JP2005289580A - Vehicle stop position notification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle stop position notification device for notifying a stop position of a vehicle with respect to a crane. <P>SOLUTION: The vehicle stop position notification device is a device for notifying the stop position of the vehicle 16 at the time of loading/unloading a container 10 by the container crane 12. The device is arranged above a vehicle-traveling lane 14 and equipped with a light source 18 for emitting a flat light beam having a single wave length along the width direction of the vehicle-traveling lane 14 to the stop position of the vehicle 16 which changes according to the size of the container. A light receiving sensor 20 is provided on an upper part of the vehicle 16 traveling on the lane 14 so as to be capable of receiving the light emitted from the light source 18. A means for notifying the stop position of the vehicle by sensing the light reception of the light receiving sensor 20 is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle stop position notification device, and more particularly to a vehicle stop position notification device that aligns a crane that handles a container on a quay and a vehicle that transports the container.

  Conventionally, the position of the crane and the chassis is adjusted once by the chassis operator who operates the chassis so that the chassis is stopped at the position where the container or the container spreader descends after stopping once at the chassis stop position. This alignment requires the cooperation and skill of the crane operator who operates the crane and the chassis operator, and is one of the most difficult tasks among cargo handling operations.

Patent Documents 1 to 3 disclose an invention for aligning a crane and a chassis. The chassis position detection device disclosed in Patent Literature 1 detects position information by attaching a light-emitting body that blinks on the side of the chassis and detecting the position with a plurality of cameras. The position is detected. Moreover, the vehicle stop position alerting | reporting apparatus disclosed by patent document 2 attached the reflecting member to the side surface center of a chassis, and the chassis was decided with respect to the crane by detecting the position with the beam sensor provided in the crane. The crane detects that it is in the position and informs the vehicle of this by the operation of the indicator light. Furthermore, the stop position detection device for a transport vehicle disclosed in Patent Document 3 has a reflecting member attached to the center of the side surface of the chassis, and the position is detected by a laser beam scanning sensor provided on the crane. The relative position is detected on the crane side.
JP-A-5-71914 Japanese Patent Laid-Open No. 8-101011 JP-A-10-236770

  When detecting the position of the chassis from the lateral direction, especially when a plurality of chassis entered under the crane, the chassis that entered the lane closest to the crane leg structure in a plane could be aligned. However, the chassis that has entered another lane has a problem that the position of the chassis cannot be detected because the detection means such as the reflecting member and the sensor are hidden by the other chassis and obstacles. Further, since the crane side detects the relative displacement amount between the crane and the vehicle, the chassis side, which has the role of positioning, needs to receive the information by some means and perform positioning.

  The present invention has been made to solve the above problems, and provides a vehicle stop position notification device that notifies a crane of a stop position of a vehicle even when the vehicle enters any of a plurality of lanes. For the purpose.

  In order to solve the above problems, a vehicle stop position notification device according to the present invention is a device that notifies a vehicle stop position at the time of container loading / unloading by a container crane, and is disposed above a vehicle travel lane. A light source for irradiating a planar light beam having a single wavelength along the width direction of the vehicle traveling lane toward the stop position of the vehicle that changes according to the container size is provided, and a light receiving sensor is provided on the upper part of the vehicle traveling on the lane The light emitted from the light source can be received, and means for notifying the vehicle stop position by sensing the light received by the light receiving sensor is provided.

  The light receiving sensor includes a plurality of light receiving elements, and is provided along a vehicle traveling direction, and calculates a displacement amount from the light receiving element that senses the beam and the light receiving element corresponding to the stop position of the vehicle. An arithmetic processing unit for outputting to the notification means is provided.

Further, a plurality of light sources are provided so that a plurality of light sources can be irradiated in the direction of the vehicle lane by changing the wavelength according to the container size.
In addition, a filter that transmits only light having a specific wavelength emitted from the light source is provided on the upper surface of the light receiving sensor.

  The vehicle stop position notification device according to the present invention as described above can notify the vehicle stop position to the vehicle side by receiving light emitted from the light source by a light receiving element provided in the vehicle. Information for positioning the vehicle with respect to can be obtained. In addition, the relative displacement between the crane and the vehicle can be detected on the vehicle side, which has the role of positioning, so that it can be positioned by operating on the vehicle side without transmitting the displacement to the vehicle as in the past. .

  Hereinafter, preferred embodiments of the vehicle stop position notification device according to the present invention will be described. FIG. 1 is an explanatory diagram of a vehicle stop position notification device. Fig.1 (a) is a top view of the location in which the light source which comprises a vehicle stop position alerting | reporting apparatus was provided, The same figure (b) is a side view. FIG. 2 is an explanatory diagram of the light receiving sensor. A plurality of vehicle traveling lanes 14 are provided below the crane 12 that handles the container 10 between the ship and the quay, and a vehicle 16 such as a chassis or an automatic conveyance carriage that carries the container 10 enters along the lane 14. It is like that. A plurality of light sources 18 are provided on the beam of the crane 12 installed above the lane 14 and along the width direction of the lane 14. The light source 18 is provided for each lane 14 and spreads in a planar shape along the width direction of the lane 14 and emits light having a single wavelength downward. And the light irradiated from the light source 18 is irradiated only to the lane 14 provided with the light source 18, and is not irradiated to the adjacent lane 14. FIG. Such a light source 18 can irradiate light spreading in a plane along the width direction of the lane 14 by providing an optical means in front of the laser oscillator, for example. Further, by providing a filter that transmits light of a single wavelength in front of the lamp and an optical means such as a lens, it is possible to irradiate light that spreads in a plane along the width direction of the lane 14.

  Here, when the container 10 is loaded onto the vehicle 16, the position at which the container spreader is lowered is a position fixed to the crane 12. For this reason, the vehicle 16 that transports the container 10 must stop at a position where the container spreader is lowered, that is, at the same position for each cargo handling with respect to the crane 12. The light that is emitted from the light source 18 (light for stop position notification) is used as a reference for stopping the vehicle 16 at the same position for each cargo handling with respect to the crane 12.

  A plurality of light sources 18 are provided for each lane 14, and light is irradiated in a plurality of directions in the lane 14 (positions at which the vehicle 16 is stopped). In the present embodiment, three light sources 18 are provided, the light source 18 serving as a reference for the vehicle stop position when the container 10 having a length of 40 ft is loaded on the vehicle 16, and the container 10 having a length of 20 ft are connected to the vehicle 16. The light source 18 is used as a reference for the vehicle stop position when handling the vehicle forward, and the light source 18 is used as the reference for the vehicle stop position when handling the container 10 having a length of 20 ft behind the vehicle 16. The wavelengths of the light emitted from these light sources 18 may all be the same, and the wavelength of the light may be changed according to the container size.

  Further, a light receiving sensor 20 is provided on the upper portion of the vehicle 16 that is visible from the light source 18. In the case of the present embodiment, the light receiving sensor 20 is provided on the upper portion of the chassis towing vehicle. The light receiving sensor 20 is provided so that light emitted from the light source 18 enters the center of the light receiving sensor 20 when the vehicle 16 comes to a position where the vehicle 16 stops. The light receiving sensor 20 has a configuration in which a plurality of light receiving elements 22 are provided along the traveling direction of the vehicle 16 and a filter 24 is provided above the light receiving elements 22. The filter 24 selectively transmits the wavelength of light emitted from the light source 18 to prevent erroneous detection due to disturbance of sunlight. An arithmetic processing unit (not shown) is connected to the light receiving sensor 20, and a display unit (notification means) (not shown) for displaying instructions such as forward, stop, reverse, etc. of the vehicle 16 from the calculated result is provided in the vehicle. In this embodiment, the display unit is provided in the cab of the tow vehicle.

  Note that light is irradiated in different directions from the plurality of light sources 18 provided on each lane. Each light source 18 emits light in a planar shape, and the light is linear when viewed from the width direction of the lane 14. Furthermore, from the light source 18 provided on each lane 14, light is irradiated only to the lane 14 provided with the light source 18, and light is not irradiated to the adjacent lanes 14. Therefore, only light emitted from one light source 18 enters the light receiving sensor 20, and a plurality of lights emitted from the other light sources 18 do not enter.

  Next, an operation when determining the stop position of the vehicle 16 with respect to the crane 12 will be described. FIG. 3 is a diagram for explaining the operation of the light receiving sensor 20. In FIG. 3, the left side of the drawing is the forward direction of the vehicle 16. FIG. 4 shows a flow for explaining the operation of the arithmetic processing unit. From the light source 18, the planar light which spreads along the width direction of the lane 14 is irradiated toward the lane 14. FIG. Then, the vehicle 16 entering along the lane 14 receives the light by the light receiving sensor 20 provided in the upper part (S100). In the case of the present embodiment, the 40 ft container 10 is loaded on the vehicle 16 and the 20 ft container 10 is loaded on the front or rear of the vehicle 16, and cargo handling is performed from the light for stopping position notification that varies depending on the size and loading position of the container 10. In order to stop the vehicle 16 according to the container 10, the following operation may be performed by the driver of the vehicle 16. That is, when the wavelength of light emitted from the light source 18 differs depending on the size and stacking position of the container 10, an input device (not shown) is operated to select the wavelength of light according to the size and stacking position of the container 10 that performs cargo handling. The vehicle 16 may be stopped based on this light. When the wavelength of light emitted from the light source 18 is the same regardless of the size and stacking position of the container 10, the light emitted from the light source 18 is received in order, and the stop position is notified for the container 10 that handles the cargo. What is necessary is just to stop the vehicle 16 based on this light, when the light for use is received. For example, when handling the 40 ft container 10 in the present embodiment, the light for the 40 ft container is second from the entry side of the vehicle 16, and therefore the vehicle 16 is stopped based on the light received by the light receiving sensor 20 for the second time. Just do it.

  Thereafter, a signal notifying that the light has been received is output from the light receiving sensor 20 to the arithmetic processing unit, and a central position (light receiving center position) of the light in the light receiving sensor 20 is calculated in the arithmetic processing unit ( S102). The arithmetic processing unit stores a sensor position set value in advance (S104). Here, since the light receiving sensor 20 is attached to the upper portion of the vehicle 16 so that the detection target position is at the center, the sensor position setting value indicates the position of the tip of the sensor row. Then, the displacement a is calculated by taking the difference between the obtained light receiving center position and the sensor position set value (S106), and the light receiving center on the light receiving sensor 20 from the entire coordinate system including the crane 12 and the vehicle 16 is calculated. The position can be calculated.

  The plurality of light receiving elements 22 provided in the light receiving sensor 20 are divided into a plurality of light receiving element 22 groups. The distance from the forward direction of the vehicle 16 to the first light receiving element group is a1 and 2 from the forward direction of the vehicle 16. The first light receiving element group is designated as a2, followed by a3, a4, and a5. When the third light receiving element group is irradiated with light, the stop position of the vehicle is set, and when the vehicle 16 comes to the stop position, the light emitted from the light source 18 is not the second light receiving element group. In addition, the light receiving sensor 20 is provided on the upper portion of the vehicle 16 so as to enter the third light receiving element group. In the present embodiment, the light receiving sensor 20 is divided into five light receiving element groups, but the number to be divided is not limited to this.

  The arithmetic processing unit examines whether or not the displacement amount a is at the position a1 (S108), and if the displacement amount a is at the position a1, outputs a signal to the display unit. The forward lamp provided in is turned on (S110). If the displacement amount a is not at the position a1, it is examined whether the displacement amount a is at the position a2 (S112). If the displacement amount a is at the position a2, a signal is output to the display unit, and the minute forward lamp provided on the display unit is turned on (S114). If the displacement amount a is not at the position a2, it is examined whether the displacement amount a is at the position a3 (S116). If the displacement amount a is at the position a3, a signal is output to the display unit, and a stop position lamp provided on the display unit is turned on (S118). If the displacement amount a is not at the position a3, it is examined whether the displacement amount a is at the position a4 (S120). If the amount of displacement a is at the position a4, a signal is output to the display unit, and the micro-retreat lamp provided on the display unit is turned on (S122). If the displacement amount a is not at the position a4, it is examined whether the displacement amount a is at the position a5 (S124). If the displacement amount a is at the position a5, a signal is output to the display unit, and a backward lamp provided on the display unit is turned on (S126). If the displacement amount a is not at the position a5, the lamp provided on the display unit is turned off (S128).

The driver of the vehicle 16 moves the vehicle 16 based on the lighting of the lamp displayed on the display unit. That is, for example, when the forward lamp is lit on the display unit, the vehicle 16 is advanced, and when the stop position lamp is lit, the vehicle 16 is stopped. At this time, when the displacement amount a reaches the position a2, the minute advance lamp is lit. If the minute advance lamp is lit, the driver can slowly move the vehicle 16 forward so that the vehicle 16 can be stopped immediately. Good. Further, the vehicle 16 may be moved backward when the reverse lamp is lit on the display unit, and the vehicle 16 may be stopped when the stop position lamp is lit.
Then, the vehicle 16 stops at a position where the container spreader is lowered, and the vehicle 16 is positioned with respect to the crane 12.

  FIG. 5 is an explanatory diagram of the stop position of the vehicle 16 when the container 10 having a length of 20 ft is loaded onto the vehicle 16. FIG. 5A is a side view when the container 10 is mounted in front of the vehicle 16, and FIG. 5B is a side view when the container 10 is mounted behind the vehicle 16. When the 20ft container 10 is unloaded in front or rear of the vehicle 16, the light emitted from the light source 18 serving as a reference may be received and performed in the same manner as described above.

  In this way, light is emitted from above the lane 14 toward the vehicle 16 and is received by the light receiving sensor 20 provided on the upper portion of the vehicle 16, so that the light is blocked by another vehicle, an obstacle, or the like. There is nothing. Therefore, the stop position of the vehicle 16 can be notified to the crane 12 in any of the plurality of lanes 14. Further, since the light is flat and spreads in the width direction of the lane 14, the light can be received even if the vehicle 16 is shifted left and right with respect to the traveling direction, and the The 16 stop positions can be notified.

  Further, the light emitted from the light source 18 is received by the vehicle 16 and processed, and the amount of displacement of the vehicle 16 in the cab of the vehicle 16, that is, whether the vehicle 16 should be stopped, moved forward or backward, can be known. Positioning with respect to the crane 12 can be performed. Further, since a plurality of light receiving elements 22 constituting the light receiving sensor 20 are arranged along the traveling direction of the vehicle 16, the current displacement amount can be continuously detected.

In addition, since a plurality of light sources 18 are provided, the amount of displacement can be detected regardless of the length of the container 10 and the mounting location on the vehicle 16.
Therefore, the amount of deviation from the appropriate stop position of the vehicle 16 can be recognized by the difference in the position at which the light receiving sensor 20 receives light, and the vehicle 16 is operated based on the light receiving position and stopped at the appropriate stop position. Can be made.

  In this embodiment, the display unit is used as the notification unit. However, the notification may be performed using sound. In other words, a speaker is connected to the arithmetic processing means and provided in the cab of the vehicle 16, and the arithmetic processing unit first examines whether or not the displacement amount a is at the position a1, and the displacement amount a If a is in the position of a1, a signal may be output to the speaker and a voice may be given to advance the vehicle from the speaker. Similarly, if the displacement amount a is at the position a2, it may be indicated by voice that the vehicle 16 is slightly advanced through the speaker. The same applies when the displacement amount a is in the range from a3 to a5.

It is explanatory drawing of the vehicle stop position alerting | reporting apparatus which concerns on this Embodiment. It is explanatory drawing of the light reception sensor which concerns on this Embodiment. It is a figure explaining the effect | action of a light reception sensor. It is a flow explaining the effect | action of an arithmetic processing part. It is explanatory drawing of a vehicle stop position when handling a container with a length of 20 ft on a vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ......... Container, 14 ......... Lane (vehicle driving lane), 16 ......... Vehicle, 18 ......... Light source, 20 ......... Light receiving sensor, 22 ......... Light receiving element.

Claims (4)

A device for informing the vehicle stop position during container loading / unloading by a container crane,
A light source that is disposed above the vehicle lane and irradiates a single-wavelength planar light beam along the width direction of the vehicle lane toward the stop position of the vehicle that changes according to the container size;
A light receiving sensor is provided on the upper part of the vehicle traveling in the lane so that the light emitted from the light source can be received,
A vehicle stop position notifying device comprising means for notifying a vehicle stop position by sensing light reception by the light receiving sensor.   The light receiving sensor includes a plurality of light receiving elements, and is provided along a vehicle traveling direction, and calculates a displacement amount from the light receiving element that senses the beam and the light receiving element corresponding to the stop position of the vehicle. The vehicle stop position notification device according to claim 1, further comprising an arithmetic processing unit that outputs to the notification means.   2. The vehicle stop position notification device according to claim 1, wherein a plurality of the light sources are provided so that a plurality of light sources can be irradiated in a direction of the vehicle lane while changing a wavelength according to a container size. The vehicle stop position notification device according to claim 1, wherein a filter that transmits only light having a specific wavelength emitted from the light source is provided on an upper surface of the light receiving sensor.

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