JPH0638072Y2 - Forklift attachment piping - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a pipe for attachment of a forklift, more specifically, a plurality of mast pipes arranged vertically between masts and fixed to the body frame side. Related to the piping for connecting to the oil control valve.

(Prior Art) FIG. 4 shows piping between a conventional mast pipe 37 and an oil control valve 31. As shown in the figure, the oil control valve 31 is attached to the lower portion of the inner surface of the vehicle body frame 32 (specifically, the front protector) by a bolt 33. Two hoses 40 are connected to the upper and lower two actuator ports formed on the rear surface of the oil control valve 31 via elbow-shaped pipe joints 38 having different rearward projection amounts.
Is routed from the rear surface of the oil control valve 31 through the lower surface to the front surface in a substantially U shape, and the body frame 32
Mast pipes located between the masts 36 located in front of the
It is connected to 37.

(Problems to be Solved by the Invention) In the above-described conventional piping system, when the mast 36 tilts back and forth, the entire U-shaped hose 40 moves freely in the front-rear direction. Therefore, it is necessary to secure a considerable space around the hose 40. However, in reality, as shown in the figure, the drive motor 35 and the differential housing 3 are provided near the oil control valve 31.
4. There is an outer mast lower cross beam 36a, etc., and it is very difficult to secure an extra space. Therefore, when the mast is tilted, the hose 40 may interfere with the peripheral devices and members, causing damage and oil leakage.

Also, when connecting the hose 40 to the pipe joint 38, in order to insert the spanner from a direction perpendicular to the paper surface of FIG. The two pipe joints 38 have different lengths in the front-rear direction, so that the hose 40 is displaced in the front-rear direction. However, the hose fitting 41 of the hose 40 connected to the lower pipe joint 38 is provided. However, since the hose 40 connected to the upper pipe joint 38 interferes with the spanner and it is difficult to apply the spanner, the assembling order of the hose 40 is limited. As the drive motor 35 interferes with the relationship of tightening the hose fitting 41 by shaking it in the left-right direction, and the swing width of the spanner is restricted, the work of assembling the hose 40 to the pipe joint 38 and the additional tightening work after the machine base is completed Is very troublesome It was.

Therefore, in view of the above problems, it is an object of the present invention to provide a pipe that prevents damage to a hose and that can be easily tightened by a spanner.

(Means for Solving the Problems) The present invention is configured as follows to solve the above problems.

A pipe between an oil control valve fixed to a body frame and a plurality of mast pipes arranged vertically between masts located in front of the body frame, the pipe being formed on the rear surface side of the oil control valve. Among the upper and lower actuator ports, an elbow type pipe fitting with a small rearward projection amount is installed in the upper actuator port, and a straight type pipe joint with a large rearward projection amount is installed in the lower actuator port. There is.

Pipes are connected to the respective pipe joints, and both pipes are extended from the rear surface of the oil control valve to the lower portion of the vehicle body frame through the lower surface.

Further, hoses are connected to the mast pipes, and the respective hoses are extended downward and their extended ends are connected to the extended ends of the pipes.

(Operation) According to the present invention configured as described above, the substantially straight hose arranged on the front surface side of the oil control valve is displaced forward and backward with respect to the tilt operation in which the mast tilts forward and backward. Corresponding by. Further, since the pipe from the oil control valve to the front surface of the vehicle body frame is formed into a pipe, interference with the outer cross beam of the outer mast existing around the oil control valve, the drive motor, the diff housing or the like is avoided. On the other hand, the upper elbow type pipe fitting that is attached to the oil control valve has a small amount of rearward protrusion, so the gap with the drive motor is widened and the swing width of the spanner when assembling the pipe to the pipe joint is increased. .
Also, since the lower pipe joint is a straight type with a larger amount of rearward projection than the elbow pipe joint, when assembling a pipe, the nut on the nut is not affected by the pipe on the elbow pipe joint side. Since it is possible to hang a spanner and the swinging direction of the spanner is vertical, it is possible to tighten the nut with a large swinging width regardless of the presence of the drive motor.

(Embodiment) An embodiment of the present invention will be specifically described below with reference to FIGS. The oil control valve 1 is disposed on the frontmost end of the vehicle body frame 2, specifically, on the inner surface (rear surface) of the front protector, and is fixed by a bolt 3.
A diff housing 4 is arranged almost directly under the drive motor, and a drive motor 5 is arranged in the lower rear part. Further, a plurality of, for example, two mast pipes 7 are vertically arranged between the left and right masts 6 located in front of the body frame 2, and the mast pipes 7 are normally the outer mast middle cross beams. (Not shown) is appropriately fixed via a bracket, and its upper end is connected to a hydraulic actuator for attachment via a hose (not shown). In FIG. 1, 6a is an outer mast lower cross beam.

Next, the oil control valve 1 and the mast pipe 7
The piping between and will be described with reference to FIGS. 1 and 2.

Of the two upper and lower actuator ports formed on the rear surface side of the oil control valve 1, the elbow type pipe joint 8 is used for the upper side port and the straight type pipe joint 9 is used for the lower side port by means of the lock nuts 10 and 11, respectively. Installed,
Pipes 14 and 15 are connected to the pipe joints 8 and 9 by union nuts 12 and 13, respectively. And both pipes 14,
15 is routed so as to extend from the rear surface of the oil control valve 1 through the lower surface to the front surface of the vehicle body frame 2, and the front end side thereof is welded to and integrated with a plate 16. It is attached by a bolt 19 to a bracket 18 fixed to the body frame 2 by a bolt 17.

Then, the elbow type pipe joint 8 is connected to the pipe.
In order to prevent the 14 from interfering with the straight pipe joint 10, as shown in FIG. 2, the pipe connection side is assembled with an appropriate inclination angle α with respect to the vertical axis. Further, the elbow pipe joint 8 is suppressed to a small amount in the rearward projecting amount, while the straight pipe joint 9 has a larger rearward projecting amount than the elbow pipe joint 8. When the union nut 13 of the straight type pipe fitting 10 is tightened by inserting the wrench from the direction perpendicular to the paper surface of FIG.
I try not to get in the way.

Further, hoses 20 are connected to the lower ends of the two mast pipes 7 via hose fittings 21, respectively, and the hoses 20 extend downward in a substantially straight line,
The extended ends thereof are connected to the extended ends of the pipes 14 and 15 via the hose fittings 22.

In this embodiment, the pipe between the oil control valve 1 and the mast pipe 7 is piped from the oil control valve 1 to the front surface of the vehicle body frame as described above, and the mast 6 tilts forward and backward. Is a substantially straight hose 20 arranged on the front surface of the body frame 2.
Therefore, it is sufficient that the hose 20 is provided with the minimum amount of slack necessary to respond to the tilting motion of the mast 6.
It is possible to avoid a situation where the mast interferes with other members and is damaged due to the displacement caused by the tilting motion of the mast.

When assembling the pipes 14 and 15 to the pipe joints 8 and 9 attached to the oil control valve 1, tighten the union nuts 12 and 13 so that the rearward protruding amount of the upper elbow pipe joint 8 is kept small. As a result, the distance to the drive motor 5 is widened as much as possible. Therefore, when the union nut 12 is tightened by inserting the wrench from a direction substantially perpendicular to the paper surface of FIG. The swing width can be made larger than in the past.

The lower straight pipe fitting 9 is an elbow pipe fitting 8
Since the amount of protrusion to the rear is larger than that of the drive motor 5, the pipe 14 does not get in the way when the spanner is inserted at a right angle to the paper surface and hung on the union nut 13, and the swinging direction of the spanner is the vertical direction. Does not interfere with the nut tightening work by the spanner, so that the mounting order of the pipes 14 and 15 is not specified.

In the present embodiment, the case where the number of attachment pipes is two has been described, but the number of pipes corresponds to the number of actuators. Therefore, if the number of actuators increases, the number of pipes naturally increases. In that case, the actuator ports of the oil control valve 1 are usually arranged in parallel vertically on either the left or right side in FIG. 2, and the piping in that case is similar to the piping described in the embodiment. Applied in. In this embodiment, both pipes
Since 14 and 15 are welded to the plate 16 and integrated, there is an advantage that the handling is convenient and the assembly condition is stabilized, however, the plate 16 can be omitted if necessary. .

(Effects of the Invention) As described in detail above, according to the present invention, the pipe between the oil control valve and the front of the vehicle body frame is piped, and the longitudinal displacement of the substantially straight hose arranged on the front surface of the vehicle body frame is changed. By making the mast tilt motion compatible with the above, it is possible to solve the problem of pipe interference with the peripheral members of the oil control valve. In addition, the use of a pipe eliminates the need for an extra space that takes into account the displacement as in the case of a conventional hose, and since a pipe can have a smaller diameter than a hose, the space between the hose and peripheral members can be reduced. In other words, the space between the oil control valve and the diff housing or drive mote can be made as narrow as possible, which means, for example, that a high performance and large drive motor is used to improve work efficiency. Will also be possible.

Further, when assembling the pipe to the oil control valve, it is possible to easily apply the wrench to the nut of the pipe joint, the spanner can be handled with a large swing width, and the pipe tightening order is not specified. Therefore, the pipe assembling work and the retightening work after the machine base is completed can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, FIG. 3 is a schematic side view of a forklift, and FIG. 4 is a side view showing a conventional piping example. is there. 1 ... Oil control valve 2 ... Body frame 6 ... Mast 7 ... Mast pipe 8 ... Elbow type pipe fitting 9 ... Straight type pipe fitting 14,15 ... Pipe 20 ... Hose

Claims (1)

[Scope of utility model registration request] 1. A pipe between an oil control valve fixed to a vehicle body frame and a plurality of mast pipes arranged vertically between masts located in front of the vehicle body frame. Among the upper and lower actuator ports formed on the rear surface side, the upper actuator port has an elbow pipe fitting with a small rearward projection amount, and the lower actuator port has a large rearward projection amount with a straight pipe fitting. Attach each, connect the pipe to each of the above pipe joints,
Extend these pipes from the rear surface of the oil control valve to the vicinity of the front of the vehicle body frame through the lower surface, connect hoses to the mast pipes, respectively, and extend each hose downward so that the extended ends of the pipes are Forklift attachment piping connected to the extension end.