JPS5848751Y2 - Seido no Tsuchitsuki Sokudo Seigiyoki - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a speed controller with a brake notch, which allows various operations in crane operation to be performed with one handle.

In a crane traveling device, in addition to normal operation control that accelerates or decelerates the crane to a desired traveling speed, and crane stop control that is performed by activating an electromagnetic brake on the electric motor that drives the crane, there is also a control system that supplies power to the electric motor. There are two types of braking: coasting braking, which allows the crane to travel on its own by leaving the brakes free and left to its inertia, and blanking braking, which is a braking method that forcibly applies electrical braking to the electric motor, or rapid braking such as direct current generation braking. It is equipped with a mechanism to control the crane's traveling operation.

Among the control operations described above, normal operation control, crane stop control, and coasting braking are performed by the controller shown in FIG.

This is done by moving the operating lever 1 to A1. By moving in direction B, the bevel gear 3 inside the main body 2 rotates, and the rotation axis 4 of this bevel gear 3 rotates.
Rotating cam 5 attached to rotates.

The outer end of the rotary cam 5 has a rotation angle corresponding to the movement angle of the operating lever 1 (in the case of a crane, a lever notch is provided that is divided into 5 to 6 steps in the A and B directions, respectively, with O as the center). A notch is also provided.

On the other hand, the electrical signal-transmitting switch 6.7 is equipped with a spring-loaded lever 8, 9 with a roller, the roller part of which contacts the outer end of the rotary cam.

Therefore, the rotary cam 5 rotates, and the roller moves into the notch 10.
, the spring-type levers 8 and 9 move by the amount of the cut.

This movement turns the switch on and off, sending electrical signals.

A conventional operating method using such a controller is an automatic blanking braking system.

This means that when the crane operating lever is returned to the 0 position, blanking braking is automatically applied if the speed exceeds a preset value by the speed relay (SP), and this is canceled when the lower limit setting value is reached by the SP. done automatically.

For example, it is set to be turned on in a range of 50% or more of the rated maximum speed of the crane, and switched from on to off in a speed range of 10% or less.

Another operation method is a manual blanking braking method using a foot switch.

However, in the case of the former method, the operation lever is
The automatic blanking cannot be canceled until the speed is reduced to a certain level by returning to the notch, the operation circuit becomes complicated in order to solve this problem, and the control direction once automatically blanked cannot be canceled midway. There are disadvantages such as the inability to change the

In the latter case, the driver can apply the brakes at any time, but there is a problem in terms of space.

That is, since the operator's cabin of a crane requires a minimum space due to its functionality, it is difficult to install only a brake foot switch at the driver's feet, and it is necessary to install an alarm switch or the like.

In addition, it becomes increasingly difficult to install devices such as saws and strippers that have a chamber for viewing directly below the driver's cab.

The purpose of the present invention is to solve the above-mentioned conventional problems and to enable the various operations described above to be performed with one bundle, and to accelerate the forward and backward movement of the crane drive electric motor, and to apply an electromagnetic brake to the electric motor. A disc-shaped swing cam is fixed to a camshaft for controlling the stopping of an operating crane and coasting braking for releasing the brake without applying power to the electric motor, and a bevel gear is fixed to the camshaft. Sudden deceleration braking, such as plunging braking, forcibly applies electric braking to a motor, by attaching a bundle tiltable in the axial direction of a horizontal shaft that supports the gear block to a gear block equipped with a bevel gear portion that meshes with a bevel gear. a switch is disposed opposite to the bundle so that the switch is activated when the bundle is tilted, and an acceleration notch and a coasting notch are disposed in a straight line in the rotating direction of the bevel gear portion of the bundle. The present invention is also characterized in that the rapid deceleration braking notches are disposed parallel to these notches.

The controller of the present invention can be used as either a crane traveling controller or a crane trolley traverse controller that accelerates or decelerates the speed. Acceleration/deceleration operation is performed by operating the controller bundle in the order of stop notch, coasting notch, first acceleration notch, second stage notch, etc., and then returning the bundle to the coasting notch to apply inertia. The operating state is to decelerate, return the bundle to the stop notch, and stop the crane, which is the same bundle operation as before.At the same time, when it becomes necessary to suddenly decelerate the crane during such normal acceleration/deceleration operation, the same The controller bundle is moved from the coasting notch to the free rapid braking notch on the bypass path to achieve sudden braking and deceleration, and from this state it can be returned to the coasting notch for coasting operation, or it can be returned to the stop notch to start the crane. One bundle of controllers can now be used to perform rapid deceleration operations to stop the vehicle.

Next, an embodiment of the present invention shown in FIGS.
A bevel gear 14 fixed to the camshaft 13 meshes with a bevel gear portion 16 of a gear block 15.

A bundle 18 is connected to the gear block 15 via a horizontal shaft 17.
is attached, so that the bundle 18 is tiltable in the axial direction of the fixed horizontal shaft 19 that supports the gear block 15, and the bundle 18 is also tilted in the direction perpendicular to the fixed horizontal shaft 19.
When the bundle 18 is tilted, the gear block 15
and tilt in unison.

As shown in FIG. 2, an opening 21 is formed on a top plate 20 attached to the top surface of the controller box body 11 as a bundle movement path.

This opening 21 allows the bundle 18 to tilt, and also has the function of clarifying and limiting the tilting range of the bundle 18.

The bundle 18 can be moved to each notch in a stepwise manner, and the bundle 18 can be moved stepwise to each notch, and the bundle 18 can be stopped at that position when the hand is released (step type).

Of course, the stepless method (stops at any point from O to 5) and the stepless return method (always returns 0 when you release your hand)
(returning to position) is also considered, but in the case of a crane, a staircase type is better.

22, 22a are the movement paths of the bundle 18 within the opening 21, 23 are notch points on the same path 22.22a, and 0 and Op among the symbols shown at the positions closest to each notch point 23 indicate this control. A stop notch deenergizes the motor controlled and driven by the device and applies the electromagnetic brake of the motor, and a stop notch 0. The left side from OP is a notch for forward movement, and the right side is a notch for backward movement, C, Cb is a coasting notch that releases only the brake without applying power to the motor, 18, 1b to 58, 5. is the acceleration notch from the 1st stage to the 5th stage, P8
．． Pb is a sudden deceleration braking notch.

The path 22 from the stop notch 0 to the fifth stage acceleration notches 5a, 5b is for normal acceleration/deceleration operation, and the above-mentioned free sudden deceleration braking notches Pa, Pb and the stop notch Op are connected from the coasting notches Ca, Cb to the stop notch. Path 22 leading to 0
It is provided on the bypass path 22a.

As described above, the handle 18 tilts around the horizontal axis 17 and the fixed horizontal axis 19, so the arrow A in the figure.

Tilt in directions B and C.

Arrow C is the rotation of the handle along the normal acceleration/deceleration driving path 22, arrow B is the rotation of the handle along the path 22a between the notches Pa, Op, and Pb, and arrow A is the rotation of the handle along the path 22a between the notches Pa, Op, and Pb. , o+Op+ and Cb ” P b
This is the rotation of the handle along each path 22a between.

The rotating cam 12 has a circumferential cam surface 24 and a notch 24a formed in a portion thereof.

Reference numeral 25 denotes an automatic return type controller contactor which is fixedly arranged in the controller box 11 so as to automatically maintain contact with the cam surface 24 of each swing cam 12 by a spring 26. Similarly, 27 denotes a notch Pa.
, 28 is a return spring for the contactor 26, and 29 is an automatic return type controller contactor arranged in the controller box 11 so as to be inserted into contact with the handle 18 when the handle 18 is rotated. Stoppers 30 and 31 in the controller box 11 limit the rotation of the handle 18 in the direction of arrow A, and stoppers 30 and 31 similarly limit the rotation of the handle 18 in the directions of arrows B and C.

32 is a contact lever to which a return force is applied by the spring 27 of each contactor 25, 26, and 33 is a contact roller on the lever 32.

The handle 18 can be moved in the C direction at any time by releasing the hand from the handle 18, and the handle 18 is positioned on the movement path 22a to prevent malfunctions such as turning on the blanking brake circuit at the time of starting, etc. A spring is built in so that when the handle 18 is released, the handle 18 is in a vertical state, and when the handle 18 is released at the OP point, the force of the spring causes it to return to the 0 point.

As shown in FIG. 6, the contacts 32 and 33 are connected to the handle 1
8, the notches Pa and Pb are turned on and rapid deceleration braking is performed, and when the handle 18 moves to the solid line position and leaves, the contacts 32 and 33 are returned to the broken line position by the return spring 26. , the contactor 27 is turned off and the sudden deceleration braking is released.

Similarly, the contactor 25 is turned on when the contactor is pushed in by the cam surface 24, and when it comes into contact with the notch 24a of the cam, it is automatically returned by the force of the spring 26 and turned off.

When the handle 18 is moved along the arrow C, the contactor 25 causes a specified operation to be performed at each notch 0-5a, 5b for normal acceleration/deceleration operation control of the crane.

Note that even if the handle 18 is moved from point 09 toward P8 or Pb, no electrical signal is sent.

When starting the electric motor 2 to start moving the crane, use O-C, -1, -58 or 0-C65b and handle 1.
This is because the brake is applied only when the position 8 is moved.

This is because when the handle 18 is moved to 0pP8, o, or Pb, when blanking braking is applied, the handle 18
This is because the crane is used to moving in the opposite direction compared to the normal direction, and an interlock will be provided in the electrical circuit.

That is, normal movement of the crane is performed only by movement of the handle in the C direction.

Blanking braking or DC power generation braking are used as sudden deceleration braking methods for cranes.

Now, we will explain the case where blanking braking is used for the free sudden deceleration braking of the above-mentioned controller as an example. Normal acceleration/deceleration control involves stopping the steering wheel 18, accelerating from 0 to coasting notch C8, and accelerating from notch 1a to coasting notch C8. 58 to accelerate the crane forward, return the handle 18 to the coasting notch Ca to restore the coasting state, and then return the handle 18 to the stop notch O to stop the crane.

In the case of reversing, the same operation is performed toward the right side in FIG.

In other words, coasting braking is performed when the controller's notch instruction is applied.
Ca, Cb notches, these are OCa or C6
There is no change when the handle 18 is moved in the direction of , but it works effectively when the handle 18 is returned from any of the notches 1 to 5. To move the crane, the handle 18 must be moved. O to 18 to 5. By moving to (1, - 5.), the connector for starting the electric motor (not shown) is turned on, and an electric signal is sent to start the motor.

When the handle 18 is returned to the C-notch from this state, the connector is turned off, the electrical signal is cut off, and the electrical input is turned off.

However, the crane itself moves by inertia.

Therefore, the inertia speed gradually decreases due to running resistance between the wheel bearings and the rails and the wheels.

When the crane is moving forward under such acceleration/deceleration control, if sudden deceleration is required due to excessive acceleration or an obstacle, etc.)
By moving the motor from the coasting notch C8 to the free rapid deceleration braking notch Pa, blanking braking is applied and rapid deceleration is performed.

In this way, blanking braking refers to 13 to 48 or 5a
(1b to 4b or 5b) to Ca (C,) notch, the manual power of the electric motor is turned off, but the crane is in a coasting state, which is opposite to the direction of rotation given to the electric motor by the crane in this state. As a result, the rotor of the motor tries to rotate due to the electrical input to the motor, but since it is mechanically rotated in the direction of rotation from the crane side, it does not respond to the electrical input. As a result, a braking force is generated, the mechanically applied rotational force is weakened, and the coasting of the crane is rapidly reduced.

After the crane is suddenly decelerated, the bundle 18 is stopped by a notch P.
.

When the crane is moved to , the plunging brake is released and an electromagnetic brake is applied to the electric motor to stop the crane.

Also, when the bundle 18 is returned from the free sudden deceleration braking notch P8 to the coasting notch C3, the plunging brake is released and the crane is placed in a decelerated coasting state, and then the crane is stopped by returning the bundle 18 to the stop notch O. You can also drive like you do.

Control of the crane in the backward direction is also carried out in the same manner as described above using the notch on the right side of FIG.

As mentioned above, according to the controller of the present invention, rapid deceleration control of the crane can be performed simply by continuously moving the controller bundle from the coasting notch to the bypass path, rather than using a separate foot switch. Control operations are simplified, easier, and can be performed quickly.

At the same time, the problem that the operation of pressing the foot switch obstructs the view diagonally downward from the driver's cabin is also resolved.

In addition, in addition to suddenly stopping the crane by operating the bundle from the sudden deceleration braking notch to the stop notch, the sudden deceleration braking can be arbitrarily canceled and low-speed coasting operation can be performed by moving the bundle from the sudden deceleration braking notch to the coasting notch. Therefore, even when sudden deceleration braking is required, operation control can be performed to soften the impact of braking, and there are effects such as making it easier to rapidly decelerate and stop the crane accurately at the required stopping position.

[Brief explanation of drawings]

FIG. 1 is a drawing showing a conventional speed controller, where A is a plan view, the opening is a front view, and C is a front view showing the structure of the switch section.
2 is a front view of this, FIGS. 2 to 7 are drawings showing an embodiment of the present invention, FIG. 2 is a plan view of the controller main body, and FIG. 3 is a plan view of the controller main body shown in FIG. 2. , Figure 4 is a side view, Figure 5 is a side view.
6 is a side view of FIG. 5, and FIG. 7 is a plan view of FIG. 5. In the drawings, 12 is a turning cam, 13 is a camshaft, 14 is a bevel gear, 15 is a gear block, 16 is a bevel gear portion, 18 is a bundle, 22, 22a is a moving path, and 23 is a notch point.

Claims (1)

[Scope of utility model registration request] A disc-shaped swing cam that controls forward and backward acceleration of a crane driving electric motor, stopping of the crane by applying an electromagnetic brake to the electric motor, and coasting braking that does not apply power to the electric motor and releases the brake. A handle is fixed to a camshaft, a bevel gear is fixed to the camshaft, and a handle is attached to a gear block having a bevel gear portion meshing with the bevel gear so as to be tiltable in the axial direction of a horizontal shaft supporting the gear block; A switch for rapid deceleration braking, such as blanking braking, which forcibly applies electrical braking to the electric motor, is disposed opposite to the handle, and the switch is activated when the handle is tilted, and the bevel gear portion of the handle is rotated. 1. A speed controller with a braking notch, characterized in that an acceleration notch and a coasting notch are arranged in a straight line in the direction of movement, and the rapid deceleration braking notch is arranged parallel to these notches.