JP2012161443A - Safety device and handrail hooking the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device and a handrail hooking the same which facilitate going up and down stairs regardless of the presence of a post, with which a worker is prevented from falling down from the stairs, and which are easy to produce.SOLUTION: The safety device is attached to a safety belt put on the worker to prevent falling down or the like of the worker, and the handrail hooks the safety device. The handrail 100 includes: a handrail frame portion 101 being a tubular member 110 provided with an axial slit portion 114; and supporting members 105 each supporting the handrail frame portion at an appropriate height. The safety device 10 includes: a hooking member 11 inserted into and movably mounted to a hollow part of the tubular member of the handrail frame portion; a rope-shaped member 15 attached to one end side of the hooking member; and a locking member 13 attached to the other end side of the rope-shaped member and locked to the safety belt. The hooking member is movably mounted in the handrail frame portion, and the worker is allowed to be moved while connecting the safety belt to the handrail.

Description

  The present invention relates to a safety device used when ascending / descending a staircase and the like, and in particular, connecting a handrail or the like that has been processed to a safety belt worn by an operator to prevent the operator from falling off the staircase. The present invention relates to a safety device and a handrail for engaging the safety device.

Conventionally, handrails are provided on stairs, windows, and verandas. These handrails are classified into those having functions as auxiliary handrails for supporting the body etc. by gripping with hands, and those having functions as fall prevention fences for preventing fall to the outside depending on the purpose of installation. Is done.
The handrail installed on the stairs functions as an auxiliary handrail that assists in raising and lowering the stairs and prevents falling down. It also has a function as a fall prevention fence to prevent the fall to the outside.

The size of the staircase of a building is stipulated in the Building Standard Law Enforcement Ordinance and varies depending on the purpose of the building. Normally, the height of the kick-up and the size of the tread surface are specified so that it is safe and can be lifted without grabbing the handrail. Is used.
However, the above-mentioned provisions are not applicable to special stairs used for special purposes. For example, the staircase around the side of the crude oil tank used for equipment inspection work, etc. is relatively steep. The handrail is provided along the end of the tread plate on the opposite side of the tank by a support column, and these have a function as an auxiliary handrail and a function as a fall prevention fence.
Still, the crude oil tank stairs are outside stairs, which can be beaten during strong winds and lose balance, or can slip and fall from the stairs when it rains. Moreover, depending on the case, it may fall from the top of the railing of a handrail to the downward direction outside a staircase.

In order to prevent such an accident, it is desirable to wear a safety belt and to hook a hook or the like at the tip of the rope part of the lifeline to the handrail. However, since the handrail is attached by a plurality of support posts, the hook is caught at the place where the support posts are installed. Therefore, it is necessary to remove the hook at the place where the column is installed and to hang it again. Moreover, since the support | pillar also has a function as a fall prevention fence, it is attached to every step, for example, at a narrow interval. Therefore, when the tank is large, it must be re-applied several tens of times while moving from the lower part of the stairs to the upper part of the tank or from the upper part of the tank to the lower part of the stairs. Since it is a burden on the worker and the work itself is disturbed, it is not actually used. In other words, no measures are taken to prevent a crash, and if anything happens, there is nothing but to support the body by hand.
In addition, even when the handrail is attached to the wall by a support member instead of a support column, the hook will be caught at the installation location of the support member when it is raised and lowered. It needs to be multiplied and it takes time and effort.

  As an apparatus for assisting the raising and lowering of stairs, for example, Japanese Patent Application Laid-Open No. 10-179663 “Stair climbing assistance apparatus” has been proposed. This stair-climbing assist device includes a handrail-shaped guide rail installed inclined along the stairs, a slider portion that is slidable while being guided by the guide rail, a handle portion that is attached to the side surface, and a slider portion When the slider slides in the stairs ascending direction, it is equipped with a one-way motion restricting means that locks or resists when the slider part slides in the stairs descending direction. It is a stair lift assist device that can assist. It attaches to a handrail and assists in raising and lowering stairs safely.

Japanese Patent Laid-Open No. 10-179663

However, since the “stair climbing assist device” assists the lifting of the staircase also as a rehabilitation operation, it restricts the lifting operation more than necessary to be used by workers such as equipment inspection. There was a problem that.
Further, since the configuration of the slider portion described above is complicated, it is difficult to manufacture and is not economical. And if the handle part is released for some reason, there is a problem that the function as an auxiliary handrail cannot be exhibited.

  The present invention has been proposed to solve the above-described problems. That is, an object of the present invention is to provide an easy-to-manufacture safety device and a handrail for engaging the same, which can be easily moved up and down regardless of the presence of a column and can prevent a worker from falling from the stairs. There is to do.

  The safety device according to the first aspect of the present invention for achieving the above object and the handrail for engaging the safety device are attached to a safety belt worn by the worker, and safety for preventing the operator from falling or falling. The handrail (100, 200, 300) is a tubular member (110) provided with a slit portion (114) in the axial direction. 201, 202, 301) and a support member (105) for supporting the handrail frame portion at an appropriate height, and the safety device (10, 10x, 20, 30) is a tubular member of the handrail frame portion. The engaging member (11, 12, 21, 31) that is inserted into the hollow portion (112) and is movably attached, the rope-like member (15) attached to one end of the engaging member, and the rope Attached to the other end of the shaped member and hooked to the safety belt The engaging member is movably mounted in the handrail frame portion so that an operator can move while maintaining a state in which a safety belt is connected to the handrail. It is characterized by that. In addition, the slit portion (114) may be provided with notches (116, 316) in the lower portion (114b) downward.

  The safety device according to the second aspect of the present invention and the handrail for engaging the safety device according to the first aspect in which the notches (116, 316) are provided are provided in the space of the slit portion (114). A locking rod (218, 218x) is disposed substantially parallel to the slit portion. The handrail (200) further includes a moving fastener (219) for holding the locking rod (218, 218x) and the rope-shaped member (15) movably along the locking rod. May be.

  In the safety device of the third aspect of the present invention and the handrail for engaging the safety device, the rope-like member (15) has a substantially circular cross section in the first aspect, and the notch (316) The length of the perpendicular between the tubular members (110) in the opening portion (316a) is substantially the same as the cross-sectional diameter of the rope-shaped member. The notch (316) may be further provided in the upper part (114a) of the slit (114).

  In the safety device (10x), a plurality of rotating bodies (16) are further disposed on the surface of the engaging member (12), and the engaging member is turned into the tubular member (110) by rotating the rotating body. ) May be configured to move.

According to the safety device of the first aspect and the handrail for engaging the safety device, the safety belt and the handrail (100, 200, 300) worn by the operator are provided by the safety device (10, 10x, 20, 30). ) Can be easily connected, and the operator can be prevented from falling.
Further, the worker only needs to perform the work of attaching the safety device (10, 10x, 20, 30) before going up the stairs, and can move regardless of the presence of a column or the like. Installation and removal can be done easily, so it can be done without taking time, and the burden on the operator is light. Further, it is possible to process the existing handrail into the structure of the handrail (100, 200, 300), or to provide the handrail frame portion (101, 201, 202, 301) on the column upper step side of the existing handrail. . Since these safety devices (10, 10x, 20, 30) and the handrails (100, 200, 300) for attaching the safety devices (10, 10x, 20, 30) have a simple structure, they are easy to manufacture and economical.
Furthermore, it is possible to prevent the operator from falling from the stairs by providing the notches (116, 316) in the lower part (114b) of the slit part (114).

  According to the safety device of the second aspect and the handrail for engaging the safety device, the locking rod (218, 218x) is disposed in the space of the slit portion (114), so that the operator can use the safety device (20). The stairs can be moved without paying attention to the position of the rope-like member (15) in the slit portion (114) of the tubular member (110) by paying attention to the position through which the latching member (13) is passed. can do.

  Furthermore, if it is set as the structure provided with the movement fastener (219), since a rope-like member (15) will easily remove | deviate from a movement fastener (219) when it falls, it will reduce the impact which acts on an operator more. Can do.

  According to the safety device of the third aspect and the handrail for engaging the safety device, the length of the perpendicular between the tubular members (110) in the opening (316a) of the notch (316) is the rope-shaped member (15 ) Is substantially the same as the diameter of the cross section. Therefore, it can prevent that a rope-shaped member (15) falls into a notch part (316) at the time of stair climbing. Moreover, if the notch part (316) is provided also in the upper part (114a) of a slit, it can prevent that an operator falls from the upper direction of a handrail (300) to the stairway outer side.

  If the plurality of rotating bodies (16) are arranged on the surface of the engaging member (12) of the safety device, the area in contact with the inner wall surface of the tubular member (110) is reduced, so that friction can be reduced. The engaging member (12) can be moved more smoothly.

It is the schematic front view which showed the state at the time of use of the safety gear of Example 1, and the handrail which fastens this safety gear. BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed the safety gear of Example 1, and the handrail which engages with this safety gear, (a) is a description perspective view of a safety gear, (b) is the front view of the handrail seen from the stairs side. It is explanatory drawing which showed the detail of the handrail frame part of Example 1, (a) is an enlarged view of the broken-line circle | round | yen part of FIG.2 (b), (b) is an enlarged view in the AA part of FIG.2 (b). Sectional drawing, (c) is explanatory perspective view of a notch part, (d) is the right view and left view of a handrail frame part. It is the schematic which showed the relationship between a tubular member, the engaging member of a safety gear, and a rope-shaped member when an operator raises / lowers stairs, (a) shows the state which removed the upper half of the tubular member An explanatory top view and (b) are explanatory sectional views in a BB section of (a). It is the schematic which showed the relationship between the tubular member, the engaging member of a safety gear, and a rope-like member when an operator falls on the stairs, (a) is the state which removed the upper half of the tubular member. The explanatory top view to show, (b) is explanatory sectional drawing in CC section of (a). It is the schematic about the modification of the safety device of Example 1, (a) is a perspective view of a safety device, (b) is explanatory sectional drawing which shows the relationship between the safety device and the tubular member which an operator is raising / lowering, (C) is explanatory sectional drawing which shows the relationship between a safety device and a tubular member at the time of an operator falling down and latching. It is the figure which showed the safety gear of Example 2, and the handrail which engages with this safety gear, (a) is a description perspective view of a safety gear, (b) is the front view of the handrail seen from the stairs side. It is explanatory drawing which showed the detail of the handrail frame part of Example 2, (a) is an enlarged view of the broken-line circle | round | yen part of FIG.7 (b), (b) is an enlarged view in DD part of FIG.7 (b). Sectional drawing, (c) is an explanatory perspective view of the locking bar, (d) is a right side view and a left side view of the handrail frame portion. It is the schematic which showed the relationship between the tubular member, the engaging member of a safety gear, and a rope-shaped member, (a) is sectional drawing and a top view which show the state at the time of an operator going up stairs, (b) is It is sectional drawing and a top view which show a state when an operator goes down stairs, and (c) A sectional view and a top view showing a state which prevents a worker from falling when falling down. It is the figure which showed the modification of the handrail frame part of Example 2, (a) is the front view which looked at the tubular member from the staircase side, (b) is the front view and side view of a moving fastener, (c) is It is explanatory perspective view which showed the use condition of the movement fastener at the time of going down the stairs. It is the figure which showed the safety gear of Example 3, and the handrail which engages with this safety gear, (a) is a description perspective view of a safety gear, (b) is the front view of the handrail seen from the stairs side. It is explanatory drawing which showed the detail of the handrail frame part of Example 3, (a) is an enlarged view of the broken-line circle | round | yen part of FIG.11 (b), (b) is an explanatory perspective view of a notch part. It is explanatory drawing which showed the relationship between the handrail frame part and safety implement at the time of an operator raising / lowering a staircase, (a) is an explanatory perspective view which shows the state which the rope-shaped member has passed through locations other than a notch part (B) is an explanatory plan view showing a state where the rope-shaped member passes over the opening of the notch. It is the schematic which showed the relationship between the lower part of a slit, the engaging member of a safety gear, and a rope-shaped member at the time of a worker falling down etc. when going up the stairs.

  Hereinafter, preferred embodiments of a safety device of the present invention and a handrail for engaging the safety device will be described with reference to the drawings.

  FIG. 1 is a schematic front view showing a state in use of the safety device 10 according to the first embodiment and a handrail 100 for engaging the safety device 10.

As shown in FIG. 1, the safety device 10 is used with one end attached to a safety belt 1 worn by an operator and the other end attached to a handrail 100 of a staircase.
The safety belt 1 is a torso belt type safety belt for general high-altitude work, and includes a rope portion 1a as a lifeline, a belt 1b that is attached to a worker's torso portion and holds a human body when falling, and a rope portion. It consists of a hook portion 1c that holds 1a on a support or the like. In addition, if the safety belt | band | zone 1 is a thing for preventing a worker's fall and fall, it will not be restricted to such a belt type.
The safety device 10 includes an engaging member 11, a rope-like member 15, and a hooking member 13. By attaching the latch member 13 of the safety device 10 to the hook portion 1c of the safety belt 1 and attaching the engaging member 11 to the handrail frame portion 101 of the handrail 100 described later, the operator and the handrail 100 are connected, Ensure the safety of moving workers.

2A and 2B are views showing the safety device 10 according to the first embodiment and a handrail 100 for engaging the safety device 10, wherein FIG. 2A is a perspective view of the safety device 10 and FIG. 2B is a handrail viewed from the stairs side. FIG.
As shown in FIG. 2A, the safety device 10 includes an engaging member 11 inserted into the tubular member 110 of the handrail frame portion 101 and a hooking member for hooking on the hook portion 1 c of the safety belt 1. 13 and a rope-like member 15 connecting them.

The engaging member 11 includes a substantially spherical main body portion 11a and a holding portion 11b provided on the spherical surface of the main body portion 11a. The surface of the main body 11a is processed and smooth. The holding part 11b is a tongue-shaped member, and its base part is fixed to the main body part 11a. Further, an attachment hole X for attaching the rope-like member 15 is provided in a substantially central portion of the holding portion 11b.
The engaging member 11 has such a weight that the rope-like member 15 does not loosen and does not become a burden on the operator when the latching member 13 of the safety device 10 is pulled.

The latch member 13 is a metal ring-shaped member, and one end side of the rope-shaped member 15 is attached thereto. As described above, the hook member 1c of the safety belt 1 is detachably hooked on the hook member 13.
The other end side of the rope-like member 15 is attached to the attachment hole X of the holding portion 11 b of the engaging member 11. The rope-like member 15 has a substantially circular cross section, and is made of a material having a strength capable of withstanding the weight of the operator and a load of a tool or the like worn by the operator when falling from the stairs. . Further, the rope-like member 15 is attached so that it does not come off even when the aforementioned weight and load are applied to the attachment portions of the engaging member 11 and the retaining member 13.

As shown in FIG. 2 (b), the handrail 100 includes a handrail frame portion 101 that is held by a hand when supporting the body and assisting the raising and lowering of the stairs, and the handrail frame portion 101 at an appropriate height. In order to support along the inclination and prevent a fall from the lower side of the handrail frame portion 101 to the outside of the staircase, the support member 105 includes a plurality of support members 105 provided in a fence shape at substantially equal intervals.
The handrail frame portion 101 is a substantially cylindrical tubular member 110 provided with an elongated slit portion 114. The slit portion 114 is formed by cutting out a part of the side wall on the staircase side of the tubular member 110 in a straight line parallel to the central axis direction of the tubular member 110, and as described later, the rope shape of the safety device 10 The member 15 passes through the slit portion 114. The lower end portion 110a and the upper end portion 110b of the handrail frame portion 101 are shaped like the tubular member 110 cut in the vertical direction.

3A and 3B are explanatory views showing details of the handrail frame portion 101 of the first embodiment, in which FIG. 3A is an enlarged view of a broken-line circle portion of FIG. 2B, and FIG. (C) is a description perspective view of the notch part 116, (d) is the right side view and left side view of the handrail frame part 101.
As shown in FIG. 3 (a), the upper portion 114a in the vertical direction of the slit 114 is substantially linear, but the lower portion 114b has an opening 116a, and is a substantially letter-shaped notch 116 in front view. Is formed. The right end portion in front view of the notch 116 is formed so as to be gently connected to the lower portion 114b of the slit. The edge of the bottom surface portion 116b on the lower side in the vertical direction of the notch 116 is parallel to the step board of the staircase when viewed from the front. Further, as shown in FIG. 2B, a plurality of the notches 116 are provided so as to be located at a substantially central portion between the support members 105 erected at the substantially central portion of the tread.

  The cross section (A-A portion in FIG. 2B) of the tubular member 110 of the handrail frame portion 101 is substantially C-shaped as shown in FIG. 3B, and has a substantially circular hollow portion 112. The slit part 114 cut out in parallel with the central axis of the tubular member 110 is provided slightly above the side surface of the staircase having a substantially donut shape in cross section. The inner wall side and outer wall side of the upper part 114a and the lower part 114b of the slit are curved surfaces, and the central part is substantially straight, so that the rope-shaped member 15 is not damaged. Further, the polishing is performed so that the friction coefficient with the rope-like member 15 is reduced.

FIG. 3C is an explanatory perspective view of the notch 116.
The notch 116 is provided so that the lower portion 114b of the slit is notched in a substantially letter shape on the lower side in the vertical direction as described above. The rectangular bottom surface portion 116b of the notch 116 has a gentle slope, with the side on the inner wall side and the side on the outer wall side parallel to the tread surface of the staircase. Specifically, it is formed so that the position of the side on the outer wall side is the lower side in the vertical direction than the side on the inner wall side.

FIG. 3D shows a left side view (lower end portion 110a) and a right side view (upper end side 110b) of the handrail frame portion 101. The lower end portion 110a and the upper end portion 110b of the handrail frame portion 101 are formed so as to cut the tubular member 110 in the vertical direction, and have a substantially oval shape in a side view. Since the handrail frame portion 101 is the tubular member 110 as described above, each hollow portion 112 is also elliptical.
In the lower end portion 110a of the handrail frame portion 101, the upper side of the hollow portion 112 is used as a substantially circular access hole 112a for taking in and out the engaging member 11 of the safety device 10, and the engaging member 11 is hollow at the lower side. A receiving portion 112x is formed so as not to fall from the portion 112. On the other hand, for the upper end side 110b, the hollow portion 112 is used as it is as the entrance / exit hole 112b, so the receiving portion 112x is not provided.

Next, the relationship such as the size of each component will be described.
As shown in FIG. 3B, the diameter r of the sphere of the main body 11 a of the engaging member 11 is smaller than the diameter of the inner circumference of the cross section perpendicular to the central axis direction of the handrail frame 101, and the hollow portion 112. Can be moved easily. In addition, the engagement member 11 itself has a size that does not fit into the slit portion 114 or the cutout portion 116 or fall off from the slit portion 114 or the cutout portion 116 no matter what force is applied to the engagement member 11 itself.
The length of the bottom surface portion 116b of the notch 116 provided in the lower portion 114b of the slit in the central axis direction of the tubular member 110 is substantially the same as the diameter of the cross section perpendicular to the central axis direction of the rope-shaped member 15. It is.

A method for using the safety device 10 of the first embodiment and the handrail 100 for engaging the safety device 10 will be described below.
First, the operator attaches the hook portion 1 c of the safety belt 1 that is worn to the hooking member 13 on one end side of the safety device 10. Then, when going up the stairs, the engaging member 11 on the other end side of the safety device 10 is inserted into the hollow portion 112 of the tubular member 110 from the entrance / exit hole 112a of the lower end portion 110a of the handrail frame portion 101 described above. As described above, since the receiving portion 112x is formed in the lower end portion 110a, the engaging member 11 does not fall from the tubular member 110 even if the hand is released from the safety device 10 (see FIG. 3D). . Further, when descending the stairs, the engaging member 11 is inserted into the access hole 112b of the upper end portion 110b of the handrail frame portion 101 described above. The engaging member 11 descends below the hollow portion 112 of the tubular member 110 due to its own weight. By making such a preparation, the worker's body is connected to the handrail frame 101 via the safety device 10.

After inserting the engaging member 11 into the entrance / exit hole 112 a or the entrance / exit hole 112 b, the operator passes the rope-like member 15 of the safety device 10 through the slit portion 114 and moves along the handrail frame portion 101.
FIG. 4 is a schematic view showing the relationship between the tubular member 110 and the engaging member 11 and the rope-like member 15 of the safety device 10 when an operator moves up and down the stairs. The explanatory top view which shows the state which removed the upper half of No., (b) is explanatory sectional drawing in the BB part of (a). The upward direction of the drawing is the upper side of the stairs.
As shown in FIG. 1, when the worker goes up the stairs, the safety device 10 has a hook-like portion 1 c of the safety belt 1 that is worn as the worker moves, and the rope-like member 15 through the hooking member 13. And the engaging member 11 is pulled. Therefore, as shown in FIGS. 4A and 4B, the rope-like member 15 moves in contact with the upper portion 114a of the slit as the operator moves. Further, the engaging member 11 is pulled by the rope-like member 15 and moves so as to slide on the bottom of the inner wall surface of the tubular member 110.
Also when descending the stairs, the engaging member 11 descends first while sliding the hollow portion 112 of the tubular member 110 forward (downward) from the operator due to its own weight to the inner wall of the tubular member 110 on the spherical lower side. Go. Therefore, the operator follows the engaging member 11. In other words, the engaging member 11 and the rope-like member 15 of the safety device 10 move with respect to the tubular member 110 in substantially the same positional relationship (see FIG. 4) both when going up and down the stairs.

  When the operator moves up and down, the end portion attached to the engaging member 11b of the rope-like member 15 is positioned so as to lightly rub against the upper portion 114a as shown in FIG. It moves so that it may come to the position which does not touch the lower part 114b of this slit. Specifically, the length of the rope-like member 15 or the rope portion 1a of the safety belt 1, the position to go up the stairs (distance from the handrail frame 101 portion), and the like are adjusted. By doing in this way, it can prevent that the rope-shaped member 15 gets caught in the notch part 116 provided in the lower part 114b of a slit, and prevents a worker's movement.

FIG. 5 is a schematic diagram showing the relationship between the tubular member 110 and the engaging member 11 and the rope-like member 15 of the safety device 10 when an operator falls on the stairs, and (a) is the tubular member. 110 is an explanatory plan view showing a state in which the upper half of 110 is removed, and FIG. The upward direction of the drawing is the upper side of the stairs.
If the operator falls while moving up and down the stairs, the position of the operator's waist is lowered, and the safety device 10 attached to the safety belt 1 is pulled downward in the vertical direction. Therefore, the substantially spherical engaging member 11 that has been pulled obliquely upward by the rope-like member 15 rotates so that the holding portion 11b approaches the inner wall surface of the tubular member 110 as shown in FIG. Arrow direction). Further, the rope-shaped member 15 moves downward in the stairs so as to press the lower portion 114b of the slit downward in the vertical direction. As described above, the notch 116 is provided in the lower portion 114b of the slit. Therefore, the one end portion of the rope-like member 15 on the side of the engaging member 11 and the holding portion 11b of the engaging member 11 move so as to fall from the opening portion 116a of the notch 116 to the bottom surface portion 116b, and FIG. As shown in (b), the main body portion 11 a of the engaging member 11 is prevented from coming off and is locked by the notch portion 116. Thereby, a fall from an operator's stairs can be prevented.

  When the worker has finished going up or down the stairs, the operator pulls the rope-like member 15 by hand and takes out the engaging member 11 from the entrance / exit hole 112b or the entrance / exit hole 112a of the tubular member 110. And the latching member 13 is removed from the hook part 1c of the safety belt | band | zone 10. In this way, the worker can move up and down the stairs while ensuring safety.

In the first embodiment, it is necessary to prevent the rope-like member 15 from being caught by the notch 116 when the stairs are raised and lowered. In order to keep the safety device 10 in this way, it is desirable to have the following structure.
The radius of the engaging member 11 is desirably larger than the height s (see FIG. 4B) in the vertical direction from the inner peripheral bottom surface of the tubular member 110 to the opening 116a of the notch 116. This is to prevent the one end portion of the rope-shaped member 15 on the engaging member 11 side and the holding portion 11b of the engaging member 11 from contacting the opening portion 116a of the notch portion 116. Further, it is desirable that the position of the center of gravity of the engaging member 11 is in a portion in contact with the tubular member 110 on the lower side in the vertical direction of the main body portion 11a of the engaging member 11 in the state shown in FIG. This is because the rope-like member 15 can be moved while maintaining a posture in contact with the upper portion 114a of the slit. Moreover, it can prevent that the rope-shaped member 15 and the rope part 1a of the safety belt | band | zone 1 twist by moving the main-body part 11a so that it may slip, not rolling.

  As shown in FIG. 2B, the notch 116 is provided so as to be positioned at a substantially central portion between the support members 105 erected at the substantially central portion of the tread. This is to prevent the weight of the worker from being applied to only one support member 105 when the operator falls and the rope-shaped member 15 is locked to the notch 116. In addition, when the operator goes up and down the stairs, the worker's waist position, that is, the safety belt 1 undulates in a substantially horizontal direction and a substantially vertical direction alternately when the knee is stretched straight each time the stairs are raised. Move to. Specifically, as shown in FIG. 1, the body moves in a substantially horizontal direction before and after the posture where the weight is put on the front leg. And when an operator extends the leg before carrying a weight and goes up one step, it moves in a substantially vertical direction. In consideration of this, in the present embodiment, when moving in a substantially vertical direction, that is, when the rope-like member 15 is pulled upward, the position of the notch 116 passes above the opening 116a of the notch 116. Is provided. If it does in this way, it can prevent that the rope-shaped member 15 touches the opening part 116a of the notch part 116. FIG.

In the present embodiment, the slit portion 114 is provided slightly above the side surface of the staircase side having a substantially donut shape in cross section. If only the lifting and lowering of the operator is taken into consideration, it is desirable that the position of the slit portion 114 is increased upward so that the engaging member 11 does not come off. However, considering that the operator grasps the handrail frame 101 and moves up and down, a shape that secures the positional relationship between the engaging member 11 and the rope-like member 15 of the safety device 10 and the tubular member 110 as described above. It is as.
Further, the slope shape of the bottom surface portion 116b of the notch 116 described above prevents the locked rope-like member 15 from being cut at the side of the bottom wall portion 116b on the outer wall side, and the operator, the support member 105, and the like. This is to alleviate the collision.

The shape of the safety device 10 and the handrail 100, the size of each part, and the like are not limited to the configuration of the first embodiment. For example, the engaging member 11 according to the first embodiment has a substantially spherical shape, but may have a hook shape or an elliptical shape. Since the surface is gentler than the spherical shape, even if the inner wall surface has irregularities, it can move smoothly.
Moreover, although the shape of the latching member 13 of Example 1 is a ring shape, what is necessary is just to be able to latch on the safety belt | band | zone 1, for example, hook shape etc. may be sufficient.
The handrail 100 is not limited to a straight line, and may be provided on a spiral staircase or may use a support member 105 attached to a wall. Moreover, if there is a landing, etc., and the handrail 100 has a bent portion, the engaging member 11 having such a size that the engaging member 11 can be inserted and removed before and after the bent portion is used. You may do it. In addition, if the handrail 100 that is horizontal at the landing is a slit portion 114 that is not provided with the notch portion 116, the operator does not have to put in and out the engaging member 11 as long as it can pass through the bent portion. Can move.

As for the rope-shaped member 15, a protective part such as a metal cover is attached to a portion of the one end side of the engaging member 11 in contact with the upper portion 114 a of the slit so as to prevent it from being worn and cut. Also good. Moreover, you may give the role of the shock absorbing material which reduces the impact at the time of a fall to a protection part. The protective part may also cover the holding portion 11b of the engaging member 11.
Furthermore, instead of adjusting the twist of the rope-like member 15 or the holding portion 11b of the engaging member 11 by the position of the center of gravity as described above, the holding portion 11b and the rope-like member 15 are moved. You may connect via a rotating ring.

According to the safety device 10 of Example 1 and the handrail 100 on which the safety device 10 is engaged, the safety device 10 can easily connect the safety belt 1 and the handrail 100 worn by the operator. It is possible to prevent a person from falling from the stairs. That is, when the operator slides his / her foot, the engaging member 11 of the safety device 10 is engaged with the tubular member 110 of the handrail frame portion 101, and the rope-like member 15 or the like becomes the notch portion 116. By being locked, the operator can be reliably prevented from falling.
The worker only needs to perform the work of attaching the safety device 10 before going up the stairs. And since the engaging member 11 moves the hollow part 112 of the tubular member 110, it can move irrespective of presence of a support | pillar. As described above, since it can be easily attached and detached, it can be performed without taking time, and the burden on the operator is light. Furthermore, the existing handrail can be processed into the structure of the handrail 100, or the handrail frame portion 101 can be provided on the column upper stairs side of the existing handrail. Since the safety device 10 and the handrail 100 for attaching the safety device 10 have a simple structure, they are easy to manufacture and economical.

A safety device 10x, which is a modification of the safety device 10 of the first embodiment, will be described below with reference to the drawings. The safety device 10x has a member that rolls, whereas the safety device 10 slides on the hollow portion 112 of the tubular member 110.
6A and 6B are schematic views of a modified example (safety device 10x) of the safety device 10 according to the first embodiment, in which FIG. 6A is a perspective view of the safety device 10x, and FIG. FIG. 4C is an explanatory cross-sectional view showing the relationship between the safety device 10x and the tubular member 110 when the operator falls and is locked. In addition, about the same structure as the safety gear 10 or the tubular member 110, the same code | symbol as FIGS.

As shown in FIG. 6A, the engaging member 12 of the safety device 10x holds a substantially semi-cylindrical main body portion 12a and one end portion of the rope-shaped member 15 provided on the plane portion of the main body portion 12a. It comprises a holding part 12b. Since the rope-shaped member 15 and the hooking member 13 are the same as those of the safety device 10, the description thereof is omitted.
As shown in FIG. 6A, the substantially semicircular left side surface and right side surface of the main body portion 12a are shaped such that the plane portion side is slightly depressed. The portion where the planar portion of the main body portion 12a is in contact with the outer peripheral wall is concave, and the columnar buffer portion 14 is attached. When the operator falls and abuts against the inner wall of the tubular member 110, it is made of a material having a large friction coefficient so as to reduce the impact and reduce the falling speed. Further, four spherical rotating bodies 16 are attached to the outer peripheral wall of the main body portion 12a so as to be on a plane parallel to the plane portion of the main body portion 12a. These rotators 16 are arranged such that their four center points are on the vertices of a substantially rectangular shape. Moreover, as shown in FIG.6 (b), the rotary body 16 protrudes from the main-body part 12a, and rotates freely, maintaining the state hold | maintained at the main-body part 12a.

As shown in FIG. 6B, when the operator moves, the rotating body 16 rotates on the inner wall surface of the tubular member 110, so that the main body 12a supported by the rotating body 16 moves. The safety device 10x has a weight such that the body portion 12a does not float from the bottom of the inner wall of the tubular member 110 when the main body portion 12a is pulled by the rope member 15. The size of the engaging member 12 is the same as that of the safety device 10 such that it does not come out of the slit 114 or the like.
When the operator falls, the rope-like member 15 is pulled, the main body portion 12a rotates clockwise, and moves so that the buffer portion 14 is pressed against the inner wall of the tubular member 110. As shown in FIG. 6C, one end side of the rope-like member 15 held by the holding portion 12b at the position of the notch 116 of the lower portion 114b of the slit is the bottom surface of the notch 116 of the tubular member 110. It falls into the part 116b and prevents the engagement member 12 from moving. In this way, the operator can be prevented from falling.

  The shape of the safety device 10x as a modification, the size of each part, and the like are not limited to the configuration of the present embodiment. While the safety device 10 slides on the inner wall surface of the tubular member 110, the use of a rotating body is a feature of the safety device 10x. For example, if the shape of the tubular member 110 of the handrail frame portion 101 is a quadrangular prism shape, the shape of the engaging member 12 can also be a quadrangular prism shape accordingly. In the present embodiment, the rope-like member 15 is attached to the flat portion of the main body 12 a so as to be perpendicular to the central axis direction, but the rope-like member 15 may be provided along the direction pulled by the latching member 13. . Further, the shape of the buffer portion 14 and the position and number of the rotating body 16 are not limited to this.

  According to the safety device 10x, since the position of the planar portion (holding portion 12b) of the main body portion 12a is higher than the lower portion 114b of the slit, the one end on the main body portion 12a side of the rope-shaped member 15 is a tubular member. 110 is stably held so as to move in the space of the slit portion 114. Therefore, the rope-like member 15 can be prevented from being caught by the notch 116. If the rotating body 16 is rotated only in the central axis direction of the tubular member 110, the movement of the engaging member 12 is further stabilized. Therefore, the operator can move up and down the stairs without paying attention to the relationship between the rope-shaped member 15 and the tubular member 110. Further, by using the rotating body 16, it is possible to reduce the friction and facilitate the movement.

  The safety device 20 according to the second embodiment and the handrail 200 for engaging the safety device 20 are different in that the locking rod 218 is disposed in the slit portion 114, the usage method, and the like. Almost the same as 1. Hereinafter, a different part from Example 1 is demonstrated, and about the same structure and member as Example 1, the same code | symbol is attached | subjected.

FIG. 7 is a view showing the safety device 20 of Example 2 and the handrail 200 for engaging the safety device 20, wherein (a) is an explanatory perspective view of the safety device 20, and (b) is viewed from the stairs side. 2 is a front view of a handrail 200. FIG.
As shown in FIG. 7A, the safety device 20 has a smaller engagement member 21 than the safety device 10. When the engaging member 21 moves through the hollow portion 112 of the tubular member 110, the engaging member 21 does not come into contact with a locking rod 218 described later. In Example 2, the rope-like member 15 may move in contact with the lower portion 114b of the slit as will be described later. Therefore, the radius of the engaging member 21 may be smaller than the height s (see FIG. 4B) in the vertical direction from the inner peripheral bottom surface of the tubular member 110 to the opening portion 116a of the notch 116 (see FIG. 4B). 8 (b)).
As shown in FIG. 7B, the handrail frame portion 201 is obtained by attaching a locking rod 218 to a substantially cylindrical tubular member 110 provided with an elongated slit portion 114. The locking rod 218 is disposed at a substantially central position in the vertical direction between the upper portion 114a and the lower portion 114b of the slit.

8A and 8B are explanatory views showing details of the handrail frame portion 201 of the second embodiment, in which FIG. 8A is an enlarged view of a broken-line circle portion of FIG. 7B, and FIG. FIG. 4C is an enlarged cross-sectional view of a portion D, FIG. 3C is an explanatory perspective view of the locking rod 218, and FIG.
As shown in FIGS. 8A, 8 </ b> B, and 8 </ b> C, the locking rod 218 is positioned substantially vertically below the upper portion 114 a of the slit and is more tubular than the outer peripheral wall of the handrail frame portion 201. The member 110 is arranged from the central axis. By being provided on the center side, when the operator grips the handrail frame portion 201, the locking rod 218 is configured not to be applied with excessive force. The surface of the locking rod 218 is polished so that the friction coefficient is small.

  The locking rod 218 is made of a material having a strength that does not cut or bend even when the weight of the engaging member 21 and the rope-like member 15 is applied. Further, when the operator falls, when the weight of the operator is applied by the holding portion 21b of the rope-like member 15 or the engaging member 21, the portion is easily cut or stretched. Or it consists of materials. For example, when a certain force is applied by the rope-like member 15 or the like. If it is an elastic material that can be cut or a thin wooden locking rod 218, a V-shaped cut is made in the lower portion 114b of the lower portion 114b to face the notch 116 so that it can be easily broken. (Not shown). It should be noted that the structure or material is such that a part of the member does not fall at that time.

  In Example 2, as will be described later, the place where the rope-shaped member 15 moves is different between when going up the stairs and when going down. As shown in FIG. 8B, when the worker goes up the stairs, it is between the locking bar 218 and the lower portion 114b of the slit (space a), and when the worker goes down the stairs, the upper portion 114a of the slit. The rope-shaped member 15 is passed between the locking rod 218 (space b). Each of these intervals has such a length that the rope-like member 15 can easily move.

  As shown in FIGS. 7 (b) and 8 (d), a flat plate connecting portion 218a having a substantially acute triangular shape is provided at both ends of a locking rod 218 made of a rod-shaped material so as to face each other. The base portion of the connecting portion 218a is fixed to each side surface (the lower end side 110a and the upper end side 110b) of the upper portion 114a of the slit by a locking tool or the like. In addition, the portions of the both ends of the tubular member 110 to which the base portion of the connecting portion 218a is fixed are substantially the same width as the thickness of the connecting portion 218a and are cut away in the direction of the center of the tubular member 110 so as not to protrude. ing.

A method of using the safety device 20 of Example 2 and the handrail 200 that engages the safety device 20 will be described below when going up and down the stairs. Note that the removal step is the same as that in the first embodiment, and is therefore omitted.
FIG. 9 is a schematic view showing the relationship between the tubular member 110, the engaging member 21 of the safety device 20, and the rope-like member 15, and (a) is a cross-sectional view showing a state when the worker climbs the stairs. FIG. 4B is a cross-sectional view and a plan view showing a state when the worker goes down the stairs, and FIG. 4C is a cross-sectional view and a plan view showing a state in which the worker is prevented from falling when falling down. . The upward direction of the drawing is the upper side of the stairs.
First, the case of going up the stairs will be described.
The operator passes the hooking member 13 between the locking bar 218 and the lower portion 114b of the slit (the space a shown in FIG. 8B) and then wears the hook portion of the safety belt 1 worn. Hang on 1c. This is because the locking rod 218 is attached to the tubular member 110 by the connecting portion 218a. Then, the engaging member 21 is inserted into the hollow portion 112 of the tubular member 110 from the entrance / exit hole 112 a of the lower end portion 110 a of the tubular member 110 of the handrail frame portion 201. By making such a preparation, the worker's body is connected to the handrail frame portion 201 via the safety device 10.

  When the engaging member 21 is inserted into the access hole 112a, the worker goes up the stairs along the handrail frame 201 of the stairs. As the worker moves, the hook portion 1 c of the safety belt 1 that is worn pulls the rope-shaped member 15 and the engaging member 21 through the hooking member 13. Therefore, as the operator moves, as shown in FIG. 9A, the rope-like member 15 slides on the lower portion 114b of the slit and the notch 116 (the space b shown in FIG. 8B). Move to. Further, the engaging member 21 is pulled by the rope-like member 15 and moves so as to slide on the bottom of the inner wall surface of the tubular member 110. Since the right side portion of the notch 116 is a gentle slope as shown in FIG. 8C, even if the rope-like member 15 falls into the bottom portion 116b of the notch 116, the rope-like member 15 The operator can move smoothly without being caught by the notch 116.

  When the operator falls while going up the stairs, the one end portion of the rope-shaped member 15 on the engaging member 21 side and the holding portion 21b of the engaging member 21 are locked by the bottom surface portion 116b. The details are the same as in the case of the first embodiment, and will be omitted.

Next, the case of going down the stairs will be described.
The operator first passes the hooking member 13 between the locking rod 218 and the upper portion 114a of the slit (the space b shown in FIG. 8B), and then the hook portion of the safety belt 1 worn. Hang on 1c. This is because the locking rod 218 is attached to the tubular member 110 by the connecting portion 218a. Then, the engaging member 21 is inserted into the hollow portion 112 of the tubular member 110 from the entrance / exit hole 112 b of the upper end portion 110 b of the tubular member 110 of the handrail frame portion 201. The engaging member 21 enters the lower side of the tubular member 110 due to its own weight or the like. By making such a preparation, the worker's body is connected to the handrail frame portion 201 via the safety device 10.

  When the engaging member 21 is inserted into the entrance / exit hole 112b, the operator goes down to the handrail frame portion 201 of the stairs. As the worker moves, the engaging member 21 descends the hollow portion 112 of the tubular member 110 while pulling the rope-like member 15 by its own weight or the like. Therefore, as the operator moves as shown in FIG. 9B, the rope-like member 15 moves so as to slide along the locking rod 218 in the space b shown in FIG. 8B. Since the surface of the locking bar 218 has a small coefficient of friction, the operator can move smoothly without the rope-like member 15 being caught.

When the operator falls while going down the stairs, the position of the operator's waist falls, and the safety device 10 attached to the safety belt 1 is pulled downward in the vertical direction. Therefore, first, the engaging member 21 is pulled up to the vicinity of the position where the operator has fallen, and immediately after that, the rope-shaped member 15 is pressed downward in the vertical direction against the locking rod 218. As described above, the locking rod 218 has a material or structure that is easily cut or the like by the rope-like member 15 or the like when the operator's weight is applied. Therefore, when the operator falls, the situation falls from the cut portion of the locking rod 218 to the lower portion 114b of the slit, and the situation is the same as when the operator falls down when going up the stairs.
Therefore, as shown in FIG. 9C, the rope-shaped member 15 and the like are locked at the bottom surface portion 116 b of the notch portion 116. Thereby, a fall from an operator's stairs can be prevented.

  As described above, if the safety device 20 and the handrail 200 for engaging the safety device 20 shown in the second embodiment are used, the operator can pay more attention only to the position where the latch member 13 is passed during engagement. It can move smoothly and can be protected from accidental falls from stairs. Specifically, unlike the case of the first embodiment, the locking rod 218 is disposed, so that the rope-like member 15 and the like move with care so as to maintain an angle so as to contact the upper portion 114a of the slit. There is no need. That is, regardless of the height of the operator's waist (the height at which the latching member 13 is latched), the distance from the handrail 200 when the operator moves, the operator can easily and safely move the stairs. You can go up and down.

Next, a handrail frame 202 that is a modification of the handrail frame 201 of the second embodiment will be described below with reference to the drawings. The handrail frame 202 is formed with a locking bar 218x by a method different from that of the handrail frame 201. When going down the stairs, a moving fastener 219, which will be described later, is attached to the locking bar 218x, and the rope-like member 15 is moved using the moving fastener 219.
10A and 10B are views showing the handrail frame portion 202, where FIG. 10A is a front view of the tubular member 110 viewed from the staircase side, FIG. 10B is a front view and a side view of the moving fastener 219, and FIG. It is explanatory perspective view which showed the use condition of the movement fastener 219 at the time of going down the stairs. The same parts as those of the handrail frame 201 are denoted by the same reference numerals as those in FIGS.

  As shown in FIG. 10A, unlike the handrail frame portion 201, the handrail frame portion 202 has a slit formed on the tubular member 110, which is formed of a slit portion 114x and a slit portion 114y, in parallel to the central axis direction thereof. A portion 114 is provided to form the locking rod 218x. Therefore, unlike the handrail frame portion 201, it is not necessary to provide the connecting portion 218a on the locking rod 218. Further, although not shown in the drawings, in order to give strength to the locking bar 218x, a barb may be formed at the lower end portion of the locking bar 218x. If the semicircular arc-shaped barb is provided in the central axis direction in a cross-sectional view of the tubular member 110 with respect to the central axis direction, wear of the rope-shaped member 15 when going up the stairs can be prevented.

  As shown in FIG. 10 (b), the moving fastener 219 is a substantially elliptical linear member made of an elastic material, and both end portions of the moving fastener 219 are warped outward to form an opening 219x. The moving fastener 219 is easily hooked on the locking rod 218x and has an elastic force with which the rope-like member 15 can be easily attached and detached. Further, when the worker goes up and down the stairs, the rope-like member 15 does not come off, and when the operator falls down and the weight of the worker is applied, only the rope-like member 15 is easily removed from the opening 219x. It has power.

Before going down the stairs, the operator inserts the moving fastener 219 in parallel with the slit 114x and uses the opening 219x so that the opening 219x faces downward as shown in FIG. 10C. Hang on the stop rod 218x.
Further, the operator attaches the rope-like member 15 of the safety device 10 to the opening 219x side of the moving fastener 219 of the locking bar 218x using the opening 219x (not shown). As a result, the rope-shaped member 15 can move along the locking bar 218x together with the moving fastener 219.
The moving fastener 219 can be easily attached / detached to / from the locking bar 218x and the rope-shaped member 15, and can be easily moved along the locking bar 218x while holding the rope-shaped member 15. To. Moreover, if the movement fastener 219 has the said effect, it will not be restricted to a linear member.

  The effects when the handrail frame 202 of the second embodiment is used are as follows. Since the handrail frame portion 202 does not need to be provided with the connecting portion 218a unlike the handrail frame portion 201, the locking rod 218x can be easily created. In addition, the locking rod 218x having strength can be formed as described above. Furthermore, since the rope-like member 15 is easily detached from the moving fastener 219 when it falls by using the moving fastener 219 made of an elastic material, the impact on the operator can be further reduced. The moving fastener 29 may be used not only when going down the stairs but also when going up.

  The shape of the safety device 20 and the handrail 200, the size of each part, and the like are not limited to the configuration of the present embodiment, as in the first embodiment. The position, structure, and material of the locking rods 218 and 218x, the structure and material of the moving fastener 219, and the like are not limited to the present embodiment. For example, although not shown, the moving fastener 219 has a structure in which the opening 219x is provided in two steps in the major axis direction of the ellipse and is double-hanged on the locking rod 218x, so that it is less likely to come off from the locking rod 218x. It is good also as a structure. It is possible to prevent the locking rod 218x and the rope-shaped member 15 from rubbing, and the movement becomes easier.

  The safety device 30 according to the third embodiment and the handrail 300 for attaching the safety device 30 are different from the first embodiment in the shapes of the main body 31a and the notch 316, but the shapes of the respective members are almost the same as those in the first embodiment. Absent. Hereinafter, a different part from Example 1 is demonstrated, and about the same structure and member as Example 1, the same code | symbol is attached | subjected.

FIG. 11 is a view showing the safety device 30 of Example 3 and the handrail 300 for engaging the safety device 30, (a) is an explanatory perspective view of the safety device 30, and (b) is viewed from the stairs side. 2 is a front view of a handrail 300. FIG.
As shown in FIG. 11A, the engaging member 31 includes a substantially spherical main body portion 31a, and a buffer portion 34 that is provided on the main body portion 31a and has an annular flat surface formed at the edge of a circular recess. And a protrusion 31b having a base fixed to the bottom of the circular recess. The surface of the main body portion 31a is processed smoothly, but the surface of the buffer portion 34 is made so that the friction coefficient is increased. Since the shape of the protrusion 31b itself is the same as that of the protrusion 11b of the first embodiment, the description thereof is omitted. The tip portion of the protruding portion 31b has a size that does not protrude from the plane including the buffer portion 34 of the main body portion 31a.
As shown in FIG. 11 (b), the handrail frame portion 301 of the handrail 300 of the third embodiment is provided with an elongated slit portion 114 in the substantially cylindrical tubular member 110 as in the first embodiment. The shape of 316 is different.

12A and 12B are explanatory views showing details of the handrail frame portion 301 according to the third embodiment. FIG. 12A is an enlarged view of a broken-line circle portion in FIG. 10B, and FIG. 12B is an explanatory perspective view of the notch portion 316. is there.
As shown in FIG. 12A, the lower portion 114b of the slit is formed with a notch 316 having an opening 316a in a substantially I shape in the vertical direction.
The cross section of the handrail frame 301 is substantially C-shaped as in the first embodiment, as shown in FIG. The slit part 114 cut out in parallel with the central axis of the tubular member 110 is provided on the side surface on the stairs side which is substantially circular in cross section and slightly above. The inner wall side and the outer wall side of the upper part 114 a and the lower part 114 b of the slit part 114 are curved so as not to damage the rope-shaped member 15. Further, the central portion is substantially linear, and is polished so that the friction coefficient with the rope-shaped member 15 is reduced.
The length t of the perpendicular between the tubular members 110 in the opening 316a of the notch 316 is substantially the same as the diameter of the cross section perpendicular to the axial direction of the rope-shaped member 15. As in the first embodiment, the rectangular bottom surface portion 316b of the notch 316 has the inner wall side and the outer wall side parallel to the step surface of the staircase, and the position of the outer wall side is more vertical than the inner wall side. It is formed on the lower side of the direction and has a gentle slope.

The method of using the safety device 30 according to the third embodiment and the handrail 300 for engaging the safety device 30 are substantially the same as those in the first embodiment, and thus will not be described. Hereinafter, the relationship between the tubular member 110, the engaging member 31 of the safety device 30, and the rope-shaped member 15 will be described.
FIG. 13 is an explanatory view showing the relationship between the handrail frame portion 301 and the safety device 30 when the worker ascends and descends the stairs. FIG. 13A shows the rope-like member 15 passing through a portion other than the notch portion 316. (B) is an explanatory plan view showing a state in which the rope-like member 15 is passing over the opening portion 316a of the notch 316. The upward direction of the drawing is the upper side of the stairs.
As shown in FIG. 13 (a), in this embodiment as well, the rope-like member 15 moves while being pulled so as to be in contact with the upper portion 114a of the slit of the handrail frame portion 301 when going up the stairs as in the first embodiment. To do. Further, even when going down the stairs, that is, when moving downward as indicated by the arrow Y, the engaging member 31 has a desired weight as in the first embodiment, so that the rope-like member 15 does not loosen. ing.

  FIG. 13B is an explanatory plan view showing a state where the rope-shaped member 15 passes through the opening 316 a of the notch 316. The length t of the perpendicular between the tubular members 110 in the opening 316a of the notch 316 is substantially the same as the diameter of the cross section perpendicular to the axial direction of the rope-like member 15 as described above. The rope-like member 15 passes obliquely over the opening portion 316a of the notch 316, and the rope-like member 15 moves on the lower portion 114b of the slit with a width larger than the diameter of the axial cross section. That is, as shown in FIG. 13B, the rope-like member 15 moves so as to straddle the opening portion 316a. Therefore, even when the position of the operator's waist is low, the position of the hooking member 13 of the rope-like member 15 is slightly lowered, and the light moves in contact with the lower portion 114b of the slit, the opening portion 316a moves to the notch portion 316. There is no decline.

  If the outer wall side part (P) located above the opening part 316a of the notch 316 and the inner wall side part (Q) located below the opening part 316a are formed so as to be slightly lower than the actual position, they are somewhat rope-like. Even if the member 15 is loosened, it can be prevented from being caught. In this embodiment, the opening 316a of the notch 316 is provided so as to be perpendicular to the central axis direction of the tubular member 110. However, if the opening 316a is provided perpendicular to the axial direction of the rope member 15 being pulled, the rope Since the member 15 can easily cross over the opening portion 316a, it can move smoothly.

FIG. 14 is a schematic view showing the relationship between the lower portion 114b of the slit, the engaging member 31 of the safety device 30, and the rope-like member 15 when the worker falls down when going up the stairs. The upward direction of the drawing is the upper side of the stairs.
Although the details have been described in the first embodiment, the engaging member 31 moves (arrow) while rotating so that the holding portion 31b approaches the inner wall surface of the tubular member 110 as shown in FIG. . As in the first embodiment, the rope-shaped member 15 falls from the opening 316a of the notch 316 to the bottom surface portion 316b and is locked by the bottom surface portion 316b of the notch portion 316. In the engaging member 31 of the present embodiment, a buffer portion 34 having a large friction coefficient is provided. Since the protruding portion 31b of the safety device 30 is disposed so as not to protrude from the plane including the buffer portion 34 of the main body portion 31a, the buffer portion 34 is pressed against the inner wall surface of the tubular member 110, The operator's falling speed can be reduced and the shock received by the operator can be reduced. Further, if an elastic material or the like is used for the buffer portion 34, the impact can be further reduced.

  The shape of the safety device 30 and the handrail 300, the size of each part, and the like are not limited to the configuration of the present embodiment, as in the first and second embodiments. Although not shown, the notch 316 may be provided with a tongue-like member or a lid-like member made of a material such as plastic so as to close the opening 316a. By doing in this way, the operator can move without paying attention to the notch 316 during normal lifting, and can move safely even if the rope-like member 15 is loosened. . If the rope-like member 15 is configured to enter the bottom surface portion 316b from the opening portion 316a by bending or detaching the tongue-like member or the like at the time of falling, the impact can be reduced and the operator can be prevented from falling. Can do.

Thus, if the safety device 30 shown in Example 3 and the handrail 300 for engaging the safety device 30 are used, the stairs can be moved more safely and the buffer portion 34 is provided. It is possible to more effectively reduce the impact of the worker when falling down.
By narrowing the interval between the tubular members in the opening 316a of the notch 316 as described above, the rope-like member 15 can be prevented from falling into the bottom surface 316b when ascending and descending the stairs, and a simple notch 316 is formed. Thus, the worker can safely move up and down the stairs. Further, since the opening 316a is narrow, it is easy to cover a tongue-like member or the like. Further, in this embodiment, the notch 316 is provided only in the lower part 114b of the slit, but if it is provided also in the upper part 114a, the operator may fall from the upper side of the handrail 300 to the outside of the stairs. Can be prevented.

The present invention is not limited to the embodiment of the invention described above, and is not limited to the configuration shown in the drawings as long as the handrail and the worker can be connected by a safety device to prevent falling or the like. Of course, various changes can be made without departing from the scope of the invention.
Moreover, not only handrails installed at an angle such as stairs but also parallel handrails used at high places and the like can be used for preventing crashes and the like. In this case, since only the vertical movement needs to be locked, the notch is not necessary. That is, in the work at a high place after going up the stairs, the work can be started without removing the safety gear from the handrail, and when the work at the high place is finished, the stairs can be lowered as it is.
Since the upper end and the lower end of the tubular member of the handrail are easily hooked on the cuffs and the like, there are cases where the upper end and the lower end of the handrail are bent downward or sideways to approach the wall surface for safety. In such a case, the entrance / exit holes may be provided at appropriate positions such as the tip portion and the bent portion of the upper end portion and the lower end portion.

  The safety device of the present invention and the handrail for engaging the safety device can be used not only at the work place but also at various places where the handrail is installed to prevent falling or falling.

1 Safety belt 10, 10x, 20, 30 Safety device 11, 12, 21, 31 Engaging member 11a, 12a, 31a Main body part 11b, 12b, 21b, 31b Holding part 13 Latching member 14, 34 Buffer part 15 Rope shape Member 100, 200, 300 Handrail 101, 201, 202, 301 Handrail frame part 105 Support member 110 Tubular member 114, 114x, 114y Slit part 114a Upper part 114b Lower part 116, 316 Notch part 116a, 316a Open part 116b, 316b Bottom portion 218, 218x Locking rod 218a Connecting portion 219 Moving fastener

Claims (7)

A safety device that is attached to a safety belt worn by an operator, prevents the operator from falling or falling, and a handrail for engaging the safety device,
The handrail (100, 200, 300) is
A handrail frame portion (101, 201, 202, 301) which is a tubular member (110) provided with a slit portion (114) in the axial direction;
A support member (105) for supporting the handrail frame portion at an appropriate height,
The safety device (10, 10x, 20, 30)
An engaging member (11, 12, 21, 31) that is inserted into the hollow portion (112) of the tubular member of the handrail frame portion and is movably attached;
A rope-like member (15) attached to one end of the engaging member;
A hook member (13) attached to the other end of the rope-like member and hooked to the safety belt,
A safety device characterized in that the engaging member is movably mounted in the handrail frame portion so that an operator can move while maintaining a state in which a safety belt is connected to the handrail, and the safety device, A handrail that attaches safety gear.   2. The safety device according to claim 1, wherein the slit portion (114) is provided with a notch (116, 316) in a downward direction in the lower portion (114 b). handrail.   The safety device according to claim 2, wherein the locking rod (218, 218x) is disposed in the space of the slit portion (114) substantially parallel to the slit portion. Handrail to do.   The handrail (200) further includes a moving fastener (219) that holds the locking rod (218, 218x) and the rope-shaped member (15) movably along the locking rod. The safety device according to claim 3 and a handrail for engaging the safety device. The rope-shaped member (15) has a substantially circular cross section;
The length of the perpendicular between the tubular members (110) in the opening portion (316a) of the notch (316) is substantially the same as the cross-sectional diameter of the rope-shaped member. Safety gear and a handrail for fastening the safety gear.   6. The safety device according to claim 5, wherein the notch (316) is further provided in an upper portion (114a) of the slit (114). In the safety device (10x), a plurality of rotating bodies (16) are further disposed on the surface of the engaging member (12), and the engaging member is turned into the tubular member (110) by rotating the rotating body. The safety device according to any one of claims 1 to 6, and a handrail for engaging the safety device.