JPH0554092U - Boarding ladder for mobile cranes - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention makes it easy to get on and off a crane truck.
It is an object of the present invention to provide a boarding / unloading ladder that enables safe boarding / alighting and does not increase the width of the vehicle. [Structure] A ladder is provided that is stored on the front of the fan and rotates to the outside of the front of the fan when used.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a loading and unloading ladder for a crane vehicle provided to get on and off a crane vehicle.

[0002]

[Prior Art]

 In the case of large crane vehicles, the height from the ground to the floor of the driver's cab is usually 1500 m / m to 1700 m / m, so fixed ladders are known for getting on and off (see Fig. 7). ).

[0003]

[Problems to be solved by the device]

 However, even large-sized mobile cranes travel on ordinary roads, so the width of the vehicle is kept large in order to ensure its passage. Therefore, for example, as shown in FIG. 7, the width including the operation room C2 of the crane is almost equal to the vehicle width of the rear fender portion F of the chassis, and when a worker rides in the operation room C2, the operator's cab C1 From now on, they will be able to walk sideways while grasping the outer edge of the fender in the operation room, and be careful in moving the safety aspect.

An object of the present invention is to provide a loading and unloading ladder for a crane vehicle, which allows easy and safe loading and unloading of the crane vehicle and does not increase the width of the vehicle.

[0005]

[Means for Solving the Problems]

 According to the present invention, in a loading and unloading ladder for a crane vehicle provided to get on and off a crane vehicle, a stopper plate fixed to the fender, a landing section rotatably provided between the stopper plate and the fender, A ladder section pivotally attached to the landing section is provided, a stopper for controlling the angle at which the ladder section pivots, and a detection means for detecting the storage of the ladder.

A lock pin is preferably provided in the above-mentioned landing place.

[0007]

[Explanation of effects]

 In the loading and unloading ladder for a mobile crane constructed as described above, when getting in and out of the operation room to operate the crane, the ladder with the ladder provided on the stopper plate is rotated 90 degrees to move the ladder into the fender. If you put it on the outside of the building, fix it with a lock pin, pivot the ladder that is pivotally attached to the landing downward, and fix it with a stopper, you can use the ladder from the ground to get on and off the operation room directly. it can. If the ladder is stored in the upper part of the fender in the reverse order of the above, it will not be an obstacle when running. Since the storage detection means notifies that the ladder has not been stored, there is no worry of running with the ladder out.

[0008]

【Example】

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

In the drawings, the same reference numerals are given to the same corresponding members, and the description thereof will be omitted.

In FIGS. 1 and 2, a stopper plate 2 is fixed to the fender 1, and a landing 3 is mounted between the stopper plate 2 and the fender 1 by a rotating shaft 4 so as to be rotatable. In addition, the dance hall 3 is provided with holes 6 and 7 for inserting the lock pins 5, and the fender 1 has a hole 8 (see FIG. 7) so as to match the hole 6 when the dance hall 3 is in the retracted state. 3) is provided. Note that, also referring to FIG. 3, the hole 7 of the dance hall 3 is provided so as to coincide with the hole 8 in a use state in which the dance hall is rotated outward. One end of a ladder 10 is pivotally attached to the landing 3 via a plurality of hinges 9, 9, and the other end is fixed by a clamp indicated by reference numeral 19. A stopper 11 is rotatably provided on the side surface of the ladder 10 with one end 11 a as a fulcrum, and the other end is locked to the side surface of the ladder 10. Further, a stopper 13 for stopping the ladder 10 shown in FIG. 6 at the storage position and a detection switch 21 for turning on the storage position shown in FIG. 6 are provided on the upper surface of the feeder 1. They are connected by electric circuits 21a and 21b, respectively. Here, reference numeral 14 indicates a detection switch that is turned on at the neutral position of the transmission, and reference numeral 20 indicates a buzzer.

Reference numerals 15, 17 and 16, 18 indicate tires of mobile cranes, respectively.

Therefore, referring also to FIGS. 3 and 4, when getting on and off the operation room above the fender 1, first, the lock pin 5 is removed by removing the wing nut 5a, and then the clamp 19 of the ladder 10. After removing, the landing 3 and the ladder 10 are rotated by 90 degrees to align the hole 7 with the hole 8 and set the lock pin 5. Next, if one end of the stopper 11 provided on the ladder 10 pivoting downward as shown by the arrow A is locked to the stopper receiver 12 provided on the landing, the operator can easily get on and off the operating room (not shown). it can.

Further, when the ladder 10 is stored for traveling, it can be easily stored by the procedure reverse to the above. If the driver forgets to store the vehicle and tries to drive, the detection switch 21 for confirming the storage of the ladder 10 is turned off as shown in FIG. 5, and the detection switch 14 is turned off when the transmission is in a position other than neutral. Therefore, if the key switch K is turned on to start the engine and the transmission is shifted, the buzzer 20 sounds to warn the driver.

[0014]

[Effect of the device]

 Since the present invention is configured as described above, the operator can easily and safely get on and off the operation room, and the width of the vehicle does not become wide, so that the accessibility is impaired. Never. In addition, since it is equipped with a device that informs that it has not been stored, there is no danger of traveling with the ladder overhanging and it is safe.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention when a ladder is stored.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of the ladder shown in FIG. 1 when used.

FIG. 4 is a rear view of FIG.

FIG. 5 is an alarm circuit for alarming that ladders have not been stored.

FIG. 6 is a view showing a ladder storage stopper and a non-storage detection switch.

FIG. 7 is a diagram illustrating a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fender 2 ... Stopper plate 3 ... Dance place 4 ... Rotating shaft 5 ... Lock pin 9 ... Hinge 10 ... Ladder 11, 13 ... Stopper 15-18 ... ..Tire 19 ... Clamp 20 ... Buzzer 21 ... Detection switch

Claims (1)

[Scope of utility model registration request] 1. A loading and unloading ladder for a crane vehicle provided for getting on and off a crane vehicle, a stopper plate fixed to a fender, a dance hall provided rotatably between the stopper plate and the fender, and the dance hall. A loading and unloading ladder for a crane vehicle, which is provided with a ladder portion pivotally attached to the base, a stopper for restricting an angle at which the ladder portion pivots, and a detection means for detecting the storage of the ladder.