DE102010035617A1 - Stake pocket for use in loading area for securing load in commercial vehicle, has shells joined together by groove-spring connection, where dimension of spring of connection is larger than dimension of groove of connection - Google Patents

Abstract

The pocket has two welded components (1, 2) formed as shells, where the shells are joined together by a groove-spring connection. Dimension of a spring (5) of the connection is larger than dimension of a groove (4) of the connection. Tolerance range resulting from a difference of minimum dimension and maximum dimension of the groove is smaller than tolerance range of dimension of the pocket, where the dimension of the pocket produces a form-fit connection. The minimum and the maximum dimensions of the groove are less than maximum dimension and minimum dimension of the spring, respectively. An independent claim is also included for a method for manufacturing a stake pocket.

Description

The invention relates to a Rungentasche, which consists of at least two welded components in the form of shells, and a method for producing such a Rungentasche. Pony bags of the type mentioned are in particular used in the commercial vehicle sector.

Systems for securing cargo in the commercial vehicle sector, in which the cargo area has openings in which load securing elements, in particular stanchions, can be used, are known in many designs. So shows DE 20 2004 009 044 a device for securing the load against slipping. In this case, the loading surface in a grid arranged openings, also called Rungentaschen, on, can be used in the holding elements. The openings consist of downwardly at least partially closed pipe sections, which are firmly connected to the underloading the cargo carriers, preferably welded. The outer dimensions of the stanchions are slightly less than the inner dimensions of the pipe sections, so that the stanchions can easily slide into and out of the stanchion pockets.

The disadvantage here is that pipe profiles compared to rolled sheets usually have a higher base price per kilogram with otherwise the same steel quality. This is particularly true for seamlessly drawn tubes that have no ridge inside and therefore particularly well suited for use as a stanchion pocket and thus for the insertion of stanchions. As far as the existing Rung bag from a piece of pipe subsequently edited, for example, must be provided with an additional hole for receiving a Runge security, incur considerable additional costs, since this is at least one additional step is required.

Also known and widely used in the field are stanchion bags in which welded assemblies made from sheet metal blanks are used instead of tube sections. As a rule, initially blanks of two mirror-symmetrical individual parts are produced, these then bent C-shaped and then welded together, so that the finished stanchion pocket has the same dimensions as the stanchion pocket made of a pipe section. Such stanchion bags are used in particular for stanchions with square cross-section.

Although such Rungentaschen are cost-effective in terms of their material price and with modern manufacturing equipment such as laser cutting centers and CNC Abkantern very economical to manufacture, but the two items must be welded together to form a tubular part. This can easily lead to inaccuracies, since the two individual parts, which are placed against each other before welding, can move relative to each other. Also, burr edges in the area of the abutting contact surfaces can prevent the exact positioning that is required to comply with the tolerances of the welding assembly, which generally amount to a few tenths of a millimeter. Also deformations due to the welding temperatures have to be considered.

The invention has for its object to offer a Rungentasche and a method with which on the one hand, the compliance of the predetermined tolerance dimensions of the Rungentasche can be guaranteed and on the other hand allow a cost-effective production.

This object is achieved by waiving the use of expensive profile tubes, the stake pocket is made of a two or possibly other components existing sheet metal construction, in which the components are joined together by means of a tongue and groove connection.

Preferably, the components are formed as half-shells, wherein one of the half-shells with at least one spring and the other with a complementary, groove-like recess, in the following groove, is provided. The tolerances of the individual parts are designed so narrow that even with the most unfavorable, just within the tolerance range actual dimensions of the individual parts in particular the tolerance of the specified in the welding assembly internal pipe dimension, in abutting contact surfaces of the two components, in any case.

Preferably, the spring is configured with bevels at its corner regions, wherein the groove preferably has recesses in its corner regions, so that the assembled half shells do not touch each other in the corner regions of the tongue and groove and especially the smallest burr edges in these regions have no disturbing effects on compliance the tolerance of the Rungentasche can have.

In an advantageous embodiment, at least one groove and one spring each are arranged on a pillbox half shell such that the groove is on one cheek of the component and the spring on the other. This makes it possible to assemble two identical pillbox half shells to a stanchion pocket by the half-shells are connected by 180 ° rotated against each other. It thus accounts for manufacturing and storage costs for the management of two different items. Derived from this, other grooves and springs can be used.

The requirements for dimensional accuracy during welding are relatively high. However, this results in a simplification of the distance then when tongue and groove of the stanchion pocket have a limited to the bottom of the groove contact surface, which does not exceed 33% of the height of the stanchion pocket.

Embodiments have also proven advantageous in which tongue and groove in plan view have a rectangular, trapezoidal or spade shape, wherein the contact surface are formed by a flat or curved contact surface.

It is also advantageous if the tolerances of spring width and groove width are coordinated so that a displacement of the components in the direction perpendicular to Rung pocket bottom only in a range is possible, which is smaller than the tolerance range of optionally contained in the components, each other in relation standing holes, which are usually arranged in the weld assembly on a common center line.

The invention also relates to a method for producing a stanchion pocket, which is explained in the context of the drawing description.

The invention will be explained in more detail with reference to an embodiment illustrative drawing.

The figures of the drawing show:

1 : two identical components of a stake pocket in perspective and exploded view;

2 : the front view of the juxtaposed components;

3 : the side view of the two juxtaposed components;

4 : A plan view of the juxtaposed components.

1 shows a stake pocket 3 according to the invention in exploded view, wherein the two components, namely two equal half-shells 1 and 2 can be seen. After assembling the half-shells 1 and 2 results in a configuration of the stanchion pocket 3 according to the 2 to 4 , The half-shells 1 and 2 have in cross-section about a C-shape, consisting of two cheeks 15 and 16 as well as a back wall 17 composed. The one free edge 15.1 the cheek 15 has two springs 5 on. Correspondingly at the same height are compatible grooves 4 on the other free edge 16.1 the cheek 16 intended. Both half shells 1 and 2 are sheet metal parts.

In the construction of the stake pocket half shells 1 and 2 , which are preferably identical, at least equal, the cut dimensions of the settlement in the range of groove 4 and spring 5 so dimensioned that the observance of the tolerance range of the dimensions M3 and M3 'of the finished stanchion pocket contained in a corresponding welding group drawing is ensured.

In addition, the corner areas of the springs 5 with bevels 8th and the corner areas of the grooves 4 with recesses 9 provided so that when pushing together the half shells 1 and 2 Contact and contact surfaces 12 and 13 from groove 4 and spring 5 in the groove bottom.

Advantageously, embodiments have proven in which tongue and groove in plan view have a rectangular, trapezoidal or spade shape, wherein the groove bottom is formed by a flat or curved contact surface.

The flat developments of the half-shells 1 and 2 are made in their shape from a steel sheet having a sufficient thickness, preferably by a cutting laser, in compliance with the predetermined cutting tolerances by the laser automatically performs a cut along the previously entered into the computer of the laser cutting machine contour lines in a known manner. An analog cutting technique with a waterjet cutter is used when cutting aluminum sheet.

The cut-to-size parts are shaped three-dimensionally with a folding machine in such a way as to give half-shell half-shells 1 and 2 arise. Both half shells have at least one spring 4 and at least one groove 5 as shown in the figure.

The two half shells 1 and 2 Be including the tongue and groove connection 7 pushed into each other until the contact surfaces 12 . 13 the feather 5 and the groove 4 touch each other or rest on each other. The dimension M1 of the spring is greater than the dimension M2 of the groove, so that in fully pushed together state only the contact surfaces 12 and 13 from groove 4 and spring 5 touch and between the two components 1 and 2 otherwise edge regions a gap 6 remains.

The width M4 of the spring 5 is chosen so that the sum of the widths M4 all on the cheek 15 contained springs 5 less than 33% of the height H of the stanchion pocket 3 accounts.

Furthermore, the width M4 of the spring 5 and the width M5 of the groove 4 so that their tolerance field forms a clearance fit. Here is the size of the tolerance field of groove 4 and spring 5 so narrow that after joining the half-shells 1 and 2 from the bore semicircles 11 resulting holes 10 within the hole for this 10 provided tolerance range of the finished stanchion pocket 3 to be maintained bore tolerance. The opposite holes 10 lie on a common alignment line and serve to accommodate security bolts, not shown.

After joining, you get one from the half shells 1 and 2 existing rat pocket 3 , The thus in a defined manner to each other positioned half shells 1 and 2 are welded together by means of a welding device, wherein the weld preferably from the outside to the Rungentasche 3 is stored to the later insertion of stanchions (not shown) in the stanchion pocket 3 not to be a hindrance.

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 202004009044 [0002]

Claims (10)

Rung bag made of at least two welded components ( 1 . 2 ) in the form of trays, characterized in that the trays ( 1 . 2 ) by means of a tongue and groove connection ( 7 ) are joined together. Rung pocket according to claim 1, characterized in that by means of a tongue and groove connection ( 7 ), the dimension (M1) of the spring ( 5 ) is greater than the dimension (M2) of the groove ( 4 ), wherein the tolerance range resulting from the difference between the spring maximum dimension minus the minimum groove dimension and the spring minimum dimension minus the maximum groove dimension is smaller than the tolerance range of the measure of the welded rat pocket that establishes the positive connection. Rung bag according to claim 1 or 2, characterized in that the spring ( 5 ) at their corners via chamfers ( 8th ). Rung pocket according to one of claims 1 to 3, characterized in that the groove ( 4 ) in their corner areas via recesses ( 9 ). Rung pocket according to one of claims 1 to 4, characterized in that the half shells ( 1 . 2 ) via at least one groove ( 4 ) as well as at least one spring ( 5 ) feature. Rung pocket according to claim 1 or 5, characterized in that the stanchion pocket ( 3 ) from two equal half-shells ( 1 . 2 ) is designed, which half shells are rotated by 180 ° against each other connected to each other. Rung pocket according to one of the preceding claims, characterized in that groove ( 4 ) and spring ( 5 ) the stanchion pocket ( 3 ) each one on the groove bottom limiting contact surface ( 12 ; 13 ), which is 33% of the height (H) of the stanchion pocket ( 3 ) does not exceed. Rung pocket according to one of the preceding claims, characterized in that groove ( 4 ) and spring ( 5 ) in plan view have a rectangular or spade shape, wherein the contact surface is formed by a flat or curved contact surface. Method for producing a stanchion pocket ( 3 ) consisting of at least two welded half-shells ( 1 . 2 ) in the form of shells, characterized in that the stanchion pocket ( 3 ) is produced using the following method steps: • cutting the half-shells ( 1 . 2 ) in its unwound form of metallic materials, wherein the one half-shell ( 2 ) at least one groove ( 4 ) and the other half shell ( 1 ) at least one with the groove ( 4 ) compatible spring ( 5 ), wherein the blank of groove ( 4 ) and spring ( 5 ) each have a contact surface ( 13 ; 12 ) for a contact between tongue and groove, • three-dimensional deformation of the cut parts to stake pocket shells ( 1 and 2 ); • joining the shells ( 1 and 2 ) in a positive connection, wherein the contact surface ( 12 ) the feather ( 5 ) the contact surface ( 13 ) of the groove ( 4 ), and moreover a difference of spring maximum dimension minus groove minimum dimension and spring minimum dimension minus groove maximum dimension includes a tolerance range which is smaller than the tolerance range of the positive connection establishing dimension of the from the shells ( 1 . 2 ) existing welding assembly; • welding the half shells ( 1 . 2 ) to a stake pocket ( 3 ). Method according to claim 9, characterized in that during the assembly of the half shells ( 1 . 2 ) a positive connection only in the region of the groove ( 4 ) and the spring ( 5 ) and, moreover, after the positive assembly, a gap ( 6 ) remains between the half-shells.

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