Stair fall prevention device

Abstract

A stair fall prevention device that uses the handrail pipe to prevent falls when someone is going down the stairs. [Solution] A stair fall prevention device characterized by having a pipe support cushion attached to the top surface of a handrail pipe that runs parallel to the person when the person falls down the stairs and misses a step.

Description

Technical Field

[0001] The present invention relates to a staircase fall prevention device that uses a handrail pipe to prevent a fall accident when a person descending a staircase in a station, building, etc. stumbles and falls.

Background Art

[0002] Currently, the method of preventing a fall accident on a staircase in a station, building, etc. is only to install a handrail pipe.

[0003] In Patent Document 1 (Japanese Patent No. 5004814, JP-A-2009-172301), on a steep staircase such as in a hydroelectric power plant, a handrail is provided alongside the staircase, and a fall prevention device is also attached thereto. However, these are for in-house facilities, and the method of use is to provide a protrusion on a stopper device and stop the device thereby. Since this damages the surface of the handrail, it cannot be introduced in public facilities.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] For the reasons as described above, there were the following problems. (a) Even if holding the handrail pipe with the hand, when falling, the hand will be released, causing a fall accident. Therefore, it is necessary to consider a prevention device to prevent reaching a fall even when falling. However, usually, this device is carried by a person, so it was difficult to make it small and lightweight. (b) When the device falls down the stairs, that is, when the device is pulled from the side with a force exceeding a certain amount, it was difficult to create a mechanism that would hold the device to the pipe without damaging the surface of the handrail pipe with the receiving cushion. This invention was made to solve these problems. [Means for solving the problem]

[0006] (Claim 1) To solve these problems, the stair fall prevention device according to the present invention comprises: a receiving roller 1 made of Delrin material with a diameter of 3 mm and a length of 20 mm, installed in the center of the device and acting as a guide roller that slides down the handrail pipe; an operating handle 2 made of SUS304 material with a diameter of 4 mm, U-shaped, installed on the right side of the device and connected to a safety rope attached to a person's body, transmitting the person's fall to the slide shaft 3; a slide shaft 3 made of SUS304 material with a diameter of 3 mm and a length of 40 mm, one end of which is connected to the operating handle 2, with two triangular grooves for receiving lock pins in the middle, transmitting the movement of the operating handle 2 to a connecting arm 8; a lock pin 4 made of SUS304 material with a diameter of 7 mm and a length of 16 mm, which positions the slide shaft 3 that is moved by the operating handle 2; a bias spring 5 made of SUS304 material with a diameter of 6 mm and a length of 20 mm, which applies a force to the lock pin 4 that resists the lateral pulling force of the slide shaft 3; and a 20 having a braking function. A stair fall prevention device comprising: a receiving cushion A6 and a receiving cushion B7 made of SUS304 material, with an ethylene propylene rubber sheet measuring H x 20W x 3t attached to them, which are in close contact with the surface of the handrail pipe; and a connecting arm 8 made of SUS304 material, measuring 45H x 14W x 8t, which transmits the movement of the slide shaft 3 when it moves due to the pulling force of the operating handle 2, and which allows the receiving cushion B7 to be in close contact with the handrail pipe; This device is characterized by the fact that it is placed in the center of the handrail pipe, a safety rope connected to the operating handle 2 is attached to the user's waist, and basically the user lightly holds the device placed on the handrail pipe with their left hand as they descend the stairs, and at the same time the device slides down along the slope, if the person misses a step while descending the stairs, the safety rope connected to the operating handle 2 pulls the operating handle 2, causing the descending device to hold onto the handrail pipe and prevent the person from falling.

[0007] (Claim 2) Furthermore, the overall structure and movement of the stair fall prevention device according to the present invention are as follows: When viewed from the front, the stair fall prevention device has two receiving rollers 1 arranged in the center, and these two receiving rollers 1 allow the stair fall prevention device to slide smoothly down the top surface of the handrail pipe. Also, a receiving cushion A6 is attached to the left side of the stair fall prevention device, facing the left side of the handrail pipe, and an ethylene propylene rubber sheet with a braking function is attached to its surface. On the right side, an operating handle 2 is attached to which a safety rope attached to the person's waist is connected in the event of a fall. A slide shaft 3 is attached to the tip of the operating handle 2, and a connecting arm 8 is attached to the connection between the operating handle 2 and the slide shaft 3, with a receiving cushion B7 attached to its tip. A lock pin 4 with a bias spring 5 attached is set in the middle of the slide shaft 3. The role of this lock pin 4 is that when a person falls and the safety rope pulls the operating handle 2, causing the operating handle 2 to move the slide shaft 3 to the right, the lock pin 4, which was set at point A (Figure 3), overcomes the force of the bias spring 5 and moves to point B (Figure 3), thereby securing the position at point B.

[0008] As a result, the connecting arm 8 of the stair fall prevention device according to the present invention also tilts to the right around its central pivot point, and the aforementioned receiving cushion B7 is attached to its tip, making it tightly contact with the right side of the handrail pipe. Similarly, the aforementioned receiving cushion A6 on the left side also makes tight contact with the left side of the handrail pipe as the operating handle 2 moves to the right. Therefore, the stair fall prevention device is also characterized by the fact that it can be stopped without damaging the surface of the handrail pipe due to the tight contact between the left and right receiving cushions A6 and receiving cushion B7.

[0009] When viewed from the front, the device has a pipe top support roller (A) in the center and a support roller (B) on the left side. This support roller (B) is equipped with a roller spring to apply pressure to balance the device's position on the left side of the pipe. An operating handle is provided on the right side of the device, with a slide shaft at its tip. A support cushion (B) is connected to this slide shaft via a connecting arm. A lock pin is set on the slide shaft (A), pressed down by a bias spring force. In this state, when the operating handle is operated, the bias spring is overcome by the pulling force of the operating handle (human weight), causing the lock pin to move from point A to point B. This movement also causes the connecting arm to move, and the support cushion (B) at its tip comes into close contact with the pipe surface. At the same time, the support cushion (A) also comes into close contact with the left side of the pipe, and the device stops on the pipe. Furthermore, the contact surfaces of the receiving cushions (A) and (B) that are in close contact with the pipe at this time are fitted with ethylene propylene rubber sheets that have a braking function, thereby strengthening the contact force without damaging the pipe. The above describes the stair fall prevention device. [Effects of the Invention]

[0010] When a person falls down the stairs, a stair fall prevention device attached to a rope on a waist belt detects the fall and holds the person to a pipe, preventing them from falling down the stairs. [Brief explanation of the drawing]

[0011] [Figure 1] This is a plan view showing the upper side of a stair fall prevention device according to one embodiment of the present invention. [Figure 2] This is a front view showing the front side of a stair fall prevention device according to one embodiment of the present invention. [Figure 3] This is an enlarged view of the lock pin portion of a stair fall prevention device according to one embodiment of the present invention. [Figure 4]This is a drawing showing the receiving cushion parts A and B of the staircase fall prevention device according to an embodiment of the present invention.

Embodiment for Carrying out the Invention

[0012] Hereinafter, an embodiment for carrying out the present invention will be described. First, the structure of the main parts of this device will be described in the order of the reference numerals in the drawings. 1. Receiving roller Outer shape: diameter 3 mm, length 20 mm, material: Duracon (white) 2. Operating handle Outer shape: diameter 4 mm, U-shaped, material: SUS304 3. Slide shaft Outer shape: diameter 3 mm, length 40 mm, material: SUS304 4. Lock pin Outer shape: diameter 7 mm, length 16 mm, material: SUS304 5. Bias spring Outer shape: diameter 6 mm, length 20 mm, material: SUS304 6. Receiving cushion A Outer shape: base part 30H × 30W × 7t, material: SUS304 Brake material part 20H × 20W × 3t, material: ethylene propylene rubber sheet 7. Receiving cushion B Outer shape: base part 30H × 30W × 7t, material: SUS304 Brake material part 20H × 20W × 3t, material: ethylene propylene rubber sheet 8. Connecting arm Outer shape: 45H × 14W × 8t, material: SUS304 Next, the overall structure and movement of this device will be described. (A) It is premised on using a handrail pipe. (B) When viewing this device from the front, two receiving rollers 1 are provided at the center part, and by these rollers 1, this device descends on the pipe. (C) On the left side of the device, a receiving cushion A6 is attached so as to face the left side surface of the pipe, and an ethylene-propylene rubber sheet 11 having a braking function is pasted on its surface. (D) On the right side of the device, there is an operating handle 2, and a slide shaft 4 is attached to its tip. Also, a connecting arm 8 and a receiving cushion B7 are connected to this slide shaft 4. Further, a lock pin 4 with a bias spring 5 attached is set on this slide shaft 3. The role of this lock pin 4 is that when a person falls and the rope pulls the operating handle 2, and the operating handle 2 moves the slide shaft 3 to the right direction, the lock pin 4 usually set at point A overcomes the bias spring force and moves to point B to secure the position at point B. As a result, the connecting arm 8 also tilts to the right direction, and the receiving cushion B7 at its tip adheres closely to the right side surface of the pipe. An ethylene-propylene rubber sheet 11 is also pasted on this receiving cushion B7. (F) In the above state, when a person's fall occurs, at the left side of the pipe, the receiving cushion A6 adheres closely to the left side surface of the pipe, and at the right side of the pipe, the receiving cushion B7 adheres closely to the right side surface of the pipe, and the device stops moving on the pipe. The present invention has the above structure. When using the present invention, place the device on the central part of the handrail pipe and attach the safety rope connected to the operating handle to the waist of the body. Basically, lightly hold the device placed on the handrail pipe with the left hand. When a person descends the stairs, at the same time, the device also slides down along the slope to the lower part. During this descent, if an accident occurs where a person steps off the stairs, the safety rope connected to the operating handle pulls the operating handle, and the device that was descending is held and stopped on the handrail pipe, preventing the person from falling.

Explanation of Reference Numerals

[0013] 1 Receiving roller 2 Operating handle 3 Slide shaft 4 Lock pin 5 Bias spring 6. Receiving cushion A 7. Receiving cushion B 8 connecting arms 9 Handrail pipe 10 pads 11 Ethylene propylene rubber

Claims

1. A receiving roller 1 made of Delrin material, with a diameter of 3 mm and a length of 20 mm, is installed in the center of the device and acts as a guide roller that slides down the handrail pipe. The device is installed on the right side and is connected to a safety rope attached to the person's body. The operating handle 2, made of SUS304 material and having a diameter of 4 mm, transmits the person's fall to the slide shaft 3. A slide shaft 3 made of SUS304 material, with a diameter of 3 mm and a length of 40 mm, is connected to the operating handle 2 at one end, has two triangular grooves for receiving lock pins in the middle, and transmits the movement of the operating handle 2 to the connecting arm 8. A lock pin 4 made of SUS304 material, with a diameter of 7 mm and a length of 16 mm, is used to position the slide shaft 3 which is moved by the operating handle 2, A bias spring 5 made of SUS304 material, with a diameter of 6 mm and a length of 20 mm, applies a force to the lock pin 4 that resists the lateral tensile force of the slide shaft 3, A 20H x 20W x 3t ethylene propylene rubber sheet with a braking function is attached, and receiving cushions A6 and B7 made of SUS304 material, which are in close contact with the surface of the handrail pipe, are attached. When the slide shaft 3 moves due to the pulling force of the operating handle 2, the movement is transmitted to the receiving cushion A6, and the connecting arm 8, made of SUS304 material with a width of 45H x 14W x 8t, is in close contact with the handrail pipe where the receiving cushion B7 is located. A stair fall prevention device equipped with, The device is placed in the center of the handrail pipe, and the safety rope connected to the operating handle 2 is attached to the user's waist. Basically, the user lightly holds the device on the handrail pipe with their left hand as they descend the stairs. As the device slides down along the slope, if the person misses a step during the descent, the safety rope connected to the operating handle 2 pulls the operating handle 2, causing the descending device to hold onto the handrail pipe and prevent the person from falling. A stair fall prevention device with the following features.

2. The overall structure and operation of this stair fall prevention device are as follows: When viewed from the front, this stair fall prevention device has two receiving rollers 1 arranged in the center, allowing it to slide smoothly down the top surface of the handrail pipe. A receiving cushion A6 is attached to the left side of the stair fall prevention device, facing the left side of the handrail pipe, and an ethylene propylene rubber sheet with a braking function is attached to its surface. On the right side, there is an operating handle 2 to which a safety rope attached to a person's waist is connected in the event of a fall, and a slide shaft 3 is attached to the tip of the handle. A safety rope is attached to the operating handle 2 and the slide shaft 3, and a connecting arm 8 is attached to the end of the connecting arm 8, with a receiving cushion B7 attached to its tip. A lock pin 4 with a bias spring 5 attached is set in the middle of the slide shaft 3. The role of this lock pin 4 is that when a person falls and the safety rope pulls the operating handle 2, causing the operating handle 2 to move the slide shaft 3 to the right, the lock pin 4, which was set at point A (Figure 3), overcomes the force of the bias spring 5 and moves to point B (Figure 3), thereby securing the position at point B. As a result, the connecting arm 8 also tilts to the right around its central pivot point, and the aforementioned receiving cushion B7 is attached to its tip, making it tightly contact with the right side of the handrail pipe. Similarly, the aforementioned receiving cushion A6 on the left side also makes tight contact with the left side of the handrail pipe as the operating handle 2 moves to the right. Therefore, this stair fall prevention device can be stopped without damaging the surface of the handrail pipe due to the tight contact between the left and right receiving cushions A6 and B7. A stair fall prevention device according to claim 1, characterized in that...

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