EP0698688B1 - Machine for removing and breaking pavement - Google Patents

Machine for removing and breaking pavement Download PDF

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Publication number
EP0698688B1
EP0698688B1 EP19950305604 EP95305604A EP0698688B1 EP 0698688 B1 EP0698688 B1 EP 0698688B1 EP 19950305604 EP19950305604 EP 19950305604 EP 95305604 A EP95305604 A EP 95305604A EP 0698688 B1 EP0698688 B1 EP 0698688B1
Authority
EP
European Patent Office
Prior art keywords
breaking
lower jaw
pavement
jaw
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19950305604
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0698688A1 (en
Inventor
Nobuyuki Zakohji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ohyodo Diesel Co Ltd
Original Assignee
Ohyodo Diesel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ohyodo Diesel Co Ltd filed Critical Ohyodo Diesel Co Ltd
Publication of EP0698688A1 publication Critical patent/EP0698688A1/en
Application granted granted Critical
Publication of EP0698688B1 publication Critical patent/EP0698688B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/965—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of metal-cutting or concrete-crushing implements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
    • E01C23/122—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus

Definitions

  • This invention relates to a machine for removing and breaking pavement such as a layer of concrete or asphalt. More particularly, the invention relates to a machine for removing pavement of a road from the ground and breaking the same into small pieces.
  • a machine for removing and breaking pavement has been developed recently and is used for road repairing.
  • the machine is capable of removing a pavement from the roadbed and breaking it into small pieces.
  • Fig. 7 shows one example of such machines for removing and breaking pavement as disclosed, for example, in Japanese Patent Public Disclosure No. 05-339908 (KOKAI No. HEISEI 5-339908).
  • the machine includes a pivotable arm 4 pivotably connected to the forward end of a boom 3 of a working machine 2 extending therefrom for pivotable movement in the vertical direction.
  • the machine for removing and breaking pavement also includes an upper jaw 6 and a lower jaw 5 attached to the forward end of the pivotable arm 4 for open-close movement relative to one another.
  • the boom 3 may be pivoted in the vertical direction by means of a hydraulic cylinder 7.
  • the pivotable arm 4 may be pivoted in the front and rear direction by means of a hydraulic cylinder 8 attached to the boom 3.
  • the lower jaw 5 is pivotably connected at its rearward end, to the forward end of the pivotable arm 4 by means of a pin 9.
  • the rearward end of the lower jaw 5 is connected, through a linkage 11, to the forward end of a piston rod 10a of a hydraulic cylinder 10 attached to the pivotable arm 4.
  • the lower jaw 5 is moved by the hydraulic cylinder 10 about the pin 9 in the vertical direction.
  • the upper jaw 6 is connected, at its rearward end, to the substantially mid-point of the lower jaw 5 by means of a pin 12.
  • the upper jaw 6 is disposed opposite to the forward end portion of the lower jaw 5 for pivotable movement (open-close movement) about the pin 12.
  • the open-close movement of the upper jaw 6 relative to the lower jaw 5 is caused by a hydraulic cylinder 13 disposed between the upper jaw 6 and the lower jaw 5.
  • the lower jaw 5 includes a removing pawl 14, having sharp tip, at the forward end thereof, and a receiving bore 15 adjacent to the forward end thereof, as shown in Fig. 8.
  • the upper jaw 6 includes a breaking blade 16 in the lower surface thereof. The breaking blade 16 is disposed opposite to the receiving bore 15 of the lower jaw 5 so as to be fitted into the receiving bore 15.
  • the machine for removing and breaking pavement is adapted to cause the removing pawl 14, having a sharp tip, at the forward end of the lower jaw 5 to be urged against the surface of a pavement, or to cause the upper jaw 6 and the lower jaw 5 to clamp a torn-up end of the pavement therebetween, so as to break the pavement into pieces.
  • This is accomplished by appropriately driving the hydraulic cylinder 10 for actuating the upper jaw 6 and the lower jaw 5 at the forward end of the pivotable arm 4 in the vertical direction, or by appropriately driving the hydraulic cylinder 13 for actuating the upper jaw 6 to be openably closed.
  • the removing pawl 14, having a sharp tip, at the forward end of the lower jaw 5 is forcibly inserted between the pavement a and the roadbed b for performing pavement tearing-up operation, as shown in Fig. 9 (a) to (c).
  • the torn-up end c of the pavement a may be clamped between the upper jaw 6 and the lower jaw 5, as shown in Fig. 9 (d).
  • the torn-up end c of the pavement a as clamped between the upper jaw 6 and the lower jaw 5 may be broken into pieces (breaking operation), as shown in Fig. 7.
  • the machine for removing and breaking pavement 1 includes the single removing pawl 14, having a sharp tip, at the forward end of the lower jaw 5.
  • the forward end of the removing pawl has a width of about 400 mm.
  • Such machine is suitable to be used in an operation for removing a portion of the pavement, for example, when replacing electric poles. It is noted, however, that such machine is not suitable for road repairing operation in which the entire pavement is repaired for the reason below.
  • the portion of the pavement is only reduced, in its width, to at most one-half to one-third. Accordingly, when the pavement, for example of concrete, having been torn up from the roadbed and broken into pieces is loaded into a dump truck, the pieces of pavement present a relatively large space or void (i. e.. low bulk density). This prevents a dump truck to be loaded to a full load capacity. It is therefore necessary for the pieces of pavement c to be crushed by the machine in plural stages or crushed by a separate apparatus for breaking concrete material.
  • the lower jaw 5 has a bottom surface of a curved configuration. This causes the forward end of the removing pawl 14 to be lifted from the surface of the roadbed by the amount of m (Fig. 8) and is not fixed at a certain height. Thus, it is difficult for the removing pawl 14 to be inserted between the pavement and the roadbet in a horizontal direction.
  • the removing pawl 14, having a sharp tip, of the lower jaw 5 and the breaking blade 16 of the upper jaw 6 tend to be worn out during use. They must be severed or cut by means of a welding machine for replacement with new ones. This requires cumbersome procedures.
  • a machine for removing and breaking pavement comprising a lower jaw connected, by means of a pin, to the forward end of an arm extending from a working machine for movement in a vertical plane, the lower jaw including a plurality of removing pawls at the forward end thereof, and plural rows of breaking bores adjacent to the forward end thereof; an upper jaw connected, by means of a pin, to the lower jaw so as to be moved toward and away from the lower jaw; the upper jaw including plural rows of breaking blades arranged in opposed relationship with the respective rows of breaking bores; a first cylinder connected between the lower jaw and the arm so as to cause the upper jaw, together with the lower jaw, to be pivoted in a vertical plane; and a second cylinder for causing the upper jaw to be pivoted relative to the lower jaw; whereby a pavement material may be clamped between the upper jaw and the lower jaw and broken into
  • the invention is characterised in that a first row of breaking bores are formed between the removing pawls, a second row of breaking bores are formed between a central partition wall and two opposing side partition walls, the central partition wall has a protrusion having an upper surface which is raised upwardly relative to the upper surfaces of the side partition walls.
  • the forward end portion of the lower jaw has a substantially flattened lower surface.
  • the removing pawls are removably connected to the forward end portion of the lower jaw.
  • the plurality of breaking blades are adapted to be connected, at their base portions, to the upper jaw by means of bolts.
  • a pavement material removed from a roadbed is flexed and broken into pieces of a predetermined size by means of the co-operating plural breaking bores and plural breaking blades.
  • the forward end portions of the removing pawls are prevented from moving upwardly from the roadbed when they are urged against the surface of the roadbed in order to remove the pavement from the roadbed, since the lower surface of the forward end portion of the lower jaw is flattened. This permits uniform removal of the pavement.
  • the removing pawls of the lower jaw and the breaking blades of the upper jaw upon wearing thereof may be easily replaced with new ones, without relying upon a welding machine.
  • a machine for removing and breaking pavement 17 includes an upper jaw 19 and a lower jaw 18 connected to the forward end of the pivotable arm 4 of the working machine 2 shown in Fig. 17.
  • the upper jaw 19 and the lower jaw 18 are connected, by means of a pin, so as to be pivoted relative to one another (open-close movement).
  • a mechanism for driving the upper jaw 19 and the lower jaw 18 in the vertical direction is similar to that of the machine for removing and breaking pavement 1 shown in Fig. 7.
  • the components the same as those of the machine of Fig. 7 are designated by the same reference numerals.
  • the lower jaw 18 is pivotably connected to the forward end of the pivotable arm 4 by means of a pin 9.
  • the lower jaw 18 is pivoted, in a vertical plane, by means of a hydraulic cylinder 10 attached, one end thereof, to the pivotable arm 4, and a linkage 11.
  • the upper jaw 19 is connected, at its rearward end, to the lower jaw 18 at the mid-point thereof by means of a pin 12, so as to be pivoted in a vertical plane.
  • the vertically pivotable movement (open-close movement) of the upper jaw 19 is performed by a hydraulic cylinder 13 connected between the upper jaw 19 and the lower jaw 18.
  • the machine for removing and breaking pavement 17 according to the invention is basically different from the prior art machine for removing and breaking pavement 1 by the construction of the upper jaw 19 and the lower jaw 18 attached to forward end of the pivotable arm 4.
  • the lower jaw 18 includes a plurality of removing blades (three removing blades in the illustrated embodiment) 20, having a sharp tip, at the forward end thereof.
  • the removing blades 20 are arranged in parallel and spaced a predetermined distance from one another.
  • the lower jaw 18 also includes plural rows of breaking bores (two rows of breaking bores in the illustrated embodiment) 21 of a predetermined size. The forward end of each of the rows of breaking bores 21 are opened.
  • the removing blades 20 are integrally attached to the forward end of a grating body 23 consisting of partition walls 22 arranged in a latticed fashion. Two rows of breaking bores 21 of a rectangular configuration are formed between the three rows of removing blades 20 and the partition walls 22 and extend therethrough in the vertical direction.
  • the central partition wall 22a extending in the forward and rearward direction has a rearward end portion having a thickness slightly larger than that of the opposite partition walls 22b.
  • the rearward end portion of the central partition wall 22a has, in the upper surface thereof, a protrusion 24 having an upper surface raised upwardly relative to the upper surface of the opposite partition walls 22b.
  • the grating body 23 has a flat lower surface.
  • the grating body 23 is disposed between a pair of left-hand and right hand side plates 25 partly constituting the lower jaw 18 and integrally attached to them at the forward end portions thereof.
  • the lower surface of the forward end portion of the lower jaw 18 is flat and flushed with the lower surface of the grating body 23.
  • the lower surface of the rearward end portion of the lower jaw 18 is curved upwardly in L-shaped configuration.
  • the upper jaw 19 includes, in the lower surface thereof, breaking blades 26 disposed oppositely to the respective breaking bores 21.
  • the breaking blades 26 are formed by a pair of blade plates 28 welded to a plate member 27 and arranged in parallel relationship with each other. Specifically, the breaking blades 26 are formed by three peaks of each of the blade plates 28.
  • the plate member 28 is secured to the lower surface of the upper jaw 19 by means of screw means.
  • the machine for separating and breaking pavement 17 is adapted to remove a pavement material from a roadbed and to break the pavement material into pieces when the upper jaw 19 and the lower jaw 18 are appropriately raised or lowered and/or opened or closed by the actuation of the hydraulic cylinder 10 for moving the lower jaw in the vertical direction and the hydraulic cylinder 13 for moving the upper jaw in the vertical direction in a manner similar to that shown in Fig. 9.
  • the hydraulic cylinder 10 when the hydraulic cylinder 10 is actuated to cause the lower jaw 18 to be pivoted about the pin 9, the lower jaw 18 is rotated about the rearward end thereof as a supporting point O in the direction indicated by the solid line, as shown in Fig. 2. This causes the removing pawls 20 at the forward end of the lower jaw 18 to be raised by an angle of theta degrees. By this, a portion c of the pavement material is separated from the remaining portion of the pavement in a manner similar to that shown in Fig. 9 (c). Then, the hydraulic cylinder 10 is actuated in the opposite direction so as to cause the lower jaw 18 to be pivoted about the rearward end thereof as a supporting point O, as shown by the dotted line in Fig. 2, to the original horizontal position.
  • each of the removing blades 20 will not be raised upwardly from the upper surface of the roadbed, since the lower surface of the lower jaw 18 is flat.
  • the pavement material will be removed from the roadbed in a flat state.
  • the hydraulic cylinder 18 When it is intended to break the pavement material c having been removed from the roadbed, the hydraulic cylinder 18 is actuated so as to cause the upper jaw 19 to be pivoted about the pin 12, as shown in Fig 3. Thus, the pavement material c (not shown) is clamped between the upper jaw 19 and the lower jaw 18.
  • the hydraulic cylinder 13 is further actuated so as to move the upper jaw 19 toward the lower jaw 18.
  • the plural rows of breaking blades 26 of the upper jaw 19 are fitted into the respective one of the plural rows of breaking bores 21.
  • the pavement material c is broken at plural points into small pieces of pavement material d.
  • the pavement material c is first broken by the protrusion 24, to which breaking force is centralized, formed in the central partition wall 22a of the lower jaw 18. Then, the pavement material c is broken into small pieces by means of the breaking blades 26.
  • Fig. 4 shows an alternative embodiment of the breaking blades 26 to he attached to the lower surface of the upper jaw 19.
  • the breaking blades 30 of this embodiment are arranged on a plate member 27 in plural rows so as to correspond to the respective rows of breaking bores 21 of the lower jaw 18.
  • the plate member 28 is adapted to be removably connected to the upper jaw 19 by means of screws.
  • Each of the breaking blades 30 includes, as shown in Fig. 5, a conical member 31 having round tapered end, and bolt 32 by which the breaking blade 30 is threadingly connected to the plate member 27.
  • the breaking blades 30, when worn out during road repairing operation, may be replaced with new ones by releasing or unscrewing the respective bolts 32 and removing them from the plate member 27.
  • Fig. 6 shows another embodiment of the removing blades 20 to be disposed at the forward end of the lower jaw 18.
  • the removing blades 33 of this embodiment is of a triangular hollow configuration. This configuration permits the removing blades 33 to be replaceably attached to the forward ends of the grating body 23.
  • the removing blade 33 includes a pawl body 34, having a sharp tip, and a mount portion 35 attached to the rearward end of the pawl body 34.
  • a bolt hole 36 is formed in the mount portion 35.
  • the mount portion 35 of the removing blade 33 is adapted to be tightly fitted over the forward end of the grating body 23 and to it by means of a bolt to threaded into the bolt hole 36.
  • the removing blade 33 upon worn out, may be easily replaced with new one.
  • the upper jaw 19 and the lower jaw 18 are connected to pivotable arm 4 of the working machine 2. It is noted, however. that, when the machine according to the invention Is only used to remove a pavement from the roadbed and resulting pieces of pavement material are treated by a shovel car, it is unnecessary for the arm to be pivoted. In such a case, the upper jaw 19 and the lower jaw 18 may be directly connected to the boom 3 of the working machine 2.
  • a pavement material may be clamped between the plural rows of breaking blades of the upper jaw and the plural rows of breaking bores of the lower jaw and broken into pieces.
  • the pavement material may be broken into small pieces by a single open-close operation of the jaws.
  • Such small pieces have a relatively high bulk density, so that they may be loaded into a truck to its full loading capacity.
  • the machine of the invention also permits easy replacement of the removing blades and breaking blades.
  • the machine of the invention also permits a pavement to be uniformly removed from a roadbed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Road Repair (AREA)
  • Working Measures On Existing Buildindgs (AREA)
EP19950305604 1994-08-11 1995-08-11 Machine for removing and breaking pavement Expired - Lifetime EP0698688B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP189400/94 1994-08-11
JP6189400A JP3057673B2 (ja) 1994-08-11 1994-08-11 舗装剥離破砕機

Publications (2)

Publication Number Publication Date
EP0698688A1 EP0698688A1 (en) 1996-02-28
EP0698688B1 true EP0698688B1 (en) 1999-05-26

Family

ID=16240662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950305604 Expired - Lifetime EP0698688B1 (en) 1994-08-11 1995-08-11 Machine for removing and breaking pavement

Country Status (3)

Country Link
EP (1) EP0698688B1 (ja)
JP (1) JP3057673B2 (ja)
DE (1) DE69509840T2 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100488169B1 (ko) * 2002-06-12 2005-05-11 주식회사수산중공업 도로 파쇄기
KR101940154B1 (ko) * 2016-12-12 2019-01-18 주식회사 드림트리 도로 포장재 파쇄장치
CN113510739A (zh) * 2021-06-10 2021-10-19 江苏金茂制链有限公司 一种用于环链加工的机器人多用夹爪

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5962963A (ja) * 1982-09-30 1984-04-10 Toshiba Corp 電子計算機
JPS6128839U (ja) * 1984-07-25 1986-02-21 松下電工株式会社 浴室ユニツトの点検口部の構造
US4932478A (en) * 1988-08-22 1990-06-12 Esco Corporation Tooth point for earth working
JP2540210B2 (ja) * 1989-06-19 1996-10-02 株式会社坂戸工作所 破砕機
NL8901542A (nl) * 1989-06-20 1991-01-16 Verachtert Beheer Bv Inrichting voor het stukmaken van uit beton of dergelijk materiaal bestaande voorwerpen.
BE1004775A6 (fr) * 1991-04-10 1993-01-26 Labounty Mfg Inc Broyeur mobile lourd de dalles de beton.
JPH05339908A (ja) 1992-06-11 1993-12-21 Ooyodo Diesel Kk コンクリート剥離機
JPH0657970A (ja) * 1992-08-10 1994-03-01 Ooyodo Diesel Kk コンクリート破砕機

Also Published As

Publication number Publication date
DE69509840T2 (de) 1999-11-25
JPH0853811A (ja) 1996-02-27
JP3057673B2 (ja) 2000-07-04
EP0698688A1 (en) 1996-02-28
DE69509840D1 (de) 1999-07-01

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