JP3187817U - Manhole cover opening and closing device with drop prevention receptacle - Google Patents

Abstract

Provided is a manhole cover opening / closing device with a fall prevention receptacle that does not drop into or out of a manhole or onto a human body even if the lid unexpectedly falls from the lid opening / closing device.
A lid lifting tool 120 for contacting and lifting the manhole lid 140 from the upper side of the manhole lid 140, the lid lifting tool 120 being movably provided at a height position below the manhole lid 140, A lid holder 130 for receiving the manhole cover 140 in the case of dropping, and a carriage 110 or a pedestal to which the lid lifting tool 120 and the lid holder 130 are attached. After the manhole cover 140 is lifted, the cover holder 130 is inserted under the manhole cover 140 and is under the cover lifter 120, and the cover holder 130 before the manhole cover 140 is lifted is below the cover lifter 120. The lid holder 130 is configured to be movable between the two states.
[Selection] Figure 1

Description

The present invention relates to a manhole cover opening / closing device with a fall prevention receptacle that prevents an unintended drop accident during opening and closing of a manhole cover.

Conventionally, as a manhole cover opening and closing device, the one shown in FIG. 4 has been proposed and commercialized.
Both are used when one or two people work, but are convenient for opening and closing heavy manhole covers. 4-A is introduced in Patent Document 1. 4-B is described in Patent Document 2. In 4-C, it is shown in Patent Document 3. 4-D is shown in Patent Document 4. Each of them has an arm with a hook that hooks into a hole of the manhole cover, and lifts and opens the manhole cover, which is very convenient. However, since such a conventional lid opening / closing device or lid opening / closing device has only a function of lifting the lid, the lid is removed from the state where the lid is lifted up, and it does not fall into or out of the manhole. Assuming that, unexpected accidents such as falling on the body of the worker who was working under the lid could not be dealt with.

JP2002-138504 6-24032 JP-A-6-246646 JP 2008-95411 A

Compensating the drawbacks of the conventional manhole cover opening / closing device as described above, providing a manhole cover opening / closing device that does not fall into or out of the manhole or fall on the human body even if the lid unexpectedly falls from the lid opening / closing device It is to be.

The manhole cover opening and closing device with a fall prevention receptacle of the present invention has a receptacle for receiving a manhole when it falls, in addition to a lifting tool for lifting the manhole from the upper side of the manhole cover. It is inserted under the lifter and is in the state under the lifting tool, and the receiver before lifting the manhole is out of the position under the lifting tool, and the receiver can move between the two states. It is characterized by being configured.
Hereinafter, it describes along a claim.

The invention according to claim 1 is a manhole cover opening and closing device with a fall prevention receptacle,
A lid lifting tool for contacting and lifting the manhole cover from the upper side of the manhole cover and movably provided at a position below the lid lifting tool and below the manhole cover. It is characterized by comprising a lid receiver for receiving, a lid lifting tool, and a carriage or a pedestal to which the lid receiver is attached.

According to a second aspect of the present invention, in the manhole cover opening / closing device with a fall prevention receptacle according to the first aspect, the lid receptacle is slidable or rotatable with respect to the carriage or the pedestal.

Since it is configured as described above, the manhole cover opening and closing device with the fall prevention receptacle according to the present invention does not drop when receiving the lid that is dropped when the manhole cover is opened or closed, thus preventing accidents caused by falling into or out of the manhole. it can.

It is a figure which shows one embodiment of the manhole cover opening / closing apparatus with a fall prevention receptacle by this invention. It is a figure which shows another embodiment of the manhole cover opening / closing apparatus with a fall prevention receptacle by this invention. It is a figure which shows the example of the cover holder of the manhole cover opening / closing apparatus with a fall prevention holder by this invention. It is a figure which shows the example of the conventional manhole cover opening / closing apparatus or an opening / closing tool.

The manhole cover opening and closing device with a fall prevention receptacle of the present invention includes a lid holder for receiving a manhole cover in the event of a fall, in addition to a lifting tool for lifting the manhole from the upper side of the manhole cover. It is inserted under the manhole and is in the state under the lifting tool, and the receiver before lifting the manhole is out of the position under the lifting tool. It is configured to be movable.
This will be described below with reference to the drawings.

FIG. 1 is a view showing an embodiment of a manhole cover opening and closing device with a fall prevention receptacle according to the present invention. 1-A is an example of a trolley type manhole cover opening / closing device provided with wheels among the manhole cover opening / closing device 100 with a fall prevention receptacle.
A cart 110, a lid lifting tool 120, and a lid receiving tool 130 are provided. For ease of viewing, this is disassembled and shown in 1-B, 1-C, 1-D. The cart 110 is shown by 1-B, and includes a cart frame 112 having wheels 111 and a handle 113 connected to the cart frame 112 for pushing and pulling it by hand. The lid lifting tool 120 is indicated by 1-C and can move up and down relatively with respect to the carriage frame 112, and includes a hook 121 that lifts the manhole lid by hooking it on a hole or the like of the manhole lid. In this example, two hooks 121 are provided to be inserted and pinched into two holes of the manhole cover, and are firmly held, so that the distance between the two hooks 121 can be changed so that the distance between the holes can be accommodated. It has become. For this purpose, the hook 121 is slidably mounted in the longitudinal direction of the lateral piece 122 that is passed to the side, and the lateral piece 122 is connected to the movable shaft 123 that moves up and down through an intervening arm 124 that is interposed therebetween. Yes. In this example, when the handle 125 rotates, the movable shaft 123 is fed by the first rotating body 126 and the belt 127 is rotated, and the second rotating body 128 is rotated. As a result, the movable shaft 123 is engaged with the second rotating body 128. The shaft 123 moves up and down. Therefore, by rotating the handle 125, the hook 121 and hence the manhole cover held by the hook 121 can be moved up and down.
The lid holder 130 is indicated by 1-D, and is slidably held by a lid receiver 131 that moves under the manhole cover and receives the lid, and a slide bar 132 and slide bar 132 that are connected to and slide on the lid holder 131. A holding body 133 is provided, and the holding body 133 is fixedly held by the 1-B carriage frame 112. In this example, the lid receiver 131 includes a net 134 that is passed between two slide bars 132, but only the slide bar 132 itself may be used. In this example, if the push / pull grip portion 135 attached to the slide bar 132 is pushed and pulled, the lid receiving body 131 can be slid with respect to the carriage 110 and horizontally between the position below the hook 121 and the position away from the hook 121. I can move.
1-E shows the upper and lower positional relationships of the manhole cover 140, the lid holder 130, and the lid lifting tool 120. The lid holder 130 is in a positional relationship to enter the manhole lid 140 and support it in case it falls.

FIG. 2 is a view showing another embodiment of a manhole cover opening / closing device with a fall prevention receptacle according to the present invention. The manhole cover opening / closing device 100 with the fall prevention receiver also includes the cover lifting tool 120, the cover receiver 130, and the cart or the pedestal 110. Common to 2-A to 2-C,
The lid holder 130 is installed on the carriage or pedestal 110 so as to be slidable laterally, and the lid lifting tool 120 is provided around the rotation shaft 151 attached to the tip of the support column 150 rising on the carriage or pedestal 110. The arm rod 152 that rotates up and down is provided, and a hook 121 and a horizontal piece 122 having a variable interval are installed at the tip of the arm rod 152. Therefore, when the arm rod 152 is rotated up and down, the hook 121 is lowered, the hole of the manhole cover is caught by the hook 121, and then the arm rod 152 is returned, the manhole cover is raised and opened. Is advanced to the lower side of the hook 121, it can be located under the manhole cover.
When describing different things in each figure, 2-A and 2-C are trolleys with wheels, but 2-B is a pedestal. The difference between 2-A and 2-C is that, in 2-A, there is a push / pull grip 135 for sliding, but in 2-C, a pull wire 136 is connected to the slide bar 132. When the pedal 137 is depressed, the slide bar 132 is pulled back to move backward, and when it is not the depressed position, the slide bar 132 is advanced by a restoring body 138 such as a spring.
In either case, the arm bar 152 can be rotated around the axis of the support column 150.
The above two examples are examples in which the conventional 4-C and 4-D are improved, but can be applied to any example.

FIG. 3 is a view showing an example of a lid holder of a manhole cover opening / closing device with a fall prevention holder according to the present invention. In 3-A, it slides back and forth as in 1-D. In 3-B, the position of the lid holder is changed by rotating around the rotation axis. The receiver is a two-bar fold.

As described above, the manhole cover opening and closing device with the fall prevention receptacle according to the present invention does not drop when receiving the lid when the manhole cover is opened or closed, so it can prevent accidents due to falling into or out of the manhole and industrial use. And the effect is extremely great.

DESCRIPTION OF SYMBOLS 100 Manhole cover opening / closing apparatus with fall prevention receptacle 110 Carriage 111 Wheel 112 Carriage frame 113 Handle 120 Lid lifting tool 121 Hook 122 Horizontal piece 123 Movable shaft 124 Intervening arm 125 Handle 126 First rotary body 127 Belt 128 Second rotary body 130 Lid Receiving tool 131 Lid receiving body 132 Slide bar 133 Holding body 134 Net body 135 Push-pull grip part 136 Pulling wire 137 Pedal 138 Restoring body 140 Manhole cover 150 Supporting column 151 Rotating shaft 152 Arm bar

Claims (2)

A lid lifting tool for contacting and lifting the manhole cover from the upper side of the manhole cover and movably provided at a position below the lid lifting tool and below the manhole cover. A manhole cover opening and closing device with a fall prevention receiver, comprising: a lid receiver for receiving; a lid or a pedestal to which the lid lifter and the lid holder are attached; 2. The manhole cover opening / closing device with a fall prevention receiver according to claim 1, wherein the cover holder is slidable or rotatable with respect to the carriage or the pedestal.

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