KR20040049030A - Opening and closing apparatus of cargo gate for truck - Google Patents

Abstract

PURPOSE: A gate opening and closing device for a loading compartment of a truck is provided to prevent damage of a hinge or a vehicle body by restricting the hinge from being bumped into the vehicle body in opening the gate and forming a two-node link having a gas spring in the loading compartment. CONSTITUTION: A gate(300) is combined with a load rest(200) by a hinge, and turned to be opened and closed. A two-node link(100) is additionally formed in the loading compartment of the truck, and composed of a gate side link(110) combined with the inside of the gate by the hinge, a vehicle body side link(120) combined with the inside of the load rest by the hinge and composed of a gas spring(121) and a middle link(130) combined with the gate side link and the vehicle body side link by the hinge and turned and supported in the load rest.

Description

Opening and closing apparatus of cargo gate for truck}

The present invention relates to a loading box gate opening and closing device of a freight vehicle, and in particular, an apparatus for easily opening and closing the gate of the loading box by additionally applying a two-section link provided with a gas spring to the loading of the freight vehicle, the gate is open The present invention relates to a device capable of preventing collision with the vehicle body in advance, thereby reducing damage to the hinge and the vehicle body, as well as easily opening and closing the gate with a small force, thereby improving the convenience of the operator and the merchandise of the vehicle.

In general, a freight vehicle for the purpose of transporting cargo is hinged to the road restraint in order to facilitate the loading of the cargo and to prevent the loaded cargo from falling out of the loading box while driving.

The gate provided in the cargo box of such a freight vehicle is being developed to secure sufficient durability with the protection of the loaded cargo.

However, such a common cargo box has a disadvantage that the weight of the gate is so heavy that the gate hits the car body when the gate is opened and closed, and thus the direct damage occurs at these parts, and the hinge, which is a connecting part, is also easily damaged. Is a frequent occurrence.

Therefore, various opening and closing devices have been developed for easily opening and closing the gate with respect to the loading box of the freight vehicle.

1 is a perspective view showing a loading box gate opening and closing device of a conventional freight vehicle, and FIG. 2 is a cross-sectional view showing a loading box gate opening and closing device of a conventional freight vehicle.

As shown in FIGS. 1 and 2, a loading box gate opening and closing device of a conventional freight vehicle, which is disclosed in Korean Utility Model Publication No. 94-7599, has a bracket 2 installed at a vehicle body 1 and a lower end thereof having the bracket 2. A first link 3 rotatably mounted on the first link 3, a second link 4 having one end rotatably connected to the first link 3, and the other end of the second link 4 rotated at an intermediate portion thereof. A third link 5 connected to the bracket 2 and rotatably connected to the other end of the bracket 2, and a fourth link 6 and a gate of which one end is rotatably connected to the other end of the third link 5; 7 is installed in the connector (8) rotatably connected to the other end of the fourth link (6), cylindrical spring case (9) installed on the bracket (2), compression built in the spring case (9) Spring 10, the tip is rotatably connected to the bent hole (3a) of the first link (3) and the spiral is formed at the rear end The center shaft is formed to move along the center of the spring case (9) and the compression spring (10), and to move along the control shaft (11), the compression spring (10) It consists of the pressure plate 12 provided in the adjustment shaft 11 by the nut 13 so that the initial pressure may be applied.

As shown in FIGS. 1 and 2, in the conventional cargo box gate opening and closing device of the conventional freight vehicle configured as described above, the first link 3, the second link 4, and the first link 3 are opened as the gate 7 is opened and closed. The third link (5) and the fourth link (6) in conjunction with the compression spring (10) located in the spring case 9 is deformed, thereby allowing the operator to smoothly open and close the gate (7).

3 is a perspective view showing another embodiment of the loading box gate opening and closing device of a conventional freight vehicle, and another embodiment of the loading box gate opening and closing device of a conventional freight vehicle, which is Korean Patent Publication No. 2001-66547. As shown in Fig. 3, the flow path switching solenoid valve installed between the oil pump and the steering gear box of the power steering device and the side gate 14 of the loading box 17 are connected to the switching port of the flow path switching solenoid valve. A hydraulic cylinder 16 having both ends supported on the front gate 15, and a control unit and a control switch connected to the flow path switching solenoid valve to control the switching thereof.

Another embodiment of the loading box gate opening and closing device of a conventional freight vehicle configured as described above is, as shown in Figure 3, the left and right side gate 14 of the loading box 17 to the hydraulic oil pressurized to the oil pump of the power steering device By selectively opening the hydraulic cylinder 16 to be supplied and expanded, the side gate 14 is automatically opened by the hydraulic cylinder 16 supported by the front gate 15 when loading and unloading the cargo.

However, as shown in Figs. 1 and 2, the conventional cargo box gate opening and closing device of the cargo vehicle is not only complicated in structure but also protrudes outward from both sides of the cargo gate so that the width of the vehicle is widened. There was a technical problem that risk would increase.

In addition, as shown in FIG. 3, another embodiment of the loading box gate opening and closing device of a conventional freight vehicle also increases the installation cost as well as the structure of the operating device for controlling the hydraulic supply line. There is a technical problem that the opening angle of the gate is limited because the gate is directly connected to the gate.

The present invention is to solve the above problems, by additionally applying a two-section link having a gas spring to the loading of the cargo vehicle, to prevent damage to the hinge and the vehicle body by preventing the collision with the vehicle body while the gate is open. In addition, it is possible to easily open and close the gate with a small force to provide a load box gate opening and closing device of the cargo vehicle to improve the convenience of the operator and the merchandise of the vehicle.

The present invention in the loading of the cargo vehicle consisting of a gate that is hinged to the roadrest is opened and closed by rotating at a predetermined angle, the gate side link hinged to one end of the inside of the gate, and one side inside the roadrest The hinge is fastened to the body side link provided with a gas spring at the end of the hinge, and the center link is hinged at both ends of the gate side link and the body side link, respectively, and the middle link is supported so that the stop is rotatable inside the road rest. A two-link is achieved by further configuration.

1 is a perspective view showing a loading box gate opening and closing device of a conventional freight vehicle,

2 is a cross-sectional view showing a loading box gate opening and closing device of a conventional freight vehicle;

Figure 3 is another embodiment of the loading box gate opening and closing device of a conventional freight vehicle

Perspective view,

4 is a perspective view showing a storage box gate opening and closing device of a freight vehicle of the present invention;

5 to 7 is a loading box gate opening and closing device of the freight vehicle of the present invention

Back view showing the action,

8 is another embodiment of the loading box gate opening and closing device of the freight vehicle of the present invention

The perspective view shown.

<Explanation of symbols for the main parts of the drawings>

100: section 2 link 110: gate side link

120: body side link 121: gas spring

130: central link 200: road rest

300: gate

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view showing a storage box gate opening and closing device of the freight vehicle of the present invention, Figure 5 to Figure 7 is a rear view showing the operation of the storage box gate opening and closing device of the freight vehicle of the present invention.

As shown in Figures 4 to 7, the loading box gate opening and closing device of the cargo vehicle of the present invention is hinged to the loadrest 200 in the loading box of the cargo vehicle consisting of a gate 300 that is opened and closed by rotating at an angle. One side end hinged to one side of the gate 300 inside the gate 300, and one side end hinged to the inside of the loadrest 200, the gas spring 121 is provided in the suspension 120 and both ends are hinged to the gate side link 110 and the vehicle body side link 120, respectively, and at the same time, the middle link 130 is supported so that the suspension is rotatable inside the loadrest 200. It is a basic feature of the technical that the two-section link 100 is made of an additional configuration.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 4 to 7.

As shown in FIG. 4, the loading box gate opening / closing device of the cargo vehicle of the present invention configured as described above has a gate side link box (a gate side link box) provided with a gate 300 hinged to the load rest 200 and opened and closed. 110, the two-side link 100 consisting of the body side link 120, the central link 130 is further configured.

At this time, the two-section link 100 is connected to the gate side link 110 and the vehicle body side link 120 at both ends of the central link 130 that is rotatably supported inside the load rest 200, The gate side link 110 and the vehicle body side link 120 are hinged to the gate 300 and the load rest 200, respectively.

In addition, the gas spring 121 is provided at the end of the vehicle body side link 120 so that the vehicle body side link 120 is extended or contracted to maintain a constant length.

Referring to Figures 5 to 7 an operation example of the loading box gate opening and closing device of the freight vehicle of the present invention as follows.

First, as shown in FIG. 5, in the state in which the gate 300 is closed, the gas spring 121 provided in the vehicle side link 120 is fully extended, and no reaction force is applied to the gate 300. Only the force is enough to prevent the gate 300 from being easily opened.

Subsequently, when loading or unloading various cargoes in a loading box, after releasing a not shown locking device for fixing the gate 300 in a vertical state, as shown in FIG. 6, the gate 300 is opened. When the worker opens, the moment is increased by the weight of the gate 300 as the gate 300 is opened, resulting in a greater rotational force of the gate 300.

At the same time, the gas spring 121 provided in the vehicle side link 120 is gradually compressed to increase the reaction force, and also to increase the action distance of the reaction force.

Therefore, as shown in FIG. 7, the rotational force of the gate 300 is offset by being accumulated in the gas spring 121 so that the gate 300 is opened smoothly.

In addition, when the gate 300 is fully open, the gas spring 121 is compressed to the maximum, but the reaction distance of the reaction force is reduced, so that the gate 300 is not closed by itself.

However, when the worker lifts the gate 300 to close the gate 300, the gate 300 acts in a direction in which the reaction force of the gas spring 121 that has been compressed raises the gate 300. As a result, the operator can easily close the gate 300 with little force.

Therefore, the operator can easily open and close the gate 300 provided in the loading box of the cargo vehicle through the two-section link 100 having the gas spring 121, and the gate 300 collides with the vehicle body and is generated. It is possible to prevent various damages in advance.

Since the gas spring 121 of the body-side link 120 operating as described above is able to adjust the spring constant according to the pressure of the gas filled therein, the operator can easily adjust the opening and closing force of the gate 300 desired. Not only that, but also when the weight of the gate 300 is changed, it is also possible to easily respond to this.

FIG. 8 is a perspective view showing another embodiment of the loading box gate opening and closing device of the freight vehicle of the present invention, and another embodiment of the loading box gate opening and closing device of the cargo vehicle of the present invention is shown in FIG. 8. In the loading of the freight vehicle consisting of a gate 300 hinged to the 200 is opened and closed by rotating at a predetermined angle, the gate side link 110 hinged to one side of the outer side of the gate 300, and One side end is hinged to the outside of the road rest 200, the gas body side link 120 is provided with a gas spring 121 at the stop, and both ends are hinged to the gate side link 110 and the body side link 120, respectively At the same time, the two-link 100 is further composed of a central link 130 is supported so that the suspension is rotatable on the outside of the road rest 200.

As shown in FIG. 8, another embodiment of the present invention configured as described above includes a load rest 200 and a gate 300 provided with a two-link 100 having a gas spring 121 installed in a cargo vehicle. It is fastened to each outer side of the, and while having the same operation effect as the above-mentioned, there exists an advantage that a loading box can be used widely.

Therefore, the loading box gate opening and closing device of the cargo vehicle of the present invention, by additionally applying a two-section link 100 having a gas spring 121 of a simple structure, the operator can easily open and close the heavy gate 300 as well. This can prevent damage to the body.

In addition, it is possible to change the mounting position of the two-section link 100 can be changed in various designs of the loading box for the cargo vehicle, by adjusting the pressure of the gas filled in the gas spring 121 of the gate 300 There is an advantage that the opening and closing force can be set appropriately.

The present invention as described above by applying a two-section link with a gas spring to the loading of the cargo vehicle, it is possible to reduce the damage of the hinge and the vehicle body by preventing the collision with the vehicle body while the gate is open, as well as the gate It is an invention that can be easily opened and closed with a small force to improve the convenience of the operator and the merchandise of the vehicle.

Claims (3)

In the loading box of the freight vehicle consisting of a gate which is hinged to the road rest and opened and closed by rotating at an angle, A gate side link hinged at one end of the gate, a body side link hinged at one end of the rodrest, and a gas spring provided at a stop, and both ends of the gate link and the body link At the same time each hinge is fastened, the loading box gate opening and closing device of the cargo vehicle, characterized in that the two-link link consisting of a central link is supported so that the suspension is rotatable inside the roadrest. In the loading box of the freight vehicle consisting of a gate which is hinged to the road rest and opened and closed by rotating at an angle, A gate side link having one side hinged to an outer side of the gate, a body side link having one side hinged to an outer side of the rodrest, and provided with a gas spring at an interruption, and both ends of the gate side link and a body side link At the same time each hinge is fastened, the loading box gate opening and closing device of the cargo vehicle, characterized in that the two-link link consisting of a central link is supported so that the suspension is rotatable on the outside of the road rest. [3] The gate box opening and closing device of a cargo vehicle according to claim 1 or 2, wherein the gas spring of the vehicle-side link is capable of adjusting a spring constant according to the pressure of the gas filled therein.