JPH0717842U - Opening device for manhole - Google Patents

Abstract

(57) [Summary] [Purpose] The manhole cover attached to the receiving frame either before or after construction can be removed regardless of its size, is easy to carry, and is small and lightweight. I will provide a. [Structure] A main body rod 6 having a carrying handle 15 is formed with an elongated hole 7 along one longitudinal direction at one end side, and a hook 8 engaged with a handle 4 of a manhole cover 1 is located in the elongated hole 7. While being adjustably attached, a jack body 11a whose lower end portion can come into contact with the outer peripheral flange 5 of the receiving frame 2 of the manhole lid 1 is arranged on the other end side of the main rod 6 to form a lid opening device. did.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lid opening device for trimming and lifting a manhole lid.

[0002]

[Prior art]

 Generally, when a cast iron manhole cover attached to the opening of a manhole is to be removed, the sediment accumulated in the space between the manhole cover and its receiving frame is solidified, or it is installed on one side. If the packing is attached to the other side, it will be difficult to open it with only human power. Therefore, a lid opening device for easily opening the manhole lid is used.

In a conventional general lid opening device, as shown in FIG. 6, a supporting rod b having a long hole-shaped insertion hole a is horizontally supported by supporting legs c and c arranged at both ends. On the other hand, a pair of screw rods g, g having hooks f, f at the lower ends, which are engaged with the handles e, e of the manhole cover d, are inserted into the insertion hole a from above and screwed onto the upper part thereof. The nuts h, h are configured to support the screw rods g on the support rod b. Then, the support rod b is passed over the manhole cover d, and the nuts h and h are engaged with a wrench or the like in a state in which the hooks f 1 and f 2 of the screw rods g and g are engaged with the handles e 1 and e 2 of the manhole cover d. When the mandrel lid d is lifted by cutting the mandrel lid d from the receiving frame i by rotating with the tool to raise the screw rods g and g, the manhole lid d is moved together with the supporting rod b in this state. I have to.

[0004]

[Problems to be solved by the device]

 By the way, the receiving frame i of the manhole cover d fixed to the opening of the manhole is constructed with the manhole cover d removed from the receiving frame i at the time of its installation. Since the lid d and the receiving frame i are shipped with the manhole lid d attached to the receiving frame i, the manhole lid d must be temporarily removed from the receiving frame i at the site of construction at the time of construction.

Usually, this removal work is manually performed by a simple tool having a hook at the tip, but if the manhole cover d is firmly attached to the receiving frame i, the removal is not easy. Absent. Therefore, when attempting to open the edge of the manhole cover d before such construction using the above-described opening device, the supporting legs c and c at both ends of the supporting rod b are connected to both sides of the receiving frame i. It is necessary to mount it on the upper surface of the outer peripheral flanges j, j located at, and hold the receiving frame i by the supporting legs c, c so that the manhole cover d is relatively hoisted.

However, in the conventional lid opening device, the space between the support legs c 1 and c 2 and other sizes are not set so as to be able to cope with such a usage mode, and even if it can be used, the manhole lid d is not used. There are several different outer diameter sizes, and the receiving frame i of each manhole lid d also has a different size. Therefore, as described above, the supporting legs c and c of the supporting rod b are attached to the outer peripheral flanges j and j of the receiving frame i. In order to mount and use it on the upper surface, it is necessary to prepare several kinds of lid opening devices corresponding to the size of each receiving frame i.

Further, since the conventional lid opening device is used by straddling over the manhole lid d, it is large in size and has a considerable weight, which makes it inconvenient to carry. Furthermore, since the manhole cover d must be manually lifted together with the opening device when the manhole cover d is moved, the weight of the opening device is added and extra force is required. Then it is not easy to carry.

An object of the present invention is to provide a manhole opening device that does not have such drawbacks.

[0009]

[Means for Solving the Problems]

 A first means of the present invention comprises a handle for carrying, a main rod having a long hole formed in one end side along a longitudinal direction, and a position adjustment and a height adjustment in the long hole of the main rod. A hook that is attached to the handle of the manhole lid and is detachably engaged with it, and the hook is disposed on the other end side of the main rod corresponding to the outer peripheral brim of the receiving frame of the manhole lid to raise and lower the main rod. The jack body is connected to the screw rod screwed in the vertical direction to the main rod and the lower end portion of the screw rod, and abuts on the upper surface of the outer peripheral flange of the receiving frame. It is characterized in that it is constituted by a pedestal that supports the screw rod so as to be freely rotatable.

The second means of the present invention comprises a handle for carrying, a main rod having a long hole formed in one end side along the longitudinal direction, and a position adjustment and a height adjustment for the long hole of the main rod. And a hook that is detachably engaged with the handle of the manhole cover, and the main rod that is disposed on the other end side of the main rod that corresponds to the outer peripheral brim of the receiving frame of the manhole cover. By means of a screw rod that is screwed in the vertical direction on the main rod and whose lower end portion is capable of abutting on the upper surface of the outer peripheral flange of the receiving frame. It is characterized by being configured.

[0011]

[Action]

 First, the main rod is placed on the manhole lid so that the jack body comes to the receiving frame side, and the hook is positionally adjusted along the long hole of the main rod and locked to the handle of the manhole lid. Next, when the screw rod is screwed down in a predetermined direction and lowered, the pedestal in the first means and the lower end portion of the screw rod in the second means respectively come into contact with the outer peripheral brim of the receiving frame. When the screw rod is further screwed in this state while contacting, the main rod is relatively lifted, and the manhole lid is edged and pulled up by the hooks supported by the main rod.

Further, when the manhole cover is moved, a simple hook-shaped tool is engaged with the other handle of the manhole cover, and the manhole cover is suspended by the tool and the handle provided on the main rod. be able to.

[0013]

【Example】

 Embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 3 are drawings showing a first embodiment, in which 1 is a manhole cover and 2 is a receiving frame of the manhole cover 1. The manhole cover 1 is provided with a pair of handle holes 3 and 3 (one of which is omitted) at both left and right positions, and the handles 4 are horizontally mounted in the handle holes 3 and 3, respectively. Further, the receiving frame 2 is provided with an outer peripheral brim edge 5 which is horizontally projected toward the outer side.

Reference numeral 6 denotes a main rod that constitutes a lid opening device for a manhole according to the present invention. The main rod 6 is formed to have an inverted U-shaped cross section, and is formed from one of the handle holes 3 of the manhole lid 1. It is provided with a length that can be passed over the outer peripheral brim 5 of the outer receiving frame 2. In this example, a so-called C-type channel steel is used as the main rod 6. A handle 15 for transportation is attached to the upper surface of the main rod 6 at a substantially central portion thereof. Further, an elongated hole 7 is provided at one end of the main rod 6 along the longitudinal direction thereof. The elongated hole 7 may be opened on one side at the edge of the main rod 6.

A hook 8 that is detachably engageable with the handle 4 of the manhole cover 1 is attached to the elongated hole 7 in a positionally adjustable manner. The hook 8 is provided with a male screw portion 9 on the base side. A nut 10 is screwed onto the male screw portion 9 above the elongated hole 7, and the nut 10 supports the hook 8 at both side edges of the elongated hole 7. The height of the hook 8 can be adjusted by adjusting the screwing position of the nut 10.

On the other hand, a jack body 11 a is arranged at the other end of the main rod 6 corresponding to the outer peripheral flange 5 of the receiving frame 2. The jack body 11a is connected to a screw rod 13 which is vertically screwed into a screw hole 12 of a main rod 6 and a lower end portion of the screw rod 13, and abuts on an upper surface of an outer peripheral flange 5 of the receiving frame 2. And a possible pedestal 14. The pedestal 14 is formed in a box shape having a U-shaped cross section with an appropriate height, and a lower end portion of the screw rod 13 having a small diameter is loosely fitted from above through a stepped portion to the protruding end thereof. The washer 15 for retaining is fixed by welding or the like for connection. As a result, when the pedestal 14 contacts the upper surface of the outer peripheral flange 5 of the receiving frame 2, the pedestal 14 can rotatably support the screw rod 13. As shown in FIG. 4, the pedestal 14 is sized so that it can be housed in the main rod 6 when the screw rod 13 is raised.

With this configuration, when the manhole cover 1 attached to the receiving frame 2 before construction is to be removed, as shown in FIG. 1, the jack body 11 a is placed on the outer peripheral brim edge 5 of the receiving frame 2. The main rod 6 is arranged so as to be positioned, the position of the hook 8 is adjusted by the elongated hole 7, and then the hook 8 is engaged with the handle 4 of the manhole cover 1. Here, when the nut 10 screwed into the male screw portion 9 of the hook 8 is tightened until the hook 8 does not move, the main rod 6 is fixed to the manhole cover 1.

Next, when the screw rod 13 is screwed in a predetermined direction with a tool such as a wrench, since the screw rod 13 is screwed with the main rod 6, the screw rod 13 gradually descends and the pedestal 14 at the lower end thereof is screwed. Contacts the upper surface of the outer peripheral flange 5 of the receiving frame 2. When the screw rod 13 is further screwed, the main rod 6 is relatively lifted. At this time, the lower end of the screw rod 13 is supported by the base 14 and idles.

In this way, since the main rod 6 is lifted, the manhole cover 1 is cut off from the receiving frame 2 by the hook 8 supported by the main rod 6 and pulled up.

Further, as described above, if the manhole cover 1 is cut at one place, the manhole cover 1 can be easily removed from the receiving frame 2 without cutting the opposite side. For this reason, when the manhole cover 1 is moved, a simple hook-shaped tool (not shown) is engaged with the other handle 4 of the manhole cover 1, and by the tool and the handle 15 provided on the main rod 6. The manhole cover 1 can be lifted and moved.

On the other hand, when opening the manhole cover 1 attached to the receiving frame 2 after the construction, as shown in FIG. 4, the pedestal 14 at the lower end of the screw rod 13 is raised to move the main rod 6 Is placed on the manhole cover 1. In this state, similarly to the above, the hook 8 is engaged with the handle 4 of the manhole cover 1 and then the screw rod 13 is screwed to contact the ground around the manhole cover 1. The main body rod 6 is lifted by the screw rod 13 that idles on the pedestal 14, and the manhole cover 1 can be edged and pulled up by the hook 8 of the main body rod 6.

The connecting structure of the screw rod 13 and the pedestal 14 that form the jack body 11 a may be any structure as long as the lower end portion of the screw rod 13 is idle with respect to the pedestal 14, and the structure shown in the embodiment. It is not limited to.

FIG. 5 is a view showing a second embodiment, in which the jack body 11 b is composed of only the screw rod 13, and the lower end portion of the screw rod 13 is directly attached to the upper surface of the outer peripheral flange 5 of the receiving frame 2. It is provided so as to abut. Even with such a configuration, as in the first embodiment, the manhole cover 1 attached to the receiving frame 2 before and after the construction can be trimmed and pulled up. In addition, when using it after construction, if a metal plate is inserted at the lower end of the screw rod 13, the pavement surface around the manhole cover 1 may be damaged by the screw rod 13. It can be prevented.

[0024]

[Effect of device]

 As described above, the present invention forms a long hole along the longitudinal direction on one end side of a main rod provided with a handle for carrying, and a hook for engaging a handle of a manhole cover is positioned in the long hole. Before and after the construction, the jack opening device was constructed by arranging it so that the lower end can abut on the outer flange of the receiving frame of the manhole cover on the other end of the main rod. The manhole lids attached to any of the receiving frames can be trimmed and pulled up, and the function of adjusting the position of the hooks makes it possible to apply to manhole lids of various sizes.

In addition, the handle provided on the main rod makes it easy to move the manhole cover when the cover is opened and to carry the device itself. Furthermore, the size is smaller than that of the conventional cover opening device. It has an excellent effect that it is lightweight and can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view of a manhole opening device of a first embodiment showing a state in which a manhole cover attached to a receiving frame before construction is removed.

FIG. 2 is a plan view of the manhole opening device according to the first embodiment.

FIG. 3 is a side view of the above.

FIG. 4 is a vertical cross-sectional front view of the manhole opening device of the first embodiment showing a state in which a manhole cover attached to a receiving frame after construction is removed.

FIG. 5 is a vertical sectional front view of a manhole opening device according to a second embodiment.

FIG. 6 is a partially cutaway front view of a conventional manhole opening device.

[Explanation of symbols]

 1 Manhole Cover 2 Receiving Frame 4 Handle 5 Outer Border 6 Main Rod 7 Long Hole 8 Hooks 11a, 11b Jack 13 Screw Rod 14 Pedestal 15 Handle

Claims (2)

[Scope of utility model registration request] 1. A manhole cover provided with a handle for carrying, a main rod having a long hole formed in one end side along a longitudinal direction, and a manhole cover attached to the long hole of the main rod for position adjustment and height adjustment. And a jack body that is disposed on the other end side of the main rod corresponding to the outer peripheral brim of the receiving frame of the manhole cover and that moves up and down the main rod. , The jack body is connected to a screw rod vertically screwed to the main rod and a lower end portion of the screw rod, and is abutted on an upper surface of an outer peripheral flange of the receiving frame to allow the screw rod to freely rotate. An opening device for a manhole, characterized in that it is constituted by a pedestal supported on the. 2. A manhole cover provided with a carrying handle and having a long hole formed in one end side along a longitudinal direction, and a manhole cover attached to the long hole of the main rod so that position adjustment and height adjustment are possible. And a jack body that is disposed on the other end side of the main rod corresponding to the outer peripheral brim of the receiving frame of the manhole cover and that moves up and down the main rod. The mandrel cover is characterized in that the jack body is screwed in the vertical direction on the main rod, and the lower end portion is constituted by a screw rod capable of abutting on the upper surface of the outer peripheral brim of the receiving frame. apparatus.