JP2009035966A - Paving machine with paving material measuring means - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of a conventional paving machine that when the weight of a paving material is measured using a load cell, the weight of a bar feeder 12 which is far heavier than the paving material is measured as tare weight, and therefore, the weight of the paving material which is far lighter than the tare weight cannot have been accurately measured. <P>SOLUTION: A load equivalent to the tare weight is measured by a first measuring plate 50 positioned on the upstream side more than the supply position B of the paving material 60. The load of the conveyed paving material 60 is calculated by deducting the load equivalent to the tare weight measured by the first measuring plate 50 from the load measured by a second measuring plate 52 positioned on the downstream side more than the supply position B. Since the tare weight measured by the first measuring plate 50 is not far heavier than the conveyed paving material 60 as in the case of a conventional bar feeder 12, the weight of the conveyed paving material 60 can be more accurately measured. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a paving machine provided with a weighing unit that measures the load of a paving material conveyed by a conveying device such as a bar feeder.

  Conventionally, as this type of pavement machine, for example, there is a road surface layer regeneration device disclosed in Patent Document 1 below. This road surface layer recycling apparatus includes a hopper that receives a supply of new pavement material from a dump truck that runs ahead, at the foremost part of the traveling vehicle. The new material supplied to the hopper is transported to the rear end side of the traveling vehicle by the feeder and supplied to the mixing container of the bag mill mixer. A scarifier for scraping the pavement on the road surface is disposed at the lower part of the traveling vehicle, and the recycled material obtained by scraping the pavement is conveyed to the rear heater by the feeder. The amount of recycled material obtained from the road surface is calculated on the basis of the measured value of the laser sensor in front of the sculpture. The recycled material heated by the heater is supplied to the mixing container of the bag mill mixer by the feeder. The weight of the mixture of new material and recycled material in the mixing container is measured using a load cell, and an amount of additive corresponding to the measured weight of the mixture is supplied into the mixing container to produce a recycled mixture. Is done. The regenerated mixture is spread on the road surface with a spreading screw and laid down with a screed. In this road surface layer recycling device, the new material is transported from the hopper to the new material surge bin in order to prevent the quality of the recycled mixture from being deteriorated due to a sudden change in the ratio of the new material amount to the recycled material amount. The amount is also measured.

  FIG. 1 is a diagram for explaining a load cell type weighing bar feeder that is provided in a conventional pavement machine of this type and calculates a conveyance amount of a pavement material supplied from a hopper and conveyed by a bar feeder.

  In the conventional load cell type weighing bar feeder shown in the figure, the new material thrown into the hopper 11 is carried by the conveyor 11a and dropped onto the sliding plate 12c. The hopper 11 is installed on the traveling vehicle 14 by a support member 11b. A pair of sprockets 12a and 12a are attached to both ends of the bar feeder 12, and a single chain 12b is bridged between the sprockets 12a located on the same side. A plurality of flight bars (not shown) are spanned between the chains 12b at a predetermined interval. The chains 12b and 12b circulate in the direction of the arrow as the sprockets 12a and 12a rotate, and the flight bar spanned between the chains 12b and 12b also moves in the direction of the arrow together with the chains 12b and 12b. A sliding plate 12c is disposed immediately below the circulation track of the chains 12b and 12b. The flight bar conveys the new material on the sliding plate 12c while sliding along the surface of the sliding plate 12c. The new material moves to the rear end of the sliding plate 12c and falls as indicated by the arrow. The bar feeder 12 is installed on the traveling vehicle 14 with one end of the sliding plate 12c supported by a support member 14a provided on the traveling vehicle 14 at a fulcrum 13a and the other end supported by a fulcrum 13b.

The weight of the new material conveyed on the sliding plate 12c is obtained by measuring the load applied to the fulcrum 13b on the rear end side using the load cell 15, and the weight of the bar feeder 12 that has been measured in advance from the measured value, that is, the tare. It was calculated by subtracting the weight.
JP-A-1-278605 (page 2, upper right column, line 4 to page 4, upper right column, line 12; page 4, lower right column, line 13 to page 5, upper right column, line 14)

  However, the weight of the bar feeder 12 measured together with the weight of the new material using the load cell 15 is much heavier than the weight of the new material. Therefore, the weighing range of the load cell 15 needs to cover from a relatively light new material weight order to a very heavy bar feeder 12 weight order. For this reason, the measuring means for pavement materials in the conventional pavement machine does not have a very good measurement accuracy at the weight level of relatively light pavement materials, and can accurately measure the weight of pavement materials much lighter than the tare weight. There wasn't.

The present invention has been made to solve such problems,
A flight bar having a bottom plate to which pavement material is supplied and a flight bar fixed at a predetermined interval between the pair of loop transmission members and moving along the upper surface of the bottom plate with circulation of the pair of loop transmission members The transport device supported by the traveling vehicle for transporting the pavement material supplied on the bottom plate along the upper surface of the bottom plate,
A first cutout is provided in a first cutout portion formed by cutting out a part of the bottom plate located on the upstream side of the conveying flow from the pavement supply position, and is located on the same plane as the top surface of the bottomplate. A first weighing plate having a weighing surface;
A second notch is provided in a second notch formed by notching a part of the bottom plate located on the downstream side of the conveying flow from the pavement supply position, and is located on the same plane as the upper surface of the bottom plate. A second weighing plate having a weighing surface;
First weighing means for weighing a load applied to the first weighing surface;
A second measuring means for measuring a load applied to the second measuring surface;
The pavement machine is configured to include a calculation unit that subtracts the load measured by the first measurement unit from the load measured by the second measurement unit.

  According to this configuration, the first measuring means located upstream from the pavement supply position causes the first measuring surface to pass through the flight bar by the tension of the loop transmission body, the weight of the flight bar itself, and the like. The total load of the load and the load of the first weighing plate itself is measured as a tare weight. Further, the second weighing means located downstream of the pavement supply position causes a load applied to the second measurement surface via the flight bar due to the tension of the loop-shaped transmission body and the weight of the flight bar itself, The total load of the load of the second weighing plate itself and the load of the pavement conveyed is measured. Here, by setting the weight of the first measuring plate itself and the weight of the second measuring plate itself to be equal, the load of the pavement material to be conveyed is measured by the second measuring unit by the calculating unit. It is calculated by subtracting the load corresponding to the tare weight measured by the first weighing means from the measured load.

  According to the paving machine according to the present invention, the tare weight measured by the first weighing means is not much heavier than the weight of the paving material to be conveyed, as in the conventional bar feeder. The weighing range of each of the first and second weighing means need not be covered to the order of the weight of a conventional very heavy bar feeder. For this reason, the measurement precision in the weight grade of the pavement material conveyed of each measurement means can be raised, and the weight of the pavement material conveyed can be measured with higher accuracy than before.

  Next, the best mode for carrying out the present invention will be described.

  FIG. 2 is a side view showing an outline of the configuration of the road regeneration road pavement machine (remixer) 2 according to the present embodiment.

  As shown in the figure, the road regeneration road pavement machine 2 is provided with front wheels 27a, 27a and rear wheels 27b, 27b in front and rear of the traveling vehicle 21, and the traveling vehicle 21 includes front wheels 27a, 27a and rear wheels. It is supported on the ground by the rings 27b and 27b. An operation unit 28 and a seat 29 are provided above the screed devices 26 a and 26 b at the rear end of the traveling vehicle 21. The operation unit 28 is provided with a lever, a switch, and the like for operating the traveling vehicle 21 and the screed devices 26a and 26b.

  Further, the road regeneration road pavement machine 2 is provided with a hopper 3 that is supported above the front portion of the traveling vehicle 21 and accommodates a new material of asphalt mixture that is a pavement material. The hopper 3 receives the supply of the pavement material from the loading platform of the dump truck via another vehicle that runs in front of the road regeneration road pavement machine 2. The traveling vehicle 21 below the hopper 3 is provided with a bar feeder 4 that is a pavement conveying device. The bar feeder 4 has a front end portion located immediately below the hopper 3, a rear end portion extending to the rear side of the traveling vehicle 21, and located in front of the operation portion 28. In the present embodiment, the bar feeder 4 is provided on the traveling vehicle 21 so as to be inclined so that the position of the rear end portion is higher than the front end portion.

  A collecting device 22 is disposed at the forefront of the traveling vehicle 21 below the hopper 3. The old pavement on the road surface is scraped by a machine that runs in front of the road regeneration road pavement machine 2, and this old scraped pavement is scraped and collected by the collecting device 22 as a recycled material. The collecting device 22 includes a pair of screws on the left and right sides, and the paved pavement is collected by each rotating screw. A feeder 23 is provided behind the collecting device 22. The feeder 23 has a front end extending to the inside of the collecting device 22 and a rear end extending to the inside of the traveling vehicle 21. The recycled material scraped off from the road surface and collected by the feeder 23 is conveyed to the rear of the road regeneration road pavement machine 2 by a measuring feeder located at the rear end of the feeder 23, and the weight is calculated by this measuring feeder. . The weighing feeder has a structure that uses a load cell to measure a load applied to the other end with the one end as a fulcrum.

  The traveling vehicle 21 incorporates a panel heater and a pug mill mixer (not shown). The panel heater heats the bottom of the pug mill mixer. The recycled material conveyed by the weighing feeder and the new material conveyed by the bar feeder 4 are put into a pug mill mixer. An amount of additive calculated based on the weight of the recycled material measured by the measuring feeder and the weight of the new material measured by measuring plates 50 and 52 (to be described later) of the bar feeder 4 is added to the pug mill mixer. The recycled material and the new material become a recycled mixture by being kneaded with the additive in a pug mill mixer.

  From the center of the traveling vehicle 21, a pair of leveling arms 24 and 24 that are pivotally supported on both sides of the traveling vehicle 21 extend rearward. Screw spreaders 25a and 25b are attached to the rear of the traveling vehicle 21, and screed devices 26a and 26b are attached immediately after the screw spreaders, respectively. The screed devices 26 a and 26 b are pulled by the leveling arms 24 and 24. The front screw spreader 25a and the screed device 26a are raised and lowered according to the expansion and contraction of the hydraulic cylinder 30a, and the rear screw spreader 25b and the screed device 26b are raised and lowered, respectively. The hydraulic cylinders 30a and 30b are respectively connected to a hydraulic pump (not shown) provided in the traveling vehicle 21 via a hose, and are driven by supply of pressure oil from the hydraulic pump. The screw spreader 25a squeezes out the regenerated mixture produced by the pug mill mixer and dropped on the ground in the left-right width direction, and the screed device 26a compacts the regenerated mixture squeezed out on the ground to finish the pavement surface smoothly. Further, the screw spreader 25b is conveyed from the hopper 3 and spreads the pavement material dropped on the pavement surface compacted with the regenerated mixture in the left and right width directions, and the screed device 26b is rolled out on the ground. The paved material is compacted on the recycled mixture to finish the paved surface smoothly.

  3 and 4 are diagrams showing an outline of the configuration of the bar feeder 4 constituting the pavement material conveying device, FIG. 3 is a side view thereof, and FIG. 4 is a plan view thereof. 3 and 4, the same or corresponding parts are denoted by the same reference numerals.

  The bar feeder 4 is provided directly below the hopper 3 as described above. The bar feeder 4 is provided inside a rectangular parallelepiped casing 41. The bottom plate (drag pan) 40 of the casing 41 has a predetermined thickness, and serves as a sliding plate when the pavement material accommodated in the hopper 3 is conveyed by the flight bar 45. A driven shaft 42 is attached to the front end of the casing 41, and a drive shaft 43 is attached to the rear end. The driven shaft 42 and the drive shaft 43 are disposed in the casing 41 so as to be parallel to each other. A pair of sprockets 42 a and 42 a are attached to both ends of the driven shaft 42. In addition, two pairs of sprockets, that is, a pair of sprockets 43 a and 43 a located on the inner side and a pair of sprockets 43 b and 43 b located on the outer side, are attached to both ends of the drive shaft 43. A pair of loops are formed between the right sprocket 42a of the driven shaft 42 and the right sprocket 43a of the drive shaft 43, and between the left sprocket 42a of the driven shaft 42 and the left sprocket 43a of the drive shaft 43. A single chain 44 constituting the transmission is laid over each. A plurality of flight bars 45 are bridged and attached between the chains 44 and 44 at predetermined intervals.

  Two chains 44, 44, spanned between the sprockets 42 a, 42 a at both ends of the driven shaft 42 and the sprockets 43 a, 43 a at both ends of the drive shaft 43, have a transport track that moves on the bottom plate 40 of the casing 41. Then, it circulates along the rotation of the drive shaft 43 between the return trajectory passing through the hopper 3 through the upper part of the transport trajectory. Along with the circulation of the pair of chains 44, 44, the flight bar 45 passes directly above the hopper bottom plate 31 of the hopper 3 on the return track and moves directly above the bottom plate 40 of the casing 41 positioned below the hopper 3 on the transfer track. To do. That is, the bar feeder 4 has a circulation track of the flight bar 45 including a transport track for transporting the paving material supplied on the bottom plate 40 along the surface of the bottom plate 40 and a return track passing through the hopper 3. The bar feeder 4 has a bottom plate 40 supported by the traveling vehicle 21 below the hopper 3 and supplied with the pavement material accommodated in the hopper 3, and the pavement material supplied on the bottom plate 40 is separated at a predetermined interval. A transport bar that transports along the upper surface of the bottom plate 40 is configured by a flight bar 45 provided in an open state.

  A hydraulic motor 46 is provided at the upper end on one side of the casing 41 in the vicinity of the drive shaft 43. The hydraulic motor 46 is connected to a hydraulic pump (not shown) provided in the traveling vehicle 21 via a hose, and is driven by supply of pressure oil from the hydraulic pump. A pair of sprockets 46 b are attached to both ends of the rotating shaft 46 a of the hydraulic motor 46. Between the sprocket 43b on the right side of the drive shaft 43 and the sprocket 46b on the right side of the rotation shaft 46a, and between the sprocket 43b on the left side of the drive shaft 43 and the sprocket 46b on the left side of the rotation shaft 46a, one chain 47 are bridged as shown in FIG. Each sprocket 46 b is rotated by the hydraulic motor 46, and the rotation is transmitted to the drive shaft 43 by the chain 47 being transmitted to each sprocket 43 b.

  A pair of attachment pieces 41 a and 41 a are provided below the bottom plate 40 at the front end portion and the rear end portion of the casing 41, respectively. The traveling vehicle 21 is provided with support members 21a and 21a to which the attachment pieces 41a and 41a at the front end portions are attached. In the casing 41, the mounting pieces 41a and 41a at the front end portion are rotatably attached to the support members 21a and 21a by the pins 6, and the pins 7 inserted into the mounting pieces 41a and 41a at the rear end portion are suspended and supported. By doing so, as described above, the rear end portion of the bar feeder 4 is inclined and provided on the traveling vehicle 21 so as to be higher than the front end portion.

  The hopper 3 includes side walls 32 and 32 facing each other across the hopper bottom plate 31. The hopper bottom plate 31 is installed on the traveling vehicle 21 by a hopper support member attached to the traveling vehicle 21, which is located directly below the flight bar 45 of the bar feeder 4 that moves on the circulation track in the return direction. The side walls 32, 32 are attached to a hopper support member so as to be rotatable inward and outward. The hopper support member is located outside the support members 21 a and 21 a of the bar feeder 4. The base end of a tube 35 included in the cylinder 34 is pivotally supported on the hopper support member, and the tip of a rod 36 included in the cylinder 34 is pivotally supported on the side walls 32 and 32, respectively. The tube 35 is connected to a hydraulic pump included in the traveling vehicle 21 via a hose, and receives supply of pressure oil from the hydraulic pump to expand and contract the rod 36 to change the angles of the side walls 32 and 32 with respect to the hopper bottom plate 31.

  Further, as shown in FIG. 4, the bottom plate 40 of the casing 41 is formed with first and second cutout portions 49 and 51 by notching a part of the bottom plate 40. Plates 50 and 52 are provided.

  FIG. 5 is a partially broken side view in which the bar feeder 4 is broken along the conveying direction A indicated by an arrow. In the figure, the upper surface and side surfaces of the casing 41 are not shown. In the figure, the same parts as those in FIGS. 3 and 4 are denoted by the same reference numerals.

  The pavement material 60 supplied from the hopper 3 is dropped in the direction indicated by the arrow from the supply position B located in the center of the figure by the bar feeder 4 moving on the circulation track in the return direction, and onto the bottom plate 40 of the casing 41. get on. A first notch 49 is formed by cutting out a part of the bottom plate 40 on the upstream side (left side in the figure) of the flow of conveyance from the supply position B of the pavement 60. The notch 49 is provided with a first measuring plate 50 having a first measuring surface 50 a located on the same plane as the upper surface 40 a of the bottom plate 40. Further, a second cutout portion 51 is formed by cutting out a part of the bottom plate 40 on the downstream side (right side in the figure) of the conveying flow from the supply position B of the pavement 60. The second notch 51 is provided with a second measuring plate 52 having a second measuring surface 52 a located on the same plane as the upper surface 40 a of the bottom plate 40. The flight bar 45 conveys the pavement 60 supplied from the hopper 3 along the upper surface 40 a of the bottom plate 40 while moving in the conveyance direction A based on the rotation of the drive shaft 43 described above.

  FIG. 6 is a partially enlarged perspective view showing the structure of the first and second cutout portions 49 and 51 and the first and second measuring plates 50 and 52. Each notch 49 and 51 and each measuring plate 50 and 52 have the same structure, and here, these are demonstrated to the same figure. In the figure, the same parts as those in FIG.

  Each weighing plate 50, 52 is provided with a gap 55 of a predetermined distance between each notch 49, 51. As shown in FIG. Compression type load cells 53 are provided in the vicinity of the four corners of the lower surface. These load cells 53 constitute first and second measuring means for measuring the load applied to the first and second measuring surfaces 50a and 52a by converting the deformation of the elastic body into a change in electric resistance. . Each load cell 53 is fixed to a fixed base 54 installed on the traveling vehicle 21. Each weighing plate 50, 52 freely moves in accordance with the compression of the load cell 53 in the direction in which the load of the pavement 60 is applied to each weighing surface 50a, 52a, in the same figure, in the vertical direction. The load cell 53 is electrically connected to a control device (not shown) provided in the traveling vehicle 21. This control device measures the load applied to the first measuring surface 50a from the load measured by the load cell 53 constituting the second measuring means for measuring the load applied to the second measuring surface 52a. The calculation means which calculates the weight of the pavement 60 conveyed along the upper surface 40a of the bottom board 40 is comprised by deducting the load measured by the load cell 53 which comprises a means.

  Next, the operation of the road regeneration road paving machine 2 according to the present embodiment having the above-described configuration will be described.

  The pavement material 60 introduced into the hopper 3 of the road regeneration road pavement machine 2 from another vehicle running in front of the road regeneration road pavement machine 2 is deposited on the hopper bottom plate 31 of the hopper 3. The pavement material 60 accumulated on the hopper bottom plate 31 is scraped out by a predetermined amount by the flight bar 45 moving on the circulation track in the return direction, falls from the supply position B on the front end side of the bar feeder 4, and is on the bottom plate 40. Supplied. The pavement 60 supplied onto the bottom plate 40 is conveyed to the rear end side of the bar feeder 4 on the bottom plate 40 by a flight bar 45 moving on a circulation track in the conveyance direction A.

  According to the road regeneration road pavement machine 2 according to the present embodiment as described above, the tension of the chains 44 and 44 and the flight bar 45 itself are caused by the first measuring plate 50 located upstream of the supply position B of the pavement 60. The total load of the load applied to the first measuring surface 50a via the flight bar 45 and the load of the first measuring plate 50 itself is measured as the tare weight. Further, the second measuring surface 52 located downstream of the supply position B of the pavement 60 is used to provide the second measuring surface via the flight bar 45 by the tension of the chains 44, 44 and the weight of the flight bar 45 itself. The total load of the load applied to 52a, the load of the second weighing plate 52 itself, and the load of the conveyed pavement 60 is measured. Here, by setting the weight of the first weighing plate 50 itself and the weight of the second weighing plate 52 itself to be equal, the load of the pavement material 60 to be conveyed is calculated by the second weighing by the calculating means. It is calculated by subtracting a load corresponding to the tare weight measured by the first measuring plate 50 from the load measured by the plate 52. And the conveyance amount of the pavement material 60 by the bar feeder 4 is based on the calculated load of the pavement material 60, the moving speed in the conveyance track of the flight bar 45, and the specific gravity of the pavement material 60 measured in advance. Calculated.

  For this reason, according to the road regeneration road pavement machine 2 according to the present embodiment, the tare weight measured by the first weighing plate 50 is compared with the weight of the pavement 60 to be conveyed like the conventional bar feeder 12. Thus, since the weight is not much heavier, the weighing range of each load cell 53 need not be covered to the order of the weight of the conventional very heavy bar feeder 12. For this reason, the weighing accuracy of each load cell 53 in the level of the weight of the transported pavement material 60 can be increased, and the weight of the transported pavement material 60 can be measured with higher accuracy than before.

  In addition, the second measuring unit 50 shown in FIG. 5 is located downstream of the supply position B of the pavement 60 without using the first measuring plate 50 located upstream of the supply position B of the pavement 60. A configuration in which the load of the pavement 60 to be conveyed is measured at only one downstream side by using the measuring plate 52 can be considered. In the case of this configuration, the load of the pavement material 60 is obtained by subtracting the weight of the second measurement plate 52 itself measured in advance from the load of the pavement material 60 and the like measured using the second measurement plate 52. Is calculated. However, in this configuration, the load applied to the second measuring surface 52a via the flight bar 45 due to the tension of the chains 44, 44 and the weight of the flight bar 45 itself is not taken into consideration. In addition to the load of the pavement 60, the load applied to the second measurement surface 52a via the flight bar 45 is also measured as an error at the same time, and the load of only the pavement 60 to be detected originally is calculated. Cannot be calculated accurately.

  On the other hand, according to the above-described road regeneration road pavement machine 2 according to the present embodiment, the first weighing plate 50 located on the upstream side of the supply position B of the pavement 60 and the supply position B of the pavement 60 are downstream. Weighing is performed at two locations using both of the second weighing plates 52 located on the side. Therefore, the load applied to the second measuring surface 52a via the flight bar 45 due to the tension of the chains 44, 44 and the weight of the flight bar 45 itself is the first from the load measured by the second measuring plate 52. By subtracting the load measured by the measuring plate 50, the load of the pavement 60 is calculated by subtraction. Therefore, the above-described error does not occur, and the load of only the paving material 60 can be accurately measured.

  In the above-described embodiment, the case where the measurement using the first measurement plate 50 and the measurement using the second measurement plate 52 are performed simultaneously has been described. However, a specific flight bar 45 passes through the first measurement plate 50. Sometimes, the measurement by the first measurement plate 50 may be performed, and then the measurement by the second measurement plate 52 may be performed when the specific flight bar 45 passes through the second measurement plate 52. . With this configuration, the weighing error that occurs when the loads of the flight bars 45 are different, the weighing error that occurs when a different amount of pavement 60 adheres to each flight bar 45, etc. By subtracting the load measured by the first measuring plate 50 from the load measured in step (1), the amount of pavement 60 can be calculated more accurately and with less error.

  In the above embodiment, the case where the weighing structure of the weight of the recycled material collected by the collecting device 22 is different from the weighing structure of the weight of the pavement 60 that is a new material to be put into the hopper 3 is described. The present invention is not limited to this. For example, a feeder that transports recycled material may be provided with a weighing plate similar to that of the above embodiment, and the weight of the recycled material collected by the collecting device 22 may be measured by the same weighing structure as that of the new material. Good.

  In the above embodiment, the case where the paving machine according to the present invention is applied to a remixer has been described. However, other road-reclaimed road paving machines such as a repabe and the like are transported on the weighing surface of the weighing plate by a transport device such as a bar feeder. It is also possible to apply the present invention to other paving machines provided with a weighing means for weighing the paving material. Even when the present invention is applied to such a paving machine, the same effects as those of the above embodiment can be obtained.

It is a figure which illustrates notionally the hopper with which the conventional road surface layer reproducing | regenerating apparatus is provided, and the bar feeder which conveys a new material from this hopper. It is a side view showing an outline of composition of a road reproduction road paving machine by one embodiment of the present invention. It is a side view which shows the outline of a structure of the bar feeder with which the road regeneration road paving machine shown in FIG. 2 is provided. It is a top view which shows the outline of a structure of the bar feeder with which the road regeneration road paving machine shown in FIG. 2 is provided. It is the partially broken side view which fractured | ruptured the bar feeder with which the road regeneration road pavement machine shown in FIG. 2 is provided along the conveyance direction. FIG. 6 is a partially enlarged perspective view showing the structure of the measuring plate shown in FIG. 5.

Explanation of symbols

2 ... Road regeneration road paving machine 3 ... Hopper 4 ... Bar feeder 21 ... Traveling vehicle 40 ... Bottom plate 40a ... Bottom plate 41 ... Casing 44 ... Chain 45 ... Flight bar 49, 51 ... Notch 50, 52 ... First, Second weighing plates 50a, 52a ... 1st and 2nd weighing surfaces 53 ... Load cell 54 ... Fixing table 55 ... Gap 60 ... Paving material

Claims (1)

A bottom plate to which pavement material is supplied, and a flight bar fixed at a predetermined interval between the pair of loop transmission members, and moves along the upper surface of the bottom plate with circulation of the pair of loop transmission members. A conveying device supported by a traveling vehicle that conveys the pavement material supplied on the bottom plate along the upper surface of the bottom plate by a flight bar;
A first cutout portion formed by cutting out a part of the bottom plate located upstream of the conveying flow from the pavement supply position is located on the same plane as the top surface of the bottom plate. A first weighing plate having one weighing surface;
A second notch portion formed by cutting out a part of the bottom plate located on the downstream side of the conveying flow from the pavement supply position is provided on the same surface as the top surface of the bottom plate. A second weighing plate having two weighing surfaces;
First weighing means for weighing a load applied to the first weighing surface;
Second weighing means for weighing a load applied to the second weighing surface;
A pavement machine comprising: calculation means for subtracting the load measured by the first measurement means from the load measured by the second measurement means.

Images