CA1064454A - Rope guide and a hoist comprising the guide - Google Patents
Rope guide and a hoist comprising the guideInfo
- Publication number
- CA1064454A CA1064454A CA282,533A CA282533A CA1064454A CA 1064454 A CA1064454 A CA 1064454A CA 282533 A CA282533 A CA 282533A CA 1064454 A CA1064454 A CA 1064454A
- Authority
- CA
- Canada
- Prior art keywords
- rope
- drum
- guide
- sectors
- seatings
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/36—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
- B66D1/38—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains by means of guides movable relative to drum or barrel
Abstract
ABSTRACT OF THE DISCLOSURE
A rope guide for guiding a rope being wound onto, or unwound from, a drum includes a plurality of sectors, preferably three, which are connected together to form a ring adapted to surround the drum and turns of rope on the drum, and means for urging at least one of the sectors towards the drum. The sectors are provided with a number of seatings in each of which there is mounted a rotatable rope-engaging member, preferably a ball or a barrel-shaped roller. One of the sectors is provided with a slot for the entry of a rope into the guide, this slot having side walls which converge in the radially-inward direction.
A hoist is claimed which incorporates the rope guide for guiding the rope of the hoist as it is wound onto or from the hoisting drum.
A rope guide for guiding a rope being wound onto, or unwound from, a drum includes a plurality of sectors, preferably three, which are connected together to form a ring adapted to surround the drum and turns of rope on the drum, and means for urging at least one of the sectors towards the drum. The sectors are provided with a number of seatings in each of which there is mounted a rotatable rope-engaging member, preferably a ball or a barrel-shaped roller. One of the sectors is provided with a slot for the entry of a rope into the guide, this slot having side walls which converge in the radially-inward direction.
A hoist is claimed which incorporates the rope guide for guiding the rope of the hoist as it is wound onto or from the hoisting drum.
Description
This invention relates to a rope guide for guiding a rope being wound onto, or unwound Rrom, a drum. In particular, but ~ not exclusively, the invention relates to such a rope guide for - guiding a rope being wound into, or unwound from, a helical ` 5 groove formed in the peripheral surface o~ the drum of a hoist, ~or example an electric hoist. It also relates to a hoist provided with such a rope guide.
; A known rope guide for an electric hoist having a drumprovided with a helical groove in its peripheral surface comprises a nut whose thread has the same profile and pitch as the groove in the drum of the hoist. ~he nut consists of five cast iron sectors joined together by a steel band with the exception of .! .
the adjacent ends of the first and fifth sectors which are connected together by a cleat provided with a slot through which the rope passes into the rope guide. ~his slot serves to guide the rope as it is wound onto, or unwound from, the drum. At one of its ends the nut has an internal peripheral groove in which the rim of a U-shaped rope-pressing member is received. The latter, which ~urrounds the drum of the hoist and is made of plastics material, has it adjacent ends connected together by one or more , .
springs, the tension of which iæ adjustable. In this way the pressing member is tightly pressed against the rope lying in the groove of the hoisting drum. The rope-guiding slot is loc-ated between the nut thread and the U-shaped pressing member and is disposed to coincide exactly ~ith the drum groove. When the hoisting drum rotates, the nut does not rotate around its axis, but is moved along the drum axis, carrying the U-shaped pressing ,.,,. ' '~
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member with it. The latter, of course, together with its sprin& or springs, rotate~ with the drum and is moved axially under the action o~ the nut.
The above-described known rope guide has the following disadvantages:-It is expensive to manufacture, the machining of the internal thread in the cast iron ~ut sectors being particularly costly.
It has considerable deadweight, which decrease~ the capacity of the hoist. ~he efficiency o~ the hoist is reduced by the high ; 10 sliding friction force, which is the sum oY three forces due to friction between the steel drum and the cast iron nut, friction between the U-shaped pressing member and the nut, and frictiQn bet~een the rope and the U-shaped pressing member when the latter i.................................................................. , moves axially along the dr~m. ~urthermore, t~e rope guide has a short service life, due to the large radial dimension of the rope guide and to the fact that the siaes of the slot in the nut, through which the rope passes, are perpendicular to the drum axis.
~ecause of these two factors, i~ the loaded rope deviates ~rom a direction substantially perpendicular to the drum axis, a large bending moment acts on the radially outer edge of the slot, which bending moment can result in breakage of the steel band or the ..
cast iron sectors, or rapid wear of the nut and/or of the rope.
Finally? the large axial length of the rope guide (amounting to about 5~- pitch lengths of the drum groove) means that the hoi~tir~
~;25 drum has to be made considerably longer than that required to provide a given hoisting travel of the rope.
~he present invention aims to eliminate the above-mentioned - disadvantages of the hitherto known rope guide.
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: -~o ~ ccording to the invention, a rope guide for guiding a rope being wound onto, or unwound from, a drum, comprises a plurality of sectors connected together to form a ring adapted to surround the drum and turns of the rope wound thereon, one of said sectors being provided with a slot for the entry of said rope into the guide and each sector having a surface facing inwardly towards the peripheral surface of the drum, a plurality of seatings formed in said inwardly-facing surfaces of the sectors, each of which seatings receives a respective rotatable rope-engaging member in the form of a ball or roller which is rotatable in, and projects inwardly from, its associated seating, and means for urging at least one of said sectors towards the drum, whereby, in use of the guide, said rope-engaging members are urged inwardly into engagement with the rope.
In the case of a rope guide for a hoist having a hoisting drum provided with a helical groove for the reception of the hoisting rope, rope-engaging members in the form of barrel-shaped rollers are mounted in seatings each providing an axis of rotation for its associated roller which is inclined to the drum axis at an angle substantially equal to the helix angle of the drum groove.
Preferably, each of said sectors comprises a shell made of sheet steel, and each of the shells is lined internally with plastics material in which said seatings are formed. In the sector which is provided with a slot for the entry of a rope into the guide, the slot preferably has side walls which converge in the radially-inward direction. This slotted sector ; - . . ; . . . .
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may be made in two parts which can be assembled and dismantled readily to facilitate feeding of the rope into the guide.
Compared with the previously known rope guide described above, the advantages of a rope guide in accordance with the .
present invention and having the preferred features mentioned above are that:-It is cheaper to manufacture, since said sectors do nothave ........................................................
.
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~ ~064~S4 internal screw-thread~. A greater hoisting di~tance can be provided by a drum of the same length, due to the guide having a shorter axial length. Since the rope-engaging members rely on rolling ~riction rather than sliding friction, the overall effic-iency of a hoist employing the guide is higher. Furthermore, both the rope guide and the rope employed therewith have a longer service life, due to the ~act that the converging walls of the rope entry slot allow the rope to deviate ~rom a direction perpendicular to the drum axis without imparting an excessive bending moment on the guide.
The invention will now be described, by way o~ example, with re~erence to the accompanying dra~ing, in which Figure 1 is a side view of one embodiment of a rope guide in accordance with the invention, Figure 2 is a partially sectioned end view of the rope guide, seen in the direction of *he arrow A in Figure 1, and Figures 3 to 6 are sectional views, on an enlarged scale, taken on the lines III - III, IV - IV, V - V and VI - VI, re~p-ecti~ely, in Figure 2.
~he rope guide shown in the drawing is intended ~or use on the drum o~ an electric hoist~ In the ~rawing the numerai 8 designates a helical groove in the peripheral surface of the hoist-ing drum into which the rope 9 o~ the hoist is wound. Apart from these two items 8 and 9, which are shown in broken lines in Figures 3 to 6, the electric hoist is not ~hown.
The rope guide includes three arcuate sectors comprising sheet steel shells la, lb and lo each of ~hich is filled intern-ally with a lining 2a, 2b and 2c, respectively9 made of plastics : . ' . ~ .
'. ' ~ " '. '' .
1064'~S4 material. ~ach o the linings 2a9 2b and 2c i~ provided with seatings 6a for barrel-shaped rollers 3, with seatings 6b for balls 4 and Y~ith seatings 6c for balls 5. ~he seatings 6a, 6b and 6c, which may be moulded in the linings 2a, 2b and 2c, are o~
such dimensions that the rollers 3 and balls 4 and 5 can rotate freely in their respective seatings. The seatings 6a are dispo~ed so that the axes o~ rotation of the rollers 3 are disposed at right angles to the helix of the groove 8.
The shells la and lb are of one piece construction, but the shell lc i9 made in two parts 7a and 7b connected together by screws 20. When assembled together the two parts 7a, 7b define a slot 23 in the shell lc through which the rope 9 enters the guid~, the side walls ol the slot co~verging in the radi~lly-inward direction (see Figures 3 and 4), the included angle between these ide walls being approximately 60. ~he slot 23 is inclined to the side faces of the shell lc at an angle ~ equal to the helix angle o~ the groove 8.
lhe pair of shells la and lb, and the pair of shells la and lc, are connected together by a steel connection member 18 secured to one of the shells of the pair by screws 19 and welded to the other shell of the pair, as can be seen in Figure 2. The shells lb and lc are joined by means of a U-shaped cleat 13 having the free ends of its limbs secured, for example welded or screwedS to the shell lc. A catch 21 secured to the end of the shell lb lying adjacent to the shell lc slides between, and is guided by, the limbs of thé U-shaped cleat 13 and limits the amount by which the adjacent ends of the shells lb and lc can separate from one another.
Adjacent ends of the shells lb and lc are urged towards one another by a pair of helical springs 10 (only one of which can be seen, and is shown in broken lines, in Figure 2). One end of each - . - , .-- : -. :: .: . , . . : :
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spring 10 is anchored to the shell lb and the other end o~ each spring i3 connected to a screw-threaded rod 1', mounted in a cleat 14 secured to the shell lc. The position of each rod 11 in the cleat 14 is adjustable by means of a nut 12. ~y suitably adjusting the nuts 12 the balls 4 are located in the groove 8, and the rollers 3 and the balls 5 of all three shells la, lb and lc are pressed on the rope 9 so that the frictional force re~isting sliding between the rope 9 and the groove 8 is greater than the total frictional force resisting turning of the rollers 3 and balls 4 ~* 5 in their seatings. The sliding friction ~orce arises from the pressing of the rollers 3 and balls 5 against the rope 9 and the pull in the rope due to the load, the deadweight o~ the rope and the weight o~
the hook or other attachment device connected to the rope.
~ Apart from serving as a support for the screw-threaded rods 11~ the cleat 14 also serves as a stop member counteracting a clockwise torque (as viewed in Figure Z) imparted to the rope guide by the rope 9, the cleat being arranged to bear against an abutment 15, which ma~ be a stationar~ portion of the housing of the electric hoist. Another cleat 16, secured by the screws 20 to the end o~ the shell lc lying adjacent the shell la, serves as a stop member counteracting a counter-clockwise torque (as viewed in ~igure 2) , imparted to the rope guide, the cleat 16 being arranged to bear against an abutment 15a, which again may be a stationary portion of the housing of the electric hois~. The cleat 16 may also serve to actuate one or more limit switches controlling the electric hoist. The numeral 17 designates the actuating arm o~ such a limit switch.
; ~ In use o~ the above-described~rope guide, the rollers 3 and the balls 5, rotating in their seatings in the linings 2a, 2b and , ~, .. . .. .
. .
.. . . . . .
' .
2c, press the rope 9 into the drum groove 8 as the drum of the hoist rotates. The pressure exerted on the rope by the rollers 3 and the balls 5 can be adjusted by adjusting the tension of the ~prings 10. As winding or unwinding of the rope proceeds, the rope guide is driven axially along the drum both by engagement of the balls 4 in the groove 8 ana by engagement of the rollers 3 and the balls 5 with the rope, so that the slot 23 is always aligned with the underlying portion o~ the groove 8. As previously mentioned, the side walls o~ the slot 23 converge in the radially-inward direction, and due to this the rope 9 can deviate by upto 30 from a d~rection perpen~icular to the drum axis ~thout ; imparting an excessiYe bending moment on the shell lc. ~rom ~igure 2 it will be seen that rollers 3 are provided adjacent each end o~ the shell lc so that the rope 9 is engaged by a roller 3 15 immediately be~ore it emer8e; from the ~lot 23.
. ~:
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; A known rope guide for an electric hoist having a drumprovided with a helical groove in its peripheral surface comprises a nut whose thread has the same profile and pitch as the groove in the drum of the hoist. ~he nut consists of five cast iron sectors joined together by a steel band with the exception of .! .
the adjacent ends of the first and fifth sectors which are connected together by a cleat provided with a slot through which the rope passes into the rope guide. ~his slot serves to guide the rope as it is wound onto, or unwound from, the drum. At one of its ends the nut has an internal peripheral groove in which the rim of a U-shaped rope-pressing member is received. The latter, which ~urrounds the drum of the hoist and is made of plastics material, has it adjacent ends connected together by one or more , .
springs, the tension of which iæ adjustable. In this way the pressing member is tightly pressed against the rope lying in the groove of the hoisting drum. The rope-guiding slot is loc-ated between the nut thread and the U-shaped pressing member and is disposed to coincide exactly ~ith the drum groove. When the hoisting drum rotates, the nut does not rotate around its axis, but is moved along the drum axis, carrying the U-shaped pressing ,.,,. ' '~
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~6 ~ 5 ~
member with it. The latter, of course, together with its sprin& or springs, rotate~ with the drum and is moved axially under the action o~ the nut.
The above-described known rope guide has the following disadvantages:-It is expensive to manufacture, the machining of the internal thread in the cast iron ~ut sectors being particularly costly.
It has considerable deadweight, which decrease~ the capacity of the hoist. ~he efficiency o~ the hoist is reduced by the high ; 10 sliding friction force, which is the sum oY three forces due to friction between the steel drum and the cast iron nut, friction between the U-shaped pressing member and the nut, and frictiQn bet~een the rope and the U-shaped pressing member when the latter i.................................................................. , moves axially along the dr~m. ~urthermore, t~e rope guide has a short service life, due to the large radial dimension of the rope guide and to the fact that the siaes of the slot in the nut, through which the rope passes, are perpendicular to the drum axis.
~ecause of these two factors, i~ the loaded rope deviates ~rom a direction substantially perpendicular to the drum axis, a large bending moment acts on the radially outer edge of the slot, which bending moment can result in breakage of the steel band or the ..
cast iron sectors, or rapid wear of the nut and/or of the rope.
Finally? the large axial length of the rope guide (amounting to about 5~- pitch lengths of the drum groove) means that the hoi~tir~
~;25 drum has to be made considerably longer than that required to provide a given hoisting travel of the rope.
~he present invention aims to eliminate the above-mentioned - disadvantages of the hitherto known rope guide.
., .
. --. - - . , . ~ . . . . . .~.
: -~o ~ ccording to the invention, a rope guide for guiding a rope being wound onto, or unwound from, a drum, comprises a plurality of sectors connected together to form a ring adapted to surround the drum and turns of the rope wound thereon, one of said sectors being provided with a slot for the entry of said rope into the guide and each sector having a surface facing inwardly towards the peripheral surface of the drum, a plurality of seatings formed in said inwardly-facing surfaces of the sectors, each of which seatings receives a respective rotatable rope-engaging member in the form of a ball or roller which is rotatable in, and projects inwardly from, its associated seating, and means for urging at least one of said sectors towards the drum, whereby, in use of the guide, said rope-engaging members are urged inwardly into engagement with the rope.
In the case of a rope guide for a hoist having a hoisting drum provided with a helical groove for the reception of the hoisting rope, rope-engaging members in the form of barrel-shaped rollers are mounted in seatings each providing an axis of rotation for its associated roller which is inclined to the drum axis at an angle substantially equal to the helix angle of the drum groove.
Preferably, each of said sectors comprises a shell made of sheet steel, and each of the shells is lined internally with plastics material in which said seatings are formed. In the sector which is provided with a slot for the entry of a rope into the guide, the slot preferably has side walls which converge in the radially-inward direction. This slotted sector ; - . . ; . . . .
' ' ' '. '.. ' 1064~S~
may be made in two parts which can be assembled and dismantled readily to facilitate feeding of the rope into the guide.
Compared with the previously known rope guide described above, the advantages of a rope guide in accordance with the .
present invention and having the preferred features mentioned above are that:-It is cheaper to manufacture, since said sectors do nothave ........................................................
.
.~ ' ' .
. . .
' ' ' ' ' :
.:, .1 . .
., .
- 4a -.. , ~ , :
. ~.
:- - . , : . .. .. . . .
- ; :: : ' ': ,.: .: ' ~ : . ,: :: .
~ ~064~S4 internal screw-thread~. A greater hoisting di~tance can be provided by a drum of the same length, due to the guide having a shorter axial length. Since the rope-engaging members rely on rolling ~riction rather than sliding friction, the overall effic-iency of a hoist employing the guide is higher. Furthermore, both the rope guide and the rope employed therewith have a longer service life, due to the ~act that the converging walls of the rope entry slot allow the rope to deviate ~rom a direction perpendicular to the drum axis without imparting an excessive bending moment on the guide.
The invention will now be described, by way o~ example, with re~erence to the accompanying dra~ing, in which Figure 1 is a side view of one embodiment of a rope guide in accordance with the invention, Figure 2 is a partially sectioned end view of the rope guide, seen in the direction of *he arrow A in Figure 1, and Figures 3 to 6 are sectional views, on an enlarged scale, taken on the lines III - III, IV - IV, V - V and VI - VI, re~p-ecti~ely, in Figure 2.
~he rope guide shown in the drawing is intended ~or use on the drum o~ an electric hoist~ In the ~rawing the numerai 8 designates a helical groove in the peripheral surface of the hoist-ing drum into which the rope 9 o~ the hoist is wound. Apart from these two items 8 and 9, which are shown in broken lines in Figures 3 to 6, the electric hoist is not ~hown.
The rope guide includes three arcuate sectors comprising sheet steel shells la, lb and lo each of ~hich is filled intern-ally with a lining 2a, 2b and 2c, respectively9 made of plastics : . ' . ~ .
'. ' ~ " '. '' .
1064'~S4 material. ~ach o the linings 2a9 2b and 2c i~ provided with seatings 6a for barrel-shaped rollers 3, with seatings 6b for balls 4 and Y~ith seatings 6c for balls 5. ~he seatings 6a, 6b and 6c, which may be moulded in the linings 2a, 2b and 2c, are o~
such dimensions that the rollers 3 and balls 4 and 5 can rotate freely in their respective seatings. The seatings 6a are dispo~ed so that the axes o~ rotation of the rollers 3 are disposed at right angles to the helix of the groove 8.
The shells la and lb are of one piece construction, but the shell lc i9 made in two parts 7a and 7b connected together by screws 20. When assembled together the two parts 7a, 7b define a slot 23 in the shell lc through which the rope 9 enters the guid~, the side walls ol the slot co~verging in the radi~lly-inward direction (see Figures 3 and 4), the included angle between these ide walls being approximately 60. ~he slot 23 is inclined to the side faces of the shell lc at an angle ~ equal to the helix angle o~ the groove 8.
lhe pair of shells la and lb, and the pair of shells la and lc, are connected together by a steel connection member 18 secured to one of the shells of the pair by screws 19 and welded to the other shell of the pair, as can be seen in Figure 2. The shells lb and lc are joined by means of a U-shaped cleat 13 having the free ends of its limbs secured, for example welded or screwedS to the shell lc. A catch 21 secured to the end of the shell lb lying adjacent to the shell lc slides between, and is guided by, the limbs of thé U-shaped cleat 13 and limits the amount by which the adjacent ends of the shells lb and lc can separate from one another.
Adjacent ends of the shells lb and lc are urged towards one another by a pair of helical springs 10 (only one of which can be seen, and is shown in broken lines, in Figure 2). One end of each - . - , .-- : -. :: .: . , . . : :
.
. . . . . .
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spring 10 is anchored to the shell lb and the other end o~ each spring i3 connected to a screw-threaded rod 1', mounted in a cleat 14 secured to the shell lc. The position of each rod 11 in the cleat 14 is adjustable by means of a nut 12. ~y suitably adjusting the nuts 12 the balls 4 are located in the groove 8, and the rollers 3 and the balls 5 of all three shells la, lb and lc are pressed on the rope 9 so that the frictional force re~isting sliding between the rope 9 and the groove 8 is greater than the total frictional force resisting turning of the rollers 3 and balls 4 ~* 5 in their seatings. The sliding friction ~orce arises from the pressing of the rollers 3 and balls 5 against the rope 9 and the pull in the rope due to the load, the deadweight o~ the rope and the weight o~
the hook or other attachment device connected to the rope.
~ Apart from serving as a support for the screw-threaded rods 11~ the cleat 14 also serves as a stop member counteracting a clockwise torque (as viewed in Figure Z) imparted to the rope guide by the rope 9, the cleat being arranged to bear against an abutment 15, which ma~ be a stationar~ portion of the housing of the electric hoist. Another cleat 16, secured by the screws 20 to the end o~ the shell lc lying adjacent the shell la, serves as a stop member counteracting a counter-clockwise torque (as viewed in ~igure 2) , imparted to the rope guide, the cleat 16 being arranged to bear against an abutment 15a, which again may be a stationary portion of the housing of the electric hois~. The cleat 16 may also serve to actuate one or more limit switches controlling the electric hoist. The numeral 17 designates the actuating arm o~ such a limit switch.
; ~ In use o~ the above-described~rope guide, the rollers 3 and the balls 5, rotating in their seatings in the linings 2a, 2b and , ~, .. . .. .
. .
.. . . . . .
' .
2c, press the rope 9 into the drum groove 8 as the drum of the hoist rotates. The pressure exerted on the rope by the rollers 3 and the balls 5 can be adjusted by adjusting the tension of the ~prings 10. As winding or unwinding of the rope proceeds, the rope guide is driven axially along the drum both by engagement of the balls 4 in the groove 8 ana by engagement of the rollers 3 and the balls 5 with the rope, so that the slot 23 is always aligned with the underlying portion o~ the groove 8. As previously mentioned, the side walls o~ the slot 23 converge in the radially-inward direction, and due to this the rope 9 can deviate by upto 30 from a d~rection perpen~icular to the drum axis ~thout ; imparting an excessiYe bending moment on the shell lc. ~rom ~igure 2 it will be seen that rollers 3 are provided adjacent each end o~ the shell lc so that the rope 9 is engaged by a roller 3 15 immediately be~ore it emer8e; from the ~lot 23.
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Claims (8)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A rope guide for guiding a rope being wound onto, or unwound from, a drum, comprising a plurality of sectors connected together to form a ring adapted to surround the drum and turns of rope wound thereon, one of said sectors being provided with a slot for the entry of said rope into the guide and each sector having a surface facing inwardly towards the peripheral surface of the drum, a plurality of seatings formed in said inwardly-facing surfaces of the sectors, each of which seatings receives a respective rotatable rope-engaging member in the form of a ball or roller which is rotatable in, and projects inwardly from, its associated seating, and means for urging at least one of said sectors towards the drum,whereby,in use of the guide, said rope-engaging members are urged inwardly into engagement with the rope.
2. A rope guide for guiding a rope being wound onto, or unwound from, a drum, comprising a plurality of sectors connected together to form a ring adapted to surround the drum and turns of rope wound thereon, one of said sectors being provided with a slot for the entry of said rope into the guide, which slot has side walls which converge in the radially-inward direction, and each sector having a surface facing inwardly towards the peripheral surface of the drum, a plurality of seatings formed in said inwardly-facing surfaces of the sectors, each of which seatings receives a respective rotatable rope-engaging member in the form of a wall or roller which is rotatable in, and projects inwardly from, its associated seating, and means for urging at least one of said sectors towards the drum, whereby in use of the guide, said rope-engaging members are urged inwardly into engagement with the rope.
3. A rope guide according to claim 1 or claim 2, in which at least one of said sectors comprises at least one additional seating in which a drum-engaging member is rotatably mounted and which serves, when the rope guide is in use, to move the guide axially of the drum.
4. A rope guide according to claim 1 or claim 2, in which at least one of said sectors comprises at least one additional seating in which a drum-engaging member is rotatably mounted and which serves, when the rope guide is in use, to move the guide axially of the drum and in which said drum-engaging member is a ball.
5. A rope guide according to claim 1 or claim 2, in which each of said sectors comprises a shell made of sheet steel.
6. A rope guide according to claim 1 or claim 2, in which each of said sectors comprises a shell made of sheet steel and in which each of said shells is lined internally with plastics material in which said seatings are formed.
7. A hoist comprising a hoisting drum provided with a helical groove in its peripheral surface for the reception of the hoisting rope of the hoist, said hoist comprising a rope guide encircling the drum, which rope guide is constructed in accordance with claim 1.
8. A hoist according to claim 7, in which at least some of said rope-engaging members are barrel rollers, the seatings for these rollers each providing an axis of rotation for its assoc-iated roller which is inclined to the drum axis at an angle substantially equal to the helix angle of the drum groove.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3010576A GB1546711A (en) | 1976-07-20 | 1976-07-20 | Rope guide and a hoist comprising the guide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1064454A true CA1064454A (en) | 1979-10-16 |
Family
ID=10302359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA282,533A Expired CA1064454A (en) | 1976-07-20 | 1977-07-12 | Rope guide and a hoist comprising the guide |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5314857A (en) |
| AU (1) | AU508707B2 (en) |
| CA (1) | CA1064454A (en) |
| DE (1) | DE2732108A1 (en) |
| FR (1) | FR2359063A1 (en) |
| GB (1) | GB1546711A (en) |
| IT (1) | IT1083662B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3421843A1 (en) * | 1984-06-13 | 1985-12-19 | Mannesmann AG, 4000 Düsseldorf | ROPE GUIDE |
| CA2074307C (en) * | 1991-07-29 | 1995-12-12 | Leslie J. Sell | Rope guide |
| US5482219A (en) * | 1993-11-01 | 1996-01-09 | Tcholakov; Stoil M. | Rope guide for wire air or electric hoists |
| DE19514010C2 (en) * | 1995-04-13 | 2000-07-13 | Sowka Kasimir | Motorized rope drum |
| DE19817933A1 (en) * | 1998-04-17 | 1999-11-04 | Mannesmann Ag | Winch rope guide for aligning rope lines |
| DE102005046900A1 (en) * | 2005-09-30 | 2007-04-05 | Demag Cranes & Components Gmbh | Cable guide of a winch, in particular a Seilhubwinde |
| CN109110668B (en) * | 2018-11-08 | 2024-01-05 | 南京禄口起重机械有限公司 | Electric hoist rope guide convenient to adjust elasticity |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT157178B (en) * | 1938-01-14 | 1939-10-10 | Theodor Ing Kogler | Rope winder for winch drums. |
-
1976
- 1976-07-20 GB GB3010576A patent/GB1546711A/en not_active Expired
-
1977
- 1977-07-12 CA CA282,533A patent/CA1064454A/en not_active Expired
- 1977-07-13 IT IT6861877A patent/IT1083662B/en active
- 1977-07-15 DE DE19772732108 patent/DE2732108A1/en not_active Withdrawn
- 1977-07-18 AU AU27097/77A patent/AU508707B2/en not_active Expired
- 1977-07-19 JP JP8659277A patent/JPS5314857A/en active Pending
- 1977-07-20 FR FR7722218A patent/FR2359063A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| GB1546711A (en) | 1979-05-31 |
| FR2359063A1 (en) | 1978-02-17 |
| DE2732108A1 (en) | 1978-01-26 |
| AU2709777A (en) | 1979-01-25 |
| FR2359063B1 (en) | 1981-05-22 |
| AU508707B2 (en) | 1980-03-27 |
| IT1083662B (en) | 1985-05-25 |
| JPS5314857A (en) | 1978-02-09 |
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