JPH0431164Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a lifting device that is installed at the opening of a side door or rear door of a van-type vehicle to load and unload cargo.

Conventional technology The lifting device installed in the opening of the side door or rear door of this type of van-type vehicle has been
As published in Publication No. 58-4890, a single pillar is erected on the floor of the vehicle, a sliding member that can slide up and down is provided on this pillar, and a cargo receiving platform is pivotally attached to this sliding member. There is a known structure in which the plate mounting loads are connected and can be rotated around a support column. Furthermore, in Japanese Patent Application Laid-open No. 60-33140, a support is similarly set up on the floor surface, a frame is pivoted to the support in a horizontally rotatable manner via arm rods, and a lift cylinder provided on the box frame is installed. A tube is provided within the box frame so that it can be raised and lowered, and a cargo receiving stand is attached to the cylinder.

Problems to be Solved by the Invention In the conventional techniques disclosed in Japanese Utility Model Publication No. 58-4890 and Japanese Unexamined Patent Application Publication No. 60-33140, the device occupies the floor surface and becomes an obstacle to loading and unloading.

This idea eliminates the waste of installation space,
It can be installed outside the vehicle, and it also stabilizes the loading platform.
The purpose of this invention is to provide a load lifting and lowering device that lifts and lowers safely.

Means for Solving the Problems Brackets are provided above and below, separated by a required distance, on the inside or outside of one side wall facing the rear door opening of a van-type vehicle, and the base end of the swing frame is pivotally attached to this bracket. A gate-shaped hollow column is attached to the swing frame, the vertical portions of which are separated from each other to the left and right, and the spanning portion is connected to the upper end of the column.Elevating and lowering frames are installed inside each of these portal-shaped hollow columns, and each of the opposing edges is vertically connected to the vertical section. They are made to protrude outward from slots provided on the opposing surfaces of the opposing parts, and a band-shaped support plate is connected to each protruding end to form an elevating frame with a T-shaped cross section, and at the lower end of each elevating frame. A folding platform capable of standing and storing is connected along the vertical part, and the upper end of each opposite lifting frame is operated in conjunction with a cylinder housed in a cylinder box attached along the base end side of the swing arm. A cargo lifting device for a vehicle is characterized in that it is independently connected to a book chain.

Function The swing frame can be rotated between a stored state and a used state around a bracket installed on one side wall of the vehicle, and can be installed outside the opening so that it does not block the floor surface inside the vehicle interior. There is no such thing. In addition, since the gate-shaped hollow column consists of a vertical section separated from left and right and a span section connected to the upper end of the vertical section, an elevating frame is installed inside each of the vertical sections, and one end of each of the two chains is attached to the internal elevating frame. The other ends of the two chains are attached to a cylinder box installed along the base end of the swing frame, and the cylinder box is connected to the cylinder inside the cylinder box, so one cylinder can connect two chains. Even if one of the chains breaks, the other chain can still be used to raise and lower the vehicle, ensuring safety.

Embodiments The embodiments shown in the drawings will be explained below.
FIG. 1 shows a case where brackets 5a and 5b are attached to the inside of one side wall facing the opening/closing opening 3 of the rear door 2 of a van-type vehicle 1, which connects the base of the swing frame 4 to which the lifting device main body A is attached. FIG. 2 is an illustrative view in which brackets 5a and 5b connecting the bases of the swing frame 4 are provided on the outside of one side wall facing the door opening 3. As shown in FIG.

The lifting device main body A is provided by a portal-shaped hollow column consisting of hollow column-shaped vertical sections 6a, 6b spaced apart from side to side, and a span section 7 connecting the upper ends of the vertical sections 6a, 6b. Elevating and lowering frames 8a and 8b are installed inside as shown in FIG. Opposite edges 8a1, 8b1 of lifted/lowered frames 8a, 8b
are protruded, and each protruding edge is provided with a band-shaped support plate 10a,
10b are welded and connected and have a T-shaped cross section.

Rollers 11a1, 11a2, and 11 are spaced apart vertically and horizontally in the upper halves of the lifting frames 8a, 8b, and are connected and rotated on the inner wall surfaces of the vertical portions 6a, 6b.
b1 and 11b2 are supported in pairs in the front and rear, and two
The main chains 12a and 12b are connected independently, and one of the chains 12a is connected to the guide rollers 13 and 1.
4, the other chain 12b is guided by a guide roller 15 to a cylinder box 16 provided on the base end side of the swing arm, and the other end of each chain 12b is connected to the inner wall of the cylinder box. It is stuck to. A cylinder 17 is disposed in this cylinder box 16, and operating rollers 19a and 19b provided at the tip of a piston rod 18 that moves up and down from its lower end are connected to the chain 12a,
12b, and when the piston rod 18 is pushed downward, the respective chains 12a, 1
2b into the cylinder box 16, and the lifting frames 8a, 8b are raised. When the hydraulic valve (not shown) of cylinder 17 is released, the load applied to the lifting frame is
2a, 12b to the piston rod 18, which is pushed back to extend the chains 12a, 12b, and the elevating frames 8a, 8b to descend.

One side end of a base 20 of platform B is foldably connected to the lower ends of the opposite elevating frames 8a and 8b, and an auxiliary base plate 21 is foldably connected to the rear edge of this base 20 on the base 20. There's something I did.

Hydraulic piping connected to the cylinder 17 is not shown, but it passes from the cylinder 17 through the hollow part of the swing frame 4 and connects to the power unit attached to the vehicle 1 via rotatable joints provided at the hinges of the brackets 5a and 5b. It is connected to.

Since the present invention is constructed as described above, when unloading the luggage of the vehicle 1 using the lifting device or loading the vehicle 1, the rear door 2 is opened and then swung manually as shown in the figure. frame 4
is opened outward, and the lifting device main body A attached to this swing frame 4 is moved to the outside of the rear door 2 of the vehicle body 1 as shown in FIG. Auxiliary base plate 2
Expand 1. When unloading cargo in this manner, the cargo inside the vehicle 1 is transferred onto the platform B which is being expanded, and then the lifting frames 8a, 8b are lowered by the actuating device of the cylinder 17.

Conversely, when loading into the vehicle 1, the lifting frames 8a, 8b are lowered to the floor or the ground, the cargo is placed on the platform B, and the lifting frames 8a, 8b are moved again to the cylinder 17. It is raised to a required position by operation, and the loaded cargo is transferred and loaded into the vehicle 1. In this case, if necessary, a span plate or the like may be placed between the platform B and the inside of the vehicle 1 as shown by the chain line in Figure 1, but this may be used depending on the weight of the cargo. It's not necessarily necessary.

Effects As described above, in the present invention, the lifting device is installed on the swing frame and placed to one side of the opening of the rear door of the vehicle, so when it is not in use, it can be folded and stored inside the door. When in use, by opening the door, the lift device itself can be pulled out to the outside of the door opening at the rear of the vehicle as described above, and the platform is a part of the door opening. Because it is installed close to one side, leaving the door open, it is not necessary to use the lifting device completely for loading and unloading the luggage, and the lifting device is used for lightweight parcels for home delivery. It is common practice to take it out directly from the door opening without having to do so.

In particular, as in the present invention, the swing frame can be rotated between the retracted state and the used state around a bracket provided on one side wall of the vehicle, and can be installed outside the opening, allowing the swing frame to cover the floor surface of the vehicle interior. It is something that cannot be blocked.

In addition, since the portal-shaped hollow column of the lifting device body consists of a vertical section spaced apart from side to side and a spanning section connected to the upper end of the vertical section, the lifting frame is installed inside each of the sections.
One end of each of the two chains is connected to the interior lifting frame, and the other end of the two chains is attached to a cylinder box installed along the base end side of the swing frame, and the interior is attached to the cylinder box. Since the chain is connected to a cylinder, one cylinder can operate two chains, and even if one of them breaks, the other chain can be used to raise and lower the chain, ensuring safety. It is.

Therefore, the present invention is extremely beneficial as an elevating device for delivery vehicles that carry a wide variety of small packages.

[Brief explanation of the drawing]

The drawings show the embodiments of the present invention, and the drawings show the first embodiment.
2 and 2 are explanatory diagrams illustrating cases in which the bracket for connecting the swing frame is provided on the inside of the side wall facing the door opening at the rear of the vehicle, and the case in which it is provided on the outside. FIG. 3 is a front view showing the main body of the elevating device in cross section, and FIG. 4 is a schematic explanatory diagram of the chain device that connects the elevating frame and the cylinder. 1...Vehicle, 2...Rear door, 3...Opening/closing door,
4...Swing frame, 5a, 5b...Bracket, 6a, 6b...Vertical section, 7...Spanning section, 8
a, 8b... Lifting frame, 8a1, 8b1...
Opposing edges, 9a, 9b...Slot holes, 10a, 10b...
...Support plate, 11a1, 11a2...Roller, 11b
1, 11b2...Roller, 12a, 12b...Chain, 13, 14, 15...Guide roller, 16
...Cylinder box, 17...Cylinder, 18
... Piston rod, 19a, 19b ... Operation roller, 20 ... Base, 21 ... Auxiliary base plate, A ...
Lifting device body, B...Platform.

Claims (1)

[Scope of utility model registration request] On the inside or outside of one side wall facing the rear door opening of a van-type vehicle, brackets are provided above and below, separated by a required distance, and the base end of the swing frame is pivoted to this bracket. are spaced apart from each other on the left and right, and a gate-shaped hollow support is attached to the upper end of which the spanning portion is connected, a lifting frame is installed inside each of these portal-shaped hollow supports, and each of the opposing edges is provided on the opposite surface of the vertical portion. A belt-like supporting plate is connected to each projecting end to form an elevating frame with a T-shaped cross section, and an elevating frame that extends along the vertical portion at the lower end of each elevating frame is The retractable folding platform is connected, and the upper end of each opposite lifting frame is independently connected to two chains that operate in conjunction with cylinders housed in cylinder boxes mounted along the proximal end of the swing arm. A load lifting device for a vehicle, characterized in that: