Safety Barn for Construction

Abstract

The present invention relates to a safety railing for construction that detects the danger to a person colliding with the safety railing and protects them safely, and reduces costs by replacing only the damaged part of the safety railing. The invention comprises: a post vertically fixed to both sides of the floor, having a coupling groove formed on one side of the upper portion and a vertical locking slot formed on the other side; a guardrail having a connecting projection coupled to the coupling groove of the two posts, a locking pin member slidably coupled along the locking slot, and a tier line communicating with an internal hollow portion; a piezoelectric film attached to the outer surface of the guardrail to detect contact vibrations of the body; an accelerometer that is activated according to a signal output from the piezoelectric film and measures the rate of change of impact; a control unit that inspects and analyzes information input from the accelerometer and outputs an operation signal; and an airbag unit installed in the hollow portion of the guardrail and deployed through the tier line according to the operation signal of the control unit to protect a body colliding with the safety railing. The technical concept includes a pressure control valve that controls gas discharge to prevent deformation of the guardrail due to pressure increasing when the airbag unit deploys.

Description

Technology Field

[0001] The present invention relates to a safety railing for construction, and more specifically, to a safety railing for construction that detects the danger to a person colliding with the safety railing and protects them safely, and reduces costs by replacing only the damaged part of the safety railing. Background Technology

[0002] As is well known, safety railings are facilities installed in building openings, platforms, stairwells, verandas, etc., to prevent fall accidents.

[0003] Conventional safety railings include posts installed vertically on the floor and guide rails horizontally connecting the upper parts of the posts on both sides.

[0004] However, conventional safety railings had a problem in that they could cause serious injury because they directly transferred impact energy to the human body when a person collided with them.

[0005] In addition, conventional safety railings had the problem that if they were damaged or deformed by external impact, both the post and the guide rail had to be replaced, which increased replacement costs and took a considerable amount of time for the replacement work.

[0006] As a result, there is a recent demand for technology that can protect people colliding with safety railings and reduce costs by replacing only the damaged parts. Prior art literature

[0007] (0001) Republic of Korea Registered Patent No. 10-2466881 (Date of publication: November 14, 2022) The problem to be solved

[0008] The present invention has been devised to solve the conventional problems described above, and the objective of the present invention is to provide a safety railing for construction that detects the danger to a person colliding with the safety railing and protects them safely, and reduces costs by replacing only the damaged part of the safety railing. means of solving the problem

[0009] To achieve the above objective, the present invention has a technical concept comprising: a post vertically fixed to both sides of a floor, having a coupling groove formed on one upper side and a vertical locking slot formed on the other side; a guardrail having a connecting projection coupled to the coupling groove of both posts, a locking pin member slidably coupled along the locking slot, and a tier line communicating with an internal hollow portion; a piezoelectric film attached to the outer surface of the guardrail to detect contact vibrations of a body; an acceleration sensor activated according to a signal output from the piezoelectric film to measure the rate of change of impact; a control unit that inspects and analyzes information input from the acceleration sensor and outputs an operation signal; an airbag unit installed in the hollow portion of the guardrail and deployed through the tier line according to the operation signal of the control unit to protect a body colliding with the safety guardrail; and a pressure control valve that controls gas discharge to prevent deformation of the guardrail due to pressure increasing when the airbag unit is deployed.

[0010] The pressure control valve may include a valve housing having an inlet port and an outlet port for introducing expansion gas discharged from the airbag unit and discharging it through a gas discharge port formed in the guardrail, a disc valve coupled inside the valve housing to open and close the inlet port, and a valve spring that elastically supports the disc valve to open the inlet port and discharge it to the outside through the gas discharge port when the gas pressure introduced from the airbag unit reaches a preset threshold value.

[0011] The locking slot may include a sliding slot formed vertically long at the top of one side of the post to guide the vertical sliding of the locking pin member, and a pin slot formed on the inner lower side of the sliding slot to engage the locking pin member.

[0012] The locking pin member may include a locking pin penetrating the other end of the guardrail so as to slide vertically along the sliding slot and engage with the pin slot, a pressure spring elastically pressing the locking pin engaged with the pin slot, and a release lever connected to release the locking pin pressed by the pressure spring from the pin slot.

[0013] The airbag unit may include an igniter that ignites according to an operating signal of the control unit, an inflator that generates expansion gas upon ignition by the igniter, and an airbag cushion that is inflated by the gas provided by the inflator and deploys through a tear line to protect a body colliding with a safety railing. Effects of the invention

[0014] According to the present invention implemented with the above-described solution, the following effects can be expected.

[0015] First, the danger is detected by the piezoelectric film and acceleration sensor before a collision with the body, and then the airbag unit is deployed, so life can be protected by mitigating the impact on the body and preventing injury and serious accidents through a preemptive response.

[0016] Second, since it is possible to distinguish between simple contact and dangerous situations such as actual falls or collisions through the two-stage detection process of the piezoelectric film and the acceleration sensor, unnecessary operation of the airbag unit can be prevented, thereby reducing costs.

[0017] Third, when the internal pressure of the guardrail exceeds the set pressure, the pressure control valve operates automatically to release excess gas to the outside, thereby preventing deformation or damage to the guardrail due to overpressure and ensuring structural stability, which can reduce costs. Brief explanation of the drawing

[0018] FIG. 1 is a front view showing a safety railing according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing the AA line cross-section of FIG. 1. FIG. 3 is a cross-sectional view showing a cross-section of the main part of FIG. 1. FIG. 4 is an enlarged view showing part 'B' of FIG. 3. Figure 5 is an operational diagram showing the operating state of Figure 4. FIG. 6 is an enlarged view showing part 'C' of FIG. 3. FIG. 7 is an enlarged view showing part 'D' of FIG. 3. FIG. 8 is an operational diagram showing the operating state of FIG. 7. FIG. 9 is a block diagram showing the control relationship of a safety railing according to an embodiment of the present invention. FIG. 10 is an operational diagram showing the inflation and deployment states of the airbag unit in FIG. 2. Specific details for implementing the invention

[0019] In order to fully understand the present invention, preferred embodiments of the present invention will be described below with reference to the attached drawings.

[0020] Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments described in detail below. These embodiments are provided to more fully explain the present invention to those with average knowledge in the art.

[0021] Accordingly, it should be noted that the shapes of components depicted in the drawings may be exaggerated to emphasize clearer explanations, and that identical members may be shown with the same reference numeral in each drawing.

[0022] In addition, detailed descriptions of known functions and configurations that are deemed to unnecessarily obscure the essence of the invention may be omitted.

[0023] A safety railing (100) for construction according to an embodiment of the present invention includes a post (110), a guardrail (120), a piezoelectric film (140), an acceleration sensor (141), a control unit (142), an airbag unit (150), and a pressure control valve (160).

[0024] Referring to FIGS. 1 and 2, posts (110) are vertically fixed to both the left and right sides of the floor (ER) of a building, including openings, platforms, stairwells, verandas, etc. A plurality of support rails (101) are connected at predetermined intervals to the lower parts of the posts (110) on both sides.

[0025] Referring to FIG. 3, a coupling groove (111) is formed on one side of the upper part of the post (110) to which a coupling projection (122) of a guardrail (120) described later is coupled, and a vertical locking slot (112) is formed on the other side of the upper part to which a locking pin member (130) of a guardrail (120) described later is slidably coupled.

[0026] Referring to FIG. 4, the locking slot (112) includes a sliding slot (112a) that is vertically elongated at the top of one side of the post (110) to guide the vertical sliding of the locking pin member (130), and a pin slot (112b) that is formed at the bottom inner side of the sliding slot (112a) to catch the locking pin member (130).

[0027] Referring to FIG. 6, a bus bar (113) is provided on one side of the upper portion of the post (110) adjacent to the coupling groove (111), and a pogo pin (123) described later is electrically connected thereto. A power line (102) supplied through the interior of the post (110) is connected to the bus bar (113).

[0028] The guardrail (120) is implemented as a tube or circular tube having a hollow portion (120a) inside, and horizontally connects the upper portions of the two posts (110).

[0029] Referring to FIG. 1, a tear-line (121) is formed on the front of the guardrail (120) so as to be connected to the hollow portion (120a) and the airbag unit (150) is deployed. Optionally, the tear-line (121) is formed across the front and upper surface of the guardrail (120) so that the face and chest of the body can be protected simultaneously when the airbag unit (150) is deployed.

[0030] Referring to FIGS. 3 and 6, a connecting projection (122) is provided at one end of the guardrail (120) and is fitted into the connecting groove (111) of the post (110). Through this, the position where the guardrail (120) is connected to the post (110) can be easily set. A pogo pin (123) is provided at one end of the guardrail (120) adjacent to the connecting projection (122) and is electrically connected to the bus bar (113) of the post (110). As a result, power can be supplied to the piezoelectric film (140), acceleration sensor (141), control unit (142), and airbag unit (150) without separate wiring work.

[0031] Referring to FIG. 3, a locking pin member (130) is provided at the other end of the guardrail (120) and is slidably coupled to the locking slot (112) of the post (110).

[0032] Referring to FIG. 4, the locking pin member (130) includes a locking pin (131) that penetrates the other end of the guardrail (120) so as to slide vertically along the sliding slot (112a) and engage with the pin slot (112b), a pressure spring (132) that elastically presses the locking pin (131) engaged with the pin slot (112b), and a release lever (133) connected to release the locking pin (131) pressed by the pressure spring (132) from the pin slot (112b).

[0033] The locking pin (131) includes a pin bolt (131a) that engages with a pin slot (112b) by passing through a pin hole (124) formed at the other end of the guardrail (120), a pin rod (131b) connected to the inner end of the pin bolt (131a), and a bolt flange (131c) formed between the pin bolt (131a) and the pin rod (131b) to prevent the pin bolt (131a) from coming loose. A tapered tip is formed at the outer end of the pin bolt (131a) to guide the smooth sliding of the pin bolt (131a) as it enters the sliding slot (112a) and to reduce friction. The pin rod (131b) is formed in the shape of a long horizontal rod, with the outer end connected to the pin bolt (131a) and the inner end connected to the release lever (133). The bolt flange (131c) is blocked on the inner side of the pinhole (124) and prevents the pin bolt (131a), which is pressed by the pressure spring (132), from coming loose.

[0034] The pressure spring (132) is implemented as a compression coil spring, with one end supported by a bolt flange (131c) and the other end supported by a support plate (125) formed inside the guardrail (120).

[0035] The upper end of the release lever (133) is connected to the inner end of the pin rod (131b), and the lower end passes through the lever slit (126) formed on the bottom surface of the guardrail (120). Through this, a user or operator can rotate the release lever (133) from the outside of the guardrail (120) to release the locking pin (131) engaged in the pin slot (112b).

[0036] The piezoelectric film (140) is attached to the outer surface of the guardrail (120) and detects vibrations caused by contact or impact of the body first.

[0037] Optionally, the piezoelectric film (140) may be attached in a stripe shape to the front surface of the guardrail (120) where body contact is frequent, thereby reducing noise and increasing sensitivity.

[0038] Since the reaction speed of the piezoelectric film (140) is very fast in nanoseconds (ns), the minute vibrations that occur at the moment the body comes into contact with the guardrail (120) are converted into electrical signals and output to the acceleration sensor (141).

[0039] The acceleration sensor (141) is a secondary sensing device that works together with the piezoelectric film (140) and measures the rate of change of impact (slope of acceleration) using the signal output from the piezoelectric film (140) as a trigger.

[0040] It is preferable that the acceleration sensor (141) be installed in the hollow part (120a) of the guardrail (120) so that vibrations are transmitted well.

[0041] The acceleration sensor (141) analyzes the rate of change of impact input from the piezoelectric film (140) to determine whether it is a simple contact (placing a hand on or leaning against the guardrail (120)) or a dangerous situation such as an actual fall or collision.

[0042] Based on the analysis results of the acceleration sensor (141), the airbag unit (150) can be deployed before the body completely hits the safety railing (100).

[0043] Since a proactive response is possible through the combination of the acceleration sensor (141) and the piezoelectric film (140), the body can be protected from completely colliding with the hard safety railing (100).

[0044] The control unit (142) inspects and analyzes information input from the acceleration sensor (141) and outputs an operation signal to the airbag unit (150).

[0045] Optionally, the control unit (142) can compare and analyze the signal generation time of the piezoelectric film (140) and the output change pattern of the acceleration sensor (141) to predict the expected collision time, calculate this, and output an operation signal to the airbag unit (150) before the body collides with the guardrail (120).

[0046] Here, the acceleration sensor (141) calculates the rate of change of acceleration during a set threshold time from the point in time when a signal is input from the piezoelectric film (140), and the control unit (142) can determine that the rate of change of acceleration exceeds a preset accident threshold curve, and if it is a dangerous situation in the pre-collision stage, output an operation signal to fully inflate the airbag unit (150) before the body physically collides with the guardrail (120).

[0047] Referring to FIGS. 1 to 3, the airbag unit (150) is installed in the hollow portion (120a) of the guardrail (120) and is deployed through the tear line (121) to protect a body colliding with the safety railing (100) according to an operation signal from the control unit (142).

[0048] Referring to FIG. 9, the airbag unit (150) includes an igniter (151) that ignites according to an operating signal of a control unit (142), an inflator (152) that generates expansion gas by ignition of the igniter (151), and an airbag cushion (153) that is expanded by the gas provided by the inflator (152) and deployed through a tear line (121) to protect a body colliding with a safety railing (100).

[0049] The igniter (151) generates a spark by applying current to the ignition circuit according to the operating signal of the control unit (142).

[0050] The inflator (152) generates expansion gas by burning a gas generator with a flame generated by the igniter (151) and supplies this expansion gas into the interior of the airbag cushion (153).

[0051] The airbag cushion (153) is inflated by gas supplied from the inflator (152) and spreads out over a wide area toward the upper and lower front of the guardrail (120) as shown in FIG. 10, thereby protecting the body colliding with the safety railing (100).

[0052] The deployment of these airbag units (150) is completed within 0.01 to 0.03 seconds after physical contact with the guardrail (120).

[0053] The pressure control valve (160) controls the gas discharge to prevent deformation of the guardrail (120) due to the pressure increasing when the airbag unit (150) deploys.

[0054] Referring to FIG. 3, a pressure control valve (160) is installed in the hollow portion (120a) of the guardrail (120) so as to be connected to the airbag unit (150).

[0055] Referring to FIG. 7, the pressure control valve (160) includes a valve housing (165) having an inlet port (161) and an outlet port (162) to introduce expansion gas discharged from an airbag unit (150) and discharge it through a gas discharge port (126) of a guardrail (120), a disc valve (163) coupled inside the valve housing (165) to open and close the inlet port (161), and a valve spring (164) that elastically supports the disc valve (163) to open the inlet port (161) and discharge it to the outside through the gas discharge port (126) when the gas pressure introduced from the airbag unit (150) reaches a preset threshold value.

[0056] An inlet hole (161) is formed on the left side of the valve housing (165) and connected to the airbag unit (150) via an exhaust pipe (150a). A valve seat (160a) is provided on the inner surface of the inlet hole (161) to accommodate a disc valve (163). An exhaust hole (162) is formed on the lower side of the valve housing (165) to pass through a gas discharge hole (126) formed on the bottom surface of the guardrail (120) toward the floor (ER). Here, the gas discharge hole (126) is formed on the bottom surface of the guardrail (120) to discharge gas toward the floor (ER) in a direction different from the deployment direction of the airbag unit (150), thereby protecting pedestrians from gas discharge.

[0057] The disc valve (163) is coupled to the inside of the valve housing (165) so as to be movable left and right so as to be seated on the valve seat (160a), thereby closing or opening the inlet port (161).

[0058] The valve spring (164) is implemented as a compression coil spring, with one end supported on one side of the disc valve (163) and the other end supported on the inner surface of the valve housing (165).

[0059] These valve springs (164) are made of a predetermined elastic modulus in order to set the opening pressure of the pressure control valve (160) to be higher than 'a pressure sufficient to fully inflate the airbag unit (150)' and lower than 'the yield strength of the guardrail (120) material'.

[0060] Normally, the disc valve (163) seals the inlet port (161) by the elastic force of the valve spring (164).

[0061] When the airbag unit (150) is operated, if the pressure of the expansion gas generated in the inflator (152) exceeds the set pressure of the valve spring (164), the disc valve (163) moves to open the inlet port (161) as shown in FIG. 8, so that the gas exceeding the set pressure is discharged to the outside through the discharge port (162) and the gas discharge port (126).

[0062] Accordingly, the pressure control valve (160) can prevent structural deformation such as the guardrail (120) expanding or bursting due to the gas pressure of the airbag unit (150).

[0063] The operation of the embodiment of the present invention configured as described above will be explained in detail with reference to the attached drawings as follows.

[0064] First, the piezoelectric film (140) immediately detects micro-vibrations that occur when the body comes into contact with or approaches the safety railing (100), and the piezoelectric film (140) reacts in nanoseconds.

[0065] Next, an acceleration sensor (141) activated by the signal of the piezoelectric film (140) analyzes the rate of change of impact to distinguish between simple contact and dangerous collision (fall / sudden collision).

[0066] Next, the control unit (142) determines whether there is a danger based on the data from the acceleration sensor (141), and when a dangerous situation is determined, it outputs an operation signal to the airbag unit (150).

[0067] Then, the airbag cushion (153) is inflated within 0.01 to 0.03 seconds by the expansion gas generated by the operation of the igniter (151) and inflator (152) of the airbag unit (150) and unfolds through the tear line (121) as shown in FIG. 10, so that a cushioning layer is formed before the body completely collides with the safety railing (100).

[0068] At this time, when the internal pressure of the guardrail (120) exceeds the set pressure due to the operation of the airbag unit (150), the disc valve (163) opens the inlet port (161) by contracting the valve spring (164), so that the gas exceeding the set pressure is discharged to the outside through the gas discharge port (126) of the guardrail (120).

[0069] As a result, the deformation of the guardrail (120) and structural stability can be ensured.

[0070] Meanwhile, when attaching the guardrail (120) to the two posts (110), the pogo pin (123) and the bus bar (113) are physically connected, so power can be easily supplied to the piezoelectric film (140), acceleration sensor (141), control unit (142), and airbag unit (150) without separate wiring work.

[0071] On the other hand, the guardrail (120) can be easily separated or connected to the post (110) by the locking pin member (130), thereby improving the convenience of the work.

[0072] The embodiments of the present invention described above are merely illustrative, and those skilled in the art will readily understand that various modifications and equivalent alternative embodiments are possible therefrom.

[0073] Therefore, it can be well understood that the present invention is not limited only to the forms mentioned in the detailed description above.

[0074] Accordingly, the true scope of technical protection of the present invention should be determined by the technical concept of the appended claims, and the present invention should be understood to include all variations, equivalents, and substitutions within the scope of the technical concept defined by the appended claims. Explanation of the symbols

[0075] 100 : Safety railing 110 : Post 120 : Guardrail 130 : Locking pin member 140 : Piezoelectric film 141 : Accelerometer 142 : Control unit 150 : Airbag unit 160 : Pressure control valve

Claims

Claim 1 A safety railing for construction comprises: a post vertically fixed to both sides of the floor, having a coupling groove formed on one side of the upper portion and a vertical locking slot formed on the other side; a locking pin member that slides along the locking slot and a coupling projection coupled to the coupling grooves of the two posts, and a guardrail having a tier line communicating with an internal hollow portion; a piezoelectric film attached to the outer surface of the guardrail to detect contact vibrations of the body; an acceleration sensor that is activated according to a signal output from the piezoelectric film to measure the rate of change of impact; a control unit that inspects and analyzes information input from the acceleration sensor and outputs an operation signal; an airbag unit installed in the hollow portion of the guardrail and deployed through the tier line according to the operation signal of the control unit to protect a body colliding with the safety railing; and a pressure control valve installed in the hollow portion of the guardrail to be connected to the airbag unit and controlling gas discharge to prevent deformation of the guardrail due to increased pressure inside the guardrail when the airbag unit is deployed, wherein the pressure control valve A safety railing for construction, characterized by comprising: a valve housing having an inlet hole and an outlet hole for introducing an expansion gas discharged from the airbag unit and discharging it through a gas discharge hole formed in the guardrail; a disc valve coupled inside the valve housing to open and close the inlet hole; and a valve spring that elastically supports the disc valve to open the inlet hole and discharge the gas to the outside through the gas discharge hole when the gas pressure introduced from the airbag unit reaches a preset threshold value. Claim 2 delete Claim 3 A safety railing for construction according to claim 1, wherein the locking slot comprises a sliding slot formed vertically elongated from the upper side of one side of the post to guide the vertical sliding of the locking pin member, and a pin slot formed inwardly at the lower end of the sliding slot to engage the locking pin member, and the locking pin member comprises a locking pin penetrating the other end of the guardrail to slide vertically along the sliding slot and engage the pin slot, a pressure spring elastically pressing the locking pin engaged in the pin slot, and a release lever connected to release the locking pin pressed by the pressure spring from the pin slot. Claim 4 A safety railing for construction according to claim 1, wherein the airbag unit comprises an igniter that ignites according to an operating signal of the control unit, an inflator that generates expansion gas by ignition of the igniter, and an airbag cushion that is inflated by the gas provided by the inflator and deployed through a tear line to protect a body colliding with the safety railing.

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