Track braking device for track traveling equipment

Abstract

The present invention includes a fluid pressure cylinder (41), a fluid pressure unit (42), an orbit clamping device opening / closing detector (60) for detecting the operating state of an orbit clamping device that clamps an orbit of a clamping orbit (4), a traveling brake opening / closing detector (70) for detecting the operating state of a traveling brake provided at a traveling drive motor of an orbit traveling device, a traveling speed detector (80) for detecting the traveling speed of the orbit traveling device, and further includes a simple controller (90). The simple controller (90) outputs a control signal (90a) to the fluid pressure unit (42) based on the operating state of the orbit clamping device detected by the orbit clamping device opening / closing detector (60), the operating state of the traveling brake detected by the traveling brake opening / closing detector (70), and the traveling speed detected by the traveling speed detector (80).

Description

Technical Field

[0001] The present invention relates to an orbital braking device for an orbital traveling device. Background Art

[0002] Figure 1 As an example of a container crane which is a general orbital traveling device, reference numeral 1 denotes a container crane, reference numeral 2 denotes a harbor equipped with the container crane 1, reference numeral 3 denotes a quay wall of the harbor 2, and reference numeral 4 denotes a track laid in a traveling path 3a of the quay wall 3 so as to extend in a direction orthogonal to the paper surface. Figure 1 in the direction orthogonal to the paper surface.

[0003] At a support leg 6 of a crane body 5 of the container crane 1, a traveling device 8 having traveling wheels 7 that can roll freely along the track 4 is installed.

[0004] In addition, at an equipment room 9 of the container crane 1, a control device 10 for overall control operation is provided.

[0005] When the container crane 1 is blown by strong wind during quay operation, there is a possibility that it may move without stopping against the operator's intention and get out of control.

[0006] Therefore, as a device for preventing the out-of-control of the orbital traveling device as described above, conventionally, for example, there is an orbital clamping device as disclosed in Patent Document 1. This orbital clamping device includes a pair of left and right clamping rods, and clamps both side surfaces of the track by brake shoes provided at the ends of the clamping rods.

[0007] In recent years, for an already installed orbital traveling device equipped with the aforementioned orbital clamping device, a retrofit is further carried out to additionally install an orbital brake that operates during power failure and emergency stop.

[0008] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2014-210623.

[0009] However, as described above, when additionally installing an orbital brake for an already installed orbital traveling device, it is necessary to connect the orbital brake provided at the lower end of the support leg 6 to the control device 10 provided at the equipment room 9, which requires a major modification of the control device 10 and re-routing of the wiring.

[0010] Therefore, there are problems of increased costs for the modification and wiring of the control device 10 and a prolonged construction period. Summary of the Invention

[0011] The present invention has been made in view of the above-mentioned conventional problems, and aims to provide an orbital braking device for an orbital traveling device that can reduce the costs of modifying and wiring the control device and can shorten the retrofit construction period.

[0012] The present invention relates to a track braking device for a track traveling device. The track braking device of the track traveling device includes a fluid pressure cylinder and a fluid pressure unit. The fluid pressure cylinder freely presses and separates a brake pad in a direction orthogonal to the track against the rolling surface of the traveling wheels of the track. The fluid pressure unit, during normal operation, causes the fluid pressure cylinder to operate and store pressure by introducing working fluid into the fluid pressure cylinder. On the other hand, during a power outage or when an emergency stop command is output, the stored working fluid is directed to the fluid pressure cylinder to press the brake pad against the rolling surface of the traveling wheels of the track. The track braking device of the track traveling device is characterized in that the track braking device of the track traveling device includes a track clamping device opening / closing detector, a traveling brake opening / closing detector, a traveling speed detector, and a simple controller. The track clamping device opening / closing detector detects the operating state of the track clamping device that clamps the track. The traveling brake opening / closing detector detects the operating state of the traveling brake provided at the traveling drive motor of the track traveling device. The traveling speed detector detects the traveling speed of the track traveling device. The simple controller outputs a control signal to the fluid pressure unit based on the operating state of the track clamping device detected by the track clamping device opening / closing detector, the operating state of the traveling brake detected by the traveling brake opening / closing detector, and the traveling speed detected by the traveling speed detector.

[0013] In the track braking device of the track traveling device, the simple controller includes a runaway detection AND circuit, an abnormal traveling detection AND circuit, and an OR circuit. The runaway detection AND circuit is turned on when the track clamping device is closed, the traveling brake is closed, and the traveling of the track traveling device is detected. The abnormal traveling detection AND circuit is turned on when the track clamping device is open, the traveling brake is open, and an abnormal traveling speed of the track traveling device is detected. The OR circuit is turned on when either the runaway detection AND circuit or the abnormal traveling detection AND circuit is turned on, or when a power outage occurs or an emergency stop command is output, and outputs a control signal to the fluid pressure unit to cause the fluid pressure cylinder to operate.

[0014] Advantages of the Invention

[0015] The track braking device of the track traveling device according to the present invention can achieve the following beneficial effects: It can reduce the cost of modifying the control device and wiring, and can shorten the modification construction period. Description of the Drawings

[0016] Figure 1 It is an overall side view showing an example of a container crane as a track traveling device.

[0017] Figure 2 This is the front view showing an embodiment of the track braking device of the track traveling device of the present invention.

[0018] Figure 3 This is a schematic structural diagram showing an embodiment of the track braking device of the track traveling device of the present invention.

[0019] Figure 4 This is the control circuit diagram showing an embodiment of the track braking device of the track traveling device of the present invention. Detailed Embodiment

[0020] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0021] Figures 2 to 4 This is an embodiment of the track braking device of the track traveling device of the present invention. Parts with the same reference numerals as those Figure 1 shown in the drawings represent the same components.

[0022] Figure 2 In the container crane 1 as the track traveling device shown, between the support legs 6 of the crane main body 5, a lower frame 6a extending along the track 4 in a manner connecting the support legs 6 is provided. On the bottom surface side of the lower frame 6a, a plurality of ( Figure 2 in the example of this case, two) traveling devices 8 are provided.

[0023] The aforementioned traveling device 8 includes an upper balance beam 9a, an intermediate balance beam 9b, a lower balance beam 9c, and traveling wheels 7.

[0024] The aforementioned upper balance beam 9a is swingably disposed, and its intermediate portion is supported on the bottom surface side of the aforementioned lower frame 6a by a locking pin 10a extending in a horizontal direction perpendicular to the traveling direction. The aforementioned intermediate balance beam 9b is swingably disposed, and its intermediate portion is supported at both ends in the traveling direction of the aforementioned upper balance beam 9a by a locking pin 10b extending in a horizontal direction perpendicular to the traveling direction. The aforementioned lower balance beam 9c is swingably disposed, and its intermediate portion is supported at both ends in the traveling direction of the aforementioned intermediate balance beam 9b by a locking pin 10c extending in a horizontal direction perpendicular to the traveling direction.

[0025] The aforementioned traveling wheels 7 are disposed at both ends in the traveling direction of the aforementioned lower balance beam 9c in a manner freely rolling along the track 4, and are rotationally driven by a traveling drive motor 8a. A traveling brake 8b is provided on the aforementioned traveling drive motor 8a.

[0026] In addition, Figure 2In the example shown, a balance device 9A composed of an upper balance beam 9a and an intermediate balance beam 9b, and a balance device 9B composed of the intermediate balance beam 9b and a lower balance beam 9c are formed in two upper and lower layers. Incidentally, the upper balance beam 9a of the upper balance device 9A is an upper-side balance beam, and the intermediate balance beam 9b is a lower-side balance beam. In addition, the intermediate balance beam 9b of the lower balance device 9B in the lower layer is relatively an upper-side balance beam, and the lower balance beam 9c is a lower-side balance beam. However, it is also possible to form only one layer of the balance device 9A corresponding to the scale of the container crane 1 which is the above-mentioned rail traveling device, and traveling wheels 7 are provided at the lower-side balance beam (in this case, the intermediate balance beam 9b). In addition, it is also possible to form the above-mentioned balance device in three or more upper and lower layers, and traveling wheels 7 that can roll freely along the track 4 are provided at both ends in the traveling direction of the lower-side balance beam of the lowermost balance device.

[0027] A track clamping device 20 is arranged on the bottom surface side of the lower frame 6a. This track clamping device 20 is the same as that disclosed in Patent Document 1, and includes a pair of left and right clamping rods 21, and the two side surfaces of the track 4 are clamped by brake shoes (not shown) provided at the ends of the clamping rods 21.

[0028] Moreover, in the case of this embodiment, a track brake 40 is additionally equipped on the above-mentioned container crane 1.

[0029] The above-mentioned track brake 40 installs a brake bracket 51 held by a tension rod 50 on the bottom surface side of the lower frame 6a, as Figure 3 shown, and includes a fluid pressure cylinder 41 and a fluid pressure unit 42.

[0030] The above-mentioned fluid pressure cylinder 41 includes a fluid pressure cylinder main body 41a, a fluid pressure piston 41b, and a fluid pressure piston rod 41c. The above-mentioned fluid pressure cylinder main body 41a is suspended from the lower part of the above-mentioned brake bracket 51 via a support pin 51a extending in the horizontal direction orthogonal to the track 4, and is installed downward in a form inserted into the inside of a housing 52 provided at the lower part of the above-mentioned brake bracket 51. The above-mentioned fluid pressure piston 41b is slidably inserted into the inside of the above-mentioned fluid pressure cylinder main body 41a, and divides the inside of the above-mentioned fluid pressure cylinder main body 41a into a cap-side chamber 41d and a rod-side chamber 41e. The above-mentioned fluid pressure piston rod 41c passes through the rod-side chamber 41e from the above-mentioned fluid pressure piston 41b and extends downward, and a brake pad 41f is connected to the lower end of the above-mentioned fluid pressure piston rod 41c so as to be freely pushed against and separated from the traveling wheel rolling surface 4a of the above-mentioned track 4 in a direction orthogonal to the track 4. Inside the fluid pressure cylinder main body 41a of the above-mentioned fluid pressure cylinder 41 (rod-side chamber 41e), a compression spring S2 as an elastic member S extending in the vertical direction is loaded in a manner of applying a force to pull the fluid pressure piston rod 41c.

[0031] During normal operation, the aforementioned fluid pressure unit 42 operates and accumulates pressure in the fluid pressure cylinder 41 by introducing working fluid into the fluid pressure cylinder 41 via the supply and discharge pipeline 42a. On the other hand, during a power outage or when an emergency stop command is output, the accumulated working fluid is directed to the fluid pressure cylinder 41, and the aforementioned brake pad 41f is pressed against the running surface 4a of the traveling wheels on the track 4.

[0032] Furthermore, the aforementioned track brake 40 includes a track clamping device opening / closing detector 60, a traveling brake opening / closing detector 70, a traveling speed detector 80, and a simple controller 90.

[0033] The aforementioned track clamping device opening / closing detector 60 detects the operating state of the track clamping device 20 that clamps the aforementioned track 4 and is provided on the track clamping device 20.

[0034] The aforementioned traveling brake opening / closing detector 70 detects the operating state of the aforementioned traveling brake 8b and is provided on the traveling brake 8b.

[0035] The aforementioned traveling speed detector 80 detects the traveling speed of the aforementioned container crane 1 and is provided on the aforementioned traveling drive motor 8a.

[0036] The aforementioned simple controller 90 is provided at a required position at the lower end of the support leg 6. As Figure 3 shown, based on the operating state of the track clamping device 20 detected by the aforementioned track clamping device opening / closing detector 60, the operating state of the traveling brake 8b detected by the aforementioned traveling brake opening / closing detector 70, and the traveling speed detected by the aforementioned traveling speed detector 80, a control signal 90a is output to the aforementioned fluid pressure unit 42.

[0037] If described in more detail, the aforementioned simple controller 90, as Figure 4 shown, includes a runaway detection AND circuit 91, an abnormal traveling detection AND circuit 92, and an OR circuit 93.

[0038] The aforementioned runaway detection AND circuit 91 is turned on when the aforementioned track clamping device 20 is closed, the aforementioned traveling brake 8b is closed, and the traveling of the aforementioned container crane 1 is detected.

[0039] The aforementioned abnormal traveling detection AND circuit 92 is turned on when the aforementioned track clamping device 20 is open, the aforementioned traveling brake 8b is open, and an abnormal traveling speed of the aforementioned container crane 1 is detected.

[0040] When either the runaway detection AND circuit 91 or the abnormal travel detection AND circuit 92 among the aforementioned OR circuit 93 is turned on, or when a power outage occurs or an emergency stop instruction is output, the OR circuit 93 is turned on and a control signal 90a for operating the fluid pressure cylinder 41 is output to the fluid pressure unit 42. In addition, the aforementioned emergency stop instruction is generated inside the simple controller 90 when it is necessary to intentionally cut off the power supply urgently.

[0041] Next, the operation of the above embodiment will be described.

[0042] When the container crane 1 is being operated, the operating state of the rail clamping device 20 for clamping the rail 4 is detected by the rail clamping device opening / closing detector 60, the operating state of the travel brake 8b is detected by the travel brake opening / closing detector 70, and the travel speed of the container crane 1 is detected by the travel speed detector 80.

[0043] When it is detected that the container crane 1 is moving even though the aforementioned rail clamping device 20 is closed and the aforementioned travel brake 8b is closed, the container crane 1 that should originally stop runs away, so the runaway detection AND circuit 91 of the simple controller 90 is turned on.

[0044] When the aforementioned runaway detection AND circuit 91 is turned on, the OR circuit 93 is also turned on, and a control signal 90a for operating the fluid pressure cylinder 41 is output to the fluid pressure unit 42. Working fluid is introduced from the fluid pressure unit 42 into the fluid pressure cylinder 41 via the supply / drain pipeline 42a, and the fluid pressure piston rod 41c of the fluid pressure cylinder 41 is driven in the protruding direction, and the rail brake 40 operates to prevent the container crane 1 from running away.

[0045] In addition, when the aforementioned rail clamping device 20 is opened, the aforementioned travel brake 8b is opened, and the travel speed of the aforementioned container crane 1 is detected to be abnormal, the abnormal travel detection AND circuit 92 of the simple controller 90 is turned on.

[0046] When the aforementioned abnormal travel detection AND circuit 92 is turned on, the aforementioned OR circuit 93 is also turned on, and a control signal 90a for operating the fluid pressure cylinder 41 is output to the fluid pressure unit 42. Working fluid is introduced from the fluid pressure unit 42 into the fluid pressure cylinder 41 via the supply / drain pipeline 42a, and the fluid pressure piston rod 41c of the fluid pressure cylinder 41 is driven in the protruding direction, and the rail brake 40 operates to prevent the container crane 1 from traveling at an abnormal speed.

[0047] Furthermore, in the event of a power outage or when an emergency stop command is output, the OR circuit 93 of the aforementioned simple controller 90 is turned on, and a control signal 90a for operating the fluid pressure cylinder 41 is output to the fluid pressure unit 42. Working fluid is introduced from the fluid pressure unit 42 into the fluid pressure cylinder 41 via the supply / discharge pipeline 42a, and the fluid pressure piston rod 41c of the fluid pressure cylinder 41 is driven in the protruding direction, causing the track brake 40 to operate and the container crane 1 to make an emergency stop.

[0048] In addition, when the OR circuit 93 of the aforementioned simple controller 90 is turned off and the control signal 90a for operating the fluid pressure cylinder 41 is not output to the fluid pressure unit 42, the working fluid in the cap side chamber 41d of the fluid pressure cylinder 41 is discharged to the fluid pressure unit 42 via the supply / discharge pipeline 42a. Due to the force of the compression spring S2 of the fluid pressure cylinder 41, the fluid pressure piston rod 41c is driven in the retracting direction, releasing the operation of the track brake 40, and the container crane 1 is in a state where it can travel.

[0049] Here, since the aforementioned simple controller 90 can be installed at the lower end of the support leg 6, the wiring of the fluid pressure unit 42 connecting the track brake 40 to the simple controller 90 can be relatively short. In addition, there is no need to use long wiring for connecting the track clamping device opening / closing detector 60, the traveling brake opening / closing detector 70, and the traveling speed detector 80 to the simple controller 90.

[0050] Thus, different from the prior art, when retrofitting the already installed container crane 1 with the track brake 40, it is not necessary to connect the track brake 40 installed at the lower end of the support leg 6 to the control device 10 installed in the equipment room 9, eliminating the need for major modification of the control device 10 and re-routing of the wiring.

[0051] Therefore, almost no cost is incurred for modifying the control device 10 and wiring, and there is no concern about prolonging the construction period.

[0052] In this way, the cost of modifying the control device 10 and wiring can be reduced, and the shortening of the retrofit construction period can be achieved.

[0053] Further, in the case of this embodiment, the aforementioned simple controller 90 includes a runaway detection AND circuit 91, an abnormal travel detection AND circuit 92, and an OR circuit 93. The aforementioned runaway detection AND circuit 91 is turned on when the track clamping device 20 is closed, the travel brake 8b is closed, and the travel of the aforementioned rail-mounted device (container crane 1) is detected. The aforementioned abnormal travel detection AND circuit 92 is turned on when the track clamping device 20 is open, the travel brake 8b is open, and the travel speed of the aforementioned rail-mounted device (container crane 1) is detected to be abnormal. The aforementioned OR circuit 93 is turned on when either the runaway detection AND circuit 91 or the abnormal travel detection AND circuit 92 is turned on, or when a power failure occurs or an emergency stop command is output, and outputs a control signal 90a for operating the aforementioned fluid pressure cylinder 41 to the aforementioned fluid pressure unit 42. If configured in this way, it is possible to prevent the runaway of the rail-mounted device (container crane 1) that should originally stop. In addition, it is possible to avoid the rail-mounted device (container crane 1) from traveling at an abnormal speed. Furthermore, it is possible to accurately perform an emergency stop when a power failure occurs or an emergency stop command is output for the rail-mounted device (container crane 1).

[0054] In addition, the track braking device of the rail-mounted device of the present invention is not limited to the above-described embodiment, and various changes can obviously be made without departing from the gist of the present invention.

[0055] Explanation of reference numerals

[0056] 1 Container crane (rail-mounted device)

[0057] 2 Harbor

[0058] 3 Quay wall

[0059] 3a Travel path

[0060] 4 Track

[0061] 4a Travel wheel rolling surface

[0062] 5 Crane body

[0063] 6 Support leg

[0064] 6a Lower frame

[0065] 7 Travel wheel

[0066] 8 Travel device

[0067] 8a Travel drive motor

[0068] 8b Travel brake

[0069] 9 Equipment room

[0070] 9A Balancing device

[0071] 9B Balancing device

[0072] 9a Upper balance beam

[0073] 9b Middle balance beam

[0074] 9c Lower balance beam

[0075] 10 Control device

[0076] 10a Locking pin

[0077] 10b Locking pin

[0078] 10c Locking pin

[0079] 20 Rail clamping device

[0080] 21 Clamping rod

[0081] 40 Rail brake

[0082] 41 Fluid pressure cylinder

[0083] 41a Fluid pressure cylinder body

[0084] 41b Fluid pressure piston

[0085] 41c Fluid pressure piston rod

[0086] 41d Cap side chamber

[0087] 41e Rod side chamber

[0088] 41f Brake pad

[0089] 42 Fluid pressure unit

[0090] 42a Feed and drain pipeline

[0091] 50 Tension rod

[0092] 51 Brake bracket

[0093] 51a Support pin

[0094] 52 Housing

[0095] 60 Rail clamping device opening / closing detector

[0096] 70 Travel brake opening / closing detector

[0097] 80 Travel speed detector

[0098] 90 Simple controller

[0099] 90a control signal

[0100] 91 runaway detection AND circuit

[0101] 92 abnormal travel detection AND circuit

[0102] 93 OR circuit

[0103] S elastic member

[0104] S2 compression spring.

Claims

1. A track braking device for a track - traveling device. The track braking device of the track - traveling device includes a fluid - pressure cylinder and a fluid - pressure unit. The fluid - pressure cylinder freely presses and separates a brake pad in a direction orthogonal to the track against the rolling surface of the traveling wheels of the track. The fluid - pressure unit, during normal operation, makes the fluid - pressure cylinder work and accumulates pressure by introducing working fluid into the fluid - pressure cylinder. On the other hand, during a power outage or when an emergency stop command is output, the accumulated working fluid is directed to the fluid - pressure cylinder to press the brake pad against the rolling surface of the traveling wheels of the track. It is characterized in that, the track braking device of the track - traveling device includes a track - clamping device opening - closing detector, a traveling brake opening - closing detector, a traveling speed detector, and a simple controller. The track - clamping device opening - closing detector detects the working state of the track - clamping device that clamps the track. The traveling brake opening - closing detector detects the working state of the traveling brake provided at the traveling drive motor of the track - traveling device. The traveling speed detector detects the traveling speed of the track - traveling device. The simple controller outputs a control signal to the fluid - pressure unit based on the working state of the track - clamping device detected by the track - clamping device opening - closing detector, the working state of the traveling brake detected by the traveling brake opening - closing detector, and the traveling speed detected by the traveling speed detector. The simple controller includes a runaway detection AND circuit, an abnormal - traveling detection AND circuit, and an OR circuit. The runaway detection AND circuit is turned on when the track - clamping device is closed, the traveling brake is closed, and the traveling of the track - traveling device is detected. The abnormal - traveling detection AND circuit is turned on when the track - clamping device is open, the traveling brake is open, and an abnormal traveling speed of the track - traveling device is detected. The OR circuit is turned on when either the runaway detection AND circuit or the abnormal - traveling detection AND circuit is turned on, or when a power outage occurs or an emergency stop command is output, and outputs a control signal to make the fluid - pressure cylinder of the fluid - pressure unit work.

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