Braking device for track-traveling machines

Abstract

To provide a braking device of a track traveling type machine capable of simplifying and miniaturizing a structure by reducing the number of component parts and of reducing cost.SOLUTION: A braking device 40 of a track traveling type machine (a container crane 10) includes an equalizer beam 32 on which traveling wheels 31 freely rolling along a traveling rail Rx are provided, and presses a brake pad 41, which is mounted on a lower surface of a pressing frame 43, against the traveling rail Rx to perform braking by telescopic operation of a fluid pressure cylinder 42 provided on the equalizer beam 32. The braking device includes: a support bracket 32b projected from a side surface of the equalizer beam 32 and mounted with the fluid pressure cylinder 42; and a cutout part 33 formed on a lower part of the equalizer beam 32 to be engaged with the pressing frame 43 and receiving horizontal force in the longitudinal direction of the traveling rail Rx acting on the pressing frame 43 in performing braking.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a braking device for a track-traveling machine. [Background technology]

[0002] Generally, as shown in FIG. 5, a container crane 10 as a track-traveling machine installed on a traveling rail Rx on a quay Q of a port H has a lower frame 22 extending parallel to the traveling rail Rx so as to connect the lower ends of the support legs 21 of the main frame 20, and is provided with a traveling device 30 and a braking device 40.

[0003] The traveling device 30 has traveling wheels 31 that can roll freely along traveling rails Rx, and is driven to rotate by a motor (not shown).

[0004] The braking device 40 applies braking by pressing a brake pad 41 against the traveling rail Rx.

[0005] A total of four support legs 21 are erected, two on the land side and two on the sea side, and the upper parts of the land-side and sea-side support legs 21 are connected by a connecting frame 23 extending in a direction intersecting with the traveling rail Rx.

[0006] A girder 50 is provided on the upper part of the main frame 20, extending horizontally from the land side to the sea side, and a boom 60 is attached to the tip of the girder 50, extending on its extension line.

[0007] A lateral rail Ry is laid on the girder 50 and the boom 60, and a trolley 70 that lifts and lowers a load C (container) travels lateral along the lateral rail Ry.

[0008] In recent years, in track-traveling machines such as the container crane 10, there has been an increasing demand for the brake device 40 to be provided below the traveling device 30 in order to deal with cases where it is not possible to provide the brake device 40 below the lower frame 22.

[0009] Incidentally, for example, Patent Document 1 shows the general technical level of a braking device provided below the traveling device in a track-traveling machine. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Publication No. 2019-116339 Summary of the Invention [Problem to be solved by the invention]

[0011] However, in the braking device shown in Patent Document 1, it is necessary to separately attach a fixed frame to the equalizer beam, which increases the number of parts, leading to a complicated structure and increased costs, and therefore improvements were desired.

[0012] Furthermore, in the case of the braking device of Patent Document 1, the horizontal force in the longitudinal direction of the running rail that occurs during braking is received by a stopper portion provided on the fixed frame, and this stopper portion is a factor that hinders compactness.

[0013] The present invention has been made in consideration of the above-mentioned problems of the conventional technology, and aims to provide a braking device for a track-traveling machine which can reduce the number of parts, thereby simplifying and compacting the structure and reducing costs. [Means for solving the problem]

[0014] The present invention relates to a braking device for a track-traveling machine, which includes an equalizer beam on which traveling wheels that can roll along a traveling rail are disposed, and which applies braking by pressing brake pads attached to the underside of a pressing frame against the traveling rail when a fluid pressure cylinder disposed on the equalizer beam is extended, and the equalizer beam The side plate that supports the wheel axle ina support bracket protruding from a side surface and to which the fluid pressure cylinder is attached; of the equalizer beam At the center of the running rail lengthwise at the bottom of the side plate a notch formed to engage with the pressure frame and to receive a horizontal force in the longitudinal direction of the traveling rail acting on the pressure frame during braking; This relates to a braking device for a track-traveling machine equipped with the above.

[0015] In the braking device for the track-traveling machine, the support bracket can be configured so that a body bracket of the cylinder body of the fluid pressure cylinder is connected by a support pin, and the tip of the piston rod extending from the cylinder body is connected to a connecting bracket on the top surface of the pressure frame by a connecting pin. [Effects of the Invention]

[0017] According to the braking device for a track-traveling machine of the present invention, the number of parts can be reduced, thereby simplifying and downsizing the structure, and the cost can be reduced, which are excellent effects that can be achieved. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is an exploded perspective view showing an embodiment of a braking device for a track-traveling machine according to the present invention; [Figure 2] 1 is an assembled perspective view showing an embodiment of a braking device for a track-traveling machine of the present invention; [Figure 3] 1 is a front view showing an embodiment of a braking device for a track-traveling machine according to the present invention; [Figure 4] 1 is a front view showing a braking state in an embodiment of a braking device for a track-traveling machine of the present invention. FIG. [Figure 5] FIG. 1 is a perspective view showing an example of a container crane as a general track-traveling machine. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0020] 1 to 4 show an embodiment of a braking device for a track-traveling machine according to the present invention, and in the figures, parts that are given the same reference numerals as in FIG. 5 represent the same things.

[0021] In this embodiment, the traveling device 30 of the container crane 10 as a track-traveling machine is configured by arranging traveling wheels 31 on an equalizer beam 32 so that they can roll freely along the traveling rails Rx, and a fluid pressure cylinder 42 and a pressing frame 43 that constitute a braking device 40 are arranged on the equalizer beam 32.

[0022] More specifically, a support bracket 32b protrudes from the side of the side plate 32a of the equalizer beam 32 that supports the wheel axle of the running wheel 31, and the main body bracket 42b of the cylinder main body 42a of the fluid pressure cylinder 42 is connected to the support bracket 32b by a support pin 44.

[0023] The tip of a piston rod 42c extending from the cylinder body 42a is connected by a connecting pin 45 to a connecting bracket 43a on the upper surface of a pressure frame 43, and a brake pad 41 is attached to the lower surface of the pressure frame 43.

[0024] A notch 33 that engages with the pressing frame 43 is formed in the center of the longitudinal direction of the traveling rail Rx at the bottom of the side plate 32a of the equalizer beam 32, and the notch 33 is adapted to receive a horizontal force F (see Figure 4) in the longitudinal direction of the traveling rail Rx that acts on the pressing frame 43 during braking.

[0025] Next, the operation of the above embodiment will be described.

[0026] As shown in Figures 2 and 3, when the fluid pressure cylinder 42 is contracted and the piston rod 42c is retracted into the cylinder body 42a, the pressing frame 43 is pulled upward, the brake pad 41 integrated with the pressing frame 43 moves away from the upper surface of the traveling rail Rx, the braking is released, and the container crane 10 becomes able to travel.

[0027] In contrast, as shown in FIG. 4, when the fluid pressure cylinder 42 is extended and the piston rod 42c is pushed out from the cylinder body 42a, the pressing frame 43 is pressed downward, and the brake pads 41 integrated with the pressing frame 43 are pressed against the upper surface of the traveling rail Rx, braking is performed, and the container crane 10 stops.

[0028] At this time, if the container crane 10 is blown by a strong wind or the like and tries to move along the traveling rail Rx, a horizontal force F acts on the pressing frame 43 in the longitudinal direction of the traveling rail Rx, but this horizontal force F is received by the notch 33 formed in the side plate 32a of the equalizer beam 32.

[0029] As a result, in the case of this embodiment, unlike the braking device shown in Patent Document 1, there is no need to separately attach a fixed frame to the equalizer beam 32, which reduces the number of parts, simplifies the structure, and avoids increased costs.

[0030] Furthermore, the stopper portion of the fixed frame that is required in the braking device of Patent Document 1 to receive the horizontal force F in the longitudinal direction of the traveling rail Rx that occurs during braking is not required in this embodiment, making it possible to make the device more compact.

[0031] In this way, the number of parts can be reduced, the structure can be simplified and made compact, and costs can be reduced.

[0032] The braking device for track-traveling machines of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0033] 10 Container crane (track-traveling machine) 20 Main frame 21 Support legs 22 Lower frame 23 Connecting Frame 30 Running gear 31 Running wheels 32 Equalizer Beam 32a side plate 32b Support bracket 33 Notch 40 Braking device 41 Brake pads 42 Fluid pressure cylinder 42a Cylinder body 42b Main unit bracket 42c piston rod 43 Pressing Frame 43a Connecting bracket 44 Support pin 45 connecting pin 50 Guarda 60 Boom 70 Trolley C Hanging load F horizontal force H port Q Quay Rx running rail Ry traverse rail

Claims

1. A braking device for a track-traveling machine includes an equalizer beam on which traveling wheels that can roll along a traveling rail are disposed, and brakes are applied by pressing brake pads attached to the underside of a pressing frame against the traveling rail by extending a fluid pressure cylinder disposed on the equalizer beam, a support bracket that projects from a side surface of a side plate of the equalizer beam that supports the wheel axle, and to which the fluid pressure cylinder is attached; a notch formed in the center of the longitudinal direction of the traveling rail at the lower part of the side plate of the equalizer beam so as to engage with the pressing frame and to receive a horizontal force in the longitudinal direction of the traveling rail acting on the pressing frame during braking; A braking device for a track-traveling machine equipped with the above.

2. 2. The braking device for a track-traveling machine according to claim 1, wherein the support bracket is connected to a body bracket of the cylinder body of the fluid pressure cylinder by a support pin, and a tip end of a piston rod extending from the cylinder body is connected to a connecting bracket on the top surface of the pressure frame by a connecting pin.

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