JP3036357U - Wheelbarrow - Google Patents

Abstract

(57) [Abstract] [Problem] A wheelbarrow (or wheelbarrow) cannot pull up and down a stepped portion such as a stair. Therefore, in the current situation, a person is lifting up and down the stairs together with the guided vehicle on the stairs, which is a heavy burden. SOLUTION: On the back surface of the puller frame rod and the luggage carrier frame rod,
It is a guide car equipped with 2 articles of caterpillar, so that this caterpillar can be passed over multiple stairs of stairs,
It is assumed that the caterpillar can be raised and lowered smoothly by rotating it.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a guide or wheelbarrow (hereinafter, referred to as a wheelbarrow) that is frequently used in a department store, a station building, or a general city.

[0002]

[Prior art]

 In the main body of the tow truck, the towing frame rod and the loading frame frame rod intersect at a substantially right angle (L type), and a pair of wheels are rotatably attached near the intersection, and the loading frame frame rod is further attached. It is a very simple dolly with a structure in which legs for stands are formed on the back surface of the front end of the. Even if a heavy object is loaded on the platform, it is lightweight because it rolls the wheels for transportation, and when stopped, the stand legs are in contact with the ground so that they stand upright. It is useful to carry on a trip.

[0003]

[Problems to be solved by the device]

 However, it is difficult to go up and down stairs that exist everywhere with such a pair of wheels. When moving a large trunk loaded in this guide vehicle, the stairs must be lifted up and down with the weight of the trunk and the guide vehicle held together. In addition, it is often found that there is a wide space between the platform and the train on the platform inside the train station, but even in this case, it is very dangerous and it is customary to carry it by hand. The challenge is to develop a towing vehicle that can be easily towed or pushed along such a stepped road.

[0004]

[Means for Solving the Problems]

 SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is directed to a wheeled vehicle having a pair of wheels, in which one or several tracks that are auxiliary to the wheels are pulled and the wheels run on the back surfaces of the hand frame rod and the carrier frame rod. It is mounted so that it can rotate in any direction. A wheelbarrow with such a configuration will load the luggage onto the bed and pull (or push) on the level ground to rotate only the wheels on the ground, thus moving forward slightly, and also on the stairs. When moving up and down, a part of the caterpillar abuts on the stairs of the stairs, and when the tug is pulled up, the car body rises, and at the same time, the caterpillar turns and the tip of the caterpillar abuts the nose of the next stairs. Therefore, the hand truck is supported by the nose of two or three steps, and the caterpillar can be rotated smoothly with almost no resistance by rotating the caterpillar. In addition, even if there is a gap between the platform and the train when boarding a train, etc., the front end of the caterpillar on the puller side should be tilted almost parallel to the home, or the caterpillar attached to the loading platform should be placed between the platform and the train entrance / exit. By pulling, this towing vehicle can be used without dropping.

[0005]

[Embodiment of the invention]

 In the tow truck of the present invention, the loading frame frame rod is attached to the end of the pulling frame frame rod at an angle of approximately 90 ° (L type), and is located outside the intersection of the pulling frame frame rod and the loading frame frame rod. A pair of wheels are rotatably supported toward each other, which is the same as a normal wheelbarrow. In addition to this, one or a plurality of strips of caterpillars are provided on the back surfaces of the puller frame rod and the luggage carrier frame rod, respectively, in a direction parallel to the direction in which the wheel is moving and attached to those frame rods. The angle is variable (may be unchanged).

[0006]

[Action]

 In the case of moving on a level ground, the wheel guide with the above caterpillar is towed like a normal wheel guide with only the wheels touching the ground and turning, but when moving up the stairs, it is attached to the back of the pull frame. The caterpillar straddles multiple noses at the same time, and the caterpillar mounted under the loading frame rod also straddles multiple noses at the same time when descending the stairs. The nose of the car progresses as one slope and goes up or down.

[0007]

【Example】

 An embodiment of a guide vehicle according to the present invention will be described with reference to the drawings. The tow truck 1 has a loading frame frame rod 3 attached to the end of the pulling frame rod 2 at a substantially right angle, and appropriate frames 2a and 3a are stretched over these frame rods to prevent the falling of luggage. A pair of wheels 4 are rotatably supported axially 4a outward from an intersection 3b between the puller frame rod 2 and the luggage carrier frame rod 3. In addition to this, one or a plurality of tracks 5 and 6 are provided on the back surfaces of the puller frame rod 2 and the luggage carrier frame rod 3, respectively, in parallel with the wheel 4 and with the side close to the wheel as a fulcrum 2c. It is attached so that the mounting angle with respect to the frame rods 2 and 3 can be changed (or fixed).

As shown in FIGS. 2 and 3, the caterpillar 5 has a bearing plate 5a on which two or more V pulleys 5b, 5b, ... It is a suspension. Further, FIG. 3 shows an example in which a tensioning device 5d for obtaining appropriate tension of the V-belt 5c is attached. This tensioning device 5d rotates its nut 5n to move the pulley at one end, Adjusts the belt tension, but is not required. The caterpillar 5 has one end close to the wheel 4 rotatably supported on the back surface of the pulling frame 2 and the other end for changing the attachment interval with the pulling frame 2, for example, an angle-adjustable hinge. It is attached via the 7a-shaped portion, and the angle with the puller frame rod can be adjusted by operating the lever 7. In the caterpillar 5 of FIG. 3, pulleys 5e and 5e are mounted between the V pulleys 5b and 5b in contact with the inner surface of the belt on the ground side. This pulley 5e is for preventing the belt from being bent due to the contact of the nose when the stairs are moved up and down, which enables smooth ascent and descent. In FIG. 3, the distance between the pulleys 5b and 5b and the pulley 5e is drawn wide. However, it is desirable to keep the distance as small as possible, and it is unnecessary to make the distance between the V pulleys 5b and 5b narrow. Is also possible.

The structure of the caterpillar 6 mounted on the back surface of the carrier frame rod is the same as that of the caterpillar 5 described above. Several pulleys 6a, 6a are rotatably attached on a bearing plate (not shown). A V-belt 6b is stretched around the two belts, and two strips are attached in the same direction as the direction in which the wheels 4 rotate. Although it is shown in the drawing as being fixed in parallel to the frame frame rod, the side close to the wheel 4 is rotatable like the track 5 and the other end is the frame rod 3 It may be possible to adjust the angle by changing the mounting distance between and. Further, although a pulley provided between the V-belt tensioning device (comparable to 5d described above) and the pulleys 6a, 6a is not shown, by attaching them in the same manner as described above, the handrail 1 can be moved up and down the stairs. It's smoother, but it doesn't hinder usage without it.

A method of using the hand guided vehicle of the present invention having the above structure will be described. First, when moving up and down the stairs, as shown in FIG. 4, the lever 7 is operated to increase the angle of the hinge portion 7a so that the caterpillar 5 which is substantially parallel to the pulling frame rod 2 is removed from the pulling frame rod. Separated, the surface of the caterpillar 5 is brought into contact with the stairs 2 to 3 of the stairs shown by the phantom line in FIG. If the hand truck 1 is pulled up or pushed down in this state, the nose can travel with a feel like a slope. When pulling down the stairs, the same traveling as described above can be performed by bringing the caterpillar 6 mounted on the back surface of the loading frame frame rod 3 into contact with the nose of the stairs shown by the dotted line in FIG.

When the manual guided vehicle is used in a place where there is a large gap between the platform of the train and the entrance / exit to / from the vehicle, as shown in FIG. 5, by operating the lever 7, the caterpillar 5 and the pull frame are operated. If the angle between the rod 2 is made larger and the tip of the caterpillar 5 and the wheel 4 are bridged so as to straddle the vehicle and the platform and pulled toward the front, the hand truck can travel without dropping into the gap. .

The wheelbarrow according to the present invention is characterized by having a caterpillar attached, and the caterpillar has been described as using a pulley and a V-belt. A flat belt or a combination of a timing wheel and a timing belt is good, and sprockets can also be used.

Although not shown in the drawing, it is common to pivot an upright stand on the tip of the loading frame rod, and it is customary to attach the stand to the tow truck as well. It is possible to replace the stand with a brake attached to the track 6 or the wheels 4 to restrict free rotation.

[0014]

[Effect of the invention]

 Conventional wheelbarrows are used not only for daily shopping but also for travel, and therefore have heavy trunks, etc., but no consideration is given to climbing stairs. There was no choice but to lift up the guide car and climb the stairs, but in the guide car of the present invention, by installing a caterpillar, the caterpillar can also be used as a slope to connect a plurality of stairs in a straight line as a slope. As a result, it is possible to move up and down in a lighter weight than the conventional hand guided vehicle.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hand cart of the present invention.

FIG. 2 is a front view showing an example of the structure of a caterpillar in a sectional view.

FIG. 3 is a side view showing an example of the structure of a caterpillar.

FIG. 4 is a side view showing a method of ascending / descending stairs of the guided vehicle of the present invention.

FIG. 5 is a side view showing a method of crossing a gap such as a groove.

[Explanation of symbols]

 1 Towing vehicle 2 Puller frame rod 3 Loading platform frame rod 4 Wheels 5 Track 6 Tracks 7 Lever

Claims (3)

[Utility model registration claims] 1. A handrail or a wheelbarrow, in addition to a pair of wheels projecting close to an L-shaped intersection of the puller frame rod and the luggage carrier frame rod, the puller frame rod and the luggage carrier frame rod are provided on the back surface thereof. A guide or wheelbarrow characterized in that one or two tracks of the track are mounted such that the mounting angle with respect to the frame rod is variable or invariable, and is close to the wheel and parallel to the traveling direction thereof. 2. A guide in which, in addition to a pair of wheels projecting close to the intersection of the puller frame rod and the luggage carrier frame rod, one or two tracks are attached to the puller side and the backside of the luggage carrier frame rod. Alternatively, in the handcart, the caterpillar is a combination of a V-belt, a flat belt or a timing belt and a plurality of pulleys corresponding to the V-belt, the flat belt or the timing belt. 3. A pulley having a small diameter is mounted between each of the plurality of pulleys around which the belt is stretched and in contact with the inner surface of the belt on the grounding side to reduce deflection of the belt due to grounding. The guide or wheelbarrow according to claim 2, which is characterized in that.