JP3038850U - 3-wheel carrier - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To reliably rotate three wheels so that the entire stairs can be smoothly climbed and descended. In addition, small wheels will be used to reduce the weight and cost of the entire carrier. SOLUTION: A wheel support 2 is rotatably attached to a left and right lower end portions of a carrier body 1 having a handle 1a on the upper side and a loading platform 1b formed on the lower end portion at a substantially right angle.
The wheel support 2 is provided with three support arms 3, 4 and 5 in a radial pattern.
Wheels 10, 11 and 12 are rotatably supported by bearings 8 and 9. The tip ends of the support arms 3, 4, 5 are bent at a required angle in a V shape along the rotation direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a three-wheel type carrier in which a wheel group having a set of three wheels is rotatably attached to the lower left and right ends of a carrier body having a handle and a loading platform.

[0002]

[Prior art]

 A three-wheel carrier is a suitable carrier for climbing and descending stairs. The three-wheel carrier has a wheel-shaped carrier having an upper side as a handle and three support arms radially provided on the left and right lower ends of a gate-shaped carrier body having a loading platform formed at a substantially right angle at the lower end. The wheels are rotatably rotatably attached, and the wheels are rotatably rotatably attached to the tips of the respective support arms of the wheel support.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned conventional three-wheel type carrier has the following problems. It is because each support arm of the wheel support is straight, so that the wheel support does not rotate when descending stairs, and originally three wheels should rotate sequentially in each step. The point is that it will not rotate.

This point will be described with reference to FIG. T is a staircase, 101 is a wheel support, 102 is an axis of the wheel support, 103, 104 and 105 are support arms radially provided on the wheel support 101, 106, 107 and 108 are the support arms 103, The wheels 104, 105, and 111 are rotatably attached to shafts 109, 110, and 111, respectively. Further, the support arms 106, 107, 108 are linear.

In this case, when the carrier moves toward the lower stage and the front wheel 108 descends from the upper stage to the lower stage and comes into contact, that is, the state shown by the solid line. At this time, the shaft 111 of the wheel 108 is slightly ahead of the shaft 102 of the wheel support 101, which is the center of gravity, in the traveling direction. For this reason, the wheel 108 may roll and shift to the front side in the traveling direction as indicated by the arrow. This state is extremely unstable, and sometimes the wheel support 101 rotates in the opposite direction, and the rear wheel 106 may drop vigorously to the lower stage. It is not possible to get off the stairs smoothly.

Further, in order to solve this problem, it is possible to replace the wheel with a large diameter wheel as shown in FIG. That is, if the diameter of each wheel 106 ', 107', 108 'is increased, the position of the shaft 111' of the wheel 108 'becomes lower than that of the shaft 102' of the wheel support 101 'when the wheel 108' descends to the corresponding step. Can also be moved backward in the direction of travel. However, the weight of the entire carrier becomes heavy due to the large diameter of the wheel. Also, the cost is high. The configuration shown in FIG. 4 is the same as that of FIG. 3 except for the points of wheels, and therefore detailed description will be omitted.

The present invention has been made in view of the above points, and the three wheels are surely rotated so as to descend to the lower stage in order or to rise to the upper stage, thereby smoothing the entire stairs. The purpose of the present invention is to provide a three-wheel type carrier that is capable of ascending and descending and using the smallest possible wheels to reduce the overall weight and cost.

[0008]

[Means for Solving the Problems]

 Thus, the gist of the present invention is that a wheel support having three support arms radially provided on the lower left and right ends of a carrier main body having a handle and a loading platform is rotatably attached to the wheel support. In a three-wheel type carrier in which wheels are rotatably attached to the tips of the respective support arms of the body, the tips of the support arms are bent in a V shape along the rotational direction at a required angle. It is in a three-wheel type carrier characterized by that.

[0009]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the present invention, and FIG. 2 is an operation explanatory view.

In the figure, reference numeral 1 denotes a gate-shaped carrier body having an upper side with a handle 1a. A carrier 1b is formed on the lower end of the carrier body 1 at a substantially right angle.

Reference numeral 2 is a wheel support body provided with three support arms 3, 4, and 5 radially. The wheel support 2 is rotatably attached to the lower left and right ends of the carrier body 1 by means of a shaft 6. Further, wheels 10, 11, and 12 are rotatably attached to the tip ends of the support arms 3, 4, and 5 with shafts 7, 8, and 9 rotatably.

The above structure is similar to that of the conventional three-wheel type carrier. The feature of the present invention is that the tip ends of the support arms 3, 4, and 5 are bent at a required angle in a V shape along the rotation direction. That is, in the embodiment shown in FIG. 2, the tips of the supporting arms 3, 4, 5 are bent along the rotation direction by an angle θ (130 °).

In FIG. 2, the angle θ ′ between the support arms 3, 4, and 5 is 120 °, and the length L ₁ from the base to the bent portion of each of the support arms 3, 4, and 5 is L _1. Is 85 mm, and the length L ₂ from the bent portion to the tip is 50 mm. The wheels 10, 11 and 12 axially attached to the support arms 3, 4 and 5 have a diameter of 100 mm.

According to the above configuration, when the carrier moves toward the lower step and the front wheel 10 passes through the position shown by the solid line on the way from the upper step to the lower step, the center of gravity is reached. The shaft 7 of the wheel 10 is located rearward of the shaft 6 of the wheel support body 2 in the traveling direction. Therefore, the wheel 10 rolls to the rear side in the traveling direction as indicated by the arrow. As a result, the wheel support 2 reliably rotates in the traveling direction, and the next wheel 11 descends to the same stage as the wheel 10 described above. By repeating this, it can rise smoothly in the same way.

[0015]

EFFECTS OF THE INVENTION Since the present invention has the structure and operation as described above, it is possible to surely rotate the three wheels so that the wheels descend in sequence to the lower stage. On the other hand, when climbing the stairs, the three wheels also rotate reliably. Therefore, it is possible to smoothly climb up and down the entire staircase with the luggage loaded. Also, since small wheels can be used, it is possible to reduce the weight and cost of the entire carrier.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the present invention.

FIG. 3 is a diagram illustrating the operation of a conventional product.

FIG. 4 is an operation explanatory view of a conventional product different from the conventional product shown in FIG.

[Explanation of symbols]

 1 Carrier Main Body 1a Handle 1b Loading Platform 2 Wheel Supports 3, 4, 5 Support Arms 6 Wheel Support Shafts 7, 8, 9 Wheel Shafts 10, 11, 12 Wheels

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Osamu Hata 3-25 Higashigokencho, Shinjuku-ku, Tokyo Inside Nippon Health Industry Co., Ltd. (72) Inventor Ikuo Tsubono 3 Higashigoken-cho, Shinjuku-ku, Tokyo No. 25 within Japan Health Industry Co., Ltd.

Claims (1)

[Utility model registration claims] 1. A wheel support body having three support arms radially provided rotatably and axially attached to the lower left and right ends of a carrier body having a handle and a loading platform, and the tips of the respective support arms of the wheel support body. In a three-wheel type carrier in which a wheel is rotatably attached to a portion, each tip end of the support arm is bent in a V shape along a rotation direction at a required angle.
Wheel type carrier.