JP2001240369A - Safety against for travelling crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety against wind for travelling cranes capable of freely improving the braking force of a travelling crane. SOLUTION: A brake shaft 33 is arranged near the axle 32 of driven wheels 8b provided in the travelling crane, and the axle 32 and the brake shaft 33 is connected to each other though transmission gears 35 and 36 meshing each other between the axle 32 and the brake shaft 33, and a rotary disk 37 is fixed to the brake shaft 33 so as to be capable of applying braking by means of a disk brake 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an escape prevention device for a traveling crane, and more particularly to an escape prevention device for a traveling crane which can maintain a high braking force to prevent the traveling crane from running when the traveling crane is stopped. It is about.

[0002]

2. Description of the Related Art FIG. 4 is a schematic structural view showing an example of a traveling crane 1 (container crane) used as an example of a traveling crane installed in a port or the like for loading and unloading cargo such as containers. is there. In FIG. 4,
A seaside rail 6 and a landside rail 7 are provided on a quay 5 facing the harbor 4. The traveling crane 1 includes a traveling section main body 11 and rails 6 and 7 on the sea side and the land side.
And a traveling unit 3 for traveling along. The traveling section 3 is provided with a pair of front and rear support legs 9 and 10 on the sea side and the land side below the traveling section main body 11, and the lower ends of the support legs 9 and 10 roll on the rails 6 and 7, respectively. A rocker device 2 having a plurality of wheels 8 is mounted.

[0003] In FIG. 4, the land-side support legs 10 have a rigid leg structure with respect to the traveling unit main body 11, whereas the sea-side support legs 9 are connected to the traveling unit main body 11 with each rail 6. , 7 are pivotally supported so as to be pivotable about a pivot pin 12. The traveling unit main body 11 includes a horizontal beam 11.
a, a beam 11b in an oblique direction, etc., and a crane unit 13 for loading a load, etc.
It is a structure attached to the upper side of.

FIG. 5 shows an example of the rocker device 2 provided at the lower end of each of the support legs 9 and 10.

[0005] As shown in FIG. 5, the rocker device 2 includes rails 6, which are connected to lower ends of support legs 9, 10 via connecting members 14.
With respect to the rocker pin 15 fixed at right angles to 7,
A large rocker beam 16 is swingably mounted in the front and rear direction (longitudinal direction of the rails 6 and 7).
7, a middle rocker beam 18 is attached so as to be able to swing back and forth, and a small rocker beam 20 is forward and rearward below a front and rear position of each middle rocker beam 18 via a rocker pin 19. Swingably mounted,
Wheels 8 are attached to the front and rear positions of each small rocker beam 20, respectively. Therefore, the rocker device 2 is provided with a total of eight wheels 8 in the front and rear direction.

Further, the front and rear small rocker beams 20 are provided with a drive motor 21 with a brake, and a total of four wheels 8 provided on the front and rear small rocker beams 20 are provided. The drive wheels 8a are driven by a drive motor 21 via a reduction gear 23 and an intermediate gear 24 of a reduction gear 22. On the other hand, a total of four wheels 8 provided in the middle two small rocker beams 20 are driven wheels 8b.

[0007] The drive motor 21 is provided with a disc brake device 25.
5, the braking of the drive wheel 8a is performed. In addition, the driven wheel 8b rolls due to the traveling of the rocker device 2 due to the rotation of the driving wheel 8a, and supports only the load by sharing. In the drawing, reference numeral 26 denotes a traveling buffer provided, for example, so as to protrude from the front side of the frontmost small rocker beam 20 or to the rear side of the rearmost small rocker beam 20.
27 is a lashing rod 2 fixed to the large rocker beam 16
8 is connected to the lower part of the rails 6 and 7 so as to be able to undulate by means of a pin 30.
This is a floating prevention device configured to prevent the traveling crane 1 from lifting.

The traveling crane 1 has a drive motor 2
The vehicle is driven by rotating the driving wheel 8a by the driving of the first wheel.

When the traveling crane 1 is stopped, the rotation of the rotating shaft of the drive motor 21 is fixed by the disk brake device 25, so that the traveling crane 1 does not escape due to strong wind or the like. At this time, the rotation axis of the drive motor 21 is
2 through the reduction gear 23 and the intermediate gear 24, the rotational resistance when the driving wheel 8a is stopped is considerably large.
1 is small in size.

The traveling crane 1 normally has a driving wheel 8
As long as a does not slip on the rails 6 and 7, the problem that the traveling crane 1 escapes does not occur.

[0011]

However, in the conventional traveling crane 1 described above, when the traveling crane 1 is stopped, only the small disk brake device 25 is operated to fix the rotation of the driving wheel 8a. Therefore, there is a problem that the braking force may be insufficient, and when the braking force is insufficient against a strong wind or the like, the driving wheel 8a may start rotating and the traveling crane 1 may run away. I was In addition, in the total of four driving wheels 8a shown in FIG. 5, the slip resistance due to the frictional force on the rails 6 and 7 may be weak. In this case, the driving wheel 8a slides on the rails 6 and 7 due to strong wind or the like. However, there is a problem that the traveling crane 1 may escape.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the conventional device, and has as its object to provide a traveling crane escape prevention device capable of freely increasing the braking force of the traveling crane. And

[0013]

According to the present invention, a brake shaft is provided near an axle of a driven wheel provided in a traveling crane, and the axle and the brake shaft are connected by a transmission gear meshing with each other. The present invention relates to an escape prevention device for a traveling crane, wherein a rotating disk adapted to be braked by a disk brake is fixed to the braking shaft.

In the above means, the diameter of the transmission gear provided on the braking shaft may be smaller than the diameter of the transmission gear provided on the axle.

According to the present invention, a driven wheel braking device is disposed, and a disk brake is pressed against the rotating disk to restrain the rotation of the rotating disk. Braking can be performed with a braking force substantially equal to the braking force of the drive wheel having Therefore,
If one or more appropriate number of driven wheels are provided with driven wheel braking devices according to the magnitude of the braking force necessary to prevent the traveling crane from escaping, the number of driven wheel braking devices provided will limit the rotation of the driven wheels. The power and the sliding resistance against the rail can be increased, and thus the braking force can be arbitrarily increased so as to be the braking force necessary for preventing the traveling crane from escaping. Can be prevented.

If the diameter of the transmission gear attached to the braking shaft is made smaller than the diameter of the transmission gear attached to the axle, the rotation of the axle is increased and transmitted to the braking shaft. Depending on the ratio, even if the disc brake is small,
Alternatively, even if the number of disk brakes is reduced, the braking force of the driven wheels can be easily increased.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an example of the embodiment of the present invention. In FIG. 1 to FIG. 5, the same components as those shown in FIG. Will be described in detail.

As shown in FIGS. 1-3, the traveling crane 1
The driven wheel braking device 31 is provided corresponding to one or more of the driven wheels 8b provided in the rocker device 2 of FIG.

The driven wheel braking device 31 is provided near the axle 32 of the driven wheel 8 b provided in the traveling crane 1.
And a braking shaft 33 parallel to the above. In the case of FIGS. 1 to 3, the small rocker beam 20, which is the rocker beam to which the driven wheel 8 b is attached, is formed with an extension 34 projecting forward or backward, and the braking shaft 33 is attached to the extension 34. It is rotatably supported.

Further, a transmission gear 35 is fixed to the axle 32, and a transmission gear 36 meshing with the transmission gear 35 is fixed to the braking shaft 33, so that the rotation of the axle 32
3 so that it can be communicated.

Further, a rotating disk 37 is fixed to the braking shaft 33, and a bracket 38 is provided on the extension 34 of the small rocker beam 20.
The disc brake 40 is arranged so as to perform braking by pressing the rotating disc 37 through the disc 9.

In the above configuration, the diameter of the transmission gear 36 provided on the braking shaft 33 is smaller than the diameter of the transmission gear 35 provided on the axle 32. That is, the axle 32
Is transmitted to the braking shaft 33 by increasing the speed of the rotation.

The operation of the above embodiment will be described below.

As shown in FIG. 5, all the normal driven wheels 8b provided in the traveling crane 1 can freely rotate, and therefore no braking force can be expected from the driven wheels 8b.

However, as shown in FIGS. 1 to 3, the driven wheel braking device 31 is disposed on the driven wheel 8b,
When the disk brake 40 is pressed to restrict the rotation of the rotating disk 37, the rotation of the driven wheel 8b is reduced by a braking force substantially equal to the braking force of the driving wheel 8a which conventionally has a braking force. Can be braked.

Therefore, if one or more driven wheels 8b are provided with an appropriate number of driven wheels 8b in accordance with the magnitude of the braking force necessary to prevent the traveling crane 1 from running away, the driven wheels The braking force against the rotation of the driven wheel 8b and the slip resistance against the rails 6 and 7 can be increased by the number of installations. Therefore, the braking force can be arbitrarily increased so as to be the braking force necessary for preventing the traveling crane 1 from running away, and the traveling crane 1 can be reliably prevented from running away.

As described above, the diameter of the transmission gear 36 attached to the braking shaft 33 is made smaller than the diameter of the transmission gear 35 attached to the axle 32, and the rotation of the axle 32 is increased to increase the speed of the braking shaft. 33, depending on the gear ratio, even if the disc brake 40 is reduced in size or the number of disc brakes 40 is reduced, the driven wheel 8b
Can easily increase the braking force.

Although the rocker device 2 shown in FIG. 1 has a three-stage structure including the large rocker beam 16, the middle rocker beam 18, and the small rocker beam 20, the rocker device 2 has a two-stage structure. However, the present invention can be applied to a single-stage structure. In addition, in the examples of FIGS. 1 to 3, the case where the braking shaft 33 is installed in the lateral direction of the axle 32 is illustrated. However, when the installation space can be secured above the axle 32, the braking shaft 33 is It may be arranged on the upper side.

It should be noted that the present invention is not limited to the above embodiment, but can be applied to various traveling cranes that can travel along rails other than container cranes. It goes without saying that various changes can be made in the above.

[0031]

According to the present invention, when the driven wheel braking device is disposed and the disk brake is pressed against the rotating disk to restrain the rotation of the rotating disk, the rotation of the driven wheel is reduced. Braking can be performed with a braking force that is substantially equal to the braking force of a drive wheel that has conventionally had a braking force.
Therefore, if one or more appropriate number of driven wheels are provided with driven wheel braking devices according to the magnitude of the braking force necessary to prevent the traveling crane from escaping, the rotation of the driven wheels can be performed by the installed number of driven wheel braking devices. And the sliding resistance against the rail can be increased, so that the braking force can be arbitrarily increased so as to be the braking force necessary for preventing the traveling crane from escaping. This has the effect that it can be reliably prevented.

If the diameter of the transmission gear attached to the braking shaft is made smaller than the diameter of the transmission gear attached to the axle, the rotation of the axle is increased and transmitted to the braking shaft. Depending on the ratio, even if the disc brake is small,
Alternatively, even if the number of disk brakes is reduced, the braking force of the driven wheel can be easily increased.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a form of an escape prevention device for a traveling crane according to the present invention.

FIG. 2 is a detailed arrow view in the II-II direction of FIG. 1;

FIG. 3 is a detailed view taken in the direction of arrows III-III in FIG. 1;

FIG. 4 is a front view showing an example of a traveling crane.

FIG. 5 is a side view showing an example of a rocker device provided on a support leg of the traveling crane of FIG.

[Explanation of symbols]

 Reference Signs List 1 traveling crane 8b driven wheel 32 axle 33 braking shaft 35 transmission gear 36 transmission gear 37 rotating disk 40 disk brake

Claims (2)

[Claims] 1. A brake shaft is provided near an axle of a driven wheel provided in a traveling crane, and the axle and the brake shaft are connected by a transmission gear meshing with each other. An escape prevention device for a traveling crane, wherein a rotating disk adapted to be braked is fixed. 2. The escape prevention device for a traveling crane according to claim 1, wherein the diameter of the transmission gear provided on the brake shaft is smaller than the diameter of the transmission gear provided on the axle.