Fabricated stair

Abstract

The utility model discloses an assembly type stair which comprises a stair body, an assembly table is arranged at the upper end of the stair body, and a fixing base is arranged at the lower end of the stair body. A mounting groove with a downward opening is formed in the bottom surface of the fixed seat, an adjusting seat is arranged in the mounting groove, a working cavity is formed in the fixed seat above the mounting groove, a pair of height adjusting parts is arranged in the working cavity, lifting ends for driving the adjusting seat to translate up and down are arranged on the height adjusting parts, and a driving part is arranged in the working cavity between the two height adjusting parts; the driving part is in transmission connection with the two height adjusting parts, and the driving part is provided with an operation end embedded in the top face of the fixing base. The utility model has the advantages that the adjusting seat is easily driven to translate up and down, the overall height of the fixing seat is changed, the height adjustment of the assembly type stairway formed by the stairway main body, the assembly table and the fixing seat is realized, the problem of insufficient height when the assembly type stairway is installed between adjacent floors is solved, and the installation height deviation of the assembly type stairway is avoided; and the stability after installation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled buildings, in particular to an assembled staircase with adjustable height. Background Art

[0002] Prefabricated buildings are structures assembled on-site from prefabricated components. Based on the form of prefabricated components and the construction method, they are categorized into five types: block buildings, panel buildings, cassette buildings, skeleton panel buildings, and riser-slab and riser-story buildings. Prefabricated staircases are one such type of prefabricated building. Existing prefabricated staircases lack height adjustment, which often results in issues such as insufficient ground clearance or excessive floor height during installation. This in turn causes deviations in the installation height, impacting the stability of the staircase. Summary of the Invention

[0003] The purpose of the present invention is to address the defects of the prior art and provide an assembled staircase for use in an assembled building, wherein the assembled staircase can be adjusted in height to accurately adapt to the floor heights of adjacent floors of the assembled building.

[0004] In order to achieve the above purpose, the present invention can adopt the following technical solutions:

[0005] The assembled staircase described in the present invention includes a staircase main body, an assembly platform is provided at the upper end of the staircase main body, and a fixed seat is provided at the lower end; a mounting groove with an opening facing downward is provided on the bottom surface of the fixed seat, an adjustment seat is provided in the mounting groove, a working cavity is provided in the fixed seat above the mounting groove, a pair of height adjustment parts are provided in the working cavity, the height adjustment parts have a lifting end for driving the adjustment seat to move up and down, a driving part is provided in the working cavity between the two height adjustment parts, the driving part is connected to the two height adjustment parts in a transmission manner, and the driving part has an operating end embedded in the top surface of the fixed seat.

[0006] Specifically, the height adjustment part includes a through-hole vertically opened between the mounting slot and the working chamber, a lifting sleeve is provided in the through-hole, a positioning groove is opened from top to bottom on the wall of the through-hole, a positioning slider sliding along the positioning groove is provided on the outer wall of the lifting sleeve, a rotating screw is adapted to be threaded in the lifting sleeve, and the upper end of the rotating screw is coaxially fixedly connected to a rotating gear disk located in the working chamber; the driving part includes a driving gear disk arranged in the working chamber, the driving gear disk is respectively engaged with the two rotating gear disks, the top surface center of the driving gear disk is coaxially fixedly connected to a rotating shaft, the upper end of the rotating shaft is coaxially fixedly connected to a rotating head, the top surface of the rotating head is flush with the top surface of the fixed seat, and an inner hexagonal operating hole is opened on it.

[0007] Furthermore, in order to make the lifting sleeve lift more stably vertically, a plurality of positioning grooves are evenly spaced along the circumference of the perforated hole wall. At the same time, a plurality of positioning sliders correspond one to one to the positioning grooves and are evenly distributed on the outer wall of the lifting sleeve.

[0008] Furthermore, in order to prevent the rotating gear disc from pressing against the bottom surface of the working chamber, a frustum block with a larger top and a smaller bottom is coaxially fixed to the center of the top surface of the rotating gear disc. The frustum block is embedded in the top wall of the working chamber, which can avoid friction between the rotating gear disc and the bottom surface of the working chamber.

[0009] Furthermore, in order to make the rotation of the driving sprocket more smooth, an auxiliary rolling roller is provided in the working chamber to support the bottom surface of the driving sprocket upward. The auxiliary rolling rollers are multiple and evenly spaced along the circumference of the driving sprocket. The axis of each auxiliary rolling roller remains perpendicular to the axis of the driving sprocket, which can avoid friction between the driving sprocket and the bottom surface of the working chamber.

[0010] Furthermore, a limiting guide rod is provided on the top surface of the adjustment seat, and the limiting guide rod is vertically upwardly penetrated into the fixing seat above the mounting groove, further ensuring that the adjustment seat moves vertically up and down.

[0011] Furthermore, a flexible fitting pad is attached to the bottom surface of the adjustment seat, and the bottom surface of the flexible fitting pad has a wavy structure, which can reduce the gap when the top of the adjustment seat is attached to the ground, so that the adjustment seat is more firmly fixed on the ground.

[0012] The advantage of the present invention is that the lifting end of the height adjustment part is driven to extend and retract by the driving part, thereby easily driving the adjustment seat to move upward or downward, changing the overall height of the fixed seat, and realizing the height adjustment of the assembled stairs composed of the stair body, the assembly platform and the fixed seat, solving the problem of insufficient height of the assembled stairs when installing between adjacent floors, avoiding deviation in the installation height of the assembled stairs, and ensuring its stability after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Figure 2 yes Figure 1 A longitudinal section of the middle portion of the middle fixed seat.

[0015] Figure 3 yes Figure 2 Exploded diagram. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] like Figure 1-3 As shown, the assembled staircase described in the utility model includes a staircase body 1 with an integrated structure that can be directly assembled. An assembly platform 2 is provided at the upper end of the staircase body 1, and a fixing seat 3 is provided at the lower end thereof. The assembly platform 2 is installed on the upper floor slab of the adjacent floor, and the fixing seat 3 is fixed on the lower floor slab of the adjacent floor, so that the staircase body 1 connected between the assembly platform 2 and the fixing seat 3 forms an assembled staircase between two adjacent floors.

[0018] In order to solve the problem of insufficient height of the entire prefabricated staircase when installed between adjacent floors, and to enable the prefabricated staircase to adjust its height to adapt to the floor height, a mounting groove 4 with an opening facing downward should be provided on the bottom surface of the fixed seat 3, and an adjustment seat 5 is provided in the mounting groove 4. A working cavity 6 is provided in the fixed seat 3 above the mounting groove 4, and a pair of height adjustment parts are provided in the working cavity 6. The height adjustment part has a lifting end connected to the adjustment seat 5 and driving it to move up and down. A driving part is provided in the working cavity 6 between the two height adjustment parts. The driving part is transmission-connected to the two height adjustment parts, and the driving part has an operating end embedded in the top surface of the fixed seat 3.

[0019] Specifically, the height adjustment part includes a through hole 7 vertically opened between the mounting groove 4 and the working chamber 6, a lifting sleeve 8 is inserted into the through hole 7, a positioning groove 9 is vertically opened from top to bottom on the wall of the through hole 7, and a positioning slider 10 is provided on the outer wall of the lifting sleeve 8 for sliding up and down along the positioning groove 9; in order to make the lifting sleeve 8 more stably lifted and lowered vertically, a plurality of positioning grooves 9 are evenly spaced along the circumference of the wall of the through hole 7, and at the same time, there are a plurality of positioning sliders 10 corresponding one to one to the positioning grooves 9, and are evenly distributed on the outer wall of the lifting sleeve 8. A rotating screw 11 is provided in the lifting sleeve 8. The axis of the rotating screw 11 is consistent with the axis of the lifting sleeve 8 and is coaxially screwed in the lifting sleeve 8; the upper end of the rotating screw 11 is coaxially fixedly connected to a rotating gear disk 12 located in the working chamber 6, and the rotating screw 11 is driven to rotate by the rotation of the rotating gear disk 12, and then under the screw connection cooperation between the rotating screw 11 and the lifting sleeve 8, when the axial position of the rotating screw 11 remains unchanged, the lifting sleeve 8 will move up and down along its own axis due to the blocking action of the positioning groove 9 and the positioning slider 10, thereby realizing the up and down telescopic adjustment function of the height adjustment part. At this time, the lower end of the lifting sleeve 8 is the lifting end of the entire height adjustment part. As long as the lower end of the lifting sleeve 8 is fixedly connected to the adjustment seat 5, the adjustment seat 5 can be driven to move up and down.

[0020] The driving part includes a driving gear disc 13 arranged in the working chamber 6. The driving gear disc 13 is located between the two height adjustment parts and is respectively engaged with the rotating gear discs 12 on the two height adjustment parts, so that the two rotating gear discs 12 can be driven to rotate synchronously in the same direction by the rotation of the driving gear disc 13; a rotating shaft 14 is coaxially fixedly connected to the center of the top surface of the driving gear disc 13, and a rotating head 15 is coaxially fixedly connected to the upper end of the rotating shaft 14. The rotating head 15 is embedded in the top surface of the fixed base 3, and its top surface is kept flush with the top surface of the fixed base 3. An inner hexagonal operating hole 16 is provided at the center of the top surface of the rotating head 15 for convenient insertion of a hexagonal wrench for screwing operation.

[0021] Furthermore, in order to prevent the rotating gear disc 12 from pressing against the bottom surface of the working chamber 6, a conical block 17 with a larger top and a smaller bottom can be coaxially fixed to the center of the top surface of each rotating gear disc 12. The conical block 17 is embedded in the top wall of the working chamber 6, so that the rotating gear disc 12 can be suspended in the working chamber 6 through the conical block 17, ensuring that there is a certain gap on the upper and lower sides of the rotating gear disc 12, avoiding friction between the rotating gear disc 12 and the bottom surface of the working chamber 6, and improving the service life of the rotating gear disc 12.

[0022] Furthermore, in order to make the driving sprocket 13 rotate more smoothly, an auxiliary rolling roller 18 can be provided on the bottom surface of the working chamber 6 to support the bottom surface of the driving sprocket 13 upward. The auxiliary rolling rollers 18 are arranged evenly at intervals along the circumference of the driving sprocket 13. The axis of each auxiliary rolling roller 18 is perpendicular to the axis of the driving sprocket 13, so that the axes of all the auxiliary rolling rollers 18 are arranged divergently, ensuring that the rolling direction of all the auxiliary rolling rollers 18 is just adapted to the rotation direction of the driving sprocket 13, and the hard friction between the driving sprocket 13 and the bottom surface of the working chamber 6 is converted into rolling friction between the driving sprocket 13 and the auxiliary rolling rollers 18, thereby improving the smoothness of the rotation of the driving sprocket 13 and increasing its service life.

[0023] Furthermore, in order to ensure that the adjustment seat 5 can translate up and down more stably, multiple sets of limit guide rods 19 can be set on the top surface of the adjustment seat 5. The limit guide rods 19 are vertically upward and passed through the fixed seat 3 above the installation groove 4. When the lifting sleeve 8 drives the adjustment seat 5 to translate up and down, the limit guiding effect of the limit guide rods 19 can further ensure that the adjustment seat 5 moves vertically up and down.

[0024] Furthermore, in order to make the adjustment seat 5 fit better with the lower floor of the adjacent floor, a layer of flexible fitting pad 20 can be fixed on the bottom surface of the adjustment seat 5. The flexible fitting pad 20 is a rubber pad or silicone pad with a wavy bottom structure, which can be tightly pressed on the lower floor, reducing the gap when the adjustment seat 5 is pressed against the ground, so that the adjustment seat 5 can be more firmly supported on the ground of the lower floor.

[0025] During installation, the assembly platform 2 is installed on the upper floor slab of the adjacent floor, the upper end of the stair body 1 is installed on the assembly platform 2, and the fixing seat 3 is installed at the lower end of the stair body 1. Then, the rotating head 15 of the driving part can be screwed according to the distance between the adjacent floors, so that the driving part drives the lifting sleeves 8 of the two height adjustment parts to move downward, and then drives the adjusting seat 5 to move downward horizontally, changing the overall height of the fixing seat 3, so that the flexible fitting pad 20 on the bottom surface of the adjusting seat 5 can be tightly attached to the lower floor slab of the adjacent floor, thereby realizing the height adjustment of the assembled stairs composed of the stair body 1, the assembly platform 2 and the fixing seat 3, solving the problem of insufficient height of the assembled stairs when installed between adjacent floors, avoiding deviation in the installation height of the assembled stairs, and ensuring its stability after installation.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] In addition, in this utility model, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

Claims

1. An assembled staircase, comprising a staircase body, an assembly platform provided at the upper end of the staircase body, and a fixing seat provided at the lower end thereof; characterized in that: A mounting groove opening facing downward is provided on the bottom surface of the fixing seat, an adjustment seat is provided in the mounting groove, a working cavity is provided in the fixing seat above the mounting groove, a pair of height adjustment parts are provided in the working cavity, the height adjustment parts have a lifting end for driving the adjustment seat to move up and down, a driving part is provided in the working cavity between the two height adjustment parts, the driving part is transmission-connected to the two height adjustment parts, and the driving part has an operating end embedded in the top surface of the fixing seat.

2. The assembled staircase according to claim 1, characterized in that: The height adjustment part includes a through-hole vertically opened between the mounting groove and the working chamber, a lifting sleeve is arranged in the through-hole, a positioning groove is opened from top to bottom on the wall of the through-hole, a positioning slider sliding along the positioning groove is arranged on the outer wall of the lifting sleeve, a rotating screw is adapted to be threaded in the lifting sleeve, and the upper end of the rotating screw is coaxially fixedly connected to a rotating gear disk located in the working chamber.

3. The assembled staircase according to claim 2, characterized in that: The positioning grooves are uniformly spaced along the circumferential direction of the hole wall of the through hole, and the positioning sliding blocks are multiple and correspond one to one with the positioning grooves and are evenly distributed on the outer wall of the lifting sleeve.

4. The assembled staircase according to claim 2, characterized in that: A frustum clamping block with a larger upper portion and a smaller lower portion is coaxially fixedly connected to the center of the top surface of the rotating gear disc, and the frustum clamping block is embedded in the top wall of the working cavity.

5. The assembled staircase according to claim 2, characterized in that: The driving part includes a driving gear plate arranged in the working chamber, and the driving gear plate is respectively engaged with the two rotating gear plates. The center of the top surface of the driving gear plate is coaxially fixed with a rotating shaft, and the upper end of the rotating shaft is coaxially fixed with a rotating head. The top surface of the rotating head is flush with the top surface of the fixed seat, and a hexagonal operating hole is opened on it.

6. The assembled staircase according to claim 5, characterized in that: An auxiliary rolling roller is provided in the working chamber to support the bottom surface of the driving gear disc upward. The auxiliary rolling rollers are arranged in a plurality and evenly spaced along the circumference of the driving gear disc, and the axis of each auxiliary rolling roller remains perpendicular to the axis of the driving gear disc.

7. The assembled staircase according to claim 1, characterized in that: A limit guide rod is provided on the top surface of the adjustment seat, and the limit guide rod is vertically upwardly penetrated into the fixing seat above the installation groove.

8. The assembled staircase according to claim 1, characterized in that: A flexible contact pad is attached to the bottom surface of the adjustment seat, and the bottom surface of the flexible contact pad is in a wavy structure.

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