A safety protection device for foundation pits used on roads

Abstract

The present invention relates to the technical field of protective fences, and particularly to a safety protection device for road foundation pits, which includes a fence, legs, support rods, elastic plates and driving members. When the driving members drive the elastic plates to deform, the bulging degrees of the two elastic plates gradually increase. And when the bulging degree of the elastic plate increases, the restoring force of the elastic plate gradually increases, and the hinge rods gradually shorten. When the elastic plate reaches a preset deformation amount, the elastic plate actively resets, and the energy storage member drives the support rod to reset. When the elastic plate actively resets, the third positioning needles at the ends of the elastic plate penetrate into the ground. Since there is a critical state between the first form and the second form of the elastic plate, during the active reset process of the elastic plate, under the action of its own inertia, the elastic plate can quickly reach the second form, so that the second positioning needles in the middle of the elastic plate penetrate into the ground, thereby realizing the stable fixation of the legs on the ground, and thus improving the construction efficiency of the protective fence.

Description

Technical Field

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

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

[0003] In the prior art, a Chinese patent with the authorization announcement number CN219431545U discloses a building protective fence. In the disclosure document, through the settings of a fixed column, a spring, a first limiting block, a movable block and a positioning plate, when the fixed column is inserted into the card slot, the movable block will slide downward under the thrust, and when it slides to the inside of the card slot, the movable block will be restored by the thrust of the spring below the limiting plate. At the same time, a positioning plate is also provided on the surface of the fixed column to limit the fixing range. And in the disclosure document, the contact area between the fixed column and the ground is increased through a reinforcing plate, so as to enhance the stability of the protective fence on the ground. However, there is only an abutting relationship between the reinforcing plate and the ground. When an external force pushes the fixed column, the fixed column can still move relative to the ground, which easily causes the protective fence to lose its protective effect. When actually installing the reinforcing plate, in order to prevent the protective fence from losing its protective effect, pins are usually used to fix the reinforcing plate on the ground, so as to enhance the stability of the protective fence. However, when using pins to fix on the ground, construction workers need to knock each pin into the ground one by one, resulting in an increase in the overall construction period of the protective fence. Summary of the Invention

[0004] The present invention provides a safety protection device for road foundation pits to solve the problem of low efficiency in the construction process of existing protection devices.

[0005] The safety protection device for road foundation pits of the present invention adopts the following technical solutions:

[0006] A safety protection device for road foundation pits includes a fence, legs, support rods, elastic plates and driving members.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] Furthermore, a driving disk is fixedly arranged 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 axis direction, the driving disk can impact the rotating shaft.

[0013] Furthermore, a limiting block is arranged at one end of the driving rod away from the driving disk, and a limiting groove is arranged on the supporting leg. The limiting groove has a first section, a second section and a third section. When the limiting block is in the second section, the limiting block and the driving rod can rotate around their own axes; when the limiting block is in the first section, the transmission gear disengages from the driving gear; when the limiting block is in the second section and the third section, the transmission gear is in a state of engaging with the driving gear; initially, the limiting block is set to be in the first section.

[0014] Furthermore, the limiting block has a regular octagon structure, and the outlines of the third section and the first section are regular octagons.

[0015] Furthermore, the energy storage member is an energy storage spring. 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, the energy storage spring is arranged inside the first rod body, one end of the energy storage spring is fixedly connected to the first rod body, and the other end of the energy storage spring is fixedly connected to the second rod body; the energy storage spring is always in a compressed state.

[0016] Furthermore, there are two supporting legs, and the two supporting legs are arranged at both ends of the fence in the length direction.

[0017] The beneficial effects of the present invention are as follows: A road foundation pit safety protection device of the present invention includes a fence, legs, support rods, elastic plates, and a driving member. When installing the fence around the foundation pit, first place the legs fixedly connected to the fence vertically around the foundation pit, and then pierce the first positioning pins on the legs into the ground. Under the combined action of the hinge rods and the energy storage members, the ends of the two support rods away from the legs are in a state of abutting against the ground. In the initial state, both elastic plates are in the first form, and at this time, the second positioning pins and the third positioning pins on the elastic plates are not inserted into the ground. The driving member can drive the two elastic plates to deform simultaneously. When the driving member drives the elastic plates to deform, the convexity of the two elastic plates gradually increases, and when the convexity of the elastic plates increases, the restoring force of the elastic plates gradually increases. At this time, the hinge rods gradually shorten. When the elastic plates reach the preset deformation amount, the elastic plates actively reset, and the energy storage members drive the support rods to reset. When the elastic plates actively reset, the third positioning pins at the ends of the elastic plates are inserted into the ground. Since there is a critical state between the first form and the second form of the elastic plates, during the active reset process of the elastic plates, due to the inertia of the elastic plates themselves, the elastic plates can quickly reach the second form, so that the second positioning pins in the middle of the elastic plates are inserted into the ground, thereby realizing the stable fixation of the legs on the ground and improving the construction efficiency of the guardrail. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of a road foundation pit safety protection device provided by an embodiment of the present invention;

[0020] Figure 2 Front view of a road foundation pit safety protection device provided by an embodiment of the present invention;

[0021] Figure 3 For Figure 2 Cross-sectional view in the A-A direction in

[0022] Figure 4 For Figure 3 Partial enlarged view at B in

[0023] Figure 5 For Figure 2 Cross-sectional view in the C-C direction in

[0024] Figure 6 For Figure 5 Partial enlarged view at D in

[0025] Figure 7 The structural schematic diagram of a road foundation pit safety protection device provided by an embodiment of the present invention with some legs hidden;

[0026] Figure 8 The structural explosion diagram of a road foundation pit safety protection device provided by an embodiment of the present invention with some legs hidden;

[0027] Figure 9 is Figure 8 The partial enlarged view at position E in;

[0028] Figure 10 The state diagram of an elastic plate in the second form in a road foundation pit safety protection device provided by an embodiment of the present invention;

[0029] Figure 11 The cross-sectional view of the cooperation between the limit block and the limit groove in a road foundation pit safety protection device provided by an embodiment of the present invention.

[0030] In the figure: 110, fence; 120, leg; 121, first positioning pin; 130, support rod; 140, hinge rod; 150, elastic plate; 151, second positioning pin; 152, third positioning pin; 160, adjustment groove; 170, adjustment block; 210, drive rod; 220, drive gear; 230, transmission gear; 240, rotating shaft; 250, drive disk; 260, limit block; 270, limit groove; 280, energy storage spring. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] The serial numbers assigned to the components in this text itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and 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 should not be construed as a limitation to the present invention.

[0033] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] As Figures 1 to 11 shown, a kind of road foundation pit safety protection device provided by an embodiment of the present invention includes a fence 110, legs 120, support rods 130, elastic plates 150 and driving members.

[0035] The fence 110 includes a plurality of cross bars and a plurality of longitudinal bars. The plurality of cross bars are arranged in parallel at intervals, the plurality of longitudinal bars are arranged in parallel at intervals, the cross bars and the longitudinal bars are in the same plane and perpendicular to each other, and the intersections of the cross bars and the longitudinal bars are fixedly welded.

[0036] The legs 120 are arranged vertically. The legs 120 are fixedly connected to one of the longitudinal bars of the fence 110. A first positioning pin 121 is provided at the lower end of the legs 120. The first positioning pin 121 can penetrate into the ground. When installing the fence 110, the staff penetrates the first positioning pin 121 of the legs 120 into the ground, thereby realizing the pre-fixation of the legs 120.

[0037] There are two support rods 130. The two support rods 130 are spaced apart on both sides of the leg 120. One end of the two support rods 130 is close to each other. The close ends of the two support rods 130 are 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. 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 power storage member is provided on the hinge rod 140. The power storage member is always in a power storage state. The power storage member can drive the hinge rod 140 to always have a tendency to extend. Under the action of the power storage member, the hinge rod 140 can push against the support rod 130, so that the end of the support rod 130 away from the leg 120 abuts against the ground.

[0038] There are two elastic plates 150. One end of each elastic plate 150 is rotatably connected to the leg 120. And the connection position of the elastic plate 150 and the leg 120 is between the support rod 130 and the hinge rod 140. The other end of each elastic plate 150 is connected to a support rod 130. The elastic plate 150 can be deformed. The elastic plate 150 has a first state with an upward bulge and a second state with a downward depression. In the initial state, the elastic plate 150 is in the first state. When the support rod 130 rotates relative to the leg 120, the bending degree of the elastic plate 150 in the first state changes. In addition, the elastic plate 150 has a critical state between the first state and the second state. For example, when the elastic plate 150 changes from the first state to the second state, as an 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 the external force continues to be applied to the elastic plate 150, the elastic plate 150 quickly reaches the second state 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, both the second positioning pin 151 and the third positioning pin 152 penetrate into the ground. And there is a sequence when the second positioning pin 151 and the third positioning pin 152 penetrate into the ground. When the end of the support rod 130 touches the ground, the third positioning pin 152 on the elastic plate 150 first penetrates into the ground. Subsequently, under the action of inertia, the elastic plate 150 deforms from the first state to the critical state and quickly switches from the critical state to the second state. When the elastic plate 150 deforms to the second state, the second positioning pin 151 penetrates into the ground. When the second positioning pin 151 penetrates into the ground, there is an included angle between the direction in which the second positioning pin 151 penetrates into the ground and the direction in which the third positioning pin 152 penetrates into the ground, thereby improving the stability of the leg 120.

[0039] The driving member is used to change the degree of deformation of the elastic plate 150. Specifically, after the first positioning pin 121 penetrates into the ground, the driving member drives the support rod 130 to rotate on the leg 120. During this process, the degree of deformation of the elastic plate 150 gradually increases on the basis of the first form, and the energy storage degree of the energy 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 reversely on the leg 120. At the same time, the energy storage member pushes the support rod 130 to strike the ground. During the active reset process of the elastic plate 150, one end of the support rod 130 touches the ground, so that the third positioning pin 152 on the elastic plate 150 first penetrates into the ground. The elastic plate 150 can quickly reach the 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 pin 151 penetrates into the ground, and then both the second positioning pin 151 and the third positioning pin 152 on the elastic plate 150 penetrate into the ground.

[0040] For a kind of foundation pit safety protection device for roads of the present invention, when installing the fence 110 around the foundation pit, first place the leg 120 fixedly connected to the fence 110 vertically around the foundation pit, and then penetrate the first positioning pin 121 on the leg 120 into the ground. Under the combined action of the hinge rod 140 and the energy storage member, the ends of the two support rods 130 away from the leg 120 are in a state of abutting against the ground. In the initial state, both elastic plates 150 are in the first form. At this time, neither the second positioning pin 151 nor the third positioning pin 152 on the elastic plate 150 penetrates into the ground. The driving member can drive the two elastic plates 150 to deform simultaneously. When the driving member drives the support rod 130 to rotate on the leg 120, the two elastic plates 150 deform simultaneously, and the convex degree of the two elastic plates 150 gradually increases. And when the convex degree of the elastic plate 150 increases, the reset 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 reversely on the leg 120, and the energy 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 there is a critical state between the first form and the second form of the elastic plate 150, during the active reset process of the elastic plate 150, under the action of its own inertia, the elastic plate 150 can quickly reach the second form, so that the second positioning pin 151 in the middle of the elastic plate 150 penetrates into the ground, thereby realizing the stable fixation of the leg 120 on the ground, and thus improving the construction efficiency of the guardrail.

[0041] 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.

[0042] 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.

[0043] In one embodiment, the driving member includes a driving rod 210 and a driving gear 220. The driving rod 210 is connected to the leg 120. The driving rod 210 can rotate on the leg 120 and can also slide along its own axis direction on the leg 120. A transmission gear 230 is coaxially and fixedly arranged on the driving rod 210. The driving gear 220 is fixedly connected to the support rod 130. Initially, it is 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 leg 120. When the driving rod 210 is pulled to slide along its own axis direction, the transmission gear 230 meshes with the driving gear 220. When it is necessary to drive the support rod 130 to rotate on the leg 120, first pull the driving rod 210 to slide a certain distance along its own axis direction. After the driving rod 210 slides a certain distance along its own axis direction, the driving rod 210 can rotate on the leg 120. When the driving rod 210 rotates, through the meshing transmission of the driving gear 220 and the transmission gear 230, the support rod 130 can smoothly rotate on the leg 120. After the support rod 130 rotates a preset angle on the leg 120, both elastic plates 150 reach the preset deformation amount. Subsequently, push the driving rod 210 to slide along its own axis direction again, so that the transmission gear 230 and the driving gear 220 are disengaged, and then the support rod 130 performs active reset under the combined action of the elastic plate 150 and the hinge rod 140.

[0044] Further, a reversing shaft is rotatably arranged on the leg 120. The reversing shaft is arranged parallel and at an interval with 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. The reversing gear meshes with one of the driving gears 220, and the reversing gear also meshes with the transmission gear 230 at the same time. At this time, the transmission gear 230 meshes with one driving gear 220 and one reversing gear, so as to ensure that when the driving rod 210 rotates, both elastic plates 150 can deform simultaneously.

[0045] In one embodiment, a rotating shaft 240 is fixedly connected to the end of the elastic plate 150. The rotating shaft 240 is rotatably connected to the support leg 120. The rotating shaft 240 is arranged parallel to the driving rod 210. The rotating shaft 240 can slide along its own axis direction on the support leg 120. In the initial state, the adjusting block 170 on the elastic plate 150 is located in the adjusting groove 160. When the rotating shaft 240 slides along its own axis direction on the support leg 120, the adjusting block 170 on the elastic plate 150 is separated from the adjusting groove 160. When the first positioning pin 121 penetrates into the ground, the staff observes the height of the ground where the support rod 130 is 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 adjusting groove 160 where the adjusting 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 adjusting groove 160 where the adjusting block 170 corresponding to the lower ground is located. When the driving rod 210 is rotated, the adjusting block 170 needs to be located in the adjusting groove 160. After the driving rod 210 is rotated and the driving rod 210 is pushed again to slide along its own axis direction, the rotating shaft 240 slides along its own axis direction on the support leg 120, so that the adjusting block 170 is separated from the adjusting groove 160 at the same time.

[0046] In one embodiment, a driving disk 250 is fixedly arranged at the end of the driving rod 210. 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 axis direction, the driving disk 250 can impact the rotating shaft 240. Specifically, when the driving rod 210 is rotated, the convenience of driving the driving rod 210 can be improved by arranging the driving disk 250. To ensure that when the driving rod 210 slides along its own axis direction, the rotating shaft 240 can slide along its own axis direction at the same time, by arranging the driving disk 250 at the end of the driving rod 210 and adjusting the length of the rotating shaft 240, it is ensured that when the transmission gear 230 and the driving gear 220 are disengaged, the driving disk 250 can impact the rotating shaft 240, so that the sliding of the driving rod 210 along its own axis direction and the sliding of the rotating shaft 240 along its own axis direction are synchronized. Further, when the driving rod 210 needs to be rotated, the driving disk 250 is manually rotated. When the driving rod 210 needs to slide along its own axis direction, the driving disk 250 is manually pulled or pushed.

[0047] In one embodiment, a limiting block 260 is arranged at one end of the driving rod 210 away from the driving disk 250. A limiting groove 270 is arranged on the support leg 120. The limiting groove 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 groove 270 are communicated with each other. The first section, the second section and the third section of the limiting groove 270 are coaxially arranged. In the axial direction of the driving rod 210, with the attachment Figure 11For example, the first section is at the rightmost end of the limit groove 270, the second section is in 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 in the second section of the limit groove 270, the limit block 260 can rotate within the second section, and then the driving rod 210 can rotate around its own axis. When the limit block 260 is in the first or third section, the limit block 260 cannot rotate in the first or third section, and then 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 or third section, the transmission gear 230 and the driving gear 220 are in an engaged 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, first pull the driving rod 210 to slide a certain distance along its own axis, so that the limit block 260 enters the second section of the limit groove 270 from the first section of the limit groove 270. Then rotate the driving rod 210. After rotating the driving rod 210 by a certain angle, pull the driving rod 210 to slide a certain distance along its own axis again, so that the limit block 260 enters the third section of the limit groove 270 from the second section of the limit groove 270. Then push the driving rod 210 to reset in its own axis direction, so that the limit block 260 returns from the third section of the limit groove 270 to the first section.

[0048] In one embodiment, the limit block 260 has a regular octagon structure, and the outlines of the third section and the first section are regular octagons. By defining the outline of the limit block 260, it is ensured that when the elastic plate 150 reaches the preset deformation amount, the limit block 260 can enter the third section of the limit groove 270, and when the elastic plate 150 actively resets, the limit block 260 can smoothly enter the first section of the limit groove 270.

[0049] In one embodiment, the energy storage member is an energy storage spring 280. 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 inside of the first rod body. The energy storage spring 280 is arranged inside the first rod body. One end of the energy storage spring 280 is fixedly connected to the first rod body, and the other end of the energy storage spring 280 is fixedly connected to the second rod body. The energy storage spring 280 is always in a compressed state. Under the action of the energy storage spring 280, the articulated rod 140 always has a tendency to extend, so that the articulated rod 140 can push the support rod 130 to strike the ground.

[0050] In one embodiment, to further improve the stability of the fence 110, two legs 120 are provided, and the two legs 120 are arranged at both ends in the length direction of the fence 110.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A road foundation pit safety protection device, characterized in that: include: Fences; A leg, wherein the leg is vertically arranged, the leg is fixedly connected to the fence, and a first positioning needle is arranged at the lower end of the 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 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, 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.

Images