Transport System

Abstract

To provide a transport system for transported objects capable of accurately measuring the weight of scraped cuttings of paved roads on the machine. [Solution] The transport system is applied to, for example, a road surface milling machine 1 that mills the surface of a paved road and transports the cutting waste material to the outside, and a load measuring device 6 capable of measuring load in a dynamic state where there is shaking and vibration is arranged on a belt conveyor 4 that transports the cutting waste material to the outside, and the weight of the cutting waste material transported by the belt conveyor 4 is measured, and the measurement results of the load measuring device 6 are accumulated by a compilation processing device 7, and the accumulated weight of the cutting waste material is displayed on a display device 8. This makes it possible to load the cutting waste material onto the transport vehicle while checking the accumulated weight on the machine, making it possible to load the appropriate amount according to the maximum load capacity.

Description

[Technical Field]

[0001] This invention relates to a conveying system, and more particularly to a conveying system capable of measuring the cumulative weight of an object being conveyed on a conveying route. [Background technology]

[0002] Road cutting work has been known as one of the preventive repair methods for paved roads. Road cutting work involves cutting away and repaving areas (areas that need repair) when continuous unevenness appears on the surface of asphalt pavement, causing the road surface to become extremely uneven. This work aims to restore the road surface shape and skid resistance of the paved road.

[0003] In road cutting work, the sections that need repair are cut away using a self-propelled road cutting machine (known as a road cutter). As is well known, a road cutting machine is equipped with a self-propelled vehicle with front and rear wheels, a cutting machine attached to the vehicle so that it can be raised and lowered, and a conveyor that transports and carries away the road cutting waste (carried material) that has been cut away by the cutting machine. The cutting waste material cut away by the cutting machine is loaded onto a transport vehicle (for example, a dump truck) outside the machine using the conveyor, and then carried by the transport vehicle to a waste disposal site.

[0004] In this series of operations, the transport vehicles used to transport the cuttings have a maximum load capacity, so it is desirable to load as much cuttings as close to the maximum load capacity as possible in each transport. This reduces the total number of transport vehicles required to transport the cuttings, and reduces the cost of road cutting work.

[0005] However, in conventional road cutting work, there was no means of accurately measuring the weight of the cut waste material along the transport route, so the load on the transport vehicle was either estimated visually, or the weight of the cut waste material was calculated and predicted from the road surface cutting distance and the thickness of the pavement to be cut, and the load was determined based on this prediction (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-75489 Summary of the Invention [Problem to be solved by the invention]

[0007] However, such conventional methods have the following problems, and improvements are desired.

[0008] In other words, the conventional method of determining the load on a transport vehicle based on visual estimation or prediction makes it impossible to grasp the exact load. Therefore, in order to avoid overloading, the load must be determined with a target weight less than the maximum load (for example, about 20% less than the maximum load), which poses the problem that the total number of vehicles required to transport the cut waste material for road milling work ends up being greater than the number actually required.

[0009] In this regard, the applicant investigated the weight of the cutting waste material brought to the waste disposal site and found that the weight of the cutting waste material actually brought to the waste disposal site was only about 10 to 40 percent less than the maximum load capacity of the transport vehicle.

[0010] As such, with the conventional method, up to nearly twice the number of transport vehicles actually required for road cutting work (the appropriate number of vehicles) was used, which posed the problem of excessive operating costs for transport vehicles involved in road cutting work (such as human and fuel losses due to the increased number of vehicles, and time losses required to change vehicles).

[0011] The present invention was made in consideration of these problems, and its purpose is to provide a transport system for transported objects that can accurately measure the weight of the scraped pavement material on the machine. [Means for solving the problem]

[0012] In order to achieve the above-mentioned object, the conveying system of the present invention comprises a conveying device that sets a conveying route for conveying the conveyed object, a load measuring device capable of measuring load in a dynamic state where shaking or vibration is present, a calculation processing device that calculates the measurement results of the load measuring device, and a display device that displays the calculation results of the calculation processing device, wherein the load measuring device is attached and fixed to a frame that forms the conveying route in the conveying device, and the calculation processing device calculates the weight of the conveyed object being conveyed on the conveying route, and the calculation result is displayed on the display device.

[0013] According to this invention, a load measuring device capable of measuring loads under dynamic conditions, including the presence of shaking and vibration, is installed on the conveyance path, and the weight of the transported object being transported on the conveyance path is measured by the load measuring device. The measured weight of the transported object is integrated in a calculation processing device, and the integration result is displayed on a display device. Therefore, by checking the integration result (integrated weight value) displayed on the display device, the integrated weight of the transported object being transported on the conveyance path can be accurately determined. Furthermore, because the load measuring device is attached and fixed to a frame that forms the conveyance path of the conveyance device, it can be added to an existing conveyance device as a retrofit. Therefore, by retrofitting an existing conveyance device with a load measuring device, a calculation processing device, and a display device, the existing conveyance device can be used as a conveyance system according to this invention, i.e., a conveyance system that can measure and display the integrated weight of the transported object.

[0014] The transport system according to the present invention has the following configuration as a preferred embodiment.

[0015] (1) The conveying device is in the form of a belt conveyor, and the load measuring device is arranged below the forward belt of the belt conveyor and sequentially measures the weight of the conveyed objects placed on the forward belt and conveyed.

[0016] According to this aspect, the load measuring device is placed below the forward belt of the belt conveyor, so that the empty space that occurs between the forward belt and the return belt due to the structure can be effectively utilized to install the load measuring device on the conveying device.

[0017] (2) The load measuring device is characterized by having a sensor block equipped with a measurement unit that optically measures instantaneous displacement of deflection due to load, a base unit that mounts the sensor block on the conveyor frame, and a top plate that is placed on the sensor block and transmits the load applied to the forward belt to the sensor block.

[0018] According to this aspect, the sensor block equipped with the measurement unit is attached to the conveyor frame via the base unit, so that the load measuring device can be disposed at any position on the conveyance path.

[0019] (3) The top plate is characterized by having a friction buffer mechanism that reduces frictional resistance with the forward belt.

[0020] According to this aspect, a friction buffering mechanism that reduces frictional resistance with the forward belt is disposed on the top plate of the load measuring device, which is disposed below the forward belt, so that measurement errors due to friction with the forward belt can be reduced when measuring the load of the transported object.

[0021] (4) The load measuring device is characterized in that it is disposed in the vicinity of the downstream end of the conveying path.

[0022] According to this aspect, the load measuring device is disposed near the downstream end of the conveying path, so that the weight of the conveyed object can be measured immediately before it is conveyed out of the conveying path.

[0023] (5) The display device is characterized in that it is disposed near an operation unit of the transport device.

[0024] According to this aspect, the conveying device can be operated (started / stopped) while grasping (visually checking) the cumulative weight of the transported objects being transported along the transport path, and the cumulative weight of the transported objects being transported from the conveying device can be accurately adjusted.

[0025] (6) The above-mentioned tallying processing device is characterized by comprising a transmitting means for transmitting the tallying results to an external device.

[0026] According to this aspect, the accumulated weight calculated by the calculation processing device can be transmitted to the outside, so that, for example, by using a mobile terminal such as a tablet terminal as a receiving means, it is possible to grasp the accumulated weight of the transported object being transported to a location away from the transport device. [Effects of the Invention]

[0027] According to this invention, a load measuring device capable of measuring dynamic load is placed on the transport path of the transported object. The weight of the transported object being transported along the transport path is measured by this load measuring device, and the measurement results are accumulated in a calculation processing device and displayed on a display device, so that the accumulated weight of the transported object being transported along the transport path can be accurately determined.

[0028] Therefore, according to this invention, for example, in the process of loading cutting waste material onto a transport vehicle during road cutting work, cutting waste material can be loaded up to the transport vehicle's maximum load capacity, allowing the cutting waste material to be transported using an appropriate number of transport vehicles, making it possible to operate the work while minimizing human loss, fuel loss, time loss, etc. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a side view showing a schematic diagram of a road milling machine to which the conveying system according to the present invention is applied when removing cutting waste material. FIG. [Figure 2] FIG. 2 is an exploded perspective view showing an example of the external configuration of a load measuring device used in the conveyance system. [Figure 3]3(a) and 3(b) are explanatory diagrams showing the schematic configuration of the sensor block of the load measuring device in the conveying system, where FIG. 3(a) is a plan view of the sensor block, FIG. 3(b) is a side view of the sensor block, FIG. 3(c) is an AA cross-sectional view, and FIG. 3(d) is an enlarged partial view of the area surrounded by the dashed line in FIG. 3(b). [Figure 4] 4A, 4B, and 4C are explanatory diagrams showing the schematic configuration of a base unit of a load measuring device in the transport system, with FIG. 4A being a plan view, FIG. 4B being a BB cross-sectional view, and FIG. 4C being a bottom view. [Figure 5] FIG. 2 is a perspective view showing a state in which the load measuring device of the conveying system is attached to a belt conveyor, with the belt cut away. [Figure 6] FIG. 2 is a cross-sectional view of a belt conveyor equipped with a load measuring device of the conveying system. [Figure 7] FIG. 2 is a partially enlarged perspective view showing a part of a belt conveyor to which a load measuring device of the conveying system is attached, with a cutaway portion. DETAILED DESCRIPTION OF THE INVENTION

[0030] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in which like reference numerals denote like components or elements throughout the drawings.

[0031] The conveying system according to the present invention is a device capable of measuring the cumulative weight of an object being conveyed on a conveying route, and is used, for example, in a conveying system for cutting waste material (objects) in a road milling machine used in road cutting work. The following describes an example in which the conveying system is applied to a road milling machine 1.

[0032] The road milling machine 1 is a device that scrapes off the road surface (surface) RS of a paved road such as asphalt pavement in road milling work, which is one of the preventive repair methods for paved roads.As is well known, it mainly comprises a self-propelled vehicle 2 with front and rear wheels, a milling machine 3 attached to the vehicle 2 so that it can be raised and lowered, and a belt conveyor (transport device) 4 that transports and carries out the road surface cutting waste scraped off by the milling machine 3 to the outside of the road milling machine 1 (outside the machine), and the road surface RS cutting waste scraped off by the milling machine 3 is loaded onto a transport vehicle (e.g., a dump truck) DT outside the machine via the belt conveyor 4 (see Figure 1).

[0033] Here, the vehicle 2 is configured as a self-propelled vehicle equipped with a prime mover (not shown) such as a diesel engine. In the example shown in FIG. 1, the vehicle 2 is configured as a vehicle main body 2a equipped with the prime mover, and a working device unit 2b connected to the vehicle main body 2a, and the working device unit 2b is equipped with the above-mentioned cutting machine 3 in a manner that allows it to move up and down. Note that in the example shown, a wheeled vehicle equipped with front and rear wheels is exemplified as the vehicle 2, but as long as it is self-propelled, it may be equipped with caterpillars instead of / in addition to the wheels. Also, the vehicle main body 2a and the working device unit 2b may be configured as a single unit.

[0034] The cutting machine 3 is a cutting machine for cutting away the road surface RS, and in this embodiment, a cutting machine with a drum structure (not shown) is used, in which a plurality of cutting bits are arranged on the outer peripheral surface of a substantially cylindrical drum that is driven to rotate by a prime mover. The working device section 2b is provided with a lifting mechanism (not shown) that raises and lowers this drum mechanism, and is configured so that when cutting the road surface RS, the drum is lowered to a cutting position into the road surface RS.

[0035] The belt conveyor 4 is a conveying device that sets a transport path for transporting and unloading cutting waste material outside the machine. Its base end (upstream side in the transport direction) is positioned facing the cutting machine 3, while its tip end (downstream side in the transport direction) extends outside the road milling machine 1. Specifically, the base end of the belt conveyor 4 is arranged so that cutting waste material scraped by the cutting machine 3 is automatically placed on the forward belt 32a, and the cutting waste material scraped by the cutting machine 3 is sequentially unloaded outside the machine by the belt conveyor 4. The tip end of the belt conveyor 4 also protrudes outside the machine so that cutting waste material dropping from the tip can be stored in the loading platform of the transport vehicle DT. While the illustrated example shows a case where the unloading path for cutting waste material is configured with a single belt conveyor 4, the unloading path may also be configured with two or more belt conveyors 4 arranged in series.

[0036] The road milling machine 1 is provided with an operation panel 5 for operating the above-mentioned milling machine 3 and belt conveyor 4. The operation panel 5 is provided, for example, on the side of the working device section 2b, and by operating the operation panel 5, a user can perform various controls such as starting / stopping the milling machine 3, controlling the rotation speed of the drum mechanism, controlling the elevation of the drum mechanism, and starting / stopping the belt conveyor 4.

[0037] The present invention proposes a conveying system for a road milling machine 1 configured as described above, which has been improved so that the weight of the cutting waste material cut by the cutting machine 3 can be measured on the road milling machine 1.In addition to the belt conveyor 4 described above, the conveying system of the present invention is equipped with a load measuring device 6 that measures the weight of the cutting waste material, a calculation processing device 7 that compiles the measurement results of the load measuring device 6, and a display device 8 that displays the compile results of the calculation processing device 7.

[0038] The load measuring device 6 is a device that measures the weight of the cutting waste material placed on and transported on the forward belt 32a of the belt conveyor 4, and in this embodiment, a load measuring device that can measure loads in dynamic conditions where shaking and vibration are present (for example, the "Dynamic Load Measuring Device" (Patent Nos. 3090686 and 5604200) manufactured by Sensing Kyoto Co., Ltd.) is used. This load measuring device 6 calculates the instantaneous load and acceleration from the instantaneous displacement of the elastic part due to the load applied to the device, and instantaneously measures the weight of the cutting waste material transported by the belt conveyor 4 from these, the vibration acceleration of the device, and the transport speed of the belt conveyor 4.

[0039] 2 shows the load measuring device 6 used in this embodiment. The load measuring device 6 shown in the figure has a sensor block 11 equipped with a measurement unit 14 that optically measures instantaneous displacement of deflection due to load, a base unit 12 that mounts the sensor block 11 on the conveyor frame 35, and a top plate 13 that is placed on the sensor block 11 and transmits the load acting on the forward belt 32a to the sensor block 11.

[0040] As shown in FIGS. 3(a) and 3(b), the sensor block 11 is made of a metal block body having a structure in which a central portion 11a in the longitudinal direction is displaceable in the vertical direction.

[0041] Both ends of the sensor block 11 in the longitudinal direction are fixing portions 11b, 11b that fix the sensor block 11 onto the base unit 12. Each fixing portion 11b has a plurality of (four in the illustrated example) screw holes 15, 15, ... formed therein, and the sensor block 11 is fixed onto the base unit 12 by inserting fixing screws 16, 16, ... into these screw holes 15, 15, ... (see FIG. 2).

[0042] Meanwhile, the central portion 11a of the sensor block 11 has a hollow structure with two horizontal through-holes 11c, 11c that penetrate the sensor block 11 in the short direction, and the underside is in the form of a recessed portion 11d that is slightly recessed upward. As a result, the sensor block 11, whose both longitudinal ends are fixed, is held in a bridge-like state with the central portion 11a floating above the base unit 12, and when a load is applied from above, the central portion 11a bends downward against the elasticity associated with the hollow structure.

[0043] A vertical through-hole 11e penetrating in the up-down direction is formed in the central portion 11a of the sensor block 11, more specifically, in the solid portion formed between the horizontal through-holes 11c, 11c (see FIG. 3(c)). This vertical through-hole 11e is a hole through which a connecting bolt 17 is inserted to connect the sensor block 11 and the top plate 13. As shown in FIG. 2, the top plate 13 is attached to the connecting bolt 17 that passes through this vertical through-hole 11e and protrudes. The upper end of this vertical through-hole 11e is formed as an action portion 11h that protrudes upward in a circular ring shape around the hole, and a load applied to the top plate 13 acts on the sensor block 11 via this action portion 11h.

[0044] Further, recessed portions 11f and 11g are formed on the side surface of the sensor block 11 for mounting a measurement unit 14. The measurement unit 14 is a unit that optically measures the instantaneous displacement of the deflection of the sensor block 11 due to a load, and includes a sensor arm 18 and a wide mask 19. The sensor arm 18 is an arm-shaped member whose base end is mounted in (either one of) recessed portions 11f formed in the fixed portion 11b to form a fixed end, and whose tip end is a free end, and is equipped with an optical sensor (not shown) at its tip. Meanwhile, the wide mask 19 is a mask equipped with a light-emitting portion and a thin light-emitting hole (not shown), and is mounted in the recessed portion 11g in the center portion 11a.

[0045] As a result, the optical sensor of the sensor arm 18 detects the position change (instantaneous displacement) of the wide mask 19 when the center portion 11a of the sensor block 11 receives a load and bends vertically (downward).The sensor block 11 is equipped with an arithmetic processing unit (not shown), which instantaneously measures the load (weight) acting on the sensor block 11 based on the instantaneous displacement measured by the measurement unit 14 and the vibration acceleration obtained by an acceleration sensor (not shown, for example, an acceleration sensor attached to the base unit 12).

[0046] The base unit 12 is a metal member for retrofitting the sensor block 11 to the conveyor frame 35, and as shown in Figure 4, has a sensor housing section 21 that houses the sensor block 11, and a base section 22 that mounts the sensor housing section 21 to the base bracket 28 described below.

[0047] As shown in FIGS. 4(a) and 4(b), the sensor housing 21 has a generally rectangular box shape with an open top, and in the illustrated example, the sensor housing 21 is configured to house two sensor blocks 11. More specifically, as shown in FIG. 2, the two sensor blocks 11 are arranged side by side in the short direction of the sensor housing 21. The hatched area 21a in FIG. 4(a) is the location of the fixing portion 11b of the sensor block 11, and the fixing portion 11b of the sensor block 11 is fixed to this area with screws. Furthermore, reference numeral 21b denotes a through hole that communicates with the vertical through hole 11e of the sensor block 11, and a connecting bolt 17 is attached to this through hole 21b from below.

[0048] The base unit 22 is a member that constitutes a base for mounting the sensor accommodating unit 21 to the base bracket 28, and in this embodiment is configured as a frame formed in a substantially V-shape. A U-shaped notch 22a is formed at the end on the pointed side of the V to allow insertion of the bolt 29 of the base bracket 28 for mounting, while through holes 22b, 22b are formed at the open end that opens into two, through which the bolt 29 of the base bracket 28 is inserted. In FIG. 4(c), reference numeral 22c denotes a through hole that communicates with the through hole 21b of the sensor accommodating unit 21.

[0049] The top plate 13 transmits the load applied to the forward belt 32a to the sensor block 11, and as shown in Figure 2, has as its main parts a cover body 25 and a friction buffer mechanism 26 provided on the cover body 25.

[0050] Lid 25 is a metal member that forms the lid of sensor housing portion 21, and by attaching lid 25 to the opening of sensor housing portion 21, sensor block 11 is housed inside sensor housing portion 21. This makes it possible to measure load without being affected by dust even in a dusty environment such as soil. In addition, a screw hole (not shown) is provided on the back surface (lower surface) of lid 25, and connecting bolt 17 is fitted into this screw hole.

[0051] The friction buffering mechanism 26 is a mechanism for reducing frictional resistance during sliding contact between the forward belt 32a of the belt conveyor 4 and the top plate 13. In this embodiment, the mechanism is configured by a plurality of rotating rollers 27 arranged on the top surface of the top plate 13. More specifically, each of the rotating rollers 27 is rotatably supported via bearings (not shown). The rotating rollers 27 rotate in the direction of travel of the forward belt 32a through sliding contact with the forward belt 32a, thereby reducing frictional resistance. While the friction buffering mechanism 26 in this embodiment uses a plurality of rotating rollers 27, other mechanisms, such as spherical bearings, can be used as long as they can reduce frictional resistance with the forward belt 32a. While the illustrated example shows two rows of rotating rollers 27 arranged to correspond to the arrangement of the sensor blocks 11, a single row of rotating rollers 27 may be used.

[0052] 5 shows the load measuring device 6 attached near the tip of the belt conveyor 4 (at a position near the downstream tip of the conveying path for the cutting waste material) (position X in FIG. 1). As shown in the figure, the load measuring device 6 is placed below the forward belt 32a of the belt conveyor 4, and sequentially measures the weight of the cutting waste material placed on the forward belt 32a and conveyed.

[0053] Here, the structure of the belt conveyor 4 will be briefly explained with reference to FIG. As is well known, the belt conveyor 4 is a device that conveys conveyed objects (cutting waste material in this embodiment) placed on a conveying belt 32 by rotating the conveying belt 32 around a head pulley 31 and a tail pulley (not shown), and a plurality of pulleys, such as a carrier roller 33 that supports the forward belt 32a and a return roller 34 that supports the return belt 32b, are arranged between the head pulley 31 and the tail pulley. These pulleys are attached to a conveyor frame 35 that forms the belt conveyor 4, and all of the pulleys other than the drive pulley (for example, the tail pulley) are mounted on the conveyor frame 35 so as to be freely rotatable.

[0054] In the illustrated example, a stringer frame is used as the conveyor frame 35, in which a pair of vertical frames 35a, 35a made of steel are arranged in the conveying direction and multiple horizontal frames 35b, 35b, ... made of steel are arranged between the vertical frames 35a, 35a. However, a truss frame in which a truss is assembled from steel may also be used. Also, in the illustrated example, a structure in which rollers are arranged in a V-shape as the carrier roller 33 is shown, but the carrier roller 33 may also be arranged horizontally. Reference numeral 36 in the figure indicates a support frame that supports a cover (not shown) that covers the belt conveyor 4.

[0055] In this embodiment, the conveyor frame 35 of the belt conveyor 4 configured as described above is equipped with a load measuring device 6. Specifically, the load measuring device 6 is disposed in the empty space formed between the horizontal frames 35b, 35b near the leading end of the belt conveyor 4.

[0056] When installing the load measuring device 6, first, the base bracket 28 is attached to the conveyor frame 35. The base bracket 28 is a member that serves as a base for attaching the base unit 12 of the load measuring device 6 to the conveyor frame 35. In this embodiment, an L-shaped steel is used as the base bracket 28, and this L-shaped steel is welded and fixed to the conveyor frame 35 (horizontal frame 35b in the illustrated example).

[0057] The base bracket 28 is a metal fitting with a bolt 29 for attaching the base unit welded in an upright position on one side, and is attached to the conveyor frame 35 so that the bolt 29 stands upright. In this embodiment, the base part 22 of the base unit 12 is formed with a notch 22a and through holes 22b, 22b that engage with the bolt 29, so three base brackets 28 are attached to the conveyor frame 35 corresponding to this.

[0058] When attaching the base unit 12, the notch 22a formed on the pointed side of the base portion 22 is inserted onto the bolt 29 of one base bracket 28, while the two through holes 22b, 22b formed on the open side are inserted onto the bolts 29, 29 of the other base bracket 28, 28, respectively, and finally nuts are attached to each of the bolts 29, 29, 29, thereby fixing the base unit 12 to the conveyor frame 35. Note that, during this attachment, the height position of the base unit 12 can be adjusted, for example, by interposing a spacer (not shown) between the base bracket 28 and the base unit 12. This height adjustment makes it possible to adjust the contact state between the friction buffer mechanism 26 and the forward belt 32a, and to position the base unit 12 at a height suitable for load measurement by the sensor block 11.

[0059] As a result, as shown in Figure 6, a load measuring device 6 is installed and fixed below the forward belt 32a as an afterthought, and as the cutting waste material transported by the belt conveyor 4 passes over the load measuring device 6, the weight of the passing cutting waste material is instantly measured by the calculation processing unit of the load measuring device 6.

[0060] The tallying processor 7 is a processing device electrically connected to the calculation processing section of the load measuring device 6, and is composed of a microcomputer having a control program that performs the accumulating process described below, display control of the display device 8, etc. In this embodiment, the tallying processor 7 is equipped in the work device section 2b, and is configured to tally the weight of the cutting waste material calculated by the calculation processing section of the load measuring device 6. In other words, the tallying processor 7 instantaneously tally the weight of the cutting waste material that is continuously transported by the belt conveyor 4 on board the road milling machine 1, and calculates the accumulated weight of the cutting waste material that is carried out by the belt conveyor 4.

[0061] The display device 8 is a device that displays the results of the compilation by the compilation processing device 7, and in this embodiment is configured as a display device electrically connected to the compilation processing device 7, such as an LCD display, and displays the accumulated weight of the cutting waste material compiled by the compilation processing device 7. In addition, in this embodiment, the display device 8 is placed near the operation panel 5 that constitutes the operation unit of the belt conveyor 4, so that the operator of the road milling machine 1 can operate the operation panel 5 while visually checking the accumulated weight displayed on the display device 8. In other words, the operator of the road milling machine 1 can perform loading work while checking the accumulated weight of the cutting waste material to be loaded onto the transport vehicle DT via the belt conveyor 4, and the operator of the road milling machine 1 can control the load capacity of the transport vehicle DT to an optimal load capacity according to the maximum load capacity.

[0062] Next, road cutting work using the road surface cutting machine 1 configured as above will be described with reference to FIG.

[0063] In the road milling work according to the present invention, the road surface RS of the paved road is milled while the road milling machine 1 is self-propelled. In the illustrated example, a transport vehicle DT is positioned ahead in the direction of travel F, and the transport vehicle DT is moved forward in accordance with the progress of the road milling machine 1.

[0064] When moving forward, the operator of the road milling machine 1 operates the control panel 5 to start the cutter 3, set the height position of the cutter 3 (drum mechanism), and start the belt conveyor 4. As a result, as the road milling machine 1 moves forward, the cutter 3 begins cutting the road surface RS of the paved road, and the cutting waste material scraped off by the cutter 3 is continuously placed on the base end of the belt conveyor 4. The cutting waste material placed on the belt conveyor 4 is then transported towards the tip of the belt conveyor 4, and as it reaches the tip, it falls in order and is loaded onto the loading platform of the transport vehicle DT.

[0065] At this time, the road surface milling machine 1 has a load measuring device 6 placed directly below the belt 32 on the conveying path set by the belt conveyor 4 (in this embodiment, near the tip of the belt conveyor 4), so the weight of the cutting waste material being transported on the conveying path is continuously measured by the load measuring device 6, and the measured weight is accumulated by the calculation processing device 7, and the accumulated weight of the cutting waste material is displayed on the display device 8.

[0066] Therefore, the operator of the road milling machine 1 can accurately grasp the load amount on the transport vehicle DT by checking the calculation results displayed on the display device 8. Therefore, with the road milling machine 1 equipped with the transport system according to the present invention, the operator of the road milling machine 1 can load cutting waste material up to the maximum load capacity of the transport vehicle DT by checking the display device 8 when loading cutting waste material onto the transport vehicle DT (can control the load amount). As a result, with regard to the operation of transport vehicles DT in road milling work, it is possible to operate with an appropriate number of transport vehicles DT, minimizing human loss, fuel loss, time loss, etc., and significantly reduce the costs associated with road milling work.

[0067] The above-described embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to these, and various design modifications are possible within the scope of the present invention.

[0068] For example, in the above-described embodiment, the load measuring device 6 is placed near the downstream end of the belt conveyor 4 (position indicated by symbol X in Figure 1), but the load measuring device 6 may be placed anywhere on the route along which the cutting waste material is transported, and it may also be placed, for example, in the middle of the belt conveyor 4 or near the upstream end of the belt conveyor 4 close to the cutting machine 3.

[0069] Furthermore, in the above-described embodiment, the display device 8 is placed near the operation panel 5, but the location of the display device 8 can be changed as appropriate. For example, it can be placed in the driver's seat of the road milling machine 1. Furthermore, in the above-described embodiment, the tallying device 7 and the display device 8 are connected by wire, but by providing the tallying device 7 with a wireless communication device (transmission means) that transmits the tallying results to the outside, the display device 8 can be placed outside the road milling machine 1. Furthermore, it is also possible to use, as the display device 8, for example, the display unit of a smartphone or tablet terminal, which is a portable terminal device capable of wireless communication.

[0070] In the above-described embodiment, the sensor block 11 of the load measuring device 6 is a block body having fixed portions 11b, 11b at both longitudinal ends and a central portion 11a that is vertically displaceable. However, for example, the sensor block 11 may be a cantilevered block body having only one longitudinal end as a fixed portion. In the above-described embodiment, the instantaneous vertical displacement due to a load is detected by the wide mask 19 and the optical sensor of the sensor arm 18. However, the instantaneous displacement due to a load can also be detected by other methods. In short, a load measuring device 6 having a different configuration can be used as long as it is capable of measuring a load in a dynamic state where fluctuations and vibrations are present.

[0071] Furthermore, in the above-described embodiment, the conveying system according to the present invention is shown as being applied to a road cutting machine used in road cutting work, but the conveying system according to the present invention can of course also be applied to devices and structures other than road cutting machines, and the objects to be conveyed by the conveying system are not limited to cutting waste materials but can be changed as appropriate.

[0072] In addition, in the above-described embodiment, the load measuring device 6 is configured such that the base bracket 28 is attached to the conveyor frame 35 and the base unit 12 of the load measuring device 6 is mounted on this base bracket 28, but the load measuring device 6 may be attached to the belt conveyor 4 using any other structure as long as it is configured to be attached and fixed to the frame of the conveyor that constitutes the transport path. [Explanation of symbols]

[0073] 1 Road milling machine 2 vehicles 2a Vehicle body 2b Working equipment section 3 cutting machine 4 Belt conveyor (transport device) 5 Control panel 6 Load measuring device 7. Data collection and processing device 8 Display device 11 Sensor Block 12 Base Unit 13 Top Plate 14 Measuring Unit 18 Sensor arm 19 Wide Mask 21 Sensor housing 22 Base 25 Lid 26 Friction buffer mechanism 28 Base bracket 31 Head pulley 32 Belt 32a Outbound belt 32b Return belt 33 Carrier roller RS road surface (surface) DT transport vehicle

Claims

1. A conveying device that sets a conveying path for conveying an object to be conveyed; A load measuring device capable of measuring loads in a dynamic state where shaking or vibration is present; a counting processing device that counts the measurement results of the load measuring device; a display device that displays the tallying result of the tallying processing device, The load measuring device is attached and fixed to a frame constituting the transport path in the transport device, and the weight of the transported object transported on the transport path is integrated in the tallying processing device, and the integrated result is displayed on the display device. A transport system comprising:

2. The conveying device is in the form of a belt conveyor; The load measuring device is disposed under the forward belt of the belt conveyor and sequentially measures the weight of the objects placed on the forward belt and transported.

2. The transport system according to claim 1.

3. The load measuring device includes a sensor block equipped with a measurement unit that optically measures instantaneous displacement of deflection due to a load, a base unit that mounts the sensor block to a conveyor frame, and a top plate that is disposed on the sensor block and transmits the load applied to the forward belt to the sensor block.

3. The transport system according to claim 2.

4. The top plate is provided with a friction buffer mechanism for reducing frictional resistance with the forward belt.

4. The transport system according to claim 3.

5. The load measuring device is disposed in the vicinity of the downstream end of the conveying path.

5. The transport system according to claim 2, wherein the transport system is a conveyor.

6. The display device is disposed near an operation unit of the transport device.

5. The transport system according to claim 2, wherein the transport system is a conveyor.

7. The tallying processing device includes a transmitting means for transmitting the tallying results to an external device.

5. The transport system according to claim 2, wherein the transport system is a conveyor.

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