JP2005330037A - Front visual confirmation device when wheel crane runs - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front visual confirmation device when a wheel crane runs having sufficient visibility while reducing cost using a convex mirror. <P>SOLUTION: The convex mirror 12 is attached to an upper face position of a telescopic boom 5 confirmed visually from an eye point 7 of a driver's cab 4 in such a way that at least a part of its reflection face 12a is positioned on an outer side of a side face 5b on the opposite side to the driver's cab of the telescopic boom when viewed in a plane. When the wheel crane 1 runs, a front part of the wheel crane can be visually confirmed by indirect visibility through the convex mirror 12 from the eye point 7 of the driver's cab. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention includes a swivel that is mounted on a traveling vehicle body so as to be turnable and includes a driver's cab for traveling and crane operation on one side of the swivel, and the operation in a state where the swivel is pivotally supported by the swivel stand so as to be laid down. The present invention relates to an apparatus for visually confirming a forward traveling time of a wheel crane having a telescopic boom that is stored below an eye point in a room.

  In this type of crane, the point in the cab is higher than the top of the telescopic boom when retracted, and the field of view in front of the opposite vehicle body across the telescopic boom is not directly visible due to the telescopic boom. was there.

  The applicant of the present application, as an invention to solve the above-mentioned problems, attached a TV camera to the front of the wheel crane at the tip of the swivel that is on the opposite side of the operator's cab across the telescopic boom, and an image taken with this TV camera A forward viewing device has been proposed in which a display for displaying the vehicle is provided in the cab and the front view of the wheel crane can be monitored with the display (see, for example, Patent Document 1).

According to the device for visually confirming a forward direction described in Patent Document 1, it is possible to secure a necessary field of view on the front side opposite to the driver's cab while sandwiching the telescopic boom during traveling.
JP 2002-20074 (page 2-3, FIG. 1-2)

  However, since a forward viewing device using a television camera and a display is expensive, development of a cheaper forward viewing device has been desired.

  Therefore, the present invention intends to propose a wheel crane forward-viewing device that has sufficient visibility while using a convex mirror, while having low cost.

  A wheel crane traveling front visual recognition device according to claim 1 of the present application is a swivel mounted on a traveling vehicle body so as to be able to swivel, and a traveling operation and a crane operation combined on one side of the swivel. A traveling front of a wheel crane comprising: a driver's cab; and a telescopic boom having at least a tip thereof positioned below an eyepoint in the driver's cab in a most inclined traveling posture supported pivotably on the swivel base. Intended for visual recognition devices.

  The traveling forward viewing device of the wheel crane is located at the top surface of the telescopic boom that is visible from the eye point of the driver's cab, and at least a part of the reflecting surface in plan view is on the side opposite to the driver's cab of the telescopic boom. A convex mirror is attached so as to be located outside the side surface, and the front of the wheel crane can be visually recognized from the eye point of the driver's cab by an indirect field of view through the convex mirror when the wheel crane is traveling.

  In the forward traveling visibility device for a wheel crane described in claim 1 of the present application, the convex mirror is attached to the upper surface position of the telescopic boom that is visible from the eye point of the cab. A subject in front of the wheel crane can be visually recognized.

  In addition, since the convex mirror is mounted such that at least a part of the reflecting surface thereof is located outside the side surface of the telescopic boom on the opposite side of the operator's cab in plan view, the view is directly blocked from the operator's cab by the telescopic boom. The forward indirect field of view of the telescopic boom on the opposite side of the cab can be viewed. Furthermore, since the visual mirror 10 disposed at the telescopic boom tip 5a or the traveling vehicle body left front part is always shown in the indirect field of view through the convex mirror, the relative position with respect to the subject can be easily grasped. Can do.

  In particular, in the present invention, since an inexpensive convex mirror is used without using an expensive TV camera and monitor, an inexpensive traveling front visual recognition device as a whole can be provided.

  FIG. 1 shows a wheel crane 1 according to the best mode for carrying out the present invention. FIG. 2 is a plan view of the wheel crane 1.

  The wheel crane 1 has a swivel 3 mounted on a traveling vehicle body 2 so as to be able to swivel, and a cab 4 for traveling operation and crane operation is disposed on one side of the swivel 3. Further, the telescopic boom 5 is pivotally supported by the swivel 3 so that the telescopic boom 5 is at least at the tip of the telescopic boom 5a at the eye point 7 (the wheel in the driver's cab 4) in the most inclined traveling posture. (It means the viewpoint position of the occupant 6 who travels the crane 1).

  A visual recognition device 8 is attached to the upper surface position of the telescopic boom 5 visible from the eye point 7 in the cab. Since the glass window 9 is provided on the surface of the driver's cab 4 on the side of the telescopic boom 5, the visual recognition device 8 disposed at the upper surface position of the telescopic boom 5 from the eye point 7 in the driver's cab through the glass window 9. Is visible. In addition, the position in the longitudinal direction on the upper surface of the telescopic boom 5 to which the visual recognition device 8 is attached may be anywhere as long as it is visible from the eye point 7.

  3A is a detailed view of the visual recognition device 8 shown in FIG. 1, and FIG. 3B is a detailed view of the visual recognition device 8 shown in FIG.

  The visual recognition device 8 includes a convex mirror 12 and a support 13 that holds the convex mirror 12 on the upper part of the telescopic boom 5. The support 13 is attached to the upper surface of the base boom of the telescopic boom 5 with a bolt 14. In the visual recognition device of the present invention, since the convex mirror is attached to the base boom, it is not necessary to use an expensive scattering prevention mirror as in the case of attaching to the boom head of the top boom. It can be a device.

  As shown in FIG. 3B, the reflecting surface 12a of the convex mirror 12 is attached so that a part thereof is located outside the side surface 5b on the opposite side of the operator's cab of the telescopic boom in plan view. As shown in FIG. 2, the reflecting surface 12a is arranged so as to face the eye point 7 side of the cab and also face the telescopic boom tip 5a side.

  A hatched portion A shown in FIGS. 1 and 2 indicates an indirect field of view through the convex mirror 12 from the eye point 7 of the cab. While the wheel crane 1 is traveling, the eye point 7 looks forward through the windshield 11 of the normal cab, but if necessary, even if the line of sight changes from the eye point 7 to the convex mirror 12, the angle of the line of sight Since the change is small, the subject in front of the wheel crane in the indirect field of view can be easily seen.

  Further, as can be seen from the fact that the oblique mirror portion A indicating the indirect field of view includes the telescopic boom tip 5a or the visual mirror 10 disposed at the left front portion of the traveling vehicle body, the convex mirror always includes the telescopic boom tip 5a or Since the viewing mirror 10 disposed at the left front portion of the traveling vehicle body is shown, the relative position with respect to the subject can be easily grasped.

It is a figure showing wheel crane 1 concerning the best form for carrying out the present invention. It is a top view of the wheel crane 1 of FIG. It is detail drawing of the visual recognition apparatus 8 shown in FIG. 1 and FIG.

Explanation of symbols

1: wheel crane 2: traveling vehicle body 3: swivel platform 4: cab 5: telescopic boom 7: eye point 8: visual device 12: convex mirror 12a: reflecting surface A: indirect field of view

Claims (1)

A swivel mounted on a traveling vehicle body so as to be able to swivel, a driving cab arranged on one side of the swivel and a crane operating cab, and a traveling posture that is pivotally supported by the swivel so that it can be raised and lowered. Then, at least the tip of the telescopic boom located below the eye point in the cab, and a forward traveling visual recognition device for a wheel crane,
A convex mirror is attached to the upper surface position of the telescopic boom visible from the eye point of the operator's cab so that at least a part of the reflecting surface thereof is located outside the side surface of the telescopic boom opposite to the operator's cab in plan view. An apparatus for visually confirming a forward movement of a wheel crane, wherein the front of the wheel crane can be visually recognized from an eye point of the operator cab through an indirect field of view through the convex mirror during traveling of the crane.

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