DE102013008242A1 - Traction pull with lifting device - Google Patents

Abstract

Tugger train element (1) with a chassis (2) that is open at least in sections on one of the two long sides, into which a mobile transport aid (10) can be inserted on the long side that is open in sections, and which has a longitudinal spar (3) that is parallel to the central longitudinal axis of the Routing Zugements (1) is arranged, and at least three crossbars (4a, 4b, 4c), which are spaced apart from each other in the vertical direction with the longitudinal spar (3) and thus a front (2a), a middle (2b) and one form rear chassis section (2c), the chassis (2) having two or more wheels (5) and at least one lifting device (8) for lifting a transport aid (10), the crossbars (4a, 4b, 4c) in the region of their long sides each have at least one guide bar (9), the guide bars (9) being arranged in such a way that the top of the bar provided for supporting the transport aid (10) n form a slope in the direction of the open long side of the chassis (2), and the cross bars (4a, 4b, 4c) each have at least one front lifting element (8a) in the region of the end section which is opposite the longitudinal bar (3).

Description

The present invention relates to a tugger train with a chassis that is open at least in sections on one of the two longitudinal sides, into which a mobile transport aid can be moved on the partially open longitudinal side, and which has a longitudinal spar which is arranged parallel to the central longitudinal axis of the tiller and at least three Transverse spars, which are spaced from each other in the respective vertical direction with the longitudinal spar and thus form a front, a middle and a rear chassis section, wherein the chassis has two or more wheels and at least one lifting device for lifting a transport aid, so that in sections open longitudinal side of the chassis, a mobile transport aid in the tugger train, which is then raised, can be retracted.

In industrial manufacturing and in the field of modern warehousing, mobile trolleys, rack trolleys, or pallet trolleys, collectively referred to as mobile transport aids in the context of the present invention, serve for portion-wise provision and provision of individual parts.

For efficient movement of mobile transport aids over long distances within a production facility, multiple route train elements are connected to one another similar to a freight train. Routing train elements are also referred to elsewhere as trailer for trailer trains.

Routing train elements with a so-called "E-frame" as a supporting frame, or as a chassis, are already off DE 603 00 189 T2 and from DE 10 2007 022 525 A1 known. The term "E-frame" describes the structure of the chassis of these tugger train elements, whose essential components in the supervision of the structure of the letter "E" recall. An "e-frame chassis" is at least partially open on the longitudinal side opposite the longitudinal spar, so that the mobile transport aids can be moved into the chassis.

The middle chassis section, which is arranged on the middle cross member of the E-frame, has a chassis which comprises two or more wheels. In the case of a single-axis tugger train, the wheel axles of all the wheels are aligned, so that the driving behavior of the E-frame chassis corresponds to that of a single-axle trailer.

To build a train of multiple tugger trains, the front chassis section of each route bullet additionally has a tiller lying in the longitudinal axis of the tiller element with a terminal annular opening, while the rear chassis section has a corresponding hitch for receiving the tiller opening of a subsequent tiller. The drawbar of the first route guidance element is connected to a tractor.

• – einen Längsholm, der parallel zur mittigen Längsachse des Routenzugelements angeordnet ist, und mindestens
• – drei Querholme, die voneinander beabstandet und in jeweils senkrechter Richtung mit dem Längsholm verbunden sind und so einen vorderen, einen mittleren und einen hinteren Fahrgestellabschnitt bilden, mit zwei Rädern im mittleren Fahrgestellabschnitt sowie
• – eine Deichsel im Bereich des vorderen Fahrgestellabschnitts, und
• – eine Anhängevorrichtung im Bereich des hinteren Fahrgestellabschnitts.

The essential components of a known from the prior art uniaxial trailer with a chassis with E-frame, which serves as a tugger train element, thus include

• - A longitudinal spar, which is arranged parallel to the central longitudinal axis of the Routenzugelements, and at least
• - Three transverse bars, which are spaced from each other and connected in each vertical direction with the longitudinal spar and thus form a front, a middle and a rear chassis section, with two wheels in the middle chassis section and
• - A drawbar in the area of the front chassis section, and
• - A hitch in the region of the rear chassis section.

In the context of a tugger train, tugger train elements allow the simultaneous movement of a plurality of mobile transport aids by only one person. For heavily loaded transport aids, the use of tugger trains is already sensible for moving only a few transport aids.

Are known route tensile elements without lifting device or with lifting device. Routing members without lifting device are for example in the documents DE 603 00189 T2 . FR 2 888 200 and DE 20 2013 100 729 U1 disclosed. In a tugger with E-frame chassis, which has no lifting device, the wheeled transport aid inserted from the side into the tugger is not lifted and rolls on its own wheels during the movement in the tugger train. In this case, the respective route train element thus only serves to carry the transport aid.

It is disadvantageous that the rollers of the transport aid are exposed to high wear. Due to the large number of transport aids used in industrial manufacturing and warehousing, the protection of the rollers attached to the transport aids represents a considerable cost advantage DE 603 00189 T2 and FR 2 888 200 known tugger train elements the disadvantage that the entrained and heavily loaded transport aids break out when passing through tight curves from the curved lane.

To facilitate the transport of heavily loaded transport aids and to protect the rollers, castors or wheels of mobile transport aids, tugger trains were equipped with a lifting device.

A uniaxial tugger train trailer (tow trailer trailer) is from the document DE 10 2008 060 962 A1 , or the subsequent European patent application EP 2 161 182 A2 , known. In this tugger a wheeled transport aids (inner car) can be retracted, the inner carriage is supported in the transport condition of the trailer train with complete relief of the inside car side castors weight transferring the trailer frame and on this on the trailer side guide rollers, including the entire trailer frame as a unit by a between this and the axis of rotation of the trailer-side guide rollers arranged trailer-mounted lifting device between a lowered for receiving the inner carriage standby position and a raised together with this transport position is height adjustable. In EP 2 311 673 A2 becomes a further development of the route guidance EP 2 161 182 A2 disclosed. The further development is characterized in that the lifting device has a hydraulic pressure generating pump with rotary drive, wherein the rotary drive is coupled via a transmission with at least one of the wheels rolling on the ground of the E-frame chassis. At the DE 20 2013 100 729 U1 Known tugger train the transport aids is moved by muscle power on obliquely arranged taxiways and thereby excavated. Additional lifting elements to facilitate the lifting process are in DE 20 2013 100 729 U1 not provided.

Against this background, the object of the invention is to provide a chassis with a lifting device for a tugger train, or in the provision of a route guidance, which allows easier lifting and lowering of a mobile transport aid.

The object is achieved by a route train element according to claim 1.

• – die Querholme im Bereich ihrer Längsseiten jeweils mindestens eine Führungsleiste aufweisen, wobei die Führungsleisten jeweils so angeordnet sind, dass die zur Auflage des Transporthilfsmittels vorgesehene Leistenoberseiten in Richtung der offenen Längsseite des Fahrgestells ein Gefälle bilden, und
• – die Querholme jeweils im Bereich des Endabschnitts, der dem Längsholm gegenüberliegt, mindestens ein vorderes Hubelement aufweisen.

The route tensile element according to the invention is characterized in that

• - The transverse bars in the region of their longitudinal sides each have at least one guide bar, wherein the guide rails are each arranged so that the provided for supporting the transport aid strip tops in the direction of the open longitudinal side of the chassis form a slope, and
• - The transverse bars each have in the region of the end portion, which is opposite to the longitudinal spar, at least one front lifting element.

The core idea of the invention is the provision of a device for halving the load to be lifted in each case during loading of the route control element or during unloading of the route control element by the combination of obliquely arranged guide rails with lifting elements. The lifting elements are each arranged so that the respective lifting elements, the transport aid always only on one side, d. H. Never lift completely during the respective lifting process.

• – Große Plattform; die Führungsrollen außerhalb der Plattform werden über die am vorderen Fahrgestellabschnitt (d. h. am vorderen Querholm) angeordnete Führungsleiste und die am hinteren Fahrgestellabschnitt (d. h. am hinteren Querholm) angeordnete Führungsleiste geführt
• – Mittlere Plattform; die Führungsrollen innerhalb der Plattform, werden über die beiden am mittleren Fahrgestellabschnitt (d. h. am mittleren Querholm) angeordneten Führungsleisten geführt
• – kleinere Plattform(en); die Führungsrollen der ersten Plattform (außerhalb der Plattform liegen), werden durch die am vorderen Fahrgestellabschnitt (d. h. am vorderen Querholm) angeordnete Führungsleiste und die am gegenüberliegenden mittleren Fahrgestellabschnitt (d. h. am mittleren Querholm) angeordnete Führungsleiste geführt und die die Führungsrollen der zweiten Plattform (ebenfalls außerhalb der Plattform liegend), werden durch die am hinteren Fahrgestellabschnitt (d. h. am hinteren Querholm) angeordnete Führungsleiste und die am gegenüberliegenden mittleren Fahrgestellabschnitt (d. h. am mittleren Querholm) angeordnete Führungsleiste geführt.

When using the route guidance element (E-frames) according to the invention, the handling of transport aids (platforms) of different sizes is possible:

• - Great platform; the guide rollers outside the platform are guided over the guide rail arranged on the front chassis section (ie on the front cross member) and the guide rail arranged on the rear chassis section (ie on the rear transverse member)
• - middle platform; the guide rollers within the platform are guided over the two guide rails arranged on the middle chassis section (ie on the middle crossbar)
• - smaller platform (s); the guide rollers of the first platform (lying outside the platform) are guided by the guide frame arranged on the front chassis section (ie on the front cross member) and the guide rail arranged on the opposite central chassis section (ie on the central cross member) and which guide rollers of the second platform (also lying outside the platform) are guided by the guide frame arranged on the rear chassis section (ie on the rear cross member) and the guide strip arranged on the opposite central chassis section (ie on the central transverse member).

In a preferred embodiment, the transverse bars in the region of their respective end sections, which are connected to the longitudinal spar, in each case have at least one rear lifting element in addition to the front, inlet-side lifting element. The rear lifting elements are used in each case when unloading the transport aids.

In a particularly preferred embodiment, the front lifting element and the rear lifting element, which both at one of the Transverse beams are arranged, coupled by a rotatably mounted rocker. The effect of the coupling of a front lifting element with a rear lifting element and the associated advantages are associated with 1 explained.

In a further preferred embodiment, the guide rails in the portion which is positioned next to the rear lifting element, each having a depression. The recess is dimensioned such that it can receive a guide roller, which is arranged on a retracted in the tugger transport aid, and thus can secure against rolling back of the transport aid.

In a very particularly preferred embodiment, the rear lifting elements can be raised by means of a foot pedal. After lifting, the top components of the lifting element protrude beyond the top of the adjacent guide rail. As a result, the transport aid, whose guide rollers stored during transport in the wells, again lifted by muscle power from the wells, and prepared for removal from the chassis.

In a further development of this very particularly preferred embodiment, the front lifting elements can be lowered by means of a foot pedal, so that the upper-side components of the lifting element in the lowered state do not project beyond the upper side of the guide bar in this area.

Due to the respective coupling of the front lifting elements with the rear lifting elements by a rocker, the lowering of the front lifting elements by means of actuation of the foot pedal and the raising of the rear lifting elements is carried out synchronously.

In a further preferred embodiment of the route guidance element, a drawbar is arranged on the front chassis section and a towing device on the rear chassis section. It is envisaged that the drawbar and the hitch each centrally, d. H. lying on the longitudinal axis of the chassis, are arranged. In addition, however, an embodiment is conceivable in which the arrangement of the drawbar and the hitch, starting from the longitudinal axis of the chassis in the direction of the longitudinal spar of the chassis, is shifted.

It is also within the scope of the invention that the drive of the lifting elements, by means of one or more compression springs, wherein the compression springs are arranged so that they are compressible by means of a force-actuated by muscle tensioning device.

The use of a chassis in one of the aforementioned embodiments makes it possible to provide a plurality of tugger train elements and to provide a plurality of tugger trains.

EXAMPLES

Show it:

1 Route train element in perspective view

2 Guide bar with front lifting element

3 Construction and arrangement of the foot pedal

1 shows the route member in perspective.

The chassis 2 of the route guideline 1 has the structure of the letter "E" in the supervision. The chassis 2 divided into the front chassis section 2a , in the middle chassis section 2 B and in the rear chassis section 2c ,

The front chassis section 2a is with a drawbar 6 connected and the rear chassis section 2c with a hitch 7 connected. By concatenating multiple route items 1 with the help of the drawbar 6 and the hitch 7 will be the movement of a variety of tugger trains 1 possible in a network.

In the chassis shown 2 For example, transport aids (not shown) can be retracted in three different sizes. In the between front chassis section 2a and the middle chassis section 2 B as well as between the middle chassis section 2 B and the rear chassis section 2c can be retracted at the same time two transport aids (not shown) of the same size. The transport aids each have in the front region on the left and right arranged guide rollers. These guide rollers are at the beginning of the insertion of the transport aid in the chassis 2 above the guide rails 9a positioned.

Because the guide rails 9 arranged so that they are in the direction of the open longitudinal side of the chassis 2 form a slope, is when inserting the transport aid in the chassis 2 only the front portion of the transport tool is raised. The front wheels of the transport aid are relieved during the rear wheels of the transport aid are still loaded.

After complete insertion of the transport aid in the chassis 2 , ie after the openings provided on the transport aid openings with the longitudinal spar 3 of the chassis 2 arranged attacks 3a have come form-fitting contact, are guide rollers of the transport aid in the wells 9a , At the same time are the fasteners of the guide rollers of the transport aid (or the axes of the guide rollers) on top of the rear lifting elements 8b on.

Following this, the transport aid can be completely excavated by muscle power, namely by a tilting movement, so that all wheels of the transport aid no longer touch the ground. The tilting movement causes the rear lifting elements 8b be completely lowered and the transport tool in the wells 9a secured against rolling back.

The seesaw 8c locked in motion above the provided by the mechanics "dead center" selbstätig.

In the example shown, each of the rear lifting elements 8b each by a rotatably mounted rocker 8c with a front lifting element 8a coupled. As a result, the above-mentioned tilting movement causes lowering of the rear lift device 8b a lifting of the front lifting elements 8a , At the same time, the foot pedal moves 8d up. In this position, the foot pedal for later release is ready for removal of the transport tool.

The advantage of the device is that when inserting the transport aid only half of the weight through the guide rails 9 must be recorded. This reduces the frictional resistance and the effort required to insert the transport tool. The second half of the weight is through the front lifting elements 8a raised as a result of the tilting movement of the transport aid.

As a result, the transport aid 10 be rolled out of the chassis again.

Unlocking (ie removing a transport tool from the truck) works as follows:
By pressing the foot pedal 8d (downward movement) the rocker mechanism is released from its fixation via the dead center.

In this case, the rotatably arranged rocker moves 8c each together with the components of the front lifting element 8a down while the components of each rear lifting elements 8b lift up to 20 mm and the guide rollers of the transport aid from the wells 9a to the level of the top of the guide rails 9 Lift.

As a result, they get on the opposite side of the transport aid, ie in the area of the front lifting elements 8a , arranged wheels, due to the simultaneous lowering of the front lifting elements 8a again ground contact and take the proportionate load. Thereafter, the transport aids from the chassis 2 to be pulled.

The foot pedal locking element 8c , which is connected to the foot pedals 8d is needed to use transport aids with a medium or large size platform. The foot pedal locking element 8c causes a synchronous actuation of the two adjacent foot pedals 8d , The synchronous actuation of the two adjacent foot pedals 8d is required to have a medium size transport tool and a large size transport tool with the same chassis 2 to be able to lift. The Fußpedalarretierungselement causes the simultaneous triggering of the two in the middle chassis section 2 B arranged rocking mechanisms.

In principle, the coupled lifting devices 8a . 8b , except by muscle power, are driven in different ways. In addition to the pneumatic, hydraulic or electric drive is as a further alternative, a manual-mechanical drive of the lifting devices 8a . 8b conceivable by means of a plurality of compression spring.

2 shows the front (entry side) section of the guide rail 9 with the front lifting element 8a in the side view. The interaction of the rocker is made clear 8c with a component of the front lifting element 8a , It also becomes clear that with the lifting of the front lifting element 8a also the foot pedal 8d raising. The adjacent foot pedal 8d was already pressed down in the example shown, with the associated front lifting element 8a is lowered.

3 shows the structure of the foot pedal 8d and illustrates the interaction rocker 8c with the connecting element 8f through which the seesaw 8c with the foot pedal 8d is in operative contact.

LIST OF REFERENCE NUMBERS

1

Routenzugelement

2

Chassis (E-frame chassis)

2a

front chassis section

2 B

middle chassis section

2c

rear chassis section

3

Longitudinal spar of the chassis

3a

Stop at the longitudinal spar

4

Cross bars of the chassis

4a

front cross member

4b

middle crossbar

4c

rear cross member

5

Wheels of the route guidance element

6

shaft

7

hitch

8th

lifting device

8a

front (entrance-side) lifting element

8b

rear (longitudinal spar side) lifting element

8c

seesaw

8d

pedal

8e

Fußpedalarretierungselement

8f

Connecting elements between foot pedal and rocker

9

guide rail

9a

Depression in the guide rail

10

transport equipment

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 60300189 T2 [0004, 0009, 0010]
• DE 102007022525 A1 [0004]
• FR 2888200 [0009, 0010]
• DE 202013100729 U1 [0009, 0012, 0012]
• DE 102008060962 A1 [0012]
• EP 2161182 A2 [0012, 0012]
• EP 2311673 A2 [0012]

Claims (9)

Route pull ( 1 ) with a chassis that is at least partially open on one of the two longitudinal sides ( 2 ), in which on the sectionally open longitudinal side a mobile transport aid ( 10 ), and which - a longitudinal beam ( 3 ) parallel to the central longitudinal axis of the route guidance element ( 1 ), and at least - three transverse spars ( 4a . 4b . 4c ), which are spaced from each other in each vertical direction with the longitudinal spar ( 3 ) and which are such a front ( 2a ), a middle ( 2 B ) and a rear chassis section ( 2c ), the chassis ( 2 ) - two or more wheels ( 5 ) and - at least one lifting device ( 8th ) for lifting a transport aid ( 10 ), characterized in that - the transverse beams ( 4a . 4b . 4c ) in the region of their longitudinal sides in each case at least one guide strip ( 9 ), wherein the guide rails ( 9 ) are each arranged so that the support for the transport ( 10 ) provided strip tops in the direction of the open longitudinal side of the chassis ( 2 ) form a slope, and - the transverse spars ( 4a . 4b . 4c ) each in the region of the end portion of the longitudinal spar ( 3 ) is opposite, at least one front lifting element ( 8a ) exhibit. Route pull ( 1 ) according to claim 1, characterized in that the transverse beams ( 4a . 4b . 4c ) in the region of the end portion which is connected to the longitudinal spar ( 3 ), in addition in each case at least one rear lifting element ( 8b ) exhibit. Route pull ( 1 ) according to claim 2, characterized in that the front lifting element ( 8a ) and the rear lifting element ( 8b ), both at one of the transverse spars ( 4a . 4b . 4c ) are arranged by a rotatably mounted rocker ( 8c ) are coupled. Route pull ( 1 ) according to one of claims 1 to 3, characterized in that the guide rails ( 9 ) in the section adjacent to the rear lifting element ( 8b ), one depression each ( 9a ), wherein the depression ( 9a ) is dimensioned so that it has a leading role in one in the route member ( 1 ) retracted transport aids ( 10 ) is arranged, can accommodate. Route pull ( 1 ) according to claim 4, characterized in that the rear lifting elements ( 8b ) by means of a foot pedal ( 8d ) are liftable, wherein the upper-side components of the lifting element ( 8b ) in the raised state over the top of the guide strip ( 9 ) protrude in this area. Route pull ( 1 ) according to one of claims 1 to 5, characterized in that the front lifting elements ( 8a ) by means of a foot pedal ( 8d ) are lowered, wherein the upper-side components of the lifting element ( 8a ) in the lowered state not over the top of the guide bar ( 9 ) protrude in this area. Route pull ( 1 ) according to one of claims 1 to 6, characterized in that on the longitudinal axis of the chassis ( 2 ) lying on the front chassis section ( 2a ) a drawbar ( 6 ) and on the rear chassis section ( 2c ) a hitch ( 7 ) is arranged. Route pull ( 1 ) according to one of claims 1 to 7, characterized in that the drive of the lifting elements ( 8a . 8b ), by means of one or more compression springs, wherein the compression springs are arranged so that they can be compressed by means of a muscle-operated tensioning device. Route train consisting of several route train elements ( 1 ), characterized in that at least one of the route train elements ( 1 ) a route member ( 1 ) according to one of claims 1 to 8.

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