KR200374398Y1 - Locking device for tailgate of dump truck - Google Patents

Abstract

The present invention is designed to prevent accidental rear door opening that may occur during operation by reinforcing a large dump truck rear door locking device, which is formed to protrude from the side of the frame of the dump truck and the bottom plate A body placed on the upper surface of the dump truck, which is pushed by a pressing plate formed at the bottom of the loading box of the dump truck and extends to one end of the pressing portion. When the pressing portion is pressed, the body rotates so that the supporting portion rotates the gate hook from below. It is formed at a predetermined position of the body and the support portion having a curved shape so as to support the body, and when the body is placed horizontally, the body comprising a rotating hole formed at a predetermined position toward the pressing portion at the center of gravity so that the support portion is lowered The body to rotate the rotating ball as the axis of rotation Body is configured to rotate the bottom plate lies.

Description

LOCKING DEVICE FOR TAILGATE OF DUMP TRUCK}

In general, a dump truck is a vehicle mainly used in civil engineering and construction sites, and as a means for convenience of work, the rear door of the loading box is automatically opened when the load is discharged. Such dump trucks are restricted by law so that a load of more than 10 tons per one axis should not be applied in the case of a very large dump truck. However, even in this case, the load distribution should be appropriate to ensure that the load can be transported without breaking the regulations. However, if the load is not properly distributed or if the load is exceeded, the accidental rear door opening may occur during operation, which may cause a large accident.

1 is a perspective view of a loading box conventionally used. As shown in FIG. 1, the conventional stacker is composed of a gate hook connected by a link and a spring case, turnbuckle, return spring, etc. installed in the link so that the gate hook connected to the link when the vehicle stacker is dumped is separated from the hinge of the rear door. It is supposed to be. When not dumped, the gate hooks hold the back doors open. However, when overloaded or not properly distributed, there is a possibility that the load may pour out during operation and cause a large accident if the gate hook cannot withstand the load applied to the rear door by the loaded load.

The present invention aims to provide an auxiliary locking device that makes the loading box easy to open by supplementing the disadvantages of the existing heavy truck's rear door locking device, and also raises the loading box without additional power in operating the device according to the present invention. The purpose of the lock is to operate automatically when getting off, so that any load can be loaded, so that the back door of the loading box is strongly supported to prevent any accidents that may occur.

1 is a view showing a lock structure of a loading box used in the related art.

Figure 2 is a view showing the loading compartment rear door auxiliary locking device according to the present invention.

Figures 3 and 4 are views showing a state in which the loading compartment rear door auxiliary lock device according to the present invention. Figures 5 and 6 are views showing a state in which the loading compartment tail door auxiliary locking device according to the present invention is mounted.

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

11: tailgate 12: gate hook

13: return spring 14: link

21: pressing part 22: supporting part

23: Bolt (rotary ball) 24: Bottom plate

31: press

In order to achieve the above object, the present invention provides a dump truck loading box tailgate auxiliary lock device, the auxiliary lock device,

A bottom plate protruding from the side surface of the frame of the dump truck;

A body placed on the top of the bottom plate, the linear pressing portion is pressed by the pressing plate formed on the bottom of the loading box of the dump truck and extends to one end of the pressing portion, when the pressing portion is pressed the body is rotated so that the supporting portion to the gate hook It is formed at a predetermined position of the support portion and the body having a curved shape so as to support from the bottom, when the body is placed horizontally comprises a rotary ball formed at a predetermined position toward the pressing portion in the center of gravity so as to lower the support portion A body; The body is placed on the base plate and rotated so that the body rotates using the rotating ball as a rotation axis.

The rotating hole is located at a point intermediate in the longitudinal direction of the body, the center of gravity of the body may be at a point that is 1/3 of the pressing side in the overall length.

A pair of safety plates are formed at the upper end of the bottom plate so that the body is inserted between the safety plates so that they do not escape to both sides even when rotating.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Figure 2 is a view showing the dump truck loading box tailgate auxiliary locking device according to the present invention. Dump truck loading box rear door auxiliary locking device according to the present invention is composed of a pressing portion 21 and the supporting portion 22 so that the body rotates when the pressing portion 21 is pressed so that the supporting portion 22 can rise upwards. The rotating hole 23 is formed in the center. This body is formed on the bottom plate formed on both sides of the frame on the side of the frame portion of the dump truck. The body also acts as an auxiliary lock on both sides of the tailgate of the dump truck. Since the center of gravity of the body is on the supporting part 22 (that is, the rotating ball is not the center of gravity and is located on the supporting part 22 rather than the rotating ball), it is not normally horizontal when placed horizontally. 22) goes down a little further. When the pressing part 21 is pressed, the supporting part 22 which is lowered to the bottom is made to move upward.

When you get off the load in the loading box, the loading box is heard. In this case, the pressing plate 31 formed at both lower sides of the loading box is also heard, so that the pressing portion 21 of the body is not pressed. Therefore, in this case, the supporting portion 22 is lowered downward. However, when loading the load in the loading box and the loading box is lowered, the pressing plate 31 presses the pressing portion 21 of the body while the body rotates the rotary hole 23 as the rotating shaft while the supporting portion is upward. Will come up. When the supporting portion 22 is raised upward, the supporting portion 22 can support the bottom portion of the gate hook 12 from below. Since the supporting part 22 supports the gate hook 12 by the weight of the loaded load and the load box, the rear door cannot be easily opened by the weight of the load box, which is much larger than fixing the rear door by hooks. It can be reinforced by pressing the rear door of the loading box.

When the load of the loading box to get off, as the pressing plate 31 is raised, the supporting portion 22 is lowered by the weight, thereby not supporting the bottom part of the gate hook, and the loading rear door can be easily opened.

These rear door locking aids can be strengthened to withstand large loads by varying the thickness or material of the body.

Figure 3 is a view showing a state in which the loading lock rear door auxiliary lock device according to the present invention is mounted. When the loading box is moved up, the gate hook is lifted upward, and the rear door of the loading box is opened, and the pressing plate 31 at the bottom of the loading box is also raised upward so that the pressing part 21 is not pressed so that the supporting part 22 is lowered. It goes down. The body including the pressing portion 21 and the supporting portion 22 is placed on the bottom plate formed at the lower end of the dump truck.

Figure 4 is a view showing a state in which the loading lock rear door auxiliary lock device according to the present invention is a view showing a state in which the auxiliary locking device according to the present invention supports the gate hook. The presser part 31 presses the presser part 21, and the support part 22 raises up and supports the gate hook. In this case, it can be seen that the body is easily rotated and inserted and rotated between the safety plates formed on the upper plate so as not to escape from the outside. FIG. 5 is a view showing a state in which a loading lock rear door auxiliary locking device according to the present invention is mounted. to be. This also, when the loading box is raised up, the gate hook is raised upwards, the rear door of the loading box is opened, and the pressing plate 31 at the bottom of the loading box is also raised upwards so that the support part 22 is not pressed. It goes down to the bottom. 5 differs from the embodiment of FIG. 3 in the gate hook portion of the truck. Gate hooks are used in various ways depending on the size and type of the truck, but in the case of trucks of 15 tons or less, the gate hooks of the shape shown in Figs. 3 and 4 are used. A gate hook shaped like the one shown is used. Regardless of the shape of the gate hook, it is possible to use the device according to the present invention. Regardless of the shape of the gate hook, when the pressing plate presses the pressing part 21, the supporting part 22 is raised to the upper side and the gate hook is opened. When the pressing plate is raised upward, the support part 22 descends to the bottom to release the lock. FIG. 6 is a view illustrating a state in which a loading lock rear door auxiliary lock device is mounted according to the present invention. Different from the drawing is the direction of the gate hook.

Even if a large dump truck carries loads with an excessive speed or excessive load, the present invention as described above prevents the rear door from being opened, thereby preventing various accidents that may occur due to spilling of loads on the road during operation. By doing so, it helps to drive safely.

In addition, the reinforcement of the rear door of the loading box by the weight of the load loaded in the loading box without using the other power unit is more effective than the reinforcement of the rear door of the loading box using other reinforcement.

Claims (3)

Auxiliary lock on the tailgate of the dump truck A bottom plate protruding from the side surface of the frame of the dump truck; A body placed on the upper surface of the base plate, The linear pressing part pressed by the pressing plate formed on the bottom of the loading box of the dump truck A support portion extending in one end of the pressing portion and having a curved shape so that the body rotates when the pressing portion is pressed so that the supporting portion supports the gate hook from below; It is formed in a predetermined position of the body, the body including a rotary hole formed in a predetermined position toward the pressing portion in the center of gravity so that the support portion is lowered when the body is placed horizontally; The body is rotated by placing the body on the base plate so that the body is rotated by using the rotating ball as a rotation axis, Dump truck loading door tailgate lock. The method of claim 1, The rotation hole is located at a point intermediate in the longitudinal direction of the body, characterized in that the center of gravity of the body is at a point that is 1/3 of the pressing side in the entire length, Dump truck loading door tailgate lock. According to claim 1, characterized in that the upper end of the bottom plate is formed in a pair of safety plate so that the body is inserted between the safety plate so as not to escape to both sides even when rotating, Dump truck loading door tailgate lock.