JP2012111411A - Truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an occurrence of a load spill by improving loading balance of load.SOLUTION: Marker lines 21 which are to be references for improving the loading balance when a loading section 4 of a vessel 3 is loaded with crushed stones 100. These marker lines 21 include: a loading apex mark 22 extending in the lateral direction over an inner surface and outer surface of respective side plates 4B and a surface of a bottom plate 4A in the loading section 4 of the vessel 3, for indicating an apex position in the longitudinal direction, of the crushed stones 100 which is loaded; laterally central position mark 23 extending in the longitudinal direction of the bottom plate 4A, front plate 4C and a top plate 5A of a cover section 5, for indicating the central position in the lateral direction in a loaded state; and a loading rear end mark 24 extending in the lateral direction on a rear end side of the bottom plate 4A, for indicating a load spilling prevention position for the crushed stones 100.

Description

  The present invention relates to a large transport vehicle that is suitably used for transporting, for example, open-pit mines, quarries, crushed stones mined in mines, or excavated earth and sand.

  In general, a large transport vehicle called a dump truck has a vessel (loading platform) that can be raised and lowered on the frame of the vehicle body, and a large amount of cargo to be transported (for example, crushed stone or earth and sand) is loaded on the vessel. Thus, the baggage is transported (see, for example, Patent Documents 1 and 2).

JP 2001-105956 A Japanese Utility Model Publication No. 61-196137

  By the way, the above-described transport vehicle according to the prior art often loads a load made of crushed stone or earth and sand on a loading platform in a heaping state. For this reason, if the load balance of the load is deteriorated even a little during the work of loading the load on the loading platform, there is a high possibility that the load at this time will be spilled during transportation.

  On the other hand, in the prior art described in Patent Document 2, a mark serving as a guide for loading work using a bucket is provided on the loading platform side of the vehicle. However, the mark in this case is provided outside the loading platform so as to be used for the alignment of the bucket. For this reason, the load balance in a state where a predetermined rated amount of load is loaded on the loading platform is not always considered sufficiently.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a transport vehicle that improves the load balance of loads and can more effectively prevent the occurrence of spillage. Is to provide.

  In order to solve the above-described problems, the present invention provides a self-propelled vehicle body, a cargo bed that is tiltably provided on the vehicle body and on which a cargo to be transported is loaded, and is located on the front side of the cargo bed. A cab that is provided and defines a driver's cab; and a hoist cylinder that is extendable between the vehicle body and the cargo bed and extends when the cargo is discharged from the cargo bed to incline the cargo bed at an angle. The loading platform has a loading portion formed as a container for loading the load, and a flange portion provided on the front upper portion of the loading portion and covering the cab from above, and the loading portion includes the loading portion. The present invention is applied to a transport vehicle that includes a bottom plate that forms the bottom surface of the portion, and left and right side plates that are erected upward from both left and right ends of the bottom plate.

  A feature of the configuration adopted by the invention of claim 1 is that the loading platform is provided with a mark line serving as a reference for improving the load balance when loading the load, and the mark line is the left, Extends left and right across the inner side and / or outer side of the right side plate and the surface of the bottom plate, and displays the apex position in the front and rear direction of the load with the load loaded in the loading section And a loading rear end mark that is located on the rear end side of the bottom plate and extends in the left and right directions and displays a load spill prevention position of the load.

  According to a second aspect of the present invention, the mark line extends in the left and right directions over the inner side surface and / or outer side surface of the left and right side plates and the surface of the bottom plate to match the load apex mark. Before and after displaying the center of gravity position in the rear direction in a state of being loaded on the loading unit, and including a rear center of gravity position mark.

  According to a third aspect of the present invention, the mark line extends in the front and rear directions over the bottom plate, the front plate, and the flange, and displays left and right center position marks of the left and right sides of the cargo bed. Is included.

  According to a fourth aspect of the present invention, the mark line is formed on the rear end side of the bottom plate as an arrow in contact with the loading rear end mark to prevent the load from spilling from the rear end side of the bottom plate. Consists of spill prevention marks.

  According to a fifth aspect of the present invention, the mark line is formed on the collar as an arrow in contact with a boundary position between the loading section and the collar, and the load is loaded on the collar. It includes a collar loading prevention mark that prevents the

  As described above, according to the first aspect of the present invention, the mark line composed of the load apex mark and the loading rear end mark is provided in the loading portion of the loading platform. The target luggage can be loaded on the loading platform, the load balance on the loading platform can be improved, and spillage during transportation can be effectively prevented. The load apex mark may be formed by a mark line extending in the left and right directions over the inner side surface and / or outer side surface of the left and right side plates and the surface of the bottom plate, and the load apex mark of the load loaded on the loading portion of the loading platform. The vertex position in the forward and backward directions can be displayed. The loading rear end mark can be formed by a mark line that is located on the rear end side of the bottom plate and extends in the left and right directions, and can indicate a load spill prevention position. As a result, the load to be transported can be loaded in a well-balanced manner on the loading portion of the loading platform using the loading apex mark and the loading end mark as a guide.

  According to the invention of claim 2, the center of gravity position in the front and rear directions in a state where the load is loaded on the loading portion in accordance with the load apex mark is defined as the inner side surface and / or outer side surface of each side plate and the surface of the bottom plate. The front and rear center of gravity position marks extending in the left and right directions can be displayed, and the load to be transported can be loaded on the loading portion in a balanced manner with reference to the front and rear center of gravity positions.

  In the invention of claim 3, the left and right center positions of the loading platform can be displayed by left and right center position marks extending in the front and rear directions across the bottom plate, front plate and heel of the loading section. The load to be transported can be loaded in a balanced manner with the center position in the right direction as a reference.

  According to the invention of claim 4, the load spill prevention mark for preventing the load from spilling from the rear end side of the bottom plate can be formed as an arrow in contact with the loading rear end mark on the rear end side of the bottom plate. With this load spill prevention mark, it is possible to prompt the load loading operation to be performed at a position in front of the load trailing end mark, and the occurrence of load spillage can be prevented more effectively.

  In the invention of claim 5, the loading operation of the load can be urged to be performed at a position on the rear side of the loading platform by the loading lock prevention mark, and the load is loaded on the loading platform. Can be prevented.

It is a work state figure which shows the state which loads a load from back on the dump truck by the 1st Embodiment of this invention. It is another work state figure which shows the state which loads a load from the side of a dump truck. It is a front view which shows the vessel of a dump truck as a single unit. It is sectional drawing which looked at the vessel | bessel of the dump truck from the arrow IV-IV direction in FIG. It is the perspective view which expanded the vessel of FIG. 3 from diagonally backward. It is a front view which shows the vessel by 2nd Embodiment. It is the perspective view which expanded the vessel of FIG. 6 from diagonally backward.

  Hereinafter, a dump truck for transporting crushed stone mined in a mine will be described as an example of a transport vehicle according to an embodiment of the present invention, and will be described in detail according to the accompanying drawings.

  1 to 5 show a first embodiment of the present invention. In the figure, reference numeral 1 denotes a dump truck which is a large transport vehicle. The dump truck 1 tilts (undulates) on a vehicle body 2 having a sturdy frame structure as shown in FIGS. It is roughly constituted by a vessel 3 as a loading platform that can be mounted.

  The vessel 3 has a total length of 10 to 13 meters. The vessel 3 is provided integrally with a loading portion 4 formed as a large container for loading a large amount of heavy cargo (hereinafter referred to as a crushed stone 100) such as a crushed stone, and a front upper portion of the loading portion 4, which will be described later. And a flange 5 that covers the cab 8 from above. Further, an elastic pad 6 for absorbing vibration is provided on the lower surface side of the stacking portion 4 as shown in FIG. The elastic pad 6 cushions vibrations when the crushed stone 100 is loaded on the vessel 3 from being transmitted to the frame side of the vehicle body 2 and also prevents vibrations during traveling on the road from being transmitted to the vessel 3.

  As shown in FIGS. 4 and 5, the stacking portion 4 of the vessel 3 is made up of a bottom plate 4A made of a rectangular plate material that forms the bottom surface of the stacking portion 4, and standing upward from both left and right side ends of the bottom plate 4A. Left and right side plates 4B and 4B, and a front plate 4C extending upward from the front end side of the bottom plate 4A to the position of the flange 5 and having left and right both ends joined to the side plates 4B. . As shown in FIG. 5, the collar portion 5 includes a top plate 5 </ b> A.

  A bracket portion 3A is provided at the rear bottom portion of the vessel 3 so as to be located on the lower surface side of the bottom plate 4A, and a pin hole 3B into which a connecting pin 7 described later is inserted is formed in the bracket portion 3A. Yes. That is, as shown in FIG. 1, the rear bottom portion of the vessel 3 is connected to the rear end side of the vehicle body 2 via the connection pin 7 so as to be tiltable. Thereby, the vessel 3 is rotatably supported by using the connecting pin 7 on the rear side of the vehicle body 2.

  Here, the front side (the flange 5 side) of the vessel 3 is rotated (lifted) up and down with the position of the connecting pin 7 as a fulcrum by extending or reducing a hoist cylinder 12 described later. . The vessel 3 is rotated from the transport position shown in FIG. 1 to a discharge position inclined obliquely rearward. At this discharge position, a large amount of crushed stone 100 loaded on the vessel 3 is discharged to a predetermined unloading site so as to slide down from the vessel 3 inclined backward.

  Reference numeral 8 denotes a cab that is provided on the front side of the vehicle body 2 and is located on the lower side of the flange portion 5. The cab 8 forms a driver's cab where an operator of the dump truck 1 gets on and off, and a driver's seat, an accelerator pedal, a brake pedal, a steering handle, an engine switch, and an operation lever (none of which are shown) are included therein. Is provided. The flange portion 5 of the vessel 3 has a function of protecting the cab 8 from flying stones such as rocks by covering the cab 8 from the upper side almost completely, and also protecting the operator in the cab 8 when the dump truck 1 falls. It is what you are doing.

  Reference numeral 9 denotes left and right front wheels (only one is shown) rotatably provided on the front side of the vehicle body 2. These front wheels 9 constitute a steered wheel that is steered by an operator of the dump truck 1. The front wheel 9 is formed with a tire diameter (outer diameter dimension) of, for example, 2 to 4 meters, similarly to the rear wheel 10 described later. A front suspension 9A is provided between the front part of the vehicle body 2 and the front wheel 9, and the front suspension 9A suspends the front part side of the vehicle body 2 from the front wheel 9 to buffer the vibration of the vehicle body 2. It is.

  Reference numeral 10 denotes left and right rear wheels rotatably provided on the rear side of the vehicle body 2. These rear wheels 10 constitute drive wheels of the dump truck 1 and are rotationally driven by a travel drive device (not shown). A pair of rear suspensions 10A is provided between the left and right rear wheels 10 and the rear part of the vehicle body 2 as shown in FIG. This rear suspension 10A suspends the rear side of the vehicle body 2 with respect to the left and right rear wheels 10 to buffer the vibration of the vehicle body 2.

  Reference numeral 11 denotes an engine as a prime mover. The engine 11 is composed of a large diesel engine. The engine 11 is located on the lower side of the cab 8 and is provided on the front side of the vehicle body 2, and rotationally drives a hydraulic pump that is a hydraulic source and an alternator (not shown) for power generation.

  Reference numeral 12 denotes a pair of left and right hoist cylinders which are provided between the vehicle body 2 and the vessel 3 so as to be extendable and contractible. This hoist cylinder 12 consists of a multistage hydraulic cylinder as shown in FIG. 1, and arrange | positions the vessel 3 in a conveyance position in the state which always reduced. When the hoist cylinder 12 extends, the vessel 3 is inclined obliquely rearward with the connecting pin 7 as a fulcrum, and is disposed at the load discharge position.

  Next, reference numeral 13 denotes a large hydraulic excavator, and the hydraulic excavator 13 is formed with a total height larger than that of the dump truck 1 in order to load the crushed stone 100 on the dump truck 1 as shown in FIGS. ing. The hydraulic excavator 13 is provided with a track-type lower traveling body 14, an upper revolving body 15 that is turnably mounted on the lower traveling body 14, and a vertical movement on the front side of the upper revolving body 15. And a working device 16 including a boom 16A, an arm 16B, and a bucket 16C.

  The upper revolving structure 15 is located on the left side of the front portion of the building cover 18, the revolving frame 17, the building cover 18 provided on the revolving frame 17 and accommodating the engine, the hydraulic pump (not shown) and the like. The cab 19 is provided on the revolving frame 17 and defines a driver's cab inside. The counter weight 20 is mounted on the rear end side of the revolving frame 17 and is located on the rear side of the building cover 18. ing.

  Next, the mark line 21 provided in the vessel 3 of the dump truck 1 employed in the first embodiment will be described with reference to FIGS.

  In a state where the rated amount of crushed stone 100 is loaded on the vessel 3, the total center of gravity G of the crushed stone 100 and the vessel 3 combined is represented by XX line, YY line, and X-ray line as shown in FIGS. 3 and 4. Expressed as the intersection of ZZ lines. The XX line is an axis extending horizontally in the front and rear directions of the vehicle, the YY line is another axis extending horizontally in the left and right directions of the vehicle, and the ZZ line is on the ground. It is a vertical axis extending vertically upward and downward.

  The Z1-Z1 line is a vertical axis that is moved in parallel forward by a predetermined dimension L with respect to the ZZ line. When the crushed stone 100 is loaded on the vessel 3, the position where the position of the load vertex T on the Z1-Z1 line is effective for preventing the spillage is determined based on experimental data or the like. is there. The mark line 21 includes a load apex mark 22, a left and right center position mark 23, a loading rear end mark 24, a load spill prevention mark 25, and a top plate loading prevention mark 26, which will be described later.

  Reference numeral 22 denotes a load apex mark forming a part of the mark line 21, and the load apex mark 22 is formed on the inner side surface, the outer side surface and the bottom plate 4A of each side plate 4B of the loading portion 4 of the vessel 3, as shown in FIG. By applying the paint in a straight line over the surface, it is formed as a dotted line mark extending in the left and right directions. The extension portions 22A extending to the left and right sides of the load vertex mark 22 are formed to extend upward along the inner side surface of the side plate 4B and to extend downward along the outer side surface of the side plate 4B.

  As shown in FIG. 3, the load apex mark 22 displays the apex T of the load loaded on the loading unit 4 of the vessel 3, that is, the apex position of the crushed stone 100 in the front and rear direction of the vehicle body so as to display each side plate 4B. Extends leftward and rightward across the inner and outer surfaces and the surface of the bottom plate 4A. That is, the load apex mark 22 calculates a load shape close to an ideal shape as a design value in order to prevent the occurrence of spillage when the rated amount of crushed stone 100 is loaded on the vessel 3, and the load shape at this time is used as a base. The position of the apex T of the crushed stone 100 is displayed as the apex position in the front and rear directions.

  The operator who loads the crushed stone 100 on the vessel 3 performs the loading operation so as to drop the crushed stone 100 from, for example, a position above the Z1-Z1 line with reference to the load vertex mark 22, as shown in FIG. It is possible to realize a load shape (a load shape close to the ideal shape in order to prevent the occurrence of spillage).

  Reference numeral 23 denotes left and right center position marks which form part of the mark line 21. The left and right center position marks 23 are formed on the bottom plate 4A, the front plate 4C and the flange portion 5 of the stacking portion 4 as shown in FIG. By applying the coating material linearly over the top plate 5A, it is formed as a dotted line mark extending in the front and rear directions. The left and right center position mark 23 displays the position of the center of the vessel 3 in the left and right directions.

  That is, the left and right center position marks 23 are composed of linear dotted marks perpendicular to the Z1 -Z1 line passing through the load vertex T in the front and rear directions, and the front surface side of the bottom plate 4A is front and rear. A bottom plate mark portion 23A extending, a front plate mark portion 23B extending linearly on the surface side of the front plate 4C continuously to the bottom plate mark portion 23A, and a surface of the top plate 5A continuous to the front plate mark portion 23B The top plate is composed of a top plate mark portion 23C extending linearly in the front and rear directions.

  Reference numeral 24 denotes a loading rear end mark that forms a part of the mark line 21. The loading rear end mark 24 is formed on the rear end side of the bottom plate 4A and the side plates 4B of the loading portion 4 of the vessel 3, as shown in FIG. By applying paint over the inner side surface and the outer side surface, it is formed as a dotted line mark extending in the left and right directions. The loading rear end mark 24 displays the load spill prevention position of the crushed stone 100 loaded on the vessel 3 as the front and rear loading rear end position.

  That is, the loading rear end mark 24 is composed of a linear dotted line mark that is located in front of the rear end of the bottom plate 4A by a predetermined dimension and extends leftward and rightward, and is loaded from the rear end of the bottom plate 4A. It is formed by applying a paint at a position most effective for preventing spillage. The extension portions 24A extending to the left and right sides of the loading rear end mark 24 extend upward along the inner surface of the side plate 4B and extend downward along the outer surface of the side plate 4B.

  25 is a load spill prevention mark provided on the rear end side of the bottom plate 4A, and the load spill prevention mark 25 is composed of a V-shaped arrow line formed by applying paint on the rear end side of the bottom plate 4A. It is formed in a shape in which the tip of the arrow is in contact with the intersection of the left and right center position mark 23 and the loading rear end mark 24. The load spill prevention mark 25 urges the worker who loads the crushed stone 100 to perform the loading operation at a position on the front side of the loading end mark 24 on the surface of the bottom plate 4A in the direction indicated by the arrow. This is intended to prevent spillage on the rear end side of the bottom plate 4A.

  A top plate loading prevention mark 26 is provided on the top plate 5A of the collar portion 5 as a collar portion loading prevention mark. The top plate loading prevention mark 26 applies a paint on the top plate 5A of the collar portion 5. Is formed by an arrow line that expands in a V shape from the boundary position between the front plate mark portion 23B and the top plate mark portion 23C of the left and right center position mark 23. The top plate loading prevention mark 26 is formed on the top plate 5A as an arrow in contact with the boundary position between the front plate 4C of the stacking unit 4 and the top plate 5A of the collar unit 5. The top plate loading prevention mark 26 prevents the crushed stone 100 from falling or being loaded on the top plate 5A of the heel portion 5 so that the loading operation of the crushed stone 100 is performed on the loading portion 4 on the rear side of the top plate 5A. It is urged in the direction of the arrow to do it at the position.

  The dump truck 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described next.

  In a quarry such as a mine, a crushed stone 100 to be transported is loaded on the vessel 3 of the dump truck 1 using a large hydraulic excavator 13, for example. After the loading operation is completed, the operator who has entered the cab 8 operates the dump truck 1 to transport the crushed stone 100 loaded to the vessel 3 toward the unloading site.

  In this case, since the load of the crushed stone 100 on the vessel 3 can be confirmed by a weight monitor (not shown) provided in the cab 8 of the dump truck 1, the load is less than the rated amount, It can be prevented from becoming excessive. However, the load balance of the crushed stone 100 loaded in the loading unit 4 is actually left to the visual confirmation work as will be described later, and greatly depends on the skill and skill of the loader.

  That is, as shown in FIG. 1, the loading operation in the quarry is performed by the operator of the hydraulic excavator 13 operating the working device 16 so that the crushed stone 100 is loaded on the loading portion 4 of the vessel 3 from the rear side of the dump truck 1. There may be a loading operation. Moreover, as shown in FIG. 2, the crushed stone 100 may be loaded into the loading part 4 of the vessel 3 from the side of the dump truck 1.

  By the way, as shown in FIG. 1, when loading work from the rear side of the vessel 3, the operator of the hydraulic excavator 13 works while paying attention to the loading portion 4 of the vessel 3 from inside the cab 19 located at a high place. The boom 16A, arm 16B, and bucket 16C of the device 16 are moved to load the crushed stone 100. At this time, the operator of the hydraulic excavator 13 can confirm the load balance of the crushed stone 100 in the load portion 4 in the left and right directions because the load portion 4 of the vessel 3 is viewed obliquely downward from the rear. However, it is difficult to visually confirm the load balance in the front and rear directions, which may cause spillage.

  Further, as shown in FIG. 2, when the loading operation is performed from the side of the vessel 3, the operator of the excavator 13 sees the loading unit 4 of the vessel 3 obliquely downward from the side. The load balance of the crushed stone 100 can be confirmed in the forward and backward directions. However, it is difficult to visually confirm the load balance in the load unit 4 in the left and right directions of the vehicle, which may cause spillage.

  Therefore, in the first embodiment, the loading line 4 of the vessel 3 is provided with a mark line 21 serving as a reference for improving the loading balance when loading the crushed stone 100. This mark line 21 extends to the left and right over the inner and outer surfaces of each side plate 4B of the loading portion 4 of the vessel 3 and the surface of the bottom plate 4A. , Rear apex position) and the left and right directions with the crushed stone 100 loaded in the front and rear direction over the bottom plate 4A, the front plate 4C, and the top plate 5A of the flange 5 The left and right center position marks 23 for displaying the center position of the bottom plate 4A, and the rear end side of the bottom plate 4A extending leftward and rightward, and a loading rear end mark 24 for displaying the position where the crushed stone 100 is prevented from being spilled.

  Thus, the operator of the excavator 13 loads the crushed stone 100 by moving the boom 16A, the arm 16B, and the bucket 16C of the working device 16 while gazing at the loading portion 4 of the vessel 3 from within the cab 19 located at a high place. , The crushed stone 100 can be loaded using the bucket 16C with reference to the mark line 21 provided on the loading portion 4 of the vessel 3, so that the load balance of the crushed stone 100 in the loading portion 4 is improved. It is possible to suppress spillage during transportation of the crushed stone 100.

  For example, as shown in FIG. 1, when the loading operation is performed from the rear side of the vessel 3, the operator of the excavator 13 loads the loading vertex mark 22 provided on the loading portion 4 of the vessel 3 and the left and right center position marks 23. , The loading operation can be performed so that the crushed stone 100 is dropped from above the Z1-Z1 line (that is, the position of the point where the two marks 22, 23 intersect) shown in FIGS. In order to prevent the occurrence of spillage, a load shape close to the ideal shape can be realized. Then, the load balance of the crushed stone 100 in the loading section 4 can be confirmed in the front, rear direction, left and right directions, and the crushed stone to be transported on the basis of the load vertex mark 22 and the left and right center position mark 23. 100 can be loaded on the loading unit 4.

  In this case, the load apex mark 22 is located on the bottom plate 4A of the stacking unit 4 at the position of the apex in the front and rear directions when the rated amount of crushed stone 100 is loaded on the vessel 3 and crossing the Z1-Z1 line. The operator of the excavator 13 can perform the loading operation with reference to the position of the apex T of the crushed stone 100 as a reference. Further, the extension portion 22A of the load apex mark 22 is formed to extend upward along the inner side surface of the side plate 4B and to extend downward along the outer side surface of the side plate 4B. For this reason, even when the cargo vertex mark 22 on the bottom plate 4A is covered with the crushed stone 100, the position of the vertex T can be confirmed by looking at the extended portion 22A.

  Further, the left and right center position marks 23 are mark lines extending in the front and rear directions over the bottom plate 4A, the front plate 4C, and the top plate 5A of the eaves portion 5, and the bottom plate mark portion 23A is a crushed stone. Even when covered with 100, the position of the apex T of the crushed stone 100 can be easily confirmed by looking at the front plate mark portion 23B and the top plate mark portion 23C.

  On the other hand, as shown in FIG. 2, even when the loading operation is performed from the side of the vessel 3, the operator of the hydraulic excavator 13 loads the load vertex mark 22 provided on the loading portion 4 of the vessel 3 and the left and right center position marks 23. , The load balance of the crushed stone 100 in the loading section 4 can be confirmed in the front, rear direction, left, and right direction, and these load vertex mark 22 and left and right center position marks 23 As a reference, the crushed stone 100 to be transported can be loaded on the loading unit 4.

  In this case, the left and right center position marks 23 indicate the center positions in the left and right directions when the crushed stone 100 to be transported is loaded on the vessel 3, and the bottom plate 4 </ b> A, front plate 4 </ b> C, and collar 5 of the loading unit 4. Can be displayed as a mark line extending forward and backward over the top plate 5A, and the operator of the excavator 13 can perform the loading operation with reference to the position of the apex T of the crushed stone 100. When loading from the side of the vessel 3, the apex of the crushed stone 100 loaded on the loading unit 4 is obtained by looking at the extended portion 22A of the load apex mark 22 formed on the outer surface of the side plate 4B. The position of T can be easily confirmed.

  Also, a spill prevention position for preventing the crushed stone 100 to be transported from falling from the rear end side of the bottom plate 4A by the loading rear end mark 24 which is a mark line extending left and right on the rear end side of the bottom plate 4A. Can be displayed. For this reason, the operator of the hydraulic excavator 13 can prevent spillage from the rear end side of the bottom plate 4A by loading the crushed stone 100 on the loading portion 4 with the loading rear end mark 24 as a guide. Furthermore, the operator who performs the loading operation of the crushed stone 100 visually confirms that the loading operation is performed at a position on the front side of the loading rear end mark 24 on the surface of the bottom plate 4A according to the direction of the arrow indicated by the spill prevention mark 25. This can also prevent spillage on the rear end side of the bottom plate 4A.

  Further, a top plate loading prevention mark 26 made of a V-shaped arrow is provided on the top plate 5A of the collar portion 5. The operator of the hydraulic excavator 13 loads the crushed stone 100 on the loading unit 4 along the direction of the arrow indicated by the top plate loading prevention mark 26, so that the crushed stone 100 is dropped or loaded on the top plate 5 </ b> A of the collar unit 5. The top plate loading prevention mark 26 can prompt the operator to load the crushed stone 100 at the position of the stacking portion 4 on the rear side of the top plate 5A.

  Therefore, according to the first embodiment, the mark line 21 serving as a reference when the crushed stone 100 is loaded on the loading portion 4 of the vessel 3 includes the loading vertex mark 22, the left and right center position marks 23, the loading rear end. The mark 24, the spill prevention mark 25, and the top plate loading prevention mark 26 can be configured, and the crushed stone 100 to be transported can be loaded on the loading unit 4 in a well-balanced manner using these marks 22 to 26 as a guide. Thereby, the load balance of the load in the load portion 4 of the vessel 3 can be improved and the occurrence of spillage can be prevented.

  Moreover, for example, as shown in FIGS. 3 and 4, the load shape of the crushed stone 100 loaded on the loading portion 4 can be a well-balanced load shape inclined downward from the apex T, and the spillage during transportation Can be suppressed. Further, by improving the load balance, an uneven load is not applied to the vessel 3, the frame of the vehicle body 2, and the wheels (front wheel 9 and rear wheel 10), and durability and life can be extended.

  The mark line 21 employed in the first embodiment is composed of the load apex mark 22, the left and right center position marks 23, the loading end mark 24, the load spill prevention mark 25, and the top plate loading prevention mark 26. There is no need to configure. For example, two or more of these marks 22 to 26 including the load apex mark 22 and the loading rear end mark 24, or a combination of three or more marks including these marks 22 and 24 may be used. It ’s good.

  Next, FIG. 6 and FIG. 7 show a second embodiment of the present invention. In the second embodiment, the same reference numerals are given to the same components as those in the first embodiment described above, The description will be omitted.

  However, the feature of the present embodiment is that a mark line 31 serving as a reference for loading the crushed stone 100 on the loading portion 4 of the vessel 3 includes a loading vertex mark 22, a left and right center position mark 23, and a loading rear end mark. 24, in addition to the load spill prevention mark 25 and the top plate loading prevention mark 26, the front and rear center-of-gravity position marks 32 are included. Here, the load apex mark 22, the left and right center position marks 23, the loading rear end mark 24, the load spill prevention mark 25, and the top plate loading prevention mark 26 have the same configurations as those described in the first embodiment. It's okay.

  However, the front and rear center-of-gravity position marks 32 indicate the front and rear center-of-gravity positions when the rated amount of crushed stone 100 is loaded on the vessel 3 in accordance with the load vertex mark 22. That is, the front and rear center-of-gravity position marks 32 are orthogonally crossed in the left and right directions with respect to the ZZ line passing through the entire center of gravity G of the vessel 3 and the crushed stone 100 with the rated amount of crushed stone 100 loaded. It consists of a straight dotted mark, and is formed by applying paint to the surface of the bottom plate 4A.

  The front and rear center-of-gravity position marks 32 are dotted lines extending in the left and right directions by applying paint linearly across the inner surface and outer surface of each side plate 4B and the surface of the bottom plate 4A in the stacking portion 4 of the vessel 3. It is formed as a mark. The extension portions 32A extending to the left and right sides of the front and rear center-of-gravity position marks 32 are formed to extend upward along the inner side surface of the side plate 4B and to extend downward along the outer side surface of the side plate 4B.

  Thus, according to the second embodiment configured as described above, the mark line 31 on which the crushed stone 100 is loaded includes the load vertex mark 22, the left and right center position mark 23, the loading rear end mark 24, It can be constituted by the load spill prevention mark 25, the top plate loading prevention mark 26, and the front and rear center of gravity position marks 32, and the same effect as in the first embodiment can be obtained.

  In particular, in the second embodiment, a rated amount of crushed stone is applied to the loading portion 4 by the front and rear center-of-gravity position marks 32 extending leftward and rightward over the inner and outer surfaces of each side plate 4B and the surface of the bottom plate 4A. The total center of gravity G of the vessel 3 and the crushed stone 100 in a state where 100 is loaded can be displayed as the center of gravity position in the front and rear direction of the vehicle body. Further, the crushed stone 100 can be loaded on the loading unit 4 in a well-balanced manner using the left and right center position marks 23 as a guide.

  Thereby, for example, as shown in FIGS. 6 and 7, the load shape of the crushed stone 100 loaded on the loading unit 4 can be a well-balanced load shape that is inclined downward from the apex T, and is in the middle of transportation. Occurrence of spillage can be suppressed. In particular, by providing the front and rear center-of-gravity position marks 32 additionally, even if the load vertex T deviates from the position of the load vertex mark 22, the vertex is positioned at the front side of the front and rear center-of-gravity position marks 32. By confirming that T is present, the load balance of the crushed stone 100 can be within an allowable range in the front and rear directions, and the load balance as a whole can be improved. As a result, an uneven load is not applied to the vessel 3, the frame of the vehicle body 2, and the wheels (front wheel 9 and rear wheel 10), and durability and life can be extended.

  Note that the mark line 31 employed in the second embodiment also includes the load apex mark 22, the left and right center position marks 23, the loading end mark 24, the load spill prevention mark 25, the top plate loading prevention mark 26, and the front , The rear center-of-gravity position mark 32 does not have to be configured. That is, two marks (loading vertex mark 22 and loading rear end mark 24) or three or more marks may be used in combination with the front and rear center of gravity position mark 32.

  In the second embodiment, an example in which the extension portions 32A extending to the left and right sides of the front and rear center-of-gravity position marks 32 are formed on both the inner side surface and the outer side surface of each side plate 4B is taken as an example. I gave it as an explanation. However, the present invention is not limited to this. For example, an extension of the front and rear center-of-gravity position marks may be formed on one of the inner side surface and the outer side surface of each side plate 4B, and not formed on the other side.

  Further, in the first embodiment, an example in which the extended portions 22A extending on both the left and right sides of the cargo vertex mark 22 are formed on both the inner side surface and the outer side surface of each side plate 4B will be described. did. However, the present invention is not limited to this. For example, an extension portion of the load apex position mark may be formed on one of the inner surface and the outer surface of each side plate 4B and not formed on the other.

  On the other hand, in the first embodiment, the load vertex mark 22, the left and right center position marks 23, the loading rear end mark 24, the load spill prevention mark 25, and the top plate loading prevention mark 26 constituting the mark line 21 are provided. Each case of displaying with dotted lines has been described as an example. However, the present invention is not limited to this, and the marks 22 to 26 may be displayed using, for example, a solid line, a one-dot chain line, or a two-dot chain line.

  These marks 22 to 26 may be displayed in different colors and tones so that an operator who loads the crushed stone 100 can easily identify the marks 22 to 26. This point can be similarly changed for the front and rear center-of-gravity position marks 32 employed in the second embodiment.

  Furthermore, in each said embodiment, the rear-wheel drive type dump truck 1 was mentioned as an example and demonstrated as a transport vehicle. However, the present invention is not limited to this. For example, the present invention may be applied to a front-wheel drive type or a four-wheel drive type dump truck that drives both front and rear wheels, and may be applied to a transport vehicle other than the dump truck. It ’s good.

1 Dump truck (transportation vehicle)
2 Body 3 Vessel
4 Loading portion 4A Bottom plate 4B Side plate 4C Front plate 5 Grow portion 6 Elastic pad 7 Connecting pin 8 Cab 9 Front wheel 10 Rear wheel 11 Engine 12 Hoist cylinder 13 Hydraulic excavator 21, 31 Mark line 22 Load vertex mark 23 Left and right center position mark 24 Loading end mark 25 Load spill prevention mark 26 Top plate loading prevention mark (Saddle loading prevention mark)
32 Front and rear center of gravity position mark 100 Crushed stone (cargo to be transported)
G Center of gravity T Vertex

Claims (5)

A self-propelled vehicle body, a cargo bed that is tiltably provided on the vehicle body and on which a load to be transported is loaded, and a cab that is provided in the vehicle body and that is located on the front side of the cargo bed and defines a driver's cab inside And a hoist cylinder provided between the vehicle body and the loading platform so as to be extendable and contracted and extending obliquely when the cargo is discharged from the loading platform,
The loading platform has a loading portion formed as a container for loading the load, and a flange provided on the upper front side of the loading portion and covering the cab from above, and the loading portion includes the loading portion. A transport vehicle comprising a bottom plate that forms a bottom surface of the base plate, and left and right side plates that are erected upward from both left and right side ends of the bottom plate,
The loading platform is provided with a mark line serving as a reference in improving the loading balance when loading the luggage,
The mark line is
The left and right side plates extend in the left and right directions over the inner and / or outer side surfaces of the left and right surfaces, and the apex in the front and rear directions of the load when the load is loaded on the loading portion. Loading vertex mark to display the position,
A transporting vehicle comprising a loading rear end mark that is positioned on the rear end side of the bottom plate and extends left and right and displays a load prevention position of the load.   The mark line extends in the left and right directions over the inner side surface and / or outer side surface of the left and right side plates and the surface of the bottom plate, and the load is loaded on the loading portion in accordance with the load vertex mark. The transport vehicle according to claim 1, comprising a rear center of gravity position mark before displaying the center of gravity position in the front and rear directions.   2. The mark line includes left and right center position marks that extend forward and rearward over the bottom plate, front plate, and collar, and display left and right center positions of the cargo bed. Or the transport vehicle of 2.   The mark line is formed on the rear end side of the bottom plate as an arrow in contact with the loading rear end mark, and includes a load spill prevention mark that prevents the load from spilling from the rear end side of the bottom plate. The transport vehicle according to claim 1, 2 or 3.   The mark line includes an eaves loading prevention mark formed on the eaves as an arrow in contact with a boundary position between the loading unit and the eaves and preventing the load from being loaded on the eaves. The transport vehicle according to claim 1, 2, 3, or 4.

Images