JPH0741602Y2 - Trolley device - Google Patents

Description

[Detailed Description of the Invention] <Industrial application field> The present invention relates to a trolley device for material transportation used in a construction site or the like, and in particular, runs on an uneven surface such as a keystone plate in which trapezoidal parallel grooves are continuous. The present invention relates to a trolley device suitable for.

<Prior Art> In building a building, a keystone plate having a V-shaped or trapezoidal parallel groove formed therein may be used as a basic construction means of the floor surface. At this time, when a flat floor surface is formed immediately after laying the plate by concrete sinking or the like, material transportation using a trolley on the floor surface can be carried out without any trouble.

However, in such a case, it is not possible to work on the floor from the concrete sink to its hardening, and from the improvement of the construction method in recent years, it is necessary to move the objects on the keystone plate and various works, Along with this, there has been a demand for a dolly that can freely travel on a plate deck of this type that is markedly uneven.

Therefore, the applicant of the present application configured each wheel portion previously installed at the lower surface corner of the trolley with a group of casters in which free casters were arranged at the apexes of the plane triangle, and at least one of the group of casters was formed. Provides a carriage device (see Japanese Utility Model Laid-Open No. 59-165265) which is always in contact with the convex surface of the plate, and has a considerable usefulness in practical use.

<Problems to be solved by the invention> By the way, in the trolley device proposed above, three or more free casters arranged at intervals in each corner of the trolley bridge the convex streak surface of the keystone plate or its Since at least one of them is in contact with the surface, it is intended to prevent the wheel from falling into the groove in the corner portion of the carriage.
As a result, some of the plurality of free casters may be lifted in the air above the concave groove when moving over the concave groove while the vehicle is traveling, and deviating from the previous convex ground contact state.

On the other hand, the universal caster, as is well known, supports the axle support by a rotating shaft that is offset from the position directly above it, so that the two-way rolling wheel is directional by the turning motion of the rotating shaft. It was made possible to roll freely in the direction of the surroundings.

Therefore, when the wheels of the universal caster are grounded, the direction in which the grounding resistance is the smallest with respect to the moving direction of the mounting carriage, that is, the rotating shaft and the axle position are linear positions with respect to the moving direction. As the axle support pivots like this, smooth rolling is achieved, but when the wheel floats in the air or rides on a small projection on the road surface, the inertia Alternatively, the axle support may inadvertently turn around the rotation axis due to the tilt of the carriage, which causes the wheels of the universal casters to have different directions, which hinders the vehicle from traveling in a certain direction. Wake up. Therefore, if the wheels are forced to travel in the same direction, the workability becomes troublesome.

Therefore, an object of the present invention is to provide a trolley device in which the casters in the wheel portion can always be aligned in the same direction in order to prevent such an unexpected situation.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the structure of the present invention is such that a wheel portion is provided in a square of a carriage mount, and each wheel portion includes a bracket and three or more free casters arranged on the bracket. In a trolley device in which at least one of the universal casters is in contact with the convex surface of the uneven running surface, each universal caster has wheels, a support body pivotally supported by the wheels, and a support body that rotates on a mounting shaft on the bracket side. A shaft mounting portion that can be freely attached is provided so that the wheels and support members of the respective universal casters are aligned in the same direction, and they always rotate in the same direction via a gear mechanism, a chain belt or a V belt. It is characterized by having done.

<Operation> When one wheel rotates, the other wheels also rotate in the same direction via the gear mechanism or the like, so that the casters are always aligned in the same direction, so that the vehicle can travel smoothly.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

In the bogie device of the present invention, wheel portions 13 are provided at four corners of a bogie base 14, and each wheel portion 13 comprises a bracket 1 and three or more free casters 3 arranged at the corners of the bracket 1, and at least the free casters 3 are provided. One is in contact with the convex surface of the uneven running surface.

Each of the swivel casters 3 at each corner has a wheel 4, a support 6 pivotally supported by the wheel 4, and a shaft mounting portion 7 for rotatably assembling the support 6 to the mounting shaft 2 on the bracket 1 side. .

The wheels 4 and the support 6 of each of the swivel casters 3 are arranged so as to be aligned in the same direction, and are always turned in conjunction with each other in the same direction via a gear mechanism.

As shown in FIGS. 1 and 2, the gear mechanism is composed of a gear 9 provided on the outer periphery of each support and a central gear 10 on the bracket 1 side on which the gear 9 is rotatably meshed.

The universal caster 3 is rotatably mounted on the mounting shaft 2 by a support body 6 which supports a wheel 4 of the universal caster 3 on a shaft 5 via a shaft mounting portion 7 including a bearing bearing mechanism. Then, a gear 9 is integrally attached to the outer periphery of a swivel support shaft portion 8 which is a mounting base portion of the support body 6 in the universal caster 3.

On the other hand, 10 is a central gear, which is rotatably installed on the bracket 1 by a support shaft 11 at a position meshing with the gear 9.

As shown in FIG. 2, the bracket 1 is formed in a triangular shape, and the casters 3 are arranged at respective corners of the bracket 1 around the support shaft 11 of the central gear 10. The gears 9 are meshed with the central gear 10, respectively. And it should be noted that these are the central gears of each gear 9.
When engaging with 10, the casters 3 are mounted so that the orientations of the casters 3 (the orientation of the wheels 4 relative to the mounting shaft 2) are the same, and the outer width W1 and the inner width W2 between the wheels of each caster 3 are Keystone plate of which an example is shown in Fig. 4
The twelve concave groove widths L1 and the convex surface widths L2 are L1 <W1, L2> W2.

FIG. 3 is a side view showing a state of installation on a dolly, in which wheel portions 13 each having three free casters 3 arranged at each corner of the bracket 1 are respectively installed on the lower squares of a dolly frame 14.

In the illustrated embodiment, the structure of the gear mechanism including the gear 9 and the central gear 10 is shown as a means for integrally connecting the swivel support shaft portions 8 of the respective free casters 3, but as another reference example, a chain belt Alternatively, it can be used even if a belt system around which a V-belt is wound is adopted.

According to the embodiment having such a configuration, the carriage traveling on the floor deck covered with the keystone plate 12 is
The wheel portions 13 provided at the four corners of the plate 12 move while successively riding over the concave and convex groove surfaces of the plate 12. At this time, the wheel portions 13
Since it has three swivel casters 3 and the distance between each wheel is wider than the groove width L1, the two wheels 4 in each swivel cast the bridging groove. Even if one wheel 4 floats up in the groove, the other wheel 4 will come into contact with the convex surface and the wheel portion 13 will not fall into the groove. There are things to prevent.

Moreover, according to this embodiment, since the three swivel casters 3 are integrally connected with the swivel supporting shaft portions 8, the individual swivel casters 3 do not swivel freely. Since the vehicle always operates in the same direction, the traveling directions are the same and the vehicle can be smoothly driven.

<Effect of the Invention> According to the device of the present invention, the wheels of the universal casters are aligned in the same direction, and the gears always rotate in the same direction via the gear mechanism. The swivel caster also turns in the same direction via the central gear, so that each wheel always travels in the same direction, and the traveling operation of the trolley is easy and smooth.
Workability is improved.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view showing a main part of the device of the present invention, and FIG.
FIG. 3 is a structural layout view of a wheel portion in the device of the present invention, FIG. 3 is a side view of a truck showing an installed state of the device of the present invention, and FIG. 4 is a side view showing an example of a keystone plate. 1 ... Bracket, 2 ... Mounting axis, 3 ... Flexible caster, 4 ... Wheel, 6 ... Support, 7 ... Shaft mounting section, 8 ...
Swivel support shaft part, 9 ... Gear, 10 ... Central gear, 13 ... Wheel part, 14 ... Bogie mount.

Claims (1)

[Scope of utility model registration request] 1. Wheel parts are provided at four corners of a bogie base, and each wheel part is composed of a bracket and three or more free casters arranged on the bracket, and at least one of the free casters contacts a convex surface of an uneven running surface. In the dolly device
Each of the universal casters is arranged in the same direction, and each of the universal casters comprises a wheel, a support body pivotally supported by the wheel, and a shaft mounting portion that rotatably assembles the support body to a mounting shaft on the bracket side. Further, a gear mechanism is further provided between the bracket and each of the universal casters, and the gear mechanism is composed of a gear provided on the outer periphery of each support, and a central gear on the bracket side on which the gear rotatably meshes, A bogie device that allows the universal casters to always rotate in the same direction via a gear mechanism.