IL27971A - Lifting and tilting device for the emptying of containers - Google Patents

Description

PATENT ATTORNEYS · □ Ό 1 Q EJ 'DTllJ IV PATENTS AND DESIGNS ORDINANCE SPECIFICATION lifting and tilting device for the emptying of containers o»Va»a npnnV neon nein^ ipnn ELISABETH ZOLLER and HELGA SOHOLZ-ZOLLER, both citizens of Germaay, both of Wormeer Straaae 50/60, La benheiin Rhein, Germany do hereby declare the nature of this inyention and in what manner the same is to be performed, to particularly described and ascertained in and by t following statement :— (Che invention relates to a lifting and tilting device for the emptying o containers, particularly of garbage containers into a collecting receptacle* More specificall the invention relates to a lif ing and tilting device of the kind in which a lifting and tilting carriage (designated as "oarrlage") bearing the container to be emptied, is provided with upper and lower pairs of runner elements, more specifically of rollers and runs along two guide rails placed at a distance from each other and substantially fi¾ed with respect to the wall of the collecting receptacle* As distinct from lifting and tilting devices, in which the liftin carriage is guided o a swivel arm (for example, according to Swiss Patent 286,395) and also as distinct from those lifting and tilting devioes in which the uppe . portion of the guide rails is designed as a swivel arm or swivel frame (Austrian Patentl81,561) it is necessary in the Φe o lifting and tilting device specified above, that the lower runner elements e.g. rollers of the carriage leave the guideway in or at the guide rails to permit the tilting operation, and return into this guide way at the end of tho tilting movement when returning into t eir initial position (see German Patents 655,879 and 867,222). This type of guiding the lifting and tilting device requires, as a special feature, a smooth and shock-free transition from the lifting to the tilting movement and a smooth and shook-free return movement of the lower runner elements into the guide rails* In order to achieve this it has been proposed to provide at the upper end of the guide rails a looking device or the upper runner element of the carriage (se© ©orman latent 655*879) or an aroh-shaped guideway for the upper runner element of the carriage (German latent 867*222). Finally it has also been proposed to avoid thes disadvantages by a corresponding regulatio of the ©peed of the actuating mee a sm.^German Patent .1,266,085)· All these measures might be more or less , successfu in the case of li ing and tilting devices provided with a rope drive. However, they ar© completely inefficient in the case of lifting and tilting devices of the kind specified in which there is provided a lifting and tilting cylinder which lifts the carriage along the guide means and tilts it at the end of these guide mesas (French Patent 953,674). In devices of this kind the carriage had, hitherto, to be brought into th fina lifting position by a Jerking movement, in order to make it start the tilting movement* On the other hand, as a result of the small angle of operation of the lifting and tilting cylinder on the carriage the cylinder was not capable to absorb the shock of the backward tilting movement of the carriage acting in a substantially vertical direction to the direction of movement o the piston* It is therefor© an object o theinvention to provide a li ting and tilting device with a lif ing and tilting cylinder and with substantially fixed guide rails working of the lifting and tilting device should he simple* free of disturbances and should work securely even in the case of accumulation o dirt* This is obtained, acoording to the invention, in that those portions cf the guide rail provided for the. lower runner elements of the lifting and tilting carriage have at their uppe face an inclined end portion over waloh the runner elements pass during the last part of the lifting movement* Xnjthis manner the tilting movement of the carriage is started before the end of the lifting movement, owing to the action o the lifting and tilting cylinder and of the lower runner elements of the oarriage running along the inclined portion, so that the transition between the lifting movement and the tilting movement is smooth and to a great extent without shock©. On the other hand the lowe runner elements of the oarriage encounter the inclined portion of the guide rails at the end of the backward tilting movement* !his causes the component movement of the backward tilting movement to be decomposed under the aotion of the lower runner element and the inclined portion of the guide rail into pulse components, one of which is in principle opposed to the direction of action of the lifting and tilting cylinder and may thus be absorbed by the latter* In this manner a largely shock-free transition from the backward tiltin movement into the lowering movement is obtained.

It Is especially advantageous according to the ends ewingable in the font plate of the collecting reeeptaole by moans of plugs coaxial with the tilting axis of the front plat® and are attached in their lowe part by means of at least ono axially releasable holding element to the rear wall of tho collecting receptacle.

In this manner the guide rails as such are swingable within the limits given by th© axial flexibility of the holding element with respect to the wall of ho collecting receptacle. The shook-or Impulse components created by the running of the lower runner element of the carriage on the inclined portion of the guide rails and upon their sudden contact* at the end of the back-tilting movement, with these inclined portions, and whioh ore transverse to the direction of action o the lifting cylinder* are absorbed and dampened by these releasable holding elementa. , She transmission of shocks from the lifting and tilting cylinder to the wall of the containers can be avoided completely only if the lif ing and tilting cylinder is swingably attached at the lower end of the guide veils by means of a transverse bolt attached to both guide^rails.

In oas'e of an elastic attachment of the guide rail to the wall of the oolleoting receptacle, this type of support for the lifting and tilting cylinder has the additional advantage that the trajeOtory of forOes has not to be guided over such flexible holding elements.

A further advantageous eature of the invention is obtained if the li ting snd tilting cylinder is a known telescopic cylinder in whioh the ou sliding of the first member is coordinated in such a manner with the lifting end- end portion of the guide rails when the first member of the telesoopio cylinder has been completel slid out. · By this matching of the portion© of the guide rails with the members of the telescoplo cylinder an ^specially smooth and seoure absorbtion of the baokward tilting movement of the carriage containing the emptied g rbage bin* upon hitting of the lower running elements of the carriage on the upper portion of the inclined end portion of the guide rails is obtained* This permits to use the critical transition in the development of foroes between the brake effeot of,the telesoopio cylinder from the first outeliding member to the out second/sliding member, or from the second to the first member* which leads to an especially shock-free* noiseless and wear avoiding manner of work of the device upon transition rom the backward tilting movement into the lowering movement* Other features and advantages of the invention will become apparent from the ollowing description of an embodiment of the invention with ref rence to the accompanying drawings*' in which: Fig* 1 is a side view of the initial position of a lifting and tilting device according to the invention with garbage bin attached thereto* Fig* 2 shows the device according to Fig* 1 in the lifting end-position* Fig. 3 represen s the devioe according to Figs. 1 and 2 n the tiltdd in position.

Fig. 4 is a back vie of the devioe aooordlng to Figs. 1 to 3. - 7 - 27971/2, The embodiment shown in these figures relates to a lifting and tilting device for the emptying of garbage bins into a garbage collecting receptacle. At the rear wall 1 of a garbage collecting receptacle there is provided an emptyin device comprising an emptying casing 2 and a front plate 3, swingably attached to a horizontal axis 4» so as to be swung into the emptying casing 2· The li ting and tilting device according to the invention comprises two guide rails 5 juxtaposed apart with a lateral distance, which are substantially fixedly attached with respect to the rear wall 1 of the garbage collecting receptacle, and a lifting and tilting carriage 6 provided with known catching hooks 7 and a counter-bearing plate 0 for the garbage bin 9· For lifting and tilting the carriage 6 there is provided a lifting and tilting cylinder 10.

The guide rails 5 consist in principle of three guide elements, namely an uppe portion 5a, in which the upper guide rollers 11 of the carriage 6 slide whilst completely enclosed, a lower part 5b which forms with its rearward surfaces an open guideway for the lower rollers 12 of the carriage 6, and a middle portion 5c inclined or offset frontwards and downwards and whioh forms at its rear end an inclined portion 5d over which the lower runner rollers 12 of the carriage 6 run during the last part of the lifting movement. Each guide rail 5 is made of a single piece with its portions 5a,.5b and 5c. The - 8 - 27971/2 inclined or bent portion 5c ia designed in such a manner that the guideway formed at the lower portion 5b is flush with the guideway formed at the upper part 5a. The distance between the upper guide rollers 11 and the lower guide rollers 12 of the carriage 6 corresponds to the maximum lifting height which the carriage is capable of achieving. Thi3 distance is in addition approximately equal or slightly greater than the guideway formed in the upper part 5a of the guid rail 5 but not smaller than this guideway. Each guide rail is provided at the upper end with lateral lugs 13 by which it is inserted into the front plate 3· For this purpose the fron plate is out at the lower central portion and provided with receiving bores for the lugs 13 in order to maintain these lugs 13 in the front plate 3 coaxial with the tilting axis 4.

At the upper end of the guide rails 5 and between these two guide rails there is inserted a distance piede 14, so that the lugs 13 are retained in the receiving bores of the front plate 3. A transverse bolt 15 is attached to the lower end of the guide rails 5 and serves forthe swingable attachment of the telescopic cylinder 10.

At the same time the guide rails 5 are interconnected by means of the distance piece 14 and the lugs 13 to form a stable guide frame of the carriage 6, which frame is swingably attached to the front plate 3· In the lower part of this guide frame formed by the guide rails 5 there is provided an elastic holdin element* for example, a rubber-metal piece 16, attached to the rear-side of the frame and to the back wall 1 of the collecting receptacle* Shis holding element 16 releasable in its axial direction permits a limited, and swinging movement of the guide frame formed by the guide rails» with respect to the back wall 1 of the collecting receptacle, the shooks produced by this movement being absorbed in both directions.

She telescopio cylinder 10 is swingably attached with its piston rod 17 to the eye IS of the carriage 6 and swingably attached with its lower oyllnder end to the bolt 15· She pressure medium is brought to and evacuated from the lifting and tilting cylinder 10 by means of an axial bore in the bolt 15 and a further bore in the front wall of the lifting cylinder.

For absorbing the shock at the end of the lifting movement the distance piece 14 may be provided with an elastic shock-absorbing coating 20. It is further recommenced to design the upper end 21 of the guide rail 5 in such a manner that in the lifting end position the upper runner elements 11 of the carriage 6 have a coaxial position with the tilting axis 4 of the front plate 3» so that the carriage 6 and the garbage bin 9 attached thereto swing coaxial to the front plate 3. She front plate 3 is then tilted inwardly by the action of the lifting and tilting cylinde 10» against the action of a returning devioe, for example, a spring acted holder 22, and after disconnection of the lifting and tiltin cylinder 10 the plate 3 is returned into its starting position by the spring acted holder 22.

She device according to the invention works in the After the garbage bin.9 is plaoed at the rear of the li ting and tilting device, the lif ing and tilting cylinder 10 is actuated with the pressure medium by a known regulating device. Thereby the lifting and tilting cylinder 10 disposed substantially parallel or even with a small negative angle with respeot to the guideways 5a and 5b of the guide rails 5> displaces the lifting and tilting carriage 6 upwards, so that the latter catches with its catching hooks 7 the° garbage bin 9 and lifts it. This lifting movement is continued in a straight line upwards until the lower guide rollers 12 reach the inclined guideway 5d in the middle portion of the guide rails 5» so that under the action of this inclined guideway 5d and of the lifting and tilting cylinder 10 the carriage 6 with the garbage bin 9 start making a tilting movement* At this moment the angle of operation of the lifting and tilting cylinder 10 on the carriage 6 Is continuously increased. The lifting movement, together with the tilting movement started in its upper portion ends when the carriage 6 is pressed in its upper end position against the buffer coating 20, in which position the upper runner rollers 11 lie coaxial to the tilting axis 4 of the front plate 3. the lower runner rollers 12 of the carriage 6 rest In this case on the upper end of the inclined guide surface 3d, but preferably still on this inclined guide surface. She first member 10b of the telescopic cylinder 10 is i this case substantially completely slid out from the cylinder casing 10a. Since the lifting and tilting cylinder 10 rests with its lower end on the guide rail 5» the shock with whioh the carriage 6 i es ed a in t uf r During the last part of the simultaneous lifting and tilting movement, the angle of operation of the lifting cylinde 10 has been ino eased by GO much that a furthe pressure effect of the lifting and tilting cylinder 10 causes a further tiltin movement of the carriage 6, until the tilted-ln position shown in Fig. 3 is reached. By a corresponding selection of the dimension of the inclined portion 3d, and by selecting thejiimeneions of the lifting and tilting cylinde 10, the transition to the tilting movement proper can be obtained without appreciable pressure increase in the interior of the lifting and tilting cylinder 10 or else, with a previously established increase of pressure in the interior of the cylinder.

For backwards tilting and lowering of the carriage 6 with the garbage bin 9 the liftin and tilting cylinder 10 Is disconnected, so that the front plate with the garbage bin and the carriage 6 is swung back by the aotion of the spring* aoted holding element 22 into its starting position and at the same time the pressure medium is expelled from the liftin and tilting cylinder 10. The baokwards tilting movement is continued by the aotion of the weight of the carriage 6 and of the emptied garbage bin 9f until the carriage 6 bears with its lower runner rollers 12 on the inclined guideway 5d. When the runner rollers 12 bear on the inclined guideway 5d the component of movement i.e. the moment of rotation of the backwards tilting movement is decomposed by the inclined portion 5d into two components, of which the main component is parallel to the line of actio of the lifting and tiltin component perpendicular to the former is absorbed by the buffering holding element 16. The lower runner rollers 12 of the carriage 6 then run along the inclined guide surface 5d and then along the lover guideway 5b which is flush with the upper guideway 5a, until the carriage has returned to its lower resting position and the garbag bin 9 can be placed on the ground.

In order to protect *e upper guideway 5 from dirt it is reoommendable to oover this guideway along the profile of the guide rail 5# as shown in Fig. 5» so that only a small slot for the axis of the upper runner rollers 11 is left -13- 27971/2

Claims (12)

1. A lifting and. tilting device for the emptying of containers, particularly of garbage bine into a collecting receptacle, comprising a lifting and tilting carriage, adapted to bear the container to be emptied and provided with an upper and lower pair of runner elements, more specifically rollers, two guide rails for the rollers of the carriage epaced apart and substantially fixed with respect to the wall of the collecting receptacle, and a lifting and tilting cylinder for lifting the carriage along a guideway formed by the guide raile and tilting it at the end of the guideway, wherein the part of each guide rail engaged by a lower runner element of the carriage has at its upper part an inclined end portion over which the runner element passes during the last part of the lifting movement.

2. A lifting and tilting device according to Claim 1, wherein the upper ends of the guide rails are pivotally retained in the front plate of the collecting receptacle by means of lugs coaxial with the tilting axis of the front plate and are in attached/their lower part to the rear wall of the collecting receptacle by means of at least one axially resilient holding element·

3. A lifting and tilting device according to Claim 1 or 2, wherein the lifting and tilting cylinder is swingably mounted at the lower end of the guide rails by means of a transverse bolt attached to both guide rails. -14- 27971/2

4. » A lifting and tilting device according to any of Claims 1 to 3, wherein the lifting and tilting cylinder ie a known telescopic cylinder of which the first outslidlng member is adjusted in such a manner to the lifting end position of the carriage, that the lower runner elements of the carriage still rest on the upper »ora of the inclined end portion of the guide rails when the first member of the telescopic cylinder has been fully extended.

5. A lifting and tilting device according to any of Claims 1 to 4, wherein the guide rails are designed in euoh a manner that at the end of the lifting movement the upper runner rollers of the carriage lie coaxial to the tilting axis of the front plate of the collecting receptacle,

6. A lifting and tilting device according to an of Claims 1 to 5, wherein the parts of the guide rails,except the Inclined portions, which form a guideway for the lower runner elements of the carriage are substantially flush with the parts of the guide rails which form a guideway for the upper runner elements of the carriage.

7. A lifting and tilting device according to any of Claims each 1 to 6, wherein the guide rails consist/of a single piece and are designed in their upper parts as an almost closed guideway for the upper runner elements, and at the rear faces of their lower parts and their inclined middle portions as an open guideway for the lower runner elements of the carriage.

8. A lifting and tilting device according to Claim 7» wherein the guideways for the upper runner elements of the carriage are «15«* 27971/2 \

9. A lifting and tilting device according to any of Claims 1 to 8» wherein a shock absorber for limiting the lifting movement of the carriage is provided between the upper ends of the guide rails.

10. A lifting and tilting device according to any of Claims 1 to 9 I wherein the length of the guideway for the upper runner elements ie slightly smaller or equal to the dietance between the upper and the lower runner elements of the carriage .

11. A lifting and tilting device according to any of Claime 1 to 10, wherein for the secure guiding of the lower runner elements of the carriage in their guideway, the lifting and tilting cylinder is placed with its direction of movement parallel or at a email negative angle with reepect to this guide-way.

12. A lifting and tilting device for the emptying of containers, particularly of garbage blna into a collecting receptacle, eubetantially e deecribed herein with refcrenee to the accompanying drawings. For the Applicants RTNERS HDied