A kind of steel ladder for fabricated stair construction

Abstract

The application provides a steel climbing ladder for fabricated stair construction, which comprises a cast-in-place slab and a prefabricated stair, and the cast-in-place slab comprises a climbing ladder assembly, and the climbing ladder assembly comprises an inclined plate arranged on the cast-in-place slab. The application facilitates the installation of a steel stair, changes the original welding installation mode into a detachable structure, greatly simplifies the installation steps of the steel stair, saves the installation time, greatly facilitates the staff during transportation or installation and saves certain time, the disassembled stair does not occupy too much space during transportation, thereby facilitating the transportation of multiple stairs and improving the transportation efficiency, in addition, the structure can assist the construction personnel in conveying building materials by a trolley, facilitates the pulling of the trolley to a construction area, and compared with the existing layered stair, the stair with the connecting structure is more convenient for the construction personnel to use.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of steel cat ladder for fabricated stair construction. BACKGROUND

[0002] With the rapid development of China's economy and urban infrastructure, the demand for various new building materials is also increasing, as the subsidiary facilities of urban inspection well, for a long time, cat ladder material has been made of steel bar.

[0003] At present, the common cat ladder structure is integral type, including ladder beam, footboard and guardrail, etc., that is, so-called prefabricated stair, it is installed in first floor, for staff to use, but this prefabricated stair has certain limitation when using, for example, when installing, its volume is large, can only be installed in first floor or second floor, when building three or four floors, with the increase of floor, prefabricated stair is more time-consuming and troublesome in installation, and prefabricated stair is also inconvenient to transport because of its too large volume when transporting, so whether it is installation or transportation, it is extremely inconvenient, at the same time, the connection of prefabricated stair is generally fixed by welding connection, which causes prefabricated stair to be unable to disassemble, furthermore, when disassembling prefabricated stair, because of large workload, there may be certain risk, construction accident may occur, causing delay in construction period. SUMMARY

[0004] The present application provides a kind of steel cat ladder for fabricated stair construction, which can effectively solve the above problems.

[0005] The present application is implemented as follows:

[0006] A kind of steel cat ladder for fabricated stair construction, including cast-in-place slab and prefabricated stair, the cast-in-place slab includes a cat ladder assembly,

[0007] The cat ladder assembly includes an inclined plate arranged on the cast-in-place slab and fixedly installed on the cast-in-place slab by first bolts, the other end of the inclined plate is provided with a bolt fixing piece and is fixedly connected with another cast-in-place slab, the two sides of the inclined plate are both fixedly provided with a guardrail, the inner side of the inclined plate is fixedly connected with at least four groups of lifting rings for hoisting with large equipment, the bottom of the inclined plate is fixedly provided with a stand, one end of the stand is provided with a second bolt and connected with the inclined plate, square steel is fixedly arranged on two groups of the stand, and a footboard is fixedly arranged between two groups of the inclined plate.

[0008] As a further improvement, a connecting assembly is arranged between every two groups of the footboard, the connecting assembly includes a first plug, a first folding plate, a second folding plate and a second plug, the first plug, the first folding plate, the second folding plate and the second plug are all connected by hinges, and the first plug and the second plug are both provided with a plug hole for connecting with a rod.

[0009] As a further improvement, the plug-in plate is integrally formed on the pedal, a recess is formed in the middle of the pedal, and a rod is installed in the recess, facilitating the connection with the first plug-in block and the second plug-in block.

[0010] As a further improvement, a plurality of groups of pivot seats are fixedly arranged on the inclined plate at equal angles, at least two groups of plug-in slots are formed in the pivot seats for plug-in connection with the plug-in plate, and third bolts are fixedly arranged on the side surfaces of the pivot seats for connection and fixation with the plug-in plate.

[0011] As a further improvement, an abutting frame is fixedly arranged on the side surface of the pivot seat between the two groups of third bolts, which improves the support strength of the two ends of the pedal.

[0012] As a further improvement, at least two groups of parallel vertical plates are fixedly arranged on the lower end surface of the pedal, a bolt rod is rotatably arranged at one end of each of the two groups of vertical plates, a fixing cap is fixedly arranged at one end of each of the two groups of bolt rods, and an abutting inclined plate is rotatably arranged at the other end of each of the two groups of bolt rods for contact with the bottom surface of the first folding plate and the second folding plate.

[0013] As a further improvement, two groups of the lifting rings are fixedly installed near the left side rail at one fourth of the position, and the other two groups of the lifting rings are fixedly installed near the right side rail at one third of the position, which facilitates hoisting by a crane and improves stability.

[0014] As a further improvement, a plurality of bolt holes are further arranged on the pivot seat and used for connection with the third bolts, and the pivot seat is connected with the third bolts through different bolt holes, and the angle can be adjusted.

[0015] As a further improvement, the included angle between the first folding plate, the second folding plate and the pedal is 45-60 degrees.

[0016] The beneficial effects of the present application are:

[0017] (1) In the present application, the components of the integral steel stair and the integral rail are all connected by welding, forming firm and effective connections between the components, and the lug plates are arranged at the lower end of the ladder beam of the integral steel stair, which are combined with the reserved bolts of the cast-in-place floor by means of nuts, and the lug plates are arranged at the upper end of the pedal of the integral steel stair, which are combined with the aluminum mold latches, improving the reliability and stability of the steel stair. The lug plates are respectively welded at the upper two end ladder beams and the columns of the integral steel stair, and the adjustable jacks are connected by bolts, simplifying the installation steps of the steel stair. Furthermore, the lifting rings are arranged at one fourth of the upper part of the left side ladder beam and one third of the lower part of the right side ladder beam, facilitating quick hoisting and saving installation time.

[0018] (2) The present application is designed to be detachable and foldable, which can greatly facilitate the staff and save time during transportation or installation, and the detached stairs will not occupy too much space during transportation, thereby facilitating the transportation of multiple stairs and improving the transportation efficiency.

[0019] (3) The first folding plate and the second folding plate are arranged, which can assist the construction personnel when conveying building materials by the trolley, facilitate the trolley to be pulled to the construction area, and compared with the existing layered stairs, the stairs with the connecting structure are more convenient for the construction personnel to use.

[0020] (4) The pivot seat is arranged, which can change the angle of the pedal, the first folding plate and the second folding plate, so that the slope formed by the first folding plate and the second folding plate is lowered or raised, thereby facilitating the upward or downward movement of the trolley. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and other related drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is the front view of the present application.

[0023] Figure 2 is the three-dimensional view of the inclined plate of the present application.

[0024] Figure 3 is the exploded view of the pedal and the connecting assembly of the present application.

[0025] Figure 4 is the structure diagram of the pivot seat of the present application.

[0026] Figure 5 is the bottom view of the inclined plate of the present application.

[0027] Figure 6 is the enlarged view of A of the present application.

[0028] Figure 7 is the use state diagram of the bolt rod of the present application.

[0029] Figure 8 is the folding state diagram of the pedal of the present application.

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] 1, cast-in-place slab; 2, inclined plate; 3, first bolt; 4, bolt fixing piece; 5, railing; 6, lifting ring; 7, stand; 8, second bolt; 9, horizontal steel; 10, prefabricated stair; 11, step;

[0032] 12, connecting assembly; 120, first plug; 121, socket; 122, first folding plate; 123, second folding plate; 124, second plug;

[0033] 13, plug plate; 14, groove; 15, rod; 16, pivot seat; 17, plug slot; 18, third bolt; 19, abutting frame; 20, vertical plate; 21, bolt rod; 22, fixing cap; 23, abutting inclined plate. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0035] In the description of the present application, the terms "first", "second" are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0036] Reference Figures 1-8 As shown in the drawings, a steel ladder for prefabricated stair construction, comprising a cast-in-place slab 1 and a prefabricated stair 10, the cast-in-place slab 1 comprising a ladder assembly.

[0037] The ladder assembly comprises an inclined plate 2 arranged on the cast-in-place plate 1 and fixedly installed on the cast-in-place plate 1 by the first bolt 3. Specifically, an ear plate is further arranged on the cast-in-place plate 1, and the inclined plate 2 is in contact with the ear plate, and then the inclined plate 2 is fixedly installed on the ear plate of the cast-in-place plate 1 by the reserved first bolt 3, and a sleeve and an adjusting seat are further sleeved on the first bolt 3, and the sleeve is arranged above the adjusting seat. The other end of the inclined plate 2 is provided with a latch fixing part 4 and is fixedly connected with another cast-in-place plate 1. Specifically, the other cast-in-place plate 1 is also provided with an ear plate, and the ear plate is connected with the latch fixing part 4, so as to fix the inclined plate 2, and the latch fixing part 4 is a common fixing structure in engineering, which will not be described in detail here. The two sides of the inclined plate 2 are fixedly provided with railings 5. Specifically, the railings 5 are fixedly installed on the inclined plate 2 by welding. The inner sides of the inclined plate 2 are fixedly connected with at least four groups of lifting rings 6 for hoisting large equipment. Specifically, the annular opening of the lifting ring 6 is also provided with a bayonet (not shown in the figure), which facilitates the clamping of the steel rope in the hoisting equipment with the bayonet, so as to achieve the effect of limiting and fixing, avoid the sliding of the steel rope, prevent the left and right shaking of the inclined plate 2 and the like, and improve the safety operation. The bottom of the inclined plate 2 is fixedly provided with a stand 7, one end of the stand 7 is provided with a second bolt 8 and is connected with the inclined plate 2, two groups of square steels 9 are fixedly arranged on the two groups of stands 7, and a step 11 is fixedly arranged between the two groups of inclined plates 2.

[0038] Specifically, the stand 7 is fixed with the inclined plate 2 in a parallel manner by the second bolt 8 and the ear plate (refer to Figure 1 , which is not obvious), the ear plate is welded with the stand 7, and the second bolt 8 passes through the ear plate and is connected with the inclined plate, and the other end of the stand 7 is connected with the prefabricated stair 10, thereby supporting the inclined plate 2 and improving the stability thereof. In addition, one end of the square steel 9 is arranged between the two groups of steps 11 and is fixed by the existing bolt or other fixing components without welding, and the structure composed of the square steel 9 and the stand 7 is like a support. When the steel stair composed of the inclined plate 2 and the step 11 is subjected to downward pressure, the pressure can be transmitted to the support and then transmitted to the prefabricated stair 10 by the other end of the stand 7, so that the force can be well distributed and the stability of the steel stair can be improved.

[0039] Among them, one group of lifting rings 6 is fixedly installed at a position close to one quarter of the left railing 5, and the other group of lifting rings 6 is fixedly installed at a position close to one third of the right railing 5, and the steel rope forms a conical shape, so as to facilitate the gravity center of the steel rope on the crane to be uniformly concentrated on the hook on the crane, improve the stability of the steel stair during hoisting, and prevent the steel stair from shaking.

[0040] A connecting assembly 12 is arranged between every two groups of the pedals 11, and the connecting assembly 12 comprises a first plug block 120, a first folding plate 122, a second folding plate 123 and a second plug block 124, which are connected by hinges. Specifically, the included angle between the first folding plate 122, the second folding plate 123 and the pedal 11 is 45-60 degrees. The first plug block 120 and the second plug block 124 are both provided with a plug hole 121 for connecting with the rod 15, the pedal 11 is integrally provided with a plug plate 13, the middle part of the pedal 11 is provided with a recess 14 for mounting the rod 15, which is beneficial to the connection with the first plug block 120 and the second plug block 124. The inclined plate 2 is fixedly provided with a plurality of groups of pivot seats 16 arranged at equal angles, the pivot seat 16 is provided with at least two groups of plug slots 17 for plug connection with the plug plate 13, the side surface of the pivot seat 16 is fixedly provided with a third bolt 18 for connection and fixation with the plug plate 13, the side surface of the pivot seat 16 is fixedly provided with an abutting frame 19 between the two groups of third bolts 18, which is beneficial to improve the support strength of the two ends of the pedal 11, the pivot seat 16 is further provided with a plurality of bolt holes (not shown in the figure) for connection with the third bolt 18, and the pivot seat 16 is connected with the third bolt 18 through different bolt holes, so that the angle can be adjusted. The lower end surface of the pedal 11 is welded with at least two groups of parallel vertical plates 20, one end of the two groups of vertical plates 20 is rotatably provided with a bolt rod 21, one end of the two groups of bolt rods 21 is fixedly provided with a fixed cap 22, and the other end of the two groups of bolt rods 21 is rotatably provided with an abutting inclined plate 23 for contacting the bottom surface of the first folding plate 122 and the second folding plate 123.

[0041] When installing, the tread plate 11 is inserted into the slot 17 until the two end faces of the tread plate 11 contact the upper end face of the pivot seat 16, and then the pivot seat 16 and the tread plate 11 are fixed on the corresponding bolt holes (not shown in the figure) by the third bolts 18, at this time, one end of the abutting frame 19 contacts the tread plate 11 and supports the two ends of the tread plate 11, increasing the contact area of the two ends of the tread plate 11, thereby improving the stress strength of the tread plate 11 and avoiding the bending of the two ends of the tread plate 11. After the above steps are completed, the tread plate 11 is arranged in a stepped manner upwards, and the structure formed by the first folding plate 122 and the second folding plate 123 between every two groups of tread plates 11 forms a certain inclination angle, then the bolt rod 21 on the vertical plate 20 is rotated, and the abutting inclined plate 23 connected with the other end of the bolt rod 21 (threaded connection) can move along with the rotation of the bolt rod 21 until one side of the abutting inclined plate 23 contacts the bottom surface of the first folding plate 122 and the second folding plate 123. Furthermore, the abutting inclined plate 23 also corresponds to the inclination angle of the first folding plate 122 and the second folding plate 123, which is beneficial to the adhesion of the abutting inclined plate 23 and the bottom surface of the two plates, thereby avoiding the bending of the first folding plate 122 and the second folding plate 123 when the trolley is pressed towards the two plates, so as to play a certain supporting role. Further, when the pivot seat 16 is installed in bolt holes of different heights, the inclination angle of the first folding plate 122 and the second folding plate 123 will also change, and the contact position of the abutting inclined plate 23 with the bottom surface of the two plates will also move downward or upward (refer to Figure 7 ), but both can play a certain supporting effect, so as to facilitate the construction personnel to move the trolley to the required area by contacting the inclined plate formed by the first folding plate 122 and the second folding plate 123 with the moving wheels on the trolley. When disassembling, the third bolts 18 are loosened, the tread plate 11 is removed from the pivot seat 16, and then the first folding plate 122 and the second folding plate 123 are folded by the hinge (refer to Figure 8 ), forming a rolled state. When the first folding plate 122 and the second folding plate 123 are folded, the two inclined plates 2 can also be separated, so that the tread plate 11 and other structures are divided into two parts, so that the tread plate 11 and other structures are easy to store during transportation.

[0042] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fabricated stair construction steel ladder comprising a cast-in-place slab (1) and a prefabricated stair (10), characterized in that, The cast-in-place slab (1) comprises a ladder assembly, The ladder assembly comprises an inclined plate (2) arranged on the cast-in-place slab (1) and fixedly installed on the cast-in-place slab (1) through a first bolt (3), one end of the inclined plate (2) is provided with a bolt fixing part (4) and is fixedly connected with another cast-in-place slab (1), both sides of the inclined plate (2) are fixedly provided with railings (5), the inner side of the inclined plate (2) is fixedly connected with at least four groups of lifting eyes (6) for hoisting large equipment, the bottom of the inclined plate (2) is fixedly provided with a stand (7), one end of the stand (7) is provided with a second bolt (8) and is connected with the inclined plate (2), square steel (9) is fixedly arranged on both groups of stands (7), and a stepping plate (11) is fixedly arranged between the two groups of inclined plates (2). A connecting assembly (12) is arranged between every two groups of stepping plates (11), the connecting assembly (12) comprises a first plug block (120), a first folding plate (122), a second folding plate (123) and a second plug block (124), the first plug block (120), the first folding plate (122), the second folding plate (123) and the second plug block (124) are connected through hinges, the first plug block (120) and the second plug block (124) are provided with plug holes (121) for connecting with a rod (15), the stepping plate (11) is integrally provided with a plug plate (13), a recess (14) is formed in the middle of the stepping plate (11) and is used for mounting the rod (15), and the first plug block (120) and the second plug block (124) are connected; A plurality of groups of pivot connection seats (16) are fixedly arranged on the inclined plate (2) at equal angles, at least two groups of plug grooves (17) for plugging with the plug plate (13) are formed in the pivot connection seat (16), a third bolt (18) is fixedly arranged on the side surface of the pivot connection seat (16) and is used for connecting and fixing the plug plate (13), a plurality of bolt holes are further arranged on the pivot connection seat (16) and are used for connecting with the third bolt (18), and the pivot connection seat (16) is connected with the third bolt (18) through different bolt holes, so that the angle can be adjusted.

2. A steel crawl ladder for fabricated stair construction according to claim 1, characterized in that The side surface of the pivot connection seat (16) is fixedly provided with an abutting frame (19) between the two groups of third bolts (18), so that the supporting strength of both ends of the stepping plate (11) is improved.

3. The steel crawl ladder for fabricated stair construction of claim 1, wherein, At least two groups of vertical plates (20) are fixedly arranged on the lower end surface of the stepping plate (11), a bolt rod (21) is rotatably arranged at one end of the two groups of vertical plates (20), a fixing cap (22) is fixedly arranged at one end of the two groups of bolt rods (21), and an abutting inclined plate (23) used for contacting the bottom surfaces of the first folding plate (122) and the second folding plate (123) is rotatably arranged at the other end of the two groups of bolt rods (21).

4. The steel crawl ladder for fabricated stair construction of claim 1, wherein, Two groups of the lifting rings (6) are fixedly installed at positions close to the left side rail (5) quarter, and the other two groups of the lifting rings (6) are fixedly installed at positions close to the right side rail (5) third, so as to facilitate hoisting by a crane and improve stability.

5. The construction steel ladder for fabricated stairs according to claim 1, characterized in that, The included angle formed between the first folding plate (122), the second folding plate (123) and the pedal (11) is 45-60 degrees.

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