Formwork guardrail of precast beam yard

Abstract

The utility model discloses a precast beam yard formwork guardrail which comprises a first guardrail body, the first guardrail body is arranged along the free side of a formwork and comprises a first lower guardrail body, and a first supporting leg is arranged at the bottom of the first lower guardrail body; the first upper guardrail is arranged on one side, far away from the first supporting leg, of the first lower guardrail, and the first upper guardrail is pivotally connected with the first lower guardrail through a hinge; the precast beam yard formwork guardrail further comprises vertical bolts, the vertical bolts are arranged at the connecting position of the first upper guardrail body and the first lower guardrail body, the precast beam yard formwork guardrail further comprises first sleeves, the first sleeves are fixed to the formworks, and the first supporting legs can be contained in the first sleeves. When the prefabricated beam field formwork construction is carried out, only the first sleeve needs to be fixed on the formwork, then the first supporting leg of the first guardrail is inserted into the first sleeve, connection between the guardrail and the formwork can be achieved, only the first guardrail needs to be integrally taken out of the first sleeve in the disassembly process, and disassembly and assembly are easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction safety, in particular to a template guardrail for a prefabricated beam field. Background Art

[0002] In modern highway bridge construction, the upper part of the bridge is mostly made of precast beams, which are mostly processed in precast beam yards. Precast beams are made by building templates in the precast beam yard and pouring concrete into the templates to form them.

[0003] During the formwork construction in the prefabricated beam yard, workers are required to carry out construction work. Due to the large size of the prefabricated beams, there are often many dangers and hidden dangers during construction work, such as falling from heights. Therefore, in order to ensure the safety of on-site construction workers, in accordance with the technical specifications for safety of high-altitude operations in construction, when performing edge operations with a falling height reference plane of 2m or above, a guardrail should be installed on the side facing the air. The existing guardrails are usually fixed around the formwork by criss-crossing steel pipes, and the steel pipes are fixed by welding or bolting. The early installation and later removal are more troublesome. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a prefabricated beam field template guardrail, including a first guardrail, the first guardrail is arranged along the air side of the template, the first guardrail is removably installed on the template as a whole, and the first guardrail includes

[0005] a first lower guardrail, at the bottom of which a first leg is provided; and

[0006] A first upper guardrail, the first upper guardrail is arranged on a side of the first lower guardrail away from the first leg, and the first upper guardrail is pivotally connected to the first lower guardrail through a hinge;

[0007] The first upper guardrail can flip around the pivot axis of the hinge to make the first guardrail in a folded state or an unfolded state;

[0008] The precast beam yard template guardrail also includes a vertical latch, which is arranged at the connection between the first upper and lower guardrails, and the first guardrail is kept in an unfolded state by the vertical latch;

[0009] The precast beam yard formwork guardrail also includes a first sleeve, which is fixed on the formwork and can accommodate the above-mentioned first leg.

[0010] The utility model prefabricates the first guardrail in advance. When constructing the formwork in the prefabricated beam field, it is only necessary to fix the first sleeve on the formwork and then insert the first leg of the first guardrail into the first sleeve to achieve the connection between the guardrail and the formwork. Finally, the first upper guardrail is flipped upward and unfolded, and the latch rod of the vertical latch is slid into the sub-base to keep the first guardrail in the unfolded state, thereby completing the installation of the guardrail. The installation is simple and convenient. When disassembling, it is only necessary to move the vertical latch in the opposite direction to make the latch rod slide out of the sub-base, flip the first upper guardrail downward, and then take the first guardrail out of the first sleeve as a whole. The disassembly is simple and convenient.

[0011] Furthermore, the precast beam yard template guardrail also includes a second guardrail, which is arranged between at least one pair of adjacent first guardrails, and the second guardrail can be horizontally flipped around one side thereof;

[0012] The second guardrail includes

[0013] Second lower guardrail; and

[0014] A second upper guardrail, the second upper guardrail is arranged on one side of the second lower guardrail, and the second upper guardrail is pivotally connected to the second lower guardrail through a hinge;

[0015] The second upper guardrail can flip around the pivot axis of the hinge to make the second guardrail be in a folded state or an unfolded state;

[0016] The precast beam yard template guardrail also includes a vertical pin, which is arranged at the connection between the second upper and lower guardrails. The second guardrail is kept in an expanded state through the vertical pin.

[0017] The second guardrail is used to protect the air side of the template joint and the lifting position. At the same time, when separating the template, there is no need to dismantle the entire guardrail. The second guardrail can be flipped and folded to the first guardrail. The operation is simple and convenient.

[0018] Furthermore, the second lower guardrail is provided with a second leg on a side away from the second upper guardrail;

[0019] The second leg is arranged on the side of the second lower guardrail close to one group of the first guardrails;

[0020] The prefabricated beam yard formwork guardrail also includes a second sleeve, which is fixed on the above-mentioned formwork corresponding to the second leg. The second leg can be inserted into the second sleeve, and the second leg can rotate relative to the second sleeve.

[0021] Fix the second sleeve at the joint of the template and the lifting position, insert the second leg of the second guardrail into the second sleeve, and the second guardrail can be connected to the template. When the second guardrail is unfolded in the same way as the first guardrail, installation can be achieved. When disassembling, you can refer to the disassembly method of the first guardrail, which is simple and convenient.

[0022] Furthermore, the second guardrail is connected to one group of the first guardrails via a detachable hinge;

[0023] The detachable hinge comprises

[0024] A connecting sleeve, the connecting sleeve comprising a second mounting portion and a sleeve, the second mounting portion being fixedly mounted on the first guardrail or the second guardrail, the sleeve being arranged on one side of the second mounting portion, and having a socket in the sleeve;

[0025] A connecting pin, comprising a first mounting portion and a pin, wherein the first mounting portion is fixedly mounted on the first guardrail or the second guardrail, the pin is arranged on one side of the first mounting portion, and one end of the pin has a pin shaft that can match the above-mentioned socket.

[0026] When installing the second guardrail, first unfold and fix the second guardrail, then place the side with the connecting pin corresponding to the connecting sleeve, and insert the pin rod corresponding to the sleeve to complete the installation of the second guardrail. Disassembly and assembly are simple and convenient.

[0027] Furthermore, a frustum is provided at the end of the pin shaft, the diameter of one end of the frustum connected to the pin shaft is larger than the diameter of the other end, and the diameter of one end of the frustum connected to the pin shaft is larger than the diameter of the pin shaft;

[0028] The connecting pin also includes a movable groove radially penetrating the above-mentioned cone and the pin shaft, and the pin shaft and the cone are elastic;

[0029] One end of the insertion hole is provided with a fixing hole matching the frustum.

[0030] Furthermore, the connecting pin also includes a movable cap, which is installed in the connecting sleeve at one end close to the fixed hole corresponding to the socket, and the movable cap can move linearly along the axial direction of the socket. A frustum hole is provided in the movable cap, and in the process of the frustum hole wrapping the frustum, the frustums divided by the movable groove approach each other.

[0031] When the pin rod is inserted into the socket, the inner wall of the socket will squeeze the two sides of the cone, so that the cone bends into the movable groove until the cone moves completely to the fixed hole along the axis of the socket. Since the diameter of the fixed hole is larger than the socket, the cone will move back outward, so that the connecting pin is clamped in the connecting sleeve to achieve fixation, thereby preventing the second guardrail from falling out and causing safety hazards. When disassembling, it is only necessary to press the movable cap hard, and the movable cap moves toward the cone, so that the cone hole wraps the cone. In the process of complete wrapping, the inner wall of the cone hole will squeeze the cone, so that the cone bends into the movable groove until the cone is bent in place. The connection between the cone and the pin shaft can move linearly in the socket, so that the connecting pin can be taken out of the connecting sleeve, which is convenient for disassembly and assembly.

[0032] Furthermore, the second guardrail is fixed to the first guardrail arranged on the opposite side of the rotatable side of the second guardrail by a transverse latch.

[0033] By inserting the pin rod of the horizontal pin into the horizontal sub-base, the second guardrail is fixed to the first guardrail, thereby preventing the second guardrail from flipping horizontally under the action of external force during construction, thereby preventing safety hazards.

[0034] Furthermore, a footboard is provided on the side of the first lower guardrail away from the first upper guardrail and on the side of the second lower guardrail away from the second upper guardrail.

[0035] The utility model has the following advantages:

[0036] The utility model prefabricates the first guardrail in advance. When constructing the formwork in the prefabricated beam field, it is only necessary to fix the first sleeve on the formwork and then insert the first leg of the first guardrail into the first sleeve to achieve the connection between the guardrail and the formwork. Finally, the first upper guardrail is flipped upward and unfolded, and the latch rod of the vertical latch is slid into the sub-base to keep the first guardrail in the unfolded state, thereby completing the installation of the guardrail. The installation is simple and convenient. When disassembling, it is only necessary to move the vertical latch in the opposite direction to make the latch rod slide out of the sub-base, flip the first upper guardrail downward, and then take the first guardrail out of the first sleeve as a whole. The disassembly is simple and convenient.

[0037] The second guardrail is used to protect the air side of the template joint and the lifting position. At the same time, when separating the template, there is no need to dismantle the entire guardrail. The second guardrail can be flipped and folded to the first guardrail. The operation is simple and convenient.

[0038] Fix the second sleeve at the joint of the template and the lifting position, insert the second leg of the second guardrail into the second sleeve, and the second guardrail can be connected to the template. When the second guardrail is unfolded in the same way as the first guardrail, installation can be achieved. When disassembling, you can refer to the disassembly method of the first guardrail, which is simple and convenient.

[0039] When installing the second guardrail, first unfold and fix the second guardrail, then place the side with the connecting pin corresponding to the connecting sleeve, and insert the pin rod corresponding to the sleeve to complete the installation of the second guardrail. Disassembly and assembly are simple and convenient.

[0040] When the pin rod is inserted into the socket, the inner wall of the socket will squeeze the two sides of the cone, so that the cone bends into the movable groove until the cone moves completely to the fixed hole along the axis of the socket. Since the diameter of the fixed hole is larger than the socket, the cone will move back outward, so that the connecting pin is clamped in the connecting sleeve to achieve fixation, thereby preventing the second guardrail from falling out and causing safety hazards. When disassembling, it is only necessary to press the movable cap hard, and the movable cap moves toward the cone, so that the cone hole wraps the cone. In the process of complete wrapping, the inner wall of the cone hole will squeeze the cone, so that the cone bends into the movable groove until the cone is bent in place. The connection between the cone and the pin shaft can move linearly in the socket, so that the connecting pin can be taken out of the connecting sleeve, which is convenient for disassembly and assembly.

[0041] By inserting the pin rod of the horizontal pin into the horizontal sub-base, the second guardrail is fixed to the first guardrail, thereby preventing the second guardrail from flipping horizontally under the action of external force during construction, thereby preventing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural diagram of the formwork guardrail of the precast beam yard;

[0043] Figure 2 yes Figure 1 The schematic diagram of part of the structure of the formwork guardrail of the precast beam yard is shown;

[0044] Figure 3 yes Figure 1 The structural schematic diagram of the first guardrail in the precast beam yard formwork guardrail is shown;

[0045] Figure 4 yes Figure 3 a front view of the first guardrail shown;

[0046] Figure 5 yes Figure 3 A first partial structural schematic diagram of a first guardrail is shown;

[0047] Figure 6 yes Figure 3 A second partial structural schematic diagram of the first guardrail shown;

[0048] Figure 7 yes Figure 1 The structural schematic diagram of the second guardrail in the precast beam yard formwork guardrail is shown;

[0049] Figure 8yes Figure 1 The schematic diagram of the connection between the first guardrail and the second guardrail in the precast beam yard template guardrail is shown;

[0050] Fig. 9 yes Figure 8 A schematic diagram of the structure of a detachable hinge in the schematic diagram of the connection between the first guardrail and the second guardrail;

[0051] Fig.10 yes Fig. 9 A schematic cross-sectional view of the detachable hinge shown;

[0052] Fig.11 yes Fig. 9 A schematic diagram of the structure of the connecting pin in the detachable hinge shown;

[0053] Fig.12 yes Fig. 9 A schematic cross-sectional view of a connecting sleeve in the detachable hinge shown;

[0054] Fig.13 yes Fig. 9 A schematic cross-sectional view of a movable cap in the detachable hinge shown;

[0055] Fig.14 yes Fig. 9 Schematic diagram of the coordinated movement of the movable cap and the connecting pin in the detachable hinge shown. DETAILED DESCRIPTION

[0056] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0057] In this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0058] As described in the background art, existing guardrails are usually fixed around the template by crisscrossing steel pipes, and the steel pipes are fixed by welding or bolting, which makes the early installation and later removal more troublesome.

[0059] Embodiment 1:

[0060] Therefore, in order to solve the above technical problems, this embodiment provides a prefabricated beam field template guardrail, such as Figure 1 As shown, the precast beam field template guardrail includes a first guardrail 100, which is arranged along the air side of the template, and the first guardrail 100 is removably installed on the template as a whole. Figure 3 , 4 As shown, the first guardrail 100 in this embodiment includes

[0061] A first lower guardrail 120, with a first leg 130 disposed at the bottom of the first lower guardrail 130; and

[0062] The first upper guardrail 110 is arranged on a side of the first lower guardrail 120 away from the first leg. Figure 6 As shown, the first upper guardrail 110 is pivotally connected to the first lower guardrail 120 via a hinge 600;

[0063] The first upper guardrail 110 can flip around the pivot axis of the hinge 600 to make the first guardrail 100 in a folded state or an unfolded state;

[0064] like Figure 5 As shown, in this embodiment, the precast beam field template guardrail further includes a vertical latch 500, which is arranged at the connection between the first upper and lower guardrails, and the first guardrail is kept in an unfolded state by the vertical latch;

[0065] like Figure 2 As shown, the precast beam yard formwork guardrail in this embodiment also includes a first sleeve 300 , which is fixed on the formwork and can accommodate the above-mentioned first leg 130 .

[0066] The utility model prefabricates the first guardrail in advance, and when the template of the prefabricated beam field is constructed, Figure 2 As shown, first fix the first sleeve 300 on the template, then insert the first leg of the first guardrail into the first sleeve to achieve the connection between the guardrail and the template, and finally flip the first upper guardrail upward to unfold the first guardrail, slide the latch rod of the vertical latch 500 into the sub-base to keep the first guardrail in the unfolded state, and the installation of the guardrail is completed. The installation is simple and convenient. When disassembling, you only need to move the vertical latch in the opposite direction to make the latch rod slide out of the sub-base, flip the first upper guardrail downward, and then take the first guardrail out of the first sleeve as a whole. Disassembly is simple and convenient.

[0067] Through this embodiment, the guardrail on the side of the template facing the air can be quickly installed to provide safety protection for the side of the template facing the air, and it is also convenient for dismantling at a later time.

[0068] In this embodiment, the hinge 600 may adopt a hinge structure with a pivot axis, such as a hinge-type structure hinge, or may adopt hinges of other structural forms to enable the upper guardrail to flip relative to the lower guardrail.

[0069] In this embodiment, the fixing method of the first sleeve and the template 900 includes but is not limited to welding, fusion, riveting, bolt connection, screw connection or other connection methods that can achieve relative fixation of the first sleeve and the template.

[0070] In this embodiment, a bolt threadably connected to the first sleeve may be provided on the outside of the first sleeve, and by tightening the bolt, the tail of the bolt abuts against the side of the first leg to achieve relative fixation of the first guardrail.

[0071] Embodiment 2:

[0072] In order to achieve the protection of the template joints and the hoisting position, this embodiment is improved based on embodiment 1, such as Figure 1 As shown, different from the embodiment 1, the precast beam field template guardrail in this embodiment further includes a second guardrail 200, the second guardrail 200 is arranged between at least one pair of adjacent first guardrails, and the second guardrail 200 can be horizontally flipped around one side thereof;

[0073] like Figure 7 As shown, the second guardrail 200 includes

[0074] A second lower guardrail 220; and

[0075] A second upper guardrail 210, wherein the second upper guardrail 210 is disposed on one side of the second lower guardrail 220, and the second upper guardrail 210 is pivotally connected to the second lower guardrail 220 via a hinge 600;

[0076] The second upper guardrail 210 can flip around the pivot axis of the hinge 600 to make the second guardrail 200 in a folded state or an unfolded state;

[0077] The precast beam yard template guardrail also includes a vertical pin 500, which is arranged at the connection between the second upper and lower guardrails. The second guardrail is kept in an unfolded state through the vertical pin.

[0078] By arranging the second guardrail at the template joint and the hoisting position, the second guardrail can be horizontally flipped around the vertical axis on one side thereof. By horizontally flipping the second guardrail, it is convenient for operators to enter and exit the guardrail-enclosed area.

[0079] In this embodiment, the second guardrail is fixed to the first guardrail disposed on the opposite side of the rotatable side of the second guardrail by a transverse latch 800 .

[0080] By inserting the pin rod of the horizontal pin 800 into the horizontal sub-base, the second guardrail is fixed to the first guardrail, thereby preventing the second guardrail from flipping horizontally under the action of external force during the construction process, thereby preventing safety hazards.

[0081] When the template needs to be lifted, translated or otherwise moved, the latch rod of the transverse latch only needs to be moved in the opposite direction, the sub-base of the transverse latch can be moved out to contact the connection between the second guardrail and the first guardrail, and it can be flipped over to overlap with the first guardrail without dismantling the entire guardrail.

[0082] The second guardrail is used to protect the air side of the template joint and the lifting position. At the same time, when separating the template, there is no need to dismantle the entire guardrail. It is only necessary to retract the horizontal pin of the second guardrail and flip it over and fold it to the first guardrail. The operation is simple and convenient.

[0083] Embodiment 3:

[0084] This embodiment proposes a method for realizing the horizontal flipping of the second guardrail. In this embodiment, a second leg is arranged on the side of the second lower guardrail 220 away from the second upper guardrail;

[0085] The second leg is arranged on the side of the second lower guardrail close to one group of the first guardrails;

[0086] In this embodiment, the prefabricated beam yard formwork guardrail also includes a second sleeve, which is fixed on the above-mentioned formwork corresponding to the second leg. The second leg can be inserted into the second sleeve, and the second leg can rotate relative to the second sleeve.

[0087] In this embodiment, the fixing method of the second sleeve can refer to the fixing method of the first sleeve mentioned above.

[0088] In this embodiment, the second sleeve is fixed at the joint of the template and the lifting position, and the second leg of the second guardrail is inserted into the second sleeve, so that the second guardrail can be connected to the template. The second guardrail can be installed by unfolding the second guardrail in the same way as the first guardrail. When disassembling, the disassembly method of the first guardrail can be referred to, and the disassembly and assembly are simple and convenient.

[0089] Embodiment 4:

[0090] This embodiment proposes a second method for realizing the horizontal flipping of the second guardrail, such as Figure 8 As shown, the second guardrail in this embodiment is connected to one group of the first guardrails via a detachable hinge 700;

[0091] like Fig. 9 As shown, the detachable hinge 700 includes

[0092] Connecting sleeve 720, such as Fig.12 As shown, the connecting sleeve 720 includes a second mounting portion 722 and a sleeve 721, the second mounting portion 722 is fixedly mounted on the first guardrail or the second guardrail, the sleeve is arranged on one side of the second mounting portion 722, and a socket 723 is arranged in the sleeve 721;

[0093] Connecting pin 720, such as Fig.11 As shown, the connecting pin 720 includes a first mounting portion 711 and a pin 715. The first mounting portion is fixedly mounted on the first guardrail or the second guardrail. The pin 715 is arranged on one side of the first mounting portion 711. One end of the pin 715 has a pin shaft 712 that can match the above-mentioned socket 723.

[0094] When installing the second guardrail, first unfold and fix the second guardrail, then place the side with the connecting pin corresponding to the connecting sleeve 720, and insert the pin rod corresponding to the sleeve 721 to complete the installation of the second guardrail. The disassembly and assembly are simple and convenient.

[0095] Exemplarily, the second mounting portion of the connecting sleeve 720 is pre-fixed on one side of the second guardrail by riveting, screw connection, welding, bolt connection or other fixed connection methods, and the first connecting portion of the connecting pin is fixedly installed on one side of the first guardrail by the above-mentioned fixed connection method. During installation, the connecting sleeve of the unfolded second guardrail is directly plugged into the corresponding connecting pin to achieve the hinge connection between the first guardrail and the second guardrail.

[0096] Embodiment 5:

[0097] In order to prevent the second guardrail from detaching during operation and causing a safety accident, this embodiment proposes an improvement based on embodiment 4, such as Fig.11 As shown, a frustum 713 is provided at the end of the pin shaft 712, and the diameter of one end of the frustum 713 connected to the pin shaft 712 is larger than the other end, and the diameter of one end of the frustum connected to the pin shaft is larger than the diameter of the pin shaft;

[0098] The connecting pin also includes a movable groove 714 radially penetrating the above-mentioned cone 713 and the pin shaft, and the pin shaft and cone are elastic;

[0099] like Fig.12 As shown, one end of the insertion hole 723 has a fixing hole 724 matching the above-mentioned frustum.

[0100] like Fig. 9 As shown, the connecting pin in this embodiment further includes a movable cap 730, and the movable cap 730 is installed in the connecting sleeve 720 at one end close to the fixing hole corresponding to the plug hole, as shown in FIG. Fig.13As shown, the movable cap 730 can move linearly along the axial direction of the jack, and a frustum hole 731 is provided in the movable cap. When the frustum hole wraps the frustum, the frustums divided by the movable groove are close to each other.

[0101] When the bolt rod is inserted into the socket, the inner wall of the socket will squeeze the two sides of the cone, so that the cone bends into the movable groove until the cone moves completely along the axis of the socket to the fixing hole 724. Since the diameter of the fixing hole is larger than the socket, the cone will move back outward, so that the connecting bolt is clamped in the connecting sleeve to achieve fixation. Fig.10 , thereby preventing the second guardrail from falling out and causing safety hazards. When disassembling, if Fig.14 As shown, it is only necessary to press the movable cap 730 hard, and the movable cap moves toward the direction of the cone so that the cone hole wraps the cone. During the complete wrapping process, the inner wall of the cone hole will squeeze the cone so that the cone bends into the movable groove until the cone is bent into place. The connection between the cone and the pin shaft can move linearly in the socket, so that the connecting pin can be taken out of the connecting sleeve for easy disassembly and assembly.

[0102] In addition, a footboard 400 may be provided on the first lower guardrail away from the first upper guardrail and on the second lower guardrail away from the second upper guardrail in the present invention.

[0103] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A precast beam field formwork guardrail, comprising a first guardrail, the first guardrail being arranged along the air-facing side of the formwork, characterized in that: The first guardrail is integrally mounted on the template in a removable manner, and the first guardrail includes a first lower guardrail, at the bottom of which a first leg is provided; and A first upper guardrail, the first upper guardrail is arranged on a side of the first lower guardrail away from the first leg, and the first upper guardrail is pivotally connected to the first lower guardrail through a hinge; The first upper guardrail can flip around the pivot axis of the hinge to make the first guardrail in a folded state or an unfolded state; The precast beam yard template guardrail also includes a vertical latch, which is arranged at the connection between the first upper and lower guardrails, and the first guardrail is kept in an unfolded state by the vertical latch; The precast beam yard formwork guardrail also includes a first sleeve, which is fixed on the formwork and can accommodate the above-mentioned first leg.

2. The precast beam field formwork guardrail according to claim 1 is characterized in that: The precast beam yard template guardrail also includes a second guardrail, which is arranged between at least one pair of adjacent first guardrails, and the second guardrail can be horizontally flipped around one side thereof; The second guardrail includes The second guardrail; as well as A second upper guardrail, the second upper guardrail is arranged on one side of the second lower guardrail, and the second upper guardrail is pivotally connected to the second lower guardrail through a hinge; The second upper guardrail can flip around the pivot axis of the hinge to make the second guardrail be in a folded state or an unfolded state; The precast beam yard template guardrail also includes a vertical pin, which is arranged at the connection between the second upper and lower guardrails. The second guardrail is kept in an expanded state through the vertical pin.

3. The precast beam field formwork guardrail according to claim 2 is characterized in that: A second leg is provided on the side of the second lower guardrail away from the second upper guardrail; The second leg is arranged on the side of the second lower guardrail close to one group of the first guardrails; The prefabricated beam yard formwork guardrail also includes a second sleeve, which is fixed on the above-mentioned formwork corresponding to the second leg. The second leg can be inserted into the second sleeve, and the second leg can rotate relative to the second sleeve.

4. The precast beam field formwork guardrail according to claim 2 is characterized in that: The second guardrail is connected to one set of the first guardrails via a detachable hinge; The detachable hinge comprises A connecting sleeve, the connecting sleeve comprising a second mounting portion and a sleeve, the second mounting portion being fixedly mounted on the first guardrail or the second guardrail, the sleeve being arranged on one side of the second mounting portion, and having a socket in the sleeve; A connecting pin, comprising a first mounting portion and a pin, wherein the first mounting portion is fixedly mounted on the first guardrail or the second guardrail, the pin is arranged on one side of the first mounting portion, and one end of the pin has a pin shaft that can match the above-mentioned socket.

5. The precast beam field formwork guardrail according to claim 4 is characterized in that: A frustum is provided at the end of the pin shaft, the diameter of one end of the frustum connected to the pin shaft is larger than the other end, and the diameter of one end of the frustum connected to the pin shaft is larger than the diameter of the pin shaft; The connecting pin also includes a movable groove radially penetrating the above-mentioned cone and the pin shaft, and the pin shaft and the cone are elastic; One end of the insertion hole is provided with a fixing hole matching the frustum.

6. The precast beam field formwork guardrail according to claim 5, characterized in that: The connecting pin also includes a movable cap, which is installed in the connecting sleeve at one end close to the fixed hole corresponding to the socket. The movable cap can move linearly along the axial direction of the socket. A frustum hole is provided in the movable cap. In the process of the frustum hole wrapping the frustum, the frustums divided by the movable groove approach each other.

7. The precast beam field formwork guardrail according to claim 2, characterized in that: The second guardrail is fixed to the first guardrail disposed on the opposite side of the rotatable side of the second guardrail by a transverse latch.

8. The precast beam field formwork guardrail according to claim 2, characterized in that: The first lower guardrail is provided with a footboard on a side away from the first upper guardrail and the second lower guardrail is provided with a footboard on a side away from the second upper guardrail.

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