JP3228483U - Asphalt cutting non-land layer peeling fan blade device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an asphalt having good bite to an asphalt layer, easy peeling work, slow edge wear, no unpeeled residue, a good peeled surface, and a shortening of working time. Provided is a peeling fan blade device for a cutting asphalt layer. SOLUTION: A wedge-shaped coupler 10b fitted into a plurality of tooth 9s provided in a comb shape at the tip of a bucket 6 so as to cover the tooth 9 in the thickness direction is curved according to the inclination of the tooth 9. A scraper (peeling blade) 10 having a fan blade portion 10a inclined with respect to the asphalt cutting non-land layer is attached to the edge made of special steel and having a rectangular outer shape at the tip. [Selection diagram] Fig. 2

Description

The present invention relates to a peeling fang blade device for scraping and peeling off an unlanded layer after asphalt cutting on a road pavement surface, and more specifically, to a peeling fang blade device used by attaching to a bucket tooth of a power shovel. is there.

In the renovation work of the road pavement surface based on the request for deterioration and improvement of earthquake resistance, it is necessary to peel off the asphalt surface layer. In order to respond to such a request, for example, a surface peeling method for a concrete structure as disclosed in Patent Document 1 has been conventionally proposed.

In the method described in Patent Document 1, a pin is inserted into a plurality of holes formed in advance on the surface of a deteriorated concrete structure such as a floor, a wall, or a pillar, and at least one pin is moved to another pin by a moving mechanism. By reciprocating in the direction of approaching and separating, the surface of the structure between the plurality of holes is crushed and the surface is peeled off.

Further, in Patent Document 2, the lower surface of the asphalt pavement is melted by an electromagnetic induction coil located above the asphalt pavement provided on the steel plate, and the ripper which is a wedge-shaped peeling member is melted of the lower surface of the asphalt pavement. A method for peeling an asphalt pavement has been proposed in which the asphalt pavement is peeled off from a steel plate by inserting it into a layered layer so that the peeled asphalt pavement can be handled in a block shape.

Further, Patent Document 3 describes a device that heats an adhesive layer before peeling the asphalt pavement on a steel deck constituting a bridge via an adhesive layer, and is a device that heats the adhesive layer along the asphalt pavement surface in a traveling device. The surface of the steel pavement is induced and heated by the induced magnetic flux generated from the inductive coil, and the adhesive layer in contact with the inductive coil is heated and softened to efficiently strip the asphalt mixture layer and the adhesive layer. A well-used bridge surface asphalt pavement induction heating device has been proposed.

Further, Patent Document 4 includes at least teeth and a tooth driving device firmly attached to a power accumulator in a hydraulic hammer ripper in which teeth are attached to the headstock of an excavator by a plurality of attachment items. ing. The assembly consisting of the tooth, the drive and the power accumulator is firmly attached to the tooth and on the longitudinal axis of the tooth, which allows the excavation of the ground to be carried out on the tooth. Achieved using lift and deployment positions. A hydraulic hammer ripper for an excavator that has been made to break hard ground features such as stone, concrete, and asphalt and move them with a hammer is disclosed.

Japanese Unexamined Patent Publication No. 2005-67143 Japanese Patent No. 4330639 JP-A-2007-146459 Special Table 2012-532765 Registered Practical New Plan No. 3206524

However, the conventional surface peeling method has the following problems. For example, in the method described in Patent Document 1, the surface of a concrete structure is crushed and peeled off by moving a pin. Therefore, since the crushed region is in the range corresponding to the diameter of the pin, the peeling efficiency is poor and the working time is long, so that it is not suitable for peeling in a wide range. Further, since the pin moves while crushing the entire area in the depth direction of the portion to be peeled off, a strong driving torque is required to move the pin even if the crushing speed is slow. Therefore, it is unavoidable that the drive mechanism including the motor becomes large, and a large amount of energy is consumed.

In particular, in a non-landing scraper that deals with the blistering phenomenon, care must be taken not to give an impact to the slab, so a method of peeling with the tooth of the bucket of the power shovel can be considered, but the tooth Because the material of is soft, when peeling the asphalt, the tip of the toe slips and it is difficult to peel off. Nail wears quickly. Since the distance between the nails is wide, unpeeled (jumping) occurs. Further, since four teeth are attached to the bucket, there are problems that the amount of construction is increased, but the unevenness and flatness of the peeled surface at the site cannot be dealt with, and the finished construction surface becomes rough.

Therefore, a wedge-shaped coupler that is fitted into a plurality of teeth provided in a comb shape at the tip of the bucket of the power shovel so as to cover the tooth is curved according to the inclination of the tooth, and a blade portion is formed at the tip. A stripping claw device for a non-cutting non-land layer, which is made of special steel and has a scraper (peeling claw) having a blade formed on an edge having a rectangular plate shape, has been proposed (see Patent Document 5). According to this device, it is said that the asphalt cutting has good bite to the non-land layer, the peeling work can be easily performed, the edge wear is slow, there is no unpeeled residue, and the working time can be shortened.
The present invention relates to an improvement of this peeling claw device, and reduces the cutting load received by the cutting edge by sharpening the contact angle of the cutting edge of the cutting edge with respect to the floor slab and increasing the length of the cutting edge per unit area. It is an object of the present invention to provide a peeling fan blade device for an asphalt cutting non-landing layer, which can not only be capable of but also reduce the cutting resistance rate and the blade spill rate.

In order to achieve the above object, the asphalt pavement cutting non-land layer peeling claw blade device according to the present invention is a crane device equipped with a boom that can be swiveled, undulated and expanded and contracted in the substantially central part of the front-rear method of the vehicle body by hydraulic drive. A coupler attached to the tooth of the bucket at the tip of the boom by covering the tooth in the thickness direction and a coupler that is curved according to the inclination of the tooth, and the outer shape in which the blade portion is formed at the tip is made larger than the tooth width. Detachable attachment of a rectangular plate-shaped scraper The first feature of the asphalt cutting non-landing layer peeling claw device is that the contact angle between the scraper blade and the asphalt cutting non-landing layer is inclined. .. The second feature is that the contact angle is 45 degrees ± 44 degrees. Further, a third feature is that a plurality of rows of scrapers are provided in the front-rear direction and are arranged in a staggered manner. Further, the fourth feature is that the blade portions are formed on the top, bottom, left and right of the scraper. In addition, the fifth feature is that the scraper is made of a boron steel plate.

(1) Workability is good because the operator can perform the peeling work positively.
(2) Since the bucket is driven by the hydraulic pump of the power shovel or the hydraulic pump connected to the engine, it is not necessary to separately provide a water tank or a compressor, and the mobility of the vehicle is not impaired.
(3) Since the scraper is made of a hard material and has a sharp tip, it has a good bite to asphalt and can be easily peeled off. In addition, since the edge (blade portion) wears slowly and the edge width is wide, there is no unpeeled residue and the working time can be shortened.
(4) Further, since the width per scraper is formed larger than the tooth, the cost can be reduced because the number of scrapers is small.
(5) Since the bucket is hydraulically driven to reciprocate up and down to perform the peeling work, there is little vibration and the impact on the slab is also small.
(6) By increasing the length of the cutting blade per unit area, the load on the blade can be reduced.
(7) Since the floor plate is cut at an oblique angle, the resistance factor is reduced and the blade spill rate is also reduced.
(8) Diagonal angle cutting resultant force is improved, sharpness is improved, and cutting vibration is reduced.
(9) Since the unit construction amount is increased, the cutting work unit price is reduced.
(10) Vibration to the bucket is also reduced, and the resistance load on the bucket member is reduced.

(A) is a front view and (b) is a side view showing an embodiment of a scraper (peeling fan blade) according to the present invention. It is a perspective view which shows the state which attached the scraper (peeling fang blade) which concerns on this invention to the tooth of a bucket. It is an enlarged perspective view of the main part of FIG. It is a side view which shows typically the use state of the peeling fang blade which concerns on this invention. (A) is a plan view and (b) is a side view of a main part of the blade, which schematically shows another embodiment of the peeling fan blade according to the present invention. (A) showing the cutting split of the scraper from the blade is a plan view when indexing into a square shape, (b) is a sectional view taken along line AA of (a), and (C) is a plan view when indexing into a parallel quadrilateral shape. Is. Both (a) and (b) are a front view and a cross section for explaining the spring effect when a thin steel plate is used for the blade. In front of the main part showing the arrangement state of the scraper, (a) shows the state where the blade part of the scraper is arranged parallel to the floor slab, and (b) shows the state where the blade part of the scraper is arranged obliquely to the floor slab. ..

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The case where the peeling fang blade according to the present invention is attached to a tooth (teeth) provided in a comb shape in a bucket of a power shovel is shown.

As shown in FIG. 1, the swivel power shovel is provided with a dozer 2 on the front surface of the vehicle body 1 for scraping off scattered objects on the floor slab, and is located at the substantially central portion of the vehicle body 1 in the front-rear direction in the center of both sides of the vehicle. A bracket 4 is fixed on the loader frame 3 on one side of the portion or one of them, and the crane device 5 is mounted via the bracket 4.

The crane device 5 is a multi-stage boom type crane device equipped with a hydraulic control device for driving the bucket 6 and the boom 7, and is capable of turning, undulating and expanding / contracting.

The turning, undulating and expanding / contracting operation of the crane device 5 is performed from the hydraulic pump of the vehicle body 1 which is the hydraulic drive source or the hydraulic pump connected to the engine via a hydraulic control circuit (not shown) including a hydraulic circuit for the crane. It is operated by a control rod provided in the driver's cab.

The cylinder portion 8b of the hydraulic cylinder 8 is fixed to the tip of the boom 7 of the crane device 5, one end of the piston rod 8a of the hydraulic cylinder 8 is pivotally attached to the tip of the boom 7, and the other end is pivoted to the bucket 6. The bucket 6 is reciprocated up and down by the operation of the hydraulic cylinder 8 when it is worn, and the reciprocating movement can be continuously driven by the oil switching means.

As shown in FIGS. 1 to 3, in the present invention, a wedge-shaped coupler is attached to a plurality of tooth 9s provided in a comb shape at the tip of a bucket 6 by fitting them so as to cover the tooth 9 in the thickness direction. A scraper (peeling claw) 10 made of special steel having a blade portion 10a formed at the tip and having a blade portion 10a formed on an edge having a rectangular outer shape is welded to 10b, which is curved according to the inclination of the tooth 9. And attached. The problem with the conventional tooth 9 is that the material of the tooth 9 is soft, so that when the asphalt is peeled off, the toes slip and it is difficult to peel off. Nail wears quickly. Since the distance between the nails is wide, there will be some leftovers (jumping). In addition, the construction cost was high because four tooths were attached to the bucket. Further, although the amount of construction is increased, there are problems that the unevenness and flatness of the peeled surface at the site cannot be dealt with and the finished construction surface becomes rough.

The scraper 10 of the present invention is made of a boron steel plate. Even if the boron steel sheet is relatively thin, the material is hard and has high toughness, and since the tip is a sharp-edged blade portion 10c, it has good bite to the asphalt layer and can be easily peeled off. The most characteristic feature of the present invention is that the scraper blade portion 10c and the asphalt cutting non-land layer A are provided with an inclined contact angle. By setting the contact angle α to 45 degrees ± 44 degrees, the load on the blade can be reduced by increasing the length of the cutting blade per unit area. In addition, due to oblique cutting, the resistance factor is reduced and the blade spill rate is also reduced. In addition, the diagonal cutting resultant force is improved, the sharpness is improved, and the cutting vibration is reduced. In addition, since the unit construction amount increases, the cutting work unit price becomes low. In addition, vibration to the bucket is also reduced, and the resistance load on the bucket member is reduced, which is an excellent effect.

Further, since the scraper 10 has a wider edge width than the tooth 9, there is no unpeeled residue, and the working time can be shortened. In addition, since the construction cost has a wide range per scraper, only two scrapers are required, so that the cost can be suppressed. In addition, the degree of freedom in cutting is increased, and a good finished construction surface can be obtained by sufficiently corresponding to the unevenness and flatness of the peeled surface at the site.

As shown in FIG. 2, in the scraper 10 according to the present invention, a plurality of tooth 9s 9 provided in a comb shape at the tip of a bucket 6 are covered and fixed with a coupler 10b, and a peeling fan blade 10a made of a special steel plate having a sharp tip is used. Is replaceably attached, and the material may be any material having the strength and durability required for the peeling work of the asphalt pavement A, and it is preferable to use a steel material. Further, the coupler 10b and the scraper 10 may be joined by welding or by bolts and nuts.

In this way, since the scraper 10 can be replaced, even if the blade portion 10c of the peeling fan blade 10a is worn or damaged due to a long-time peeling operation, it can be replaced with a new one. Further, the cutting edge portion 10c at the tip can be reshaped and reused.

Next, the procedure for peeling the asphalt pavement cutting non-land layer according to the present invention will be described. The fang blade portion 10a of the scraper 10 is inserted into the lower surface layer of the region to be peeled off, and the asphalt pavement cutting non-land layer A is scraped off from the floor slab F. Further, as shown in FIG. 5A, if a plurality of scrapers 10 are provided in the front and rear rows and arranged in a staggered pattern on the left and right, the cutting non-land layer A can be peeled off more cleanly. Further, as shown in FIG. 5B, the scraper 10 may be made of an elastic steel material to have elasticity. The asphalt cutting non-land layer A can be scraped off without producing a large vibration or noise as in the chipping method.

FIG. 6 shows a blade having a unit size and curved in the vertical direction, for example, when determining a scraper 10 having a length l of two pieces in a square shape from a vertical width W and a total length L, the scraper 10 has a vertical length D1. (W), the length of the fang blade portion 10a is also D1. When this is calculated into a parallel quadrilateral shape with an oblique angle α, the length of the blade portion 10a is D2 even if the same two pieces are horizontally long l. That is, when the scraper 10 is indexed into a parallel quadrilateral shape, the length of the fang blade portion 10a becomes D2> D1, and the load on the scraper 10 can be reduced by increasing the length of the cutting blade portion per unit area. In addition, due to oblique cutting, the resistance factor is reduced and the blade spill rate is also reduced.

Further, as shown in FIG. 7, when a highly tough material such as a thin-walled boron steel plate is used for the scraper 10, the vertical length is compressed by the length Pd by the pressing force P of the crane device 5, and the spring effect ( Repulsive force) is exerted, the degree of adhesion to the floor slab F is improved, the diagonal cutting resultant force is improved, the sharpness is improved, and the cutting vibration is also reduced.

As shown in FIG. 8A, when the arrangement state of the square scrapers 10 is shown, when the blade portions 10a of each scraper 10 are arranged parallel to the floor slab F, a gap d is generated, but FIG. 8B shows. As shown in the above, by arranging the scraper 10 obliquely with respect to the floor slab F, this gap d can be supplemented by the overlapping width d portion of the blade portion. By arranging the scraper 10 in an inclined manner in this way, the unit construction amount increases, so that the cutting work unit price becomes low. In addition, vibration to the bucket is also reduced, and the resistance load on the bucket member is reduced. As described above, according to the present invention, the peeling fan can be easily mounted on a vehicle or the like without impairing the mobility of the vehicle, an appropriate scraping action can be obtained, and there are few failures, and the peeling fan is excellent in economy. A blade device is provided.

The above embodiment has been described particularly in relation to a power shovel that operates on the road surface in order to peel off the asphalt-cut non-land layer on the road surface, but the present invention is not limited to this and is widely mounted on earthwork vehicles and is used on the road surface. It can be used as a peeling device for peeling the asphalt cutting non-land layer.

1 Power shovel body 2 Dozer (soil removal plate)
3 Loader frame 4 Bracket 5 Crane device 6 Bucket 7 Boom 8 Hydraulic cylinder 8a Piston rod 8b Cylinder part 9 Tooth (teeth)
10 scraper (peeling blade)
10a Blade part 10b Mounting coupler F Floor slab A Asphalt cutting Non-land α Contact angle d Gap (overlapping width)
P push pressure Pd compression width

In order to achieve the above object, the asphalt pavement cutting non-land layer peeling fang blade device according to the present invention is a crane device equipped with a boom that can be swiveled, undulated and expanded and contracted in the substantially central part of the front-rear method of the vehicle body by hydraulic drive. A coupler attached to the tooth of the bucket at the tip of the boom by covering the tooth in the thickness direction and a coupler that is curved according to the inclination of the tooth, and the outer shape in which the blade portion is formed at the tip is made larger than the tooth width. Detachable attachment of a rectangular plate-shaped scraper The first feature of the asphalt cutting non-landing layer peeling claw device is that the contact angle between the scraper blade and the asphalt cutting non-landing layer is inclined. .. The second feature is that the contact angle is 45 degrees ± 44 degrees. Further, a third feature is that a plurality of rows of scrapers are provided in the front-rear direction and are arranged in a staggered manner. Further, the fourth feature is that the blade portions are formed on the top, bottom, left and right of the scraper. In addition, the fifth feature is that the scraper is made of a boron steel plate.

Claims (5)

The front and rear method of the vehicle body by hydraulic drive A coupler attached to the tooth of the bucket at the tip of the boom of a crane device equipped with a boom that can rotate, undulate, and expand and contract in the center, and the tooth. A rectangular plate-shaped scraper whose outer shape is curved according to the inclination and whose tip is formed to be larger than the tooth width is detachably attached. In the asphalt cutting non-land layer peeling claw device, the scraper A peeling fan blade device for asphalt cutting non-landing layers, characterized in that the contact angle between the blade and the asphalt cutting non-landing layer is inclined. The peeling fang blade device for an asphalt-cutting non-land layer according to claim 1, wherein the contact angle is 45 degrees ± 44 degrees. The peeling fang blade device for an asphalt cutting non-land layer according to claim 1 or 2, wherein a plurality of rows of scrapers are provided in the front-rear direction and arranged in a staggered manner. The peeling fan blade device for an asphalt cutting non-landing layer according to any one of claims 1 to 3, wherein the blade portions are formed on the top, bottom, left and right of the scraper. The peeling blade device for an asphalt cutting non-land layer according to any one of claims 1 to 4, wherein the scraper is made of a boron steel plate.

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