JPH07268891A - Switchgear for iron cover - Google Patents

Abstract

PURPOSE:To open and close an iron cover such as a manhole iron cover, an iron cover for color paving, etc., easily. CONSTITUTION:A linking lever body 5 is composed of a bearing lever 6 crossed over and stretched across an iron cover and a screw lever 7, which is bone by the bearing lever 6 and in which a lower end is connected detachably to the iron cover, and a handle lever 13 having a bearing end 17 at a front end is crossed at right angles with the bearing lever 6 and fixed at the central section of the bearing lever 6. Accordingly, the connection of the iron cover can be cut easily by the screw lever 7, and the heavy iron cover can be opened and closed and moved easily by one operator by the handle lever 13, to which the principle of a lever is applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron lid opening / closing device used for opening and closing a manhole iron lid, an iron lid for color paving, and the like.

[0002]

2. Description of the Related Art As a tool for opening and closing an iron lid such as a manhole iron lid or a colored paving iron lid, there is a simple T-shaped opening / closing handle. Such an opening / closing handle has a hook portion or a male screw portion at the lower end, and the hook portion is engaged with a handle of a manhole iron lid, or the male screw portion is opened / closed on a color paving iron lid. It is used as a handle when opening and closing by connecting to an iron lid by screwing it into a female screw hole for use.

[0003]

However, in such an opening / closing handle, the iron lid must be opened / closed and moved by the direct physical force of the worker. However, the manhole iron lid or the colored paving iron is used. Since the iron lid such as the lid is formed to be strong enough to withstand the load of, for example, a large truck, it has a considerable weight, and it is not possible for an operator to open and close the iron lid and move the iron lid. It's not easy. Furthermore, if the soil and sand accumulated in the gap between the iron lid and its receiving frame is solidified, or if the packing provided on one side is adhered to the other, it is necessary to cut the edges, so it is necessary for the person to directly cut the edges. The actual situation is that it is extremely difficult to open the lid with only the desired force. An object of the present invention is to provide an iron lid opening / closing device that can solve the above-mentioned conventional problems.

[0004]

SUMMARY OF THE INVENTION According to the present invention, an elongated hole-like insertion hole that opens in the up-down direction is formed along the longitudinal direction, and a support rod that is extended across an iron lid is provided above the insertion hole. A connecting rod body that is inserted through from the above, is supported by the supporting rod so as to be vertically movable by a nut screwed in the vicinity of the upper end, and has a lower end and left and right screw rods that are detachably connected to the iron lid, A support rod is provided at the tip, and the handle rod is fixed to the center of the support rod so as to be orthogonal to the support rod.

Further, in this structure, as means for detachably connecting the lower end of the screw rod to the iron lid, a hook portion formed on the iron lid and engageable with a handle is attached to the lower end of the screw rod. A configuration may be applied in which a male screw portion that can be formed or screwed into a female screw hole formed in the iron lid is formed at the lower end of the screw rod. Further, an idler wheel may be arranged at the supporting end of the handle rod.

[0006]

First, the connecting rods are passed over the iron lid, and the lower ends of the screw rods arranged on both the left and right sides of the support rod are connected to the iron lid. When the nut is rotated in a predetermined direction in this state, the screw rod is raised, and the iron lid connected to the lower end of the screw rod is trimmed and pulled up. Next, by lifting the rear end of the handle rod with the supporting end as a fulcrum, the iron lid is lifted with a small force by the principle of leverage, and in this state, the handle rod is horizontally rotated about the supporting end to make the iron The lid can be moved. Further, in order to close the opened iron lid, the procedure reverse to the above may be performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 and close a manhole iron lid. As shown in FIG. 5, the manhole iron cover 2a attached to the receiving frame 1 includes
A pair of handle holes 3 is provided at both left and right positions, and each handle hole 3
The rod-shaped handles 4 are horizontally installed inside.

Reference numeral 5 denotes a connecting rod which constitutes the iron lid opening / closing device according to the present invention. The connecting rod 5 is composed of a support rod 6 and screw rods 7, 7 arranged on the left and right sides thereof. The support rod 6 is formed to have a length such that it can be passed over an iron lid such as a manhole iron lid 2a or an iron lid 2b for color paving to be described later, and a pair of leg portions 8 provided at both ends in the longitudinal direction thereof. , 8 are held at appropriate height positions. Further, the support rod 6 is formed with an elongated hole-like insertion hole 9 opened in the vertical direction along the longitudinal direction thereof.

The screw rods 7 and 7 have an insertion hole 9 for the support rod 6.
Nut 1 that is inserted into the upper part from above and screwed into the vicinity of the upper end
It is supported by 0, 10 on the support rod 6 via washers 11, 11 so as to be vertically movable, and is provided so as to be movable in the insertion hole 9 along its longitudinal direction. A hook portion 12 engageable with the handle 4 of the manhole iron lid 2a is formed at a lower end of each screw rod 7, 7, and by engaging the hook portion 12 with the handle 4, each screw rod 7, 7 is detachably connected to the manhole iron cover 2a.

On the other hand, a handle rod 13 is fixed to the central portion of the support rod 6 so as to be orthogonal 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 tip from the central portion thereof, the mounting plate 14 is applied to the upper end surface of the support rod 6, and a bracket 15 is attached to the lower end surface of the support rod 6. Apply, bolt 16a and nut 1
The handle rod 13 is attached by sandwiching the bracket 15 and the mounting plate 14 on the support rod 6 by 6b. The tip of the handle rod 13 has a supporting end 17 at the time of opening / closing operation.
Therefore, the support end 17 has an idle wheel 18 composed of two left and right wheels.
Is provided. Further, a handle portion 19 is provided at the rear end of the handle rod 13, and a supporting leg 20 for maintaining a standing posture is provided between the handle portion 19 and the mounting plate 14 so as to project downward.

The method of use and the 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 lid 2a are aligned with each other, and the connecting rod 5 is passed across the manhole iron lid 2a, and is arranged on both left and right sides of the support rod 6 as shown in FIG. The hooks 12 at the lower end of the screw rod 7 thus engaged are engaged with the handles 4 of the manhole iron lid 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 due to the relative screwing action, and the manhole iron lid 2a connected to the lower end of the screw rod 7 receives the receiving frame 1 It is cut from the edge and pulled up.

Next, by lifting the rear end of the handle rod 13 using the idler wheel 18 as a fulcrum, the manhole iron lid 2a is lifted by a small force by the principle of leverage, and in this state, the idler wheel 18 is centered. By rotating the handle rod 13 in the horizontal direction, the manhole iron lid 2a can be moved to the side of the receiving frame 1. At this time, since the idle wheels 18 are the left and right wheels, it is easy to rotate the fixed position. In addition, the idle wheel 18 can be used as a wheel and can be transported to a desired position while the opened manhole iron cover 2a is suspended. On the other hand, in order to close the manhole iron cover 2a thus opened, the procedure reverse to the above may be performed.

FIG. 6 shows, as a second embodiment of the present invention, an iron lid opening / closing device configured to open / close an iron lid for color paving. The color paving iron lid 2b is configured by filling a cast iron rectangular frame with a paving finish material,
Female screw holes 21 for opening and closing are provided at both left and right positions.

On the other hand, in this embodiment, the screw rods 7 arranged on both the left and right sides of the support rod 6 are provided with a rotating operation portion 22 at the upper end.
And a male screw portion 23 which can be screwed into the female screw hole 21 is formed at the lower end thereof. Also,
A collar 24 for a stopper is provided above the male screw portion 23. The screw rod 7 has the same structure as in the first embodiment.
It is inserted into the insertion hole 9 of the support rod 6 from above, and is supported by the nut 10 screwed on the vicinity of the upper end of the support rod 6 via the washer 11 so as to be vertically movable.

In such a construction, the male screw portion 23 of each screw rod 7 is screwed into the female screw hole 21 of the iron pawl 2b for color paving through the turning operation of the turning operation portion 22, and the brim 24 is formed. Is pressed against the upper edge of the female screw 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 lifted by a relative screwing action, and the iron pawl 2 for color paving connected to the lower end of the screw rod 7 is used.
The b can be cut off from the receiving frame 1 and pulled up. The other structure, method of use, and operation are similar to those of the first embodiment.

In the embodiment, the structure in which the idle wheel 18 for facilitating the transportation is arranged at the support end 17 at the tip of the handle rod 13 has been described, but the handle rod 13 is rotated around the support end 17 as a fulcrum. Since the iron lid can be moved by moving it, the idler wheel 18 is not always necessary as long as this is the case.

[0017]

As described above, according to the present invention, the support rod 6 which is extended across the iron lid, and the screw rod 7 which is supported by the support rod 6 and whose lower end is detachably connected to the iron lid are provided. And a handle rod 1 having a support end 17 at its tip.
Since the iron lid opening / closing device is constructed by fixing 3 at right angles to the supporting rod 6 and fixing it at the center thereof, the edge of the iron lid can be easily cut by the screw rod 7, and the lever principle is applied. The handle rod 13 has an excellent effect that even a single operator can easily open and close and move the heavy iron lid.

Further, by disposing the idle wheel 18 on the supporting end 17 of the handle rod 13, the transportation can be easily carried out.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of an iron lid opening / closing device according to the present invention.

FIG. 2 is a side view of the above.

FIG. 3 is a front view of a mounting portion of a handle rod with respect to a support rod.

FIG. 4 is a front view of an idler wheel portion.

FIG. 5 is a front view showing a connected state of a screw rod and an iron lid.

FIG. 6 is a front view showing a connected state of the screw rod and the iron lid of the second embodiment.

[Explanation of symbols]

 2a, 2b Iron lid 4 Handle 5 Connecting rod 6 Support rod 7 Screw rod 9 Insertion hole 10 Nut 12 Hook portion 13 Handle rod 17 Support end 18 Freewheel 21 Female screw hole 23 Male screw portion

Claims (4)

[Claims] 1. A vertically extending elongated hole-shaped insertion hole is formed along the longitudinal direction, and a support rod that is passed over an iron lid and is inserted from above into the insertion hole and is provided in the vicinity of the upper end. A connecting rod body that is vertically movably supported by the supporting rod by a screwed nut and that has a lower end and screw rods on both left and right sides that are detachably connected to an iron lid, and a supporting end at the tip. An iron lid opening / closing device, characterized in that it is constituted by a handle rod that is orthogonal to the support rod and is fixed to the central portion thereof. 2. The iron lid opening / closing device according to claim 1, wherein a hook portion formed on the iron lid and engageable with a handle is formed at a lower end of the screw rod. 3. The iron lid opening / closing device according to claim 1, wherein a male screw portion that can be screwed into a female screw hole formed in the iron lid is formed at a lower end of the screw rod. 4. The iron lid opening / closing device according to claim 1, wherein an idler wheel is arranged at a support end of the handle rod.