JP2009167748A - Monitor device for construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitor device for a construction machinery capable of easily confirming a camera image in a display apparatus and also confirming a rear view with eyes without an operator changing his posture, while easing restrictions on a size of the display apparatus. <P>SOLUTION: A rear-view monitoring camera 24 is disposed on a counterweight 6 of the rear side of a car body, and the image from the rear view monitoring camera 24 is displayed in a monitor panel 25 in a driver's compartment 4. The monitor panel 25 is placed on a pillar at right rear side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a monitoring device for a construction machine that displays an image from a rear monitoring camera arranged at the rear of a vehicle body on a display.

  A construction machine such as a hydraulic excavator is provided with a lower traveling body and an upper revolving body that is turnably mounted on the lower traveling body, and an operator enters various types of cabs arranged on the upper revolving body. By operating an operation lever or the like, the vehicle body is moved forward / backward or turned, or a required work is performed using a work machine.

  By the way, for the operator who operates the machine in the cab, the front and sides of the operator can be easily seen by the operator's eyes from the window provided in the cab, but when looking at the back of the cab It is necessary to turn around the head and body or visually check with a mirror. In view of the fact that the operator's rear view is not sufficiently obtained in this way, a rear monitoring camera is installed at the rear of the vehicle body, and an image from this camera such as a liquid crystal display installed in the driver's cab is installed. There has been proposed and put to practical use by displaying it on a monitor device having a rear visual field so that the work can be performed without hindrance (see Patent Document 1).

  However, since the conventional monitor device is arranged alongside other instruments on the right front side of the operator, there is a problem that the size of the display device is limited in order to ensure forward visibility during work. is there. In addition, since the camera image is limited to a predetermined angle range at the rear of the vehicle body (a range that is a blind spot visually observed by the operator), it may be necessary to confirm the visual field of view from the rear. In such a case, the operator displays It is necessary to alternately check the camera image by the device and the visual confirmation of the rear field of view, and there is a problem that the confirmation operation of looking forward or turning back is extremely complicated and labor-intensive. .

JP 2005-155274 A

  The present invention has been made in view of the above-described problems. The operator can easily perform camera image confirmation by a display and visual confirmation of a rear view without changing the posture, and the display It is an object of the present invention to provide a construction machine monitoring device that can relax the restriction on the size of the construction machine.

In order to achieve the above object, a monitoring device for a construction machine according to the present invention comprises:
In the monitoring device of the construction machine, which is provided in the cab of the construction machine having the cab on the left side of the vehicle body, and displays an image from the rear monitoring camera arranged at the rear of the vehicle body on the display of the monitor device,
The indicator is arranged in the right rear part of the driver's seat in the driver's cab.

  In the present invention, the driver's cab has a right front pillar, a left front pillar, a right rear pillar, and a left rear pillar arranged at four corners, and the cross-sectional area of the rear pillar is greater than the cross-sectional area of the front pillar. Preferably, the indicator is attached to the right rear pillar of the cab. The indicator may be mounted on a console box arranged at the rear of the cab. Moreover, the said indicator may be provided so that attachment or detachment is possible.

  According to the present invention, the display device that displays the image (video) from the rear monitoring camera is arranged in the right rear part of the driver's seat. When turning back to check the field of view, an indicator is placed in front of the position where the camera was turned, so the operator can check the rear field of view visually, check the camera image on the display, in other words, Thus, it is possible to easily confirm the situation behind the vehicle body in the blind spot portion almost simultaneously and without changing the posture. In this way, it is possible to reduce the labor of the operator's backward confirmation work.

  In the present invention, if the indicator is attached to the right rear pillar of the cab, the indicator is provided in front of the rear pillar that is formed thicker than the front pillar in order to ensure rigidity when the vehicle falls. Therefore, the display device can be arranged at an appropriate position without hindering the visual field of the operator's rear view. Also, the same effect can be obtained when mounted on the console box. Furthermore, if the display is detachably provided, it is convenient that the display can be installed at an easy-to-see position according to the preference of the operator.

  Next, a specific embodiment of the monitoring device for a construction machine according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a side view of a hydraulic excavator according to an embodiment of the present invention, and FIG. 2 shows a plan view in which the hydraulic excavator is partially omitted. FIG. 3 is a perspective view showing a partially broken upper revolving body of the hydraulic excavator, and FIG. 4 is a partial perspective view of the inside of the cab. This embodiment shows an example applied to a hydraulic excavator as an example of a construction machine.

  A hydraulic excavator 1 according to the present embodiment includes a crawler-type lower traveling body 2, an upper revolving body 3 that is turnably mounted on the lower traveling body 2, and an upper revolving body 3 on the left front side. A driver's cab (cab) 4 disposed, a working machine 5 disposed on the right side of the driver's cab 4, a counterweight 6 disposed at the rear, and the like are provided. The work machine 5 includes a boom 7, an arm 8 attached to the tip of the boom 7, and a bucket 9 attached to the tip of the arm 8, and the boom 7, the arm 8, and the hydraulic cylinders 10, 11, and 12 Excavation work such as earth and sand is performed while moving the bucket 9 up and down.

  As shown in FIG. 3, the cab 4 has a right front pillar 13, a left front pillar 14, a right rear pillar 15, and a left rear pillar 16 arranged at four corners. An intermediate pillar 17 for forming the doorway is arranged at a predetermined position. Here, the cross-sectional area of the rear pillars 15, 16 is made larger than the cross-sectional area of the front pillars 13, 14, thereby increasing the cross-sectional strength of the rear pillars 15, 16, and the rear pillars 15, 16. As a main member, rigidity as a frame structure of the cab 4 is secured. This is a structure based on the premise that a space around the head of the operator is secured even if the excavator falls down and the cab collapses.

  As shown in FIG. 4, a driver's seat 18 for an operator to sit and perform various operations is provided inside the operator's cab 4. A pair of consoles 19 and 20 in which devices and the like are housed in one cabinet are disposed, and a rear console 21 for accommodating electrical components is disposed behind the driver's seat 18. 3 and 4, reference numeral 22 indicates the right side window, and reference numeral 23 indicates the rear window.

  As shown in FIGS. 1 and 2, the hydraulic excavator 1 is provided with a rear monitoring camera 24 in the upper central portion of the counterweight 6 in order to ensure a rear view by the operator. Then, the video acquired by the rear monitoring camera 24 is displayed on a display device (hereinafter referred to as “monitor panel”) 25 of the monitor device in the cab 4. The monitor panel 25 is composed of a liquid crystal display. As shown in FIG. 4, the monitor panel 25 can be detachably attached to a bracket (not shown) attached to an intermediate portion of the right rear pillar 15 by bolts and nuts. It is attached. As described above, since the right rear pillar 15 has a larger cross-sectional area than the front pillars 13 and 14, even if the monitor panel 25 has a relatively large screen, the right side window 22 and the rear part The window 23 does not overhang, and the monitor panel 25 does not block the rear view of the operator.

  As shown in FIG. 1, the imaging range of the rear monitoring camera 24 is rearward of the counterweight 6 in the vertical direction that is beyond the rear vertical direction field of view θ1 visually observed from the rear window 23 when the operator turns around. This is a range that covers the lower vertical field of view θ2, and in the horizontal direction, as shown in FIG. 2, covers the rear lower horizontal field of view θ4 that is slightly larger than the rear horizontal field of view θ3 viewed from the rear window 23. It is a range. Here, if the lateral horizontal field of view θ5 visually observed from the right side window 22 by the operator is taken into consideration, the lateral and rearward images can be seen in both the horizontal direction and the vertical direction depending on the visual observation and the image by the rear monitoring camera 24. Almost all fields of view can be secured.

  According to the present embodiment, since the monitor panel 25 that displays the image from the rear monitoring camera 24 is attached to the middle part of the right rear pillar 15 that is the right rear part of the driver's seat 18, the operator can turn upward, for example. In turning operation of the body 3, when turning back to visually confirm the rear view, the monitor panel 25 is arranged in front of the turned position, so that the operator does not change the posture, At substantially the same time as confirming the rear view and the side view by visual observation, the screen of the monitor panel 25 can be seen, and the situation of the rear lower part of the vehicle body, which is a blind spot portion that cannot be visually confirmed by the image displayed on the monitor panel 25 Can be confirmed. Therefore, the operator can easily check the rear view of the rear panel as compared with the conventional example in which the monitor panel for displaying the image of the rear monitoring camera 24 is provided in the front part of the cab, thereby reducing the labor of the operator. Can be planned.

  Further, since the monitor panel 25 is installed in front of the right rear pillar 15 having a larger cross-sectional area with respect to the right front pillar 13, it is compared with the case where the monitor panel is installed in front of the right front pillar 13. Thus, a monitor screen having a larger screen can be used, which also facilitates the operator's rear view confirmation work. In addition, a monitor panel is installed in front of the right front pillar 13 as usual, and a monitor function display of a vehicle state, a switch function display related to operation of the vehicle, and the like are made on the monitor panel. An image by the rear monitoring camera 24 similar to the rear monitor panel 25 is displayed. Therefore, the operator can confirm the situation of the rear lower part of the vehicle body by using the front monitor panel as necessary.

  FIG. 5 is a perspective view showing another embodiment of the monitor panel mounting position. In the present embodiment, the same reference numerals are given to the portions common to the previous embodiment, and the detailed description thereof is omitted (the same applies to the following embodiments).

  In the present embodiment, the monitor panel 25 is detachably attached to a bracket attached to the upper portion of the right rear pillar 15 and the boundary with the ceiling portion 26 by bolts and nuts. In such a case, the operator can turn back and check the monitor image by turning his eyes slightly upward when checking the visual rear view and the side view. Similar effects can be obtained.

  FIG. 6 is a perspective view showing still another embodiment of the monitor panel mounting position.

  In the present embodiment, the monitor panel 25 is disposed on the console box of the rear console 21 disposed behind the driver's seat 18 and is detachably disposed at the right rear position of the operator. Even with such a configuration, the same operational effects as those of the above-described embodiments can be obtained. Note that a part of the console box may be cut out, and the monitor panel 25 may be attached to the cutout portion.

  In each of the above-described embodiments, the monitor panel 25 is detachably provided. Therefore, according to the preference of the operator, the position shown in FIG. 4, the position shown in FIG. 5, or the position shown in FIG. It can be installed at an easy-to-see position. Of course, the monitor panel 25 does not necessarily have to be detachable, and can be attached to the bracket by welding.

  In each of the above embodiments, a hydraulic excavator has been described as an example. However, the present invention can naturally be applied to construction machines other than the hydraulic excavator. In particular, when applied to a construction machine having an upper-part turning body, it is preferable because the visibility of the rear of the vehicle body and the side of the vehicle body during turning can be surely confirmed.

1 is a side view of a hydraulic excavator according to an embodiment of the present invention. The top view which abbreviate | omits and shows the hydraulic excavator of this embodiment partially The perspective view which represents the upper revolving body in the hydraulic excavator of this embodiment partially broken Partial perspective view of the cab in the present embodiment The perspective view showing other embodiments of a monitor panel attachment position The perspective view showing other embodiment of a monitor panel attachment position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Lower traveling body 3 Upper turning body 4 Driver's cab 6 Counterweight 15 Right rear pillar 18 Driver's seat 21 Rear console 22 Right side window 23 Rear window 24 Rear monitoring camera 25 Monitor panel (display)
26 Ceiling

Claims (4)

In the monitoring device of the construction machine, which is provided in the cab of the construction machine having the cab on the left side of the vehicle body, and displays an image from the rear monitoring camera arranged at the rear of the vehicle body on the display of the monitor device,
A monitoring device for a construction machine, wherein the indicator is arranged at a right rear portion of a driver's seat in a driver's cab.   In the cab, the right front pillar, the left front pillar, the right rear pillar, and the left rear pillar are arranged at the four corners, and the sectional area of the rear pillar is larger than the sectional area of the front pillar. The construction machine monitoring device according to claim 1, wherein the indicator is attached to a right rear pillar of the cab.   The monitoring device for a construction machine according to claim 1, wherein the indicator is mounted on a console box disposed at a rear portion of a cab.   The monitoring device for a construction machine according to claim 2 or 3, wherein the indicator is detachably provided.

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