge 80 at the initial stage of swinging the door in the closed position to the open position. it can. Along with this, the distance between the swing center of the second hinge 80 and the tip of the door 30 (the side edge not connected to the first hinge) is shortened. As a result, the distance L required to swing the door in the closed position to the open position can be greatly reduced.

  Compared with the conventional box-type vacuum dryer shown in FIG. 1A, the box-type vacuum dryer of the present invention shown in FIG. 1B secures the door to swing from the closed position to the open position. The required distance L can be reduced by about 45%.

  In the box-type vacuum dryer of the present invention, the swinging means has the above-described lock mechanism. Thereby, the arm 70 is swung in the opening direction by the first hinge 60 and the door 30 is swung in the closing direction by the second hinge 80, and the distance between the second hinge 80 and the front end of the door 30 is shortened. Can be maintained. For this reason, the door 30 swings with respect to the arm 70 by the second hinge 80 during the subsequent door operation, that is, the door operation for swinging the arm 70 in the opening direction by the first hinge 60. There is nothing. Therefore, the box-type vacuum dryer of the present invention can easily perform an operation of swinging the door in the closed position to the open position, and can be opened and closed with one hand, for example.

  In the above description, the operation of swinging the door in the closed position to the open position and the operation at that time are described as examples. On the other hand, the operation of swinging the door in the open position to the closed position may be performed in the reverse order by swinging the door in the closed position to the open position. The operation is in the reverse order to the operation when the door is swung from the closed position to the open position.

  Specifically, the door 30 in the closed position such as the right door 30 indicated by an imaginary line in FIG. 5B is operated, and the arm 70 is swung in the closing direction with respect to the sealed container 20 by the first hinge 60. Accordingly, the door 30, which is restricted from swinging with respect to the arm 70 by the second hinge 80, also swings. Eventually, like the right door 30 shown in FIG. 4B, the door 30 and the opening of the sealed container 20 become substantially parallel.

  Subsequently, a lift mechanism (not shown) included in the lock mechanism is operated, and the restriction of the swing of the door 30 with respect to the arm 70 by the second hinge 80 is released. In this state, when the door 30 is operated to move to the side edge not connected to the second hinge 80, the arm 70 swings in the closing direction with respect to the sealed container 20 by the first hinge 60, and the second The door 30 swings in the opening direction with respect to the arm 70 by the hinge 80. Eventually, the door 30 reaches the closed position, and the state shown in FIG.

  Thus, even when the door in the open position swings to the closed position, the box-type vacuum dryer of the present invention swings because the swinging means includes the arm 70, the first hinge 60, and the second hinge 80. The distance L required for the operation can be greatly reduced. Further, since the swinging means has the lock mechanism, the operation of swinging the door in the closed position to the open position can be easily performed.

  In the box type vacuum dryer of the present invention, the lock mechanism is provided with the second hinge from the viewpoint of shortening the distance L required for opening and closing the door 30 by shortening the distance between the second hinge 80 and the tip of the door 30. It is preferable to make the angle for restricting the swinging by 80 as large as possible. However, it should be noted that there is a limit to increase the angle at which the lock mechanism restricts the swinging by the second hinge 80 due to interference between the arm 70 and the door 30 in the configuration example shown in FIG. There is a need.

  In the box-type vacuum dryer of the present invention, it is preferable that the swinging means further includes a second stopper 83 that restricts the second hinge 80 from swinging the door in the closed position in the opening direction. Thereby, it is possible to prevent an erroneous operation when opening and closing the door, and the operation becomes easier.

  In the box-type vacuum dryer of the present invention, it is preferable that the swinging means further includes a first stopper 63 that restricts the first hinge 60 from swinging the door 30 beyond the open position. Thereby, while being able to stop a door in an open position, it can prevent that the door 30 and the arm 70 collide with the side wall of the airtight container 20. FIG.

  According to the box-type vacuum dryer of the present invention, as described above, the distance required for swinging and opening the door can be greatly reduced, and the operation can be easily performed. Such a box-type vacuum dryer of the present invention can be effectively used for drying treatment of pharmaceuticals, foods, chemical industrial chemicals, electronic materials and the like.

10: Box-type vacuum dryer, 20: Airtight container, 21: Shelf,
22: piping for supplying the heating medium for heating, 23: piping for discharging the heating medium for heating,
24: Bed, 30: Door, 50: Hinge mechanism, 51: Container side connecting part,
52: Door side connecting part, 53: Pin of hinge mechanism, 54: Stopper of hinge mechanism,
60: 1st hinge, 61: Container side connection part, 62: 1st pin,
63: first stopper, 70: arm, 80: second hinge,
81: Door side connecting portion, 82: Second pin, 83: Second stopper,
91: Arm side hole, 92: Door side hole

Claims (1)

A box-type vacuum dryer comprising: a sealed container having an opening; a door that opens and closes the opening of the sealed container; a swinging means that supports the door in a swingable manner; and a pump that exhausts the atmosphere in the sealed container. There,
A first hinge that connects the arm for supporting the door, the outer surface of the side wall of the sealed container, and the arm so that the arm can swing about the vertical axis with respect to the sealed container; And a side edge of the door, the second hinge that enables the door to swing around the vertical axis with respect to the arm, and the second hinge swings the door in the closing direction so that the angle of the door with respect to the arm is predetermined. When the angle becomes the angle, the swing by the second hinge is restricted to maintain the door angle with respect to the arm at a predetermined angle, and the restriction is freely released, and the door at the closed position is opened by the second hinge. have a stopper and to limit the swings in the direction,
The box-type vacuum dryer , wherein the second hinge is connected to a side edge closer to the first hinge among the side edges of the door .

Images