CN211623286U - Foldable support column structure with locking function - Google Patents

Abstract

A foldable support structure with locking function comprises a support and an outer support; the outer pillar is hinged with the pillar through a connecting piece on the pillar; a support is arranged below the connecting piece on the pillar, a locking cavity and a strip-shaped notch are arranged on the support, a locking block is arranged in the locking cavity, and the locking block is rotationally connected with the support; a connecting rod is arranged between the supporting column and the outer supporting column, a positioning bolt is arranged at one end of the connecting rod and is positioned in the elongated notch, the side part of the locking block is pressed on the positioning bolt in a folding state, the positioning bolt slides towards the locking end on the side part of the locking block along with the opening of the outer supporting column, when the outer supporting column is opened to a maximum opening angle relative to the supporting column, the positioning bolt slides to the locking end of the locking block and is propped against the end surface of the locking end of the locking block, and meanwhile, the locking block is propped against a limiting surface after deflection so as to enter a locking state. The utility model provides a collapsible convenient and support of accomodating of instrument pillars such as ladder, scaffold frame, operation panel and outer post and stabilize the safe problem of both contradictions each other.

Description

Foldable support column structure with locking function

Technical Field

The utility model relates to a ladder, scaffold frame, operation panel, all kinds of operation appurtenance such as workstation, especially are used for collapsible pillar (supporting leg) on this type of instrument.

Background

Tools used in climbing operations such as ladders and scaffolding are a very common type of tool in all industries and in our daily lives. Some operation occasions have specific demand to bearing weight, and ordinary ladder or scaffold can't satisfy its bearing, thereby the bending of easy emergence pillar causes danger. In the above case, a ladder or scaffolding with external struts becomes the best choice for safety reasons.

The outer support is a support which is erected outside the support and forms a certain angle with the support, and the outer support is combined with the support body, so that the outer support can bear larger weight, provides larger support stability and meets the requirements of more occasions.

The ladder or the scaffold with the outer support has a common problem that the outer support cannot be bent, and a large storage space is required to be occupied when the ladder or the scaffold is not used; in the case of transportation, since the support column cannot be stored, fewer tools can be transported in the same batch of transportation, and the transportation cost is relatively high. On the other hand, various working tools such as ladders, scaffolds, operation platforms and workbenches have the requirements of supporting stability and safety when being used as outer pillars. Therefore, for the outer pillar structure, the folding storage convenience and the supporting stability and safety are often contradictory.

Disclosure of Invention

The utility model provides a but possess locking function's folding support structure, its purpose is collapsible to be accomodate the convenience and support the problem of stable safety both contradiction each other with solving.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a foldable support column structure with a locking function comprises a support column and an outer support column, wherein the upper part of the outer support column is hinged with the support column; the innovation lies in that:

the support is arranged below the hinge joint of the upper part of the outer support and the support and is fixed relative to the support; the support is provided with a locking cavity, the support corresponding to the side part of the locking cavity is provided with a strip notch, the length direction of the strip notch is consistent with the axial direction of the support or forms an included angle, and the included angle is smaller than the maximum opening angle of the outer support relative to the support.

A connecting rod is arranged between the strut and the outer strut, one end of the connecting rod is connected with the bracket through a positioning bolt, the connecting relation is that the positioning bolt is positioned in the long-strip notch of the bracket and can move along the length direction of the long-strip notch, and meanwhile, the positioning bolt is positioned and connected with one end of the connecting rod; the other end of the connecting rod is hinged with the lower part of the outer support.

The locking cavity of the bracket is internally provided with a locking block which is provided with a rotating end and a locking end, the rotating end of the locking block is rotatably connected with the bracket, an elastic element is arranged between the locking block and the bracket and forces the locking block to rotate towards one side, and a limiting surface is arranged in the rotating direction of the locking block and used for preventing the locking block from rotating.

When the outer pillar is opened to the maximum opening angle relative to the pillar, the positioning bolt slides to the locking end of the locking block and is pressed against the end face of the locking end of the locking block, and meanwhile, the locking block is deflected and then is pressed against the limiting surface to enter a locking state.

The relevant content in the above technical solution is explained as follows:

1. in the scheme, the inclination of the inclined plane at the upper part of the outer support is 5-45 degrees; the inclination refers to an included angle formed by an inclined plane at the upper part of the outer pillar and the side surface of the pillar when the outer pillar is in a furled state, namely the outer pillar and the pillar are closed and attached; wherein, the angle of 5-45 degrees includes the angle of 5 degrees and the angle of 45 degrees.

2. In the above scheme, the elastic element is a torsion spring, a spring or a spring sheet.

3. In the above scheme, the positioning bolt is a pin or a shaft pin.

4. In the above scheme, after the locking state is achieved, the end face of the locking end of the locking block is a small inclined face when viewed in a direction parallel to the axial direction of the positioning bolt, the small inclined face faces one side of the positioning bolt, and an included angle between the small inclined face and the vertical direction of the length direction of the long-strip notch is smaller than 20 degrees.

5. In the above scheme, one end of the strip-shaped notch for locking is provided with a turning corner.

Because of above-mentioned technical scheme's application, the utility model discloses for prior art have following advantage and effect:

1. the utility model discloses an add the support of taking rectangular notch in the bottom of pillar, use the connecting rod to combine outer pillar and pillar, form the triangle structure, increased stability, can make ladder or scaffold frame or operation panel etc. bear bigger weight to simultaneously can also more stability.

2. The utility model discloses an install the locking piece additional, spacing to the gim peg through the locking piece, the gim peg is in during the rectangular notch lower part of support, elastic element makes the locking piece rotate to spacing face side to make terminal surface withstand the gim peg under the locking piece, can play and prevent that the outer post is unexpected to draw in, ensure that the unexpected situation of drawing in of outer post can not appear and take place, increase the security of using.

3. The end face of the locking end of the locking block of the utility model is designed into a small inclined plane with an included angle smaller than 20 degrees, and the end face of the locking end of the locking block is used for supporting (abutting) the positioning bolt without clearance after entering a locking state. The small-angle inclined plane within 20 degrees not only has the self-locking function, but also allows the mechanism to have manufacturing errors, and solves the problem of unreliable locking caused by manufacturing tolerance.

4. The utility model discloses the one end that is used for the locking at rectangular notch is equipped with the turning of turning, and its effect is in order to improve the reliability that outer post supported and locked under the locking state. Because in this state the corners can share the supporting force on the one hand and can lock the position of the positioning bolt in the elongated notch on the other hand, finally, a firm and reliable locking effect is achieved.

Drawings

FIG. 1 is a perspective view of a product (ladder) to which the embodiment of the present invention is applied;

FIG. 2 is a perspective view of a pillar structure according to an embodiment of the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2;

FIG. 4 is a perspective view of the folding state of the two side pillar structures of the embodiment of the present invention;

FIG. 5 is a plan view of the structure of the struts of the two sides of the present invention in a state where one side is open and the other side is folded;

FIG. 6 is an enlarged view of FIG. 5 at B;

FIG. 7 is an enlarged view at C of FIG. 5;

FIG. 8 is a plan view showing an opened state of the strut structures at both sides of the embodiment of the present invention;

FIG. 9 is a perspective view of a folded state of two side pillar structures according to another embodiment of the present invention;

FIG. 10 is a plan view of a structure of two side pillars of the present invention, in which one side is open and the other side is folded;

fig. 11 is a plan view showing an opened state of the strut structures at both sides according to another embodiment of the present invention.

In the above drawings: 1. a pillar; 2. an outer strut; 3. a connecting member; 4. a support; 5. a strip slot; 6. a connecting rod; 7. positioning bolts; 8. a locking block; 9. a groove; 10. a bevel; 11. a locking cavity; 12. a limiting surface; 13. a small bevel; 14. twisting and bouncing; 15. and (6) turning.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example (b): foldable support column structure with locking function

Referring to fig. 1 to 8, the collapsible support structure of the present embodiment, which is suitable for a ladder (see fig. 1), includes a support 1 and an outer support 2 (see fig. 2).

The post 1 is provided with a connecting piece 3 (see fig. 2 and 4), the connecting piece 3 is formed by bending a steel plate or is made of a one-step forming section and is positioned at the upper part of the outer post 2, the connecting piece 3 is hinged with the post 1, and the connecting piece 3 is fixedly connected with the outer post 2 (see fig. 5). The connection mode can enable the outer post 2 to rotate on the side surface of the post 1, so that the outer post 2 has the functions of opening and closing relative to the post 1.

The pillar 1 is provided with a bracket 4 (see fig. 3 and 7), and the bracket 4 is folded into a groove shape by a steel plate or formed into a groove shape by other materials. The bracket 4 is arranged below the connecting piece 3 and fixed relative to the pillar 1. The support 4 is provided with a locking cavity 11 (see fig. 3, 6 and 7), the support 4 corresponding to the side part of the locking cavity 11 is provided with a strip notch 5 (see fig. 3 and 7), and the length direction of the strip notch 5 is consistent with the axial direction of the strut 1.

A connecting rod 6 (see fig. 5 and 8) is arranged between the strut 1 and the outer strut 2, one end of the connecting rod 6 is connected with the bracket 4 through a positioning bolt 7 (see fig. 3, 6 and 7), the connection relationship is that the positioning bolt 7 is positioned in the elongated slot 5 of the bracket 4 and can be displaced along the length direction of the elongated slot 5, and the positioning bolt 7 is positioned and connected with one end of the connecting rod 6. The positioning pin 7 may be a pin or a shaft pin. The other end of the connecting rod 6 is hinged to the lower part of the outer post 2 (see fig. 5 and 8). When the outer post 2 is opened or closed relative to the post 1, one end of the link 6 slides back and forth in the length direction of the elongated slot 5 by means of the positioning pin 7.

A locking block 8 is arranged in the locking cavity 11 of the bracket 4 (see fig. 3, 6 and 7), and the outer contour of the locking block 8 is cuboid, but other shapes can be adopted, which is not important. The locking block 8 has a rotating end and a locking end, the rotating end of the locking block 8 is rotatably connected with the bracket 4 (see fig. 6 and 7), an elastic element (a torsion spring 14 is adopted in the embodiment, see fig. 6 and 7) is arranged between the locking block 8 and the bracket 4 and forces the locking block 8 to rotate towards one side, and a limiting surface 12 (the limiting surface 12 is the bottom surface of a locking cavity 11 on the bracket 4 in the embodiment, see fig. 3, 6 and 7) is arranged in the rotating direction of the locking block 8 and is used for preventing the locking block 8 from rotating. One side of the locking block 8 facing the limiting surface 12 is provided with a groove 9 (see fig. 6 and 7), and when the outer support column 2 is folded relative to the support column 1, the positioning bolt 7 is positioned in the groove 9 (see fig. 7), and the groove 9 is used for abdicating the positioning bolt 7 when the outer support column 2 and the support column 1 are folded.

In the state that the outer pillar 2 is folded relative to the pillar 1, the side part of the locking block 8 presses on the positioning bolt 7 (see fig. 7), as the outer pillar 2 is opened relative to the pillar 1, the positioning bolt 7 slides towards the locking end on the side part of the locking block 8 (see fig. 6), when the outer pillar 2 is opened to the maximum opening angle relative to the pillar 1, the positioning bolt 7 slides to the locking end of the locking block 8 and presses against the end surface of the locking end of the locking block 8, and meanwhile, the locking block 8 deflects to press against the limiting surface 12, so that the locking state is achieved (see fig. 8).

After the locking state is achieved, the end face of the locking end of the locking block 8 is a small inclined surface 13 (refer to fig. 7) when viewed from the direction parallel to the axial direction of the positioning bolt 7, the small inclined surface 13 faces one side of the positioning bolt 7, and the included angle between the small inclined surface 13 and the vertical direction of the length direction of the long-strip notch 5 is smaller than 20 degrees. The small-angle inclined plane within 20 degrees not only has the self-locking function, but also allows the mechanism to have manufacturing errors, and solves the problem of unreliable locking caused by manufacturing tolerance. In order to improve the support and locking reliability of the outer post 2, a corner 15 is provided at the end of the elongated slot 5 intended for locking (see fig. 6 and 7).

The upper part of the outer post 2 or the side of the connector 3 facing the side of the post 1 is a bevel 10 (see fig. 4), the bevel 10 is used to provide a space, when the outer post 2 is opened, the bevel 10 of the outer post 2 will gradually abut the side of the post 1. The inclination of the inclined surface 10 is proportional to the opening of the outer leg 2. The inclination refers to an included angle formed by an inclined plane 10 at the upper part of the outer pillar 2 and the side surface of the pillar 1 in a furled state of the outer pillar 2, namely, under the condition that the outer pillar 2 and the pillar 1 are closed and attached. Preferably, the inclination is between 5 degrees and 45 degrees, including 5 degrees and 45 degrees.

In the actual use process, the outer post 2 is pulled, and the outer post 2 rotates through the hinge of the connecting piece 3. When the outer post 2 is opened, the upper inclined surface 10 of the outer post 2 abuts the side of the post 1 (see fig. 8). The stop bolt 7 slides on the side of the locking block 8 towards the locking end (see fig. 6 and 7), when the outer post 2 is opened to the maximum opening angle relative to the post 1, the stop bolt 7 slides to the locking end of the locking block 8 (i.e. at the lower end corner 15 of the elongated slot 5 on the bracket 4), and the elastic element (the torsion spring 14, see fig. 6 and 7) rotates the locking block 8 towards the bottom side of the bracket 4, so that the lower end face of the locking block 8 is abutted against the stop bolt 7, thereby ensuring that the condition that the outer post 2 is accidentally folded can not occur, and increasing the use safety (see fig. 8).

When the outer pillar 2 needs to be folded, the locking block 8 needs to be rotated by an angle in the opposite direction to unlock the locking block 8, then the outer pillar 2 is pulled to fold the outer pillar 2, at the moment, the positioning bolt 7 is positioned on the side part of the locking block 8 and slides upwards along the long-strip-shaped notch 5 until the outer pillar 2 is folded, the locking block 8 rotates towards one side of the pillar 1 under the action of the elastic element, and the positioning bolt 7 falls into the groove 9 of the locking block 8 and enters a folding state (see fig. 7).

Other embodiments and structural changes of the present invention are described below as follows:

1. in the above embodiment, the connecting member 3 is hinged to the pillar 1, and the connecting member 3 is fixedly connected to the outer pillar 2. However, the present invention is not limited to this, and the connection relationship between the two can be exchanged, that is, the connecting member 3 is fixedly connected to the pillar 1, and the connecting member 3 is hinged to the outer pillar 2. The exchange of this kind of relation of connection does not influence the utility model discloses the effect can both make the relative pillar 1 of outer pillar 2 possess the function of opening and foling. See in particular fig. 9, 10 and 11 for another embodiment.

2. In the above embodiment, the longitudinal direction of the elongated slot 5 coincides with the axial direction of the strut 1. However, the present invention is not limited to this, and in fact, the length direction of the strip-shaped slot 5 and the axial direction of the pillar 1 may form an included angle, but the included angle should be smaller than the maximum opening angle of the outer pillar 2 relative to the pillar 1. This is where the present invention allows for variations, but is generally designed in accordance with the teachings of the embodiments.

3. In the above embodiments, the elastic element is a torsion spring, but the present invention is not limited to this, and the elastic element may be a spring (a tension spring or a compression spring), or even a spring plate. In practice, it is only necessary to use a resilient element to force the locking block 8 to rotate towards the side of the stop surface 12, as will be readily understood by those skilled in the art.

4. In the above embodiment, the limiting surface 12 is the bottom surface of the locking cavity 11 on the bracket 4, and is used for preventing the locking block 8 from rotating. However, the present invention is not limited to this, and the stopper may be used to block the side of the pillar 1, or even may be implemented by using other mechanical limiting structures.

5. In the above embodiment, the end surface of the locking end of the locking piece 8 serves as a locking surface. However, the present invention is not limited to this, and a groove structure may be provided on the locking block 8 corresponding to the locking bolt 7, and the end surface inside the groove may also serve as a locking surface.

6. In the above embodiments, the foldable support column structure is applied to a ladder, but the present invention is not limited thereto, and can be applied to various work auxiliary tools such as a scaffold, an operation table, and a work table, and particularly to a foldable support column (support leg) used for such tools. As will be readily understood by those skilled in the art.

7. In the above embodiment, the upper part of the outer column 2 is connected to the column 1 by the connecting member 3, and actually, the connecting member 3 can be omitted from the viewpoint of mechanical principle. The upper parts of the strut 1 and the outer strut 2 are directly hinged, and only an elbow or a bend is made at the head part of the outer strut 2. In the above embodiments, the connecting piece 3 is used to realize the upper hinge joint of the pillar 1 and the outer pillar 2, mainly based on the process requirement of industrial mass production. This design is easy to manufacture and low cost.

8. In the present invention, the lower ends of the pillar 1 and the outer pillar 2 can be used as the ground contact supporting point (see fig. 1) at the same time, and only the lower end of the outer pillar 2 can be used as the ground contact supporting point, while the lower end of the pillar 1 is suspended and not used as the ground contact supporting point (see fig. 2, 4, 5 and 8). The lower ends of the strut 1 and the outer strut 2 are used as the ground contact supporting points at the same time, the stability is better, but the requirement on the flatness of the ground is higher, and only the lower end of the outer strut 2 is used as the ground contact supporting point, which is equivalent to the oblique extension of the lower end of the strut 1, so that a larger ground contact supporting surface can be provided. How to apply in the product can be determined according to actual conditions.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (8)

1. A foldable support structure with a locking function comprises a support (1) and an outer support (2), wherein the upper part of the outer support (2) is hinged with the support (1); the method is characterized in that:

the support (4) is arranged on the support (1), and the support (4) is arranged below a hinge point of the upper part of the outer support (2) and the support (1) and is fixed relative to the support (1); a locking cavity (11) is arranged on the support (4), a long-strip notch (5) is arranged on the support (4) corresponding to the side part of the locking cavity (11), the length direction of the long-strip notch (5) is consistent with the axial direction of the support (1) or forms an included angle, and the included angle is smaller than the maximum opening angle of the outer support (2) relative to the support (1);

a connecting rod (6) is arranged between the strut (1) and the outer strut (2), one end of the connecting rod (6) is connected with the bracket (4) through a positioning bolt (7), the connection relationship is that the positioning bolt (7) is positioned in the long-strip notch (5) of the bracket (4) and can move along the length direction of the long-strip notch (5), and meanwhile, the positioning bolt (7) is positioned and connected at one end of the connecting rod (6); the other end of the connecting rod (6) is hinged with the lower part of the outer pillar (2);

a locking block (8) is arranged in a locking cavity (11) of the bracket (4), the locking block (8) is provided with a rotating end and a locking end, the rotating end of the locking block (8) is rotatably connected with the bracket (4), an elastic element is arranged between the locking block (8) and the bracket (4) and forces the locking block (8) to rotate towards one side, and a limiting surface (12) is arranged in the rotating direction of the locking block (8) and used for preventing the locking block (8) from rotating;

when the outer support (2) is folded relative to the support (1), the side part of the locking block (8) is pressed on the positioning bolt (7), the positioning bolt (7) slides to the locking end on the side part of the locking block (8) along with the opening of the outer support (2) relative to the support (1), when the outer support (2) is opened to the maximum opening angle relative to the support (1), the positioning bolt (7) slides to the locking end of the locking block (8) and is pressed against the end surface of the locking end of the locking block (8), and meanwhile, the locking block (8) deflects and then is pressed against the limiting surface (12) to enter a locking state.

2. The foldable post structure of claim 1, wherein: one side of the locking block (8) facing the limiting surface (12) is provided with a groove (9), and the positioning bolt (7) is positioned in the groove (9) for abdicating in the state that the outer support column (2) is folded relative to the support column (1).

3. The foldable post structure of claim 1, wherein: after the locking state is entered, the end face of the locking end of the locking block (8) is a small inclined plane (13) when viewed in a direction parallel to the axial direction of the positioning bolt (7), the small inclined plane (13) faces one side of the positioning bolt (7), and the included angle between the small inclined plane (13) and the vertical direction of the length direction of the long-strip notch (5) is smaller than 20 degrees.

4. The foldable post structure of claim 1, wherein: the end of the strip notch (5) for locking is provided with a turning corner (15).

5. The foldable post structure of claim 1, wherein: the side, facing the side of the strut (1), of the upper part of the outer strut (2) or the connecting piece (3) is an inclined plane (10), and the inclination of the inclined plane (10) at the upper part of the outer strut (2) is 5-45 degrees.

6. The foldable post structure of claim 1, wherein: the strut (1) is provided with a connecting piece (3), the connecting piece (3) is positioned at the upper part of the outer strut (2), and the connecting piece (3) is hinged with one of the strut (1) and the outer strut (2) and is fixedly connected with the other.

7. The foldable post structure of claim 1, wherein: the elastic element is a torsion spring (14), a spring or a spring sheet.

8. The foldable post structure of claim 1, wherein: the positioning bolt (7) is a pin or a shaft pin.

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