JPS63272798A - Mounting structure of oil discharger for load push-pull of forklift - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention: Industrial Application Field The present invention is capable of pulling up or pushing out items on a slip sheet onto or from the pawl of a fork by moving the face forward and backward on the pawl of a fork. Tekan? LE RESIDENT OPERA
This invention relates to a mounting structure for a load push/pull oil discharger for a forklift truck equipped with a pull device.

Among the forklifts with conventional technology push-pull equipment,
Synchronous control of the forward and backward movement of the face and the forward and backward movement of the vehicle body is disclosed in, for example, Japanese Utility Model Application No. 58-4599, Japanese Utility Model Application No. 58-4600, and Japanese Utility Model Application No. 58-779.
Many are known, such as Publication No. 7.

Problems to be Solved by the Invention Hydraulic oil is supplied to the push-pull device by a motor-driven or engine-driven pump, so the push-pull device is operated in synchronization with the longitudinal movement of the vehicle body. It becomes difficult to control the hydraulic oil supply to achieve this. Therefore, the present invention provides a mounting structure for a forklift load push/pull oil discharge device that can supply hydraulic oil to the push/pull device according to the longitudinal movement of the vehicle body and easily perform synchronized control. This is Surushino.

Measures to solve the problem A push roller placed at the front of the vehicle body by rotating a driven roller.
An oil discharge device that supplies hydraulic oil to the pull device is supported on the vehicle body side, and the oil discharge device is mounted by elastically pressing the driven roller against the outer periphery of the wheel of the forklift using a biasing means, and when the forklift is normally driven. A flip-up means is provided for flipping up the oil discharger and separating the driven roller from the wheel.

A driven roller rotates in accordance with the rotation of the working wheel, and as the driven roller rotates, hydraulic oil is supplied from the oil discharger to the push-pull device. During normal travel of the forklift, the oil discharge device is flipped up by the flip-up means, and the driven roller is separated from the wheels.

Example Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 and 2, l indicates an oil discharger equipped with a driven roller 3, and this oil discharger l is swingably supported by connecting one end of the base plate 2 to the vehicle body 14 side, for example, the mast 16 with pin 4. It is. A biasing means 5 such as a known rubber spring is interposed in the connecting portion of the pin 4, and this biasing means 5 biases the base plate 2 clockwise in FIG. is elastically pressed against the outer periphery of the wheel W. The driven roller 3 is pivotally supported by the base plate 2, and a belt 6 is suspended between its rotational output section 3a and the rotational input section 1a of the oil discharger l, and the rotation of the driven roller 3 increases the required speed. Oil dispenser 1
It is designed to drive. Reference numeral 7 indicates a means for flipping up the oil discharge device 1, and in this embodiment, a bushing rod 8 is provided protruding from the front end of the frame 15 of the vehicle body 14, and when the mast 16 is tilted backward when the forklift is normally driven, the bushing rod 8 is raised at the end of the bushing rod 8. The lower side edges of the base plate 2 abut against each other, so that the oil discharger 1 can be flipped up together with the base plate 2 around the connecting point of the pin 4. FIG. 5 shows the push-pull device 17 located at the front of the vehicle body 14 and its hydraulic circuit. The oil discharger 1 described above consists of a pump 9 driven by a driven roller 3 that rotates in accordance with the rotation of the wheel W, and a switching valve IO that switches in conjunction with forward and reverse rotation of the pump 9. The supply of hydraulic oil to the push-pull device 17 is controlled by the switching operation of the switching valve IO. The rotation input section 1a of the oil discharger l includes:
An electromagnetic clutch II is provided which is disconnected and engaged via a controller 13 by operating a synchronous operation switch 12.During normal driving, this electromagnetic clutch 11 is disconnected and the oil discharger l
is no longer working. Push-pull device 1
7 is a push/pull cylinder 1 that moves the face 20 forward and backward on the fork 21 by compressing the link mechanism 19;
8 is connected in parallel with the push/pull cylinder 18 to grip a slip sheet (not shown).

and a gripper 22 for releasing. 23 is a sequence valve that grips and operates the gripper 22 prior to the pull operation of the push/pull cylinder 18, and 24 is a sequence valve that throttles the amount of hydraulic oil supplied to the gripper 22 side when the vehicle body 14 moves backward to immediately activate the push/pull cylinder 18. Flow IF [valve control, 25 is the oil discharger 1 and the push-pull device 1
7 is operated via the controller 13 based on the detection action of the face movement m detector 26 and the vehicle body movement amount detector 27. When the backward movement is faster than the forward movement of the vehicle body 14, the valve is opened and the amount of hydraulic oil supplied to the push-pull device 17 is reduced to synchronize the backward movement of the face 20. 26 is a push-pull device 17. Lift cylinder 27. A control valve for manually controlling the tilt cylinder 28, each having its own push/pull valve 29. A lift valve 30 and a tilt valve 31 are also provided. In this embodiment, the aforementioned switching valve IO of the oil discharger 1 is communicated and connected to the hydraulic oil carry-over circuit 32 of this control valve 26, so that the hydraulic oil carried over from the control valve 26 is supplied to the oil discharger 1. h by manually operating the control valve 26 even when the synchronous mode is in operation.
This is so that priority can be given to normal operation. 33 is a power steering cylinder; 34 is a switching valve; 35 is a diversion valve that divides hydraulic oil into the control valve 26 side and the switching valve 34 side; 36 is a pump driven by the engine 37;
38 is a reservoir tank.

According to the above embodiment, when the vehicle body 14 is moved straight ahead or backward to take in or unload cargo, the driven roller 3 of the oil discharge device I slides into contact with it and makes two rotations due to the rotation of the wheels W. Wheel W from discharge device 1 to push-pull device 17
The hydraulic oil can be supplied in proportion to the rotation of the vehicle body 14, that is, in proportion to the longitudinal movement of the vehicle body 14, and the longitudinal movement of the vehicle body 14 and the push-pull operation of the push-pull device 17 can be appropriately synchronized. can. Since the driven roller 3 of the oil discharger 1 is pressed against the outer periphery of the wheel W by the urging means 5 as described above, the drive ratio can be kept constant regardless of the wear of the wheel W. A constant driving force can always be applied to the oil discharger l even if it is worn out. In addition, when a foreign object is caught in the tread of the wheel W, when the driven roller 3 gets over it, the oil discharger l is at the mast 1.
Since it can swing around the connection point with 6, it is possible to protect the oil discharger 1 without giving an impact to the oil discharger 1. When the forklift is driven normally after the above-mentioned push-pull operation, the tilt cylinder 28 is operated to maintain the mast 16 in a backward tilted position, but when the mast 16 tilts backward, the bushing rod at the front end of the frame 15 8, the side edge of the base plate 2 of the oil discharge device 1 abuts against the oil discharge device 1, and the oil discharge device 1 is flipped up together with the base plate 2, and the driven roller 3 is separated from the wheel W.

Therefore, the driven roller does not rotate at a high speed on the wheel W during normal running and does not apply an impact to the oil discharger 1, and the durability of the oil discharger 1 can be improved.

In the above embodiment, a push rod 8 is used as the flip-up means 7.
However, as shown in FIGS. 3 and 4, it is also possible to use a hydraulic cylinder 39 to flip up the oil discharge IT together with the base plate 2 during normal running. Also,
As the biasing means 5, a coil spring can also be used in addition to the above-mentioned rubber spring.

Effects of the Invention As described above, according to the present invention, the oil discharger is mounted by elastically pressing its driven roller against the outer periphery of the wheel of the forklift by the urging means, so that the driven roller responds to the rotation of the wheel. This allows the oil discharge device to supply hydraulic oil to the push-pull device in proportion to the back-and-forth movement of the car body, thereby ensuring that the back-and-forth movement of the car body and the push-pull operation of the push-pull device are properly controlled. can be synchronized. Moreover, since the driven roller is in elastic contact with the wheel,
The drive ratio can be kept constant regardless of wheel wear,
Moreover, even if the wheels are worn out, a constant driving force can always be applied to the oil discharger. Furthermore, when a foreign object gets caught in the wheel and the driven roller overcomes it, the biasing means can absorb the impact and protect the oil ejector. Furthermore, 1 tatami mat of forklift, :F, 1. -1 move head posture μ
Since the driven roller can be lifted up and separated from the wheel, the driven roller will not rotate at high speed on the wheel, improving the durability of the oil dispenser. This has a great practical effect.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the present invention, Fig. 2 is a side view showing the operating state of the flip-up means, Figs. 3-4 are side views showing the operating state of a different example of the present invention, FIG. 5 is a hydraulic circuit diagram showing the relationship between the oil discharger and the push/pull device. DESCRIPTION OF SYMBOLS 1... Oil discharger, 3... Followed roller, 5... Urging means, 7... Flip-up means, 14... Vehicle body, 17.
...Push-pull device, W...Wheel. 2 people outside

Claims (1)

[Claims] (1) An oil discharge device that supplies hydraulic oil to a push/pull device located at the front of the vehicle body by the rotation of the driven roller is supported on the vehicle body side, and the driven roller is driven by a forklift truck using a biasing means for the oil discharge device. For load push/pull of a forklift truck, characterized in that the oil discharge device is attached elastically to the outer periphery of the wheel of the forklift truck, and a flip-up means is attached for flipping up the oil discharger to separate the driven roller from the wheel during normal running of the forklift truck. Installation structure of oil discharge device.