CN219931751U - Precast concrete stair structure with adjustable - Google Patents

Abstract

The utility model discloses an adjustable precast concrete stair structure which comprises a bottom stair, a plurality of middle stairs and a top stair, wherein an adjusting mechanism which can enable the stairs to be adjusted to be convenient to transport, put or in a normal stair state is arranged on one side of the bottom stair, the middle stairs and the top stair in a linkage mode, a guide rail mechanism is arranged between adjacent contact surfaces of the bottom stair, the middle stairs and the top stair, and the adjusting mechanism and the guide rail mechanism synchronously move. The original precast concrete stair is added with the adjustable two states, one of the states is regular in shape, transportation, loading and placing can be facilitated, after the original precast concrete stair arrives at the site, the occupied area is relatively reduced, the site use space is increased, the uniformity of the construction site is kept, and the adjustable stair is in a step state and used for falling on a normal stair, and the structure is convenient to construct and simple to install.

Description

Precast concrete stair structure with adjustable

Technical Field

The utility model relates to the field of stairs, in particular to the field of concrete prefabricated member stairs.

Background

In modern construction, precast concrete stair component is a main building material, and precast concrete stair component mainly makes in the mill, and production efficiency is high, the quality is good, saves resource and energy, and traditional precast concrete stair component is because its volume is great, and the shape is irregular, leads to the transportation difficulty, and after arriving the job site, area is big, and put comparatively messy moreover, influences on site neatness.

Accordingly, in view of the above problems, there is a need for further improvement of the existing precast concrete stair elements.

Disclosure of Invention

The utility model aims to provide an adjustable precast concrete stair structure which can be adjusted to two states, one is in a state of adjusting a shape rule, can be conveniently placed by a transportation truck, relatively reduces the occupied area after arriving at a site, increases the space for site use, keeps the uniformity of a construction site, and the other is in a stair-shaped state, is used for normal stair falling, and is convenient to construct and simple in installation.

In order to achieve the above purpose, the present utility model adopts the following scheme:

the utility model provides a precast concrete stair structure with adjustable, includes bottom ladder, a plurality of middle ladder and top ladder, bottom ladder, middle ladder and top ladder one side interlock are provided with the adjustment mechanism that enables the ladder to adjust to convenient transportation, put state or normal stair state, be provided with guide rail mechanism between the adjacent contact surface of bottom ladder, a plurality of middle ladder and top ladder, adjustment mechanism with guide rail mechanism synchronous motion.

Further, a first open slot is formed in one side of the bottom step, a gear fixing shaft and a first fixing shaft are arranged in the first open slot, and an operation hole is formed in one side of the bottom step.

Further, a second open slot is formed in one side of the middle step, a second fixed shaft is arranged in the second open slot, and the number of the middle steps is configured according to actual needs.

Further, a third open slot is formed in one side of the top step, a third fixed shaft is arranged in the third open slot, and a self-locking mechanism capable of locking the adjusting mechanism after being unfolded is arranged on one side of the third open slot;

the self-locking mechanism comprises a hook lock locking shaft arranged on one side of the third opening groove, a rotating piece is hinged to the hook lock locking shaft, an arc hook lock is arranged at the tail end of the rotating piece, a top plate is arranged above the rotating piece, a pressing thimble is connected above the top plate, a first spring capable of resetting the pressing thimble is arranged between the pressing thimble and the top plate, and a second spring is arranged between the rotating piece and the upper side of the third opening groove.

Further, the adjustment mechanism is including setting up gear on the gear fixed axle, the meshing has the dwang on the gear, the dwang is including last dwang and lower dwang, lower dwang lower extreme is provided with driven tooth, driven tooth with gear looks meshing, upper end both sides are provided with square groove, it is provided with can to go up the dwang lower extreme the square strip that moves flexible in the square groove, one side be provided with the arc pit that the cooperation of circular arc hook phase lock carries out the auto-lock, the dwang middle part is provided with the keyway, second fixed axle, third fixed axle pass the keyway.

Further, the guide rail mechanism comprises a guide rail and a sliding block which are arranged between two adjacent ladder contact surfaces.

In summary, compared with the prior art, the utility model has the following beneficial effects:

the utility model solves the defects of the existing precast concrete stairway, and has the advantages that the added precast concrete stairway can be adjusted to be in two states, one of the states with regular adjusting shape can be convenient for transportation and loading and placement, the occupied area is relatively reduced after the precast concrete stairway arrives at the site, the field using space is increased, the uniformity of the construction site is kept, the precast concrete stairway is adjusted to be in a step state, and the precast concrete stairway is used for falling on a normal stairway, is convenient for construction and has a simple structure for installation.

Drawings

FIG. 1 is a partial cross-sectional view of the present utility model;

FIG. 2 is a perspective view of a second embodiment of the present utility model;

FIG. 3 is a top plan view of a second embodiment of the present utility model;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a perspective view of an embodiment of the present utility model;

FIG. 6 is a middle cross-sectional view of a form of the present utility model;

FIG. 7 is a cross-sectional view of the track mechanism 5 of the present utility model;

fig. 8 is a partial enlarged view at fig. 4B.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-8, an adjustable precast concrete stairway structure, comprising: including bottom ladder 1, a plurality of middle ladder 2 and top ladder 3, bottom ladder 1, middle ladder 2 and 3 one side interlock in top ladder are provided with the adjustment mechanism 4 that enables the ladder to adjust to convenient transportation, put state or normal stair state, be provided with guide rail mechanism 5 between the adjacent contact surface of bottom ladder 1, a plurality of middle ladder 2 and top ladder 3, adjustment mechanism 4 with guide rail mechanism 5 synchronous motion.

The working flow is as follows:

the precast concrete stair is divided into two states, namely a transportation state and a current placement state, wherein one is in a normal stair state, when the precast concrete stair is in the transportation state and the current placement state, the contact surfaces of the bottom ladder 1, the middle ladder 2 and the top ladder 3 are overlapped to form a regular cuboid shape, so that the precast concrete stair is convenient to transport and place, and at the moment, the adjusting mechanism 4 is in a vertical state; when the precast concrete building needs to be installed, the bottom ladder 1 is fixed, the tool is utilized to rotate the section mechanism 4, the adjusting mechanism 4 rotates and simultaneously pulls the middle ladder 2 and the top ladder 3 to move, the guide rail mechanism 5 ensures horizontal movement between the ladder and limits the rotating range of the adjusting mechanism 4, and therefore the precast concrete building is used in a common stair shape.

The utility model discloses a gear fixing device, which is characterized in that a first open groove 101 is formed in one side of a bottom step 1, a gear fixing shaft 102 and a first fixing shaft 103 are arranged in the first open groove 101, and an operation hole 104 is formed in one side of the bottom step 1.

The rotation mechanism is operated by rotating the gear 401 in the adjustment mechanism 4 with a tool through the work hole 104.

In the utility model, a second open slot 201 is arranged on one side of the intermediate step 2, a second fixed shaft 202 is arranged in the second open slot 201, and the number of the intermediate steps 2 is configured according to actual needs.

The utility model provides a third open slot 301 is arranged on one side of the top step 3, a third fixed shaft 302 is arranged in the third open slot 301, and a self-locking mechanism 303 which can lock the adjusting mechanism 4 after being unfolded is arranged on one side of the third open slot 301;

the self-locking mechanism 303 comprises a hook lock locking shaft 3011 arranged at one side of the third opening groove 301, a rotating member 3012 is hinged on the hook lock locking shaft 3011, an arc hook lock 3013 is arranged at the tail end of the rotating member 3012, a top plate 3014 is arranged above the rotating member 3012, a pressing thimble 3015 is connected above the top plate 3014, a first spring 3016 capable of resetting the pressing thimble 3015 is arranged between the pressing thimble 3015 and the top plate 3014, and a second spring 3017 is arranged between the rotating member 3012 and the upper side of the third opening groove 301.

When the rotating mechanism 4 rotates to a certain position, the arc hook lock 3013 is clamped into the arc pit 4032 to perform self-locking through the upward pulling force given by the second spring 3017, the rotating mechanism 4 cannot rotate, the pressing thimble 3015 is pressed down to enable the top plate 3014 to rotate downwards, and the arc hook lock 3013 is separated from the arc pit 4032 to be unlocked.

The adjusting mechanism 4 of the present utility model comprises a gear 401 disposed on the gear fixing shaft 102, a rotating rod 402 is meshed on the gear 401, the rotating rod 402 comprises an upper rotating rod 403 and a lower rotating rod 404, a driven tooth 4041 is disposed at the lower end of the lower rotating rod 404, the driven tooth 4041 is meshed with the gear 401, square grooves 4042 are disposed at two sides of the upper end, a square bar 4031 capable of moving and retracting in the square groove 4042 is disposed at the lower end of the upper rotating rod 403, an arc-shaped pit 4032 matched with the arc-shaped hook lock 3013 for self-locking is disposed at one side, a key groove 405 is disposed in the middle of the rotating rod 402, and the second fixing shaft 202 and the third fixing shaft 302 pass through the key groove 405.

When the square bar 4031 is inserted into the square groove 4042 in a cuboid state, and is turned into a stepped shape, the gear 401 is rotated by an external force, the rotating rod 402 rotates along with the square bar 4031, and the middle step 2 and the top step 3 move along with the rotating rod 402 as the second fixing shaft 202 and the third fixing shaft 302 pass through the key groove 405, in the moving process, the upper rotating rod 403 rotates and moves away from the lower rotating rod 404 according to a movement track, and the square bar 4031 gradually stretches out of the square groove 4042 until the rotation stops.

The guide rail mechanism 5 of the present utility model includes a guide rail 501 and a slider 502 disposed between adjacent two step contact surfaces.

The limit of the guide rail 501 and the slider 502 ensures horizontal movement between steps, and also determines the rotation width of the rotation mechanism 4.

While there has been shown and described what is at present considered to be the fundamental principles and the main features of the utility model and the advantages thereof, it will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, but is described in the foregoing description merely illustrates the principles of the utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model as hereinafter claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. An adjustable precast concrete stair structure, its characterized in that: including bottom ladder (1), a plurality of middle ladder (2) and top ladder (3), bottom ladder (1), middle ladder (2) and top ladder (3) one side interlock are provided with adjustment mechanism (4) that enable the ladder to adjust to convenient transportation, put state or normal stair state, be provided with guide rail mechanism (5) between the adjacent contact surface of bottom ladder (1), a plurality of middle ladder (2) and top ladder (3), adjustment mechanism (4) with guide rail mechanism (5) synchronous motion.

2. An adjustable precast concrete stairway structure according to claim 1, characterised in that: a first open slot (101) is formed in one side of the bottom step (1), a gear fixed shaft (102) and a first fixed shaft (103) are arranged in the first open slot (101), and an operation hole (104) is formed in one side of the bottom step (1).

3. An adjustable precast concrete stairway structure according to claim 2, characterised in that: a second open slot (201) is formed in one side of the middle step (2), a second fixed shaft (202) is arranged in the second open slot (201), and the number of the middle steps (2) is configured according to actual needs.

4. An adjustable precast concrete stairway structure according to claim 3, characterised in that: a third open slot (301) is formed in one side of the top step (3), a third fixed shaft (302) is arranged in the third open slot (301), and a self-locking mechanism (303) capable of locking the adjusting mechanism (4) after being unfolded is arranged on one side of the third open slot (301);

the self-locking mechanism (303) comprises a hook locking shaft (3011) arranged on one side of the third opening groove (301), a rotating part (3012) is hinged to the hook locking shaft (3011), an arc hook lock (3013) is arranged at the tail end of the rotating part (3012), a top plate (3014) is arranged above the rotating part (3012), a pressing thimble (3015) is connected above the top plate (3014), a first spring (3016) capable of resetting the pressing thimble (3015) is arranged between the pressing thimble (3015) and the top plate (3014), and a second spring (3017) is arranged between the rotating part (3012) and the upper side of the third opening groove (301).

5. An adjustable precast concrete stairway structure according to claim 4, characterised in that: the adjusting mechanism (4) comprises a gear (401) arranged on the gear fixing shaft (102), a rotating rod (402) is meshed on the gear (401), the rotating rod (402) comprises an upper rotating rod (403) and a lower rotating rod (404), driven teeth (4041) are arranged at the lower end of the lower rotating rod (404), the driven teeth (4041) are meshed with the gear (401), square grooves (4042) are formed in two sides of the upper end of the driven teeth, square strips (4031) which can move in the square grooves (4042) in a telescopic mode are arranged at the lower end of the upper rotating rod (403), arc-shaped pits (4032) which are matched with the arc-shaped hook locks (3013) for self locking are formed in one side of the upper rotating rod, key grooves (405) are formed in the middle of the rotating rod (402), and the second fixing shaft (202) and the third fixing shaft (302) penetrate through the key grooves (405).

6. An adjustable precast concrete stairway structure according to claim 5, characterised in that: the guide rail mechanism (5) comprises a guide rail (501) and a sliding block (502) which are arranged between two adjacent ladder contact surfaces.