JP2005083035A - Paving material feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paving material feeder which is for use in paving a road and smoothly and quantitatively feeds a paving material charged from a dump truck into a hopper, to a conveyor arranged on the rear of the feeder. <P>SOLUTION: According to the structure of the paving material feeder, both side rotary spiral blades 3, 3 are arranged across a rotary raking plate 2 in the rear of the hopper 1, and a squeezing plate 4 for feeding the paving material D charged in the hopper 1 to the raking blade 2 and both the side rotary spiral blades 3, 3, is arranged in the front of the hopper in a manner reciprocating frontward and rearward. Thus by using the squeezing plate 4, the paving material D is quantitatively fed to the raking plate 2 and both the side rotary spiral blades 3, 3, and then collected toward the raking plate 2 by both the side rotary spiral blades 3, 3, whereby the paving material D is quantitatively fed onto a conveying starting edge of the conveyor C arranged on the rear of the feeder by the raking plate 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pavement feeding device that quantitatively feeds a pavement material such as asphalt mixture or concrete input from a dump truck or the like to a conveyor or the like when paving a road.

  Conventionally, when concrete pavement and asphalt pavement are performed, it is necessary to supply pavement materials such as concrete and asphalt mixture to a paver. However, for example, in asphalt pavement, the height of the rear bumper of the dump truck that transports the asphalt mixture is limited to the upper surface of the hopper bottom. As such a pavement material supply means, for example, in an asphalt pavement machine, the conveyor does not extend to the hopper due to the structure. Therefore, the asphalt composite material thrown into the receiving hopper from the dump truck is fed into the uphill conveyor by tilting the stacking inclination angle, the hopper bottom plate inclination angle and the entire hopper toward the conveyor. (For example, refer to Patent Document 1).

JP 2000-192418 A (pages 2 to 4, FIGS. 1 and 2).

  However, according to the pavement material supply means as described above, the bottom portion of the receiving hopper on which the conveying start end portion of the conveyor is disposed is a flat or slightly inclined bottom plate. When the pavement material is thrown into the hopper, the pavement material deposited on the bottom of the hopper is not sent to the conveyor entrance only by the inclination angle of the pile, so additional work such as temporarily moving the dump truck away and lifting the hopper is delayed. It will be tough.

  Such a problem can be solved if the pavement material deposited on the bottom of the hopper is fed to the conveyor start end without lifting the hopper.

  The present invention has been made in view of such problems, and the object of the present invention is to provide a pavement material deposited on the hopper bottom while maintaining the height of the hopper bottom equal to the height of the conventional machine. It is in providing the feeding apparatus which sends to the conveyor head end part.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a pavement material feeding device in which the pavement material accumulated at the bottom of the hopper at the center of the rear portion of the hopper is directed toward the rear conveyor start end. The pushing plate to be fed in is configured to be reciprocally movable back and forth.

  In the pavement material feeding apparatus configured as described above, the invention according to claim 2 is configured such that the pushing plate is disposed lower than the hopper bottom plate, and the conveying plate is attached to the pressing surface and the top surface thereof to deposit on the hopper bottom surface. In order to efficiently transport the pavement material to the conveyor start end, and to obtain a strong pressing force together with the gap between the pushing plate structure and the road surface, a hydraulic cylinder is arranged facing the pushing plate and used as power for reciprocating motion Yes.

  Furthermore, the invention according to claim 3 is the pavement material feeding device configured as described above, and the pavement material is placed in the rear center of the hopper in order to ensure that more pavement material fed by the pushing plate is placed on the conveyor. In addition, a scraping plate to be fed to the scraping plate is disposed, and a rotating spiral blade that scrapes inward toward the scraping plate is provided.

  According to the pavement feeding device of the present invention, as described in claim 1, the push plate for feeding the pavement material put into the hopper backward on the front bottom surface of the hopper toward the conveyor is moved back and forth. Since it is arranged to move freely, it can receive a large amount of pavement material and efficiently feed it backwards.

  According to a second aspect of the present invention, a transport plate for transporting the pavement material is disposed above the push-in plate, and a hydraulic cylinder is mounted therein and reciprocated by the hydraulic cylinder.

  According to the invention according to claim 3, since the scraping plate and the both-side rotating spiral blades are disposed at the upper end of the rear portion of the hopper, the pavement material can be easily and smoothly put into the conveyor. it can.

  Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a feeding device A for a pavement material such as asphalt mixture or ready-mixed concrete conveys the pavement material to the rear road pavement surface. A hopper 1 having a bottom plate 1a having a flat rectangular shape disposed on the front end of a paving machine B having a conveyor C for forming a flat bottom surface (inner bottom surface), and the hopper 1 A scraping plate 2 rotatably disposed in the center of the rear portion of the interior, and a pavement material D disposed rotatably on both sides of the scraping plate 2 toward both outer ends of the scraping plate 2. Rotating spiral blades 3 and 3 (shown in FIG. 2 and FIG. 3) that scrape up and down, and a pavement material D toward the scraping plate 2, which is disposed under the front bottom surface 1 a of the hopper 1 so as to be movable back and forth. A push-in plate 4 to be fed in is provided.

  As shown in FIGS. 2 to 4, the hopper 1 has a rear portion where the scraping plate 2 and the two-sided rotating spiral blades 3, 3 are arranged with a narrower front-rear width and a width between both side ends. A curved surface portion 1a which is formed in a slightly wide planar horizontally long rectangular shape and is curved in a convex arc shape backwardly obliquely downward at a connecting portion between a lower end of the rear plate 1b and a rear end of a bottom surface portion 13 which will be described later 'Forming.

  Both outer sides of the both-side rotating spiral blades 3 and 3 are closed by side plates 1e and 1e that are integrally connected to both rear ends of the bottom plate 1a and both ends of the rear plate 1b. Further, the bottom plate 1a Auxiliary hoppers 6, 6 communicating upward on the bottom plate 1 a are disposed so as to be able to swing up and down without providing both side plates at both side ends of the hopper 1, and the front end of the hopper 1 opens forward. In addition, the upper end of the front portion of the hopper 1 is fully opened to form the pavement material inlet 11.

  The auxiliary hoppers 6 and 6 have a structure in which the lower ends of the rear plate 6b and the side plate 6c are integrally connected to the rear end and the outer end of the bottom plate 6a, respectively, and the inner end of the bottom plate 6a is the bottom. In the state where it is pivotally attached to both side ends of the face plate 1a so as to be able to swing up and down, the inner end of the hopper 6 is fully communicated with the hopper 1 and the hopper 1 and the auxiliary hopper 6 scrape the above. A wider hopper is formed than the rear part where the raising plate 2 and the two-sided rotating spiral blades 3 and 3 are disposed.

  As shown in FIG. 3, the auxiliary hoppers 6, 6 can be pivoted up and down, as shown in FIG. 3, with the lower ends of the support protrusions 10 suspended from the both side ends of the bottom plate 1 a of the hopper 1 and their auxiliary The outer ends of the bottom plate 6a of the hoppers 6 and 6 are connected by hydraulic cylinders 7 and 7 and the rods of the hydraulic cylinders 7 and 7 are expanded and contracted to be pivoted with the bottom plate 1a of the hopper 1 when extended. As a fulcrum, the inner side, that is, the hopper 1 side is bent down and contracted to be turned outward to stand.

  The scraper plate 2 rotatably disposed at the center of the rear portion in the hopper 1 is a central portion in the length direction of the rotation center shaft 8 that is rotatably supported at both ends by the side plates 1e and 1e. And is configured to rotate integrally with the rotation center shaft 8. Specifically, a plurality of arm members 2b having a predetermined length are radially provided at the central portion of the rotation center shaft 8, and a horizontally-long rectangular scraping plate portion 2a is fixed to the tip of each arm member 2b. Thus, by rotating the rotation center shaft 8, the leading edge of the scraping plate portion 2a is in contact with the inner surface of the curved surface portion 1a 'formed from the rear end portion of the bottom surface portion 13 to the lower end of the rear surface plate 1b. Alternatively, the pavement material D is scraped up by moving it forward along the curved surface portion 1a 'in an extremely close state.

  Furthermore, the width direction center of the rear plate 1b corresponds to the width between the lower peripheral surface of the rotation center shaft 8 and the upper end of the scraping plate 2 with the width equal to or slightly narrower than the width of the scraping plate 2. The pavement material D is formed in the feeding port 9 that feeds the pavement material D backward from the scraping plate 2 by cutting it into a rectangular shape with a width to be cut.

  The both-side rotating spiral blades 3 and 3 are integrally fixed to both side portions of the rotation center shaft 8 with the scraping plate 2 being the center, and the outer diameters of these rotating spiral blades 3 and 3 are scraped up. It is made to rotate integrally with the scraping plate 2 by the rotation of the rotation center shaft 8 in a state of being substantially equal to the outer diameter of the plate 2 and in contact with or very close to the inner surface of the curved surface portion 1a ′. The spiral directions of the both-side rotating spiral blades 3 and 3 are formed opposite to each other so that the paving material D can be scraped toward the scraping plate 2 from the outside to the inside, that is, the center by rotation. The motor 12 for rotating the rotation center shaft 8 is mounted on the one side plate 1e.

  The pushing plate 4 that feeds the pavement material D to the scraping plate 2 and the two-sided rotating spiral blades 3 and 3 is formed in the shape of a front oblong strip that is equal in width to the width between both ends of the bottom plate 1a. The lower edge thereof is in contact with the bottom surface portion 13 and is disposed on the bottom surface portion 13 so as to be movable back and forth. The rear end of the bottom surface portion 13 is continuous with the lower end of the curved surface portion 1a ′.

  As a mechanism for moving the pushing plate 4 back and forth, a lower bottom plate 13 parallel to the bottom plate 1a is provided with a small space downward from the bottom plate 1a from the front end of the hopper 1 to a portion reaching the middle in the length direction. A space between these bottom plate 1a and lower bottom plate 13 'is formed in the arrangement chamber 15 of the hydraulic cylinders 14 and 14 on both sides. Then, the hydraulic cylinders 14 and 14 are fixed to both side portions in the cylinder arrangement chamber 15 with the piston rod 14a facing rearward, and the tip (rear end) of the piston rod 14a is fixed to the push-in plate 4. In the state where the piston rod 14a is extended to the maximum while being fixed to both sides of the front surface, the pushing plate 4 is moved backward from the lower bottom plate 13 'at the opening end of the cylinder installation chamber 15 toward the rear. In the state where the piston rod 14a is contracted, the pushing plate 4 is moved forward along the bottom surface portion 13 provided horizontally in the extending direction of 13 'to the position reaching the vicinity of the scraping plate 2. The rear end opening of the placement chamber 15 is moved back to a position where it is closed.

  Further, the rear end of the flat rectangular transport plate 16 that is in contact with the lower surface of the hopper bottom surface 1a and reciprocates in the front-rear direction integrally with the pusher plate 4 is fixed to the upper end of the pusher plate 4 integrally. The transport plate 16 has the same width as the pushing plate 4 and the length in the front-rear direction is such that when the pushing plate 4 moves forward until it reaches the front end side of the scraping plate 2, its front end is the rear end of the hopper bottom surface 1a. The length is in contact with the lower surface of the part, that is, the length that does not separate from the hopper bottom surface 1a. As shown in FIG. 1, the bottom surface portion 13 is configured to be openable and closable downward so that it can be cleaned, inspected and repaired.

  A support roller 17 is rotatably supported on the side of the front end portion of the bottom plate 13 in the feeding apparatus A configured as described above, and brackets 18 are provided rearward on the side plates 1e and 1e at the rear. The bracket 18 is pivotally mounted 20 on both sides of the front end of the paving machine B so as to be pivotable in the vertical direction. Further, a hydraulic cylinder is provided between the rear upper end of the bracket 18 and the front end of the paving machine B. 19, the piston rod 19 a of the hydraulic cylinder 19 is contracted to cause the feeding device A to stand up with the pivoting portion 20 as a fulcrum, and the piston rod 19 a is extended to extend the feeding device A Is installed on the road surface. Moreover, the conveyance start end part of the conveyor C arrange | positioned at the machine B for paving is made to face the back lower part of the said feed port 9 opened in the center part of the rear surface board 1b. The width of the conveyor C is the same as or slightly wider than the width of the scraping plate 2.

  Since it comprised in this way, when performing pavement work, it is the state which installed the feeder A on the road surface, and the inside of this feeder A from the dump truck (not shown) through the inlet 11 of the feeder A And deposited on the inner bottom surface of the hopper 1, that is, on the flat bottom surface on the bottom surface portion 13 and the hopper bottom surface 1a.

  Next, when the piston rod 14a of the hydraulic cylinders 14 and 14 disposed in the cylinder disposing chamber 15 formed below the hopper bottom surface 1a of the hopper 1 is extended, the pushing plate 4 is pushed backward and thereafter The pavement material D accumulated on the bottom surface portion 13 of the hopper 1 is pushed and moved rearward, and a plurality of scraping plates 2 projecting radially from the central portion of the rotation center shaft 8 and the scraping plate The paving material D is supplied to the rotating spiral blades 3 and 3 disposed on both sides of the plate 2. When there is no scraping plate 2, it is fed directly to the conveyor start end.

  The arm member 2b of each scraping plate 2 and the both-side rotating spiral blades 3 and 3 are fixed to a common rotating center shaft 8 and rotate integrally by rotating the rotating center shaft 8, and therefore, the scraping plate is scraped up. The pavement material D supplied to the plate 2 side is scraped upward while being smoothly received on the scraping plate portion 2a fixed to the tip of the arm member 2b by the rotation of the scraping plate 2. When it is rotated backward from the upper end downward, it is dropped from the scraping plate portion 2a and dropped and transferred onto the conveyance start end portion of the conveyor C from the feeding port 9 opened obliquely rearward. It is conveyed by this conveyor C to the rear pavement construction side.

  Further, the paving material D fed to the rotating spiral blades 3 and 3 on both sides of the scraping plate 2 is scraped toward the scraping plate 2 by the rotation of these rotating spiral blades 3 and 3, and the rotating spiral blade 3. 3 is sent to each of the scraping plate portions 2a of the scraping plate 2 that is rotating integrally with the plate 3, and is then picked up in the same manner as described above, and dropped and transferred onto the conveyance start end portion of the conveyor C through the feeding port 9. .

  On the other hand, when the pavement material D accumulated on the bottom surface portion 13 is pushed toward the scraping plate 2 by the pushing plate 4, the transport plate 16 is refracted horizontally from the upper end of the pushing plate 4 to the front. Is pulled rearward from the cylinder placement chamber 15 and receives the pavement material D accumulated upward from the push-in plate 4 on its upper surface, and is deposited on the conveying plate 16 that moves integrally with the horizontal movement rearward. The pavement material D is fed onto the rear bottom surface portion 13. At the same time, the pavement material D deposited on the hopper bottom surface 1a sequentially falls on the transport plate 16 that protrudes rearward from the lower portion of the hopper bottom surface 1a, and the pavement material is placed on the transport plate 16 until the hydraulic cylinder 14 extends to the maximum extent. The lump accumulated in D is completed. When the piston rods 14a of the hydraulic cylinders 14 and 14 are contracted from this state and the pushing plate 4 is moved back to the original position, the pavement material D that has been received by the conveying plate 16 until then becomes the bottom surface portion 13. Will fall to the top.

  Then, the piston plate 14a of the hydraulic cylinders 14 and 14 is extended again to reciprocate the pushing plate 4 backward, and the pavement material D is scraped up with the scraping plate 2 and the rotating spiral blades 3 and 3 on both sides in the same manner as described above. The pavement material D is dropped and transferred to the conveyance start end portion of the conveyor C sequentially from the feeding port 9 by the rotation of the scraping plate portion 2a of each scraping plate 2.

  At this time, the width of the feed port 9 is formed to be equal to or slightly narrower than the width of the scraping plate 2, and the width of the conveyor C is formed to be the same width as the width of the scraping plate 2 or slightly wider. In addition, since the height of the feeding port 9 is limited, the entire amount of the pavement material D sent to the scraping plate 2 is not sent at a time, and the pavement material D that matches the next opening area is fed. Since the amount is dropped from each scraping plate 2, the pavement material D dropped onto the conveying start end of the conveyor C through the feeding port 9 is conveyed almost uniformly without spilling from the conveyor C. When the pavement material D accumulated on the hopper bottom surface 1a in the hopper 1 remains after the feeding, the feeding device A is moved from its front end by contracting the piston rod 19a of the hydraulic cylinder 19. What is necessary is just to move the pavement material D on the hopper bottom face 1a to the bottom face part 13 side in a state inclined obliquely downward toward the rear end.

  The auxiliary hoppers 6 and 6 are deployed to increase the volume of the hopper 1 in order to contact the dump truck, and a large amount of pavement material D is loaded and accumulated from the dump truck in the hoppers 1 and 6. When the pavement material D is sent to the scraping plate 2 side by reciprocating the pushing plate 4 as described above, the hydraulic cylinder 7 is used when the amount of the pavement material D on the bottom surface 13 or the hopper bottom surface 1a decreases. 7, the auxiliary hoppers 6, 6 may be rotated in a standing direction, and the paving material D in these auxiliary hoppers 6, 6 may be fed onto the bottom surface portion 13 of the hopper 1 or the hopper bottom surface 1 a.

  Thus, when the paving machine B is a paving machine such as an asphalt finisher, the paving material D sent from the hopper 1 of the feeding device A onto the conveyor C on the paving machine B side is the paving material D. Is spread on a road surface by a spreader provided in the paving machine, and spread by a screed. As shown in FIG. In the case of a machine equipped with a folding conveyor C1 that feeds paving material made of ready-mixed concrete to the placement surface, the bar arrangement work for pavement is performed in the lower space part of this contour C1. The feeding device A can also be used for the paving machine B.

It is a simple vertical side view of the feeding device arranged in the paving machine. It is a partially cutaway simplified plan view of the feeding device. It is a rear view of the state which omitted the rear panel of the feeding device. It is a simple vertical side view of the state which moved the pushing board forward. It is a simplified side view which shows another machine provided with the feeding apparatus.

Explanation of symbols

A feeding device B paving machine C conveyor D paving material 1 hopper 2 scraping plate 3 rotating spiral blade 4 pushing plate 9 feeding port
16 Transport plate

Claims (3)

  In a road machine having a hopper that receives a pavement material from a pavement material transport vehicle such as a dump truck or a truck mixer, a push plate for feeding the pavement material to the conveyor start end is disposed at the bottom of the hopper so as to be capable of reciprocating back and forth. Pavement material feeding device.   The pushing plate is arranged below the hopper bottom plate, and the pushing plate itself has a conveying plate on the upper side thereof so that the pavement material accumulated on the pushing plate can be fed and reciprocated by a hydraulic cylinder arranged in front of the pushing plate. The pavement material feeding device according to claim 1, wherein the pavement material feeding device is a pavement material feeding device.   A rotating spiral blade for scraping a side pavement material inward and a scraping plate for stacking the pavement material on the conveyor are provided coaxially between the pushing plate and the conveyor start end. The pavement material feeding device according to claim 1 or 2.

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