JPH10196259A - Overturning preventive stepladder having safety device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use it in a single operation, and improve safety by arranging a safety device to connect end parts of a safety belt of an operator, in a stepladder upper part which is supported by a pole capable of being housed with a simple structure having cushioning performance and has overhang members being collapsible auxiliary legs. SOLUTION: A safety device 1 is composed of a U-shaped back face device main body 1a having a hook member 1d to connect end parts of a safety belt 1e of an operator, a locking plate 1b which is locked on the upper part vicinity of this back face and whose other end is made vertically freely movable and a coil-shaped spring member 1c. When the locking plate 1b inclines to a pole 2 by being pressed by the spring member 1c, a through hole end part of the locking plate 1b presses the pole 2, and safe cushioning performance is imparted. Since the locking plate 1b is set at a right angle to the pole 2, it becomes vertically freely movable. The inside of a pole guide 2a where a fastening member 2b is arranged on a side wall, is supported through the pole 2 having a stopper 2c in a bottom part so as to be freely locked and penetrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention stepladder equipped with a safety device for preventing a worker on a stepladder from falling over.

[0002]

2. Description of the Related Art Conventionally, as a fall prevention stepladder with a safety device, there is a safety device for stepping up work with a real opening flat 6─62200, and a support cylinder is attached to a normal folding type stepladder having four ladder posts. The supporting column is supported by using an elastic body and a guide groove in the supporting cylinder, and a worker's safety belt is connected to the upper end of the supporting column.

[0003] As another conventional example, there is a stepladder with a fall prevention auxiliary member by the present inventor in the Japanese Patent Application No. 8-8438, and auxiliary foldable legs are provided on four ladder posts of a normal folding stepladder. , And had a lifeline mounting bracket that could be erected and surrendered on the upper part of the stepladder.

[0004]

SUMMARY OF THE INVENTION A conventional Japanese Utility Model 6-6
In the safety device for the step-up operation by the 200, an elastic body is provided inside a support cylinder for supporting a column connecting the safety belt,
Although it is a safety device with cushioning properties, it cannot be used unless it goes up to the upper part of the stepladder because the safety belt connecting part is fixed to the upper part of the column, and the structure is complicated. It is a separate part, has no storage mechanism such as folding, and must be set each time it is carried and used. It is very inconvenient and it is a normal folding stepladder without auxiliary legs. There was a problem that the stepladder sometimes fell.

A conventional stepladder with a fall prevention auxiliary member according to Japanese Utility Model Application No. 8-8438 is a stepladder having folding auxiliary legs, which is a lifeline mounting bracket capable of standing and yielding, but a lifeline mounting bracket having no cushioning property. Had the problem of

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, a fall prevention stepladder with a safety device according to the present invention comprises:
The safety device for connecting the ends of the safety belt of the worker is supported by a pole having a cushioning property and a simple structure that can be stored, and is provided on a stepladder having a projecting member that is a folding auxiliary leg. It is characterized by things.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A fall prevention stepladder with a safety device according to the present invention has a hook member for connecting an end of a safety belt as a lifeline for securing the safety of a worker on the stepladder, which is opened to the outside of the stepladder. A metal main body having an equal strength on the back surface of a U-shape, a locking plate locked near the upper portion of the rear surface and having the other end movable vertically, and a ring-shaped spring member between the locking plate and the lower portion of the device main body The safety device has a structure in which a pole penetrates through the locking plate, the device body and the center of the spring member, and has a stopper at the bottom. Locked and penetrated freely,
A step member as a work table is provided on the stepladder, the pole guide is supported by a supporting member together with a connecting plate for connecting the ladder posts on both sides, and a guide rail is provided inside the stepladder of the ladder post. Outriggers are also known as outriggers that have a structure that can be folded out on the outside of a stepladder in order to stably open a ladder with a plurality of tread members on the ground or other base,
An overhanging member for stably supporting the ladder is formed, and two rail base members are provided on the guide rail, and a base holding member such as a bolt penetrates a screw hole of the rail base member to form a bottom of the guide rail. One end of the overhanging member is pivotally mounted on the upper rail base member, and one end of the overhanging support member is pivotally mounted from a fixed point near the other end. One of the connecting plates connecting one pair of ladders using a connecting member to support and set the opening and closing of the stepladder on one of the pole sides. A vertically movable guide base member is provided on a vertical guide supported at a lower portion together with the connecting plate, and a stay is provided near an upper portion of the opposing ladder support, and a horizontal member is symmetrically provided between the stay and the guide base member. It is characterized by having a connected structure.

[0008] In the safety device in the fall prevention stepladder with the safety device according to the present invention, in the use state located above the pawl, the end of the safety belt as a no-load lifeline is connected to the hook member, and the spring member presses and engages. When the stopper plate is inclined with respect to the pole, the end of the through hole of the locking plate is pressed against the pole and stopped, and the worker falls down and a load due to weight is applied to the safety belt. Also, the safety device has a safe cushioning function in which the safety device falls down by a predetermined sliding drop and stops until the pressing force against the pole of the locking plate inclined by the spring member and the load are balanced. Can adjust the elastic force of the spring member and set it to a predetermined distance.
When the safety device is moved up and down with respect to the pole, the end of the locking plate and the lower part of the device body are sandwiched between the ends of the device with the gripping force of a finger or the like that can be used by a woman. It has the function of being able to move up and down freely at right angles.

The stepladder in the fall prevention stepladder with a safety device according to the present invention is also called an outrigger having a structure that can be folded outside the stepladder so that the ladder can be stably opened on a base such as the ground. The overhanging member to be supported is formed, and the distance of the overhanging member from the lower surface of the ladder support can be varied by adjusting the positions of the upper and lower two rail base members. The position and angle of the upper part can be adjusted to prevent the ladder from tipping over the uneven base. Furthermore, even if the operator falls, the stepladder can be stably supported and can be folded. It is characterized by.

In the fall prevention stepladder with the safety device according to the present invention, the stop member at the lower portion of the pole guide is loosened and the pole is lowered, the safety device and the pole are housed, and the base stopper members of all the rail base members are loosened to extend the overhang member. It can be housed inside the ladder support, push up the guide base member connecting the horizontal members on the vertical guide and close the stepladder, so that the entire fall prevention stepladder with safety device can be stored compactly.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a fall prevention stepladder with a safety device in use in the embodiment of the present invention, and FIG. (A) of the fall prevention stepladder is a side view, and (B) is a cross-sectional view of the xx 'plane. A safety device (1) for securing the safety of the worker on the stepladder is used as a lifeline of the worker. Safety belt (1
e) A metal main body (1a) having a hook-shaped member (1d) connecting the ends of the U-shaped rear surface opened to the outside of the stepladder and having the same strength as that of the metal device. A ring-shaped spring member (1c) is provided between the locking plate (1b) and the lower portion of the device body, and a center portion of the locking plate, the device body, and the spring member is provided with a pole ( 2) has a structure through which the spring member presses and the locking plate is inclined with respect to the pole, so that the end of the through-hole of the locking plate presses against the pole to provide a safe cushioning property. The safety device which has a stopping action, and which can be vertically moved with respect to the pole by applying an external force to the locking plate with a gripping force or the like so as to be perpendicular to the pole, has a stopper (2c) at the bottom. Guide (2b) provided with a stop member (2b) on the side wall through
a) An overhanging member (3), which is also referred to as an outrigger, which is supported so as to be able to lock and penetrate the inside, has a base member (3d) as a worktable at the upper part, and can be stored outside the ladder posts (3) on both sides.
The pole guide is supported by a supporting member (2d) together with a connecting plate (3e) for connecting a pair of ladders having b).

The stepladder in the fall prevention stepladder with a safety device according to the present invention has a guide rail on the inner side of the stepladder of the ladder post (3) and stabilizes the ladder provided with a plurality of step members (3a) between the ladder posts. An outrigger (3b), which is also called an outrigger and has a structure that can be folded outside the stepladder for installation on a base such as the ground, is formed on the guide rail. Rail base member (3j)
And a base stopper member (4a) such as a bolt penetrates the screw hole of the rail base member, presses the bottom of the guide rail, and has a movable structure so that it can be fixed freely. One end of the projecting member is pivotally connected, one end of the overhang support member (3c) is pivotally mounted from a fixed point near the other end, and the other end is pivotally mounted on the lower rail base member (3j). By adjusting the position of the rail base member, the distance of the overhang member from the lower surface of the ladder support can be changed, and the position and angle of the overhang member on the horizontal plane with respect to the ladder support can be adjusted. The ladder is installed on the base so as to prevent the ladder from overturning, and furthermore, the stepladder can be stably supported even when an operator falls and has a foldable structure.

In the fall prevention stepladder with a safety device according to the present invention, the opening and closing of the stepladder and the support and setting at the time of opening the leg are performed by connecting a pair of ladders using a connecting member (4).
A vertically movable guide base member (3j) is provided on a vertical guide (3f) supported at the lower portion together with one of the connecting plates on the pole (2) side, and a stay (3) is provided near the upper portion of the opposing ladder support (3). 3g), a horizontal member (3h) is symmetrically connected between the stay and the guide base member, the horizontal member becomes straight when the legs are opened, the guide base member stops at the lower portion of the vertical guide, is supported and set, and the legs are closed. Sometimes, the guide base member rises to the upper part of the vertical guide and the stays close to each other.

3A is a partially cut-away enlarged central sectional view of the fall prevention stepladder with a safety device according to the present invention, and FIG.
The safety device in the upper part of (A) is a safety device (1) in use in the upper position of the pole (2), and the end of the safety belt (1e) as a no-load lifeline is connected to the hook member (1d). A locking member (1) is provided near the upper part of the rear surface of the device body (1a) having the hook member on the U-shaped rear surface opened to the outside of the stepladder.
f), the locking plate (1b) is locked, and the other end is constituted by a ring-shaped spring member (1c) between the locking plate which can be freely moved up and down and the lower part of the apparatus main body. The pawl has a structure in which the pole penetrates the center of the plate, the apparatus body, and the spring member. The spring member presses and the locking plate is inclined with respect to the pole, so that the end of the through hole of the locking plate becomes the pole. The safety device (1) at the bottom of (A) stops the worker even if the operator falls and the load F due to the weight is applied to the safety belt.
The safety device has an operation of dropping by a slide head L and stopping until a position where the pressing force of the locking plate inclined by the spring member against the pole and the load F are balanced.
Adjusts the elastic force of the spring member and can be set at a predetermined distance of, for example, about 20 cm. When the safety device is moved up and down with respect to the pole, as shown in FIG. By gripping the end of the locking plate and the lower part of the apparatus main body with a gripping force f of a finger or the like that can be made by a woman, the locking plate can be made perpendicular to the pole and vertically movable.

FIG. 4 shows a state in which the safety device (1) and the pole (2) are housed and the stepladder is closed in the fall prevention stepladder with the safety device according to the present invention. (2a) Loosen the lower stop member (2b) and lower the pawl. When the stepladder is closed, loosen the stop members (4a) of all the rail base members (3i), and extend the overhang member (3).
b) is housed inside the ladder support (3), and the guide base member connecting the horizontal member (3h) on the vertical guide is pushed up to secure the ladder support.

[0016]

The present invention is embodied in the form described above and has the following effects.

The safety device in the step-prevention stepladder with the safety device according to the present invention has a safe cushion effect in which even if an operator falls, the safety device drops by a predetermined sliding head and stops. The head can be set to a predetermined distance,
In addition, when the safety device is moved up and down with respect to the pole, the gap between the end of the locking plate and the lower part of the device body is gripped by a finger or the like that can be held by a woman so that the device can be moved up and down freely. In addition, it has a simple structure and can be easily handled from the outside even in the case of failure. It is supported by a stowable pole, and is integrated with a stepladder, so that it can be used with one touch.

Since the safety device in the fall prevention stepladder with the safety device of the present invention is movable, a safety belt can be attached to a hook member before climbing the stepladder and used at an arbitrary position. Functioning and high safety, the hook member faces the inside of the stepladder, so the center of gravity of the worker at the time of the fall is located near the center of gravity of the stepladder, and safety is secured. It has the effect of preventing falling accidents by using a stepladder without anxiety and without losing balance.

Since the fall prevention stepladder with a safety device according to the present invention has a movable overhang member also called an outrigger for stably setting the open leg on a base such as the ground, the overhang member according to the space is provided. The stepladder can be extended, and the stepladder can be prevented from falling over the uneven base. In addition, the stepladder can be stably supported even when the worker falls, and the stability of the stepladder body has been greatly improved.

In the fall prevention stepladder with the safety device according to the present invention, the safety device and the pawl can be housed, all the overhanging members can be housed inside the stepladder, the stepladder can be closed, and the stairs can be stored and carried as a unit.

[Brief description of the drawings]

FIG. 1 is a front view of a fall prevention stepladder with a safety device in use showing an embodiment of the present invention.

FIG. 2A is a side view and FIG. 2B is a cross-sectional xx 'plan view of the step-prevention stepladder with a safety device, showing an embodiment of the present invention.

3A is a partially cut-away enlarged central cross-sectional explanatory view of a fall prevention stepladder with a safety device according to an embodiment of the present invention, in which the safety device is locked, and FIG.

FIG. 4 is a side view of the fall prevention stepladder with a safety device in a stored state according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Safety device 1a Device main body 1b Locking plate 1c Spring member 1d Hook member 1e Safety band 1f Locking hole 1g Locking member 2 Pole 2a Pole guide 2b Stopping member 2c Stopper 2d Supporting member 3 Ladder post 3a Stepping member 3b Overhang Member 3c Overhanging support member 3d Base member 3e Connecting plate 3f Vertical guide 3g Stay 3h Horizontal member 3i Rail base member 3j Guide base member 4 Connecting member 4a Base stop member L Sliding head F Load f Gripping force

Claims (1)

[Claims] 1. A hook member (1) for connecting a safety belt (1e).
d) The main body (1a) having a U-shape which is open to the outside of the stepladder on the back surface, and a locking plate (1b) which is locked near the upper portion of the rear surface and whose other end is free to move upward and downward between the lower portion of the device body The safety device (1) composed of the ring-shaped spring member (1c) has a structure in which a pole (2) can be locked and penetrated at the center of the components, and has a stopper (2c) at the bottom. A connection plate (3e) of a ladder post (3) on both sides of an upper part of a stepladder having a base member (3d), the inside of a pole guide (2a) having a stop member (2b) provided on a side wall through a pole so as to be locked and penetrably supported. The pole guide is supported by a plurality of support members (2d), and a foldable overhang member (3b) is formed on each ladder support, and two rail bases that can be fixed on guide rails on the back surface of the ladder support. A member is provided, and the overhang is provided on the rail base member at the top. Has one end pivotally connected, one end of the overhanging support member (3c) is pivotally connected from the vicinity of the other end, and the other end is pivotally mounted on the lower rail base member. A vertically movable guide base member is provided on a vertical guide (3f) supported at the lower part together with the connecting plate, and a stay is provided near the upper portion of the opposing ladder support, and a horizontal member is symmetrically provided between the stay and the guide base member. A fall prevention stepladder with a safety device, characterized by a structure in which the connected stepladder is equipped with the safety device.