US3651951A - Jib crane - Google Patents
Jib crane Download PDFInfo
- Publication number
- US3651951A US3651951A US27520A US3651951DA US3651951A US 3651951 A US3651951 A US 3651951A US 27520 A US27520 A US 27520A US 3651951D A US3651951D A US 3651951DA US 3651951 A US3651951 A US 3651951A
- Authority
- US
- United States
- Prior art keywords
- jib
- rollers
- rail
- main post
- frame
- 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 - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
- B66C23/24—Mobile wall cranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C7/00—Runways, tracks or trackways for trolleys or cranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
- B66C2700/0321—Travelling cranes
- B66C2700/0328—Cranes on rails or on rail vehicles
- B66C2700/035—Construction details related to the travelling, to the supporting of the crane or to the blocking of the axles; Outriggers; Coupling of the travelling mechanism to the crane mechanism
Definitions
- This invention relates to a jib crane.
- the object of this invention is to provide a jib crane traveling on a single rail and having a load supporting member which may be swung through an angle of 360.
- a conventional jib crane travels on two rails and the jib is pivoted to swing freely about the main post. Since it needs two rails, its installation takes up a great deal of space; it cannot swing through 360; and it has a complicated mechanism.
- FIG. 1 is a side view of a jib crane according to my invention
- FIG. 2 is a sectional view taken along the line II-Il of FIG. 1;
- FIG. 3 is a partial longitudinal sectional view of the swingable part of the jib
- FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3;
- FIG. 5 is a side view of the traveling part
- FIG. 6 is a sectional view of the hoist supporting beam.
- my crane comprises a single supporting rail 1 and a single guide rail 2 parallel to and above this rail.
- this guide rail is shown with a C-shaped section.
- a base frame 3 equipped with wheels 4, which roll on the rail 1, and with two rollers 6 which contact both sides of the vertical web of this traveling rail 1 is mounted upon the supporting rail 1.
- the rollers 6 have a narrow stepped upper portion 6', best seen in FIG. 5.
- the lateral edges of the upper part of the rail are gripped between the stepped portions 6 and the lower surfaces of this upper part engage the wider portions of the rollers.
- the wheels 4 of the base frame 3 roll on the rail 1 and are driven by a motor 5 on the frame 3.
- the main post 7 stands upright on the base frame 3. From the top end of the main post 7 projects a pin 8, at the top of which is rotatably mounted a roller 9, which engages the groove in the above-mentioned guide rail 2.
- the main post 7 carries an annular flange 10.
- the upper end of the base of the jib 12 is pivotally mounted by means of the bearing 11 on the pin 8 at the top of the main post.
- the wheels 13 attached to the lower part of the base of the jib 12 contact the annular flange of the main post.
- These wheels are mounted on the same shaft as the large gear 15 driven by the motor 14. Therefore, when the motor 14 runs, its motion is transmitted to the wheels, which, guided by the annular flange 10, travel, together with the jib 12, around the main post.
- the arrangement is more stable, when there are two wheels which contact the annular flange 10. In FIG.
- 16 is a plate which serves both as the stand for the motor 14 and as a bearing and this plate is fixed to the jib 12.
- An adequate number of rollers 17 (FIG. 6) are longitudinally spaced along the jib l2 and arranged oppositely in two rows. These rollers 17 engage guide frames 19 having an approximately C-shaped section which are welded to the low sides of the main beam 18 which guides the hoist.
- pulleys 20, 21 are attached to the tip and base of the jib l2 and between these pulleys is stretched an endless wire rope 22 or the like, one part of which is attached at 23to the main beam 18. When these pulleys 20, 21 are properly rotated, the main beam 18 is moved toward or away from the main post 7.
- the hoist 24 is attached to the main beam 18 and can travel freely on the beam 18.
- the jib crane can travel on the rail through an angle of 360 to lift or move a desired load easily.
- the jib crane of this invention needs only a single traveling rail, it takes less space for installation than a conventional one which needs two rails. Moreover, since the wheels 4 of the base frame of the main post contact the u per surface of the rail 1 and the rollers 6, contact the undersl e of the upper part of the'rail 1 and its vertical web, the crane is not likely to get derailed, regardless of the direction from which the load is applied to the crane. Since the base of the jib rotatably supports the upper part, and the lower part, being supported by rollers, can turn along the annular flange of the main post as a guide, the jib can swing very smoothly up to 360.
- a jib crane comprising:
- a single supporting rail comprising a vertical web and a transverse upper part wider than said web;
- a jib having vertically spaced parts pivoted to said main post, carrying a motor and wheels driven by said motor which travel on said annular flange.
- a jib crane as claimed in claim 1 in which said jib comprises a box frame, and an l-beam suspended from said boxframe and longitudinally slidable relative to said box-frame, said beam carrying a hoist suspended from rollers and mounted to travel along said beam.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Jib Cranes (AREA)
Abstract
This invention relates to a jib crane characterized by the fact that the top of the jib is pivoted to the main post, which travels on a single rail and the wheels at the bottom of the jib travel on an annular flange fitted around the main post.
Description
United States Patent Murakami [4 1 Mar. 28, 1972 [54] J IB CRANE [56] References Cited [72] Inventor: Sakae Murakami, 382-2 Matsunaga- UNITED STATES PATENTS machi, Fukuyama, Japan 329,219 /1885 [22] Filed: Apr. 13, 1970 1,551,768 9/1925 1,064,141 6/1913 [21] Appl. No.. 27,520 3,262,400 7,1966 3,391,810 7/1968 Foreign Application Priority Data Primary Examiner-Joseph Wegbreit FCb. 13, 1970 Japan Anomey uolcombe wetheri" & Brisebois [52] US. Cl. ..2l2/l7, 212/55 57 ABSTRACT [51] Int. Cl. B660: 23/04 I 1 58 Field of Search ..212/17, 65, 69, 2s, 61, 55; This invention relates to a j crane characterized y e t that the top of the jib is pivoted to the main post, which travels on a single rail and the wheels at the bottom ofthe jib travel on an annular flange fitted around the main post.
2 Claims, 6 Drawing Figures PATENTEUHARZB 1972 SHEET 1 OF 3 FIG.
PATENTEDmza 1972 3,651,951
' SMEI 2 UF 3 PATENTED MR 2 8 1972 SHEET 3 BF 3 FIGS FIG.6
.Im CRANE SUMMARY OF THE INVENTION A This invention relates to a jib crane. The object of this invention is to provide a jib crane traveling on a single rail and having a load supporting member which may be swung through an angle of 360.
A conventional jib crane travels on two rails and the jib is pivoted to swing freely about the main post. Since it needs two rails, its installation takes up a great deal of space; it cannot swing through 360; and it has a complicated mechanism.
These disadvantages are overcome by my invention, a preferred embodiment of which is illustrated in the accompanying drawings, in which:
FIG. 1 is a side view of a jib crane according to my invention;
FIG. 2 is a sectional view taken along the line II-Il of FIG. 1;
FIG. 3 is a partial longitudinal sectional view of the swingable part of the jib;
FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3;
FIG. 5 is a side view of the traveling part; and
FIG. 6 is a sectional view of the hoist supporting beam.
Referring now to FIG. 1, it will be seen that my crane comprises a single supporting rail 1 and a single guide rail 2 parallel to and above this rail. In the drawing, this guide rail is shown with a C-shaped section.
As seen on FIGS. 1 and 5, a base frame 3 equipped with wheels 4, which roll on the rail 1, and with two rollers 6 which contact both sides of the vertical web of this traveling rail 1 is mounted upon the supporting rail 1. The rollers 6 have a narrow stepped upper portion 6', best seen in FIG. 5. The lateral edges of the upper part of the rail are gripped between the stepped portions 6 and the lower surfaces of this upper part engage the wider portions of the rollers. The wheels 4 of the base frame 3 roll on the rail 1 and are driven by a motor 5 on the frame 3.
The main post 7 stands upright on the base frame 3. From the top end of the main post 7 projects a pin 8, at the top of which is rotatably mounted a roller 9, which engages the groove in the above-mentioned guide rail 2.
As seen in FIGS. 3 and 4, the main post 7 carries an annular flange 10. The upper end of the base of the jib 12 is pivotally mounted by means of the bearing 11 on the pin 8 at the top of the main post. The wheels 13 attached to the lower part of the base of the jib 12 contact the annular flange of the main post. These wheels are mounted on the same shaft as the large gear 15 driven by the motor 14. Therefore, when the motor 14 runs, its motion is transmitted to the wheels, which, guided by the annular flange 10, travel, together with the jib 12, around the main post. The arrangement is more stable, when there are two wheels which contact the annular flange 10. In FIG. 3, 16 is a plate which serves both as the stand for the motor 14 and as a bearing and this plate is fixed to the jib 12. An adequate number of rollers 17 (FIG. 6) are longitudinally spaced along the jib l2 and arranged oppositely in two rows. These rollers 17 engage guide frames 19 having an approximately C-shaped section which are welded to the low sides of the main beam 18 which guides the hoist. Further, pulleys 20, 21 are attached to the tip and base of the jib l2 and between these pulleys is stretched an endless wire rope 22 or the like, one part of which is attached at 23to the main beam 18. When these pulleys 20, 21 are properly rotated, the main beam 18 is moved toward or away from the main post 7. The hoist 24 is attached to the main beam 18 and can travel freely on the beam 18.
Such being the composition of the jib crane of this invention, the jib crane can travel on the rail through an angle of 360 to lift or move a desired load easily.
As the jib crane of this invention needs only a single traveling rail, it takes less space for installation than a conventional one which needs two rails. Moreover, since the wheels 4 of the base frame of the main post contact the u per surface of the rail 1 and the rollers 6, contact the undersl e of the upper part of the'rail 1 and its vertical web, the crane is not likely to get derailed, regardless of the direction from which the load is applied to the crane. Since the base of the jib rotatably supports the upper part, and the lower part, being supported by rollers, can turn along the annular flange of the main post as a guide, the jib can swing very smoothly up to 360.
What is claimed is:
1. A jib crane comprising:
a single supporting rail comprising a vertical web and a transverse upper part wider than said web;
a guide rail parallel to and above said supporting rail;
a base frame supported by wheels which roll on said supporting rail and carrying two rollers which grip opposite sides of said supporting rail, said rollers being stepped to simultaneously contact both said web and the lower surface of said transverse part;
a main post which stands upright on said base frame, and
has an upper end engaging said guiderail;
a transverse annular flange carried by said post; and
a jib having vertically spaced parts pivoted to said main post, carrying a motor and wheels driven by said motor which travel on said annular flange.
2. A jib crane as claimed in claim 1 in which said jib comprises a box frame, and an l-beam suspended from said boxframe and longitudinally slidable relative to said box-frame, said beam carrying a hoist suspended from rollers and mounted to travel along said beam.
Claims (2)
1. A jib crane comprising: a single supporting rail comprising a vertical web and a transverse upper part wider than said web; a guide rail parallel to and above said supporting rail; a base frame supported by wheels which roll on said supporting rail and carrying two rollers which grip opposite sides of said supporting rail, said rollers being stepped to simultaneously contact both said web and the lower surface of said transverse part; a main post which stands upright on said base frame, and has an upper end engaging said guide rail; a transverse annular flange carried by said post; and a jib having vertically spaced parts pivoted to said main post, carrying a motor and wheels driven by said motor which travel on said annular flange.
2. A jib crane as claimed in claim 1 in which said jib comprises a box frame, and an I-beam suspended from said box-frame and longitudinally slidable relative to said box-frame, said beam carrying a hoist suspended from rollers and mounted to travel along said beam.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1419670 | 1970-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3651951A true US3651951A (en) | 1972-03-28 |
Family
ID=11854354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US27520A Expired - Lifetime US3651951A (en) | 1970-02-13 | 1970-04-13 | Jib crane |
Country Status (1)
Country | Link |
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US (1) | US3651951A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3893571A (en) * | 1974-05-28 | 1975-07-08 | Ford Motor Co | Cable flex limiting device |
US3985248A (en) * | 1974-09-25 | 1976-10-12 | Badger Dynamics, Inc. | Telescopic boom assembly |
US20040164040A1 (en) * | 2003-02-25 | 2004-08-26 | Delago Pierre C. | Crane radial support bearing |
US20060283825A1 (en) * | 2005-06-08 | 2006-12-21 | Mhe Technologies, Inc. | Movable girder mounted jib |
CN101565155B (en) * | 2009-05-21 | 2012-06-06 | 同济大学 | Slewing supporting device for hollow wheel of large crane |
US9290362B2 (en) | 2012-12-13 | 2016-03-22 | National Oilwell Varco, L.P. | Remote heave compensation system |
US9463963B2 (en) | 2011-12-30 | 2016-10-11 | National Oilwell Varco, L.P. | Deep water knuckle boom crane |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US329219A (en) * | 1885-10-27 | samuel | ||
US1064141A (en) * | 1912-06-24 | 1913-06-10 | Mathew W Gorham | Single-track street-car. |
US1551768A (en) * | 1922-10-02 | 1925-09-01 | Otis Spencer | Post crane |
US3262400A (en) * | 1964-07-10 | 1966-07-26 | Anglo Transvaal Cons Invest Co | Drives for overhead haulage vehicles |
US3391810A (en) * | 1966-06-20 | 1968-07-09 | Robert G. Letourneau | Excavator machines |
-
1970
- 1970-04-13 US US27520A patent/US3651951A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US329219A (en) * | 1885-10-27 | samuel | ||
US1064141A (en) * | 1912-06-24 | 1913-06-10 | Mathew W Gorham | Single-track street-car. |
US1551768A (en) * | 1922-10-02 | 1925-09-01 | Otis Spencer | Post crane |
US3262400A (en) * | 1964-07-10 | 1966-07-26 | Anglo Transvaal Cons Invest Co | Drives for overhead haulage vehicles |
US3391810A (en) * | 1966-06-20 | 1968-07-09 | Robert G. Letourneau | Excavator machines |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3893571A (en) * | 1974-05-28 | 1975-07-08 | Ford Motor Co | Cable flex limiting device |
US3985248A (en) * | 1974-09-25 | 1976-10-12 | Badger Dynamics, Inc. | Telescopic boom assembly |
US20040164040A1 (en) * | 2003-02-25 | 2004-08-26 | Delago Pierre C. | Crane radial support bearing |
CN100465085C (en) * | 2003-02-25 | 2009-03-04 | 海德勒利夫特埃姆克莱德股份有限公司 | crane radial support bearing |
US7891508B2 (en) * | 2003-02-25 | 2011-02-22 | Hydralift Amclyde, Inc. | Crane radial support bearing |
US20060283825A1 (en) * | 2005-06-08 | 2006-12-21 | Mhe Technologies, Inc. | Movable girder mounted jib |
US7367461B2 (en) | 2005-06-08 | 2008-05-06 | Mhe Technologies, Inc. | Movable girder mounted jib |
CN101565155B (en) * | 2009-05-21 | 2012-06-06 | 同济大学 | Slewing supporting device for hollow wheel of large crane |
US9463963B2 (en) | 2011-12-30 | 2016-10-11 | National Oilwell Varco, L.P. | Deep water knuckle boom crane |
US9290362B2 (en) | 2012-12-13 | 2016-03-22 | National Oilwell Varco, L.P. | Remote heave compensation system |
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