JPH0516382Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a door opening/closing mechanism that enables automatic opening and closing of a freeze-drying apparatus.

[Conventional technology]

Freeze-drying equipment that removes moisture from chemicals and various raw materials by freezing is widely used.

The device has a sturdy structure consisting of a box body surrounded by an insulating wall on the outside, and the heavy door can be opened and closed to load and unload chemicals and various raw materials into and out of the shelves provided inside. It's getting old.

[Problem that the invention attempts to solve]

In the above-mentioned conventional freeze-drying apparatus, clamping and opening/closing of the door were manually performed in order to take the trays of objects to be processed into and out of the shelves.

This kind of work cannot be done while holding the tray, so either the tray must be set aside, or two or more people are required. Furthermore, if the inside of the apparatus main body, shelves, and objects to be processed are pre-frozen, the time the door is open must be minimized to minimize the temperature rise therein. (Usually, open the door and put the tray in the shelf.
The task of closing the door is often repeated several times. ) The worker carrying the tray often has both hands full, and many of the items to be processed in the tray are expensive, so he must be careful not to spill these sensitive items from the tray. Opening the door is quite hard work.

The present invention automatically opens and closes the door, allowing the workpiece to be placed into the device in a short time without requiring extra effort from the operator.
The purpose of this invention is to provide a door opening/closing mechanism for a freeze drying device.

[Means and actions for solving problems]

According to the present invention, by pressing a switch installed on the floor with your foot, the air cylinder is energized to move the piston forward, and the shaft driven by the piston moves the lock arm on the main body side to the pin on the door side. Ascend from above and unlock the door,
By configuring the door to be opened by further advancing the shaft using the piston, the door can be opened automatically without using hands.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

In the drawing, 1 is a freeze-drying apparatus body surrounded by a wall 2 having a heat insulating wall 3 attached to the outside, and 4 is a door at the front of the apparatus.

At the front end of the main body 1, a portion of the heat insulating wall is removed, and the shaft 5 is moved forward and backward by a bearing 6 provided on the lateral extension 2a of the outer wall 2 and a bearing 7 provided on the front end of the heat insulating wall 3. is swingably supported.

In order to drive the shaft 5 back and forth, a cylinder 8 operated by air is attached to the outside of the heat insulating wall 3, and its piston 9 is connected to the shaft 5 by an arm 10. The shaft 5 projects slightly forward from the bearing 6 when inactive, and its rear end protrudes into the heat insulating wall 3. A bracket 11 having a lock arm 13 pivotally attached to it by a pin 12 is attached to the front surface of the lateral extension 2a immediately above the shaft 5. The lock arm 13 has a recess 1 on the lower side.
3a, and a pin 13b is attached to the lower rear end.

A bracket 14 is attached to the side surface of the door 4 and has a pin 14a on the upper side and a protrusion 14b on the lower side. The protrusion 14b is located at a position directly facing the shaft 5.

When the door 4 is closed, the lock arm 13 locks the door 4 by engaging the pin 14a in its recess 13a from above, and the pin 13b extends between the protrusion 14b of the bracket 14 and the shaft 5.

Although not shown, a foot switch is provided near the freeze-drying device at a position where it does not interfere with the operation.

When an operator places a tray into a shelf within the apparatus, he or she first operates the foot switch. Then, the cylinder 8 is energized, the piston 9 moves forward due to the air, and the shaft 5 also moves forward, and the pin 13
By pressing b and raising it from the solid line position to the dotted line position, the lock arm 13 is released from the pin 14a and the door is unlocked, and then by further moving forward, the shaft 5 moves the protrusion 14b of the bracket 14 with the pin 13b placed thereon. Push to open door 4. Therefore, the operator can place the tray held in his hand into the shelf in the main body 1 as is.

On the other hand, after the cylinder 8 has moved forward by a predetermined stroke, it is returned to its original position by the action of a limit switch (not shown) attached to the side of the cylinder 8. Although the lock arm 13 rotates downward, it is held by a stopper (not shown) so that it does not fall below a horizontal position.

After placing the tray in the equipment shelf, the operator:
Since both hands are open, the door can be closed easily. At that time, the lock arm 13 is attached to the pin 1 of the door.
4a, the door is automatically pushed up and then falls down again, and the recess 13a engages the pin 14a, locking the door.

Similarly to the above, when taking out the tray after the freeze-drying process of the processed material, the door can be opened without using hands.

[Effect of idea]

With the structure described above, no human power is required to open the door of the freeze-drying device, and therefore the door can be opened easily and quickly, and there is no need to pay extra attention to the objects to be processed in the tray. The work of opening the door and placing trays into the shelves within the device can be done more easily, safely and quickly than before with fewer people. Furthermore, since the time during which the door is open and the overall working time can be significantly shortened, the temperature rise inside the apparatus and the objects to be processed can be suppressed to a low level.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a partially sectional plan view, and FIG. 3 is a side view. 1... Freeze drying device, 2... Outer wall, 2a...
Lateral extension (of the outer wall), 3...insulated wall, 4...door,
5... Shaft, 6, 7... Bearing, 8... Air cylinder, 9... Piston, 10... Arm, 11
... Bracket, 12 ... Pin, 13 ... Lock arm, 13a ... Recess, 13b ... Pin, 14
...Bracket, 14a...pin, 14b...protrusion.

Claims (1)

[Scope of utility model registration request] A foot switch installed on the floor, an air cylinder installed on the side of the device body that is energized by the operation of the foot switch, and an air cylinder that is pivoted on the front of the device and is driven by the piston of the air cylinder when the air cylinder is activated. A lock arm that is pushed up by a shaft to unlock the door,
A bracket that is provided on the side of the door and has a pin that works together with the lock arm to lock the door, and a bracket that is pressed by the shaft and works together to open the door when the door is unlocked. A door opening/closing mechanism for a freeze-drying device featuring: