JP5266038B2 - Method for removing temporary road surface of manhole cover in paved road construction and expansion locking tool for removal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of efficiently and safely removing a temporary road surface at a manhole cover using a small tool. <P>SOLUTION: The method of removing a temporary road surface at a manhole cover in a road pavement construction comprises a cutting step of forming a cut pavement plate by cylindrically cutting the outer periphery of a cover plate D or a curing plate D1 buried in a paved road surface, a formation step of forming a cylindrical center hole 14 at the center of the cut pavement plate G, and a step of separating the cut pavement plate G by fitting a locking claw 2 between itself and the cover plate or the curing plate at the bottom of the center hole 14 of the cut pavement plate G using the expanding/locking tool disposed in the center hole 14 formed in the formation step and towing, raising, and removing the cut pavement plate by fitting a rope therebetween using a locking ring provided to the expanding/locking tool. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  TECHNICAL FIELD The present invention relates to a new paving work having a manhole or a repairing work for a paved road, and relates to a method for removing a temporary road surface of a manhole cover in paved road work and an expansion locking tool for removal.

  A paving method, an overlay method, or a cutting overlay method is generally known as a new or repair work for a paved road (see, for example, Patent Document 1).

  Of these construction methods, the pavement method and the cutting overlay method are both removed from the manhole cover and manhole frame at the beginning or middle of the construction process in order to adjust the height of the manhole cover provided on the road or to replace it with a new one. Then, cover the entire road surface by forming a blind state with a cover plate and a curing plate, then cut and remove the temporary road surface of the manhole cover, remove the cover plate and the curing plate, and remove the manhole frame. The manhole cover and the periphery of the manhole cover are made to coincide with the height of the road surface (see, for example, Patent Documents 2 and 3).

In the above-mentioned known example, in the manhole cover location road surface that is temporarily installed, a part of the surface larger than the size of the manhole cover is partially cut to form a cut pavement plate, and it can be removed by manual subdivision using a tool. , Cast anchor bolts and use rope to remove lump of cut pavement board, or drill a hole in the center of the cut pavement board, and rope to the locking hole provided in the exposed cover plate Or a hook is engaged, and the lump of the cut pavement board is lifted together with the cover board and removed (see, for example, Patent Document 4).
Japanese Patent No. 3644949 Japanese Patent No. 2623491 Japanese Patent No. 2623492 Japanese Patent Laid-Open No. 11-172610

  As mentioned above, the lid plate and curing plate corresponding to the conventional iron cover have a circular, key-shaped hole in the center, and when the cut pavement plate (temporary pavement) is removed, it is placed at the bottom. A hook was attached to the hole in the center of the lid plate (iron plate), and the lid plate (iron cover) and the cut lump were removed at the same time. However, there are many types of iron covers such as lid plates that are actually used, and there is no commonality. Some types do not have a central hole, and the current lifting machine cannot handle all cover plates. In particular, the cutting overlay work is a repair work for the installation of manhole iron covers during road pavement work, a major road pavement company undertakes the entire work, and the iron cover removal process is performed by many other small and medium-sized pavement companies. There are many cases to perform, and there is an inconvenience that a cover plate (iron cover) cannot be specified.

  Furthermore, in the case of anchor bolts, there are inconveniences such as disconnection from the rope or high risk, such as when the load on the cut pavement plate itself is large or when the anchor bolts are not firmly attached, and problems at the work site are pointed out Has been.

  Therefore, there is a problem that workability is poor and efficient processing cannot be performed.

  The present invention has been made paying attention to the above points. A circular hole is formed in the center of the cut pavement plate at the temporary manhole cover, and an expansion locking tool is disposed in the circular hole. The expansion locking device is expanded outward to separate and separate from the lower surface of the center portion of the cut pavement plate and the lid plate or the curing plate, and at the same time is centered by the side plate of the expansion locking device. In paved road construction, supported by the peripheral edge of the hole and lifted by means of a rope or the like, the lightening and paving board can be removed and removed to the outside in a lightweight and safe manner. An object of the present invention is to provide a method for removing a temporary road surface of a manhole cover and an expansion locking device for removal that is small and light and can be easily carried by an operator.

  This invention can solve the said subject by providing the following structure.

(1) In the process of cutting an overlay or cutting overlay laid on a mandrel base wall, a cover plate provided temporarily on the manhole base wall or a curing plate provided above the manhole base wall with a gap, After forming through a cutting step of forming a cut pavement plate by cutting the outer periphery on the embedded lid plate or curing plate into a cylindrical shape and forming a central hole of the cylinder at the central location of the cut pavement plate, the formation Cut pavement with a locking claw inserted between the lid plate or the upper surface of the curing plate at the bottom of the center hole of the cut pavement plate by the expansion locking tool arranged in the center hole formed in the process separating plate, dissipate dehiscence, the paved road construction, characterized in that formed by the cutting pavement plate b-loop in a retaining ring provided on the expansion locking device engaged oN to allow removal traction Yuzurihaue How to remove manhole cover part temporary road surface.

(2) In the process of cutting an overlay or cutting overlay laid on a mandrel base wall, a cover plate provided temporarily on the manhole base wall, or a curing plate provided above the manhole base wall with a gap, After forming through a cutting step of forming a cut pavement plate by cutting the outer periphery on the embedded lid plate or curing plate into a cylindrical shape and forming a central hole of the cylinder at the central location of the cut pavement plate, the formation At the same time as engaging the locking claw between the upper surface of the lid plate or the curing plate at the peripheral bottom of the central hole of the cut pavement plate by the expansion locking tool disposed in the central hole formed in the process the locking claw separating cutting pavement plate by a this is brought into contact with the periphery of the side wall having a, dissipate dehiscence, cut b-loop in a retaining ring provided on the expansion locking device engaged entrance to Characterized by being able to remove the paving board on the towing rod Removing method of manhole cover places temporary road surface in the pavement road construction to be.

(3) (1) or (2) in an expansion locking device for use in removing method of the manhole cover portions temporary road surface according piston, a pair of right and left with a built-in telescopic mechanism consisting of a cylinder retaining ring And a locking claw having an acute cross section and a semicircular arc shape provided at the lower part of each side wall body, and a manual hydraulic jack is connected to the expansion and contraction mechanism in the left-right direction of the pair of side wall bodies. An expansion locking tool for removal, characterized in that it can be expanded and contracted.

  According to the present invention, a cover plate temporarily installed in place of a manhole cover such as a cutting overlay method or a pavement method, or a cover plate or a curing plate that temporarily shields an opening of a cover wall leading to the manhole is paved over the entire road. When removing the cut pavement plate obtained by cutting the manhole cover part temporary road surface on the road surface, the expansion locking tool for removal inserted in the center hole and disposed on the cover plate and the curing plate, By separating and separating from the cover plate and the curing plate by the expansion operation of the pair of semicircular side walls, the cut pavement plate can be lifted at the center position and removed to the outside, so that the shape of the cover plate and the curing plate can be Regardless of the type of lid plate and curing plate, it can be expanded and locked to ensure that it can be processed securely, so it is easy to operate and the expansion locking tool can be easily operated by a handle with a hydraulic pump. And because anyone can use it,械 can extremely reduce the work cost is unnecessary.

  Further, the expansion locking tool is inserted into the center hole by the expansion and contraction operation of the cylinder piston expansion mechanism, and is inserted between the lid plate or the curing plate and the cutting pavement plate by the locking claw, and the cutting pavement plate is placed around the center hole. Since it can be secured securely and can be lifted, removal and removal can be performed safely and quickly.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

  First, an embodiment of the removal and expansion locking tool used in the present invention will be described with reference to FIGS.

  The drawings will be described.

  Reference numerals 1 and 1 are a pair of left and right side wall bodies, and 2 and 2 are semi-arc shaped locking claws provided at the lower part of the side wall bodies 1 and 1, each having an acute cross section α. Numerals 3 and 3 are engageable rectangular housings provided on the side walls 1 and 1, which have opening portions 4 and 4, and an expansion / contraction mechanism comprising pistons 5 and cylinders 6 through both opening portions 4 and 4. 7 is stored. Reference numerals 8 and 8 denote arm plates protruding from the pair of casings 3 and 3 at the upper part of the pair of side wall bodies 1 and 1, respectively, and have holes 9 and 9 for locking hooks for inserting ropes or hanging. I'm leaning.

  Reference numeral 10 denotes a hydraulic pump having a manual operation handle 12 connected to the telescopic mechanism 7 and the hydraulic hose 11.

  Reference numerals 13 and 13 denote two tension springs arranged on both sides of the pair of side wall bodies 1 and 1, and four tension springs on both sides. When the acting force in the extension direction of the expansion / contraction mechanism 7 is released, the extension mechanism 13 is caused to contract by the restoring force of the tension springs 13 and 13.

  The Example about the removal method of the manhole cover location temporary road surface of this invention using the above-mentioned expansion locking tool A for removal is described below.

  FIG. 7 (a) shows that the manhole location temporary road surface is removed from the manhole cover and cover frame, and the temporary cover plate D is shielded from the opening C of the base wall B leading to the manhole in the process of paving work by the cutting overlay method. Place and fill the pavement material to the manhole installation surface, then cut the entire road surface, apply the overlay E, then cut the pavement with a flat circular arc cross section arc-shaped cutting line F around the lid plate D The state in which the board G is formed is shown.

7 (b) is in the cutting overlay construction method (a), provided with a curing plate D ₁ at a distance above the opening C of the base wall B, and the small amount of filling of the paving material to the manhole installation surface Te entire road subjected to cutting processing, after construction overlay E, it shows a state in which the cutting pavement plate G having a cutting line F of the plane circular and cross section an arcuate about the curing plate D ₁ is formed.

FIG. 7 (c), pavement construction method, i.e., shows an overlay construction example of the manhole portion temporary road surface when paving unpaved roads first cover plate D for temporary in the opening C of the group wall B , The pavement material is filled up to the manhole installation surface, and then the overlay E is constructed, and then a cut pavement plate G having a cutting line F with a circular plane and a cross-sectional arc shape is formed around the lid plate D. It shows the state.

Then, it indicated by the slope indicating the state where the center hole 14 with a drilling tool at the position of the cover plate D or curing plate D ₁ is perforated.

The size e of the central hole 14 must be set to a size e ₁ that allows the removal expanding locking tool A to be inserted.
e> e ₁

  In addition, before and after the drilling process of the center hole 14 and the process of the cutting line F of the cut pavement board G is not specified at all.

  7 (a), (b) and (c) above show the cutting process for forming the cut pavement board G according to the present invention and the process for forming the center hole 14 of the cut pavement board. The removal process which can be removed on the ridge by the expansion locking tool of a pavement board is shown.

Said the removal for expanding fastener A is inserted into the central hole 14 of the cutting pavement plate G is placed on the cover plate D or curing plate D _1.

  Then, the operator moves the oil in the hydraulic pump 10 up and down with the operation handle 12 of the hydraulic pump 10 so that the oil in the hydraulic pump 10 is supplied from the hydraulic hose 11 into the removal expansion locking tool A. The piston 5 of the telescopic mechanism 7 is slid into the cylinder 6 and the pair of side wall bodies 1 and 1 are expanded outward.

  Since the latching claws 2 and 2 having a semicircular arc shape with an acute cross section are provided below the pair of side wall bodies 1 and 1, the lid plate D is connected to the lower surface of the cut pavement plate G of the center hole 14. The cover plate D and the cut pavement plate G are separated, and the cut pavement plate G can be firmly supported.

After confirming such a state, the operator stops the operation of the hydraulic pump 10, maintains the engaged state with the cut pavement G by the removal expanding locking tool A, and the arm of the cut pavement G The rope H is passed through the holes 9 and 9 of the plates 8 and 8, the hooks are engaged and the cut pavement G is separated from the lid plate D by using a favorite traction tool, and the surface is lifted upward. It is to be removed outward.

  In the drawing, the side wall bodies 1 and 1 are not provided with an arc-shaped side plate that comes into contact with the inner peripheral wall of the center hole 14, but when this side plate is provided, the peripheral wall of the center hole 14 is held down, so that a clamping effect is obtained. It can be further increased (not shown).

  Then, after removing the cut pavement board G, the operator releases the hydraulic action on the hydraulic pump 10 so that the expansion mechanism 7 is moved back in the cylinder 6 by the contraction force of the tension springs 13, 13, and the housing The distance between the bodies 3 and 3 is also reduced and the current state is restored, and the locking claws 2 and 2 can be separated from the center hole 14 and separated and removed.

Although not shown in the figure, after the dredging, the cover plate D and the curing plate D1 on the base wall B are removed, and an adjustment frame or the like is arranged on the upper part of the base wall B so that the manhole frame is installed in accordance with the height of the road surface. Then, a pavement material or the like is filled in an annular recess on the outer periphery of the manhole frame, and a manhole cover is laid by the same construction method as before.

The perspective view which shows one Example of the locking tool for removal used for this invention construction method 1 is a partially cutaway side view of the main part of FIG. Plan view of FIG. Partially cutaway side view showing the operating state of FIG. Plan view of FIG. The perspective view which shows the whole decomposition | disassembly state (A), (b), (c) Sectional drawing which shows three examples of the cutting process of the cutting pavement of this invention construction method, and the formation process of a center hole (A), (b), (c) Process diagram of removal process for removing and removing cut pavement board

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side wall body 2 Locking claw 3 Housing | casing 4 Opening part 5 Piston 6 Cylinder 7 Telescopic mechanism 8 Arm plate 9 Hole 10 Hydraulic pump 11 Hydraulic hose 12 Operation handle 13 Pulling spring 14 Center hole alpha Cross-section acute angle A Removal extension Stopper B Base wall C Opening D Cover plate D ₁ Curing plate E Overlay F Cutting line G Cutting pavement plate H Rope

Claims (3)

In the process of cutting an overlay or cutting overlay laid on a mandrel base wall, a cover plate provided temporarily on the manhole base wall, or a curing plate provided above the manhole base wall with a gap, embedded in the paved road surface Formed in the forming step after passing through a cutting step of forming a cut pavement plate by cutting the outer periphery on the lid plate or the curing plate into a cylindrical shape, and a forming step of forming a cylindrical center hole in the central location of the cut pavement plate The pavement plate is separated by inserting a locking claw between the lid plate or the upper surface of the curing plate at the bottom of the center hole of the cut pavement plate by the expansion locking tool arranged in the center hole. , dissipate dehiscence, manhole cover locations in pavement construction, characterized by comprising the expansion fastener to a retaining ring cutting pavement plate b-loop engaged input to the provided to allow removal traction Yuzurihaue How to remove the temporary road surface. In the process of cutting the overlay or cutting the overlay is laid on the cover plate or curing plate on which is provided through the gap above the manhole group walls disposed in a manhole base wall temporarily, embedded in pavement Formed in the forming step after passing through a cutting step of forming a cut pavement plate by cutting the outer periphery on the lid plate or the curing plate into a cylindrical shape, and a forming step of forming a cylindrical center hole in the central location of the cut pavement plate The engaging claw is engaged with the upper surface of the lid plate or the curing plate at the bottom of the peripheral edge of the central hole of the cut pavement plate by the expansion locking tool disposed in the central hole. separating the cutting pavement plate by a this is brought into contact with the periphery of the side wall having a pawl, dissipate dehiscence, the cutting pavement plate b-loop in a retaining ring provided on the expansion locking device engaged entrance to Characterized by being able to be removed on the towing rod Removing method of manhole cover places temporary road surface in instrumentation road construction. An expansion locking tool for use in the method for removing a manhole cover portion temporary road surface according to claim 1 or 2, wherein the side wall body has a pair of left and right locking rings incorporating a telescopic mechanism comprising a piston and a cylinder, It consists of a locking claw with an acute cross section and a semicircular arc shape provided at the lower part of each side wall body, and a manual hydraulic jack is connected to the expansion and contraction mechanism so that the pair of side wall bodies can be expanded and contracted in the left-right direction. An expansion locking device for removal characterized by comprising the following.

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