JPH0244753Y2 - - Google Patents

Description

[Detailed explanation of the invention] a. Purpose of the invention (industrial application field) The vertical steam sterilizer to which the lid device according to this invention is assembled will not be contaminated with bacteria in various laboratories, hospitals, etc. Used to sterilize clothing, various medical instruments, etc.

(Prior Art) In hospitals and various research institutes, clothes, medical instruments, and the like contaminated with bacteria are sterilized using high-temperature steam. For this reason,
Conventionally, various steam sterilizers have been provided. Among these, relatively small vertical steam sterilizers are used as steam sterilizers installed in places where the amount of items to be sterilized is not large, such as small-scale hospitals, research institutes, and medical practitioners. There is. The vertical steam sterilizer has a casing 1 as schematically shown in FIGS.
A cylindrical sterilization container 2 with a bottom is housed in the casing 1, and a lid 3 is provided which can freely open and close the upper end of the sterilization container 2, which opens on the upper surface of the casing 1. This lid body 3 is designed to fully open the upper end opening of the sterilization container 2 when taking out and taking out objects to be sterilized, and to airtightly close this opening during sterilization work. It is attached to the middle part of an arm 5 which is horizontally rotatable about a vertical shaft 4 so as to be movable up and down.

To further explain the lid device for opening and closing the lid body, the vertical shaft 4 provided at the upper corner of the casing 1
The arm body 5 has one end supported on the shaft 4 and is rotatable in the horizontal direction around the vertical shaft 4. A vertical screw hole is formed in the middle part of the arm body 5, and a screw rod 6 is screwed into this screw hole. I am making it match. A handle 7 for rotating the screw rod 6 is fixed to the upper end of the screw rod 6 that protrudes above the arm body 5, and a handle 7 for rotating the screw rod 6 is fixed to the lower end of the screw rod 6 that protrudes below the arm body 5. is the lid 3
However, it is mounted so that it can freely rotate around this threaded rod 6. On the other hand, at a corner of the upper surface of the casing 1 located on the opposite side from the vertical shaft 4, a restrainer 8 is fixed to which the end of the arm body 5 can be freely engaged and detached. This restraint 8
, which engages the end of the arm body 5 opposite to the vertical shaft 4 and prevents this end from separating from the top surface of the casing 1. The holding part 10 is bent from the upper end of the part 9 in the direction of the vertical axis 4, forming an inverted L-shape. In an actual case, as shown in FIG.
When entering the lower side of 0, it is possible to enter from one direction to a predetermined depth.

When the upper end opening of the sterilization container 2 is to be hermetically closed, the end of the arm 5 is moved below the restraining part 10 of the restraining tool 8 by rotating the arm 5 in the horizontal direction. In this state, the lid body 3 is located directly above the sterilization container 2, so rotate the handle 7 and tighten the screw rod 6.
is lowered, and the lower surface of the periphery of the lid 3 supported on the lower end of the screw rod 6 is pressed against the opening edge of the sterilization container 2. Since packing is attached to the lower surface of the periphery of the lid 3, the opening of the sterilized container 2 can be kept airtight by this pressing operation.

To open the opening of the sterilized container 2, rotate the handle 7 in the opposite direction to the above case to raise the screw rod 6, move the lower surface of the lid 3 away from the opening edge of the sterilized container 2, and then open the arm 5. Rotate around the vertical shaft 4,
Remove the lid 3 from the opening of the sterile container 2.

(Problems to be Solved by the Invention) However, in the conventional vertical steam sterilizer constructed and used as described above, the following disadvantages have conventionally occurred.

That is, when the handle 7 is rotated while the sterilization container 2 is filled with high-temperature, high-pressure water vapor and the pressing force on the lid 3 is relaxed, the water vapor flows between the lower surface of the periphery of the lid 3 and the opening of the sterilization container 2. The arm body 5 is rotated with the high pressure and high temperature water vapor still remaining inside the sterilization container 2, which is released into the surroundings from between the edges and the lid 3, and the lid body 3 is moved to the upper end of the sterilization container 2. If the opening is moved in the direction of opening, there is a risk that the residual water vapor in the sterilization container 2 will blow out upwards and cause burns to the hands, face, etc. of the operator.

The lid device for a vertical steam sterilizer of the present invention solves the above-mentioned disadvantages.

b. Structure of the invention (means for solving the problem) The lid device for the vertical steam sterilizer of the invention is similar to the conventional vertical steam sterilizer, in which high temperature is stored in a bottomed cylindrical sterilization container with an open top. This is a lid device for opening and closing the upper end opening of a sterilization container of a vertical steam sterilizer that can freely feed high-pressure steam, and has one end attached to the opening side of the sterilization container by a vertical shaft on the top surface of a casing housing the sterilization container. A lid that can freely close the upper end opening of the sterilization container is attached to the middle part of the pivoted arm so that it can move up and down with respect to the arm, and the lid is attached to the upper surface of the casing opposite to the vertical shaft and the upper end opening of the sterilization container. An inverted L-shaped restrainer having a restraining portion for restraining the upper surface of the other end of the arm body is fixed at the position.

A feature of the lid device of the present invention is that when the lid is closed, the upper surfaces of the end portions of the arm bodies facing each other and the lower surface of the restraining member of the restraining device can engage freely in a concave and convex manner.

(Function) The lid device for the vertical steam sterilizer of the present invention configured as described above is operated in the same manner as the conventional lid device described above, and opens and closes the upper end opening of the sterilization container, but the lid device inside the sterilization container If water vapor remains in the tank, the pressure of this water vapor pushes the lid upward, and also pushes the arm connected to the lid through the screw rod upward. One end of this arm body is supported by a vertical shaft, but since the arm body can swing slightly in the vertical direction due to the play of this vertical shaft, the upper surface of the other end of the arm body and the restraint member The lower surface of the part makes strong contact. When the lid is closed, the two surfaces engage in a convex-concave manner, and as a result of the strong contact between the two surfaces, it becomes impossible to move the arm in the horizontal direction, making it impossible to open the lid. When the pressure inside the sterilization container decreases and the contact pressure between the two surfaces decreases, the lid can be opened by moving the arm horizontally while disengaging the concave and convex engagement.

(Example) Next, the present invention will be explained in more detail by explaining the illustrated embodiment.

FIG. 1 shows a first embodiment of the invention. Holding part 1 of holding tool 8 fixed to the top surface of casing 1
A concave portion 12 is formed on the lower surface of the arm body 5, and a convex portion 13 that fits into the concave portion 12 is formed on the upper surface of the end of the arm body 5 that faces the concave portion 12 when the lid body 3 is moved to the closed state. ing. When the concave portion 12 and the convex portion 13 are fitted, the lower surface of the end of the arm body 5 and the casing 1
The height of the rising portion 9 (FIG. 6) of the restrainer 8 is determined so that a gap 14 having a height greater than the height of the convex portion 13 is formed between the upper surface of the retainer 8 and the upper surface of the retainer 8.

Since the retainer 8 and the arm body 5 are formed as described above, the arm body 5 can be freely inserted and removed from the lower side of the retainer part 10 of the retainer 8 when opening and closing the lid body 3 (FIGS. 4 and 5). , the lid body 3 can be opened and closed in the same way as in the case of the conventional device, but if water vapor remains inside the sterilization container 2, the arm body 5 is strongly pushed upward, resulting in the concave portion 12 and the convex portion. The arm body 5 is strongly fitted with the part 13.
It becomes difficult to move the lid body 3 laterally.
This prevents you from opening it carelessly. The concave portion 12 and the convex portion 13 have the same effect even if the surfaces on which they are formed are reversed.

Next, FIG. 2 shows a second embodiment of the present invention. In the case of this embodiment, the recess 12 formed on the lower surface of the restraining part 10 of the restraining tool 8 is an inclined recess that gradually becomes deeper toward the back wall 11, and the end of the arm body 5 that enters the lower side of the restraining part 10 The upper surface is an inclined surface that comes into close contact with this recess 12. In the case of this embodiment, the handle 7 (FIGS. 4 and 5) at the upper end of the screw rod is rotated while the end of the arm body 5 is incompletely inserted under the restraining part 10, and the lid body 3 is sterilized. When pressed against the container 2, the recess 12 and the upper surface of the end of the arm body 5 slide, and the arm body 5 automatically enters completely below the restraining part 10.

Furthermore, in the third embodiment shown in FIG.
A micro switch 15 is fixed to the back wall 11 of the restrainer 8, and unless the micro switch 15 detects that the end of the arm 5 has completely entered the lower side of the restrainer 10, water vapor will not flow into the sterilization container 2. It prevents sending. It is the same in all the embodiments that the lid 3 cannot be opened while pressure steam remains in the sterilization container 2.

c. Effects of the invention Since the lid device of the vertical steam sterilizer of the invention is configured and operates as described above, it is possible to prevent the lid from being opened by mistake while high-temperature steam remains in the sterilization container. This eliminates the risk of burns to workers.

[Brief explanation of the drawing]

Figures 1 to 3 are views corresponding to the enlarged A-A cross section of Figure 5 showing the first to third embodiments of the present invention, Figure 4 is a schematic vertical sectional view of a vertical steam sterilizer, and Figure 5 is The same plan view,
FIG. 6 is an enlarged perspective view of section B in FIG. 4. 1: Casing, 2: Sterile container, 3: Lid,
4: Vertical shaft, 5: Arm body, 6: Screw rod, 7: Handle, 8: Holder, 9: Rising part, 10: Holding part,
11: back wall, 12: recess, 13: protrusion, 14: gap, 15: micro switch.

Claims (1)

[Scope of utility model registration request] A lid device that opens and closes the top opening of a sterilization container of a vertical steam sterilizer that allows high-temperature, high-pressure steam to be freely sent into a bottomed cylindrical sterilization container that is open at the top, and is a lid device that opens and closes the upper end of the sterilization container of a sterilization container. A lid body that can freely close the upper end opening of the sterilization container is attached to the middle part of the arm body, one end of which is pivoted by a vertical shaft to the opening side of the sterilization container on the top surface, so that it can be raised and lowered from the arm body, and the lid body is attached to the upper surface of the casing. At a position opposite to the vertical shaft and the upper end opening of the sterilization container, an inverted L-shaped restrainer having a restraining part for restraining the upper surface of the other end of the arm body is fixed, and the arms face each other when the lid body is closed. A lid device for a vertical steam sterilizer, in which the upper surface of the end of the body and the lower surface of the retainer of the retainer are freely engageable in a concave and convex manner.