JP2021017780A - Opening/closing moving device of manhole cover - Google Patents

Abstract

To reasonably lift and move a manhole cover blocking an opening of a common conduit, a manhole and or the like from the opening.SOLUTION: An opening/closing moving device of a manhole cover is composed of: a moving base 1 that connects left and right base frames 2 arranged on both sides of a manhole cover M with front and rear connection bars 9 and can make the base frames movable by moving wheels 5; lifting mechanisms 10 that are provided the left and right base frames 2 in raised states; suspension bars 15 that are installed between the lifting mechanisms 10 and are lifted up/down by a lifting operation of the lifting mechanisms 10; and suspension tools 20 that are connected to the suspension bars 15, are fit into engagement holes P opened in the manhole cover M, and are engaged with hole edges of the engagement holes P. The suspension tool 20 includes a suspension tool body 21 having an engagement end 22 and a rotation stopper 23, engages an engagement end 22 with the engagement hole P by rotation by almost 90 degrees after insertion of the suspension tool body 21 into the engagement hole P, and prevents rotation and extraction of the suspension tool body 21 by fitting of the rotation stopper 23.SELECTED DRAWING: Figure 1

Description

According to the present invention, for example, in a utility tunnel, a manhole, etc. installed for burying various cables such as power lines and communication lines in the ground, when opening the manhole cover that closes the opening of the utility tunnel, etc., the manhole cover The present invention relates to a manhole cover opening / closing moving device that allows the manhole cover to be lifted and moved without difficulty from the opening.

Recently, from the viewpoint of creating a beautiful townscape and a comfortable living environment, utility poles are being promoted by burying various cables in the ground instead of fictitious wiring. These cables are laid in a state protected by, for example, manholes, utility tunnels, and common buried pipes installed underground. For manholes, utility tunnels, etc., the manhole cover, etc. that closes the opening is opened for inspection, change of branching mode, and other needs.

However, many manhole covers weigh a considerable amount of about 100 to 300 kg, and even if a worker tries to open them manually, it cannot be easily done. Therefore, for example, a manhole cover opening / closing transport device shown in Patent Document 1, a manhole cover opening / closing device shown in Patent Document 2, and the like have been proposed. In the opening / closing transport device of Patent Document 1, wheels are arranged on extension portions provided at the lower ends of the left and right lever bodies connected by handles so that the hanging pieces of the working arms provided on the extension portions can be locked to the manhole. As a result, the manhole cover can be lifted through the hanging piece by the lever action by tilting the lever body with the handle while the hanging piece is connected to the manhole cover. The opening / closing device of Patent Document 2 is formed by providing a slider that locks to a manhole cover at the tip of a base frame that is L-shaped when viewed from the side surface and providing wheels at the lower end of the rear portion of the base frame. The manhole cover is lifted by the patent action when the base frame is tilted backward with the slider locked and fixed to the lid.

Japanese Unexamined Patent Publication No. 61-176721 Japanese Unexamined Patent Publication No. 2001-55749

By the way, in order to lift the manhole cover of an opening such as a utility tunnel, it is necessary to set it sufficiently high, and if it is not lifted to a certain high position, the manhole cover will be caught by the edge of the opening and will be sufficiently opened. Sometimes you can't. However, in the conventional switchgear, switchgear, etc. described above, the tip portion is connected and fixed to the manhole cover, and the handle or the like with the bottom as the fulcrum is lifted by a lever action such as tilting downward. If the distance from the fulcrum position to the action point position, which is the connecting position with the manhole cover, is small, even if the acting force increases, it cannot be lifted to a sufficient height. On the contrary, if the interval is increased, the acting force becomes smaller and the steering wheel operation becomes heavier, so that the merit of the lever action cannot be fully utilized. In particular, recent manhole covers tend to be thicker in order to increase the load-bearing capacity of automobiles and the like that come and go on the road surface, and it becomes more difficult to lift such manhole covers sufficiently high. ..

Therefore, the present invention was created in view of various existing circumstances as described above. For example, even if the manhole cover is formed to be considerably thick and tall and is heavy in weight, the manhole cover is surely formed. It is an object of the present invention to provide a manhole cover opening / closing moving device that can be lifted and that the manhole cover can be easily moved in the lifted state.

In order to solve the above-mentioned problems, in the present invention, the left and right base frames 2 arranged on both sides of the manhole cover M are connected by the front and rear connecting bars 9, and are movable by the moving wheels 5. The moving base 1, the elevating mechanism 10 provided on each of the left and right base frames 2 in a pedestal shape, and the hanging bar 15 which is mounted between the elevating mechanisms 10 and is elevated by the elevating operation by the elevating mechanism 10. A hanger 20 which is connected to the hanging bar 15 and is fitted into the locking hole P opened in the manhole cover M and locked to the hole edge of the locking hole P is provided. It is characterized by.
Each of the base frames 2 rotatably supports the moving wheels 5 at the front and rear portions of the base 3 formed long in the front and rear, and clamps on the connecting support plate 7 fixed to the base 3 so as to cover the moving wheels 5. 8 is fixed, and the connecting bar 9 can be detachably held by the clamp tool 8.
A steady rest 9A that abuts and supports the lifted manhole cover M can be fixed to the lower surface of the connecting bar 9.
The elevating mechanism 10 has an inner pillar 11 fixed on the base 3 of the base frame 2, a tubular elevating outer pillar 12 covering the inner pillar 11, and an elevating outer pillar 12 by a screw feed operation. The hanging bar 15 is provided on each of the bar support portions 14 fixed to the side surfaces of the elevating outer pillars 12 facing each other on the left and right sides, and provided with the elevating operation handle 13 that elevates and elevates along the elevating outer pillar 12 It can be detachably mounted and fixed.
The hanger 20 has a flat rectangular locking end 22 at the lower end that locks to the hole edge of the locking hole P by rotating approximately 90 degrees after being inserted into the locking hole P of the manhole cover M. The shape of the hanger body 21 and the rotation provided in the hanger body 21 so as to be inserted into the locking hole P and slid up and down along the hanger body 21 to prevent the hanger body 21 itself from rotating. A stopper 23 and a connecting ring 25 for connecting the hanging tool main body 21 to the hanging bar 15 via the hanging member 24 can be provided.
In the present specification, the "manhole cover" closes not only the name of the invention but also the opening of the manhole, the opening of the common groove for wiring and piping on the road surface, the roadside band, the sidewalk, and the like and other openings. Includes various lid materials.

In the manhole cover opening / closing moving device according to the present invention configured as described above, the moving base 1 is arranged so as to straddle the manhole cover M, and the hanger 20 is fitted into the manhole cover M and locked. The manhole cover M can be removed and opened from the joint groove and the opening of the manhole by the lifting operation by the lifting mechanism 10, and can be moved to a predetermined place by the moving wheel 5, and maintenance work of the common groove, the manhole, etc. is performed.
The moving base 1 itself is integrally formed by the connecting bars 9 because the clamps 8 arranged in front of and behind the left and right base frames 2 connect the base frames 2 to each other, and the base frame 2 itself. It is freely moved by the moving wheel 5.
By raising and lowering the elevating outer pillar 12 by the elevating operation handle 13 of the elevating mechanism 10, the hanging bar 15 mounted by the bar support portion 14 is also raised and lowered, and the hanging tool 20 connected to the hanging bar 15 is raised and lowered. Then, the manhole cover M is lifted or lowered without difficulty.
The locking end 22 of the hanging tool main body 21 in the hanging tool 20 is locked to the hole edge of the locking hole P by rotating 90 degrees after being fitted into the locking hole P of the manhole cover M, and then the rotation stopper 23 The fitting into the locking hole P prevents the hanger body 21 from being separated from or removed from the locking hole P, and securely suspends the manhole cover M.
The steady rest 9A is brought into contact with the lifted manhole cover M so that it does not shake even during transportation when it is moved by the moving base 1, and it is safely and stably supported.

Since the present invention is configured as described above, the manhole cover M that closes the openings such as the utility tunnel and the manhole can be lifted or lowered by the elevating mechanism 10 in a locked state by the hanger 20. Moreover, since the lifting height can be set within an elevating range equal to or larger than the wall thickness of the manhole cover M, the manhole cover M can be reliably removed from the opening.

That is, in the present invention, the moving base 1 which can be positioned while straddling the manhole cover M and is movable by the moving wheels 5, and the elevating mechanism 10 provided in a pedestal shape on each of the left and right base frames 2. A hanging bar 15 that is mounted between the lifting mechanisms 10 and lifted by the lifting mechanism 10 and a suspension that is connected to the hanging bar 15 and is locked to the hole edge of the locking hole P of the manhole cover M. This is because it is provided with the tool 20. As a result, the opening of the utility tunnel, the manhole, etc. can be opened and closed by surely suspending the manhole cover M, moving in the suspended state, and the like, and maintenance work thereof can be smoothly performed.

Further, the moving base 1 is integrally composed of the left and right base frames 2 and the front and rear connecting bars 9 that connect the base frames 2 to each other in the front and rear by the clamps 8 arranged on the base frame 2. It can be easily moved by the moving wheels 5 while straddling the cover M, and can be disassembled by removing the connecting bar 9, the hanging bar 15, etc., and can be carried in and out of the work site in a compact state.

The elevating mechanism 10 can elevate the elevating outer column 12 along the inner column 11 by elevating the elevating operation handle 13, and the elevating mechanism 10 itself is hung on the left and right base frames 2. The manhole cover M can be reliably removed from the opening and lifted by the bar 15 and the hanger 20 by moving the manhole cover M up and down along the vertical direction regardless of the thickness of the manhole cover M.

The hanger 20 includes a hanger body 21 having a locking end 22, a rotation stopper 23, and a connecting ring 25, and the hanger body 21 is inserted into the locking hole P, and then rotated and rotated by approximately 90 degrees. The stopper 23 can be securely locked or removed from the locking hole P by fitting the stopper 23 with a simple operation.

It should be noted that the reference numerals added in each of the means for solving the above-mentioned problems and the section of the effect of the invention are added in order to facilitate reference with the parts indicating the constituent parts described in the drawings. The present invention is not limited to the structure, shape, etc. indicated by these descriptions, reference numerals, etc. in the drawings.

It is a perspective view which shows one embodiment for carrying out this invention. It is also a front view of a used state in which the manhole cover is lifted. It is also a plan view. It is also a side view. Similarly, it is an explanatory view when the hanger is fitted into the manhole cover and held, the (A) is a cross-sectional view after the fitting, and (B) is a plan view when the hanger body is rotated after the fitting. C) is a cross-sectional view when the rotation stopper is further fitted after rotation.

Hereinafter, a mode for carrying out the present invention with reference to the drawings will be described. Reference numeral 1 shown in the drawings is a moving base, and the moving bases 1 are arranged in pairs on the left and right sides. The frames 2 are connected to each other by, for example, a connecting bar 9 made of a pipe, and moving wheels 5 are supported in front of and behind the base frame 2.

Each of the base frames 2 rotatably supports the moving wheels 5 at the front and rear portions of the side plate portion 4 of the base 3 which is formed in a cross-sectional groove shape which is long in the front-rear direction and is open upward, and also in the front-rear portion of the side plate portion 4. The clamp tool 8 is fixed on the connecting support plate 7 fixed to the base 3 so as to cover the moving wheel 5 on the upper portion, and the clamp tools 8 arranged on the front, rear, left and right sides between the left and right base frames 2. The connecting bar 9 before and after being bridged is detachably held.

The moving wheel 5 is formed as, for example, a rubber tire, and is rotatably supported on a wheel shaft mounted between the side plate portions 4 of the base 3 by being positioned within the side plate portions as shown in the illustration. As shown in the example, the left and right base frames 2 are supported in front of and behind each other, so that a total of four are arranged. Further, one of the moving wheels 5 arranged in the front-rear direction can be stopped and held by a wheel stopper 6 provided on the connecting support plate 7.

The connecting support plate 7 covers the moving wheels 5 from above at the front and rear portions of the side plate portion 4, so that the safety of work during movement is taken into consideration.

The clamp tool 8 is placed on the connecting support plates 7 arranged at the front and rear portions of the base frame 2.
By being fixed, a total of four bars are arranged in front, back, left and right, and the connecting bars 9 held by the clamps 8 are hung in a substantially parallel state at the front and rear positions between the left and right base frames 2. There is. As a result, the moving base 1 itself can be moved by the moving wheels 5 in which the left and right base frames 2, the front and rear connecting bars 9, and the like are integrated.

The connecting bar 9 itself is not small compared to the width of the manhole cover M that is lifted and moved, and during on-site work, the base frames 2 are arranged on both sides of the manhole cover M while straddling the manhole cover M. It has become. On the lower surface of the connecting bar 9, for example, a steady rest 9A having a groove shape, which comes into contact with the manhole cover M when the manhole cover M is lifted to prevent the manhole cover M from shaking or the like, is fixed.

Further, on each of the left and right base frames 2 of the moving base 1, self-supporting elevating mechanisms 10 are mounted in pairs on the left and right in a stance shape, and the suspension is mounted between the left and right elevating mechanisms 10. A hanger 20 that is inserted and engaged in the locking hole P of the manhole cover M is connected to the bar 15.

The elevating mechanism 10 is located at substantially the center of the base 3 in the base frame 2 and is fixed on the base 3, and covers the inner pillar 11 fixed to the base 3 itself and the inner pillar 11 to cover the inner pillar 11. A tubular elevating outer pillar 12 having a double structure together with 11 and an elevating outer pillar 12 provided on the inner pillar 11 are moved up and down along the inner pillar 11 by a screw feed operation. It is provided with an elevating operation handle 13 arranged on the elevating outer pillar 12 so as to elevate and descend together with the elevating outer pillar 12. The elevating mechanism 10 is, for example, the trade name Tongue Jacks (https://www.bulldogproducts.net/products/trailer-jacks/round-jacks/trailer) of CEQUENT PERFORMANCE PRODUCTS, INC. In Plymouth, MI 48170 USA. -weld-on-jack-2-000-lbs / USX3uVM! Va79b3UMDH4nwKrzZvGs3OOXR9C7Fn1hm% 7Ck =) is used.

In the elevating mechanism 10, the elevating outer column 12 moves up and down as it is without rotating along the inner column 11 by the rotation operation of the elevating operation handle 13 along the horizontal direction. If necessary, the left and right elevating mechanisms 10 can be operated synchronously.

The hanging bar 15 is made of, for example, a pipe, and is, for example, fitted into each of the bar support portions 14 fixed to the side surfaces of the elevating mechanism 10 so as to face each other and screwed from the outside of the bar support portion 14. By being fixed by the fixing screw 16, the left and right elevating devices 10 are mounted and fixed to each other. By doing so, the elevating outer pillar 12 that is elevated and lowered by the rotation operation of the elevating operation handle 13 raises and lowers the hanging bar 15 and the hanger 20 together with the bar support portion 14. Further, the hanging bar 15 can be attached / detached by screwing or releasing with the fixing screw 16, and the moving base 1 can be disassembled into the left and right base frames 2 at the same time as the connecting bar 9 is attached / detached, and can be assembled. Easy to carry, carry in and out of the site.

The hanger 20 has a flat rectangular shape that locks to the hole edge of the locking hole P by rotating approximately 90 degrees after being inserted into the flat rectangular locking hole P formed in the manhole cover M. A hanger body 21 having a rectangular cross section with a locking end 22 at the lower end, and a hanger body 21 that can be slid up and down along the hanger body 21 so as to be inserted into the locking hole P and prevent the hanger body 21 itself from rotating. A rotation stopper 23 provided on the hanging tool main body 21 and a loop-shaped connecting ring 25 for connecting the hanging tool main body 21 to the hanging bar 15 via a hanging member 24 such as a chain are provided. In the illustrated example, the hanging tool main body 21 is detachably engaged with a hook in which an eye nut provided at the upper end of the hanging tool main body 21 is connected to the lower end of the hanging member 24.

Further, the opening shape of the locking hole P and the planar shape of the locking end 22 correspond to the length and width of the long side and the short side, respectively, and when rotated 90 degrees after insertion, the locking hole The locking end 22 is assumed to engage with the hole edge of P.

In the hanger 20, after fitting the locking end 22 of the hanger body 21 into the locking hole P opened in the manhole cover M, the hanger 20 is rotated 90 degrees along the horizontal direction to rotate the locking end 22. It is supposed to be locked to the hole edge of the locking hole P, and then the rotation stopper 23 is slid downward to be fitted into the locking hole P. By fitting the rotation stopper 23 into the locking hole P in this way, the rotation of the hanger body 21 is prevented, and the engagement of the locking end 22 with the locking hole P is maintained.

Next, an example of using the opening / closing moving device of the present invention configured as described above will be described. The left and right sides of the moving base 1 are placed on both sides of the manhole cover M that closes the openings such as the utility tunnel and the manhole that are installed. The locking end 22 of the hanging tool main body 21 in the hanging tool 20 connected to the hanging bar 15 is fitted into the locking hole P of the manhole cover M, rotated 90 degrees, and the rotation stopper The 23 is slid downward and fitted into the locking hole P. Next, the hanging bar 15 mounted between the elevating outer pillars 12 is raised by the elevating outer pillar 12 which is raised by the operation of the elevating operation handle 13 of the left and right elevating mechanism 10, and the manhole cover is raised by the hanging tool 20. Lift M and bring it into contact with the steady rest 9A. After that, it is moved to a predetermined place by the moving wheel 5, and a predetermined maintenance work in the utility tunnel and the manhole is performed.

Further, when the manhole cover M is moved or closed again, the hanger 20 can be removed from the manhole cover M by removing the rotation stopper 23 and the hanger body 21 itself from the locking hole P after reverse rotation. Good.

When not needed, the connecting bar 9 can be removed from the clamp tool 8 and the hanging bar 15 can be removed from the elevating mechanism 10 to disassemble the left and right base frames 2 into a compact size. Can be put together.

M ... Manhole cover P ... Locking hole 1 ... Moving base 2 ... Base frame 3 ... Base 4 ... Side plate 5 ... Moving wheel 6 ... Wheel stopper 7 ... Connecting support plate 8 ... Clamping tool 9 ... Connecting bar 9A ... Anti-sway tool 10 ... Lifting mechanism 11 ... Inner pillar 12 ... Lifting outer pillar 13 ... Lifting operation handle 14 ... Bar support 15 ... Hanging bar 16 ... Fixing screw 20 ... Hanging tool 21 ... Hanging tool body 22 ... Locking end 23 ... Rotating stopper 24 ... Suspension material 25 ... Connecting ring

Claims (5)

The left and right base frames arranged on both sides of the manhole cover are connected by the front and rear connecting bars, and the moving base is made movable by the moving wheels, and the elevating mechanism provided on each of the left and right base frames in a stance shape. A hanging bar that is mounted between the lifting mechanisms and is lifted and lowered by the lifting operation by the lifting mechanism, and a locking hole that is connected to the hanging bar and is opened in the manhole cover. A manhole cover opening / closing moving device, characterized in that it is provided with a hanging tool that is locked to the edge of the locking hole. Each base frame has moving wheels rotatably supported by the front and rear parts of the base, which are long in the front and rear, and clamps are fixed on a connecting support plate fixed to the base so as to cover the moving wheels. The manhole cover opening / closing moving device according to claim 1, wherein the connecting bar is detachably held by the clamp tool. The manhole cover opening / closing moving device according to claim 1 or 2, wherein a steady rest device for abutting and supporting the lifted manhole cover is fixed to the lower surface of the connecting bar. The elevating mechanism consists of an inner pillar fixed on the base of the base frame, a tubular elevating outer pillar covering the inner pillar, and a screw feed operation to move the elevating outer pillar up and down along the inner pillar. Claims 1 to 1, further comprising an elevating operation handle for elevating and lowering together with the elevating outer pillar, and the hanging bar is detachably mounted and fixed to each of the bar support portions fixed to the side surfaces of the elevating outer pillars facing each other on the left and right. The manhole cover opening / closing moving device according to any one of 3. The hanger has a rectangular-shaped hanger body with a flat rectangular locking end at the lower end that locks to the edge of the locking hole by rotating approximately 90 degrees after being inserted into the locking hole of the manhole cover. And, so as to be inserted into the locking hole and prevent the rotation of the hanger body itself, it can be slid up and down along the hanger body and hung via a rotation stopper provided on the hanger body and a hanging material. The manhole cover opening / closing moving device according to any one of claims 1 to 4, wherein the lower bar is provided with a connecting ring for connecting the hanging tool main body.

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