JP2015199368A - trolley type dump truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trolley type dump truck which shortens time for ordinary maintenance inspection of a pantograph and which secures an operator's field of view within a cab.SOLUTION: A trolley type dump truck 10 includes: a vessel 6 that has a front part provided with a canopy 11 and that has a rear part provided with a body part 13; a vehicle body 30 that has a cab 3 and decks 70 and 72, provided below the canopy; and a pantograph device 20 that is arranged in an upper part of the vehicle body and used for electric power supply from a trolley wire 200. The canopy is provided with inspection means 101 and 102 for inspecting a pantograph.

Description

  The present invention relates to a dump truck used in a mine or the like, and more particularly to a trolley type dump truck provided with a pantograph.

  Trolley-type dump trucks that use the pantograph mounted on the upper part of the vehicle body to capture the electric power flowing in the overhead lines installed on the uphill road are used in mines and mining sites. As shown in Non-Patent Document 1, in the trolley type dump truck, the AC motor is driven by the captured electric power, so that it is possible to keep the engine in an idling state when supplying electric power. Also, on earthmoving sites where loading lines are not installed, loading work sites, downhills, etc., the trolley box is used to switch between the trolley mode and the diesel mode, and the vehicle runs on the power generated by the engine. Therefore, the fuel consumption can be reduced to about ½, high speed operation up to about twice the traveling speed of a normal dump truck can be performed, and the travel time can be shortened.

  On the other hand, Patent Document 1 describes an example of pantograph state monitoring used for trains and the like. The state monitoring device described in this publication performs image processing on image data obtained by imaging by a camera, thereby recognizing that a train pantograph has been imaged, a monitor for displaying a pantograph image, Storing means for storing only the image data of the pantograph recognized to be captured.

JP-A-8-228338

Uno et al., “Transition of Mining Machinery and Future Development in Electrification”, Hitachi Review, May 2012, Vol. 94, No. 5, pp. 22-24

  As described in Non-Patent Document 1, the total length of a trolley-type dump truck used at a mine or mining site is 13 m or more, and the total height reaches about 7 m. In order to mount the pantograph, a pantograph support with a height of 2.2 m is built using a deck formed at a position about 5 m above the ground as a foundation. The pantograph is attached to the upper end of the pantograph support so as to be stretchable. In other words, pantographs are provided at locations where the pantographs are not directly accessible to workers who have entered the deck for the purpose of boarding the cab, etc., making daily inspection of pantographs from the deck difficult. It has become.

  Incidentally, since dump trucks used in mines and the like operate for almost 24 hours, wear of pantograph sliding plates is severe, and it is necessary to grasp the state of the sliding plates about once a week. For this daily inspection, conventionally, an aerial work platform was prepared and placed on the side of the dump truck, or a separate maintenance inspection scaffold was provided on the pantograph support.

  When an aerial work vehicle is always prepared, the standby time is longer than the inspection time using the aerial work vehicle, and the aerial work vehicle cannot be used effectively. In addition, a space for placing the aerial work vehicle around the dump truck is required. When a separate scaffold is provided for pantograph maintenance and inspection, the weight of the dump truck increases, so it is necessary to increase the structural strength, and the weight of the vehicle body increases. This also deteriorates the transportation capacity.

  In the pantograph for trains described in Patent Document 1 above, daily inspection is possible at a dedicated maintenance terminal, so access to the pantograph during inspection work is done in a wide field such as a dump truck, and a dedicated maintenance terminal is installed. It is not limited compared to what it does not have. Therefore, there is no need to take into consideration access restrictions during inspection work and deterioration of visibility due to the addition of inspection work equipment.

  The present invention has been made in view of the above-mentioned problems of the prior art. The purpose of the present invention is to reduce the daily maintenance and inspection time of a pantograph in a trolley type dump truck, and to reduce the visibility of workers in a cab. It is to secure up to about a dump truck that does not have. Another object of the present invention is to secure the transport capability of the trolley type dump truck in addition to the above object.

  A feature of the present invention that achieves the above object is that a vessel having a canopy at the front and a main body at the rear, a vehicle main body having a cab and a deck provided below the canopy, and a trolley disposed above the vehicle main body. In a trolley type dump truck provided with a pantograph device used for power supply from a line, an inspection means for inspecting the pantograph device is provided in the canopy.

  And in this feature, the inspection means is provided on the front end side of the canopy and at least one side surface of the canopy, and on the at least one side surface side of the canopy provided with the safety fence, It is preferable to have a ladder that allows an operator to move up and down from the deck to the canopy or vice versa. Furthermore, the deck may include a cab deck for boarding the cab, and an auxiliary deck provided in a foldable manner on the cab deck.

  In the above feature, the inspection means may include a rail provided on the front side of the canopy, and a camera device that engages with the rail and is movable in the longitudinal direction of the rail. .

  According to the present invention, in the trolley type dump truck, since the pantograph can be inspected from the buttocks (canopy) of the vessel of the dump truck, the daily maintenance inspection time of the pantograph can be shortened, and the operator in the cab can be reduced. The field of view can be secured up to a dump truck having no pantograph. In addition, since the weight increase due to the equipment for maintenance and inspection is slight, the transportation capacity of the trolley type dump truck is hardly affected, and the transportation capacity is ensured.

1 is a perspective view of an embodiment of a trolley type dump truck according to the present invention. It is a front view of the trolley type dump truck shown in FIG. It is a side view of the trolley type dump truck shown in FIG. It is a side view of the trolley type dump truck provided with other examples of maintenance inspection means. It is a perspective view of one Example of the ladder for boarding a canopy.

  Hereinafter, an embodiment of a trolley type dump truck according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a trolley type dump truck 10 according to an embodiment of the present invention, and FIG. 2 is a front view of the trolley type dump truck 10 shown in FIG. The trolley type dump truck 10 has a vehicle body 30 and a vessel 6 connected to the upper portion of the vehicle body 30 by a hinge pin 4 (see FIG. 3) and controlled to be raised and lowered by a hoist cylinder 5 (see FIG. 3). ing.

  The vessel 6 can load a large amount of heavy loads such as crushed stones, minerals such as coal, earth and sand, etc. in the mine, and the upper surface is almost horizontal when lying down. And the main-body part 13 which forms a loading container in V shape, the collar part (canopy) 11 which continues to the main-body part 13, and is located in the front side of the main-body part 13, and the stop provided so that it may stand in the canopy 11 Part 12. The canopy 11 is formed so as to cover the upper side of the cab 3 described later, and protects the cab 3 and the deck 70 from the load when the load is loaded on the main body 13 with a hydraulic excavator or the like. The stopper 12 prevents the load from scattering forward when the load is loaded.

  The vehicle body 30 includes a main frame 2 having a sturdy frame structure, and a front wheel 7 and a rear wheel 8 each attached to a lower side surface of the main frame 2. A cab 3 on which an operator gets on the front side of the vehicle body 30 and on the right side in FIG. 1 is provided. In order for an operator to board the cab 3, decks 70 and 72 are provided around the cab 3 and on the front side of the vehicle body 30.

In order to board the deck 70, ladders 51 and 54 are disposed substantially vertically on the left and right sides of the front side of the vehicle body 30 where a drive source such as an AC motor is disposed. One ladder 51 is continuous with stairs 52 that can be moved up and down in the left-right direction. A handrail 53 is provided on the stairs 52. The other ladder 54 is connected to a ladder 55 arranged substantially vertically, and is a front end of a deck 70. A handrail 58 is provided at the center in the left-right direction, a handrail 57 is provided on the cab 3 side, and an anti-cab side is provided. Each is provided with a handrail 59. A mirror (convex mirror) 41 is attached to the handrail 57 and the handrail 59 for the operator's rear view and side view.

  As described above, the trolley type dump truck 10 according to the present invention is for current collection above the vehicle main body 30 and in front of the cab 3 so that power can be supplied from the trolley wire 200 on a slope or the like. The pantograph device 20 is provided. In the pantograph device 20, a sliding plate 21 that slides on the trolley wire 200, an upper arm 23 and a lower arm 25 that are provided at a lower portion of the sliding plate 21 and can be folded at a connection portion, and a base portion 26 that fixes the lower arm 25. Are integrally formed as a pair of left and right sides, and the upper left and right sliding plates 21 and 21 are connected by a connecting member 22.

  By connecting the pair of left and right members with the sliding plate 21 in this manner, the dump truck 10 is detached from the traveling path under the trolley line 200 due to the unevenness of the guide surface, and the sliding plate 21 is moved to the trolley during power feeding. When returning from the line 200 and then returning to the normal travel path, either the pantograph device 20 or the trolley line 200 is prevented from being damaged. That is, it is possible to prevent a problem that the sliding plate 21 is displaced from the trolley line 200, which does not occur in the case of a vehicle running on a track such as a train, by connecting the left and right sliding plates 21.

  Since the pantograph device 20 is disposed above the front portion of the vehicle body 30, a support portion that supports the pantograph device 20 at the lower portion is formed at the front end portion of the deck 70. The support portion extends in the vertical direction and connects a pair of left and right support columns 62 and 65, and connects the upper ends of the support columns 62 and 65, and a flat base plate 61 that extends to the left and right sides of the support columns 62 and 65; In order to prevent warping of the base plate 61, the support columns 64 and 65 are connected to the left and right ends of the base plate 61, and the support member 64 disposed obliquely and similarly disposed obliquely between the support column 62 and the base plate 61 to support the base plate 61. And a slanting member 66. The base portion 26 of the pantograph device 20 is placed on the upper surface of the base plate 61.

  The support portion of the pantograph device 20 composed of the support columns 62 and 65, the base plate 61, the support member 64, and the oblique member 66 serves as a load of the dump truck 10, and therefore is as light as possible and can be used in the cab 3. It is required that the worker's field of vision be blocked as much as possible. On the other hand, the pantograph device 20 can support the reaction force of the load received from the trolley wire 200, and the support portion is not deformed even if an impact load generated by unevenness of the running surface is applied between the trolley wire 200 and the sliding plate 21. It is also required to have the following strength. In order to satisfy these conditions, the support part of the pantograph device 20 according to the present invention is not strong enough for an operator to safely ride on the base plate 61 and also includes means for riding on the base plate 61. Not.

  Therefore, in the present invention, in order to facilitate the periodic inspection of the pantograph device 20, an inspection means capable of daily inspection of the pantograph device 20 is provided on the canopy 11 having sufficient strength even if the operator rides on the pantograph device 20. ing. Details will be described with reference to FIGS. 3 and 4 are side views of the trolley-type dump truck 10 according to the present invention, FIG. 3 is a view for explaining a first embodiment of the inspection means, and FIG. 4 is a second embodiment of the inspection means. It is a figure explaining an example. FIG. 5 is a perspective view around the cab 3 for explaining the auxiliary deck 72a applicable to the first embodiment shown in FIG.

  First, the first embodiment will be described with reference to a side view of the dump truck 10 shown in FIG. 3 and a perspective view around the cab 3 shown in FIG. At the forefront of the dump truck 10, a ladder 51 and a staircase 52 for an operator to board the cab 3 are provided. A cab deck 72 is provided around the deck 70 and the cab 3 at the top of the stairs 52. As described above, the support portion of the pantograph device 20 is provided between the staircase 52 and the cab 3. On the upper surface of the base plate 61 constituting this support portion, the sliding plate 21 and the upper and lower arms 23, 25, A pantograph device 20 including a base portion 26 is mounted.

  A safety fence 102 is provided at the front of the canopy 11 so that an operator can safely work at a position where the sliding plate 21 can be seen in daily inspection of the wear state of the pantograph device 20, particularly the sliding plate 21. Since the front portion of the canopy 11 is not originally a place for loading a load to be loaded on the vessel 6, the hoist cylinder 5 is retracted toward the support shaft 5a and the vessel 6 is rotated around the hinge pin 4 to be in a lying state. Then it becomes almost horizontal. Therefore, even if the worker rides on the canopy 11 with the vessel 6 lying down, a stable state can be obtained. Further, in order to check the sliding plate 21 extending to the left and right, the worker moves on the canopy 11 and then moves in a direction perpendicular to the paper surface. However, since safety fences 102 are provided on the front end side and the left and right sides, Safety is ensured.

  Here, the safety fence 102 is formed of a steel pipe or the like, and includes a front-side hand rail 103 and a side-side hand rail. One side of the safety fence 102 can be formed with an open portion by the chain 104 so that an inspection operator can get on the canopy 11. One end of the chain 104 is fixed to the handrail 103, and the other end is removably locked to the support member 105 of the safety fence 102.

  Corresponding to the position in the front-rear direction where the chain 104 is provided, a ladder 101 that reaches the canopy from the deck 72 is provided. FIG. 5 is a perspective view showing an example of attachment of the ladder 101. The ladder 101 is fixed to the upper surface of the cab 3 by a ladder support member 121.

  The canopy 11 that covers the cab 3 and the deck 72 around the cab is provided so that the load does not hit the operator or various mounted devices when the load is loaded. It is wider than the width of the deck 72. Therefore, in order to position the ladder 101 reaching the canopy 11 substantially vertically, an auxiliary deck 72a only for inspection work is provided. The auxiliary deck 72a extends in the left-right direction with respect to the width of the canopy 11, and a handrail 57c is provided around the periphery to ensure safety.

  Further, a handrail 57 is conventionally provided on the deck 72 around the cab 3, but a chain 57 b is provided instead of the pipe handrail 57 at a portion corresponding to the ladder 101. One end of the chain 57b is fixed to the handrail 57, and the other side is detachably locked to the support member 57a. Therefore, when the worker gets on the cab 3 using the ladder 101, the chain 57b is unlocked so that the worker can go to the auxiliary deck 72a. On the other hand, at times other than inspection work, the chain is locked to the support member 57a in order to ensure safety.

  The auxiliary deck 72a needs to extend to the outside of the left and right width of the canopy 11, but there is a possibility that the auxiliary deck 72a becomes an obstacle when the dump truck 10 travels or is loaded. Therefore, the auxiliary deck is made foldable. Specifically, for example, the auxiliary deck 7 is folded 90 degrees downward at a position where the handrail 57 is provided. Alternatively, the ladder 101 is folded upward. Thereby, the malfunction during driving | running | working or mounting work can be eliminated. In addition, since the ladder 101 is arranged away from the cab 3 in the left-right direction up to the width position of the canopy 11, it is possible to reduce as much as possible that the worker's field of view in the cab 3 is narrowed by the ladder 101.

  According to the present embodiment, the daily inspection of the pantograph device performed with a frequency of about once per round can be easily performed simply by providing a light and simple means. Moreover, although a ladder as an inspection means is provided on the side surface of the cab, since it is separated from the cab by a predetermined distance, it is possible to reduce the view of the worker in the cab as much as possible.

  Next, another embodiment of the inspection means of the pantograph device 20 will be described with reference to FIG. FIG. 4 is a side view of the dump truck 10. The arrangement of the pantograph device 20, the cab 3, and the stairs 52 is the same as that of the embodiment shown in FIG. This embodiment differs from the above embodiment in that a rail 113 extending in the left-right direction is provided on the front side of the front end of the canopy 11, and a camera support member 112 that engages with the rail is provided. A CCD camera or the like can be attached to the camera support member 112. By moving the camera support member 112 in the left-right direction, not only the state of the sliding plate 21 from the camera 111 but also the status of the entire pantograph device 20 can be inspected and recorded.

  In FIG. 4, the description of the ladder 101 and the safety fence 102 shown in FIG. 3 used when an operator works on the canopy 11 to move the camera support member 112 is omitted. ing. In addition, the camera support member is shown integrally with a rail engaging portion that engages with the rail 103 and a column portion that is connected to the rail engaging portion and extends in the vertical direction. Also good. In that case, if only the rail engaging portion is always engaged with the rail and the column portion and the camera are attached only at the time of inspection, there is no possibility of hindering the traveling and loading of the dump truck.

  In this embodiment, the daily inspection of the pantograph device, particularly the sliding plate, can be easily performed only by providing an inspection means having a simple and light structure. Moreover, there is no fear of narrowing the field of view of the workers in the cab.

  In the above embodiment, the ladder 101 is fixed to the cab. However, the fixing portion of the ladder is not limited to the cab, and may be fixed to the deck 72, for example. Further, if the auxiliary deck handrail 57c is also configured to be foldable, there is nothing that protrudes from the vehicle body width during traveling, and traveling of the dump truck is facilitated.

2 ... main frame, 3 ... cab, 4 ... hinge pin, 5 ... hoist cylinder, 5a ... support shaft, 6 ... vessel, 7 ... front wheel, 8 ... rear wheel, 10 ... (trolley type) dump truck, 11 ... buttocks ( Canopy), 12 ... Stopping part, 13 ... Main body part, 20 ... Pantograph device, 21 ... Sliding plate, 22 ... Connection member, 23 ... Upper arm, 25 ... Lower arm, 26 ... Base part, 30 ... Vehicle body, 41 ... Mirror (convex mirror), 51 ... ladder, 52 ... stairs (step), 53 ... handrail, 54, 55 ... ladder, 57 ... handrail, 57a ... post member, 57b ... chain, 57c ... handrail member, 58, 59 ... Handrail, 60 ... pantograph support, 61 ... base plate, 62 ... support, 64 ... support member, 65 ... support, 66 ... diagonal member, 70 ... deck, 72 ... (for cab) deck, 72a ... auxiliary deck, 1 DESCRIPTION OF SYMBOLS 01 ... Ladder, 102 ... Safety fence, 103 ... Hand rail, 104 ... Chain, 105 ... Strut member, 111 ... Camera, 112 ... (for camera) Support member, 113 ... Rail, 121 ... Ladder support member, 200 ... Trolley line.

Claims (4)

A vessel having a canopy at the front and a main body at the rear, a vehicle main body having a cab and a deck provided below the canopy, and a pantograph device disposed at the top of the vehicle main body and used for power feeding from a trolley wire In the trolley type dump truck
A trolley-type dump truck characterized in that an inspection means for inspecting the pantograph device is provided in the canopy.   The inspection means is provided on a safety fence provided on the front end side and at least one side surface of the canopy, and provided on at least one side surface of the canopy provided with the safety fence. On the contrary, the trolley type dump truck according to claim 1, further comprising a ladder that allows an operator to move up and down.   The trolley type dump truck according to claim 2, wherein the deck includes a cab deck for boarding the cab, and an auxiliary deck that is foldable on the cab deck.   The said inspection means has the rail provided in the front side of the said canopy, and the camera apparatus which was engaged with this rail and was provided so that the movement to the longitudinal direction of the said rail was possible. Trolley type dump truck.

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