JP7313705B2 - trolley - Google Patents

Description

The present invention relates to a trolley used for transporting building members and other loads (hereinafter simply referred to as "loads").

Carriages are used to transport loads at construction sites, civil engineering sites, and the like. For example, at construction sites such as buildings and condominiums, a cart A (FIGS. 8A and 8B) is used to transport various materials. 8(a) and 8(b) is a general-purpose vehicle, and has wheels (casters) C at the four corners of a quadrangular (rectangular) pedestal B. As shown in FIG.

There are various kinds of loads to be placed on the carriage A, from light and small ones to heavy and long ones. In addition, there are various ways of using the truck A. In the case of a long heavy object such as an exterior wall material, the exterior wall material D is placed across two trucks A arranged in front and behind as shown in FIGS. In this case, when the truck A approaches a slope (FIG. 8(a)) or a passage with steps (FIG. 8(b)), the wheel C (rear wheel in FIGS. 8(a) and (b)) on the lower side of the slope or the lower side of the step may float. In this case, the load of the exterior wall material D concentrates on the wheels C (the front wheels in FIGS. 8A and 8B) and the front frame E, which are in contact with the passage, so the front wheel mounting portion of the pedestal B and the front frame E are required to have strength to withstand the concentrated load. When the truck A is turned in the opposite direction, a concentrated load is applied to the rear wheels C and the rear frame F of the truck A, so the rear wheel mounting portion of the pedestal B and the rear frame F are required to have strength to withstand the concentrated load. For this reason, the pedestal B is made of steel (a steel carriage).

When the building is an apartment building or a building, it is necessary to raise building materials to the upper floors. In this case, as shown in FIGS. 6(a)(b) and 7(a)(b), building materials are usually placed on a cart A, and the worker unloads the building materials to empty the cart A, which is then returned to the material storage area below. However, although it depends on the size of the steel trolley, a typical trolley weighs more than 20 kg, which puts a heavy burden on workers.

The applicant of the present application has previously proposed a truck (aluminum truck) using an aluminum material that is lighter in weight than a steel material (Patent Document 1).

JP 2017-154664 A

Aluminum trucks are lightweight and have the advantage of reducing the burden on workers, but are inferior to steel trucks in strength.

The present invention has been made in view of such circumstances, and the problem to be solved is to provide a truck that is lighter than steel trucks and superior in strength to conventional aluminum trucks.

The trolley of the present invention is provided with casters on the back surface of a pedestal formed into a square shape by connecting at least the front and rear frame members and the left and right frame members. At least the front and rear frame members and the left and right frame members of the pedestal are made of aluminum.

Since at least the front and rear frame members and the left and right frame members of the bogie of the present invention are made of aluminum, they are lighter than those made of steel. In addition, since the ribs protrude vertically on the rear surface of the aluminum reinforcing member, the strength is greater than that of a simple aluminum flat plate.

The perspective view of an example of the truck of this invention. 1 is an exploded view of a truck of the present invention; FIG. (a) is a side view of the caster attachment part in the truck of this invention, (b) is a front view of (a). (a) is a plan view of the truck of the present invention, (b) is a side view of (a), and (c) is a front view of (a). Explanatory drawing of other embodiment of the truck of this invention. (a) is a plan view of a state in which two trolleys are arranged in front and behind and loaded with building materials, and (b) is a side view of (a). (a) is a plan view of two trolleys placed side by side with construction materials placed thereon, and (b) is a side view of (a). (a) is an explanatory view when using a conventional trolley as shown in FIGS. 6(a)(b) and 7(a)(b), when approaching a slope, and (b) is an explanatory view when approaching a step.

(Embodiment 1)
An embodiment of the truck of the present invention will be described based on the drawings. As shown in FIGS. 1 and 4(a) to 4(c), the bogie 1 of the present invention has an outer frame 6 formed by connecting a front frame member 2, a rear frame member 3, and left and right frame members 4 and 5 in a rectangular frame shape. An elongated cushion member 10 is fixed to the upper surfaces of the front frame member 2, the rear frame member 3, and the left and right frame members 4 and 5. As shown in FIG. Reinforcing members 11 are attached to the rear surface of the four corners of the outer frame 6, and casters 12 are attached to the rear surface thereof.

As shown in FIG. 2, the front frame member 2 comprises two downward L-shaped elongated members 2a and 2b facing each other. The elongated members 2a, 2b are made of aluminum.

As shown in FIG. 2, the rear frame member 3 is composed of two elongated L-shaped members 3a and 3b facing each other. The elongated members 3a, 3b are made of aluminum.

As shown in FIG. 2, the left and right frame members 4 and 5 are long, inward L-shaped members when viewed from the side, and are made of aluminum.

As shown in FIG. 2, the vertical member 7 is a square member or downwardly U-shaped, and is arranged and fixed between the front frame member 2 and the rear frame member 3 .

The corner members 8 are the same as those used in general-purpose trucks, are made of steel, and have a substantially V-shape.

The cushion material 10 is an elastic material such as a rubber plate or a resin plate. The screwing portion is recessed one step below its surrounding upper surface.

A reinforcing member 11 is made of aluminum, and is provided with ribs 13 protruding downward by bending one side of a flat plate downward into an L shape, and is fixed to the rear surface of the outer frame 6 at the four corners with the ribs 13 facing downward.

The caster 12 is a general-purpose one, and may be of a rotating type or a fixed type. The caster 12 is fixed to the back surface of the reinforcing member 11 as shown in FIGS. 3(a) and 3(b). A mounting plate 12a for the caster 12 is provided. Casters 12 may be other than shown.

The front frame member 2, the rear frame member 3, the left and right frame members 4 and 5, the vertical member 7, the corner member 8, the cushion member 10, the reinforcing member 11, and the casters 12 are connected by screws, bolts and nuts.

(Embodiment 2)
The reinforcing member 11 in the present invention may be in the shape of an elongated plate as shown in FIG. Both the reinforcing member 11 and the rib 13 are made of aluminum. In FIG. 5, a large number of ribs 13 are protruded parallel to each other at predetermined intervals in the longitudinal direction of the reinforcing member 11 . This reinforcing member 11 is fixed to the rear surfaces of the front frame member 2 and the rear frame member 3, and casters 12 are attached to the rear surfaces thereof.

(Embodiment 3)
The carriage 1 of the present invention is not limited to those of the first and second embodiments. The shape, size, and structure of the reinforcing member 11, the location where the reinforcing member 11 is attached to the pedestal 9, the number of ribs 13, the distance between protrusions, the shape, the direction of protrusion, etc., can be changed in design within the range that can solve the above problems. For example, the reinforcing member 11 may not have a flat plate shape, but may have both edges in the width direction or one edge bent downward or upward, or may have a box shape when viewed from the side, or may have ribs protruding from the bottom surface thereof.

The trolley of the present invention can be used not only for transporting building materials, but also for transporting any load as long as it is within the load capacity. In addition, it is possible to use two or more units in combination as well as to use them individually one by one.

1 bogie 2 front frame member 2a, 2b (front frame member) elongated member 3 rear frame member 3a, 3b (rear frame member) elongated member 4, 5 left and right frame member 6 outer frame 7 vertical member 8 corner member 9 pedestal 10 cushion member 11 reinforcing member 12 caster 12a mounting plate 13 rib A carriage B pedestal C wheel D outer wall member E (pedestal) Car's front frame F Rear frame (bogie)

Claims (4)

A trolley provided with casters on the back surface of a pedestal formed into a square by connecting at least a front frame member, a rear frame member , a left frame member and a right frame member,
the front frame member, the rear frame member , the left frame member, and the right frame member are made of aluminum;
A front reinforcing member made of aluminum is provided on the back surface of the front frame member , the left frame member, and the right frame member ,
Rear side reinforcing members made of aluminum are provided on the rear surfaces of the rear frame member, the left frame member and the right frame member,
The front side reinforcing member and the rear side reinforcing member are flat plate-shaped,
Flat plate-shaped aluminum ribs protruding downward are provided on the back surfaces of the front side reinforcing member and the rear side reinforcing member in parallel with the left frame member and the right frame member ,
The front frame member is attached to the upper surface of the front reinforcing member and connected together with the front reinforcing member and a front caster mounting plate arranged on the back side of the front reinforcing member,
The rear frame member is attached to the upper surface of the rear reinforcing member and connected together with the rear reinforcing member and a mounting plate for the rear caster arranged on the back side of the rear reinforcing member,
Each of the left frame member and the right frame member has one longitudinal end side attached to the upper surface of the front reinforcing member, and is connected with a front caster mounting plate arranged on the back side of the front reinforcing member and the front reinforcing member.
A trolley characterized by: The trolley of claim 1,
The front frame material, the front reinforcing material, and the mounting plate of the front caster are connected with bolts,
The rear frame material, the rear reinforcing material, and the mounting plate of the caster on the rear side are connected with bolts,
One longitudinal end of each of the left frame member and the right frame member, the front reinforcing member, and the mounting plate of the front caster are connected with bolts,
The other longitudinal ends of the left frame member and the right frame member, the rear reinforcing member, and the mounting plate of the rear caster are connected with bolts,
A trolley characterized by: In the truck according to claim 1 or claim 2,
A vertical member is connected between the front frame member and the rear frame member,
A trolley characterized by: In the truck according to any one of claims 1 to 3 ,
Two or more ribs protrude from the back of the stiffener,
A trolley characterized by:

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