JPH0932923A - Cover detaching device for vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly detach a cover without any twist during operation for the detachment thereof from a vessel, regarding a pressure resisting vessel or the like. SOLUTION: A thread A is formed on the external surface of a cover 2 for a vessel 1, and an annular body 4 to be screwed to the thread N is provided. Furthermore, constitution is so made that the cover 2 is detached from an opening on the operation of a screw feed mechanism to rotate the annual body 4. According to this construction, a whole cover area is axially displaced by the same extent, and the cover 2 can be easily detached without any twist.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for separating a cover (a lid, a closed body, etc.) of a container such as a pressure-resistant container from a joint surface at an opening of the container.

[0002]

2. Description of the Related Art Conventionally, in this type of pressure-resistant container, the flame escapes due to a planar joint or a cylindrical joint between the opening and the cover, or a combination of the planar joint and the cylindrical joint. It has a structure that prevents the occurrence of pressure, and is designed to maintain flameproof performance. For example, FIG.
As shown in FIG. 1, the cover 1 is attached to the opening 11H of the container 11.
2 is attached and detached, the container 11 is provided with a flange portion 11F that forms a planar joint to form a planar joint surface, and the joint surface of the cover 12 is joined thereto. .

Further, the cover 12 is formed with a cylindrical portion projecting inward of the container, and the inner peripheral surface of the container 11 is also joined in a cylindrical shape. And the cover 12 for the container 11
Are fixed on the surface, and a plurality of fixing bolts 13 are screwed in at equal intervals and fixed. In such a configuration, when the inside of the container is evacuated, the cover 12 is brought into close contact with the container 11 by the joint surface. Further, even if there is no pressure difference between the inside and the outside of the container 11, in order to prevent flame escape, the fit between the convex portion diameter of the cover 12 and the inner diameter of the container 11 is generally tight.

In the above container 11, when the cover 12 is detached (separated), the container 11 and the cover 12 are firmly adhered to each other, and therefore cannot be manually operated. Therefore, normally, the fixing bolt 1 is attached to the cover 12 as illustrated.
Not only the holes for No. 3 but also a plurality of holes 14 for removal are formed at equal intervals. It should be noted that no hole is provided at the joint surface position of the container 11 with respect to each of the waste holes 14. Then, a detachment bolt (not shown) is provided in the detachment hole 14 for detachment.
The cover 12 is disengaged by screwing in each.

[0005]

However, in the detaching operation as described above, the entire surface of the cover 12 needs to be simultaneously and uniformly separated. That is, if the cover 12 becomes uneven (uneven), the cover 12 is twisted and it becomes more difficult to remove it. Therefore, it is necessary to rotate each detaching bolt by the same amount to perform the separation, which requires skill and time.

The present invention provides a container cover removing device that solves such problems.

[0007]

A cover removing device for a container according to the present invention comprises a cover formed with a screw on the outer periphery thereof, and an annular body screwed with the screw is provided. The cover is detached from the opening by the feeding mechanism. With this configuration, the screw feed mechanism displaces the entire circumference of the cover in the axial direction by the same amount, so that the cover is not twisted.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 and FIG. 2 show an embodiment in which the cover removing device for a container according to the present invention is applied to a pressure resistant container as in FIGS. In FIG. 1, reference numeral 1 is a pressure-resistant container, and a cover (lid) 2 is attached to and detached from an opening 1H of the container. A surface is formed, and the joint surface of the cover 2 is joined to this.
Further, the cover 2 is formed with a cylindrical portion projecting inward of the container, so that the inner peripheral surface of the container 1 is also joined in a cylindrical shape. Then, the cover 2 is surface-mounted on the container 1, and a plurality of fixing bolts 3 are screwed into the container 1 at equal intervals to fix them. The above configuration is the same as the conventional one.

In the present invention, the screw N is formed on the outer periphery of the cover 2 and the annular body 4 screwed onto the screw N is provided. The inner peripheral surface of the annular body 4 is also formed with a screw that is screwed into the screw on the outer periphery of the cover 2, and is a kind of nut.

Therefore, when the annular body 4 is rotated, the annular body 4 approaches and abuts the flange portion 1F of the container 1 due to the screw feeding mechanism. When the annular body 4 is still rotated, the annular body 4 rotates while being joined to the container 1, and thereafter the cover 2 is displaced in the opposite direction due to the screw feed mechanism,
The container 1 is separated from the joint surface. In this case, screw N
The entire circumference of the cover is displaced by the same amount in the axial direction due to the screwing relationship of, and the cover is detached. Therefore, the cover 2 is not twisted. This point is basically different from the disengagement method that employs a cam mechanism consisting of a cam groove and a cam follower.

The features of the present invention are as described above and shown in the illustrated examples, but are not limited to the contents of the above and illustrated examples, and include various modifications. For example, in order to facilitate the rotation of the annular body 4, a handle may be attached to the outside of the annular body 4. Regarding the shape of the cover 2, for example, a conical portion protruding inward of the container may be formed, and in this case, the conical inner peripheral surface of the container 1 can be easily joined. Furthermore, it is also possible to insert a thin thrust bearing between the flange surface 1F of the container 1 and the annular body 4 so as to make the rotation of the annular body 4 easier. As another method of interposing this thrust bearing, the thrust bearing may be integrally formed on the joint surface side of the annular body 4 with the flange surface 1F. Further, as a method of smoothly performing sliding contact with the flange surface 1F of the annular body 4 without interposing a thrust bearing or the like, the flange surface 1 of the annular body 4 is provided.
The surface to be joined with F may be subjected to a surface treatment with a small frictional resistance, such as Teflon processing. Furthermore cover 2
When the size (height in the axial direction) is large due to the container, it is not necessary to make the size (the length in the axial direction = thickness) of the annular body 4 the same as the size of the cover 2. Ring 4
It is also possible to reduce the size and weight of the cover 2 by making it half or less of the height of the cover 2. When the annular body 4 is rotatably fixed to the container 1, the cover 2 can be attached to and detached from the joint surface of the container 1 by adjusting the rotation direction.

As described above, the present invention is characterized in that it employs a screw mechanism which is easy to machine and can be easily removed completely and uniformly around the periphery, and includes various modified embodiments making use of this.

The present invention is summarized as follows.

Appendix 1 A device for detaching a cover for opening and closing an opening of a container, wherein a screw is formed on the outer periphery of the cover and an annular body screwed with the screw is provided, and the annular body is attached to the container. A cover removing device for a container, characterized in that the cover is removed from the opening by a screw feeding mechanism.

Appendix 2 A device for removing a cover for opening and closing an opening of a container, wherein a screw is formed on the outer periphery of the cover and an annular body is provided to be screwed into the screw, and the annular body is provided with the opening. A cover removing device for a container, characterized in that the cover is removed from the opening by a screw feeding mechanism while rotating the container while being joined to the joining surface.

Appendix 3 A device for removing a cover that opens and closes an opening of a container, wherein a screw is formed on the outer periphery of the cover, and an annular body that is screwed into the screw, and the cover and the annular body. A cover removing device for a container, characterized in that a thrust bearing inserted between them is provided, and the annular body is rotated to separate the cover from the opening by a screw feeding mechanism.

[0017]

Since the present invention is as described above, when the annular body is rotated, the cover is displaced in the direction away from the container due to the screw feed mechanism of the annular body and the cover, and the joint surface of the container is removed. Easily detached. Moreover, because the entire circumference of the cover is displaced in the axial direction by the same amount due to the screwing relationship of the screws, the entire cover is not twisted, the structure is simple, and the container can be detached very easily. To provide a cover removing device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a container cover removing device according to the present invention.

FIG. 2 is a side view of a container cover removing device according to the present invention.

FIG. 3 is a diagram showing a conventional configuration according to the present invention.

FIG. 4 is a diagram showing a conventional configuration according to the present invention.

[Explanation of symbols]

 1 ... Container 2 ... Cover 3 ... Fixing bolt 4 ... Annular body N ... Screw

Claims (1)

[Claims] 1. A device for removing a cover that opens and closes an opening of a container, wherein a screw is formed on an outer periphery of the cover and an annular body that is screwed into the screw is provided, and the annular body is attached to the container. A cover removing device for a container, characterized in that the cover is removed from the opening by a screw feeding mechanism.