KR19990007874U - Manhole Cover Switch - Google Patents

Abstract

The manhole cover switch of the present invention has a simple configuration, and therefore, is easy to manufacture and can reduce production costs, and can be easily operated. The manhole cover switch is extended to have a predetermined length, the first extension tube having a hook portion bent at a predetermined angle at one end, the support portion to which the first extension tube is inserted and fixed and supported, and the first extension tube is coupled And a second extension tube extending to have a length. The support part includes a connection pipe and a tightening lever inserted into the connection pipe, wherein the connection pipe is supported by a support shaft penetrating the lower portion of the connection pipe, and support wheels are provided at both ends of the support shaft. A first insertion hole penetrating from the front to the rear is formed in the center portion of the connection pipe, and the first extension pipe penetrates the first insertion hole and is inserted into the second extension pipe, and is then firmly fixed by a tightening lever.

Description

Manhole Cover Switch

The present invention has a simple configuration, and thus relates to a manhole cover switch that is easy to manufacture and reduces manufacturing costs, and can be easily operated.

Generally, manhole covers used on roads and on the ground, not in vehicles or tanks, are used for road construction materials used to protect underground drainage, underground conduits, and other facilities and to allow access to the facilities. Is one of. Manhole covers as such road construction materials are usually very heavy.

Korean Patent Publication No. 93-19945, Utility Model Publication No. 97-1947, and Utility Model Publication No. 97-13851 disclose some manhole cover opening and closing devices for easily opening and closing such heavy manhole cover.

However, in such devices, an expensive and complicated separate member such as a hydraulic jack is required (Patent No. 93-19945), or the overall configuration of the device is complicated, and the operation of the device is difficult due to the need to operate by turning the handle. There are disadvantages such as time-consuming (utility model publication No. 97-1947 and utility model publication No. 97-13851).

In addition, in order to open and close the manhole cover without using the above devices, a sharp part such as the tip of a pickaxe must be inserted into the opening of the cover and the cover is opened and closed, in which case it is difficult to lift the manhole cover. If the tip of the blade slips away from the opening and closing process in the lifting process, there is a problem that the worker may be injured.

The present invention is devised to solve the conventional problems as described above, the object of the present invention is to provide a simple configuration, and thus easy to manufacture and reduce the manufacturing cost, the manhole cover switch that can be easily operated To provide.

1 is an exploded perspective view of a manhole cover switch according to the present invention,

Figure 2 is a perspective view showing a coupling state of the manhole cover switch shown in Figure 1,

3 is a view showing a state in which the manhole cover is opened and closed.

Explanation of symbols for the main parts of the drawings

100 manhole cover switch 110 first extension pipe

112 hook portion 114 first coupling hole

120: support portion 123: support wheel

124: first insertion hole 126: tightening lever

130: second extension pipe 140: coupling pin

In order to achieve the object of the present invention as described above, the present invention,

A first extension tube extending to have a predetermined length and having a hook portion bent at a predetermined angle at one end thereof;

A support part to which the first extension pipe is inserted and fixedly supported;

And a second extension tube coupled to the first extension tube and extending to have a predetermined length, and when the second extension tube is pressed after the hook portion of the first extension tube is inserted into the manhole cover, The manhole cover switch is provided by opening the manhole cover by rotating the first extension pipe and the second extension pipe.

Preferably, the support portion includes a connecting tube and a tightening lever inserted into the connecting tube, wherein the connecting tube has an upright cylindrical shape, and the connecting tube is supported by a support shaft passing through the lower portion of the connecting tube. It is supported, and support wheels are provided at both ends of the support shaft. The first insertion hole penetrates from the front surface to the rear surface of the connection tube, and a second insertion hole extending in the longitudinal direction is formed in the second extension tube, and the first extension tube penetrates the first insertion hole. It is inserted into the second insertion hole.

A female screw portion is formed on an upper inner surface of the connection pipe, and the tightening lever includes a body portion and a first handle penetrating the upper portion of the body portion, and a male screw portion coupled to the female screw portion of the connection pipe is provided below the body portion. And tightening the tightening lever after tightening the male screw part to the female screw part so that the male screw part of the tightening lever travels along the female screw part so that the tightening lever firmly fixes the first extension pipe.

On the other hand, the manhole cover switch is further provided with a coupling pin, a first coupling hole is formed on one side of the other end of the first extension tube, a plurality of agents arranged at predetermined intervals in the longitudinal direction at one end of the second extension tube A second coupling hole is formed, the rear end of the first extension tube is inserted into the second insertion hole of the second extension tube, and the first coupling hole and the one of the second coupling holes are aligned so as to be in a straight line; The first extension tube and the second extension tube are coupled by inserting a pin through one of the second coupling holes and the first coupling hole in order.

In the manhole cover switch according to the present invention, by the operation of the hook portion, the support wheels, and the first and second extension pipe, the manhole cover can be easily opened and closed using the principle of a simple lever.

Hereinafter, with reference to the accompanying drawings will be described a manhole cover switch according to an embodiment of the present invention.

1 is an exploded perspective view of a manhole cover switch according to the present invention.

Referring to Figure 1, the manhole cover opening and closing 100 according to the present invention is a first extension pipe 110 having a predetermined length and angle, the support portion 120 is inserted and fixed support and the first extension pipe 110, and the first It is coupled to the first extension pipe 110 and includes a second extension pipe 130 having a predetermined length.

One end of the first extension pipe 110 is formed with a hook 112 bent at a predetermined angle. The other end of the first extension pipe 110 is formed with a plurality of first coupling holes 114 arranged at predetermined intervals in the longitudinal direction.

The support part 120 is provided with the connection pipe 121 and the tightening lever 126 inserted into the connection pipe 121. The connection pipe 121 has an upright cylindrical shape, and the support shaft 122 penetrates through the lower portion of the connection pipe 121 to support the connection pipe 121. Support wheels 123 are provided at both ends of the support shaft 122. The first insertion hole 124 penetrating from the front to the back is formed in the center portion of the connection pipe 121. And the female screw part 129 is formed in the upper inner surface of the connection pipe 121.

The tightening lever 126 has a body portion 125 and a first handle 128 that passes through the upper portion of the body portion 125 or is attached to both sides. The lower portion of the body portion 125 is a male screw portion 127 is fastened to the female screw portion 129 is formed.

A second insertion hole 136 extending in the longitudinal direction is formed in the second extension tube 130, and a second coupling hole 134 is formed at one end thereof. The second handle 132 is formed at the other end of the second extension tube 130.

On the other hand, the manhole cover opener 100 is further provided with a coupling pin 140, the first extension pipe 110 penetrates the first insertion hole 124, the second insertion hole 136 of the second extension pipe 130 After being inserted into the coupling pin 140, the coupling pin 140 is inserted through the second coupling hole 134 and the first coupling hole 114 in order.

Figure 2 is a perspective view showing a coupling state of the manhole cover switch shown in FIG.

Referring to FIG. 2, the first extension pipe 110 is coupled to penetrate the first insertion hole 124 of the support 120. Then, when the male screw portion 127 of the tightening lever 126 is fastened to the female screw portion 129, and then the tightening lever 126 is turned to tighten, the male screw portion 127 of the tightening lever 126 is the female screw portion 129. Proceed along) to hold firmly the first extension pipe (110). At this time, by adjusting the position where the first extension pipe 110 is tightened by the tightening lever 126, the relative position between the hook portion 112 and the support portion 120 can be adjusted.

After being combined as described above, the rear end of the first extension pipe 110 is inserted into the second insertion hole 136 of the second extension pipe 130. Next, after aligning one of the plurality of first coupling holes 114 to the second coupling hole 134, the coupling pins 140 are coupled to each other. At this time, by appropriately selecting any one of the plurality of first coupling holes 114, the length of the first extension pipe 110, and furthermore, the length of the manhole cover switch 100 can be adjusted.

3 is a view showing a state in which the manhole cover is opened and closed. Hereinafter, with reference to Figure 3 describes the state of use of the manhole cover switch 100 according to the present invention.

First, the hook portion 112 having a predetermined angle is fitted into the opening and closing hole H formed on one side of a manhole cover M which is generally used. When the hook portion 112 is fitted, the manhole cover switch 100 rises by a predetermined angle from the ground, as indicated by the solid line in FIG. 3, and the support wheel 123 of the support portion 120 is separated from the ground. Done.

At this time, the worker lowers the second handle 132 formed at the end of the second extension pipe 132 in the direction of the arrow shown in FIG. As such, when the second extension pipe 132 is lowered, as shown by the broken line in FIG. 3, the support wheel 123 of the support part 120 is brought into close contact with the ground, and the support wheel 123 serves as a support point and is easily provided with a manhole cover M. ). Afterwards, the manhole cover M can be easily moved to a desired position by the rolling motion of the support wheel 123 by pushing or dragging the second handle 132.

When the manhole cover M is covered again on the manhole, the operation can be easily and quickly performed by operating in the same manner as the above-described process.

In the manhole cover switch according to the embodiment of the present invention as described above, by the operation of the hook portion 112, the support wheel 123, and the first and second extension pipes (110, 130), Using the principle, the manhole cover can be opened and closed easily.

Therefore, the present invention has a simple configuration, and therefore, it is easy to manufacture and reduce manufacturing costs, and provides a manhole cover switch that can be easily operated.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the present invention without departing from the spirit and scope of the present invention described in the utility model claims I can understand that you can.

Claims (5)

A first extension tube extending to have a predetermined length and having a hook portion bent at a predetermined angle at one end thereof; A support part to which the first extension pipe is inserted and fixedly supported; And And a second extension tube coupled to the first extension tube and extending to have a predetermined length, and when the second extension tube is pressed after the hook portion of the first extension tube is inserted into the manhole cover, The manhole cover switch, characterized in that the manhole cover is opened by rotating the first extension pipe and the second extension pipe. The support shaft according to claim 1, wherein the support portion includes a connecting tube and a tightening lever inserted into the connecting tube, wherein the connecting tube has an upright cylindrical shape, and the connecting tube passes through a lower portion of the connecting tube. The manhole cover switch is supported by, characterized in that the support wheel is provided on both ends of the support shaft. The method of claim 2, wherein the central portion of the connection tube is formed with a first insertion hole penetrating from the front to the back, the second extension tube is formed with a second insertion hole extending in the longitudinal direction, the first extension tube is the first extension tube 1 through the insertion hole is a manhole cover switch, characterized in that inserted into the second insertion hole. According to claim 3, wherein the upper inner surface of the connecting tube is formed with a female thread, the tightening lever has a first handle that passes through the body portion and the upper end of the body portion, the lower portion of the body portion of the female screw of the connection tube A male screw portion is formed to be engaged with the portion, and after tightening the tightening lever after tightening the male screw portion to the female screw portion, the male screw portion of the tightening lever travels along the female screw portion so that the tightening lever firmly fixes the first extension pipe. Manhole cover switch characterized in that the fixing. According to claim 3, The manhole cover is further provided with a coupling pin, the other end of the first extension pipe is formed with a plurality of first coupling holes arranged at predetermined intervals in the longitudinal direction, the second extension pipe A second coupling hole is formed at one end, and the rear end of the first extension tube is inserted into the second insertion hole of the second extension tube, and one of the first coupling holes and the second coupling hole are aligned so as to be in a straight line. And the first extension pipe and the second extension pipe are coupled to each other by sequentially inserting the coupling pin into one of the second coupling hole and the first coupling hole.