JPH05310153A - Auxiliary wheel of cart - Google Patents

Abstract

PURPOSE:To pull a vehicle body over even in a longitudinally narrow space by installing an auxiliary wheel which rolls perpendicularly to the direction of advance of the vehicle body while permitting the auxiliary wheel to be stored in the vicinity of a running wheel, and setting the ground plane of the auxiliary wheel lower than the tread of a crawler. CONSTITUTION:A horizontal shaft 36 is suspended over a frame 34 or the like interposed between a running wheel 16 and a driving wheel 20 and a mounting plate 38 to which an auxiliary wheel 32 is attached is rotatably fitted with the horizontal shaft 36. When the auxiliary wheel 32 is rotated downward and put in an operating position, its ground plane is set to be lower than the ground plane of a crawler 22. Such an auxiliary wheel 32 may be provided in the vicinity of a forward idling wheel 18. A handle 44 provided at the rear is pushed sideward to move the vehicle body sideward. In that case, when the rear auxiliary wheel 32 is used, the front auxiliary wheel 32 is kept in a storage position and the rear auxiliary wheel 32 and the front idling wheel 18 are alternately grounded for crawling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary wheel for a carrier.

[0002]

2. Description of the Related Art There is known a transporting vehicle having a luggage carrier frame that can be changed between an upright posture and a tilted posture, a traveling wheel in the center, and idle wheels and drive wheels in front of and behind them, and a crawler wound around them. Since the structure of this type of vehicle is such that loading and unloading of luggage is labor-saving, and that it is possible to enter narrow alleys and climb stairs, it is useful for carrying heavy items to be delivered individually. ing.

[0003]

By the way, such a carrier is loaded on a truck or the like to a local relay point and carried along with luggage, but when the carrier is loaded on the truck,
It is necessary to make the width narrower in the narrow space before and after the loading platform. In such a case, conventionally, the vehicle body is lifted up and brought up. The present invention addresses such a problem and, in short, is designed to allow the vehicle body to be moved even in a narrow space in the front-rear space.

[0004]

Under the above-mentioned problems, the present invention has a luggage carrier frame that can be changed between an upright posture and an inclined posture, and has a traveling wheel in the center and idle wheels and drive wheels in the front and rear thereof. In a transport vehicle in which the crawlers are arranged around these wheels, auxiliary wheels that roll at a right angle to the vehicle traveling direction are installed so that they can be stored near the running wheels, and the ground contact surface of the auxiliary wheels is the tread surface of the crawler. Provided is an auxiliary wheel for a carrier characterized by being set lower than the above.

[0005]

By using the auxiliary wheel having the above-described structure, the vehicle body can be moved in a direction perpendicular to the traveling direction, and the vehicle can be moved to a width even in a narrow space.

[0006]

1 is a side view of a carrier, and FIG. 2 is a rear view of the carrier. In this carrier, a large-diameter running wheel 16 is provided near the center of gravity of a chassis 14 on which an engine 10, a transmission 12, etc. are mounted. ,
Further, an idle wheel 18 and a drive wheel 20 are arranged in front of and behind them, and a crawler 22 is wound around them. Drive wheel 2
0 is installed above the traveling wheel 16 so that a portion of the crawler 22 between the idler wheel 18 and the traveling wheel 16 serves as a grounding surface. The upper side of the crawler 22 is also received by the traveling wheel 16 at the center.

At the front part of the chassis 14, there is provided a carrier frame 24 which rotates in a vertical plane.
4 is rotated by the expansion and contraction of a hydraulic cylinder 26 provided between the vehicle body 14 and an upright posture, and an inclined posture lying on a tilted frame 28 installed on the chassis 14 in a forward and downward direction. As a result, the luggage frame 24 is placed in the upright posture, and the luggage 30 is loaded and transported in the safe inclined posture.

By the way, according to the present invention, in the above structure, the auxiliary wheel 32 which rolls at a right angle to the traveling direction of the vehicle body.
Is provided near the traveling wheel 16 so as to be stored. Figure 3
FIG. 3 is a side view showing the details of this, but a horizontal shaft 36 is installed over a frame 34 or the like that is interposed between the traveling wheels 16 and the drive wheels 20 that form the chassis 14.
It is conceivable that a mounting plate 38 having the auxiliary wheels 32 mounted thereon is rotatably fitted therein.

When the auxiliary wheel 32 is switched between the storage posture and the working posture, it must be fixed in that posture. Therefore, a bolt 40 is screwed on the side surface of the mounting plate 38, and the bolt 40 is formed on the frame 34 or the like. A method in which the guide plate (or the mounting hole) 42 is inserted and the guide plate 42 is tightened and fixed by the bolt 40 may be considered. Incidentally, the auxiliary wheel 32
When the is in the retracted position, it preferably fits within the crawler 22. Although not described in detail, it is also possible to perform this operation remotely.
Next, when the auxiliary wheel 32 is rotated downward into the working posture, the ground contact surface is set at least below the ground contact surface of the crawler 22. Two such auxiliary wheels 32 are preferably provided in terms of functionality and stability. In addition, such an auxiliary wheel 32 may be provided near the front idler wheel 18.

By providing the auxiliary wheels 32 as described above, when the vehicle body is attempted to be moved closer to the vehicle, if the auxiliary wheels 32 are placed in the working posture and the rear handle 44 is pushed laterally,
The car body easily moves sideways. At this time, the rear auxiliary wheel 32
If it is used, the front auxiliary wheel 32 is kept in the retracted posture, and the rear auxiliary wheel 32 and the front idler wheel 18 are not grounded alternately (the front auxiliary wheel 32 is The same when using).

FIG. 4 shows a traveling wheel 1 showing another embodiment of the present invention.
6 is a side view of the portion 6 and FIG. 5 is a cross-sectional view.
The crawlers 22 as well as the drive wheels 20 can be applied to the traveling wheels 16 that do not need to exert driving force (in this case, the idler wheels 18)
The pins 48 are laterally provided at a pitch that matches the pitch of the driving irregularities 46 formed on the inner circumference. This allows
The crawler 22 becomes difficult to come off, and deformation is suppressed, which has the effect of extending the life.

FIG. 6 is a cross-sectional view of a crawler 22 showing still another embodiment of the present invention. In this embodiment, the convex portion 46a of the unevenness 46 is bulged outward from the neck to the concave portion 5 there.
0 is formed, and the crawler retainer 52 has a convex portion 46.
A wing portion 54 that covers a and a protruding portion 56 that enters the recessed portion 50 are formed, and the head of the convex portion 46 is sandwiched between the wing portion 54 and the protruding portion 56 from above and below. By doing so, the crawler 22 becomes more difficult to come off, and the tension of the crawler 22 can be relaxed.

[0013]

As described above, according to the present invention, since the vehicle body can be easily width-shifted even when the loading space of the truck or the like is full, the width-shifting work can be performed. It is labor-saving and quick.
In addition, since the auxiliary wheels can be used to shift the width even during normal traveling, maneuverability is excellent. In particular, this type of transport vehicle runs on narrow alleys and stairs, so this function has great significance.

[Brief description of drawings]

FIG. 1 is a side view of a carrier.

FIG. 2 is a partial rear view of the carrier.

FIG. 3 is a side view of a main part of an auxiliary wheel.

FIG. 4 is a side view of a traveling wheel.

FIG. 5 is a sectional view of traveling wheels.

FIG. 6 is a sectional view of a crawler.

[Explanation of symbols]

 16 traveling wheels 18 idler wheels 20 drive wheels 22 crawlers 24 carrier frame 32 auxiliary wheels

Front page continuation (72) Inventor Fuyuki Morishita, 428 Enami, Okayama, Okayama Prefecture, Seirei Industry Co., Ltd. (72) Inori, Hisanori Sato, 428, Enami, Okayama City, Okayama, Seirei Industry Co., Ltd.

Claims (2)

[Claims] 1. A transport vehicle having a luggage carrier frame that can be changed between an upright posture and a tilted posture, a traveling wheel in the center, and idle wheels and drive wheels in front and rear thereof, and a crawler wound around them. An auxiliary wheel that rolls at a right angle to the vehicle body traveling direction is installed near the running wheels so that it can be stored, and the ground contact surface of the auxiliary wheel is set below the tread of the crawler. Auxiliary wheel. 2. An auxiliary wheel for a transport vehicle, wherein the auxiliary wheel according to claim 1 is provided near the idler wheel.