JPS5842092Y2 - Control lock device for concrete mixer vehicle - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a control lock device for a concrete mixer vehicle that controls drum rotation using a manual lever.

When the concrete mixer truck is running, the driver operates a control lever to set the drum rotation to an optimal position, especially if the concrete mixer truck is equipped with a constant drum speed device.

However, the set control position may be changed due to the rear manual lever coming into contact with a tree or other obstacle, or due to incorrect operation of the control lever inside the cab, resulting in an unexpected over-rotation or reverse rotation of the drum (ejection of ready-mixed concrete). There was a risk that this could lead to a situation of

For this reason, a mechanical locking device was attached to the control lever inside the cab so that the driver could lock the control lever inside the cab, and a similar device was sometimes attached to the rear control lever.

FIG. 1 shows a schematic explanatory diagram of this type of mechanical locking method, where A shows the normal state and B shows the malfunction state due to external force.

In the figure, 1 is the rear control lever, 1A is the control lever inside the cab, 2 is the connecting rod, 3 is the pump,
3A is a pump lever, and 4 is a lock provided on the control lever 1A inside the cab.

At present, the control lever IA in the cuff is fixed with lock 4.

For this reason, when an external force F acts on the rear control lever 1, the rod 2 connected in this order to the pump 3 and the control lever 1A inside the cab is deflected A or within the range of play in the connection part, and the pump lever 3A is operated and malfunctions. produces B.

Incidentally, even when the rear control lever 1 is locked, a similar malfunction occurs in the pump lever 3A when the in-cab control lever 1A is erroneously operated.

Therefore, in order to overcome the above-mentioned drawbacks, the cab and rear connecting rods 2 or wire cables must be strengthened to a level greater than that required for normal operating forces.

In addition, it is considered that the locking point should be installed near the pump lever, but in order to lock and release the lock, the driver must move to the position of the pump 3 separately from the inside of the cab or the rear control levers 1 and 1A. I had to do a lock operation.

In addition, when driving, press the control lever 1A inside the cab.
By operating the pump lever 3A, the optimum drum rotation speed is obtained.

At this time, the control lever 1A must be operated depending on the feel of the detent mechanism that semi-forces the position of the pump lever 3A, which poses a problem in the operability of the in-cuff control lever 1A.

In view of the above-mentioned points, the present invention eliminates the drawbacks of the conventional technology, makes the control lever easy to handle, ensures the position of the pump lever for optimal drum rotation during driving, and semi-automatically locks the concrete mixer truck. The purpose of this invention is to provide a control lock device for

According to the present invention, the lock plate is interposed between a manual lever and a pump lever and has a first connecting part connected to the manual lever and a second connecting part connected to the pump lever; A locking means is provided between the locking plate and a solenoid provided corresponding to the locking plate, and locking the locking plate when the pump lever is at an optimal position for rotation of the drum during travel. be done.

Next, embodiments of the present invention will be described in detail based on the drawings.

FIG. 2 shows a schematic diagram of an embodiment of the present invention.

In the figure, the lock plate 5 is provided with connecting portions 9, 15 and a lock hole 10.

The connecting portion 9 is connected via a rod 8 to a pump lever 3 (not shown) in the direction of the arrow P1.

Further, the connecting portion 15 is provided at the other end of the shaft body 6 whose one end is fixed to the plate surface of the lock plate 5, and is provided in the direction of the arrow P2. P3
It is connected to control levers 1 and 1A (not shown).

The lock hole 10 is provided in the plate surface of the lock plate 5, and together with the lock shaft 11 forms a locking means.

Reference numeral 14 designates a lock guide for the lock shaft 11 that operates when the solenoid 12 is energized or de-energized.

Further, 16 is a fixing base for fixing the solenoid 12 and the lock guide 14.

Next, FIG. 3 shows an explanatory diagram of the operation of FIG. 2, in which A is a unlocked state, B is a lockable state, and C is a locked state.

In the figure, parts having the same functions as those in FIG. 2 are given the same reference numerals.

Solenoid 12 is an electrical component that converts electrical energy into mechanical linear motion.

This solenoid 12 is provided in a direction perpendicular to the plate surface of the lock plate 5, and performs the lock opening/closing operation by the lock hole 10 and the lock shaft 11.

That is, when the solenoid 12 is energized, the lock shaft 11 is disengaged from the lock (Llo), and the lock is released.

Therefore, the in-cab and rear control levers 1,1
By operating the pump lever 3A using A,
Drum rotation is controlled.

When the solenoid 12 is de-energized when the concrete mixer truck is running, the lock shaft 11 moves toward the lock plate 5 due to the elasticity of the spring 13.

When the pump lever 3A reaches the position where the optimal drum rotation speed is obtained by operating the in-cab control lever 1A, the lock hole 10 is semi-automatically locked by the lock shaft 11 to maintain the optimum drum rotation.

Next, FIG. 4 shows an operating circuit diagram of the solenoid.

In the figure, switches 17 and 17A are provided in the cab and near the rear control levers 1 and 1A, and are connected to one solenoid 12 to provide on/off operation to the solenoid 12.

Pilot lamp 18.18 is switch 17.17 A
This is a display to confirm the operating status.

19 is a power supply, and 20 is a fuse. As explained above, according to the present invention, by providing a locking means that locks the lock plate when the pump lever is at the optimal position for drum rotation during traveling, the position of the pump lever is ensured, and semi-automatic It has the advantage of being easily locked and easy to handle.

In this embodiment, the lock means includes a lock hole provided on the surface of the lock plate, and a lock shaft that is inserted into and removed from the lock hole by being operated by a solenoid provided perpendicularly to the surface of the lock plate. However, the invention is not limited to this, and is operated by a notch provided on the peripheral edge of the lock plate and a solenoid provided parallel to the outer edge of the lock plate. , a similar effect can be obtained by comprising a lock shaft that is inserted into and removed from the notch.

[Brief explanation of the drawing]

FIG. 1 shows a schematic explanatory diagram of this type of mechanical locking method, where A is the normal state, B is the malfunction state due to external force, and the second
The figure is a schematic configuration diagram of an embodiment of the present invention, and FIG. 3 is an explanatory diagram of the operation of FIG. 2, where A is a unlocked state, B is a lockable state, C is a locked state, and FIG. It is an operation circuit diagram. 1: Control lever, IA:'e control lever inside, 5: Lock plate, 9, 15: Connection part,
10: Lock hole, 11: Lock shaft, 12: Solenoid, 13 Spring, 14: Lock guide.

Claims (1)

[Scope of utility model registration request] In a concrete mixer vehicle in which drum rotation is controlled by operating a pump lever using a manual lever, a first connecting part interposed between the manual lever and the pump lever and connected to the manual lever and the pump lever are provided. The pump lever is provided between a lock plate having a second connecting portion and a solenoid provided corresponding to the lock plate, and when the pump lever is at the optimum position for rotation of the drum during traveling, A control locking device for a concrete mixer vehicle, characterized by comprising a locking means for locking a locking plate.