JPH0569079U - Detachable post type aerial work vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] In a detachable post-type aerial work vehicle, it is possible to securely hold the lifting post with respect to the bogie, and further to prevent rattling of the lifting post with respect to the bogie. [Structure] The detachable post-type aerial work vehicle 10 is a dolly 12
And a lifting post 13 that is detachably mounted on the dolly 12 to move the working floor 15 up and down. A plurality of lock mechanisms 21 and 22 are provided between the dolly 12 and the lifting posts 13 for locking and holding the lifting posts 13 mounted on the dolly 12.
The lock holding methods of 1 and 22 are different from each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a detachable post type aerial work vehicle in which an elevating post for raising and lowering a work floor is detachable from a dolly.

[0002]

[Prior Art]

 For indoor aerial work, a self-propelled trolley is equipped with a vertical lifting post, and the lifting post is telescopically expanded and contracted to raise and lower the work floor. Aerial work vehicles are often used. Workers on the work floor can move to any height by traveling the dolly and raising and lowering the work floor. In such aerial work vehicles, detachable post-type aerial work vehicles are conventionally used in which the lifting posts can be removed from the dolly after work and can be stored in a narrow space. A lock mechanism is provided between the bogie of this detachable post type aerial work vehicle and the elevating post to hold the elevating post so that it does not come off the bogie when it is installed.

[0003]

[Problems to be solved by the device]

 However, conventionally, only one type of locking mechanism is provided, and there is a risk that the locked state will be released naturally due to vibration during work. In addition, there is also a problem that it is often impossible to prevent the lifting post from rattling with respect to the bogie with one type of locking mechanism.

The present invention has been made in view of the above problems, and it is possible to reliably hold the lifting post with respect to the carriage by lock, and further to prevent rattling of the lifting post with respect to the carriage. The purpose is to provide a detachable post-type aerial work vehicle that has been modified.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, a plurality of lock mechanisms having different lock holding methods are provided between the truck and the lifting post of the detachable post type aerial work vehicle of the present invention.

[0006]

[Action]

 Such a detachable post-type aerial work vehicle is provided with a plurality of types of lock mechanisms having different lock holding methods, and therefore, for example, one type of lock mechanism is disengaged by vibration in a certain direction during work. However, the other locking mechanism does not come off, and the ascending / descending post is surely held vertically. Further, by holding the lock at a plurality of positions, it is possible to prevent the lifting post from rattling with respect to the carriage.

[0007]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a detachable post type aerial work vehicle according to the present invention. The aerial work vehicle 10 includes a carriage 12 that is driven and driven by an electric motor 11, and an elevating post 13 that is vertically mounted on the carriage 12. The elevating post 13 is configured in a telescope shape from an inner post 13a directly attached to the dolly 12 and an outer post 13b extensiblely attached to the inner post 13a. The expansion / contraction operation of the inner post 13a with respect to the outer post 13b is performed by winding and unwinding a wire (not shown) wound around these inside by a winch 14 attached to the lower portion of the inner post 13a. Done. A work floor 15 is horizontally attached to the lower end of the outer post 13b, and the work floor 15 can be moved up and down by the outer post 13b extending and contracting with respect to the inner post 13a. Therefore, the worker M who is on the work floor 15 can move to an arbitrary high place through the traveling of the carriage 12 and the raising and lowering of the work floor 15.

By the way, the elevating post 13 can be detached from the dolly 12 for convenience of storing the aerial work vehicle 10 after the work. Therefore, a forked portion 13c that opens downward is formed on the side surface of the lower end portion of the inner post 13a. By engaging and disengaging the forked portion 13c with the lower frame 12a of the carriage 12, Therefore, it is possible to easily attach and detach the carriage 12. However, since the lifting post 13 is unstable only by the engagement between the forked portion 13c and the lower frame 12a, as shown in FIG. A lock mechanism 21 and a second lock mechanism 22) are provided.

The first lock mechanism 21 includes a trolley-side lock plate 21 a formed so as to extend horizontally forward from a front end portion of the trolley 12, and a horizontal side surface on a lower side surface of the inner post 13 a in the elevating post 13. The post-side lock plate 21b is formed so as to extend, and the lock key 21c is formed in a rod shape and has a grip portion having a diameter larger than that of the rod portion on the upper portion thereof. As shown in FIG. 3, the lock plates 21a and 21b engage the bifurcated portion 13c of the inner post 13a with the lower frame 12a in a state in which the elevating post 13 is tilted slightly forward, and then vertically elevate the elevating post 13. By making it stand upright, it will overlap vertically. The lock plates 21a and 21b are formed with through holes (not shown) whose positions coincide with each other when the lock plates 21a and 21b are vertically overlapped with each other, as shown in FIG. The rod-shaped portion of the lock key 21c is inserted, and the grip portion prevents the lock key 21c from falling off. By the first lock mechanism 21, the elevating post 13 is held substantially vertically although it has a play due to the dimensional difference between the lock key 21c and the through holes of the lock plates 21a and 21b.

On the other hand, the second lock mechanism 22 includes a vertical lock plate 22 a formed to extend laterally vertically to a rear end portion of a lower side surface of the inner post 13 a and a vertical rocking motion at a front end portion of the carriage 12. It is composed of a lock lever 22b freely attached. The vertical lock plate 22a comes into contact with the front end surface of the carriage 12 when the elevating post 13 is vertically raised. The swing center of the lock lever 22b is provided close to the side of the vertical lock plate 22a that abuts on the front end surface of the dolly 12, and the swing operation of the lock lever 22b from the standing state to the sideways lying state is performed. As a result, the vertical lock plate 22a can be held between the lock lever 22b and the front end surface of the carriage 12. A lever receiver 22d is provided on the front surface of the vertical lock plate 22a for holding the lock lever 22b in the state of being laid sideways. The second locking mechanism 22 holds the lifting post 13 vertically, and the mutual holding action with the first locking mechanism 21 prevents rattling of the lifting post 13 that could not be prevented by the first locking mechanism 21 alone. Can be suppressed.

By thus providing the two lock mechanisms 21 and 22 having different lock holding methods from each other, for example, the first lock key 21c pops out upward due to vertical vibration of the truck 12 while the truck 12 is traveling. Even when it is disengaged, the second lock mechanism 22 maintains the locked state, and reliably holds the elevating post 13 vertically. Therefore, the completeness of the work is ensured.

In the above embodiment, the two types of lock mechanisms 21 and 22 are provided only on the left side of the elevating post 13, but two types of lock mechanisms may be provided on the right side as well.

[0013]

[Effect of the device]

 As described above, the detachable post-type aerial work vehicle of the present invention is provided with a plurality of lock mechanisms each having a different lock holding method, and therefore, even if one lock mechanism is released, the other lock mechanisms are The lock mechanism will not be disengaged for the same reason that it was disengaged. Therefore, the other lifting mechanism holds the lifting post vertically, so that the work can be performed safely. In addition, by providing two types of lock mechanisms in this way, it is possible to prevent rattling of the bogie of the lifting post, which is often not possible to suppress with one type of lock mechanism, so that workers on the work floor can be prevented. , Can work in a stable state.

[Brief description of drawings]

FIG. 1 is a side view of a detachable post type aerial work vehicle according to the present invention.

FIG. 2 is a perspective view of a lock mechanism provided in the removable post-type aerial work vehicle.

FIG. 3 is a side view showing how the lifting posts are attached and detached in the detachable post type aerial work vehicle.

[Explanation of symbols]

 10 Detachable Post Model Aerial Work Vehicle 12 Cart 12a Lower Frame 13 Lifting Post 13c Bifurcated Part 15 Work Floor 21,22 Lock Mechanism

Claims (1)

[Scope of utility model registration request] 1. An attachable / detachable post type aerial work vehicle comprising a dolly and an elevation post that is detachably attached to the dolly and moves up and down the work floor. A detachable post-type aerial work vehicle, characterized in that a plurality of lock mechanisms for locking and holding the lifting post mounted on the trolley are provided, and the lock holding methods in the respective lock mechanisms are different from each other. ..