KR200255684Y1 - Appliance for removing a manhole cover - Google Patents

Abstract

The present invention relates to a manhole cover opening and closing mechanism using the lever principle; One side is provided with a handle to be a force point and the other side is an elongated lever action rod is connected to the hook means that can be fitted into the hanger groove of the manhole cover as a working point; And lever support means connected from one point of the position biased to the force point of the action bar; According to such a configuration it is possible to easily open and close the manhole cover even by one worker can maximize the work efficiency of gas construction, water and sewage construction.

Description

Manhole cover opening mechanism {Appliance for removing a manhole cover}

The present invention relates to a lid opening mechanism, and more particularly to a manhole cover opening and closing mechanism using the lever principle.

Manholes installed on roads for the construction of electricity, gas and water lines are usually made of heavy-duty steel to withstand the loads of vehicles passing by. Workers open the manhole cover when they need to work on the track. In such a situation, the worker suffers from a considerable difficulty in opening and closing the manhole cover due to the heaviness of the manhole cover, and may cause a safety accident during transportation.

The opening and closing of the manhole cover is made by inserting a ring into a locking groove formed in the lid, and usually one or two people do this work. This decreases work efficiency and becomes an important factor for tired workers.

An object of the present invention for the above problems, to provide a mechanism that can easily open and close the heavy manhole cover with a small force. The detailed object of the present invention is to provide a manhole cover opening and closing mechanism that can be easily used in any place by making the production simple, easy transport and does not reduce workability, and does not use other power. In addition, in using the apparatus of the present invention, the safety of the worker should be protected as much as possible.

1 is a perspective view showing a state of use of the manhole cover opening and closing mechanism according to an embodiment of the present invention.

2 is a perspective view illustrating a connection structure of each connection unit.

3 is a perspective view showing the structure of the connecting ring directly connected to the manhole cover.

4A is a cross-sectional view taken along the direction A-A of FIG.

4B is a cross-sectional view taken along the direction B-B of FIG. 1.

5 is a perspective view of a hook of the ring means according to another embodiment of the present invention.

6 is a partial plan view for explaining the hook groove of the manhole cover to which the present invention is applied.

Explanation of symbols on the main parts of the drawings

One ; Manhole cover 2; Action bar

4 ; Pedestal 6; landlord

8 ; Hanger 10; chain

14; Hanger slot 18; Mounting rod release prevention member

20; hook

The above object, the handle is installed on one side of the force point and the other side is a long lever action rod is connected to the hook means that can be fitted into the hook groove of the manhole cover as a working point; It is achieved by a manhole cover opening and closing mechanism comprising a lever support means connected from one point of the position biased to the force point of the action bar.

The lever support means may be a support having one end connected in a direction perpendicular to one point of the working rod, and a rod-shaped pedestal connected to the other end of the support such that the support is perpendicular to the support and the working rod.

The pedestal has a circular rod shape and a friction material such as urethane or rubber is applied to the outer circumference so as not to slip from the bottom of the work place.

In addition, the ring means and the action bar may be connected by a flexible tension member such as a chain or rope to facilitate the operation.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 is a perspective view showing a state of use of the manhole cover opening and closing mechanism according to an embodiment of the present invention. 2 is a coupling diagram illustrating a connection structure of each connection unit. 3 is a perspective view showing the structure of the connecting ring directly connected to the manhole cover. 4 is a view showing the coupling method of the manhole cover and the connecting ring, Figure 4a is a cross-sectional view taken along the A-A direction of Figure 1, Figure 4b is a cross-sectional view taken along the B-B direction of FIG.

The lever action bar (2, hereinafter referred to as the action bar) may be a unitary body, but as shown in FIG. 1, it may be a connecting body in which two or more unit members 2a and 2b are composed of one set. The connection method may be a known method for assembling so as not to fall out arbitrarily when used. According to the present embodiment, a method including a ball inserted into a male and female and elastically supported at a side contact portion and a groove in which the ball is seated is used. This type is shown in FIG. 2 and this coupling scheme may be employed for other coupling portions described later.

One end of the lever action bar becomes the force point FP, and a handle 2b 'for preventing slipping may be installed. The other side is provided with a connecting means for connecting with the manhole cover as the working point WP. There is a supporting point (SP) at one point oriented to the working point of the action bar, and according to the present embodiment is composed of the base (4) and the support (6). The position of the supporting point and the length of the working rod are matters that can be set or changed by the operator in consideration of the use environment and other various matters.

According to the present invention, the support 6 is used to fix the support point to a certain height for the convenience of work or to broaden the maneuvering range of the force point. The strut 6 and the rod 2 are detachably connected. The pedestal 4 is connected to the support 6 so as to be perpendicular to the action bar 2. Their connection method may be the method shown in FIG.

The pedestal 4 is rod-shaped and has a means on the outer periphery to prevent the pedestal from slipping off the ground. An anti-slip member 4a such as urethane or rubber may be covered on the periphery of the pedestal.

Such a lever-type mechanism has a feature that can be easily moved and used, and allows the manhole cover to be opened or closed while retreating the position of the pedestal back little by little.

Referring to the connection structure of the manhole cover (1) and the action bar (2) as follows.

On both sides of the manhole cover is provided with a hook groove (1a, see Fig. 6) for fitting a ring for lifting him. The hook tool 8 illustrated as an example of the hook means can be fitted into the hook groove above and connected to the working rod by a flexible rigid material such as a chain 10, a rope or a belt. 3 is a perspective view of the hanger 8, which has a characteristic structure for applying to the shape of the hook groove 1a of the manhole cover currently provided.

Hereinafter, a description will be given with reference to FIGS. 3 to 4A and b. The hook hole 8 is connected to the chain link ring 12, the chain link ring to be connected to the chain and the like, the hook groove hook rod 14, which is formed integrally with the extension portion 14a at the tip, hanger hook It is composed of a hook rod detachment prevention member 18 that is fitted to the outer circumference of the hook groove hook rod so as to move in the longitudinal direction and the circumferential direction of the rod and is elastically supported downward by the spring 16. The bar bar release preventing member is for preventing the bar bar from being arbitrarily rotated and disengaged in a state where the bar bar is fitted into the hanger groove of the manhole cover, and includes two thin rods extending downward from both sides of the disc 18a and its bottom surface ( 18b).

After the worker inserts the hook groove hook rod 14 and the hook rod detachment preventing member 18 into the hook groove of the manhole cover in the state shown in FIG. 2, the hook groove hook rod 14 is rotated 90 °. 6 is a partial plan view of the manhole cover, in particular for explaining the shape of the hook groove.

Hanger groove (1a) has a double structure, the inlet (1a ') is long and narrow is formed below the wide seat (1a').

The extension portion 14a of the hook groove hook rod 14 is fitted in the wide seat 1a 'of the hook groove, and the hook rod release preventing member 18 is elastically positioned at the inlet 1a' of the hook groove. It is supported so that the hook groove rod does not break through the entrance.

According to another embodiment of the present invention, the hook and the like described in the chain is provided with a hook 20 for use other than the opening and closing of the manhole cover. This hook is shown in FIGS. 1 and 5. Usage of the hook 20 will be seen by looking at the shape shown. That is, the hook can be used to open and close the manhole cover of a different type as described above, such as the manhole for water and sewage.

Since the matters described above are only some embodiments of the present invention, those skilled in the art will be able to make various changes within the scope not exceeding the scope of the technical idea of the present invention from the disclosed contents.

For example, the shape of the pedestal, the action bar or the connection method of each part may be used by replacing the various methods provided previously.

In particular, the hinge and connecting the pedestal and the action bar to be rotated to each other, the pedestal itself may be triangulated to be fixed to the ground.

In addition, the ring means coupled to the manhole cover according to the type of the manhole cover may be changed as necessary other than the two types described above. This document is merely illustrative and illustrative of the means of linking such functions.

According to the above configuration, it is possible to easily open and close a variety of heavy manhole cover even by the worker alone. This reduces the fatigue of the operator and gives the effect of increasing the working speed. In addition, according to the manhole cover opening and closing mechanism according to the present invention, there is no burden of use as it is easy to store and move as a prefabricated type that can separate each part.

Claims (4)

One side is provided with a handle that is a force point and the other side is an elongated lever action bar (2) is connected to the hook means that can be fitted into the hook groove of the manhole cover as a working point; Manhole cover opening and closing mechanism comprising a lever supporting means connected from one point of the position biased to the force point of the action bar. 2. The support according to claim 1, wherein the lever support means comprises: a support (6) whose one end is connected at right angles from one point of the working rod; The manhole cover, which is connected to the other end of the support so as to be perpendicular to the support and the working rod, is formed in a rod shape and a pedestal 4 to which an anti-slip member such as urethane or rubber is applied to its outer peripheral surface. Switchgear. The method of claim 1, wherein the connection between the action bar and the manhole cover uses a flexible tension member such as a chain or a rope, in particular the ring means that is fitted into the hook groove of the manhole cover, A rod-shaped hook groove hook rod 14 in which the extension portion 14a is integrally molded at the front end; The manhole is characterized in that it comprises a hook rod departure prevention member 18 that is fitted to the outer circumference of the hook groove hook rod so as to move in the longitudinal and circumferential direction of the hook groove hook rod and is elastically supported downward by the spring 16. Lid opening mechanism. The manhole cover opening and closing mechanism according to claim 1, wherein the ring means is provided in two or more types so as to be selectively used according to the type of the manhole cover.