JP4603093B2 - Removal lifter and removal lift method for manhole road surface removal - Google Patents

Description

The present invention relates to a removal lifter and a removal lift method for removing a road surface cut and removed manhole used for manhole cover replacement construction.

  Generally, when replacing and replacing manhole covers and manhole cover frames, or when replacing manhole covers and manhole cover frames when repairing pavement surfaces such as asphalt, the manhole cover frame and the surrounding pavement surface In a state where a part is integrated, it is removed as one lump.

  When using a cylindrical cutter, the cut surface is cylindrical on the road surface, so to remove it, it must be lifted vertically, and in many cases, anchor bolts or stoppers are driven around These bolts and stoppers were lifted using a powerful lifting machine (see, for example, Patent Document 1).

  On the other hand, recently, when an arcuate or curved cutter is used, the hoisting means may be in the upper preferred direction, and the arcuate or curved cutter is cut to near the lower housing of the manhole. Therefore, the arc-shaped (doughnut-shaped) lump may be lifted by using a pull-up rope by hanging on a part of the manhole hole in many cases because there are few uncut parts with the road. (For example, refer to Patent Document 2).

In addition, the former manhole cover frame having the cylindrical cut portion and the road surface are integrally formed in a cylindrical shape, whereas the latter is a so-called donut shape having a three-dimensional spherical shape. The advantage of the force is that the former requires a large pulling device, while the latter requires a small pulling device.
JP 2000-144773 A JP 2004-68596 A

  By the way, according to the literatures 1 and 2 described above, in the case where the cutting under the road surface is not performed at all in the literature 1, the use of the lifting means increases the load abnormally and increases the large size. The machine cannot be lifted, and the manhole cover frame and the removal of the road surface portion need to be cut in the horizontal direction. Therefore, the removal work requires more labor than necessary, and the workability is extremely poor. In Document 2, the weight of the removed object is small because it is a small round sphere, but it has a non-cutting portion on the road surface. There is a problem that it requires a considerable amount of uplifting force.

The present invention has been made paying attention to the above points, and in Reference 2, a non-cut surface portion under the road surface for peeling is removed as a circular spherical surface composed of a manhole cover frame and its surrounding road surface. Removal lifts and removal lifts for manholes that cut and remove manholes that allow objects to be easily moved and peeled off, allowing the removed objects to be simply discarded to be removed with a lifting force of weight. The purpose is to provide a method of construction .

In addition, the present invention does not have a manhole cover frame that is formed in an annular shape having a solid circular cut surface including a manhole cover frame, such as a pavement method, an overlay method, and a cutting overlay method that are conventionally known. The removal lifter and removal lift method for the removal of the manhole's road surface cutting and removal so that the removal of other annular removal objects having a solid spherical cut surface and the lifting operation can be performed easily and easily. The purpose is to provide.

  The present invention can solve the above problems by including the following configuration.

(1) Using an arc-shaped or curved cutter, rotate 360 degrees around the manhole to cut the road surface around the manhole, and lift the ring-shaped removal object having a planar circular and three-dimensional spherical cutting surface The lifter is a lifter for removing the auxiliary hooking piece that engages with the inside of the manhole, the sliding inner / outer double vertical load-bearing pipe, and the inner part of the manhole inside the pipe. A manhole road surface comprising a horizontally extending cylinder and a piston rod for extending and retracting an extending claw to hang, and a pair of hooking holes provided in the upper part of the double pipe. Removal lifter for cutting removal.

(2) Using a circular or curved cutter, the road surface around the manhole cover frame is rotated 360 degrees around the center of the manhole, and the road surface around the manhole cover frame is cut into a ring-shaped removal object having a flat circular and solid spherical cutting surface. A process of making the auxiliary latching piece face the inside of the manhole, and a process of locking the cylinder and the piston rod in the vertical direction, protecting the cylinder and the piston rod, and a locking process of the cylinder extending and retracting in the horizontal direction to the locking part. A lifting method for removing and removing manholes from road surface cuts, characterized by comprising a lifting step by means of lifting by means of a double pipe that can be extended and slidably provided with a load bearing capacity.

  According to the present invention, the periphery of the manhole cover frame is subjected to a circular and spherical cutting process using an arcuate or curved cutter, and then the rod-like main body is placed on the upper part and hung along the slot. After moving the stopper piece, position the tip of this hooking piece directly on the inside of the manhole cover frame or through the auxiliary hooking piece with the extension pawl at the hookable position. In addition, a lifting means such as a hand jack is interposed between the hooking portion for lifting the edge and the road surface, and the rod-like main body is inclined with respect to the horizontal road surface by operating the lifting means. Thus, the uncut portion of the annular removed product can be easily peeled off by the lever principle to be tilted. That is, not only the upward pulling force but also the sliding action on the cut surface in the lateral direction is applied to the rod-shaped main body, so that the force is dispersed and the acting force with a relatively small lifting force is applied. Since the joint surface is peeled to form one lump, the cut surface that has already been cut by the cutter and the uncut portion are connected to each other, and are completely separated from the ground as a donut-shaped removed product of one lump. Therefore, this one lump can be lifted by a lifting force corresponding to the gravity of one removed object using a hanging string such as a rope, and can be removed with a small pulling force as a whole.

  In addition, the lump-like removed object can be efficiently operated with a light and small lifting machine such that it can be lifted while sliding along the arcuate concave surface of the cut road surface.

  Furthermore, according to the present invention, not only for an annular removed object having a plane circular and three-dimensional spherical cut surface including an initial manhole cover frame in a paving method, an overlay method, a cutting overlay method, etc., an intermediate process This can be similarly applied to the disposal of other annular removal products of the same shape without the manhole cover frame.

(A) is a side view of the whole unused state, (b) is a plan view of (a), and the two-dot chain diagram shown in each figure shows the outline of the road surface and the manhole cover frame in the used state. (A) is a top view of an auxiliary | assistant latching piece, (b) is the side view, and all have illustrated and added the latching relationship of the latching part of a latching piece. Side view showing the other side when the auxiliary hooking piece is not used It is sectional drawing which shows the state in which the lump removal thing at the time of making a lifting means work is inclined, Comprising: (a) is sectional drawing which shows the state which lifts the removal object using a ring, (b) is sling Sectional view showing the state of pulling through the belt Partial sectional side view of auxiliary latching piece showing another embodiment FIG. 6 is a plan view of FIG. VII-VII line longitudinal sectional view of FIG. The cross-sectional explanatory drawing at the time of using for a cutting overlay method is shown, (a) shows the case where an intermediate material is interposed in a curing plate, (b) shows the case where a curing plate is provided directly on the lower casing. (A), (b) is sectional explanatory drawing of the construction process of the cutting overlay method shown in FIG. (A), (b) is sectional explanatory drawing of the construction process of the cutting overlay method shown in FIG.

DESCRIPTION OF SYMBOLS 1 Bar-shaped main body 2 Groove hole 3 Latching piece 4 Elongation nail | claw 5,5A Auxiliary latching piece 5a Hydraulic pipe 5b Hydraulic cylinder 5c Guide pipe rod 5d Piston rod 5e, 5f Inner and outer double large and small pipes 6 Hooking hole 6a Frame part 7 Locking portion 8 Screw portion 9 Handle 10 Locking ring 11 Stopping plate 12 Locking portion 13 Lifting means 14 Locking ring 15 Pulley 16 Shaft 17 Support plate 18 Suspension bolt 18a Claw portion 19 Screwing portion 20 Screw body 21 Suspension ring Part 22 Lower casing 23 Intermediate material 24a, 24b Curing plate (medium pad)
25 Filled material 26 Pavement road surface 27 Small hole 28 Locking hole B, B1 Removed object C Cut surface Cx Uncut portion H Manhole hole K Latch point L Road surface M Manhole cover frame R Rope X Cutting line

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

  Embodiments of the present invention will be described below with reference to FIGS.

  1 is a rod rod-shaped main body formed of a desired metal material, 2 is a groove hole formed in the vertical direction along the center line of the rod rod-shaped main body 1, and 3 is inserted in the groove hole 2 in the vertical direction. One or more latching pieces that are freely movable, and two are provided in the drawing.

  The hooking piece 3 has a bolt structure, and a hooking hole 6 of the auxiliary hooking piece 5 having a pair of left and right extending claws 4 and 4 mounted on the inner wall of the manhole hole H at the lower end thereof. And a latching portion 7 that can be detachably latched, and can be securely latched with the auxiliary latching piece 5 engaged with a desired latching location K of the manhole hole H (FIG. 2). (See (a) and (b)). The auxiliary hooking piece 5 is extended by a pair of extending claws 4 and 4 guided by a guide pipe rod 5c by a hydraulic pipe 5a from a hydraulic pump, for example, by the action of a hydraulic cylinder 5b. It is possible to latch and fix the latching point K on the inner wall of the manhole hole H.

  Moreover, the latching piece 3 can also be latched directly with the said latching location K by forming the latching part 7 of the lower end in hook shape (refer FIG. 3). Next, a screw portion 8 is engraved on the upper end, and a stop ring 10 having a handle 9 is screwed together, and a stop plate 11 such as a washer that can be hooked with the slot 2 is provided. Further, although not shown, the latching portion 7 can be used by being latched to a handle-like retaining ring portion provided on the inner surface of the manhole cover frame.

  Reference numeral 12 denotes a hooking portion projecting from one end of the rod rod-shaped main body 1 and can interpose a lifting means 13 placed on the surface of the road surface L. In the figure, a small hand-jack type jack is shown, but a foot-type jack or the like can be used. 14 is a retaining ring for bundling hanging ropes provided on both sides of the rod-like main body 1, 15 is a pulley that can roll on the road surface for carrying the rod-like main body 1, 16 is a shaft of this pulley 15, 17 Indicates a support plate provided on the shaft 16.

  The operation will be described below.

  First, the manhole cover frame M supporting the manhole cover M and the road surface L around the manhole cover frame M are rotated 360 degrees in advance around the center of the manhole using a circular or curved cutter, The road surface is formed by forming a cut surface C having a flat circular shape and a three-dimensionally concave or convex curved surface. Between the cut surface C and the lower casing 22 of the manhole hole H, there is a slight uncut portion Cx. The uncut portion Cx is formed in an annular shape along the inner circumferential direction of the cut surface C. When the cutting process by such a cutter is completed, the auxiliary hooking piece 5 is fixed to the hooking point K on the inner wall of the manhole hole H by engaging the left and right extending claws 4 and 4. Next, the rod-like main body 1 is disposed at a substantially central position on the manhole cover frame M.

  Then, after the latching portions 7 and 7 of the two latching pieces 3 and 3 of the rod-shaped main body 1 are securely latched with the latching holes 6 and 6, they are screwed into the upper portions of the latching pieces 3 and 3. Using the handle 9, the set screw ring 10 is securely hooked.

  Next, a jacking-up jack lifting means 13 is interposed between the latching portion 12 provided at the end of the rod-like main body 1 and the road surface L, and the height of the jack is manually increased by an operator. The uncut portion Cx of the lump-shaped removal material B of one arm-curved donut structure composed of the manhole cover frame M and the surrounding road surface cut by the cutting plane C is slid and cut by the action of a jack. Thus, the removal object B on the jack side can be lifted up while being inclined along the curved cut surface C with the side opposite to the jack as a fulcrum.

  In this state, as shown in FIG. 4A, the rope R is similarly bound to the retaining ring 14 of the rod rod-shaped main body 1 and mechanically lifted by the lifting force corresponding to the weight of the removed object B. Can be removed externally.

  Further, as shown in FIG. 4B, the sling belt V is inserted and wound using the gap G of the cut surface C, the rod rod-shaped main body 1 placed thereon is removed, and then the belt V is attached. The removal object B can be lifted and removed by a lifting force corresponding to the weight of the removal object B.

  Although not shown, after the uncut portion Cx is cut, removal of the lump removal product B on the soot can be performed by a favorite operation.

  Although one embodiment of the present invention has been described above, the hooking piece 3 is not provided with the auxiliary hooking piece 5, and a hook-like hooking portion 7 is provided at the lower end of the manhole hole as shown in FIG. Engage securely in the hooking point K of H, fix the upper part of the hooking piece 3, and tilt the doughnut-shaped lump removal material B by the lifting means 13 as described above to uncut part Cx can be stripped. Further, when a handle-like frame provided on the inner wall of a recent manhole cover frame is provided, a hooking portion 7 of the hooking piece 3 is formed in a hook shape on this frame and fixed by being hooked. Can also be implemented.

  By the way, the manhole cover is typically 600 mm, 750 mm, 900 mm, etc., but the diameter varies depending on the installation location. Therefore, the weight of the removed material B to be discarded also varies depending on the size. For small manholes, one retaining piece 3 is sufficient, but for large manholes with a long diameter, it is preferable to use two retaining pieces 3 in consideration of safety.

  In addition, as shown in FIG. 3, when using the two latching pieces 3 directly, without using the auxiliary latching piece 5, although not shown in figure, between both hook-shaped latching parts 7 and 7 is shown. An interval holding body can be provided to prevent accidental detachment during work.

  Further, the hoisting means 13 can also be remotely controlled by hydraulic pressure or the like in addition to those of the hand-held type or the foot type shown in the figure.

  Moreover, the small hoisting means 13, that is, a hand-jacketed jack, is placed on the rod-like main body 1 and can be freely carried using the pulley 15 integrally with the rod-like main body 1.

  The lifting means 13 can be applied not only to flat roads but also to manhole repairs when repairing roads provided on slopes.

  Although the present invention does not show a case where a bolt is implanted in the lid frame of the manhole cover, in this case, it is a matter of course that the bolt is cut and placed in advance by an arbitrary cutter device from the manhole hole side.

  Next, still another embodiment of the present invention will be described with reference to FIGS.

  This embodiment is a modification of the auxiliary hooking piece 5 of the above embodiment.

  A hydraulic cylinder 5b and a piston rod 5d of a hydraulic pipe 5a operated by a hydraulic pump or the like are held by strong and small pipes 5e and 5f having a square cross section and sliding relative to each other, and the hydraulic cylinder 5b and the piston rod 5d are exclusively used. Only the extension and contraction of the horizontal extension claws 4 and 4 are used, and the load for lifting the manhole removal B is borne exclusively by the square inner and outer double pipes 5e and 5f, and the roles are divided. The configuration is different from the above-described embodiment.

  In addition, the latching piece 3 provided with the latching portion 7 engaged with and latched with the latching hole 6 has the same configuration as that of the above-described embodiment, and the lifting operation using the same rod rod-shaped main body 1 is exactly the same. Can be implemented. The hooking hole 6 is formed by providing a frame portion 6a on square inner and outer double pipes 5e and 5f.

  In this embodiment, the point that the suspension bolts 18 shown in FIG.

  That is, the suspension bolt 18 has a claw portion 18 a that can be engaged with the pair of hook holes 6 at the lower end, a screw portion 19, and a screw body 20 having a knob that is screwed with the screw portion 19. In the configuration, the suspension ring portion 21 is provided at the top.

  When the suspension bolt 18 can be directly locked to the auxiliary hooking piece 5A locked to the removed object B and directly lifted, the use of the rod-like main body 1 can be omitted.

  In short, in the second embodiment, the locking force on the inner wall side of the manhole cover acting in the horizontal direction is exclusively applied to the hydraulic cylinder 5b and the piston rod 5d having a weak structural strength, and is strong against a large removed object such as a kite. Since the force is distributed by causing the square pipes 5e and 5f to disperse, the removal object can be removed smoothly without difficulty.

  Although the embodiment of the present invention has been described above, the rod-like main body 1 is formed by simply cutting the road surface at the periphery of the existing manhole cover frame into an annular shape and removing the lump of a doughnut-shaped donut structure. As shown in FIG. 8 (a), (b) to FIG. 10 (a), (b), in addition to using B only for locking and launching by using the latch piece 3, and removing it. For example, the spherical cut surface C after removal of the removed object B in the cutting overlay method proposed by the present inventor in Japanese Patent No. 3644949 is interposed directly on the lower housing 22 or via another intermediate material 23. A second structure comprising a filling 25 embedded in the cured plates (medium pad) 24a, 24b, and a new road surface 26 which is cut along the cutting line X along the old road surface around the manhole and paved on the top. The removed object B1 is also manhole-shaped using a circular or curved cutter. Center substantially aligned with the cutting portion of the first time around the can be formed by cutting a new road that is preliminarily embedded in a rotated with the manhole cover frame 360 degrees. In this case, the center position of the manhole can be marked in advance and the center position of the cutter for cutting the new paved road surface 26 can be easily known.

  Then, the core boring machine is made to face the central position of the removed object B1, and a small hole 27 is formed to expose a locking hole 28 provided in advance on the curing plate 24 (see FIGS. 9A and 9B). ). In FIG. 9 (a), the small hole 27 is at one central position, but the small holes communicating with the two locking holes 28 on the left and right sides may be similarly cut out with a core boring machine and provided at three positions. Yes (not shown). Then, the removal object B1 can be removed by using the rod-shaped main body 1 through the hooking piece 3 using the two or three locking holes 28.

  In this state, the rod rod-shaped main body 1 is arranged at the center of the second removed object B1, the hooking piece 3 faces the center of the slot 2, and the hooking portion 7 provided at the lower end of the hooking piece 3 is used. Is engaged with the curing plates 24a and 24b, and the retaining ring 10 that is engaged with the threaded portion 8 at the upper end of the retaining piece 3 is rotated to firmly fix the retaining piece 3 to the rod-shaped main body 1. Thus, the second removal object B1 can be removed in the same manner as described above by the tilting lift process by the lifting means 13 and the lifting means by the rope using the retaining ring 14.

  Furthermore, according to the present invention, an annular donut-shaped cutout in which a manhole portion is cut by an arc-shaped or curved cutter after overlay processing in another method shown in Japanese Patent No. 3644949, that is, an overlay method, is provided. The same construction can be applied to the removal and removal of the same donut-shaped removed material in the paving method.

  Next, the latching portion 12 provided on one side of the rod rod-shaped main body 1 shown and illustrated in each embodiment is configured to protrude outward, but is recessed inward rather than outward. Similarly, the removal objects B and B1 can be tilted up using a jack with a claw as a hooking portion.

Claims (2)

Using a circular or curved cutter, rotate 360 degrees around the manhole to cut the road surface around the manhole, and lift up an annular removal object having a planar circular and three-dimensional spherical cutting surface. This lifter is used to remove the auxiliary hanging piece that engages with the inside of the manhole, and slides the inner and outer double load-bearing pipes in the vertical direction, and hooks the necessary parts inside the manhole inside this pipe. A manhole road surface cut and removed product comprising a horizontally extending cylinder and a piston rod for extending and adjusting the extension pawl, and a pair of hook holes provided on the upper part of the double pipe. Removal lifter . Using a circular or curved cutter to rotate 360 degrees around the center of the manhole to cut the road surface around the manhole cover frame into an annular removal object having a planar circular solid spherical cutting surface; With the auxiliary latching piece facing the inside of the manhole , the process of locking the cylinder extending and retracting in the horizontal direction and the extension pawl to the locking point by the piston rod, protecting the cylinder and the piston rod, the load resistance in the vertical direction A lifting lift method for removing and removing manholes from a road surface, characterized by comprising: a lifting step by a lifting means by means of a telescopic slidable inner / outer double pipe.

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