CA2085941A1 - Apparatus and method for securing a load to a lifting means - Google Patents
Apparatus and method for securing a load to a lifting meansInfo
- Publication number
- CA2085941A1 CA2085941A1 CA 2085941 CA2085941A CA2085941A1 CA 2085941 A1 CA2085941 A1 CA 2085941A1 CA 2085941 CA2085941 CA 2085941 CA 2085941 A CA2085941 A CA 2085941A CA 2085941 A1 CA2085941 A1 CA 2085941A1
- Authority
- CA
- Canada
- Prior art keywords
- hook
- load
- carrying means
- carrying
- sensing
- 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.)
- Abandoned
Links
Landscapes
- Control And Safety Of Cranes (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
Abstract of the Disclosure A sensor for sensing the position of a load carrying device relative to a load hook. The sensor includes a switch mounted on the hook for providing an indication of a desired position of the load carrying device. An actuation is also mounted on the hook such that it engages the switch. The actuator means is responsive to the presence of the load carrying device at the desired position to actuate the switch.
The hook is connected to lifting apparatus such as a hoist or crane for lifting a load supported by the carrying device engageable with the hook.
The hook is connected to lifting apparatus such as a hoist or crane for lifting a load supported by the carrying device engageable with the hook.
Description
- 208~41 , .
.";' s APPAR~TU8 ~ND ME~OD FOR 8ECURING A LOAD TO A ~IFTING ME~N8 :
- Field o~ the Invention ~`his invention relates to the securing oE a load to be li~ted ~y a liPting means to a load hook and, in particular, to the positioning of a carrying means for the load relative to a load hook to enable the hook to engage the load support means.
.
Backqround of the Invention Overhead lifting devices are used to lift and carry a variety of types of large loads, some of which are fragile in nature or need particularly careful handling to avoid damage to the load being carried or the people working in the vicinity of the lifting device. An example of the latter type of problem is the lifting and transporting of liquid such as molten steel. Molten steel is a very heavy material and, at the same time, it is typically necessary to lift and carry large amounts of the molten steel for purposes of productivity. However, it is quite difficult to control very large types of equipment needed to lift large ladles of molten steel in a manner such that the ladles will not spill the steel. In particular, the picking up of very full ladles of molten steel with a load hook requires very careful movement .
to avoid jerking and tipping of the ladle and consequent j `' spilling. The disclosed apparatus and method is intended to .~. .,. 1 "''"~`` :
.";' s APPAR~TU8 ~ND ME~OD FOR 8ECURING A LOAD TO A ~IFTING ME~N8 :
- Field o~ the Invention ~`his invention relates to the securing oE a load to be li~ted ~y a liPting means to a load hook and, in particular, to the positioning of a carrying means for the load relative to a load hook to enable the hook to engage the load support means.
.
Backqround of the Invention Overhead lifting devices are used to lift and carry a variety of types of large loads, some of which are fragile in nature or need particularly careful handling to avoid damage to the load being carried or the people working in the vicinity of the lifting device. An example of the latter type of problem is the lifting and transporting of liquid such as molten steel. Molten steel is a very heavy material and, at the same time, it is typically necessary to lift and carry large amounts of the molten steel for purposes of productivity. However, it is quite difficult to control very large types of equipment needed to lift large ladles of molten steel in a manner such that the ladles will not spill the steel. In particular, the picking up of very full ladles of molten steel with a load hook requires very careful movement .
to avoid jerking and tipping of the ladle and consequent j `' spilling. The disclosed apparatus and method is intended to .~. .,. 1 "''"~`` :
2~8~9~
provide a solution to this problem and, in general, enable smooth, firm initial engagement and lifting operations with , the load hook.
8ummarv of the Invention It .Is ~ general object of the invention to provide an ` appara~tu~ and method for relative positioning of a carrying means and the hook of a lifting means to enable the hook to smoothly engage the carrying means prior to and as the load is , li~ted. It is a further object of the invention to provide a sensing apparatus for indicating the relative position of a ' load carrying means and a load hook.
; The invention is accomplished by providing a sensing means for sensing the position of a load carrying means ` ~ relative to a load hook by mounting a switch means on the hook ~or providing an indication of a desired position of the load ;~ carrying means. Actuating means is also mounted on the hook :
` `~ such that it engages the switch means. The actuating means is ,, :
~;~ responsive to the presence of the load carrying means at the ~` desired position to actuate the switch means.
- - The hook is typically connected to a lifting means such .
as a hoist or crane for lifting a load supported by a carrying n~eans engageable with the hook. The hook includes an upper ~ end connected to the lifting means and a lower curved load :i support section connected to the upper end. The sensing means senses the presence of the carrying means at a position ~ .
~` suitable for engaging the curved section of the hook with the carrying means. The sensing means may comprise an arm engaged " 2 ~`
~'`:~' . ~ . .
20~5~1 , --by the carrying means for sensing the presence of the latter, a switch means mounted on the hook, and a rod mounted on the hook and movable in response to movement of the arm. Movement o~ th~ rod operates the switch to cause it to indicate the pr~nc~ o~ the aarrying means at the desired position. The prcrerabLe pOsitioll of the load carrying means relative to the hook prior to engaging the hook with the carrying means to lift a load is above the load carrying section of the hook.
I-lowever, other positions may be desirable depending on the type of load lifting means, hooX characteristics, and type of load being lifted.
The load carrying means is positioned relative to the hook by moving the hook with a lifting means toward the carrying means such that the carrying means is in a position ad;acent to the load carrying section of the hook. The position of the load carrying means is sensed and an indication of such position is produced if the load carrying means is in the position necessary for it and its load to be lifted. If the carrying means is not at the desired position, the hook is further moved until the carrying means is in such position and an indication is provided. The load carrying section of the hook may then be moved into engagement with the . .~ . :
carrying means and the load carrying means and load lifted to ~`` another location.
Brief DescriPtion of the Drawinqs ~` Further objects and advantages of the invention will appear when taken in conjunction with the accompanying ~"`"``, , '~
- .
: 2~8~41 .: .~` -drawings in which:
Fig. 1 is a perspective view of an overhead trolley and hoist incorporating the apparatus of the invention;
I~'ig. 2 i5 a side elevation view of the trolley and a load hook li~tin~ a load carrying means and load;
I~ig. 3 is an end elevation view of the trolley, the load ' ' hook and the load carrying means shown in Fig. 2;
Fig. 4 is a cross-sectional view of the load hook according to the instant invention; and Fig. 5 is a cross-sectional view of the load hook according to the instant invention with a trunnion of a load carrying means in a position necessary to enable the hook to engage the trunnion and lift the load.
" ~ ' , Detailed Description of the Invention `~ Referring generally to Figs. 1, 2, and 3, a trolley 20 ~`` carrying a load lifting means or hoist 30 is shown supported '~ on and movable along a pair of parallel tracks 32 and 34 supported on an overhead crane. The crane is not shown `` inasmuch as it is a well-known prior art apparatus. The trolley includes trucks 22 and 24, wheels 28 mounted on the trucks and notable on the tracks 32, 34, and a drive means 26 for driving at least one of the wheels 28.
The hoist 30 includes a pair of rotatable drums 36, 38 mounted on the trolley, motor drive means 39 for the drums 36, ,~ ~
.~ ` 38, ropes 40 extending downward from the drums 36, 38 and from ~" upper sheaves 41 to lower sheaves 4 2 which are rotatably mounted on a sheave block 44 attached to a lifting beam 45.
_ 4 _ ` ` ~' ~ , "'' `` `,`` '. ' ',.""" ',',' ".,,,'.",'~,'.'.'''.,."` ' 2 ~
Load hooks 46 for lifting a load is connected to the lifting beam 45. ~ load carrying means such as a ladle 58 for supporting and carrying a load 60 such as molten steel is 5U pcnded Erom the hooks ~6. The ladle 58 includes a bucket G0, a palr of support arms 62, 64 extending upward from the buck~t and each having a pair of spaced apart plates 66, 68, and a trunnion 69 connected between the plates 66, 6~. A
tilting handle 65 is also attached to a lower side of the bucket. The trolley 20 also carries an auxiliary hoist 48 having a motor 50 and drum 52, rope means 54 and a hook 56, as shown in Fig. 2, for tilting the ladle when it is wished to dump its contents.
With rePerence to Figs. 4 and 5, each load hook 46 has an upper end 70 connected to the lifting beam 45 by means of a pin 76, an upwardly projecting distil end 72 spaced from the upper end 70, and a lower curved load supporting section 74 connecting the distil and upper ends. Each hook 46 also has a hook engaging surface 90 along the upper end 70, the curved section 74 and the distil end 72, and an outer surface 92 along the outside of the hook which does not normally engage a load. The surface 90 contains a groove 91 for receiving a sensing arm 78 as described below. Sensing means 80 for sensing the presence of a trunnion 69 at a position adjacent to the hook 46 or above the curved section 74 of the hook is mounted on at least one of on the hooks 46. The sensing means 80 includes a sensing arm 78 pivotally mounted at pivot bracket 82 on the upper end 70 of a hook, a limit switch 84 having a toggle arm 86, an opening 88 through the hook between 5 _ - -: 2~8~
the hook surface 90 and the hook outer surface 92, and a sensor rod 96 projecting from the opening 88 and extending within a sleeve 9~ between the surface 92 and the outer sur~ace 92. Adjacent the outer surface 92, the sensor rod 96 has an ~nlarged rear end 98 for engagement with the toggle arm ~G of th~ limit switch. Adjacent the surface 90, the sensor rod 96 has an enlarged end 100 for engagement with the sensing arm 78. The end 100 also cooperates with the sleeve 94 to retain a spring 102 which biases the sensor rod in a direction away from the toggle arm ~6 of the limit switch. The sensing arm 78 remains out of contact, unless engaged by a trunnion 69, with the sensor rod 96 due to gravitational force maintaining it away from the surface 90. An electrical wire 104 connects the limit switch with the hoist control or an indication devica (not shown) for the hoist 9 on the trolley.
A groove 106 is provided along the outer surface 92 of the hook for receiving the wire 104 and protecting it from mechanical abuse. A flexible conduit 108 receives the wire when it leaves the hook for protecting the wire along its length (not shown) between the hook and the trolley.
In its operation to lift and carry a load and a load carrying means such as molten steel in the ladle 58, the hooks 46 are moved toward the trunnions of the ladle by movement of the trolley 20 on the tracks 32, 34 and by raising or lowering of the hoist 30 and thereby raising and lowering of the hooks 46. The hooks will thus be moved such that each trunnion becomes adjacent to a surface 90 of a hook and is preferably ,~ , ~ positioned above the curved section 74 of a hook. This . . .
~ - 6 -.
, movement may be done slowly or in steps such that the position oE each trunnion 69 relative to a hook and each sensing means ~0 is as shown in Fig. 4, before thP hook moves such that the trunnion is in a position above the curved section 74. When a trunnion 69 and a hook 46 are adjacent to each other as shown ~n FicJ. ~, the hooJc m~y be Eurther moved slowly or in steps so thAt th~ trunnion moves into engagement or near engagement with the hook, as shown in Fig. 5, along the surface 90 at which the sensing arm 78 is located and moves the arm 78 into the groove 91. When in this position, the trunnion 69 will depress the sensing arm 78 so that it in turn pushes the sensor rod 96 against the spring 100 bias and moves the toggle arm 86 of the limit switch to the right relative to the views , . ~ " .
i of Figs. 4 and 5. The limit switch is thereby switched from a condition in which a signal or indication is provided . `` indicating that the trunnion is not at a desired position to a condition in which a signal or indication is provided ~ indicating that the trunnion is in the desired position above r the curved section 74 of the hook. This indication may be `~ transmitted to the hoist control or indicating device via wire 106. The hoist 30 then may be operated to raise the hooks 46 ~` together so that a trunnion and curved section of a hook move `i`` into engagement with each other. The hoist may then be further raised to lift the ladle and load and move them to -~ another desired location.
`~ When a location is reached at which it is desired to dump ; ~ the contents of the ladle, the auxiliary hoist 48 is operated to lower the hook 56 into engagement with the tilting handle ` . ;
~ ~ .
:` .~` . .
` . " ` . ~ ,` , `"'~., ' ,' '`:" ' ' ' `' ' ' ' i ',, ," " " i " ,j, , - " . , , ,,, ,~ "" , : , ~
` `"' ``" `' ~ . `"``" ` `,`" `'.` " ''. "' .'' '' . ' '' ' , '' '.' . .'' ' i ''. ''' ''' ., "' ;' ' ', ;"
20859-~
65. Movement in a raising direction of the hoist 48 a short distance will cause the ladle to pivot about the trunnions and dump the ladle contents.
It may be noted that the position of a trunnion prior to ~ncJaging it with A load carry section of a hook need not n~ccssarlly be at a position above the curved section of a hook. In this regard, the desired position of a trunnion relative to a hook just prior their load carrying engagement depends on factors such as the type of load carrying means, the shape of the hook and the type of load being carried.
It will be understood that the foregoing description of the present invention is for purposes of illustration, and that the invention is susceptible to a number of modifications or changes, none of which entail any departure from the spirit and scope of the present invention as defined in the hereto appended claims.
. -.. . .
, .
. . .
. . ~
`;`,'; ' .
." "` ' .
.
~ ~``,``~; ' ' . .
~ ~ .
~ -- 8 --. . ~
.. ,.... ., .,,, . : .s;,., .. , .. , . . " ~ ... , , " .... . . . .
provide a solution to this problem and, in general, enable smooth, firm initial engagement and lifting operations with , the load hook.
8ummarv of the Invention It .Is ~ general object of the invention to provide an ` appara~tu~ and method for relative positioning of a carrying means and the hook of a lifting means to enable the hook to smoothly engage the carrying means prior to and as the load is , li~ted. It is a further object of the invention to provide a sensing apparatus for indicating the relative position of a ' load carrying means and a load hook.
; The invention is accomplished by providing a sensing means for sensing the position of a load carrying means ` ~ relative to a load hook by mounting a switch means on the hook ~or providing an indication of a desired position of the load ;~ carrying means. Actuating means is also mounted on the hook :
` `~ such that it engages the switch means. The actuating means is ,, :
~;~ responsive to the presence of the load carrying means at the ~` desired position to actuate the switch means.
- - The hook is typically connected to a lifting means such .
as a hoist or crane for lifting a load supported by a carrying n~eans engageable with the hook. The hook includes an upper ~ end connected to the lifting means and a lower curved load :i support section connected to the upper end. The sensing means senses the presence of the carrying means at a position ~ .
~` suitable for engaging the curved section of the hook with the carrying means. The sensing means may comprise an arm engaged " 2 ~`
~'`:~' . ~ . .
20~5~1 , --by the carrying means for sensing the presence of the latter, a switch means mounted on the hook, and a rod mounted on the hook and movable in response to movement of the arm. Movement o~ th~ rod operates the switch to cause it to indicate the pr~nc~ o~ the aarrying means at the desired position. The prcrerabLe pOsitioll of the load carrying means relative to the hook prior to engaging the hook with the carrying means to lift a load is above the load carrying section of the hook.
I-lowever, other positions may be desirable depending on the type of load lifting means, hooX characteristics, and type of load being lifted.
The load carrying means is positioned relative to the hook by moving the hook with a lifting means toward the carrying means such that the carrying means is in a position ad;acent to the load carrying section of the hook. The position of the load carrying means is sensed and an indication of such position is produced if the load carrying means is in the position necessary for it and its load to be lifted. If the carrying means is not at the desired position, the hook is further moved until the carrying means is in such position and an indication is provided. The load carrying section of the hook may then be moved into engagement with the . .~ . :
carrying means and the load carrying means and load lifted to ~`` another location.
Brief DescriPtion of the Drawinqs ~` Further objects and advantages of the invention will appear when taken in conjunction with the accompanying ~"`"``, , '~
- .
: 2~8~41 .: .~` -drawings in which:
Fig. 1 is a perspective view of an overhead trolley and hoist incorporating the apparatus of the invention;
I~'ig. 2 i5 a side elevation view of the trolley and a load hook li~tin~ a load carrying means and load;
I~ig. 3 is an end elevation view of the trolley, the load ' ' hook and the load carrying means shown in Fig. 2;
Fig. 4 is a cross-sectional view of the load hook according to the instant invention; and Fig. 5 is a cross-sectional view of the load hook according to the instant invention with a trunnion of a load carrying means in a position necessary to enable the hook to engage the trunnion and lift the load.
" ~ ' , Detailed Description of the Invention `~ Referring generally to Figs. 1, 2, and 3, a trolley 20 ~`` carrying a load lifting means or hoist 30 is shown supported '~ on and movable along a pair of parallel tracks 32 and 34 supported on an overhead crane. The crane is not shown `` inasmuch as it is a well-known prior art apparatus. The trolley includes trucks 22 and 24, wheels 28 mounted on the trucks and notable on the tracks 32, 34, and a drive means 26 for driving at least one of the wheels 28.
The hoist 30 includes a pair of rotatable drums 36, 38 mounted on the trolley, motor drive means 39 for the drums 36, ,~ ~
.~ ` 38, ropes 40 extending downward from the drums 36, 38 and from ~" upper sheaves 41 to lower sheaves 4 2 which are rotatably mounted on a sheave block 44 attached to a lifting beam 45.
_ 4 _ ` ` ~' ~ , "'' `` `,`` '. ' ',.""" ',',' ".,,,'.",'~,'.'.'''.,."` ' 2 ~
Load hooks 46 for lifting a load is connected to the lifting beam 45. ~ load carrying means such as a ladle 58 for supporting and carrying a load 60 such as molten steel is 5U pcnded Erom the hooks ~6. The ladle 58 includes a bucket G0, a palr of support arms 62, 64 extending upward from the buck~t and each having a pair of spaced apart plates 66, 68, and a trunnion 69 connected between the plates 66, 6~. A
tilting handle 65 is also attached to a lower side of the bucket. The trolley 20 also carries an auxiliary hoist 48 having a motor 50 and drum 52, rope means 54 and a hook 56, as shown in Fig. 2, for tilting the ladle when it is wished to dump its contents.
With rePerence to Figs. 4 and 5, each load hook 46 has an upper end 70 connected to the lifting beam 45 by means of a pin 76, an upwardly projecting distil end 72 spaced from the upper end 70, and a lower curved load supporting section 74 connecting the distil and upper ends. Each hook 46 also has a hook engaging surface 90 along the upper end 70, the curved section 74 and the distil end 72, and an outer surface 92 along the outside of the hook which does not normally engage a load. The surface 90 contains a groove 91 for receiving a sensing arm 78 as described below. Sensing means 80 for sensing the presence of a trunnion 69 at a position adjacent to the hook 46 or above the curved section 74 of the hook is mounted on at least one of on the hooks 46. The sensing means 80 includes a sensing arm 78 pivotally mounted at pivot bracket 82 on the upper end 70 of a hook, a limit switch 84 having a toggle arm 86, an opening 88 through the hook between 5 _ - -: 2~8~
the hook surface 90 and the hook outer surface 92, and a sensor rod 96 projecting from the opening 88 and extending within a sleeve 9~ between the surface 92 and the outer sur~ace 92. Adjacent the outer surface 92, the sensor rod 96 has an ~nlarged rear end 98 for engagement with the toggle arm ~G of th~ limit switch. Adjacent the surface 90, the sensor rod 96 has an enlarged end 100 for engagement with the sensing arm 78. The end 100 also cooperates with the sleeve 94 to retain a spring 102 which biases the sensor rod in a direction away from the toggle arm ~6 of the limit switch. The sensing arm 78 remains out of contact, unless engaged by a trunnion 69, with the sensor rod 96 due to gravitational force maintaining it away from the surface 90. An electrical wire 104 connects the limit switch with the hoist control or an indication devica (not shown) for the hoist 9 on the trolley.
A groove 106 is provided along the outer surface 92 of the hook for receiving the wire 104 and protecting it from mechanical abuse. A flexible conduit 108 receives the wire when it leaves the hook for protecting the wire along its length (not shown) between the hook and the trolley.
In its operation to lift and carry a load and a load carrying means such as molten steel in the ladle 58, the hooks 46 are moved toward the trunnions of the ladle by movement of the trolley 20 on the tracks 32, 34 and by raising or lowering of the hoist 30 and thereby raising and lowering of the hooks 46. The hooks will thus be moved such that each trunnion becomes adjacent to a surface 90 of a hook and is preferably ,~ , ~ positioned above the curved section 74 of a hook. This . . .
~ - 6 -.
, movement may be done slowly or in steps such that the position oE each trunnion 69 relative to a hook and each sensing means ~0 is as shown in Fig. 4, before thP hook moves such that the trunnion is in a position above the curved section 74. When a trunnion 69 and a hook 46 are adjacent to each other as shown ~n FicJ. ~, the hooJc m~y be Eurther moved slowly or in steps so thAt th~ trunnion moves into engagement or near engagement with the hook, as shown in Fig. 5, along the surface 90 at which the sensing arm 78 is located and moves the arm 78 into the groove 91. When in this position, the trunnion 69 will depress the sensing arm 78 so that it in turn pushes the sensor rod 96 against the spring 100 bias and moves the toggle arm 86 of the limit switch to the right relative to the views , . ~ " .
i of Figs. 4 and 5. The limit switch is thereby switched from a condition in which a signal or indication is provided . `` indicating that the trunnion is not at a desired position to a condition in which a signal or indication is provided ~ indicating that the trunnion is in the desired position above r the curved section 74 of the hook. This indication may be `~ transmitted to the hoist control or indicating device via wire 106. The hoist 30 then may be operated to raise the hooks 46 ~` together so that a trunnion and curved section of a hook move `i`` into engagement with each other. The hoist may then be further raised to lift the ladle and load and move them to -~ another desired location.
`~ When a location is reached at which it is desired to dump ; ~ the contents of the ladle, the auxiliary hoist 48 is operated to lower the hook 56 into engagement with the tilting handle ` . ;
~ ~ .
:` .~` . .
` . " ` . ~ ,` , `"'~., ' ,' '`:" ' ' ' `' ' ' ' i ',, ," " " i " ,j, , - " . , , ,,, ,~ "" , : , ~
` `"' ``" `' ~ . `"``" ` `,`" `'.` " ''. "' .'' '' . ' '' ' , '' '.' . .'' ' i ''. ''' ''' ., "' ;' ' ', ;"
20859-~
65. Movement in a raising direction of the hoist 48 a short distance will cause the ladle to pivot about the trunnions and dump the ladle contents.
It may be noted that the position of a trunnion prior to ~ncJaging it with A load carry section of a hook need not n~ccssarlly be at a position above the curved section of a hook. In this regard, the desired position of a trunnion relative to a hook just prior their load carrying engagement depends on factors such as the type of load carrying means, the shape of the hook and the type of load being carried.
It will be understood that the foregoing description of the present invention is for purposes of illustration, and that the invention is susceptible to a number of modifications or changes, none of which entail any departure from the spirit and scope of the present invention as defined in the hereto appended claims.
. -.. . .
, .
. . .
. . ~
`;`,'; ' .
." "` ' .
.
~ ~``,``~; ' ' . .
~ ~ .
~ -- 8 --. . ~
.. ,.... ., .,,, . : .s;,., .. , .. , . . " ~ ... , , " .... . . . .
Claims (22)
1. Sensing means for sensing the position of a load carrying means relative to a load hook comprising:
switch means mounted on the hook for providing an indication of said position of the load carrying means; and actuating means mounted on the hook and connected to the switch means, the actuating means being responsive to the presence of the load carrying means at said position to actuate the switch means.
switch means mounted on the hook for providing an indication of said position of the load carrying means; and actuating means mounted on the hook and connected to the switch means, the actuating means being responsive to the presence of the load carrying means at said position to actuate the switch means.
2. The sensing means according to claim 1 wherein:
the load hook has a surface engageable with the load carrying means;
said position is adjacent the surface; and the actuating means is located adjacent to the surface.
the load hook has a surface engageable with the load carrying means;
said position is adjacent the surface; and the actuating means is located adjacent to the surface.
3. The sensing means according to claim 2 wherein the switch means is located at a distance from the surface.
4. A hook connected to a lifting means for lifting a load supported by a carrying means engageable with the hook, comprising:
an upper end connected to the lifting means;
a lower curved load supporting section connected to the upper end; and sensing means mounted on the hook for sensing the presence of the carrying means at a position suitable for engaging the curved section of the hook with the carrying means.
an upper end connected to the lifting means;
a lower curved load supporting section connected to the upper end; and sensing means mounted on the hook for sensing the presence of the carrying means at a position suitable for engaging the curved section of the hook with the carrying means.
5. The hook according to claim 4 wherein the sensing means comprises an arm engaged by the carrying means for sensing the presence of the carrying means.
6. The hook according to claim 4 wherein the sensing means is mounted on the upper end and senses the presence of the carrying means at the position above the curved section of the hook.
7. The hook according to claim 6 wherein the sensing means comprises an arm engageable by the carrying means for sensing the presence of the carrying means.
8. The hook according to claim 5 wherein:
the arm is movable when engaged by the carrying means; and the sensing means comprises a rod movable in reponse to movement of the arm to indicate the presence of the carrying means at said position.
the arm is movable when engaged by the carrying means; and the sensing means comprises a rod movable in reponse to movement of the arm to indicate the presence of the carrying means at said position.
9. The hook according to claim 8 wherein:
the sensing means includes switch means having a condition indicating the presence of the carrying means at said position; and the switch means is movable to said condition in response to movement of the rod.
the sensing means includes switch means having a condition indicating the presence of the carrying means at said position; and the switch means is movable to said condition in response to movement of the rod.
10. The hook according to claim 9 wherein:
the arm is pivotally mounted on the upper end and movable into and out of engagement with the rod; and the arm is out of engagement with the rod when the carrying means is not at said position and in engagement with the rod when the carrying means is at said position.
the arm is pivotally mounted on the upper end and movable into and out of engagement with the rod; and the arm is out of engagement with the rod when the carrying means is not at said position and in engagement with the rod when the carrying means is at said position.
11. The hook according to claim 9 wherein:
the hook has a surface facing the carrying means when the latter is present at said position; and the rod extends through the hook and extends out of the surface when the carrying means is not at said position.
the hook has a surface facing the carrying means when the latter is present at said position; and the rod extends through the hook and extends out of the surface when the carrying means is not at said position.
12. The hook according to claim 11 wherein the carrying means comprises a trunnion.
13. The hook according to claim 2 wherein:
the hook has a surface facing the carrying means and a groove in the surface; and the arm has a position within the groove when the arm is engaged by the carrying means.
the hook has a surface facing the carrying means and a groove in the surface; and the arm has a position within the groove when the arm is engaged by the carrying means.
14. A method of positioning a hook connected to a load lifting means relative to a carrying means for a load, the hook including a load carrying section, comprising the steps of:
moving the hook with the lifting means toward the carrying means such that the latter is in a position adjacent to the load carrying section of the hook;
sensing on the hook whether the carrying means is present at said position and producing an indication when the carrying means is in said position; and further moving the hook if the carrying means is not at said position until an indication is produced that the carrying means is at said position.
moving the hook with the lifting means toward the carrying means such that the latter is in a position adjacent to the load carrying section of the hook;
sensing on the hook whether the carrying means is present at said position and producing an indication when the carrying means is in said position; and further moving the hook if the carrying means is not at said position until an indication is produced that the carrying means is at said position.
15. The method according to claim 14 wherein the sensing step includes sensing the engagement of the carrying means with the hook.
16. The method according to claim 15 wherein the hook includes switch means and the sensing step is accomplished by actuation of switch means on the hook when the carrying means is in said position.
17. The method according to claim 15 wherein the step of moving the hook comprises moving the hook such that the carrying means is above the load carrying section of the hook.
18. A method of engaging a hook connected to a load lifting means with carrying means of a support means for a load, the hook including a load carrying section comprising the steps of:
initially moving the hook with the lifting means toward the carrying means such that the latter is in a position adjacent the load carrying section of the hook;
sensing whether the carrying means is present at said position and producing a signal at the hook if the carrying means is at said position;
if the signal is not produced during the initial movement of the hook, further moving the hook toward said position until the signal is produced; and moving the load carrying section of the hook into engagement with the carrying means.
initially moving the hook with the lifting means toward the carrying means such that the latter is in a position adjacent the load carrying section of the hook;
sensing whether the carrying means is present at said position and producing a signal at the hook if the carrying means is at said position;
if the signal is not produced during the initial movement of the hook, further moving the hook toward said position until the signal is produced; and moving the load carrying section of the hook into engagement with the carrying means.
19. The method according to claim 18 comprising the further step of transmitting the signal from the hook to a location remote from the hook.
20. The method according to claim 18 wherein the steps of initially and further moving the hook comprise moving the hook toward the carrying means until the latter is above the load carrying section of the hook.
21. The method according to claim 18 wherein the hook includes switch means and the sensing step is accomplished by actuation of the switch means when the carrying means is in said position.
22. The method according to claim 21 wherein the switch means includes a switch arm and the sensing step is accomplished by movement of the switch arm by the carrying means when the hook moves toward the carrying means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US94102292A | 1992-09-04 | 1992-09-04 | |
| US941,022 | 1992-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2085941A1 true CA2085941A1 (en) | 1994-03-05 |
Family
ID=25475811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2085941 Abandoned CA2085941A1 (en) | 1992-09-04 | 1992-12-21 | Apparatus and method for securing a load to a lifting means |
Country Status (3)
| Country | Link |
|---|---|
| BR (1) | BR9303668A (en) |
| CA (1) | CA2085941A1 (en) |
| MX (1) | MX9305436A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580971A (en) * | 2012-02-28 | 2012-07-18 | 张家港市超声电气有限公司 | Catching device for ultrasonic cleaning equipment |
| CN109019350A (en) * | 2018-08-13 | 2018-12-18 | 攀钢集团西昌钢钒有限公司 | A kind of warning device and bridge crane of anti-plate hook bill hanging pot trunnion |
| CN113479775A (en) * | 2021-06-28 | 2021-10-08 | 杭州鸿泉物联网技术股份有限公司 | Crane hoisting identification method and system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436338B (en) * | 2019-07-25 | 2020-06-26 | 太原重工股份有限公司 | Lifting appliance unhooking guide device and method |
-
1992
- 1992-12-21 CA CA 2085941 patent/CA2085941A1/en not_active Abandoned
-
1993
- 1993-08-31 BR BR9303668A patent/BR9303668A/en not_active Application Discontinuation
- 1993-09-03 MX MX9305436A patent/MX9305436A/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580971A (en) * | 2012-02-28 | 2012-07-18 | 张家港市超声电气有限公司 | Catching device for ultrasonic cleaning equipment |
| CN102580971B (en) * | 2012-02-28 | 2014-03-19 | 张家港市超声电气有限公司 | Catching device for ultrasonic cleaning equipment |
| CN109019350A (en) * | 2018-08-13 | 2018-12-18 | 攀钢集团西昌钢钒有限公司 | A kind of warning device and bridge crane of anti-plate hook bill hanging pot trunnion |
| CN113479775A (en) * | 2021-06-28 | 2021-10-08 | 杭州鸿泉物联网技术股份有限公司 | Crane hoisting identification method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| MX9305436A (en) | 1994-03-31 |
| BR9303668A (en) | 1994-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4556358A (en) | Portable hoist | |
| US7455338B2 (en) | Leveling device for lifting apparatus and associated methods | |
| US5489032A (en) | Manipulator for masonry wall construction and the like | |
| US3103282A (en) | Article grab | |
| US3269560A (en) | Safety control for cranes | |
| CA1252759A (en) | Attachment apparatus for crane or the like | |
| CA2085941A1 (en) | Apparatus and method for securing a load to a lifting means | |
| US4280628A (en) | Anti-two block system | |
| JPH01256496A (en) | Load vibration preventer at time of ungrounding of slinging load of crane with boom | |
| US3790204A (en) | Grapple with semi-automatic latch | |
| EP0160021B1 (en) | A device for lifting and handling objects | |
| KR102465053B1 (en) | Laser welding machine support system | |
| GB2353513A (en) | Crane lifting capacity optimisation | |
| KR101245513B1 (en) | Equipped with sensors and sensor-operated unmanned crane hook | |
| US2786709A (en) | Log handling tongs | |
| US4911313A (en) | Linkage lifting apparatus | |
| US3367513A (en) | Soaking pit crane | |
| EP0197210B1 (en) | Apparatus for charging scrap into a furnace | |
| JP2842780B2 (en) | Cylindrical heavy lifting equipment | |
| JP3487193B2 (en) | Grab bucket landing detection device | |
| JPS63277194A (en) | Balance weight operating device for conuter balance crane | |
| CA2169878A1 (en) | Directional indicating device for detecting improper orientation of a hoist lifting line | |
| KR101119003B1 (en) | Transfer control method of overhead crane for coil transfer | |
| US867589A (en) | Hay-carrier. | |
| US1439945A (en) | Distant control for industrial cranes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |