JPH0372487B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for loading and unloading cargo using a forklift or the like by opening the sides of the top of a truck.
Concerning a truck hood that can temporarily lift the top.

[Conventional technology]

The inventor of the present application has proposed an opening/closing drive device using an electric motor or the like to drive the sides of a canopy, which is made up of a plurality of frames made of pipe members connected so as to be vertically rotatable and covered with a covering sheet. Therefore, we proposed a truck hood opening/closing mechanism that automatically opens by folding it up and down and lifting it up (see Japanese Patent Laid-Open No. 60-236831).

This hood is extremely lightweight, and at the same time, unlike the hood shown in Utility Model Application Publication No. 58-136819, which lifts the sides of the hood outward, there is very little space for opening and closing the hood. It has the advantage of being easy to use.

However, these types of canopies that open only the sides of the canopy have a common drawback in that they cannot fully load cargo into the truck bed.

In other words, the top of a truck is regulated to a predetermined height in accordance with legal limits, and within this regulated range it should be possible to load cargo so full that it can be supported on the top of the top. When using a lift to load or unload cargo onto a loading platform, there is a space between the top of the canopy and the top of the cargo to prevent the cargo lifted by the forklift from supporting the top of the canopy. At least enough space must be provided to allow the forks of the forklift to move up and down, and a normal canopy has an arched canopy at the top, and the frame for attaching this canopy is horizontal. Because of this, it is necessary to load and unload cargo in such a way that the upper end of the cargo lifted by a forklift does not hit this frame. A wasted space corresponding to the height up to the upper end of the canopy attached to the canopy is formed, which has the disadvantage that the loading capacity of the truck is reduced accordingly.

In addition, in order to solve this problem, the top of the canopy is moved up and down by a lifting device using a hydraulic cylinder or an air cylinder, so that the cargo can be easily loaded and unloaded using a forklift or the like. A structure that does not support the top has been proposed (Jekkoaki
(Refer to Publication No. 57-21773) However, in order to drive a hydraulic cylinder or an air cylinder, complicated equipment such as a pump, a directional control valve, a flow rate adjustment valve, a reservoir tank, etc. is required, and the equipment cost increases. I was holding it.

Furthermore, when a hydraulic cylinder is used as a lifting device, there is a problem in that the weight of the entire device increases, and the permissible loading weight of a truck with a weight limit is significantly reduced.

On the other hand, a structure in which the top is raised and lowered using a manual winch-type rope winding mechanism has also been proposed (see Japanese Patent Application Laid-open No. 77323/1983).

Although this rope winding mechanism has the advantage of low equipment costs, it is manual and requires a lot of labor on the part of the operator, making it particularly difficult to apply to canopies equipped with the electric canopy opening/closing mechanism mentioned above. In some cases, the drawback was that a considerable amount of force was required to raise the top, which required a great deal of effort.

In addition, some of the rope winding drum, pulley, rope, etc. of the rope winding mechanism are exposed to the outside of the canopy, so they are easily damaged by exposure to wind and rain. Due to the large force applied, there was a problem in that the rope was prone to wear due to repeated lifting and lowering of the top.

Furthermore, this mechanism requires a long rope to be stretched in a complicated manner all the way under the floor of the loading platform.
There were also problems in that it was difficult to manufacture and maintenance and inspection was troublesome.

[Problem to be solved by the invention]

Therefore, the technical object of the present invention is to provide a truck top that can automatically open and close the top of the top by means of a simple structure, light weight, low equipment cost, and excellent durability. .

[Means to solve the problem]

In order to solve this problem, the present invention has a frame forming the top of the hood attached to the pillars provided at the four corners of the loading platform, and a frame body formed of a pipe member on the side of the hood. In a truck hood, the upper end of which is attached to the frame so as to be movable up and down, and the frame is lifted together with a cover sheet placed thereon to open and close the hood, the frame is lifted. An opening/closing device that opens the sides of the hood is integrally attached to the frame, and the frame is supported by sliding rods that are fitted into the upper part of each of the pillars so as to be able to slide up and down. Both ends of the chain, which is wound around a driving sprocket connected to an electric motor that is rotationally driven, are wound around a pair of driven sprockets that are arranged vertically adjacent to each other in the upper part of the column, and then the chains are connected to each sliding sprocket. The top of the hood can be raised and lowered by a chain transmission mechanism fixed to the upper and lower ends of the moving rod.

[Effect]

According to the present invention, first, the opening/closing device attached to the frame that forms the top of the hood is driven, and the frame body, which is attached to the frame so as to be movable up and down, is lifted up and down together with the cover sheet. When the sides of the canopy are opened and then the sliding rod that supports the frame attached to the support provided on the loading platform is moved upward by a chain transmission mechanism driven by an electric motor, the sides of the canopy are opened. In the open state, the top of the hood rises above a predetermined height limit.

In this state, cargo is loaded from the side of the truck bed using a forklift, etc. When the cargo is loaded to the maximum height limit, the electric motor is reversed and the sliding rod is moved downward. to return the top of the hood to its original height.

As a result, the cargo bed of the truck is loaded with enough cargo to support the top of the hood, and there is no wasted space within the hood.

Further, in the chain transmission mechanism according to the present invention, a driving sprocket is connected to an electric motor, and both ends of the chain wound around the sprocket are stretched over a pair of driven sprockets arranged in parallel adjacent to the upper part of a column. It has a simple structure in which it is fixed to the upper and lower ends of each sliding rod, and it is lightweight and the components are inexpensive, so the equipment cost is not as high as when using conventional hydraulic cylinders etc. Also, there is no problem in that the permissible loading weight of the truck is significantly reduced due to the increased weight.

In addition, the chain transmission mechanism can have all its components placed inside the canopy, and unlike conventional rope winding mechanisms, there are no exposed parts to the outside of the canopy, so there is no risk of damage to the mechanism parts due to exposure to wind and rain. It prevents this from happening and is highly durable.

In particular, part of the chain of the chain transmission mechanism,
Since it can be stored inside the column and the sliding rod, the entire mechanism can be made compact, and the chain moves up and down within the column and the sliding rod by a predetermined length as the sliding rod moves up and down. Because it is a mechanism that moves the rope, there is no need to use unnecessarily long ropes like in conventional rope winding mechanisms, and it is easy to manufacture.
Maintenance and inspection are also easy.

Embodiments Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.

FIG. 1 is a perspective view of the top of a truck according to the present invention, seen from the rear, and FIG. 2 is a perspective view of the main parts thereof, seen from the front of the loading platform.

In the figure, reference numeral 1 is the loading platform of the truck, and the torii gate 3 and side tilts 4 and 4 surround the floorboard 2 on all sides.
A rear tilt holder 5 is provided, and a pair of tilt support posts 6, 6 are respectively erected at the rear corners.

As shown in FIG. 2, the torii gate 3 is provided with columns 7, 7 made of, for example, C-shaped channel steel at both left and right ends thereof, and a horizontal rod 8 made of a square pipe or the like is installed between the columns 7, 7. A stainless steel plate 3a and a veneer plywood 3b are attached to its front and rear surfaces.

Reference numeral 9 denotes a rear frame framed in the shape of a gate at the rear of the loading platform 1, and includes columns 10, 10 made of C-shaped channel steel that are fitted and connected to the upper ends of the tilt-hanging columns 6, 6, respectively. , and a horizontal rod 11 installed horizontally between the supports 10 and 10.

Reference numeral 12 denotes a top frame forming the top HU of the canopy, which includes support columns 7,
It is supported by sliding rods 13, 13 and 14, 14 that are fitted into the upper portions of columns 10, 10 provided at both left and right ends of the rear frame 7 and the rear frame 9, respectively, so as to be vertically slidable.

Note that the sliding rods 13, 13 and 14, 14 are formed of channel steel material as shown.

The top frame 12 also includes horizontal bars 15a and 15b installed between the left and right sliding rods 13 and 13 and between the sliding rods 14 and 14, respectively, and the sliding rod 1 mentioned above.
Horizontal rods 16a and 16 installed between 3 and 14, respectively
b into a rectangular frame, and arch-shaped canopy bones 17, 17 are provided at a predetermined interval between the horizontal rods 16a and 16b.
... are arranged in parallel, and a waterproof covering sheet S is placed over them.

18 is a frame forming the side HS of the hood,
It consists of an upper frame 18U and a lower frame 18D formed of lightweight pipe members and arranged in a vertically foldable manner, and in the closed state, both left and right ends are in contact with the sides of the columns 7 and 10, respectively. At the same time, the upper end of the upper frame 18U is connected to the horizontal rod 16a or 16b.
It is mounted and supported by bearings 19 disposed at predetermined intervals along the side surface of the body so as to be movable up and down.

Reference numeral 20 denotes an opening/closing device that opens and closes the side HS of the top by vertically rotating the upper frame 18U (as shown in FIG. 2), and includes a top frame 12 that forms the top HU of the top.
An electric motor 21 is attached to both the left and right ends of the horizontal rod 15a and is driven to rotate in forward and reverse directions by a changeover switch (not shown) located, for example, inside the driver's seat.
The rotating arm 23 is fixed to the output shaft of the gearbox 22 of the motor 21, and the driven arm 24 is fixed to the end of the upper frame 18U.

The driven arm 24 is attached perpendicularly to the upper frame 18U, and has a long hole 24a bored in its longitudinal direction, and the tip of the rotating arm 23 is slidably engaged in the long hole 24a. There is.

Reference numeral 26 is a lifting device for raising and lowering the top frame 12 forming the top HU of the canopy, and is fixed at approximately the center of the horizontal rod 8 forming the torii gate 3 and the horizontal rod 11 forming the rear frame 9, respectively. The chain transmission mechanism 29 is driven by electric motors 27 and 28, which are rotated in forward and reverse directions by a predetermined changeover switch.

The chain transmission mechanism 29 includes a pair of chains 31, each of which is wound around a driving sprocket 30 driven by an electric motor 27 (or 28), and both ends of which are arranged vertically adjacent to each other on the upper part of the support column 7 (or 10). After being stretched over the driven sprockets 32 and 33 of the sliding rod 13 (or 14), they are fixed to the upper and lower ends of the sliding rod 13 (or 14), respectively.

Note that in order to move both the left and right sliding rods 13 and 13 (or 14 and 14) up and down by one electric motor 27 (or 28), one chain 31 is driven as shown in FIG. The chain 31 runs parallel to the sprocket 30, and the other chain 31 runs across the sprocket 30.

Then, by simultaneously starting the front and rear electric motors 27 and 28 and rotating each drive sprocket 30 in a fixed direction, each sliding rod 13, 13 and 14, 14 is slid upward via a chain 31. When the top frame 12 is raised while maintaining a parallel state, and the electric motors 27 and 28 are driven in reverse, the sliding rods 13, 13 and 14, 14 are slid downward, and the top frame 12 is lowered. It will be.

The above is an example of the structure of the hood according to the present invention, and its operation will be explained next.

When opening the side HS of the canopy and loading cargo using a forklift or the like, first remove the lower end of the cover sheet S from the hook fittings (not shown) fixed to the side tilt 4 and rear tilt 5. , the side tilter 4 on the cargo loading side is opened by removing its latch (not shown).

Next, turn on the changeover switch disposed inside the driver's seat or the like to drive the electric motor 21 of the opening/closing device 20 in the forward direction, rotate the rotating arm 23 by 180 degrees, and connect the frame 18 with the upper frame 18U. Fold it in half with the lower frame 18D and lift it upward to completely open the side HS of the hood.

If the horizontal rods 16a or 16b of the top frame 12 become an obstacle in this state, the lifting device 26
The electric motors 27 and 28 are started to rotate the drive sprocket 30, for example, in the counterclockwise direction as seen in FIG. 1, and the left and right chains 31, 31 are driven in the directions of arrows F and F, respectively. As a result, each sliding rod 13, 13 and 14, 14 is connected to the support 7, 7, respectively.
The top frame 12 forming the top HU of the hood is pushed up and raised.

Along with this, the side HS of the canopy, which has already been lifted upwards, is also raised together with the top HU, and the side HS of the canopy is opened above its normal height, allowing it to be loaded and unloaded using a forklift, etc. Since the cargo is not caught on the horizontal rods 16a, 16b, etc. forming the top HU of the canopy, the cargo can be loaded to the full height limit of the canopy.

In this way, when the loading and unloading work of cargo is completed, the electric motors 27 and 28 are first driven in reverse to slide the sliding rods 13, 13 and 14, 14 downward, and the top frame 12 is moved to the torii 3. and lower it to a position where it rests on the rear frame 9 and is supported, returning the top HU of the hood to its normal limit height.

Finally, the opening/closing device 20 is activated to extend and lower the upper frame 18U and lower frame 18D of the frame 18, and the side portions HS of the canopy are closed, thereby closing the entire canopy.

As described above, according to the present invention, the electric motor 2
The top HU of the canopy is lifted by a chain transmission mechanism 29 of a simple and inexpensive configuration driven by parts 7 and 28, and cargo can be loaded in the canopy to the full height limit without any gaps.

In particular, since the side portion HS of the canopy that is lifted together with the top portion HU of the canopy is formed of a lightweight frame 18 made of a pipe member, the driving source for lifting the top portion HU of the canopy is heavy and equipment costs are high. There is no need to use an expensive hydraulic cylinder device, and there is no problem that the allowable loading weight of trucks with weight restrictions is significantly reduced.

Furthermore, the horizontal bars 15a, 15b and 16a, 16b that constitute the top frame 12 as in the embodiment,
If the canopy frame 17 etc. are made of hollow pipe members or C-shaped channel steel, etc., and the top part HU of the canopy is also made lighter,
The electric motors 27 and 28 can be made smaller and lighter.

Further, the chain transmission mechanism 29 is connected to the chain 3
1, 31, the driving sprocket 30, and the driven sprockets 32, 33, etc., are all located inside the hood, and there are no exposed parts to the outside, so the mechanical parts will not be damaged by exposure to wind and rain. , has excellent durability.

Further, since a part of the chains 31, 31 is housed in each of the pillars 7, 7 and each sliding rod 13, 13, the entire mechanism can be made compact, and the chains 31, 31 are partially housed in each sliding rod 13, 13. Rod 1
As the ropes 3 and 13 are raised and lowered, they only move vertically within the respective supports 7 and 7 and the sliding rods 13 and 13. There is no need to use long ropes, and it is easy to manufacture and easy to maintain and inspect.

Furthermore, the present invention provides an arrangement in which the top frame 12 is connected to the torii 3 and the rear frame 9 with respect to the existing truck top.
At the same time as separating it from the column 1 of the top frame 9
Sliding rods 13, 13 and 14 that fit into 0, 10,
It has the advantage that it can be applied by simply making a modification such as attaching 14.

Embodiment FIG. 3 is a perspective view showing another embodiment of the present invention.

Note that parts that overlap with those in FIGS. 1 and 2 are given the same reference numerals and detailed explanations will be omitted.

In this example, the sliding rods 13 and 14 rotatably support the top frame 12, and the sliding rods on the left and right sides of the loading platform 1 can be selectively moved up and down, allowing cargo to be loaded. Only the side HS on the side that is to be unloaded can be left wide open.

For this reason, the upper ends of the sliding rods 13 and 14 on the right side in the figure are rotatably attached to the horizontal rods 15a and 15b of the top frame 12 via the support shafts 51, respectively.
The left sliding rods 13 and 14 are formed into an L-shape with their upper ends facing inside the top, and the support shafts 53 are inserted into long holes 52 drilled in the horizontal rods 15a and 15b of the top frame 12. It is rotatably attached through the Further, an elevating device 26 composed of a chain transmission mechanism 29 is connected to each sliding rod 13, 13 and 1.
They are arranged every 4 and 14, and can be driven separately or simultaneously on the left and right sides as necessary by a changeover switch arranged on the driver's seat or the like.

Therefore, for example, when only the left sliding rods 13 and 14 are extended as shown in FIG. can be lifted above the height of the canopy.

In this case, only the side on which cargo is loaded and unloaded can be raised and lowered, so when raising the top HU, a cover sheet is placed over the open side HS of the canopy and the side HS opposite to the side HS. There is no need to remove the lower end of S from the side tilt 4 and rear tilt 5,
This has the advantage that loading and unloading operations can be carried out extremely efficiently.

In addition, since the structure allows it to be opened on either the left or right side, it is possible to use a forklift or the like from either side, depending on the situation when loading and unloading cargo.
Highly versatile.

In addition, when driving the chain transmission mechanisms 29, 29... arranged for each of the sliding rods 13, 13 and 14, 14 all at once, the top HU of the hood is moved as in the first embodiment. It can also be lifted horizontally.

〔Effect of the invention〕

As described above, according to the present invention, the top of the canopy can be raised and lowered by a chain transmission mechanism driven by an electric motor, and cargo can be fully loaded to the extent that it is supported on the top of the canopy. This has the effect that no wasted space is created within the canopy, and since the chain transmission mechanism has an extremely simple configuration and is inexpensive, maintenance and inspection are easy and equipment costs are low. There is.

In addition, since the sides of the canopy are made of a lightweight frame made of pipe members, the sides and top can be lifted by a relatively small electric motor, making it possible to lift the canopy with a relatively small electric motor, unlike heavy hydraulic cylinder devices. Another advantage is that the permissible loading weight of the truck is not significantly reduced.

Furthermore, since all the constituent members of the chain transmission mechanism are disposed within the canopy, the mechanical parts are not damaged by exposure to wind and rain, resulting in high durability.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the truck hood according to the present invention as seen from the rear of the loading platform, Fig. 2 is a perspective view of the main parts thereof as seen from the front of the loading platform, and Fig. 3 is a loading platform showing another embodiment of the present invention. FIG. Explanation of the code, 1...carriage platform, 3...torii, 7...
Strut, 9... Rear frame, 10... Strut, HU
...Top of the hood, 12...Top frame, 13,1
4... Sliding rod, HS... Side part of the hood, 18... Frame,
S... cover sheet, 20... opening/closing device, 26... lifting device, 27, 28... electric motor, 29... chain transmission mechanism, 30... driving sprocket, 3
1... Chain, 32, 33... Driven sprocket.

Claims (1)

[Claims] 1. A frame 12 forming the top HU of the canopy is attached to the pillars 7 and 10 provided at the four corners of the loading platform 1, and a frame formed of a pipe member is attached to the side HS of the canopy. 18 is attached with its upper end movable up and down with respect to the frame 12, and the frame body 18
In a truck hood configured to open and close the hood by lifting U and 18D together with a cover sheet S placed thereon, an opening/closing device that lifts the frames 18U and 18D to open the side HS of the hood. 20 are integrally attached to the frame 12, and the frame 12 is fitted into the upper part of each of the columns 7, 10 so as to be vertically slidable;
A driving sprocket 30 connected to electric motors 27 and 28 supported by and driven to rotate in forward and reverse directions.
Both ends of the chain 31 wound around the support rods 7 and 10 are passed over a pair of driven sprockets 32 and 33 arranged vertically adjacent to each other, and then connected to the sliding rods 13 and 14, respectively. By means of a chain transmission mechanism 29 fixed to the upper and lower ends of the
A truck hood, characterized in that the top HU of the hood is movable up and down. 2. Each of the sliding rods 13, 14 is rotatably connected to the frame 12 forming the top HU of the top, and the chain transmission mechanism 29 is provided for each sliding rod 13, 14. Claim 1, wherein each chain transmission mechanism 29 selectively moves only the sliding rod on either the right side or the left side of the top up and down.
The hood of the truck mentioned in section. 3. Each of the sliding rods 13, 14 is formed into a groove shape,
2. A truck hood according to claim 1, wherein said chain 31 is disposed along the inside of said groove.