JPH0717650Y2 - Hydraulic piping structure in side-opening freight vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a hydraulic piping structure in a side-opening full-open freight vehicle.

(Prior Art) Conventionally, in a fully open side freight vehicle, the hydraulic piping of a hydraulic cylinder device that opens and closes the left and right L-shaped roofs up and down around a central support shaft is generally as shown in FIG. It had been.

That is, the pressure oil pipe from the hydraulic pump (not shown) is
After exiting the hydraulic unit h, bend and branch in the front / rear direction near the center under the bed floor. One goes directly under the front wall, the other just under the rear wall, and both are bent outward. Proceed to the corner of the loading platform, stand up from there, one stand up on the side of the front wall, and the other stand up along the side of the rear wall.After that, the hydraulic cylinder c installed in the recess in the ceiling of the front or rear wall. Connected to _{1 to} c 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, the hydraulic cylinder c ₁ or c ₃ on the front wall side and the hydraulic cylinder c ₂ on the rear wall side are required.
Or it is necessary to expand and contract in synchronization with c ₄ . For this reason, the pressure oil pipe between the hydraulic unit h and the right cylinder c _{1 at the} upper part of the front wall and the hydraulic unit h and the rear wall right cylinder c ₂ and the return oil pipe are respectively constructed to have the same length.
Both pipes (the same is true left cylinder c ₃ and c ₄₎ which are the adjustment of pipe length in the bed floor.

In the piping diagram in FIG. 7, the piping is linear at first glance, but in reality, there is a complicated piping path under the bed floor. In other words, it is necessary to pipe in a very narrow space under the floor of the cargo bed in a position avoiding the complicated main parts of the vehicle, so a large amount of joint parts, fasteners, etc. are required, and as a result, the pipe length It also had the drawback of adding adjustments and increasing the number of construction 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 Problems) In a fully open side freight vehicle in which a luggage box is mounted on a chassis via a subframe, the subframe is made of an Al extruded mold material and is integrated in a groove-shaped recess of the extruded mold material. It has a solid ridge portion and a pair of oil holes provided at the time of extrusion in the solid ridge portion, and the oil hole is connected to the pipe from the hydraulic unit by a lateral hole at the center in the longitudinal direction thereof. Also, piping was connected to the hydraulic cylinder before and after opening and closing the L-shaped roof at both ends of the oil hole.

(Embodiment) FIG. 6 is a perspective view of a fully open side freight vehicle according to the present invention. a is a pair of left and right L-shaped roofs, and is 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 expanding and contracting the hydraulic cylinder c. f
Is a luggage carrier, and g is a rear door. Reference numeral h is a hydraulic unit installed below the cargo bed f.

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

The hydraulic piping in the present invention is constructed as shown in FIG. The pressure oil generated in the hydraulic unit h is formed by integrally forming an oil passage over the longitudinal direction of a subframe (vertical joist) 2 made of an Al extruded material interposed between the chassis 1 and the bed f. is there.

The description will be made below with reference to FIGS. 1 to 4. FIG. 1 is a side-opening vehicle in which the present invention is implemented. A subframe 2 according to the present invention is attached to the top of a chassis 1. A cross member (horizontal joist) 3 orthogonal to the sub frame 2 is mounted on the sub-frame 2, and a cargo bed f is stretched on the cross member 3.

FIG. 2 is a sectional view taken along line II-II of FIG. 1, which will be described in more detail. The sub-frame 2 is placed on the chassis 1 with the spacer 4 sandwiched therebetween, and is tightened by the U bolt 5. The cross member 3 is attached by a bracket 6 and bolts 7 that are fixed to the subframe 2.

As shown in FIG. 3, the sub-frame 2 is made of an Al extruded material, is formed in a groove shape, and has a solid protruding portion 9 integrally formed in the groove-shaped recess 8. The solid ridge portion 9 has a pair of oil holes 10 provided at the time of molding.

The oil hole 10 is connected to a lateral hole 11 which is orthogonal to the oil hole 10 at the center of the subframe 2. A pipe 12 connecting to the hydraulic unit h is connected to the lateral hole 11. Both ends of the oil hole 10 are connected to pipes 13 connected to the front and rear hydraulic cylinders c ₁ and c ₂ (or c ₃ and c ₄ ), respectively.

(Effect) With the above-described configuration, the subframe 2 that also serves as hydraulic piping simplifies the hydraulic piping under the bed floor, and the number of pipe laying steps can be greatly reduced.

Since a considerable portion of the pipe conventionally arranged in the lower part of the floor of the cargo bed is placed in the groove-shaped recess of the subframe and protected in the groove-shaped recess, the risk of pipe damage is reduced.

Since the pipe 12 from the hydraulic pump is connected by the lateral hole 11 at the central portion of the entire length of the subframe in the longitudinal direction, it is easy to equalize the pipe lengths to the front and rear hydraulic cylinders, and it is easy to synchronize the front and rear hydraulic cylinders. .

By integrating the hydraulic piping with the vehicle body structure, piping, joint parts, clip cover materials, etc. are not required, and the number of installation steps can be greatly reduced.

Since it is a product whose body size changes each time, it is necessary to change the pipe length as well, but since the bodywork material that changes with the car body length immediately becomes the pipe length, there is an advantage that it is not necessary to make the pipe each time.

[Brief description of drawings]

FIG. 1 is a side view of a side fully open vehicle embodying the present invention. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a perspective view of the subframe. FIG. 4 is a sectional view taken along line IV-IV in FIG. FIG. 5 is a piping diagram of a vehicle in which the piping structure according to the present invention is implemented. FIG. 6 is a perspective view of a side fully open type vehicle. FIG. 7 is a piping diagram of a conventional side fully open vehicle. In the figure: a ... L-shaped roof, b ... Support shaft c ... Hydraulic cylinder, d ... Front wall e ... Rear wall, f ... Luggage g ... Rear door, h ... Hydraulic unit 1 ... Chassis, 2 ... Subframe 3 ... Cross member, 4 ... Spacer 5 ... U bolt, 6 ... Bracket 7 ... Bolt, 8 ... Groove-like recess 9 ... Solid ridge, 10 ... Oil hole 11 …… Side hole, 12 …… Piping 13 …… Piping

Claims (1)

[Scope of utility model registration request] Claims: 1. In a fully open side freight vehicle having a luggage box mounted on a chassis via a subframe, the subframe is
1 formed of an Al extruded mold material, having an integral solid ridge (9) in a groove-shaped recess (8) of the extruded mold material, and provided in the solid ridge (9) at the time of extrusion It has a pair of oil holes (10), and the oil hole (10) is connected to the pipe from the hydraulic unit by a lateral hole (11) at the central portion in the longitudinal direction, and L is provided at both ends of the oil hole (10).
A hydraulic piping structure in a side fully open freight vehicle, characterized in that it is connected to piping to hydraulic cylinders before and after opening and closing the mold roof (a).