JP2024090523A - Flatbed truck - Google Patents

Abstract

To provide a lightweight, strong flatbed truck whose handle can be attached and detached without contacting and interfering with the load.
[Solution] The platform trolley 100 comprises a trolley body 10 formed into a quadrangle by connecting front and rear frame members 11a, 11b and left and right frame members 12a, 12b via four connecting members 13, four casters 20 provided on the underside of the four corners of the trolley body, a connecting hook 30 having an engaging recess provided in the middle part of the underside of either or both of the front and rear frame members, and a rod-shaped handle 40 having a gripping portion 41 at one end and an engaging fitting at the other end that can be engaged and disengaged with the engaging recess, the four connecting members being rectangular or polygonal plate materials and provided on the underside of the four corners of the trolley body, and the four casters are attached to the underside of the connecting members.
[Selected Figure] Figure 1

Description

The present invention relates to a platform cart used for carrying and transporting cargo.

Traditionally, cargo transport carts have been widely used in a variety of fields, from transporting cargo in factories and construction sites to home delivery. Such cargo transport carts are formed with casters for running attached to the four corners of the underside of a rectangular base, and cargo can be placed on the base of the cart and transported by workers pushing or pulling it.

Also, as a prefabricated platform cart, a platform cart that can be easily assembled by combining frames has been proposed (see, for example, Patent Document 1). The platform cart described in Patent Document 1 consists of two sets of long and short frames and four casters, and both ends of the long frames are bent inward at a right angle in a plan view, and the tip is bent outward at a right angle to form a hook shape, and mounting holes are machined into the hook-shaped part at the tip, and both ends of the short frames are hollowed out to form a concave hook shape so that the convex hook shapes at both ends of the long frames can interlock, and this concave hook shape is formed so that each of the four long and short frames interlocks with each other at a right angle, and each of the four corners of the interlocking crest is attached to the base of the caster with screws and nuts.

Furthermore, a handle for a flatbed truck has been proposed that can be engaged with and detached from a handle hole used to pull or push a flatbed truck that has handle holes on the periphery of the base plate for carrying the truck when empty, and is used in cases such as when transporting boxed goods in supermarkets and displaying and selling the transported goods as is (see, for example, Patent Document 2).

The handle for a flatbed truck described in Patent Document 2 is a handle for a flatbed truck that is engaged with and disengaged from the periphery of a rectangular handle hole drilled along the edge of at least the middle of the front and rear edges of the rectangular base plate of the flatbed truck, and is characterized by comprising an engagement fitting in which a strip plate narrower than the length of the handle hole is bent to follow the side and top surface of the base plate around the handle hole, the plane extending from the outer upper edge of the handle hole to the inner lower edge, and the bottom surface of the base plate, and a rod-shaped handle body of the required length with a grip at one end, and the other end of the handle body is rotatably connected to the outside of the portion of the engagement fitting that follows the side surface of the base plate via a horizontal connecting pin.

Japanese Patent No. 5950229 Japanese Patent No. 3498286

However, conventional flatbed trucks such as those described in Patent Document 1 have problems with their complicated structure and high processing costs because the tips of the four long and short frames are formed with concave and convex hook shapes to allow them to interlock with each other.

In addition, conventional handles for flatbed trucks, such as those described in Patent Document 2, are designed to engage by inserting the handle's engaging hardware into a handle hole (mounting hole) provided on the loading surface of the flatbed truck, which creates the problem that the load and the handle's engaging hardware come into contact and interfere when the truck is used, raising concerns about the safety of the load. There is also the problem that if there is a load on top of the handle's engaging hardware, the handle cannot be removed from the truck body.

The present invention was made to solve these problems with the prior art, and its purpose is to provide a platform truck that is lightweight, has high strength, and has a handle that can be attached and detached without coming into contact with the load.

Another object of the present invention is to provide a platform car that can be easily replaced and reused even if part of it is damaged.

According to the present invention, the flatbed truck comprises a truck body formed into a quadrangle by connecting front and rear frame members and left and right frame members via four connecting members, four casters provided on the underside of the four corners of the truck body, a connecting hook with an engaging recess provided in the middle of the underside of either or both of the front and rear frame members, and a rod-shaped handle with a gripping portion at one end and an engaging metal fitting at the other end that can be engaged and disengaged with the engaging recess, the four connecting members being rectangular or polygonal plate members provided on the underside of the four corners of the truck body, and the four casters attached to the underside of the connecting members.

In a flatbed truck, the front and rear frame members and the left and right frame members are connected via four connecting members to form a quadrangle, and casters are provided on the underside of each of the four corners of the truck body. A connecting hook with an engaging recess is provided in the middle of the underside of either or both of the front and rear frame members, and a rod-shaped handle is provided with an engaging metal fitting that can be engaged and disengaged with the engaging recess. This allows the worker to push or pull the truck, and is lightweight, has a simple structure, and can be attached and detached without the handle coming into contact with the load (luggage). It also allows for a significant reduction in processing costs.

The connecting hook has a pair of U-shaped engagement recesses that are erected at a specified distance from one long side of a rectangular base made of a metal plate, and the base is fixed to the middle part of the underside of either the front or rear frame material, and the handle engagement fitting is made of a T-shaped plate material and preferably has a bent part at the tip. This prevents the handle from coming into contact with the load and makes it easy to attach and remove the handle.

The front and rear frame members and the left and right frame members are fixed to the upper surface of the connecting member with screws at their respective ends, and are connected to each other. It is also preferable that the four casters are attached to the lower surface of the connecting member with screws. This allows parts to be easily replaced and reused if they are damaged.

It is also preferable that the front and rear frame materials and the left and right frame materials are formed from aluminum extrusions with an L-shaped cross section. This makes them lightweight, improves work efficiency, while maintaining sufficient strength and is highly recyclable.

It is preferable that the vertical sides of the left and right frame members are provided with multiple holes through which strings can be inserted to secure the load placed on the cart body. This helps prevent the load from falling over.

It is preferable that the upper end and corners of the aluminum extrusion material in a cross-sectional view are reinforced. This improves the strength of the trolley body, providing a trolley with superior strength compared to conventional aluminum trolleys.

According to the present invention, the flatbed truck is formed into a quadrangle by connecting the front and rear frame members and the left and right frame members via four connecting members, and has casters on the underside of each of the four corners of the truck body. A connecting hook with an engaging recess is provided in the middle of the underside of either or both of the front and rear frame members, and a rod-shaped handle is provided with an engaging metal fitting that can be engaged and disengaged with the engaging recess. This allows the flatbed truck to be pushed or pulled by an operator, is lightweight and strong, and can be attached and detached without the handle coming into contact with the load. It also allows for a significant reduction in processing costs.

The front and rear frame members and the left and right frame members are connected to each other by fastening their ends to the upper surface of the connecting member with screws, and the four casters are attached to the lower surface of the connecting member with screws, so if any part is damaged, it can be easily replaced and reused.

In addition, the front and rear frame materials and the left and right frame materials are made from aluminum extrusions with L-shaped cross sections, which makes them lighter and improves work efficiency while maintaining sufficient strength and making them highly recyclable.

FIG. 1 is a perspective view showing a schematic configuration of a flatbed truck according to a first embodiment of the present invention. FIG. 2 is a side view showing a schematic configuration of the flatbed truck of FIG. 1 . FIG. 2 is a top view showing a schematic configuration of the flatbed truck of FIG. 1 . FIG. 2 is a bottom view showing a schematic configuration of the flatbed truck of FIG. 1 . FIG. 2 is a rear view showing the schematic configuration of the flatbed truck of FIG. 1 . 2 is a cross-sectional view of the front and rear frame members and the left and right frame members of the flatbed truck of FIG. 1 . FIG. 2 is a perspective view showing a schematic configuration of a coupling hook of the flatbed truck of FIG. 1 . FIG. 2 is a perspective view showing a schematic configuration of an engaging fitting of the platform truck of FIG. 1 .

Below, an embodiment of a flatbed truck according to the present invention will be described with reference to the drawings. The flatbed truck according to the present invention is for transporting luggage placed on it. In other words, it is a truck for transporting luggage that can be transported by placing luggage on it and pushing or pulling it by an operator.

Figure 1 shows a schematic configuration of a platform cart 100 according to a first embodiment of the present invention, and Figure 2 shows a side view of the platform cart 100. Figure 3 shows the platform cart 100 as viewed from above. Figure 4 shows the platform cart 100 as viewed from below. Figure 5 shows the platform cart 100 as viewed from the rear side (handle side). Figure 6 is a cross-sectional view taken along line A-A in Figure 1. Figure 7 is a perspective view showing a schematic configuration of the coupling hook. Figure 8 is a perspective view showing a schematic configuration of the engaging fitting.

As shown in Figures 1 to 5, the platform cart 100 of this embodiment includes a cart body 10 for placing luggage, four casters 20 provided on the underside of the four corners of the cart body 10, a coupling hook 30 with an engaging recess 32 provided in the middle of the underside of either the front or rear frame member, and a rod-shaped handle 40 with an engaging fitting 42 that can be engaged and disengaged with the engaging recess 32.

The bogie body 10 is formed in a quadrangle by connecting the front and rear frame members 11a and 11b and the left and right frame members 12a and 12b via four connecting members 13. Each of the front and rear frame members 11a and 11b and the left and right frame members 12a and 12b is formed from an aluminum extrusion with an L-shaped cross section (see FIG. 6). The front and rear frame members 11a and 11b and the left and right frame members 12a and 12b are fixed to the upper surface of the connecting member 13 by screws at their respective ends and connected to each other. The four connecting members 13 are rectangular plate materials and are provided on the underside of the four corners of the bogie body 10. In addition, the upper end and corners of the aluminum extrusions of the front and rear frame members 11a and 11b and the left and right frame members 12a and 12b in cross section are reinforced. As shown in FIG. 6, a reinforcing portion T with a roughly semicircular protrusion in cross section is formed on the inside of the upper end, and a reinforcing portion R is formed at the corner. In addition, the vertical sides of the left and right frame members 12a and 12b are provided with multiple holes 14 through which strings can be inserted to secure the load placed on the dolly body. For example, extremely low head hexagon socket bolts are used to attach the front and rear frame members 11a and 11b to the left and right frame members 12a and 12b.

The four casters 20 are commercially available swivel casters, and are attached to the underside of the connecting member 13 by screws. The casters 20 may be either swivel or fixed. The mounting screws 21 of the casters 20 are the same as the screws used to fix the front and rear frame members 11a and 11b and the left and right frame members 12a and 12b to the connecting member 13. In other words, the mounting screws 21 fix the front and rear frame members 11a and 11b and the left and right frame members 12a and 12b to the connecting member 13, and also fix the casters 20 to the connecting member 13. The mounting screws 22 of the casters 20 fix only the casters 20 to the connecting member 13. This reduces the number of parts and reduces processing costs. For example, very low head hexagon socket bolts are used for the mounting screws 21 and 22.

As shown in FIG. 7, the connecting hook 30 has a pair of U-shaped engaging recesses 32 that are erected at a predetermined distance from one long side of a rectangular base portion 31 made of a metal plate, and the base portion 31 is fixed to the middle of the underside of either the front or rear frame members 11a or 11b (for example, the rear frame member 11b).

The handle 40 is rod-shaped with a gripping portion 41 at one end and an engaging fitting 42 at the other end that can be engaged with and disengaged from the engaging recess 32. As shown in FIG. 8, the engaging fitting 42 is made of a T-shaped plate material with a bent portion 42a at the tip. The mounting portion also has through holes 42b for mounting. The engaging fitting 42 is attached to the rod via these through holes 42b for mounting.

As described above, the flatbed truck 100 in this embodiment is equipped with a truck body 10 for placing luggage, four casters 20 provided on the underside of the four corners of the truck body 10, a coupling hook 30 having an engagement recess 32 provided in the middle of the underside of either the front or rear frame material, and a rod-shaped handle 40 having an engagement metal fitting 42 that can be engaged and disengaged with the engagement recess 32, so that the worker can push or pull it, it is lightweight and strong, and the handle 40 can be attached and detached without contacting and interfering with the load. In addition, the processing cost can be significantly reduced. In addition, the physical burden on the worker when handling the flatbed truck 100 can be reduced. Furthermore, since the engagement recess 32 is provided on the underside of the rear frame material 11b, the handle 40 can be attached and used with luggage placed on it, and since the planar area of the truck body 10 does not increase, it does not get in the way when stored.

In addition, the handle 40 does not come into contact with or interfere with the load (luggage), and the handle 40 can be easily attached and removed.

In addition, the front and rear frame members 11a and 11b and the left and right frame members 12a and 12b are fixed to the upper surface of the connecting member 13 with screws at their respective ends and are connected to each other, and the four casters 20 are attached to the lower surface of the connecting member 13 with screws, so if any parts are damaged, they can be easily replaced and reused.

In addition, the front and rear frame members 11a and 11b and the left and right frame members 12a and 12b are made from aluminum extrusions with L-shaped cross sections, which makes them lighter and improves work efficiency while maintaining sufficient strength and making them highly recyclable.

In addition, the vertical sides of the left and right frame members 12a and 12b are provided with multiple holes 14 through which strings can be inserted to secure the load placed on the cart body 10, preventing the load from falling over.

In addition, the upper end and corners of the cross-sectional view of the aluminum extrusion are reinforced, which improves the strength of the trolley body 10.

In the embodiment of the platform truck 100 described above, the front and rear frame members 11a and 11b and the left and right frame members 12a and 12b are formed from aluminum extrusions with an L-shaped cross section, but the present invention is not limited to this. They may be formed from aluminum extrusions with other cross-sectional shapes (such as square pipes).

In the embodiment of the platform cart 100 described above, the connecting hook 30 is provided only on the rear frame member 11b, but the present invention is not limited to this. It may also be provided on the front frame member 11a. In this case, the handle 40 can be engaged with either the front or rear frame members 11a or 11b to push or pull the platform cart 100.

Furthermore, in the above-described embodiment of the platform cart 100, the connecting member 13 is a rectangular plate material, but the present invention is not limited to this. For example, a polygonal plate material may be used for the connecting member 13.

The above-described embodiments are illustrative of the present invention and are not limiting, and the present invention can be implemented in various other modified and altered forms. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

REFERENCE SIGNS LIST 10 Dolly body 11a Front frame member 11b Rear frame member 12a, 12b Left and right frame members 13 Connection member 14 Hole 20 Caster 21, 22 Mounting screw 30 Joint hook 31 Base portion 32 Engagement recess 40 Handle 41 Grip portion 42 Engagement metal fitting 42a Bending portion 42b Through hole 100 Flat dolly R, T Reinforcement portion

Claims (6)

A bogie body formed in a quadrangle by connecting front and rear frame members and left and right frame members via four connecting members;
Four casters are provided on the underside of the four corners of the cart body, respectively;
a coupling hook having an engagement recess provided in a middle portion of a lower surface of either or both of the front and rear frame members;
a rod-shaped handle having a grip portion at one end and an engagement fitting at the other end that can be engaged with and disengaged from the engagement recess;
The four connection members are rectangular or polygonal plate members and are provided on the underside of the four corners of the carriage body,
The four casters are attached to the underside of the connecting member. The connecting hook has a pair of U-shaped engaging recesses provided at a predetermined distance from one long side of a rectangular base portion made of a metal plate, and the base portion is fixed to a lower surface intermediate portion of one of the front and rear frame members,
2. The platform truck according to claim 1, wherein the engaging fitting of the handle is made of a T-shaped plate material and has a bent portion at its tip. The front and rear frame members and the left and right frame members are fixed to the upper surface of the connecting member by screws at their respective ends, and are connected to each other.
3. The platform truck according to claim 1, wherein the four casters are attached to the lower surface of the connecting member by screws. The flatbed truck according to claim 1 or 2, characterized in that the front and rear frame members and the left and right frame members are formed from aluminum extrusions with an L-shaped cross section. The flatbed truck according to claim 4, characterized in that the vertical sides of the left and right frame members are provided with a number of holes through which strings for fastening the load placed on the truck body can be inserted. The platform truck according to claim 4, characterized in that the upper end and corners of the aluminum extrusion material in a cross-sectional view are reinforced.

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