JPS5943386B2 - Rail brake for traveling crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rail brake for running lanes that is capable of reliably and stably applying the brakes in response to runaway of outdoor lanes during cargo handling, regardless of the shape of the rail.

If a lane runs outdoors due to gusts or storms, it is likely to lead to major accidents such as derailment or capsizing, so these cranes should of course be equipped with holding devices for when the crane is closed.
Braking equipment for cargo handling is also an essential safety feature.

A rail clamp is usually used as a conventional brake device of this type, but it is impossible to clamp the rail in the case of a specially shaped rail, an embedded rail, or a rail with a lead-in branch line. be.

Furthermore, as shown in FIG.
There is a brake device that presses the shoe 103 against the rail 104 with a spring force of 1, but this device has the following problems.

(1) Since the shoe 103 is pressed by a spring force, it is not suitable for large-capacity products, and the external shape becomes large.

(2) Link 102 against braking force depending on the direction
The mechanism becomes unstable.

The present invention solves the problems of the conventional device described above, and provides a rail brake for running lanes that can reliably and stably apply the brakes regardless of the shape of the rail when the lane runs out of track during cargo handling. The gist is that the brake shoes are attached to one end of a pair of left and right arms via connecting pins, and are held down by a support frame fixed to a rail body running on all sides, and the other end of the arm is are rotatably fitted into the axial center portion of the eccentric shaft, and the eccentric shaft is fixed to one end of the lever and positioned and held by a bearing attached to the support frame,
The links are connected via pins to the other end of the lever and the tip of the cylinder ring of the central cylinder device held by the bracket, and the downward stroke of the arm during braking is controlled by the brake shoe when the crane is running. and a rail brake for a running lane configured to be larger than the gap between the upper surface of the running rail.

Next, the present invention will be explained with reference to the drawings.

2 is a front view of the embodiment of the present invention when the vehicle is running in a lane, FIG. 3 is a front view of the embodiment shown in FIG. A view in the direction of arrow A, FIG. 5 is an explanatory diagram of the cylinder at the eccentric portion of the eccentric shaft in the embodiment shown in FIG. 2 at the start of retraction, and FIG. It is an explanatory view at the time of completion of retraction.

First, the configuration of this embodiment will be described.

FIG. 2 is a front view showing the running state of the lane in which the present embodiment runs, and the brake shoe 1 is connected to the running rail 15.
The presser foot is moved up and down by a support frame 11 that is attached to one end (lower end) of the pair of left and right arms 2 via connecting pins 8 so as to leave a slight gap between them and the upper surface, and that is fixed on all sides to the crane body 14. only possible.

The other end (upper end) of this arm 2 is rotatable.
By incorporating a bushing or bearing, etc., and fitting it into the eccentric portion of the eccentric shaft 3, and fixing the lever 4 to the eccentric shaft 3 at one end using a key or spline, etc., the eccentric shaft 3 can be rotationally driven. , the cylinder of an upward hydraulic cylinder 7, which is positioned and held by a bearing 12 attached to a support frame 11, and whose link 5 is held by the other end of the lever 4 on both sides and the bracket 13 via pins 9 and 10, respectively. It is connected to the tip of the rod 6, and the downward stroke of the arm 2 during braking is wider than the gap between the brake shoe 1 and the upper surface of the travel rail 15 when the crane is running.

Next, the operation of this embodiment will be described.

In the above configuration, when the cylinder rod 6 is retracted by an external operation, for example, by hydraulic pressure sent from a pump unit, the link 5 connected to the tip pushes down the lever 4 and moves the eccentric shaft 3 as shown in FIG. Rotate in the R direction.

Since the eccentric part axis (point b) of the eccentric shaft 3 is provided at the position shown in Fig. 5 with respect to the rotation center (point a), the eccentric part axis (point b) moves downward due to the rotation. , push down the arm 2 whose one end is fitted into the eccentric part.

In FIGS. 4 and 5, T and T' indicate the direction of torque, and X indicates the arm axis, respectively.

The brake shoe 1 connected to the other end of the arm 2 has a gap (S shown in FIG. 4) with the upper surface of the rail 15 that is smaller than the downward stroke of the arm 2 during braking, so the push of the arm 2 is The upper surface of the rail 15 is reached in the middle of the downward stroke, and with the remaining stroke, the crane body 14 is pushed up via the arm 2, eccentric shaft 3, eccentric shaft bearing 12, and support frame 11, and the crane body 14 is pushed up by the six dimensions shown in FIG. The brake shoe 1 is pressed against the upper surface of the rail 15 by the weight of the crane main body 14 that has been pushed up.

Thus, F tries to deviate from the lane in which he is running.

F' acts on the brake shoe 1 via the support frame 11, and the brake is applied by resisting the frictional force between the brake shoe 1 pressed against the upper surface of the rail 15 and the upper surface of the rail 15, preventing the crane from running away. Prevented quickly and reliably.

In order to release the brake, the cylinder rod 6 is pushed up, causing each part to move in the opposite direction, and the brake shoe 1 lifts off the upper surface of the rail 15, allowing the crane to travel.

In the above, the case where the hydraulic cylinder 7 is provided facing upward has been described, but the hydraulic cylinder 7 may also be provided downward and push down the link 5, or two cylinders from the sides may be used, or the screw by an electric motor may be used. It may be a type cylinder or a screw type cylinder with a manual handle.

The effects of the present invention are as follows.

(1) By incorporating an eccentric shaft into the link mechanism, the link mechanism system is stable against braking force.

(2) At the end of the arm stroke, as shown in Figure 6, the eccentric shaft is rotated to a position where the axial direction of the arm slightly exceeds the dead center with respect to the center of rotation of the eccentric shaft. The torque direction changes from T to T', and the force on the cylinder changes from a tensile force to a pushing force.By receiving this force with a stopper, etc., the crane body is stably maintained in the upwardly pushed state, and the crane The braking effect against runaway is reliably maintained.

(3) Since the weight of the crane body is used as force for pressing the brake shoes, the external shape can be made compact.

As described above, the present invention uses a combination of a link mechanism incorporating an eccentric shaft and a cylinder mechanism to push up the crane body and press the brake shoes against the rail with its own weight, thereby preventing the rail from running out of lane. The present invention provides a rail brake for traveling cranes that exhibits a reliable and stable braking effect regardless of the shape of the crane, and its industrial value is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a front view of an example of a conventional rail brake device for lanes, FIG. 2 is a front view of an embodiment of the present invention when the lane is running, and FIG. 3 is a front view of the embodiment of the embodiment of FIG. 4 is a view taken in the direction of arrow A in FIG. 2; FIG. 5 is an explanatory view when the cylinder of the eccentric portion of the eccentric shaft in the embodiment shown in FIG. 2 starts to retract; FIG. This figure is an explanatory diagram of the eccentric portion of the eccentric shaft in FIG. 5 when the cylinder has finished being retracted. In the figure, 1...brake shoe, 2...
...Arm, 3...Eccentric shaft, 4...
Lever, 5...Link, 6...Cylinder rod, 7...Hydraulic cylinder, 8.9.10
......Connecting pin, 11...Support frame, 1
2... Eccentric shaft bearing, 13... Cylinder mounting bracket, 14... Crane body, 15
・・・・・・Running rail, a・・・Rotation center,
b...Eccentric part axis, R...Rotation direction,
T, T'...Torque direction, X...Arm axis, 101...Spring, 102...
・Link, 103... Shoe, 104...
··rail.

Claims (1)

[Claims] 1. Brake shoes are attached to one end of a pair of left and right arms via connecting pins, and are held by a support frame fixed to the main body of the lane running on all sides, and the other ends of the arms are rotatably attached to the eccentric portion of the eccentric shaft. A cylinder in the central part is fitted, and the eccentric shaft is fixed to one end of the lever, and is positioned and held by a bearing attached to the support frame, and the link is held by the other end of the lever and the bracket through pins, respectively. A rail brake for a running lane, which is connected to the tip of a cylinder rond of a device and configured so that the downward stroke of the arm during braking is larger than the gap between the brake shoe and the upper surface of the running rail when the crane is running.