JP3032607U - Lorry - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To operate the cylinder, which is the only drive source, to automatically move the rear part of the platform to the rearward tilted state and the horizontal state, and surely stop in the same state in the horizontal state. To provide a lorry that does. SOLUTION: A lower end of a link 8 is axially supported by a chassis frame rear part 5 which is formed so as to be able to support a rear part 2 of a loading platform in a tilted state, and a roller 10 at the upper end of the link is guided to a guide rail 18 in the front-rear direction at the rear part of the loading platform. The end of the rod 15a of the cylinder 15, which is slidably installed along the link, is pivotally supported on the upper end side of the link below the loading platform, and the link responds to the drive of the rod and swings to a substantially upright position. From this, the swinging is restricted by the hanging stopper 20, and at the same time, the rear part of the loading platform, which is integrally linked with the link, is driven from the backward tilted state to the horizontal state.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a freight vehicle useful for loading and unloading heavy objects such as various self-propelled construction machines from the rear side of a loading platform.

[0002]

[Prior art]

 For example, there is a lorry shown in FIGS. 6 and 7. The rear tilting structure of the rear part of the vehicle allows the rear part 51 of the chassis frame 50, which is supported by the rear part of the chassis frame, to be pushed up horizontally by the cylinder 52, and the rear part 51 of the rear part is placed horizontally. In order to hold it, a spacer 53 is interposed between the chassis frame rear portion 50 and the luggage carrier rear portion 51 and is locked by a stopper 54. Then, when loading and unloading the loading platform rear part 51 from the horizontal state to the rearward tilted state, the stopper 54 is removed to unlock, the loading platform rear part 51 is pushed up slightly higher than the horizontal state and stopped, and the spacer 53 is tilted. , Lowering the cargo bed rear part 51 to the upper surface of the chassis frame rear part 50 requires work. In addition, in order to return the rear part 51 of the loading platform to the horizontal state after loading and unloading, the rear part 51 of the loading platform is pushed up a little higher than the horizontal state and stopped.The spacer 53 is raised to interpose between the rear part 50 of the chassis frame and the rear part 51 of the loading platform. , The rear part 51 of the platform is lowered onto the upper surface of the spacer 53, and the rear part 51 of the platform and the spacer 53 are locked by the stoppers 54. Not only is this work inefficient, but the work of tilting and raising the spacer 53 and the work of removing and hooking the stoppers 54 must be performed manually by moving them to the left and right of the vehicle, which is extremely troublesome. In addition, it is labor-intensive, and since the work is performed on the lower side of the loading platform, which has a low height, there is a serious labor problem.

[0003]

[Problems to be solved by the device]

 The first problem to be solved is to operate the cylinder, which is the only drive source, to automatically move the rear part of the platform to the rearward tilted state and the horizontal state, and the same state in the horizontal state. The second purpose is to provide a lorry that can be securely stopped and that the rear part of the platform is stable in a horizontal state without moving up and down.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a freight vehicle in which the rear part of the loading platform of the loading platform can be tilted rearward with the hinge at the front end as a fulcrum, and the rear part of the loading platform can be received in a tilted state. The lower end of the link is pivotally supported on the rear part of the chassis frame, the roller at the upper end of this link is slidably installed along the guide rail in the front-rear direction at the rear part of the loading platform, and the cylinder is pivotally supported on the upper end side of the link under the loading platform. When the tip of the rod is pivotally attached and the link responds to the drive of the rod and swings to a substantially upright position, the rear end of the load platform is restricted from swinging by the hanging stopper and the rear part of the load platform that is integrally linked with the link is It is characterized in that it is driven from the backward tilted state to the horizontal state. Further, the present invention is characterized in that the stopper is formed in such a manner that it can be fitted to the fitting portion of the link at the same time as the link swings to the standing state. The stopper and the fitting portion may have a relationship in which one is a convex portion and the other is a concave portion, or one is a protrusion and the other is a hole.

[0005]

[Embodiment of device]

 1 to 5 illustrate one embodiment of a freight vehicle of the present invention, in which a luggage carrier 1 is provided with a luggage carrier rear portion 2 which can be tilted backward with a hinge 3 at a front end as a fulcrum. The chassis frame 4 has a downwardly inclined chassis frame rear portion 5 formed on the upper surface 5a thereof so as to be able to receive the rear portion 2 of the loading platform in a rearwardly inclined state. A rear support 6 is installed near the rear ends of the rear left and right chassis frames 5, and lower ends of links 8 are pivotally attached to left and right bearings 7 of the rear support 6 by a shaft 9. The link 8 is formed in a substantially H shape, the lower ends of the left and right legs 8a thereof are axially attached to the left and right bearings 7, respectively, and the roller 10 is provided on the outer surface of the upper ends of the left and right arms 8b. The hole-shaped fitting portions 12 are formed in the plate-shaped extending portions 8c that are pivotally connected to each other and project inward from the inner surface portions of the upper ends of the left and right arm portions 8b.

A front support 13 is provided near the front ends of the left and right chassis frame rear portions 5, and a cylinder 15 is pivotally attached to a bearing portion 14 of the front support 13 about a shaft 16. The tip of the rod 15a of the cylinder 15 is pivotally attached to the bearing 8e at the center of the lateral rod 8d of the link 8 by a shaft 17, and the link 8 swings in a forward tilted state and an upright state as the rod 15a is driven. As shown in the figure, they are linked together.

Further, in the rear part 2 of the loading platform, guide rails 18 are hung vertically on the left and right sides of the bottom surface, and the left and right guide rails 18 have a U-shaped cross section whose opening sides face inward. The left and right rollers 10 of the link 8 are respectively housed in the rail portions 18a of the rail 8 so that they can roll forward and backward. When the link 8 is tilted forward, the rear part 2 of the load carrier is in a rearward tilted state, while when the link 8 is erected, the load carrier is lifted. The rear part 2 is integrally formed so as to be horizontal. Therefore, the length between the shaft centers of the shaft 9 and the shaft 11 in the link 8 is set so that the rear part 2 of the luggage carrier is in the same horizontal plane as the luggage carrier 1 when the link 8 is in the upright state. .

Further, on the horizontal rod 19 which is installed on the rear ends of the left and right guide rails 18 in the rear part 2 of the loading platform, projecting stoppers 20 are arranged so as to face the left and right hole-shaped fitting portions 12 on the link 8 side, respectively. I am doing it. The tip portions 20a of the left and right protruding stoppers 20 project forward from the horizontal rod 19, the tip diameter is smaller than the fitting portion 12 hole diameter, and the base end diameter is larger than the fitting portion 12 diameter. It is formed in the shape of a circular truncated cone, and when the link 8 swings from the forward tilted state to the upright state, the fitting portion 12 is fitted to the tip portion 20a, and the link 8 is moved backward. It is regulated to the standing state by preventing the swinging of the carriage, and the rear portion 2 of the carrier is regulated through the link 8 so as not to move up and down with respect to the rear portion 5 of the chassis frame.

A gate 21 is rotatably supported at the rear end of the rear part 2 of the loading platform, and the gate 21 is interlocked with a cylinder 22 so that it can be moved upright and in a horizontal state in the same plane as the rear part 2 of the loading platform. I am doing it. A sub-gate 23 is swingably supported at the rear end of the rear portion 2 of the luggage carrier. The gate 21 and the sub-gate 23 also serve as walk boards, and are formed so as to be able to bridge between the rear part 2 of the loading platform and the ground when loading and unloading. Further, grounding legs 24 are provided at the rear end of the rear part 2 of the loading platform and the rear end of the gate 21, respectively.

When the truck is unloaded, the link 8 is controlled by the extended rod 15a of the cylinder 15 and the stopper 20 to stand up, so that the rear part 2 of the cargo bed is kept horizontal (see FIG. 3). Be drunk The cylinder 15 is controlled through a check valve so that the rod does not move excessively. When the vehicle is loaded and unloaded, the link 8 is pulled by the contracted rod 15a of the cylinder 15 and exhibits a forward tilted state, so that the rear part 2 of the luggage platform is supported by the rear part 5 of the chassis frame and is tilted backward ( (See FIG. 1), the gate 21 and the sub-gate 23 are lowered to prepare for loading and unloading.

[0011]

[Effect of device]

 A. According to claim 1, by merely operating the cylinder, which is the only drive source, the rear part of the platform is automatically moved from the rearwardly inclined state to the horizontal state and from the horizontal state to the rearwardly inclined state to control the posture. be able to. When the rear part of the load platform is tilted backward, it is supported by the rear part of the chassis frame in a stable state, and when horizontal, it is supported by the rear part of the chassis frame via a link that is regulated by the stopper and the rod of the cylinder to stand upright. You can adjust the appearance of each. B. According to the second aspect, the rear portion of the loading platform is stable in a horizontal state without moving up and down, and thus is safe during traveling.

[Brief description of drawings]

1A is a side view illustrating one embodiment of a lorry of the present invention, and FIG. 1B is a partially enlarged side view.

FIG. 2 is a partially enlarged plan view with a part cut away.

FIG. 3 is an enlarged side view of a main part.

FIG. 4 is a vertical sectional view taken along line (4)-(4) of FIG.

FIG. 5 is a partially enlarged vertical sectional view.

FIG. 6 is a partial side view of a conventional truck.

FIG. 7 is a vertical sectional view taken along line (7)-(7) of FIG.

[Explanation of symbols]

1 platform 2 rear platform 3 hinge 4 chassis frame 5 chassis frame rear 6 rear support 7 rear support bearing 8 link 8a link leg 8b link arm 8c link plate extension 8d link horizontal rod Part 8e Bearing part of the horizontal rod part 9,11,16,17 Axis 10 Roller 12 Hole fitting part 13 Front support 14 Bearing part of the front support 15 Cylinder 15a Rod 18 Guide rail 18a Rail part 19 Horizontal rod 20 Stopper 20a Tip 21 Gate 22 Cylinder 23 Subgate 24 Grounding leg

Claims (2)

[Scope of utility model registration request] 1. A freight vehicle in which a rear portion of a loading platform of a loading platform is provided so as to be tiltable rearward with a hinge at a front end as a fulcrum, and a rear portion of a chassis frame formed to be able to support the rear portion of the loading platform in a tilted state. The lower end of the link is pivotally supported, the roller at the upper end of the link is slidably accommodated along the guide rail in the front-rear direction at the rear of the loading platform, and the rod end of the cylinder axially supported under the loading platform is pivotally attached to the upper end side of the link.
When the link responds to the drive of the rod and swings to almost the standing state, the swinging from the rear part of the loading platform is regulated by the hanging stopper, and at the same time, the rear part of the loading platform linked with the link follows the horizontal state from the backward tilted state. A freight vehicle, characterized in that 2. The lorry according to claim 1, wherein the stopper is formed so as to be capable of fitting with the fitting portion of the link at the same time when the link swings to the upright state.