JP4664487B2 - Cart with anti-falling mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a carriage provided with a fall prevention mechanism, and more particularly to stable conveyance of a carriage having a rectangular platform with casters.
[0002]
[Prior art]
Conventionally, a hand cart with a rectangular platform is known. Casters are provided at the four corners of the platform, and an object placed on the platform is transported by gripping, pushing and pulling a handle erected on the platform.
[0003]
[Problems to be solved by the invention]
However, in the conventional carriage as described above, when trying to transport an object having a high center of gravity and a small bottom area, the placed object easily falls in the short side direction of the platform together with the carriage, and as a result There was the inconvenience that it was easy to cause damage.
[0004]
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a carriage that can stably transport an object having a high center of gravity and a small bottom area.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, in a cart having a rectangular platform with casters,
Comprising a fall prevention mechanism for preventing the platform from falling in the short side direction;
The fall prevention mechanism has a pair of rod-like members that can protrude from the platform along the short side direction on both sides,
A pair of connecting members having one end pivotally joined to the distal ends of the pair of rod-shaped members, and the other ends of the pair of connecting members are pivotally joined to each other;
In a state where the pair of rod-shaped members do not protrude on both sides, the pair of connecting members is configured to form a pair of oblique sides of an isosceles triangle on the platform. .
[0006]
According to a preferred aspect of the present invention, the height position of the central pivot joint at the other end of the pair of connecting members is one end of the pair of connecting members in a state where the pair of rod-shaped members protrudes on both sides. It is comprised so that it may become lower than the height position of one pivot joint part and the other pivot joint part. Moreover, it is preferable that the caster is provided in the front-end | tip part of a pair of said rod-shaped member, respectively.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, there is provided a fall prevention mechanism for preventing the platform from falling in the short side direction. Specifically, the fall prevention mechanism has a pair of rod-like members that can protrude from the platform to both sides along the short side direction, for example.
[0010]
Therefore, in the carriage of the present invention, even when an object having a high center of gravity and a small bottom area is placed, the placed object is moved together with the carriage by the action of the pair of rod-shaped members protruding from the platform. It is possible to reliably prevent the body from falling in the short side direction, and as a result, it is possible to stably convey the object placed on the platform.
[0011]
Embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view schematically showing an overall configuration of a cart provided with a fall prevention mechanism according to an embodiment of the present invention. FIG. 2 is a view for explaining the configuration and operation of the fall prevention mechanism in the cart of FIG.
[0012]
Referring to FIG. 1, a carriage 1 according to this embodiment includes a rectangular platform 2 on which an object to be transported is placed. Note that casters are provided at the four corners on the lower side of the platform 2, but are not shown for the sake of clarity of the drawing. A U-shaped handle 3 is erected on the platform 2.
[0013]
Further, the cart 1 of the present embodiment includes a fall prevention mechanism 11 for preventing the platform 2 from falling in the short side direction. Referring to FIGS. 1 and 2, the fall prevention mechanism 11 has a pair of rod-like members 12 and 13 that can project from the platform 2 to both sides along the short side direction. Casters 12b and 13b (not shown in FIG. 1) are provided at the tip portions 12a and 13a of the pair of rod-like members 12 and 13, respectively.
[0014]
Here, in a state of protruding from the platform 2, casters (not shown) are provided at the four corners of the platform 2 with the lower ends of the casters 12 b and 13 b provided at the distal ends 12 a and 13 a of the pair of rod-like members 12 and 13. ) Is set slightly above the lower end.
[0015]
Also, one end of the pair of connecting members 14 and 15 is pivotally joined (pin joined in the paper of FIG. 2) to the tip portions 12a and 13a of the pair of rod-like members 12 and 13. The other ends of the pair of connecting members 14 and 15 are pivotally joined to each other.
[0016]
More specifically, the pair of connecting members 14 and 15 are set so as to extend linearly on the platform 2 in a state where the pair of rod-like members 12 and 13 protrude from the platform 2 in the horizontal direction (FIG. 2). (See (c)). Accordingly, the pair of connecting members 14 and 15 are configured to form an isosceles triangle on the platform 2 in a state in which most of the pair of rod-shaped members 12 and 13 are stored below the platform 2 ( (See FIG. 2 (a)).
[0017]
Therefore, in the present embodiment, as shown in FIG. 2A, when the carriage 1 is not used, most of the pair of rod-like members 12 and 13, that is, the portions other than the tip portions 12 a and 13 a are the platform 2. It is in the lower side. When the cart 1 is used, as shown in FIGS. 2B and 2C, until the pair of connecting members 14 and 15 extend linearly on the platform 2, the joint portion between the pair of connecting members 14 and 15. Push down (vertical part of isosceles triangle).
[0018]
Then, the object to be transported is placed on the platform 2. At this time, the pair of pedestals 4a and 4b may be provided on the platform 2 so that the pair of connecting members 14 and 15 extending linearly on the platform 2 does not hinder the stable placement of the object. preferable. In this case, it goes without saying that the height positions of the upper side surfaces of the bases 4a and 4b are set slightly higher than the height positions of the upper side surfaces of the pair of connecting members 14 and 15 extending linearly on the platform 2. Nor.
[0019]
Further, when the carriage 1 is used exclusively for transporting an object having a predetermined dimension, it is preferable that rod-shaped holding guides (not shown) are erected at the four corners on the upper side of the platform 2. In this case, the object can be stably held on the platform 2 by the action of the four holding guides. Thus, the transporter can transport the object placed on the platform 2 by holding the handle 3 and pushing or pulling the carriage 1.
[0020]
It should be noted that the pair of rod-shaped members 12 and 13 are prevented from protruding beyond a predetermined distance from the platform 2 at the base end portions (the ends opposite to the tip portions 12a and 13a) of the pair of rod-shaped members 12 and 13. It is preferable to provide a stopper for this purpose. With this configuration, when the pair of connecting members 14 and 15 extend linearly on the platform 2 as shown in FIG. 2C, the pair of rod-like members 12 and 13 freely move with respect to the platform 2. Can be prevented.
[0021]
By the way, in this embodiment, as shown in FIG. 2C, when the pair of connecting members 14 and 15 extend linearly on the platform 2, the tip portions 12a and 13a of the pair of rod-like members 12 and 13 Therefore, even if a force toward the center acts, there is no danger of falling easily as shown in FIG. Hereinafter, this point will be briefly described with reference to FIG.
[0022]
As shown in FIG. 3, in a state where the pair of connecting members 14 and 15 extend linearly on the platform 2, the pivot joint C between the distal end portion 12 a of the rod-shaped member 12 and one end of the connecting member 14, and the rod-shaped member The pivot joint portion A between the distal end portion 13a of the joint 13 and one end of the connecting member 15 and the pivot joint portion B between the other end of the connecting member 14 and the other end of the connecting member 15 are not arranged at the same height position. . That is, the state in which the central pivot joint B is in contact with the platform 2 by the action of gravity is a stable state. In this stable state, the height position of the central pivot joint B is the pivot joint C and pivot joint A at both ends. It becomes lower than the height position. Therefore, as shown in FIG. 3, even if a force toward the center (indicated by an arrow F in the figure) acts on the tip portions 12a and 13a of the pair of rod-like members 12 and 13, the pair of connecting members 14 and 15 Is maintained in a straight line on the platform 2 and does not fall into a dangerous state as shown in FIG.
[0023]
As described above, in the present embodiment, as the fall prevention mechanism 11 for preventing the platform 2 from falling in the short side direction, the pair of rod-like members 12 that can protrude from the platform 2 to both sides along the short side direction. And 13 are provided. Therefore, even when an object having a high center of gravity and a small bottom area is placed, the object can be reliably prevented from falling with the carriage 1 in the short side direction of the platform 2, and the object can be stably Can be transported.
[0024]
In the above-described embodiment, the pair of rod-shaped members 12 and 13 and the pair of connecting members for driving the pair of rod-shaped members 12 and 13 constitute a fall prevention mechanism, but the present invention is not limited to this. Without limitation, various modifications are possible as the fall prevention mechanism.
[0025]
【The invention's effect】
As described above, in the present invention, as a fall prevention mechanism for preventing the platform from falling in the short side direction, for example, the platform has a pair of rod-like members that can project from the platform to both sides along the short side direction. Therefore, even when an object having a high center of gravity and a small bottom area is placed, the object can be reliably prevented from falling in the short side direction of the platform together with the carriage, and the object is stably conveyed. be able to.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing an overall configuration of a cart provided with a fall prevention mechanism according to an embodiment of the present invention.
2 is a diagram for explaining the configuration and operation of a fall prevention mechanism in the cart of FIG. 1; FIG.
FIG. 3 is a danger that the pair of connecting members easily fall down as shown in FIG. 2B even if a force toward the center acts on the distal ends of the pair of rod-shaped members when the pair of connecting members extend linearly on the platform. It is a figure explaining not being in a state.
[Explanation of symbols]
1 cart 2 platform 3 handle 4 pedestal 11 fall prevention mechanism 12, 13 pair of rod-like members 12b, 13b casters 14, 15 pair of connecting members

Claims (3)

In a cart having a rectangular platform with casters,
Comprising a fall prevention mechanism for preventing the platform from falling in the short side direction;
The fall prevention mechanism has a pair of rod-like members that can protrude from the platform along the short side direction on both sides,
A pair of connecting members having one end pivotally joined to the distal ends of the pair of rod-shaped members, and the other ends of the pair of connecting members are pivotally joined to each other;
In the state in which the pair of rod-shaped members do not protrude on both sides, the pair of connecting members is configured to form a pair of oblique sides of an isosceles triangle on the platform. The height position of the central pivot joint on the other end of the pair of connecting members is such that one pivot joint on one end of the pair of connecting members and the other in the state where the pair of rod-shaped members protrude on both sides . The cart according to claim 1, wherein the carriage is configured to be lower than a height position of the pivot joint portion.   The cart according to claim 1 or 2, wherein a caster is provided at each of the tip ends of the pair of rod-shaped members.

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