JPH0717651Y2 - Hydraulic piping structure of hydraulic cylinder device for L-shaped roof opening and closing in a side fully open type freight vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a hydraulic piping structure of an L-shaped roof opening / closing hydraulic cylinder device in a side fully open type freight vehicle.

(Prior Art) Conventionally, in a side-opening freight vehicle, hydraulic piping of a hydraulic cylinder device for vertically opening and closing a pair of left and right L-shaped roofs around a central support shaft is generally shown in FIG. It was plumbed as shown.

That is, the pressure oil pipe from the hydraulic unit h is bent after exiting the hydraulic unit h, and branched in the front / rear direction near the center under the bed floor f, one under the front wall and the other under the rear wall. Go straight to the bottom of the wall, then bend outwards to the corner of the bed,
Each therefrom rises vertically upwards, one on the front wall side, and the other after rose respectively along the rear wall side, a front wall or a hydraulic cylinder c ₁ to c installed in the ceiling portion recess of the rear wall Connected to ₄ . On the other hand, the return oil pipe from the hydraulic cylinder is arranged almost in parallel with the pressure oil pipe.

By the way, in order to smoothly open and close the L-shaped roof a, it is necessary to extend and contract the hydraulic cylinder c ₁ (or c ₃ ) on the front wall side and the hydraulic cylinder c ₂ (or c ₄ ) on the rear wall side in synchronization with each other. There is.
Therefore, from the hydraulic unit h to the right cylinder on the upper part of the front wall.
c ₁ and the pressure oil pipe between the rear wall right cylinder c ₂ from the hydraulic unit h, and are construction the same length each return oil pipe, both pipes are the regulation of pipeline lengths in the bed floor .

Although the piping diagram in FIG. 11 is a linear piping diagram, in reality, there is a complicated piping path under the cargo bed floor f. That is, since it is necessary to pipe in a very narrow space below the cargo bed floor f at a position avoiding complicated main members of the vehicle, a large amount of joint parts, fasteners, etc. are required, and as a result, piping work is required. Had the drawback of increasing the number of steps.

(Problems to be solved by the invention) Of course, it is necessary to smoothly open and close the L-shaped roof,
An object is to simplify the piping group that is installed under the floor of the cargo bed.

(Means for Solving the Problem) The side frame member pivotally supported by a hinge on a support shaft for supporting an L-shaped roof in a side part fully open type freight vehicle is made of an extruded shape member, and the side frame member is a solid part and this. And an oil groove for opening and closing the L-shaped roof by forming a total of four upper and lower two oil holes in the solid portion so as to also serve as piping members and connecting these oil holes to each other. The oil holes of the piping member are connected to each other at a central position in the longitudinal direction of the piping member so that the front and rear hydraulic cylinders have the same distance.

Also, the rod of the hydraulic cylinder is pivotally attached to the top of the side portion, and the cylinder is pivotally attached to the L-shaped roof side so that the hydraulic piping to the hydraulic cylinder is not overcompressed.

(Embodiment) FIG. 10 is a perspective view of a side part fully open type freight vehicle according to the present invention. Reference character a denotes a pair of left and right L-shaped roofs, which are pivotally supported by a central support shaft b so as to be vertically openable and closable. c (c _{1 to} c ₄ ) is a hydraulic cylinder provided on the upper part of the front wall d and the rear wall e, and the L-shaped roof a is opened and closed vertically by the expansion and contraction of the hydraulic cylinder. f is a cargo bed floor, and g is a rear door. Reference numeral h is a hydraulic unit installed below the cargo bed floor f.

This invention relates to improvements in hydraulic piping structure for the hydraulic unit pressure oil generated by h and supplies the hydraulic cylinder c (c ₁ ~c _4), and back.

The hydraulic piping according to the present invention is constructed as shown in FIG. The pressure oil pipe or the return oil pipe for feeding the pressure oil generated in the hydraulic unit h is arranged substantially linearly in one half under the floor of the loading platform f and stands on the outer surface of the central portion of the front wall d. It is connected to an oil hole provided in the side frame member 1 (FIG. 2) of the L-shaped roof a pivotally supported by a hinge adjacent to the central support shaft b. In this case, the side frame material of the L-shaped roof a is made of an aluminum extruded material and also serves as a piping member. The details of the piping members are shown in FIGS. 2 to 9 below.
It will be described with reference to the drawings.

As shown in FIG. 3, the side frame member 1 which also serves as a piping member is a solid part.
1a and a groove 1b into which the aggregate 2 of the L-shaped roof fits, and a hinge 3 is attached between the solid portion 1a and the support shaft b. In the solid portion 1a of the side frame member 1, longitudinal oil holes 4a, 4a, 4 directed to the upper and lower two
b and 4b are integrally provided during extrusion molding.

Oil holes 4a, 4b are provided in the longitudinal direction of the piping member,
The left and right two oil holes communicate with each other by the lateral hole 4c at the center of the longitudinal direction (see FIG. 6).

The upper and lower oil holes 4a, 4a provided in the side frame member 1 are ends on the opposite side (rear side of the vehicle) to the side to which the pressure oil pipe 5 from the hydraulic unit h and the return oil pipe 6 to the hydraulic unit h are connected. The part is closed with a stopper 4e (Fig. 7). The pressure oil sent from one end also flows from this to the oil holes on the side. In this way the horizontal hole in the center
4c the through one is folded by equal pipe length up to the cylinder c ₁ and c ₂ of the front and rear (or c ₃ and c ₄₎ by flowing a pressurized oil, it is possible to equalize the frictional losses. Side oil hole 4b
Is connected to the pipes 7 and 8 to the front and rear hydraulic cylinders c ₁ and c ₂ (Fig. 2).

In the above description, the piping structure to the right hydraulic cylinder of the vehicle has been described, but the piping structure to the left hydraulic cylinder has the same structure, and therefore detailed description thereof will be omitted.

In FIG. 3, reference numeral 9 is a canvas sheet stretched between the left and right side frame members 1, 1 for supporting the rain near the spindle.

Next, in FIG. 1 or FIG. 2, the hydraulic cylinders c _{1 to} c ₄ are mounted on the rod side on the front / rear wall top side and on the cylinder side on the L-shaped roof a side. By doing so, an unreasonable force is not applied to the flexible pipe arranged between the side frame member 1 and the hydraulic cylinder c. That is, when the L-shaped roof a is opened and closed, both the side frame member 1 also serving as a piping member and the hydraulic cylinder c are rotated.

(Effect) The side frame member on the side pivotally supported by the support shaft b of the L-shaped roof a was made of an extruded mold material, and this was also used as a piping member. Since the upper and lower oil holes 4a and 4b communicate with each other through the horizontal holes 4c, the pressure oil and the return oil are distributed to and collected from the hydraulic cylinders in the piping member. As well as simplifying the underfloor piping of the cargo bed, the number of man-hours for piping work can be greatly reduced.

Further, since the distribution / collection portion of the pressure oil and return oil pipes to each hydraulic cylinder is made by the lateral hole provided in the central portion in the longitudinal direction of the side frame member 1, the piping between this portion and the front and rear hydraulic cylinders is used. The friction loss becomes equal, and the L-shaped roof can be opened and closed smoothly.

Furthermore, the rod side of the hydraulic cylinder is pivotally supported on the side wall top side, and the cylinder side is pivotally supported on the L-shaped roof side. Therefore, unnecessary force is not applied to the piping to the hydraulic cylinder, so smooth movement is possible and its life is extended. It also contributes to improvement.

[Brief description of drawings]

FIG. 1 is a hydraulic piping diagram according to the present invention. FIG. 2 is a perspective view in the vicinity of a side frame member which also serves as a support shaft and a piping member pivotally supported by the support shaft. FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 4 is a view taken along the line IV-IV in FIG. FIG. 5 is a perspective view of a side frame member. FIG. 6 is a sectional view taken along line VI-VI in FIG. FIG. 7 is a view on arrow VII of FIG. FIG. 8 and FIG. 9 are explanatory views of the operation mode of the hydraulic cylinder and its piping. FIG. 10 is a perspective view of a side-opening freight vehicle in which the present invention is implemented. FIG. 11 is a hydraulic piping diagram of a well-known side fully open freight vehicle. In the figure: a ... L-shaped roof, b ... Central support shaft c ... Hydraulic cylinder, d ... Front wall e ... Rear wall, f ... Luggage floor g ... Rear door, h ... Hydraulic unit 1 Side frame material (which also serves as a piping member) 1a ... solid part, 1b ... groove 2 ... aggregate material, 3 ... hinge 4a, 4b ... oil hole, 4c ... lateral hole 4d ... plug, 4e ... … Plug 5 …… Pressure oil piping, 6 …… Return oil piping 7 …… Piping, 8 …… Piping 9 …… Canvas sheet

Claims (2)

[Scope of utility model registration request] 1. A side frame material pivotally supported by a hinge on a support shaft (b) for supporting an L-shaped roof in a fully open side freight vehicle is made of extruded mold material, and the front side frame material is a solid part ( 1a) and a groove (1b) integral therewith, and in the solid part (1a) there are provided four oil holes in upper and lower two stages in total to serve as piping members, and these oil holes are mutually connected. The L-shaped roof opening / closing hydraulic cylinder device is communicated with a part of the piping, and the position where the oil holes of the piping member communicate with each other is the central portion in the longitudinal direction of the piping member. Piping structure of a hydraulic cylinder device for opening and closing an L-shaped roof in an automatic freight vehicle. 2. The opening and closing of the L-shaped roof in a fully open side freight vehicle according to claim 1, wherein the rod of the hydraulic cylinder is pivotally mounted on the side wall top side and the cylinder is pivotally mounted on the L-shaped roof side. Hydraulic piping structure of hydraulic cylinder device.