JPS6143716Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a lid body that is attached to the opening of a container body so as to be openable and closable, and is particularly designed to be easily attached and detached by remote control such as a robot. The present invention relates to a locking mechanism for the lid.

PRIOR ART

Conventionally, as a method for attaching a lid to a container, a flange surface is formed at the opening of the container body, screw holes or bolt holes are bored in this flange surface, and the lid body is attached to the flange surface of the container body. It is fixed using bolts and nuts.

On the other hand, as a special case, the flange of the container body has a bolt support shaft on the opposite surface to the surface on which the lid is attached, and a swing bolt is rotatably attached to this bolt support shaft, and the swing bolt is attached to the outer periphery of the flange. A notch is formed for the bolt, and when installing the lid, the swing bolt end faces the lid mounting surface of the flange, engages the lid, and secures with a nut. It is widely available to the public.

[Problem that the invention attempts to solve]

However, with any method of attaching the lid using any of the above techniques, a large number of bolts and nuts are required for one lid, and these bolts and nuts are separate parts that can be removed from the container body or the lid. It is.

For this reason, when using remote control using a robot, if you fail to grasp a bolt or nut and drop it during the operation, you may not be able to pick it up easily, or there may be a negative impact on other functions. Ta.

In order to solve these problems, the present invention uses bolts for fixing the lid, such as lock bolts, which are screwed into the lid body, and only one lock bolt is used for each lid body. Therefore, the purpose of this invention is to provide a locking mechanism for a lid body that is easy to attach and detach and has a structure that prevents the lock bolt from falling.

[Means for solving problems]

This invention has the following configuration to achieve the above object.

That is, the locking mechanism of the lid body according to this invention forms a stepped part on the inner surface of the lid attachment part provided at the opening of the container body, into which the disc-shaped lid body fits; Two or more notches on the circumferential surface,
An engagement groove is formed in succession on the left or right side of this notch, and a lock bolt is rotatably screwed onto the upper part of the lid body that is fitted into the lid mounting part, and the lock bolt is connected to the outside of the lid body. A lock arm having a larger diameter is rotatably screwed together, and rotation of the lock bolt engages the lock arm in the engagement groove to lock the lid.

[Effect]

Since the lid locking mechanism according to the present invention is constructed as described above, when the lid is attached to the container body and the lid body is fitted into the lid attachment portion of the container body, the locking bolt begins to rotate.

Next, when the lock bolt begins to rotate, the lock arm screwed into the lock bolt rotates in the same direction as the lock bolt due to the frictional resistance created by the materials of the threaded portions.

As described above, the lock arm rotated by slight frictional resistance enters the engagement groove formed on the inner surface of the container body.

When the lock arm enters the engagement groove, the lock arm stops rotating, and when the lock bolt is further rotated, it moves in the engagement groove in a direction away from the lid body and stops when it comes into contact with the upper surface of the engagement groove. Than this,
When the lock bolt is further rotated, the reaction force of the stationary lock arm acts on the lock bolt,
The lid body is pressed against the stepped portion of the container body, and the lid attachment work is completed.

When removing the lid from the container body, if you continue to rotate the lock bolt in the opposite direction to the above-mentioned installation work, the frictional resistance between the lock bolt and the lock arm that are screwed together will act in the opposite direction, and the lock arm will slide out of the engagement groove into the container body. Rotate and move to the notch of
The lid can now be removed.

〔Example〕

Hereinafter, one embodiment of this invention will be described in detail with reference to the accompanying drawings.

1 and 2, reference numeral 1 denotes a cylindrical lid attachment part provided at the opening of the container body, and the inner surface of this part includes the outer peripheral edge of a disc-shaped lid body 3 constituting the lid body 2. A stepped portion 1a into which is fitted is formed.

A lock bolt 5 is rotatably attached to the lid body 2 via a bracket 4 fixed to the center of a disc-shaped lid body 3, and the lock bolt 5 has a diameter larger than the outer diameter of the lid body 3. lock arm 6
are constructed by screwing together.

Therefore, by rotating the lock bolt 5 of the lid body 2 in the forward and reverse directions, the lock arm 6 is attached to the lid body 3.
It has a structure that allows it to move up and down within a predetermined range. Further, a protection part 7 having a flange 7a for protecting the lock bolt 5 and lifting the lid body 2 is fixed to the upper part of the lock arm 6.

On the other hand, a notch 1b into which the lock arm 6 is inserted is formed on the upper inner circumferential surface of the stepped portion 1a of the lid attachment portion 1 provided at the opening of the container at an opposing position passing through the center point. There is. An engagement groove 1c is formed adjacent to the notch 1b and engaged when the lock arm 6 is rotated to the left or right.

Further, a reinforcing ring 8 is fixed to the upper outer peripheral portion of the lid attachment portion 1 where the cutout portion 1b and the engagement groove 1c are formed.

Furthermore, the lid body 3 of the lid body 2 attached to the lid attachment part 1 of the container body is provided with a spigot 3a, and is configured to be sealed by interposing seal members 9a, 9b such as elastic bodies. There is.

FIGS. 3A and 3B are perspective views of lock arms 10 and 20 showing other embodiments of this invention,
In accordance with the number of legs 10a and 20a of the lock arms 10 and 20, the same number of notches and engagement grooves are provided in the lid attachment part 1 of the container body.

[Effect of idea]

As explained in detail above, the locking mechanism of the lid body according to this invention uses only one fixing bolt and has a structure that prevents it from falling from the lid body, so it is easy to operate and can be operated remotely by a robot. Can be opened, closed and locked safely and securely. In addition, since a link is fixed to the outer periphery of the notch in the container body with which the lock arm of the lid is engaged, the notch can be provided at two or more locations as appropriate. By increasing the number of notches and legs of the lock arm, the reaction force acting on the lock arm when fixing the lid can be dispersed, so the material strength of the lock arm can be increased by the increased number of legs. This has practical effects such as reducing the weight of the lock arm.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of this invention, Fig. 2 is a perspective view showing the state in which the lid of Fig. 1 is removed, and Fig. 3 A and B show another embodiment of this invention. It is a perspective view of the important part shown. 1...Lid attachment part, 1a...Stepped part, 1b...
Notch portion, 1c...Engagement groove, 2...Lid body, 3...
Lid body, 3a... pilot, 4... bracket,
5... Lock bolt, 6... Lock arm, 8...
…ring.

Claims (1)

[Scope of utility model registration request] A stepped part into which the disc-shaped lid body fits is formed on the inner surface of the lid attachment part provided at the opening of the container body, and two or more notches are formed on the upper inner circumferential surface of the stepped part, An engagement groove is formed in succession on the left or right side of this notch, and a lock bolt is rotatably screwed onto the upper part of the lid body that is fitted into the lid mounting part, and the lock bolt is connected to the outside of the lid body. A locking mechanism for a lid body, characterized in that a lock arm having a diameter larger than the diameter of the lid body is rotatably screwed together, and when the lock bolt rotates, the lock arm can be engaged with the engagement groove to lock the lid body. .