JPH0632181U - Loading platform opening and closing mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a loading platform opening / closing mechanism capable of smoothly supplying a load from the loading platform to the ground by opening the lid portion above the loading platform when the loading platform is tilted. With the goal. [Structure] An independent lid portion 1 is provided for a cargo bed. The upper part of the lid part 1 is supported by the arm 2. The arm 2 is pivotally supported on the cargo bed side portion 3. The arm 2 and the body frame 5 are connected by a connecting member 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a loading platform opening / closing mechanism for a transportation vehicle that can tilt a loading platform and supply a load to the ground.

[0002]

[Prior art]

 Generally, a carrier vehicle for tilting a cargo bed is used for carrying earth and sand at a civil engineering work site and a construction site, and a conventional cargo bed opening / closing mechanism has a lid part provided at a rear portion of the cargo bed. The upper end is supported by the rear end of the side of the cargo bed, and the upper end of the lid is used as a fulcrum to rotate, and when the cargo bed is tilted, the lid maintains the vertical state. The rear of the loading platform had an opening, and it was possible to supply the earth and sand loaded from the opening to the ground.

[0003]

[Problems to be solved by the device]

 However, in the above-described loading platform opening / closing mechanism, since the upper end of the lid provided at the rear of the loading platform is supported by the loading platform side, the openable range is limited to about the same as the area of the loading unit. In addition, the rear part of the bed lowers when the entire bed is tilted, so the lid is close to the ground surface, and the height of the earth and sand supplied to the ground instantly increases. This would obstruct the opening at the rear of the loading platform, hindering the subsequent supply of earth and sand.

Further, as described above, even if the opening is closed, if the entire loading platform is further tilted, the loaded earth and sand will flow down over the lid. Therefore, the earth and sand were to be supplied to an unscheduled position, and the earth and sand and the like had to be manually moved after that, which was very troublesome.

Further, as described above, the opening range of the lid is very narrow, and the earth and sand supplied from the opening to the ground must pass through such a narrow range. Even if it is good, it cannot be supplied at one time, and it cannot be supplied in a short time.If the load is wood chips, etc., the wood chips will be caught on the lid, etc. In some cases, we could not supply it.

The present invention has been made in view of the above points, and when the loading platform is tilted, by opening the lid portion above the loading platform, the loading platform opening / closing mechanism capable of smoothly supplying a load from the loading platform to the ground. The purpose is to provide.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention supports an upper portion of a lid portion provided on a cargo bed, enables the lid portion to rotate about the bearing portion, and raises and lowers the body frame vertically. A loading platform opening / closing mechanism for a transport vehicle that allows the front part of the loading platform to be raised and lowered by a device, and when the entire loading platform is tilted by raising the front part of the loading platform, the lid keeps the vertical state to open the rear of the loading platform. , The lid part is independent, the upper part of the lid part is supported by an arm, and the arm is rotatably supported on the side of the cargo bed. One end of the connecting member is attached to the body frame and the other end is attached to the arm part. When the front part of the platform is raised and the entire platform is tilted by fixing the arms to each other and connecting them, open the rear of the platform by making the state of the arm and lid part almost the same as before tilting the platform. Verbally It was formed.

[0008]

[Action]

 With the above-mentioned structure, the arm supporting the upper part of the lid is provided on the side of the loading platform so as to be rotatable. Therefore, if the arm is rotated, the rear of the loading platform can be closed. As the rocks swing, the rear of the cargo bed opens and closes.

Further, since the arm and the body frame are connected by the connecting member, the arm position does not change even when the entire cargo bed is tilted because it is independent of the tilting of the entire cargo bed. Similarly, the position of the lid that continues to the arm does not change.

Therefore, when the front of the cargo bed is lifted by the lifting device, the entire cargo bed is tilted by pivoting about the pivot of the lower part of the cargo bed. At that time, the rear of the cargo bed is naturally lowered. On the other hand, since the position of the lid does not change due to the connecting member, the side of the bed and the arm relatively rotate, and the rear end of the bed and the rear end of the lid are rotated. Since a gap is created, the rear part of the luggage carrier can be opened, and since the lid part is rotatably supported by the arm, if the lid part rotates, the rear part of the luggage carrier will be opened in a wider range. It will be.

This opening differs depending on the tilting of the entire loading platform, and when the entire loading platform tilts significantly, the rear portion of the loading platform remarkably descends, so that the opening amount increases.

[0012]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. The present invention is as shown in FIGS. 1 and 2, in which an arm 2 supporting a lid 1 is rotatably supported by a side 3 of a cargo bed, and the arm 2 is rotated with the rotation of the arm 2. The lid 1 is also rotatable. The upper part of the lid part 1 is supported behind the arm 2 and can be opened and closed with the supporting part 4 as a fulcrum. The arm 2 and the vehicle body frame 5 are connected by a connecting member 6 so that the position of the arm 2 can be regulated.

Here, as shown in FIG. 3, the lower end 7 of the lid portion 1 is hooked by a hooking portion 8 provided at the rearmost position of the loading platform, and the entire loading platform A has a predetermined angle. It is designed not to release the above-mentioned hook until it is tilted up to.

For this reason, a flexible linear material is used for the connecting member 6, one end of which is fixed to the vehicle body frame 5 and the other end of which is fixed to the tip 9 of the arm 2. When the entire loading platform A is tilted by the elevating device 10, the connecting member 6 does not pull the arm 2 until the predetermined angle is reached. When the entire load carrier A is further tilted, the connecting member 6 pulls the tip 9 of the arm 2 and a gap is created between the lid 1 and the load carrier rear B. It can be opened.

At this time, the tip end 9 of the arm 2 tries to rise due to the weight of the lid portion 1 that is not hooked, but the connecting member 6 becomes in a tensioned state and the connecting member 6 pulls the tip end 9 of the arm 2. As a result, the arm 2 can be maintained at a constant position, and the cargo bed side portion 3 also tilts with the tilting of the cargo bed A as a whole, but since the position of the arm 2 is constant, the both are relatively moved. It will rotate.

Therefore, the lid 1 is opened above the position of the rear B of the loading platform that is lowered due to the tilting of the entire loading platform A, so that the lid 1 will not be close to the ground surface, The height of the supplied sediment does not reach the lid 1 instantly, and the opening at the rear B of the loading platform is closed, so that the opened lid 1 does not hinder the supply of sediment and the like smoothly. Will be able to supply earth and sand to the ground

Further, since the position of the lid portion 1 does not change even if the entire loading platform A is tilted, the loading platform side portion 3 and the arm 2 relatively rotate, and the rear end a of the loading platform a. The gap between the cover 1 and the rear end b of the lid 1 becomes larger as the entire loading platform A tilts, and at the same time, the lid 1 is opened and closed by the support portion 4 provided on the arm 2, so that it is supplied to the ground from the opening. Since earth and sand can pass through a wide range, the amount of earth and sand that can be supplied at one time can be increased.

Further, by providing the abutting portion 13 on the inside of the arm 2, when the lid portion 1 closes the rear portion B of the loading platform, the closing can be completed and the weight of the lid portion 1 can be dispersed and supported. Like

As shown in FIG. 4, by providing a supporting rod 12 capable of supporting the arm 2 closer to the lid portion 1 than the shaft support portion 11, the arm 2 can be prevented from tilting to be similarly opened. be able to. In this case, since it is necessary to allow the tilting of the arm 2 until the entire loading platform A is tilted at a predetermined angle, it is natural that a structure capable of expanding and contracting is required.

[0020]

【effect】

 As described above, according to the present invention, when the entire loading platform is tilted by connecting the arm supporting the upper portion of the lid and the vehicle body frame by the connecting member, the arm is not tilted before the entire loading platform is tilted. Since it can be maintained at almost the same position and it can be maintained without changing, the lid does not move to the position and only the rear part of the loading platform descends, so the lid is close to the ground surface. In addition, the height of the earth and sand supplied to the ground does not reach the lid instantly, and the opening behind the cargo bed is not blocked by the earth and sand. It will be possible to smoothly supply to the ground.

Further, the lid portion opens as the entire loading platform tilts, and the opening range expands as the overall loading platform tilts. Therefore, the earth and sand supplied from the opening to the ground has a wide range. Therefore, the amount of earth and sand that can be supplied to the ground at one time can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view of a loading platform opening / closing mechanism according to the present invention.

FIG. 2 is an explanatory diagram

FIG. 3 is an explanatory diagram

FIG. 4 is an explanatory diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lid part 2 Arm 3 Luggage side part 4 Support part 5 Body frame 6 Connecting member 7 Lower end of lid part 8 Hooking part 9 Arm tip 10 Lifting device 11 Axial support part 12 Support rod 13 Abutment part A Whole load bed rear a rear end of loading platform b rear end of lid

Claims (2)

[Scope of utility model registration request] 1. A front part of a luggage carrier is supported by supporting an upper portion of a lid portion provided at a rear portion of the luggage carrier so as to allow the lid portion to rotate about the bearing portion and an elevating device provided upright on a body frame. When the entire front side of the loading platform is tilted by raising the front part of the loading platform, the rotatable lid keeps the vertical state by its own weight to open the rear of the loading platform. In the loading platform opening / closing mechanism, only the lid portion is independent, the upper portion of the lid portion is supported by an arm, and the arm is pivotally supported on the loading platform side portion, and one end of the connecting member is attached to the body frame and the other. By fixing the ends to the arms and connecting the two, and when the front part of the loading platform is raised and the entire loading platform is tilted, the arms and the lid are maintained at substantially the same positions as before the tilting of the loading platform.
A loading platform opening / closing mechanism characterized by opening the rear of the loading platform. 2. The loading platform opening / closing mechanism according to claim 1, wherein the connecting member is a bendable linear member, and the other end of the connecting member is fixed to the tip of the arm.