CN214533876U - Column clip - Google Patents

Abstract

The invention relates to a column clamp which is used for connecting an upright post and a cross beam of a full-galvanized goods shelf, the column clamp is L-shaped and is hung with the upright post of the goods shelf, a C-shaped bending piece is welded on the side surface of the L-shaped column clamp, the C-shaped bending piece externally embraces the cross beam, and the cross beam and the column clamp are riveted together. The column clamp meets the structural strength requirement of the full-galvanizing shelf.

Description

Column clip

Technical Field

The invention relates to a shelf device, in particular to a column clamp.

Background

In the traditional solution of the storage industry, in the logistics industry, the shelf connection mode is a loose joint mode, specifically, the upright posts and the cross beams are manufactured in a split mode and installed in a combined mode, and the factors such as manufacturing and transportation cost are considered. The method of the same industry at present is that the parts such as the upright post, the cross beam, the post clamp and the like are produced by adopting the common steel without adopting the surface treatment, then the cross beam and the post clamp are fixed into a whole by adopting the welding mode, and then the welding parts of the upright post, the cross beam and the post clamp are respectively subjected to the surface electrostatic spraying plastic process treatment. This approach has several major problems. 1. The problem of environmental protection, static spraying plastics technology belongs to the strict field of national environmental protection policy, and itself machining does not generally relate to serious environmental pollution, and in order to carry out the surface aftertreatment, often logistics equipment enterprise must set up the spraying plastics link in the mill, has caused the pollution puzzlement. 2. The problem of incomplete surface protection, surface treatment can not be carried out inside the surface spraying plastic treatment crossbeam and inside the stand column, and after long-time use, the structure starts to corrode from the inside, so that the service life is shortened. 3. The problem of recycling difficulty, surface static spraying plastics are inert substances and are difficult to recycle, scrapped logistics equipment causes serious waste of steel, and equipment is required to be added for removing a surface spraying plastics layer for recycling.

In order to solve the technical problems, a storage rack manufactured by fully galvanized coiled materials is developed at present, and the technical starting point is that the coiled materials produced by galvanizing in advance are manufactured by cold processing modes such as bending and the like. However, the adoption of the fully galvanized sheet material also brings some problems to be overcome to the traditional structure and production. The main problem is that it is difficult to connect the structural members using the conventional welding method because the galvanized material is not suitable for welding. In addition, even if the welding process can be overcome, the welding process is not generally used on the galvanized material, so that the damage to the galvanized layer is prevented, and the assumption that secondary surface treatment is not used is lost. Therefore, the structure and the processing technology need to be deeply optimized.

Utility model patent CN211282360U, a riveting structure of shelf beam and post card has done certain optimization to this, and it has adopted the form of the portion of bending on the post card as the connecting piece on crossbeam and the riveted connection basis of post card, can use galvanized coil cold working once only to accomplish the manufacturing, can solve above-mentioned technical problem. However, in production and experiments, the structure is found to be easy to tear at the bent part, the reliability is not high, and the two requirements of full galvanizing and structural stability are also considered on the basis of solving the technical problems.

Disclosure of Invention

In order to solve the technical problems and meet the requirements of full galvanizing and structural stability, the invention provides a column clamp, and the specific technical scheme is as follows.

The utility model provides a column clip for the connection between full zinc-plating goods shelves stand and the crossbeam, the column clip is L shape, with the goods shelves stand articulates, its characterized in that, the side welding of column clip L shape has the C shape piece of bending, the C shape piece of bending is held in the outer cohesion the crossbeam, crossbeam and column clip riveting are in the same place.

Furthermore, the C-shaped bending piece is perpendicular to the surface of the column clamp and protrudes outwards.

Further, the opening of the C-shaped bending piece is arranged on the vertical side.

Furthermore, the upright post and the cross beam are made of galvanized materials, and the post clamp is formed by welding steel and then performing galvanizing treatment.

Further, the riveting is automatic punch riveting.

Furthermore, the column clamp is provided with a clamping jaw which is hung in the hole on the upright column.

Furthermore, pin holes are formed in the column clamp and the upright column, and the safety pin penetrates through the pin holes.

Has the advantages that: the column clamp part is made of common steel, the C-shaped bending piece is welded on the side face of the column clamp, and then the column clamp can entrust an external processing factory to perform zinc plating treatment on the small structural member, so that the column clamp is easy to transport, easy to control and environment-friendly, and meanwhile, the column clamp is an open type part, so that the zinc plating is easily and completely implemented, and no dead angle exists. The riveting process of the C-shaped bending piece and the cross beam is a structure optimized through a large number of experiments, and the rigidity and the fatigue resistance of the structure exceed those of a previous bending part. The structure welded by the C-shaped bending piece is adopted, and the requirements of full galvanization and structural strength are met.

Drawings

FIG. 1 is a schematic view of a post card in an embodiment of the invention;

FIG. 2 is a schematic illustration of a column clamp and cross beam staking in an embodiment of the present invention;

FIG. 3 is a schematic view of the open side of the C-shaped bending member on the post card according to the embodiment of the invention;

FIG. 4 is a schematic view of a connection of a column clamp, a beam and a column according to an embodiment of the present invention;

fig. 5 is maximum bearing and corner data for a static load experiment.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

Example 1

As shown in the figure, the column clamp 1 is used for connecting an upright column 2 and a cross beam 3 of a full-galvanizing shelf, is L-shaped, and is provided with a clamping jaw 5 which is hung in a hole in the upright column 2. Pin holes 6 are formed in the column clamp 1 and the column 2, and a safety pin penetrates through the pin holes 6.

The side face of the L-shaped column clamp is welded with a C-shaped bending piece 7, the C-shaped bending piece 7 embraces the beam 3 at the outer part, and the beam 3 and the column clamp 1 are automatically punched and riveted together by using rivets 4. The C-shaped bending piece 7 is vertical to the surface of the column clamp 1 and protrudes outwards. The opening of the C-shaped bending piece 7 is at the vertical side.

The upright post 2 and the cross beam 3 are made of galvanized coiled materials, and the post clamp 1 is formed by welding steel and then performing galvanizing treatment.

Example 2

And (5) carrying out rigidity and bearing capacity tests. The column clamp is used for carrying out rigidity and bearing capacity test tests on the rivet beam and the upright column joint of the full-galvanized goods shelf, and is carried out in a civil engineering laboratory, and the adopted main instrument equipment comprises: 5 tons of tension and compression sensors, a DH3816 static strain test system and a reaction frame.

Experimental materials the test piece was designed to full-scale dimensions, with the column having a cross-section of Z90 × 70 × 2.0 (fig. 3.1 a) and the beam having a cross-section of Z90 × 70 × 2.0

The section K100 is multiplied by 50 is multiplied by 1.5 (figure 3.1 b), the column clamp is punched by a steel plate with the thickness of 3.5mm, three clamp tongues are punched, and the column clamp is cold-bent

Folded at 90 degrees (fig. 3.1 c), and the material is Q235. All the five types of nodes are in the same batch, and each type of node

The test specimen is designed according to the full-scale size, the upright post adopts the section Z90 multiplied by 70 multiplied by 2.0 (figure 3.1 a), the cross beam adopts the section K100 multiplied by 50 multiplied by 1.5mm, the post card is punched by a steel plate with the thickness of 3.5mm, three clamping tongues are punched, and the test specimen is formed by cold bending and folding the three clamping tongues into 90 degrees (figure 3.1 c), and the materials are Q235 galvanized. All components were in the same batch, and three sets of tests were performed for each type of component.

The difference in structure is, JD1 adopts the structure of this application, and JD2 adopts the structure in utility model patent CN211282360U, and whole node adopts 6 rivet riveting, and JD3 adopts the structure in utility model patent CN211282360U, and whole node adopts 8 rivet riveting.

The mode experiment of adopting stand and crossbeam cantilever, the application of cantilever beam test loading point vertical load is connected with loading device through ring flange and anchor clamps, by displacement control loading, until destroying, data such as record displacement corner. In a static load test, the JD1 failure mode is mainly the breakage of the clamping tongue at the upper end of the column card, and the JD2 and JD3 failure modes are mainly the breakage of the rivets at the upper right side and the upper right side at the joint of the cross beam and the column card. The structural form of JD1 changes the load bearing, and the damage form is different from the original structure, and the synergistic effect is generated. The rivet in the original structure is also proved to be a weak link.

The bending moment-corner curve of the node under the action of static load can reflect the bearing performance of the node, and the ratio of the maximum static load bearing capacity and the corner data obtained by the three types of node tests is shown in fig. 5. Whether the solution in CN211282360U is properly optimized by adding rivets or not, the solution adopted by the invention has significantly higher load bearing capacity than the structure in CN 211282360U. It has also been demonstrated that the load bearing capacity is not significantly improved despite the addition of rivet reinforcement to the original structure.

Example 3

The JD1 from example 2 was tested for fatigue and cyclically loaded on a mechanical fatigue tester. In the JD1 fatigue test, the failure positions of the node under a working load of 2.5T are respectively the rivet fracture of the upper part and the lower part of the side surface of the node and the fracture of the lower clamping tongue of the column clamp, and the rivet fracture of the lower part of the side surface is observed under a working load of 3.0T. All test pieces are suddenly damaged in the test, and the test pieces belong to brittle damage. Under the working load of 2.5T, the minimum value of the loading times is 6.1 ten thousand times when the four test pieces are damaged; and under the working load of 3.0T, the minimum value of the loading times is 0.4 ten thousand times when the two test pieces are damaged. Because the node fatigue test is broken by brittle failure, considering factors such as safe storage and sample discreteness, the fatigue service life of the rivet beam and the column node JD1 is recommended to be the minimum value of the loading times when all test pieces are broken, namely the fatigue service life is recommended to be 6.1 ten thousand times and 4 ten thousand times under the working loads of 2.5T and 3.0T. Can completely meet the production use.

Claims (7)

1. The utility model provides a column clip for the connection between full zinc-plating goods shelves stand and the crossbeam, the column clip is L shape, with the goods shelves stand articulates, its characterized in that, the side welding of column clip L shape has the C shape piece of bending, the C shape piece of bending is held in the outer cohesion the crossbeam, crossbeam and column clip riveting are in the same place.

2. The stud card of claim 1, wherein said C-shaped bend is perpendicular to the surface of the stud card and projects outwardly.

3. The post card of claim 1 wherein the opening of the C-bend is on a vertical side.

4. The post clip of claim 1 wherein said posts and said cross-pieces are made of galvanized material and said post clip is made of steel by welding and then galvanizing.

5. The stud card of claim 1, wherein the rivet is an automatic punch rivet.

6. The post clip of claim 1 wherein said post clip has a locking tab that engages a hole in said post.

7. The post card of claim 1 wherein said post card and said post each have pin holes therethrough, said shear pins extending through said pin holes.

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