JP3548598B2 - Iron lid opening and closing device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an iron lid opening and closing device used for opening and closing a manhole iron lid, an iron lid for color paving, and the like.
[0002]
[Prior art]
As a tool for opening and closing an iron cover such as a manhole iron cover and a color paving iron cover, there is a simple opening and closing handle having a substantially T-shape. The opening / closing handle is provided with a hook portion and a male screw portion at a lower end, and the hook portion is engaged with a handle of a manhole iron cover, or the male screw portion is formed on a color paving iron cover. It is connected to the iron cover by screwing it into a female screw hole for use as a handle when opening and closing.
[0003]
[Problems to be solved by the invention]
However, in such an opening / closing handle, the opening / closing and movement of the iron cover must be performed by a worker's direct strength, but iron covers such as manhole iron covers and color paving iron covers are, for example, large-sized. Since it is formed to be robust enough to withstand the load of a truck or the like, it has a considerable weight, and it is not easy for an operator to open and close and move the iron cover alone. Furthermore, if the earth and sand accumulated in the gap between the iron lid and its receiving frame are solidified, or if the packing provided on one side is bonded to the other, it must be trimmed. Actually, it is extremely difficult to open the lid with only a simple force.
An object of the present invention is to provide an iron lid opening / closing device capable of solving such a conventional problem.
[0004]
[Means for Solving the Problems]
According to the present invention, there is provided a support rod which is formed along the longitudinal direction with a long hole-like insertion hole opened in the vertical direction, and a support rod which is inserted across the iron cover, inserted through the insertion hole from above, and has a screw near the upper end. A connecting rod having a screw nut on the left and right sides which is supported by the supporting rod so as to be vertically movable by the combined nut, and whose lower end is detachably connected to the iron lid ; And a handlebar fixed to the center of the support rod at right angles to the support rod.
[0005]
In this configuration, as means for detachably connecting the lower end of the screw rod to the iron cover, a hook portion engageable with a handle formed on the iron cover may be formed at the lower end of the screw rod. A configuration in which a male screw portion that can be screwed into a female screw hole formed in an iron lid is formed at the lower end of the screw rod can be applied. Further, an idler wheel may be provided at the support end of the handlebar.
[0006]
[Action]
First, the connecting rod is straddled across the iron cover, and the lower ends of the screw rods provided on the left and right sides of the support rod are connected to the iron cover. When the nut is rotated in a predetermined direction in this state, the screw rod rises, and the iron lid connected to the lower end of the screw rod is cut off and pulled up. Next, by lifting the rear end of the handle rod with the support end as a fulcrum, the iron lid is lifted with a small force by the leverage principle, and in this state, the iron rod is horizontally rotated around the support end. The lid can be moved. To close the opened iron lid, the procedure may be reversed.
[0007]
【Example】
A first embodiment of the present invention will be described with reference to FIGS. This embodiment shows an iron lid opening / closing device configured to open / close a manhole iron lid.
As shown in FIG. 5, a pair of handle holes 3 are provided at both left and right positions on the manhole iron cover 2 a attached to the receiving frame 1, and a rod-shaped handle 4 is provided in each handle hole 3. It is suspended.
[0008]
Reference numeral 5 denotes a connecting rod constituting the iron lid opening / closing device according to the present invention. The connecting rod 5 includes a supporting rod 6 and screw rods 7, 7 disposed on both left and right sides thereof. The support rod 6 is formed to have a length that can be extended across an iron cover such as a manhole iron cover 2a or an iron cover 2b for color paving described later, and a pair of legs 8 provided at both ends in the longitudinal direction. , 8 at an appropriate height. Further, the support rod 6 is formed with a long hole-shaped insertion hole 9 opened in the vertical direction along the longitudinal direction.
[0009]
The screw rods 7, 7 are inserted from above into the through holes 9 of the support rod 6, and are supported by the support rod 6 via washers 11, 11 to be vertically movable by nuts 10, 10 screwed into the vicinity of the upper end. At the same time, it is provided movably in the insertion hole 9 along its longitudinal direction. At the lower end of each of the screw rods 7,7, a hook portion 12 which can be engaged with the handle 4 of the manhole iron cover 2a is formed. 7 is detachably connected to the manhole iron cover 2a.
[0010]
On the other hand, a handlebar 13 is fixed to the center of the support rod 6 perpendicularly to the support rod 6. That is, a mounting plate 14 is fixed to the lower surface of the handle rod 13 at a position slightly closer to the front end from the center, and the mounting plate 14 is applied to the upper end surface of the support rod 6 and a bracket is attached to the lower end surface of the support rod 6. The handle rod 13 is mounted by clamping the bracket 15 and the mounting plate 14 to the support rod 6 with bolts 16a and nuts 16b. The distal end of the handlebar 13 serves as a support end 17 at the time of opening and closing operations. The support end 17 is provided with two idle wheels 18 composed of left and right wheels. A handle 19 is provided at the rear end of the handlebar 13, and a support leg 20 for holding a standing posture is projected downward between the handle 19 and the mounting plate 14.
[0011]
The use method and operation of the iron lid opening / closing device having such a configuration will be described.
First, the support rod 6 and the handle 4 of the manhole iron cover 2a are aligned, and the connecting rod 5 is inserted across the manhole iron cover 2a, and is disposed on both left and right sides of the support rod 6 as shown in FIG. The hook portions 12 at the lower ends of the screw rods 7 are respectively engaged with the handles 4 of the manhole iron cover 2a, and the nuts 10 are tightened and fixed. When the nut 10 is further rotated in a predetermined direction with a tool such as a wrench in this state, the screw rod 7 rises by a relative screwing action, and the manhole iron cover 2a connected to the lower end of the screw rod 7 receives the receiving frame 1. It is cut off from and raised.
[0012]
Next, by lifting the rear end of the handle rod 13 with the idler wheel 18 as a fulcrum, the manhole iron cover 2a is lifted up with a small force based on the principle of leverage. The manhole iron cover 2a can be moved to the side of the receiving frame 1 by rotating the. At this time, since the idling wheels 18 are two left and right wheels, the home position can be easily rotated. In addition, the idle wheel 18 can be used as a wheel and transported to a desired position while the opened manhole iron cover 2a is hung as it is. On the other hand, in order to close the manhole iron cover 2a thus opened, the procedure may be reversed.
[0013]
FIG. 6 shows, as a second embodiment of the present invention, an iron lid opening / closing device configured to open and close an iron lid for a color pavement.
The color pavement iron cover 2b is formed by filling a pavement finishing material into a rectangular frame made of cast iron, and has female screw holes 21 for opening and closing operations at both left and right positions.
[0014]
On the other hand, in this embodiment, the screw rods 7 arranged on both left and right sides of the support rod 6 are formed in a bolt shape having a rotation operation part 22 at the upper end, and the screw rod 7 is screwed into the female screw hole 21 at the lower end. A matable male screw portion 23 is formed. Above the male screw portion 23, a flange 24 for stopper is provided around. The screw rod 7 is inserted from above into the insertion hole 9 of the support rod 6 as in the first embodiment, and can be moved up and down on the support rod 6 via a washer 11 by a nut 10 screwed to a portion near the upper end. Supported by
[0015]
In such a configuration, the male screw portion 23 of each screw rod 7 is screwed into the female screw hole 21 of the color paving iron cover 2b via the turning operation of the turning operation portion 22, and the flange edge 24 is set to the female screw. When pressed against the upper edge of the hole 21, the screw rod 7 is fixed. Next, when the nut 10 is rotated in a predetermined direction with a tool such as a spanner, the screw rod 7 is raised by a relative screwing action, and the collar paving iron lid 2b connected to the lower end of the screw rod 7 is received by the frame. It can be cut off from one and pulled up. Other configurations, usage methods, and operations are the same as those of the first embodiment.
[0016]
In the embodiment, the configuration has been described in which the idler wheel 18 for facilitating transportation is provided at the support end 17 at the tip of the handle rod 13, but the handle rod 13 can be rotated about the support end 17 as a fulcrum. If the iron cover can be moved, the idler wheel 18 is not always necessary.
[0017]
【The invention's effect】
According to the present invention, as described above, the connecting rod 5 is formed by the supporting rod 6 that is extended across the iron lid and the screw rod 7 that is supported by the supporting rod 6 and has a lower end detachably connected to the iron lid. The iron cover opening / closing device is constructed by fixing the handle rod 13 having the support end 17 at the tip thereof perpendicularly to the support rod 6 and in the center thereof, so that the screw rod 7 can easily cut off the iron cover. In addition, the handle lever 13 that applies the leverage principle has an excellent effect that the operator can easily open and close and move the heavy iron lid alone.
[0018]
In addition, if the idler wheel 18 is provided at the support end 17 of the handle rod 13, the transportation can be easily performed.
[Brief description of the drawings]
FIG. 1 is a plan view of a first embodiment of an iron lid opening and closing device according to the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is a front view of a portion where a handle rod is attached to a support rod.
FIG. 4 is a front view of an idler wheel portion.
FIG. 5 is a front view showing a connection state of a screw rod and an iron cover.
FIG. 6 is a front view showing a connection state of a screw rod and an iron cover according to a second embodiment.
[Explanation of symbols]
2a, 2b Iron lid 4 Handle 5 Linking rod 6 Support rod 7 Screw rod 9 Insertion hole 10 Nut 12 Hook part 13 Handle rod 17 Support end 18 Idler wheel 21 Female screw hole 23 Male screw part

Claims (3)

A vertically elongated elongated hole-shaped insertion hole is formed along the longitudinal direction, and a support rod that extends across the iron cover and a nut that is inserted into the insertion hole from above and screwed into the vicinity of the upper end. A connecting rod body that is supported by the supporting rod so as to be able to move up and down, and has screw rods on both left and right sides whose lower ends are detachably connected to the iron lid;
An iron lid opening / closing device, comprising: an idler wheel serving as a support end at a front end, and a handlebar fixed to a center of the support rod at right angles to the support rod. 2. The iron lid opening / closing device according to claim 1, wherein a hook portion engageable with a handle formed on the iron lid is formed at a lower end of the screw rod. The iron lid opening / closing device according to claim 1, wherein a male screw portion engageable with a female screw hole formed in the iron lid is formed at a lower end of the screw rod.

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