DE4236022A1

DE4236022A1 - Pallet foot for heavy duty pallets - has two half frames absorbing different forces to take up heavy loads with lighter weight structure

Info

Publication number: DE4236022A1
Application number: DE19924236022
Authority: DE
Inventors: Reinhold Dipl Ing Klowski
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-24
Filing date: 1992-10-24
Publication date: 1994-04-28

Abstract

The pallet foot comprises a first half frame (2) for absorbing the compressive force from the tension moment. There is a second half frame (1) for absorbing the reaction force, and a connecting web (3) which takes the compressive force from the first half frame as a cross force and directs it to the second half frame (1). The second half frame (1) comprises the tension rod (5) which is connected resistant to bending with the upper collar arm (4) and lower collar arm (6). The second half frame (2) comprises the pressure rod (8) connected bend-resistant to the upper collar arm (7) and lower collar arm (9). The upper collar arm comprises a belt, web and clamping element (24). USE/ADVANTAGE - Heavy duty pallets for vertical shelving systems. High loads can be absorbed through the closed frame formed by the pallet foot, pallet plate and pallet skid.

Description

Die Erfindung bezieht sich auf einen Palettenfuß aus Metall oder Kunststoff, der bei Flachpaletten das Palettendeck mit der Kufe zu einem biegesteifen, geschlossenen Rahmen zusammenfügt.The invention relates to a pallet base made of metal or plastic Flat pallets the pallet deck with the skid to a rigid, closed Frame.

So ist es möglich, daß Palettendecks aus Holzabfällen oder Kunststoff-Recyclaten, die nur ca. 10% des E-Modules von Holz besitzen, zu fertigen, die den DIN-Normen für Schwerlastpaletten genügen und damit in Hochregalen eingesetzt werden können. Damit hat der geschlossene Rahmen - trotz niedrigen E-Modules der eingesetzten Materialien gegenüber Holz - die gleichgute Biegesteifigkeit, wie z. B. die normalerweise eingesetzte EUR-Palette, da diese genagelt oder geschraubt sich wie ein Träger auf 2 Stützen verhält, also die 4-6fache Durchbiegung gegenüber einem geschlos senen Rahmen hat.So it is possible that pallet decks from wood waste or Plastic recyclates, which only have about 10% of the E-module of wood, to manufacture meet the DIN standards for heavy-duty pallets and are therefore used in high racks can be. So the closed frame has - despite the low E-modules materials used compared to wood - the equally good bending stiffness, such as B. the EUR pallet normally used, as this is nailed or screwed like a Beam behaves on 2 supports, i.e. 4-6 times the deflection compared to a closed one has its frame.

Der Palettenfuß setzt sich aus 4 Funktionsteilen zusammen:
1. Einem Halbrahmen (2) zur Aufnahme der Druckkraft FD aus dem Einspannmoment ME.
2. Einem Halbrahmen (1) zur Aufnahme der Reaktionskraft FZ also eine Zugkraft.
3. Ein Verbindungssteg (3), der die Druckkraft aus Halbrahmen (2) als Querkraft über nimmt und an Halbrahmen (1) weiterleitet.The pallet foot consists of 4 functional parts:
1. A half frame ( 2 ) for receiving the compressive force FD from the clamping torque ME.
2. A half frame ( 1 ) for absorbing the reaction force FZ is a pulling force.
3. A connecting web ( 3 ) which takes over the compressive force from the half frame ( 2 ) as a transverse force and forwards it to the half frame ( 1 ).

Das so gekoppelte Kräftepaar FD, FZ bildet mit dem Hebel d3 so das Reaktionsmo ment auf das Einspannmoment ME also:The pair of forces FD, FZ thus coupled forms the reaction mo with the lever d3 ment on the clamping torque ME:

ME = FD_*d3ME = FD _* d3

4. Das Moment FD_*d3 findet seinerseits seine Reaktion in dem Moment ZG_*h. Die Zugkraft ZG wird von den Elementen (18, 20) und (16, 24) über Reibschluß und Klemmkraft von der Kufe aufgenommen.
Es ist also4. The moment FD _* d3 in turn finds its reaction in the moment ZG _* h. The tensile force ZG is absorbed by the elements ( 18 , 20 ) and ( 16 , 24 ) via friction and clamping force from the runner.
So it is

ZG_*h = FD_*d3 = ME3.ZG _* h = FD _* d3 = ME3.

Vergleicht man die Momentenhebel (Fig. 8, 9, 20) d1, d2, d3, so ist bei vorgeschriebe ner Öffnungsbreite b Fig. (1, 2, 3) die in Fig. 10 gezeigte Konstruktion die optimale, da d3 < d2 < d1 ist. Somit wird das Einspannmoment (Fig. 2, 3)If one compares the torque levers ( Fig. 8, 9, 20) d1, d2, d3, the construction shown in Fig. 10 is the optimal one given prescribed opening width b Fig. (1, 2, 3), since d3 <d2 < is d1. Thus the clamping torque ( Fig. 2, 3)

ME3 < ME2 < ME1.ME3 <ME2 <ME1.

drawings

Fig. 1 Biegelinien bei freiem Auflager (FFR) und bei geschlossenem Rahmen (FE). Fig. 1 bending lines with free support (FFR) and with the frame closed (FE).

Fig. 2 Einspannmoment ME1 z. B. bei Verwendung von Hohlnieten. Fig. 2 clamping torque ME1 z. B. when using rivets.

Fig. 3 stark reduziertes Einspannmoment ME3 bei Verwendung des Palettenfußes. Fig. 3 greatly reduced clamping torque ME3 when using the pallet foot.

Fig. 4 Palettenfuß mit Halbrahmen (1) und (2) sowie Querkraftsteg (3) und Klemmelementen. Fig. 4 pallet base with half frame ( 1 ) and ( 2 ) and transverse force bar ( 3 ) and clamping elements.

Fig. 5 Schnitt X-X durch (1) (2) (3), Schnitt Y-Y durch (1), Fig. 5 through section XX (1) (2) (3), cut YY by (1),

Fig. 6 Schnitt Z-Z durch (2), Fig. 6 Section ZZ by (2),

Fig. 7 gestanzter und gebohrter Palettenfuß vor der Umformung. Fig. 7 punched and drilled pallet foot before forming.

Fig. 8 Palettenfuß mit Öffnung der Halbrahmen zueinander. Fig. 8 pallet base with opening of the half frame to each other.

Fig. 9 Palettenfuß mit Öffnung der Halbrahmen zur Palettenmitte. Fig. 9 pallet base with opening of the half frame to the center of the pallet.

Fig. 10 wie Fig. 9 mit (3) als Querkraftsteg. Fig. 10 as Fig. 9 with ( 3 ) as a transverse force web.

BezugszeichenlisteReference list

1 Halbrahmen
2 Halbrahmen
3 Querkraftsteg
4 oberer Kragarm
5 Zugstab
6 unterer Kragarm
7 oberer Kragarm
8 Druckstab
9 unterer Kragarm
10 Gurt
11 Steg
12 Zuggurt
13 Gurt
14 Steg
15 Gurt
16 Steg
17 Druckgurt
18 Steg
19 Druckflansch
20 Klemmflansch
21 Aussteifung
22 Bohrung
23 Bohrung
24 Klemmflansch
25 Gurt 1 half frame
2 half frames
3 shear bar
4 upper cantilever
5 tension rod
6 lower cantilever
7 upper cantilever
8 pressure rod
9 lower cantilever
10 belt
11 bridge
12 tension belt
13 belt
14 bridge
15 belt
16 bridge
17 pressure belt
18 bridge
19 pressure flange
20 clamping flange
21 stiffening
22 hole
23 hole
24 clamping flange
25 belt

Claims

1. Pallet base made of plastic or metal, especially for heavy-duty pallets for use in high racks, which consists of the half frame ( 1 ) for absorbing the tensile force FZ and half frame ( 2 ) for absorbing the compressive force FD. Thus, the clamping torque ME is absorbed via lever d by the pair of forces FZ, FD. The half frame ( 1 ) consists of the tension rod ( 5 ) which is rigid with the upper cantilever arm ( 4 ) and the lower cantilever arm ( 6 ).

The half frame ( 2 ) consists of a pressure rod ( 8 ) which is rigidly connected to the upper cantilever arm ( 7 ) and the lower cantilever arm ( 9 ).

The upper cantilever arm ( 7 ) consists of the belt ( 15 ), the web ( 16 ) and the Klemmele element ( 24 ) to absorb the pressure force DR via friction and clamping force from the pallet deck.

The lower cantilever arm ( 9 ) consists of the belt ( 25 ), the web ( 18 ) and the Klemmele element ( 20 ) in order to absorb the reaction force, that is the tensile force ZG, from the skid via frictional engagement and clamping force.

The pair of forces DR, ZG with the lever h is the reaction moment to the on ME clamping moment for the production of the rigid, closed frame.

2. Pallet base according to claim 1, characterized in that the half frames ( 1 ) and ( 2 ) with their open sides to each other and are connected by welding, gluing or riveting.

3. Pallet foot according to claim 1, characterized in that the half frames ( 1 ) and ( 2 ) are open towards the center of the pallet, the tension rod ( 5 ) of the half frame ( 1 ) with the push rod ( 8 ) of the half frame ( 2 ) by welding , Adhesive or rivets are connected.

4. Pallet base according to claim 3, characterized in that the half frames ( 1 ) and ( 2 ) are connected by at least one transverse force web ( 3 ) by welding, gluing or riveting.