JP2016183033A - Crane vehicle blind spot image display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dead angle image display system of a crane truck which enables an operator to view a dead angle area without causing discomfort to the operator.SOLUTION: A dead angle image display system 101 of a crane truck 1 includes: a television camera 110 which captures images of a dead angle area B located at a vehicle front side and blocked by a boom 7 in a visual field from a driver seat 4a to obtain a dead angle image; and a projection device 120 which projects and displays the dead angle image on a side surface 71a side of the boom 7 which is viewable from the driver seat 4a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a blind spot image display system for a crane vehicle that is used to display a blind spot image in front of a vehicle that is blocked by a boom in a view from a driver's seat.

  2. Description of the Related Art Conventionally, a crane vehicle is generally provided with a boom that can be raised and lowered beside a cabin. Since such a crane vehicle travels in a state in which the boom is laid down and stored, the boom protrudes forward of the vehicle during traveling. Therefore, there is a blind area in front of the vehicle that is blocked by the boom in the field of view from the driver's seat.

  In order for the driver to visually recognize this blind spot area, for example, a blind spot video display system as shown in Patent Document 1 has been proposed. In this blind spot video display system, a blind spot area is captured by a television camera to acquire a blind spot video, and the blind spot video is displayed on a monitor provided in a cabin.

JP 2000-247572 A

  However, when the blind spot image is displayed on the monitor, the blind spot area on the other side of the boom is displayed in front of the driver, and thus the driver moves his line of sight and the accompanying head movement increases during traveling. For this reason, the driver's field of vision becomes unnatural, and the driver feels uncomfortable.

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a crane blind spot image display system capable of visually recognizing a blind spot area without giving a driver a sense of incongruity. .

  As a result of intensive studies, the present inventors have adopted the following blind spot image display system for a crane vehicle in order to solve the above-mentioned problems.

  The blind spot image display system for a crane vehicle according to the present invention includes a television camera that captures a blind spot area in front of a vehicle that is blocked by a boom in a field of view from the driver's seat and obtains a blind spot picture, and the blind spot picture from the driver's seat. And a projection device that projects and displays on the side of the side of the boom that is visible.

  In the crane blind spot image display system according to the present invention, it is preferable that the imaging direction of the television camera is matched with the direction of the line of sight of the driver in the driver's seat toward the blind spot area.

  Also, in the blind spot image display system for a crane vehicle according to the present invention, the projection device is configured to view the blind spot image within a visual field range when a driver of the driver's seat faces the front of the vehicle on a side surface of the boom. It is preferable to display in the portion where is hit.

  In the blind spot image display system for a crane vehicle of the present invention, the blind spot image in front of the vehicle that is blocked by the boom in the view from the driver's seat is projected and displayed on the side surface of the boom visible from the driver's seat. That is, the blind spot area on the other side of the boom is displayed on the side of the boom that is visible from the driver's seat. For this reason, compared with the case where the blind spot area is displayed in front of the driver, it is possible to reduce the movement of the driver's line of sight and the movement of the head associated therewith, and to make the driver's field of view a natural state. It becomes possible. Therefore, the blind spot image display system for a crane truck according to the present invention can visually recognize the blind spot area without causing the driver to feel uncomfortable.

  Further, in the blind spot video display system of the crane vehicle of the present invention, the blind spot area that the driver wants to visually recognize is surely displayed by matching the imaging direction of the TV camera with the direction of the line of sight of the driver at the driver's seat toward the blind spot area. It becomes possible to do. Therefore, the blind spot image display system of the crane vehicle of the present invention can further improve the visibility of the blind spot area.

  Further, in the blind spot image display system of the crane vehicle of the present invention, the projection device displays the blind spot image on the side of the boom on the side where the line of sight hits within the field of view when the driver of the driver's seat faces the front of the vehicle. As compared with the case where the blind spot image is displayed outside the visual field range when the driver faces the front of the vehicle, the movement of the driver's line of sight and the accompanying head movement can be reduced. Therefore, it becomes possible to make a driver | operator's visual field a more natural state. Therefore, the blind spot image display system of the crane vehicle of the present invention can visually recognize the blind spot area without giving the driver a more uncomfortable feeling.

1 is a left side view of a crane truck showing an embodiment of the present invention. It is a top view of the crane truck of the embodiment. It is a figure when the vehicle front is seen from the driver's seat of the crane car of the embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a left side view of a mobile crane 1 (rough terrain crane) showing an embodiment of the present invention. FIG. 2 is a top view of the crane vehicle 1. First, the overall configuration of the crane vehicle 1 will be briefly described. The crane vehicle 1 includes a carrier 2 that is a vehicle body having a traveling function, a swivel base 3 that is attached to an upper part of the carrier 2 so as to be horizontally turnable, and a cabin 4 provided on the swivel base 3.

  A pair of left and right outriggers 5 and 5 (only the left side is shown) are provided on the front side and the rear side of the carrier 2, respectively. A boom support 6 is fixed on the upper side of the swivel base 3. A boom 7 is attached to the boom support 6.

  Further, the arrangement relationship between the cabin 4 and the boom 7 will be described with reference to FIG. 2. The cabin 4 is arranged on the right side with respect to the vehicle traveling direction A on the turntable 3, and the boom 7 is arranged on the left side of the cabin 4. Has been.

  As shown in FIG. 1, the boom 7 is disposed horizontally when not in use, such as during travel. The base of the boom 7 is attached to the boom support 6 via a boom root fulcrum pin (not shown), and can be raised and lowered around the boom root fulcrum pin. A hoisting cylinder (not shown) is interposed between the boom support 6 and the boom 7. The boom 7 is raised and lowered when the raising and lowering cylinder expands and contracts.

  The boom 7 includes a proximal boom 71, intermediate booms 72 to 73, and a distal boom 74, and is nested in the proximal boom 71 in this order from the outside to the inside. Each boom 71-74 is connected with an expansion cylinder (not shown) inside, and expands and contracts when each expansion cylinder expands and contracts.

  As shown in FIGS. 2 and 3, an operation unit 40 is provided in the driver's seat 4 a provided in the cabin 4. The operation unit 40 is configured such that the driver P of the driver seat 4a turns the swivel 3, raises / lowers the boom 7, winds up / down a winch (not shown) provided on the boom support 6, and each outrigger 5. Is used to perform operations such as projecting and retracting the engine and starting and stopping the engine.

  Next, the structure of the blind spot image display system 101 of this invention provided in this crane vehicle 1 is demonstrated using FIGS. 1-3.

  As shown in FIG. 2, the blind spot image display system 101 includes a television camera 110, a projection device 120 connected to the television camera 110, and a start switch 130 connected to the television camera 110 and the projection device 120. Yes.

  As shown in FIGS. 1 and 2, the television camera 110 is attached to the distal end portion of the left side surface 71 b of the base end boom 71 via a support member 140 and is disposed on the left side of the distal end of the boom 7. The television camera 110 is configured to capture a blind spot area B in front of the vehicle that is blocked by the boom 7 in the field of view from the driver's seat 4a and obtain a blind spot image C (see FIG. 3). The blind spot area B is specifically an area in front of the vehicle on the left side of the boom 7 in the field of view from the driver's seat 4a.

  Further, as shown in FIG. 2, the TV camera 110 has an attachment position set so that the imaging direction thereof matches the direction of the line of sight S toward the blind spot area B of the driver P of the driver seat 4a. More specifically, the mounting position of the television camera 110 is set so that the optical axis 110L is on an extension line of the line of sight S (on the same line as the line of sight S).

  As shown in FIGS. 1 and 2, the projection device 120 is attached to the right end of the front portion of the carrier 2 (for example, the front end of the frame). As shown in FIGS. 2 and 3, the projection device 120 projects and displays the blind spot image C on the side surface of the boom 7 (the right side surface 71a side of the proximal boom 71) visible from the driver's seat 4a. It is configured.

  Specifically, as shown in FIG. 3, the projection device 120 displays the blind spot image C within the visual field range when the driver P of the driver's seat 4 a faces the front of the vehicle on the right side surface 71 a of the base end boom 71. Is displayed on the portion 71s where the line of sight S hits.

  The start switch 130 is provided in the cabin 4 as shown in FIG. The activation switch 130 is configured to drive the television camera 110 and the projection device 120 when turned on.

  Next, a method of using the blind spot image display system 101 will be described. The driver P in the driver's seat 4a determines whether or not the crane vehicle 1 is in a state where it can travel on the road, and turns on the start switch 130 when determining that the crane vehicle 1 is in a state where it can travel on the road. .

Examples of conditions for determining whether or not the crane vehicle 1 is capable of traveling on the road include the following conditions for determination.
(1) The boom 7 is stored lying down.
(2) The outrigger 5 is not grounded.
(3) The outrigger 5 is stored.
(4) A PTO switch (not shown) is turned off.

  The PTO switch is a switch that activates a PTO (power take-off: not shown) that supplies power to a hydraulic pump (not shown) that drives the swivel 3, the boom 7, and the like.

  When the activation switch 130 is turned on by the driver P, the television camera 110 and the projection device 120 are driven.

  The television camera 110 captures a blind spot area B in front of the vehicle from the time of stopping to travel to acquire a blind spot video C, converts the blind spot video C into an electrical signal (video signal), and sends the electrical signal (video signal) to the projection device 120.

  The projection device 120 converts the video signal sent from the television camera 110 into a blind spot image C, and projects and displays it on the right side surface 71 a of the proximal boom 71. Specifically, as shown in FIG. 3, the projection device 120 has a blind spot image on a portion 71 s where the line of sight S hits within the field of view when the driver P of the right side surface 71 a driver seat 4 a of the proximal boom 71 faces the front of the vehicle. C is displayed.

  Next, effects of the blind spot image display system 101 of the present embodiment will be listed and described.

(1) The blind spot image display system 101 of the crane vehicle 1 according to the present embodiment captures the blind spot area B in front of the vehicle that is blocked by the boom 7 in the field of view from the driver's seat 4a and acquires the blind spot picture C. A camera 110 and a projection device 120 that projects and displays the blind spot image C on the side surface side (right side surface 71a side) of the boom 7 visible from the driver's seat 4a.

  That is, in the blind spot image display system 101 of the crane vehicle 1 of the present embodiment, the blind spot image C is projected and displayed on the right side 71a side of the boom 7 that can be viewed from the driver's seat 4a. Thereby, the blind spot area B on the other side of the boom 7 is displayed from the driver's seat 4a to the right side 71a side.

  For this reason, compared with the case where the blind spot area B is displayed in front of the driver P, the movement of the driver's line of sight while traveling and the movement of the head associated therewith can be reduced, and the driver's P field of view can be reduced naturally. It becomes possible to be in a proper state. Therefore, the blind spot image display system 101 of the crane vehicle 1 of the present embodiment can visually recognize the blind spot area B without giving the driver P a sense of incongruity.

(2) Further, in the blind spot video display system 101 of the crane vehicle 1 of the present embodiment, the imaging direction of the TV camera 110 is adjusted to the direction of the line of sight S toward the blind spot area B by the driver P of the driver seat 4a. did.

  This makes it possible to reliably display the blind spot area B that the driver P wants to visually recognize. Therefore, the blind spot image display system 101 of the crane vehicle 1 of the present embodiment can further improve the visibility of the blind spot area B.

(3) Moreover, in the blind spot image display system 101 of the crane vehicle of the present embodiment, the projection device 120 displays the blind spot image C when the driver P of the driver's seat 4a faces the front of the vehicle on the right side surface 71a of the boom 7. It was made to display on the part 71s where line of sight S hits within the visual field range.

  This makes it possible to reduce the movement of the driver P's line of sight and the accompanying movement of the head as compared to the case where the blind spot image C is displayed outside the visual field range when the driver P faces the front of the vehicle. . Therefore, it becomes possible to make the field of view of the driver P more natural. Therefore, the blind spot image display system 101 of the crane vehicle 1 of the present embodiment can visually recognize the blind spot area A without giving the driver P a more uncomfortable feeling.

  As mentioned above, although embodiment which concerns on this invention was illustrated, this embodiment does not limit the content of this invention. Various modifications can be made without departing from the scope of the claims of the present invention.

  For example, in the blind spot image display system 101 according to the embodiment, the television camera 110 is arranged at the tip of the boom 7, but the arrangement position of the television camera 110 is not limited to this position. Other arrangement positions include, for example, the front part of the carrier 2 (for example, the front end of the frame). Also in this case, it is preferable to install the television camera 110 so that the optical axis 110L and the line of sight S are in the same straight line.

  Further, in the blind spot image display system 101 according to the embodiment, the projection device 120 is disposed in the front portion of the carrier 2, but the position of the projection device 120 is not limited to this position. Examples of other arrangement positions of the projection device 120 include the tip of the boom 7.

  Further, the blind spot image display system 101 of the embodiment is applied to the crane vehicle 1 in which the cabin 4 is arranged on the right side with respect to the vehicle traveling direction A on the turntable 3 and the boom 7 is arranged on the left side of the cabin 4. However, the blind spot image display system 101 may be applied to a crane vehicle in which the positions of the cabin 4 and the boom 7 are reversed.

  In this case, the blind spot area in front of the vehicle captured by the television camera 110 is an area in front of the vehicle on the right side of the boom 7 in the field of view from the driver's seat. The projection device 120 displays the blind spot image on the left side surface 71b of the boom 7 in a portion where the line of sight hits within the visual field range when the driver in the driver's seat faces the front of the vehicle. By configuring in this way, the same effects as those described in the embodiment can be obtained.

  In the blind spot image display system 101 according to the embodiment, the driver P determines that the crane vehicle 1 is in a road travelable state and turns on the start switch 130 to drive the TV camera 110 and the projection device 120. However, the television camera 110 and the projection device 120 may be driven by automatically detecting that the vehicle is capable of traveling on the road.

  In the blind spot image display system 101 of the embodiment, the blind spot image C is directly projected and displayed on the right side surface 71a of the boom 7. However, a projection sheet is pasted on the projected portion (the portion 71s where the line of sight S hits). Alternatively, the blind spot image C may be projected and displayed on the sheet or painted part. As a result, the visibility of the blind spot image C is improved, so that the driver P can visually recognize the blind spot area A without giving a sense of incongruity.

  In addition, when a control unit is provided between the television camera 110 and the projection device 120 and there is an obstacle in the blind spot image C acquired by the television camera 110, only the contour of the obstacle is more conspicuous than the surroundings in the control unit. As described above, processing for highlighting with a bright line or the like may be performed and sent to the projection apparatus 120. The brightness and color of the line are changed according to the ambient brightness. Thereby, the visibility of an obstruction can be improved. Furthermore, it is possible to highlight an obstacle requiring attention such as a person, a bicycle, a motorcycle, etc., which is easily overlooked, thereby preventing oversight of the obstacle requiring attention.

  Further, when there is a road condition display object indicating a road condition such as a traffic light or a sign in the blind spot image C, a process of highlighting the road condition display object with a bright line or the like so as to stand out from the surroundings in the control unit. You may make it send to the projection apparatus 120. Also in this case, the brightness and color of the line are changed according to the ambient brightness and the like. Thereby, the visibility of a road condition display thing can be improved.

  Moreover, although the blind spot image display system 101 of the embodiment has been described as applied to a rough terrain crane, it may be applied to a crane vehicle (a truck crane, an all terrain crane, or the like) having other booms.

DESCRIPTION OF SYMBOLS 1 Crane vehicle 4a Driver's seat 7 Boom 71a Right side surface 71s of a boom The part which a line of sight hits 101 Blind spot image display system 110 Television camera 120 Projector B Blind spot area C Blind spot picture P Driver S Line of sight

Claims (3)

A television camera that captures a blind spot area in front of the vehicle that is blocked by the boom in a view from the driver's seat and acquires a blind spot image;
A blind spot image display system for a crane vehicle, comprising: a projection device that projects and displays the blind spot image on a side surface of the boom visible from the driver's seat. The blind spot image display system for a crane vehicle according to claim 1,
A blind spot image display system for a crane vehicle, wherein an imaging direction of the television camera is matched with a direction of a line of sight of a driver in the driver's seat toward the blind spot area. In the blind spot image display system of the crane vehicle according to claim 1 or 2,
The projection device displays the blind spot image on a side of the boom on a portion where a line of sight hits within a visual field range when a driver of the driver's seat faces the front of the vehicle. Blind spot video display system.