Adjustable bottom-holding protection platform for bridge construction

Abstract

The utility model discloses an adjustable bottom protection platform for bridge construction, which comprises a bottom frame and a hanging bracket, a sliding chute is arranged on a longitudinal rod of the bottom frame, and a tooth surface is arranged on the lower surface of the longitudinal rod where an adjusting section is positioned; the hanging bracket comprises a cross beam, hanging rods and sleeves, the bottom of each hanging rod is connected with one sleeve, a sliding block is arranged on the left side face or the right side face in each sleeve, and a protruding strip is arranged above the bottom face of each sleeve. The sleeves are arranged on the corresponding longitudinal rods in a sleeving mode, the sliding block on each sleeve is connected with the sliding groove in the corresponding longitudinal rod in a matched mode, and the protruding strips of the sleeves are meshed with the tooth faces of the lower surfaces of the longitudinal rods. Two hanging brackets of the bottom-wrapping protection platform are connected with longitudinal rods of a bottom frame through sleeves below the hanging brackets, the sleeves are arranged on the longitudinal rods in a sleeving mode, and the sleeves can move on adjusting sections of the longitudinal rods of the bottom frame; the width between the hanging brackets is easy and convenient to adjust.

Description

Technical Field

[0001] This utility model relates to a bridge construction protection device, specifically an adjustable bottom protection platform for bridge construction. Background Technology

[0002] The bottom protection device in bridge construction is an important protective facility used to ensure the safety of construction personnel, equipment and passage below. It is installed at the bottom of the bridge or below the suspended work area to prevent falls from heights.

[0003] Common types of safety nets include suspended safety nets / fall arrestors, steel safety platforms, and mobile protective frames. Among them, steel safety platforms consist of steel supports, steel plates, or gratings, forming a rigid protective layer that can withstand large loads.

[0004] On November 29, 2023, the applicant applied for a bridge construction bottom protection device, including a base frame. Two side pull frames are symmetrically arranged on the top of the base frame. The bottom of each side pull frame is detachably and fixedly connected to the base frame. Hanging rods are evenly arranged on the inner side of the top of each side pull frame, and support plates are evenly arranged on the inner side of the base frame. The tops of both side pull frames are hung on the sides of a single box girder or the top of the outer sides of a double box girder via hanging rods, thus suspending the base frame below the box girder to prevent objects from falling during the construction phase. The bottom of the side pull frames is detachably and fixedly connected to the base frame. In practical applications, if the distance between the two side pull frames needs to be readjusted, several fixing holes can be drilled on the base frame. After determining the relative positions of the two side pull frames according to the width of the box girder, they can be fixed to the base frame with bolts.

[0005] During the course of the work, the applicant developed a structure that allows for more convenient and rapid adjustment of the distance between the two side pull frames, and applied for this utility model application for the solution. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an adjustable bottom protection platform for bridge construction that has a stable structure and can be quickly adjusted according to the width of the box girder.

[0007] The technical solution for achieving the purpose of this utility model is an adjustable bottom protection platform for bridge construction, including a base frame and a hanger. There are two hangers, which are connected to the left and right sides of the base frame respectively. The base frame includes a frame and support bars. The support bars are set inside the frame, and the frame is composed of two longitudinal bars and two transverse bars.

[0008] The longitudinal bar includes a left adjustment section and a right adjustment section. A sliding groove is provided on the longitudinal bar where the adjustment section is located. The sliding groove is located on the front or rear side of the longitudinal bar. A toothed surface is also provided on the lower surface of the longitudinal bar where the adjustment section is located.

[0009] The hanger includes a crossbeam, a hanger rod, and a sleeve. There are two hanger rods, which are respectively set on the lower sides of the crossbeam. The bottom of each hanger rod is connected to a sleeve. A slider is set on the left or right side inside the sleeve, and a protrusion is set on the top of the bottom surface of the sleeve.

[0010] The sleeve is fitted onto the corresponding longitudinal rod, and the slider on each sleeve is connected to the groove on the corresponding longitudinal rod. The protrusion of the sleeve meshes with the toothed surface on the lower surface of the longitudinal rod.

[0011] A row of fixing holes is provided above or below the groove of the longitudinal bar.

[0012] Correspondingly, a fixing through hole is provided on the sleeve. After the sleeve and the longitudinal rod are positioned, the hole of the sleeve and the fixing hole are coaxial, and the sleeve and the longitudinal rod are further fixed with bolts (such as wing bolts).

[0013] The support strip includes vertical support strips located on the left and right sides inside the frame and a horizontal support strip located in the middle. The vertical support strips are parallel to the vertical rods, and the horizontal support strips are parallel to the horizontal rods. The horizontal support strips are arranged between the two vertical rods. One end of the vertical support strip is connected to the horizontal rod, and the other end is connected to the nearest horizontal support strip.

[0014] The upper surfaces of the longitudinal and transverse support bars are on the same plane as the upper surface of the frame, or the upper surfaces of the longitudinal and transverse support bars are lower than the upper surface of the frame.

[0015] The left adjustment section of the longitudinal bar is located to the left of the leftmost horizontal support bar, and the right adjustment section is located to the right of the rightmost horizontal support bar.

[0016] The vertical dimension of the sleeve cavity of the hanger is larger than the vertical dimension of the longitudinal bar of the base frame.

[0017] This utility model has positive effects:

[0018] (1) The two hangers of the bottom protection platform of this utility model are connected to the longitudinal rod of the base frame through the sleeve below. The sleeve is fitted on the longitudinal rod and the sleeve can be moved in the adjustment section of the longitudinal rod of the base frame. After the hangers are hoisted and fixed to the box beam, the protrusion inside the sleeve engages with the tooth surface on the lower surface of the longitudinal rod of the base frame, limiting the position of the two hangers on the base frame.

[0019] (2) In order to allow the sleeve to move in the adjustment section of the base frame longitudinal bar, the present invention arranges the support bars inside the base frame, and sets the middle transverse support bar and the longitudinal support bars at both ends. The longitudinal support bar is parallel to the longitudinal bar of the base frame, and the transverse support bar is parallel to the horizontal bar. While ensuring the load is borne, space is left at both ends for the sleeve to move.

[0020] (3) In this utility model, the surface of the support strip of the base frame is lower than the surface of the frame, that is, the support strip and the frame form a concave structure. A protective plate or a grid plate is placed in the concave part, and then the protective plate or grid plate is mechanically fixed to the support strip. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a structural diagram of the base frame.

[0023] Figure 3 This is a schematic diagram of the hanger structure.

[0024] Figure 4 This is a schematic diagram of the adjustment of this utility model.

[0025] The markings in the above figures are as follows:

[0026] Base frame 1, longitudinal bar 1-1, transverse bar 1-2, longitudinal support bar 1-3, transverse support bar 1-4, sliding groove 1-5, toothed surface 1-6, fixing hole 1-7;

[0027] Hanger 2, crossbeam 2-1, hanger rod 2-2, sleeve 2-3, slider 2-4, convex strip 2-5, hanging rod 2-6. Detailed Implementation

[0028] The following describes some of the possible embodiments of this utility model, intended to provide a basic understanding of the utility model, and is not intended to identify the key or decisive elements of the utility model or limit the scope of protection to be provided. It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose other interchangeable implementations without changing the essential spirit of the utility model. Therefore, the following specific embodiments are merely illustrative examples of the technical solution of this utility model and should not be considered as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0029] In the description of the embodiments of this application, the technical terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0030] (Example 1)

[0031] See Figures 1 to 3The adjustable bottom protection platform for bridge construction in this embodiment includes a base frame 1 and a hanger 2. There are two hangers 2, which are connected to the left and right sides of the base frame 1 respectively.

[0032] See Figure 2 The base frame 1 includes a frame and a support strip. The frame is rectangular and the support strip is set inside the frame.

[0033] The frame consists of two vertical bars 1-1 and two horizontal bars 1-2. The vertical bars 1-1 are set along the X direction, and the horizontal bars 1-2 are set along the Y direction. The length of the vertical bars 1-1 is greater than the length of the horizontal bars 1-2.

[0034] The support bars include longitudinal support bars 1-3 located on the left and right sides inside the frame and a transverse support bar 1-4 located in the middle. The longitudinal support bars 1-3 are parallel to the longitudinal bar 1-1, and the transverse support bars 1-4 are parallel to the transverse bar 1-2.

[0035] The two ends of the horizontal support bar 1-4 are connected to the two longitudinal bars 1-1 respectively, that is, the horizontal support bar 1-4 is set between the two longitudinal bars 1-1. The number of horizontal support bars 1-4 is ≥2, and the number and spacing are set according to the width of the box girder. The wider the box girder, the longer the longitudinal bars 1-1, and the more horizontal support bars 1-4 there are.

[0036] One end of the longitudinal support bar 1-3 is connected to the crossbar 1-2, and the other end is connected to the nearest crossbar 1-4.

[0037] The upper surfaces of all longitudinal support bars 1-3 and transverse support bars 1-4 are on the same plane; the upper surfaces of longitudinal support bars 1-3 and transverse support bars 1-4 can be on the same plane as the upper surface of the frame (e.g., Figure 4 As shown), it can also be lower than the upper surface of the frame. Preferably, the upper surfaces of the vertical support strips 1-3 and the horizontal support strips 1-4 are lower than the upper surface of the frame, so that the frame and the support strips form a groove-shaped space, in which a protective plate or protective grille (not shown in the figure) can be placed.

[0038] The two sides of the longitudinal rod 1-1 are called the adjustment sections, such as... Figure 1 As shown, it includes a left adjustment section and a right adjustment section; the left adjustment section is located to the left of the leftmost horizontal support bar 1-4, and the right adjustment section is located to the right of the rightmost horizontal support bar 1-4.

[0039] A sliding groove 1-5 is provided on the longitudinal rod 1-1 where the adjustment section is located. The sliding groove 1-5 is located on the front or rear side of the longitudinal rod 1-1.

[0040] The lower surface of the longitudinal rod 1-1, where the adjusting section is located, is also provided with tooth surface 1-6, the length of which is close to or equal to the length of the slide groove 1-5.

[0041] See Figure 3The hanger 2 includes a crossbeam 2-1, hanger rods 2-2, sleeves 2-3, and hanging rods 2-6. There are two hanger rods 2-2, each vertically positioned below the two sides of the crossbeam 2-1. The crossbeam 2-1 and the two hanger rods 2-2 form a downward-opening door frame. The hanging rods 2-6 are mounted on the crossbeam 2-1 and are used to connect to both sides of the box girder.

[0042] Each rod 2-2 has a sleeve 2-3 connected to its bottom. The sleeve 2-3 is a square tube and is fitted onto the longitudinal rod 1-1.

[0043] A slider 2-4 is provided on the left or right side inside the sleeve 2-3, and the slider 2-4 on each sleeve 2-3 is connected to the groove 1-5 on the corresponding connected longitudinal rod 1-1.

[0044] A protruding strip 2-5 is also provided above the bottom surface of the sleeve 2-3, and the protruding strip 2-5 meshes with the toothed surface 1-6 on the lower surface of the longitudinal rod 1-1.

[0045] The vertical dimension of the inner cavity of sleeve 2-3 is slightly larger than that of the vertical dimension of longitudinal rod 1-1, so as to ensure that the meshing connection between sleeve 2-3 and longitudinal rod 1-1 can be released after raising longitudinal rod 1-1 or lowering sleeve 2-3.

[0046] Furthermore, a row of fixing holes 1-7 is provided above or below the slide groove 1-5. Figure 1 The fixing hole 1-7 is located above the slide groove 1-5.

[0047] Correspondingly, a fixing through hole is also provided on the sleeve 2-3. After the sleeve 2-3 and the longitudinal rod 1-1 are positioned, the hole of the sleeve 2-3 is coaxial with the fixing hole 1-7. The sleeve 2-3 and the longitudinal rod 1-1 are further fixed with bolts (such as wing bolts).

[0048] See Figure 1 and Figure 4 In use, the sleeve 2-3 of the hanger 2 is fitted onto the longitudinal rod 1-1 of the base frame 1, and the slider 2-4 of the sleeve 2-3 is located in the groove 1-5 of the longitudinal rod 1-1. After the hanger 2 is fixed to the box girder, the base frame 1 is located on the sleeve 2-3 of the hanger 2 due to gravity. At this time, the protrusion 2-5 inside the sleeve 2-3 engages with the toothed surface 1-6 on the lower surface of the longitudinal rod 1-1 of the base frame 1, which plays a role in positioning and limiting.

[0049] When it is necessary to adjust the position of hanger 2, for example from Figure 1 Adjust the width to Figure 4To adjust the width of the box girder, after raising the longitudinal rod 1-1 of the base frame 1 or lowering the sleeve 2-3, disengage the sleeve 2-3 from the longitudinal rod 1-1. Once the sleeve 2-3 has moved to the target position on the longitudinal rod 1-1, lower the base frame 1, re-engage and reposition it, and then secure it with bolts. Therefore, on-site, the structure of this invention allows for rapid adjustment of the distance between the two hangers 2 according to the width of the box girder.

Claims

1. An adjustable bottom protection platform for bridge construction, comprising a base frame (1) and two hanging frames (2), the two hanging frames (2) are respectively connected to the left and right sides of the base frame (1); characterized in that: The chassis (1) comprises a frame and support bars, the support bars are arranged in the frame, and the frame is composed of two longitudinal rods (1-1) and two horizontal rods (1-2); The longitudinal rod (1-1) comprises a left adjusting section and a right adjusting section, a sliding groove (1-5) is arranged on the longitudinal rod (1-1) where the adjusting section is located, the sliding groove (1-5) is arranged on the front side or the rear side of the longitudinal rod (1-1), and a tooth surface (1-6) is further arranged on the lower surface of the longitudinal rod (1-1) where the adjusting section is located; The hanger (2) comprises a cross beam (2-1), two hanger rods (2-2) and sleeves (2-3), the two hanger rods (2-2) are arranged below the two sides of the cross beam (2-1) respectively, the bottom of each hanger rod (2-2) is connected with a sleeve (2-3), and the left side or the right side of the inner cavity of the sleeve (2-3) is provided with a sliding block (2-4); and the upper surface of the bottom surface of the sleeve (2-3) is provided with a convex strip (2-5). The sleeve (2-3) is sleeved on the corresponding longitudinal rod (1-1), the sliding block (2-4) on each sleeve (2-3) is connected with the sliding groove (1-5) on the corresponding connected longitudinal rod (1-1) in a matched mode, and the convex strip (2-5) of the sleeve (2-3) is engaged with the tooth surface (1-6) on the lower surface of the longitudinal rod (1-1).

2. The adjustable belly shield platform for bridge construction of claim 1, wherein: A row of fixing holes (1-7) are arranged above or below the sliding groove (1-5) of the longitudinal rod (1-1).

3. The adjustable belly shield platform for bridge construction of claim 2, wherein: A fixing through hole is arranged on the sleeve (2-3).

4. The adjustable belly shield platform for bridge construction of claim 1, wherein: The support bars comprise longitudinal support bars (1-3) arranged on the left and right sides of the frame and a horizontal support bar (1-4) arranged in the middle, the longitudinal support bars (1-3) are parallel to the longitudinal rods (1-1), and the horizontal support bar (1-4) is parallel to the horizontal rods (1-2); the horizontal support bar (1-4) is arranged between the two longitudinal rods (1-1); one end of the longitudinal support bar (1-3) is connected with the horizontal rod (1-2), and the other end is connected with the nearest horizontal support bar (1-4).

5. The adjustable belly shield platform for bridge construction of claim 4, wherein: The upper surfaces of the longitudinal support bars (1-3) and the horizontal support bar (1-4) are on the same plane as the upper surface of the frame, or the upper surfaces of the longitudinal support bars (1-3) and the horizontal support bar (1-4) are lower than the upper surface of the frame.

6. The adjustable belly shield platform for bridge construction of claim 4, wherein: The left adjusting section of the longitudinal rod (1-1) is located to the left of the leftmost horizontal support bar (1-4), and the right adjusting section is located to the right of the rightmost horizontal support bar (1-4).

7. The adjustable belly shield platform for bridge construction of claim 1, wherein: The size of the inner cavity of the sleeve (2-3) of the hanger (2) in the up-down direction is greater than the up-down size of the longitudinal rod (1-1) of the chassis (1).

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