JP6435136B2 - Emergency brake system for track-type machine - Google Patents

Description

  The present invention relates to an emergency brake device for a track traveling machine.

  FIG. 9 shows an example of a container crane as a general track-traveling machine, where 1 is a container crane, 2 is a port where the container crane 1 is deployed, 3 is a quay in the port 2, and 4 is a quay 3 9 is a rail laid so as to extend in a direction perpendicular to the paper surface of FIG. 9, and the traveling leg 7 has a traveling wheel 7 that can roll along the rail 4 on the support leg 6 of the crane body 5 of the container crane 1. 8 is attached.

  If the container crane 1 is hit by a strong wind during a cargo handling operation, it will not stop running against the will of the driver and will run away, possibly leading to a collision or collapse to an adjacent machine or nearby structure. .

  For this reason, as a device for preventing the above-described runaway, a brake device as disclosed in, for example, Patent Document 1 has been developed, and the brake device is orthogonal to the traveling wheel rolling surface of the rail. It has a brake actuator that can press and release the brake pad in the direction to move.

  The brake actuator is inserted into a cylinder body that is attached to the crane body so as to extend in a direction orthogonal to the rolling wheel rolling surface of the rail, and is slidably inserted into the cylinder chamber of the cylinder body in the axial direction thereof. A piston that extends from the piston to the outside of the cylinder body and to which the brake pad is attached, and the inside of the cylinder body that urges the tip rod part of the piston in a direction that protrudes from the cylinder body. And a working fluid pressure unit for releasing braking.

  When braking is performed by the brake actuator, the pressure of the working fluid from the working fluid pressure unit is not applied to the inside of the cylinder body of the cylinder body, so that the piston is biased by the biasing force of the disc spring. The tip rod portion of the rail is moved in a direction to protrude from the inside of the cylinder body, and the brake pad is pressed against the running wheel rolling surface of the rail.

  On the other hand, when releasing the braking by the brake actuator, the pressure of the working fluid is applied to the cylinder chamber of the cylinder body, so that the tip rod portion of the piston is moved against the urging force of the disc spring. The brake pad is moved away from the running wheel rolling surface of the rail by moving in the direction of contraction.

JP 2010-247944 A

  However, the running wheel rolling surface of the rail is not completely horizontal and undulating, and the brake actuator as described above using a disc spring for brake operation cannot take a sufficiently long stroke. For this reason, the brake pad cannot be strongly pressed against the running wheel rolling surface of the rail at the concave portion due to the undulation, and there is a problem that the braking force is lowered and becomes unstable.

  Also, if the pressing force of the disc spring is made too strong to compensate for the decrease in braking force, an excessive load is always applied to the rail during braking, increasing the load on the structure and the device itself, and shortening the service life. There was a risk of it.

  The present invention has been made in view of the above-mentioned conventional problems, can generate a sufficient braking force even for a wavy rail, can prevent the track traveling machine from running away due to strong winds, Another object of the present invention is to provide an emergency brake device for a track traveling machine that can suppress the load on the structure and the device itself to the minimum necessary.

The present invention includes a traveling device in which traveling wheels that can roll along a rail are provided, and a brake that presses and separates a brake pad in a direction perpendicular to the rail with respect to a traveling wheel rolling surface of the rail. An emergency brake device for an orbital machine equipped with an actuator,
A piston rod extending telescopically from the cylinder body of the brake actuator to the rail side;
The brake pad is fixed to the surface facing the rail, and the gradient in the direction away from the rail from the center to both ends in the longitudinal direction of the rail on the surface facing the piston rod opposite to the surface facing the rail A base block on which an inclined surface is formed;
The base block is connected so as to be suspended from the piston rod, and at least one of both ends pivotally attached to the piston rod and the base block is slidable in a direction perpendicular to the rail with respect to the running wheel rolling surface of the rail. A connecting member attached to,
A pressure member attached to the front end surface of the piston rod so as to press the central portion of the base block connected to the piston rod by the connecting member by the extension operation of the piston rod and press the brake pad against the running wheel rolling surface of the rail. And an emergency brake device for a track traveling machine.

  In the emergency brake device of the track traveling machine, it is preferable that the pressing member is a roller that can roll along the inclined surface.

  In the emergency brake device of the track traveling machine, the pressing member is preferably a wedge-shaped block that is slidable along the inclined surface.

  According to the emergency braking device for a track traveling machine of the present invention, a sufficient braking force can be generated even on a wavy rail, and the track traveling machine can be prevented from running away due to strong winds. It is possible to achieve an excellent effect that the load on the object and the device itself can be suppressed to the minimum necessary.

1 is a front view showing a first embodiment of an emergency brake device for a track traveling machine according to the present invention. It is a principal part enlarged front view which shows the 1st Example of the emergency brake device of the track traveling machine of this invention, Comprising: It is a figure which shows a brake release state. It is a principal part enlarged front view which shows the 1st Example of the emergency brake device of the track traveling machine of this invention, Comprising: It is a figure which shows the braking state in normal time. It is a principal part enlarged front view which shows the 1st Example of the emergency brake apparatus of the track traveling machine of this invention, Comprising: It is a figure which shows the state which the pressing member moved in the case of emergency. It is a principal part enlarged front view which shows the 1st Example of the emergency brake apparatus of the track traveling machine of this invention, Comprising: It is a figure which shows the state which the pressing member moved to the maximum at the time of emergency. It is a principal part enlarged front view which shows the 2nd Example of the emergency brake device of the track traveling machine of this invention, Comprising: It is a figure which shows a brake release state. It is a principal part enlarged front view which shows the 2nd Example of the emergency brake device of the track traveling machine of this invention, Comprising: It is a figure which shows the braking state in normal time. It is a principal part enlarged front view which shows the 2nd Example of the emergency brake device of the track traveling machine of this invention, Comprising: It is a figure which shows the state which the pressing member moved in the case of emergency. It is a whole side view showing an example of a container crane (orbital traveling machine).

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 to 5 show a first embodiment of an emergency braking device for a track traveling machine according to the present invention. In the figure, the parts denoted by the same reference numerals as those in FIG. A brake bracket 10 held by a tension rod 9 is suspended on the lower surface side of the lower frame 6a extending along the rail 4 so as to connect the support legs 6 of the crane main body 5 of the container crane 1 as a machine. A cylindrical outer case 11 is attached to the lower portion of the outer casing 11, and the brake pad 12 is pressed and separated in the outer case 11 in a direction perpendicular to the traveling wheel rolling surface 4a of the rail 4 (vertical direction in the illustrated example). A flexible brake actuator 13 is provided.

  The brake actuator 13 has a cylinder body 13a disposed in the outer case 11 so as to extend in a direction perpendicular to the traveling wheel rolling surface 4a of the rail 4, and is similar to that described in Patent Document 1. A piston (not shown) is fitted into the cylinder chamber (not shown) of the cylinder body 13a so as to be slidable in the axial direction, and from the piston downward (to the rail 4 side) outside the cylinder body 13a. A plurality of disc springs (not shown) are press-fitted into the cylinder body 13a so as to project the piston rod 13b so as to extend freely, and to urge the piston rod 13b in a direction to protrude from the cylinder body 13a. Further, the cylinder body 13a is connected to a working fluid pressure unit (not shown) for releasing braking.

  In the case of the first embodiment, the upper surface of the base block 14 on which the brake pad 12 is fixed to the lower surface (the surface facing the rail 4) (the surface facing the piston rod 13b opposite to the surface facing the rail 4). ), An inclined surface 14a is formed which has an upward gradient from the central portion toward both ends in the longitudinal direction of the rail 4 (gradient in a direction away from the rail 4).

  The base block 14 is connected to be suspended from the piston rod 13b by a connecting member 15 made of a rod or a wire. An upper end pivotally attached to the piston rod 13b of the connecting member 15 extends in a vertical direction recessed in the piston rod 13b (a direction perpendicular to the rail 4 with respect to the running wheel rolling surface 4a of the rail 4). It is slidably attached along the long hole 13c. It should be noted that only the lower end pivotally attached to the base block 14 of the connecting member 15 is slidably attached along a long hole (not shown) that is recessed in the base block 14 and extends in the vertical direction. good. Further, the piston rod 13b of the connecting member 15 and the upper and lower ends pivotally attached to the base block 14 are provided with a long hole 13c and a long hole (FIG. It is also possible to attach it slidably along (not shown).

  A pressing member 16 is attached to the lower surface (front end surface) of the piston rod 13b, and a central portion of the base block 14 suspended from the piston rod 13b by the connecting member 15 is moved by the extending operation of the piston rod 13b. 16, the brake pad 12 is pressed against the running wheel rolling surface 4 a of the rail 4.

  In the case of the first embodiment, the pressing member 16 is a roller 16a, and rolls along the inclined surface 14a, which is a curved surface, around the rotating shaft 18 of the bracket 17 fixed to the lower surface of the piston rod 13b. It is supposed to be.

  Next, the operation of the first embodiment will be described.

  When the piston rod 13b of the brake actuator 13 is moved in the direction of contracting into the cylinder body 13a by the pressure of the working fluid from a working fluid pressure unit (not shown), the brake pad 12 is moved to the rail. Accordingly, the braking is released and the container crane 1 can be caused to travel. At this time, the roller 16a which is the pressing member 16 is separated from the upper surface of the base block 14, the base block 14 is suspended from the piston rod 13b by the connecting member 15, and the upper end of the connecting member 15 is locked to the lower end of the long hole 13c. It will be in the state.

  When the pressure of the working fluid from the working fluid pressure unit is released, the piston rod 13b is moved from the cylinder body 13a by the biasing force of a disc spring (not shown) press-fitted into the cylinder body 13a as shown in FIG. The brake pad 12 is pressed against the traveling wheel rolling surface 4a of the rail 4 so as to be braked. At this time, the roller 16a, which is the pressing member 16, is pressed against the center of the upper surface of the base block 14, the base block 14 is pressed toward the rail 4, and the upper end of the connecting member 15 contacts the upper end of the long hole 13c. It becomes a state.

  From the state shown in FIG. 3, when the container crane 1 is beaten by a strong wind during the cargo handling operation and the roller 16a, which is the pressing member 16, moves from the center part to the end part side as shown in FIG. Since the inclined surface 14a is formed on the upper surface of the block 14, the pressing force of the brake pad 12 against the traveling wheel rolling surface 4a of the rail 4 increases due to the wedge effect. At this time, the connecting member 15 is inclined from the vertical state, and the upper end thereof is located in the middle in the vertical direction of the long hole 13c.

  When the roller 16a as the pressing member 16 moves further from the center portion of the base block 14 to the end side as shown in FIG. 5 from the state shown in FIG. 4, the running wheel rolling of the rail 4 of the brake pad 12 is caused by the wedge effect. The pressing force against the surface 4a further increases. At this time, the inclination angle of the connecting member 15 is increased, and the upper end of the connecting member 15 is located at the lower end of the long hole 13c.

  If the structure of increasing the pressing force of the brake pad 12 against the traveling wheel rolling surface 4a of the rail 4 by the wedge effect by the roller 16a as the pressing member 16 as in the first embodiment, the traveling wheel rolling of the rail 4 is adopted. Even when the moving surface 4a is not completely horizontal, unlike the conventional brake actuator that simply uses a disc spring to actuate the brake, when the container crane 1 starts to move due to a strong wind during cargo handling work The brake pad 12 can be strongly pressed against the traveling wheel rolling surface 4a of the rail 4 even in a concave portion due to the undulation, the braking force is stable without decreasing, and the container crane 1 may run away. can avoid.

  Further, in the first embodiment, even if the pressing force by the disc spring is not increased in order to compensate for the decrease in the braking force, the pressing member is used only when the container crane 1 is moved by a strong wind during the cargo handling operation. Since the wedge effect by the roller 16a as the roller 16 can increase the pressing force of the brake pad 12 against the running wheel rolling surface 4a of the rail 4, a load more than necessary always acts on the rail 4 during braking. Thus, the load on the structure and the apparatus itself can be kept low, and the life can be avoided from being shortened.

  In this way, a sufficient braking force can be generated for the undulating rail 4, and the escape of the container crane 1 as a track traveling machine due to strong winds can be prevented, and the load on the structure and the device itself can be prevented. Can be minimized.

  The brake actuator 13 is arranged vertically so that the side on which the piston rod 13b protrudes faces downward, but the orbital traveling type in which the traveling wheel rolling surface 4a of the rail 4 is disposed sideways. Needless to say, it can also be applied to machines. However, when the traveling wheel rolling surface 4a of the rail 4 is disposed sideways, the connecting member 15 cannot be a wire that bends, but may be a rod that can support the base block 14.

  6 to 8 show a second embodiment of the emergency braking device for a track traveling machine according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 5 denote the same parts. Although the basic configuration is the same as that shown in FIGS. 1 to 5, the second embodiment is characterized in that the pressing member 16 is replaced with a roller 16 a as shown in FIGS. 6 to 8. The wedge-shaped block 16b is slidable along the inclined surface 14a.

  The wedge-shaped block 16b is formed with tapered surfaces 16c parallel to the inclined surface 14a at both ends in the longitudinal direction of the rail 4 on the lower surface thereof.

  Next, the operation of the second embodiment will be described.

  When the piston rod 13b of the brake actuator 13 is moved toward the inside of the cylinder body 13a by the pressure of the working fluid from a working fluid pressure unit (not shown), the brake pad 12 is moved to the rail. Accordingly, the braking is released and the container crane 1 can be caused to travel. At this time, the wedge-shaped block 16b which is the pressing member 16 is separated from the upper surface of the base block 14, the base block 14 is suspended from the piston rod 13b by the connecting member 15, and the upper end of the connecting member 15 is engaged with the lower end of the long hole 13c. It will be stopped.

  When the pressure of the working fluid from the working fluid pressure unit is released, the piston rod 13b is moved from the cylinder body 13a by the biasing force of a disc spring (not shown) press-fitted into the cylinder body 13a as shown in FIG. The brake pad 12 is pressed against the traveling wheel rolling surface 4a of the rail 4 so as to be braked. At this time, the wedge-shaped block 16b, which is the pressing member 16, is pressed against the central portion of the upper surface of the base block 14 so that the tapered surface 16c is in close contact with the inclined surface 14a, and the base block 14 is pushed toward the rail 4 side. The upper end of the connecting member 15 is in contact with the upper end of the long hole 13c.

  From the state shown in FIG. 7, when the container crane 1 is beaten by a strong wind during the cargo handling operation, and as shown in FIG. 8, the wedge-shaped block 16 b that is the pressing member 16 moves from the center part to the end part side of the base block 14, Since the inclined surface 14a is formed on the upper surface of the base block 14, the pressing force of the brake pad 12 against the traveling wheel rolling surface 4a of the rail 4 increases due to the wedge effect. At this time, the connecting member 15 is inclined from the vertical state, and the upper end thereof is located in the middle in the vertical direction of the long hole 13c.

  When the wedge-shaped block 16b which is the pressing member 16 moves further from the center portion of the base block 14 toward the end side from the state shown in FIG. 8, although not shown, the traveling of the rail 4 of the brake pad 12 by the wedge effect is performed. The pressing force against the wheel rolling surface 4a further increases. At this time, the inclination angle of the connecting member 15 is increased, and the upper end of the connecting member 15 is located at the lower end of the long hole 13c.

  If a structure that increases the pressing force of the brake pad 12 against the rolling wheel rolling surface 4a of the rail 4 by the wedge effect by the wedge-shaped block 16b as the pressing member 16 as in the second embodiment, the traveling vehicle of the rail 4 is used. Even if the rolling contact surface 4a is not completely horizontal and wavy, unlike the conventional brake actuator that simply uses a disc spring to actuate the brake, the container crane 1 has been driven by strong winds during the handling operation. In this case, the brake pad 12 can be strongly pressed against the traveling wheel rolling surface 4a of the rail 4 even at a concave portion due to the undulation, the braking force is stable without decreasing, and the container crane 1 runs away. Can be avoided.

  Further, in the second embodiment, even if the pressing force by the disc spring is not increased in order to compensate for the decrease in the braking force, the pressing member is used only when the container crane 1 is moved by a strong wind during the cargo handling operation. The wedge effect of the wedge-shaped block 16b as 16 makes it possible to increase the pressing force of the brake pad 12 against the traveling wheel rolling surface 4a of the rail 4, so that an excessive load is always applied to the rail 4 during braking. Thus, the load on the structure and the apparatus itself can be kept low, and the life can be avoided from being shortened.

  Thus, in the second embodiment as well, as in the first embodiment, a sufficient braking force can be generated for the undulating rail 4 and the escape of the container crane 1 as a track traveling machine due to strong winds can be prevented. Further, the load on the structure and the apparatus itself can be suppressed to the minimum necessary. Also, the use of the wedge-shaped block 16b is preferable because the height of the emergency brake device can be shortened compared to the case of using the roller 16a, and the size can be further reduced.

  The emergency brake device of the track traveling machine according to the present invention is not limited to the above-described embodiment, and is also applicable to an emergency brake device employing a general fluid pressure cylinder without using a disc spring. It goes without saying that various changes can be made without departing from the scope of the present invention, such as possible.

1 Container crane (orbital traveling machine)
4 rail 4a traveling wheel rolling surface 7 traveling wheel 8 traveling device 12 brake pad 13 brake actuator 13a cylinder body 13b piston rod 13c long hole 14 base block 14a inclined surface 15 connecting member 16 pressing member 16a roller 16b wedge-shaped block

Claims (3)

A traveling device having traveling wheels that can roll along the rails and a brake actuator that presses and separates the brake pads in a direction perpendicular to the rails with respect to the traveling wheel rolling surface of the rails. An emergency brake device for a track traveling machine,
A piston rod extending telescopically from the cylinder body of the brake actuator to the rail side;
The brake pad is fixed to the surface facing the rail, and the gradient in the direction away from the rail from the center to both ends in the longitudinal direction of the rail on the surface facing the piston rod opposite to the surface facing the rail A base block on which an inclined surface is formed;
The base block is connected so as to be suspended from the piston rod, and at least one of both ends pivotally attached to the piston rod and the base block is slidable in a direction perpendicular to the rail with respect to the running wheel rolling surface of the rail. A connecting member attached to,
A pressure member attached to the front end surface of the piston rod so as to press the central portion of the base block connected to the piston rod by the connecting member by the extension operation of the piston rod and press the brake pad against the running wheel rolling surface of the rail. And an emergency brake device for a track traveling machine.   The emergency braking device for a track traveling machine according to claim 1, wherein the pressing member is a roller that can roll along the inclined surface.   The emergency brake device for a track traveling machine according to claim 1, wherein the pressing member is a wedge-shaped block that is slidable along the inclined surface.

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