GB2399809A - Lifting framework with flat belts as force transmission means - Google Patents
Lifting framework with flat belts as force transmission means Download PDFInfo
- Publication number
- GB2399809A GB2399809A GB0405262A GB0405262A GB2399809A GB 2399809 A GB2399809 A GB 2399809A GB 0405262 A GB0405262 A GB 0405262A GB 0405262 A GB0405262 A GB 0405262A GB 2399809 A GB2399809 A GB 2399809A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lifting
- lifting framework
- flat belt
- load
- post
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 9
- 238000010009 beating Methods 0.000 description 3
- 210000002105 tongue Anatomy 0.000 description 3
- 230000004438 eyesight Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/08—Masts; Guides; Chains
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Escalators And Moving Walkways (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention relates to a lifting framework with at least two rail profiles (SP1, SP2, SP3, SP4) which are laterally spaced apart from one another and with at least one traction mechanism member as the force transmission means to a liftable constructional unit (load cradle LS). In order to provide better viewing conditions, according to the invention, the traction mechanism member is designed as a flat belt (FR) which - viewed in cross-section through the lifting framework - is arranged at right angles to the lateral extent of the lifting framework and directly adjacent to a rail profile (SP1; SP2; SP3; SP4).
Description
ogling framework with flat belts as force transmission means The invention
relates to a lifting framework with at least two rail profiles, which are laterally spaced apart from one another and with at least one traction mechanism member as the force transmission means to a liftable constructional unit.
The liftable constructional unit may be a load lifting device or an extendable post on which a load lifting device is guided.
In lifting frameworks in a standard design, an extending post which is mounted so as to be vertically displaceable in a fixed post is generally actuated by two lifting cylinders arranged on either side of the lifting framework. Lifting chains, generally one respective lifting chain on either side of the lifting framework, are used as force transmission means to a load lifting device (generally a fork cradle) which can be moved vertically on the extending post. Each lifting chain is fastened with one end to the fixed post and with the other end to the load lifting device. Moreover, the lifting chain is guided via a deflection pulley which is fastened to the extending post. When the extending post is lifted, the load lifting device is moved upwardly at a speed which is twice that of the lifting speed of the extending post.
In some known lifting frameworks, the lifting chains are arranged in front of the rail profiles of the lifting framework, while the lifting cylinders are located behind them. This prevents the cylinder tubes, which can be extended from the lifting cylinders and are located laterally next to the rail profiles, from being damaged by the ("beating") lifting chains swinging back and forth. In other arrangements in which the lifting chains are directly adjacent to the lifting cylinders, it is known to equip the lifting chains with so- calied chain protection tongues, to avoid damage to the cylinder tubes and to keep the noises caused by the chains beating as low as possible.
Regardless of the problems resulting from the lifting chains beating back and forth, the lifting chains often hinder the view to the front through the lifting framework and past the lifting framework.
The present invention is based on the object of providing a lifting framework of the type mentioned at the outset with improved viewing conditions. Moreover, the transversal vibrations of the traction mechanism member should also not lead to any disadvantageous effects.
This object is achieved according to the invention in that the traction mechanism member is designed as a flat belt which - viewed in crosssection through the lifting framework- is arranged at right angles to the lateral extent of the lifting framework and directly adjacent to a rail profile.
The concept essential to the invention accordingly consists in using one for more) flat belts for force transmission and arranging these transversely to the lifting framework, in other words at right angles to its lateral extent. . Owing to the small thickness of the flat belt and its arrangement with the flat side at right angles to the lateral extent and close to the lateral rail profile of the lifting framework, there is practically no hindering of the view.
Moreover, owing to the shape of the flat belt and its material composition (rubber-elastic sheathing of steel cores), damage to the components arranged in the region of the transversal vibrations of the flat belt is avoided.
The "chain clattering" which is known in the lifting frameworks of the state of the art and is often considered acoustically unpleasant, is also dispensed with.
It is self-evident that for reasons of symmetry, a mode of construction is preferred in which a respective flat belt is arranged on either side of the lifting framework. Nonetheless, it is, in principle, also possible, with expedient design of the guides of the lifting framework, to use only one flat belt which is then arranged on one of the sides of the lifting framework.
According to a first advantageous configuration of the invention, the flat belt is arranged on the outside of the lateral rail profile. The field of vision between the rail profiles of the lifting framework is therefore not at all limited by the flat belt(s).
A configuration of the invention which is no less favourable, provides that the flat belt is arranged between the inside of the lateral rail profile and guide means of the liftable constructional unit. This variant not only has the advantage of not causing any hindrance to the view, but also leads to an accommodation of the flat belt which is relatively protected from external influences.
The invention can be used in principle in all types of lifting frameworks, in which one or more traction mechanism members are used. In an embodiment of the invention with a so-called standard lifting framework, the liftable constructional unit is designed as a load lifting device which can be displaced, in a vertically movable manner on an extending post which can be extended from a fixed post, the fixed post and the extending post each having two rail profiles which are laterally displaced apart from one another and, in each case, a flat belt is provided as the force transmission means directly adjacent to the lateral rail profiles of the lifting framework and is guided by a deflection pulley mounted in the region of the upper end of the extending post and is fastened with one end to the fixed post or a component connected thereto and is fastened with the other end to the load lifting device.
The extending posts can also be lifted by flat belts in lifting frameworks with a plurality of extending posts. In this instance, it is possible, in each case, to arrange the flat belts between the inside of an outer rail profile and the support rollers of the respective extending post.
It is proposed, in a development of the invention, that a second deflection pulley coaxial to the deflection pulley of the flat belt should be provided which is adjacent to the deflection pulley of the flat belt and is guided via the at least one hydraulic hose.
At least one hydraulic consuming load, for example a hydraulic lateral slide, which is fastened to the load lifting device and can be vertically displaced together therewith on the lifting framework, is supplied by the hydraulic hose(s). This arrangement has the advantage that even the hydraulic hoses required in certain applications and opening into the region of the load lifting device only insignificantly hinder the view.
According to another configuration, at least one hydraulic hose is guided via the deflection pulley of the flat belt. This arrangement is also favourable with regard to a free field of vision. In this instance, a separate second deflection pulley for the hydraulic hoses can be dispensed with.
Further advantages and details of the invention are described in more detail with the aid of the embodiment shown schematically in the figures, in which: Fig. 1 shows the main components of a lifting framework of the state of the art; Fig. 2a shows a partial view of a lifting framework according to the invention in the direction of travel; Fig. 2b shows a section through the view of Fig. 2a along line 11b-llb; Fig. 3a shows a partial view of a variant of the lifting framework according to the invention; Fig. 3b shows a section through the view according to Fig. 3a along the line Illb-lilb; and Fig. 4 shows a further variant of the lifting framework according to the invention in a sectional view.
The lifting framework of the state of the art shown in Fig. 1 is also designated a "standard lifting framework" and has a fixed post SM, of which the two rail profiles SP1 and SP2 which are laterally spaced apart from one another, each have an inwardly directed C-section. An extending post AM mounted in the fixed post SM, the rail profiles SP3 and SP4 of which each have an l-section, can be moved vertically by means of at least one hydraulic cylinder HZ.
Two lifting chains fastened in the upper region of the fixed post SM and each arranged on either side of the lifting framework, of which only one lifting chain LK is shown in the figure, are each guided via a deflection pulley UR fastened to the extending post AM and fastened to a load cradle LS designed as a fork carrier, which is guided so as to be vertically movable on the extending post AM. When the extending post AM moves vertically with respect to the feed post SM, the load cradle LS therefore moves at twice the lifting/lowering speed.
Support rollers TR are arranged both between the fixed post SM and the extending post AM and also between the extending post AM and the load cradle LS. A respective support roller TR (only the support roller TR fastened to the rail profile SP2 is shown) is located at the upper end of the fixed post SM on each rail profile SP1 and SP2 and a respective support roller TR (the support roller TR of the rail profile SP3 is shown) , is located at the lower end of the extending post AM on each rail profile SP3 and SP4.
The load cradle LS in the present example is provided on each side, in other words on both load cradle cheeks LW, with three respective support rollers TR, two upper support rollers TR (shown in the figure) and one lower support roller TR (not shown). A filler piece FS by means of which pinching and shearing risks are avoided during the replunging of the load carriage cheeks LW which have been upwardly slightly moved out of the rail profiles SP3 and SP4 of the extending post AM is located vertically between the two upper support rollers TR.
The support rollers TR are each fastened on bearing journals LZ which are welded onto the rail profiles SP1 and SP2 of the fixed post, the rail profiles SP3 and SP4 of the extending post AM and to the load cradle cheeks LW. In order to compensate tolerances in the profile guides of the rail profiles in the axial direction, plain washers US can be arranged on the bearing journals LZ.
A respective compensating element AE is provided on the unloaded side of the support roller TR, so the lower support rollers TR of the extending post AM running in the C-sections of the fixed post SM, do not require a larger diameter than the upper support rollers TR of the fixed post SM running in the l-sections of the extending post AM.
As can be seen from Fig. 2a, which shows a section of the rail profiles SP1 and SP3 from the view from the rear through the lifting framework, the lifting chains according to the invention are replaced by flat belts FR. These are arranged at right angles to the lateral extent of the lifting framework (see also Fig. 2b).
In this instance, in the design according to Figs. 2a and 2b, the flat belt FR arranged in the region of the rail profiles SP1 and SP3 are located on the outside of the rail profile SP1 of the fixed post SM. The flat belt FR is guided via a deflection roller UR which is fastened to the upper end of the rail profile SP3 of the extending post AM on a welded-on tongue L. The axis of rotation OR of the deflection pulley UR is also at right angles to the lateral extent of the lifting framework.
The flat belt FR is fastened by one end to an extension arm AL connected to the rail profile SP1, while the other end is connected to the load cradle LS in a manner not shown in Figs. 2a to 3b.
In one configuration of the invention, it is possible for a second deflection pulley URH to be coaxially adjacent to the deflection pulley UR, via which deflection roller URH, hydraulic hoses HS of a hydraulic consuming load fastened to the load cradle LS are guided. The second deflection pulley URH and the hydraulic hoses HS are shown by a dot-dash line in Fig. 2b.
In the embodiment of the invention according to Figs. 3a and 3b, the flat belt FR is arranged between the inside of the rail profile SP3 of the extending post AM and the support rollers TR fastened to the load cradle cheeks LW of the load cradle LS. In this instance, the tongue L which carries the deflection pulley UR, is fastened in a space-saving manner to the upper end of the rail profile SP3.
In the embodiment according to Fig. 4, hydraulic hoses HS which are associated with a plurality of hydraulic consuming loads, are, alternatively or in addition to the configuration according to Fig. 2b, guided via the deflection pulley UR of the flat belt FR, namely along the outside of the flat belt FR.
Claims (6)
- Claims 1. A lifting framework with at least two rail profiles which arelaterally spaced apart from one another and with at least one traction mechanism member as the force transmission means to a liftable constructional unit, characterised in that the traction mechanism member is designed as a flat belt which - viewed in cross-section through the lifting framework - is arranged at right angles to the lateral extent of the lifting framework and directly adjacent to a rail profile.
- 2. A lifting framework according to claim 1, characterised in that the flat belt is arranged on the outside of the lateral rail profile.
- 3. A lifting framework according to claim 1, characterized in that the flat belt is arranged between the inside of the lateral rail profile and guide means (support rollers) of the liftable constructional unit (load cradle).
- 4. A lifting framework according to any one of claims 1 to 3, characterised in that the liftable constructional unit is designed as a load lifting device (load cradle) which can be moved vertically on extending post which is mounted in a fixed post, the fixed post and the extending post each having two rail profiles which are laterally spaced apart from one another and, directly adjacent to the lateral rail profiles of the lifting framework, a respective flat belt is provided as the force transmission means to the load lifting device (load cradle) which is guided via a deflection pulley mounted in the region of the upper end of the extending post and is fastened with one end to the fixed post or a component (tongue) connected thereto and is fastened with the other end to the load lifting device (load cradle). #
- 5. A lifting framework according to any one of claims 1 to 4.characterised in that a second deflection pulley which is coaxial to the deflection pulley of the flat belt is provided which is adjacent to the deflection pulley of the flat belt and is guided via the at least one hydraulic hose.
- 6. A lifting framework according to any one of claims 1 to 5, characterised in that at least one hydraulic hose is guided via the deflection pulley of the flat belt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10314089 | 2003-03-28 | ||
| DE10354093A DE10354093A1 (en) | 2003-03-28 | 2003-11-19 | Mast with flat belt as a power transmission medium |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0405262D0 GB0405262D0 (en) | 2004-04-21 |
| GB2399809A true GB2399809A (en) | 2004-09-29 |
| GB2399809B GB2399809B (en) | 2006-04-12 |
Family
ID=32178298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0405262A Expired - Fee Related GB2399809B (en) | 2003-03-28 | 2004-03-09 | Lifting framework with flat belts as force transmission means |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2852943A1 (en) |
| GB (1) | GB2399809B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600081455A1 (en) * | 2016-08-03 | 2018-02-03 | Angelo Ceresa | UPRIGHT POST FOR ELEVATOR TROLLEY WITH BELTS AND PIPES IN SUPPORT OF THE SAME |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3231047A (en) * | 1963-11-29 | 1966-01-25 | Yale & Towne Inc | Lift truck |
| DE2717168A1 (en) * | 1977-04-19 | 1978-10-26 | Jungheinrich Kg | Fork lift truck mast assembly - has open construction fixed and travelling frames with chain drive and hydraulic cylinder actuators |
| US4865516A (en) * | 1987-05-13 | 1989-09-12 | Focke & Co., Gmbh | Rotatable elevating carrier for a palletizer |
| JP2000128311A (en) * | 1998-10-26 | 2000-05-09 | Toyota Autom Loom Works Ltd | Stacker crane and its mast |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE613667A (en) * | 1961-02-08 | 1962-05-29 | Burtonwood Engineering Company | Multi-purpose wash set. |
| FR1376014A (en) * | 1963-10-24 | 1964-10-23 | New device allowing the transformation of a rapid rotary movement into a slow translational movement, and its application in particular to lifting equipment | |
| WO1990000152A1 (en) * | 1988-06-29 | 1990-01-11 | Helpher Ab | A goods lifting and lowering arrangement |
| DE29702783U1 (en) * | 1997-02-18 | 1997-06-19 | Richter, Rolf, 24558 Henstedt-Ulzburg | Attachment of lifting device with load belt winch for hand pallet truck |
-
2004
- 2004-03-09 GB GB0405262A patent/GB2399809B/en not_active Expired - Fee Related
- 2004-03-25 FR FR0403069A patent/FR2852943A1/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3231047A (en) * | 1963-11-29 | 1966-01-25 | Yale & Towne Inc | Lift truck |
| DE2717168A1 (en) * | 1977-04-19 | 1978-10-26 | Jungheinrich Kg | Fork lift truck mast assembly - has open construction fixed and travelling frames with chain drive and hydraulic cylinder actuators |
| US4865516A (en) * | 1987-05-13 | 1989-09-12 | Focke & Co., Gmbh | Rotatable elevating carrier for a palletizer |
| JP2000128311A (en) * | 1998-10-26 | 2000-05-09 | Toyota Autom Loom Works Ltd | Stacker crane and its mast |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600081455A1 (en) * | 2016-08-03 | 2018-02-03 | Angelo Ceresa | UPRIGHT POST FOR ELEVATOR TROLLEY WITH BELTS AND PIPES IN SUPPORT OF THE SAME |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2852943A1 (en) | 2004-10-01 |
| GB2399809B (en) | 2006-04-12 |
| GB0405262D0 (en) | 2004-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20110309 |