Steel stair handrail base device without cast-in-place laminated layer

Abstract

The utility model discloses a cast-in-place laminated layer-free steel stair handrail base device, and relates to the technical field of stair handrail mounting, the cast-in-place laminated layer-free steel stair handrail base device comprises a mounting seat mounted on a stair step through a connecting piece, a clamping structure is fixedly arranged on the upper surface of the mounting seat, and a sleeve is arranged above the clamping structure. Through cooperative arrangement of the expansion plates, the clamping seats, the insertion pipes, the expansion grooves and other structures, during connection, the insertion pipes are rotated to enable the expansion grooves and the expansion plates to be staggered, then the insertion pipes are inserted into the clamping seats, and at the moment, the inner walls of the insertion pipes between the adjacent expansion grooves are subjected to reverse extrusion action of the expansion plates and expand and deform along the expansion grooves; and the sleeve is inserted into a gap formed between the expansion plate and the inner wall of the clamping seat to form interference clamping connection with the inner wall of the clamping seat, so that the handrail on the sleeve is stably connected with the clamping seat without secondary reinforcement, and the problems that the connection part of the sleeve and the base needs to be reinforced in sequence after the handrail is mounted in the existing handrail base, a large amount of time is wasted and the cost is reduced are avoided as much as possible. And the installation efficiency of the stair handrail is greatly influenced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stair handrail installation, in particular to a non-cast-in-place laminated steel stair handrail base device. BACKGROUND

[0002] With the continuous advancement of urbanization, the scale of urban construction in China is becoming larger and larger. High-rise buildings, subway engineering, bridge engineering and other projects require a large amount of steel structure materials. In order to speed up the construction process, some buildings use precast non-cast-in-place laminated steel stairs, and in order to reduce safety hazards, handrails are generally installed on both sides of the steel stairs or away from the wall.

[0003] The existing method generally fixes the handrail base on the stair tread through a connecting piece, and then inserts the sleeve under the handrail into the base to fix the handrail. In order to improve the stability of the connection, after inserting the sleeve into the base, the connection between the sleeve and the base is sequentially reinforced by welding or caulking, which wastes a lot of time and greatly affects the installation efficiency of the stair handrail. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to solve or at least alleviate the problem that the existing handrail base needs to be sequentially reinforced at the connection between the sleeve and the base after installing the handrail, which wastes a lot of time and greatly affects the installation efficiency of the stair handrail.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A non-cast-in-place laminated steel stair handrail base device, comprising a mounting seat mounted on the stair step through a connecting piece, a clamping structure fixedly arranged on the upper surface of the mounting seat, a sleeve arranged above the clamping structure, an insertion structure integrally formed at the bottom end of the sleeve and matched with the clamping structure, the sleeve being clamped with the clamping structure through the insertion structure, the clamping structure comprising a vertical column mounted on the center of the upper surface of the mounting seat, a plurality of expansion plates symmetrically welded on the circumference of the column, a clamping seat fixedly connected to the mounting seat on the circumference of the column, the insertion structure comprising an insertion tube integrally formed at the bottom end of the sleeve, and expansion grooves being formed on the circumference of the insertion tube.

[0007] By adopting the above technical scheme, when in use, the user first fixes the mounting seat on the stair step at a suitable position through the connecting rod, then aligns the insertion pipe formed at the bottom end of the sleeve with the clamping seat, rotates the insertion pipe to make the expansion groove formed on the insertion pipe be out of position with the expansion plate arranged in the clamping seat, at this time, presses the insertion pipe downward, the inner wall of the insertion pipe between the adjacent expansion grooves is reversely extruded by the expansion plate, expands and deforms along the expansion groove, and is inserted into the gap formed between the expansion plate and the inner wall of the clamping seat to form an interference clamping with the inner wall of the clamping seat, so that the fixing work of the handrail installed on the top of the sleeve is realized, and there is no need to reinforce the connection between the sleeve and the base again, the installation efficiency is greatly improved, and the problem that the existing handrail base needs to be reinforced after the handrail is installed is avoided, a large amount of time is wasted, and the installation efficiency of the stair handrail is greatly affected.

[0008] Optionally, the connecting piece comprises a connecting rod fixedly connected to the center of the lower surface of the mounting seat, and the connecting rod is embedded in the interior of the stair step and fixedly connected with the stair step.

[0009] By adopting the above technical scheme, the connecting rod is arranged to be fixed with the stair step, so that the clamping structure arranged on the upper surface of the mounting seat is fixed on the stair step.

[0010] Optionally, a plurality of screw grooves are formed on the circumferential side of the connecting rod and are equidistantly distributed along the height direction of the connecting rod.

[0011] By adopting the above technical scheme, a plurality of screw grooves are formed on the circumferential side of the connecting rod, which is used to increase the friction force at the connecting position of the connecting rod and the stair step, and greatly improves the stability of the connection of the connecting rod.

[0012] Optionally, the stand column is in a cylindrical structure, and a guide head in a hemispherical structure is fixedly connected to the top end of the stand column.

[0013] By adopting the above technical scheme, the guide head is arranged on the top of the stand column, which is used to guide the insertion pipe inserted into the clamping seat, and facilitates the user to use.

[0014] Optionally, the clamping seat is in a circular table structure, the inclination angle of the side wall of the clamping seat is consistent with the inclination angle of the expansion plate, and a gap with a width equal to the wall thickness of the mounting seat is left between the inner wall of the clamping seat and the expansion plate.

[0015] By adopting the above technical scheme, the gap with a width equal to the wall thickness of the mounting seat is left between the inner wall of the clamping seat and the expansion plate, so that the bottom end of the insertion pipe after expansion deformation can be inserted into the gap and interference clamped with the inner wall of the clamping seat.

[0016] Optionally, a reinforcing ring in a circular ring shape is arranged at the top end of the clamping seat, the inner wall of the bottom end of the reinforcing ring is flush with the inner wall of the top end of the clamping seat, and the inner diameter of the reinforcing ring is equal to the outer diameter of the insertion pipe.

[0017] By adopting the above technical solutions, a reinforcing ring is set to reinforce and limit the top of the insertion tube in the inner cavity of the insertion socket, so as to avoid the expansion groove on the insertion tube from cracking due to excessive compression.

[0018] Optionally, a limiting ring is fitted around the insertion tube above the expansion groove, and the limiting ring is welded to the insertion tube.

[0019] By adopting the above technical solution, a limiting ring is set to limit the depth of the insertion of the cannula into the inner cavity of the card holder, so as to ensure that the height of the sleeve above the card holder is consistent.

[0020] Optionally, four flat-headed steel nails are fixedly connected to the top of the sleeve, which are equidistantly distributed around the center of the sleeve.

[0021] By adopting the above technical solution, steel nails are used to fix the handrail at the top of the sleeve. By using flat-headed nails, it is possible to minimize the risk of the nail tip piercing the handrail and creating a safety hazard.

[0022] In summary, the beneficial effects of this application are as follows:

[0023] This application utilizes the cooperative arrangement of structures such as expansion plates, card seats, insert tubes, and expansion grooves. During connection, the insert tube is rotated to misalign the expansion groove with the expansion plate, and then the insert tube is inserted into the card seat. At this time, the inner wall of the insert tube between adjacent expansion grooves is subjected to the reverse compression of the expansion plate, causing it to expand and deform along the expansion groove. It then inserts into the gap formed between the expansion plate and the inner wall of the card seat, forming an interference fit with the inner wall of the card seat. This achieves a stable connection between the handrail on the sleeve and the card seat without the need for secondary reinforcement. This avoids the problem of existing handrail bases requiring reinforcement of the connection between the sleeve and the base after the handrail is installed, which wastes a lot of time and greatly affects the installation efficiency of stair handrails. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this application;

[0025] Figure 2 This is a schematic diagram of the installation structure of the expansion plate in this application;

[0026] Figure 3 This is a top view of the sleeve in this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Stair tread; 2. Mounting base; 3. Connecting rod; 4. Threaded groove; 5. Column; 6. Expansion plate; 7. Guide head; 8. Card seat; 9. Gap; 10. Reinforcing ring; 11. Sleeve; 12. Insert tube; 13. Expansion groove; 14. Limiting ring; 15. Steel nail. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-3This application will be described in further detail.

[0029] Please see Figures 1-3 A non-cast-in-place composite steel stair handrail base device includes a mounting base 2 installed on a stair tread 1 via a connector. The upper surface of the mounting base 2 is fixedly provided with a snap-fit ​​structure, which is fixed by the connector.

[0030] A sleeve 11 is provided above the snap-fit ​​structure. A handrail is installed at the top of the sleeve 11. A plug-in structure that is compatible with the snap-fit ​​structure is provided at the bottom of the sleeve 11. The sleeve 11 is snapped into the snap-fit ​​structure through the plug-in structure, thereby fixing the handrail to the stair tread 1.

[0031] The snap-fit ​​structure includes a column 5 vertically mounted at the center of the upper surface of the mounting base 2, multiple expansion plates 6 symmetrically welded around the column 5, and a snap-fit ​​seat 8 fixedly connected to the mounting base 2 around the column 5.

[0032] The insertion structure includes an integrally formed insertion tube 12 at the bottom end of the sleeve 11. An expansion groove 13 is formed on the periphery of the insertion tube 12. When the insertion tube 12 is inserted into the inner cavity of the retainer 8, it is compressed by the expansion plate 6, causing the insertion tube 12 to expand along the expansion groove 13 and interlock with the inner wall of the retainer 8, thus achieving the snap-fit ​​fixation of the insertion tube 12.

[0033] Reference Figure 1 The connector includes a connecting rod 3 fixedly connected to the center of the lower surface of the mounting base 2. The connecting rod 3 is embedded inside the stair tread 1 and fixedly connected to the stair tread 1. The connecting rod 3 is provided to fix it to the stair tread 1, thereby fixing the snap-fit ​​structure provided on the upper surface of the mounting base 2 to the stair tread 1.

[0034] Reference Figure 1 Multiple threaded grooves 4 are equidistantly distributed along the height direction of the connecting rod 3 on its circumference. The multiple threaded grooves 4 on the circumference of the connecting rod 3 are used to increase the friction at the connection between the connecting rod 3 and the stair tread 1, which greatly improves the stability of the connection of the connecting rod 3.

[0035] Reference Figure 2 The column 5 has a cylindrical structure, and a hemispherical guide head 7 is fixedly connected to the top of the column 5. The guide head 7 is installed on the top of the column 5 to guide the insertion tube 12 into the card holder 8, making it convenient for the user.

[0036] Reference Figure 1 The card holder 8 has a frustum-shaped structure. The inclination angle of the side wall of the card holder 8 is the same as that of the expansion plate 6. A gap 9 with a width equal to the wall thickness of the mounting base 2 is left between the inner wall of the card holder 8 and the expansion plate 6. The gap 9 with a width equal to the wall thickness of the mounting base 2 is left between the inner wall of the card holder 8 and the expansion plate 6 so that the bottom end of the expanded and deformed insertion tube 12 can be inserted into the gap 9 and press-fitted into the inner wall of the card holder 8.

[0037] Reference Figure 2 The top of the card holder 8 is provided with a circular reinforcing ring 10. The inner wall of the bottom end of the reinforcing ring 10 is flush with the inner wall of the top of the card holder 8, and the inner diameter of the reinforcing ring 10 is equal to the outer diameter of the insertion tube 12. The reinforcing ring 10 is provided to reinforce and limit the top of the insertion tube 12 inserted into the cavity of the card holder 8, so as to avoid the expansion groove 13 opened on the insertion tube 12 from cracking due to excessive compression.

[0038] Reference Figure 1 A limiting ring 14 is fitted around the insertion tube 12 above the expansion groove 13, and the limiting ring 14 is welded to the insertion tube 12. The limiting ring 14 is set to limit the depth of the insertion tube 12 into the inner cavity of the card holder 8, so as to ensure that the height of the sleeve 11 above the card holder 8 is consistent.

[0039] Reference Figure 3 Four steel nails 15, which are flat-headed, are fixedly connected to the top of the sleeve 11 and are equidistantly distributed around the center of the sleeve 11. The steel nails 15 are used to fix the handrail at the top of the sleeve 11. By making the steel nails 15 flat-headed, the tip of the steel nail 15 can be prevented from piercing the handrail and creating a safety hazard.

[0040] The implementation principle of this application is as follows: In use, the user first fixes the mounting base 2 to a suitable position on the stair tread 1 via the connecting rod 3, then aligns the insertion tube 12 formed at the bottom end of the sleeve 11 with the card seat 8, rotates the insertion tube 12 so that the expansion groove 13 opened on the insertion tube 12 is misaligned with the expansion plate 6 set inside the card seat 8, and then presses the insertion tube 12 down forcefully, inserting the insertion tube 12 into the inner cavity of the card seat 8. The inner wall of the insertion tube 12 between adjacent expansion grooves 13 is subjected to the reverse compression of the expansion plate 6, expands and deforms along the expansion groove 13, and inserts into the gap 9 formed between the expansion plate 6 and the inner wall of the card seat 8, forming an interference fit with the inner wall of the card seat 8, thereby realizing the fixing of the handrail installed on the top of the sleeve 11 without the need for further reinforcement, greatly improving the installation efficiency, and avoiding the problem that existing handrail bases require reinforcement of the connection between the sleeve 11 and the base after the handrail is installed, which wastes a lot of time and greatly affects the installation efficiency of the stair handrail.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A base device for a steel stair handrail without cast-in-place composite layer, comprising a mounting base (2) installed on a stair tread (1) via a connector, wherein a snap-fit ​​structure is fixedly provided on the upper surface of the mounting base (2), a sleeve (11) is provided above the snap-fit ​​structure, and a plug-in structure adapted to the snap-fit ​​structure is provided at the bottom end of the sleeve (11), wherein the sleeve (11) is snapped into the snap-fit ​​structure via the plug-in structure, characterized in that: The snap-fit ​​structure includes a column (5) vertically installed at the center of the upper surface of the mounting base (2), a plurality of expansion plates (6) are symmetrically welded around the column (5), and a snap-fit ​​seat (8) is fixedly connected to the mounting base (2) around the column (5). The plug-in structure includes a plug tube (12) integrally formed at the bottom end of the sleeve (11), and an expansion groove (13) is provided around the plug tube (12).

2. The non-cast-in-place composite steel staircase handrail base device according to claim 1, characterized in that: The connector includes a connecting rod (3) fixedly connected to the center of the lower surface of the mounting base (2), the connecting rod (3) being embedded inside the stair tread (1) and fixedly connected to the stair tread (1).

3. The non-cast-in-place composite steel staircase handrail base device according to claim 2, characterized in that: Multiple threaded grooves (4) are provided on the periphery of the connecting rod (3) and are equidistantly distributed along the height direction of the connecting rod (3).

4. The non-cast-in-place composite steel staircase handrail base device according to claim 1, characterized in that: The column (5) has a cylindrical structure, and a guide head (7) with a hemispherical structure is fixedly connected to the top of the column (5).

5. The non-cast-in-place composite steel staircase handrail base device according to claim 4, characterized in that: The card holder (8) has a frustum-shaped structure. The inclination angle of the side wall of the card holder (8) is the same as that of the expansion plate (6). There is a gap (9) between the inner wall of the card holder (8) and the expansion plate (6) with a width equal to the wall thickness of the mounting base (2).

6. The non-cast-in-place composite steel staircase handrail base device according to claim 5, characterized in that: The top of the card holder (8) is provided with a ring-shaped reinforcing ring (10). The inner wall of the bottom end of the reinforcing ring (10) is flush with the inner wall of the top end of the card holder (8). The inner diameter of the reinforcing ring (10) is equal to the outer diameter of the insertion tube (12).

7. The non-cast-in-place composite steel staircase handrail base device according to claim 1, characterized in that: A limiting ring (14) is provided around the insertion tube (12) above the expansion groove (13), and the limiting ring (14) is welded to the insertion tube (12).

8. The non-cast-in-place composite steel staircase handrail base device according to claim 1, characterized in that: The top of the sleeve (11) is fixedly connected to four steel nails (15) that are equidistantly distributed around the center of the sleeve (11). The steel nails (15) are flat-headed nails.

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