Foundation pit safety protection equipment for road

Abstract

The invention relates to the technical field of protective fences, in particular to road foundation pit safety protection equipment which comprises a fence, supporting legs, supporting rods, elastic plates and a driving part, when the driving part drives the elastic plates to deform, the protruding degree of the two elastic plates is gradually increased, and when the protruding degree of the elastic plates is increased, the reset force of the elastic plates is gradually increased. When a hinge rod is gradually shortened and an elastic plate reaches a preset deformation amount, the elastic plate actively resets, a force storage piece drives a supporting rod to reset, and when the elastic plate actively resets, a third positioning needle at the end of the elastic plate pierces into the ground, and due to the fact that the elastic plate has a critical state between a first form and a second form, in the active resetting process of the elastic plate, the elastic plate is in a closed state. And under the action of inertia of the elastic plate, the elastic plate can quickly reach the second form, so that a second positioning needle in the middle of the elastic plate pierces into the ground, the supporting leg is stably fixed on the ground, and the construction efficiency of the protective fence is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of protective fences, and in particular to a road foundation pit safety protection device. Background Art

[0002] In road construction projects, safety protection around the foundation pit can effectively prevent safety accidents such as people falling and objects falling into the foundation pit.

[0003] In the prior art, a Chinese patent with the authorization announcement number CN219431545U discloses a building guardrail. In the public document, through the arrangement of a fixed column, a spring, a limit block, a movable block and a positioning plate, when the fixed column is inserted into the slot, the movable block will slide downward under the thrust. When sliding to the inside of the slot, the movable block will be restored by the thrust of the spring under the limit plate. At the same time, a positioning plate is also provided on the surface of the fixed column to limit the fixing range, and the public document increases the contact area between the fixed column and the ground by a reinforcing plate, thereby enhancing the stability of the guardrail on the ground. However, there is only a contact relationship between the reinforcing plate and the ground. When the external force pushes the fixed column, the fixed column can still move relative to the ground, which easily causes the guardrail to lose its protective effect. When the reinforcing plate is actually installed, in order to prevent the guardrail from losing its protective effect, a pin is usually used to fix the reinforcing plate on the ground, thereby enhancing the stability of the guardrail. However, when the pin is used to fix it on the ground, the construction personnel need to knock the pins into the ground one by one, thereby increasing the overall construction period of the guardrail. Summary of the invention

[0004] The invention provides a road foundation pit safety protection device to solve the problem of low efficiency of existing protection devices during construction.

[0005] A road foundation pit safety protection device of the present invention adopts the following technical solution: A road foundation pit safety protection device comprises a fence, legs, a support rod, an elastic plate and a driving member.

[0006] The supporting leg is vertically arranged, and the supporting leg is fixedly connected to the fence. The lower end of the supporting leg is provided with a first positioning pin, and the first positioning pin can pierce into the ground; two supporting rods are provided, and the two supporting rods are spaced apart on both sides of the supporting leg, and one end of each supporting rod is rotatably connected to the lower end of the supporting leg, and the other end of each supporting rod is rotatably connected to a hinged rod, and the other end of each hinged rod is rotatably connected to the middle part of the supporting leg, and the hinged rod is a telescopic rod; each of the hinged rods is provided with a force storage piece, and the force storage piece is used to drive the telescopic rod to have a tendency to extend; two elastic plates are provided, and one end of the elastic plate is rotatably connected to the The support leg, the other end of the elastic plate is connected to the support rod, the elastic plate has a convex first form and a concave second form, the elastic plate is initially in the first form, a second positioning needle is fixedly provided in the middle of the elastic plate, and a third positioning needle is provided at the end of the elastic plate, when the elastic plate is in the second form, the second positioning needle and the third positioning needle are both pierced into the ground; the driving member is used to drive the deformation degree of the elastic plate to change, and when the elastic plate reaches a preset deformation amount, the driving member allows the elastic plate to actively reset, and when the elastic plate actively resets, the elastic plate can actively switch from the first form to the second form.

[0007] Furthermore, an adjusting member is provided on the support rod, and the adjusting member can adjust the initial deformation degree of the elastic plate when it is in the first form according to the height of the ground.

[0008] Furthermore, the adjustment member includes an adjustment slot and an adjustment block, and there are multiple adjustment slots, which are evenly arranged along the length direction of the support rod; the adjustment block is fixedly connected to the end of the elastic plate, and the adjustment block can enter any one of the adjustment slots.

[0009] Furthermore, the driving member includes a driving rod and a driving gear, the driving rod is connected to the support leg, the driving rod can rotate on the support leg, and the driving rod can also slide on the support leg along its own axial direction; a transmission gear is coaxially fixed on the driving rod; the driving gear is fixedly connected to the support rod, and the transmission gear is initially set not to engage with the driving gear. When the driving rod is pulled to slide along its own axial direction, the transmission gear engages with the driving gear.

[0010] Furthermore, the elastic plate is connected to the support leg via a rotating shaft, the rotating shaft is arranged parallel to the driving rod, and the rotating shaft can slide along its own axial direction on the support leg. When the rotating shaft slides along its own axial direction, the adjustment block can enter or exit the adjustment slot.

[0011] Furthermore, a driving disk is fixedly provided at the end of the driving rod, and the end of the rotating shaft extends to the outside of the supporting leg. When the driving rod slides along its own axial direction, the driving disk can impact the rotating shaft.

[0012] Furthermore, a limit block is provided at one end of the driving rod away from the driving disk, and a limit slot is provided on the support leg, the limit slot has a first section, a second section and a third section, and when the limit block is in the second section, the limit block and the driving rod can rotate around their own axes; when the limit block is in the first section, the transmission gear is disengaged from the driving gear; when the limit block is in the second section and the third section, the transmission gear is in a state of engaging with the driving gear; the limit block is initially set to be in the first section.

[0013] Furthermore, the limit block is a regular octagonal structure, and the outlines of the third section and the first section are regular octagons.

[0014] Furthermore, the force storage member is a force storage spring, and the hinged rod includes a first rod body and a second rod body, the first rod body is hollow inside, one end of the second rod body is inserted into the first rod body, and the force storage spring is arranged inside the first rod body, one end of the force storage spring is fixedly connected to the first rod body, and the other end of the force storage spring is fixedly connected to the second rod body; the force storage spring is always in a compressed state.

[0015] Furthermore, there are two supporting legs, which are arranged at both ends of the fence in the length direction.

[0016] The beneficial effects of the present invention are as follows: a road foundation pit safety protection device of the present invention comprises a fence, legs, support rods, elastic plates and a driving member. When the fence is installed around the foundation pit, the legs fixedly connected to the fence are first placed vertically around the foundation pit, and then the first positioning pins on the legs are pierced into the ground. Under the joint action of the hinged rod and the force storage member, the ends of the two support rods away from the legs are in a state of abutting the ground. In the initial state, the two elastic plates are in the first form, at which time the second positioning pin and the third positioning pin on the elastic plate have not penetrated into the ground. The driving member can drive the two elastic plates to deform at the same time. When the driving member drives the elastic plates to deform, the two The protrusion of each elastic plate gradually increases, and when the protrusion of the elastic plate increases, the reset force of the elastic plate gradually increases. At this time, the hinged rod gradually shortens. When the elastic plate reaches the preset deformation, the elastic plate actively resets, and the force storage member drives the support rod to reset. When the elastic plate actively resets, the third positioning pin at the end of the elastic plate penetrates into the ground. Since the elastic plate is in a critical state between the first form and the second form, during the active reset process of the elastic plate, the elastic plate can quickly reach the second form under the action of its own inertia, so that the second positioning pin in the middle of the elastic plate penetrates into the ground, thereby achieving stable fixing of the support leg on the ground, thereby improving the efficiency of guardrail construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic structural diagram of a road foundation pit safety protection device provided by an embodiment of the present invention; Figure 2 A front view of a road foundation pit safety protection device provided by an embodiment of the present invention; Figure 3 for Figure 2 Sectional view in the AA direction; Figure 4 for Figure 3 A partial enlarged view of point B in the middle; Figure 5 for Figure 2 Cross-sectional view in CC direction; Figure 6 for Figure 5 A partial enlarged view of point D in the middle; Figure 7 A schematic diagram of the structure of a road foundation pit safety protection device provided by an embodiment of the present invention with some legs hidden; Figure 8 An exploded view of the structure of a road foundation pit safety protection device provided by an embodiment of the present invention with some legs hidden; Fig. 9 for Figure 8 A partial enlarged view of point E in the middle; Fig.10 A state diagram of an elastic plate in a road foundation pit safety protection device provided by an embodiment of the present invention when the elastic plate is in a second state; Fig.11 A cross-sectional view of the cooperation between a limit block and a limit groove in a road foundation pit safety protection device provided by an embodiment of the present invention.

[0019] In the figure: 110, fence; 120, support leg; 121, first positioning pin; 130, support rod; 140, hinged rod; 150, elastic plate; 151, second positioning pin; 152, third positioning pin; 160, adjustment slot; 170, adjustment block; 210, drive rod; 220, drive gear; 230, transmission gear; 240, rotating shaft; 250, drive disk; 260, limit block; 270, limit slot; 280, storage spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] like Figures 1 to 11 As shown, an embodiment of the present invention provides a road foundation pit safety protection device, which includes a fence 110, a leg 120, a support rod 130, an elastic plate 150 and a driving member.

[0024] The fence 110 includes a plurality of horizontal bars and a plurality of vertical bars. The plurality of horizontal bars are arranged in parallel and spaced apart. The plurality of vertical bars are arranged in parallel and spaced apart. The horizontal bars and the vertical bars are in the same plane and are perpendicular to each other. The intersection of the horizontal bars and the vertical bars is fixed and welded.

[0025] The leg 120 is vertically arranged and fixedly connected to one of the longitudinal rods of the fence 110. A first positioning pin 121 is provided at the lower end of the leg 120. The first positioning pin 121 can be inserted into the ground. When installing the fence 110, the staff inserts the first positioning pin 121 of the leg 120 into the ground, thereby pre-fixing the leg 120.

[0026] There are two support rods 130, which are spaced apart on both sides of the leg 120. The two support rods 130 have one end close to each other, and the one end close to each other is rotatably connected to the lower end of the leg 120. The other end of the support rod 130 is rotatably connected to a hinge rod 140, and the other end of the hinge rod 140 is rotatably connected to the middle of the leg 120. Further, the hinge rod 140 is a telescopic rod, and a force storage member is provided on the hinge rod 140. The force storage member is always in a force storage state, and the force storage member can drive the hinge rod 140 to always have a tendency to extend. Under the action of the force storage member, the hinge rod 140 can push the support rod 130, so that the end of the support rod 130 away from the leg 120 abuts against the ground.

[0027] Two elastic plates 150 are provided, one end of each elastic plate 150 is rotatably connected to the support leg 120, and the connection position between the elastic plate 150 and the support leg 120 is between the support rod 130 and the hinge rod 140, and the other end of each elastic plate 150 is connected to a support rod 130. The elastic plate 150 can be deformed, and the elastic plate 150 has a first form that bulges upward and a second form that is concave downward. In the initial state, the elastic plate 150 is in the first form. When the support rod 130 rotates relative to the support leg 120, the bending degree of the elastic plate 150 in the first form changes. In addition, the elastic plate 150 has a critical state between the first form and the second form. For example, when the elastic plate 150 changes from the first form to the second form, as external force is applied to the elastic plate 150, the elastic plate 150 gradually deforms. When the elastic plate 150 reaches the critical state, as external force continues to be applied to the elastic plate 150, the elastic plate 150 quickly reaches the second form after crossing the critical state. A second positioning pin 151 is fixedly provided in the middle of each elastic plate 150, and a third positioning pin 152 is provided at the end of each elastic plate 150. When the elastic plate 150 is in the second state, the second positioning pin 151 and the third positioning pin 152 are both pierced into the ground, and there is a sequence when the second positioning pin 151 and the third positioning pin 152 are pierced into the ground. When the end of the support rod 130 contacts the ground, the third positioning pin 152 on the elastic plate 150 is first pierced into the ground. Subsequently, under the action of inertia, the elastic plate 150 is deformed from the first state to the critical state, and is quickly switched from the critical state to the second state. When the elastic plate 150 is deformed to the second state, the second positioning pin 151 is pierced into the ground. When the second positioning pin 151 is pierced into the ground, there is an angle between the direction in which the second positioning pin 151 is pierced into the ground and the direction in which the third positioning pin 152 is pierced into the ground, thereby improving the stability of the support leg 120.

[0028] The driving member is used to drive the deformation degree of the elastic plate 150 to change. Specifically, after the first positioning needle 121 pierces the ground, the driving member drives the support rod 130 to rotate on the support leg 120. During this process, the deformation degree of the elastic plate 150 gradually increases on the basis of the first form, and the force storage degree of the force storage member gradually increases. When the deformation amount of the elastic plate 150 reaches the preset deformation amount, the driving member allows the elastic plate 150 to actively reset. At this time, the support rod 130 rotates in the opposite direction on the support leg 120. At the same time, the force storage member The support rod 130 is pushed to hit the ground. During the active resetting process of the elastic plate 150, one end of the support rod 130 contacts the ground, so that the third positioning needle 152 on the elastic plate 150 first penetrates into the ground. The elastic plate 150 can quickly reach a critical state from the first form. Under the action of inertia, the elastic plate 150 can cross the critical state and switch to the second form, so that the second positioning needle 151 penetrates into the ground, and then the second positioning needle 151 and the third positioning needle 152 on the elastic plate 150 both penetrate into the ground.

[0029] The present invention provides a road foundation pit safety protection device. When installing a fence 110 around the foundation pit, first, the support leg 120 fixedly connected to the fence 110 is vertically placed around the foundation pit, and then the first positioning pin 121 on the support leg 120 is pierced into the ground. Under the joint action of the hinged rod 140 and the force storage member, the ends of the two support rods 130 away from the support leg 120 are in a state of abutting the ground. In the initial state, the two elastic plates 150 are both in the first form. At this time, the second positioning pin 151 and the third positioning pin 152 on the elastic plate 150 have not penetrated into the ground. The driving member can drive the two elastic plates 150 to deform at the same time. When the driving member drives the support rod 130 to rotate on the support leg 120, the two elastic plates 150 are deformed at the same time, and the protrusion degree of the two elastic plates 150 gradually increases, and the elastic plates 150 are deformed at the same time. When the degree of protrusion increases, the restoring force of the elastic plate 150 gradually increases. At this time, the hinge rod 140 gradually shortens. When the elastic plate 150 reaches the preset deformation amount, the driving member allows the elastic plate 150 to actively reset. At this time, the support rod 130 rotates in the opposite direction on the support leg 120, and the force storage member drives the support rod 130 to reset. When the elastic plate 150 actively resets, the third positioning pin 152 at the end of the elastic plate 150 penetrates into the ground. Since the elastic plate 150 is in a critical state between the first form and the second form, during the active reset process of the elastic plate 150, the elastic plate 150 can quickly reach the second form under the action of its own inertia, so that the second positioning pin 151 in the middle of the elastic plate 150 penetrates into the ground, thereby achieving stable fixing of the support leg 120 on the ground, thereby improving the efficiency of guardrail construction.

[0030] In one of the embodiments, an adjustment member is provided on the support rod 130, and the adjustment member can adjust the initial deformation degree of the elastic plate 150 when it is in the first form according to the ground height. Specifically, when the ground is in a flat state, the initial deformation degrees of the two elastic plates 150 are the same. If the ground is in an uneven state, the adjustment member adjusts the initial deformation degrees of the two elastic plates 150 to ensure that after the driving member drives the elastic plate 150 to deform, the elastic plate 150 is in the process of active resetting, and the second positioning pin 151 and the third positioning pin 152 on the elastic plate 150 can be smoothly inserted into the ground.

[0031] In one embodiment, the adjustment member includes an adjustment slot 160 and an adjustment block 170. A plurality of adjustment slots 160 are provided, and the plurality of adjustment slots 160 are evenly arranged along the length direction of the support rod 130. Further, a guide rail extending along the length direction of the support rod 130 is provided in the support rod 130, and the plurality of adjustment slots 160 are evenly distributed along the length direction of the guide rail. The adjustment block 170 is fixedly connected to the end of the elastic plate 150, and the adjustment block 170 can slide along the guide rail, and the adjustment block 170 can enter any one of the adjustment slots 160, and one end of the adjustment block 170 is always in the guide rail; if the ground is in a flat state, the two adjustment blocks 170 are both in the adjustment slots 160 at the end of the guide rail. If the ground is in an uneven state, the initial deformation degree of the elastic plate 150 on the side with a lower ground height increases, that is, the adjustment block 170 is pushed to slide on the guide rail, and then the adjustment slot 160 where the adjustment block 170 is located is adjusted. Subsequently, the driving member is used to drive the support rod 130 to rotate. After the support rod 130 rotates a certain angle, the deformation amounts of the two elastic plates 150 both reach the preset deformation amounts. At this time, the deformation degrees of the two elastic plates 150 are different. When the elastic plate 150 is actively reset, the adjustment blocks 170 in different adjustment slots 160 are all out of the adjustment slots 160. At this time, in order to ensure that the second positioning pins 151 and the third positioning pins 151 on the two elastic plates 150 are The position where the positioning pin 152 penetrates into the ground is the same as the distance between the support legs 120. The adjustment blocks 170 in different adjustment slots 160 are all detached from the adjustment slots 160. Under the action of the elastic plate 150's own restoring force, the adjustment blocks 170 of the two elastic plates 150 slide to the end of the guide rail. In addition, when the deformation degrees of the two elastic plates 150 are different, the power of the support rod 130 when rotating in the opposite direction on the support leg 120 is different, ensuring that when the ground is in an uneven state, the second positioning pins 151 and the third positioning pins 152 on the two elastic plates 150 quickly penetrate into the ground, thereby ensuring that the second positioning pins 151 and the third positioning pins 152 can smoothly penetrate into the ground.

[0032] In one embodiment, the driving member includes a driving rod 210 and a driving gear 220 . The driving rod 210 is connected to the supporting leg 120 . The driving rod 210 can rotate on the supporting leg 120 , and the driving rod 210 can also slide on the supporting leg 120 along its own axis. A transmission gear 230 is coaxially fixed on the driving rod 210, and the driving gear 220 is fixedly connected to the support rod 130. It is initially set that the transmission gear 230 does not mesh with the driving gear 220, and in the initial state, the driving rod 210 cannot rotate on the support leg 120. When the driving rod 210 is pulled to slide along its own axial direction, the transmission gear 230 meshes with the driving gear 220. When it is necessary to drive the support leg 120 to rotate on the support leg 120, the driving rod 210 is first pulled to slide a certain distance in its own axial direction. After the driving rod 210 slides a certain distance in its own axial direction, the driving rod 210 can rotate on the support leg 120. When the driving rod 210 rotates, the meshing transmission of the driving gear 220 and the transmission gear 230 allows the support leg 120 to rotate smoothly on the support leg 120. After the support rod 130 rotates a preset angle on the support leg 120, the two elastic plates 150 both reach the preset deformation amount, and then push the drive rod 210 to slide along its own axial direction again, so that the transmission gear 230 and the drive gear 220 are disengaged, and the support rod 130 is actively reset under the joint action of the elastic plate 150 and the hinge rod 140.

[0033] Furthermore, a reversing shaft is rotatably arranged on the support leg 120, and the reversing shaft is arranged parallel to and spaced from the driving rod 210. The reversing shaft is arranged between one of the support rods 130 and the driving rod 210. A reversing gear is arranged on the reversing shaft, and the reversing gear is meshed with one of the driving gears 220. The reversing gear also meshes with the transmission gear 230. At this time, the transmission gear 230 meshes with one driving gear 220 and a reversing gear, thereby ensuring that when the driving rod 210 is rotated, the two elastic plates 150 can be deformed at the same time.

[0034] In one of the embodiments, the end of the elastic plate 150 is fixedly connected to a rotating shaft 240, which is rotatably connected to the support leg 120. The rotating shaft 240 is arranged parallel to the driving rod 210, and the rotating shaft 240 can slide along its own axial direction on the support leg 120. In the initial state, the adjustment block 170 on the elastic plate 150 is in the adjustment groove 160. When the rotating shaft 240 slides along its own axial direction on the support leg 120, the adjustment block 170 on the elastic plate 150 is separated from the adjustment groove 160. When the first positioning pin 121 is inserted into the ground, the staff observes the height of the ground where the support rods 130 are located. If the heights of the ground where the two support rods 130 are located are the same, there is no need to adjust the adjustment slot 160 where the adjustment block 170 is located; if the heights of the ground where the two support rods 130 are located are different, it is necessary to manually adjust the adjustment slot 160 where the adjustment block 170 corresponding to the lower ground is located. When the drive rod 210 is rotated, the adjustment block 170 needs to be in the adjustment slot 160. After rotating the drive rod 210, when the drive rod 210 is pushed again to slide along its own axial direction, the rotating shaft 240 slides on the support leg 120 along its own axial direction, so that the adjustment block 170 is simultaneously separated from the adjustment slot 160.

[0035] In one of the embodiments, a driving disk 250 is fixedly provided at the end of the driving rod 210, and the end of the rotating shaft 240 extends to the outside of the support leg 120. When the driving rod 210 slides along its own axial direction, the driving disk 250 can hit the rotating shaft 240. Specifically, when the driving rod 210 is rotated, the convenience of driving the driving rod 210 can be improved by providing the driving disk 250. To ensure that when the driving rod 210 slides along its own axial direction, the rotating shaft 240 can slide along its own axial direction at the same time, the driving disk 250 is provided at the end of the driving rod 210, and the length of the rotating shaft 240 is adjusted to ensure that when the transmission gear 230 and the driving gear 220 are disengaged, the driving disk 250 can hit the rotating shaft 240, so that the sliding of the driving rod 210 along its own axial direction and the sliding of the rotating shaft 240 along its own axial direction are synchronized. Furthermore, when the driving rod 210 needs to be rotated, the driving disk 250 is manually rotated, and when the driving rod 210 needs to slide along its own axial direction, the driving disk 250 is manually pulled or pushed.

[0036] In one embodiment, a limiting block 260 is provided at one end of the driving rod 210 away from the driving disk 250, and a limiting slot 270 is provided on the leg 120. The limiting slot 270 has a first section, a second section and a third section. The first section, the second section and the third section of the limiting slot 270 are interconnected. The first section, the second section and the third section of the limiting slot 270 are coaxially arranged. In the axial direction of the driving rod 210, the limiting slot 270 is provided with a first section, a second section and a third section. Fig.11For example, the first section is at the rightmost end of the limit groove 270, the second section is at the middle of the limit groove 270, and the third section is at the leftmost end of the limit groove 270. When the limit block 260 is at the second section of the limit groove 270, the limit block 260 can rotate in the second section, and the driving rod 210 can rotate around its own axis. When the limit block 260 is at the first section or the third section, the limit block 260 cannot rotate in the first section or the third section, and the driving rod 210 cannot rotate around its own axis. When the limit block 260 is in the first section, the transmission gear 230 and the driving gear 220 are in a disengaged state. When the limit block 260 is in the second section or the third section, the transmission gear 230 and the driving gear 220 are in a meshing state. In the initial state, the limit block 260 is in the first section of the limit groove 270. When the driving gear 220 needs to rotate, the driving rod 210 is first pulled to slide a distance along its own axial direction, so that the limit block 260 enters the second section of the limit groove 270 from the first section of the limit groove 270, and then the driving rod 210 is rotated. After rotating the driving rod 210 at a certain angle, the driving rod 210 is pulled again to slide a distance along its own axial direction, so that the limit block 260 enters the third section of the limit groove 270 from the second section of the limit groove 270, and then the driving rod 210 is pushed to reset in the direction of its own axial direction, so that the limit block 260 is restored from the third section of the limit groove 270 to the first section.

[0037] In one embodiment, the limit block 260 is a regular octagonal structure, and the contours of the third section and the first section are regular octagons. By limiting the contour of the limit block 260, it is ensured that when the elastic plate 150 reaches a preset deformation amount, the limit block 260 can enter the third section of the limit groove 270, and when the elastic plate 150 is actively reset, the limit block 260 can smoothly enter the first section of the limit groove 270.

[0038] In one embodiment, the force storage member is a force storage spring 280, and the articulated rod 140 includes a first rod body and a second rod body. The first rod body is hollow inside, and one end of the second rod body is inserted into the first rod body. The force storage spring 280 is arranged inside the first rod body, and one end of the force storage spring 280 is fixedly connected to the first rod body, and the other end of the force storage spring 280 is fixedly connected to the second rod body. The force storage spring 280 is always in a compressed state. Under the action of the force storage spring 280, the articulated rod 140 always has a tendency to stretch, so that the articulated rod 140 can push the support rod 130 to hit the ground.

[0039] In one embodiment, in order to further improve the stability of the fence 110 , two legs 120 are provided, and the two legs 120 are provided at both ends of the fence 110 in the length direction.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A road foundation pit safety protection device, characterized in that: include: Fences; A supporting leg, wherein the supporting leg is vertically arranged, the supporting leg is fixedly connected to the fence, and a first positioning needle is arranged at the lower end of the supporting leg, and the first positioning needle can pierce into the ground; A support rod, wherein two support rods are provided, and the two support rods are spaced apart and distributed on both sides of the support leg, one end of each support rod is rotatably connected to the lower end of the support leg, and the other end of each support rod is rotatably connected to a hinge rod, and the other end of each hinge rod is rotatably connected to the middle part of the support leg, and the hinge rod is a telescopic rod; each hinge rod is provided with a force storage member, and the force storage member is used to drive the telescopic rod to have a tendency to extend; An elastic plate, wherein two elastic plates are provided, one end of the elastic plate is rotatably connected to the supporting leg, and the other end of the elastic plate is connected to the supporting rod, the elastic plate has a convex first form and a concave second form, the elastic plate is initially in the first form, a second positioning needle is fixedly provided in the middle of the elastic plate, and a third positioning needle is provided at the end of the elastic plate, and when the elastic plate is in the second form, the second positioning needle and the third positioning needle are both pierced into the ground; A driving member, wherein the driving member is used to drive the deformation degree of the elastic plate to change, and when the elastic plate reaches a preset deformation amount, the driving member allows the elastic plate to actively reset, and when the elastic plate actively resets, the elastic plate can actively switch from the first form to the second form.

2. A road foundation pit safety protection device according to claim 1, characterized in that: The support rod is provided with an adjusting member, and the adjusting member can adjust the initial deformation degree of the elastic plate when it is in the first form according to the ground height.

3. A road foundation pit safety protection device according to claim 2, characterized in that: The adjustment member includes an adjustment slot and an adjustment block. There are multiple adjustment slots, and the multiple adjustment slots are evenly arranged along the length direction of the support rod; the adjustment block is fixedly connected to the end of the elastic plate, and the adjustment block can enter any one of the adjustment slots.

4. A road foundation pit safety protection device according to claim 3, characterized in that: The driving member includes a driving rod and a driving gear, wherein the driving rod is connected to the support leg, the driving rod can rotate on the support leg, and the driving rod can also slide on the support leg along its own axial direction; a transmission gear is coaxially fixed on the driving rod; the driving gear is fixedly connected to the support rod, and the transmission gear is initially set not to engage with the driving gear. When the driving rod is pulled to slide along its own axial direction, the transmission gear engages with the driving gear.

5. A road foundation pit safety protection device according to claim 4, characterized in that: The elastic plate is connected to the supporting leg via a rotating shaft, the rotating shaft is arranged parallel to the driving rod, and the rotating shaft can slide along its own axial direction on the supporting leg. When the rotating shaft slides along its own axial direction, the adjusting block can enter or leave the adjusting groove.

6. A road foundation pit safety protection device according to claim 5, characterized in that: A driving disk is fixedly provided at the end of the driving rod, and the end of the rotating shaft extends to the outside of the supporting leg. When the driving rod slides along its own axial direction, the driving disk can impact the rotating shaft.

7. A road foundation pit safety protection device according to claim 6, characterized in that: A limit block is provided at one end of the driving rod away from the driving disk, and a limit slot is provided on the leg, wherein the limit slot has a first section, a second section and a third section, and when the limit block is in the second section, the limit block and the driving rod can rotate around their own axes; When the limit block is in the first section, the transmission gear is disengaged from the driving gear; when the limit block is in the second section and the third section, the transmission gear is in a state of engaging with the driving gear; the limit block is initially set to be in the first section.

8. The road foundation pit safety protection device according to claim 7 is characterized in that: The limit block is a regular octagonal structure, and the outlines of the third section and the first section are regular octagons.

9. The road foundation pit safety protection device according to claim 1, characterized in that: The force storage piece is a force storage spring, and the hinged rod includes a first rod body and a second rod body. The first rod body is hollow inside, and one end of the second rod body is inserted into the first rod body. The force storage spring is arranged inside the first rod body, and one end of the force storage spring is fixedly connected to the first rod body, and the other end of the force storage spring is fixedly connected to the second rod body; the force storage spring is always in a compressed state.

10. The road foundation pit safety protection device according to claim 1, characterized in that: The two legs are arranged at two ends of the fence in the length direction.

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