An advertising sign adapted for stable installation in rock formations

Abstract

The utility model discloses an advertisement signboard suitable for rock layer stable installation belongs to signboard technical field, including the fixed support foot for supporting signboard, rubber expansion column, connecting bolt, the rubber expansion column installs and embeds the prepared hole in rock layer, the rubber expansion column most bottom end is provided with the connector, and the position close to the connector is provided with the contraction section, and the connecting bolt front end is provided with the thread part of adaptation, when installing, the connecting bolt passes through the fixed support foot and inserts in the rubber expansion column, the thread part is connected with the connector thread, and the connector extrudes the contraction section contraction. Can be stably and firmly installed in rock layer, and simultaneously effectively reduces stress to rock layer damage cracking after installing, makes signboard keep long -term stability.

Description

Technical Field

[0001] This utility model relates to the field of signage technology, and in particular to an advertising signage suitable for stable installation in rock formations. Background Technology

[0002] With the rapid development of the outdoor advertising industry, advertising signs have been widely used along highways, in mountainous scenic areas, and around mines. Rock strata, as a natural high-bearing-capacity carrier, are characterized by their resistance to settlement and high space utilization, making them an important installation foundation for outdoor advertising signs (such as large billboards along mountain roads and directional signs at scenic area entrances). Statistics show that over 60% of outdoor advertising signs in mountainous and hilly areas of my country are installed using rock strata, and the demand continues to grow with the development of the outdoor economy. Currently, there are three main conventional methods for installing advertising signs on rock strata, all of which have significant technical shortcomings: Direct fixing method: The sign is directly fixed to the rock surface using fasteners such as expansion bolts and chemical anchors. The disadvantage of this method is that its stability is limited by the characteristics of the rock strata: If the rock strata have fissures, weathered layers, or weak interlayers, the holding force of the expansion bolts will decrease sharply over time, easily leading to loosening and detachment of the sign, posing a serious safety hazard; Bracket fixing method: The sign is fixed to a pre-installed metal bracket by welding or bolting, and then the bracket is embedded into the rock strata. The problems with this method are: uneven stress distribution: the contact area between the metal support and the rock layer is small, and if the support design does not fully consider the stress distribution of the rock layer (such as vertical pressure and horizontal wind force), it is easy to cause deformation and breakage of the support; corrosion problems: in mountainous environments, rainwater and fog will corrode the support and bolts, shortening their service life. Concrete foundation method: excavate a foundation pit on the surface of the rock layer, pour a concrete foundation, and then fix the sign on the foundation. The disadvantages of this method are: high construction complexity: it requires steps such as foundation pit excavation, formwork support, and concrete curing, resulting in a long construction period (usually 7-10 days) and significant weather influence; damage to the rock layer structure: foundation pit excavation will damage the integrity of the rock layer, potentially causing local collapses (especially in severely weathered rock layers), which does not conform to the modern construction concept of "ecological protection".

[0003] The existing methods of installing advertising signs on rock formations have many problems, such as poor stability, complex construction, environmental damage, and high maintenance costs, which cannot meet the modern outdoor advertising requirements for "long-term stability, ecological and environmental protection, and efficient installation". Utility Model Content

[0004] To address the aforementioned problems, this utility model aims to solve the problems described above. One objective of this utility model is to provide a structure for installing advertising signs that is suitable for rock strata characteristics, offers stable installation, is easy to construct, and is environmentally friendly.

[0005] The solution adopted in this embodiment is: an advertising sign suitable for stable installation in rock formations, including fixed legs for supporting the sign, rubber expansion columns, and connecting bolts; the rubber expansion columns are embedded in pre-drilled holes in the rock formations during installation, the bottom end of the rubber expansion columns is provided with a connector, a contraction section is provided near the connector, and the front end of the connecting bolts is provided with a matching threaded part.

[0006] During installation, the connecting bolt passes through the fixed support and is inserted into the rubber expansion column. The threaded part is threadedly connected to the connector, and the connector compresses the contraction section to contract.

[0007] In order to allow the rubber expansion column to be smoothly installed into the hole in the rock stratum, the upper end of the rubber expansion column is provided with a guide section, and several reinforcing strips are embedded inside the guide section to keep the guide section in a straight line during installation.

[0008] The preferred technical solution is that the reinforcing strips are arranged obliquely, and as they extend deeper from the fixed support leg, the reinforcing strips move closer to the center.

[0009] A preferred technical solution is that the diameter of the contraction section is smaller than the diameter of the guide section, and an annular step is formed between the outer surface of the contraction section and the outer surface of the guide section.

[0010] To ensure a more secure installation, one end of the connector is fixedly connected to the contraction section. The diameter of the connector is equal to the diameter of the guide section. The end of the connector is provided with several snap-fit ​​strips, which are located within the annular step.

[0011] In order to apply radial extrusion force to the entire rubber expansion column, the connecting bolt is provided with a straight rod section in the middle section. The diameter of the straight rod section is larger than the inner diameter of the rubber expansion column, and the side wall of the straight rod section is provided with several exhaust guide grooves.

[0012] To facilitate the installation of the sign, the fixed support includes a fixed support column and a connecting plate. The connecting plate is provided with four mounting holes, and the end of the connecting bolt is provided with a hexagonal end cap. During installation, the connecting bolt passes through the mounting holes, and the hexagonal end cap abuts against the connecting plate.

[0013] To adapt to the flatness of the ground and reduce stress damage to the rock strata after installation, a rubber pad is also included. The rubber pad is located on the lower side of the connecting plate, and the connecting bolts pass through the rubber pad during installation.

[0014] Compared with the prior art, the advertising signs of this utility model, which are suitable for installation in stable rock formations, have the following technical advantages:

[0015] 1. This application applies to advertising signs that are stably installed in rock strata, including fixed supports, rubber expansion columns, and connecting bolts for supporting the sign. During installation, the rubber expansion columns are embedded in pre-drilled holes in the rock strata. Each rubber expansion column has a connector at its bottom end and a contraction section near the connector. The connecting bolts have a matching threaded portion at their front end. During installation, the connecting bolts pass through the fixed supports and are inserted into the rubber expansion columns. The threaded portion is threadedly connected to the connector, and the connector compresses the contraction section. This allows for stable and secure installation in the rock strata, effectively reducing stress-induced cracking and ensuring the long-term stability of the sign.

[0016] Other features and advantages of the present invention will become clear when reading the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an advertising sign suitable for stable installation in rock formations, provided in a specific embodiment of this utility model.

[0019] Figure 2 This is provided in a specific embodiment of the present utility model. Figure 1 Enlarged structural diagram of section A;

[0020] Figure 3 This is a schematic diagram of the internal structure of the rubber expansion column provided in a specific embodiment of this utility model;

[0021] In the picture:

[0022] 1. Rubber expansion column; 2. Fixed support leg; 3. Connecting bolt; 4. Rubber pad; 11. Guide section; 12. Contraction section; 13. Connector; 14. Annular step; 15. Snap-fit ​​strip; 16. Reinforcing strip; 21. Fixed support column; 22. Connecting plate; 221. Mounting hole; 31. Hexagonal end cap; 32. Vent guide groove; 33. Threaded part; 34. Straight rod part. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0024] The following description, in conjunction with the accompanying drawings and embodiments, details the advertising signboard suitable for stable installation in rock formations.

[0025] like Figure 1-3 As shown, an advertising sign suitable for stable installation in rock formations includes a fixed support leg 2, a rubber expansion column 1, and a connecting bolt 3. The fixed support leg 2 is the basic support structure that bears the weight of the advertising sign. It is connected to the rubber expansion column 1 through the connecting bolt 3, transferring the load of the sign to the rock formation. The rubber expansion column 1 is the core functional component for fixing the sign to the rock formation. It forms a tight fit with the inner wall of the rock formation's pores through elastic deformation. The connecting bolt 3 is the key fastener connecting the fixed support leg 2 and the rubber expansion column 1. Its axial tensile force can be converted into the radial expansion force of the rubber expansion column 1. The three components work together to form a stable force transmission chain of "sign - fixed support leg 2 - connecting bolt 3 - rubber expansion column 1 - rock formation", solving the problems of easy loosening and poor stability of traditional signs when installed in rock formations.

[0026] The rubber expansion column 1 is embedded in a pre-drilled hole in the rock layer during installation. A connector 13 is provided at the bottom of the rubber expansion column 1, and a contraction section 12 is provided near the connector 13. The front end of the connecting bolt 3 is provided with a matching threaded part 33. The design of embedding the rubber expansion column 1 into the hole in the rock layer utilizes the high strength characteristics of the rock layer as the installation foundation, avoiding the settlement problem caused by soft soil in traditional ground installation.

[0027] The connector 13 is designed to form a mechanical connection with the threaded portion 33 of the connecting bolt 3, ensuring effective force transmission. The shrinkage section 12 is located near the connector 13 and is made of highly elastic rubber. When squeezed by the connector 13, it can deform significantly in the radial direction, providing deformation space for the overall expansion of the rubber expansion column 1. The threaded portion 33 at the front end of the connecting bolt 3 is matched with the thread of the connector 13, ensuring that there will be no stripping during tightening and improving the reliability of the connection.

[0028] During installation, the connecting bolt 3 passes through the fixed support 2 and is inserted into the rubber expansion column 1. The threaded portion 33 is threadedly connected to the connector 13, which compresses the contraction section 12. First, the rubber expansion column 1 is inserted into a pre-drilled hole in the rock stratum. The hole diameter is slightly smaller than the initial diameter of the rubber expansion column 1 to ensure initial positioning. Then, the connecting bolt 3 passes through the mounting hole 221 of the fixed support 2 and is inserted into the internal channel of the rubber expansion column 1. Next, the connecting bolt 3 is tightened, and its threaded portion 33 engages with the thread of the connector 13, causing the connector 13 to move towards the fixed support 2. As the connector 13 moves, its end face compresses the contraction section 12, causing the contraction section 12 to expand radially outward. The axial force through the threaded connection is converted into the radial expansion force of the rubber expansion column 1, making the outer surface of the rubber expansion column 1 tightly adhere to the inner wall of the hole in the rock stratum, forming a huge frictional force, thereby fixing the rubber expansion column 1 in the rock stratum. The fixed support 2 is connected to the rubber expansion column 1 through the connecting bolt 3, thus achieving stable support for the sign.

[0029] To ensure the smooth installation of the rubber expansion column 1 into the hole in the rock stratum, a guide section 11 is provided at the upper end of the rubber expansion column 1. Several reinforcing strips 16 are embedded inside the guide section 11 to maintain a straight line during installation. The guide section 11 is located at the upper end of the rubber expansion column 1, i.e., the front end in the insertion direction, and its end is designed in a conical shape to guide the rubber expansion column 1 smoothly into the rock stratum hole, avoiding installation jamming caused by deviations in the verticality of the hole. The reinforcing strips 16 embedded inside the guide section 11 are rigid metal strips, such as stainless steel. Their function is to enhance the bending resistance of the guide section 11: if the guide section 11 did not have reinforcing strips 16, it might bend due to friction from the inner wall of the hole during installation, making insertion impossible; the presence of the reinforcing strips 16 keeps the guide section 11 in a straight line during installation, ensuring that the rubber expansion column 1 is inserted along the axis of the hole; this improves the ease and accuracy of installation of the rubber expansion column 1, avoiding uneven contact between the rubber expansion column 1 and the inner wall of the hole due to installation deviations, which would affect the fixing effect after expansion.

[0030] The preferred technical solution is that the reinforcing strips 16 are arranged obliquely, and as they move deeper into the fixed support 2, several reinforcing strips 16 move closer to the center. The design of the reinforcing strips 16 being obliquely arranged and moving closer to the center is similar in principle to the "guide groove of a drill bit": when the rubber expansion column 1 is inserted into the hole, the oblique reinforcing strips 16 will guide the guide section 11 to shift towards the center of the hole, correcting minor deviations during installation. The structure of moving closer together as it goes deeper makes the front end of the guide section 11 form a "pointed cone" rigid structure, which makes it easier to break through small rock fragments or protrusions in the hole and reduce installation resistance. This further improves the installation accuracy and smoothness of the rubber expansion column 1, and is especially suitable for rock strata environments with relatively rough inner walls of the hole.

[0031] The preferred technical solution is that the diameter of the contraction section 12 is smaller than the diameter of the guide section 11, and an annular step 14 is formed between the outer surface of the contraction section 12 and the outer surface of the guide section 11. The design that the diameter of the contraction section 12 is smaller than the diameter of the guide section 11 makes it possible to form an annular step 14 between the two. The smaller diameter of the contraction section 12 allows for a larger space for radial expansion, ensuring sufficient contact area with the inner wall of the rock stratum cavity.

[0032] To ensure a more secure installation, one end of the connector 13 is fixedly connected to the contraction section 12. The diameter of the connector 13 is equal to the diameter of the guide section 11. Several snap-fit ​​strips 15 are provided at the end of the connector 13, located within the annular step 14. The connector 13 and contraction section 12 are fixedly connected and integrally molded using a vulcanization process. This ensures that when the connector 13 squeezes the contraction section 12, the force is 100% transmitted to the contraction section 12, preventing separation between the connector 13 and the contraction section 12. The design that the diameter of the connector 13 is equal to the diameter of the guide section 11 ensures that after the rubber expansion column 1 is installed, the outer surface of the connector 13 is flush with the outer surface of the guide section 11, forming a continuous cylindrical surface. This increases the contact area with the inner wall of the rock stratum cavity, improving friction.

[0033] The snap-fit ​​strip 15 is located in the annular step 14. It is made of hard plastic or metal. When the contraction section 12 expands, the snap-fit ​​strip 15 moves radially outward along with the contraction section 12 and embeds into the tiny cracks in the inner wall of the rock stratum cavity to form a mechanical engagement. Through the dual fixing method of "friction force of rubber expansion + mechanical engagement of snap-fit ​​strip 15", the installation firmness of rubber expansion column 1 is significantly improved, and it will not loosen even when subjected to external forces such as strong wind.

[0034] In order to apply radial extrusion force to the entire rubber expansion column 1, a straight rod portion 34 is provided in the middle section of the connecting bolt 3. The diameter of the straight rod portion 34 is larger than the inner diameter of the rubber expansion column 1. Several exhaust guide grooves 32 are provided on the side wall of the straight rod portion 34. The exhaust guide grooves 32 make the connecting bolt 3 more stable when inserted and avoid the influence of air pressure. The diameter of the straight rod 34 in the middle section of the connecting bolt 3 is larger than the inner diameter of the rubber expansion column 1 by 0.5 to 1 mm. When the connecting bolt 3 is screwed into the rubber expansion column 1, the straight rod 34 applies a radial compressive force to the inner wall of the rubber expansion column 1. The compression of the straight rod 34 and the expansion of the contraction section 12 form a "double radial force": the straight rod 34 compresses the upper part of the rubber expansion column 1, causing that area to expand radially; the contraction section 12 is compressed by the connector 13, causing the lower part to expand radially. The two work together to ensure that the rubber expansion column 1 is tightly fitted to the inner wall of the rock cavity along its entire length. This avoids the "single-point fixing" problem caused by the expansion of only the lower part of the traditional rubber expansion bolt, increases the contact area between the rubber expansion column 1 and the rock stratum, and enhances the overall stability.

[0035] To facilitate the installation of the sign, the fixed support 2 includes a fixed support column 21 and a connecting plate 22. The connecting plate 22 has four mounting holes 221. The end of the connecting bolt 3 is provided with a hexagonal end cap 31. During installation, the connecting bolt 3 passes through the mounting holes 221, and the hexagonal end cap 31 abuts against the connecting plate 22. The fixed support column 21 is a cylindrical steel pipe, and its height is designed according to the size of the sign to support the weight of the sign. The connecting plate 22 is a rectangular steel plate, which is welded to the fixed support column 21 and is used to connect the connecting bolt 3. The connecting plate 22 has four mounting holes 221, which are arranged in a rectangular shape and spaced 100-150mm apart. Their function is to: distribute the weight of the sign and prevent a single connecting bolt 3 from breaking due to excessive force; and improve the stability of the fixed support 2 to prevent the sign from rotating due to wind. The design of the hexagonal end cap 31 at the end of the connecting bolt 3 makes it easy to tighten with tools such as wrenches, improving installation efficiency; the structure of the hexagonal end cap 31 abutting against the connecting plate 22 converts the axial tension of the connecting bolt 3 into pressure on the connecting plate 22, ensuring that there is no gap between the fixed support 2 and the connecting bolt 3, and preventing the sign from shaking.

[0036] To adapt to uneven ground and reduce stress damage to the rock strata after installation, a rubber pad 4 is included. The rubber pad 4 is located on the lower side of the connecting plate 22, and the connecting bolt 3 passes through the rubber pad 4 during installation. The rubber pad 4 is rectangular, with the same dimensions as the connecting plate 22, and a thickness ≥10mm. Its material is aging-resistant rubber, such as nitrile rubber, which has good elasticity and shock absorption performance. Adapting to uneven ground: When there are small protrusions or depressions on the rock strata surface, the rubber pad 4 can undergo elastic deformation to keep the connecting plate 22 horizontal and prevent the fixed support 2 from tilting due to uneven ground. Absorbing vibrations generated by wind, vehicles, etc., the signboard reduces stress damage to the rock strata. The rock strata are brittle materials, and long-term vibration can easily lead to the expansion of holes, which in turn can loosen the rubber expansion column 1. Anti-wear function: Preventing the connecting plate 22 from directly contacting the rock strata surface and causing wear, thus extending the service life of the fixed support 2.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes that element.

[0038] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. The utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An advertising sign suitable for stable installation in rock formations, characterized in that: It includes fixed legs for supporting the sign, rubber expansion columns, and connecting bolts; the rubber expansion columns are embedded in holes drilled in the rock strata during installation, the bottom end of the rubber expansion columns is provided with a connector, a contraction section is provided near the connector, and the front end of the connecting bolts is provided with a matching threaded part; During installation, the connecting bolt passes through the fixed support and is inserted into the rubber expansion column. The threaded part is threadedly connected to the connector, and the connector compresses the contraction section to contract.

2. The advertising signboard suitable for stable installation in rock formations as described in claim 1, characterized in that: The upper end of the rubber expansion column is provided with a guide section, and several reinforcing strips are embedded inside the guide section to keep the guide section in a straight line during installation.

3. The advertising signboard suitable for stable installation in rock strata as described in claim 2, characterized in that: The reinforcing strips are arranged diagonally, and as they extend deeper from the fixed support leg, they converge towards the center.

4. The advertising signboard suitable for stable installation in rock strata as described in claim 2, characterized in that: The diameter of the contraction section is smaller than the diameter of the guide section, and an annular step is formed between the outer surface of the contraction section and the outer surface of the guide section.

5. The advertising signboard suitable for stable installation in rock strata as described in claim 4, characterized in that: One end of the connector is fixedly connected to the contraction section. The diameter of the connector is equal to the diameter of the guide section. The end of the connector is provided with a plurality of snap-fit ​​strips, which are located in the annular step.

6. The advertising signboard suitable for stable installation in rock strata as described in claim 1, characterized in that: The connecting bolt has a straight rod section in the middle, the diameter of which is larger than the inner diameter of the rubber expansion column, and the side wall of the straight rod section has several exhaust guide grooves.

7. The advertising signboard suitable for stable installation in rock strata as described in claim 6, characterized in that: The fixed support includes a fixed support column and a connecting plate. The connecting plate is provided with four mounting holes. The end of the connecting bolt is provided with a hexagonal end cap. During installation, the connecting bolt passes through the mounting holes, and the hexagonal end cap abuts against the connecting plate.

8. The advertising signboard suitable for stable installation in rock formations as described in claim 7, characterized in that: It also includes a rubber pad, which is located on the lower side of the connecting plate, and the connecting bolt passes through the rubber pad during installation.

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