CN107673209B - Safety interlocking device for upper and lower crown blocks - Google Patents
Safety interlocking device for upper and lower crown blocks Download PDFInfo
- Publication number
- CN107673209B CN107673209B CN201710975651.6A CN201710975651A CN107673209B CN 107673209 B CN107673209 B CN 107673209B CN 201710975651 A CN201710975651 A CN 201710975651A CN 107673209 B CN107673209 B CN 107673209B
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- CN
- China
- Prior art keywords
- ladder
- fixed
- crown block
- extension
- proximity switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 241000282326 Felis catus Species 0.000 claims abstract description 38
- 230000001960 triggered effect Effects 0.000 claims abstract description 14
- 230000009193 crawling Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000009194 climbing Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention discloses a safety interlocking device of an upper crown block and a lower crown block, which comprises: the device comprises a fixed ladder vertically fixed on a girder of the crown block, wherein an extending ladder and a limiting guide mechanism capable of limiting and guiding the extending ladder are arranged on the fixed ladder, a supporting mechanism capable of supporting the extending ladder to enable the extending ladder to be folded on the fixed ladder is arranged at the lower part of the fixed ladder, a proximity switch is further arranged at one side of the top end of the fixed ladder, when the extending ladder is supported by the supporting mechanism, the upper part of the extending ladder can trigger the proximity switch, and when the proximity switch is triggered, the crown block can work normally; the adjustment support mechanism makes the support mechanism not to support the extension cat ladder and just can vertically down the extension cat ladder along fixed cat ladder, and the proximity switch just can not be triggered after the extension cat ladder descends, and overhead traveling crane control system can make the overhead traveling crane unable action this moment, until proximity switch is triggered once more. The safety interlocking device for the upper crown block and the lower crown block can greatly improve the maintenance safety of the crown block.
Description
Technical Field
The invention relates to the field of crown block equipment, in particular to an upper crown block and lower crown block safety interlocking device for crown blocks.
Background
The overhead traveling crane often needs to be overhauld, so be provided with a vertical ladder on the overhead traveling crane girder, maintainer can climb to the overhead traveling crane girder through the vertical ladder and overhaul, but the maintainer is shielded by the overhead traveling crane girder when climbing the vertical ladder easily, the overhead traveling crane driver is easy to mistake and is started the overhead traveling crane for maintainer has left the vertical ladder, maintainer on the vertical ladder will remove along with the overhead traveling crane like this, because the overhead traveling crane only has 30 to 50 centimeters from the steel construction of factory building, so maintainer is injured by the extrusion easily along with the overhead traveling crane after removing together.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the upper and lower crown block safety interlocking device can improve crown block maintenance safety.
In order to solve the problems, the invention adopts the following technical scheme: upper and lower overhead travelling crane safety interlock includes: the fixed cat ladder vertically fixed on the crown block girder is characterized in that: the fixed ladder is provided with an extension ladder which can be retracted on the fixed ladder and a limiting guide mechanism which can limit and guide the extension ladder when the extension ladder is vertically lowered, the lower part of the fixed ladder is provided with a supporting mechanism which can support the extension ladder to enable the extension ladder to be retracted on the fixed ladder, one side of the top end of the fixed ladder is also provided with a proximity switch which is communicated with a crown block control system, when the extension ladder is supported by the supporting mechanism, the upper part of the extension ladder can trigger the proximity switch, and when the proximity switch is triggered, the crown block can normally work; the adjustment holds up the mechanism and makes the mechanism just can will extend the cat ladder and vertically put down along fixed cat ladder after holding up the cat ladder to extend the cat ladder for on the maintenance personal can climb the crown block girder through extending cat ladder and fixed cat ladder, extend the cat ladder and just can not be triggered by the proximity switch after lowering down, and overhead travelling crane control system can make the overhead travelling crane unable action until proximity switch is triggered once more this moment.
Further, the safety interlocking device for the upper and lower crown blocks, wherein: the structure of the supporting mechanism is as follows: be provided with a rotatable couple on the montant of fixed cat ladder lower part one side, the couple is rotatory to can hook behind the montant below of extending the cat ladder corresponding side on the cat ladder and hold the montant on the extension cat ladder to make the extension cat ladder can be packed up on fixed cat ladder.
Further, the safety interlocking device for the upper and lower crown blocks, wherein: the limiting guide mechanism is two vertical circular tubes welded on vertical rods on two sides of the fixed crawling ladder, and the two vertical rods on the extending crawling ladder penetrate through the two vertical circular tubes from bottom to top respectively.
Further, the safety interlocking device for the upper and lower crown blocks, wherein: the two vertical rods of the fixed cat ladder are respectively provided with a lower bracket, the two lower brackets are positioned below the supporting mechanism, and the extending cat ladder is put down until the vertical rods on two sides of the extending cat ladder are respectively inserted into the two lower brackets from top to bottom, and then the extending cat ladder stops to be put down.
Further, the safety interlocking device for the upper and lower crown blocks, wherein: the proximity switch is a photoelectric switch.
The invention has the advantages that: the upper and lower crown block safety interlocking device disclosed by the invention can climb onto the crown block girder through the extension cat ladder and the fixed cat ladder only after the maintenance personnel adjusts the supporting mechanism to put down the extension cat ladder, so that the maintenance personnel cannot climb onto the crown block girder at will; in addition, the proximity switch can not be triggered after the extension ladder is put down, at the moment, the crown block can not act until the proximity switch is triggered again, and then the crown block can act, so that the maintenance safety can be greatly improved.
Drawings
FIG. 1 is a schematic view of an upper and lower crown block safety interlock according to the present invention.
FIG. 2 is a schematic view of another working state of the safety interlock device for an upper and lower crown block according to the present invention.
Fig. 3 is an enlarged schematic view of the structure at a in fig. 1.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1 and 2, the safety interlock device for the upper and lower crown blocks comprises: a fixed ladder 1 vertically fixed on a girder 6 of the crown block, an extension ladder 2 which can be retracted on the fixed ladder 1 and a limit guide mechanism 3 which can limit and guide the extension ladder 2 when the extension ladder 2 is vertically lowered are arranged on the fixed ladder 1, a supporting mechanism 4 which can support the extension ladder 2 to enable the extension ladder 2 to be retracted on the fixed ladder 1 is arranged at the lower part of the fixed ladder 1, a proximity switch 5 which is communicated with a crown block control system is also arranged at one side of the top end of the fixed ladder 1, and in the embodiment, the proximity switch 5 is a photoelectric switch; when the extension cat ladder 2 is lifted by the lifting mechanism 4, the upper part of the extension cat ladder 2 can trigger the proximity switch 5, and when the proximity switch 5 is triggered, the crown block can work normally; the supporting mechanism 4 is adjusted to enable the supporting mechanism 4 not to support the extension ladder 2, then the extension ladder 2 can be vertically lowered along the fixed ladder 1, so that an maintainer can climb onto the crown block girder 6 to overhaul through the extension ladder 2 and the fixed ladder 1, in the embodiment, two lower brackets 7 are respectively arranged on two vertical rods of the fixed ladder 1, the two lower brackets 7 are located below the supporting mechanism 4, after the vertical rods of the two sides of the extension ladder 2 are respectively inserted into the two lower brackets 7 from top to bottom, the extension ladder 2 stops to be lowered, the upper part of the extension ladder 2 can be limited by the limiting guide mechanism 3, and the lower part can be limited by the two lower brackets 7, so that the stability of the extension ladder 2 can be greatly improved, and the maintainer cannot shake violently when climbing the extension ladder 2; in practical application, the extension cat ladder 2 can be directly lowered onto the supporting table, but the extension cat ladder 2 is unstable and easy to shake during climbing; the proximity switch 5 can not be triggered after the extension ladder 2 is lowered, and the crown block control system can enable the crown block to be disabled until the proximity switch 5 is triggered again.
In the present embodiment, as shown in fig. 3, the structure of the holding mechanism 4 is: a rotatable hook 41 is arranged on the vertical rod at one side of the lower part of the fixed cat ladder 1, and the hook 41 can hook the vertical rod on the extended cat ladder 2 after rotating to the lower part of the vertical rod at the corresponding side of the extended cat ladder 2, so that the extended cat ladder 2 can be retracted on the fixed cat ladder 1. The folded extension ladder 2 is lifted upwards, so that the extension ladder 2 is separated from the hook 41, and then the hook 41 is rotated to be away from the lower part of the vertical rod of the extension ladder 2, and at the moment, the extension ladder 2 can be vertically placed along the fixed ladder 1.
The limiting guide mechanism 3 is two vertical round pipes 31 welded on vertical rods at two sides of the fixed ladder 1, and the two vertical rods on the extending ladder 2 are respectively penetrated in the two vertical round pipes 31 from bottom to top.
Claims (1)
1. Upper and lower overhead travelling crane safety interlock includes: fixed cat ladder on vertical crown block girder of being fixed in, its characterized in that: the fixed ladder is provided with an extension ladder which can be retracted on the fixed ladder and a limiting guide mechanism which can limit and guide the extension ladder when the extension ladder is vertically lowered, the lower part of the fixed ladder is provided with a supporting mechanism which can support the extension ladder to enable the extension ladder to be retracted on the fixed ladder, one side of the top end of the fixed ladder is also provided with a proximity switch which is communicated with a crown block control system, when the extension ladder is supported by the supporting mechanism, the upper part of the extension ladder can trigger the proximity switch, and when the proximity switch is triggered, the crown block can normally work; the lifting mechanism is adjusted to enable the lifting mechanism not to lift the extension ladder, and then the extension ladder can be vertically lowered along the fixed ladder, so that an maintainer can climb onto the girder of the crown block through the extension ladder and the fixed ladder, the proximity switch can not be triggered after the extension ladder is lowered, and at the moment, the crown block control system can enable the crown block to be incapable of acting until the proximity switch is triggered again; the structure of the supporting mechanism is as follows: a rotatable hook is arranged on the vertical rod at one side of the lower part of the fixed ladder, and the hook can hook the vertical rod on the extended ladder after rotating to the lower part of the vertical rod at the corresponding side of the extended ladder, so that the extended ladder can be retracted on the fixed ladder; the limiting guide mechanism is two vertical round pipes welded on vertical rods on two sides of the fixed crawling ladder, and the two vertical rods on the extending crawling ladder are respectively penetrated in the two vertical round pipes from bottom to top; the two vertical rods of the fixed cat ladder are respectively provided with a lower bracket, the two lower brackets are equal in height and are positioned below the supporting mechanism, and after the two vertical rods which are arranged on the two sides of the extending cat ladder in a descending manner are respectively inserted into the two lower brackets from top to bottom, the extending cat ladder stops descending; the proximity switch is a photoelectric switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975651.6A CN107673209B (en) | 2017-10-19 | 2017-10-19 | Safety interlocking device for upper and lower crown blocks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975651.6A CN107673209B (en) | 2017-10-19 | 2017-10-19 | Safety interlocking device for upper and lower crown blocks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107673209A CN107673209A (en) | 2018-02-09 |
| CN107673209B true CN107673209B (en) | 2023-11-17 |
Family
ID=61141562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710975651.6A Active CN107673209B (en) | 2017-10-19 | 2017-10-19 | Safety interlocking device for upper and lower crown blocks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107673209B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6378654B1 (en) * | 2000-07-18 | 2002-04-30 | Theodore Ziaylek, Jr. | Ladder pivotally attached to a generally vertically extending surface |
| CN203808815U (en) * | 2014-05-05 | 2014-09-03 | 中联重科股份有限公司 | Crawling ladder assembly and engineering machinery comprising same |
| CN204451013U (en) * | 2014-12-19 | 2015-07-08 | 海天塑机集团有限公司 | Injection machine charging scffold |
| CN104818943A (en) * | 2015-04-29 | 2015-08-05 | 江南嘉捷电梯股份有限公司 | Elevator pit ladder |
| CN205577820U (en) * | 2016-04-29 | 2016-09-14 | 青岛建安建设集团有限公司 | Telescopic roofing cat ladder |
| CN106006391A (en) * | 2016-08-09 | 2016-10-12 | 莱芜钢铁集团有限公司 | Travelling crane and boarding/alighting safety device of travelling crane |
| CN205913682U (en) * | 2016-06-27 | 2017-02-01 | 常熟市华恩机械有限公司 | Back cat ladder that fire engine was used |
| CN207596345U (en) * | 2017-10-19 | 2018-07-10 | 江苏永钢集团有限公司 | Upper and lower overhead traveling crane safety interlock |
-
2017
- 2017-10-19 CN CN201710975651.6A patent/CN107673209B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6378654B1 (en) * | 2000-07-18 | 2002-04-30 | Theodore Ziaylek, Jr. | Ladder pivotally attached to a generally vertically extending surface |
| CN203808815U (en) * | 2014-05-05 | 2014-09-03 | 中联重科股份有限公司 | Crawling ladder assembly and engineering machinery comprising same |
| CN204451013U (en) * | 2014-12-19 | 2015-07-08 | 海天塑机集团有限公司 | Injection machine charging scffold |
| CN104818943A (en) * | 2015-04-29 | 2015-08-05 | 江南嘉捷电梯股份有限公司 | Elevator pit ladder |
| CN205577820U (en) * | 2016-04-29 | 2016-09-14 | 青岛建安建设集团有限公司 | Telescopic roofing cat ladder |
| CN205913682U (en) * | 2016-06-27 | 2017-02-01 | 常熟市华恩机械有限公司 | Back cat ladder that fire engine was used |
| CN106006391A (en) * | 2016-08-09 | 2016-10-12 | 莱芜钢铁集团有限公司 | Travelling crane and boarding/alighting safety device of travelling crane |
| CN207596345U (en) * | 2017-10-19 | 2018-07-10 | 江苏永钢集团有限公司 | Upper and lower overhead traveling crane safety interlock |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107673209A (en) | 2018-02-09 |
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