JP2018087059A - Work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work vehicle that enables a person other than an operator to view a video photographed by a camera and use it for various purposes.SOLUTION: A crane 1 being a work vehicle is provided with: a telescopic boom 22; a traveling vehicle 10 that movably supports the telescopic boom 22; a camera 31 that photographs the surroundings of the telescopic boom 22 and the traveling vehicle 10; and a monitor 41 that displays a video photographed by the camera 31. The monitor 41 is attached to a top boom member 22f which is a tip part of the telescopic boom 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to work vehicle technology, and more particularly, to a work vehicle such as a crane or an aerial work vehicle equipped with an external display device.

  Conventionally, as shown in Patent Document 1, a crane vehicle including a suspended load monitoring camera is known. In the crane vehicle disclosed in Patent Document 1, a suspended load monitoring camera is installed at the tip (boom top member) of the telescopic boom. And in the crane vehicle currently disclosed by patent document 1, it is set as the structure which the operator confirms the image | video of the hanging load image | photographed with the hanging load monitoring camera with the monitor arrange | positioned in the driver's seat.

JP 7-48088 A

  In the crane vehicle equipped with the conventional suspended load monitoring camera disclosed in Patent Document 1, only the operator in the driver's seat can see the image. For this reason, the crane vehicle provided with the conventional suspended load monitoring camera has been difficult to use for applications other than monitoring the suspended load.

  The present invention has been made in view of such current problems, and provides a work vehicle that allows a person other than an operator to visually recognize an image captured by a camera and can be used for various purposes. The purpose is to do.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, the work vehicle according to the present invention projects a telescopic boom, a traveling vehicle that movably supports the boom, a camera that captures the boom and the surroundings of the traveling vehicle, and an image captured by the camera. And a monitor attached to a tip portion of the boom or a member attached to the tip portion.
In the work vehicle having such a configuration, it is possible to make it possible for a person other than the operator to visually recognize the image taken by the camera, and thus the work vehicle can be used for various purposes.

In the work vehicle according to the present invention, the monitor may be attached to the tip of the boom or a member attached to the tip via a support device that supports the angle of the monitor so that the angle of the monitor can be changed. Features.
In the work vehicle having such a configuration, the monitor can be directed to a person who can be surely seen regardless of the length of the boom, the tilt angle, and the like, thereby further expanding the uses of the work vehicle.

The work vehicle according to the present invention is a crane, further comprising a winch, a wire rope fed out from the winch, and a hook block supported by the wire rope, and the camera is attached to the hook block It is characterized by that.
According to such a configuration, the camera can be brought closer to the photographing object. As a result, it is possible to expand the shootable range and to capture a finer image, and to expand the application of the crane.

The work vehicle according to the present invention is an aerial work vehicle, further comprising a bucket attached to a tip portion of the boom, wherein the camera is attached to the bucket.
According to such a structure, the use of an aerial work vehicle can be expanded.

  As effects of the present invention, the following effects can be obtained.

  According to the work vehicle according to the present invention, a person other than the operator can visually recognize the video photographed by the camera. Thereby, it becomes possible to use a work vehicle for various uses.

The figure which shows the whole structure of the work vehicle (crane) which concerns on one Embodiment of this invention. The schematic diagram which shows an external display apparatus. The schematic diagram which shows the modification of an external display apparatus. The schematic diagram which shows the usage example of the crane which concerns on one Embodiment of this invention. The figure which shows the whole structure of the work vehicle (aerial work vehicle) which concerns on one Embodiment of this invention. The schematic diagram which shows the usage example of the aerial work vehicle which concerns on one Embodiment of this invention.

Next, embodiments of the invention will be described.
First, the whole structure of the crane which is a work vehicle which concerns on one Embodiment of this invention is demonstrated using FIG.

  As shown in FIG. 1, the crane 1 is a mobile crane that can move to any desired location, and includes a traveling vehicle 10 and a crane device 20.

The traveling vehicle 10 conveys the crane apparatus 20, has a plurality (four in this embodiment) of wheels 11, 11, 11, and 11 and travels using an engine (not shown) as a power source.
Outriggers 12, 12, 12, and 12 are provided at four corners of the traveling vehicle 10. The outrigger 12 includes a protruding beam 12a that can be extended by hydraulic pressure on both sides in the width direction of the traveling vehicle 10 and a hydraulic jack cylinder 12b that can extend in a direction perpendicular to the ground. Then, the traveling vehicle 10 can bring the crane 1 into a workable state by grounding the jack cylinder 12b, and the workable range (work) of the crane 1 by increasing the extension length of the overhanging beam 12a. (Radius) can be increased.

  The crane apparatus 20 lifts the conveyed product W with a wire rope. The swivel base 21, the telescopic boom 22, the main hook block 23, the sub hook block 24, the hoisting cylinder 25, the main winch 26, the main wire rope 27, and the sub winch. 28, a sub-wire rope 29, a cabin 30 and the like.

  The swivel base 21 is configured to allow the crane device 20 to turn, and is provided on the frame of the traveling vehicle 10 via an annular bearing. The annular bearing is disposed so that the center of rotation is perpendicular to the installation surface of the traveling vehicle 10. The swivel base 21 is configured to be rotatable in one direction and the other direction with the center of the annular bearing as the center of rotation. The swivel base 21 is rotated by a hydraulic swivel motor (not shown).

  The telescopic boom 22 supports the wire rope in a state in which the conveyed product W can be lifted, and includes a base boom member 22a, a second boom member 22b, a third boom member 22c, a force boom member 22d, and a fifth boom. It consists of a boom member 22e and a top boom member 22f. Each boom member is inserted in a nested manner in the order of the cross-sectional area. The telescopic boom 22 is configured to be telescopic in the axial direction by moving each boom member with an unillustrated telescopic cylinder. The telescopic boom 22 is provided on the swivel base 21 so that the base end of the base boom member 22a can swing. Thereby, the telescopic boom 22 is configured to be horizontally rotatable and swingable on the frame of the traveling vehicle 10.

The main hook block 23 is for hooking and suspending the conveyed product W, and a plurality of hook sheaves around which the main wire rope 27 is wound and a main hook F1 for suspending the conveyed product W are provided.
In addition to the main hook block 23, the crane device 20 further includes a sub hook block 24 for hooking and suspending the conveyed product W. The sub hook block 24 is provided with a sub hook F2 for suspending the conveyed product W. It has been.

  The hoisting cylinder 25 raises and lowers the telescopic boom 22 to maintain the posture of the telescopic boom 22, and is composed of a hydraulic cylinder composed of a cylinder part and a rod part.

The main winch 26 is used to feed (wind up) and feed (wind down) the main wire rope 27, and is constituted by a hydraulic winch in this embodiment.
In the main winch 26, a main drum around which a main wire rope 27 is wound is rotated by a main hydraulic motor. The main winch 26 feeds out the main wire rope 27 wound around the main drum by supplying hydraulic oil so that the main hydraulic motor rotates in one direction, and the main hydraulic motor rotates in the other direction. In this way, the main oil rope 27 is wound around the main drum and fed.

  The sub winch 28 is used for feeding and unloading the sub wire rope 29, and in this embodiment, is constituted by a hydraulic winch.

  The cabin 30 covers the cockpit and is provided on the side of the telescopic boom 22 in the swivel base 21. In the cockpit, a main operation valve for operating the main winch 26, a sub operation tool for operating the sub winch 28, a hoisting operation tool for operating the telescopic boom 22, and the traveling vehicle 10 (the crane 1 ) And the like are provided.

  The crane 1 configured as described above can move the crane device 20 to an arbitrary position by traveling the traveling vehicle 10, and the hoisting cylinder 25 is used to stand the telescopic boom 22 at an arbitrary hoisting angle. Thus, the telescopic boom 22 can be extended to an arbitrary telescopic boom length.

The crane 1 has a camera 31 attached to the main hook block 23.
A power line and a signal line (not shown) are connected to the camera 31 so that an image captured by the camera 31 can be output to the outside. In the present embodiment, the configuration in which the camera 31 is attached to the main hook block 23 is illustrated, but the camera 31 may be attached to the sub hook block 24. The crane 1 may be configured to transmit and receive a video signal output from the camera 31 by wireless means.

The camera 31 operates the crane device 20 and can adjust the main hook block 23 so that the main hook block 23 is positioned almost immediately above the object to be imaged.
In the crane 1, a mechanism for adjusting the angle (angle adjustment mechanism) is arranged between the camera 31 and the main hook block 23, and the camera 31 can take a picture other than directly below the main hook block 23. In this case, it is more preferable that the angle adjustment mechanism has a configuration that allows angle adjustment by remote operation.

  Further, the camera 31 extends the main wire rope 27 by the operation of the main winch 26 and lowers the main hook block 23 arranged almost immediately above the object to be photographed, so that the object to be photographed can be photographed more precisely. it can. When the camera 31 is enlarged and photographed by a telephoto function such as digital zoom, the image becomes rough. However, in the configuration in which the camera 31 is attached to the main hook block 23, the camera 31 is actually brought closer to the photographed object. Therefore, it is possible to shoot a finer video.

Here, the external display device provided in the crane 1 will be described.
As shown in FIGS. 1 and 2, the crane 1 includes an external display device 40 at the distal end portion (top boom member 22 f) of the telescopic boom 22.

The external display device 40 is a device for displaying an image captured by the camera 31, and includes a monitor 41, a support device 42, and the like.
The monitor 41 is a liquid crystal display and is configured to receive a video signal captured by the camera 31. As the monitor 41, various types of display devices such as a plasma display and an organic EL display can be adopted in addition to a liquid crystal display.

  As for the size of the monitor 41, various sizes can be selected according to the use of the external display device 40. However, when viewing from a distance is assumed, the monitor 41 can be attached to the top boom member 22f. It is preferable to use a screen having the largest possible screen size. Thereby, a person who is further away from the crane 1 can visually recognize the image captured by the camera 31 on the monitor 41. Note that the crane 1 may be configured such that the cabin 30 is provided with a monitor (not shown) similar to the conventional one and the image of the camera 31 can be visually recognized by the monitor in the cabin 30.

  The support device 42 is a device for attaching the monitor 41 to the distal end portion (top boom member 22f) of the telescopic boom 22, and includes a support base 43, a first member 44, a second member 45, a third member 46, and the like. It is constituted by.

  The support base 43 is a portion configured by a bracket-like member fixed to the top boom member 22 f and supports the first member 44.

The first member 44 includes a first holding member 44A and a first movable member 44B, and a shaft portion 44C formed on the first movable member 44B is pivotable in a hole 44D of the first holding member 44A. The structure is supported. In the first member 44, the first holding member 44 </ b> A is fixed to the support base 43.
With such a configuration, in the first member 44, the first movable member 44B can rotate around the axis X of the shaft portion 44C.

The second member 45 includes a second holding member 45A and a second movable member 45B, and a shaft portion 45C formed on the second movable member 45B is pivotable in a hole 45D of the second holding member 45A. The structure is supported. In the second member 45, the second holding member 45A is fixed to the first movable member 44B.
With such a configuration, in the second member 45, the second movable member 45B can rotate about the axis Y of the shaft portion 45C.

  The third member 46 is rotatably supported with respect to the shaft-like second movable member 45B, and the third member 46 is rotatable around the axis Z of the second movable member 45B. .

  With such a configuration, the support device 42 can freely change the posture of the monitor 41 (the direction of the video display surface).

  A driving means (not shown) such as a motor is connected to each axis X, Y, and Z of the support device 42 so that each driving means can be operated by a remote operation means (not shown) such as a remote controller. It is composed. The support device 42 can change the posture of the monitor 41 (the angle of the display surface) from a place away from the monitor 41, and a person viewing the monitor 41 operates a remote controller or the like from the viewing place. The monitor 41 can be adjusted to an angle at which it can be easily seen.

  Further, as shown in FIG. 3, for example, the support device 42 is provided between the first member 44 and the second member 45 (more specifically, the first display 44 can be reversed 180 degrees). A plurality of arm portions 47 and joint portions 48 may be additionally provided between one movable member 44B and the second holding member 45A. According to such a configuration, the degree of freedom in the position and orientation in which the monitor 41 is displayed can be further increased.

That is, in the crane 1 that is a work vehicle according to an embodiment of the present invention, the support device 42 that supports the monitor 41 so that the angle of the monitor 41 can be changed with respect to the top boom member 22f that is the tip of the telescopic boom 22. It is attached through.
In the crane 1 having such a configuration, the monitor 41 can be directed to a person who can be surely viewed regardless of the length or tilt angle of the telescopic boom 22, thereby further expanding the applications of the crane 1. Can do.

Here, the usage example of the crane 1 provided with the camera 31 and the external display apparatus 40 is demonstrated using FIG.
As shown in FIG. 4, in the crane 1, the camera 31 is attached to the main hook block 23, so that the camera 31 is placed at a position lower than the ground contact surface of the crane 1 by extending the main wire rope 27 from the main winch 26. Can be arranged.
For example, as shown in FIG. 4, when there is an object to be photographed (accident vehicle, etc.) under a cliff (under an overpass, under a bridge pier), the camera 31 is installed while the crane 1 is installed on the cliff (over an overpass, on a bridge) An accident situation can be photographed by approaching the object to be photographed.

  Furthermore, since the crane 1 is configured to include the external display device 40, as shown in FIG. 4, the image taken by the camera 31 is visually recognized by all workers on the cliff by the monitor 41, and the situation under the cliff It becomes possible to share information concerning the above in real time between workers.

  As described above, in the crane 1, the external display device 40 is attached to the top boom member 22 f of the telescopic boom 22 and the camera 31 is attached to the main hook block 23. The crane 1 can be used for new applications.

That is, the crane 1 which is a work vehicle according to an embodiment of the present invention includes a telescopic boom 22, a traveling vehicle 10 that supports the telescopic boom 22 movably, and a camera that captures the surroundings of the telescopic boom 22 and the traveling vehicle 10. 31 and a monitor 41 that displays an image captured by the camera 31, and the monitor 41 is attached to a top boom member 22 f that is the tip of the telescopic boom 22.
In the crane 1 having such a configuration, it is possible to make it possible for a person other than the operator to visually recognize an image taken by the camera 31, and thus the crane 1 can be used for various purposes.

The crane 1 according to an embodiment of the present invention further includes a main winch 26, a main wire rope 27 fed out from the main winch 26, and a main hook block 23 supported by the main wire rope 27, and a camera. 31 is attached to the main hook block 23.
With such a configuration, the crane 1 can bring the camera 31 closer to the object to be photographed. This makes it possible to expand the shootable range and shoot a finer image. The application of the crane 1 can be expanded.

  In the crane 1 according to the embodiment of the present invention, the camera 31 attached to the main hook block 23 can be used as a conventionally known hanging load monitoring camera.

  Next, the overall configuration of an aerial work vehicle that is a work vehicle according to an embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 5, the aerial work vehicle 50 is a so-called boom type aerial work vehicle, and includes a traveling vehicle 51 and an aerial work device 52. In the present embodiment, the boom type aerial work vehicle 50 will be described as an example. However, the type of the aerial work vehicle according to the embodiment of the present invention is not limited to this, for example, a part of the boom. May have a mechanism that refracts, or may have a scissor-type support leg that can be raised and lowered only in the vertical direction. The concept of “expanding / contracting” of the boom includes a mode in which the boom is folded or stretched to change its length (maximum reach position).

The traveling vehicle 51 conveys the aerial work device 52 and has a so-called truck form.
The traveling vehicle 51 is provided with a driver's cab 51b and a plurality of (four in this embodiment) wheels 53, 53, 53, 53 on a frame 51a, and an engine (not shown) as a power source is mounted. The traveling vehicle 51 is configured to travel by transmitting the driving force of the engine to a plurality of wheels 53, 53, 53, 53 in accordance with an operation from the cab 51 b.
Further, outriggers 54, 54, 54, and 54 are provided at the four corners of the traveling vehicle 51. The outrigger 54 includes a projecting beam that can be extended by hydraulic pressure on both sides in the width direction of the traveling vehicle 51 and a hydraulic jack cylinder that can extend in a direction perpendicular to the ground. The traveling vehicle 51 grounds the jack cylinder of the outrigger 54 so that the aerial work device 52 can be used, and the extending beam extends in the width direction of the traveling vehicle 51, thereby The workable range (working radius) can be expanded.

  The high place working device 52 lifts the bucket 55 on which the worker is boarded to a high place, and includes a swivel base 56, a telescopic boom 57, a hoisting cylinder 58, an operating device 59, and the like.

  The swivel base 56 supports the aerial work device 52 so as to be turnable on the loading platform of the traveling vehicle 51. The swivel base 56 is provided on the frame 51a of the traveling vehicle 51 via an annular bearing. The annular bearing is arranged such that the center of rotation is perpendicular to the installation surface of the traveling vehicle 51. The swivel base 56 is configured to be rotatable about the center of the annular bearing as a rotation center. The swivel base 56 is configured to be rotated by a hydraulic swivel motor (not shown).

  The telescopic boom 57 supports the bucket 55 and is composed of a plurality of boom members. Each boom member is formed in a hollow cylindrical shape having polygonal cross sections similar to each other. Each boom member is formed in a size that can be inserted thereinto in the order of the cross-sectional area. The telescopic boom 57 is configured such that each boom member is movable in the axial direction. That is, the telescopic boom 57 is configured to be telescopic by moving each boom member with an unillustrated telescopic cylinder or the like. The telescopic boom 57 is provided so that the base end of the boom member can swing on the swivel base 56. Further, the telescopic boom 57 is configured to be swingable about the base end of the boom member with respect to the swivel base 56.

  The bucket 55 is a cage-shaped part for securing a worker's work floor and work space. The bucket 55 is configured such that an operator can get inside. Bucket 55 is supported at the tip of telescopic boom 57 via support mechanism 55a. The support mechanism 55a swings the bucket 55 in the up-and-down direction and in the horizontal direction by a hydraulic actuator (not shown).

  The raising / lowering cylinder 58 raises and lowers the telescopic boom 57 to maintain the posture of the telescopic boom 57. The hoisting cylinder 58 is composed of a hydraulic cylinder. The base of the hoisting cylinder 58 is swingably connected to the swivel base 56, and the tip of the rod is swingably connected to the telescopic boom 57. The hoisting cylinder 58 erects or falls the telescopic boom 57 by extending and contracting the rod.

  The operating device 59 operates the bucket 55, the swivel base 56, the telescopic boom 57, and the like. The operating device 59 is provided inside the traveling vehicle 51 and the bucket 55. The operation device 59 is provided with a swivel / extension operation tool for turning the swivel base 56 and a telescopic boom 57, a hoisting operation tool for raising / lowering the telescopic boom 57, an engine start switch, and the like.

  The aerial work vehicle 50 configured as described above can move the aerial work device 52 to an arbitrary position by causing the traveling vehicle 51 to travel. Further, the aerial work vehicle 50 raises the telescopic boom 57 at an arbitrary hoisting angle by the hoisting cylinder 58 and extends the telescopic boom 57 to an arbitrary boom length to move the bucket 55 of the high altitude working device 52. Can be enlarged.

Here, the external display device provided in the aerial work vehicle 50 will be described.
As shown in FIG. 5, the aerial work vehicle 50 is provided with an external display device 40 in a bucket 55 attached to the tip of the telescopic boom 57. The external display device 40 is the same as described above, and the monitor 41 is attached to the bucket 55 attached to the distal end portion of the telescopic boom 57 via a support device 42 that supports the angle of the monitor 41 so as to be changeable. ing.

In the aerial work vehicle 50, a camera 60 is provided in the bucket 55.
In the aerial work platform 50, a mechanism for adjusting the angle (angle adjustment mechanism) is disposed between the camera 60 and the bucket 55, and the shooting direction of the camera 60 can be changed regardless of the angle change of the bucket 55. In this case, the angle adjustment mechanism is more preferably configured to be adjustable by remote operation.

  The external display device 40 is a device for displaying video captured by the camera 60, and includes a monitor 41, a support device 42, and the like. The aerial work vehicle 50 may be configured to include a monitor (not shown) similar to the conventional one in the vicinity of the operation device 59 so that the image of the camera 60 can be visually recognized by the monitor.

Here, a usage example of the aerial work vehicle 50 including the external display device 40 and the camera 60 will be described with reference to FIG.
As shown in FIG. 6, in the aerial work vehicle 50, the camera 60 is attached to the bucket 55, so that the camera 60 can be temporarily arranged at a high position from the ground by extending the telescopic boom 57. . FIG. 6 illustrates a case where an aerial work vehicle 50 is installed beside the temporary parking lot at the event venue.
Temporary parking lots do not have guidance facilities that indicate vacant location information of parking lots, and it is expected that people who come by car will take time to find vacant locations.

  If the aerial work vehicle 50 is used in such a case, the bucket 55 is arranged at a high position on the ground, the situation of the temporary parking lot is photographed by the camera 60, and the photographed video is taken to the outside attached to the bucket 55. The display device 40 can display in real time. A visitor can easily grasp a rough vacant position of the parking lot by looking at the video displayed on the monitor 41 at a high place, and can quickly find the vacant position.

  Further, the aerial work vehicle 50 may be configured such that an operator is mounted on the bucket 55, the operator confirms the empty position, and the empty position confirmed on the monitor 41 is highlighted. Alternatively, the aerial work vehicle 50 performs image processing on the video data captured by the camera 60 to automatically identify the vacant position, and the vacant position on the monitor 41 based on the vacant position information obtained from the image processing. It is good also as a structure which highlights.

  As described above, in the aerial work platform 50, the external display device 40 is attached to the bucket 55 at the tip of the telescopic boom 57 and the camera 60 is attached to the bucket 55, so that the conventional aerial work worker 50 can achieve this. It is possible to use the aerial work vehicle 50 for a new use that has not occurred.

That is, an aerial work vehicle 50 that is a work vehicle according to an embodiment of the present invention includes a telescopic boom 57, a traveling vehicle 51 that supports the telescopic boom 57 movably, and the periphery of the telescopic boom 57 and the traveling vehicle 51. A camera 60 to be photographed and a monitor 41 for displaying an image photographed by the camera 60 are provided, and the monitor 41 is attached to a bucket 55 attached to the distal end portion of the telescopic boom 57.
In the aerial work vehicle 50 having such a configuration, a person other than the operator can visually recognize an image taken by the camera 60, and thus the aerial work vehicle 50 can be used for various purposes. It becomes possible, and the use of an aerial work vehicle can be expanded.

1 Crane (work vehicle)
DESCRIPTION OF SYMBOLS 10 Traveling vehicle 22 Telescopic boom 23 Main hook block 26 Main winch 27 Main wire rope 31 Camera 41 Monitor 42 Support apparatus 50 Work vehicle at high place (work vehicle)
51 traveling vehicle 55 bucket 57 telescopic boom 60 camera

Claims (4)

Telescopic boom,
A traveling vehicle that movably supports the boom;
A camera for photographing the boom and the periphery of the traveling vehicle;
A monitor that reflects images taken by the camera;
A work vehicle equipped with
The monitor,
Attached to the tip of the boom or a member attached to the tip.
A working vehicle characterized by that. The monitor,
For the tip of the boom or a member attached to the tip,
Mounted via a support device that supports the angle of the monitor in a changeable manner,
The work vehicle according to claim 1. The work vehicle is a crane,
Winch,
A wire rope fed out from the winch;
A hook block supported by the wire rope;
Further comprising
The camera,
Attached to the hook block,
The work vehicle according to claim 1, wherein the work vehicle is a vehicle. The work vehicle is an aerial work vehicle,
A bucket attached to the tip of the boom;
Further comprising
The camera,
Attached to the bucket,
The work vehicle according to claim 1, wherein the work vehicle is a vehicle.

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