JPS6210319Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a control valve on the fixed side of a reach-type lift truck, and an actuator (hydraulic motor, hydraulic cylinder, etc.) for the mast on the movable side that moves in the reach or for the attachments installed on the mast. The present invention relates to a support device for fluid piping that connects the fluid pipes.

In a conventional reach type lift truck, as shown in FIG. (not shown) or further connect this hose 9 with a connector 18.
and the pulley 1 at the upper end of the mast 4
9 is connected to an attachment attached to the mast 4, such as a shift cylinder or a tail cylinder for the fork 10, but in this piping method, the control valve 2 and the mast side Since a suitable number of hoses 9 connecting the two are exposed to the outside, there is a risk that the hoses will be damaged by falling objects or protrusions from collapsing cargo, which is very dangerous. This has the disadvantage that it obstructs the forward vision of workers during cargo handling operations, especially when loading cargo downward.

The purpose of the present invention is to provide a support device for fluid piping in a reach-type lift truck that eliminates the above-mentioned drawbacks, protects the hose from damage caused by falling objects, and improves the front visibility of the operator. This is what I am trying to do.

The illustrated embodiment embodying the device of the present invention will be described below. In the figure, reference numeral 1 denotes a frame that constitutes the main body of the lift truck. It makes up the vehicle body. A control valve 2 is housed in the upper part of the frame 1, and at the same height as the height between the upper and lower walls of the leg 5 at the lower part of the frame 1, there are two sheets having a horizontally long guide groove 12 extending in the front and back direction. Guide support plates 13 are provided oppositely at a constant interval in the vehicle width direction. The shaft portions 14 of two independently rotatable pulleys 8, 8' are slidably fitted into the guide groove 12 of this guide support plate 13, and the shaft portions 14 of the pulleys 8, 8'
A return spring 16 is stretched between a bracket 15 attached to the frame 1 and a part of the frame 1, so that the pulleys 8, 8' are always biased rearward. On the other hand, in order to move the mast 4 back and forth along the legs 5, the tip of the piston rod 7 of the reach cylinder 6 whose base end is fixed to the lower part of the frame 1 and is arranged parallel to the left and right legs 5 or the lower part of the mast is Two hose reels 3 and 3', which can each rotate independently, are mounted on the same axis so that their outer peripheral surfaces do not protrude beyond the upper and lower walls of the legs 5. The base end of the reach cylinder 6 is supported at the lower part of the frame 1, approximately above the vehicle center line, and the tip of the piston rod 7 is connected to approximately the center of an under beam (not shown) that connects the left and right masts 4. 6 is arranged in parallel with the left and right legs 5 so that the upper and lower surfaces thereof do not protrude beyond the upper and lower surfaces of the left and right legs 5.

Two flexible hoses 9, 9' for supplying and discharging fluid extending from the control valve 2 are fixed to the frame 1 by suitable fasteners 17 near the pulleys 8, 8, and then hung on the pulleys 8, 8', leading to the hose reels 3, 3' and wound around the hose reels 3, 3'. One of the hoses is connected to a lift cylinder (not shown) for raising and lowering the mast, and the other passes through the front of the mast 4 and is connected to a fork actuator (not shown) mounted on a lift bracket 11 for supporting the fork 10. Thus, most of the hoses 9, 9' are piped in a state where they are hidden under the frame 1 and the legs 5. The hose reels 3, 3'
Although not shown, a power spring or the like is built in the hose 9, 9', which constantly urges the hose 9, 9' in the winding direction to apply a constant tension to the hose 9, 9'.

This embodiment is configured as described above,
Therefore, when the mast 4 moves forward by projecting the piston rod 7 of the reach cylinder 6 forward, each hose 9,
Guide support plate 13 due to the tensile force acting on
The pulleys 8, 8' supported at When the hoses 9 and 9' are moved backward, the pulleys 8 and 8' are returned to their original positions by the force of the return spring 16, so that the hoses 9 and 9' are retracted without slack. Furthermore, when the fork 10 is raised, only the hose 9 connected to the fork actuator is pulled;
Only the hose reel 3 that winds up the hose 9 rotates and lets out the hose 9 by an amount corresponding to the lift amount of the fork 10 to correspond to the rise of the fork 10. Conversely, when the fork 10 descends, The hose 9 is wound up without any slack due to the rotation of the hose reel 3 due to the restoring force of the mainspring spring or the like.

As detailed above, the present invention connects the control valve and the actuator on the mast side to a hose reel provided to move together at the bottom of the mast that moves forward and backward, and a pulley provided at the bottom of the frame on the control valve side. By hanging a flexible hose for connection and shielding the hose from the bottom of the frame and the legs, the hose is protected from falling objects due to cargo collapse, etc., or contact with protrusions, etc. Since it can prevent damage before it happens, it is very useful in preventing danger, and it also does not impair the aesthetic effect of the vehicle, and it makes it easier to install headlamps, limit switches, etc. that are attached to the mast in terms of space. Since the middle part of the hose is always hidden by the lower part of the frame and the legs, it is possible to improve the forward field of view from the driver's seat, especially during downward loading work, compared to the conventional system. In addition, in this invention, the reel is movable in the front-rear direction and is always biased backward by a spring, so the hose can be kept under tension and prevented from sagging, and can be used for long periods of time. This can absorb the slack caused by the elongation of the hose.

[Brief explanation of the drawing]

FIG. 1 is a side view showing conventional piping in a reach type forklift truck, FIG. 2 is a partially cutaway side view showing an embodiment of the present invention, and FIG. 3 is a plan view showing the main parts. 1... Frame, 2... Control valve,
3, 3'...Hose reel, 4...Mast, 6...
...Reach cylinder, 8, 8'...Pulley, 9,
9'...Hose, 12...Guide groove, 13...Guide support plate, 16...Return spring.

Claims (1)

[Scope of utility model registration request] In a reach-type lift truck in which the mast is configured to be able to move back and forth along legs 5 extending forward from the bottom of the frame, the mast is positioned at the same height between the upper and lower walls of the legs 5 at the bottom of the moving back and forth. is equipped with two hose reels that can be rotated independently and are always biased in the winding direction by springs, and two hose reels that can be rotated independently are installed at the same height as between the upper and lower walls of the legs at the bottom of the frame. A pulley is provided so as to be movable in the front and back direction, and the pulley is always urged backward by a spring, and is used for communication between the control valve installed on the frame side and the actuator installed on the mast side. A reach-type lift in which a flexible intermediate portion of the hose that can move forward and backward and move following the lifting and lowering movements of the fork is wrapped around the pulley and the intermediate portion of the hose is always hidden by the lower part of the frame and the legs. Support device for fluid piping in trucks.