JPH0565665U - Tilting structure of carrier bed - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] In a transport vehicle that can raise the loading platform vertically and perform a dump operation at a high position, enable vertical lifting of the loading platform and dump operation with the same operating mechanism. The structure is simple and easy to operate. A front upper end and a front lower end of a pair of left and right cross links 1 are rotatably attached to a carrier 2 and a machine base 3 by pivot shafts 4, respectively, and a rear upper end and a rear lower end are supported. 2 and the guide rails installed on the machine base 3 are engaged with each other so that they can move along the guide rails, and the cross link 1 is flexed / extended by the expansion / contraction mechanism 8 to lift and lower the cargo bed 2. A guide rail with which a rear lower end is engaged is provided by connecting a refraction guide path 7b to the front part of the horizontal guide path, and when the rear lower end of the cross link 1 moves along the horizontal guide path, the loading platform 2 is in the vertical direction. When it is moved up and down and guided by the bending guide path 7b, the dump is tilted to the lower front.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading platform tilting structure of a carrier capable of vertically moving a loading platform mounted on a machine platform and performing a tilting dump dump in an ascending posture.

[0002]

[Prior Art]

 Conventionally, there has been known one in which a carrier bed of a transport vehicle can be vertically lifted and a dumping operation can be performed in the lifted state so that unloading can be advantageously performed (for example, the actual open sho-56- (See No. 122634 and No. 2-75233).

[0003]

[Problems to be solved by the device]

 Although conventional carriers can raise the loading platform in the vertical direction and perform a dumping operation at a high position, a lifting mechanism for vertically moving the loading platform and a dumping operation mechanism for dumping the loading platform are provided. It was necessary separately, and also in the process of vertically moving the load platform, a load mechanism was required to lock the load platform in a non-dump state and to switch to the unlocked state when the dump was operated. The structure is extremely complicated and difficult to operate. The present invention has been made in view of these difficulties, and an object thereof is to provide a vertical movement of the loading platform and a loading platform without requiring a latching mechanism for maintaining the loading platform in a non-dumping state. (EN) It is possible to provide a simple and easy-to-operate platform tilting structure capable of smoothly performing a dumping operation in a raised state with a single operating mechanism.

[0004]

[Means for Solving the Problems]

 That is, in the tilting structure of the bed according to the present invention, the front upper end and the front lower end of the pair of left and right cross links (1) (1) are attached to the bed (2) and the machine base (3), respectively. ) So that the rear upper end and the lower rear end can move along the guide rails (6) and (7) installed on the platform (2) and the machine platform (3), respectively. In the transport vehicle for moving the cross link (1) (1) up and down with the telescopic mechanism (8) to raise and lower the bed (2), the rear lower end of the cross link (1) (1) is engaged. A matching guide rail (7) is provided by connecting a refraction guide path (7b) to the front part of the horizontal guide path (7a), and the rear lower end of the cross link (1) (1) is located at the horizontal guide path (7). It is characterized in that the loading platform (2) moves up and down in the vertical direction when moving to 7a), and when it is guided by the bending guideway (7b), it tilts to the front low. Is shall.

[0005]

[Action]

 In the carrier having the tilting structure of the bed of the present invention, when the extension mechanism (8) is extended, the rear upper ends of the pair of left and right cross links (1) (1) are guided by the bed (2). While moving forward along (6), the lower rear end moves forward along the horizontal guideway (7a) of the guide rail (7) of the machine base (3). The crosslinks (1) and (1) are stretched and deformed in a vertically long state, and the stretchable deformation causes the loading platform (2) to rise while maintaining a horizontal posture. Then, when the extension operation of the telescopic mechanism (8) is further continued, the upper rear portion of the cross link (1) (1) moves further forward along the guide rail (6) of the loading platform (2). On the other hand, the rear lower end of the cross link (1) (1) moves from the horizontal guideway (7a) of the guide rail (7) of the machine base (3) to the bend guideway (7b). As a result, the cross links (1) and (1), which have been elongated and deformed in the longitudinal direction as described above, are deformed to the forward bent state, and the cross links (1) are moved. The platform (2) supported by (1) is dumped and tilted to the front low.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a carrier carrying the structure of the present invention, FIG. 2 is a schematic plan view of a carrier carrying the structure of the present invention, FIG. 3 is an operation explanatory view of the structure of the present invention, and FIG. It is a figure.

In FIG. 1 and FIG. 2, the carrier is equipped with a machine base (3) having a traveling section (9) and a pair of left and right cross links (1) and (1) on the machine base (3). It is composed of a loading platform (2) and the like. The traveling part (9) is provided as a pair of left and right crawlers below the machine base (3), and an engine (not shown) in an engine room (10) disposed above the rear part of the machine base (3). It is designed to be driven by a mission (12) that is linked and linked to the (). An operating device (13) is provided at the rear end of the machine base (3).

Each of the pair of left and right cross links (1) and (1) is formed by combining two link plates (1a) and (1b) in an X shape in a side view, and connecting their intersections with a connecting shaft (14). It is composed so that it can rotate freely. Then, the upper ends of the link plates (1a) of the left and right cross links (1) (1), that is, the front upper ends of the entire cross links (1) (1) are pivotally supported on the lower front part of the luggage carrier (2). The lower end of the link plate (1b), that is, the lower front end of the entire cross link (1) (1) is attached to the front of the machine base (3) while being pivotally attached by the shaft (4). Each part is rotatably supported by a pivot shaft (5).

On the other hand, a roller is provided at the rear upper end of the link plates (1a) (1a) of the cross link (1) (1), that is, at the rear upper end of the entire cross link (1) (1). The rollers are engaged with each other so that they can be moved along a guide rail (6) in the front-rear direction which is laid parallel to the lower surface of the loading platform (2). A roller is also provided at the rear lower end of the other link plate (1b) (1b) of the cross link (1) (1), that is, the rear lower end of the entire cross link (1) (1). , The rollers are engaged so that they can be moved along the guide rails (7) in the front-rear direction which are laid parallel to each other on the machine base (2).

As can be seen from FIG. 4, the guide rail (7) of the machine base (2) has a horizontal guideway (7a) in the rear half of the front and rear direction and a bend guideway in the front half. The bent guideway (7b) in the front half is formed as (7b) and is connected to the rear end of the horizontal guideway (7a) and is inclined forward and upward, and the front of the inclined guideway. It consists of a horizontal road that connects to the department.

The cross link (1) (1) configured as described above is bent and extended by the hydraulic cylinder that is the expansion and contraction mechanism (8). The hydraulic cylinder (8) has an actuating arm (16) extending from a tubular body (15) fitted to a connecting shaft (14) that rotatably connects the intersections of the link plates (1a) and (1b). ), The cylinder pivotally attaches the end of the ring, and the piston extends the end of the ring from the cylinder (17) fitted on the roller shaft of the link plates (1b) (1b). It is pivotally mounted on the arm (18), and can be expanded and contracted by a hydraulic device including a hydraulic pump and a switching valve driven by the engine in the engine room (10). There is.

Reference numeral (19) is a tilting door provided on the front surface of the luggage carrier. In addition, (J) of FIG. 4 is the locus of movement of the roller at the rear upper end of the link plates (1a) and (1a), and (M) is the locus of movement of the connecting shaft (14) connecting the intersections of the link plates. , (L) is the movement locus of the pivot shaft (4) at the time of dumping the platform, (K) is the movement locus of the connection point between the hydraulic cylinder (8) and the operating arm (16), and (N) is the hydraulic cylinder. The locus of movement of the connection point between (8) and the operating arm (18) is shown.

Therefore, when the hydraulic cylinder (8) is reduced to the minimum size, the cross links (1) and (1) are folded to be the lowest as shown in FIG. Thus, the cargo bed (2) supported by the upper ends of the cross links (1) (1) is kept at the lowest position. From this state, when the hydraulic cylinder (8) is started to expand, the hydraulic cylinder (8) is gradually changed from the sideways tilted posture shown in FIG. 1 to the standing posture (see loci K and N in FIG. 4). , The roller at the rear lower end of the cross link (1) (1) moves forward along the horizontal guide path (7a) of the guide rail (7), and the cross link (1) (1) The roller at the rear upper end moves forward along the guide rail (6) of the loading platform (2), and the cross links (1) (1) are stretched and deformed into a vertically long state. By the extension deformation, the loading platform (2) is lifted vertically while maintaining the horizontal posture. This vertical ascending is performed while the roller at the lower rear end of the cross link (1) (1) moves along the horizontal guideway (7a) (0 to A in FIG. 4).

In this way, when the loading platform (2) is lifted to the highest lifted position in the horizontal posture and the extension operation of the hydraulic cylinder (8) is further continued, the cross link (1) (1) The roller at the lower rear end moves from the horizontal guideway (7a) part of the guide rail (7) of the machine base (3) to the bending guideway (7b) part, As shown in the figure, it moves along the bending guideway (7b), and the roller at the rear upper end of the cross link (1) (1) continues to follow the loading platform (2) along the guide rail (6). As shown in A ′ to F ′ of FIG. 4, in this process, the crosslinks (1) and (1) that have been elongated and deformed in the longitudinal direction as described above are deformed to the forward leaning state, and the crosslinks (1) ) (2), which is supported by (1), is dumped and tilted forward.

[0015]

[Effect of the device]

 As described above, in the tilting structure of the carrier of the present invention, the front upper end and the front lower end of the pair of left and right cross links (1) (1) are pivotally supported on the carrier (2) and the machine base (3), respectively. It is rotatably attached by shafts (4) and (5), and the upper rear end and the lower rear end are guided along the guide rails (6) and (7) installed on the platform (2) and the machine platform (3). In which the respective cross links (1) and (1) are flexed and extended by the expansion and contraction mechanism (8) to move up and down the loading platform (2). The guide rail (7) with which the lower rear end of (1) engages is provided by connecting the refraction guide path (7b) to the front part of the horizontal guide path (7a), and the cross link (1) (1) When the lower rear part of the vehicle moves along the horizontal guideway (7a), the loading platform (2) moves up and down vertically, and when guided by the bending guideway (7b), the dump truck tilts to the front low. Therefore, the mechanism for suspending the loading platform in the non-dumping state, which was required in the conventional structure as disclosed in Japanese Utility Model Laid-Open No. 56-122634 and Japanese Utility Model Laid-Open No. 2-75233, is eliminated, and a single unit is used. The actuating mechanism enables smooth vertical movement of the platform and dump operation when the platform is raised, which greatly simplifies the structure and facilitates the operation. It should be noted that the structure of the present invention is not limited to the front tamping type in which the loading platform is dumped forward in the traveling direction of the airframe, but the loading platform can be dumped rearward in the traveling direction of the airframe and also on the left side of the aircraft. Alternatively, it can be applied to the side dump type for dumping the loading platform to the right side, and the same effect can be obtained when applied to them.

[Brief description of drawings]

FIG. 1 is a side view of a carrier in which the structure of the present invention is implemented.

FIG. 2 is a schematic plan view of a carrier in which the structure of the present invention is implemented.

FIG. 3 is an explanatory view of the operation of the structure of the present invention.

FIG. 4 is an operation locus diagram of the structure of the present invention.

[Explanation of symbols]

 1 cross link 2 loading platform 3 machine platform 4 pivot shaft 5 pivot shaft 6 guide rail 7 guide rail 7a horizontal guide path 7b bending guide path 8 expansion mechanism (hydraulic cylinder)

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right crosslinks (1) (1) can be pivoted at the upper front end and the lower front end thereof to a carrier (2) and a machine base (3) by pivot shafts (4) and (5), respectively. The upper end and the lower end of the rear are engaged so that they can be moved along the guide rails (6) and (7) installed on the loading platform (2) and the machine platform (3), respectively. In a transport vehicle for moving the link (1) (1) up and down with the telescopic mechanism (8) to move the loading platform (2) up and down,
A guide rail (7) with which the rear lower end of the cross link (1) (1) is engaged is provided by connecting a refraction guide path (7b) to the front part of the horizontal guide path (7a). (1) When the rear lower end of (1) moves along the horizontal guideway (7a), the loading platform (2)
Is vertically moved, and when guided by the refraction guideway (7b), the dump truck tilts to the front lower position.